US3844152A - Continuous drawing bench - Google Patents

Continuous drawing bench Download PDF

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Publication number
US3844152A
US3844152A US00326236A US32623673A US3844152A US 3844152 A US3844152 A US 3844152A US 00326236 A US00326236 A US 00326236A US 32623673 A US32623673 A US 32623673A US 3844152 A US3844152 A US 3844152A
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US
United States
Prior art keywords
carriage
jaws
crank
connecting rod
bench
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
US00326236A
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English (en)
Inventor
P Peytavin
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.)
Vallourec Usines a Tubes de Lorraine Escaut SA
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Vallourec Usines a Tubes de Lorraine Escaut SA
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Publication of US3844152A publication Critical patent/US3844152A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes
    • B21C1/20—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes from stock of essentially unlimited length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, wire, rods, tubes or like semi-manufactured products by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by means other than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, rods or tubes
    • B21C1/27—Carriages; Drives
    • B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive

Definitions

  • ABSTRACT U-S. Ben h for drawing elongated material through a 226/112 226/164 comprises a plurality of carriages, each carrying a pair Cl. f jaws fo the material and crank and con- Field of Search 72/287, 233, 289, necting rod means for actuating said carriages to sue- 72/291; 226/112 163 cessively advance the material through the die.
  • Continuous drawing benches are machines for drawing a product such as a wire or a rod through a die to calibrate the section of the product and straighten it. They make it possible to exert traction on the product as it passes through the die without interruption.
  • the wire or like product Before entering the drawing bench the wire or like product is generally wound up in a coil of substantial length. At the output of the machine the product is cut into sections of predetermined length.
  • the pairs of jaws are supported on carriages which slide on slideways mounted on the framework of the machine, each carriage having its movement controlled by a cam on a drum which rotates about an axis of rotation parallel to the direction in which the wire is drawn.
  • the drum carrying the cams must be rather large, even though the carriages are not advanced over a very long path of travel. This makes it necessary to have a rather high frequency of reciprocation of the carriages in order to have a high enough drawing speed. This results in parasitic forces due to the substantial inertia which forces are supported by the cams and limit the maximum drawing speed to about 60 meters a minute.
  • the present invention relates to a drawing bench in which the movement of the jaws is controlled solely by rotating pivoted members. This results in a mechanically simplified construction and leads to the possibility of operating the drawing bench according to the invention at a speed substantially higher than those of benches heretofore known.
  • the construction of the drawing benches according to the invention utilizes components made on a large scale as ordinary articles of commerce, such as roller bearings and universal joints, thus avoiding the long and expensive machining processes heretofore necessary to manufacture the cam-carrying drums in the prior art machines.
  • three jaw-carrying carriages are used, which are controlled by cranks angularly spaced at
  • means are used conjointly with the crank and connecting rod system means which make it possible to impart to each carriage a constant or substantially constant linear speed during the portion of its movement during which it exerts traction on the product to be drawn.
  • a particularly advantageous means for this purpose consists of a universal joint which is positioned between the shaft supporting the crank and the shaft which drives this crank with an angular spacing between the two shafts of the universal joint.
  • the crank may be driven at a constant angular speed and a linear displacement to the carriage during a part of its course because of the fact that the connecting rod connecting the carriage to the crank is made in two parts pivoted at a common point which is itself connected by a connecting rod to another crank rotating in synchronism with the first one.
  • the angular displacement of the connecting rod with respect to the carriage which it drives is used to insure automatic control of the opening and closing of the jaws which grip the product to be drawn.
  • a crank may then be used which is fixed to the connecting rod and positioned at a point at which this connecting rod is pivotally attached to the carriage so as to control the movements of the jaws with respect to the carriage through a linkage system.
  • the linkage used advantageously comprises a composite link positioned between two articulated levers which may be elastically elongated by compression of a spring, and one of the ends of which is axially slidable at its point of attachment to one of the levers so that said lever may freely assume a position which, at certain moments, corresponds to the minimum length of the composite link.
  • This articulation may be easily provided by providing on the end of the connecting rod a stop situated beyond the point of attachment to the oscillating lever inside which the rod must slide and pivot.
  • FIG. 1 is a schematic perspective view of a device for driving a carriage according to the invention
  • FIG. 2 is a schematic longitudinal sectional view through a drawing bench according to the invention.
  • FIG. 3 is a sectional view on a larger scale taken through the bench of FIG. 2;
  • FIGS. 4-7 are schematic views representing the four stages of operation of the control for the jaws in the apparatus according to the invention.
  • FIG. 8 is a diagram representing the displacement of the carriage as a function of the angular position of the constant speed shaft which drives the crank through a universal joint.
  • the framework 1 carries at its upper part three carriages 2 slidable in slideways schematically represented on FIG. 2. Each carriage 2 is connected at 3 to one end of a connecting rod 4 the other end of which is pivotally connected to a crank 6 which is rotated about a shaft 7.
  • the three cranks 6 are angularly spaced 120 from each other, that is to say, the cranks are regularly angularly spaced.
  • a frame 8 is schematically shown at the left of FIG. 2 and supports the dies through which the wire 9 which is to be drawn must pass.
