EP1349723A2 - Procede et appareil permettant de determiner et d'etablir la synchronisation d'un mecanisme de liberation de materiau d'un mecanisme d'injection de materiau - Google Patents

Procede et appareil permettant de determiner et d'etablir la synchronisation d'un mecanisme de liberation de materiau d'un mecanisme d'injection de materiau

Info

Publication number
EP1349723A2
EP1349723A2 EP01988165A EP01988165A EP1349723A2 EP 1349723 A2 EP1349723 A2 EP 1349723A2 EP 01988165 A EP01988165 A EP 01988165A EP 01988165 A EP01988165 A EP 01988165A EP 1349723 A2 EP1349723 A2 EP 1349723A2
Authority
EP
European Patent Office
Prior art keywords
release mechanism
press
feed
timing
positioning pin
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
EP01988165A
Other languages
German (de)
English (en)
Other versions
EP1349723A4 (fr
EP1349723B1 (fr
Inventor
Vaughn Martin
Daniel G. Lukas
Bryan P. Gentile
Matthew C. Crowell
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.)
Nidec Vamco Corp
Original Assignee
Vamco International Inc
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 Vamco International Inc filed Critical Vamco International Inc
Publication of EP1349723A2 publication Critical patent/EP1349723A2/fr
Publication of EP1349723A4 publication Critical patent/EP1349723A4/fr
Application granted granted Critical
Publication of EP1349723B1 publication Critical patent/EP1349723B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
    • B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/06—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by positive or negative engaging parts co-operating with corresponding parts of the sheet or the like to be processed, e.g. carrier bolts or grooved section in the carriers

