EP0597212A1 - Procédé de commande d'une poinçonneuse pendant le démarrage et l'arrêt - Google Patents

Procédé de commande d'une poinçonneuse pendant le démarrage et l'arrêt Download PDF

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Publication number
EP0597212A1
EP0597212A1 EP93114981A EP93114981A EP0597212A1 EP 0597212 A1 EP0597212 A1 EP 0597212A1 EP 93114981 A EP93114981 A EP 93114981A EP 93114981 A EP93114981 A EP 93114981A EP 0597212 A1 EP0597212 A1 EP 0597212A1
Authority
EP
European Patent Office
Prior art keywords
eccentric shaft
punch press
starting
operating
angle
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
EP93114981A
Other languages
German (de)
English (en)
Other versions
EP0597212B1 (fr
Inventor
Oskar Eigenmann
Helmut Messner
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.)
Bruderer AG
Original Assignee
Bruderer AG
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 Bruderer AG filed Critical Bruderer AG
Publication of EP0597212A1 publication Critical patent/EP0597212A1/fr
Application granted granted Critical
Publication of EP0597212B1 publication Critical patent/EP0597212B1/fr
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
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0064—Counterbalancing means for movable press elements
    • 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
    • B30B1/26—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 cams, eccentrics, or cranks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/04—Frames; Guides
    • B30B15/041—Guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/14—Control arrangements for mechanically-driven presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/14—Control arrangements for mechanically-driven presses
    • B30B15/144—Control arrangements for mechanically-driven presses for stopping the press shaft in a predetermined angular position

Definitions

  • the invention relates to a method for operating a punch press when starting and stopping the same, which punch press is driven by a positionable drive via the clutch unit of a clutch / brake device, an eccentric shaft, a ram driven by the eccentric shaft for carrying at least one upper tool and a press table for carrying at least one Has lower tool, by means of which tools a strip-shaped workpiece arranged in between is machined, which punching press passes through a starting angle due to the overall moment of inertia of the moving components and the drive torque transmitted by the coupling unit to the eccentric shaft for acceleration from standstill to the operating stroke number and the contact between the tools and the belt starts at a given working angle position of the eccentric press.
  • the manufacturing accuracy of a stamped product is heavily dependent, among other things, on the respective ram height of the machine. As is generally known, this ram height determines the tool closing height or the immersion depth when the machine is in operation.
  • an unchanging ram height is specified for given embossing and cutting work at a given number of strokes, e.g. with a smaller number of strokes the embossments are not deep enough, with a higher number of strokes the embossments are too deep or the immersion depth of the tool stamps is too large, which is known to lead to undesirably large wear of the corresponding tool parts.
  • the eccentric shaft is drive-connected by closing the clutch with the drive located at the operating stroke number, in particular the flywheel, and thus accelerated from standstill to the operating speed.
  • the dynamic behavior of the punch press during the first machining process e.g. The punching process is defined as the first punch behavior, and it is this first punch behavior that determines the quality of the first punched part.
  • the first punch behavior is such that the first punching process does not take place with the number of operating strokes like the subsequent punching processes, i.e. that the dynamic behavior of the machine is not the same for the first and subsequent strokes, which has a negative effect on the accuracy of the first part.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of creating a method for operating a punch press when starting and stopping the same, in which after the stop has been completed, the eccentric shaft is rotated back into a starting angle position according to which it is started up again after passing through of the approach angle for accelerating to the operating stroke number is on the operating stroke number before the first machining contact takes place between the tool and the workpiece.
  • the advantages achieved by the invention are essentially to be seen in the fact that the first punch stroke takes place with a dynamic behavior of the punch press which is the same as the dynamic behavior in continuous operation. This means that when starting up, the strip to be processed is precisely machined during the first machining stroke, so that no rejects are produced.
  • Figure 1 shows schematically a punch press. It has a positionable drive 1.
  • This drive 1 contains an electric motor which can be controlled in any desired angular position and which drives the flywheel of the high-speed punch press according to generally known designs via a belt drive.
  • the flywheel is connected to a clutch / brake device 2, 3, which in turn is connected to the eccentric shaft 5, which is mounted in the machine frame 4.
  • the clutch / brake device 2, 3 has a clutch unit 2, by means of which the eccentric shaft 5 can be coupled or uncoupled from the drive 1, or its flywheel, and has a brake unit 3 with a brake disc 14, via which Brake disc 14, the eccentric shaft 5 can be braked against the machine housing 4. Details of this braking device can be found in CH-A-546 141 and US-A-3 805 931. It should be noted here that the clutch unit 2 and the brake unit 3 are non-positive designs, i.e. they grind when engaging or braking.
  • Reference numeral 11 generally designates the balance weight arrangement for balancing the rotating and oscillating forces occurring during the operation of the punch press.
  • the eccentric shaft rotates through all angular positions of a 360 ° angle and can obviously assume any angular position at a standstill driven by the positionable drive.
  • An upper dead center UD and a lower dead center LD are generally defined for the eccentric shafts 5 of the punch presses, the articulation point of the connecting rod (s) on the eccentric shaft 5 being taken as the structural reference.
  • the ram 7 has the largest distance from the press table 10 at the top dead center UD and the smallest distance at the bottom dead center UT.
  • a punch press is usually shut down or positioned approximately at top dead center UD.
  • the distance between the ram 7 and the press table 10 has the greatest value, the tool (consisting of upper tool 8 and lower tool 9) is open.
  • the clutch unit 2 is opened and the brake 3 is closed, i.e. the eccentric shaft 5 is uncoupled from the drive 1, the drive 1 with the flywheel idling at the operating speed and the crankshaft 5 stopped.
  • the abscissa relates to the angular position a of the eccentric shaft 5, the ordinate to the speed n of the same.
  • n B is above n A , i.e. nB n A , which property prevails in high-speed punch presses
  • a starting angle a B that is greater than a A is required if the same dynamic conditions as for the subsequent ones are used for the first punching Punchings should prevail.
  • a reduction in the number of strokes may only be initiated after passing through the bottom dead center LD, the complete standstill before a 360 ° rotation before the tool and the metal strip have come into contact.
  • both the approach angle a B and, accordingly, the braking angle can be calculated in a control unit for the punch press.
  • f B may at most be so large that reaching bottom dead center LD and thus further punching is avoided.
  • a punch press is stopped at top dead center UD so that it can be manipulated in the open tool.
  • the press can thus be stopped at top dead center UD when rotating back from point C to point D (intermediate stop).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Presses (AREA)
  • Press Drives And Press Lines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP93114981A 1992-11-11 1993-09-17 Procédé de commande d'une poinçonneuse pendant le démarrage et l'arrêt Expired - Lifetime EP0597212B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3479/92 1992-11-11
CH347992 1992-11-11

