An error measurement method of non-circular gear tooth profiles based on digital twin

Abstract Aiming at the problem that it is difficult to measure the profile error of non-circular gears, it is proposed to establish the mathematical model of gear measuring center based on digital twin technology, and research on the detection method of non-circular gear profile error. The precision measurement of tooth profile error is realized by constructing a high-precision digital twin model. According to the transmission characteristics of non-circular gears to calculate the probe running track, write the framework of the Portal program, starting from the angle of tooth profile to calculate the non-circular gear single error, and compare with the data measured by the real gear measuring center. The results show that the maximum error of the total tooth profile error of non-circular gears based on digital twins is 1.786% compared with the actual gear measuring center, the maximum error of the tooth profile shape error is 1.875% compared with the actual measurement, and the maximum error of the tooth profile tilt error is 0.806% compared with the actual measurement. This serves to validate the feasibility and accuracy of this technology in the domain of precision measurement. This approach enhances the efficiency of measurement, reduces the cost of measurement, and provides robust support for gear manufacturing, quality control and optimal design.