Application of reverse engineering technology in machining and measuring of small module gear

KANG Yu-hui, LI Mei-mei
（School of Mechanical Engineering, Henan Institute of Technology, Xinxiang 453003, China）

Abstract: Aiming at the problem that the machining and measuring of small module gear were difficult, the method using rapid prototyping and digital technology in reverse engineering to machine and measure small module gear was proposed. Firstly, a small module gear was designed by using Pro/E software, and the model data was imported into slicing software for processing, the manufacture of small module gear was completed with industrial SLA technology printer. Then, the point cloud data of the machined small module gear was obtained by using the industrial blue light 3D scanner, the processed data was compared with the initial modeling data, the three-dimensional digital measurement of small module gear was realized. The results indicate that the SLA technology can realize the rapid manufacturing of the small module gear, and the manufacturing accuracy can meet the requirements. The three-dimensional digital measurement can realize the comprehensive error detection of the small module gear. The method can effectively solve the problem of machining and measuring of small nonmetallic parts, shorten the manufacturing cycle, reduce the cost.

Key words: reverse engineering; small module gear; stereo lithography apparatus（SLA）; three-dimensional digital measurement