Study & Development Of Steel Tube's Measure, Weight, Stencil System

Steel tube is one of the metal material widely used in industry. To provide high quality products and stay competitive, steel tube manufacturers depend highly on the steel tube's measure, weight, stencil (MWS) system to apply quality control. This paper focuses on the design and development of an integrated MWS system, which has been implemented successful at Baotou Iron & Steel Group Co. Limited.In chapter 1, a comprehensive review of the current status of MWS system is provided and the necessity of developing integrated MWS system is stated. At the end of this chapter, the source of task is brief stated.In chapter 2, according to the design target of MWS system, some key design parameters as well as the manufacture flow are put forward. The framework of an integrated MWS system comprising subsystems of moving steel machine, measure, weight, stencil and control is presented, followed by a description of the subsystems' function and interaction.In chapter 3, the function, components and working principle of the measure subsystem are first introduced. A formula for the length of steel tube is derived based on the specific measure method employed. Based on detailed error analyses, both theoretical and experimental, result on the property of system error is provided.In chapter 4, after a description of the function, system composition and working of the weight subsystem, the assemble charts and design charts are given. The structure, type, orientation method, display instrument of the weight module are particular introduced. The error of weight system is discussed by analyzing the installation accuracy of weight module and the processing of weight signal. Experimental result is also presented. .Chapter 5 focuses on the design and development of the stencil subsystem. Both the design of the printer head, servo move system and electric control are described. The effect of stencil printing is illustrated at the end of this chapter.In chapter 6, the control software of the MWS system is designed employing Siemens S7-300PLC and WINCC. IDEFO modeling has been used in designing the control software. The chapter is finished with some snapshots of the control software in action.Chapter 7 is a brief summary. Possible further improvement of the integrated MWS system developed is also proposed.