| 摘要 |
<p>PROBLEM TO BE SOLVED: To carry out machining without disassembling a cam unit every time in the case of machining the tip end surface of a working cam. SOLUTION: The working cam 2 sliding in link to the ascending and descending motion of an upper die 1, the cam holder 3 holding the working cam 2 so as to freely slide, and the working cam returning spring provided within the working cam 2 are provided. Also, a cam driver 5 is arranged in the lower side of the working cam 2 via a cam driver plate 4. On the other hand, the spacer 14 securing the bottom dead center of a press die is composed of the spacer plate made from a hard material, and interposed in the gap S formed between the tip end part 2a of the working cam 2 and the spring contact surface of the cam holder 3. And the working cam 2 incorporated into the cam holder 3 is held in the state fixed to the bottom dead center position by fastening so as to press the stationarily attaching member 12 consisting of a push-in/push back bolt to the opposite side.</p> |
