1、液压摇臂钻主轴套筒与箱体导向轴套合作空隙太大。应修整套筒，更换导向轴套。
1, hydraulic rocker drill spindle sleeve and box guide sleeve cooperation gap is too big. The bushing should be trimmed and replaced by the guide sleeve.
2、主轴轴向窜动太大。应调整主轴上背母，削减轴向空隙，确保在0.01毫米以内。
2, spindle axial movement too big. Should adjust the spindle back mother, cut axial clearance, to ensure that within 0.01 millimeters.
3、主轴锥孔与钻头锥柄合作不好。使用铸铁莫氏锥捧研磨锥孔， 确保与规范检验心棒
3, spindle hole taper shank drill and cooperation is not good. The use of cast iron with Morse taper grinding cone and rod inspection, to ensure the specification
的接触面积不少于70％。
The contact area is not less than 70%.
4、工件装夹过紧或夹紧部位不妥，形成工件变形。应合理挑选夹紧部位，准确夹紧工件。
4, workpiece clamping too tight or clamping parts wrong, forming workpiece deformation. The clamping parts should be selected and the workpiece should be clamped accurately.
5、夹紧部位重复精度差及夹紧不结实。应从头调整夹紧部件，确保重复定位精度和夹紧结实。
5, clamping parts repeat accuracy is poor and clamping is not strong. The clamping components shall be adjusted from scratch to ensure repeatable positioning accuracy and clamping strength.
6、主轴锥孔内有毛刺或研伤，形成钻头歪斜。使用刮刀修刮内锥孔毛刺或研仿部位，确保锥
In 6, spindle taper burr or polishing, form a bit askew. Use scraper inner burr or imitation research site, ensure the cone
孔轴心线的径向圆跳动差错靠主轴端小于0.02mm。
The radial circle runout of the center axis of the bore depends on the spindle end less than 0.02mm.
7、钻头主切削刃长短不一。应从头准确刃磨钻头，确保主切削刃长短共同，刃口对称及尖利。
7, the main cutting edge length of drill bit. The drill bit shall be accurately sharpened from head to side to ensure that the main cutting edges are common and the edges are symmetrical and sharp.
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