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钼丝损耗引起的加工精度误差,会导致凹凸模配合间隙减小,对于材料薄,配合间隙小的模具甚至无法配合。怎样延长钼丝使用寿命呢?我们的做法是:钼丝损耗分级补偿。钼丝损耗分级补偿就是是先根据钼丝损耗的趋势,将钼丝直径分成若干个等级,编程人员按钼丝的不同直径,结合模具间隙大小,一次给出△R的值,操作者在加工前用千分尺测量钼丝直径(多点测量取平均值),对照工艺要求置入相应的△R值进行加工。我厂使用的钼丝规格为φ0.1mm,以0.005mm为数量级,分为+φ0.1mm、+φ0.095mm、φ0.090mm、φ0.085mm(根据需要还可增加φ0.080mm、φ0.075mm)四个等级。利用这种方法,在钼丝损耗的不同程度下都能加工出合格的零件。如加工较高精度的多型腔凹模时,还可以在下一型腔加工前重新测量钼丝直径,按钼丝损耗的不同程度,修改△R值,再继续进行加工。
Molybdenum wire loss caused by the processing accuracy of error, will result in reduced punch and die gap, the thin material, with a small gap with the mold or even unable to cope. How to extend the service life of molybdenum wire? Our approach is: molybdenum wire loss grading compensation. Molybdenum wire loss grade compensation is the first according to the trend of molybdenum wire loss, the molybdenum wire diameter is divided into several levels, the programmer according to the different diameters of molybdenum wire, combined with the size of the mold gap, once the value of △ R, the operator in the processing Before using a micrometer to measure the diameter of molybdenum wire (multi-point measurement average), the control process requirements into the corresponding △ R value for processing. Our factory uses molybdenum wire specifications φ0.1mm, order of magnitude of 0.005mm, divided into + φ0.1mm, + φ0.095mm, φ0.090mm, φ0.085mm (can also increase φ0.080mm, φ0.075mm Four levels. With this method, qualified parts can be machined to varying degrees over the loss of molybdenum wire. Such as the processing of high-precision multi-cavity concave die, but also in the next cavity before processing re-measure molybdenum wire diameter, molybdenum wire loss according to varying degrees, modify the △ R value, and then continue processing.