The main task of the MES system is to control the process of intelligent manufacturing, which is the core of intelligent manufacturing. If an enterprise cannot collect information in a timely and accurate manner at the production execution level, and cannot organize, analyze, process and judge production information at a higher level, it will be difficult to effectively control the production equipment, manufacturing process and personnel deployment, and it will be difficult to implement the enterprise’s policies. Intelligent transformation. MES is closely related to production information collection, process design, scheduling management, production process, resource management and scheduling, and equipment scheduling. It is the core content of intelligent manufacturing construction.
1 Mes system introduction
MES (manufacturing execution system) was proposed by American AMR in the early 1990s. It aims to improve the management and control capabilities of the manufacturing process, link planned production with on-site management, and rationalize the entire production process through the MES information system. Configuration, so as to achieve the purpose of improving production efficiency. The equipment controlled by the MES system includes programmable controllers, two-dimensional codes, electromechanical equipment, sensors, testing instruments, industrial robots, CNC lathes, etc. The MES system uses accurate and real-time updated data to teach, initiate, respond and record workshop production activities, which can quickly respond to changes in production conditions, and then reduce non-value-added activities and improve efficiency. The manufacturing execution system can not only improve the rate of return on capital operations, but also help timely delivery, speed up inventory turnover, increase corporate profits, and increase capital utilization. MES provides key basic information of production activities between the enterprise and the supply chain through multi-channel information interaction. The manufacturing execution system has developed into a mature manufacturing enterprise production information integrated management and control system.
2 Introduction to Intelligent Manufacturing Concept
The intelligent manufacturing system is a human-machine integrated system composed of intelligent equipment and human experts. It emphasizes the adjustability and variability in the manufacturing process, uses the powerful computing power of computers to simulate the way of thinking of human experts, and conducts information collection, information sorting, information judgment and information decision-making in the production process, so as to achieve replacement in the production process Part of the purpose of human labor. 3 Application of manufacturing execution system in mold intelligent manufacturing
3.1 Analysis of the structure and characteristics of the manufacturing execution system of the intelligent mold manufacturing workshop
Manufacturing execution systems are used in many fields, and applications in different fields reflect some of the characteristics of this field. According to the different needs of related companies in various fields, the focus of MES application is also different. Although the application focus is different, the overall framework of the MES application is basically the same, that is, the mode of applying information management in the production process, collecting, analyzing and judging information throughout the production process, and finally making decisions based on the actual situation of the enterprise to achieve intelligent manufacturing the goal of. In the field of mold production, due to the unique mold shape and the difference in the number of mold production, there are great uncertainties in the allocation of raw materials, processes, equipment and personnel in the production process, which seriously affects the production process control of mold production.
In response to the above problems, this paper established a mold shop MES information management and control system in an enterprise, which includes project management, production management, material management and other functions, and also integrates relevant mainstream software such as CAD, CAM, CAE, and CAPP. The system features are as follows:
(1) Flexible configuration of multiple data acquisition technologies for the process flow can greatly reduce the cost of use.
(2) Comprehensive digital quantitative assessment and supervision, and rich real-time production performance assessment reports.
(3) Meet the requirements of the discrete process industry for full professional management and control of production, quality, equipment, and technology, support mass production, and fully control the processing process.
(4) Interface design is flexible, easy to realize automatic interface with production equipment, and easy to integrate with ERP system.
(5) The business evaluation rules can be configured according to the actual situation of the enterprise, and can be modified at will according to the needs of enterprise development.
(6) Information visualization management, simple operation and strong human-computer interaction.
(7) The dynamic rate of the machine exceeds 85%.
(8) Repetitive work is done through computer operations, and people only do creative work.
(9) The system interface is rich, easy to connect with other platforms, and can be deployed across platforms and clusters.
3.2 The main functions of the manufacturing execution system of the mold intelligent manufacturing workshop
The manufacturing execution system used in mold intelligent manufacturing mainly includes the following 9 functions:
(1) Quantitative data collection: quantify work tasks, upload quantitative indicators to the management platform through the MES system, and provide a reliable basis for platform data analysis. At the same time, establish an information collection system and a high-speed and reliable information transmission network at each workstation to transmit the collected production and processing data in real time to provide an effective basis for enterprise production control.
(2) Detailed process scheduling: MES actively adjusts the operating sequence of production equipment based on actual production requirements to prevent equipment from shelving. Set the production priority, set a reasonable production scheduling logic based on the various attributes of the product, and actively allocate the production process according to the process requirements to maximize the production power and equipment utilization. Deal with the problems of equipment use conflicts and unreasonable resource allocation in the production process, and save production time to the greatest extent.
(3) Workshop planning and scheduling management: The flexibility of production orders for mold companies determines the uncertainty of production. The MES system can modify the order processing plan in time according to the changes of daily orders, so as to achieve the purpose of flexible production.
(4) Machining correction: After the production and processing are completed, MES takes the initiative to measure the output mold, compares the measured value with the set reference value, and corrects the unqualified product. Through repeated measurement and Correction to meet the requirements of machining accuracy.
(5) Production process control: According to the digital information collected by the system, the production process is monitored in real time, and the current value is compared with the planned preset value to correct errors in time to avoid recurring problems in the production process. At the same time, the error is recorded for the reference of the equipment repair part.
(6) Human resource management: It can reflect the current working status of the employees in each operation in real time, and reflect the changes of job positions in time, providing a strong basis for the deployment of production arrangements. At the same time, it manages the attendance of various positions, automatically generates attendance reports, and provides reliable attendance data for the human resources department.
(7) Repair management: timely report the working status of each workstation equipment, timely record the equipment that needs to be repaired, and provide reference for the repair work plan for the repair part. The repair part can upload the repair plan of each device through MES to ensure the orderly production of the production part.
(8) Production resource management: Use QR code skills to control raw materials during the entire production process. Using RFID technology to record the whereabouts of production resources in each processing process by reading and writing smart chips. Fully manage the delivery and storage of materials to ensure the effective use of production resources in the production process.
(9) Document control: For most companies, production process documents are trade secrets. In order to avoid the disclosure of business secrets, the MES system organizes and categorizes process files at different levels by setting various permissions, and assigns them to various positions as needed, thereby ensuring the security of process files.
4 Conclusion
The use of MES system in intelligent production enterprises can assist enterprises to complete intelligent and refined management, reduce labor costs, and improve production efficiency. This is the development trend of intelligent production enterprises in the future. The intelligent production process is optimized through functions such as quantitative data collection, specific process scheduling, workshop plan and scheduling management, processing correction, and production process control. Therefore, the use of the production execution system has active implications for the development of smart production companies.
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