Safe handling of 8-m mirror blanks during manufacture: equipment designs based on finite element analyses of stresses

Details Safe handling of 8-m mirror blanks during manufacture: equipment designs based on finite element analyses of stresses Safe handling of 8-m mirror blanks during manufacture: equipment designs based on finite element analyses of stresses

Aug 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3352..318p&link_type=abstract

Proc. SPIE Vol. 3352, p. 318-327, Advanced Technology Optical/IR Telescopes VI, Larry M. Stepp; Ed.

Physics

Scientific paper

The manufacturing of 8-meter mirror blanks by Corning's hex seal process requires several handling steps, including lifting and turnover of both plano and contoured configurations. Special equipment was designed and built to lift and turn these 35-ton, 27-foot diameter pieces of glass. Finite Element Analysis was used to evaluate the lifting and turnover equipment designs and the handling processes. The analyses predicted the stress and distortion in the glass. The results showed that the equipment designs and processes would be safe; that is they would not stress the glass beyond the safe design stress limits.

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