US3693395A - Reciprocating carriage drawing machine - Google Patents

Reciprocating carriage drawing machine Download PDF

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Publication number
US3693395A
US3693395A US55092A US3693395DA US3693395A US 3693395 A US3693395 A US 3693395A US 55092 A US55092 A US 55092A US 3693395D A US3693395D A US 3693395DA US 3693395 A US3693395 A US 3693395A
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Prior art keywords
carriage
guideways
rack
stroke
pinion
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Expired - Lifetime
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US55092A
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English (en)
Inventor
Johann Greven
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Schumag Schumacher Metallwerke AG
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Schumag Schumacher Metallwerke AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/27—Carriages; Drives
    • B21C1/30—Drives, e.g. carriage-traversing mechanisms; Driving elements, e.g. drawing chains; Controlling the drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/27—Carriages; Drives
    • B21C1/28—Carriages; Connections of grippers thereto; Grippers

Definitions

  • ABSTRACT Reciprocating carriage drawing machine includes first guideways extending in a given drawing direction, a drawing carriage reciprocably mounted in the guideways, revolving cam means operatively connected to the drawing carriage for reciprocating the same along the first guideways, an intermediate carriage interposed between the drawing carriage and the cam means for lengthening the stroke of the drawing carriage, the intermediate carriage being also operatively connected to the cam means and being similarly reciprocable thereby in second guideways in the given drawing direction, and step-up transmission means for increasing the length of stroke of the drawing carriage comprising at least one axle carried by the intermediate carriage and extending substantially perpendicularly to the given drawing direction, a pinion loosely mounted on the axle and being in meshing engagement at one side thereof with a stationary rack and on the other side thereof with a rack slidable in third guideways paralled to the drawing direction, the slidable rack being coupled to the drawing carriage.
  • the invention relates to a reciprocating carriage drawing machine comprising at least one drawing carriage which is reciprocable by a revolving cam in ways in the machine frame parallel to the direction of drawmg.
  • lt is the object of the present invention so to contrive a reciprocating carriage type drawing machine of the first hereinabove specified kind in which at least one drawing carriage is reciprocable by a revolving cam in ways in the machine frame parallel to the direction of drawing, that without any change in the usual speed of the mainshaft, or the usual diameter of the cam, or the usual pitch of the cam, a drawing speed higher than heretofore obtainable can be achieved without adversely affecting the functional cooperation between the parts of the machine and the drawn stock.
  • 1 provide reciprocating carriage drawing machine comprising first guideways extending in a given drawing direction, a drawing carriage reciprocably mounted in the first guideways, revolving cam means operatively connected to the drawing carriage for reciprocating the same along the first guideways, an intermediate carriage interposed between the drawing carriage and the cam means for lengthening the stroke of the drawing carriage, the intermediate carriage being also operatively connected to the cam means and being similarly reciprocable thereby in second guideways in the given drawing direction, and step-up transmission means for increasing the length of stroke of the drawing carriage comprising at least one axle carried by the intermediate carriage and extending substantially perpendicularly to the given drawing direction, a pinion loosely mounted on the axle and being in meshing engagement at one side thereof with a stationary rack and on the other side thereof with a rack slidable in third guideways parallel to the drawing direction, the slidable rack being coupled to the drawing carriage.
  • the cam may be of the same diameter, its length may be the same and its pitch and speed may be as before. Consequently the intermediate carriage which is reciprocated by the cam moves in principle in exactly the same way and at the same speeds as the drawing carriage in the prior art reciprocating carriage machine. Assuming the above mentioned speed of revolution of the mainshaft of 66%r.p.m. the intermediate carriage will reciprocate at a speed cor responding to a drawing speed of about 60 meters per minute.
  • a conventional reciprocating carriage drawing machine comprising two drawing carriages and two cams and equipped according to the invention with two intermediate carriages, the cyclic operations and the available path lengths for deceleration, acceleration and speed equality between the carriages for performing these operations can provide a machine that performs just as reliably at a drawing speed of 120 meters/minute as a machine lacking intermediate carriages and operating at a drawing speed of only 60 meters/minute.
