Research on Material Removal Mathematical Models for Abrasive Belt Grinding of CFRTP Parts with Anisotropy in Mind

doi:10.3901/JME.260430

Abstract

Abstract: Carbon fiber reinforced thermoplastic composites (CFRTP) are increasingly used in large aerospace components due to their advantages of light weight, high strength, easy fabrication and repairability. The assembly quality of large components of aerospace CFRTP directly affects the safety and performance of equipment, and it is often necessary to grind and modify the near-net formed CFRTP parts to meet the accuracy requirements of connection assembly. In the grinding process, the prediction accuracy of the material removal mathematical model directly affects the contour accuracy of the part. However, due to the anisotropy of CFRTP, the traditional mathematical model cannot guarantee the prediction accuracy when grinding in different directions. Therefore, the anisotropy of CFRTP removal thickness is characterized by the directivity coefficient combined with Preston equation, and the material removal depth and material removal rate mathematical model of CFRTP parts are established taking into account the fiber direction angle. Then, the robotic grinding system of CFRTP parts is used to carry out grinding tests, and the unknown coefficients in the model are fitted, the experiment verifies that the average relative error of the model is less than 12%, and the model has high prediction accuracy. Finally, the influence of grinding parameters on material removal was analyzed, and the influence of fiber orientation angle on material removal revealed by the removal model was explained and verified by combining the surface morphology and material removal mechanism.

Key words: CFRTP, anisotropy, material removal mathematical model, Preston equation

CLC Number:

TB332

SHEN Yifan, ZHAO Huan, YAN Xin, DING Han. Research on Material Removal Mathematical Models for Abrasive Belt Grinding of CFRTP Parts with Anisotropy in Mind[J]. Journal of Mechanical Engineering, 2026, 62(9): 383-393.

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