EP0224792B1 - Werkzeugwechseleinrichtung einer mehrstufigen Umformmaschine - Google Patents

Werkzeugwechseleinrichtung einer mehrstufigen Umformmaschine Download PDF

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Publication number
EP0224792B1
EP0224792B1 EP86115967A EP86115967A EP0224792B1 EP 0224792 B1 EP0224792 B1 EP 0224792B1 EP 86115967 A EP86115967 A EP 86115967A EP 86115967 A EP86115967 A EP 86115967A EP 0224792 B1 EP0224792 B1 EP 0224792B1
Authority
EP
European Patent Office
Prior art keywords
clamping
tool
tools
die
plate
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
Application number
EP86115967A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0224792A1 (de
Inventor
Joseph Broquet
Raymond Schoenenberger
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.)
Hatebur Umformmaschinen AG
Original Assignee
Hatebur Umformmaschinen 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 Hatebur Umformmaschinen AG filed Critical Hatebur Umformmaschinen AG
Priority to AT86115967T priority Critical patent/ATE43260T1/de
Publication of EP0224792A1 publication Critical patent/EP0224792A1/de
Application granted granted Critical
Publication of EP0224792B1 publication Critical patent/EP0224792B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/085—Accessories for handling work or tools handling of tools
    • 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
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/02—Dies or mountings therefor
    • B21J13/03—Die mountings