  • the proposed reciprocating carriage machine shares the advantage of the prior art reciprocating carriage machine of permitting the stock to be drawn continuously in a straight line with the highest possible precision.
  • a fixed rack may be provided on each side of the machine frame and two pinions which are mounted side by side in the intermediate carriage and of which one meshes with one of the two fixed racks and the second with the other of the fixed racks, may both mesh with a sliding rack which is located between the two pinions and which has rack teeth on each side for this purpose.
  • the sliding rack is guided in ways in the intermediate carriage.
  • the one-way coupling between the sliding rack and the drawing carriage couples only in the pulling direction.
  • This feature avoids static over-determination that might lead to jamming or wedging.
  • a particularly desirable feature of the proposed drawing machine comprises ways disposed in tiers for the drawing carriage and the intermediate carriage.
  • Yet another feature of the proposed drawing machine comprises the provision of pinions in the form of double pinions having different numbers of teeth on two pitch circles, of which one meshes with the fixed rack and the other with the sliding rack.
  • This form of pinion enables drawing speeds to be generated that are not double those but less than double those attainable in the described type of prior art drawing machines.
  • the increase in drawing speed may be only one and a half times the speed of the conventional machine.
  • This lower increase in drawing speed may be better when the stock has a diameter somewhat exceeding say mm, so that, on the one hand, it is desirable to have a drawing speed exceeding 60 meters/minute, whereas, on the other hand, the necessary pulling force would not be available if the step-up ratio were as high as 2 1.
  • this feature of providing double pinions in the proposed drawing machine may also be used to increase the stroke length of the sliding rack by more than 2 1. in such a case it may be advisable for the fixed racks to project inwardly sufficiently far from the frame to provide clearance for the accommodation of the larger diameter pitch circle of the double pinions in the machine frame.
  • a desirable arrangement in the proposed drawing machine comprises dividing the pinions and/or the racks in their median center planes and providing means for relatively shifting and locking the teeth of the two halves for the purpose of taking up backlash due to wear of the tooth flanks.
  • the cam flights in the propose reciprocating carriage drawing machine may be of the same form of construction as in the corresponding prior art reciprocating carriage drawing machines.
  • the cam has the form of a cylinder cam on a shaft (mainshaft) extending parallel to the direction of drawing, and in which the cam flight comprises screw or helical portions.
  • the cam flight projects from the cylinder and has two flanks.
  • One of the following rollers rides on each of these flanks and in the conventional drawing machine the two follower rollers are mounted in the drawing carriage.
  • One of the rollers transmits the working force for the actual draw.
  • the axle of this roller is fixed in the drawing carriage.
  • the other roller serves for transmitting the force during the return stroke and ensures that both rollers remain continuously in firm contact with the flanks of the cam flight.
  • the axle of this roller is fixed in the drawing carriage.
  • the other roller serves for transmitting the force during the return stroke and ensures that both rollers remain continuously in firm contact with the flanks of the cam flight.
  • the axle of this other roller is resiliently mounted inthe drawing carriage in the conventional prior art arrangement. Since the forces during the return stroke are much smaller than those required for the drawing stroke it is possible without difficulty to ensure that both rollers continuously maintain contact with both sides of the cam. Moreover, in the conventional drawing machine the center distance between the two rollers remains more or less constant during the passage of the cam flight between them.
  • cam may be adopted unchanged for use in the proposed drawing machine, excepting that the cam in the proposed machine will then cooperate with the intermediate carriage instead of with the drawing carriage.
  • the intermediate carriage in the proposed drawing machine will in such a case preferably be provided with the same kind of follower rollers as above described for cooperation with the flanks of the cam flights.
  • the roller for transmitting the drawing stroke will be mounted in fixed bearings and that for generating the return motion for keeping the two rollers in contact will be mounted in resiliently yielding bearings.
  • the present invention proposes to widen the cam flight at the reversal points on that side which faces away form the thrust transmitting roller.
  • the one-way coupling between the drawing carriage and the sliding rack should be at the trailing end of the rack when viewed in drawing direction.
  • FIG. I is a cross sectional view of the machine frame of my invention showing the drawing and intermediate carriages.
  • FIG. 2 is a plan view of the intermediate carriage, part of the fixed racks secured to the machine frame, and the sliding rack of the invention.
