JPS5492565A - Projection forming for sheet material - Google Patents

Projection forming for sheet material

Info

Publication number
JPS5492565A
JPS5492565A JP15880677A JP15880677A JPS5492565A JP S5492565 A JPS5492565 A JP S5492565A JP 15880677 A JP15880677 A JP 15880677A JP 15880677 A JP15880677 A JP 15880677A JP S5492565 A JPS5492565 A JP S5492565A
Authority
JP
Japan
Prior art keywords
sheet material
punch
work
dies
stepped shape
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
JP15880677A
Other languages
Japanese (ja)
Inventor
Katsuhiko Kusaka
Takumi Tonai
Nobuo Yoshino
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 JP15880677A priority Critical patent/JPS5492565A/en
Publication of JPS5492565A publication Critical patent/JPS5492565A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a large height of projection through one pass of the projection forming work, by forming at least one of the die hole of the dies and the punch for the projection forming work into a plurally stepped shape so as to successively reduce the diameter and size of the step toward the projecting end.
CONSTITUTION: The die hole of dies 22 if formed into a plurally stepped shape so as to successively reduce the hole diameter toward the downside which is to be the projecting end of the sheet material 11. The tip of the punch 23 is similarly formed into a stepped shape so as to reduce the diameter of the step successively toward the projecting end of the sheet material 11. By thus arranging, one pass of the projecting work with the punch 23 gives the effect equivalent to the continuous projecting work with the punch and dies of larger size to the sheet material 11. According to this method, the number of labor is greatly reduced. As a rusult, the cost of the product can be reduced, and the focusing characteristic is improved by the improved accuracy of the assembly work.
COPYRIGHT: (C)1979,JPO&Japio
JP15880677A 1977-12-29 1977-12-29 Projection forming for sheet material Pending JPS5492565A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15880677A JPS5492565A (en) 1977-12-29 1977-12-29 Projection forming for sheet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15880677A JPS5492565A (en) 1977-12-29 1977-12-29 Projection forming for sheet material

Publications (1)

Publication Number Publication Date
JPS5492565A true JPS5492565A (en) 1979-07-21

Family

ID=15679755

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15880677A Pending JPS5492565A (en) 1977-12-29 1977-12-29 Projection forming for sheet material

Country Status (1)

Country Link
JP (1) JPS5492565A (en)

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