Journal of Lanzhou University of Technology ›› 2023, Vol. 49 ›› Issue (2): 56-64.

• Mechanical Engineering and Power Engineering • Previous Articles     Next Articles

Simulation model of cutting force in helical milling hole of titanium alloy based on material damage evolution

LI Wei1, ZHOU Lan1, WANG Lin-jun1, AN Guo-sheng2, FENG Li2, FENG Zhao-he3   

  1. 1. School of Mechanical and Electrical Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
    2. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metal, Lanzhou Univ. of Tech., Lanzhou 730050, China;
    3. Hangzhou Steam Turbine Company Limited, Hangzhou 310022, China
  • Received:2021-12-30 Online:2023-04-28 Published:2023-05-05

Abstract: Cutting force simulation is an effective way to reduce experimental verification costs and optimize process parameters. The material damage process is difficult to describe and the grid distortion is serious in the 3D simulation of helical milling hole. In order to solve this problems, the evolution mode of fracture energy is defined as exponential evolution, the physical separation criterion was adopted and the fracture energy parameter was determined to be 44 350 N/m. Combined with the range of axial and tangential feed in the machining cycle, the meshing parameters were set and the 3D finite element model of unit period of revolution in the stable machining stage of helical milling hole was constructed. The results show that the fracture energy and meshing parameters can effectively improve the accuracy of cutting force simulation model. The average values of axial cutting force and tangential cutting force of helical milling are 91.7% and 92% of the experimental values, respectively, with the maximum error less than 9%. The model also shows strong can also be applied to the simulation of cutting force in helical milling with different cutter teeth (single, two, three and four teeth) and the same geometry of mills.

Key words: helical milling hole, finite element model, damage evolution, cutting force

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