US3521475A - Forging press - Google Patents

Forging press Download PDF

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Publication number
US3521475A
US3521475A US713377A US3521475DA US3521475A US 3521475 A US3521475 A US 3521475A US 713377 A US713377 A US 713377A US 3521475D A US3521475D A US 3521475DA US 3521475 A US3521475 A US 3521475A
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US
United States
Prior art keywords
axis
eccentric
press
forging
shaft
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
US713377A
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English (en)
Inventor
Werner Bothe
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.)
Maschinenfabrik Hasenclever AG
Original Assignee
Maschinenfabrik Hasenclever 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 Maschinenfabrik Hasenclever AG filed Critical Maschinenfabrik Hasenclever AG
Application granted granted Critical
Publication of US3521475A publication Critical patent/US3521475A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks

Definitions

  • a forging press having a press frame and a flywheel eccentric shaft rotatable in the frame about a horizontal axis and having an eccentric portion surrounded by an eccentric ring swivelably connected to the forging head by a pressure-transmitting member which is seated in an upwardly concave socket of the forging head and has a center of curvature located within the inner periphery of the ring; the ring has an upper surface slidably bearing upon a portion of the forging slide, this portion having a center of curvature coinciding with the center of curvature of the swivel member.
  • My present invention resides in a forging press having a support frame, a workpiece-supporting anvil, and a vertically shiftable head which is displaced by an eccentric shaft carrying a flywheel.
  • Forging presses which make use of an upstanding support frame or stand in which an eccentric shaft or crankshaft is journaled generally provide guide means for a vertically shiftable press slide carrying, at its lower end, the forging head of the press and rods or the like connecting the eccentric portion of the shaft to change the rotary motion of the shaft to linear motion of the slide toward and away from the anvil.
  • the rods, pins and link members provided for this purpose must withstand considerable dynamic and static stress, vibration and shock and often are a weak point in the press construction.
  • the rods also may be of considerable length and thus have the tendency to bulk or otherwise deform. Consequently, forging presses of this character require frequent repair, expensive and highly skilled maintenance and are of relatively expensive construction.
  • Still another object of this invention is to provide a force-transmitting system for a forging press or the like which transfers a maximum force or energy with a minimum of danger of'breakdown or damage.
  • This swivel body preferably has a downwardly convex portion of substantially cylindrical curvature which is received in an upwardly open trough or socket formed in the forging head complementarily to the cylindrical curvature of the swivel body.
  • the mutually engaging surfaces of the socket and this body are centered upon the swivel axis which, advantageously, lies within the outer periphery of the cylindrical eccentric but is spaced from the axis of rotation of the shaft by a distance greater than that with which the axis of the cylindrical eccentric portion is distant therefrom.
  • the pressure-transmitting body thus may be constituted as a partial or semicylinder although spherical or hemispherical shapes are also possible.
  • I Diametrically opposite the pressure-transmitting member, which is affixed directly to the eccentric ring and constitutes part thereof as indicated earlier, I provide a segmental abutment whose outer surface is also centered on the axis of the swivel body and may engage a complementary portion of the press slide dovetailed in a traverse above the eccentric shaft. The slide surfaces are likewise centered on the swivel axis.
  • This system has the advantage that all pressure-transmitting rods, toggle levers and the like can be avoided and that force is transmitted with a maximum of directness from the shaft to the workpiece. In addition, minimum force is required to lift the slide from the workpiece during the return stroke and the forces applied to the traverse upon which the eccentric acts in the return stroke are relatively small.
  • FIG. 1 is a vertical elevational view, partly in axial cross-section, of a forging press in accordance with the present invention
  • FIG. 2 is a cross-sectional view along the line II-II of FIG. 1;
  • FIG. 3 is a cross-sectional view of a portion of the device of FIG. 2 showing the pressure-transmitting member in another position;
  • FIG. 4 is a cross-sectional view along the line IVIV of FIG. 1.
  • a forging press which comprises a press stand or frame 1 whose posts or legs 1a, 1b, etc. are held together by a solid crosspiece 1c and define guides in a conventional manner for the vertically shiftable press slide 3 which has a forging head 3a adapted to be advanced toward an anvil 2 and withdrawn there from during the press stroke.
  • a workpiece may be inserted between the head 3 and the anvil 2 for forging action.
  • the drive for the slide 3 comprises an eccentric shaft 4 whose axis of rotation in the support 1 is represented at arrow A and which is driven by conventional means (e.g. a unirotational belt and pulley system, etc.) and is provided with a flywheel 16.
  • Means .for adjusting the throw of the crankshaft is constituted by the gears 17 and the control member 18 which function as described in my commonly assigned copending application (now abandoned) Ser. No. 713,376 filed concurrently herewith and entitled Forging Press With Adjusting Means.
  • the shaft 4 passes through the slide which is formed with a traverse across its top.
  • the eccentric shaft is provided with an eccentric 5 whose cylindrical surface 5a is centered on the axis B offset radially from the axis A.
  • the eccentric is surrounded by a ring 6 forming part of a force-transmitting swivel 6-8 which includes a solid body 7 of crescentshaped cross-section.
  • This body 7, which is welded to the balance of the ring 6, has an inner surface 7a corresponding to the outer cylindrical surface 5a and completes the ring 6.
  • the body 7 constitutes the sole forcetransmitting member between the eccentric 5 and the head 3a which is formed with an upwardly concave socket 19 in which the convex portion 8 of the body '7 is received.
  • portion '8 and socket 19 are generally cylindrical and are centered upon the axis 13 which constitutes the swivel axis of the device and is spaced from the axis A by a distance greater than the distance of axis B therefrom.
  • ring 6 is provided with an abutment 9 of generally sectoral configuration whose surface 11 is complementary to the surface 12 of a slide dovetailed in the traverse 10.
  • Surfaces 11 and 12 are also centered upon the swivel axis 13.
  • a forging press comprising an upright support, an anvil, a press slide vertically shiftable on said support toward and away from said anvil, said slide being formed with a forging head engageable with a workpiece disposed on said anvil, a shaft journaled on said support for rotation about an axis of said shaft and carrying a cylindrical eccentric with an axis spaced from the axis of the shaft and describing a circular path upon rotation of the latter, and force-transmitting swivel means engaging said eccentric and connected with said head while including a solid force-transmitting body interposed directly between said eccentric and said head, said forcetransmitting swivel means comprising a ring surrounding said eccentric with said eccentric being rotatable within said ring, said body being affixed to said ring, said ring and said body defining a swivel axis spaced from the axis of said shaft and said eccentric, said body having a convex portion centered on said swivel axis and said head being formed

