Dynamic Simulation And Structure Optimization For The Mechanical System Of High-speed Loom

Nowadays, the high speed is the trend of the loom, and the dynamic performance and structure optimization for the mechanical system of high-speed loom system becomes the core technique of new loom. In this paper, the mechanical system of loom including weft insertion mechanism and beat-up mechanism will be researched and optimized by virtual prototyping analysis technique, in the way of system analysis, combining finite elements analysis (FEA) and 3D modeling techniques.First,3D modeling software and virtual prototyping analysis software is used to establish the weft insertion mechanism physical model and do the simulation analysis, gaining the simulation result curves including force of important parts, motion torque, ribbon position, velocity and acceleration and so on. Then FEA software is used to check the stress of important parts and optimize their structure according to the result of simulation analysis, and to optimize the structure of important parts, descending the weight of parts efficiently and improving the dynamic performance of weft insertion mechanism, gaining the parts of weft insertion mechanism benefitted to high-speed loom. Dynamic equilibrium is one of the important fact to impress the dynamic performance of the loom in a high speed and two proposals are proposed for the dynamic equilibrium of race mechanism in this paper, then a better one is chose to optimize it, and after that FEA software is used to check stress of it's important parts and it's natural frequency, gaining the new type of beat-up mechanism. Furthermore, a way of designing beat-up curve based on beat-up force is proposed for the beat-up mechanism in this paper, and a top-down design of conjugate cam in conjugate cam beat-up mechanism has been done by parametric design, gaining the profile curve of conjugate cam based on beat-force. Finally, in this paper, an optimization of conjugate cam based on ADAMS is proposed to modify quadric error resulting from measuring in our country's manufacture enterprises, and the results demonstrate the error of cam curve is eliminated efficiently and the dynamic performance of conjugate cam mechanism has improved obviously after optimization.