  • FIG. 3 is a fragmentary longitudinal section, on a smaller scale, of an intermediate carriage, part of the cam, the drawing and return rollers cooperating with the cam, the sliding rack and the one-way coupling between the sliding rack and the drawing carriage constructed according to the invention
  • FIG. 4 is a schematic side elevational view, on a still smaller scale, of the drawing machine according to the invention, for continuous drawing, showing two cam members, two intermediate carriages and two drawing carriages.
  • FIG. 5 is a fragmentary cross sectional view on a scale larger than that of FIGS. 1 and 2, showing a double pinion with different diameter pitch circles bearing different numbers of teeth of provide a transmission ratio in the direction of lengthening the stroke of the sliding rack beyond a ration of 2 l, and also showing the projecting disposition of a fixed rack.
  • FIGS. 6a and 6b are sectional views at an even larger scale of a divided pinion and adjusting means for relatively adjusting the gear teeth of the two halves for the purpose of taking up backlash due to wear.
  • FIG. L7 is a view form above, to a scale intermediate that of FIGS. 3 and 4, of a developed part of a cam flight on a cam member in which the cam flight in widened on the side remote from the drawing follower roller in the region of motion reversal of the intermediate carriage.
  • FIG. 1 shows the drawing carriage 10 mounted in ways 12 and the intermediate carriage 4 sliding in ways 11. Both pairs of ways are fixed in he machine frame 13. Likewise fixed in the machine frame 13 are stationary racks 8.
  • FIG. 1 also shows a roller 2 which cooperates with one flank of the cam flight on the cam cylinder 1.
  • Axle pins 76 mounted in the intermediate carriage carry pinions 5 which are loose on these axles.
  • the pinions mesh, on the one hand, with the stationary racks 8 and, on the other hand, with a movable rack 7 which is slidably mounted in ways in the intermediate carriage 4.
  • the pinions 5 roll on the stationary racks 8 and propel the movable sliding rack 7 a distance equal to twice the stroke of the intermediate carriage; cf. FIG. 2.
  • the proposed machine does not therefore require any change in the manner in which it is operated. It is also an advantage that the cams which cam in practice are proven thrust generating means can in principle be retained.
  • the operating frequency in the course of each cycle is the same in the proposed machine as in the corresponding conventional machine.
  • the transfer of the stock from one carriage to the other in the proposed machine proceeds within a path length of speed equality that is twice that available in the conventional machine. Consequently the proposed machine functionally ensures that the stock will be continuously drawn without jerks and irregularities.
  • the doubled length of the drawing stroke of both drawing carriages in the proposed drawing machine also has other advantages, namely in the context of the gripping of the stock by the jaws on the drawing carriages.
  • the pointed beak of the stock is gripped between the jaws of the first drawing carriage and pulled forward through the dieplate by the length of the stroke of the drawing carriage.
  • the entire length of the jaws of the first drawing carriage will already grip the surface of the stock, whereas in a corresponding conventional machine of the previously prescribed kind this will not be the case and the full length of the jaws will not yet come into contact with the drawn surface of the stock.
  • This is a particularly useful feature when drawing a tube stock.
  • the proposed drawing machine is used for drawing a tube stock the process of drawing-in is substantially improved by the doubling of the length of the drawing stroke.
  • axle pins 19 are provided in the intermediate carriage l8, and double pinions l7 and 17" are loosely mounted on these pins.
  • a rack 16 is affixed to project from the machine frame 15.
  • the pinion l7 meshes with this fixed rack 16, whereas the pinion 17" meshes with a rack 7 that is slidably mounted.
  • the length of the stroke of the rack 7 may be more than twice the length of the stroke of the intermediate carriage 18 by an amount equal to twice the ratio of the number of gear teeth of the tow two pinions l7 and 17". It will be understood that the projection of the rack 16 from the side of the framing provides the necessary clearance for the larger diameter pinion 17" to be accommodated in the machine frame 15.
  • the teeth of the pinions must mesh with the racks with as little backlash as possible.
  • means must be provided to compensate wear on the tooth flanks. This can be done by a divided form of construction of the pinions and by relatively adjusting or resetting the teeth 20 and 21 of the two halves.
