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使用如图1、图2所示的普通中心钻打出的中心孔,不能保证轴类零件之间中心孔的深度一致和口径一致,这样多件(或成批)轴类零件要求以中心孔做轴向定位进行加工时,一般是达不到工艺要求的;因此给加工带来许多不便(如车、铣、磨),以往厂里技术部门也采取过许多措施,但仍不能保证要求。为此,我在原中心钻的基础上,改制了如图3所示的新砂中心钻,主要特点是,A刃与轴向成为90°,在钻孔时,只要A刃接触到轴的端面即可,经
Using the center hole drilled by the ordinary center drill as shown in FIG. 1 and FIG. 2, it is impossible to ensure that the center holes of the shaft parts have the same depth and the same caliber, so that a plurality of shaft parts need to be made of a central hole Axial positioning of the processing, the general is not up to the process requirements; So to the processing of many inconveniences (such as cars, milling, grinding), the past, the technical department of the factory has also taken many measures, but still can not guarantee the requirements. To this end, based on the original center drill, I modified the new sand center drill shown in Figure 3, the main feature is that the A blade and the axial become 90 °, when drilling, as long as the A edge contact with the shaft end Can, after