  • FIG. 1 schematically shows the various components which are necessary to control a single carriage 2, including the crank 6 pivotally attached at to the connecting rod 4, which is pivotally attached at 3 to the carriage 2.
  • the figureclearly shows the slideway 10 on which the carriage 2 travels.
  • FIG. 1 also shows how the jaws 11 and 11' are mounted on the carriage in a conventional manner. These jaws have a sufficient length to be able to grip the wire 9 which is to be drawn without exerting thereon a pressure so great as to risk deforming the product which is to be drawn. They have in a conventional manner a trapezoidal section to assure their closing when they move toward the left with respect to thecarriage 2 (as shown in FIG. 1).
  • Balls or rollers are positioned between the lateral sides of the jaws and their mounting on the carriage so as to permit relative sliding at low friction, which insures reliable, easy gripping and release of the jaws.
  • FIG. 1 shows the universal joint 12 through which the crank 6 is rotatably driven from a shaft 13 through reduction gearing 14.
  • the shaft 13 simultaneously drives the three cranks 6- through three reduction gears 14 and three universal joints 12.
  • Each universal joint occupies the same angular position with respect to the crank 6 which it controls.
  • the universal joint 12 may modify the angular speed of the crank 6 so as to produce a constant speed of the carriage during its working stroke.
  • FIG. I shows schematically how the device according to the invention assures the automatic control of the opening and closing of the jaws 11 and 11'.
  • a crankpin 15 fixed to the connecting rod 4 is pivotally attached at 16 to a composite link 17, the other end of which is mounted at 18 on the end of a lever 19, which lever 19 oscillates about a central point 20.
  • the other end 21 of the lever 19 is connected to two rods 22 and 22' pivotally attached at 23 and 23' to the jaws l1 and 11'.
  • the composite link 17 comprises a rod 24 slidable inside a cylinder 25 which is itself pivotally attached at 16 to the crankpin 15.
  • the rod 24 carries at its right end a piston 26 which slides in the cylinder 25 and is constantly urged toward the bottom of the cylinder by a compression spring 27.
  • the rod 24 is slidable and pivotable in its mounting 18 on the swinging lever 19. As may be seen on FIG. 1, the rod 24 has at one end a stop 28 which bears at 18 on the lever 19 when the angular motion of the crankpin draws the point 16 to the right.
  • FIG. 3 shows on a larger scale the different components which have just been described.
  • the principal axes of rotation or pivotal motion are mounted in ball or roller bearings which insure a great accuracy in the drive and permit a high speed of rotation and consequently high speed drawing of the wire being drawn.
  • FIGS. 4-7 show four consecutive phases in the movement of a carriage.
  • crank 6 reaches an angular position at which it moves the point 16 on the crankpin 15 toward the right into a position such that the stop 28 on the rod 24 bears on the swinging lever 19.
  • FIG. 5 shows an intermediate step in which the composite link 17 is elongated by compression of the spring 27, which insures a gripping pressure on the jaws and at the same time permits the crank 6 to pass to a vertical position which corresponds to the maximum displacement of the point 16 to the right.
  • FIG. 6 shows the position of the different parts at the moment at which the carriage is about to release the wire.
  • the point 16 at the end of the crank pin 15 is sufficiently displaced to the left in the direction of the carriage for the spring 27 to have completely depressed the piston 26 into the bottom of the cylinder.
  • the stop 28 on the rod 24 still abuts against the swinging lever 19.
  • FIG. 7 shows a position during thereturn of the carriage toward the left. In this position the jaws have been opened and the stop 28 of the rod 24 is spaced from the pivotal lever I9. After rotation through about a half a turn, the parts regain the position shown on FIG. 4.
  • FIG. 8 is a diagram showing along the ordinate the movements of the carriage as a function of the angular position of the shaft of the reducing gear 14 which is connected to the universal joint 12, and which is shown along the abscissa.
  • the abscissa can represent either the angle of rotation of the reduction gear or time. It will be noted that at 140 of rotation (from the graduation ID to the graduation 150) the displacement of the carriage is linear as a function of time, which corresponds to a constant speed which is that at which the wire 9 is driven.
  • the arrangement of the universal joint is such that the driven shaft undergoes an acceleration in the lower part of the straight line which represents the displacement of the carriage and a deceleration in the upper part of this straight line.
  • the sliding movement of the pivotal connection 3 on the carriage takes place along a straight line which is at a distance of 280 mm from the axis of rotation 7 of the crank (which is 0.8 times the length of the crank)
  • the universal joint I2 has an angular deviation of 45
  • the curve of FIG. 8 shows the beginning of the traction of a wire by a carriage as the point I and the end of this traction by the point II.
  • FIG. 8 also shows that the speed of the carriage decreases quite rapidly after the point II (to be reversed at the point VII), which creates a relative speed between the carriage and the jaws which facilitates or causes their opening.
  • each carriage is pivotally connected to one end of an individual connecting rod the other end of which is pivotally connected to an individual rotatably mounted crank, said drive system further comprising means causing said connecting rods to impart a substantially constant linear speed to each of said carriages during a part of the movement of that carriage during which the jaws mounted on that carriage exert traction on the material being drawn, and means driving all of said cranks synchronously, with each of said cranks being angularly spaced from the next crank by the same angular distance.
  • each connecting rod used to actuate a carriage is made in two parts pivotally connected to each other at a point which is connected by another rod to another crank driven in synchronism with the first crank.
  • Drawing bench as claimed in claim I in which the angular movement of each connecting rod with respect 7.
  • Drawing bench as claimed in claim 6 in which said linkage comprises a composite link positioned between two articulated levers, which link may be elongated by compressing a spring, one of the ends of said link being axially slidable in its point of attachment to one of the levers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Wire Processing (AREA)
US00326236A 1972-01-25 1973-01-24 Continuous drawing bench Expired - Lifetime US3844152A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7202377A FR2168880B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1972-01-25 1972-01-25

