在游标卡尺的修理工作中,我们试制了一种铰链式挤压夹具。它的结构见图1。挤压夹具利用铰链构件使量爪作悬臂弯曲变形。铰链的中心轴为一扁轴,作夹具夹持定位和铰链的转动中心,也是悬臂弯曲的支点。两个挤压臂和轴用来夹持在虎钳上传递钳夹压力,使两挤压臂轴相互靠垄,从而挤压量爪的悬臂部分,使 In the vernier caliper repair work, we trial-produced a hinge-type extrusion fixture. Its structure is shown in Figure 1. Extrusion jigs utilize a hinge member to deform the jib for cantilevering. The center axis of the hinge is a flat shaft, which serves as the center of rotation of the clamp for positioning and the hinge. It is also the pivot of the cantilever. The two pressing arms and the shaft are used to clamp the pressure on the vise to transmit the clamp so that the two pressing arm shafts are mutually abutted against the ridge to squeeze the cantilever portion of the measuring jaw so that