EP1310308B1 - Machine à poinçonner - Google Patents

Machine à poinçonner Download PDF

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Publication number
EP1310308B1
EP1310308B1 EP02024491A EP02024491A EP1310308B1 EP 1310308 B1 EP1310308 B1 EP 1310308B1 EP 02024491 A EP02024491 A EP 02024491A EP 02024491 A EP02024491 A EP 02024491A EP 1310308 B1 EP1310308 B1 EP 1310308B1
Authority
EP
European Patent Office
Prior art keywords
punching machine
slide member
graduated
locking
bar
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 - Lifetime
Application number
EP02024491A
Other languages
German (de)
English (en)
Other versions
EP1310308A2 (fr
EP1310308A3 (fr
Inventor
Giorgio Ostini
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.)
Euromac SpA
Original Assignee
Euromac SpA
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 Euromac SpA filed Critical Euromac SpA
Publication of EP1310308A2 publication Critical patent/EP1310308A2/fr
Publication of EP1310308A3 publication Critical patent/EP1310308A3/fr
Application granted granted Critical
Publication of EP1310308B1 publication Critical patent/EP1310308B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/11—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/04—Centering the work; Positioning the tools

Definitions

  • the present invention relates to a punching machine provided with an automatic pincer positioning device (see for example DE-A-4237825 ).
  • Punching machines for metal plates or sheets are equipped with pincers to hold and to move the plates that are being worked on the work bench surface.
  • Such pincers are mounted on a graduated horizontal reference bar in such a way that their position is established according to the size of each plate and the automatic work program that is set for it, as well in such a way that the punch head that carries the machine tools does not interfere with them during the punching operations.
  • the graduated bar can move in two dimensions on the punching machine's working plane to present the plates, held still by the aforementioned pincers, to the machine tools brought by the punch head so that this can carry out the task as programmed and set by the logic that governs and controls each punching machine.
  • pincers that lock the plates in place are carried out strictly manually: such pincers are in fact slidably mounted along the graduated bar and when they have reached their pre-established position they are rendered rigid with the bar itself by means of clamps that can be locked or released with nuts and bolts provided for the purpose.
  • the manual positioning of the pincers may be subject to registration inaccuracies in relation to the predetermined graduated references for the work program, inaccuracies that essentially depend on the skill and care of the human operator and that, though of themselves slight in absolute terms, may lead to imprecise performance of the work that becomes exponentially extended until the punching machine becomes completely jammed when one of the pincers, in its cross movement, collides with the headstock.
  • the technical aim of this invention is to eliminate the above-mentioned problems of the state of the art by providing a punching machine having a device for the automatic positioning of the workpiece-locking pincers whereby the said positioning can be carried out with no need for any manual intervention and with the maximum precision in its execution.
  • a punching machine having a punching machine framework, a work plane, a handling assembly carried by said framework, a graduated workpiece checking bar and a pair of workpiece-locking pincers brought by said handling assembly, said graduated bar being mobile in, and flush with a work plane, at least one pair of clamping units for each pincers, and a programme control unit, characterised in that it comprises a device for automatic positioning each of the workpiece-locking pincers, including a slide member for each pincer slidably mounted on the said graduated bar, locking and retaining means carried by said slide member and locking means arranged to lock and unlock said slide member relatively to said graduated bar.
  • 1 generally indicates a device for the automatic positioning of plate-locking pincers 2 on a work plane 4 of a punching machine 5.
  • the device 1 comprises a graduated workpiece checking bar 6 brought by a handling or conveying assembly (not shown as it is well-known to a person skilled in the art and its structure is outside the scope of the present invention) that is supported by the framework 7 of the machine 5 and mobile along two dimensions parallel to, and flush with, the work plane 4.
  • a handling or conveying assembly not shown as it is well-known to a person skilled in the art and its structure is outside the scope of the present invention
  • a slide or saddle 9 is slidably mounted and guided onto the graduated bar 6 and has one or a pair of bracket extensions 9a. At its lower portion the slide 9 carries one or a pair of lower support arms 8 projecting from it, e.g. in substantial parallelism with the brackets 9a.
  • the slide 9 is formed with rear dovetail grooves 15 at its rear face 14 arranged to engage with respective longitudinal grooves 6a in the graduated bar in order to form a sliding joint therewith.
  • a first locking mechanism is provided for to lock and hold, upon control, the slide 9 tight to the graduated bar 6 or to let it free to slide along it.
  • the locking mechanism 10 can be automatically actuated by a pair of upper and lower clamping cylinder-and-piston units 11, e.g. of a well known type normally provided on punching machines 5, designed to lock a plate 3 on the work plane 4.
  • Each plate-locking pincer 2 has its own actuator 12, e.g. a fluid operated jack, arranged to actuate a locking and retaining mechanism 13 for tightening hold of the plate 3 when this latter is in position for punching, i.e. when the pincers 2 are positioned, according to the program, along the graduated bar 6.
  • actuator 12 e.g. a fluid operated jack
  • the first locking mechanism 10 consists of at least a first lever member or spike 16 that is articulated at a pivot pin 17 to an upper portion of the slide 9 and has its rear end facing the graduated bar 6 terminating with a downwardly extending pawl o tooth 18 arranged to engage with the upper groove 15 of the graduated bar 6 through an opening or recess in the slide 9, whereas its front end is spring loaded at its lower face 19 by a resilient means, e.g. a pre-tensioned helical spring 20 mounted onto a support pin 21 that is borne by the support arms 8.
  • the upper face 22 is designed to be engaged at the rear end of the spike 16 by the upper clamping cylinder-and-piston unit 11.
  • the support pin 21 has fine registration means, arranged to adjust the reaction force of the pre-tensioned spring 20, e.g. comprising a hexagonal head 23 coaxial to, and formed at the lower end of the support pin, a threaded rod 24 which is an extension of the support pin 21 integral with the hexagonal head 23 and designed to penetrate a counter-threaded hole (not visible in the drawings) that is formed coaxially to the support pin 21 in a traverse member 26 rigidly connected, e.g. welded, at its ends to the brackets 9a.
  • a washer 25 rests upon the hexagonal head 23 around the support pin 21 and acts as abutment member for the pre-tensioned spring 20 whose other end rest against the lower face 19 of the of spike 16.
  • the second locking mechanism 13 consists of at least one rocking lever 27 that is pivoted at an intermediate portion thereof to a pivot pin 28 secured to the support arms 8, and has its rear end 27a shaped as a fork for slidably and rotatably engaging with a pivot pin 29 secured to one and of the actuator 12, e.g. a jack, whose other end is carried by the slide 9.
  • the front end 27b of the rocking lever 27 locates a roller pad 31 of plastics material having a longitudinal flattened portion 31a facing the work plane 4 and designed to rest on and engage with a metal sheet or plate 3 to be locked in position on the work plane 4, as is known in the art.
  • the operation of a device for the automatic positioning of plate-locking pincers in punching machines, according to the present invention, is described here below with specific reference to one only of the pincers 2 provided in the punching machine 5.
  • the helical spring 20 keeps the spike 16 normally engaged at its pawl 18 with the upper groove dove-tailed profile groove 6a of the graduated bar 6, thereby keeping the pincer 2 constantly in its closed position for carrying out a punching operation.
  • the rocking lever 27 retains a metal sheet or plate 3 ( Figure 2) by being pulled upwards at its end 27a owing to the action of the actuator 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Punching Or Piercing (AREA)

