US3866449A - Method for dividing an elongated body into separate pieces - Google Patents
Method for dividing an elongated body into separate pieces Download PDFInfo
- Publication number
- US3866449A US3866449A US38728073A US3866449A US 3866449 A US3866449 A US 3866449A US 38728073 A US38728073 A US 38728073A US 3866449 A US3866449 A US 3866449A
- Authority
- US
- United States
- Prior art keywords
- rolls
- recited
- groove
- respect
- elongated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 76
- 238000005452 bending Methods 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 description 15
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- ZPUCINDJVBIVPJ-LJISPDSOSA-N cocaine Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D31/00—Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
- B23D31/002—Breaking machines, i.e. pre-cutting and subsequent breaking
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T225/00—Severing by tearing or breaking
- Y10T225/30—Breaking or tearing apparatus
- Y10T225/307—Combined with preliminary weakener or with nonbreaking cutter
- Y10T225/321—Preliminary weakener
- Y10T225/325—With means to apply moment of force to weakened work
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49789—Obtaining plural product pieces from unitary workpiece
- Y10T29/4979—Breaking through weakened portion
Definitions
- the methods utilized for dividing elongated bodies of the above type into smaller pieces have a number of drawbacks. For example it is known to cut the elongated bodies into pieces of desired length. Such cutting may be carried out according to a hot sawing process during which the elongated metal bodies such as billets are at an elevated-temperature while acted upon by rotating circular saws. It is. also possible to cold saw the elongated body at room temperature, utilizing a rotating circular saw for this purpose.
- the cold sawing process has the same disadvantages as the hot sawing process in addition to requiring a greater length of time for the cutting operation, as compared with hot sawing.
- this method has the drawback of causing distortions as well as creating burrs, fins, or undesirably shaped ends on the resulting pieces.
- the shearing meachines very often compress the ends of the pieces undesirably so that they have a tapered configuration which must be eliminated.
- Utilization of gas for cutting through the body with a flame has the disadvantage of requiring a longer time than other methods while such a method also results in considerable waste of the metal which melts away from the original body with this method also resulting in rough ends having burrs or the like which must be eliminated.
- a more specific object of the present invention is to provide a method of this type which is capable of dividing the elongated body into separate pieces while continuously feeding the body longitudinally.
- a specific object of the present invention is to provide a method which makes it possible to break the body into the pieces of predetermined length.
- an elongated body of circular section is divided into at least a pair of pieces by first forming a circumferential groove in the exterior surface of the body between the ends thereof and thereafter rotating the body around its longitudinal axis while simultaneously bending the body at the region of the circumferential groove so that the body breaks at the location of the groove, thus achieving in this way pieces of predetermined length.
- FIG. 1 is a top plan view of a method according to the invention
- FIG. 2 is a side elevation of the method illustrated in FIG. 1;
- FIGS. 3A-3C respectively illustrate different configurations of circumferential grooves
- FIG. 4 is a schematic illustration of an apparatus for forming circumferential grooves.
- FIG. 5 is a schematic plan view of the apparatus for operating the rolls of FIGS. 1 and 2.
- an elongated body 1 is illustrated fragmentarily.
- This elongated body 1 is of a circular cross section and may, for example, take the form of a billet received from a rolling mill.
- the elongated body 1 Prior to reaching the stage of the method which is illustrated in FIG. 1, the elongated body 1 is formed at its exterior surface with a series of circumferential grooves 2, one of which is illustrated at the left portion of FIG. 1. These circumferential grooves may be formed in the body 1 in a manner described in greater detail below.
- the series of grooves 2 are longitudinally spaced from each other along the body 1 in accordance with the length of the pieces de sired. In other words the distance from one groove 2 up to the next groove 2 will correspond to the length of a desired piece which is to be broken from the elongated body 1.
- the rolls 3 and 4 are of an elongated configuration with the roll 3 having a convex curved configuration between its opposed ends while the roll 4 has a concave curved configuration between its opposed ends, and the curvature of the exterior surface of the roll 4 is approximately the same as the curvature of the exterior surface of the roll 3.
- the outer surface thereof will have a radius of curvature which will be approximately the same as the radius of curvature of the exterior surface of the roll 4 in a plane which contains the axis of the latter.
- the radii of curvature of the concave and convex rolls can be identical.
- the rolls 3 and 4 are oppositely inclined with each roll extending across the elongated body 1.
- the axes of the rolls 3 and 4 respectively form with the axis of the body 1 equal angles 0.
- the axis of the elongated body 1 coincides with the direction of feed thereof.
- the axes of the rolls 3 and 4 form equal angles with the axis of the body I.
- the rolls 3 and 4 act not to axially feed or advance the body 1 to the right, as shown by the horizontal arrow at the right of FIG. 2, but in addition while the body I travels longitudinally between the rolls 3 and 4, the body I is rotated about its axis and is bent in the manner indicated in FIG. 2.
- the rotating rolls 3 and 4 serve to pull the body I to the right, as viewed in FIG. 2, while simultaneously bending and rotating the body I.
