An incremental die forging process for producing helical tubes

作者：Jin, Junsong; Qi, Zimei; Wang, Xinyun^*; Deng, Lei

来源：International Journal of Advanced Manufacturing Technology, 2016, 85(1-4): 99-114.

DOI：10.1007/s00170-015-7890-8

• Helical tubes
• Incremental die forging
• Die design
• Axial shrinkage
• Orthogonal test

Helical tubes have been widely used in petroleum industry, but difficulties still remain in their production processes due to their unique structures. In this study, an incremental die forging process was proposed to produce helical tubes. The die structure was designed to avoid the interference between dies and workpiece when dies open. The detailed forging process was studied via finite element simulation, while an orthogonal test was conducted to investigate the effect of parameters on the shrinkage of pitch length which was defined as a dagger p. It was found that the helical tube thickness t, the die pitch length p, the ratio of the sectional minor axis length in the pre-forging part to that in the finish-forging part q, and the feeding length of one reciprocation l all have significant influence on the forging process while no interaction exists among them. Besides, the influencing tendency of each parameter on a dagger p is acquired through orthogonal test analysis. In the end, an optimized parameter group is obtained, with corresponding experiments conducted for validation.

• 出版日期2016-7
• 单位华中科技大学