US3556315A - Gripper device for conveying workpieces in hot die forging presses - Google Patents

Gripper device for conveying workpieces in hot die forging presses Download PDF

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Publication number
US3556315A
US3556315A US716573A US3556315DA US3556315A US 3556315 A US3556315 A US 3556315A US 716573 A US716573 A US 716573A US 3556315D A US3556315D A US 3556315DA US 3556315 A US3556315 A US 3556315A
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US
United States
Prior art keywords
tongs
elements
gripper means
gripper
assembly
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
US716573A
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English (en)
Inventor
Rolf Berger
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.)
Eumuco AG fuer Maschinenbau
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Eumuco AG fuer Maschinenbau
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Application filed by Eumuco AG fuer Maschinenbau filed Critical Eumuco AG fuer Maschinenbau
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Publication of US3556315A publication Critical patent/US3556315A/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/10—Manipulators

Definitions

  • PATENIEUJANISIBH 3.656315 sum 2 or 2 IN VE N TOR Ron- HERA ER BY ga m9 W ,qrrrs,
  • Conveying grippers having a prismatic aperture for gripping symmetrical tubular parts such as billet pieces and the like or die forgings of rotationally symmetrical type forged from billet pieces are already well known. These prior art grippers are generally mounted to be resiliently" mobile in the gripper direction so that all workpieces which are'situated in the conveying system are gripped with the same application pressures.
  • the workpiece is engaged by means of the prismatic aperture of the grippers above and below the workpiece at the sides thereof.
  • the workpiece may also be engaged above and below the forging fin which is formed in the forging operation.
  • the workpiece is forcibly held and conveyed by the prismatic elements of the grippers.
  • the workpiece In die forging, the workpiece is released from the conveying system at the instant of forging. and reengaged after the pressing operation has been completed. It may happen that the workpieces do not detach unifonnly from the die.
  • the forging flash is no longer in a plane parallel to the die division but is at an oblique angle ize. at one side the forging flash contacts the flash tin and at the opposite side is at a correspondingly considerable spacing from the tin.
  • the prismatic element cannot press against the workpiece in order toengage it symmetrically. Instead'the elements abut against the forging flash thereby causing a disturbance in the 7 processing sequence.
  • An object of this invention is to provide a conveying gripper I for hot die forging presses with a mechanical workpiece conveyance wherein a workpiece may be reliably engaged independently of its position in the die.
  • Another object of this invention is to provide a conveying gripper for hot die forging presses wherein a forging workpiece which is not rotationally symmetrical may be suitably handled by the said gripper device.
  • the device of this invention includes aworkpiece gripper which includes tongs elements which are controlled by actuating and locking devices.
  • the gripper device includes two tongs elements which are connected at a common point and there fore have a common articulation.
  • Tongs elements are contained in a body wherein each said elementis mounted on a longitudinally displaceable pivot pin which is movable with respect to the said tongs body.
  • Each tongs element further includes a supporting and locking extension having a locking element associated therewith. The ends of the extensions en'- gage over the locking element in a manner to carry out locking of the gripper tongs elements.
  • the body containing the elements of the workpiece gripper moves both invhorizontally and vertically oriented planes. 7
  • the structure of the gripper device provides automatically opening and closing tongs jaws. As the body of the tongs jaws moves horizontally in the direction toward the workpiece, the
  • the tongs jaw ends produce a force locking connection against the said I workpiece.
  • the closing tongs jaws grip the forging flash in a positive connection which holds the work piece completely securely and unequivocally in its position in the die.
  • the tongs jaws will engage and align the forging workpiece with a positive gripping action.
  • the tongs can securely engage and transport both symmetrical and asymmetrical forgings at any time.
  • the gripper device is simple in construction and always operates in a reliable manner mechanically.
  • Another feature of the invention provides for the lower tongs element to engage an inclined surface located on the forging die. In this way, the closing operation of the tongs is initiated upon engagement with the inclined surface.
  • a spring system is used for the opening operation.
  • a pistoncylind er unit can be used wherein a piston rod acts on the tongs-element at a location between the pivot pin and the common connecting articulation point with a second tongs element.
  • FIG. I shows a longitudinaksectional view of a gripper device according to the invention wherein thedevice is in an open position and shown in conjunction with a dieand a workpiece situated therein,
  • FIG. 2 Ba longitudinal sectional view showing the gripper device-having the grippers engaged with the workpiece at the flash transition region
  • FIG. 3 shows a longitudinal sectionalview of the gripper device wherein the tongs elements are locked by the tongs body
  • FIG.'5 is a diagrammatic sketch illustrating the movement of the conveying beams or bodies on which the conveying grippers are arranged.
