Transactions of Materials and Heat Treatment

Title：Optimization of processing parameters for cold extrusion of internal thread based on numerical simulation

Authors： HUANG Xiao-long LI Xiang-feng ZUO Dun-wen SHI Da-bin LIANG Yu-xuan

Unit： Institute of Electrical and Mechanical Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

KeyWords： internal thread cold extrusion numerical simulation orthogonal experiment optimization of processing parameters

ClassificationCode：TG376.3

year,vol(issue):pagenumber：2012,37(6):187-192

Abstract：

The analysis data during the forming process including extrusion torque and extrusion temperature which made great difference to the thread quality and tap life were derived based on the numerical simulation on the process of internal thread formed by cold extrusion using Deform3D. Different processing parameters and factor level were selected to carry the orthogonal experiment out based on these two indicators to analyze the influence law of workpiece diameter, extrusion speed and coolant on them and to obtain the optimal processing parameters. A validation experiment was also carried out to show that the numerical simulation results and optimization result of orthogonal experiment are accurate and effective; the rate of internal thread tooth can well meet the joint strength requirements after forming, the surface smoothness and the thread after forming are also of good quality.

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Reference：

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