EP0048776A1 - Präzisions-Schmiedepresse - Google Patents

Präzisions-Schmiedepresse Download PDF

Info

Publication number
EP0048776A1
EP0048776A1 EP80303412A EP80303412A EP0048776A1 EP 0048776 A1 EP0048776 A1 EP 0048776A1 EP 80303412 A EP80303412 A EP 80303412A EP 80303412 A EP80303412 A EP 80303412A EP 0048776 A1 EP0048776 A1 EP 0048776A1
Authority
EP
European Patent Office
Prior art keywords
punches
voltages
forging
workpiece
press
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.)
Granted
Application number
EP80303412A
Other languages
English (en)
French (fr)
Other versions
EP0048776B1 (de
Inventor
Yuki Kushibe
Hisao Kishigami
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to EP80303412A priority Critical patent/EP0048776B1/de
Priority to DE8080303412T priority patent/DE3065700D1/de
Publication of EP0048776A1 publication Critical patent/EP0048776A1/de
Application granted granted Critical
Publication of EP0048776B1 publication Critical patent/EP0048776B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/18—Control arrangements for fluid-driven presses controlling the reciprocating motion of the ram

Definitions

  • the present invention relates to improvements in precision forging presses.
  • an object of the present invention to provide a novel precision forging press in which the positions of the upper and lower punches can be controlled continuously as desired during deformation of a workpiece.
  • a precision forging press comprising a plurality of punches adapted to be driven by respective drive means for forging a workpiece, characterised by means for converting positional information relating to the respective punches into voltages, a reference voltage generator for generating a plurality of programmed reference voltages, comparator means for comparing said respective converted voltages with the corresponding ones of said programmed reference voltages, and control means for controlling said respective drive means in accordance with comparison results from said comparator means.
  • the press comprises an upper die 1 and a lower die 2, which define a forging space in which a workpiece 3 of raw material can be accommodated.
  • An upper punch 4 and a lower punch 5 are associated with respective upper and lower dies, the upper punch being connected to a main ram 5.
  • the upper and lower punches 4 and 5 slidably project through the upper and lower dies 1 and 2 respectively, into the forging space upon actuation of an upper auxiliary ram 7 and a lower auxiliary ram 8.
  • To the bottom of the main ram 6 is mounted an upper bolster 9 to which the upper die 1 is fixed.
  • a lower bolster 10 is provided to which the lower die 2 is fixed, the lower bolster 10 being mounted on a machine frame-11.
  • Hydraulic circuits are provided for the upper auxiliary ram 7, lower auxiliary ram 8 and main ram 6, respectively, said circuits including pressure regulation valves 12a, 12b and 12c, switching valves 13a, 13b and 13c, hydraulic pumps 14a, 14b and 14c and flow rate regulation valves 15a and 15b.
  • the switching valve 13c is actuated to introduce pressurized oil into the upper chamber of the main ram 6 by the action of the hydraulic pump 14c, and thereby the main ram 6 is lowered to close the dies 1 and 2 together.
  • the upper and lower punches 4 and 5 are set in motion to press into the dies 1 and 2 by the actuation of the upper and lower auxiliary rams 7 and 8, respectively, and thus the forging of the workpiece 3 of raw material is started.
  • the press comprises an upper die 1, and a lower die 2 defining a forging space for a workpiece 3, an upper punch 4, a lower punch 5, a main ram 6, upper and lower auxiliary rams 7, 8 respectively, upper and lower bolsters 9 and 10 respectively, a machine frame 11 and hydraulic circuits including pressure regulation valves 12a, 12b and 12c, a switching valve 13c and hydraulic pumps 14a, 14b and 14c.
  • the above-referred to components are identical to those included in the prior art press shown in Figure 1.
  • the press has a mount table 16 for a potentiometer 17b provided on the machine frame 11, a mount table 18 for a potentiometer 17a provided on the upper bolster 9, and racks 19a and 19b mounted on the upper and lower auxiliary ram 7, 8 respectively, which racks are meshed with pinions 20a and 20b respectively, mounted on the ends of the shafts of the potentiometers 17a and 17b.
  • the control circuit for the press includes amplifiers 21a and 21b, electromagnetically operable servo valves 22a and 22b, which are included in the hydraulic circuits for the upper and lower auxiliary rams 7 and 8, respectively, and a template 24 that is movable along an arrowed dash-dot line C-C and whose profile is designed according to a programme for the positional control of the punches 4 and 5.
