成人黄色网,射久久,日韩午夜电影,欧美色逼,亚洲国产成人精品女人久久久,丁香五月综合,神马午夜,精品国产天线2024,日韩亚洲欧洲在线rrrr片,中国午夜伦理片,人妻无码碰碰视频,国产福利视频在线观看福利,国产欧美日韩在线播放,无码在线观看精品一区二区,精品久久久久成人免费,日韩六区,一区二区三区无码免费视频,女同在线观看,福利午夜理论片,久久久噜久噜久久综合,亚洲国产综合自在线不卡,两男一女一床一添一摸,最真实的国产成人网站,奇米影视7777久久精品人人爽,小荡货腿张开让我爽视频,麻豆精品成人福利视频一区,动慢视频,av男人天堂网站,亚洲无码专区在线观看亚,欧美自拍亚洲综合图区,国产桃色无码春色视频在线观看,国产精品VIDEOSSEX久久发布-国产伦精品一区二区三区妓女-9...,国产精品乱码一区二三区

The piston rod is a highly technical and frequently moving component currently used to support the piston for work. When users purchase, their selection criteria include materials, tolerance size, surface smoothness, surface roughness, surface hardness, load-bearing capacity, electroplating layer, straightness, and other issues. Below, we will introduce several measurement methods:
1. Micrometer method
The micrometer method is a method of measuring the straightness of a piston rod, mainly used to measure the straightness of a cylindrical element or axis.
2. Fitting method
The fitting method used in measuring straightness is mainly based on the principle of comparing the measured element with the ideal element.
3. Pitch method
The pitch method is generally applicable to the measurement of long parts. For example, when dividing the measured length of the piston rod into several small segments, we can use instruments such as a level gauge and an automatic calibrator to measure the relative readings of each segment. Then, the straightness error is obtained through relevant data processing.
4. Data acquisition instrument connection dial indicator method
The measurement principle of the straightness data acquisition instrument connected to the dial gauge method mainly refers to reading and retrieving measurement data from the data acquisition instrument and the dial gauge. Then, based on the calculation software in the data acquisition instrument software, the straightness error of the product is automatically calculated, which can reduce the error caused by manual reading.