The crucial technology with the compositive CAD/CAM in network numerical control

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Summary: Introduced the characteristic of technology of network numerical control and structure to the point. Emphasize research to be in network numerical control the crucial technology with compositive CAD/CAM. The swift and violent development of IT and computer network technology, the ceaseless progress of production technology, C AD/CAM technology, changed way of the traditional design of the product, production and management thoroughly. Carry out a proof, net of couplet of numerical control machine tool, be being undertaken unity administrative making numerical control product line by central computer is to improve utilization rate of numerical control machine tool and sheet the efficient way of pre production labor productivity. In the meantime, on the foundation of network, make CAD/CAM and part of numerical control system an organic whole, photograph Internet, treatment of pilot group control is centered in the center of implementation. Current, had achieved in the hardware system of our country CAD/CAM practical the level that change, it is increasingly mature that the individual technology of CAD/CAM also is in, but CAD/CAM compositive system is far still did not achieve practical change level, accordingly, the compositive system that development is based on contented and network, modern production course is imperative. The characteristic of 1 network numerical control and structural network numerical control are current a burgeoning technology, it is with numerical control the advanced technique such as technology, communication technology, computer technology is a foundation, through the network the equipment that concerns with production process compositive rise, the concentration that realizes production workshop to make equipment controls management and device between, between equipment and superstratum computer, with other workshop, pass the information between international net and other company to exchange then. The system of the example of numerical control of a network is formed, it is compositive already system of system of real time communication, management of information of NC machine tool, graph is automatic the functional module such as process designing system. A system of perfect network numerical control is collect control of network of design of manufacturing management, technology, DNC is an organic whole, of the system compositive should make basic structure with functional collect, can undertake with other CAD/CAM system information is shared, have open type of architecture compositive change manufacturing management system. Can see from above, this system has CAD/CAM interface, accordingly, it offerred a condition for the development of CAD/CAM compositive system. The crucial technology development with 2 CAD/CAM compositive system is compositive the CAD/CAM system method that change has a lot of, wraparound rise, basically have the following 4 kinds: According to the actual condition of product and hardware equipment, develop the whole system such as appropriative CAD, CAD and CAM by the architect, include the design of rock-bottom graph and administrative system. Be based on the method of diagnostic identifying. Be based on the method that the feature devises. Be based on the method of STEP standard. Of CAD/CAM compositive needing a settlement problem above all is how complete and the information that describes a product reasonably, make the information between each module can be shared already, have again the smallest redundant. Be aimed at this one problem, settlement way is to build the relatively unified product model inside CAD/CAM limits, it is a foundation with this model, apply product data to exchange a technology, the data switch between implementation CAD, CAM and share. Accordingly, build unified product model to already made one of crucial technologies with compositive CAD/CAM. Additional, at present of CAD/CAM system compositive, basically realize data switch through the file. What transmit efficiency and system to improve data is compositive change rate, make sure consistency of data, dependability and data are shared between each system, should use project database to manage a system to manage compositive data, make undertake information is exchanged directly between each system, the CAD/CAM that realizes real significance to go up is compositive. Accordingly, compositive data management also is a crucial technology with CAD/CAM compositive system. Finally, CAD/CAM compositive need undertakes much data is exchanged, because this need has an unified product data,exchange a standard. Current, the commutative standard of internationalization just is aimed at geometrical graph, be like IGES, DXF. To whole products plan and the data switch of production process, still do not have uniform standard, often be the commutative agreement that software developer comes from personal regulation data according to product situation and soft hardware environment. The blemish on quality can appear when CAD model is being founded, cause sequel application to be like the problem of CAM respect. Some defective model is used in same system do not produce a problem, but should pass data to exchange is received by other domain and apply only, the problem can be exposed come out, and producing a problem to judge a mistake very hard again is to happen in where after all, must establish CAD model afresh sometimes. Because be in what what the model does in generation process " auxiliary geometry element " often be in sightless condition, after exchange, auxiliary geometry element and real product message are very difficult depart, accordingly, should be in before delivering a model, delete substance of all blame product geometry, do not withhold a variety of expression of this geometry substance in the model. Technology of automatic process designing basically solves technology of 3 automatic process designing to search contrail of differentiate of direction of slash, treatment, cutting tool automatically the function such as automatic compensation, it is a compositive when realize CAD/CAM main component. Plot inputs the DXF document that have a youthful look becomes, use the information that is based on a feature to establish modular method, get information of treatment substance feature from which. The system needs hypostatic geometrical information, store concerned feature information. According to these information, preliminary the outline that forms a part reachs his to form the develop between the element to attack relation. By its plot order deposits CAD plot substance in DXF file, have nothing to do orderly with treatment; And when be deleted in machining closed circuit or adding some substance, as a result of DXF file medium substance does not press the order that processes closed circuit to deposit, because this needs to press case of end points connection new sort, form treatment closed circuit. Such, make plot and treatment separate, when using AutoCAD to undertake the graph is inputted, need not care effective treatment order, simplified data inputs a process. When forming effective treatment contrail, the influence of the element such as direction of the character of sunken, punch that need considers to machine an object, treatment, compensation of cutting tool contrail decides in system of automatic process designing, try to adjust to machining a course basically, ability assures to machine precision. Outline of the workpiece in be being machined actually may be not smooth, the circumstance such as occurrence corner, pointed horn, cause easily collapse a problem such as horn, light locomotive trip, can add filter circular arc, make machine orbit round glide to cross, improve treatment efficiency thereby. The system presses treatment to have interpolation operation to each substance orderly, store treatment command in the file, send undertake machining from engine system, what realized CAD/CAM thereby is compositive. 4 conclusion accompany the ceaseless development of computer network technology, the CAD/CAM compositive system that is based on a network is the inevitable tendency that the technology develops. The network that uses Web technology compose to build to be based on distributed operation, graph to change user interface and database management to be an organic whole is helpful for making full use of enterprise already some hardware, share for the data between departmental door and resource offer fast channel, pass the information communication of Internet implementation and outside. Additional, CAD/CAM compositive technology is one of research heat on international, the development of CAD/CAM compositive system and application already made the modernization of science and technology that measures a country and one of main marks with modern industry. Quicken CAD/CAM compositive the only way that changing construction is reform of traditional manufacturing industry and development, accordingly, the research of the CAD/CAM compositive technology that is based on a network has far-reaching real sense. CNC Milling CNC Machining