problem in elec trical resistance upsettinggreenspun.com : LUSENET : Resistance Welding : One Thread
We are upsetting and forgine the valve steel of EN52, 21 4 n etc for I C Engine applications.
we are frequently having a problem of bulb folding in eltrical upsetting, which resulting crack in the valve head.
how to avoid/reduce the crack and bulb folding , please help me
-- Gopalakrishnan (email@example.com), March 12, 2004