- the actual breaking off ofa piece from the body 1 occurs when the breaking location has advanced somewhat beyond the centers of the rolls 3 and 4, so that the next portion of the body I is already pressed between the rolls 3 and 4 to be axially fed thereby, and in this way the body 1 is continuously fed in an axial or longitudinal direction by the rolls 3 and 4 so that the next circumferential groove 2 will automatically progress up to the location between the rolls 3 and 4 where the next breaking will occur as a result of the above action.
- FIGS. 3A3C respectively illustrate various possible cross-sectional configurations for the circumferential grooves 2.
- FIG. 3A illustrates that the circumferential groove 2 may have a rectangular cross section while FIGS. 3B and 3C respectively illustrate that the circumferential groove 2 may have a V-shaped cross section.
- FIG. 3B the circumferential groove 2 is defined by a pair of side surfaces which sharply intersect each other while in the case of FIG. 3C the oppositely inclined side surfaces of the circumferential groove 2 intersect at an inner rounded end surface of the circumferential groove 2.
- the circumferential grooves can be formed in the exterior surface of the body 1 in a number of different ways. For example, rotary dies similar to those used in roll-threading methods may be used. Also it is possible to cut the grooves with a suitable cutting tool or milling cutter. In addition it is possible to form the circumferential grooves with a saw or a flame from a gasoperated cutting apparatus may be used to form the grooves. Again, it is more preferable to form grooves in the exterior surface of the body 1 without giving a rotary motion thereto by pressing at least one rotary die or cutter into the surface of the body 1 or by moving a cutter in reciprocating motion around the circumference of the body 1.
- FIG. 4 One of the structures for forming each of the circumferential grooves is schematically represented in FIG. 4.
- a suitable supporting structure or base 7 carries a pair of rotary driving rolls 5 and 6 on which the elongated body 1 is supported.
- the rolls 5 and 6 are of course parallel to each other.
- the base 7 carries a standard 12 on which a lever 11 is pivoted, the lever l 1 being pivoted intermediate its ends as illustrated.
- the lever 11 swingably carries a bracket 10 on which a pair of dies 8 and 9 are supported for rotary movement.
- the pair of dies 8 and 9 are located in a common plane and have peripheral edges of V-shaped cross section, for example.
- the base 7 carries a hydraulic mechanism 13 in the form of a cylinder having in its interior a piston whose piston rod is pivotally connected to the left end of the lever l l, as illustrated in FIG. 4.
- the piston is retracted downwardly to the dot-dash line position shown for its upper end in FIG. 4, the lever II is raised at its right end so. that the dies 8 and 9 do not engage the body I.
- FIG. 5 schematically illustrates the structure operatively connected to and associated with the rolls 3 and 4 described above.
- This structure associated with the rolls 3 and 4 includes a stand or supporting framework 17 in front of which is located a front table 14 and at the rear of which is located a rear table 15, the body 1 advancing from the front table 14 through the space between the rolls 3 and 4 and the broken off pieces being received by the table 15.
- These tables may take the form of plates supporting rollers on which the work freely moves.
- the framework or support means 17 for the rollers 3 and 4 includes not only bearings for supporting the pair of rollers 3 and 4 but also an adjusting mechanism 16 in the form of vertically extending screw members rotatable in nuts carried by that part of the frame 17 which supports at least one of the rolls 3 and 4, so that in this way the vertical spacing or elevation of the rolls 3 and 4 one with respect to the other can be adjusted.
- the bearings of the support means 17 are situated in such a way that the rolls 3 and 4 are inclined with respect to each other as illustrated.
- the drive means for the rolls includes a pair of reduction gear units 19 respectively connected operatively with driving motors 18.
- the outputs of the gear reduction units 19 are respectively delivered to the rolls 3 and 4 through rotary drive shafts 21 connected through suitable universal joints on the one hand with the rolls 3 and 4 and on the other hand with the reduction units 19.
- FIG. 4 for forming circumferential grooves is situated in advance of the front table 14 so that the elongated body 1 is already provided with the circumferential grooves 2 when it is delivered to the space between the rolls 3 and 4.
- the method of the invention has the advantage of an improved output inasmuch as there are no chips or shavings which form a waste material, and the pressing of the circumferential grooves further contributes to this advantage.
- hot and cold sawing will provide scrap throughout the cross section of the work through a length on the order of 8-l0 mm, while with gas cutting methods the waste material also is determined by the thickness of the work and at each cutting operation a length of l5-20 mm of the work material is wasted.
- the dies such as the dies 8 and 9 for forming the circumferential grooves, are required only to make an extremely shallow groove on the work and are not used for cutting through the work, the operating life of the groove-forming dies is extremely long.
- angles of said rolls with respect to the longitudinal axis of the body are respectively determined with the condition that the body is fed in the longitudinal direction thereof while being rotated by the rotary motion of said rolls.
Abstract
A method of dividing an elongated body of circular section into at least a pair of pieces. Initially the body has a circumferential groove formed in its exterior surface between its ends, and then the body is simultaneously rotated while being bent at the region of the groove so that the body breaks at the location of the groove to become thereby divided into at least a pair of pieces.
Description
United States Patent [191 Wakabayashi et al.
