US3867830A - Forging press - Google Patents

Forging press Download PDF

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Publication number
US3867830A
US3867830A US382616A US38261673A US3867830A US 3867830 A US3867830 A US 3867830A US 382616 A US382616 A US 382616A US 38261673 A US38261673 A US 38261673A US 3867830 A US3867830 A US 3867830A
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US
United States
Prior art keywords
die
recess
forging
punch
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
US382616A
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English (en)
Inventor
Heinz Dettwiler
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
Application granted granted Critical
Publication of US3867830A publication Critical patent/US3867830A/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
    • 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
    • B21J13/025—Dies with parts moving along auxiliary lateral directions

Definitions

  • the present invention relates to a forging press, and more especially to a forging press provided with transport tongs.
  • the tongs can however only be used up to transporting capacities of a maximum of 50 pressings per minute. Since the automatic presses which are customary nowadays work with average outputs of 120 to I50 pressings per minute the use oftongs which work in this way is no longer possible.
  • a forging press equipped with tongs for transporting a forging from the press, the press including a die, and a reciprocable punch adapted to co-operate with the die in'a working zone to produce a forging, the stroke of the punch being such that the punch and die in their operative position in the working zone are spaced apart to provide a gap therebetween which communicates with a recess extending in the direction of the axis of the press such that a peripheral flash of a forging is formed in the gap and recess, the recess being positioned such that the portion of the flash produced therein can be engaged by the tongs.
  • FIG. 1 is a horizontal section of a device for the manufacture of tilting levers
  • FIG. 2 is a plan view of the forging with the flash
  • FIG. 3 is a side view of the matrix with the transverse transport tongs opened
  • FIG. 4 is a side view corresponding to FIG. 3 but shows the arms of the tongs in their pre-gripping position
  • FIG. 5 shows the pressing, provided with the flash, in the grip of the transverse transport tongs
  • FIG. 6 is a cross-sectional representation along line VIVI in FIG. 5;
  • FIG. 7 illustrates the transport of the pressing from the last forming station to the de-flashing station
  • FIG. 8 is a plan view of a pressed elbow before de flashing.
  • FIG. 9 shows a modification of the device.
  • the device shown in the drawing represents a press station of an automatic multi-stage transverse-transport forging press.
  • the blank which is preformed in a known manner in press stations which are not shown is finally formed in the press station shown and is subsequently de-flashed.
  • the device shown in FIG. 1 omitting unimportant details, represents a fixed die 2 and a reciprocating punch 3.
  • the finished shape of the forging in the present case, a shaped lever 1, is preformed partly in the end face of the die 2 and partly in that of the punch 3.
  • the die 2 and the punch 3 are surrounded on the sections which face one another, by a ring 5.
  • Ejector pins 6, 7 and 8 are slidably mounted in the die body, and by means of these the finished pressed article can be pushed out of the die.
  • the punch 3 is the nearest position away from the die and in which the shaping of the forging 1 is finished and the forging can be ejected for transportation onto the deflashing station.
  • the two mutually facing end faces of the die 2 and punch 3 do not touch, as is clearly shown by FIG. 1, but are separated from one another by a gap of height a.
  • this gap is filled with a flash 9 which sourrounds the forging l on all sides, as is shown in particular by FIG. 2.
  • This flash 9 serves to balance the unavoidable difference in the distribution of the material.
  • the circumferential surface of the flash 9 remains at a distance 10 from the inner wall of the ring 5, or can touch the ring in an irregular fashion, depending on the resulting excess material.
  • the flash 9 performs a further very important function: it prevents the end faces of the die 2 and of the punch 3 from striking one another during the pressing process, which would lead to premature wear of the tools and to unacceptable stresses on the machine frame.
  • the flash 9 thus acts as a buffer.
  • the punch 3 is provided with a recess 11 which is wedge-shaped in cross-section and which ends in the gap between the punch and die and is filled with flash material.
  • This recess which in the present embodiment is produced by chamfering the edge of the punch head is defined on the plane outside by the inner wall of the ring 5.
  • four such recesses 11 spaced apart by relative to one another are provided and lead to a situation where the flash 9, during the pressing process, also extends to the recesses 11 and fills these.
  • the flash 9 thus has four projections 12 staggered by 90 relative to one another.
  • the outward-pointing faces 13 (FIG. 2) of the projections 12 are substantially plane. in accordance with the local construction of the inner wall of the ring 5]
