The multi-objective optimization design of a new closed extrusion forging technology for a steering knuckle with long rod and fork

  • Jie Zhou
  • Lei LinEmail author
  • Yan Luo


A new forming technology of car steering knuckle was presented, aiming at eliminating the defects in the existing steering knuckle forming process. Based on orthogonal experimental design to numerical simulation by using FEM, for steering knuckle closed extrusion of multi-objective optimal design problems in systematic research, the influences of extrusion temperature and speed, mold temperature, and lubrication of forming technology were discussed with comprehensive scoring method and integrated balance method, then the process parameters used in the forming were applied in the productive practice. Results show that the orthogonal test method combined with finite element simulation can be flexible and efficient in handling of multi-objective optimization problems. As for the forming of other types of long rod fork forging, the new process and the design method have important guiding significance.


Steering knuckle Closed extrusion-die forging Pre-forging part Orthogonal experimental design 


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© Springer-Verlag London 2014

Authors and Affiliations

  1. 1.College of Materials Science and EngineeringChongqing UniversityChongqingPeople’s Republic of China

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