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US3844152A true US3844152A (en) 1974-10-29

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US00326236A Expired - Lifetime US3844152A (en) 1972-01-25 1973-01-24 Continuous drawing bench

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US (1) US3844152A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS529427B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DD (1) DD103570A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2168880B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1411914A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT978428B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3919874A (en) * 1974-06-17 1975-11-18 Gkn Screws Fasteners Ltd Heading machines
US3943743A (en) * 1973-05-03 1976-03-16 Schumag Schumacher Metallwerke Gesellschaft Mit Beschrankter Haftung Method and apparatus for controlling with increased accuracy a processing machine driven at varying operating speeds, such as a slide drawing machine, especially, as well as the slide drawing machine per se and auxiliary device
US4048833A (en) * 1974-12-19 1977-09-20 Kieserling & Albrecht Gripping arrangement
US4127999A (en) * 1974-12-19 1978-12-05 Th. Kieserling & Albrecht Gripping arrangement
US4182150A (en) * 1976-08-27 1980-01-08 Schumag Schumacher Metallwerke Carriage drawing machine for uniformly drawing and longitudinally severing elongated material to be drawn
US4406390A (en) * 1981-10-09 1983-09-27 Hamilton Joel A Continuous motion, constant velocity web feeding apparatus
US4478360A (en) * 1982-08-19 1984-10-23 Stephen Patkos Press Feeder
US4596174A (en) * 1984-12-28 1986-06-24 Gti Corporation Wire handling and cutting apparatus
US5540372A (en) * 1992-11-04 1996-07-30 Redaelli Tecna Meccanica S.P.A. Cam activated hydraulic drive with hydro-pneumatic accumulator
US20020189315A1 (en) * 2001-05-10 2002-12-19 Sms Meer Gmbh Method of drawing metal workpieces and drawing unit for a drawing machine
US20090013542A1 (en) * 2006-12-29 2009-01-15 Po-Lin Ho Drawing Machine
US12064824B1 (en) 2019-07-11 2024-08-20 HE&M Inc. Feed indexing for material handling apparatus and process therefor
CN119870183A (zh) * 2025-02-13 2025-04-25 常州同泰高导新材料有限公司 一种多头拉丝机及其工作方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT372312B (de) * 1978-02-13 1983-09-26 Mannesmann Ag Schlittenziehmaschine mit zwei in gleitbahnen am maschinenrahmen parallel zur ziehrichtung gefuehrten ziehschlitten