Definitions

  • the present invention relates generally to stamping systems having material feed mechanisms and, in particular, to a method and apparatus for determining and setting a material release mechanism timing for a material feed mechanism.
  • parts made with an automated stamping press utilize a progressive die set.
  • the progressive die set uses multiple stations, each station typically containing at least one piercing or forming punch and a mating die or dies.
  • Continuous strip material, from which the part will be made is incrementally fed through the die set, progressing from station to station with an automated feeding device.
  • a material feed mechamsm intermittently moves the strip material a distance, corresponding to the distance between each die station, while the die set is open. This mechanism then stops the material at each station when the die set closes. Examples of prior art material feed mechanisms may be found in U.S. Patent Nos. 5,755,370; 5,868,296; 5,915,293; and 5,808,465.
  • Alignment devices are commonly used in a progressive die set to position the strip in the die set for each subsequent operation more accurately than is possible with the material feed mechanism.
  • the most commonly used and most easily understood alignment device is a tapered or beveled point pilot positioning pin or a plurality of such pins.
  • the pilot positioning pin is mounted in the moving, usually the upper, die shoe.
  • a hole of slightly larger diameter than the diameter of the pilot positioning pin is pierced in the continuous strip material in a first station during the first closure of the die.
  • the automated material feed mechanism then moves the material a predetermined distance corresponding to the distance between subsequent die stations.
  • the pilot positioning pin which is longer in length than the working punches, enters the hole created by the punch and locates the material accurately.
  • Pilot positioning pins may be used at any number of subsequent die stations.- In order for the pilot positioning pin, or other alignment device, to effectively position the material accurately, the material feed mechanism must relinquish its grip on the strip material. The timing of the release function of the material feed mechanism is critical, as premature release may allow the material to move out of position too far for the pilot positioning pin to be effective. Alternatively, if the material feed mechanism releases the strip material too late or not at all, tension will be developed in the strip material when the pilot positioning pin enters the hole. This may cause hole deformation with resulting improperly positioned material. This improperly positioned material will cause the manufacture of malformed parts and can damage the pilot positioning pin as well as the die set.
  • the point at which the material alignment device begins contact with the material is determined visually or, alternatively, by grasping the material in hand, moving or trying to move the material, and feeling for resistance to movement of the material provided by the alignment device. Having determined the press position where the material alignment device begins to contact the material, the operator then adjusts the material feed mechanism to release the hold on the material at this point or slightly before this point in the press stroke. This process is then repeated and adjustments are made until proper timing of the material release mechanism is verified.
  • an object of the present invention to provide a method for determining the correct timing of the material release mechanism. It is another object of the present invention to provide a method for setting the correct timing of the material release mechanism. It is a further object of the present invention to provide an automated system for accurately determining release mechanism timing. It is a still further object of the present invention to provide a method and apparatus that is capable of disengaging contact with a material immediately prior to engagement by an alignment device.
  • the present invention includes a method for determining the correct timing of a material release mechanism of a material feed mechanism, including the steps of: (1) cycling a press mechanism through a working portion of a tooling mechanism; (2) monitoring the press mechanism position; (3) determining, by a location device, the desired timing for the material release mechanism to release contact with the material; and (4) correlating the desired material release mechanism timing to the press mechanism position.
  • the method also includes the step of adjusting the timing of the material release mechanism to the determined desired material release mechanism timing.
  • the present invention is also directed to a stamping system for working a material.
  • This stamping system includes a press mechanism configured to punch holes in the material.
  • the stamping system also includes a material feed mechanism having a material release mechanism for feeding material to the punching mechanism, and a location device for monitoring the press mechanism position in determining a desired material release mechanism timing.
  • Fig. 1 is a side schematic view of a stamping system according to the present invention.
  • FIG. 2 is a front view of a material feed mechanism of the stamping system in Fig. 1 ;
  • FIG. 3 is an edge view of the material feed mechanism in Fig. 2;
  • FIG. 4 is a side schematic view of a tooling mechanism according to the present invention.
  • FIG. 5 is a flow diagram of a method according to the present invention.
  • Fig. 6 is a graph of press mechanism position versus material position.
  • the present invention is directed to a stamping system 10, which includes a press mechanism 12, a material feed mechanism 14 and a material dispenser 16.
  • the material feed mechanism 14 is used to feed an elongated strip of material 18 from the material dispenser 16 through the material feed mechanism 14 and into the press mechanism 12.
  • This press mechanism 12 typically includes a tooling mechanism 17 having an upper die shoe 20 and lower die shoe 22.
  • the upper die shoe 20 is mounted to a press slide 24 in the press mechanism 12.
  • the upper die shoe 20 of the tooling mechanism 17 has a punching device 26 and an alignment device 28 mounted on its underside.
  • the punching device 26 is constructed so that it is capable of piercing or punching the material 18.
  • the alignment device 28 is a pilot positioning pin 30.
  • this upper die shoe 20 is mounted to the press slide 24 which, in turn, moves up and down in relation to the lower die shoe 22.
  • the lower die shoe 22 of the tooling mechanism 17 is mounted to a bolster plate 32 rigidly mounted to a fixed press bed 34.
  • the press mechanism 12 also includes a driver having a crankshaft 36 to drive or move the press slide 24 towards and away from the lower die shoe 22, as represented by arrow A.
  • the material feed mechanism 14 includes a feed drive roll motor 38, typically a servo motor, to power and drive the feed drive roll 40, which advances the material 18 through the material feed mechanism 14.
  • a material release mechanism 42 includes a material gripping mechanism 44, which works along with the feed drive roll 40 to grip the material 18. Typically, this material gripping mechanism 44 is a secondary drive roll.
  • the material gripping mechanism 44 is mounted in a pivot frame 46, which is pivotably mounted to a material feed mechanism frame 48.
  • the material release mechanism 42 also includes an actuator 50, typically pneumatic, capable of applying downward pressure on the pivot frame 46, thereby allowing the material gripping mechanism 44 to grip the material 18 between the material gripping mechanism 44 and the feed drive roll 40.
  • the material feed mechanism 14 includes a motor 52 to drive a release screw 54, which mates with a nut 56, for effecting the movement of the pivot frame 46 against the force of actuator 50. It is this release screw 54 and nut 56 arrangement which allows the material gripping mechanism 44 to move away from the feed drive roll 40, thereby releasing the grip pressure on the strip material 18.
  • the stamping system 10 also includes a location device 58.
  • this location device 58 includes a controller 60 that monitors the press mechanism 12 position and determines the desired timing for the material release mechanism 42 to release contact with the material 18. Further, this controller 60 can perform the correlation between the desired material- release mechanism 42 timing to the press mechanism 12 position. It is also envisioned that the location device 58 include a first feedback device 62 to monitor, collect and transmit information regarding the press mechanism 12, as well as its parts, to the controller 60. Similarly, a second feedback device 64 may be used to monitor, collect and transmit information regarding the material feed mechanism 14, and its parts, to the controller