  • the tooth width must be so designed that the teeth 20 and 21 on each half can transmit the full load.
  • two holes 23 are located on a pitch circle 25 in the upper half of the pinion, whereas the lower half of the pinion is provided with two coneddepressions 22' that are off-center in opposite directions with respect to the holes in the upper half of the pinion.
  • the upper and bottom half of the pinion are then clamped firmly together by screws 24 engaging tapped holes 26.
  • the clearance between tooth flanks is not adjusted until the pitch circle of the pinion and the pitch line of the rack are tangent.
  • the axis of the pinion is eccentrically mounted.
  • the pinions are first adjusted with reference to the sliding rack 7 in the middle. When this has been done the outer racks 8 are adjusted in the machine frame with reference to the adjusted position of the pinion.
  • the spring stack 28 in a machine according to the invention is given the usual bias and the necessary increase in thrust at the reversal points 27 is obtained by increasing the center distance between the two rollers 2 and 3 at these points, and by thereby increasing the compression of the stacks of springs 28.
  • This step ensures that the rollers 2 and 3 sill maintain contact with the cam.
  • the shape of the cam 29, 30 must, of course, not be changed because this determines the character of carriage reciprocation. Consequently the cam flight must be thickened on that side 31 of the flight which faces away from the rollers 2 which take the load at reversal.
  • Reciprocating carriage drawing machine comprising first guideways extending ,in a given drawing direction, a drawing carriage reciprocably mounted in said first guideways, revolving cam means operatively connected to said drawing carriage for reciprocating the same along said first guideways, an intermediate carriage interposed between said drawing carriage and said cam means for lengthening the stroke of said drawing carriage, said intermediate carriage being also operatively connected to said cam means and being similarly reciprocable thereby in second guideways in said given drawing direction, and step-up transmission means for increasing the length of stroke of said drawing carriage comprising at least one axle carried by said intermediate carriage and extending substantially perpendicularly to said given drawing direction, a machine frame, two stationary racks mounted on opposite sides of said machine, frame, said transmission means comprising two pinion means mounted side-by-side on said intermediate carriage, said two pinion means being in respective meshing engagement at one side thereof with said stationary racks and on the other side thereof with a rack slideable in third guideways parallel to said drawing direction, said slideable rack being disposed between said two pinion means and
  • Reciprocating carriage drawing machine comprising first guideways extending in a given drawing direction, a drawing carriage reciprocatingly mounted in said-first guideways, revolving cam means operatively connected to said drawing carriage for reciprocating the same along said first guideways, an intermediate carriage interposed between said drawing carriage and said cam means for lengthening the stroke of said drawing carriage, said intermediate carriage being also operatively connected to said cam means and being similarly reciprocable thereby in second guideways in said given drawing direction, and step-up transmission means for increasing the length of stroke of said drawing carriage comprising at least one axle carried by said intermediate carriage and extending substantially perpendicularly to said given drawing direction, pinion means loosely mounted on said axle and being in meshing engagement at one side thereof with a stationary rack and on the other side thereof with a rack slidable in third guideways parallel to said drawing direction, said slidable rack being coupled to said drawing carriage by a one-way coupling effective only in said given drawing direction.