  • the forging can be gripped by the tongs on these plane faces 13, the distance of each of which from the press axis P is accurately defined and,
  • the thickness a of the flash 9 is calculated precisely and can also be deduced from the correspondingly restricted stroke of the punch 3.
  • the material of the pressing blank flows and in particular fills the four recesses 11.
  • the circumferential parts 14 of the flash 9 which are located between the projections 12 have a wavy irregular defining surface, since in these zones the material balancing already mentioned takes place.
  • FlG. 3 shows the upper arm 15 and lower arm 16 of the transport tongs in the opened position.
  • the drawing clearly shows the die 2 with the die cavity 17, and the ring which surrounds the die 2 and is provided with four plane faces 18.
  • the upper arms of the tongs move in the direction of the arrow 20 and the lower arms of the tongs 16 move in the direction of the arrow 21 until the holding faces 22 of the tong shoes 23, are in the same plane as the plane faces 18 of the flash 9.
  • the pressing l is released from the die 2 by the ejector pins 6, 7 and 8 (FIG. 1) and pushed into engagement with the tongs (FIG. 4). Due to the provision of the projections 12 provided with the plane faces 13 (FIG. 2) the pressing 1 provided with the flash 9 is now centered perfectly and can be conveyed, by means of the transverse transport tongs, to the deflashing station or a further forming station without the risk of any undesired movement.
  • FIG. 5 shows the forging or pressing l in the grip of the transverse transport tongs.
  • the detailed representation according to FIG. 6 clearly shows the design of the projection 12. against the plane face 13 of which the holding face 22 of the tong shoe 23 rests.
  • FIG. 7 illustrates how the transverse transport tongs convey the pressing or forging in the direction of the arrow 24 from the last forming station to the deflashing station.
  • the deflashing station has a deflashing die 25 in which the flash 9 is severed from the pressing or forging 1.
  • FIG. 8 shows, in plan view, an elbow member 26 provided with a flash 27.
  • the flash 27 projects outwards in both directions in the middle plane of the elbow 26.
  • the two end faces 29 and 30 of the elbow 26 are not provided with a flash portion.
  • the two mutually matching die members of the die and of the punch are so constructed and arranged in the present case, that the two end faces 29 and 30 of the elbow 26 are formed on corresponding plane faces of the ring 5, whilst a projection 28 is merely provided on the point of the flash.
  • this projection 28 corresponds to the projections 12 of the embodiment already described.
  • a single projection 28 suffices for centering the pressing in the tongs since the upper arms of the tongs can without difficulty engage on the accurately positioned plane faces 29 and 30.
  • the lower part of the tongs merely has one tong shoe which rests on the outer face of the projection 28.
  • the recess 11 which serves to form the projection 12 was produced by chamfering the edge of the punch head. ln principle it would also be possible to provide the corresponding recess in the die or in the adjoining inner wall of the ring 5 or both on the periphery of the punch head and in the defining ring or both in the die and on the punch head.
  • the punch and die are surrounded by a ring 5, it is also possible to dispense with this ring by constructing the device, for example, according to FIG. 9.
  • the punch 32 projects into a corresponding blind hole of the die 33 and the two halves of the die are machined in the end face of the punch head and in the bottom of the blind hole.
  • a forging press including tong means for transporting a forging from the press, the invention which comprises a. a die member; and
  • a punch member mounted for axial reciprocation relative to said die member, said punch member being adapted to co-operate with said die-member in a work ing zone to produceaforging :the stroke of said punch member being such that said punch and die members in their operative position in the working zone are spaced apart to provide a gap therebetween so that a peripheral flash of the forging is formed in the gap;
  • a press according to claim 1 in which said punch has a chamfered surface which in part defines said recess.
  • a press according to claim 1 in which the gap completely surrounds the members of the die and punch which produce the forging, the gap further communicating with two pairs of opposed recesses all of which recesses extend in the direction of the axis of the press.
  • a press according to claim 1 which includes a member having a plane surface surrounding the working zone, said plane surface in part defining said recess.
  • a press according to claim 1 which includes a plurality of the said recesses.
  • a press according to claim 1 for producing an elbow shaped forging in which the members of the die and punch which produce the forging are provided with facing end portions which communicate with plane faces of a member surrounding the working zone, the recess being positioned adjacent the apex of the elbow.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
US382616A 1972-08-02 1973-07-25 Forging press Expired - Lifetime US3867830A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2237913A DE2237913A1 (de) 1972-08-02 1972-08-02 Vorrichtung zur massenfabrikation von pressteilen im dauerbetrieb auf mehrstufigen quertransport-schmiedepressen

