Manufacturing industry informatization: Be based on the compositive research of PDM platform CAD/CAPP/CAM

Js"></script> PDM is the compositive platform of CAD/CAPP/CAM, the article is on the foundation of compositive analysis, discussed 3 kinds of compositive mode and the network development to PDM to undertake expectation. Introductive &nb Sp; changes prompt market demand for comfortable meet an emergency, to enhance competition ability, contemporary production company must realize TQCS, namely with the fastest appear on the market speed (T, Time To Market) , best quality (Q, Quality) , lowermost cost (C, Cost) , best service (S, the demand that Service) will come to satisfy different customer. Meanwhile, IT obtained rapid development, especially computer technology, computer network technology, information processing technology obtained people expect to be less than progress. The practice that comes more than 20 years proves, apply IT at manufacturing industry, undertake those who pass all manufacturing industry transform, it is the only way that modern manufacturing industry develops. And the powerful tool that uses the new technology such as CAM of ／ of CAD ／ CAPP successfully to become an enterprise to develop new product, make the development cycle of new product develops develops a few kinds a few years to now by the past, brought huge economy and social benefit to the enterprise. Current, already had system of the commercial CAD with a lot of good performance, CAPP, CAM. These independent systems part to designed automation and respect of automation of data process designing to have main effect in products plan automation, process. But, use the system of these respective independence, the automation of information is delivered between implementation system and cannot exchange. New technology is applied produced new contradiction randomly, the relations of production that original administrative system place represents already cannot get used to the requirement of new technology, regard Gu island intelligence as the technology, each side that produce from the enterprise only will improve efficiency, the effect is finite. The industry should improve efficiency from whole, improve a technology, optimize management, reduce cost, must use computer network to assist all sorts of computers the technology compositive rise, the information that builds a company level is compositive system, such ability from go up at all those who change an enterprise to have manufacturing government is inefficient, of the technical progress that promotes a business at the same time and personnel quality rise, realize double bumper harvest of economy and social benefit. 1, the compositive platform PDM that PDM is CAD/CAPP/CAP is one uses government all information related to the product (include file of archives of spare parts, configuration, graph, CAD, structure, attributive to wait) with all processes related to the product (include working technological process, change technological process etc. It designs product data effectively from the concept, design of computational analysis, detailed design, course, treatment is made, till its are reached inside the whole lifecycle of product die out,experiment test and verify, sale is safeguarded the relevant data of each phase, try according to definite mathematical pattern definition, organization and management, make product data is in its agree inside whole lifecycle, newest, share and safe. It provides the information management of product complete lifecycle, the design that is a product in the enterprise and make built to run paralell the synergic environment that change. PDM regards the information of engineering field as compositive frame, it manages for product data and process, change to run paralell those who be system of CAM of ／ of CAD ／ CAPP is products plan, compositive provided the necessary environment that prop up. Current, PDM system is best 3C compositive platform. It can consolidate the information that concerns with the product management rises, press information different utility classify ground to have the government of in an orderly way. Different CAD/CAPP/CAM system can collect the information that needs severally from inside PDM, again result replace PDM in, realize 3C truly thereby compositive. 2, because the compositive analysis of CAD/CAPP/CAM and PDM is in in an enterprise, the likelihood is put in the CAD with different move, CAPP, CAM system or the different version of these systems, the product model information that is stored possibly also between business of these systems and supplier, different collaboration is exchanged, put possibly still in the much data that generates by CAD/CAPP/CAM system everyday and documentation at the same time. In so complex environment, PDM serves as compositive platform, want to provide data management and the environment that work in coordination for CAD/CAPP/CAM system on one hand, be CAD/CAPP/CAM even at the same time move provide support. The assembly between component of list of the major attribute of the 2 dimension blueprint that CAD system produces, three-dimensional model, component, product, product concerns, product data version and its condition, need is handed in will manage by PDM system, and CAD system also needs to get a design from PDM system blueprint of parameter of assignment certificate, technology, original component, data and change the message such as the requirement. The craft information that CAPP system produces, ask like clamping apparatus of situation of craft course, working procedure, labor, tool and the modification opinion to the design, hand in undertake administrative by PDM, and CAPP also needs to get product model information, raw material information, equipment resource information to wait from inside PDM system. The knife that CAM produces his code of file, NC is handed in by PDM management, get product model information, craft information to wait from PDM system at the same time. 2.

