Research On Key Technology Of Prepreg Tape Splicing And Rewinding Machine

Wide prepreg tape automatic slitting and rewinding is the main preparation methods of prepreg for automated fiber placement. Good slitting and rewinding is an important guarantee for automatied fiber placement. Based on the research of civil aircraft tail panel as the research background, in order to meet the high efficiency and high quality of the prepreg used, we study on the correction and tension technology of the split double volume. In the original 8 tow prepreg tape slitting and rewinding machine based on the improved system, enhance the function. A new generation of 16 tow prepreg tape slitter rewinder is successfully developed; the research mainly includes:(1) In order to improve the edge quality of the prepreg and reduce the waste of the cutting process, we study on precision correction technology of prepreg. A closed loop control system is designed, which is composed of photoelectric sensor, PLC controller and stepper motor. The fuzzy PID control algorithm is applied to the automatic correction system for the detection of the selected photoelectric sensor. The "big", "middle" and "small" fuzzy sets are divided into the deviation. The triangle function is chosen as the membership function, and the turning point of the membership function is calibrated. Design fuzzy PID control rules, according to the output of the KP, KI, KD parameter values for fuzzy PID closed-loop control system. Take the width of the edge as reference. The discrete coefficient is 29.6% and the correction device is reduced to 1.7% after the correction device is not added, cutting accuracy has been improved.(2) The rewinding process in tension is too large to cause finally re rolled edge collapse, the tension is too small easy to cause prepreg narrowband deviating from a conveying and thus affecting the efficiency of automation. Analysis of the tension effect on the quality of cutting and rewinding quality. A closed loop tension control system composed of potentiometer, servo motor and PLC controller is designed. In order to overcome the tension fluctuation range, the control model is uncertain, the precise control of the complex winding tension is achieved, and the fuzzy PID control algorithm is adopted in the system. By means of the fuzzy partition of input and output, the design of fuzzy PID control rules, the output of the output quantity is clear, and the control parameters of PID are obtained. The control results show that the tension control system is fast and the control is stable. The final quality has been improved.(3)The new features of 16 tow prepreg tape slitting and rewinding machine include: 1) 16 tow prepreg tape slitting and rewinding. 2) PE film tension mechanical closed loop control. 3) Independent tension closed-loop control. 4) Precision correction. To meet the requirements of the research of civil aircraft tail cone plate. Foundation for the development of tail cone.