关键词: 抛光, 接触弧长, 工艺参数, 拟合方程, 影响规律, 影响程度, 优化模型

Abstract: To explore the relationship between contact arc length and process parameters,TC4 test block was polished with abrasive cloth wheel on CNC polishing machine tool and the contact arc length was calculated by the time length of polishing force.With the spindle speed,the compression depth,the feed speed and the size of abrasive cloth wheel as the process parameters,the fitting equation between the contact arc length and the process parameters was established,and the influence laws and influence degree of process parameters on contact arc length were analyzed.The optimization model was established and the optimal contact arc length and optimal process parameters were obtained.Besides,the influence of polishing force and temperature of polishing zone on the contact arc length was investigated.The results showed that the fitting degree of the fitting equation was very high;the correlations between the spindle speed,the compression depth and the contact arc length were positive;the contact arc length decreased first and then increased with the increase of the other two parameters;the spindle speed and compression depth had obvious effect on the contact arc length,and the feed speed and the size of abrasive cloth wheel had little effect on the contact arc length;the optimal contact arc length was 6.398 6 mm and the optimal process parameters were as follows: the spindle speed was 4 000 rotation per minute;the compression depth was 0.5 mm;the feed speed was 190.8 mm per minute and the size of abrasive cloth wheel was 220;the correlations between polishing force and temperature of polishing zone were positive.

Key words: polishing, contact arc length, process parameters, fitting equation, influence rule, influence degree, optimization model