Abstract
In the case metal cutting, the resisting force against the deformation of workmaterial is a very important problem. Therefore, many investigators have dealt with this problem. But, then, the workmaterial was assumed as a perfect ideal plastic, and if not, only metal property of static state was considered. In order to find the theoretical relation between the cutting force and the strength of workmaterial, we think we must take the dynamic property of workmaterial into consideration. So, we made an experiment on shear strees-strain relation at various strain rate. Basing on this, we found theoretical relation between the cutting force and the strength of material. Moreover, to make sure of it, we made cutting experiments on the same material (solder) which had been used in the shear stress-strain test. This study has definitely showed that the dynamic property of workmaterial has a great effect on the cutting force.
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