Design And Analysis Of Winding System For Integrated Knitting-winding-pultrusion Production Line

With the development of science and technology,composite molding products have been widely used in aerospace,petrochemical,national defense,transportation and other fields.There are many molding processes for composite prefabricated parts,and the pultrusion molding process is one of them.As one of the fastest and most effective molding processes,the pultrusion process is simple,efficient and can be controlled automatically.Pultrusion process can be broadly divided into traditional pultrusion process and combined pultrusion process.One of the combined pultrusion process,weaving-winding-pultrusion process,is a process in which continuous twist-free roving and other reinforcing materials soaked in glue are woven and wound at a certain angle,and then heated and pultruded through a die under the action of traction.This combined process adds weaving and winding process to the traditional pultrusion process,which enhances the circumferential stiffness of the molded parts compared with the traditional pultrusion process,so the weaving-winding-pultrusion process will focus on the winding process to enhance the circumferential stiffness of the molded parts.This paper proposes to realize the winding process by multi-yarn unidirectional feeding winding method,and designs a fiber winding equipment to realize the circumferential winding of products and improve the quality and production efficiency of fiber winding products.The main research contents of this paper are as follows:Firstly,the specific process of producing parts by traditional pultrusion molding process and the composition of equipment for pultrusion process are introduced,and the process of producing parts by the interplay between weaving,winding and pultrusion in the weaving-winding-pultrusion process,which is one of the combined pultrusion processes,is introduced,and further research is conducted on the winding process that helps to enhance the circumferential stiffness of the molded parts in the weaving-winding-pultrusion process,and the winding process according to the pultrusion molding According to the principle of pultrusion molding,we analyzed the fiber winding law,proposed the design requirements of fiber winding,and designed and calculated the fiber winding trajectory and winding angle.The winding scheme was designed according to the winding law and design requirements,and a suitable winding scheme was determined to provide a reference basis for the next design of winding equipment.Secondly,according to the selected winding process and the requirements of process parameters,the overall design of the winding equipment was proposed,and the structural design of the winding equipment was carried out by using Solid Works,and the winding disc and yarn cylinder devices in the yarn hanging module;the yarn guiding module of the winding machine;the winding machine support device;and the transmission and actuating parts of the winding machine were designed respectively.The equivalent rotational inertia,torque and power of the winding machine were calculated,and the servo motor was configured.Finally,the modules were assembled to obtain the fiber winding equipment.Thirdly,finite element analysis was conducted for the winding disc and yarn cylinder device in the yarn hanging module,the rolling bearing and support frame in the support device,and the gear pair in the actuating part by using ANSYS workbench to verify the rationality of the design and obtain the stress and deformation of the parts in the operating condition.The analysis results show that the stress and deformation are within the range of deformation and stress of the selected material.The analysis results showed that the stresses and deformations were within the allowable range of deformations and stresses of the selected materials,and adjustments were made to the size or material of the parts with larger deformations to reduce the deformations and to better withstand the corresponding loads.Fourth,because there is a certain yarn tension and vibration during the winding process,in order to analyze the yarn tension and vibration,a yarn tension and vibration model was established and the mathematical model was solved using MATLAB software to obtain the yarn tension and vibration variation.And the vibration of the yarn was controlled by using the velocity cubic control method and the fuzzy control method respectively.The results showed that when the velocity cubic control method was used,the yarn transverse vibration would become larger and larger with time when no control was applied to the yarn,and when the proper control was loaded,the yarn vibration was better suppressed,but the initial amplitude of the yarn under this control method was larger,and in order to further reduce the In order to further reduce the initial amplitude of the yarn,another control method,i.e.,fuzzy control method,was used to control the yarn vibration,and the results showed that the yarn amplitude was further reduced and the yarn vibration suppression time was shorter and better when a proper scale factor was applied to the yarn.