Analysis Of Working Performance Of High-weight Non-woven Fabric Needling Machine

The needling machine is a large textile machinery,which has complex structure and large working load.It is an important production equipment for needling nonwovens.The nonwovens produced by needling machine have the advantages of compact structure,high filtration efficiency and good mechanical properties,which are widely used in synthetic leather base cloth,medical and health products,furniture cloth and filter materials.In this paper,the high-weight non-woven fabric needling machine is taken as the research object,and the working principle and main mechanism performance of the needling machine are analyzed.Through the analysis of the movement of the needling mechanism,the position,velocity and acceleration movement characteristics of the needle beam and needle plate parts with the change of eccentric angle are obtained,The results show that the needle movement is easy to produce a greater impact,which causes the bending deformation of the key parts of the bed and the vibration of the needling machine,and affects the quality of needled nonwovens and the safety of the equipment.The balance analysis of the needling mechanism is carried out to determine the counterweight scheme,and the balance effect of the needling mechanism is verified by Adams dynamic simulation software.The ANSYS Workbench finite element analysis software is used to carry out the modal analysis of the supporting bed and frame of the key parts of the needling machine,and the natural frequencies and modal shapes of each stage are obtained,which proves that the supporting bed and frame will not produce resonance under the normal working frequency.The experimental research on the needling machine is carried out.The main research object is the part of the supporting bed,and the field measurement is carried out.The bending deformation parameters and needling force parameters of the supporting bed are measured.Through the analysis of the experimental data,it is found that in the operation process of the needling machine,the maximum deflection of the supporting bed is 0.2959 mm,and the maximum needling force is 34350 N.ANSYS Workbench is applied to static simulation of supporting bed and frame.The results show that the experimental data of needling machine is reliable,and the strength and rigidity of bed and frame can meet the safety requirements.In order to reduce the impact of needle movement and improve the rigidity of key parts such as the supporting bed and frame,the optimal design of the needling machine is carried out.The needling mechanism of the traditional high-weight non-woven fabric needling machine is designed as a new needling mechanism of single axis and double drive needle plates.This makes the two groups of needle parts move up and down alternately,so as to reduce the needling force acting on the supporting bed at the moment,improve the rigidity of the supporting bed,and reduce the vibration and impact caused by the needle movement.At the same time,the paper optimizes and improves the frame of the needling machine.On the basis of ensuring the strength and rigidity of the frame structure,the dynamic and static characteristics of the frame are improved,and the lightweight design of the frame structure is realized.