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ZL40、ZL50轮式装载机的副车架（图1a）、副车架支架（图1b）、前铰接架等零件都有同轴度要求,且要求精度都较高。由于零件尺寸较大,在没有工装的情况下,用一般设备加工很难达到图纸设计要求。我厂是在T611B镗床上加工这类零件的,原工艺没有工装,按工件划线找正,压紧工件,先镗一端孔至图纸要求,再将镗床工作台回转180°镗另一端孔至图纸要求。由于镗床回转工作台的中心很难与镗杆中心,即工件两端孔中心找正,两端孔中心线至少有一个孔的中心线与工
ZL40, ZL50 wheel loader sub-frame (Figure 1a), subframe frame (Figure 1b), the front articulated frame and other parts have a coaxial requirements, and the requirements are higher accuracy. Due to the larger size of the part, in the absence of tooling, it is difficult to achieve the design requirements of drawings with the general equipment processing. Our factory is in T611B boring machine processing of such parts, the original process without tooling, according to the workpiece crossed to find out, compacting the workpiece, first boring a hole to the drawings required, and then turn the boring machine table 180 ° boring the other end hole to Drawing requirements. Because boring machine rotary table is difficult to center with boring bar center, that is, both ends of the hole center of the workpiece, both ends of the hole centerline at least one centerline and hole