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| Study on Stress Distribution of Cutting Tool for Cutting Superalloy Under High-Pressure Cooling |
| WU Mingyang, WU Shujie, CHU Weixu, LIU Keke, CHENG Yaonan |
| The Key Lab of National and Local United Engineering for High-Efficiency Cutting ＆ Tools, Harbin University of Science and Technology, Harbin 150080, China |
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Abstract Superalloys are widely used in aerospace and other fields, and are a kind of typical difficult-to-cut material. PCBN is a kind of superhard tool material, which has excellent performance in processing superalloys, but there are some phenomenon such as tool wear and serious damage in cutting process. High-pressure cooling is a new cooling method, which can effectively reduce the mechanical impact and affect the stress distribution of cutting tools. Therefore, it is important to study the stress distribution of cutting tools under high-pressure cooling. Firstly, tool stress model under high-pressure cooling is established to provide theoretical basis for tool stress variation law under high-pressure cooling; Secondly, the finite element method is used to simulate the stress distribution of cutting tools under different cooling conditions, cutting parameters and cooling pressures, and the influence law of different cutting conditions on the stress of cutting tools is obtained; Finally, the high-pressure cooling test is carried out to analyze the cutting force, stress distribution of tool and tool breakage, which provides a certain technical basis for efficient processing of superalloys and tool optimization under high-pressure cooling.
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2019, 
