在重型机器制造或单件小批生产的场合,零件之间结合的螺钉孔通常都用配钻的方法加工。为保证配钻时的划线精度和提高工效,我制作了一套如附图所示的样冲套,外径根据常见的螺孔直径,内径都是一样的,和样冲滑配。操作时,把样冲套和样冲一起放在已钻孔零件的孔里,锤击一下样冲,就在配作零件上准确地定出了配孔的中心位置。 In the case of heavy machine construction or single-piece production, the screw holes that are used to join the parts are often machined with a drilled hole. To ensure the scribing accuracy and work efficiency when equipped with diamonds, I made a set of sample sleeve as shown in the attached drawings. The outer diameter is the same according to the common screw hole diameter and the inner diameter. During operation, put the sample sleeve and the sample punch together in the hole of the drilled part, hammer the sample and punching it, and the center position of the matching hole is accurately determined on the matched part.