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对于航空产品专用的镁合金、铝合金、铜合金等低硬度金属材料,高精密内孔通常采用的加工工艺方法为镗削加工,能够获得空间孔特征的较高位置精度等级,但是内孔表面粗糙度等级只能稳定控制在Ra0.9-Ra1.2范围,无法达到粗糙度数值Ra0.2甚至更高的粗糙度等级。本课题通过采用单晶金刚石镗刀设计,利用常规加工中心对航空机匣壳体铜套内孔进行加工,实现了低硬度金属材料以镗削方式获得高于磨削精度等级的精密级加工。
For aerospace products, magnesium alloys, aluminum alloys, copper alloys and other low-hardness metal materials, high-precision bore commonly used processing methods boring, access to the characteristics of the spatial location of a higher position accuracy, but the bore surface Roughness level can only be controlled in the range of Ra0.9-Ra1.2, which can not reach the roughness level Ra0.2 or even higher roughness level. The subject through the use of single crystal diamond boring tool design, the use of conventional machining center of the casing of the aircraft casing brass sleeve bore to achieve a low hardness of the metal material to achieve higher than the level of precision boring boring precision machining.