  • Reference numerals 25a and 25b designate potentiometers which are associated, at their shaft ends, with pinions 26a and 26b meshed with racks 27a and 27b respectively.
  • each rack 27a and 27b has a roller 28a and 28b respectively serving as a cam follower, the other end of each rack being slidably supported by a rack guide 29a, 29b respectively.
  • the racks 27a and 27b are adapted to be urged against opposite, inclined side surfaces of the template 24 via their rollers 28a and 28b, respectively, by suitable resilient means not shown.
  • the potentiometer 17a which generates a voltage corresponding to the position of the upper auxiliary ram 7, can represent the extent of insertion of the upper punch 4 into the forging space defined by the dies 1 and 2.
  • the voltage generated by the potentiometer 17b indicates the extent of insertion of the lower punch 5 into the space formed by the dies 1 and 2.
  • the voltages generated by the potentiometers 17a and 17b respectively, are compared in comparator circuits X l and X 2 with programmed reference voltages generated by a programmed reference voltage generator 23 consisting of the above-described template 24, potentiometers 25a and 25b, pinions 26a and 26b, racks 27a and 27b, rollers 28a and 28b and rack guides 29a and 29b, and the difference signals issued from the comparator circuits X 1 and X 2 are amplified by the amplifiers 21a and 21b and then applied to the signal inputs of the servo valves 22a and 22b, respectively.
  • the servo valves 22a and 22b are actuated to drive the upper auxiliary ram 7 and the lower auxiliary ram 8 by means of the respective hydraulic pressure sources 12a-14a and 12b-14b so that the difference between the programmed reference voltages and the voltages generated by the potentiometers 17a and 17b may be nulled. Accordingly, the positions of the upper and lower punches 4 and 5 can be continuously controlled in accordance with the programmed reference voltages issued from the programmed reference voltage generator 23.
  • the successive reference voltages corresponding to the desired positions of the upper and lower punches 4 and 5 are generated in accordance with the profile of the template 24. Therefore, if the profile of the template 24 is appropriately designed from the position for start of a forging operation up to the position for termination of the forging operation,and if the template 24 is moved in the direction of arrow D in Figure 4 during the forging operation from the forging start position up to the forging termination position, then it becomes possible to control continuously the positions of the upper and lower punches 4 and 5 during the entire forging process.
  • the movements or positions of the punches can be continuously controlled during the forging process from the forging start position up to the forging termination position, the mode of deformation flow of the workpiece is always kept constant, and as a result, excellent forged products having good quality and high precision in dimensions can be obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
EP80303412A 1980-09-29 1980-09-29 Präzisions-Schmiedepresse Expired EP0048776B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP80303412A EP0048776B1 (de) 1980-09-29 1980-09-29 Präzisions-Schmiedepresse
DE8080303412T DE3065700D1 (en) 1980-09-29 1980-09-29 Precision forging press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80303412A EP0048776B1 (de) 1980-09-29 1980-09-29 Präzisions-Schmiedepresse

Publications (2)

Publication Number Publication Date
EP0048776A1 true EP0048776A1 (de) 1982-04-07
EP0048776B1 EP0048776B1 (de) 1983-11-23

Family

ID=8187265

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80303412A Expired EP0048776B1 (de) 1980-09-29 1980-09-29 Präzisions-Schmiedepresse

Country Status (2)

Country Link
EP (1) EP0048776B1 (de)
DE (1) DE3065700D1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570020A1 (fr) * 1984-09-11 1986-03-14 Commissariat Energie Atomique Presse automatique
AT391822B (de) * 1988-02-06 1990-12-10 Eumuco Ag Fuer Maschinenbau Mehr-stoessel-schmiedemaschine
CN102189210A (zh) * 2011-05-16 2011-09-21 沈阳三重机械有限公司 锻件自动对中装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2819167A1 (de) * 1977-05-06 1978-11-16 Supervis Verfahren zur herstellung eines werkstueckes durch fliesspressen, anwendung des verfahrens und vorrichtung zur durchfuehrung des verfahrens

