RESEARCH AND APPLICATION OF PRECISION ROLL-FORGING TAPER-LEAF SPRING OF VEHICLE

Taper-leaf springs are important elastic parts in the suspension syste m of many vehicles. Precision roll-forging is an advantaged technology for processing taper-leaves. The present paper is concerned with expe rimental research on the precision roll-forging of iso-width taper-lea f vehicle springs. Equations to evaluate the width-extension and slip- forward values that affect the workpiece quality and their correcting curves have been determined experimentally, such equations having been proven to be both practical and reliable in use. Satisfactory results were obtained when the equations were applied to the design of the ro ll-forging process and dies for forming different taper-leaf springs: there was no flash on the parts, the dimensional accuracy was high and the surface quality was excellent. Industrial applications have shown that the precision roll-forging technique for taper-leaf springs can increase the productivity, decrease production costs and investment in equipment, and meet the requirements for product quality and properti es being especially economical and suitable for the production of mass ive taper-leaf springs. (C) 1997 Elsevier Science S.A.