1What CAD becomes minute of analyse CAD and PDM with the collect of PDM is compositive it is specific the one annulus that in carrying out, asks highest, difficulty is the greatest. The consistency that its key depends on needing to make sure the data in the data change of CAD and PDM varies. From user consideration, of CAD and PDM compositive should achieve real tight market to become. The application of CAD and PDM encloses the article that solved CAD generation only to block administrative issue. List of component description attribute, product needs to exchange PDM through interface. In the meantime, pass interface to exchange, realize the two-way asynchronous exchange of afore-mentioned data between PDM and CAD system. But, this kind of exchange still cannot assure interface data completely the consistency in CAD and PDM. Want to solve this one problem truly so, must realize the tight market between CAD and PDM to become, reach build between CAD and PDM share product data model, realize each other operation, the interactive sex of the modification in the modification in assuring CAD and PDM and consistency, accomplish two-way and synchronous consistency truly. 2.

2The compositive analysis of CAPP and PDM communicates besides documentation between CAPP and PDM get equipment resource information, raw material information to wait from inside PDM system even. And the craft information that CAPP produces also needs to be divided into main unit to deposit in craft information library. So the compositive need between CAPP and PDM accepts a trade, reach the foundation that encloses in implementation application to go up, further development information exchanges interface, make CAPP system can pass interface to get the support of information of equipment resource, raw material directly from inside PDM, in passing the craft information that its produce interface to deposit the craft information library at PDM directly. 2.

3Because the compositive analysis of CAM and PDM has a knife only between CAM and PDM system the communication of the documentation information such as model of code of file, NC, product, application is used to enclose the compositive requirement of OK and contented both between CAM and PDM. 3, the compositive pattern that the compositive mode of CAM of ／ of CAD ／ CAPP that is based on PDM platform lays CAM of ／ of CAD ／ CAPP in PDM platform basically has 3 kinds: 3.

The 1 content that encloses mode includes to use tool itself and the document that produce by these applied tools two respects, reach PDM to want a canal to rise to this two respects. Enclose the independent character that can make data and operation have unified model interface and logic. As a compositive platform, PDM has CAM of pair of ／ of CAD ／ CAPP enclose ability, enclose a gender to provide the function that uses changeover to another kind of application from a kind to its. When PDM system encloses CAM of ／ of CAD ／ CAPP, in system of the OK and direct activation is corresponding CAD in PDM system, CAPP, CAM, make information can come true to share between different 3C system, the data that generates to them undertakes unity administrative, show in file of graph of PDM system lieutenant general for corresponding actual figure; Same, also can enter PDM system directly in 3C system, undertake corresponding data management is operated, and need not quit original system, enter another system afresh. For example: After system of CAD of a 2 dimension is installed by cent, can check this tool object to start it directly in PDM system, undertake designing plot next, after the design ends, obtains graphical document can store automatically in PDM system and manage. If need to undertake modification to the graph, can find this graph document in PDM system, use a mouse to be able to start system of CAD of this 2 dimension, undertake the graph is revised. Enclose mode to be able to satisfy all data that generate with file form to use systematic requirement. Namely the file whole that PDM can manage applied system to arise only, and cannot visit a database directly, be like feature, parameter and assemble data to wait. Accordingly, enclose the specific data that cannot handle file interior, and the product structure of PDM and the structure that configure module to must understand product interior concern, so, PDM system cannot use enclosed pattern to this kind of information, must apply interface to exchange or the system becomes two kinds of different pattern closely thick and fast. 3.

