可调Ｖ形块定心装置由于ｖ形块开挡尺寸的限制，一种Ｖ形块只能适应一定直径范围的圆棒（或管材）。为解决这一问题，研制了开挡尺寸可调的两种Ｖ形块自动定心装置，介绍如下：图１所示的是具有左螺纹的左ｖ形块和具有右螺纹的右ｖ形块组成。摇动手柄，使具有相等螺距的左... Adjustable V-Block Centering Blocks A V-block can only accommodate round bars (or tubes) of a limited diameter due to the open size of the v-blocks. In order to solve this problem, two types of V-block self-centering devices with adjustable opening sizes were developed as follows: Figure 1 shows a left v-block with a left-hand thread and a right-hand v-block with a right- composition. Shake the handle so that the left