The data in PDM manages the research of the model

One. Foreword product data manages (PDM) a be IT new field, it applies extensively at mechanical industry, electron industry, chemical industry industry, medicine industry to wait, in the strategic port with be had more and more principal in last few years. PDM is a kind of object-oriented information system, it is all information definitions the object, wait like attempt of documentation, project, relation, process and project. PDM uses these objects to develop information of product of the work up in the process and development process model to finish the method that technical information manages in the product. Be in so of PDM in carrying out, the most crucial one step is of business model build. Build data management model to use the object-oriented technology that build a model. The object is a substance that enclosed data and operation, data described the condition of the object, the operation mirrorred the interface form of object and outside, the label uses the object with other to undertake distinguishing. The model is people a kind when the objective target that character, chart, symbol, relation and hypostatic model description realise uses after thinking of pair of to consider and solve a variety of problems of the existence in objective world objective and real course are abstract simplify represent a form. When business model is being built in PDM, deciding all data objects and its attribute is the main job that builds a model, in addition have a definition to target concern even, these are data of the product in the enterprise and the information carrier that produce data. Develop a process as the product and arise stage by stage and data is perfected, every activity in product development process is OK and abstract the output data that computation of the classics after having certain data-in to be in, analysis and changeover generation answer, these are OK and abstract for process management. So data management model includes data object to manage object of model, relation to run model and process management model commonly 3 parts. 2. The administrative model of data object to most enterprise, the gather into one of computer science department that needs to use a lot of differring (lead plane, workstation, PC) come to what what need inside whole lifecycle produce a product with different computer software all sorts of data, and all of these computer science department and software are built likely still go up in different network system. Below this kind of circumstance, how to ensure these data always are mixed newly correct, and make these data can get inside the limits of whole industry share adequately, make sure data spares even at the same time intended or innocently destroy, these are the issues that data needs to solve in target management. Can be product information abstraction by tubal data kind, it includes business object and data boy or girl friend. Business object is the abstraction of a few targets that use in company business course, it is the object with familiar place of company business personnel, include documentation, component to wait, it is data logging more model. Data object generalized the current product data that appears in the enterprise specific target, include the attribute page of component and documentation, and as corresponding as component file. The abstraction such as storehouse of the personnel that has manage and be constituented be involveded to these business objects and data object, project, electron is constituent object. If the graph shows those who be PDM 1 times to be in charge of data kind classification model, the graph is shown 2 times to organize an object kind classification model. The lifecycle management of the runs the property that includes a boy or girl friend, object operation of product information object and object. The attribute of the object is the is used at classification and file data object information that comes out from the abstraction in data object, date of the author that pursues like the project, version, format. The operation of the object is apply at the object or a kind of function that is used by the object or changeover, the autograph that if personnel organizes the visit of pair of project attempts,attributive, project pursues is entered and sign, the change of project attempt condition. The pattern with be had definite with the file of object photograph correspondence and store area, the object can keep the applied document that any application software produce lay aside, if CAD file can be placed,arrive in object of graph of a CAD. The object should produce a lot of change in its lifecycle, be like version (data content) , position of attributive of the droit of data, visit, memory, in the different level of lifecycle, have diverse control demand to these change. In the lifecycle that pursues in the project for example, designing condition is the position that can alter a project exclusively to pursue, think when the architect this part drawing has been finished, can refer its, project attempt enters the state that need check, relevant press-corrector, standard checks personnel to will receive an announcement, acquire the property that pursues to this project temporarily, so that undertake checking to data, if pass an inspection, project attempt is entered treat batch of condition, be arrived to design condition by go back otherwise. Be in approval state already was entered after the part drawing of check condition is passed via examining and approve. If need to undertake changing to be in the part drawing that approves condition, so be about to produce a new revised edition this, this version will continue to begin to enter from design condition new round lifecycle circulates. Pursue medium in object lifecycle, the changes between condition passes pair of boy or girl friends refer an operation to be activationed, can suffer many sign mobile control. If there is a definition on condition changes,sign activity, the object that is referred enters next state automatically. Sign to was being defined mobile condition is transitional, sign only after agreeing, ability happening condition is transitional, otherwise the object is maintained in current condition or the position that are reached to appoint by go back. The administrative model of product information object is shown 3 times like the graph. 3. The product bag with current mixed technology contains the administrative model of relation object many component, the change of a component may affect the component of a lot of other and relevant documentation. And the iformation flow in the process is being developed in the product is much to, if the information of section of the market flows to product project division, arrive next design branch; Design branch, production branch and technical support branch are collateral the job, the problem feedback that encounter gives a design the department; Buy information and design data information to flow to supplier and partner; Product cost information flows to door of Ministry of finance. So much product information is relevant, the change of content of each share information and condition can is opposite the development process of whole product brings an influence, very be necessary to establish the connection between data object, the change of object of a data can be in through contacting report come on relevant data object to it. The concern that involves in real environment, like the dependence of spare parts and documentation the crossing-over relation between relation, spare parts, component is mixed child the assembly between component concerns etc. In object-oriented PDM system, the relation is regarded as an object to undertake handling likewise, the occasional object of the object kind between the connection definition of existence is relation object. 1.

