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由于高速切削法的发展,对于金属切削机床的修理,要求便日益严格;此外由于采取了预防措施,机床停留在修理车间的时间,便可大为缩短。所以精确修理机床,使之满足技术要求,是有重大意义的。大修车床的最大困难,就是在于恢复已磨损导轨的准确性。修理时最困难的问题是:若裙板(Carriage apron)因拖板磨损而下降,下降尺寸等于导轨及拖板磨损的总和,此时螺桿与光桿的位置则并无改变,各零件须与此条件配合。
Due to the development of high-speed cutting method, the requirements for the repair of metal cutting machine tools have become increasingly stringent. In addition, as a precautionary measure, the machine tool stay in the repair shop time can be greatly reduced. Therefore, it is of great significance to precisely machine tools to meet the technical requirements. The biggest difficulty in overhauling the lathe is the restoration of the worn rail’s accuracy. The most difficult problem when repairing is that if the carriage apron is lowered by the wear of the carriage and the descending dimension is equal to the sum of the wear of the carriage and the carriage, the position of the screw and the polish bar will not change and the parts must match this Conditions with.