矿车轴承架是易损件,所以我矿每年生产用量较大,过去加工采用划线钻孔、手动攻丝,产量低、互换性差。为改变上述问题,我们设计了专用胎具(图1),可提高效率6～7倍,长期使用后效果较好。工作时把胎具固定到钻床工作台上后,将工件平放到定心板1上,使工件上面与胎具内平面接触,扳动手 Mine car bearing frame is wearing parts, so I mine a large amount of production a year, past the use of crossed drilling, manual tapping, low output, poor interchangeability. To change the above problems, we designed a special tire (Figure 1), can improve the efficiency of 6 to 7 times, after long-term effect is better. Work fixed to the drill on the table after the workbench, the workpiece flat on the centering plate 1, so that the upper surface of the workpiece in contact with the tire, wrench