US3620067A - Article shaping or forming machines - Google Patents

Article shaping or forming machines Download PDF

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Publication number
US3620067A
US3620067A US858618A US3620067DA US3620067A US 3620067 A US3620067 A US 3620067A US 858618 A US858618 A US 858618A US 3620067D A US3620067D A US 3620067DA US 3620067 A US3620067 A US 3620067A
Authority
US
United States
Prior art keywords
tool
workpiece
links
link
support
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
US858618A
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English (en)
Inventor
Keith Ross
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.)
Davy Loewy Ltd
Original Assignee
Davy Loewy 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 Davy Loewy Ltd filed Critical Davy Loewy Ltd
Application granted granted Critical
Publication of US3620067A publication Critical patent/US3620067A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/10—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism
    • B30B1/16—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by toggle mechanism operated by fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B7/00—Presses characterised by a particular arrangement of the pressing members
    • B30B7/04—Presses characterised by a particular arrangement of the pressing members wherein pressing is effected in different directions simultaneously or in turn

Definitions

  • a machine for hot or cold forging of a workpiece or for compacting metal powder in a die into a solid Workpiece has a support and at least one tool reciprocatable towards and away from the support, a first link is pivotally secured at one end to the tool and is pivotally jointed at the other end to one end of a second link, the second link being pivotally secured at its other end to anchor means which can be displaced towards and away from the support.
  • the pivot joint is reciprocated through a position in which the links are in line between positions in which the links are inclined to one another.
  • the pivot joint may be reciprocated by means of a double-acting fluid operated piston and cylinder device.
  • a plurality of similar pivot joints may be operated simultaneously and in synchronism by connecting all the pivot joints to an annular ring which is reciprocated about its axis.
  • This invention relates to a machine for shaping a workpiece.
  • the shaping of the workpiece may consist of hot or cold forging or it may consist of compacting metal powder in a die into a solid workpiece.
  • the machine may have more than one tool which are urged together into engagement with the workpiece.
  • a machine for shaping a workpiece comprises at least one tool reciprocata ble towards and away from a support for a workpiece, a first link pivotally secured at one end to the tool and pivotally jointed at the other end to one end of a second link, said second link being pivotally secured at its other end to anchor means which is displaceable towards and away from the support in a direction substantially parallel with the direction of movement of the tool and means for reciprocating the pivot joint through a position in which the links are in line between first and second positions in which the links are inclined to one another.
  • the or each pivot joint may be reciprocated by means of a double-acting fluid operated piston and cylinder device.
  • a double-acting fluid operated piston and cylinder device Each time the pivot joint passes through the position 1n which the links are in line the distance between the tool and the support for the workpiece is a minimum and when a workpiece is positioned on the support it can be arranged for the tool to impact the workpiece. After each impact of the tool with the workpiece the tool is moved away from the workpiece and the anchor means can be displaced towards the support so that the next time the prvot joint passes through the position in which the linkages are in line a further impact of the tool against the workpiece is obtained.
  • a machine for shaping a workpiece comprises a plurality of tools arranged about a common pass-line of the machine and each reciprocatable towards and away from the pass-line, each tool being pivotally secured to one end of a first link the other end of which is pivotally jointed to one end of a second link, the other end of the second link being pivotally secured to anchor means displaceable towards and away from the pass-line in a direction substantially parallel with the direction of movement of the tool with which it is associated and means for reciprocating the pivot joints together through a position in which the links of each pair are in line between first and second positions in which the links of each pair are inclined to one another.
  • FIG. 1 represents schematically an embodiment of the invention employing a single reciprocatable tool
  • FIG. 2 represents schematically an embodiment of the invention in which a plurality of tools are provided and the tools are operated in synchronism.
  • a machine for shaping a workpiece comprises a support 10 for a workpiece and a forging tool 11.
  • the tool 11 is mounted in guides 12 which permit the tool to reciprocate towards and away from the support 10.
  • the means for displacing the tool 11 comprises first and second links 14 and 15.
  • the links are pivotally jointed together at their adjacent ends as indicated by reference numeral 16, while the other end of link 15 is pivotally secured to the tool 11.
  • the other end of the link 14 is pivotally secured to an anchor member 19 which is displaceable towards and away from the support 10.
  • a double-acting hydraulic piston and cylinder device 20 is connected to the pivot joint 16.
  • the link 14 is pivoted to the anchor means 19 by a connection 18 which is positioned on a vertical line extending through the longitudinal axis of the tool 11 so that the maximum force is applied by the tool to a workpiece on the support 10 when the links are in line.
  • a workpiece 22 is positioned on the support 10 and the piston and cylinder device 20 is energised to cause the pivot joint 16 to be displaced from the position shown in FIG. 1 where the links 14 and 15 are inclined to one another along the path BD where the links are in line and those along the path DE to the position where the links are inclined to one another.
  • the tool 11 is urged into contact with the workpiece and then lifted from the workpiece.
  • the pivoted joint 16 moves along the path EDB. It can be seen that rapid stroking is possible since the piston and cylinder device 20 makes a working stroke in each direction.
  • the workpiece After the first working stroke the workpiece may be rotated so that the tool 11 engages at a different surface on the return stroke or if the workpiece is not rotated the anchor means may be displaced slightly towards the support 10 :so that over-sequeezing of the workpiece is brought about on the return stroke.
  • the anchor means 19 For large displacement of the anchor means 19 it may be necessary to adjust the position of the piston and cylinder device 20 in a direction corresponding to the adjustment made to the. anchor means 19.
  • the support 10 comprises a further displaceable tool having further links and a piston and cylinder device similar to those associated with tool 11. The two piston and cylinder devices are then operated in synchronism.
  • FIG. 2 illustrates a machine having two separate displaceable work tools.
  • Each of the tools 11 has a linkage 13 associated therewith which is similar to that shown in FIG. 1 and the pivoted joints 16 are acted upon by a single annular ring 25 guided to move around its centre.
  • the pivoted joints are mounted on separate blocks which are slideable radially in openings in the ring.
  • a radially extending arm 26 projects from the ring 25 and a piston rod 27 of a fluid operated double-acting piston and cylinder device 28 is attached to the arm 26.
  • the cylinder of the device is pivotally secured to an anchor plate 29.
  • the piston and cylinder device 28 is actuated causing reciprocal rotary movement of the ring 25 which in turn causes the pivoted joints to reciprocate along an arcuate path BDE causing the forging tools 11 to apply a force to the workpiece 22 each time the links 14 and 15 of each tool are in line.
  • the anchor means 19 are displaceable towards the workpiece 22 and if desired they may be pre-loaded so that if the load on the forging tool 11 exceeds a pre-set value then the anchor means are displaced outwardly to relieve the load.
  • a plurality of rings 25 with their associated linkages and forging tools may be arranged in tandem thereby enabling a workpiece to be reduced in several stages during a single pass through the machine.
  • Multi-directional shaping machines in accordance with the present invention will be cheaper to construct than known machines which have complicated hydraulic systems and control systems to achieve synchronism between the forging tools.
  • a machine for shaping a workpiece comprising a plurality of tools arranged around a common passline of the machine and each reciprocatable towards and away from the pass-line,
  • each pivotable joint is mounted in a separate block slideable in the ring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
US858618A 1968-09-18 1969-09-17 Article shaping or forming machines Expired - Lifetime US3620067A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4437668 1968-09-18