Pattern of trade of interface of program of pattern of 2 interface trade is a kind more compositive than enclosing rate of more close together, automation is higher, need not the compositive mode that the user participates in directly, the data model that it needs to share between an applied system and PDM system is draw-out come out, the whole that defines it to PDM goes in the model, such, there was centralized data structure between PDM and applied system. PDM can with 3C data of implementation file interior is automatic between the system exchange. This kind of compositive characteristic is: On the foundation that encloses in application, below the guidance that shares data model between applied system and PDM system, exchange interface through data, the certain data object of implementation application system establishs PDM system automatically in, or the certain data boy or girl friend that from inside PDM system extraction application system needs, make both maintains asynchronous to agree. For example: The software of 2 dimension graph in products plan cannot be generated assemble a tree, and although software of three-dimensional and hypostatic modelling can generate the assembly of the product to cultivate, but with the product structure in PDM the tree has nothing to do, the product structure tree in such PDM still often needs manual staff. To realize PDM medium product structure is cultivated by the assembly in 3C system the tree is generated automatically, extract newest product construction concern from PDM, the assembly that goes revising 3C file, keep both the data consistency between, will finish through program of work out interface. PDM regards a kind of current management that can support a variety of CAD software as platform, use data information interface of the standard, establish the product structure of PDM and the connection between a variety of CAD software. Such, in interface development process, want to understand product structure to organize a form mediumly in CAD system already, also want to know the constituent form in PDM system, had made two-way transition next. 3.

3 tight market become the target that the company place that is every executive PDM expects closely thick and fast into mode, in this kind compositive means falls, different application became the organic component of PDM system, data can be shared not only between them, still can share operation service, PDM has the trade that provides full automatic two-way and pertinent information to the information of all sorts of types, include product information, feature information, parameter and the news that face applied object to wait. In 3C all PDM functions can be used on systems of each Gu island technology, make the user works in the systematic environment in unified definition, realize unifinication truly. When application becomes pattern closely thick and fast, the product structure information of the graphical information that needs labor 3C and PDM, make the structural concern between unified product data, such, when among them concern of a construction produces change, criterion another each is moved undertake adjustment subsequently, the assembly that maintains 3C from beginning to end thereby the consistency of the product structure of relation and PDM. 4, network makes the PDM that faces network to make be called to disperse again network is made, be made adroitly or be based on the production of Internet, it is a kind of concept that answers the market quickly, it moves alliance to come true through building around the market opportunity with new move. As the development of the computer, communication and IT, more and more enterprises used contemporary company network, appeared to be a center with Web, use TCP/IP, HTTP to be transmission agreement, client end visits the architecture of Web server and the database that are linked together with Web server through the browser. Network is made is to cross the orgnaization, whole world enterprise that crosses a region to organize means, this accedes with respect to requirement enterprise the PDM of environmental platform, break through the limitation of single company limits, the process that for the information of core from the product compositive change becomes the complete lifecycle with the product to be core is compositive, realize alliance of network industry trends then, reach an industry between compositive, and this kind compositive be trends, temporarily, it arises as the generation of market opportunity, as the die out of market opportunity die out. Such, the PDM that faces network to make and traditional PDM have very big distinction. Accordingly, PDM wants to be able to get used to the applied demand of the enterprise, maintain powerful vitality, must use advanced network technology, database technology, Web technology to wait, raise the information management of the enterprise a new standard. 5, conclusion PDM is to build the compositive platform on relation database foundation, share a database to be a center with, can span operating system platform and application software platform, the information that can realize much platform is compositive. Build the CAD/CAPP ／ CAM on PDM compositive system, made full use of its compositive to data and software characteristic, became an enterprise to realize the indispensable environmental platform with compositive information already, as the development of the computer and network, the complex environment that network creates raised new requirement again to PDM, the PDM system that builds network to make will become the heat that studies next. CNC Milling