In order to solve the problems of heavy casting and forgings with large machining allowance, low cutting efficiency and large consumption of tools, in October 1985, our factory cooperated with Pazhou Cemented Carbide Factory to carry out research and test work on heavy-duty knife. JCD01A - machine clamp heavy duty tool. It has achieved remarkable results through production and use verification. It passed the provincial appraisal in November 1986. It is the first in the blind hole and clamping of the blade. Its cutting performance has reached the domestic advanced level, and it is on the large lathe. The casting and forging processing provided a good tool and won the third prize of Shandong Science and Technology. The tool was awarded an excellent performance project when it participated in the advanced tool technology performance in Henan Province in November 1988. Structural performance of the tool
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