Study On Uniformity Of Bobbin Forming In Automatic Winder

Automatic winder's role is to derive spun yarn from cop, winding into a larger volume bobbin to meet the needs of the follow-up process high-speed production.Meanwhile winding can eliminate fluff, dust, weak yarn, thick knots on the spun yarn to ensure the high productivity of weaving and the good quality of the fabric. There are many factors effect the uniformity of bobbins forming in the process of wind.Uniform degree of bobbins forming in circumferential direction mainly depends on the tension control system. Uniform degree of bobbins forming in axialdirection depends on pattern breaking mechanism. Therefore this paper research and optimize the tension control system and pattern breaking mechanism two factors of automatic winder.In aspect of the tension control system, first of all, this paper compare and analysis the tension control system widely used in new generation automatic winder, the tension control system is generally adopted mixed loop control system which means inspection in one place, and control in two places. But the specific control methods actually have significant differences, having their respective advantages and disadvantages. Secondly, this paper effectively integrate the advantages of the tension control system mentioned above; draw up the double closed-loop tension control system which inspection in two places and control in two places. In the end, this paper abandon the traditional PID control; taking the fuzzy control into additional tension control. The fuzzy controller that applies to the additional tension closed-loop control is designed, and simulated in Simulink environment.In aspect of the pattern breaking mechanism, first of all, this paper used Pro/ENGINEER Wildfire to modeling, assembly and kinematics simulation analysis on the swing grip arm type pattern breaking mechanism and ESPERO-M pattern breaking mechanism respectively. Kinetic characteristic curves of the two pattern breaking mechanism are obtained from kinematics simulation analysis; secondly, this paper optimizes for spindle acceleration of swing grip-arm pattern breaking mechanism in the Mathematica, and then spindle acceleration and the vibration of automatic winder is greatly reduced by optimization.