EP2014385A2 - Ensemble de boîte pour poinçonneuse - Google Patents

Ensemble de boîte pour poinçonneuse Download PDF

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Publication number
EP2014385A2
EP2014385A2 EP08156771A EP08156771A EP2014385A2 EP 2014385 A2 EP2014385 A2 EP 2014385A2 EP 08156771 A EP08156771 A EP 08156771A EP 08156771 A EP08156771 A EP 08156771A EP 2014385 A2 EP2014385 A2 EP 2014385A2
Authority
EP
European Patent Office
Prior art keywords
die
box
holder
holder box
cam
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Withdrawn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
EP08156771A
Other languages
German (de)
English (en)
Other versions
EP2014385A3 (fr
Inventor
Stefano Raimondi
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.)
Rainer SRL
Original Assignee
Rainer SRL
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 Rainer SRL filed Critical Rainer SRL
Publication of EP2014385A2 publication Critical patent/EP2014385A2/fr
Publication of EP2014385A3 publication Critical patent/EP2014385A3/fr
Withdrawn legal-status Critical Current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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/04—Movable or exchangeable mountings for tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/028—Loading or unloading of dies, platens or press rams

Definitions

  • the present invention relates to a box assembly for a punch press.
  • the present invention is advantageously, but not exclusively, applied in a plate drawing machine, to which explicit reference will be made in the following description without therefore loosing in generality.
  • Punch presses provided with box assemblies in which the indexing die-holder boxes can be lifted to perform various type of metal sheet machining, specifically drawing, are known.
  • a machine of this type is equipped with complex hydraulic or electric actuators arranged in the lower part of the machine itself.
  • the same device for indexed rotation of the die-holder box is used, instead of employing complex electric or hydraulic apparatuses for lifting/lowering the die-holder box (with the corresponding interchangeable die).
  • numeral 10 indicates, as a whole, an indexing box assembly which is the object of the present invention.
  • the indexed box assembly 10 includes a container 11 provided with four ears 12, each of which includes a corresponding through hole 12a crossed, in use, by a corresponding fastening bolt 13 of the entire indexing box assembly 10 to a base (not shown) of a punch press (not shown), specifically of a drawing machine.
  • the container 11 includes a window (14) ( figure 4 ) for purposes which will be better specified below.
  • the indexed box assembly 10 further includes an indexing die-holder box 15 adapted to receive a general die 16 (a tool which is changed by the operator according to the type of machining to be performed) and a device 17 ( figures 3 , 4 ) for lifting/lowering the indexing die-holder box 15 and thus the general die 16 associated thereto.
  • a general die 16 a tool which is changed by the operator according to the type of machining to be performed
  • a device 17 figures 3 , 4
  • the device 17 includes, in turn, a cam-holder bushing 18 to which a lower cam 19 is integrally fixed by means of a plurality of pins 20 ( figure 4 ) inserted into the corresponding holes 21.
  • the lower cam 19 includes three cam sectors 19a.
  • the cam-holder bushing 18 rests on a lower closing thrust block 22, in turn fixed to the container 11 by means of a plurality of screws 23.
  • a plurality of metal balls (not shown) contained in a track 24 ( figure 3 ) are provided to facilitate the sliding between the lowering closing thrust block 22 and the cam-holder bushing 18.
  • a rolling bearing to allow, when required, an optimal rotation between these two elements about an essential symmetry axis (a) of the entire indexing box assembly 10 is provided between the lower closing thrust block 22 and the cam-holder bushing 18.
  • the upper cam 25 is integral with the indexing die-holder box 15, rests on the lower cam 19 and is fixed to the cam-holder bushing 18.
  • the die 16 is integral with the indexing die-holder box 15 while resting on an upper spacing element 26 ( figures 4-8 ).
  • a track 28 containing a plurality of metal balls (not shown) so as to form a bearing adapted to facilitate the rotation of the indexing die-holder box 15 about the aforesaid axis (a) is also made between the upper thrust block 27 and the indexing die-holder box 15.
  • a cylindrical liner 30 is provided, which is fixed by known means (not shown) to the internal surface of the indexing die-holder box 15 ( figures 1 , 4 ).
  • the indexing die-holder box 15 is provided, on its lower portion, with a toothed wheel 31 (integrally obtained with the indexing die-holder box 15 itself), which in use meshes with a toothed pinion (not shown) which belongs to a device for the indexed rotation of the indexing die-holder box 15 about the axis (a).
  • the toothed pinion is integral with the base of the punch press, while the toothed wheel 31 is integral with the indexing die-holder box 15 (which is lifted and lowered in use), a creep is generated between the teeth of the toothed pinion and those of the toothed wheel 31.
  • teeth of the toothed pinion are considerably shorter than the teeth of the toothed wheel 31.
  • the window 14 on the casing 11 is higher than the teeth of the toothed wheel 31 itself.
  • a series of springs 32 is used in order to allow an easy return of the indexing die-holder box 15 to its lowest position, i.e. to bottom dead centre.
  • Each spring 32 is pressed between a shoulder 33 specifically provided inside the casing 11 and the head 43a of a corresponding screw 34, the free end 34b of which is screwed into a seat 35 provided on the upper thrust block 27.
  • the spring 32 is compressed between the head 34a of the screw 34 and the shoulder 33 when by effect of its rotation about the axis (a) the indexing die-holder box 15 rises, bringing the die 16 and the upper thrust block 27 along.
  • a certain elastic energy will thus be stored and will be returned to the system when, by effect of the indexed rotation device, the indexing die-holder box 15 will start to lower.
  • Such an elastic energy will be used to overcome the creeping friction which is generated between the teeth of the toothed wheel 31 and the teeth of the drive pinion, friction which will create a stall torque in the step of returning to the bottom dead centre.
  • a first key device KY1 adapted to insert/release the indexing die-holder box 15, and a second key device KY2, employed for inserting/releasing the cam-holder bushing 18, are provided.
  • the key devices KY1, KY2 are actuated by pneumatic means (not shown) to perform a program which will be described hereinafter.
  • first cam 19 is integral with the cam-holder bushing 18, and the second cam 25 is integral with the indexing die-holder box 15.
  • the indexing cam-holder box 15 receives a torque by means of gears from an indexed rotation device (not shown).
  • the second cam 25 creeps on the first cam 19 (blocked) and reacts on the latter, which is practically a reaction cam.
  • the indexing die-holder box 15 is taken to the working position (i.e. to the top dead centre).
  • the indexing die-holder box 15 can be used in this arrival configuration for machining (thus the indexing die-holder box 15 is used as fixed station), or it may be indexed and thus used in different angular positions.
  • the cam 19 is made integral with the cam 25 and thus also the cam-holder bushing 18 may rotate by exploiting the same torque which is given to the indexing die-holder box 15 by the indexed rotation device (not shown).
  • the rotating elements consisting of the indexing die-holder box 15 and the cam-holder bushing 18 are blocked in the reference positions by means of mentioned key devices KY1, KY2 actuated and released by a pneumatically controlled lever system. It is worth noting that when the indexing die-holder box 15 is lifted, the cam 19 must react and thus the key device KY2 is inserted and blocks the cam-holder bushing 18, and thus also blocks the cam 19.
  • the key devices KY1, KY2 may be manually actuated by an operator or, in accordance with the device for the indexed rotation of the die-holder box 15, may perform proper cycles controlled by an electronic control unit (not shown), which performs methods for lifting, rotating and lowering the die-holder box 15 (see below).
  • STEP 1 (Home position: i.e. indexing die-holder box in its bottom dead centre position)
  • the indexed rotation device (not shown), by means of known means (not shown), meshes with the indexing die-holder box 15 using the toothed wheel 31, and then it immediately releases the key device KY1; the indexing die-holder box 15 is rotated by approximately 54° anticlockwise; however, the key device KY2 is kept inserted.
  • the indexed rotation device (not shown) rotates the indexing die-holder box 15 (to its top dead centre) by an angle ⁇ required by the machining to place the indexing box 16 in the desired position.
  • STEP 6 (Fixing the system when the indexing die-holder box has reached its bottom dead centre position)
  • the key devices KY1, KY2 may be actuated by means of pneumatic means.
  • the key devices KY1, KY2 may be actuated either manually or by means of a program controlled by an electronic control unit (not shown).

