在修磨三用游标卡尺 (以下简称卡尺 )测深部位时 ,以前我们在平板上对主尺测深基面与测深尺端面进行研磨是靠手劲找正 ,难以保证卡尺端面与主尺基面相垂直。现在自制了卡尺端面研磨夹具 ,使用它磨出的测深尺垂直度好 ,并可显著地提高修理效率。1　夹具结构 (见图 1)(1)活动夹紧 In grinding three caliper (hereinafter referred to as the caliper) sounding site, before we on the main plate on the main ruler sounding surface and sounding ruler end face is to rely on manual strength to find it is difficult to ensure the calipers face and main ruler base phase vertical. Now made a caliper end grinding jig, use it to wear the depth gauge perpendicularity is good, and can significantly improve the repair efficiency. 1 fixture structure (see Figure 1) (1) activity clamping