EP0062562A1 - Verfahren und Vorrichtung zur automatischen Steuerung der Stössel einer Presse mittels selbstblockierender Kolben-Zylinder-Einheit - Google Patents

Verfahren und Vorrichtung zur automatischen Steuerung der Stössel einer Presse mittels selbstblockierender Kolben-Zylinder-Einheit Download PDF

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Publication number
EP0062562A1
EP0062562A1 EP82400526A EP82400526A EP0062562A1 EP 0062562 A1 EP0062562 A1 EP 0062562A1 EP 82400526 A EP82400526 A EP 82400526A EP 82400526 A EP82400526 A EP 82400526A EP 0062562 A1 EP0062562 A1 EP 0062562A1
Authority
EP
European Patent Office
Prior art keywords
blank holder
slide
pushers
rod
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
EP82400526A
Other languages
English (en)
French (fr)
Other versions
EP0062562B1 (de
Inventor
Gérard Duhamel
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.)
Airbus Group SAS
Original Assignee
Airbus Group SAS
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 Airbus Group SAS filed Critical Airbus Group SAS
Priority to AT82400526T priority Critical patent/ATE13983T1/de
Publication of EP0062562A1 publication Critical patent/EP0062562A1/de
Application granted granted Critical
Publication of EP0062562B1 publication Critical patent/EP0062562B1/de
Expired 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • B21D24/14—Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically

Definitions

  • the present invention relates to an automatic adjustment device for the pushers of a stamping press. It also relates to a method of using this device.
  • Hydraulic stamping presses are used to stamp hollow parts from metal blanks.
  • a press consists of a frame, a table on which the die is fixed, a main slide which moves in translation relative to the table along slides. This slide carries a punch of shape complementary to that of the imprint of the matrix. Forming without removing metal is carried out in a tool that is not part of the machine. The closing, working, and opening movement of the tooling at the required forming pressure takes place via a hydraulic cylinder.
  • a blank holder arranged between the table and the main slide has the function of keeping the sheet blank tight against the die during the stamping operation.
  • This blank holder also moves in translation relative to the table, in order to allow the press to be fed with stamped parts and the evacuation of stamped parts.
  • the necessary clamping force exerted on the blank holder by a blank press slide located above the main slide is transmitted by pushers.
  • These pushers are in the form of elongated rods passing through the main slide and supported at their upper end under the hold-down slide and at their lower end on the hold-down itself.
  • Cross rods are placed in the pushers to avoid their fall during the ascent of the main slide during the adjustment phases.
  • the upward return of the hold-down clamps is ensured by the main slide by means of tie rods passing through the latter. These are screwed at their lower end to the blank holder and are supported by a shoulder from their upper end on the main slide.
  • the invention provides a solution. It relates to an automatic adjustment device for the pushers of a stamping press which eliminates their handling, assembly and adjustment.
  • the stamping press comprises in a known manner a table on which is clamped a die, a blank holder located above the table, a main slide which moves vertically in relation port to the table and on which a punch is clamped, a blank holder slide, pushers secured at one of their ends, the blank holder and at their other end, secured to the blank holder slide, these pushers being intended to transmit the clamping force of the blank holder slide to the blank holder.
  • each of the pushers consists of the rod of a jack mounted on the hold-down slide, this jack being provided with a length adjustment device by feeler, lockable and unblockable automatically, the rods their lower end comprising quick locking means on the blank holder.
  • the invention also relates to a method for automatically adjusting the pushers of a stamping press. Thanks to this process, it is no longer necessary to dismantle, reassemble and adjust the pushers at each tool change. It suffices to lock in the high position the push rods which are not used with a specific blank press. Thanks to a programmable automaton, the selection of the pushers to be used and the display of the stamping parameters can be easily automated.
  • FIG. 1 a stamping press according to the prior art of this type.
  • This press consists of a frame 2, a table 4, a main slide 6 and a hold-down slide 8.
  • the main slide is controlled by the main cylinder 10.
  • the hold-down slide 8 is controlled by at least two cylinders 12 with plunger.
  • the matrix 14 is clamped on the table 4.
  • a press of this type is called a "double-acting press" because it has two different slides actuated by two separate jack systems.
  • a triple-acting stamping press has the same elements that perform the same functions. There is only added an upward movement located under the table 4.
  • the punch 16 is fixed to the main slide 6, also called stamping slide.
  • the sheet blank to be stamped 18 is placed on the die 14.
  • the blank holder 20 has the function of clamping the sheet blank 18 during the stamping operation. It is controlled by means of pushers 22 interposed between itself and the blank holder slide.
  • the two jacks 12 bring the slide 8 into abutment against the main slide 6.
  • the force transmitted by the pushers 22 to the blank holder 20 therefore depends on the setting of the length of these pushers. This adjustment is made using shims and requires great precision.
  • tie rods 22a are slidably mounted in bores made in the main slide 6 and are screwed at their lower end into the blank holder 20 while their upper end carries a shoulder which prevents them from crossing the main slider 6: These tie rods ensure the raising of the blank holder by raising the slider 6.
  • buttons are carried out as follows. First of all, the stamping slide 6 is lowered onto the table 4 (see FIG. 1, half-view on the right); the pushers 22 are introduced inside the orifices 7 provided for this purpose in the slide. The rods retaining rods 22 are introduced at their upper part.
  • This tooling is composed as it was said before cedent, a die 14, a punch 16 and a blank holder 20. We descend the main slide 6 in contact with the tool.
  • This main slide is then in the position it will occupy during normal press operation at the end of the stamping operation, to the thickness of the blank.