Publications (1)

Publication Number Publication Date
US3620067A true US3620067A (en) 1971-11-16

Family

ID=10432987

Family Applications (1)

Application Number Title Priority Date Filing Date
US858618A Expired - Lifetime US3620067A (en) 1968-09-18 1969-09-17 Article shaping or forming machines

Country Status (5)

Country Link
US (1) US3620067A (ja)
JP (1) JPS5018632B1 (ja)
AT (1) AT290947B (ja)
DE (1) DE1945757B2 (ja)
GB (1) GB1250661A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926033A (en) * 1974-01-28 1975-12-16 Renault Toggle-joint press
US4934173A (en) * 1989-03-17 1990-06-19 Amp Incorporated Stamping and forming machine having toggles for reciprocating the tooling assemblies
US5203197A (en) * 1991-08-19 1993-04-20 Cogsdill Tool Products, Inc. Clamp assembly
WO2004016415A1 (de) * 2002-07-23 2004-02-26 Hengstebeck Gmbh & Co. Kg Parallel-druckmodul
EP1987946A3 (de) * 2007-04-18 2009-05-13 Bernhard Hengstebeck Presse mit einem Paralleldruckmodul
CN107030469A (zh) * 2017-06-16 2017-08-11 安徽江淮汽车集团股份有限公司 通用型压装工具

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926033A (en) * 1974-01-28 1975-12-16 Renault Toggle-joint press
US4934173A (en) * 1989-03-17 1990-06-19 Amp Incorporated Stamping and forming machine having toggles for reciprocating the tooling assemblies
US5203197A (en) * 1991-08-19 1993-04-20 Cogsdill Tool Products, Inc. Clamp assembly
WO2004016415A1 (de) * 2002-07-23 2004-02-26 Hengstebeck Gmbh & Co. Kg Parallel-druckmodul
EP1987946A3 (de) * 2007-04-18 2009-05-13 Bernhard Hengstebeck Presse mit einem Paralleldruckmodul
CN107030469A (zh) * 2017-06-16 2017-08-11 安徽江淮汽车集团股份有限公司 通用型压装工具

Also Published As

Publication number Publication date
DE1945757A1 (de) 1970-04-02
AT290947B (de) 1971-06-25
JPS5018632B1 (ja) 1975-07-01
DE1945757B2 (de) 1977-08-25
GB1250661A (ja) 1971-10-20

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