Definitions

  • the invention relates to a tool change device according to the preamble of patent claim 1.
  • Such devices should above all enable the stamping and die tools to be replaced as quickly as possible in the tool room of a forming machine, so that the corresponding changeover times, which require machine downtime, can be kept as short as possible.
  • a further disadvantage with known tool changing devices and in particular also with the tool described in the above-mentioned documents is that the stamping and die tools are guided in the tool holders without tension.
  • increased wear of these tool guides and setting of the tool parts occurs relatively frequently during operation, which results in increasing play between the tool holder and the machine body, which cannot be compensated for during operation.
  • a resulting loosening of the tension of the corresponding tool holder: with the press slide or the machine body can often only be recognized when the interacting tools have already been damaged or even destroyed.
  • the object of the invention is to provide a tool changing device in which the tools for a rapid automatic or semi-automatic change can be prepared outside the tool space of the .forming machine in a manner that can be expected of low-wear operation, and which can be prepared in a very short time
  • the use of a central control allows both the stamp and the die tools to be exchanged without any problems and with reliable tool adjustment.
  • stamping and die tools in the manner of changing magazines in tool blocks, these can be made ready for use outside the machine, so that the downtime of the machine required for the tool change alone takes the duration of the tool block exchange.
  • the clamping elements are located in the corresponding clamping slide or machine body-side clamping parts and only protrude from them with piston head sections of the pressure-operated piston-cylinder units; these head sections can be inserted into the T-slots that are recessed in the tool block to be replaced, perpendicular to the row of the respective tools, and the tool blocks can then be clamped against the pressure surfaces on the machine body or press slide side when the clamping elements are suitably pressurized.
  • the displacement of the piston head sections between a tool block release position, in which the block can be removed from the tool space vertically to the direction of stroke of the press slide, and a position ready for use to fix the respective tool block, is carried out from a central command desk via corresponding pressure medium control devices, preferably a hydraulic control.
  • the piston-cylinder units can be designed as tandem cylinders to achieve high contact pressures in order to obtain smaller piston diameters.
  • pressure medium-actuated centering elements also remain in the machine body or press slide-side clamping parts when the tool block is replaced, which can engage with suitable piston sections in the centering recesses provided on the clamping surface of the respective tool block.
  • These centering elements can be operated from the central control console.
  • the chip can be clamped tightly by means of a corresponding pressure medium control device, preferably also a hydraulic control Control the elements by moving the piston sections of the centering elements into the appropriate centering recesses so that the entire respective tool block is positioned correctly in the correct position while the tool block is clamped.
  • the centering and adjustment accuracy achieved is so high that there is no need for separate alignment of the punch and die-side tools with respect to one another in the horizontal and vertical directions.
  • a punch clamping device is provided between the punch tool block and the press slide, each with coupling tensioning elements aligned with the longitudinal longitudinal axis of the punch, which produce a non-positive, play-free connection between the punch tools on the one hand and the press slide on the other.
  • This coupling clamping elements. capture the respective stamping tools at their rear end sections via a detachable bayonet connection arranged in the area of the stamping tool block separating plane and press these via a pressure piece between the pressing slide and the stamping end in a pressure medium-controlled manner onto the pressing slide front. Due to the contact pressure generated on the press slide front in accordance with the applied pressure, any play on the stamping tools and between them and the press slide is excluded.
  • the contact pressure of the stamping tools, which is maintained and possibly monitored during operation, against the press slide front ensures in every position of the machine parts concerned that there are contact conditions which cannot be achieved with conventional tool clamping devices.
  • a deformation or setting of the loaded tool parts which occurs in conventional devices and which has an effect on the clamping force of the connecting elements is compensated for in the device according to the invention by constant pressurizing of the stamping tools in question, or such wear phenomena cannot occur at all. It can thus be seen that the stamp clamping device of the tool changing device according to the invention makes a large contribution to reducing the wear of the entire tool.
  • Via a pressure switch built into the pressure medium circuit of the stamp clamping device the contact pressure of the clamping device can be monitored during operation or controlled by a corresponding safety device, which stops the machine when the pressure falls below a specified minimum and indicates the type of fault.
  • the die tool block 5 shown in Fig. 1 has a centering plate 2 which receives 33 die tools 1 supported circumferentially in receiving bores, so that an adjacent row of individual die tools is formed for successive forming steps.
  • a bar knife 8 is visible, which is used to cut off blanks to be machined in the tools.
  • individual clamping glasses 3 are placed on the die tools 1, which are each provided with four threaded bores formed at their corner areas.
  • an adapter plate 4 is attached, which supports the die tools 1 at its rear end.
  • the adapter plate 4 forms a relatively large-area support for the die tools 1 in comparison with the illustration in FIG. 5b.
  • three clamping screws 9 are used for each pair of spectacles 3, which clamp the entire die tool block into a ready-to-install tool unit which has an overall low overall depth.
  • the placement of the tensioning screws 9 in the corner areas of the tensioning glasses 3 permits the use of a shrink ring 10, which can be designed to be substantially shorter and without weakening threaded holes than was the case with the conventional die packages according to FIG. 5b .
  • the possible enlargement of the die parts located behind the die tools 1 in the die tool block 5 according to FIG. 5a leads to an overall favorable compressive stress curve within the die support, since larger receiving surfaces are available for absorbing the pressing forces than in the case of conventional dies packages.
  • the pressure force curve to be expected in each example is shown in FIGS. 5a and 5b by dash-dotted lines and indicated as 0a and 0b, respectively.
  • This diameter designation relates to the respective pressure receiving part which is in direct contact with the relevant die package.
  • Corresponding conclusions can be drawn from the diagrams of the compressive stress curves under pressing force given for the two figures, regarding the tool wear to be expected in each case or the material stress.
  • the machine body 25 schematically indicated in FIG. 1 carries a clamping plate 7 on the front, on which the die tool block 5 with its adapter plate 4 can be clamped to a clamping surface 31 which runs transversely with respect to the longitudinal center axes of the die.
