JPS5997727A - Press punching method by using cut and carry die - Google Patents

Press punching method by using cut and carry die

Info

Publication number
JPS5997727A
JPS5997727A JP20897782A JP20897782A JPS5997727A JP S5997727 A JPS5997727 A JP S5997727A JP 20897782 A JP20897782 A JP 20897782A JP 20897782 A JP20897782 A JP 20897782A JP S5997727 A JPS5997727 A JP S5997727A
Authority
JP
Japan
Prior art keywords
material
width
notching
product
prescribed
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
JP20897782A
Inventor
Haruo Tomizu
Original Assignee
Toshiba Corp
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 filed Critical Toshiba Corp
Priority to JP20897782A priority Critical patent/JPS5997727A/en
Publication of JPS5997727A publication Critical patent/JPS5997727A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23DPLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D31/00Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines
    • B23D31/04Shearing machines or shearing devices covered by none or more than one of the groups B23D15/00 - B23D29/00; Combinations of shearing machines for trimming stock combined with devices for shredding scrap

Abstract

PURPOSE:To improve remarkably a yield of material by notching a material into the width of product while preventing a slug from separating from the material in notching both side edges of the material by a prescribed bridge width. CONSTITUTION:Both side edges of a material 11 of width L1 are notched successively by a prescribed width B each along the feeding direction of the material 11 to conform the width of the material to the width L2 of a product 13. Here, the extent of a shear droop in the direction of sheet thickness (t) produced by the notching of a punch 18 is gradually decreased in the direction reverse to the material feeding direction 12, and the depth of shear droop at the rear end is kept to be about 0.25t so that a notched slug 15 is prevented from separating from the material 11. Next, a product 13 having a prescribed shape is punched from the material having the width L2 under the condition that the feeding bridge width A is null. Thus a press punching where the bridge width (about 0.7t) is made far smaller than a conventional threshold limit value is performed, and a material yield (about 73%) is improved remarkably.
JP20897782A 1982-11-29 1982-11-29 Press punching method by using cut and carry die Pending JPS5997727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20897782A JPS5997727A (en) 1982-11-29 1982-11-29 Press punching method by using cut and carry die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20897782A JPS5997727A (en) 1982-11-29 1982-11-29 Press punching method by using cut and carry die

Publications (1)

Publication Number Publication Date
JPS5997727A true JPS5997727A (en) 1984-06-05

Family

ID=16565286

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20897782A Pending JPS5997727A (en) 1982-11-29 1982-11-29 Press punching method by using cut and carry die

Country Status (1)

Country Link
JP (1) JPS5997727A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0780973A (en) * 1993-09-13 1995-03-28 Petoca:Kk Fiber reinforced plastic pipe and production thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0780973A (en) * 1993-09-13 1995-03-28 Petoca:Kk Fiber reinforced plastic pipe and production thereof

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