中心长度小于3毫米的(特别是中心长度为1～2毫米的)量块,使用中常因残余内应力而发生弯曲(即平面性超差),致使量块降级甚至报废。它的修复一直是我们修理工作中的难关。我们曾分别采用以下方法进行修理: 一、平板磨研法平板磨研法修理弯曲薄量块的原理:是使量块在平滑的一极鑄铁平板(不需加研磨剂)上快速的研磨,使量块与平板接触面间 The central length of less than 3 mm (especially the center length of 1 to 2 mm) block, often in use due to residual stress and bending (ie, flatness tolerance), resulting in degradation or scrapped measuring block. Its repair has always been a hurdle in our repair work. We have used the following methods were repaired: First, the flat grinding method Flat grinding method to repair the bending thin block principle: is to make the amount of block in a smooth cast iron plate (without abrasive) on the rapid grinding , So that the amount of blocks and flat contact surface