  • the location device 58 uses the first feedback device 62 to monitor the crankshaft 36 of the press mechanism 12. Next, this first feedback device 62 communicates the angular position information of the crankshaft 36 to the controller 60.
  • the second feedback device 64 is mounted to the feed drive roll motor 38 and is used to monitor and communicate the angular position of the feed drive roll motor 38 to the controller 60.
  • the controller 60 computes position error information based on the required motion of the feed drive roll motor 38, and the measured actual motor angular position. Controller 60 may also compute the required torque command for the feed drive roll motor 38, based on the position error information computed above. This torque command is sent to the motor 38. Also, the required torque commands, by definition, may be used and/or referred to as the measured torque of the motor 38.
  • this location device 58 has been described as monitoring the specific equipment discussed above, it is envisioned and discussed in greater detail hereinafter, that this location device 58 may be used to monitor and determine the desired material release mechanism 14 timing and press mechanism 12 position based upon any of the physical characteristics of the stamping system 10 parts and equipment, including the feed mechanism and the press itself.
  • the present invention also includes a method for determining the correct timing of the material release mechanism 14.
  • the press mechanism 12 is cycled through the working portion of the alignment device 28 of the tooling mechanism 17.
  • the press mechamsm 12 position is monitored.
  • the above-described location device 58 may be used to determine the desired timing for the material release mechanism 42 to release contact with the material 18.
  • the desired timing for release is immediately prior to contact with the material 18 by the alignment device 28, or in this embodiment, the pilot positioning pin 30.
  • the determined desired material release mechanism 14 timing is correlated to the press mechanism 12 position.
  • the material release mechanism 42 will allow the material release mechanism 42 to disengage the material 18, allow the pilot positioning pin 30 to contact the material 18 and align it, before the material gripping mechanism 44 again contacts the material 18 and the material feed mechanism 14 continues the feed.
  • the actual material release mechanism 42 timing may be adjusted to the determined desired material release mechanism 42 timing.
  • the strip material 18 is positioned with the leading edge through the first die station, containing the punching device 26.
  • the press mechanism 12 is then cycled through one complete press stroke, with the punching device 26 piercing or punching a hole 66 into the strip material 18.
  • the material 18 is then advanced by the material feed mechanism 14 a predetermined distance, short of the die progression. This will position the material 18, such that the pilot positioning pin 30 is located substantially above the previously punched hole 66, but slightly misaligned. This condition is illustrated in Fig. 4, with the misalignment greatly exaggerated. In practice, this misalignment is small, typically only .003 inches to .008 inches.
  • the next step is to cycle the press mechanism 12 through the working portion of the alignment device 28, and typically through another complete press stroke, while the controller 60 simultaneously monitors the position of the feed drive roll motor 38.
  • the controller 60 analyzes the information gathered and correlates the movement of the material release mechanism 42 (including the material gripping mechanism 44) and the feed drive roll motor 38 to the position of the press mechamsm 12, thereby determining the press mechanism 12 position where the pilot positioning pin 30 entered the strip 18.
  • the material feed mechanism 14, specifically the material release mechanism 42, is programmed to release the material 18 at the calculated press mechanism 12 position for subsequent press cycles.
  • the controller 60 automatically sets the correct release point and stores the information for future use.
  • the pilot positiomng pin 30 has a guide end 68, which is typically beveled.
  • the guide end 68 of the pilot positioning pin 30 is partially engaged with the hole 66. Due to the misalignment, a side wall of the guide end 68 contacts an inner edge of the hole 66, such that the material 18 is moved along a first axis (arrow B) as the side wall of the guide end 68 continues through the hole 66.
  • the desired material release mechanism 42 timing is based upon the linear movement of the material 18 along this first axis B. Further, the linear movement of the material 18 along this first axis B after the guide end 68 has fully engaged the hole 66 may be measured. The linear movement of the material 18 may then be correlated to the position of the press mechanism 12, to determine the desired material release mechamsm 42 timing.
  • the angular rotation of the feed drive roll 40 caused by the linear movement of the material 18 may be correlated to the position of the press mechanism 12, to determine the desired material release mechanism 42 timing. If the press mechanism 12 includes a press ram, the linear movement of the press ram position may be measured and correlated to the movement of the material 18, to determine the desired material release mechamsm 42 timing.
  • the disturbance force produced upon contact of the pilot positioning pin 30 with the material 18 may be measured. As above, this measurement may be used to determine the desired material release mechanism 42 timing.
  • the torque exerted upon the feed drive roll 40 after the guide end 68 of the pilot positioning pin 30 has fully engaged the hole 66 may also be measured.
  • the force exerted upon the material gripping mechanism 44 may be measured. These measurements may then be used to determine the desired material release mechanism 42 timing. Material 18 movement at the material dispenser 16 may also be measured and used to determine the desired material release mechanism 42 timing.
  • the torque exerted upon the feed drive roll 40, the force exerted upon the material gripping mechanism 44, as well as the feed drive roll motor 38 position -error may all be used to determine the desired material release mechanism 42 timing. It is envisioned that the controller 60, together with appropriate feedback devices (62, 64) may be used to monitor, transmit, and calculate the desired release mechanism 42 timing based upon any of these measurements.
  • the present invention is a stamping system 10 and method for determining and adjusting the desired timing of a material release mechanism 42.
  • the present invention is an automated system, which eliminates the prior art guesswork previously used by operators to set the material release mechanism 42 timing. This, in turn drastically increases productivity and reduces both operator enor and possible operator safety concerns.
  • the present invention determines the precise press mechanism 12 (typically the press slide 24) position when the alignment device 28 is about to contact the material 18 and the material release should occur. It is this precise point in the press stroke when the material feed mechanism 14 should release its grip on the strip material 18. This precise point, as described in detail above, is determined by the controller 60 based upon the linear or angular movements of certain components and subcomponents of the stamping system 10. However, it is also envisioned that one or more sensors can be used and positioned adjacent or in the vicinity of the punching device 26 or the alignment device 28. Such sensors could sense contact or exact positioning of the alignment device 28 and or the punching device 26, and this information could be used to determine the material release mechanism 42 timing.
  • the contact of either the punching device 26 or the alignment device 28 could be sensed when an electrical circuit is complete, thereby determimng the timing for material 18 release.
  • sensors could be used to directly measure the movement of material 18 to determine the timing of material 18 release.
  • the material 18 could be mechanically dithered (or moved back and forth) as the alignment device 28 is entering the hole 66.
  • the controller 60 could determine the material release mechanism 42 timing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Advancing Webs (AREA)

