Knitting Mechanism Analysis Of Computerized Silk Stockings Machine With Compact Needle

Since the twentieth century,industrial developed from mechanization to electronic,and gradually became intelligent.Hosiery machine enterprises around the world have developed a new generation of computer hosiery machine.The latest computer silk stockings machine have been meet needle distance,high speed,intellectual,such as Italy Lonati510 computer silk stockings machine compared to common silk stockings machine speed faster,up to 1000 RPM.Under such a high speed,domestic hosiery machine knitting institutions can appear larger vibration and abrasion.The service life of the machine with foreign new silk stockings machine has certain gap.The reason is domestic industry in the whole machine design level,mechanical manufacturing process,the body material,heat treatment and so on not to reach level abroad.In order to further improve the performance of the domestic hosiery machine,need to go into details of the hosiery machine of knitting principle.In this thesis,the structure analysis of computer silk stockings machine knitting principle and knitting elements.The formation mechanism of elastic dynamics system research,Based on the movement Solid Works entity modeling and ANSYS simulation technology,the modeling and simulation was carried out on the silk stockings machine knitting mechanism research.Experiment results demonstrate the validity of the knitting machine theory analysis.For knitting organization provides theory basis for the smooth movement.Knitting auxiliary body air Draw-off Mechanism system based on the FLUENT software to simulate the flow field technology.In the process of silk stockings knitting suitable pull for the simulation research.Finally the results of measured data accord with the simulation.The thesis main research content is as follows:(1)On the basis of deeply analysis in the computer silk stockings machine knitting technology and the knitting process,through the process to calculate the knitting trajectory.Using the needle path calculated the key process parameters.Provide data reference for accurate modeling and simulation analysis.Calculated by the following the key process parameters for knitting: knitting maximum dynamic range of 4.7 millimeter.Knitting process point height is 9.3 millimeter.Tuck pointheight of process is 10.8 millimeter.Refund process point height is 11.9 millimeter.(2)In order to solve the problem of high speed motion,the elastic dynamics of the mechanism is studied.Using Solid Works to knitting triangular and latch needle modeling.The entity model into ANSYS 14.0.Finite element model for key parts loaded.The force applied on the implementation of knitting mechanism simulation analysis.The problem of complex and difficult to solve the elastic dynamic equation is solved.(3)Based on the simulation model of the traction mechanism.A two-dimensional flow field model is established.Then import FLUENT 14.0 flow field mechanics analysis.It is concluded that adequate pull silk stockings knitting different stages.Finally,the sensor is used to test the data,the test data with the simulation results.(4)Using the method of experimental test,Movement of silk stockings machine knitting mechanism for experimental verification.Get the latch needle displacement,velocity and acceleration motion curve.Formation mechanism was verified the correctness of the ANSYS simulation analysis.Research on the modeling and Simulation of the forming mechanism,the elastic dynamic analysis of the forming mechanism is carried out.Designed for smooth silk stockings machine under the high speed movement provides a theoretical basis.At the same time,the simulation analysis of air force system consistent with the measured data.Shows the software simulation can be used for air force analysis.