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Press Drives And Press Lines (AREA)
  • Presses And Accessory Devices Thereof (AREA)
US713377A 1967-03-25 1968-03-15 Forging press Expired - Lifetime US3521475A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0073329 1967-03-25

Publications (1)

Publication Number Publication Date
US3521475A true US3521475A (en) 1970-07-21

Family

ID=7314970

Family Applications (1)

Application Number Title Priority Date Filing Date
US713377A Expired - Lifetime US3521475A (en) 1967-03-25 1968-03-15 Forging press

Country Status (4)

Country Link
US (1) US3521475A (de)
DE (1) DE1627435B2 (de)
FR (1) FR1551769A (de)
GB (1) GB1165292A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726123A (en) * 1970-09-30 1973-04-10 Hasenclever Gmbh Maschf Forging press with adjustable working gap
US3908436A (en) * 1974-05-01 1975-09-30 Hasenclever Gmbh Maschf Power press with overload protection
US3948077A (en) * 1974-03-09 1976-04-06 Maschinenfabrik Hasenclever Gmbh Forging press with independent hammer-position adjustment and overload protector
JP2018534148A (ja) * 2015-11-20 2018-11-22 エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング スライディングブロックを有する機械式プレス機械

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015222995A1 (de) 2015-11-20 2017-05-24 Sms Group Gmbh Weggebundene Presse mit Kulissenstein

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US999276A (en) * 1909-02-11 1911-08-01 George G Thorp Apparatus for forging axles and similar articles.
US1295189A (en) * 1918-02-25 1919-02-25 William Henry Morgan Forging, flanging, and other press.
US2232889A (en) * 1938-12-23 1941-02-25 Spencer Frank William High-speed forging press
US2256908A (en) * 1940-04-02 1941-09-23 Rafter Machine Company Machine for bending sheet metal shapes
US2633094A (en) * 1948-12-02 1953-03-31 Bliss E W Co Power-operated press device
US3064559A (en) * 1959-11-19 1962-11-20 Ross B Treer Press

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US999276A (en) * 1909-02-11 1911-08-01 George G Thorp Apparatus for forging axles and similar articles.
US1295189A (en) * 1918-02-25 1919-02-25 William Henry Morgan Forging, flanging, and other press.
US2232889A (en) * 1938-12-23 1941-02-25 Spencer Frank William High-speed forging press
US2256908A (en) * 1940-04-02 1941-09-23 Rafter Machine Company Machine for bending sheet metal shapes
US2633094A (en) * 1948-12-02 1953-03-31 Bliss E W Co Power-operated press device
US3064559A (en) * 1959-11-19 1962-11-20 Ross B Treer Press

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3726123A (en) * 1970-09-30 1973-04-10 Hasenclever Gmbh Maschf Forging press with adjustable working gap
US3948077A (en) * 1974-03-09 1976-04-06 Maschinenfabrik Hasenclever Gmbh Forging press with independent hammer-position adjustment and overload protector
US3908436A (en) * 1974-05-01 1975-09-30 Hasenclever Gmbh Maschf Power press with overload protection
JP2018534148A (ja) * 2015-11-20 2018-11-22 エス・エム・エス・グループ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング スライディングブロックを有する機械式プレス機械
US11084240B2 (en) * 2015-11-20 2021-08-10 Sms Group Gmbh Path-controlled press having a sliding block
US11186056B2 (en) 2015-11-20 2021-11-30 Sms Group Gmbh Mechanical press with sliding block

Also Published As

Publication number Publication date
GB1165292A (en) 1969-09-24
DE1627435A1 (de) 1970-01-08
FR1551769A (de) 1968-12-27
DE1627435B2 (de) 1971-06-03

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