根据生产需要,我们做了一个大内孔测量工具,测量范围1500～2700毫米。在使用前必须先将测量杆通过校对架(图2)调整到所需尺寸。首先将校对架(图1)左端压块螺母1紧固,在丁字槽内放上所需要尺寸的大八块(即大尺寸的块规)靠上右端卡脚9,紧固右端压块、拧紧螺钉10,让卡脚靠 According to the production needs, we made a large bore measuring tool, measuring range 1500 ~ 2700 mm. Before use, the measuring rod must be adjusted to the required size through the calibration stand (Figure 2). First, fasten the left-end clamp nut 1 of the calibration frame (Figure 1), place the big eight blocks of the required size (that is, the large block gauge) in the T-slot by the upper right clamp 9, fasten the right- Tighten the screw 10, so that the card feet