JPS57121831A - Bellows forming method for cylinder - Google Patents

Bellows forming method for cylinder

Info

Publication number
JPS57121831A
JPS57121831A JP56006697A JP669781A JPS57121831A JP S57121831 A JPS57121831 A JP S57121831A JP 56006697 A JP56006697 A JP 56006697A JP 669781 A JP669781 A JP 669781A JP S57121831 A JPS57121831 A JP S57121831A
Authority
JP
Japan
Prior art keywords
cylinder
liquid pressure
forming die
bellows
liquid
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
JP56006697A
Other languages
Japanese (ja)
Inventor
Yoshiichi Shinagawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP56006697A priority Critical patent/JPS57121831A/en
Publication of JPS57121831A publication Critical patent/JPS57121831A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material

Abstract

PURPOSE:To form interval of bellows with high accuracy in forming bellows in a cylinder usig liquid pressure by limiting the direction of drawing of the cylinder to one direction. CONSTITUTION:A cylinder 5 is inserted into a clearance between a forming die and a mandrel 3, and one of O-rings 7 is positioned at the edge of one side of a recessed part 2 of the forming die 1. Pressure liquid is fed to a liquid pressure applying part 8 through a liquid pressure supplying passage 9. The liquid is sealed by two O-rings, accumulated in the liquid pressure applying part 8, and pressing force is applied on the inner face of the cylinder 5. The cylinder 5 is closely stuck to the forming die 1 by the pressing force, and formed along the recessed part 2. Since liquid pressure is not applied on the cylinder 5 that does not correspond to the liquid pressure applying part 8, the cylinder 5 is pulled into the forming die 1 only from the direction shown by the arrow. When the second bellows is to be made at an intervel, the part of the cylinder that is drawn in is made opposite to above-mentioned bellows, and liquid pressure is applied to the recessed part 2 of the forming die in the same way as the above.
JP56006697A 1981-01-20 1981-01-20 Bellows forming method for cylinder Pending JPS57121831A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56006697A JPS57121831A (en) 1981-01-20 1981-01-20 Bellows forming method for cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56006697A JPS57121831A (en) 1981-01-20 1981-01-20 Bellows forming method for cylinder

Publications (1)

Publication Number Publication Date
JPS57121831A true JPS57121831A (en) 1982-07-29

Family

ID=11645520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56006697A Pending JPS57121831A (en) 1981-01-20 1981-01-20 Bellows forming method for cylinder

Country Status (1)

Country Link
JP (1) JPS57121831A (en)

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