Publications (1)

Publication Number Publication Date
US3867830A true US3867830A (en) 1975-02-25

Family

ID=5852409

Family Applications (1)

Application Number Title Priority Date Filing Date
US382616A Expired - Lifetime US3867830A (en) 1972-08-02 1973-07-25 Forging press

Country Status (11)

Country Link
US (1) US3867830A (de)
JP (1) JPS4979946A (de)
AT (1) AT323516B (de)
BE (1) BE802699A (de)
CH (1) CH568112A5 (de)
DE (1) DE2237913A1 (de)
FR (1) FR2194502B1 (de)
GB (1) GB1432167A (de)
IT (1) IT991839B (de)
NL (1) NL156942B (de)
SE (1) SE384152B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741197A (en) * 1986-04-25 1988-05-03 Aluminum Company Of America Ejection of superplastically formed part with minimum distortion
WO2012088490A1 (en) * 2010-12-23 2012-06-28 Orchid Orthopedics Solutions, Llc Orthopedic implant and method of making same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110253255B (zh) * 2019-07-05 2024-03-15 浙江联宜电机有限公司 压装用缓冲装置
CN115069956A (zh) * 2022-06-15 2022-09-20 山东南山铝业股份有限公司 一种控制超硬铝合金7050大型框锻件热处理方法及锻件

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603987A (en) * 1942-01-12 1952-07-22 Lyon George Albert Apparatus for making cartridge casing blanks or the like
US2802381A (en) * 1954-05-21 1957-08-13 Budd Co Work handling means for presses
US2851980A (en) * 1953-10-27 1958-09-16 Randall Graphite Bearings Inc Method and apparatus for cold forming spherical tube sections
US3525248A (en) * 1966-11-30 1970-08-25 Kieserling & Albrecht Press
US3713320A (en) * 1971-05-28 1973-01-30 Walker Forge Inc Method of handling metal stock for hot forging

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5120985A (en) * 1974-08-14 1976-02-19 Sumitomo Chemical Co Orefuinno jugohoho

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2603987A (en) * 1942-01-12 1952-07-22 Lyon George Albert Apparatus for making cartridge casing blanks or the like
US2851980A (en) * 1953-10-27 1958-09-16 Randall Graphite Bearings Inc Method and apparatus for cold forming spherical tube sections
US2802381A (en) * 1954-05-21 1957-08-13 Budd Co Work handling means for presses
US3525248A (en) * 1966-11-30 1970-08-25 Kieserling & Albrecht Press
US3713320A (en) * 1971-05-28 1973-01-30 Walker Forge Inc Method of handling metal stock for hot forging

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741197A (en) * 1986-04-25 1988-05-03 Aluminum Company Of America Ejection of superplastically formed part with minimum distortion
WO2012088490A1 (en) * 2010-12-23 2012-06-28 Orchid Orthopedics Solutions, Llc Orthopedic implant and method of making same

Also Published As

Publication number Publication date
SE384152B (sv) 1976-04-26
AT323516B (de) 1975-07-10
CH568112A5 (de) 1975-10-31
NL156942B (nl) 1978-06-15
JPS4979946A (de) 1974-08-01
NL7310643A (de) 1974-02-05
DE2237913A1 (de) 1974-02-14
FR2194502A1 (de) 1974-03-01
BE802699A (fr) 1973-11-16
FR2194502B1 (de) 1978-12-29
IT991839B (it) 1975-08-30
GB1432167A (en) 1976-04-14

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