EP1870231A1 - Procédé de réglage du point mort bas du coulisseau pour ainsi que la presse, la presse de poinçonnage ou le dispositif de formage pour la mise en oeuvre dudit procédé - Google Patents

Procédé de réglage du point mort bas du coulisseau pour ainsi que la presse, la presse de poinçonnage ou le dispositif de formage pour la mise en oeuvre dudit procédé Download PDF

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Publication number
EP1870231A1
EP1870231A1 EP06013046A EP06013046A EP1870231A1 EP 1870231 A1 EP1870231 A1 EP 1870231A1 EP 06013046 A EP06013046 A EP 06013046A EP 06013046 A EP06013046 A EP 06013046A EP 1870231 A1 EP1870231 A1 EP 1870231A1
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EP
European Patent Office
Prior art keywords
dead center
bottom dead
pressing
forming machine
plunger
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.)
Withdrawn
Application number
EP06013046A
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German (de)
English (en)
Inventor
Markus Roos
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.)
Haulick and Roos GmbH
Original Assignee
Haulick and Roos GmbH
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 Haulick and Roos GmbH filed Critical Haulick and Roos GmbH
Priority to EP06013046A priority Critical patent/EP1870231A1/fr
Publication of EP1870231A1 publication Critical patent/EP1870231A1/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B30B15/0035—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height using an adjustable connection between the press drive means and the press slide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B30B15/0041—Control arrangements therefor
    • 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