[451 Feb. 18,1975
1 1 METHOD FOR DIVIDING AN ELONGATED BODY INTO SEPARATE PIECES [75] Inventors: Senzo Wakabayashi; Akira Kusaba;
Takayuki Koyano, all of Tokyo; Sukenori Nakano, Sagamihara; Jin-lchi Kimura; Akira Oyamada, both of Tokyo, all of Japan [73] Assignee: Nippon Kokan Kabushiki Kaisha [22] Filed: Aug. 10, 1973 [21] App]. No: 387,280
[30] Foreign Application Priority Data Aug. 24, 1972 Japan 47-84076 [52] [1.8. C] 72/70, 29/413, 225/965 [51] Int. Cl B2ld 51/00 {58] Field Of Search t. 225/94. 96, 96.5; 29/413;
[56] References Cited UNITED STATES PATENTS 1,859,851 5/1932 Stiefel 72/100 2,014,203 9/1935 Herrmann t t 72/70 3,052,975 9/1962 Walters et al 29/413 3,138,308 6/1964 Oakley t t 225/965 3.515.326 6/1970 Saito et al 225/965 3,659,764 5/1972 Janiszewski 225/965 Primary lixuminerLowell A. Larson Attorney, Agent. or FirmSteinberg & Blake [57] ABSTRACT A method of dividing an elongated body of circular section into at least a pair of pieces. Initially the body has a circumferential groove formed in its exterior surface between its ends, and then the body is simultaneously rotated while being bent at the region of the groove so that the body breaks at the location of the groove to become thereby divided into at least a pair of pieces.
17 Claims. 7 Drawing Figures METHOD FOR DIVIDING AN ELONGATED BODY INTO SEPARATE PIECES BACKGROUND OF THE INVENTION The present invention relates to methods for dividing elongated bodies into a plurality of pieces.
For example. it is known that blooms or billets of circular section can be rolled from ingots in suitable roll ing mills such as mills for rolling such ingots into elongated steel bodies of circular section. Such blooms or billets must then be divided into pieces of suitable length for further treatment. Of course. the example of steel blooms or billets from a rolling mill is only illustrative. Thus it is possible also to achieve circular bar stock from a continuous casting machine, and in addition instead of solid bar stock it is necessary also to break elongated relatively thick-walled tubular stock into pieces having lengths rendering the pieces convenient for further treatment.
At the present time the methods utilized for dividing elongated bodies of the above type into smaller pieces have a number of drawbacks. For example it is known to cut the elongated bodies into pieces of desired length. Such cutting may be carried out according to a hot sawing process during which the elongated metal bodies such as billets are at an elevated-temperature while acted upon by rotating circular saws. It is. also possible to cold saw the elongated body at room temperature, utilizing a rotating circular saw for this purpose. It is also known to utilize a shearing process for cutting the elongated body by the shearing action of suitable cutting tools, and in addition it is known to cut the elongated body into predetermined lengths by a gas cutting process where oxygen and a suitable combustible gas are utilized to cut through the body.
All of these known methods have serious disadvantages not the least of which includes the fact that such known methods unavoidably result in pieces which have rough ends provided with burrs, fins, and the like which must be removed subsequent to the separating of the elongated body into the shorter pieces. In addition, most of the cutting methods will result in the formation of chips or shavings which must be removed and which waste the material. Thus, the conventional cutting methods such as the hot sawing process results in the formation of burrs and in addition creates a short operating life for the saw itself, while at the same time creating undesirable noise of operation and a considerable amount of chips, the latter being determined by the thickness of the saw blade. Of course. the formation of the chips results in a decrease in the lengths of the pieces which can be achieved from a given body.
Of course, the cold sawing process has the same disadvantages as the hot sawing process in addition to requiring a greater length of time for the cutting operation, as compared with hot sawing. With respect to the method of cutting elongated bodies on a shearing machine, this method has the drawback of causing distortions as well as creating burrs, fins, or undesirably shaped ends on the resulting pieces. In this latter connection, the shearing meachines very often compress the ends of the pieces undesirably so that they have a tapered configuration which must be eliminated.
Utilization of gas for cutting through the body with a flame has the disadvantage of requiring a longer time than other methods while such a method also results in considerable waste of the metal which melts away from the original body with this method also resulting in rough ends having burrs or the like which must be eliminated.
SUMMARY OF THE INVENTION It is accordingly a primary object of the present invention to provide a method which will avoid the above drawbacks.
In particular it is an object of the present invention to provide a method for dividing an elongated body of circular section into separate pieces in such a way that there will be no burrs. fins, or the like which must be removed and also in such a way that the separation of the elongated body into the separate pieces can take place rapidly and conveniently with a minimum amount of noise and with a high degree of efficiency.
A more specific object of the present invention is to provide a method of this type which is capable of dividing the elongated body into separate pieces while continuously feeding the body longitudinally.
A specific object of the present invention is to provide a method which makes it possible to break the body into the pieces of predetermined length.
According to the method of the invention, an elongated body of circular section is divided into at least a pair of pieces by first forming a circumferential groove in the exterior surface of the body between the ends thereof and thereafter rotating the body around its longitudinal axis while simultaneously bending the body at the region of the circumferential groove so that the body breaks at the location of the groove, thus achieving in this way pieces of predetermined length.