Abstract

L'invention concerne un procédé permettant de déterminer la correcte synchronisation d'un mécanisme (42) de libération de matériau d'un mécanisme (14) d'injection de matériau, consistant à diviser en phases de travail un mécanisme (12) de presse à l'aide d'une section de travail d'un mécanisme (17) d'outillage; à surveiller la position du mécanisme (12) de presse; à déterminer, à l'aide d'un dispositif (58) de localisation, le moment désiré pour que le mécanisme (42) de libération de matériau libère le matériau (18); et à mettre en corrélation le chronométrage du mécanisme (42) de libération du matériau avec la position du mécanisme (12) de presse. La présente invention concerne également un système (10) d'estampage permettant de travailler le matériau (18). Ce système (10) d'estampage comprend un mécanisme (12) pourvu d'un mécanisme (17) d'outillage configuré pour poinçonner (66) des trous dans le matériau (18). Le système (10) d'estampage comprend également un mécanisme (14) d'injection de matériau destiné à injecter le matériau (18) dans le mécanisme (12) de presse, et ce mécanisme (14) d'injection de matériau comprend un mécanisme (42) de libération de matériau. Enfin, le système (10) d'estampage comprend un dispositif (58) de localisation destiné à surveiller la position du mécanisme (12) de presse et à déterminer la synchronisation désirée du mécanisme (42) de libération de matériau.
EP01988165A 2000-11-16 2001-11-16 Procede et appareil permettant de determiner et d'etablir la synchronisation d'un mecanisme de liberation de materiau d'un mecanisme d'injection de materiau Expired - Lifetime EP1349723B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US24914900P 2000-11-16 2000-11-16
US249149P 2000-11-16
PCT/US2001/043698 WO2002045943A2 (fr) 2000-11-16 2001-11-16 Procede et appareil permettant de determiner et d'etablir la synchronisation d'un mecanisme de liberation de materiau d'un mecanisme d'injection de materiau

