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Abstract The auto synchronizer cone ring is a typical iron-based powder metallurgy part. It has large production
batch and many difficulties in the cutting process with a lot of pore structures and hard particles inside the powder
metallurgy parts. Intermittent load impact is produced in cutting procedure, which seriously affects the tool service
life. In this paper, the porous characteristics of powder metallurgy materials are studied, the corresponding relationship
between the density and pores of powder metallurgy materials is selected for modeling, the porosity of the material
is deduced from the density, and the pore distribution law of the material is simulated by the normal distribution
of random points. DEFORM 3D cutting simulation studies the changing laws of force and temperature during
cutting of single-hole and porous materials. The calculation results show that the cutting stress caused by the pores
fluctuates greatly, resulting in micro-impact fatigue damage; the pore structure causes the accumulation of heat and
aggravates the oxidative wear of the cutting edge; it is the key factor that causes the rapid wear of the tool.
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Received: 21 July 2021
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2022, Vol. 32 
