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在带有刀口式内量爪的游标卡尺的修理工作中,往往要遇到检查外径量爪(下量爪)及内径量爪(上量爪)与主尺基面垂直度的问题。量爪与主尺基面的垂直度的检查在检定规程中虽没有明确规定,但它实际已包括在测量面间隙、示值误差等检定项目之中。因此,在修理卡尺的测量面间隙、研磨平面、制造修磨余量、修理示值误差,以及修理刀口形内量爪尺寸、直线性和平行性时,量爪与主尺基面的垂直度是一个必须考虑的因素。
In the repair of a vernier caliper with a knife-edge internal mass claw, the problem of checking the perpendicularity between the external mass claw (lower claw) and the inner mass claw (upper claw) and the main scale base surface is often encountered. Inspection of the verticality between the measuring jaw and the main ruler base surface is not clearly stipulated in the verification procedures, but it is actually included in the test items such as the clearance of the measuring surface and the indication error. Therefore, in the repair caliper measuring surface clearance, grinding plane, the manufacture of grinding allowance, repair indication error, as well as repair the knife-shaped jaw within the size, linearity and parallelism, Is a factor that must be considered.