US3670557A - Ring-forging press - Google Patents

Ring-forging press Download PDF

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Publication number
US3670557A
US3670557A US29504A US3670557DA US3670557A US 3670557 A US3670557 A US 3670557A US 29504 A US29504 A US 29504A US 3670557D A US3670557D A US 3670557DA US 3670557 A US3670557 A US 3670557A
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United States
Prior art keywords
ring
mandrel
forging
ram
press
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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
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US29504A
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English (en)
Inventor
Willy Muller
Helmut Robra
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Schloemann AG
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Schloemann AG
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Filing date
Publication date
Application filed by Schloemann AG filed Critical Schloemann AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B21K1/761—Making machine elements elements not mentioned in one of the preceding groups rings
    • 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

Definitions

  • a secondary mandrel, the diameter of which is smaller than that of the main mandrel, may be included for the manipulation of rings with initially relatively small holes.
  • This invention relates to a ring-forging press, provided with a device for the intermittent displacement of the ring between the forging ram and the mandrel.
  • the ring After each widening forging stroke the ring must be turned from time to time through a definite angle of its periphery upon the mandrel.
  • a known device for the intennittent rotating of the ring to be forged upon the mandrel consists in the feature that the ring hangs above a mandrel, which is supported upon pedestals in the forging direction and is turned by a manipulator. After each forging stroke, the manipulator turns the mandrel through a definite angle, and in this way transports the ring stepwise in a tangentialdirection.
  • the problem of the invention was therefore to transport the up-set and pre-pierced block section in a simple manner, without complicated transport manipulations, to the forging press, and to forge it in only one working position, that is to say, without supplementary transport and without turning, and as far as possible with a single heating-up operation, to a ring of any desired size, while the ring is to be tumable intermittently in the press in a simple manner between the individual strokes.
  • the invention therefore provides a ring-forging press, comprising a vertically arranged main mandrel, a forging ram horizontally movable relatively to the mandrel, a device for intermittently displacing the ring to be forged between the forging ram and the mandrel, a C-shaped frame open at the top connecting the forging ram and the mandrel, an underlying bearing surface located horizontally around the mandrel for supporting the ring to be forged, and a device, operable when the forging ram is retracted from the mandrel, for horizontally and rectilinearly displacing the ring at an acute angle to and in the opposite sense of the forging stroke of the forging ram and for simultaneously moving the internal surface of the ring away from the mandrel.
  • the mandrel can be lowered vertically, and continuously (steplessly) adjusted, and upon its upper end is eccentrically arranged a mandrel the diameter of which is less than that of the main mandrel, in
  • the forging press has the C-shaped frame open at the top, there is no limit, when forging the block by widening it to a ring, to the size of the ring, from the dimensions of the machine; for the ring lies flat upon a working surface, and can be widened to any desired size, without being hampered by columns and/or an under beam, as is the case with vertically acting forging presses.
  • the ring By means of the device according to the invention for displacing the rings on the contact surface at an acute angle to the direction of forging, with theforging ram retracted, the ring can advantageously be moved away from the mandrel, with its inner annular surface, in optional stages. The magnitude of the stages will be judged according to what forging step the ring is to be moved through each time. In consequence of the displacement of the ring, the center of the ring moves obliquely out of the forging axis. The forging ram thereupon pushes the ring back against the mandrel in the direction of pressing.
  • the ring upon further advance of the forging ram, is rocked in again with its center point into the forging axis, and is thus shifted further at the same time tangentially by one forging step with its periphery on the mandrel.
  • the smaller mandrel member eccentrically arranged upon the main mandrel serves advantageously to forge and widen block sections pierced upon the punching press, firstly until the increasing internal diameter of the ring permits forging over the main mandrel. For this purpose, the mandrel will travel upwards correspondingly to the thickness of the ring.
  • the contact surface for the ring is constructed as an oscillatingly displaceable ring support, wherein, for smaller ring dimensions, removable tappet members are arranged upon the contact surface at the level of the smaller mandrel member. In this way, a separate displacement device is no longer required.
  • a construction of displacement beam as a ring support is also conceivable, wherein the beam or beams may advantageously be so constructed as to be capable of being raised during the forward stroke and of being lowered below the ring-contact surface during the retraction stroke.
  • another arrangement for the transport of the ring consists in the feature that as a ring-displacing device a push member is provided, which acts upon the periphery of the ring and reciprocates it horizontally.
  • a push member which acts upon the periphery of the ring and reciprocates it horizontally.
  • the push member there may advantageously act as the push member, a beam arranged above the ring contact surface with its axis perpendicular to the direction of displacement, co-operating with a power implement arranged in the direction of displacement.
  • the power implement provided is preferably a hydraulically actuated piston-and cylinder unit, which can travel in a horizontal guide at an acute angle to the ring-displacing device and can be arrested in this guide.
  • the advantage of this arrangement resides in the fact that the ringtdisplacing device lies above the ring-contact surface, and always displaces the ring by pushing it on the basis of the piston-and-cylinder unit movable at an acute angle to the direction of ring displacement, in the piston-and-cylinder axis, irrespectively of what particular diameter the ring may have as a result of the forging. There is therefore, no eccentric action of force in the piston-and-cylinder unit.
  • a ring-forging device for the all-round forging of rings in only one working position is further characterized by a forging press of the horizontally working kind, and a vertically acting ring-flattening device immediately following in the direction of rotation of the ring.
  • the ring-flattening device advantageously consists of a cylinder, arranged between a laterally open C-shaped frame with upper and lower arms, with a forging ram and an upper saddle constituting the upper arm, and with a lower saddle constituting the lower arm, the forging surface of the lower saddle being arranged at the level of the contact surface for the ring.
  • a ring can be forged with a single heating, including both widening in a radial direction and flattening in an axial direction, without special transport manipulations being thereby rendered necessary.
  • the forging sequences of the two forging presses arranged in series are advantageously altemating, so that from time to time only one ram of the two presses is in pressing contact with the ring.
