以前加工高精度工件孔时,由于机床旧,工作内孔小,公差也小,镫一刀后,即使光面塞规下不去,也不知道有多少余量,给批量生产造成困难,若使用多台阶光面塞规(见图)量一下孔,就能知道孔还有多少余量,再根据余量进刀。这对批量生产有着显著 In the past when processing high-precision workpiece hole, due to the old machine, the working hole is small, the tolerance is also small, 镫 a knife, even if the smooth Cypriot regulations go down, do not know how much margin, to mass production caused difficulties, if used Multi-level smooth plug gauge (see photo) amount of holes, you can know how much hole remaining, and then according to the margin into the knife. This is significant for mass production