TiBw网状增强钛基复合材料旋转超声磨削的磨削力模型

针对TiBw网状增强钛基复合材料加工时表面质量差、加工过程不平稳等问题，开展其旋转超声磨削的法向磨削力研究。分析旋转超声磨削中的磨粒运动规律，建立旋转超声磨削TiBw网状增强钛基复合材料的法向磨削力模型，并通过单因素磨削试验对模型进行验证。结果表明：在一定的主轴转速、进给速度、磨削深度及固定磨削宽度条件下，法向磨削力随主轴转速的增加而减小，随进给速度、磨削深度的增加而增大，且其磨削试验值与模型计算值的相对误差绝对值均在6%以内。模型很好地预测了TiBw网状增强钛基复合材料磨削时的法向磨削力，验证了预测模型的有效性。

Grinding force model for rotary ultrasonic grinding of TiBw mesh reinforced titanium matrix composites

To solve the problems of poor surface quality and unevenness during the processing of TiBw mesh reinforced titanium matrix composites, the normal grinding forces of rotary ultrasonic grinding were studied. The motion law of abrasive particles in rotary ultrasonic grinding was analyzed, the normal grinding force model of rotary ultrasonic grinding TiBw mesh reinforced titanium matrix composites was established, and the model was verified by single factor grinding experiment. The results show that under certain spindle speed, feed speed, grinding depth, fixed grinding width, ultrasonic amplitude and ultrasonic vibration frequency, the normal grinding forces decrease with the increase of spindle speeds and increase with the increase of feed speeds and grinding depths, and the absolute values of relative error between the grinding experimental values and the model calculated values are within 6%. The model well predicts the normal grinding force during grinding of TiBw mesh reinforced titanium matrix composites, which verifies the effectiveness of the prediction model.