To the relation the description of the object can include the following information: (Tropism of in the right way of 1) relation object, it has initial drop and end a point, initial drop and stop the dot can have 1 respectively or many data object. (Both sides of connective of 2) relation object can belong to same target kind, also can belong to different object kind. The both sides of relation object has respective meaning. For example, a component and a connection between the spare parts can convey for: The component has a part; It is OK also to should contact conversely expression is: The spare parts attributes a part. (3) relation object has property, if amount, unit reachs date of expiration,wait. (4) relation both sides is put in base comparing, base is the amount that shows the data object that is in relation one aspect of the matter can contain this relationship. The base of relation object is more man-to-man than having (1:1) , one pair many (1:N) , many pairs many (M:N) 3 kinds. For example: The relation of component and spare parts is M:NRelation, because a component can have many different parts, and a spare parts may attribute many different parts. (5) relation object has a relation to edit regular, if the one party in relation object is passed,edit namely, this regulation decides how to maintain original relationship, 4 kinds of regulation can choose namely changeless regulation, replace regulation and duplicate regulation, following plan institute are shown. 2. The classified relation object of relation object kind include parallel concern kind concern with administrative levels kind. (1) parallel concerns the relation points to kind of parallel relation both sides is equal, mirrorred the quits relation between the object or client - the supplier concerns. Parallel relation includes to depend on relation, version relation and crossing-over relation to wait. Depend on a relation to build in different object kind between, if serve as source object,cite object, so the target object that derives from source object is count a boy or girl friend. When products plan, the connection of product component object and its respective documentation object depends on a relation one kind namely. Version relation is built between the object, version is the different form of the object, version relation uses the dynamic variation of the object in describing a product to develop a process. Crossing-over relation is built between the object, express to be able to be replaced each other between product component. (2) administrative levels concerns the relation includes kind of arrangement successive relation and aggregate relation. Successive relation describes a boy or girl friend kind the include and accedes relation between, subclass acceded father kind data definition and method, the existence between subclass exclusive or the tie that intersect concerns. Successive relation can be divided again accede for sheet and accede more. Aggregate concern stated the administrative levels of the part between the object and whole concerns, the object of this kind of relation has the branch of component and assembly. In aggregate relation, from integral object can navigation arrives the object of its component. 4. Management of process of process management model uses definition and the primary process that control data manipulation, the data between the occasional activity of the person when main management undertakes operating to data when the user and person and activity is flowed to, and the activity that all things and data dog inside the lifecycle in a project. The product develops a process to build a model is to show to the product development process undertakes description, analysis is mixed recombine, its purpose is to the product development process undertakes optimizing, an optimized process means punctual information to deliver, reasonable resource configuration and efficient group organization. The product develops a process to build a model is the premise condition of management and process of control product development. The product develops process model to involve a product to develop each fields such as activity, organization, information, resource. The object that the process in PDM manages basically is to found, the product of information of modification digitlization product develops a process, process management need and data management are compositive. Data management is the management that points to pair of product information, process management is point to pair of product information generate a process to undertake manage and be controllinged, data and process are a product mutual couplet is department, impartible in developing a process two cut fields. The process management of PDM includes the lifecycle management of data object and working flow management, both and OK unified for project management. Include to withhold and dog to the management of data object lifecycle product from the concept development of design, product, production is made till the whole process that halts production all medium histories are recorded, and the processing measure that definition product must pass from a condition changes another position. Working flow management basically is be coordinated to the business flow of project group is being faced to undertake in the enterprise and control, ensure the security of the product data that forms during this. Working flow management differentiates a task for a certain number of stature tasks, at the same time corresponding to every task allocation personnel is mixed resource, of every stature task finish include to design, refer, examine and approve wait for measure, ability is released finally. Graph 6 described what the process manages to classification model, the task kind abstract all business object in process management. The project is for development and the provisionality organization that make a certain product or provide composition of some service institute. Processing of the product development in project management, order for goods, change model design and a few temporarily if the activity is fictitious the enterprise object that can regard the job as flow management. Project management includes two fields, it is project organization firstly, plan according to the characteristic of the project and project namely, around the project the personnel in reasonable organization project, manage all sorts of resource in the project and data effectively. Project management is process management and data management is compositive, project management can is opposite object kind the model undertakes handling. The project includes all come using to have project description and project pilot data, be like product folder, project folder and project group. There is product information description in product folder, as the progress of the project, more and more product technology documentation are deposited to come in. There is a project to describe information in project folder, and all sorts of data of the generation in item executive process, if project specification, process plans,wait with status report. The every stature task in project task is corresponding a corresponding job flows, every process has group of a project to finish, the member in can giving a project the group according to need allocates corresponding activity. It is project control secondly, dog around the project namely its plan, master each job current situation, so that have proper resource allocation and plan,adjust. The harmonious need that flows to the job is referenced the project calendar of each stature task, project controller must plan to manage a system to provide the start working of every activity and finishing time clearly with. When executive project manages, basis product structure defines task structure, the job that task structure wants the place in the project to carry out differentiates of administrative levels type child the task. The requirement that is aimed at a project defines relevant part, have concerned personnel again in group, build an user / the relation between user group and part. Set its task and duty in the light of the part, gift corresponding operation attributive. Be opposite at the same time of the project dog want have the aid of at certain administrative measure. 5. Sum up article key to be opposite product data and the administrative model that develop a process undertook study. Use be analysed object-orientedly and establish modular method, the target that established product data systematically runs a model; Analyse and built relation object to run a model; Management of the process in be aimed at PDM and data government market are debatable, offerred the frame model of project management. CNC Milling