EP0062562B1 - 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 PDFInfo
- Publication number
- EP0062562B1 EP0062562B1 EP82400526A EP82400526A EP0062562B1 EP 0062562 B1 EP0062562 B1 EP 0062562B1 EP 82400526 A EP82400526 A EP 82400526A EP 82400526 A EP82400526 A EP 82400526A EP 0062562 B1 EP0062562 B1 EP 0062562B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- draw ring
- rod
- slider
- jack
- 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.)
- Expired
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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 .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.
- 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 prevent them from falling during the ascent of the main slide during the adjustment phases.
- the upward return of the backgrounds is provided by the main slide by means of tie rods passing through the latter. These are screwed at their lower end to the clamp and are supported by a shoulder of 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, mounting and adjustment.
- the advantage of the invention resides in the fact that, thanks to the presence of a hold-down slide and of hydraulic jacks arranged between this slide and the hold-down itself, the length of the rods can be adjusted quickly. .
- the invention also relates to a method for automatically adjusting the pushers of a stamping press: according to claim 4. Thanks to this method, it is no longer necessary to disassemble, reassemble and adjust the pushers at each change of tooling. . 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 ordered 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 it -same 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 adjustment 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 slide 6. These tie rods ensure the raising of the blank holder by raising the slide 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 push rod retaining rods 22 are introduced at their upper part.
- This tooling is composed as it was said previously, of a die 14, a punch 16 and a blank holder 20 The main slide 6 is lowered 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 make a setting 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 greenhouse - blank. 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 bush 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 unblocking > cage 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 locking system which can be used with satisfaction in a press of the invention.
- the blank holder slide 8 has, at its lower part, stops 32 intended to provide a clearance between the lower part of the blocking and unblocking device 28 and the upper face of the stamping slide 6.
- the slide 8 being in abutment, the rods of the jacks 24 are released and they are brought down into abutment on the clamp blank 20.
- This blank holder comprises a rapid locking and unlocking device 33 of 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 bush 30.
- This pressure cancellation simultaneously in the bush and in the actuator is controlled by a pressure switch, when the actuator supply pressure 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 reassemble it in the high position, as shown in FIG. 3, and to block it in this position by means of the device 28 for automatic locking and unlocking. 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)
Claims (5)
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 EP0062562A1 (de) | 1982-10-13 |
EP0062562B1 true 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) |
Families Citing this family (19)
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. |
DE4100716A1 (de) * | 1991-01-14 | 1992-07-16 | Erfurt Umformtechnik Gmbh | Einrichtung zum blechhalten in einfachwirkenden pressen |
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 |
US9221092B2 (en) | 2006-09-01 | 2015-12-29 | 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 |
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 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2300162A (en) * | 1938-05-13 | 1942-10-27 | Dominion Eng Works Ltd | Hydraulic press |
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 |
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 |
US3453848A (en) * | 1965-06-07 | 1969-07-08 | Dro Eng Co Di | Apparatus for deep drawing metal with hydraulically controlled dies |
JPS519210Y2 (de) * | 1971-10-29 | 1976-03-11 | ||
JPS5126682Y2 (de) * | 1971-10-29 | 1976-07-07 | ||
JPS519212Y2 (de) * | 1971-10-29 | 1976-03-11 | ||
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 |
-
1981
- 1981-04-01 FR FR8106526A patent/FR2502994A1/fr active Granted
-
1982
- 1982-03-22 US US06/360,842 patent/US4483173A/en not_active Expired - Fee Related
- 1982-03-23 AT AT82400526T patent/ATE13983T1/de not_active IP Right Cessation
- 1982-03-23 EP EP82400526A patent/EP0062562B1/de not_active Expired
- 1982-03-23 DE DE8282400526T patent/DE3264389D1/de not_active Expired
- 1982-03-31 JP JP57053651A patent/JPS57177839A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0062562A1 (de) | 1982-10-13 |
DE3264389D1 (en) | 1985-08-01 |
JPS57177839A (en) | 1982-11-01 |
FR2502994B1 (de) | 1983-07-01 |
ATE13983T1 (de) | 1985-07-15 |
FR2502994A1 (fr) | 1982-10-08 |
US4483173A (en) | 1984-11-20 |
JPH0250814B2 (de) | 1990-11-05 |
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