  • the end extensions I2 and 13 are used as hearing and locking portions and cooperate with a locking element 14 which is fixedly mounted on the tongs body 8.
  • the extension 13 includes a nose 130 which engages the lower portion of the locking element 14.
  • a spring system acts to effect the opening of the tongs elements 2 and 3.
  • the spring system of this specific embodiment includes a piston 15, cylinder 16 and piston rod 17.
  • the piston rod 17 abuts the tongs element 2 between the pivot pin 4 and the connecting articulation 9.
  • the tongs body 8 is mounted on a conveying beam 18.
  • the tongs body 8 may be adjusted in the horizontal and vertical directions with respect to the beam 18 by way of adjusting means 19 and 20.
  • the conveying beams 18 are movably mounted on means not shown to efiect movements 21 and 22 relative to the tool center 23. These movements are diagrammatically shown in FIG. 5.
  • a workpiece 25 is maintained in the die 24 during the overall forging operation.
  • the die 24 includes an inclined surface 26 which cooperates with the jaw end 11 on the tongs element 3.
  • the jaw ends 10 and 11 act on the workpiece 25 at the forging flash 27.
  • a pair of gripper devices as shown in FIG. I move from both sides of the workpiece 25 in a horizontal direction x.
  • the tongs elements 2 and 3 are moved uniformly by way of the conveying beams 18 to a position for gripping the forg" ing flash 27.
  • the workpiece'25 may be slightly raised in the die 24 by means of a lower ejector means which is not shown.
  • the tongs elements 2 and 3 are held open by the spring system 15, I6 and 17. Compressed air acting on the piston 15 presses the piston rod 17 against the tongs element 2.
  • the tongs element 3 is held open during this operation by means of the connecting articulation 9.
  • FIG. 4 shows a cross-sectional view taken on the line IV-IV tensions 12 and 13 bear on the locking element and the two jaw ends 10 and 11 are held at the pins 4 and 5 in the forward position.
  • the extensions 12 and 13 are so far apart from one another that further advancement of the conveying beam in the x direction toward the die 24 causes the extensions 12 and 13 to slide over the locking element 14 thereby effecting the first part of the locking operation.
  • the extensions 12 and 13 slide over the locking element 14, the tongs elements 2 and 3 shift in the longitudinal x direction by displacement in slots 6 and 7 of the tongs body 8 thereby completing the locking operation.
  • the forging flash 27 is positively held by the tongs jaws 10 and 11 with a vertically directed action once the tongs elements 2 and 3 are positively locked in this manner.
  • the workpiece 25 may then be conveyed to another position in accordance with the lines 21 and 22.
  • the spring system 15, 16 and 17 is again actuated to release extensions 12 and 13.
  • Pressure applied in the cylinder 16 pushes the piston 15 and thereby moves the locking element 14 out of contact with the extensions 12 and 13.
  • Continued application of pressure in the cylinder 16 causes the piston rod 17 to push against the tongs element 2 in the longitudinal x direction.
  • the tongs elements 2 and 3 shift in the longitudinal x direction by displacement in the slots 6 and 7 respectively of the tongs body 8.
  • the jaws 10 and 11 are forced open. This completes the releasing operation of the gripper device 1.
  • the conveying beams 18 are then returned to their initial position with the tongs elements 2 and 3 opened.
  • An assembly for conveying workpieces in a hot die forging press comprising:
  • a. gripper means including a tongs body and tongs elements pivotally mounted and longitudinally displaceable in the tongs body;
  • said tongs elements having a common articulation point and having a structural configuration to provide opening and closing action when one of the elements is moved;
  • said tongs elements including extension.portions projecting rearwardly thereof to engage the locking structure which is located between the extension portions when the tongs elements are in a closed position;
  • An assembly for conveying workpieces in a hot die forging press comprising:
  • a. gripper means including atongsbody, tongs elements pivotally mounted and longitudinally displaceable in the tongs body, and actuating means to maintain the tongs elements in an open position;
  • said tongs elements having a common articulation point and having a structural configuration to provide opening and closing action when one of the elements is moved;
  • said tongs elements including extension portions projecting rearwardly thereof to engage the locking structure which is located between the extension portions when the tongs elements are in a closed position;
  • said actuating means comprises a piston-cylinder mechanism having a piston rod which engages the rearward side of the tongs elements between one of the pivot points of the tongs elements and the common articulation point.
  • tongs elements include pivot pins which project into slots located in the tongs body; said slots extend in a direction substantially parallel to the forward movement of the gripper means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US716573A 1967-03-29 1968-03-27 Gripper device for conveying workpieces in hot die forging presses Expired - Lifetime US3556315A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE33695A DE1300501B (de) 1967-03-29 1967-03-29 Foerdereinrichtung fuer den Transport von Werkstuecken an Warmschmiedegesenkpressen

Publications (1)

Publication Number Publication Date
US3556315A true US3556315A (en) 1971-01-19

Family

ID=7076343

Family Applications (1)

Application Number Title Priority Date Filing Date
US716573A Expired - Lifetime US3556315A (en) 1967-03-29 1968-03-27 Gripper device for conveying workpieces in hot die forging presses

Country Status (4)

