Due to the planned economic system and the economic impact of the shortage, the heavy machine industry has formed the “step-by-step†serial management that is unique to traditional enterprises and the mode of production and technology preparation based on Taiwanese products, which has seriously hindered the rapid response of enterprises to the market, and applied group parallelism. Engineering principles can effectively solve this problem. The core of group technology is to classify a variety of parts according to similarity criteria and scientifically organize technical preparation and production. The core of concurrent engineering is the crossover of multiple tasks. Combining these two basic principles and applying them forms the concept of group concurrent engineering. Process is the bridge between design and manufacturing, and plays an important role in the whole process of product formation and guiding manufacturing. Especially for large-scale complete sets (line) equipment, there are many types of products and the manufacturing cycle is short. It is necessary to work in groups and in parallel to produce according to schedule. The design information flows into the process department first, and the process department processes the input information, formulates the process specification, formulates the labor quota, and specifies the product logistics direction. For large-scale complete sets of products consisting of tens of thousands of parts, a group-parallel engineering principle is used to establish a process project responsibility system, and project managers are set up according to similar product classifications to participate in product design ahead of time, extending to manufacturing and on-site installation technical services. It is a new topic in the typical single piece production heavy machine industry. 1 The process of constructing the technology in parallel and the preparation of the basic process and status The current technical preparations of the state-owned large-scale heavy machinery enterprises (mainly concept design, component design, process design, assembly design) and technical services (manufacturing, on-site installation and debugging) basically belong to Serial "style. After the business order is issued, the task is assigned to the design department, the design is completed, the process is completed, the process is completed and the production is completed, the package is shipped, and then the distribution department organizes the design and process personnel to the user's site for installation and commissioning. Within the process department, technical preparation is also carried out by professional “serial†organizations. The scope of work is narrow and scattered, and the process problems cannot be concentrated, which limits the depth and breadth of the work. On the other hand, at the product manufacturing stage, the process department and the production workshop have the same process function. This kind of long-winding phenomenon causes: The rationality of the process documentation cannot be verified, and the development of the process technology is affected: Key technologies and key zero-component manufacturing technologies Lack of systemicity: It is difficult for enterprises to form independent industrial property rights in manufacturing technology: It cannot effectively guide the installation and commissioning on the spot. Construction of Product Team and Process Project Responsibility System The heavy machinery manufacturing industry has a wide range of products, which are broadly divided into more than ten types of equipment such as metallurgy, forging, mining, lifting, water conservancy, and chemical engineering. Each type of equipment is divided into dozens or even hundreds of single devices. Combine these devices into similar units and set up one or more process managers. Work on group-parallel principles, participate in product design and process technology preparation until manufacturing and later on-site installation services. The person in charge of the process project is generally borne by technical personnel with a high level of technology, broad knowledge, business ability and organizational coordination, and innovative thinking. 2 The management team of the process project responsibility system should follow the following principles when it comes to the construction and implementation of the project: Authoritative authority is the fundamental guarantee for the successful implementation of the group project in parallel. This authority is granted by the company management: The target principle must be enhanced. The rapid response capability of enterprises and the improvement of corporate reputation are the goals of the group concurrency project: Coordination Principles Enterprises should establish a coordination management mechanism to deal with conflicts between process project managers and personnel of various departments: Principles of Responsibility and Right of Business Enterprises should fully understand their responsibilities and right. 3 Advantages of Grouping and Concurrent Engineering Construction and Implementation Through grouping and concurrent engineering construction and implementation, the following disadvantages of the state-owned enterprises can be solved: The drawbacks of the serial operation of the design and process department are avoided, and the technical service of the product manufacturing and manufacturing process is from the process project. In the end, the responsible person has shortened the service flow and changed the phenomenon of multiple interfaces, overlapping duties, overlapping, and unclear responsibilities. Changing process technicians have long been engaged in single-piece or component process design, lack of understanding of the overall product, especially the overall concept of the product features, structural characteristics, action principles, etc., resulting in the process file "three properties" can not be guaranteed phenomenon. The dispersion of operations can be relatively centralized, and the economic rationality of product design can be advanced controlled and guided. The process plan of important products can be considered in advance. It avoids confusion of technical documents caused by long service, it is difficult to summarize process technology and technical improvement, and the phenomenon of proprietary industrial property and business Know-How cannot be formed. 4 Application examples of the process project responsibility system We will now give an example of the application of group concurrency engineering in Western Heavy Industries Group. In the product design phase, the responsible person for the process project participates in the review of the design proposal according to the “Relevant Rules for the Responsibilities of the Process and Design Technical Service Interface†formulated by the group company, and conducts a process review on the design drawings of key zero-components. In this process, we must consider the issues of processing, manufacturing, assembly, inspection, cost, quality, on-site installation, and so on, and work in parallel. Process technology preparation stage The process project leader uses group technology to classify similar parts and make uniform regulations. For similar products that have already been manufactured, whether the original process document review can be borrowed, modified or added can be used to make the process documents uniform and the working hours quota be consistent. For unmanufactured products, the process plan should be discussed together with the craftsman, and the important parts and components should be reviewed. The person in charge of the project is responsible for the technology of the grouped similar products. The technicians of each functional department are technically obeyed by the person in charge of the project, and the important parts of the process specification are reviewed or confirmed by the person in charge of the process. After the preparation of all the processes, the person in charge of the process will organize, classify and collect the important, special, and innovative process contents so that the verification can be implemented in the next step. The person in charge of the process project of the product production service stage is the general leader of the production technology service for this type of product. He has implemented centralized and unified management of manufacturing technology issues during the product manufacturing stage. The processing results of all problems should be written back to the person in charge of the process project, and the project leader should save the original data, and finally summarize the archives, and feedback the relevant information of product modification to the design department. In the product installation and commissioning stage, the special installation engineering department is responsible for the installation and commissioning of the product. The installation engineering department intervenes at the later stage of product manufacture and contacts the person in charge of the process project to understand the product structure characteristics and assembly conditions, and prepares them for installation and commissioning. The person in charge of the process project leads the technical team and calls the relevant personnel to participate in the operation. Technical Summary and Improvement Phase The process project leader will sort out the entire production process and installation and commissioning of the in-charge product, organize the process personnel to complete the process technology summary, incorporate the proven mature process into the factory standard or enter the typical process database. Summarize technological innovations and application results of new technologies and form corporate intellectual property rights. The group company applied the principle of group-parallel engineering and implemented the project responsibility system management. It has been applied on the WISCO 2250 and TISCO 1549 hot strip rolling mill projects for half a year with good results.
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