冷滚打花键表面粗糙度加工参数域确定

DETERMINATION OF MACHINING PARAMETERS OF COLD ROLL-BEATING SPLINE SURFACE ROUGHNESS

为获得适用于不同工况的冷滚打花键表面粗糙度加工参数域,基于冷滚打花键成形原理,开展冷滚打花键表面粗糙度试验,利用试验结果构建冷滚打花键表面粗糙度响应曲面预测模型,采用方差分析法、试验样本测试及试验值与预测值对比分析,验证了预测模型切实可行,分析滚打轮转速、工件进给量与表面粗糙度的变化规律,基于表面粗糙度精度等级对照表确定了冷滚打花键表面粗糙度的加工参数域。研究结果表明:滚打轮转速976 r/min^2936 r/min、工件进给量7 mm/min^56 mm/min范围内,随着滚打轮转速、工件进给量的逐渐增加,表面粗糙度呈现出先减小后增大的变化趋势;从每个精度等级对应的加工参数域中随机抽取五组加工参数进行试验,得到表面粗糙度试验值与预测值最大相对误差为2.75%,从而表明确定的冷滚打花键表面粗糙度加工参数域准确可靠。研究成果为控制冷滚打花键表面粗糙度具有重要的应用价值和一定的理论指导意义。

In order to obtain the cold roll-beating spline surface roughness processing parameter domain suitable for different working conditions.Based on the principle of cold roll-beating spline forming,carry out cold roll-beating spline surface roughness test,using the test results to construct a surface prediction model for surface roughness response of cold roll-beating spline,using the analysis of variance,test sample test and comparison of experimental and predicted values,it is verified that the predictive model is feasible.Analyze the variation of the rotational speed of the rolling wheel,the feed rate of the workpiece and the surface roughness,the processing parameter domain of the surface roughness of the cold roll-beating spline is determined based on the surface roughness accuracy level comparison table.The results show:The rotational speed of the rolling wheel is 976 r/min^2936 r/min,and the workpiece feed rate is in the range of 7 mm/min^56 mm/min,with the gradual increase of the rotational speed of the rolling wheel and the feed rate of the workpiece,the surface roughness shows a trend of decreasing first and then increasing.Five sets of processing parameters were randomly extracted from the processing parameter fields corresponding to each accuracy level,and the maximum relative error between the surface roughness test value and the predicted value was 2.75%.Therefore,it is shown that the determined cold roll-beating spline surface roughness processing parameter domain is accurate and reliable.The research results have important application value and certain theoretical guiding significance for controlling the surface roughness of cold roll-beating spline.