BRIEF DESCRIPTION OF DRAWINGS The method of the invention is illustrated by way of example in the accompanying drawings which form part of this application and in which:
FIG. 1 is a top plan view of a method according to the invention;
FIG. 2 is a side elevation of the method illustrated in FIG. 1;
FIGS. 3A-3C respectively illustrate different configurations of circumferential grooves;
FIG. 4 is a schematic illustration of an apparatus for forming circumferential grooves; and
FIG. 5 is a schematic plan view of the apparatus for operating the rolls of FIGS. 1 and 2.
DESCRIPTION OF PREFERRED EMBODIMENTS Referring to FIG. 1 of the drawings, it will be seen that an elongated body 1 is illustrated fragmentarily. This elongated body 1 is of a circular cross section and may, for example, take the form of a billet received from a rolling mill. Prior to reaching the stage of the method which is illustrated in FIG. 1, the elongated body 1 is formed at its exterior surface with a series of circumferential grooves 2, one of which is illustrated at the left portion of FIG. 1. These circumferential grooves may be formed in the body 1 in a manner described in greater detail below. The series of grooves 2 are longitudinally spaced from each other along the body 1 in accordance with the length of the pieces de sired. In other words the distance from one groove 2 up to the next groove 2 will correspond to the length of a desired piece which is to be broken from the elongated body 1.
When the elongated body reaches the stage of the method illustrated in FIG. 1 it travels between a pair of rotating rolls 3 and 4. The rolls 3 and 4 are of an elongated configuration with the roll 3 having a convex curved configuration between its opposed ends while the roll 4 has a concave curved configuration between its opposed ends, and the curvature of the exterior surface of the roll 4 is approximately the same as the curvature of the exterior surface of the roll 3. In other words while the roll 3 is convex and the roll 4 is concave, in a plane which contains the axis of the roll 3, the outer surface thereof will have a radius of curvature which will be approximately the same as the radius of curvature of the exterior surface of the roll 4 in a plane which contains the axis of the latter. Thus, the radii of curvature of the concave and convex rolls can be identical.
Moreover, it will be seen from FIG. 1 that the rolls 3 and 4 are oppositely inclined with each roll extending across the elongated body 1. When projected on to the plane of FIG. 1, the axes of the rolls 3 and 4 respectively form with the axis of the body 1 equal angles 0. The axis of the elongated body 1 coincides with the direction of feed thereof. However, in so far as the elongated body 1 is fed smoothly, it is not always necessary that the axes of the rolls 3 and 4 form equal angles with the axis of the body I.
As is apparent from the acurate arrows illustrated in FIGS. 1 and 2, the pair of rolls 3 and 4 rotate in the same direction while the elongated body 1 which travels between the rolls 3 and 4 rotates in a direction op posite from the direction of rotation of the rolls 3 and 4.
As a result of the above-described configuration of the rolls 3 and 4, they act not to axially feed or advance the body 1 to the right, as shown by the horizontal arrow at the right of FIG. 2, but in addition while the body I travels longitudinally between the rolls 3 and 4, the body I is rotated about its axis and is bent in the manner indicated in FIG. 2. Thus, the rotating rolls 3 and 4 serve to pull the body I to the right, as viewed in FIG. 2, while simultaneously bending and rotating the body I.
With this arrangement if the peripheral rotary speed of the rolls 3 and 4 is Vm/min and the body 1 has a rotating speed of V then:
V V sin 0 When part of the body 1 formed with the circumferential groove 2 is situated between the rolls 3 and 4 in the above manner, the action of rotation and bending to which the body 1 is subjected at this time results in stresses due to rotation and bending with these stresses being concentrically imposed at the innermost part of the circumferential groove 2 so that the body 1 breaks apart at the location of the groove 2.
Of course, the actual breaking off ofa piece from the body 1 occurs when the breaking location has advanced somewhat beyond the centers of the rolls 3 and 4, so that the next portion of the body I is already pressed between the rolls 3 and 4 to be axially fed thereby, and in this way the body 1 is continuously fed in an axial or longitudinal direction by the rolls 3 and 4 so that the next circumferential groove 2 will automatically progress up to the location between the rolls 3 and 4 where the next breaking will occur as a result of the above action.
FIGS. 3A3C respectively illustrate various possible cross-sectional configurations for the circumferential grooves 2. Thus, FIG. 3A illustrates that the circumferential groove 2 may have a rectangular cross section while FIGS. 3B and 3C respectively illustrate that the circumferential groove 2 may have a V-shaped cross section. However it will be noted that in FIG. 3B the circumferential groove 2 is defined by a pair of side surfaces which sharply intersect each other while in the case of FIG. 3C the oppositely inclined side surfaces of the circumferential groove 2 intersect at an inner rounded end surface of the circumferential groove 2.
