Method Based on Standard Ball Transfer in Casting Benchmark

Author of the article:LIU Siyi, ZHANG Junwei, LIU jun, DU Haijun

Author's Workplace：Special Inspection Center, Baimtec Material Co., Ltd., Beijing 100094, China

Key Words：processing benchmark; reverse measurement; casting inspect; standard ball; deviation analysis

Abstract：The CMM and non-contact optical scanning measurement data were transmitted and verified by using the standard ball, and the casting reference was determined. The standard ball and the casting were in the same coordinate system, and the non-contact optical scanning measuring machine was used for scanning. According to the 3D model of the product, fitting calculation was carried out to obtain the ideal casting size state, so that the standard ball had the casting coordinate information. The machining coordinate system was established according to the standard ball, and the data deviation was verified to meet the machining requirements through the size of the reference target. The ideal casting size state was transferred to the CNC machining center. The results show that the target deviation of CMM benchmark can be used to determine whether the benchmark transfer and the machining results meet the requirements. The method can realize accurate and efficient transfer of datum in casting and parts processing.