US3834218A - Forging press - Google Patents

Forging press Download PDF

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Publication number
US3834218A
US3834218A US00381498A US38149873A US3834218A US 3834218 A US3834218 A US 3834218A US 00381498 A US00381498 A US 00381498A US 38149873 A US38149873 A US 38149873A US 3834218 A US3834218 A US 3834218A
Authority
US
United States
Prior art keywords
additional
tool
press ram
magazine
press
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
US00381498A
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English (en)
Inventor
B Kralowetz
H Grill
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.)
GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG
Original Assignee
GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau 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 GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG filed Critical GFM Gesellschaft fuer Fertigungstechnik und Maschinenbau AG
Application granted granted Critical
Publication of US3834218A publication Critical patent/US3834218A/en
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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0035—Forging or pressing devices as units
    • B21B15/0042—Tool changers
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T483/00—Tool changing
    • Y10T483/17—Tool changing including machine tool or component
    • Y10T483/1729—Reciprocating tool machine tool [e.g., broaching machine, shaping machine, etc.]
    • Y10T483/1731—Reciprocating tool machine tool [e.g., broaching machine, shaping machine, etc.] including matrix

Definitions

  • the press comprises a forging box and at least one horizontal press ram having a free end. Gripping means are mounted on said free end and spring-biased in a closing sense.
  • a first tool assembly comprising a tool frame and a tool is held by said gripping means on said free end of said press ram.
  • a rotatable magazine comprises a plurality of angularly spaced retaining clamps, which are spring-biased in a closing sense.
  • a second tool assembly is retained by one of said retaining clamps.
  • First and second releasing means are mounted on said forging box.
  • the press ram is movable to a tool-changing position, in which said gripping means are adapted to be opened by the operation of said first releasing means.
  • Said magazine is rotatable to any of a plurality of angular positions, in each of which one of said retaining clamps is adapted to be opened by said second releasing means and closely adjacent to and in register with said gripping means when said press ram is in said tool-changing position.
  • Said first tool assembly can be transferred from said gripping means to one of said retaining clamps when said press ram is in said tool-changing position and said magazine is in one of said angular positions.
  • Said second tool assembly can subsequently be transferred from another of said retaining clamps to said gripping means when said magazine has been rotated to another of said angular positions and said press ram is in PAIENTEDSEP I man SHEET 2 0F 3 FORGING PRESS
  • This invention relates to apparatus for changing the tools in forging presses which comprise preferably two horizontal press rams which carry the tools at their ends.
  • a rotatable magazine for holding a plurality of tools is associated with each press ram, the tools mounted in respective tool frames are adapted to be clamped to the press ram by gripping jaws and to be secured to the rotatable magazine by retaining clamps, and stationary pressure fluid-operated actuators or the like are secured to the forging box and provided with pressure-exerting rams and with expanding rams for automatically opening the gripping jaws and retaining clips, respectively, which are spring-loaded in a closing sense.
  • This tool-changing apparatus can be used to change the tools on all press rams simultaneously without need for manual effort.
  • the human activity involved is restricted to mere controlling and checking functions. As soon as the rotatable magazines have been filled with a predetermined set of tools, the machine is ready for its working program, which can now be fully automatically performed.
  • separate tool frames are provided, in which the tools are secured and which are secured to the press rams or in the magazines.
  • the press rams are retracted and the magazines are rotated until the desired tools face the press rams.
  • the tools are then secured to the press rams by the gripping jaws and the retaining clamps are opened to release the tools from the magazines. Because the jaws and clamps are spring-loaded in the closing sense, a secure fixation of the tools on the press rams and in the magazines is ensured and an undesired detaching of the tool is prevented.
  • the sequence of operations is performed in the reverse order so that the magazines receive the tools from the press rams in that the retaining clamps grip the tools and when the retaining clamps have snapped in on the tools the gripping jaws are opened to permit of a rotation of the rotatable magazines until the new tools are in position.
  • the gripping jaws and retaining clamps are opened against spring force by pressure-exerting and expanding rams, respectively, which are operated by pressure fluid-operated actuators or the like.
