Improvement And Control Of Welding Quality In Cold Rolling Department Of Shougang Jingtang United Iron & Steel Co.,Ltd

To face the buyer's market and improve competitiveness, iron and steel enterprises have to well meet the product quality, cost, and delivery time demands, which essentially require the production equipment should operate smoothly. Therefore, it is a great challenge for equipment personnel to modify the backward equipment management model, and improve the technique and management level. TnPM(Total Normalized Productive Maintenance) is developed from TPM(Total Productive Maintenance) in China. TnPM aims at improving the Overall Equipment Effectiveness and Total Effective Efficiency of Production, by means of systematic maintenance strategy and employees' normalized behaviors. TnPM is an activity based on total staff participate in, not only maintenance staff, but also production staff.This thesis does research and analysis on the TnPM theory, by learning from successful TnPM actions. And then introduces TnPM activities and model in welder equipment maintenance of Shougang Jingtang United Iron & Steel Co., Ltd. Depend on the plant site to find the maintenance pattern, normalize operation and maintenance, evaluate effectiveness, and get continuous improvements. Make emphasis on the systematic design model of the welder maintenance, by maintenance pattern design, equipment state management, organization and optimization of maintenance resources, to normalize operation and maintenance behaviors.Based on the well kept welder equipment function and accuracy, 6Sigma activity is taken to investigate the welding process and improve the welding seam quality.Since the TnPM and 6Sigma actions are taken, the function and accuracy of the welder machine is kept, the operators work obviously better, and the lines are running smoothly, which contributes to the company.