US3891260A - Tongs for use in a multi-stage forging press - Google Patents

Tongs for use in a multi-stage forging press Download PDF

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Publication number
US3891260A
US3891260A US364479A US36447973A US3891260A US 3891260 A US3891260 A US 3891260A US 364479 A US364479 A US 364479A US 36447973 A US36447973 A US 36447973A US 3891260 A US3891260 A US 3891260A
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US
United States
Prior art keywords
tongs
forging
lever
press
collar
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
US364479A
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English (en)
Inventor
Hans Kuhn
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.)
F B HATEBUR AG
Original Assignee
F B HATEBUR 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 F B HATEBUR AG filed Critical F B HATEBUR AG
Application granted granted Critical
Publication of US3891260A publication Critical patent/US3891260A/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
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K27/00—Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
    • B21K27/02—Feeding devices for rods, wire, or strips
    • B21K27/04—Feeding devices for rods, wire, or strips allowing successive working steps
    • 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
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/60—Biased catch or latch
    • Y10T403/602—Biased catch or latch by separate spring

Definitions

  • ABSTRACT This invention relates to tongs for use in a multi-stage forging press in which a forging having a collar projecting at right angles to the axis of the press and which is downstream relative to the direction of ejection from the press is to be automatically transported by the tongs.
  • the present invention provides an arrangement for protecting the collar of the forging dur ing transportation thereof 6 Claims, 5 Drawing Figures I TONGS FOR USE IN A MULTI-STAGE FORGING PRESS BACKGROUND OF THE INVENTION
  • the present invention relates to tongs for use in a multi-stage forging press.
  • tongs for use in a press in which a forging having a collar projecting at right angles to the axis of the press and downstream relative to the direction of ejection is automatically transported by at least three co-operating tong jaws which grip a forging issuing from the press die and convey it to the next press station. At least one jaw of the tongs is under elastic pre-strcss for reliable gripping of the forging.
  • tongs for use in a multi-stage forging press in which.
  • a forging having a collar projecting at right angles to the axis of the press and which is downstream relative to the direction of ejection from the press is to be auto matically transported by the tongs.
  • the tongs comprise at least the three cooperating tong jaws for gripping and transporting a forging ejected from the press.
  • Each tong jaw includes a lever on its end face which grips a forging.
  • the lever has first and second arms arranged at an angle to each other and is pivotable between an open position and a gripping position about an axis at right angles to the direction of ejection.
  • the lever is effective to pivot to the gripping position when the arm remote from the press is contacted by the forging being transported.
  • the position of the pivotal axis and the-dimensions of the lever are such that the arm remote from the press is adapted to engage the circumference of the collar when the lever is in its operative gripping position while the arm nearest the press engages a surface of the forging behind the collar.
  • the angle-lever is carried in a slit located on the end face of the jaw of the tongs and possesses. on its side which faces the bottom of the slit, two stop faces which are arranged at an angle to one another.
  • One of the stop faces on the side of the die rests against the bottom of the slit in the position of the tongs prior to gripping and the other of the stop faces rests against the bottom of the said slit in the gripping position of the tongs.
  • the arm of the angle-lever on the side of the die possesses a gripping face which is parallel to the gripping face of the other arm, and both gripping faces can be matched to the circumference of the forging.
  • FIG. 4 is a representation in section similar to FIG.
  • FIG. 5 is a section along line V-Y in FIG.
  • FIG. 1 shows a forging l in its entirety. which can be used, for example, as a vehicle hub and possesses a cylindrical base body 2 and a collar 3 projecting radially outwards theerefrom.
  • the collar 3 is on the end section of the forging l which faces away from the die. as is shown for instance in FIGS. 12 and 4.
  • FIG. I shows the tongs in their gripping position corresponding to a side view in the direction of the arrow l in FIG. 4.
  • the two lower jaws 4 are rigidly fixed to a gripping member 24.
  • the upper pair of jaws is elastically pre-tensioned via arms 25 which cross in a scissors-like manner and via a spiral spring which is not shown.
  • the jaw 4 of the tongs has a substantially parallel epipoidshaped base member 5 provided with a slit 6 which is open towards the bottom and a through-bore 7 which opens into this slit.
  • a slot 30 serves to attach the jaw of the tongs in an adjustable manner to the corresponding arm of the tongs.
  • An angle-lever 8 is carried in a pivotal manner in the slit 6, by means of an axle 27.
  • the axle 27 is provided with a head 27a and is securedon the side opposite the head 27aby means;of a washer 9 and a split pin 10.
  • a cylindrical pin 11 which can slide axially is located in the through-bore 7.
  • a spiralspring 12 is supported, on the side opposite the pin.. 1 1,, on a heavy tensioning pin 13. Accordingly, spring 12 constantly holds the cylindrical pin 11 in contact with the face of the anglelever 8 which points toward it and thereby presses the angle-lever 8 into the position shown in FIG. 2.
  • the face of the angle-lever 8 which points towards the bottom 6a of the slit 6 possesses two stop faces 14 and 15 located at an angle to one another.
  • the side of the angle-lever 8 opposite the faces 14 and 15 has a cut-out portion which in cross-section is practically rectangular. consequently, a projection 16 is produced at the left-hand lower end of the angle-lever.
  • Projection 16 has two faces 17 and 18 which are at an angle to one another.
  • FIG. 2 shows the jaw 4 of the tongs in an open position prior to gripping, in which the tongs thus stand in front of the die and await the ejection of the forging.
  • the position of the axle 27 and the dimensions of the angle-lever 8 are so chosen that in this open position priorto-gripping,"according toFIG. 2, the face 18 is flush with the' lower edge (not numbered) of the jaws of the tongs and righthand"lower corner 19 of the angle-lever pioj'ects beyond 'thelower edge of the jaw 4.
  • the stop face 15 rests against the bottom of theslit 6.
  • the maximum height of pivoting, marked s in FIG. 4, of the projection 16 thus corresponds to the height b of the collar of theforging.
  • the jaw 4 of the tongs is in its gripping position, which is illustrated in FIG. 4. In this gripping position the forging l is thus held by each angle-lever 8 both on the circumference of the collar and on the circumference of the base body 2 and an undesired shift of the forging thereby reliably excluded.
  • the pivoting height s must correspond at least to the height I; of the collar so that the collar 3 can pass freely under the projection 16 of the angle-lever when the-forging ispushed out of the die.
  • the faces 15 and 18 o n..the one hand, and the faces 14,17 and 22 on the other, are respectively parallel to one another in this specific embodiment.
  • the two stop faces 17 and 22 of the angle-lever can be matched to the doming or curvature of the corresponding circumferential faces of the forging l.
  • the bore 7 which serves as a bearing for the pin 12 could for example also (as is indicated in FIG. 4) be constructed as a blind bore.
  • the heavy tensioning pin 13 is then of course no longer necessary.
  • a forging having a collar projecting at right angles to the axis of the press and which is downstream relative to the direction of the ejection from the press is to be automatically transported by tongs, said tongs comprising:
  • each tong jaw including a lever pivotably mounted at the jaw end face where the forging is gripped
  • said lever being pivotablebetween an open position and a gripping positionabout-an axis at right angles to said direction of ejection.
  • the position of the pivotal axis-and the dimensions of the lever being effective to cause the arm remote from the press to engage;the-circumference of the collar and to cause the arm nearest the collar to engage a surface of the forging behind the collar.
  • Tongs as defined in claim 1- wherein there are at least three cooperating :tong jaws.
  • each of the arms includes a gripping surface
  • I each lever is carried in a slit located on the-end of each associated jaw, each said lever being provided with line stops arranged at an angle with respect to each other so that one stop engages thebottom of the slit in an open position of the tongs and the other stop engages the bottom of the slit in the gripping position of the tongs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Manipulator (AREA)
US364479A 1972-05-27 1973-05-29 Tongs for use in a multi-stage forging press Expired - Lifetime US3891260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2225878 1972-05-27

