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本文以一套自主研制的车-车拉(梳)数控机床和配套刀具系统为实验平台,对车-车拉和车-车梳这两种曲轴的粗加工及半精加工工艺进行切削实验。基于何云、倪昊等学者对车拉和车梳切削机理的研究,确定了最后一步车拉和车梳主轴颈的切削参数,并在此基础上完善并确定了其他车削步骤的切削方案。完成实验后在圆度和表面粗糙度两个方面对两种工艺的加工质量进行评估分析。实验结果表明,在相同的设备条件和工件加工余量分布条件下,车-车拉加工工艺得到的曲轴主轴颈圆度公差值比车-车梳加工工艺大,而车-车拉加工工艺得到的曲轴主轴颈粗糙度值比车-车梳加工工艺小。研究结果对国内曲轴加工工艺的改进和应用有一定的参考价值。
In this paper, a set of self-developed car-car (comb) CNC machine tools and tool systems supporting the experimental platform for car-car pull and car-car comb these two crankshaft roughing and semi-finishing process cutting experiments. Based on the research of cutting mechanism of car pull and car comb based on He Yun and Ni Hao et al., The cutting parameters of car and car comb main journals were determined and the cutting programs of other turning steps were perfected and determined. After the completion of the experiment in two aspects of the roundness and surface roughness of the two processes of processing quality assessment analysis. The experimental results show that under the same equipment conditions and workpiece allowance distribution, the tolerance of the crankshaft spindle roundness tolerance obtained by the car-car pull-out process is larger than the car-car combing process, while the car-car pull-out process The crankshaft main journal roughness value obtained is smaller than the car-car comb process. The research results have some reference value for the improvement and application of domestic crankshaft processing technology.