Definitions

  • the invention relates to a method for adjusting the bottom dead center of the ram of a stamping, stamping or forming machine, which has a frame on which a rotatably driven eccentric shaft is mounted, the at least one connecting rod and at least one pushing means with a reciprocable Tappet is connected, wherein the thrust device is coupled for adjusting its effective length with an adjusting device and a thrust member which is connected via a rotary connection with an abutment and adjustable by rotation about its longitudinal axis relative to the abutment in the longitudinal direction, wherein during operation the machine detected by means of at least one first measuring device, the position of the bottom dead center of the plunger and compared with a target value and in the presence of a predetermined deviation, the thrust member in rotation.
  • the invention relates to a press, stamping or forming machine for carrying out the method with a frame on which a rotatably driven eccentric shaft is mounted, which is connected via at least one connecting rod and at least one pushing device with a reciprocable plunger, wherein the Pusher is coupled for adjusting its effective length with an adjusting device and comprises a thrust member which is connected via a rotary connection with an abutment and by rotation about its longitudinal axis relative to the abutment in the longitudinal direction adjustable, and at least a first measuring device for detecting the position of the lower Dead center of the plunger and with a control device for comparing the measured dead center position with a predetermined desired value, wherein the control device is coupled to the adjusting device.
  • Such pressing, stamping or forming machines are from the EP 1 582 337 A1 known. They enable a precise machining of a workpiece, which is positioned between an upper tool fixed to the ram and a lower tool fixed to a clamping plate of the pressing, punching or forming machine.
  • the plunger performs a reciprocating movement relative to the platen, wherein it is slidably supported on the frame.
  • the plunger is driven by the eccentric shaft, which is connected via at least one connecting rod and at least one thrust means arranged downstream of the connecting rod with the plunger and in turn is rotated by a drive motor. Temperature changes or due to acting mass forces can lead to a change in the position of the bottom dead center of the plunger. This can affect the quality of machined workpieces and tool life.
  • the position of the bottom dead center of the plunger can change.
  • this has an adjusting device which cooperates with at least one measuring device for detecting the position of the bottom dead center of the plunger.
  • the current position (actual value) of the bottom dead center of the plunger can be compared with a desired value, and in the presence of a predetermined deviation, for example, exceeds a predetermined tolerance value, the effective length of the thruster can be changed so that the actual value of the lower Dead center position can be approximated to the setpoint.
  • the pusher on a thrust member which is rotatable about its longitudinal axis and is connected via a rotary connection with an abutment.
  • the thrust member may be formed for example in the form of a push rod into which a holding rod connected to the connecting rod is screwed, as shown in the EP 1 582 337 A1 is described.
  • Object of the present invention is to provide a method and a press, stamping or forming machine of the type mentioned in such a way that the mechanical impairment of the rotary joint between the thrust member and the abutment can be reduced.
  • the idea flows in that can be kept extremely low by a play-free locking of the rotary joint between the thrust member and abutment, the mechanical impairment of the rotary connection during operation of the pressing, punching or forming machines.
  • the invention provides that the rotary connection is locked without play until a predetermined deviation of the bottom dead center position is detected. If this is the case, then the lock is released, that is, the rotary joint is released, so that by rotation of the thrust member relative to the abutment, the effective length of the thrust device can be adjusted. Subsequently, the rotary joint can be locked again to eliminate any play between the thrust member and the abutment.
  • the release of the lock is carried out according to the invention for a predetermined minimum release time, which may be for example a few seconds. Within this time, the thrust member can be rotated until the desired adjustment of the bottom dead center has occurred.
  • the release of the lock for a given minimum release time facilitates the control of the dead center. It can be ensured in a simple manner on the one hand that the locking of the rotary joint is interrupted only for the shortest possible time, but that on the other hand, the bottom dead center can be adjusted in a simple manner.
  • the provision of a predetermined minimum release time thus allows a cost-effective and highly reliable control of the position of the bottom dead center of the plunger during operation of the press, stamping or forming machines.
  • the thrust part when detecting a predetermined deviation of the bottom dead center position, the thrust part is only for a predetermined one Adjustment time set in rotation, which is smaller than the minimum release time, and if after the adjustment time still within the minimum release time detected the bottom dead center again and in the presence of a further predetermined deviation of the bottom dead center, the thrust member again rotated.
  • the adjustment time can be a fraction of the minimum release time.
  • the effective length of the pusher is changed by rotation of the pusher.
  • the actual value of the bottom dead center position is detected again and compared with a target value at still enabled rotary joint between the thrust member and abutment. If there is still a deviation between the actual value and the setpoint after a first adjustment of the thrust part, a further adjustment can take place immediately without the rotary connection having been previously locked. This allows a further simplification of the adjustment of the bottom dead center.
