考虑同轴度的汽车发动机曲轴孔镗削工艺参数节能优化

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中图分类号：TH161DOI：10.3969/j.issn.1004-132X.2025.06.015 开放科学（资源服务）标识码（OSID）：

Processing Parameter Energy-saving Optimization for Boring Automobile Engine Crankshaft Holes Considering Coaxiality

ZHANG Dengyong LI Congbo* WU Shaoqing ZHANG You LI Chengyuan State Key Laboratory of Mechanical Transmission for Advanced Equipment，Chongqing University， Chongqing，400044

Abstract： To address the issues of the coaxiality value of the automobile engine crankshaft holes was too large or even out of tolerance after boring，and the low energy eficiency of boring processes， a study of processing parameter energy-saving optimization for boring automobile engine crankshaft holes was conducted considering coaxiality. The influencing factors of coaxiality in boring crankshaft holes were analyzed and the coaxiality value prediction models were established based on the finite element methods and support vector machine regression algorithms. Then，the energy consumption characteristics of boring crankshaft holes were analyzed，and a boring parameter optimization model was established aiming at specific energy and maximum coaxiality value. The improved multi-objective dragonfly algorithm was used to solve the model and the optimal combination of processing parameters to balance energy eficiency and coaxiality was determined. Finally，the case study indicates that after the optimization，the maximum coaxiality value is reduced by 10.81% ，and the specific energy is reduced by 4.61% ，which verifies the effectiveness of the optimization model.

Key words： automobile engine crankshaft hole;coaxiality； energy-saving optimization； processing parameter；boring

0 引言

汽车发动机曲轴孔作为发动机的核心关键部件及曲轴的唯一承载体，其加工精度很大程度上决定着发动机的性能和使用寿命，因此，实际生产中对曲轴孔的精度要求很高。（剩余15255字）