JPS54147163A - Burring work method for metallic sheet - Google Patents

Burring work method for metallic sheet

Info

Publication number
JPS54147163A
JPS54147163A JP5452878A JP5452878A JPS54147163A JP S54147163 A JPS54147163 A JP S54147163A JP 5452878 A JP5452878 A JP 5452878A JP 5452878 A JP5452878 A JP 5452878A JP S54147163 A JPS54147163 A JP S54147163A
Authority
JP
Japan
Prior art keywords
burring
blank
burring work
metallic sheet
impressed
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
JP5452878A
Other languages
Japanese (ja)
Inventor
Hiroshi Asao
Kenichi Okada
Mitsuhiro Takasaki
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP5452878A priority Critical patent/JPS54147163A/en
Publication of JPS54147163A publication Critical patent/JPS54147163A/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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • B21D19/088—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws for flanging holes

Abstract

PURPOSE: To increase the forming limit, to make unnecessary the conventional shallow drawing, and to reduce the working man-hour, in the burring work for the metallic sheet, by carrying out the burring work under the condition that the compression stress is being impressed on the worked part of above metallic sheet.
CONSTITUTION: The blank 6 to be worked, in which a hole 7 is pierced, is pressed to set by the blank-holder pad 4 and the dies 3. Next, the burring punch 1 is moved upward for working to give a deformation to the blank 6. Hereupon, the spring 5 is compressed, and a compression load is impressed on the blank 6 by the punch 1 and the backup punch 2. The deformation proceeds within the field of this compression stress, and the burring work is completed. Since the burring work is carried out under the condition that the worked part is being impressed with the compression stress, the deformability of the matrial increases, and the forming limit of the burring work can be increased. Besides, since the conventional shallow drawing becomes unnecessary, the working man-hour is reduced.
COPYRIGHT: (C)1979,JPO&Japio
JP5452878A 1978-05-10 1978-05-10 Burring work method for metallic sheet Pending JPS54147163A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5452878A JPS54147163A (en) 1978-05-10 1978-05-10 Burring work method for metallic sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5452878A JPS54147163A (en) 1978-05-10 1978-05-10 Burring work method for metallic sheet

Publications (1)

Publication Number Publication Date
JPS54147163A true JPS54147163A (en) 1979-11-17

Family

ID=12973152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5452878A Pending JPS54147163A (en) 1978-05-10 1978-05-10 Burring work method for metallic sheet

Country Status (1)

Country Link
JP (1) JPS54147163A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS571525A (en) * 1980-06-06 1982-01-06 Hitachi Ltd Burring method for metallic sheet
JPS62101627U (en) * 1985-12-17 1987-06-29

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS571525A (en) * 1980-06-06 1982-01-06 Hitachi Ltd Burring method for metallic sheet
JPS62101627U (en) * 1985-12-17 1987-06-29

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