  • the minimum release time is restarted in the presence of a further predetermined deviation of the bottom dead center position.
  • the length of the adjustment time can be fixed, but it can also be provided that one measures the adjustment time as a function of the detected deviation between the actual value and the target value of the bottom dead center position. This has the advantage that with a larger deviation, a longer adjustment time can be selected than with a smaller deviation.
  • the adjustment time is maximally measured at about one quarter to one third of the minimum release time. This ensures that, after an adjustment process, a comparison can be carried out within the minimum release time between the actual value and the desired value of the position of the bottom dead center of the plunger.
  • the adjustment time is calculated to be approximately one tenth to one fifth of the minimum release time.
  • the adjustment time is maximally dimensioned at about 0.5 seconds, whereas the minimum release time may be, for example, 5 seconds.
  • the minimum release time is measured as a function of the number of strokes of the press, punching or forming machine. So can be provided be that you select a shorter minimum release time at higher stroke rate than at lower stroke rate.
  • a deviation of the actual value from the target value of the bottom dead center position can occur, in particular, during an acceleration phase of the machine, that is to say when the rotational speed of the eccentric shaft increases. It is advantageous if, by means of a second measuring device, the rotational speed of the eccentric shaft is detected and the rotational connection between the thrust part and the abutment releases when the rotational speed changes. A speed change is in particular when starting the pressing, punching or forming machines, since in this case the speed of the eccentric shaft increases continuously. If the lock between the thrust member and the abutment is released during this phase, this allows a continuous readjustment of the position of the bottom dead center of the ram during the starting process of the machine. If the machine has reached its standard speed, then there is a constant speed of the eccentric shaft and the rotary connection between the thrust member and the abutment can be locked without play after adjustment of the bottom dead center.
  • the invention also relates to a press, stamping or forming machine for carrying out the method explained above.
  • a press, stamping or forming machine of the type mentioned above the above-described object, the mechanical impairment reduce the rotational connection between the thrust member and the abutment, according to the invention solved in that the rotary connection between the thrust member and abutment by means of a locking device lockable and releasable upon detection of a predetermined deviation between the measured dead center and the desired value for a predetermined minimum release time.
  • a locking device is used.
  • the lock can be released for a predetermined minimum release time.
  • the thrust member can be rotated by means of the adjusting device about its longitudinal axis in rotation for adjusting the effective length of the thruster.
  • the thrust member upon detection of a predetermined deviation of the bottom dead center position, is only rotatable for a predetermined displacement time, wherein the adjustment time is less than the minimum release time, and after the adjustment time, the bottom dead center is detectable again and in the presence of a predetermined deviation of the bottom dead center the thrust part is again set in rotation. After a first adjustment process, the lower dead center position can thus be detected again. If there is still an intolerable deviation, then a new adjustment can be made without previously the rotary joint between the thrust member and abutment is locked.
  • the minimum release time can be resumed after the expiration of the adjustment time in the presence of a predetermined deviation of the bottom dead center.
  • the minimum release time is set in motion. Since the minimum release time is longer than the adjustment, it is ensured in a structurally simple manner that the rotary connection between the thrust member and the abutment is released when the adjustment is activated and thereby the thrust member is rotated.
  • the adjustment time is preferably dependent on the detected deviation of the bottom dead center position.
  • the adjustment time can be set automatically in such an embodiment by means of the control device of the machine, alternatively or additionally, it can be provided that the adjustment time can be manually specified via an input device.
  • the adjustment time is a maximum of about one quarter to one third of the minimum release time.
  • the adjustment time is approximately one tenth to one fifth of the minimum release time, as has already been explained above. It is particularly advantageous if the adjustment time is a maximum of about 0.5 seconds.
  • the minimum release time of the press, stamping or forming machine according to the invention is about 5 seconds in an advantageous embodiment.
  • the minimum release time is dependent on the number of strokes of the press, punching or forming machines.
  • the minimum release time can be set automatically by means of the control device. For example, it can be provided that the minimum release time is shorter with a larger number of strokes than with a smaller number of strokes.
  • the pressing, punching or forming machine has, in an advantageous embodiment, a second measuring device, wherein the rotary connection between the lifting part and the abutment can be released when the rotational speed changes.