Claims (8)

  1. Poinçonneuse ayant un bâti (7) de poinçonneuse, un plan de travail (4) pour des pièces (3) de fabrication, un ensemble de manutention porté par ledit bâti (7), une barre graduée (6) de vérification des pièces de fabrication, et une paire de pinces (2) de blocage des pièces de fabrication amenées par ledit ensemble de manutention, ladite barre graduée (6) étant mobile dans un plan de travail (4) et de niveau avec celui-ci, au moins une paire d'unités de serrage (11) pour chaque pince (2) et une unité (30) de commande de programme.
    caractérisée en ce qu' elle comprend un dispositif (1) pour positionner automatiquement chacune des pinces (2) de blocage des pièces de fabrication, comprenant un élément de glissière (9) pour chaque pince (2) monté de manière coulissante sur ladite barre graduée (6), des moyens de blocage et de retenue (13) portés par ledit élément de glissière (9) et des moyens de blocage (10) agencés pour verrouiller et déverrouiller ledit élément de glissière (9) par rapport à ladite barre graduée (6).
  2. Poinçonneuse selon la revendication 1, caractérisée en ce que lesdits moyens de blocage et de retenue (13) comprennent au moins un élément de levier (16) qui est articulé par un pivot (17) avec ledit élément de glissière (9) et qui a une de ses extrémités faisant face à ladite barre graduée (6) et agencée pour s'engager avec celle-ci, et l'autre extrémité agencée pour être actionnée par une unité de serrage correspondante (11), et des moyens élastiques (20) conçus pour forcer ladite autre extrémité dudit élément de levier (16) en engagement avec ladite barre graduée (6).
  3. Poinçonneuse selon la revendication 2, caractérisée en ce que ladite extrémité dudit élément de levier (16) faisant face à ladite barre graduée (6) est terminée par au moins un prolongement formant cliquet (18) prévu pour s'encliqueter avec ladite barre graduée (6).
  4. Poinçonneuse selon la revendication 3, caractérisée en ce que ledit élément de glissière (9) possède un évidement ou une ouverture d'accès à ladite barre graduée (6) par laquelle le ou chaque prolongement formant cliquet (18) vient s'encliqueter avec ladite barre graduée (6).
  5. Poinçonneuse selon l'une quelconque des revendications 2 à 4, caractérisée en ce que lesdits moyens élastiques comprennent un ressort pré-armé (20) sur des moyens de support (21, 25) portés par ledit élément de glissière (9).
  6. Poinçonneuse selon la revendication 5, caractérisée en ce que lesdits moyens de support (21) comprennent des moyens de repérage (23) prévus pour ajuster la force réactionnelle du ressort pré-armé (20).
  7. Poinçonneuse selon la revendication 5, caractérisée en ce que lesdits moyens de repérage comprennent une tige filetée (24) ayant une tête de commande (23) et conçue pour pénétrer dans un trou fileté formé coaxialement à ladite tige filetée (24) dans un élément transversal (26) porté par ledit élément de glissière (9).
  8. Poinçonneuse selon l'une quelconque des revendications 1 à 7, caractérisée en ce que lesdits moyens de retenue (13) comprennent des moyens d'actionnement (12) ayant une extrémité fixée audit élément de glissière (9), au moins un bras de support (8) porté par, et s'étendant depuis, ledit élément de glissière (9), un élément de culbuteur (27) monté pivotant au niveau d'une portion intermédiaire sur lesdits bras de support (8) et ayant une extrémité (27a) conformée de manière à s'engager de manière coulissante et rotative avec un pivot (29) fixé à l'autre extrémité desdits moyens d'actionnement (12), alors que son autre extrémité (27b) abrite un élément de patin (31) faisant face au plan de travail (4) et conçu pour reposer sur, et s'engager avec, une pièce de fabrication (3) à bloquer en position sur le plan de travail (4).
EP02024491A 2001-11-09 2002-10-30 Machine à poinçonner Expired - Lifetime EP1310308B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0127039 2001-11-09
GB0127039A GB2381770B (en) 2001-11-09 2001-11-09 Punching machine