  • Reciprocating carriage drawing machine compris- -ing first guideways extending in a given drawing direction, a drawing carriage reciprocably mounted in said first guideways, revolving cam means operatively connected to said drawing carriage for reciprocating the same along said first guideways, an intermediate carriage interposed between said drawing carriage and said cam means for lengthening the stroke of said drawing carriage, said intermediate carriage being also operatively connected to said cam means and being similarly reciprocable thereby in second guideways in said given drawing direction, and step-up transmission means for increasing the length of stroke of said drawing carriage comprising at least on axle carried by said intermediate carriage and extending substantially perpendicularly to said given drawing direction, pinion means loosely mounted on said axle and being in meshing engagement at one side thereof with a stationary rack and on the other side thereof with a rack slidable in third guideways parallel to said drawing direction, said slidable rack being coupled to said drawing carriage, said third guideways being mounted on said intermediate carriage and said first and second guideways for said drawing and said intermediate carriages respectively, are mounted in rails located above one
  • Reciprocating carriage drawing machine comprising first guideways extending in a given drawing direction, a drawing carriage reciprocably mounted in said first guideways, revolving cam means operatively connected to said drawing carriage for reciprocating the same along said first guideways, an intermediate carriage interposed between said drawing carriage and said cam means for lengthening the stroke of said drawing carriage, said intermediate carriage being also operatively connected to said cam means and being similarly reciprocable thereby in second guideways in said given drawing direction, and step-up transmission means for increasing the length of stroke of said drawing carriage comprising at least one axle carried by said intermediate carriage and extending substantially perpendicularly to said given drawing direction, pinion means loosely mounted on said axle and being in meshing engagement at one side thereof with a stationary rack and on the other side thereof with a rack slidable in third guideways parallel to said drawing direction, said slidable rack being coupled to said drawing carriage, said pinion means being in the form of a double pinion, the pinions of said pinion means having different numbers of teeth, one of the pinions of said
  • each of said pinion means is in the form of a double pinion, the two pinions as each of said pinion means having different numbers of teeth, one of the two pinions of each of said pinion means being in meshing engagement with said stationary rack, and the other of the two pinions of each of said pinion means being in meshing engagement with said slidable rack.
  • Reciprocating carriage drawing machine comprising first guideways extending in a given drawing direction, a drawing carriage reciprocably mounted in said first guideways, revolving cam means operatively connected to said drawing carriage for reciprocating the same along said first guideways, an intermediate carriage interposed between said drawing carriage and said cam means for lengthening the stroke of said drawing carriage, said intermediate carriage being also operatively connected to said cam means and being similarly reciprocable thereby in second guideways in said given drawing direction, and step-up transmission means for increasing the length of stroke of said draw- I ing carriage comprising at least one axle carried by said intermediate carriage and extending substantially perpendicularly to said given drawing direction, pinion means loosely mounted on said axle and being in meshing engagement at one side thereof with a stationary rack and on the other side thereof with a rack slidable in third guideways parallel to said drawing direction, said slidable rack being coupled to said drawing car riage, said pinion means being formed of two parts meeting in a median center plane thereof, and means for relatively adjusting and locking the teeth of both
  • Reciprocating carriage drawing machine comprising first guideways extending in a given drawing direction, a drawing carriage reciprocably mounted in said first guideways, revolving cam means operatively connected to said drawing carriage for reciprocating the same along said first guideways, an intermediate carriage interposed between said drawing carriage and said cam means for lenghtening the stroke of said drawing carriage, said intermediate carriage being also operatively connected to said cam means and being similarly reciprocable thereby in second guideways in said given drawing direction, and step-up transmission means for-increasing the length of stroke of said drawing carriage comprising at least one axle carried by said intermediate carriage and extending substantially perpendicularly to said given drawing direction, pinion means loosely mounted on said axle and being in meshing engagement at one side thereof with a stationary rack and on the other side thereof with a rack slidable in third guideways parallel to said drawing direction, said slidable rack being coupled to said drawing carriage, said racks being formed of two parts respectively, meeting in a median center plane thereof, and means for relatively adjusting and locking the teeth of both
