JPS5671542A - Successive die forging method - Google Patents

Successive die forging method

Info

Publication number
JPS5671542A
JPS5671542A JP14835979A JP14835979A JPS5671542A JP S5671542 A JPS5671542 A JP S5671542A JP 14835979 A JP14835979 A JP 14835979A JP 14835979 A JP14835979 A JP 14835979A JP S5671542 A JPS5671542 A JP S5671542A
Authority
JP
Japan
Prior art keywords
main punch
subpunches
dent
punch
subpunch
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
JP14835979A
Other languages
Japanese (ja)
Other versions
JPS5835776B2 (en
Inventor
Yoshihito Sakai
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen Corp
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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP14835979A priority Critical patent/JPS5835776B2/en
Publication of JPS5671542A publication Critical patent/JPS5671542A/en
Publication of JPS5835776B2 publication Critical patent/JPS5835776B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B21J5/008—Incremental forging

Landscapes

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

Abstract

PURPOSE: To facilitate successive die forging by providing a polygonal main punch and plural subpunches which fill the circumference of the main punch and enter into the main punch closing to it at a fixed space, and repeating the pressing by the subpunches and working by the main punch.
CONSTITUTION: A main punch having a hexagonal cross section is taken as an example, and six hexagonal subpunches for pressing are arranged in a tortoise shell pattern at a fixed space. A workpiece B to be worked is put in a die 3 placed under the punch group, and a subpunch 2 is lowered to press the work piece B. Then, the main punch 1 is lowered to a set position to form a dent 4. Punches 1, 2 are returned to original position. They are moved and stopped so that one of subpunches 2 comes above the dent 4. A subpunch 2 opposite to the dent 4 is inserted into the dent 4. The workpiece B is pressed by other subpunches 2 and a dent 5 is formed by the main punch 1. Since burrs 6 are formed between the dents 4 and 5, minute cracks produced are not caught in. After repeating this process and working, the burrs 6 are removed to obtain a product.
COPYRIGHT: (C)1981,JPO&Japio
JP14835979A 1979-11-15 1979-11-15 Sequential die forging method Expired JPS5835776B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14835979A JPS5835776B2 (en) 1979-11-15 1979-11-15 Sequential die forging method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14835979A JPS5835776B2 (en) 1979-11-15 1979-11-15 Sequential die forging method

Publications (2)

Publication Number Publication Date
JPS5671542A true JPS5671542A (en) 1981-06-15
JPS5835776B2 JPS5835776B2 (en) 1983-08-04

Family

ID=15450986

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14835979A Expired JPS5835776B2 (en) 1979-11-15 1979-11-15 Sequential die forging method

Country Status (1)

Country Link
JP (1) JPS5835776B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009166074A (en) * 2008-01-15 2009-07-30 Toyota Central R&D Labs Inc Forging apparatus and forging method
JP2010172919A (en) * 2009-01-28 2010-08-12 Toyota Central R&D Labs Inc Forging apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009166074A (en) * 2008-01-15 2009-07-30 Toyota Central R&D Labs Inc Forging apparatus and forging method
JP2010172919A (en) * 2009-01-28 2010-08-12 Toyota Central R&D Labs Inc Forging apparatus

Also Published As

Publication number Publication date
JPS5835776B2 (en) 1983-08-04

Similar Documents

Publication Publication Date Title
EP0885074B1 (en) Method and device for producing stamped parts
JPS5671542A (en) Successive die forging method
JPS5650743A (en) Method and device of forming shaft with center hole
JPH01104421A (en) Chamfering and burring method
JPS5462161A (en) Forming method for pipe
JPS5641069A (en) Automatic removing and finishing method for casting fin and its device
JPS55139127A (en) Flare drawing rpocessing method for plastic plate
JPS55161541A (en) Closed rough forging method of crankshaft
JPS5647223A (en) Deep drawing method
JPS5669041A (en) Machining of bevel gear
JPS5555819A (en) Hydraulic forming die for thin shape bent pipe and forming method
JPS5671543A (en) Finishing method of semiprocessed forged product
JPS56165519A (en) Continuous press machine
JPS6487018A (en) Working method for sheet metal
SU123033A1 (en) Method of punching collar flanges
JPS5424388A (en) Punching processing method
JPS5586636A (en) Production of hand tool
SU1389922A1 (en) Method of upsetting rod-like articles having polyhedral heads
JPS55120433A (en) Method and device for try press
JPH03116238U (en)
SU965639A1 (en) Die for cutting rolled stock
JPS57206527A (en) Press working of steel plate and the like
JPS5380868A (en) Mechanical press for working long materials
JPS55114428A (en) Method for drawing square form pipe and swaging machine used for this
JPS5614047A (en) Working method by upsetter