JPS57156841A - Bending method for grooved strip material - Google Patents

Bending method for grooved strip material

Info

Publication number
JPS57156841A
JPS57156841A JP4374581A JP4374581A JPS57156841A JP S57156841 A JPS57156841 A JP S57156841A JP 4374581 A JP4374581 A JP 4374581A JP 4374581 A JP4374581 A JP 4374581A JP S57156841 A JPS57156841 A JP S57156841A
Authority
JP
Japan
Prior art keywords
bent
strip material
plate
bending
grooved strip
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
JP4374581A
Other languages
Japanese (ja)
Inventor
Sakumatsu Ito
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.)
Ito Kogyo KK
Original Assignee
Ito Kogyo KK
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 Ito Kogyo KK filed Critical Ito Kogyo KK
Priority to JP4374581A priority Critical patent/JPS57156841A/en
Publication of JPS57156841A publication Critical patent/JPS57156841A/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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

PURPOSE:To bend a grooved strip material easily and correctly without deforming and damaging the same in the stage of bending said material by setting spring leaves in the grooves in the working position. CONSTITUTION:Spring leaves 3a-3g of prescribed length are arrayed and set in grooves 2 around the position 4 to be bent of a grooved strip material 1 from one side 5 to the other side 6. Thence, in this state, the material 1 is bent and is passed in rolls 7-11. As a result, the inner side 5 is shrunk and the outer side 6 is extended, whereby the material is bent. In this case, the inner side 5 and the plate 3a, the plate 3 groups each other and the plate 3g and the outer side 6 back up each other respectively, and these are one body as a whole; therefore the external bending forces exterted to these act eqally to each part, thereby maintaining balance with the stresses produced from the respective parts. Hence, the local bending by the partially acted forces is eliminated and the strip material 1 is correctly bent.
JP4374581A 1981-03-24 1981-03-24 Bending method for grooved strip material Pending JPS57156841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4374581A JPS57156841A (en) 1981-03-24 1981-03-24 Bending method for grooved strip material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4374581A JPS57156841A (en) 1981-03-24 1981-03-24 Bending method for grooved strip material

Publications (1)

Publication Number Publication Date
JPS57156841A true JPS57156841A (en) 1982-09-28

Family

ID=12672294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4374581A Pending JPS57156841A (en) 1981-03-24 1981-03-24 Bending method for grooved strip material

Country Status (1)

Country Link
JP (1) JPS57156841A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202728A (en) * 1985-03-05 1986-09-08 Mitsubishi Electric Corp Method of bending section having recessed groove

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61202728A (en) * 1985-03-05 1986-09-08 Mitsubishi Electric Corp Method of bending section having recessed groove

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