Precision Grinding Technology of Micro-tooth Internal Thread with Large Aspect Ratio Based on Microstructured Tools

doi:10.3901/JME.2025.05.330

Abstract

Abstract: In the grinding process of micro-tooth internal thread with large aspect ratio, the machining interference, grinding deformation and vibration are always important reasons that affect the machining accuracy. Aiming at the above problems, the micro-tooth internal thread grinding technology of microstructured grinding wheel with coarse abrasive grains is studied. The cross-section of cubic boron nitride (CBN) grinding wheel is designed by parallel axis grinding. The static, harmonic and modal performance of the composite grinding rod with large aspect ratio are analyzed, and the grinding system structure is optimized. Based on the non-simplified random abrasive grains model, the dynamic model of grinding system with large aspect ratio is established. Finally, the accuracy of the theoretical model is verified by related experiments, and the grinding parameters are further optimized. The results show that the maximum error between theoretical and experimental results is 8.1%. Microstructured tools have the ability to control grinding vibration. The average tooth height is 374 μm, thread profile angle is 90.1 °, the average bottom fillet radius is 23 μm, the average pitch is 1.006 mm, which meets the machining accuracy requirements of internal thread with large aspect ratio.

Key words: microstructured grinding wheel, internal thread, precision grinding, large aspect ratio, dynamics

CLC Number:

TH117
TH161

MENG Qingyu, MENG Bianbian, GUO Bing, GUO Zhenfei, WU Guicheng, LI Chuanqu, ZHAO Qingliang. Precision Grinding Technology of Micro-tooth Internal Thread with Large Aspect Ratio Based on Microstructured Tools[J]. Journal of Mechanical Engineering, 2025, 61(5): 330-342.

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