高速超声振动切削的最佳主偏角适用范围

The Most Applicable Tool Cutting Edge Angle Range of High-Speed Ultrasonic Vibration Cutting

为了研究高速超声振动切削过程中主偏角对切削力的影响,建立了高速超声振动切削的理论模型。首先分析了高速超声振动切削在不同主偏角下的切削力分布,然后计算了不同切削区域的切削厚度和单位切削宽度,以及四个金属切削变形区的切削力,最终建立了高速超声振动切削在0~90°主偏角下的切削力模型。理论和实验结果表明,对于主切削力而言,主偏角变化范围为20°~55°时,高速超声振动切削主切削力小于常规切削主切削力;对于进给抗力而言,主偏角适用范围为15°~40°;对于吃刀抗力而言,主偏角适用范围为15°~45°。为了使高速超声振动切削的切削效果达到最好,最佳主偏角适用范围为20°~40°。

In order to study the effect of tool cutting edge angle on cutting forces during high-speed ultrasonic vibration cutting(HUVC), the theoretical model of HUVC was established. Firstly, the distribution of cutting forces of HUVC at different tool cutting edge angles was analyzed. Then the cutting thickness, unit cutting width of different cutting areas and the cutting forces of four metal cutting deformation zones were calculated. Finally, the cutting force model of HUVC was built with the tool cutting edge angles of 0 to 90°. The theoretical and experimental results indicates that when the tool cutting edge angle varies from 20° to 55°, the principal cutting force is smaller than that of the conventional cutting. For the feed thrust force, the tool cutting edge angle is applicable from 15° to 40°. For the radical thrust force, the tool cutting edge angle is applicable from 15° to 45°. In order to achieve the best cutting effect of HUVC, the most applicable tool cutting edge angle is supposed to be from 20° to 40°.