US3834216A - Forging press - Google Patents

Forging press Download PDF

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Publication number
US3834216A
US3834216A US00374221A US37422173A US3834216A US 3834216 A US3834216 A US 3834216A US 00374221 A US00374221 A US 00374221A US 37422173 A US37422173 A US 37422173A US 3834216 A US3834216 A US 3834216A
Authority
US
United States
Prior art keywords
clamping
forging press
pin
pressure
means includes
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
US00374221A
Other languages
English (en)
Inventor
W Schiller
P Obladen
L Peters
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.)
Eumuco AG fuer Maschinenbau
Original Assignee
Eumuco AG fuer Maschinenbau
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 Eumuco AG fuer Maschinenbau filed Critical Eumuco AG fuer Maschinenbau
Application granted granted Critical
Publication of US3834216A publication Critical patent/US3834216A/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
    • B21J9/00—Forging presses
    • B21J9/10—Drives for forging presses
    • B21J9/18—Drives for forging presses operated by making use of gearing mechanisms, e.g. levers, spindles, crankshafts, eccentrics, toggle-levers, rack bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0029—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height
    • B30B15/0035—Details of, or accessories for, presses; Auxiliary measures in connection with pressing means for adjusting the space between the press slide and the press table, i.e. the shut height using an adjustable connection between the press drive means and the press slide
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2173—Cranks and wrist pins
    • Y10T74/2179—Adjustable

