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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.