Publications (3)

Publication Number Publication Date
EP1310308A2 EP1310308A2 (fr) 2003-05-14
EP1310308A3 EP1310308A3 (fr) 2004-09-22
EP1310308B1 true EP1310308B1 (fr) 2007-12-12

Family

ID=9925547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02024491A Expired - Lifetime EP1310308B1 (fr) 2001-11-09 2002-10-30 Machine à poinçonner

Country Status (6)

Country Link
EP (1) EP1310308B1 (fr)
CN (1) CN1287961C (fr)
AT (1) ATE380610T1 (fr)
DE (1) DE60223987T2 (fr)
GB (1) GB2381770B (fr)
TR (1) TR200202469A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101982268B (zh) * 2010-09-30 2012-04-11 芦台经济开发区金方通焊接设备有限公司 左右旋转式打孔机
CN102114647B (zh) * 2010-12-23 2012-09-05 天津市天一科技有限公司 汽车内饰件保险杠雷达及牌照孔手动冲切专机
CN103707356B (zh) * 2013-12-20 2015-08-19 沈阳橡胶研究设计院有限公司 一种大型橡胶制品均距定数打孔方法
CN104325691A (zh) * 2014-10-28 2015-02-04 江阴市汇通包装机械有限公司 打孔机机架
CN112916696B (zh) * 2021-01-05 2024-04-02 李翠兰 一种cpu散热器用扣具自动成型装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213733A (en) * 1976-09-07 1980-07-22 Houdaille Industries, Inc. Automatic side gauge for machine tool workpiece control and method
US4690021A (en) * 1977-07-15 1987-09-01 Strippit/Di-Acro-Houdaille, Inc. Automatic load unload turret punch
IT1123708B (it) * 1979-09-12 1986-04-30 Salvagnini Transferica Spa Macchina punzonatrice automatica
JPS6020094B2 (ja) * 1979-12-18 1985-05-20 株式会社 アマダ ワ−ククランプ装置
GB2069889B (en) * 1980-02-22 1983-03-23 Mercer Nairne & Co Ltd Machine tool control
GB2077173A (en) * 1980-03-11 1981-12-16 Producto Machine Tools Europ L Improvements in and relating to punching machines
US4382395A (en) * 1981-04-02 1983-05-10 Thomas Haar Loading device for a machine tool, particularly for machining panels of sheet metal or other materials
DE4237825A1 (de) * 1992-11-10 1994-05-11 Hans Berger Mestechnik Gmbh Presse oder Stanze für flächiges Material
JP3658898B2 (ja) * 1996-11-29 2005-06-08 村田機械株式会社 プレス機械のワーク持替装置
GB2355951A (en) * 1999-11-05 2001-05-09 Elliott Ind Ltd Machine press tools

Also Published As

Publication number Publication date
TR200202469A2 (tr) 2003-06-23
GB0127039D0 (en) 2002-01-02
DE60223987D1 (de) 2008-01-24
CN1287961C (zh) 2006-12-06
EP1310308A2 (fr) 2003-05-14
CN1417010A (zh) 2003-05-14
GB2381770A (en) 2003-05-14
GB2381770B (en) 2004-12-15
ATE380610T1 (de) 2007-12-15
EP1310308A3 (fr) 2004-09-22
DE60223987T2 (de) 2008-12-04

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