  • the second measuring device like the first measuring device, is coupled to the control device, for example via an electrical line or a light pipe. If a change in the rotational speed of the eccentric shaft is detected by the second measuring device, the rotational connection between the thrust part and the abutment can automatically be released in order to be able to adjust the position of the bottom dead center of the plunger.
  • the effective length of the pusher can be easily adjusted to approximate the actual bottom dead center position to the desired setpoint.
  • the setpoint can be stroke-dependent. It is advantageous if the rotary connection between the thrust member and the abutment is releasable until the rotational speed of the eccentric shaft is constant.
  • the push member is designed as a push rod, which is connected via a rotary connection with the plunger.
  • the effective length of the pusher can thus be changed during operation of the press, stamping or forming machines. If a change is not required, then the rotary joint can be locked without play by means of the locking device. This increases the processing quality of the machine and its lifetime.
  • the adjusting device with the aid of which the thrust part can be set in rotation, is arranged in an advantageous embodiment of the invention on the upper part of the frame of the machine.
  • an arrangement is not absolutely necessary, it is also conceivable to position the adjusting device on the plunger.
  • the arrangement on the upper part of the frame has the advantage that the adjusting device is not subject to the reciprocating movement of the plunger so that the mechanical load on the adjusting device is reduced and transverse forces acting on the adjusting device can be transmitted directly to the frame.
  • the thrust part is preferably designed as a push rod.
  • the adjusting device it is expedient for the adjusting device to have a worm wheel which is connected in a rotationally fixed manner to the push rod and which meshes with a motor-driven worm.
  • the worm wheel is conveniently held axially immovably on the upper part of the frame of the machine.
  • the rotary connection between the thrust member designed as a push member and the plunger is preferably designed as a threaded connection. It is advantageous if the push rod carries in its end portion facing the plunger an external thread and is screwed into an abutment in the form of a rotatably held on the plunger threaded nut.
  • the rotary connection between the thrust member and the abutment can be locked according to the invention. It is advantageous if a controllable clamping element is arranged for play-free locking of the rotary joint on or in the plunger.
  • the clamping element is formed in an advantageous embodiment as an elastically deformable threaded nut.
  • the threaded nut is fixed on or in the ram and the thrust part is screwed into the threaded nut. To lock the connection, the threaded nut is elastically deformable.
  • the threaded nut for hydraulic deformation is acted upon hydraulically.
  • the threaded nut is surrounded by an annular space which can be acted upon by pressurized hydraulic fluid.
  • a hydraulic device can be used, which is coupled to the control unit of the pressing, stamping or forming machines.
  • an inventive press, stamping or forming machine 10 comprising a frame-like frame 12 with a frame base 14 and a Gestelloberteil 15.
  • the Gestelloberteil 15 is arranged by means of four in a horizontal plane at the vertices of a rectangle arranged stand 16 on Base frame 14 supported.
  • an eccentric shaft 18 is rotatably supported by a plurality of not shown in the drawing, known per se rolling or sliding bearing, which is rotatably driven by a known per se and therefore not shown in the drawing drive motor.
  • the eccentric shaft 18 serves to drive a plunger 20, which is coupled via two connecting rods 22, 23 and these respectively downstream thrust devices 24 and 25 with the eccentric shaft 18.
  • the embodiment of the identical thrust devices 24 and 25 will be described in more detail below using the example of the thrust device 24.
  • the plunger 20 is mounted in the usual manner by means of guide means not shown in the drawing, for example guide columns, displaceable in the vertical direction on the frame 12, so that it is in the direction of a arranged on the frame base 12 platen 27 can be moved back and forth.
  • the plunger 20 has an end face 28 which faces the platen 27.
  • Upper tools can be mounted on the end face 28 and lower tools can be mounted on the clamping plate 27 for machining workpieces which can be fed to the pressing, punching or forming machine 10 in a strip running plane 30 by means of feed devices which are known per se and therefore not shown in the drawing ,
  • the tape running plane forms the plane within which the workpieces to be processed are positioned during operation of the machine 10.
  • the connecting rods 22, 23 are rotatably mounted on the eccentric shaft 18 and hinged at its end remote from the eccentric shaft 18 to the thrusters 24 and 25 respectively.
  • the vertical movement of the connecting rods 22, 23 can be transmitted to the tappet 20 via the respectively associated pushing device 24 or 25.
  • the thrusters 24 and 25 each include a piston 37 which is slidably mounted in a guide member in the form of a guide cylinder 38.
  • the guide cylinder 38 is lined by a guide bush 39 which receives the piston 37.
  • the guide cylinder 38 is part of a transmission housing 41 which is fixed to the bottom 42 of the Gestelloberteils 15.
  • the gear housing 41 surrounds an adjusting device 44 with a worm wheel 45 and a worm 46 driving this, which meshes with the worm wheel 45 and is rotatably connected to a servomotor 47.
  • the pushers 24, 25 each comprise a push member in the form of a three-part push rod 51 with a rod upper part 52, a rod center part 53 and a rod base 54.
  • the rod upper part 52 is configured substantially mushroom or T-shaped and immersed with a rod head 56 in an associated Recording 57 of the piston 37, which is arranged on the connecting rod 22 and 23 facing away from the underside of the piston 37.
  • the rod head 56 is engaged by a bottom plate 58, which is screwed to the piston 37 and is surrounded in the circumferential direction by a lower-side collar 59 of the piston 37.
