Light Weight Design Of Compound Extruder Extrusion

With the rapid development of technology, both international and domestic markets propose high demand of rubber machinery industry. Compound extruder as advanced processing equipment, occupies a significant position in the rubber machinery field and its self-innovation capability is a main criterion to evaluate technological level of fundamental manufacturing industry.Finite element approach is applied to investigate the static and dynamic stiffness characteristics of existing compound extruder extrusion, and the optimal material distribution structure is figured out by the topological optimization technology based on the analysis results. In comparison with the original design, the validity of the proposed structure achieved via finite element method is validated through static and dynamic stiffness analysis. The following contributions have been made.On the basis of 3D solid model established by Solid Works,the structural properties of the compound extruder extrusion and hydraulic lock system are analyzed at typical working condition. Objective to calculate the hydraulic load and mechanical load quantitatively, define boundary conditions and lay foundation for further stiffness analysis and light weight design.According to the finite element theory,the static and dynamic stiffness characteristics of the compound extruder extrusion and its key components are analyzed, and the displacement and stress status are studied by displacement and stress nephogram. Meanwhile, ANSYS also displays the natural frequency and vibration mode directly. Through analysis the evaluation result,the weak link can be found out to provide theoretical basic and guidance for structure improvement.Variable density method is employed to topology optimization of the compound extruder extrusion, and the optimal distribution of material is obtained by iterative algorithm in design space combining with the finite element analysis results. Digital prototype is established according to manufacturing requirement. The finite element verification results indicate that the weight is reduced by 8.90%, and has better equivalent stress distribution under the condition of design requirement, the achievement of light weight design is excellent.