Publications (2)

Publication Number Publication Date
EP0597212A1 true EP0597212A1 (fr) 1994-05-18
EP0597212B1 EP0597212B1 (fr) 1996-04-10

Family

ID=4256866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114981A Expired - Lifetime EP0597212B1 (fr) 1992-11-11 1993-09-17 Procédé de commande d'une poinçonneuse pendant le démarrage et l'arrêt

Country Status (7)

Country Link
US (1) US5522244A (fr)
EP (1) EP0597212B1 (fr)
JP (1) JPH06210500A (fr)
AT (1) ATE136497T1 (fr)
DE (1) DE59302184D1 (fr)
ES (1) ES2088619T3 (fr)
SG (1) SG48725A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884811A1 (fr) * 1997-06-12 1998-12-16 komax Holding AG Procédé et dispositif pour la réalisation de connexions de sertissage
EP0953438A1 (fr) * 1998-04-30 1999-11-03 Bruderer Ag Presse à estamper, en particulier presse rapide
US6418768B2 (en) 1997-06-12 2002-07-16 Komax Holding Ag Method and apparatus for producing a crimp connection
EP1582337A1 (fr) * 2004-03-30 2005-10-05 Haulick + Roos GmbH Presse, presse de poinçonnage ou dispositif de formage

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5868020A (en) * 1997-04-29 1999-02-09 Allen-Bradly Company, Llc Brake time monitor and brake control system for a press having a programmable controller
EP1202404B1 (fr) * 2000-10-30 2011-05-18 Komax Holding AG Méthode et machine à sertir
US6487885B2 (en) 2000-10-30 2002-12-03 Komax Holding Ag Method and apparatus for producing a crimped connection
CN102814389B (zh) * 2012-07-20 2015-04-22 芜湖电工机械有限公司 用于冲槽机上的滑块提升机构
US11084240B2 (en) * 2015-11-20 2021-08-10 Sms Group Gmbh Path-controlled press having a sliding block

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2414435A1 (de) * 1974-03-26 1975-10-16 Weingarten Ag Maschf Vorrichtung zum stellungsgenauen stillsetzen der kurbelwelle einer nutenstanzmaschine
DE2853143A1 (de) * 1978-02-09 1979-08-16 Komatsu Mfg Co Ltd Verfahren und vorrichtung zur bremszeitpunkts-steuerung
JPS6064799A (ja) * 1983-09-19 1985-04-13 Kiyouri Kogyo Kk プレス用定位置停止装置
US4653311A (en) * 1986-01-31 1987-03-31 Avondale Industries, Inc. Short stroke press with automated feed mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3888097A (en) * 1974-04-11 1975-06-10 Minster Machine Co Machine having a drive shaft and a method of operation
JPS5829600A (ja) * 1981-08-12 1983-02-21 株式会社　アマダ マイクロコンピユ−タによるプレスの制御装置
JPS6123530A (ja) * 1984-07-12 1986-02-01 Mitsubishi Electric Corp タレツトパンチプレス用数値制御装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2414435A1 (de) * 1974-03-26 1975-10-16 Weingarten Ag Maschf Vorrichtung zum stellungsgenauen stillsetzen der kurbelwelle einer nutenstanzmaschine
DE2853143A1 (de) * 1978-02-09 1979-08-16 Komatsu Mfg Co Ltd Verfahren und vorrichtung zur bremszeitpunkts-steuerung
JPS6064799A (ja) * 1983-09-19 1985-04-13 Kiyouri Kogyo Kk プレス用定位置停止装置
US4653311A (en) * 1986-01-31 1987-03-31 Avondale Industries, Inc. Short stroke press with automated feed mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 202 (M - 405)<1925> 20 August 1985 (1985-08-20) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884811A1 (fr) * 1997-06-12 1998-12-16 komax Holding AG Procédé et dispositif pour la réalisation de connexions de sertissage
US6418768B2 (en) 1997-06-12 2002-07-16 Komax Holding Ag Method and apparatus for producing a crimp connection
EP0953438A1 (fr) * 1998-04-30 1999-11-03 Bruderer Ag Presse à estamper, en particulier presse rapide
EP1582337A1 (fr) * 2004-03-30 2005-10-05 Haulick + Roos GmbH Presse, presse de poinçonnage ou dispositif de formage

Also Published As

Publication number Publication date
SG48725A1 (en) 1998-05-18
EP0597212B1 (fr) 1996-04-10
DE59302184D1 (de) 1996-05-15
ES2088619T3 (es) 1996-08-16
JPH06210500A (ja) 1994-08-02
ATE136497T1 (de) 1996-04-15
US5522244A (en) 1996-06-04

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