  • a horizontally acting forging press 1 is erected in a foundation pit 2, and consists of a C-shaped frame 3 (FIG. 1) open at the top. On one limb of the frame 3 is arranged a cylinder 4 having a piston 5 and a piston-rod 6 provided with a forging ram 7 acting horizontally. The pressure-liquid connections to the cylinder 4 are marked 8 and 9. On the other limb is movably guided vertically a mandrel 10. The displacing is effected by means of a hydraulic power implement 11, which is connected with the frame 3 by way of an arm 12.
  • the power implement 11 consists of a cylinder 13 secured to the arm 12, and a piston 14 guided in this cylinder, with a piston-rod 15.
  • the pressure-liquid connections to the cylinder 13 are marked 16 and 17.
  • the frame 3 rests with one side upon a girder 18.
  • the mandrel carries, upon its upper end face a mandrel member 19 of smaller diameter, which is eccentrically arranged in such a way that its side facing the forging ram 7 is flush with the side of the mandrel 10.
  • a ring 20 lies flat upon an underlying support 21 between the forging ram 7 and the mandrel 10.
  • the smaller mandrel member 19 serves for rings which, before the first forging, have only a comparatively small aperture, produced on a punching press. For the forging of these block sections, the mandrel 10 is lowered into the position shown in dot-and-dash lines in FIG. 1.
  • a ring-displacing device working at an acute angle to the direction of forging effects the intermittent transporting of the ring 20, the inside of the ring moving away from the mandrel 10 at times, in a direction opposite to the forging direction, through the length of the stroke multiplied by the sine of the angle ,8 (see FIG. 2).
  • FIGS. 3a-3d The mode of action of the interplay of the ring displacement and the movement of the forging ram, whereby ultimately the intermittent rotational advance of the ring 20 is efi'ected, is illustrated by FIGS. 3a-3d:
  • the ring 20 is located between the forging ram 7 and the mandrel 10, with the forging ram having just executed a forging stroke at the position on the ring 20 which is marked X
  • the forging ram 7 is retracted, and a displacing device has rectilinearly and horizontally displaced the ring through an acute angle a to the forging axis in the direction of the arrow and in the opposite sense to the direction of forging.
  • the marking X now lies outside and parallel to the forging axis, and the internal surface of the ring has been moved away from the mandrel.
  • the forging ram 7 has engaged the ring 20 on the periphery, in this case at the marking X, and has advanced it so far that the inside of the ring just touches the mandrel 10.
  • the points of contact of the forging ram with the outside of the ring and of the mandrel with the inside of the ring now lie to the right and left of the forging axis.
  • the ring owing to the points of contact being spaced apart, is turned with its center point Y into the forging axis by a torque exerted upon the ring 20.
  • FIG. 4 a ring-displacing device in which a ring support may at the same time be displaced obliquely to theforging axis.
  • the ring 20 rests upon the underlying support 21, which is partially provided with a slot 22 of the thickness of the mandrel 10, and, in the retracted position is spaced away, with its edge 23 from the mandrel 10, by at least the amount of the stroke to be advanced.
  • the forging ram 7 advances and rotates the ring 20 in the manner previously described.
  • the displacing of the support 21 may, in this case, be effected by a power appliance 24.
  • detachable tappets or drivers 25 for instance a beam arranged on abutments, are provided on the support 21.
  • FIG. 5 Another displacing device, constructed as a horizontally movable push member, is shown by FIG. 5.
  • a power appliance 26 is provided, consisting of a cylinder 27, a piston 28 and a piston-rod 29.
  • This appliance with a beam 30 secured to the piston rod 29 transversely to the direction of displacement, displaces the ring 20 lying upon a stationary support, by bearing against the periphery thereof.
  • the ring-flattening device 32 consists of a C-shaped frame, standing vertically, open towards the ring 20, the forging surface of the lower saddle, which fomis the lower arm of the frame being located at the level of the ring support.
  • the upper saddle is secured to the forging ram, and forms the upper arm of the frame. These two arms are made so wide that they can engage, for flattening, rings of all sizes.
  • a ring-forging press comprising: a vertically arranged main mandrel, a forging ram horizontally movable relatively to the said mandrel, a device for intermittently displacing the ring to be forged between the forging ram and the mandrel, a C-shaped frame open at the top connecting the forging ram with the mandrel, and underlying bearing surface located horizontally around the mandrel for supporting the ring to be forged, and a device, operable when the forging ram is retracted from the mandrel, for horizontally and rectilinearly displacing the ring at an acute angle to and in the opposite sense to the direction of the forging stroke of the forging ram, and for simultaneously moving the internal surface of the ring away from the mandrel.
  • a ring-forging press comprising: a vertically arranged main mandrel, a forging ram horizontally movable relatively to the mandrel, a device for intermittently displacing the ring to be forged between the forging ram and the mandrel, a C- shaped frame open at the top connecting the forging ram with the mandrel, an underlying bearing surface located horizontally around the mandrel for supporting the ring to be forged, a device for horizontally displacing the ring, when the forging ram is retracted from the mandrel, at an acute angle to the direction of forging, and for simultaneously moving the internal surface of the ring away from the mandrel, means for lowering vertically and continuously adjusting the main mandrel, a secondary mandrel, smaller than said main mandrel, standing upon the upper end face of the main mandrel, the sides of the main and secondary mandrels that face the forging ram being flush with one another, the
  • a ring-forging press comprising: a vertically arranged main mandrel, a forging ram horizontally movable relatively to the mandrel, a device for intermittently displacing the ring to be forged between the forging ram and the mandrel, a C- shaped frame open at the top connecting the forging ram with the mandrel, an underlying bearing surface located horizontally around the mandrel for supporting the ring to be forged, a device for horizontally displacing the ring, when the forging ram is retracted from the mandrel, at an acute angle to the direction of forging, and for simultaneously moving the internal surface of the ring away from the mandrel, the ring-displacing device being a push member, movable to and fro horizontally, and engaging the periphery of the ring.
  • the ring-forging press as claimed in claim 4 the push member being a beam arranged above the ring-supporting surface with its axis perpendicular to the direction of ring displacement, and the press further comprising a power appliance for impelling the beam and the push member in the direction of displacement.
  • Ring-forging means for the all-round forging of rings in only one working position comprising: a forging press as claimed in claim 1 and a vertically acting ring-flattening device immediately following the horizontally working forging press in the direction of rotation of the ring.
  • Ring-forging means as claimed in claim 7, the ring-flattening device comprising a laterally open C-shaped frame formed with upper and lower arms, the forging ram and the upper saddle of the press constituting the upper arm of the C- shaped frame and the lower saddle of the press constituting the lower arm, and the forging surface of the lower saddle being at the level of the underlying bearing surface for the ring.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US29504A 1969-04-19 1970-04-17 Ring-forging press Expired - Lifetime US3670557A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691919939 DE1919939A1 (de) 1969-04-19 1969-04-19 Ringschmiedepresse

