JPS57163013A - Punch for shear-cutting and shear-cut method - Google Patents

Punch for shear-cutting and shear-cut method

Info

Publication number
JPS57163013A
JPS57163013A JP4643281A JP4643281A JPS57163013A JP S57163013 A JPS57163013 A JP S57163013A JP 4643281 A JP4643281 A JP 4643281A JP 4643281 A JP4643281 A JP 4643281A JP S57163013 A JPS57163013 A JP S57163013A
Authority
JP
Japan
Prior art keywords
pipe
shear
edge
cutout
punch
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
JP4643281A
Other languages
Japanese (ja)
Inventor
Koji Namiue
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.)
JITENSHA SANGYO SHINKO KYOKAI
JITENSHIYA SANGYO SHINKOU KIYO
JITENSHIYA SANGYO SHINKOU KIYOUKAI
Original Assignee
JITENSHA SANGYO SHINKO KYOKAI
JITENSHIYA SANGYO SHINKOU KIYO
JITENSHIYA SANGYO SHINKOU KIYOUKAI
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 JITENSHA SANGYO SHINKO KYOKAI, JITENSHIYA SANGYO SHINKOU KIYO, JITENSHIYA SANGYO SHINKOU KIYOUKAI filed Critical JITENSHA SANGYO SHINKO KYOKAI
Priority to JP4643281A priority Critical patent/JPS57163013A/en
Publication of JPS57163013A publication Critical patent/JPS57163013A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D21/00—Machines or devices for shearing or cutting tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Abstract

PURPOSE:To rapidly form the semicircular part for T figure connection at the edge of a pipe by shear-cutting the center of the edge part of the pipe in arcuate form by a punching shear-cut blade and machining the both sides of the pipe edge part in knife form by a cutting blade. CONSTITUTION:An arcuate cutout a1 is drilled on one side close to the edge of a pipe (a) to be worked so that the virtual extension line of the cutout a1 is directed to the both sides of the edge part of the pipe (a). After the pipe (a) is set in nearly horizontal state where the cutout a1 is directed upward, a shear- cutting punch 1 is lowered, and the top edge part 1a of the punch 1 which serves as a punching shear-cut-blade is put into the cutout a1, and the arcuate edge 1b of the punch 1 which serves as cutting blade is brought into contact with the inner surface of the both sides of the edge part of the pipe (a), and said part is machined in knife form. The pipe 1 is lowered further, and the punching shear- cut blade 1a is brought into contact with the lower side part of the pipe (a) corresponding to the cutout a1, and said part is shear-cut in arcuate form to form the semicircular part at the edge part of the pipe 1.
JP4643281A 1981-03-31 1981-03-31 Punch for shear-cutting and shear-cut method Pending JPS57163013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4643281A JPS57163013A (en) 1981-03-31 1981-03-31 Punch for shear-cutting and shear-cut method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4643281A JPS57163013A (en) 1981-03-31 1981-03-31 Punch for shear-cutting and shear-cut method

Publications (1)

Publication Number Publication Date
JPS57163013A true JPS57163013A (en) 1982-10-07

Family

ID=12746984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4643281A Pending JPS57163013A (en) 1981-03-31 1981-03-31 Punch for shear-cutting and shear-cut method

Country Status (1)

Country Link
JP (1) JPS57163013A (en)

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