Publications (3)

Publication Number Publication Date
EP1349723A2 true EP1349723A2 (fr) 2003-10-08
EP1349723A4 EP1349723A4 (fr) 2007-01-03
EP1349723B1 EP1349723B1 (fr) 2011-01-26

Family

ID=22942243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01988165A Expired - Lifetime EP1349723B1 (fr) 2000-11-16 2001-11-16 Procede et appareil permettant de determiner et d'etablir la synchronisation d'un mecanisme de liberation de materiau d'un mecanisme d'injection de materiau

Country Status (6)

Country Link
EP (1) EP1349723B1 (fr)
JP (1) JP4511789B2 (fr)
CN (1) CN1268531C (fr)
AU (1) AU2002241500A1 (fr)
DE (1) DE60143958D1 (fr)
WO (1) WO2002045943A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100336621C (zh) * 2005-09-23 2007-09-12 北京科技大学 在线冷弯型钢二次冲切模及其冲切方法
JP5946185B2 (ja) * 2013-07-22 2016-07-05 大介 小川 プレス機の帯状ワーク搬送装置及び帯状ワーク搬送方法
CN105437353B (zh) * 2015-03-25 2018-03-16 四川博瑞威尔智能设备有限公司 一种封边同步打孔方法及打孔装置
JP6351664B2 (ja) * 2016-06-24 2018-07-04 アイダエンジニアリング株式会社 プレス機械
CN106541040A (zh) * 2016-10-24 2017-03-29 广东长盈精密技术有限公司 冲压模具自动送料机构以及冲压模具
CN110757524B (zh) * 2019-10-15 2021-07-02 师永杰 一种建筑橡胶带用凸轮式切割机构
WO2021210500A1 (fr) * 2020-04-13 2021-10-21 株式会社三共製作所 Dispositif de commande pour dispositif d'alimentation en plaques

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62275535A (ja) * 1986-05-21 1987-11-30 Sugiyama Denki Seisakusho:Kk リリ−スタイミング自動制御装置
US5033342A (en) * 1989-09-07 1991-07-23 Nordlof Richard D Roll type stock feed apparatus for a punch press
US5150022A (en) * 1991-03-05 1992-09-22 Waddington Electronics, Inc. Press feeder and pilot release using servo control
US5720421A (en) * 1994-02-28 1998-02-24 Vamco Machine & Tool, Inc. Elecronically controlled high speed press feed
US5808465A (en) * 1994-02-28 1998-09-15 Vamco Machine & Tool, Inc. Electronically controlled high speed press feed
JP3423141B2 (ja) * 1996-03-15 2003-07-07 株式会社小松製作所 同期ずれ復帰装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *
See also references of WO0245943A2 *

Also Published As

Publication number Publication date
CN1268531C (zh) 2006-08-09
EP1349723A4 (fr) 2007-01-03
WO2002045943A2 (fr) 2002-06-13
DE60143958D1 (de) 2011-03-10
CN1481330A (zh) 2004-03-10
JP4511789B2 (ja) 2010-07-28
WO2002045943A3 (fr) 2003-04-03
AU2002241500A1 (en) 2002-06-18
JP2004520934A (ja) 2004-07-15
EP1349723B1 (fr) 2011-01-26

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