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US3670557A true US3670557A (en) 1972-06-20

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US (1) US3670557A (enrdf_load_stackoverflow)
DE (1) DE1919939A1 (enrdf_load_stackoverflow)
FR (1) FR2039304B1 (enrdf_load_stackoverflow)
GB (1) GB1265603A (enrdf_load_stackoverflow)
SE (1) SE363050B (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4378688A (en) * 1981-03-12 1983-04-05 Gulf & Western Manufacturing Company Apparatus for feeding and orienting workpieces in a press
CN104985052B (zh) * 2015-07-23 2017-01-11 深圳市安盛首饰有限公司 环形金属件的整形设备及其方法
CN109967681B (zh) * 2019-04-01 2024-03-19 江阴市劲松科技有限公司 一种锻造设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1685322A (en) * 1926-09-02 1928-09-25 Scott Frank Apparatus for forging or forming metal articles
DE965281C (de) * 1954-07-15 1957-06-06 Leuna Werke Veb Hilfsvorrichtung zum Schmieden groesserer Ringe od. dgl. auf einer Schmiedepresse
US3229493A (en) * 1962-01-30 1966-01-18 Baldwin Lima Hamilton Corp Method for rough forging annular workpieces
US3379047A (en) * 1965-01-20 1968-04-23 Kralowetz Bruno Forging process and machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1031672A (en) * 1961-05-18 1966-06-02 Woodhouse & Rixson Ltd Improvements in or relating to machines for forging metal rings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1685322A (en) * 1926-09-02 1928-09-25 Scott Frank Apparatus for forging or forming metal articles
DE965281C (de) * 1954-07-15 1957-06-06 Leuna Werke Veb Hilfsvorrichtung zum Schmieden groesserer Ringe od. dgl. auf einer Schmiedepresse
US3229493A (en) * 1962-01-30 1966-01-18 Baldwin Lima Hamilton Corp Method for rough forging annular workpieces
US3379047A (en) * 1965-01-20 1968-04-23 Kralowetz Bruno Forging process and machine

Also Published As

Publication number Publication date
SE363050B (enrdf_load_stackoverflow) 1974-01-07
DE1919939A1 (de) 1970-11-05
FR2039304B1 (enrdf_load_stackoverflow) 1974-09-20
FR2039304A1 (enrdf_load_stackoverflow) 1971-01-15
GB1265603A (enrdf_load_stackoverflow) 1972-03-01

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