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ELID grinding characteristics of large stamping die for Wolter mirror
Shaohui Yin1, Hitoshi Ohmori, Qing Liu
1National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha, Hunan 410082, PR China. shyin@hnu.cn
Abstract:
An ultra-precision ELID grinding of large stamping dies of Wolter mirror for X-ray telescope was presented in this paper. The large stamping dies (S55C) with confocal paraboloid and hyperboloid was ground by ELID arc-enveloped grinding. In this ELID grinding system, cast iron fiber bonded (CIFB) diamond wheels were controlled by 3-dimentional ways to scan the work-piece and generate required surfaces. Its grinding characteristics such as attainable form accuracy, surface roughness were investigated. Furthermore, some measures to improve form accuracy were discussed and verified such as truing, compensating, and on-machine measuring.