The circumferential grooves can be formed in the exterior surface of the body 1 in a number of different ways. For example, rotary dies similar to those used in roll-threading methods may be used. Also it is possible to cut the grooves with a suitable cutting tool or milling cutter. In addition it is possible to form the circumferential grooves with a saw or a flame from a gasoperated cutting apparatus may be used to form the grooves. Again, it is more preferable to form grooves in the exterior surface of the body 1 without giving a rotary motion thereto by pressing at least one rotary die or cutter into the surface of the body 1 or by moving a cutter in reciprocating motion around the circumference of the body 1.
However, of all of the above different possible methods for forming the grooves, the use of rotary dies is superior with respect to the output, length of operating life of the tools, and the like.
It has been found from experience that a circumferential groove of V-shaped cross section as illustrated in FIGS. 38 and 3C will produce very good results. and while the angle of the V-groove should be taken into consideration, a depth of the groove on the order of 0.5 mm has proved to be sufficient to result in the breaking off of the piece from the elongated body I.
One of the structures for forming each of the circumferential grooves is schematically represented in FIG. 4. Thus, referring to FIG. 4 it will be seen that a suitable supporting structure or base 7 carries a pair of rotary driving rolls 5 and 6 on which the elongated body 1 is supported. Thus, in response to rotation of the rolls 5 and 6 the body 1 will be rotated about its axis. The rolls 5 and 6 are of course parallel to each other. The base 7 carries a standard 12 on which a lever 11 is pivoted, the lever l 1 being pivoted intermediate its ends as illustrated. At its right end, the lever 11 swingably carries a bracket 10 on which a pair of dies 8 and 9 are supported for rotary movement. Thus, the pair of dies 8 and 9 are located in a common plane and have peripheral edges of V-shaped cross section, for example. The base 7 carries a hydraulic mechanism 13 in the form of a cylinder having in its interior a piston whose piston rod is pivotally connected to the left end of the lever l l, as illustrated in FIG. 4. Thus, when the piston is retracted downwardly to the dot-dash line position shown for its upper end in FIG. 4, the lever II is raised at its right end so. that the dies 8 and 9 do not engage the body I. On the other hand, when the hydraulic fluid is introduced under pressure into the cylinder of the system 13, the lever 11 will be pushed to the solid-line position where the peripheries of the dies 8 and 9 press into the exterior surface of the rotating body 1 to form the circumferential groove 2 therein. Of course, after one groove is completed the dies 8 and 9 are raised and the body 1 is axially advanced through the desired axial distance and then the next groove is formed.
FIG. 5 schematically illustrates the structure operatively connected to and associated with the rolls 3 and 4 described above. This structure associated with the rolls 3 and 4 includes a stand or supporting framework 17 in front of which is located a front table 14 and at the rear of which is located a rear table 15, the body 1 advancing from the front table 14 through the space between the rolls 3 and 4 and the broken off pieces being received by the table 15. These tables may take the form of plates supporting rollers on which the work freely moves.
The framework or support means 17 for the rollers 3 and 4 includes not only bearings for supporting the pair of rollers 3 and 4 but also an adjusting mechanism 16 in the form of vertically extending screw members rotatable in nuts carried by that part of the frame 17 which supports at least one of the rolls 3 and 4, so that in this way the vertical spacing or elevation of the rolls 3 and 4 one with respect to the other can be adjusted. The bearings of the support means 17 are situated in such a way that the rolls 3 and 4 are inclined with respect to each other as illustrated.
The drive means for the rolls includes a pair of reduction gear units 19 respectively connected operatively with driving motors 18. The outputs of the gear reduction units 19 are respectively delivered to the rolls 3 and 4 through rotary drive shafts 21 connected through suitable universal joints on the one hand with the rolls 3 and 4 and on the other hand with the reduction units 19.
Of course, the structure shown in FIG. 4 for forming circumferential grooves is situated in advance of the front table 14 so that the elongated body 1 is already provided with the circumferential grooves 2 when it is delivered to the space between the rolls 3 and 4.
It is thus apparent that with the method of the invention it is possible to break off pieces from an elongated body of circular section in a highly effective manner far superior to what has heretofore been possible. All that is required is to initially form the elongated body 1 with the circumferential grooves 2 at the locations where the breaking is to occur. According to the method of the invention during the axial feeding between the rolls 3 and 4 the elongated body 1 is simultaneously rotated and bent, so that the stresses due to the bending and rotation are concentrated at the innermost part of the circumferential groove to bring about in this way the breaking off of pieces from the body 1. The pieces which break off have smooth ends.
Therefore, in contrast with previously known methods, the method of the invention has the advantage of an improved output inasmuch as there are no chips or shavings which form a waste material, and the pressing of the circumferential grooves further contributes to this advantage. With conventional cutting operations, hot and cold sawing will provide scrap throughout the cross section of the work through a length on the order of 8-l0 mm, while with gas cutting methods the waste material also is determined by the thickness of the work and at each cutting operation a length of l5-20 mm of the work material is wasted.
Further advantages resulting from the invention reside in the fact that since the breaking occurs at the 10- cation of the initially formed circumferential grooves as a result of the simultaneous rotation and bending, there are no deformed ends on the resulting pieces. Thus, the pieces broken off from the body with the method ofthe invention do not have fins, burrs, or the like which must be removed, and the ends are not mashed or otherwise tapered or flattened in an undesired manner. as is commonly encountered with conventional methods.
