JPS56163050A - Pressing method of shaft having undercut - Google Patents

Pressing method of shaft having undercut

Info

Publication number
JPS56163050A
JPS56163050A JP6708880A JP6708880A JPS56163050A JP S56163050 A JPS56163050 A JP S56163050A JP 6708880 A JP6708880 A JP 6708880A JP 6708880 A JP6708880 A JP 6708880A JP S56163050 A JPS56163050 A JP S56163050A
Authority
JP
Japan
Prior art keywords
shaft
undercut
collarlike
split rings
shaft part
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.)
Pending
Application number
JP6708880A
Other languages
Japanese (ja)
Inventor
Hiroyuki Ando
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 JP6708880A priority Critical patent/JPS56163050A/en
Publication of JPS56163050A publication Critical patent/JPS56163050A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To work a shaft having an undercut easily with good accuracy without using any special device by punching a blank material, which has been formed with a shaft part and a collarlike part with a press, in the state that split rings are mounted to the shaft part right under the collarlike part.
CONSTITUTION: A collarlike part 5 is formed to a shaft part 4 by pressing a barlike blank material 3. Next, split rings 6 of which the bottom end face is put in contact with the part 5 are placed along the shaft part 4 of the material 3, and in this state, the material 3 is inserted into the die hole 8 of a die 7. Thence, a punch 9 is pushed in to form the material. Upon completion of the forming, the work A is removed from the die hole 8, and the split rings 6 are removed, whereby the shaft 1 having an undercut part 2 is obtained.
COPYRIGHT: (C)1981,JPO&Japio
JP6708880A 1980-05-22 1980-05-22 Pressing method of shaft having undercut Pending JPS56163050A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6708880A JPS56163050A (en) 1980-05-22 1980-05-22 Pressing method of shaft having undercut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6708880A JPS56163050A (en) 1980-05-22 1980-05-22 Pressing method of shaft having undercut

Publications (1)

Publication Number Publication Date
JPS56163050A true JPS56163050A (en) 1981-12-15

Family

ID=13334770

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6708880A Pending JPS56163050A (en) 1980-05-22 1980-05-22 Pressing method of shaft having undercut

Country Status (1)

Country Link
JP (1) JPS56163050A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007232064A (en) * 2006-02-28 2007-09-13 Akebono Brake Ind Co Ltd Groove forming method for dustproof boot of bottomed cylinder piston and piston made with the forming method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007232064A (en) * 2006-02-28 2007-09-13 Akebono Brake Ind Co Ltd Groove forming method for dustproof boot of bottomed cylinder piston and piston made with the forming method

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