JPS5659556A - Forging method of parts having undercut - Google Patents

Forging method of parts having undercut

Info

Publication number
JPS5659556A
JPS5659556A JP13361179A JP13361179A JPS5659556A JP S5659556 A JPS5659556 A JP S5659556A JP 13361179 A JP13361179 A JP 13361179A JP 13361179 A JP13361179 A JP 13361179A JP S5659556 A JPS5659556 A JP S5659556A
Authority
JP
Japan
Prior art keywords
recess
cam piece
inside surface
predetermined shape
punch
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.)
Granted
Application number
JP13361179A
Other languages
Japanese (ja)
Other versions
JPS5852729B2 (en
Inventor
Yoshito Murata
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.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP54133611A priority Critical patent/JPS5852729B2/en
Publication of JPS5659556A publication Critical patent/JPS5659556A/en
Publication of JPS5852729B2 publication Critical patent/JPS5852729B2/en
Expired legal-status Critical Current

Links

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
    • B21K1/00—Making machine elements
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B21K1/762—Coupling members for conveying mechanical motion, e.g. universal joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • 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
    • 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
    • B21K1/762—Coupling members for conveying mechanical motion, e.g. universal joints
    • B21K1/765—Outer elements of coupling members

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)

Abstract

PURPOSE:To expand and contract the split end parts of a cam piece and forge the same to an undercut part of a predetermined shape by the impact thereof by making a half-finished product having a recess smaller than a predetermined shape, making the cam piece face the recess then vertically moving the punch of the inside surface. CONSTITUTION:A semi-finished product 1 provided with a recess 8 having an inside surface 7 which is smaller than a predetermined shape and is approximately staight is put into the recess 12 of a die 11. A cam piece 26 having an outside surface 30 of approximately the same shape as that of the spherical inside surface of the product is inserted into the recess 8. A punch 17 is lowered by lowering a press slide 16, and the cam piece 26 is expanded outward by the downward truncated hexagonal cone face 25 of the end part 17a thereof so that the outside surface 30 thereof makes press-contact with the inside surface 7 of the semifinished product. In this way, the outside surface 30 of the cam piece 26 is expanded and contracted by the vertical movement of the punch 17, and the inside surface 7 of the semifinished product is forged to the undercut of a predetermined shape.
JP54133611A 1979-10-18 1979-10-18 Method for forging parts with undercuts Expired JPS5852729B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54133611A JPS5852729B2 (en) 1979-10-18 1979-10-18 Method for forging parts with undercuts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54133611A JPS5852729B2 (en) 1979-10-18 1979-10-18 Method for forging parts with undercuts

Publications (2)

Publication Number Publication Date
JPS5659556A true JPS5659556A (en) 1981-05-23
JPS5852729B2 JPS5852729B2 (en) 1983-11-25

Family

ID=15108848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54133611A Expired JPS5852729B2 (en) 1979-10-18 1979-10-18 Method for forging parts with undercuts

Country Status (1)

Country Link
JP (1) JPS5852729B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526687A1 (en) * 1982-05-13 1983-11-18 Luchaire Sa TOOL FOR FORMING AND CALIBRATION IN PARTICULAR FOR BOWLS OF HOMOCINETIC JOINTS
JPS59147733A (en) * 1983-02-14 1984-08-24 Goushiyuu Tanzou Kogyosho:Kk Forging device
US4843864A (en) * 1987-04-10 1989-07-04 Lohr & Bromkamp Gmbh Press tooling for manufacturing constant velocity ratio universal joint members
FR2649024A1 (en) * 1989-07-03 1991-01-04 Peugeot Method of manufacturing a component having a partially spherical internal surface and an open end
CN103447445A (en) * 2013-09-20 2013-12-18 江苏海宇机械有限公司 Cold forging finishing punch for inner cavities of finish-forge pieces of outer spherical cages
CN106111863A (en) * 2016-07-11 2016-11-16 上海纳铁福传动系统有限公司 The processing method of a kind of forging and forging mold thereof
CN107584064A (en) * 2017-10-25 2018-01-16 江苏理研科技股份有限公司 A kind of distensible drift in end
CN107639196A (en) * 2017-10-25 2018-01-30 江苏理研科技股份有限公司 A kind of out star wheel forging finishing mold
CN107838350A (en) * 2017-10-25 2018-03-27 江苏理研科技股份有限公司 A kind of forming method of out star wheel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3617693B2 (en) * 1994-07-21 2005-02-09 株式会社デンソー Method of manufacturing fuel injection device component having undercut

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2526687A1 (en) * 1982-05-13 1983-11-18 Luchaire Sa TOOL FOR FORMING AND CALIBRATION IN PARTICULAR FOR BOWLS OF HOMOCINETIC JOINTS
EP0094875A1 (en) * 1982-05-13 1983-11-23 Luchaire S.A. Forming and calibrating tool, especially for bowl-shaped journal sockets of homokinetic universal joints
JPS59147733A (en) * 1983-02-14 1984-08-24 Goushiyuu Tanzou Kogyosho:Kk Forging device
US4843864A (en) * 1987-04-10 1989-07-04 Lohr & Bromkamp Gmbh Press tooling for manufacturing constant velocity ratio universal joint members
FR2649024A1 (en) * 1989-07-03 1991-01-04 Peugeot Method of manufacturing a component having a partially spherical internal surface and an open end
CN103447445A (en) * 2013-09-20 2013-12-18 江苏海宇机械有限公司 Cold forging finishing punch for inner cavities of finish-forge pieces of outer spherical cages
CN106111863A (en) * 2016-07-11 2016-11-16 上海纳铁福传动系统有限公司 The processing method of a kind of forging and forging mold thereof
CN107584064A (en) * 2017-10-25 2018-01-16 江苏理研科技股份有限公司 A kind of distensible drift in end
CN107639196A (en) * 2017-10-25 2018-01-30 江苏理研科技股份有限公司 A kind of out star wheel forging finishing mold
CN107838350A (en) * 2017-10-25 2018-03-27 江苏理研科技股份有限公司 A kind of forming method of out star wheel

Also Published As

Publication number Publication date
JPS5852729B2 (en) 1983-11-25

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