Research On The Technology Of The Detection System Of Special Sealing Ring And Its Mold

The seal ring is widely used in aerospace, weapons, ships and other manufacturing industry, mainly used in static sealing and reciprocating seal, which plays an important role in the performance of the sealing system. The mold manufacturing precision, the fit quality and the degree of the deformation and wear of the sealing ring directly determine the quality of the sealing ring, inf luence its subsequent sealing effect, therefore, it is necessary to improve the quality of the sealing ring from the aspect of mold testing. At present, the method of measuring the sealing r ing mold is not much, generally through the mold manufacturing process to ensure the quality of the mold, in the production process of laminated seal ring, there is no suitable testing method to judge the quality of the mold for the different size and type. The detection of finished seal ring is also the same, the method of random selection of sealing ring's cross section and then using microscope to observe is usually used to detect,this method must destroy the sealing r ing at the same time can not guarantee the selection of cross section is accurate, therefore, it is very necessary to design a non-contact system that uses optics to detect the sealing ring and its mold.Aiming at the problems of efficient detection of the special sealing ring and the mold cavity parameters, the features of the special sealing ring and the mold, interference factor, error calculation models were researched, the principle and constitution of detection system were summarized, a new detection system based on laser scanning sensor is proposed. The characteristic parameters of the object can be judged by multi section and multi angle scanning the contour of discrete point data and curve fitting. In the detection system, the four-dimensional precision motion platform and high precision three jaw chuck movement table which form the artifact bearing positioning platform is designed. Then, data acquisition channel is formed by using laser two-dimensional scanning sensor and NI6229 data collection, the establishment and the realization method of the measuring coordinate of the system is analyzed. Finally, based on the principle of least squares curve fitting and feature extraction algorithm is proposed. The results indicate that the uncertainty of this system can reach 6.56 um, can effectively solve the problem of the sealing ring and the mold for efficient non-contact detection, so as to improve the quality of sealing ring.