Process Management of Customized Product Manufacturing for Steel Structures Steel structure manufacturing enterprises mainly according to orders, the process management of steel structure products is characterized by randomness and uncertainty of orders, simultaneous operation of multiple products and large volume of products. In this paper, the simultaneous production of customized steel products with similar process flow is divided into one class and put on one line for production during the technological process setted. As the components of customized products are large, we set up virtual libraries between processes, and the virtual libraries are divided into several subvirtual libraries to distinguish the components of customized products. In order to determine the processing sequence of parts, the rules of inputting and outgoing storage are set in the virtual library, In order to ensure the efficiency and normal operation of production, while selecting multiple indicators to supervise production, the process is divided into several steps to guide production. And a process management system is developed to manage the production process.

Development and Application of MES Based on Cloud Platform for Steel Structure Enterprises In recent years, manufacturing execution system (MES) has been widely used in the manufacturing industry. MES plays an important role in supporting enterprise workshop management. However, generalized MES cannot be applied well in steel structure enterprises due to the particularity and complexity of steel structure enterprises. This paper takes into account the production characteristics and needs of steel structure enterprises and an MES structure based on cyberphysical system (CPS) is proposed. This architecture includes the physical layer, the network layer and the application layer. The cloud platformbased MES system was applied to a steel structure enterprise in Changchun, China, and the functions of each module were introduced in detail. The MES can effectively improve the informatization level of the enterprise, creating a transparent, informative and intelligent production environment for steel structure enterprises. The developed MES can improve resource utilization, reduce enterprise costs, improve product quality, and lay the foundation for steel structure enterprises to found intelligent factories.