Experimental Study on Prestressed Cutting of Alloy Ring Parts

Abstract

In order to solve the poor cutting performance for the titanium alloy and the serious residual tensile stress distribution on the machined surface in cutting titanium alloy, the utilization of prestressed cutting method is proposed to actively control the residual stress distribution status on the machined surface in machining process. Titanium alloy ring parts were pre-stretched at different condition by a lathe-specific pretension device respectively. By the cutting experimental, the cutting force ,chip formation and surface integrity indexes are compared and studied. The results show that in suitable compressive residual stress on machined surface are achieved by utilizing the prestressed cutting method ,meanwhile procedures of residual stress adjustment after machining could be omitted. Furthermore, the magnitude of compressive residual stress could be actively controlled by adjusting the magnitude of prestressed force in certain extent. And uniform saw-tooth chip are generated in prestressed cutting, meanwhile there’s no significant increment of cutting force. Prestressed cutting method could generate good surface integrity.