Research On Winding Machine System For Netting Machine

The winding machine facing the knotting machine is a winding and unwinding equipment for winding polyethylene rope.The spool is the winding device on the winding machine.The size of the spool is an important factor restricting the output of the fishing net with the knotting machine.With the rapid development of fishery,the demand for fishing net production is increasing.The current situation faced by winding machines with netting machines,firstly,the winding machine is directly driven by a fixed-speed motor to work on the spool,so the tension is uncontrollable during winding,so that the spool will "bulge" during winding.Phenomenon,this situation restricts the size of the spool,and the diameter affects the output of the netting machine weaving;secondly,because the winding medium is polyethylene rope,it causes the winding machine to spin up,break the yarn,and take out the thread.Tray operation is mainly done manually,which leads to low winding efficiency and high labor cost,which indirectly affects the efficiency of netting machine weaving.In response to the problem,this article has consulted a large number of documents on the winding process of winding and unwinding equipment,and designed a winding machine mechanical system and a constant tension control system that can be used for automatic winding.The subject is based on the national key research and development plan to carry out winding Computer system research,the main work is as follows:First,a single-station winding machine mechanical system is designed.The mechanical system includes an automatic unwinding mechanism,an automatic spinningin mechanism,a winding mechanism,an automatic pick-and-place tray,and an automatic yarn breaking device.In response to the precise yarn feeding requirements,the extrusiontype yarn feeding method is designed;the spring pre-compression mechanism is designed for the yarn sliding phenomenon;the automatic spinning-up process is referred to the artificial spinning-up process,and the crimping device and the rotating device are designed to achieve automatic Rotating the head;through the robot and the hot melt knife at the end of the robot,the functions of automatic picking and unwinding and automatic yarn breaking are realized;for the difficulty of constant tension winding,a pendulumtype tension feedback device is designed in the mechanical structure;Part of the structural design has resulted in a single-station winding machine mechanical system.At the same time,in order to maximize the work efficiency of the winding machine system,a multistation winding machine system was designed by studying the time for the robot to take and release the reel and the working space of the robot and the winding machine.Then,by analyzing the process of taking and releasing the reel,the complex reciprocating path is divided into the path between the station and the station and the path of the single station taking and releasing the reel.According to the principle of proximity,the distance between the station and the station is determined.For the path of the singlestation take-off and reel,use fifth-order polynomial interpolation to plan the path of the end take-off and reel.According to the principle of adaptive genetic algorithm and the shortest time optimization goal,optimize the entire trajectory of the robot to take and release the reel.The simulation results show that the use of adaptive genetic algorithm reduces the trajectory time from 143.1s to 136.096 s,effectively reducing the time to take and release the reel.Then,the tension control system plan and the influence of tension parameters are studied.The control system plan is designed,the tension formation mechanism and tension control method are determined,and the system composition is determined according to the control system plan;the tension control system is established according to the winding process of the winding machine.The influence of winding radius and friction force on tension is analyzed emphatically,and a mathematical model of tension with multivariable effects of winding radius,winding speed and acceleration is established.Assuming a certain acceleration,the relationship between tension and winding radius is obtained.Finally,the mathematical model of the tension control system is established,the mathematical models of servo motor,tension detection,and tension are established respectively,and the transfer function of the control system is established according to the control system block diagram.The PID algorithm and the fuzzy PID algorithm are used to simulate the control system.The PID parameters are obtained by parameter tuning according to the Ziegler-Nichols closed-loop system parameter tuning method,and the transient performance and steady-state error of the step response curve are analyzed.The steady state time is 70 ms,which is 80 ms earlier than the conventional PID to reach the steady state,so the fuzzy PID algorithm has a better tension control effect.A "expansion disk" experimental platform was built,recording the spool width before and after winding.After many experiments,a bar graph of the expansion ratio was obtained.The experimental results show that the expansion ratio of the 325 mm spool is lower than 0.003,which is much lower than The current expansion diameter ratio of the winding machine is 0.0086,which verifies the feasibility and superiority of the tension control system.