US3866449A - Method for dividing an elongated body into separate pieces - Google Patents

Method for dividing an elongated body into separate pieces Download PDF

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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
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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
Application number
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English (en)
Inventor
Senzo Wakabayashi
Akira Kusaba
Takayuki Koyano
Sukenori Nakano
Jin-Ichi Kimura
Akira Oyamada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Application granted granted Critical
Publication of US3866449A publication Critical patent/US3866449A/en
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Expired - Lifetime legal-status Critical Current

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    • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shearing Machines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Continuous Casting (AREA)
  • Forging (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US38728073 1972-08-24 1973-08-10 Method for dividing an elongated body into separate pieces Expired - Lifetime US3866449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8407672A JPS5142349B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-08-24 1972-08-24

Publications (1)

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US3866449A true US3866449A (en) 1975-02-18

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US38728073 Expired - Lifetime US3866449A (en) 1972-08-24 1973-08-10 Method for dividing an elongated body into separate pieces

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US (1) US3866449A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5142349B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2342145A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2196870B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1404102A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10053863C1 (de) * 2000-10-27 2002-02-07 Hans Ernst Weerth Verfahren und Vorrichtung zur Trennung eines Rohres
JP5349926B2 (ja) * 2008-12-01 2013-11-20 昭和電工株式会社 パイプの切断方法及び感光ドラム基体の製造方法

Citations (6)

* Cited by examiner, † Cited by third party
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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
DE2342145A1 (de) 1974-03-28
JPS5142349B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-11-15
JPS4939891A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-04-13
FR2196870A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-03-22
FR2196870B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-04-30
GB1404102A (en) 1975-08-28

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