In addition, there is very little noise involved with the method of the invention and sparks or the like are not generated, so that the entire operation is far more comfortable for the personel and far less dangerous.
In addition, since the dies, such as the dies 8 and 9 for forming the circumferential grooves, are required only to make an extremely shallow groove on the work and are not used for cutting through the work, the operating life of the groove-forming dies is extremely long.
In addition, since it is possible to form these circumferential grooves on the elongated bodies while they are longitudinally fed, both the formation of the circumferential grooves and the breaking operations can go forward during continuous feeding of the work with an exceedingly high output achieved in this way so that a highly effective method is achieved. In this latter connection it is of course a simple matter to mount the base 7 shown in FIG. 4 on suitable guides such as suitable tracks with a spring and stop arrangement being used to determine the initial position of the base 7 while during formation of the circumferential groove it is possible for the base 7 to move with the work as it is axially fed between the rolls 3 and 4, and of course when a circumferential groove is completed the base 7 would be returned by a spring to its initial location and the lever 11 actuated to form the next circumferential groove. In this way, the feeding achieved from the rotary rolls 3 and 4 would be used not only for feeding the circumferential grooves sequentially to the space between the rolls 3 and 4 to bring about the breaking off results referred to above, but in addition this feeding would be used to feed the work with respect to the grooveforming dies. Thus a highly efficient method can be achieved with the invention.
While reference has been made above to elongated bodies 1 in the form of billets or blooms, in the case of relatively large diameter bodies, it is of course to be understood that the body 1 need not be solid. Thus it is also possible to apply the present invention to a tubular elongated body of medium diameter which has a relatively thick wall.
What is claimed is:
1. In a method of dividing an elongated body of circular section into a plurality of pieces, the steps of forming a plurality of circumferential grooves in the exterior surface of the elongated body between the ends thereof while spacing the circumferential grooves one from the next in accordance with desired lengths of the pieces into which the elongated body is to be divided, sequentially bending the body at the region of sequential grooves thereof while simultaneously rotating the body around its longitudinal axis for breaking the body at the locations of said grooves, and longitudinally feeding the body while simultaneously rotating and bending the latter so that the body is continuously fed and successively broken at successive grooves.
2. In a method as recited in claim I and including the step of acting on the body with a pair of rolls one of which has an elongated exterior surface of convex configuration and the other of which has an elongated surface of concave configuration with said rolls respectively having oppositely inclined axes which are respectively inclined with respect to the axis of said longitudinal body, while the latter travels between said rolls to be rotated, bent, and longitudinally fed by the action of said rolls.
3. In a method as recited in claim 2 and wherein said rolls have their axes respectively inclined at the same angle with respect to the longitudinal axis of said body.
4. In a method as recited in claim 2 and wherein the angles of said rolls with respect to the longitudinal axis of the body are respectively determined with the condition that the body is fed in the longitudinal direction thereof while being rotated by the rotary motion of said rolls.
5. In a method as recited in claim 3 and wherein the circumferential grooves are initially formed in the body prior to travel of the latter between the rolls.
6. In a method as recited in claim 3 and wherein the circumferential grooves are formed in the body simultaneously with the longitudinal movement of the latter between the rolls.
7. In a method as recited in claim I and wherein said body is made of metal.
8. In a method as recited in claim 1 and wherein the body is solid.
9. In a method as recited in claim 1 and wherein the body is tubular.
10. In a method as recited in claim 1 and wherein the body is made of steel.
11. In a method as recited in claim 1 and wherein said groove is of a rectangular cross section.
12. In a method as recited in claim 1 and wherein said groove is of a V-shaped cross section.
13. In a method as recited in claim 12 and wherein said groove has a rounded inner end surface area situated between opposed side surfaces of said groove.
14. In a method as recited in claim 1 and wherein the body is rotated while at least one die is simultaneously pressed into the surface of the body to form the circumferential groove therein.
15. In a method of dividing an elongated body of circular section into at least a pair of pieces, the steps of forming a circumferential groove in the exterior surface of the body between the ends thereof, and rotating the body around its longitudinal axis while simultaneously bending the body at the region of said circumferential groove for breaking the body at said circumferential groove, the body being engaged by only a pair of opposed rotating rolls one of which is of a convex configuration and the other of which is of a concave configuration with said rolls acting on the body to simultaneously rotate and bend the latter, said rolls being inclined with respect to each other and with respect to the longitudinal axis of said body with the angles of said rolls with respect to the axis of the body being respectively determined with the condition that the body is fed in the longitudinal direction thereof while being rotated by the rotary motion of said rolls.
16. In a method as recited in claim 15 and wherein said rolls are inclined with respect to each other and with respect to the longitudinal axis of said body with the of said rolls being inclined at the same angle with respect to the axis of said body.
17. In a method as recited in claim 15 and wherein said groove has a pair of opposed oppositely inclined surfaces which sharply intersect each other.