  • the rod upper part 52 is immovable on the piston 37 in the axial direction, but held freely rotatable about the longitudinal axis 61 of the push rod 51.
  • the rod upper part 52 of the worm wheel 45th surrounded, which by means of a known per se and therefore not shown in the drawing key rotatably connected to the upper pole part 52.
  • the bar middle part 53 adjoins the upper bar part 52, which is screwed to the upper bar part 52 and forms a sealing surface 63 on the outside.
  • the sealing surface 63 are two sealing rings 64, which is held in each case in an annular groove which is formed in a bottom trough 66 of the gear housing 41.
  • the rod middle part 53 is screwed to the rod base 54.
  • the latter carries in its the ram 20 facing end portion of an external thread 68, passes through a sleeve 70 and is screwed into a threaded nut 72 which is rotatably held in the plunger 20.
  • the threaded nut 72 forms a non-rotatable abutment which is rotatably connected via the external thread 68 with the push rod 51.
  • the threaded nut 72 is elastically deformable. It can be acted upon externally hydraulically for clamping and is surrounded for this purpose by an annular oil receiving space 73, which can be supplied by a hydraulic device 75 via a hydraulic main line 76 and a hydraulic branch line 77 and 78 under pressure hydraulic oil. This makes it possible to lock or release the rotary joint between the push rod 51 and the threaded nut 72 as needed.
  • the control device 84 is connected via first measuring lines 83, 85 with two first measuring devices 86, 87 in electrical connection, which are arranged in the region of mutually diagonally opposite uprights 16 and allow a non-contact determination of the position of the bottom dead center of the plunger 20.
  • Such measuring devices are those skilled in the art, for example from the EP 1 308 268 A1 known. However, the invention is not limited to those measuring devices which make a displacement measurement.
  • measuring devices with which the position of the bottom dead center of the plunger can be detected indirectly, for example by measuring the pressing force or other dimensional variable that corresponds to the position of the plunger.
  • Such measuring devices are used for example in the EP 1 177 885 A1 described.
  • control device 84 is connected to a second measuring device 90 in electrical connection, which detects the rotational speed of the eccentric shaft 18 without contact.
  • the plunger 20 can be driven to a reciprocating motion relative to the platen 27.
  • the eccentric shaft 18 is rotated. Due to their eccentric bearing, the connecting rods 22, 23 perform a reciprocating motion, which is transmitted via the piston 37 and the push rods 51 to the plunger 20.
  • the pistons 37 are displaceably mounted in the guide cylinders 38, so that occurring transverse forces can be transmitted from the connecting rod 22 and 23 via the piston 37 and the guide cylinder 38 on the Gestelloberteil 15, whereas vertical forces from the connecting rod 22 and 23 via the piston 37 and the push rod 51 are transmitted directly to the plunger 20.
  • the position of the bottom dead center of the plunger 20 is detected during operation of the pressing, stamping or forming machines 10 by means of the first measuring devices 86 and 87 and an electrical signal corresponding to the respective position is supplied to the control device 84 via the first measuring lines 83, 85 ,
  • the control device 84 has a comparison element, by means of which the actual value of the bottom dead center position can be compared with a predetermined desired value. If, for example, due to a change in temperature or due to acting mass forces to a change in the position of the bottom dead center of the plunger 20, the effective length of the thrusters 24, 25 can be changed during operation of the machine 10.
  • a control command is transmitted to the servo motor 47 via the signal line 82 after the control device 84 has previously issued via the signal line 81 to the hydraulic device 75 the command to release the locking of the rotary connection between the push rod 51 and the plunger 20 by removing hydraulic oil from the oil receiving space 73. Due to the output of the control command to the hydraulic device 75, the rotational connection between the push rod 51 and the plunger 20 for a minimum release time, which may be, for example, 5 seconds and depending on the number of strokes of the pressing, punching or forming 10 released.
  • the servo motor 47 is activated and thereby the push rod 51 about the longitudinal axis 61 in rotation and thus the plunger 20 is slightly displaced in the vertical direction, so that the actual value of the bottom dead center of the plunger 20 can be adapted to the predetermined setpoint.
  • the control unit 84 again issues a control command to the servo motor 47 after the hydraulic device 75 has been reactivated and the minimum release time has been restarted.
  • the pressing, punching or forming machine 10 thus enables a high-precision machining of workpieces, wherein the plunger 20 is connected during the machining of a workpiece clearance with the thrusters 24, 25, and wherein during the operation of the machine 10, the position of the lower Dead center of the plunger 20 can be readjusted by the rotational connection between the push rods 51 and the plunger 20 released for a minimum release time of the hydraulic device 75 and during the minimum release time of the actuator 47 is activated for a Verstellzeit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
EP06013046A 2006-06-23 2006-06-23 Procédé de réglage du point mort bas du coulisseau pour ainsi que la presse, la presse de poinçonnage ou le dispositif de formage pour la mise en oeuvre dudit procédé Withdrawn EP1870231A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06013046A EP1870231A1 (fr) 2006-06-23 2006-06-23 Procédé de réglage du point mort bas du coulisseau pour ainsi que la presse, la presse de poinçonnage ou le dispositif de formage pour la mise en oeuvre dudit procédé

