通常采用工具显微镜测量螺纹千分尺的“校对量规”半角。本文介绍检定“校对量规”测量面间尺寸的一种方法。其步骤如下: 自制空心测帽(见图1a) 工艺要求为: 1.A、B面不平行度为0.001mm; 2.φd轴心线与A、B面垂直度不大于0.002mm。首先将测帽安装在卧式测长机或同类型光学比较仪的尾管上,另一端光学计管装上仪器 Tool gauges are usually used to measure the “proof gauge” half-angle of a thread micrometer. This article describes a method for verifying the dimensions of a proofread gauge. The steps are as follows: Self-made hollow cap (see Figure 1a) process requirements: 1.A, B surface is not parallel to 0.001mm; 2.φd axis and A, B perpendicularity of not more than 0.002mm. First, the cap is mounted on the horizontal length measuring machine or the same type of optical comparator tail pipe, the other end of the optical tube mounted on the instrument