Publications (1)

Publication Number Publication Date
US3891260A true US3891260A (en) 1975-06-24

Family

ID=5846062

Family Applications (1)

Application Number Title Priority Date Filing Date
US364479A Expired - Lifetime US3891260A (en) 1972-05-27 1973-05-29 Tongs for use in a multi-stage forging press

Country Status (11)

Country Link
US (1) US3891260A (xx)
JP (1) JPS5330385B2 (xx)
AT (1) AT323517B (xx)
BE (1) BE800010A (xx)
CH (1) CH566179A5 (xx)
DE (1) DE2225878C2 (xx)
FR (1) FR2189144B1 (xx)
GB (1) GB1427814A (xx)
IT (1) IT985967B (xx)
NL (1) NL153451B (xx)
SE (1) SE386093B (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193792A (en) * 1992-02-10 1993-03-16 Joel Di Marco Soft jaw attachment system for a vise
CN102151760A (zh) * 2011-01-05 2011-08-17 宁波光华电池有限公司 一种多工位连续拉伸模的过渡工位机构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020100149B4 (de) * 2020-01-07 2021-09-16 Frauenthal Powertrain Gmbh Manipulationsvorrichtung zum Handhaben eines durch ein Umformwerkzeug umzuformenden Werkstücks sowie Verfahren

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101140A (en) * 1935-03-23 1937-12-07 Raymond W Hege Automatic injecting syringe device
US3669427A (en) * 1970-07-13 1972-06-13 Gerald J Curtis Golf ball retriever
US3767063A (en) * 1971-06-23 1973-10-23 Chicago Rawhide Mfg Co Apparatus for removing parts from molding cavities

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2101140A (en) * 1935-03-23 1937-12-07 Raymond W Hege Automatic injecting syringe device
US3669427A (en) * 1970-07-13 1972-06-13 Gerald J Curtis Golf ball retriever
US3767063A (en) * 1971-06-23 1973-10-23 Chicago Rawhide Mfg Co Apparatus for removing parts from molding cavities

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5193792A (en) * 1992-02-10 1993-03-16 Joel Di Marco Soft jaw attachment system for a vise
CN102151760A (zh) * 2011-01-05 2011-08-17 宁波光华电池有限公司 一种多工位连续拉伸模的过渡工位机构
CN102151760B (zh) * 2011-01-05 2013-01-09 宁波光华电池有限公司 一种多工位连续拉伸模的过渡工位机构

Also Published As

Publication number Publication date
GB1427814A (en) 1976-03-10
AT323517B (de) 1975-07-10
FR2189144A1 (xx) 1974-01-25
CH566179A5 (xx) 1975-09-15
NL7307198A (xx) 1973-11-29
FR2189144B1 (xx) 1976-05-28
IT985967B (it) 1974-12-30
JPS4951150A (xx) 1974-05-17
DE2225878B1 (de) 1973-10-11
NL153451B (nl) 1977-06-15
SE386093B (sv) 1976-08-02
BE800010A (fr) 1973-09-17
DE2225878C2 (de) 1974-05-09
JPS5330385B2 (xx) 1978-08-26

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