中文摘要：

针对圆弧形金刚石砂轮精密修整的操作困难和装置复杂的问题，提出一种新的数控对磨成形修整方法。在该成形修整中，金刚石砂轮被驱动沿着圆弧插补运动轨迹与GC磨石对磨，逐渐形成砂轮的圆弧形轮廓，用于超硬材料的曲面磨削。在建立砂轮圆弧形轮廓的数控修整模式的基础上，分析定位误差与修整形状偏差的关系。此外，建立修整精度和修整率的评价指标，进行正交试验，研究修整工艺参数，即砂轮转速、行走速率和进给深度，对修整精度和修整率的影响。对该数控修整模式分析表明，在该数控对磨成形修整中不同半径的砂轮圆弧形轮廓能够被修整成形，可用于不同曲率的曲面磨削。同时，当定位误差在0．1mm以内时，最大的修整形状偏差不超过5μm／10mm。成形修整试验结果显示，影响修整精度和修整率的主要修整工艺参数分别为砂轮转速和行走速率。增加砂轮转速可以同时改善修整精度和修整率；增加行走速率会提高修整率，但会降低修整精度。此外，采用适宜的修整工艺，目标形状误差和目标修整率可以分别达到25．1μm/8mm和7．31×10^-3mm^3/mm^3，分别提高修整精度2～3倍和修整率约7倍。

英文摘要：

Due to the operation difficulty and equipment complexity of precision form truing of arc-shaped diamond grinding wheel, a new NC mutual-wear form truing was proposed. In this form truing, wheel is driven along arc interpolation path to grind GC stone and then arc-shaped wheel profile is gradually formed. It is used for curve grinding of super-hard materials. On the base of establishing control mode of formation radius of arc-shaped diamond grinding wheel, effect of wheel position error relative to GC stone was analyzed on form error of trued arc-shaped profile of grinding wheel. In addition, evaluation indexes of truing accuracy and truing ratio were intruded, and then truing accuracy and truing ratio were investigated by L9（3^4） orthogonal test with reference to wheel rotate speed, moving speed and depth of cut. Analytical results of NC form truing show that the profile radius of arc-shaped grinding wheel may be regulated by changing arc interpolation radii in NC mutual-wear form truing, which can suit for curve form grinding of different curvature, and form error is not larger than 5 μm/10 mm when position error between grinding wheel and GC stone is less than 0.1 mm. Experimental results of form truing show that wheel speed and wheel moving speed mainly influence truing accuracy and truing ratio respectively. Otherwise, truing accuracy and truing ratio may be simultaneously improved with increasing wheel speed, but truing ratio is enhanced and truing accuracy may be destroyed with increasing wheel moving speed. When optimal truing conditions are selected, form error of 25.1 μm / 8 mm and truing ratio of 7.31 × 10^-3 mm^3/mm^3 may be obtained respectively, enhancing truing accuracy by 2-3 times and truing ratio by about 7 times respectively.