  • the actuators themselves are stationary and secured to the forging box so that movable conduits, couplings and the like are not required and the jaws or clamps can be opened only when the magazines and press rams are in predetermined positions. It will be understood that all operations performed by this changing apparatus are controlled by control means in such a manner that wrong operations need not be feared and, e.g., the gripping jaws can be opened only when the retaining clamps hold the tool in position, etc.
  • the rotatable magazines are rotatable about an axis which includes an angle of 45 with the associated press ram and have receiving brackets or the like, which protrude from the periphery of the magazines and carry the retaining clamps and form stops for the tool frames and extend also at an angle of 45 to that axis of rotation.
  • the provision of the receiving brackets permits of an exact positioning of the tools which are mounted in the tool frames because the receiving brackets embrace the tool frames, which engage stops and can easily be held in this defined position by the retaining clamps.
  • the machine may be built with a low overall height because the rotatable magazines do not excessively protrude upwardly.
  • This arrangement ensures also that during each revolution of the magazine the receiving brackets are once at right angles and once parallel to the axis of the press ram.
  • the tools can be introduced into the magazines in a very simple manner because it is sufficient to lower the tools from above between the'brackets by a crane or the like and the tools can be immediately moved to the correct position for the retaining clamps. It will be understood that for a tool change the receiving brackets are at right angles to the axis of the press rams so that the tool frame and the tool are in a plane that is normal to the press ram.
  • each press ram is provided with a backing plate, which serves to carry the tool and on which the gripping jaws are mounted.
  • the backing plate is firmly but detachably connected to the press ram by necked-down screws so that the backing plate can be replaced in case of damage or when repairs are required whereas it is not necessary to knock down the entire machine in such case as would be required if the gripping jaws or tools were directly secured to the press rams.
  • FIG. 1 is a side elevation showing a forging press provided with apparatus for changing the tools
  • FIG. 2 is an end view showing a press ram together with a backing plate, a tool, a tool frame, and receiving brackets of the magazine, and
  • FIGS. 3 to 5 are sectional views taken on lines III- -III, lV-IV and VV, respectively, in FIG. 2.
  • the forging press 1 comprises two horizontal press rams 2, which strike one against thqother and at their ends carry tools 3.
  • Ram-adjusting means 5 are provided to adjust the stroke position of the rams.
  • the press rams 2 are driven by eccentric shafts, which can be uncoupled from the drive motor 7 by clutches 6.
  • a brake 8 serves to brake the moving parts and to arrest the press rams at their rear dead center.
  • a rotatable magazine 9 is associated with each press ram 2 and can hold a plurality of tools 3 in receiving brackets 10.
  • the axis of rotation of each rotatable magazine 9 is inclined by an angle of 45 to the axis of the associated ram.
  • the receiving brackets 10 include an angle of 45 with the axis of rotation of the magazine.
  • the tools 3 can either be gripped in position on the press ram 2 by gripping jaws 11 or be secured to the rotatable magazine 9 by retaining clamps 12.
  • the gripping jaws 11 and the retaining clips 12 are biased in a closing sense by spring elements 13, 14 and can be opened only against this spring force.
  • Pressure-exerting rams l5 serve to open the gripping jaws ll.
  • Expanding rams 16 are provided to open the retaining clamps 12.
  • the pressure-exerting and expanding rams are operated by stationary fluid press-operated actuators 17, 18, which are secured to the forging box 4.
  • the retaining clamps 12 are mounted on the receiving brackets 10 of the rotatable magazines 9, and the gripping jaws 11 are pivoted to a backing plate 20, which is detachably connected to the respective press ram 2 by necked-down screws, not shown.
  • the tool 3 is enclosed by a tool frame 21, which is either clamped by the gripping jaws ll against the backing plate 20 and the press ram 2 or is clamped by retaining clamps 12 on the receiving bracket 10 of the magazine 9.
  • the receiving brackets 10 are provided with stops l9 and the backing plate 20 is provided with centering steps 22.
  • the tool-changing apparatus does not substantially increase the overall height of the entire forging press 1.
  • the receiving brackets 10 can be moved to a position in which they are normal to the press rams and to a position in which they are parallel to the press rams.
  • the tools 3 cannot be changed and cannot be clamped in position on the press rams 2 unless the tool frame 21 and the base of the tool 3 are parallel to the end face of the press ram and to the backing plate 20. This will be the case when the receiving brackets 10 are normal to the axis of the press ram.
  • the receiving brackets are horizontal, i.e., parallel to the press rams
  • the spring-loaded gripping jaws close automatically and clamp the tool frames and tools against the backing plates.
