The Structural Design And Optimization Analysis Of The Plastic-steel Length Control Machine

In the garment accessories industry,zippers have become an indispensable part of it with their unique convenience,which makes it has a huge market value.However,most of the domestic zipper products are concentrated in the middle and low-end market,and few large manufacturers have the ability to impact the international high-end market.The reason for this is mainly due to the poor performance of zipper production equipment.Therefore,this project is based on the process of plastic zipper production process to improve a fixed-inch equipment.Regarding the subject,the main research contents are as follows:(1)The production process of plastic steel zipper and the production requirements of the sizing process are briefly explained.A brief description of the production process of plastic zippers and the production requirements of the sizing process is given.The sizing equipment on the market is analyzed in terms of functional arrangement,technical parameters and structural principles.The test results reflect the drawbacks of the current inching equipment,and the subsequent optimization targets and design indexes of the equipment are proposed accordingly.(2)The specific solutions of each functional element of the fixed-inch equipment were enumerated by the "morphological evidence method" to make a preliminary screening of the rationality of the combined solution.The "fuzzy evaluation method" is used to quantitatively compare the screened solutions and select the best solution as the improvement solution.By analyzing the improvement points of the solution,it can be seen that the improvement solution integrates several functional elements of the device into the de-tooth unit.In order to verify the rationality of the solution,the structure of the deburring unit is analyzed at the theoretical level and the model level respectively.(3)In order to ensure that each mechanism in the deburring unit can complete its work according to the requirements of the scheme,the design of the cam of the active part of the mechanism is calculated.On the one hand,we select the appropriate follower motion law according to the mechanism working requirements,complete the mathematical modeling of each cam using the analytical method,and draw the corresponding contour diagram and motion curve diagram in MATLAB,so as to complete the 3D modeling of the cam parts.After that,ADAMS is used to simulate the kinematics of the actuators of each mechanism,and the simulation results further verify the rationality of the designed cams;on the other hand,to ensure that each mechanism can work with each other,the calibration of the fit angle between the cams is completed by analyzing the timing diagram of the scheme and taking the keyway of the cams as the reference.(4)Finally,in order to test the performance of the improved inching machine.Develop the control system scheme of the equipment,complete the selection of hardware in the system,and the design of PLC and touch screen program.Based on the structure and control scheme of the inching machine,the prototype of the inching machine was made and the performance test of the same index was completed.The results showed that the production speed of the inching process increased from 22pcs/min to 26pcs/min;the zipper length qualification rate increased from 86.67% to 91.67%;the percentage of defective zippers decreased from 14.67% to 8.67%.The results visually reflect the rationality of the improved equipment structure design and the reliability of the control system design.