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06013046A EP1870231A1 (fr) 2006-06-23 2006-06-23 Procédé de réglage du point mort bas du coulisseau pour ainsi que la presse, la presse de poinçonnage ou le dispositif de formage pour la mise en oeuvre dudit procédé

Publications (1)

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EP1870231A1 true EP1870231A1 (fr) 2007-12-26

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EP06013046A Withdrawn EP1870231A1 (fr) 2006-06-23 2006-06-23 Procédé de réglage du point mort bas du coulisseau pour ainsi que la presse, la presse de poinçonnage ou le dispositif de formage pour la mise en oeuvre dudit procédé

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7616690B2 (en) 2000-10-31 2009-11-10 Imec Method and apparatus for adaptive encoding framed data sequences
EP2119557A3 (fr) * 2008-05-12 2010-10-27 Aida Engineering, Ltd. Presse incluant une section de contrôle de correction de la position de point mort bas
DE102012014941B4 (de) * 2011-07-27 2019-08-08 Kabushiki Kaisha Yamada Dobby Presse

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0273604A1 (fr) * 1986-12-04 1988-07-06 Kabushiki Kaisha Kosmek Dispositif de réglage en hauteur d'un coulisseau de presse mécanique
EP0649733A1 (fr) * 1993-08-23 1995-04-26 Aida Engineering Ltd. Dispositif de correction de la position du point mort d'une presse mécanique
EP0659546A1 (fr) * 1993-12-27 1995-06-28 Aida Engineering Ltd. Dispositif de réglage de la position du point mort bas d'une presse mécanique
JP2002239799A (ja) * 2001-02-20 2002-08-28 Sumitomo Heavy Ind Ltd 鍛造プレスのシャットハイト調整方法
EP1258341A2 (fr) * 2001-05-17 2002-11-20 Aida Engineering, Ltd. Presse avec mécanisme de suspension
US20030200879A1 (en) * 2002-04-26 2003-10-30 Komatsu Ltd. Die height adjusting device for pressing machine
US20030217651A1 (en) * 2002-05-22 2003-11-27 Brewer W. Craig Method and apparatus for eliminating free clearances in a press shutheight adjustment mechanism
EP1582337A1 (fr) * 2004-03-30 2005-10-05 Haulick + Roos GmbH Presse, presse de poinçonnage ou dispositif de formage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0273604A1 (fr) * 1986-12-04 1988-07-06 Kabushiki Kaisha Kosmek Dispositif de réglage en hauteur d'un coulisseau de presse mécanique
EP0649733A1 (fr) * 1993-08-23 1995-04-26 Aida Engineering Ltd. Dispositif de correction de la position du point mort d'une presse mécanique
EP0659546A1 (fr) * 1993-12-27 1995-06-28 Aida Engineering Ltd. Dispositif de réglage de la position du point mort bas d'une presse mécanique
JP2002239799A (ja) * 2001-02-20 2002-08-28 Sumitomo Heavy Ind Ltd 鍛造プレスのシャットハイト調整方法
EP1258341A2 (fr) * 2001-05-17 2002-11-20 Aida Engineering, Ltd. Presse avec mécanisme de suspension
US20030200879A1 (en) * 2002-04-26 2003-10-30 Komatsu Ltd. Die height adjusting device for pressing machine
US20030217651A1 (en) * 2002-05-22 2003-11-27 Brewer W. Craig Method and apparatus for eliminating free clearances in a press shutheight adjustment mechanism
EP1582337A1 (fr) * 2004-03-30 2005-10-05 Haulick + Roos GmbH Presse, presse de poinçonnage ou dispositif de formage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7616690B2 (en) 2000-10-31 2009-11-10 Imec Method and apparatus for adaptive encoding framed data sequences
EP2119557A3 (fr) * 2008-05-12 2010-10-27 Aida Engineering, Ltd. Presse incluant une section de contrôle de correction de la position de point mort bas
US8100052B2 (en) 2008-05-12 2012-01-24 Aida Engineering, Ltd. Press machine including bottom dead center position correction control section
DE102012014941B4 (de) * 2011-07-27 2019-08-08 Kabushiki Kaisha Yamada Dobby Presse

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