  • the expanding rams 16 can be operated to open the retaining clamps 12 so that the tool frames 21 are released from the magazines.
  • the press rams are now provided with the tools and ready for operation.
  • the rotatable magazines remain in their position so that when the tools are to be changed again the magazines can immediately receive with the same receiving brackets as before the tools which are to be changed.
  • the press rams are again braked at their rear dead centers and by the adjusting means the tools are then slowly moved into the receiving brackets until the tools have been guided by the stops to the correct position, in which they are engaged by the retaining clamps.
  • the gripping jaws are now opened, the press rams are retracted, and the magazines which are now freely rotatable are rotated until the next tools face the backing plates and press rams.
  • the stationary pressure fluidoperated actuators for operating the pressure-exerting and expanding rams serving to open the gripping jaws and retaining clamps are secured to the forging box and for this reason need not follow any movement performed during the toolchanging or forging operation. For this reason, complicated telescopic conduits or the like are not required. Stationary conduits are sufficient and do not involve any problems.
  • the tool-changing apparatus according to the invention is fully automatically operated by control and checking means which are not described more fully and serve to coordinate the various movements performed in succession.
  • the tool-changing operation itself does no longer require human force and may be performed under control of an operator.
  • a forging press which comprises a forging box
  • At least one horizontal press ram having a free end
  • gripping means mounted on said free end and springbiased in a closing sense
  • a first tool assembly comprising a tool frame and a tool and held by said gripping means on said free end of said press ram
  • a rotatable magazine which comprises a plurality of angularly spaced retaining clamps, which are spring-biased in a closing sense
  • said press ram being movable to a tool-changing position, in which said gripping means are adapted to be opened by the operation of said first releasing means,
  • said magazine being rotatable to any of a plurality of angular positions, in each of which one of said retaining clamps is adapted to be opened by said second releasing means and closely adjacent to and in register with said gripping means when said press ram is in said tool-changing position,
  • said first tool assembly can be transferred from said gripping means to one of said retaining clamps when said press ram is in said tool-changing position and said magazine is in one of said angular positions, and said second tool assembly can subsequently be transferred from another of said retaining clamps to said gripping means when said magazine has been rotated to another of said angular positions and said press ram is in said tool-changing position.
  • each of said first and second releasing means comprise a stationary, pressure fluid-operated actuator mounted on said forging box.
  • said second releasing means comprise a second ram which is engageable with each of said retaining clamps to open the same when said magazine is in such an angular position that said clamp is closely adjacent to and in register with said gripping means when said press ram is in said tool-changing position.
  • an additional first tool assembly comprising a tool frame and a tool and held by said additional gripping means on said free end of said additional press ram
  • an additional rotatable magazine which comprises a plurality of angularly spaced additional retaining clamps, which are spring-biased in a closing sense
  • said additional press ram being movable to a toolchanging position, in which said additional gripping means are adapted to be opened by the operation of said first releasing means,
  • said additional magazine being rotatable to any of a plurality of angular positions, in each of which one of said additional retaining clamps is adapted to be opened by said additional second releasing means and closely adjacent to and in register with said additional gripping means when said additional press ram is in its said tool-changing position,
  • said additional first tool assembly can be transferred from said additional gripping means to one of said additional retaining clamps when said additional magazine is in one of its said angular positions, and said additional second tool assembly can subsequently be transferred from another of said additional retaining clamps to said additional gripping means when said additional magazine has been rotated to another of its said angular positions and said additional press ram is in its said toolchanging position.
  • said magazine carries a plurality of receiving brackets which protrude from the periphery of said magazine and include an angle of 45 with said axis of rotation, and
  • each of said receiving brackets carries one of said retaining clamps and comprises a stop that is engageable by one of said tool frames.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
US00381498A 1972-08-08 1973-07-23 Forging press Expired - Lifetime US3834218A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT684872A AT312397B (de) 1972-08-08 1972-08-08 Vorrichtung zum Wechseln der Werkzeuge bei Schmiedepressen