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB843394A (en) * 1956-09-29 1960-08-04 Loewy Eng Co Ltd Remote positional control for hydraulic presses
GB857485A (en) * 1958-05-12 1960-12-29 Schloemann Ag Improvements in the control of hydraulic forging presses
DE1427298B1 (de) * 1960-08-31 1970-01-22 British Iron Steel Research Anzeigevorrichtung fuer eine hydraulische Freiformschmiedepresse
DE1234487B (de) * 1961-08-10 1967-02-16 Schloemann Ag Steuerung von Freiformschmiedepressen
DD124279A1 (de) * 1975-12-23 1977-02-16

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2819167A1 (de) * 1977-05-06 1978-11-16 Supervis Verfahren zur herstellung eines werkstueckes durch fliesspressen, anwendung des verfahrens und vorrichtung zur durchfuehrung des verfahrens

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2570020A1 (fr) * 1984-09-11 1986-03-14 Commissariat Energie Atomique Presse automatique
US4718842A (en) * 1984-09-11 1988-01-12 Philippe Labbe Automatic press for controlling the force on each movable plate
AT391822B (de) * 1988-02-06 1990-12-10 Eumuco Ag Fuer Maschinenbau Mehr-stoessel-schmiedemaschine
CN102189210A (zh) * 2011-05-16 2011-09-21 沈阳三重机械有限公司 锻件自动对中装置

Also Published As

Publication number Publication date
DE3065700D1 (en) 1983-12-29
EP0048776B1 (de) 1983-11-23

Similar Documents

Publication Publication Date Title
EP0867271B1 (de) Hydraulische Presse zur Herstellung von Metallplatten
DE69807321T2 (de) Verfahren und stützkern zum einhalsen von dosen
EP0388610B1 (de) Pressen-Anlage mit mehreren Pressen zum Bearbeiten von Blechteilen
EP0059432A2 (de) Presse
DE3840395A1 (de) Verfahren und vorrichtung zum steuern eines hubes einer presse
US4779443A (en) Complex pressing die apparatus
DD145234A5 (de) Stanzpresse und herstellungsverfahren von mit verschluessen versehenen dosenboeden
EP0048776A1 (de) Präzisions-Schmiedepresse
KR0154100B1 (ko) 절곡기의 공구위치 제어장치
DE19624036A1 (de) Verfahren und Werkzeugsystem zum pneumomechanischen Tiefziehen
EP0629455B1 (de) Stauchpressenhauptantrieb
US5613396A (en) Index-feed machining system
DE102020127815A1 (de) Ziehkissenvorrichtung und verfahren zur steuerung der ziehkissenvorrichtung
DE102005034256A1 (de) Ziehkissenvorrichtung einer Presse
KR102681039B1 (ko) 하프 드로잉 프레스 및 그 제어방법
CN217315372U (zh) 一种t型角钢横板冲切模具
DE10329898B4 (de) Verfahren und Vorrichtung zum Umformen von Blechplatinen
JPS6125449B2 (de)
DE3230930C2 (de)
EP0549955A1 (de) Verfahren zum Formen von Blech unter hydraulischem Druck
DE3906958A1 (de) Verfahren zur herstellung von flachen bauteilen
DE10302458A1 (de) Maschine und Verfahren zur Massivumformung
EP3052257B1 (de) Vorrichtung zum umformen eines werkstückes aus blech
DE10030792C2 (de) Mehrstufenpresse, insbesondere Quertransportpresse, mit hydraulischer Schließvorrichtung
JP2960948B2 (ja) パンチプレス機の液圧プレス駆動装置の制御方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19811021

AK Designated contracting states

Designated state(s): DE FR GB IT

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 3065700

Country of ref document: DE

Date of ref document: 19831229

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840918

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19840929

Year of fee payment: 5

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19860530

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19860603

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118