Claims (17)
1. In a method of dividing an elongated body of circular section into a plurality of pieces, the steps of forming a plurality of circumferential grooves in the exterior surface of the elongated body between the ends thereof while spacing the circumferential grooves one from the next in accordance with desired lengths of the pieces into which the elongated body is to be divided, sequentially bending the body at the region of sequential grooves thereof while simultaneously rotating the body around its longitudinal axis for breaking the body at the locations of said grooves, and longitudinally feeding the body while simultaneously rotating and bending the latter so that the body is continuously fed and successively broken at successive grooves.
2. In a method as recited in claim 1 and including the step of acting on the body with a pair of rolls one of which has an elongated exterior surface of convex configuration and the other of which has an elongated surface of concave configuration with said rolls respectively having oppositely inclined axes which are respectively inclined with respect to the axis of said longitudinal body, while the latter travels between said rolls to be rotated, bent, and longitudinally fed by the action of said rolls.
3. In a method as recited in claim 2 and wherein said rolls have their axes respectively inclined at the same angle with respect to the longitudinal axis of said body.
4. In a method as recited in claim 2 and wherein the angles of said rolls with respect to the longitudinal axis of the body are respectively determined with the condition that the body is fed in the longitudinal direction thereof while being rotated by the rotary motion of said rolls.
5. In a method as recited in claim 3 and wherein the circumferential grooves are initially formed in the body prior to travel of the latter between the rolls.
6. In a method as recited in claim 3 and wherein the circumferential grooves are formed in the body simultaneously with the longitudinal movement of the latter between the rolls.
7. In a method as recited in claim 1 and wherein said body is made of metal.
8. In a method as recited in claim 1 and wherein the body is solid.
9. In a method as recited in claim 1 and wherein the body is tubular.
10. In a method as recited in claim 1 and wherein the body is made of steel.
11. In a method as recited in claim 1 and wherein said groove is of a rectangular cross section.
12. In a method as recited in claim 1 and wherein said groove is of a V-shaped cross section.
13. In a method as recited in claim 12 and wherein said groove has a rounded inner end surface area situated between opposed side surfaces of said groove.
14. In a method as recited in claim 1 and wherein the body is rotated while at least one die is simultaneously pressed into the surface of the body to form the circumferential groove therein.
15. In a method of dividing an elongated body of circular section into at least a pair of pieces, the steps of forming a circumferential groove in the exterior surface of the body between the ends thereof, and rotating the body around its longitudinal axis while simultaneously bending the body at the region of said circumferential groove for breaking the body at said circumferential groove, the body being engaged by only a pair of opposed rotating rolls one of which is of a convex configuration and the other of which is of a concave configuration with said rolls acting on the body to simultaneously rotate and bend the latter, said rolls being inclined with respect to each other and with respect to the longitudinal axis of said body with the angles of said rolls with respect to the axis of the body being respectively determined with the condition that the body is fed in the longitudinal direction thereof while being rotated by the rotary motion of said rolls.
16. In a method as recited in claim 15 and wherein said rolls are inclined with respect to each other and with respect to the longitudinal axis of said body with the of said rolls being inclined at the same angle with respect to the axis of said body.
17. In a method as recited in claim 15 and wherein said groove has a pair of opposed oppositely inclined surfaces which sharply intersect each other.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8407672A JPS5142349B2 (en) | 1972-08-24 | 1972-08-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3866449A true US3866449A (en) | 1975-02-18 |
Family
ID=13820378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US38728073 Expired - Lifetime US3866449A (en) | 1972-08-24 | 1973-08-10 | Method for dividing an elongated body into separate pieces |
Country Status (5)
Country | Link |
---|---|
US (1) | US3866449A (en) |
JP (1) | JPS5142349B2 (en) |
DE (1) | DE2342145A1 (en) |
FR (1) | FR2196870B1 (en) |
GB (1) | GB1404102A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4203539A (en) * | 1978-10-23 | 1980-05-20 | The Boeing Company | Method and apparatus for cutting optical fibers |
US4216004A (en) * | 1976-11-01 | 1980-08-05 | U.S. Philips Corporation | Method of breaking optical fibers |
US4545515A (en) * | 1984-07-06 | 1985-10-08 | Fletcher-Terry Corporation | Sheet cutting machine |
US5201117A (en) * | 1991-11-04 | 1993-04-13 | General Motors Corporation | Method and apparatus for sizing and cutting tubing |