Publications (1)

Publication Number Publication Date
US3834218A true US3834218A (en) 1974-09-10

Family

ID=3590377

Family Applications (1)

Application Number Title Priority Date Filing Date
US00381498A Expired - Lifetime US3834218A (en) 1972-08-08 1973-07-23 Forging press

Country Status (6)

Country Link
US (1) US3834218A (enrdf_load_stackoverflow)
JP (1) JPS4945868A (enrdf_load_stackoverflow)
AT (1) AT312397B (enrdf_load_stackoverflow)
DD (1) DD104442A5 (enrdf_load_stackoverflow)
DE (1) DE2330485A1 (enrdf_load_stackoverflow)
FR (1) FR2195492B3 (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184358A (en) * 1978-04-27 1980-01-22 Gorlitsin Sergei N Device for mounting a tool on the movable crossbeam of a press
US4304041A (en) * 1980-01-04 1981-12-08 The National Machinery Company Automatic tool changer for forging machines
US4393685A (en) * 1981-02-23 1983-07-19 Yoshikazu Sakamura Tool attaching device for presses
US4847978A (en) * 1987-10-28 1989-07-18 Litton Industrial Automation Systems, Inc. Tool head changer and drive mechanism
US5168744A (en) * 1990-09-17 1992-12-08 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for replacing pressing dies in upsetting press
US5176604A (en) * 1991-03-29 1993-01-05 K. K. Sakamurakikai Seisakusho Tool replacement for a multi-stage press machine
CN102989976A (zh) * 2011-09-12 2013-03-27 日立金属株式会社 锻造装置
CN112222215A (zh) * 2020-09-02 2021-01-15 宁波市镇海甬鼎紧固件制造有限公司 一种可调节双头螺栓成型模具

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1569335A (en) * 1976-10-30 1980-06-11 Sumitomo Metal Ind Die forging press
CS245202B1 (en) * 1981-04-07 1986-09-18 Ivan Kamelander Device for tools' automatic exchange with horizontal multi-operational transfer presses
AT389067B (de) * 1987-12-09 1989-10-10 Laeis & Bucher Gmbh Spanneinrichtung fuer pressenwerkzeuge
DE3925452C1 (enrdf_load_stackoverflow) * 1989-08-01 1991-04-25 Gebr. Felss Gmbh + Co Kg, 7535 Koenigsbach-Stein, De
JPH0683198U (ja) * 1993-04-26 1994-11-29 石川島播磨重工業株式会社 鍛造プレスの鍛造工具クランプ装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316629A (en) * 1963-09-18 1967-05-02 Monarch Machine Tool Co Machine tool tool changer
US3466971A (en) * 1963-09-18 1969-09-16 Monarch Machine Tool Co Tool holder
US3604083A (en) * 1967-07-29 1971-09-14 Olivetti & Co Spa Tool change device for a machine tool
US3762036A (en) * 1970-05-29 1973-10-02 Bw Weber Verwaltungs Gmbh Machine tool with tool exchanging mechanism
US3779122A (en) * 1972-07-24 1973-12-18 Whitney Corp W Punch press with assembly locking mechanism

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3316629A (en) * 1963-09-18 1967-05-02 Monarch Machine Tool Co Machine tool tool changer
US3466971A (en) * 1963-09-18 1969-09-16 Monarch Machine Tool Co Tool holder
US3604083A (en) * 1967-07-29 1971-09-14 Olivetti & Co Spa Tool change device for a machine tool
US3762036A (en) * 1970-05-29 1973-10-02 Bw Weber Verwaltungs Gmbh Machine tool with tool exchanging mechanism
US3779122A (en) * 1972-07-24 1973-12-18 Whitney Corp W Punch press with assembly locking mechanism

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184358A (en) * 1978-04-27 1980-01-22 Gorlitsin Sergei N Device for mounting a tool on the movable crossbeam of a press
US4304041A (en) * 1980-01-04 1981-12-08 The National Machinery Company Automatic tool changer for forging machines
US4393685A (en) * 1981-02-23 1983-07-19 Yoshikazu Sakamura Tool attaching device for presses
US4847978A (en) * 1987-10-28 1989-07-18 Litton Industrial Automation Systems, Inc. Tool head changer and drive mechanism
US5168744A (en) * 1990-09-17 1992-12-08 Sms Schloemann-Siemag Aktiengesellschaft Apparatus for replacing pressing dies in upsetting press
US5176604A (en) * 1991-03-29 1993-01-05 K. K. Sakamurakikai Seisakusho Tool replacement for a multi-stage press machine
CN102989976A (zh) * 2011-09-12 2013-03-27 日立金属株式会社 锻造装置
CN102989976B (zh) * 2011-09-12 2015-12-02 日立金属株式会社 锻造装置
CN112222215A (zh) * 2020-09-02 2021-01-15 宁波市镇海甬鼎紧固件制造有限公司 一种可调节双头螺栓成型模具

Also Published As

Publication number Publication date
JPS4945868A (enrdf_load_stackoverflow) 1974-05-01
DD104442A5 (enrdf_load_stackoverflow) 1974-03-12
AT312397B (de) 1973-12-27
FR2195492A1 (enrdf_load_stackoverflow) 1974-03-08
FR2195492B3 (enrdf_load_stackoverflow) 1976-06-25
DE2330485A1 (de) 1974-02-21

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