泵缸体是液压泵的核心元件，其中柱塞孔轴心线不直度误差要求极高，必须保证在0．001～0．003毫米以内，为了检测这一尺寸参数，我厂多年来一直都是沿用五十年代的检测方法，即采用普通分级式量棒进行测量。现在我们研究设计了一种气动量规，仅仅只需要几级气动量规就能替代几 Pump cylinder is the core of the hydraulic pump components, including the plunger hole axis is not straightness tolerance requirements are extremely high, must be guaranteed within 0.001 ~ 0.003 mm, in order to detect the size of the parameters, I have been for many years Are using the detection method of the fifties, that is, the use of ordinary grading rod to measure. Now we study the design of a pneumatic gauge, only just a few levels of pneumatic gauges can replace a few