Definitions

  • a pressure transmitting means is disposed between the pressure rod and the slide or ram member of a forging press.
  • the pressure transmitting means has over its entire width in the lower zone thereof facing in a direction toward the slide member, a diameter different from another diameter in the upper zone which faces in a direction toward the pressure rod. The diameters are offset with respect to each other on one side of the transmitting means and are in contact with each other on the other side of the transmitting means.
  • the pressure rod is connected to the pressure transmitting means which is a pin member in a specific embodiment so that forces acting eccentrically on the slide or rod member can be rectilinearly transmitted to the eccentric crankshaft of the forging press by the slide or ram member and the pressure rod.
  • the invention relates to a forging press having a device for adjusting the stroke position of the slide or ram member which carries the forging tool.
  • the invention is directed to a drop forging press having a driven crankshaft including an eccentric portion, a pressing rod and guides or rams which carry the forging tool.
  • the eccentric sleeve is adjustably mounted about a pin arranged in the slide or ram member. Consequently, the forces which are transmitted from the eccentric shaft via the pressure rod to the slide member have to be discharged via the slide pin which is thereby subjected to bending stresses. Furthermore, it is disadvantageous that the pressure rod must be designed to be relatively narrow in view of the mounting on both sides of the pin.
  • the primary object of this invention is to provide an assembly or structural combination for effecting the stroke position adjustment for the slide or ram member of forging presses and the like.
  • a further object of this invention is to provide a stroke position adjustment mechanism having a stronger and wider design of the pressure rod and the slide member so that the elements are uniformly stressed and any possibility of a tilting moment being set up within the forging press is obviated.
  • the forging press includes a mechanism or device for varying the stroke position of the slide or ram member with respect to the press table.
  • This device includes an adjustable, pivotal eccentric element and a device for arresting the same.
  • the mechanism includes a pressure transmitting pin which is disposed between the pressure rod and the slide member.
  • the pressure transmitting pin has, over the entire width in the lower zone facing toward the slide member, a diameter differing from another diameter in the upper zone which faces toward the pressure rod. Both diameters are offset with respect to each other on one side of the pin and contact each other on the other side of the pin.
  • the pressure transmitting pin includes pin studs which are located at each end thereof and are engaged by projections disposed on the pressure rod.
  • the transmission pin permits the construction of a pressure rod mounting at the slide which extends over the entire width of the slide. Consequently, forces acting eccentrically on the slide member can be rectilinearly transmitted to the eccentric shaft by the slide and the pressure rod. Tilting of the slide or ram member is reliably prevented. Furthermore, no bending stress is set up in the pressure transmitting pin.
  • the essential factor with the adjusting pin is that the diffemet diameters necessary for adjustment and having eccentric position with respect to each other are not arranged juxtaposed in the longitudinal axis. The center points for the different diameters are laterally displaced with respect to each other.
  • Another feature of the invention incorporates the use of a clamping bow between the slide member and the pressure transmitting pin for arresting the adjusting device.
  • the clamping bow is adapted to be tensioned on the pressure transmitting pin by means of balancing or compensating cylinders.
  • the clamping bow is arranged in the central transverse plane of the pressure transmitting pin.
  • the clamping bow constitutes a reliable and safe means for tensioning the pressure transmitting pin and for maintaining the angular position which has been set on the pressure transmitting pin.
  • the arrangement may be such that one of the balancing cylinders engages on the clamping bow via a bell crank lever and the other via a cantilever arm.
  • the adjusting device which is used for adjusting the pressure transmitting pin expediently acts on the lower zone of the transmitting pin and is advantageously mounted in the slide or ram member which carries the forging tool.
  • FIG. 1 is a diagramatic elevational view of a forging press made in accordance with this invention
  • FIG. 2 is a diagramatic elevational view partly in section of the forging press in FIG. 1 showing the adjustment mechanism for varying the stroke position of the slide or ram member,
  • FIG. 3 is a longitudinal sectional view taken along the line III-III of FIG. 2, and
  • FIG. 4 is a fragmentary sectional view taken along the line IV-IV of FIG. 3.
  • the forging press generally designated 1
  • the forging press has a driven crankshaft 2 which is mounted in the upright frame structure 3.
  • the motor 4 drives the crankshaft 2 by means of the transmission belt 5 with the interposition of a flywheel 6 and a coupling or clutch (not shown). Intermediate gearing may be interposed.
  • the eccentric crankshaft 2 has an eccentric portion 7 surrounded by a pressure rod 8 acting on the slide or ram member 9 which carries the upper tool of the forging press.
  • the lower tool of the forging press is secured on the platen 10.
  • a pressure transmitting means includes a pin 11 which is disposed between the pressure rod 8 and the slide member 9.
  • the pin 11 extends over the entire width of the slide member 9.
  • the continuous pin 11 has a first diameter or radius in the lower zone thereof which faces toward the slide member 9 over the entire width different than another diameter located in the upper zone of the pin and facing toward the pressure rod 8.
  • the center point 12 is for the radius 14 located in the lower zone of the pin 11.
  • the center point 13 is for the radius 15 in the upper zone of the pin 11.
  • the center points 12 and 13 are offset with respect to each other and are laterally displaced for a spacing or gap 16. Both of the diameters or radii from the center points 12 and 13 contact each other on one side of the pressure transmission pin 11. See the righthand side of pin 11 when viewing FIG. 2.
  • step or transition location 17 on the opposite side in the surface of the pin 11. That is, the diameters or radii l4 and 15 are offset with respect to each other on the other side of the pin.
  • the step or transition location 17 has a value of twice the amount of eccentricity or spacing 16 of both diameters.
  • Studs 11a are located at the end faces of the pressure transmitting pin 11 and have a rotational axis located at the center point 13 of the studs 11a.
  • the pressure rod 8 includes projections 80 which engage the studs 11a as shown in FIG. 3.
  • the pressure rod 8 has a concave design above the upper zone of the pressure transmitting pin 11 which engages the pressure rod 8 as shown in FIG. 4.
  • a bowed clamping member 18 is pivotably mounted on the slide member 9 and is movable between a clamping position and an unclamped position.
  • the bowed member 18 is used for effecting connection between the slide member 9 and the pressure transmittingpin 11 in the pull-back direction.
  • the bowed member 18 has simultaneously the task of jamming the pressure transmitting pin 11 fast in its position set with the adjustment during the operation of the press.
  • the clamping bow 18 is tensioned or secured on the pressure transmitting pin 11 with the aid of balancing cylinders 19.
  • the arresting mechanism includes means to effect movement of the clamping member 18 between the clamping position and an unclamped position.
  • the moving means includes balancing cylinders 19 and 19a for effecting movement of the clamping bow 18 around its pivot point.
  • the tensioning or securing of the clamping bow 18 can be effected on one side of the bowed member 18 by means of a bell crank lever 20 mounted to pivot around the shaft 21.
  • the piston rod 22 of the cylinder 19 engages the free end of the bell crank lever 20 to effect the pivotal movement of the bell crank lever 20.
  • the clamping bow 18 is mounted to pivot on the shaft 23 which is mounted in the slide 19.
  • the clamping bow 18 has a cantilever arm 18a to which the piston rod 24 of the other balancing cylinder 19a is articulated.
  • the clamping bow 18 is expediently disposed in the central transverse plane of the pressure transmitting pin 11.
  • An adjusting device, generally designated 25, is mounted to pivot within the slide member 9 and to cooperate with the lower zone of the transmitting pin 11.
  • the pin 11 includes a worm toothing 26 formed in its lower zone to mesh with the worm 27 which constitutes a portion of the adjusting device 25.
  • the adjusting device 25 may be actuated either manually or with the aid of an electrical, pneumatic or hydraulic motor.
  • the balancing cylinders 19 and 19a are vented by way of a valve (not shown) which is, for example, manually operated whereby the clamping effect of the clamping bow 18 is eliminated.
  • a valve (not shown) which is, for example, manually operated whereby the clamping effect of the clamping bow 18 is eliminated.
  • the pressure transmitting pin 11 rotates about its central axis 12 and the slide stroke position changes.
  • the balancing cylinders 19 and 19a are again subjected to action. Consequently, the pressure transmitting pin 11 is tensioned in its adjusted position through the action of the cylinders 19 and 19a on the rods 22 and 24, respectively, so that the clamping bow 18 pivots in a counterclockwise direction around the shaft 23 as shown in FIG. 2.
  • the primary function of the balancing cylinders 19 and 19a is to prestress the slide member 9 which carries the tool and the pressure rod 8 and also, optionally, the eccentric rod shaft 2 in the loading directionof the press.
  • the supplementary function is to effect tensioning of the pressure transmitting pin 11. The primary function is not detrimentally affected due to the supplementary function.
  • a forging press having a driven crankshaft including an eccentric portion, a pressure rod, a slide or ram member which carries the forging tool, an adjustment mechanism for varying the stroke position of the slide member with respect to the platen and means for arresting said adjustment mechanism, the combination comprising:
  • said pressure transmitting means having, in the lower zone facing in a direction toward the slide member, a first diameter different from another diameter in the upper zone facing in a direction toward the pressure rod,
  • said pressure transmitting means includes a pin member having pin studs disposed at each end thereof and the first diameter extending over its entire width in the lower zone thereof.
  • said projections being disposed on the pressure rod which extends in length over the entire width of the pm.
  • arresting means includes balancing cylinders and a clamping bow adapted to be tensioned on the pressure transmitting means by the balancing cylinders.
  • arresting means includes a clamping bow arranged in the central transverse plane of the pressure transmitting means.
  • said arresting device includes a clamping bow and means for effecting the movement of the clamping bow between a clamping position and an unclamped position.
  • said arresting means includes a means for clamping the pressure transmitting means into a fixed clamping position and means for moving the clamping means between a clamping position and an unclamped position.
  • said clamping means includes a pivotally mounted clamping bow having a cantilever arm connected to one side thereof,
  • said arresting means includes a bell crank lever acting on the other side of the clamping bow so that a force on either the bell crank lever or the cantilever arm will tend to pivot the clamping bow about its pivot point.
  • said moving means includes balancing cylinders and a means for connecting a first cylinder to operate the bell crank lever and a second cylinder to act on the cantilever arm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
US00374221A 1972-06-28 1973-06-27 Forging press Expired - Lifetime US3834216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2231579A DE2231579C3 (de) 1972-06-28 1972-06-28 Schmiedepresse, insbesondere Gesenkschmiedepresse

