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磁钢(图1)是铁路通讯仪表产品系列的重要零件之一。过去,磨削加工是在M1432A外圆磨床三爪卡盘上进行的:先将φ29_(-0.04)~(-0.02)外圆肩面及端面磨好,然后调头再磨φ30_(-0.04)~(-0.02)外圆及端面。由于三爪卡盘精度不高,因此磨削出来的磁钢两端圆柱同轴度误差满足不了图纸技术要求。同时由于卡盘卡住的圆柱部分很短,
Magnet (Figure 1) is one of the important parts of the railway communications instrumentation product line. In the past, the grinding process was carried out on the M1432A cylindrical grinding machine with three jaws: first grinding φ29 _ (-0.04) ~ (-0.02) outer shoulder face and end face, then reshaping φ30 _ (-0.04) ~ (-0.02) outer circle and end surface. Due to the accuracy of the three-jaw chuck is not high, so grinding out of the cylinder at both ends of the cylindrical coaxial error can not meet the technical requirements drawings. At the same time due to the chuck stuck cylindrical part is very short,