| Off-The-Road tire undertakes the larger load and stress, and the tread and pattern have the different performance, when the tires are used on the different conditions such as: mine and building site etc. Because the upper layer of rubber for OTR tread has to contact with the ground directly, it is required to be featured with the nice abrasion resistance, prick resistance and fatigue & crack resistance in terms of designing. The lower layer of rubber for tread must be capable of enduring the bigger cutting stress, in particular on the shoulder, which is the section that undertakes the biggest stress, and is difficult to heat and cool up, therefore it is required to be characterized with nice heat-resistance, in order to keep the excellent physically mechanical performance at the higher temperature, as well as strong cut-resistance, high elasticity, low heating capacity and strong adhesiveness with cushion. The main requirement of sidewall is to keep the excellent yield-resistance and aging resistance. In other words, the rubber quality, structure and process determine the comprehensive performance of OTR tread in a great degree.Coming to the 21st century, with the rapidly development of highway traffic and mine industry, the demand of giant OTR tires increases continuously. Because the giant OTR tires are featured with big diameter, wide cross section and thick tread, the traditional application process cannot meet the normal production. In the meanwhile, the tread is difficult to be applied and transported manually, due to wide and thick cross section, as well as easily produce the air leakage, Therefore, developed a highly efficient, low-cost and meet the requirements of the domestic tire manufacturers the tread winding production line for giant OTR tire had very important practical significance.This paper mainly analyzes the basic principle of tread winding, as well as researches the advantage and disadvantage of the current winding type. Via comparison, aiming at the features of speed control system, such as non-linearity, polytrope, time lag, unmodeled dynamics and bonded disturbance etc., it designs adaptive fuzzy PID controller. In this case, based on the original PLC PID control function, add fuzzy control arithmetic, so as to realize the fuzzification of input, inquiry of fuzzy control sheet, fuzzification of output and adjustment of PID parameters; also aiming at the continuously precise positioning control in the process of winding, through electronic cam, realize the complicated profile of tread; as well as based on which, make out PLC program in order to realize the controlling method above mentioned. In comparison of the traditional winding mode, it reduces the scanning for base face before winding, so as to save the time for winding. Besides, due to scanning for base face not required, after winding, the profile of tread will be influenced little by previous process, with high repeatability. In order to ensure winding weight and profile precise, in the process of transferring strips, by servo control, the strip will stretch evenly, so as to guarantee the stability of strips before winding. I made out monitor screen of HMI through ROCKWELL based on RS-View of Factory Talk platform, so as to realize visualization, remote monitor and real-time monitor.According to the proposal above, research and develop the electrical control system of Giant OTR Tread Winding Machine. By passing the internal test and start-up, the weight controlling accuracy is within±1.5%; profile offset is within±2mm, as well as the air traps comply with process standard and the product has meet the requirement of customer. It has been put into production. |
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