Publications (1)

Publication Number Publication Date
US3834216A true US3834216A (en) 1974-09-10

Family

ID=5849035

Family Applications (1)

Application Number Title Priority Date Filing Date
US00374221A Expired - Lifetime US3834216A (en) 1972-06-28 1973-06-27 Forging press

Country Status (6)

Country Link
US (1) US3834216A (ja)
JP (1) JPS5516739B2 (ja)
DE (1) DE2231579C3 (ja)
FR (1) FR2190546B1 (ja)
GB (1) GB1431494A (ja)
IT (1) IT989463B (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4069697A (en) * 1976-11-10 1978-01-24 Kasel Steel Corporation Automatic counterbalance control circuit
US4819474A (en) * 1987-02-19 1989-04-11 Eumuco Aktiengesellschaft Fur Maschinenbau Metal forming machine having a stroke position adjusting assembly
US4825681A (en) * 1987-01-22 1989-05-02 Kenneth L. Smedberg Pneumatic press counterbalance and cushion construction
US4860571A (en) * 1986-09-26 1989-08-29 Kenneth L. Smedberg Power press with improved cushioning system
US5000021A (en) * 1988-09-12 1991-03-19 Kurimoto Ltd. Load control device for use in automatic forging press
US5009091A (en) * 1989-03-31 1991-04-23 Hinterman William H Press counterbalance system
CN1035221C (zh) * 1993-04-26 1997-06-18 惠特克公司 压头驱动装置
US5666838A (en) * 1995-06-05 1997-09-16 Efco, Incorporated Forging press for use with automated multi-station transport system
US6164147A (en) * 1999-02-05 2000-12-26 The Minster Machine Company Adjustable link motion press
US6311612B1 (en) 1999-07-12 2001-11-06 The Minster Machine Company Link adjustment member

