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Abstract
The cold forming process of high strength steel rods has been widely applied in manufacturing industries. Steel rods should be effectively sheared before cold forming. The shearing behavior was investigated to obtain the optimum sheared edge quality with the SCr440 steel rod for a track pin. To determine the optimal condition the simulation program based on a finite element method was used with different cutting clearance. The sheared edge quality was evaluated by the values of roundness, rollover and inclined angle of cut surface. With the increase of cutting clearance, roundness decreased while the values of rollover and inclined angle increased. This indicates that the sheared edge quality increases with the decrease in cutting clearance. However, the decrease in clearance at less than 0.35 mm led to the significant increase in the principal stress on knife and the friction between material and dies including knife. As a result, die life decreased rapidly. The sheared edge quality as well as die life should be considered on obtaining the optimum clearance for the steel rod shearing.
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