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HIGH ENERGY IMPACT FORMING PROGRAM.
Final rept. 8 Jun 61-31 Mar 65,
GENERAL DYNAMICS CORP AVENEL N J
Pagination or Media Count:
The purpose of this High Energy Impact Forming program was to design, fabricate and evaluate a high energy impact rubber forming machine and to determine, by direct comparison, the advancements of this method in relation to the existing rubber forming capabilities. The 20,000 psi rubber pad pressure developed by the high energy impact rubber forming machine resulted in an impressive increased formability on shrink, draw and beading operations of high strength sheet metal materials. Rubber life for hot forming at 1100 F. is increased up to 18 times. Effects on mechanical properties are comparable to those created by any other fabrication process. A prototype high energy rate impact rubber forming machine was designed, built and tested. At impact, the machine develops a pressure of 20,000 psi over a rubber pad 24 inches in diameter at an impact velocity in excess of 60 feet per second. Definite forming improvements were demonstrated and the short contact time of part to rubber head during hot forming operation allows greatly increased rubber pad life. Author
APPROVED FOR PUBLIC RELEASE