Research On Optimization Design Of Steering Knuckle Oriented To 3D Printer Technology

Due to the limitations of traditional manufacturing processes,the structural design of automobiles often relies on traditional design methods,but the emergence of 3D printing technology makes it possible to break through traditional designs.3D printing technology can process a variety of complex geometric structures,greatly improving the degree of design freedom.In order to better play the role of 3D printing technology in the design of automobile structure,this article takes automobile steering knuckle as an example to explore the structure optimization design method for 3D printing technology.This paper first analyzes the capabilities of 3D printing,and then on the basis of the axiom design system,proposes a 3D printing-oriented structural design system,supplements the concept of method domain,analyzes the structural design constraints and design goals for 3D printing,and summarizes Facing the structural design process of 3D printing,the design ideas of the steering knuckle were briefly analyzed,and the design methods of replacement materials,generative design and filling control were determined from the method domain.This article chooses to replace the 40 Cr material used in the original steering knuckle with a lighter aluminum alloy material.In order to ensure the safety of the steering knuckle,it is necessary to conduct a finite element analysis of the strength of the steering knuckle first,and then the stress concentration of the steering knuckle is determined.The material is then changed to aluminum alloy material,and finite element simulation is performed.Aiming at the problem of low material utilization rate caused by blindly adding materials,the model was redesigned using generative design methods,and different design schemes were generated by adjusting the two parameters of volume limit and mass distribution,and the best design scheme was selected after comparison.3D printing is divided into three steps: modeling,slicing and printing.In the slicing process,different filling forms have a great influence on the mechanical properties of parts.Therefore,the filling method,filling rate,outer contour circle number and printing direction are selected as the influencing factors.First,the influence trend of different influencing factors on the mechanical properties of the parts is analyzed by the controlled variable method,and then the primary and secondary relationship of the influencing factors is determined by the orthogonal experiment method.Optimal level,and complete the printing of parts.