Country Link
US (1) US3556315A (enrdf_load_stackoverflow)
DE (1) DE1300501B (enrdf_load_stackoverflow)
FR (1) FR1557468A (enrdf_load_stackoverflow)
GB (1) GB1196381A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3942649A (en) * 1973-10-29 1976-03-09 Rodney Dale Hugelman Transfer mechanism
US3977535A (en) * 1973-12-21 1976-08-31 G. Siempelkamp & Co. Apparatus for loading a workpiece stack into a platen press
US4052241A (en) * 1975-11-13 1977-10-04 Detroit Gasket And Manufacturing Company Method of forming a contoured laminate
US4152188A (en) * 1973-05-25 1979-05-01 Saint-Gobain Industries Method and apparatus for manufacture of laminated glazing
US4740133A (en) * 1983-11-24 1988-04-26 Mazda Motor Corporation Composite working device using a robot and method of accomplishing composite work using a robot
US4893982A (en) * 1987-09-17 1990-01-16 Taiho Seiki Co., Ltd. Apparatus for conveying workpiece
US5226778A (en) * 1989-09-28 1993-07-13 Murata Kikai Kabushiki Kaisha Yarn supply device for automatic winder
US10065324B2 (en) * 2015-11-25 2018-09-04 Jtekt Corporation Conveying apparatus
CN116037842A (zh) * 2023-03-30 2023-05-02 北京德信友和科技有限公司 一种用于机械设备中操纵工具用机械夹爪

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2708457C2 (de) * 1977-02-26 1989-04-27 Kabushiki Kaisha Komatsu Seisakusho, Tokio/Tokyo Transportmechanismus für Schmiedemaschinen
DE2806987C3 (de) * 1978-02-18 1980-08-21 Maschinenfabrik Hasenclever Gmbh, 4000 Duesseldorf Vorrichtung zum Manipulieren von Werkstücken

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216846C (enrdf_load_stackoverflow) *
US1620778A (en) * 1923-06-04 1927-03-15 Earl R Odom Carrying-in device for leers
US1721283A (en) * 1927-07-30 1929-07-16 Burdsall & Ward Co Swaging machine
US1730705A (en) * 1927-10-27 1929-10-08 Wild Charles Core breaker and hoister
US3430779A (en) * 1967-10-16 1969-03-04 Verson Allsteel Press Co Transfer assembly for a press
US3432042A (en) * 1967-10-16 1969-03-11 Verson Allsteel Press Co Transfer assembly for presses

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE545590C (de) * 1930-03-19 1932-03-03 Erdmann Kircheis Fa Vorrichtung zum Zufuehren von Werkstuecken
US2367515A (en) * 1943-07-23 1945-01-16 Ontario Mfg Company Automatic work ejector
FR1250634A (fr) * 1959-12-02 1961-01-13 Wagner & Co Werkzeugmaschf Presse à forger à voie cadencée
DE1153593B (de) * 1959-12-28 1963-08-29 Dr Theodor Wuppermann Fahrbare Schmiedezange
US3080840A (en) * 1960-03-17 1963-03-12 Gen Motors Corp Press transfer mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE216846C (enrdf_load_stackoverflow) *
US1620778A (en) * 1923-06-04 1927-03-15 Earl R Odom Carrying-in device for leers
US1721283A (en) * 1927-07-30 1929-07-16 Burdsall & Ward Co Swaging machine
US1730705A (en) * 1927-10-27 1929-10-08 Wild Charles Core breaker and hoister
US3430779A (en) * 1967-10-16 1969-03-04 Verson Allsteel Press Co Transfer assembly for a press
US3432042A (en) * 1967-10-16 1969-03-11 Verson Allsteel Press Co Transfer assembly for presses

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4152188A (en) * 1973-05-25 1979-05-01 Saint-Gobain Industries Method and apparatus for manufacture of laminated glazing
US3942649A (en) * 1973-10-29 1976-03-09 Rodney Dale Hugelman Transfer mechanism
US3977535A (en) * 1973-12-21 1976-08-31 G. Siempelkamp & Co. Apparatus for loading a workpiece stack into a platen press
US4052241A (en) * 1975-11-13 1977-10-04 Detroit Gasket And Manufacturing Company Method of forming a contoured laminate
US4740133A (en) * 1983-11-24 1988-04-26 Mazda Motor Corporation Composite working device using a robot and method of accomplishing composite work using a robot
US4893982A (en) * 1987-09-17 1990-01-16 Taiho Seiki Co., Ltd. Apparatus for conveying workpiece
US5226778A (en) * 1989-09-28 1993-07-13 Murata Kikai Kabushiki Kaisha Yarn supply device for automatic winder
US10065324B2 (en) * 2015-11-25 2018-09-04 Jtekt Corporation Conveying apparatus
CN116037842A (zh) * 2023-03-30 2023-05-02 北京德信友和科技有限公司 一种用于机械设备中操纵工具用机械夹爪

Also Published As

Publication number Publication date
FR1557468A (enrdf_load_stackoverflow) 1969-02-14
DE1300501B (de) 1969-08-07
GB1196381A (en) 1970-06-24

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