桥板是机床修理中用来测量机床导轨的几何精度、位置精度和零件部件的安装、组合等精度所不可缺少的辅助工具。它对保证机修质量、提高生产效率,减轻劳动强度等方面具有很重要的作用。目前常用的桥板只能测量象车床类的山形平面导轨和磨床类的V形平面导轨。而对双山形、双V形导轨、正反燕尾导 Bridge is used to repair the machine tool to measure the geometric accuracy of the machine guide rail, the position accuracy and parts assembly, assembly and other precision indispensable auxiliary tools. It is to ensure the quality of mechanics, improve production efficiency, reduce labor intensity and so has a very important role. At present, the commonly used bridge plate can only measure the V-shaped plane guide rail of the lathe type such as the flat lathe and the grinding machine of the lathe type. The double Yamagata, double V-shaped guide, right and wrong dovetail guide