Application of Virtual Manufacturing Technology in the Development of New Electromechanical Products (3)

Virtual CNC technology

The machine tool settings and post-processing of the generated tool path are performed by the CAM software, which is customized in the format specified by the machine tool to generate an NC code that matches the specific machine tool. Virtual CNC technology is to use CNC machining simulation CNC software to test the cutting state of NC code with virtual CNC machine tool that completely simulates real machine tool. Users can vividly see the real-time machining process simulation to verify the correct tool path during machining. Sex, as well as whether the knife has overcut, whether the tool and the fixture and the machine tool collide. The more advanced virtual CNC system can also perform mechanical simulation to predict tool damage, tool vibration, and control cutting parameters through the dynamic mechanical properties of the cutting process, so as to optimize the cutting process. With virtual CNC machining, users can not only quickly master the operation process of CNC machine tools, but also reduce and avoid various errors in the real machining environment during the debugging process, especially the use of virtual machine tools instead of real machine tools for training, reducing costs. At the same time, you can get better training results.

Product data management

Product Data Management (PDM) is one of the important enabling conditions for virtual product development, and is the core function of virtual product development. Because the entire product development process will generate a lot of information, including the product, the digital model of the process, the continuous cycle of the model and related process information. Design participants include not only the manufacturer's design, process, manufacturing, assembly, etc., but also suppliers, partners, and customers. These people are often geographically dispersed and each uses different computer systems and different software tools to generate the various data needed throughout the product lifecycle, and these computer systems and software may be built on different network systems. . In this case, how to keep the data up-to-date and correct, and to be fully shared and effectively transmitted throughout the virtual enterprise, while protecting the data from intentional or unintentional damage. These are all issues that PDM needs to solve.

Concurrent engineering

Virtual product development is a method of product development, a manufacturing strategy, and parallel engineering is a philosophical approach that runs through the entire virtual product development process. It should be seen as a management strategy rather than a manufacturing strategy. For demand analysis, part modeling design, virtual assembly, finite element analysis, process planning, simulation processing and testing of virtual products, the process of considering the activity of the product throughout the life cycle is concurrent engineering; the customer is the first in virtual product development. Drivers, product design, manufacturing, analysis, testing, assembly, sales, maintenance and other professionals, as well as suppliers, partners and users involved in product development process is concurrent engineering; virtual product development through computer networks in different locations, different Collaboration between units and departments, and different professionals can also be considered as parallel projects. In short, the main objectives of virtual product development with concurrent engineering as a development mechanism are: improving product quality, shortening product development time and reducing development costs.

Software and hardware platform of virtual product development system

The virtual product development system enables an organic combination of hardware platforms and software platforms. Its hardware platform includes: computer (graphics workstation), network, virtual reality equipment (such as 3D sensors, headgear, glasses, etc.), graphics scanner, three-coordinate measuring instrument, plotter, printer, rapid prototyping machine, projector and so on. The virtual prototype of virtual mechanical and electrical products is expressed in a way that these devices can perceive. The software platform of the virtual product development system includes: market demand analysis software, 3D CAD software (including assembly and rendering modules), product innovation design tools, optimization design software, graphic data processing software, engineering database management software, planning OA software, CAPP software. , CAM software (including simulation module), CAE software, virtual CNC software, process monitoring software, PDM software, cost analysis software, CRM, SCM, ERP and other production supply chain management software, computer network operating system software.

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