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US293167A (en) * 1884-02-05 Assigxoe of one-half to
US967178A (en) * 1905-10-17 1910-08-16 Thomas A Edison Tube-forming machine.
US1305343A (en) * 1919-06-03 Feeding devi c e for stay
US1664717A (en) * 1926-06-19 1928-04-03 Art Wire And Stamping Company Wire feeding and cutting machine
US2723117A (en) * 1949-04-05 1955-11-08 Clark George Frederick Strip material gripping and feeding devices for machines
US3487988A (en) * 1967-10-02 1970-01-06 Baird Corp Slide feed mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US293167A (en) * 1884-02-05 Assigxoe of one-half to
US1305343A (en) * 1919-06-03 Feeding devi c e for stay
US967178A (en) * 1905-10-17 1910-08-16 Thomas A Edison Tube-forming machine.
US1664717A (en) * 1926-06-19 1928-04-03 Art Wire And Stamping Company Wire feeding and cutting machine
US2723117A (en) * 1949-04-05 1955-11-08 Clark George Frederick Strip material gripping and feeding devices for machines
US3487988A (en) * 1967-10-02 1970-01-06 Baird Corp Slide feed mechanism

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3943743A (en) * 1973-05-03 1976-03-16 Schumag Schumacher Metallwerke Gesellschaft Mit Beschrankter Haftung Method and apparatus for controlling with increased accuracy a processing machine driven at varying operating speeds, such as a slide drawing machine, especially, as well as the slide drawing machine per se and auxiliary device
US3919874A (en) * 1974-06-17 1975-11-18 Gkn Screws Fasteners Ltd Heading machines
US4048833A (en) * 1974-12-19 1977-09-20 Kieserling & Albrecht Gripping arrangement
US4127999A (en) * 1974-12-19 1978-12-05 Th. Kieserling & Albrecht Gripping arrangement
US4182150A (en) * 1976-08-27 1980-01-08 Schumag Schumacher Metallwerke Carriage drawing machine for uniformly drawing and longitudinally severing elongated material to be drawn
US4406390A (en) * 1981-10-09 1983-09-27 Hamilton Joel A Continuous motion, constant velocity web feeding apparatus
US4478360A (en) * 1982-08-19 1984-10-23 Stephen Patkos Press Feeder
US4596174A (en) * 1984-12-28 1986-06-24 Gti Corporation Wire handling and cutting apparatus
US5540372A (en) * 1992-11-04 1996-07-30 Redaelli Tecna Meccanica S.P.A. Cam activated hydraulic drive with hydro-pneumatic accumulator
US20020189315A1 (en) * 2001-05-10 2002-12-19 Sms Meer Gmbh Method of drawing metal workpieces and drawing unit for a drawing machine
US6715332B2 (en) * 2001-05-10 2004-04-06 Sms Meer Gmbh Method of drawing metal workpieces and drawing unit for a drawing machine
US20090013542A1 (en) * 2006-12-29 2009-01-15 Po-Lin Ho Drawing Machine
US7661285B2 (en) * 2006-12-29 2010-02-16 Elite Machine And Design Ltd. Drawing machine
US12064824B1 (en) 2019-07-11 2024-08-20 HE&M Inc. Feed indexing for material handling apparatus and process therefor
CN119870183A (zh) * 2025-02-13 2025-04-25 常州同泰高导新材料有限公司 一种多头拉丝机及其工作方法

Also Published As

Publication number Publication date
IT978428B (it) 1974-09-20
JPS529427B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1977-03-16
DE2303322A1 (de) 1973-08-02
FR2168880B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1976-07-23
FR2168880A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-09-07
JPS4883060A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1973-11-06
DD103570A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-02-05
GB1411914A (en) 1975-10-29
DE2303322B2 (de) 1975-06-05

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