  • Reciprocating carriage drawing machine comprising first guideways extending in a given drawing direction, a drawing carriage reciprocably mounted in said first guideways, revolving cam means operatively connected to said drawing carriage for reciprocating the same along said first guideways, an intermediate carriage interposed between said drawing carriage and said cam means for lengthening the stroke of said drawing carriage, said intermediate carriage being also operatively connected to said cam means and being riage, said intermediate carriage having load-bearing rollers engageable with one side of a flight formed on said rotary cam, said flight being widened on a side thereof facing away from said load-bearing rollers in a region of said flight at which reversal of direction occurs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Metal Extraction Processes (AREA)
US55092A 1969-07-16 1970-07-15 Reciprocating carriage drawing machine Expired - Lifetime US3693395A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691936139 DE1936139A1 (de) 1969-07-16 1969-07-16 Schlittenziehmaschine

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US3693395A true US3693395A (en) 1972-09-26

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US55092A Expired - Lifetime US3693395A (en) 1969-07-16 1970-07-15 Reciprocating carriage drawing machine

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US (1) US3693395A (sv)
JP (1) JPS4937912B1 (sv)
DE (1) DE1936139A1 (sv)
FR (1) FR2051771B1 (sv)
GB (1) GB1288114A (sv)
SE (1) SE373510B (sv)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255740A1 (en) * 1986-08-06 1988-02-10 DANIELI & C. OFFICINE MECCANICHE S.p.A. Drive unit for draw benches
US20130025386A1 (en) * 2011-07-29 2013-01-31 Shawn Michael Callahan Coupler assembly and drive systems including same
IT201900008901A1 (it) * 2019-06-13 2020-12-13 Danieli Off Mecc Banco di trafilatura per macchina trafilatrice
CN112894566A (zh) * 2021-01-18 2021-06-04 何大顺 一种工业铝型材制造加工系统
CN113649895A (zh) * 2021-07-02 2021-11-16 四川德鑫航空设备股份有限公司 不锈钢产品表面自动拉丝设备

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3644560C1 (en) * 1986-12-27 1988-06-09 Kieserling Ziehmaschinen Sledge drive for a drawing machine
GB2242954B (en) * 1987-05-08 1992-01-15 Maxwell Marine Ltd A gear for use in a gear box
DE4302788A1 (de) * 1993-02-02 1994-08-04 Schumag Ag Verfahren zur translatorischen Bewegung von Bauteilen und Bewegungsantrieb zur Durchführung des Verfahrens
CN117862982B (zh) * 2024-03-08 2024-06-04 江苏铭创新材料系统科技有限公司 一种铝板传动加工设备及加工方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1298999A (en) * 1918-07-05 1919-04-01 James T Moltrup Apparatus for drawing rods.
US2367793A (en) * 1942-01-01 1945-01-23 Vaughn Machinery Co Drawbench
CA456226A (en) * 1949-04-26 J. Mcilvried Edwin Draw bench
US2781136A (en) * 1955-12-27 1957-02-12 Press Automation Systems Inc Material handling apparatus
US2910321A (en) * 1957-02-18 1959-10-27 Sehn Gripper mechanism for material handling device
US2943750A (en) * 1960-07-05 Material handling device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA456226A (en) * 1949-04-26 J. Mcilvried Edwin Draw bench
US2943750A (en) * 1960-07-05 Material handling device
US1298999A (en) * 1918-07-05 1919-04-01 James T Moltrup Apparatus for drawing rods.
US2367793A (en) * 1942-01-01 1945-01-23 Vaughn Machinery Co Drawbench
US2781136A (en) * 1955-12-27 1957-02-12 Press Automation Systems Inc Material handling apparatus
US2910321A (en) * 1957-02-18 1959-10-27 Sehn Gripper mechanism for material handling device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255740A1 (en) * 1986-08-06 1988-02-10 DANIELI & C. OFFICINE MECCANICHE S.p.A. Drive unit for draw benches
US20130025386A1 (en) * 2011-07-29 2013-01-31 Shawn Michael Callahan Coupler assembly and drive systems including same
US9739352B2 (en) * 2011-07-29 2017-08-22 Flow International Corporation Drive system with coupler assembly and method
IT201900008901A1 (it) * 2019-06-13 2020-12-13 Danieli Off Mecc Banco di trafilatura per macchina trafilatrice
CN112894566A (zh) * 2021-01-18 2021-06-04 何大顺 一种工业铝型材制造加工系统
CN112894566B (zh) * 2021-01-18 2022-11-22 平江天正铝业科技有限公司 一种工业铝型材制造加工系统
CN113649895A (zh) * 2021-07-02 2021-11-16 四川德鑫航空设备股份有限公司 不锈钢产品表面自动拉丝设备

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Publication number Publication date
SE373510B (sv) 1975-02-10
DE1936139B2 (de) 1971-07-01
FR2051771A1 (sv) 1971-04-09
FR2051771B1 (sv) 1973-05-25
JPS4937912B1 (sv) 1974-10-14
GB1288114A (sv) 1972-09-06
DE1936139A1 (de) 1971-07-01

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