Design And Study On Elastic Potential Energy Fixture For The Automatic Non-woven Shoe Covers Machine

With the improvement of people’s life quality and environmental awareness, the demand of non-woven shoe covers is increasing day by day. There are a lot of advantages on non-woven shoe covers, such as beautiful, breathable, flexible, easy to decompose, can be recycled and so on. However, its mode of production is still given priority to with the traditional manual, which leads to high production costs, low efficiency, great labor intensity.It’s difficult to meet the needs of the market. The automatic non-woven shoe covers machine from our research group, which will solve the above problem effectively. It will bring great market prospect and economic benefit.As an important part of the automatic non-woven shoe covers machine, the fixture mainly uses for positioning, clamping and transmission in the whole production process. The cycle working mode of four fixtures makes the discharging period of shoe covers shorten greatly and the production efficiency of shoe covers machine improve significantly.Combining with the principle design and functional requirements of new automatic non-woven shoe covers machine, the design and research of the fixture was completed in this paper.(1) Introducing the process principle and structure scheme of the automatic non-woven shoe covers machine and elastic potential energy fixture. According to the structural parameters and technical index of the shoe covers machine, size calculation and structural design of fixture were completed. By using SolidWorks software, the three-dimensional models of each component were established, and the assembly and interference detection of the whole fixture were complete.(2) In this study, proposing a design that using elastic potential energy to drive folding mechanism. And the dynamic analysis was carried out on the folding mechanism. According to the simplified model of folding mechanism, the dynamics equation was established by using Lagrange method. By the MATLAB, numerical solution of equation and movement characteristics of the mechanism were obtained. By using SolidWorks motion to complete simulation analysis, the movement curves of system were got. Theoretical results andsimulation results are basically identical. The correctness of the theoretical model was verified. In the meantime, the simulation analysis of folding mechanism was completed in buffer process and confirming a steady position after unfolding.(3) Through the finite element analysis method to analyze the key components of the fixture. Using ANSYS software to analyze strength and stiffness of the nut block, the under plate and support frames. The stress and strain data were got and the reliability of the design was test. At the same time, the modal analysis was carried out on the support frame, which provided a reference for working frequency of prototype.(4) By simplified fixture model in the process of opening and closing, and using the ADAMS to carry out simulation analysis of the spiral lifting mechanism. The movement characteristics of the mechanism were verified.In this paper, the study of the elastic potential energy fixture has reached the expected requirement on the virtual prototype, which will prepare fully to build the physical prototype and lay a certain foundation to the further research and development of automatic non-woven shoe covers machine.