Research on multi-pass spinning forming process of multi-wedge pulley hub rim
Aiming at the problems of low material utilization and cutting off the metal flow line of the tooth existing in traditional post forg-ing cutting process for producing multi-wedge pulley,taking a multi-wedge pulley part as the research object,based on the principle of spinning near-net forming,the multi-pass spinning process scheme was developed for multi-wedge pulley hub rim.Based on the SIMU-FACT software platform,the three-dimensional finite element model of the whole process of multi-pass spinning forming was established,and the material flow law and thickening of the hub rim area during each pass of spinning forming were studied by numerical simulation.The simulation results show that the outer edge of the spinning preformed blank is bent and thickened under the arc extrusion of the spin-ning bending roller in the first pass,and the overall blank is"half-arc"structure,then after the second pass of the spinning flattening roller upsetting-extrusion,the overall blank is thickened secondly and the hub rim cylinder wall that meets the thickness requirements of the spinning tooth is formed;the metal of the hub rim cylinder wall is transfered by means of the third and the forth spinning tooth process,and the tooth structure that meets the dimensional requirements is formed.The test study was carried out based on the simulation results,and the qualified multi-wedge pulley part was successfully fabricated,which verified the feasibility of the forming solution.
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