| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heading machine in which the stucking of a material and a punch in a die is simply and easily eliminated when the material and the punch get stuck in the die at the beating point of the punch. SOLUTION: The crank pin 7 of a crank shaft 6 which is eccentrically rotated with a driving shaft provided on a machine base is connected with a ram through a connection rod 8 and a connection pin 9. The ram 4 is configured to reciprocate by the rotation of the crank pin 7. A hydraulic cylinder 21 for pressing upward the connecting part of the connection rod 8 and the crank pin 7 is provided at the lower part in the vicinity of the center of the crank pin 7 in the state that the crank pin 7 and the connection rod 8 are almost aligned. COPYRIGHT: (C)2003,JPO
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