Introduction to the measurement method of straightness of precision piston rod

     There are various methods to measure the straightness of precision piston rods, including optical method, mechanical method, laser interference method and so on. Among them, laser interferometry is a high-precision and high-efficiency measurement method, which can be used for its online inspection and quality control.

       Factors affecting the straightness of precision piston rods include errors in the manufacturing process, inhomogeneity of materials, heat treatment, etc. In addition, wear and deformation during use will also have an impact on the straightness of piston rods.

When users buy piston rods, the production material, tolerance size, surface smoothness, surface roughness, surface hardness, load-bearing capacity, plating layer, straightness and other aspects of the piston rod are the criteria for users to buy. So do you know how to measure the straightness of the piston rod? The following small to introduce you to several measurement methods.

　　1、Micrometry

　　Micrometry is a method of measuring the straightness of the piston rod, mainly used to measure the straightness of the cylinder line or axis.

　　2、Cutting method

　　Piston rod measurement of straightness using the tangential method, mainly using the measured elements and ideal elements to compare the principle of measurement.

　　3、Pitch method

　　Pitch method is generally applicable to the measurement of long parts, such as the piston rod is measured length is divided into a number of small segments, we can use the level, self-collimator and other instruments to measure the relative readings of each segment. Then through the relevant data processing to derive its straightness error.

　　4、Data Acquisition Instrument Connected with Percentage Meter Method

　　Piston rod straightness of the data acquisition instrument connected to the method of measuring the principle of percentage refers to the data acquisition instrument and the percentage of the meter, read out the measurement data of the piston rod. Then the straightness error of the product is calculated automatically according to the calculation software in the data acquisition instrument software, this method can reduce the error generated by manual reading.

　　The above are several measurement methods used to measure the straightness of piston rods. These methods are convenient for you to measure the straightness of piston rods.