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    • 7. 发明专利
    • HIGH SPEED PUNCH PRESS
    • JP2000102895A
    • 2000-04-11
    • JP27283698
    • 1998-09-28
    • IWAI TEKKOSHO KK
    • IWAI TADAAKI
    • B21D28/24B30B1/14
    • PROBLEM TO BE SOLVED: To provide a high speed punch press which can cut high accurate punching holes without cracks and also enables actual usage of a punch while minimizing the punch insertion volume at the time of punch processing by performing punch processing at high speed when punch processing is performed using a crank type pressing machine. SOLUTION: In this punch press using a crank type pressing machine, a fixed side link 2 rotatably connected to a fixed part 1 and a slider side link 4 rotatably connected to a slider 3 guided upwards/downwards are rotatably connected with a connection axis 5. Then, a crank shaft 12 rotating around a crank pin 11 installed in approximately horizontal to the connection axis 5, and the connection axis 5 are rotatably coupled with a reciprocating link 13. At the point before a crank angle accompanied with rotation of the crank shaft 12 reaches 90 deg., punch processing is performed by the punch installed below the slider 3 when the fixed side link 2 and the slider side link 4 extend on an approximately same line.