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3451214B2 (ja) * 1998-07-17 2003-09-29 株式会社山田ドビー プレス機
JP4944823B2 (ja) * 2008-03-26 2012-06-06 住友重機械テクノフォート株式会社 鍛造プレス
JP5113576B2 (ja) * 2008-03-26 2013-01-09 住友重機械テクノフォート株式会社 鍛造プレス
DE102008057019A1 (de) * 2008-11-12 2010-05-20 Reinhard Schmid Umformwerkzeug zur Bearbeitung von Werkstücken
JP5683439B2 (ja) * 2011-11-22 2015-03-11 アイダエンジニアリング株式会社 プレス機械のスティック解除装置
JP6606157B2 (ja) 2017-11-15 2019-11-13 ファナック株式会社 ロータおよび回転電機

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1872242A (en) * 1930-05-01 1932-08-16 Gen Machinery Corp Press
US2232889A (en) * 1938-12-23 1941-02-25 Spencer Frank William High-speed forging press
US2767601A (en) * 1953-06-15 1956-10-23 Erie Foundry Company Counterbalance cylinder for forging presses and the like
GB851019A (en) * 1957-02-11 1960-10-12 Massey Ltd B & S Improvements in or relating to metal working presses
DE1260928B (de) * 1963-07-13 1968-02-08 Smeralovy Zd Y Narodni Podnik Vorrichtung zum Freisetzen eines festgeklemmten Stoessels einer vertikalen Schmiedepresse
US3726123A (en) * 1970-09-30 1973-04-10 Hasenclever Gmbh Maschf Forging press with adjustable working gap

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB522055A (en) * 1938-12-23 1940-06-07 Frank William Spencer High-speed forging press
JPS424477Y1 (ja) * 1964-09-03 1967-03-10
DD95547A1 (ja) * 1972-04-03 1973-02-12

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1872242A (en) * 1930-05-01 1932-08-16 Gen Machinery Corp Press
US2232889A (en) * 1938-12-23 1941-02-25 Spencer Frank William High-speed forging press
US2767601A (en) * 1953-06-15 1956-10-23 Erie Foundry Company Counterbalance cylinder for forging presses and the like
GB851019A (en) * 1957-02-11 1960-10-12 Massey Ltd B & S Improvements in or relating to metal working presses
DE1260928B (de) * 1963-07-13 1968-02-08 Smeralovy Zd Y Narodni Podnik Vorrichtung zum Freisetzen eines festgeklemmten Stoessels einer vertikalen Schmiedepresse
US3726123A (en) * 1970-09-30 1973-04-10 Hasenclever Gmbh Maschf Forging press with adjustable working gap

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4069697A (en) * 1976-11-10 1978-01-24 Kasel Steel Corporation Automatic counterbalance control circuit
US4860571A (en) * 1986-09-26 1989-08-29 Kenneth L. Smedberg Power press with improved cushioning system
US4825681A (en) * 1987-01-22 1989-05-02 Kenneth L. Smedberg Pneumatic press counterbalance and cushion construction
US4819474A (en) * 1987-02-19 1989-04-11 Eumuco Aktiengesellschaft Fur Maschinenbau Metal forming machine having a stroke position adjusting assembly
US5000021A (en) * 1988-09-12 1991-03-19 Kurimoto Ltd. Load control device for use in automatic forging press
US5009091A (en) * 1989-03-31 1991-04-23 Hinterman William H Press counterbalance system
WO1992004144A1 (en) * 1990-09-05 1992-03-19 Hinterman William H Press counterbalance system
CN1035221C (zh) * 1993-04-26 1997-06-18 惠特克公司 压头驱动装置
US5666838A (en) * 1995-06-05 1997-09-16 Efco, Incorporated Forging press for use with automated multi-station transport system
US6164147A (en) * 1999-02-05 2000-12-26 The Minster Machine Company Adjustable link motion press
US6311612B1 (en) 1999-07-12 2001-11-06 The Minster Machine Company Link adjustment member
US6606941B2 (en) 1999-07-12 2003-08-19 Minster Machine Company, The Method of altering the drive mechanism of a mechanical press

Also Published As

Publication number Publication date
JPS4952751A (ja) 1974-05-22
GB1431494A (en) 1976-04-07
DE2231579C3 (de) 1981-10-01
DE2231579B2 (de) 1974-04-11
FR2190546B1 (ja) 1979-03-30
FR2190546A1 (ja) 1974-02-01
IT989463B (it) 1975-05-20
JPS5516739B2 (ja) 1980-05-06
DE2231579A1 (de) 1974-01-10

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