  • the entire assembled unit forms the tool change holder 28.
  • five T-grooves 26b running perpendicular to the row of die tools 1 are recessed in the adapter plate 4 for clamping the tool block 5.
  • Correspondingly shaped piston head sections 32b engage in these grooves 26b and form the piston ends of hydraulically actuated piston-cylinder units (clamping elements 6b). 1, two clamping elements 6b are provided in the clamping plate 7 for each groove 26b.
  • the tool block 5 can be removed from the clamping plate 7 at right angles to the axis of the row of die tools 1.
  • a transport device (not shown) can be provided for the corresponding removal of a die tool block removed in this way.
  • the tensioning elements 6b are connected to a central hydraulic arrangement, and their piston displacement can be controlled from a central control desk.
  • the stamping tools 13 are mounted in a stamping tool block 14 and guided in bushings 15.
  • T-grooves 26a are cut out on a clamping surface 29 of this tool block 14, perpendicular to the row of stamping tools 13, in which correspondingly shaped piston head sections 32a of clamping elements 6a engage, which with their pressure medium-actuated piston-cylinder units in a platen 24 of a stamp clamping device 30 are accommodated.
  • the stamping tool block 14 together with the stamp clamping device 30 forms the stamp-side tool change holder 27, which is located on the front of the press slide 22.
  • the tensioning elements 6a are constructed in the same way as the tensioning elements 6b described above, including their pressure medium actuating device.
  • FIG. 2 shows a hydraulically actuated centering element 11 a, which is provided in a corresponding manner between the clamping plate 7 and the adapter plate 4 in the die tool block 5 according to FIG. 1.
  • a centering element is shown in detail in FIG. 3 and is used for centering the respective tool blocks 5 and 14 on their clamping surfaces in the vertical and horizontal direction during the clamping process.
  • the centering element 11b visible in FIG. 3 is accommodated in the clamping plate 7 and has a hydraulically actuated piston, the piston section 34b of which is conically shaped in order to be able to engage in conical surfaces of centering recesses 12b in the adapter plate 4.
  • This hydraulically actuated centering elements 11 a and 11 b are matched to the clamping action of the hydraulic clamping elements 6 a and 6 b, operated from the central control panel, so that an exact positioning takes place essentially simultaneously with the clamping.
  • the centering elements 11a and 11b can, if desired, be held in engagement with their centering recesses 12a and 12b until the vertical displacement of the respective tool block is to take place, for example in the event of an exchange, in order to prevent premature replacement To be able to reliably prevent relocation of the already released tool block. At least two centering elements are required for each tool block.
  • the stamp clamping device 30 has a row of coupling clamping elements 35 which are aligned with the respective longitudinal longitudinal center axes and which can produce a non-positive, play-free connection between the stamping tools 13 on the one hand and the press slide 22 on the other hand.
  • the coupling clamping elements 35 are provided, as shown in FIG. 4, on the side of the clamping plate 24 facing the clamping surface, each with a bayonet connection 17, which has a connecting sleeve 36 on the clamping element side, which can be connected to a sleeve counterpart 37 provided on the rear end section of a stamping tool 13.
  • each of the clamping elements 35 has a hollow piston 16 which is guided within the clamping plate 24 so as to be relatively displaceable under pressure control and in its inner region a pressure piece 19 which can be displaced relatively takes up, which rests on the one hand on the rear end of the stamping tool 13 and on the other hand on a support surface 39 of an adjusting wedge 18 guided vertically displaceably in the pressing slide 22. If, as shown in FIG.
  • the hollow piston 16 is displaced to the right via the pressure medium circuit 38 (hydraulic channels) in the direction of the double arrow shown, with the bayonet connection 17 closed, the stamping tool in question is simultaneously displaced in this direction, as a result of which the tool 13 corresponds to the hydraulic pressure , which acts on the hollow piston 16, is pressed against the adjusting wedge 18 and thus against the front of the press slide 22. If the hydraulic pressure on the hollow piston 16 is maintained, virtually any play between the stamping tool and the press slide front is eliminated.
  • the adjustment wedge 18 visible in FIG. 4 is used for the axial adjustment of the stamping tools.
  • the hollow piston 16 must be made pressure-free so that the pressure piece 19 can be displaced in its interior depending on the vertical adjustment of the wedge 18.
  • a motor drive 23 is shown schematically in FIG. 4, which can perform a desired vertical displacement of the adjustment wedge 18 via a threaded spindle. The control of this drive 23 can also be operated from the central control panel.
  • the hollow piston can be pressurized again in the manner described in order to achieve the axial bracing.
  • a pressure switch can also be installed in the pressure medium circuit 38 of the hollow piston 16 in order to be able to monitor the clamping pressure of the hollow piston.
  • a rotary drive 21 which is indicated only schematically in FIG. 4 and which is also centrally controlled, can rotate all stamping tools 13 until the sleeve parts 36, 37 can be pulled apart.
  • the stamping tools 13 are moved to the left in accordance with FIG. 4 until their rear ends have emerged from the region of the hollow piston 16 and the stamping tool block 14 is guided over the T-grooves 26a in a vertical direction out of the tool space can be.
  • This displacement of the stamping tool block 14 can be carried out by hand or by means of a suitable lifting and transport device (not shown), optionally also remotely controlled.
  • the basic redesign and automation of the die space of metal forming machines according to the invention creates a tool block quick-change system that significantly expands the production possibilities of such metal forming machines. Due to the rapid changeover, small series can now also be produced cheaply, since the tool life is greater than the number of series due to the new structure of the tool blocks and the low-wear clamping method, which is why a replacement of worn tools, which would necessarily result in machine downtime, has become unnecessary . The relatively long changeover times that are customary in conventional forming machines have made the production of small series costly. In addition to these production-related advantages, the working conditions in connection with the tool room are also improved, since a tool block change can be carried out without great effort. Due to the small amount of time required for a tool block change, there is also enough space to e.g. check other units of the metal forming machine and, if necessary, replace them.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Drilling And Boring (AREA)
  • Multi-Process Working Machines And Systems (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP86115967A 1985-11-28 1986-11-18 Werkzeugwechseleinrichtung einer mehrstufigen Umformmaschine Expired EP0224792B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115967T ATE43260T1 (de) 1985-11-28 1986-11-18 Werkzeugwechseleinrichtung einer mehrstufigen umformmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5089/85 1985-11-28
CH508985 1985-11-28

