ねじ転造加工の三次元有限要素解析 : 第2報,ねじ山成形に及ぼす加工条件の影響(機械要素,潤滑,工作,生産管理など)

概要

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A thread rolling process is simulated using the three dimensional finite element method (3D FEM) to investigate the effects of the roller displacement speed, friction coefficient and the roller rotation speed on the deformation behavior of the material. In the simulation, a nickel based heat resistant alloy rod is worked on a 2 roller dies thread rolling machine. Since the plastic deformation of the material in the thread rolling occurs mainly on the material surface, especially at the root of the thread, fine meshes should be used for these portions. The three dimensional deformation of the thread generation could be simulated well by using the presented model. The simulation results that a distorted thread form is due to higher roller displacement speed, and a imperfect thread form is due to lower friction coefficient and a roundish ridge line of threads are due to lower roller rotation speed, show the similar deformation behavior observed in the practical thread rolling.
2006-08-25