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对于如图所示的无基准面的凸模,进行线切割镶嵌修复,找正定位,是一个难于解决的问题。下面把我们的解决办法写出。首先按损坏槽的中心线找正,使槽中心线与 y 坐标轴尽量平行,用百分表头打表,往返相同距离表针位置在0.01mm 之内。找正后,镶槽起终点取在相邻两槽的中心处 A、B 点(因难以精确控制,只是大致取出)。从 A 点起始切割,切割出如图2所示的镶槽及镶块,镶块与镶槽单边过盈0.015～0.02mm。取下工件后,钳工修配镶块,呈过渡配合状态,用手能缓缓压入镶槽为好。但镶块暂且不要镶进。
As shown in the non-standard surface of the punch, the line cutting mosaic repair, to find positive positioning, is a difficult problem to be solved. Write our solution below. First of all, according to the centerline of the damaged groove, make the center line of the groove parallel to the y-axis as far as possible, hit the dial with the dial indicator, and the needle position within 0.01mm from the same distance. After the alignment, set the end of the slot taken in the adjacent two slots at the center A, B point (because of difficult to accurately control, but roughly removed). Starting from the point A cutting, cutting out the insert shown in Figure 2 inserts and inserts, insert inserts and insert unilateral 0.015 ~ 0.02mm. After removing the workpiece, fitter fit inserts, was transition with the state, with hands can slowly into the groove as well. But the insert for the time being do not set in.