An analysis of the influence of decompression cavity on the cold hobbing processes

作者：Y C Hsu; H S Lin

来源：Journal of Achievements in Materials and Manufacturing Engineering, 2008.

• Finite element method
• Decompression cavity
• Cold hobbing
• Die manufacturing

Purpose: This study aims to investigate the influence of decompression cavity on the cold hobbing processes.Design/methodology/approach: In the current study, the rigid-plastic finite element method would be used to analyze the influence of billets with different decompression cavity on cold hobbing processes.Findings: There must be an optimal shape of decompression cavity which requires the minimum hobbing load, but achieves the optimal profile precision and strengthened results needed in formed workpiece.Research limitations/implications: There were four different designs in billet. One was a cylinder without decompression cavity, and the others were the cylinders with truncate-cone, point-cone and semispherical decompression cavity respectively, with different shapes but almost the same volumes.Practical implications: Through the simulation analysis, the influence of decompression cavity with the same volumes but different shapes on the load needed in process, the change of workpiece features, and the strengthened effects on workpieces in both open type and closed type cold hobbing processes, would be explored.Originality/value: The finite element method is employed to analyze the influence of different decompression cavity of billets on the cold hobbing process.

• 出版日期2008