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)
EP08156771A 2007-05-23 2008-05-22 Ensemble de boîte pour poinçonneuse Withdrawn EP2014385A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITBO20070370 ITBO20070370A1 (it) 2007-05-23 2007-05-23 Gruppo cassetto per macchina punzonatrice

Publications (2)

Publication Number Publication Date
EP2014385A2 true EP2014385A2 (fr) 2009-01-14
EP2014385A3 EP2014385A3 (fr) 2009-04-08

Family

ID=39739575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156771A Withdrawn EP2014385A3 (fr) 2007-05-23 2008-05-22 Ensemble de boîte pour poinçonneuse

Country Status (2)

Country Link
EP (1) EP2014385A3 (fr)
IT (1) ITBO20070370A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020129434A1 (de) 2020-11-09 2022-05-12 Kay D. Kühnel Stempelpresse mit verkürztem Auslaufweg
EP4487976A1 (fr) * 2023-07-05 2025-01-08 WS Wieländer + Schill Professionelle Karosserie- Spezialwerkzeuge GmbH & Co. KG Matrice de poinçonnage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62151229A (ja) * 1985-12-25 1987-07-06 Anritsu Corp パンチプレス機
JPH07108425B2 (ja) * 1990-03-23 1995-11-22 株式会社小松製作所 パンチプレス
US5429573A (en) * 1993-10-12 1995-07-04 Economy Machine & Tool Company Die lift tool for rotary punch machine
US5915515A (en) * 1996-08-05 1999-06-29 Blair; Rodney L. Die lifting mechanism
JP2000094065A (ja) * 1998-09-22 2000-04-04 Amada Co Ltd ダイ着脱方法及びダイ着脱装置
US20060107727A1 (en) * 2004-11-23 2006-05-25 Pelech Bruno J Die lifter device for a press brake

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020129434A1 (de) 2020-11-09 2022-05-12 Kay D. Kühnel Stempelpresse mit verkürztem Auslaufweg
EP4487976A1 (fr) * 2023-07-05 2025-01-08 WS Wieländer + Schill Professionelle Karosserie- Spezialwerkzeuge GmbH & Co. KG Matrice de poinçonnage

Also Published As

Publication number Publication date
ITBO20070370A1 (it) 2008-11-24
EP2014385A3 (fr) 2009-04-08

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