FIELD: machine engineering, namely, production of parts of valves of piston engines and compressors. SUBSTANCE: method comprises steps of making by cross taper rolling symmetrical blank in the form of rod having thickened ends portions at predetermined relations of diameters of initial blank of rod, rod portion near its end and volume of thickened part; cutting blanks by two identical portions, forging simultaneously each portion by successively reduction and closed forming during one stroke of press. EFFECT: increased efficiency, reduced cost of tools. 3 dwg
Authors
Dates
1997-02-27—Published
1993-12-03—Filed