Experimental Study on the Formation Mechanism of Serrated Chip of TC11 Titanium Alloy

Abstract:

Serrated chips were a universal phenomenon and it had a significant effect on cutting process. In this paper, single tooth dry cutting of TC11 titanium alloy were conducted on a five-axis CNC machine using Stellram milling cutter with a diameter of 32 mm. Both chip macroscopic morphology and microcosmic morphology of TC11 titanium alloy were studied in-depth examining the impact of cutting speed and feed rate to the serrated chips. The results showed that: with the increase of cutting speed, the chip morphology of titanium alloy TC4 experienced a change process from the hair bar to a “C” shape and then become a long strip. The critical cutting speed of TC11 for serrated chips was found at 80 m/min and the critical feed rate to form serrated chip was defined as 0.05mm/z. With the increasing of cutting speed, the extent of chip serration was significantly enhanced. Increasing cutting speed can decrease the feed rate to form serrated chips.

• Periodical: Key Engineering Materials (Volume 693)
• Pages: 767-774
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.693.767
• Online since: May 2016
• Authors: Liang Wen*, Chang Qi Yang, Qiu Lin Niu, Wei Wei Ming, Ming Chen
• Keywords: Cutting Speed, Feed Rate, High Speed Machining, Serrated Chip, TC11

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