Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental analysis of hydraulic flexibility cold-drawing process with high precision

Authors： Zhang Zhiwu Shuang Yuanhua Zhang Chuang Zhou Yan

Unit： Taiyuan University of Science and Technology

KeyWords： High precision hydraulic flexible tube cold-drawing process is a new technology of cold-working process. The force state between the cold-drawing die and steel tube in the hydraulic flexible cold-drawing process was numerically simulated by the finite element analysis software Deform-3D. The states of stress strain and deformation regulation were simulated when the steel tube went through four die oil grooves respectively under the condition of different process parameters. The change regulations of the cross section thickness increment and longitudinal section wall thickness elongation of the steel tube in the process of flexible cold drawing were analyzed. The high precision hydraulic flexible cold-drawing tests for the 20# seamless steel tube were carried on with the optimized process parameters and the improved die structure. The effect of reducing diameter on the steel tube is obvious and the tube billet diameter drops from Φ30 mm×2 mm to Φ 26 mm×2 mm. Thus the goal of cold-drawing reducing diameter is achieved. The thickening of steel tube wall is very tiny and the average amount is 0.02 mm. The test results are in conformity with the simulation results and the surface forming quality is good.

ClassificationCode：

year,vol(issue):pagenumber：2015,40(4):78-84

Abstract：

High precision hydraulic flexible tube cold-drawing process is a new technology of cold-working process. The force state between the cold-drawing die and steel tube in the hydraulic flexible cold-drawing process was numerically simulated by the finite element analysis software Deform-3D. The states of stress, strain and deformation regulation were simulated when the steel tube went through four die oil grooves respectively under the condition of different process parameters. The change regulations of the cross section thickness increment and longitudinal section wall thickness elongation of the steel tube in the process of flexible cold drawing were analyzed. The high precision hydraulic flexible cold-drawing tests for the 20# seamless steel tube were carried on with the optimized process parameters and the improved die structure. The effect of reducing diameter on the steel tube is obvious, and the tube billet diameter drops from Φ30 mm×2 mm to Φ 26 mm×2 mm. Thus, the goal of cold-drawing reducing diameter is achieved. The thickening of steel tube wall is very tiny, and the average amount is 0.02 mm. The test results are in conformity with the simulation results, and the surface forming quality is good.

Funds：

太原科技大学研究生科技创新项目（20134006）

张志武（1988-），男，硕士研究生

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