How to reduce the coaxiality error of the coordinate measuring machine?

How to reduce the coaxiality error of the coordinate measuring machine? Published: 2019-08-05 Source: http://www.microaccuracy.com/ The three-coordinate measuring machine can place the measured object in the three-coordinate measurement space, so it is very suitable for coaxiality measurement, but the same Axial error is also a common phenomenon in the CMM measurement process, so how can the coaxial error of the CMM be reduced? The coaxiality error of the three-coordinate measuring machine during the measurement and use is mainly caused by the in-depth analysis of the workpiece, the unreasonable configuration of the measurement components, and the improper measurement method. The following Miaoji Technology will share with you two effective methods to solve the problem of coaxiality measurement: The first method: When the reference axis and the measured axis are short and far away, if the common method is used to evaluate the coaxiality, it will be The reference axis of the measurement is extended to the measured axis, and then the maximum distance between the measured axis and the reference axis is calculated twice to obtain the coaxiality error. The error of such measurement results is often large and does not conform to the actual situation. In this case, the following methods should be adopted. Specific method: first take 2 cross sections on the reference axis, then take 2 cross sections on the measured axis, use the center points of the 4 cross sections to construct a common axis, and then respectively calculate the reference axis and the measured axis to the common axis Coaxiality, take the maximum value as the coaxiality error. The second method: When the reference axis length of the tested part is longer and the distance between the reference axis and the measured axis is relatively short, if the reference axis is measured with a standard measuring rod (length 2Oram), the distance between the first section and the last section It must be less than 20 mm, so the measurement error has been magnified by more than 10 times when the axis is measured, and the measurement result is of course unbelievable. Therefore, when measuring such parts, the distance between the first and last sections of the reference axis should be increased to reduce the error caused by the deviation of the reference axis. Moreover, in the actual operation of the coordinate measuring machine, first select the appropriate extension rod to make the measurement length large enough, and then select the appropriate probe components, such as a large probe ball or a star probe, so as to measure the rod during the measurement process. No interference with the workpiece. Using the above methods can improve the coaxiality error problem that occurs when using a three-coordinate measuring machine, and can effectively improve the measurement accuracy. At the same time, selecting a high-performance and high-quality three-coordinate measuring machine can also reduce measurement errors. Miaoji Technology has been focusing on the research and development of high-precision measuring equipment for many years, and currently can provide a variety of high-quality performance three-coordinate measuring machines and one-key measuring equipment.