Finite Element Simulation Of Process For Multi-Cycle Spinning And Pulley Spinning

Spinning easily manufactures the product of whole seamless hollow rotary body.It has many advantages,including good deformation conditions,excellent product performance,precise dimensional tolerances,high material utilization ratio, great product categories and so on.It has been widely application in weapons, aviation,astronavigation,civil and other metal precision forming technology departments.This paper combined with the actual production process problems. Multi-cycle spinning tube(horizontal machine products) and spinning pulley (vertical machine products) are regarded as the research object.Based on the FEM simulation technology to modification product processes,optimize process parameters and effectively improve the product quality.Multi-cycle spinning process has been widely used and relatively mature technology,but some defects such as wrinkling and cracking often appear in the production process.Production mainly rely on the experience of technical personnel continue to set up,adjust process parameters to ensure product quality. First of all,using ANSYS/LS-DYNA software established the multi-cycle spinning FEM model,which achieve billet rotation more in line with the actual production,and verified simulation results through testing.Then,the wall thickness reduction as the target combined with the orthogonal test,neural networks and genetic algorithms to optimize the process parameters.Finally,to simulation the results of optimization,the wall thickness reduction decreased and get satisfactory results.Study shows that larger feed rate,smaller rotation angle,reasonable roller diameter and fillet radius to reduce the wall thickness reduction,and maintain the uniformity of the product thickness.Multi-V pulley spinning is more difficult than other pulley spinning,this paper presents a new process base on the same volume principle and the rigid translation theory.The new process used spinning flanging replace drawing to achieve multi-V pulley side wall separate thickening;designed new pre-spinning roller base on the rigid translation so that the addendum which is most difficult forming part has been form in the pre-spinning stage and only rigid translation in the spinning stage.New process not only to ensure the accuracy of the product,but also reduces the load in the spinning stage,to extend the life of the spinning roller.To verify the feasibility of new technology,respectively simulated two different multi-V pulley spinning processes,achieved the stress-strain field,velocity field,the load curve with stroke and so on.These simulation results were compared,further to demonstrate the advantages of new technology.Analysis of the process parameters affect the multi-V spinning,provide a reference for the producte debugging.Study show that new multi-V pulley forming process can better product quality,reducing production costs and improve production efficiency.