Development process of virtual manufacturing of automobile panel mould
The virtual manufacturing development process of automotive cover moulds is shown in Figure 1. First, starting with product demand analysis, then conceptual design, and then from optimization design to system integration, through the use of relevant development software, in the virtual environment, the construction of product virtual model. This is a cyclical and gradual process. Based on the product development requirements, the corresponding simulation analysis tools are used to simulate and analyze the function and performance of the virtual model. The behavior of the virtual model is simulated and analyzed, and based on the results of the simulation analysis, it is built repeatedly. The simulation of the model ~ simulation analysis ~ model until the virtual manufacturing of the mold meets the expected design goals, began to physical production F1s7. It can be seen from Fig. 1 that the automobile cover mould has passed the virtual “real environment†inspection before it is put into production, and all the difficulties and design irrations that may be encountered in the actual manufacturing are tested, and then the design work is made. The personnel are modified or redesigned until the entire manufacturing process is completed in a reasonable and smooth manner. This will not only shorten the product development cycle, reduce the company's research and development costs, but also improve the quality of the product.
Key Technologies in Virtual Manufacturing of Automobile Panel Dies
In the virtual manufacturing process of automobile panel moulds, there are many related technologies involved. The quality of any one of the technologies will affect the final quality of the mould, which is one of the reasons for the slow progress in the application of virtual manufacturing technology. Only each technology has a good application, and the virtual manufactured products can be consistent with the actual manufactured products, in order to achieve the purpose of reducing development costs, shortening development cycles, and improving mold quality. Among the more difficult and mastery technologies:
(1) Establishment of mathematical model Establishing a simple mathematical model that reflects the dynamic manufacturing process is the key to the application of virtual manufacturing technology in automotive panel molds.
   If the mathematical model is not reasonable, then the manufacturing process simulated in the virtual environment will be different from the actual manufacturing process, and the function of optimizing the mold design will not be achieved, thus failing to shorten the development cycle and reduce the development cost. Therefore, when using virtual manufacturing techniques to develop automotive cover molds, a reasonable mathematical model must be established. When establishing the mathematical model, it is necessary to carefully analyze the characteristics of the automobile panel mold, and find out the main influence factors according to the mold function and manufacturing requirements, and put forward reasonable assumptions. The established model must reflect all the functions and manufacturing relationships of the mold, including the relationship between the force of the mold surface and the force shape of the stamping part during work, so as to simulate the actual production relationship and predict the possible production. The problems that arise are optimized for design and manufacturing purposes.
(2) System integration and program evaluation are the basis for the preliminary work in the virtual manufacturing of automotive molds.
   System integration is an optimized integrated planning design that requires a lot of technical support, including computer software, hardware, operating system technology, database technology, network information, etc. It is necessary to consider the relationship between subsystems from a global perspective and study the various sub-systems. Interface relationship between systems. The goal of system integration is to achieve optimal overall performance, that is, all components and components can work together, and the whole system is a low-cost, high-efficiency, well-proportioned, scalable and maintainable system. However, for the average enterprise, the purchase of a complete software system for simulation analysis is a high-cost investment, and no professional personnel can not let these software play the most effective role.
Under the good realistic environment provided by the computer virtual manufacturing system, the staff can evaluate and modify the established virtual model. At this stage, the manufacturing process of the mold can be simulated to solve the feasibility and difficulty of the manufacture of each component; the assembly process of the mold can be simulated, and the connectivity and equipment between the components and the ease of operation can be solved; Virtual test, testing the production capacity and production quality of the mold through testing. In each of the various schemes, the ease of implementation, the cost, the length of time, and the length of time spent on each scheme are evaluated, and the optimal production scheme that best suits the production conditions is selected.
(3) Parallel engineering is essentially a systematic method of designing products and their components and related processes in an integrated and parallel manner.
   This approach requires product developers to work with others to consider all the factors from conception to product end-of-life throughout the lifecycle of the product, including quality, cost, schedule, and user requirements. Concurrent engineering emphasizes that all the work of all the staff is carried out at the same time, emphasizing the team work spirit, so everyone in the work chain has the right to review the designed products, and strive to make the designed products easier to process and easy to assemble. Easy to repair, lower manufacturing costs and shorter manufacturing cycle. In the initial stage of the virtual manufacturing engineering of automobile molds, it is necessary to consider the interconnection and interaction between the various parts of the virtual model from the overall structure and function of the automobile mold, and regard them as an organic whole to realize internal data. Sharing with resources can make the produced molds achieve the desired results. In the virtual manufacturing process of automobile molds, the work of each part is carried out in parallel by different staff members, but there are a large number of interdependencies in the functional activities of each part. It is necessary to ensure the smooth cooperation between the staff of each part. To realize the information exchange and sharing of group activities in a distributed environment, it is necessary to dynamically adjust and monitor the design process, provide a parallel design working environment, and ensure the smooth progress of parallel design. This is the key to shorten the development cycle of virtual manufacturing molds. The condition for the implementation of concurrent engineering is to have computer network systems and monitoring mediators who support all aspects of personnel working in parallel or even work in different places, so that information can be communicated, and conflicts can be found and communicated among designers in real time and online. An appropriate management mediator is an important piece of software in parallel engineering and the key to the smooth operation of concurrent engineering.
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