  • the punch is flanged on the underside of the main slide and the die on the table 4. It remains to perform a wedging between the upper end of the pushers 22 and the underside of the hold-down slide 8 to make up for the play of wear.
  • the stamping slide 6 and the blank holder slide 8 are then reassembled via the tie rods 22a. The press is then ready to work.
  • FIG. 2 shows a stamping press according to the invention, which makes it possible to considerably reduce the duration of the operations for adjusting the pushers.
  • the general construction of this press is similar to that of FIG. 1. It comprises a frame 2, a table 4, a stamping slide 6 and a blank clamp slide 8.
  • the tool that is to say the die 14, the punch 16, and the blank holder 20 is identical.
  • the pushers which transmit the clamping force of the blank holder slide 8 to the blank holder 20, designated by the reference 22 in FIG. 1, here consist of the rods 24 of the jacks 26 mounted vertically on the blank holder slide 8.
  • the rods 24 of these jacks there is an automatic locking and unlocking device 28.
  • the rod 24 has a quick locking system on the blank holder. This system can be automatic.
  • the means for locking and unlocking the rod 24 of the jack 26 are shown on an enlarged scale in FIG. 3. They are preferably constituted by a sleeve 30 which surrounds the rod 24; by means of the sleeve 30, it is possible to tighten and loosen the rod 24 in such a way that the friction forces lock it in its position.
  • the blocking of the rod 24 is effected when a hydraulic pressure is exerted outside the sleeve 30.
  • the unblocking is then effected by lack of pressure.
  • a reverse locking system is used in which the sleeve 30 has an internal bore whose diameter is less than that of the rod 24. This gives a friction connection due to the elastic deformation of the materials present.
  • the release is obtained by a hydraulic pressure applied uniformly inside the sleeve 30 between the two contact surfaces.
  • the "auto-lock" system manufactured and marketed by the Quiri Company is an automatic blocking system which can be used with satisfaction in a press of the invention.
  • the punch 16 is flanged on the underside of this slide.
  • this clamping can be carried out by means of a hydraulic fast clamping device.
  • the travel of the blank holder slide 8 is defined by stopping the main slide at top dead center in a position chosen according to the tooling. This position depends in particular on the thickness of the blank to be stamped.
  • the blank holder slide 8 Descend the blank holder slide 8 in abutment on the main slide.
  • the blank holder slide 8 has, at its lower part, stops 32 intended to provide a clearance between the lower part of the locking and unlocking device 28 and the upper face of the stamping slide 6.
  • the slide 8 being in abutment, the cylinder rods 24 are released and they are brought down into abutment on the blank holder 20.
  • This blank holder comprises a locking and quick unlocking device 33 from the end 24A. According to a variant, this locking 33 can be carried out automatically.
  • the hydraulic pressure inside the jack 26 increases rapidly, since the volume available for the fluid no longer increases. The detection of this increase in pressure makes it possible to develop a signal which on the one hand interrupts the low pressure hydraulic supply to the jack 26 and on the other hand blocks the rod 24 by means of the device 28.
  • the blocking of the rod 24 is obtained by means of a cancellation of the hydraulic pressure exerted inside the sleeve 30.
  • the pressure in the socket and in the cylinder is simultaneously controlled by a pressure switch, when the supply pressure of the cylinder reaches a predetermined threshold lower than the regulating pressure of the entire press.
  • the stamping slide 6 and the blank holder slide 8 are then raised to the high position.
  • the press is then ready to work.
  • the definition of the stroke of the pushers by probing allows automatic adjustment of the wear clearances at each adjustment.
  • FIG. 3 shows two different tools: on the one hand a matrix 14 and a blank holder 20, and on the other hand a matrix 14 'and a blank holder 20'.
  • a number of pushers for example the pushbutton 24 'are not used. It then suffices to raise it up, as shown in FIG. 3, and to block it in this position by means of the automatic locking and unlocking device 28. In the example shown, this blocking is effected by lack of pressure. Thanks to a programmable automaton, the selection of the pushers to be used and the display of the stamping parameters are automatic.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Forging (AREA)
  • Control Of Presses (AREA)
EP82400526A 1981-04-01 1982-03-23 Verfahren und Vorrichtung zur automatischen Steuerung der Stössel einer Presse mittels selbstblockierender Kolben-Zylinder-Einheit Expired EP0062562B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82400526T ATE13983T1 (de) 1981-04-01 1982-03-23 Verfahren und vorrichtung zur automatischen steuerung der stoessel einer presse mittels selbstblockierender kolben-zylinder-einheit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8106526 1981-04-01
FR8106526A FR2502994A1 (fr) 1981-04-01 1981-04-01 Procede et dispositif de reglage automatique des poussoirs d'une presse d'emboutissage au moyen de verins a tige autobloquante