US5407116A (en) * | 1989-10-04 | 1995-04-18 | Zexel Corporation | Method and apparatus for cutting flat tubes |
US10656335B2 (en) | 2018-07-18 | 2020-05-19 | International Business Machines Corporation | Cleaving fibers of differing composition |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10053863C1 (en) * | 2000-10-27 | 2002-02-07 | Hans Ernst Weerth | Pipe cutting assembly has clamping chucks for the feed and cut pipe sections, with a cutting roller moving around the pipe leaving a strap to be fractured by bending the cut length by its chuck |
JP5349926B2 (en) * | 2008-12-01 | 2013-11-20 | 昭和電工株式会社 | Pipe cutting method and photosensitive drum substrate manufacturing method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1859851A (en) * | 1931-08-03 | 1932-05-24 | Ralph C Stiefel | Straightening machine |
US2014203A (en) * | 1934-03-22 | 1935-09-10 | Karl L Herrmann | Machine for forming roller blanks |
US3052975A (en) * | 1957-09-05 | 1962-09-11 | John C Walters | Method of severing metal articles |
US3138308A (en) * | 1961-05-08 | 1964-06-23 | Oakley Indusatries Inc | Tube cutting apparatus |
US3515326A (en) * | 1968-05-17 | 1970-06-02 | Hachiro Saito | Apparatus for cutting of steel bars |
US3659764A (en) * | 1970-03-16 | 1972-05-02 | Kasimir Janiszewski | Method and apparatus for severing cylindrical stock |
-
1972
- 1972-08-24 JP JP8407672A patent/JPS5142349B2/ja not_active Expired
-
1973
- 1973-08-10 US US38728073 patent/US3866449A/en not_active Expired - Lifetime
- 1973-08-10 GB GB3793373A patent/GB1404102A/en not_active Expired
- 1973-08-21 DE DE19732342145 patent/DE2342145A1/en active Pending
- 1973-08-23 FR FR7330596A patent/FR2196870B1/fr not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1859851A (en) * | 1931-08-03 | 1932-05-24 | Ralph C Stiefel | Straightening machine |
US2014203A (en) * | 1934-03-22 | 1935-09-10 | Karl L Herrmann | Machine for forming roller blanks |
US3052975A (en) * | 1957-09-05 | 1962-09-11 | John C Walters | Method of severing metal articles |
US3138308A (en) * | 1961-05-08 | 1964-06-23 | Oakley Indusatries Inc | Tube cutting apparatus |
US3515326A (en) * | 1968-05-17 | 1970-06-02 | Hachiro Saito | Apparatus for cutting of steel bars |
US3659764A (en) * | 1970-03-16 | 1972-05-02 | Kasimir Janiszewski | Method and apparatus for severing cylindrical stock |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4216004A (en) * | 1976-11-01 | 1980-08-05 | U.S. Philips Corporation | Method of breaking optical fibers |
US4203539A (en) * | 1978-10-23 | 1980-05-20 | The Boeing Company | Method and apparatus for cutting optical fibers |
US4545515A (en) * | 1984-07-06 | 1985-10-08 | Fletcher-Terry Corporation | Sheet cutting machine |
US5407116A (en) * | 1989-10-04 | 1995-04-18 | Zexel Corporation | Method and apparatus for cutting flat tubes |
US5495972A (en) * | 1989-10-04 | 1996-03-05 | Zexel Corporation | Method and apparatus for cutting flat tubes |
US5201117A (en) * | 1991-11-04 | 1993-04-13 | General Motors Corporation | Method and apparatus for sizing and cutting tubing |
US10656335B2 (en) | 2018-07-18 | 2020-05-19 | International Business Machines Corporation | Cleaving fibers of differing composition |
Also Published As
Publication number | Publication date |
---|---|
FR2196870A1 (en) | 1974-03-22 |
FR2196870B1 (en) | 1976-04-30 |
JPS5142349B2 (en) | 1976-11-15 |
JPS4939891A (en) | 1974-04-13 |
GB1404102A (en) | 1975-08-28 |
DE2342145A1 (en) | 1974-03-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3333452A (en) | Reduction of thick flat articles | |
US3866449A (en) | Method for dividing an elongated body into separate pieces | |
EP3812056A1 (en) | Medium/small-diameter thick-walled metal tube and preparation method therefor | |
US3719066A (en) | Piercing rolling apparatus for producing rolled material free from surface torsion | |
US3590674A (en) | Restrained shearing method of bar material | |
US2054311A (en) | Interior bead trimmer | |
US3613489A (en) | Method and apparatus for severing tubes | |
US4445354A (en) | Procedure and equipment for the manufacture of pipes with external and internal diameters varying in stages | |
US3173318A (en) | Method and apparatus for producing pipes of shorter lengths from a continuously produced pipe | |
US4255956A (en) | Rolling mill sizing apparatus | |
JPH06155140A (en) | Method and device for cutting cold pilger rolled pipe into shortened length | |
US3659764A (en) | Method and apparatus for severing cylindrical stock | |
US2099497A (en) | Guide for tube rolling mills | |
US3260090A (en) | Method and apparatus for reducing tubing | |
US1669264A (en) | Billet-surfacing machine | |
GB1392581A (en) | Friction welding machine | |
US3724302A (en) | Method and apparatus for severing tubes | |
RU2221667C1 (en) | Apparatus for cutting wire by blanks | |
US2202898A (en) | Pipe welding | |
RU2659559C1 (en) | Method for profiling of back end of cylindrical pipe blank for rolling in three-wave roll mills | |
US3142228A (en) | Method and machine for scalping metal rod stock | |
CN101214525A (en) | Device and method for fast pressing ring-shaped parts without butcher cuts | |
US3756055A (en) | Apparatus for rolling workpieces | |
US3535900A (en) | Apparatus for removing material from cylindrical workpieces | |
US1033569A (en) | Method of manufacturing rifled pipes. |