ELID grinding characteristics of large stamping die for Wolter mirror

Article type: Research Article

Authors: Yin, Shaohui | Ohmori, Hitoshi | Liu, Qing | Morita, Shinnya | Chen, Fengjun | Asami, Muneaki | Fan, Yufeng

Affiliations: National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha, Hunan 410082, P.R. China | RIKEN (The Institute of Physical and Chemical Research), 2-1, Hirosawa, Wako-shi, Saitama 351-0198, Japan

Note: [] Corresponding author. Tel.: +86 731 8823412; Fax: +86 731 8823412; E-mail: [email protected]

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.

Keywords: ELID grinding, large stamping die, Wolter mirror, arc-enveloped grinding, form accuracy, surface roughness

DOI: 10.3233/XST-2009-0227

Journal: Journal of X-Ray Science and Technology, vol. 17, no. 3, pp. 265-277, 2009