专用锻造机械臂轻量化设计及仿真分析

Lightweight Design and Simulation Analysis of Special Forging Manipulator

针对锻造生产过程中存在的工人劳动强度大和生产效率低等问题,本文对某生产线专用锻造机械臂进行轻量化设计。通过对机械臂夹持器进行创新设计,减小夹持工件时夹持器所需的最大驱动力,并采用有限元软件,对机械臂进行极限位置处的静力学分析,得到了机械臂最大变形约3.64 mm,最大应力约38 MPa。同时,以最大变形为约束条件,以横梁质量最轻为优化目标,建立有限元数学模型,在满足机械臂末端承载能力的前提下,采用有限元整体分析和响应面优化相结合的方法,对机械臂进行优化设计。优化结果表明,优化后的机械臂最大变形减少约8%,机械臂横梁质量减少约25%,达到了专用锻造机械臂轻量化设计的目的。该研究为机械臂的后续优化工作提供一定的参考价值。

Aiming at the problems of high labor intensity and low production efficiency in the process of forging production,the lightweight design of forging manipulator for a production line is carried out in this paper.Through the innovative design of the mechanical arm gripper,the maximum driving force required by the gripper is reduced when clamping the workpiece.The static analysis of the limit position of the mechanical arm is carried out by using the finite element software.The maximum deformation of the mechanical arm is about 3.64 mm,and the maximum stress is about 38 MPa.At the same time,taking the maximum deformation as the constraint condition and the lightest beam mass as the optimization objective,the finite element mathematical model is established.On the premise of meeting the end bearing capacity of the manipulator,the finite element overall analysis and response surface optimization are combined to optimize the design of the manipulator.The optimization results show that the maximum deformation of the optimized manipulator is reduced by about 8%,and the weight of the beam of the manipulator is reduced by about 25%,which achieves the purpose of lightweight design of the special forging manipulator.This research provides a certain reference value for the subsequent optimization of the manipulator.