Publications (2)

Publication Number Publication Date
EP0224792A1 EP0224792A1 (de) 1987-06-10
EP0224792B1 true EP0224792B1 (de) 1989-05-24

Family

ID=4287751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115967A Expired EP0224792B1 (de) 1985-11-28 1986-11-18 Werkzeugwechseleinrichtung einer mehrstufigen Umformmaschine

Country Status (5)

Country Link
US (1) US4791803A (enrdf_load_stackoverflow)
EP (1) EP0224792B1 (enrdf_load_stackoverflow)
JP (1) JPH04157027A (enrdf_load_stackoverflow)
AT (1) ATE43260T1 (enrdf_load_stackoverflow)
DE (1) DE3663460D1 (enrdf_load_stackoverflow)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807075A1 (de) * 1988-03-04 1989-09-14 Peddinghaus Rolf Werkzeugtraeger fuer eine stanzmaschine
US4898017A (en) * 1988-08-09 1990-02-06 The National Machinery Company Quick-change tooling for progressive formers and the like
US4911632A (en) * 1988-12-09 1990-03-27 Dana Corporation Quick change holder for mold inserts
US4970889A (en) * 1989-05-12 1990-11-20 Amp Incorporated Crimping machine having improved adjusting system
US5001922A (en) * 1989-11-01 1991-03-26 Dana Corporation Quick change tooling for press machine
US5704245A (en) * 1996-05-31 1998-01-06 The National Machinery Company Progressive forging machine with individually adjustable tools
US5829302A (en) * 1996-05-31 1998-11-03 The National Machinery Company Cassette tooling
US5946966A (en) * 1997-09-24 1999-09-07 Tool Dex, Inc. Upset forging machine assembly having a quick change header
US5884520A (en) * 1997-11-17 1999-03-23 The Whitaker Corporation Die set having shut height adjust and stripper plate actuator mechanisms
DE19941925B4 (de) * 1999-09-03 2007-11-29 Schuler Pressen Gmbh & Co. Kg Verstellplatte für eine Presse
CN1087667C (zh) * 1999-12-17 2002-07-17 清华大学 多冲头单工序连续冲裁模的设计方法
DE10063154B4 (de) * 2000-12-18 2005-02-10 Nedschroef Herentals N.V. Schmiedepresse mit Stellvorrichtung auf Matrizenseite
EP3095578B1 (en) 2011-08-04 2018-11-28 Husky Injection Molding Systems Ltd. A method of operating a mold comprising a neck ring and neck ring
WO2013140442A1 (ja) * 2012-03-21 2013-09-26 旭サナック株式会社 圧造機
CN103447449B (zh) * 2013-09-11 2015-08-05 郑州机械研究所 适用于多工位冷镦机离线快速换模的机构
EP2848398B1 (de) * 2013-09-14 2016-03-09 Feintool International Holding AG Vorrichtung und Verfahren zum Verhindern des Bruchs eines Werkzeug beim Feinschneiden und/oder Umformen eines Werkstücks
CN105583301B (zh) * 2016-02-16 2018-01-02 佛山市顺德区锦昌机械实业有限公司 数控冲床阵列式模具安装结构
CN110270655B (zh) * 2018-03-15 2020-07-03 辽宁五一八内燃机配件有限公司 一种曲轴扭拐模具安装方法及装置
CN116038335B (zh) * 2022-05-26 2024-01-05 芜湖聚达汽车零部件有限公司 一种制动泵的加工装置及加工工艺
CN115846580B (zh) * 2022-12-16 2023-09-12 江苏新成标准件有限公司 一种高强度螺栓冷镦设备及其制备螺栓的工艺

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE220522C (de) * 1908-12-11 1910-04-02 Kohlensäure-Kompresse
DE1177935B (de) * 1952-05-27 1964-09-10 Mueller Fritz Einrichtung zum Festspannen einer Werkzeug-traegerplatte am Stoessel oder Tisch einer Presse
US3002479A (en) * 1957-06-10 1961-10-03 Us Industries Inc Movable bolster for metal working press
US3559446A (en) * 1968-03-29 1971-02-02 Nat Machinery Co The Forging machine
US3752028A (en) * 1971-10-04 1973-08-14 Gem City Eng Co Die apparatus for fine blank stamping
JPS50733A (enrdf_load_stackoverflow) * 1973-05-02 1975-01-07
DE2740617A1 (de) * 1977-09-09 1979-03-22 Peltzer & Ehlers Umformpresse, insbesondere mehrstufenpresse
US4238950A (en) * 1979-04-09 1980-12-16 Gulf & Western Manufacturing Company Bolster arrangement for opposed slide double acting press

Also Published As

Publication number Publication date
US4791803A (en) 1988-12-20
DE3663460D1 (en) 1989-06-29
EP0224792A1 (de) 1987-06-10
JPH0513737B2 (enrdf_load_stackoverflow) 1993-02-23
JPH04157027A (ja) 1992-05-29
ATE43260T1 (de) 1989-06-15

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