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This paper focuses on a quantitative study of chip up-curl using the recently developed universal slip-line model and includes the experimental validation. Both conventional (with flat-faced tools) and restricted contact machining are investigated. The results show that chip up-curl is primarily governed by the stress state of the plastic region, especially by the frictional shear stress on the tool rake face. The chip exhibits a stronger straightening effect in conventional machining than in restricted contact machining. The interrelationship between chip up-curl radius and cutting forces is established from the model.

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Published: 11/01/2000 Number of Pages: 6 File Size: 1 file , 630 KB