Publications (2)

Publication Number Publication Date
EP0062562A1 true EP0062562A1 (de) 1982-10-13
EP0062562B1 EP0062562B1 (de) 1985-06-26

Family

ID=9256868

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82400526A Expired EP0062562B1 (de) 1981-04-01 1982-03-23 Verfahren und Vorrichtung zur automatischen Steuerung der Stössel einer Presse mittels selbstblockierender Kolben-Zylinder-Einheit

Country Status (6)

Country Link
US (1) US4483173A (de)
EP (1) EP0062562B1 (de)
JP (1) JPS57177839A (de)
AT (1) ATE13983T1 (de)
DE (1) DE3264389D1 (de)
FR (1) FR2502994A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671501A1 (fr) * 1991-01-14 1992-07-17 Erfurt Umformtechnik Gmbh Dispositif pour serrer des toles dans des presses a simple effet.

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2511501B1 (fr) * 1981-08-13 1986-11-21 Celette Sa Dispositif de pince destine a etre monte sur un marbre ou banc de controle des deformations eventuelles de la carrosserie d'un vehicule
DE59101219D1 (de) * 1990-04-23 1994-04-28 Mueller Weingarten Maschf Zieheinrichtung in einer Presse zum Ziehen von Blechformteilen.
US6647756B2 (en) * 2002-04-04 2003-11-18 Daimlerchrysler Corporation Draw die shoes
US7000446B2 (en) * 2004-03-05 2006-02-21 Daimlerchrysler Corporation Stamping press having four in one guide pin assembly
US8074486B1 (en) 2011-05-24 2011-12-13 Standard Lifters, Inc. Guided keeper assembly and method for metal forming dies
US7730757B2 (en) * 2006-09-01 2010-06-08 Standard Lifters, Llc Guided keeper assembly and method for metal forming dies
US9221092B2 (en) 2006-09-01 2015-12-29 Standard Lifters, Inc. Guided keeper assembly and method for metal forming dies
US7387006B1 (en) * 2006-12-12 2008-06-17 Ford Motor Company Sensing system for sheet metal forming tool
US8616038B2 (en) 2010-06-02 2013-12-31 Standard Lifters, Inc. Two-piece guide pin and method
US9272321B2 (en) 2010-06-14 2016-03-01 Standard Lifters, Inc. Guided keeper and method for metal forming dies
US8919178B2 (en) 2010-09-07 2014-12-30 Standard Lifters, Inc. Guided keeper and method for metal forming dies
US8910502B2 (en) 2010-09-07 2014-12-16 Standard Lifters, Inc. Guided keeper and method for metal forming dies
US9248491B2 (en) 2011-02-21 2016-02-02 Standard Lifters, Inc. Guided keeper assembly and method for metal forming dies
US8939005B2 (en) 2012-03-15 2015-01-27 Standard Lifters, Inc. Guide pin assembly for metal forming dies and method
WO2015077585A1 (en) 2013-11-22 2015-05-28 Standard Lifters, Inc. Guide pin head
CN105013926A (zh) * 2014-04-29 2015-11-04 上汽通用五菱汽车股份有限公司 一种液压冲孔装置
US10954984B2 (en) 2016-11-30 2021-03-23 Standard Lifters, Inc. Collar and shaft assembly
US11344943B2 (en) 2019-09-05 2022-05-31 Standard Lifters, Inc. Modular guided keeper base

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB533178A (en) * 1938-10-17 1941-02-07 Howard Francis Macmillin Improvements in or relating to presses for drawing sheet metal or the like
US2283356A (en) * 1939-03-27 1942-05-19 Hydraulic Dev Corp Inc Method of drawing
US3453848A (en) * 1965-06-07 1969-07-08 Dro Eng Co Di Apparatus for deep drawing metal with hydraulically controlled dies

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2300162A (en) * 1938-05-13 1942-10-27 Dominion Eng Works Ltd Hydraulic press
GB533172A (en) * 1939-10-13 1941-02-07 Westminster Photographic Excha Improvements in photographic cameras
US2350884A (en) * 1940-03-29 1944-06-06 Hydraulic Dev Corp Inc Blank holder and die cushion cylinder having separate adjustable pressures
US2745366A (en) * 1952-06-10 1956-05-15 Birdsboro Steel Foundry & Mach Hydraulic press
US3147723A (en) * 1961-05-24 1964-09-08 Dro Engineering Company Di Hydraulic control system for die pads in presses
JPS519210Y2 (de) * 1971-10-29 1976-03-11
JPS519212Y2 (de) * 1971-10-29 1976-03-11
JPS5126682Y2 (de) * 1971-10-29 1976-07-07
JPS529428B2 (de) * 1973-02-06 1977-03-16
JPS555136A (en) * 1978-06-26 1980-01-16 Yoshizaki Kozo Drawing machine
JPS558307A (en) * 1978-06-30 1980-01-21 Hideo Ichikawa Hydraulic press for deep drawing work
JPS5538636U (de) * 1978-08-30 1980-03-12

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB533178A (en) * 1938-10-17 1941-02-07 Howard Francis Macmillin Improvements in or relating to presses for drawing sheet metal or the like
US2283356A (en) * 1939-03-27 1942-05-19 Hydraulic Dev Corp Inc Method of drawing
US3453848A (en) * 1965-06-07 1969-07-08 Dro Eng Co Di Apparatus for deep drawing metal with hydraulically controlled dies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671501A1 (fr) * 1991-01-14 1992-07-17 Erfurt Umformtechnik Gmbh Dispositif pour serrer des toles dans des presses a simple effet.

Also Published As

Publication number Publication date
US4483173A (en) 1984-11-20
FR2502994B1 (de) 1983-07-01
ATE13983T1 (de) 1985-07-15
DE3264389D1 (en) 1985-08-01
EP0062562B1 (de) 1985-06-26
JPS57177839A (en) 1982-11-01
JPH0250814B2 (de) 1990-11-05
FR2502994A1 (fr) 1982-10-08

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