Compositive the research that changes CAPP and implementation

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One, foreword computer assists craft to design (CAPP) is to point to certain decision-making tie condition and given the mobile process that the design that needs to obtain below resource asks and designs treatment technology, its purpose is the treatment process that detailed ground chooses and change of decision general raw material becomes the part that gives a demand. As the development of CAPP technology, the technology of two respects gets increasing take seriously [1] : (The automation that the compositive technology craft of 1)CAD and CAPP designs needs as far as possible can from inside the product automatic and draw-out give spare parts information. But system of existing CAD merchandise cannot fulfil this kind of requirement directly, its biggest drawback depends on it cannot be over soil preparation the spare parts be machined the craft information of the face and be contacted effectively by treatment face itself. (2)CAPP and the division of technology of compositive technology products plan of production resource often are not familiar with the tie that production engineer encounters and resource. Because this causes technology design to cannot go on wheels, or increased to carry out cost. In the meantime, the executable sex of the CAPP system that severed production resource also is reduced subsequently. Compositive change CAPP market feature to build modular technology and the description of production resource at an organic whole, solve afore-mentioned problems effectively. The article basically studies compositive the technology design method in changing CAPP system and its system are formed. 2, compositive the academic basis that changes CAPP 1. The feature of spare parts model that the feature builds modular technology builds modular technology [2] with a view to conveys the technology with complete product and manufacturing government message better, serve to build the compositive information model of the product, make products plan works to undertake on higher administrative levels, the operand that designs staff is original line and body element no longer, however the functional element of the product. Diagnostic adduction makes intent of products plan personnel easier understand for technologist place and produce an organization, more the management that is helpful for procedure and change. In the meantime, the feature built modular technology to offer more convenient compositive port for the use of regular library and knowledge base. We assign the trait 3 kinds: Advocate feature, complementary feature, fictitious feature (the part is catenary of overall message, dimension, standard wait for) . Spare parts information is deposited with establishing look feature warehouse. 2. Production resource describes the inquiry that carries pair of production resource, the resource information that CAPP can go to the lavatory and gets craft designs place to need well and truly [3] . The analysis creates resource and the concern that craft designs, we think: (1) resource data is not pure use at systematic resource management to should be more art decision-making provide material data information, so the logistic structure of resource should accord with decision-making mode. (2) makes an environment include all sorts of hardware equipment resource not only, wait like machine tool, cutting tool, clamping apparatus, measure, still should include for decision-making the data resource that provides support, wait like dosage of mental allowance, cutting. (The treatment regulation library that 3) is Wu of catenary of choice feature technique and for craft the knowledge base of decision-making service has changeability, follow a technology improve and update, because this also is,make the one part of resource. 3, craft achieves set prescription standard compositive the main job principle that changes CAPP is: According to the structure of spare parts information that model of spare parts feature decides, the production resource below the decision-making logic that relies on systematic report and compositive environment makes spare parts technology. The resource that systematic place needs is offerred with the form of the database. And the technology knowledge base that all sorts of decision-making logic in technology design process stock opposite independence with decision-making and regular pattern. The craft of CAPPP achieves come true on two administrative levels [4] : It is craft grand design; 2 it is technology small design. The fundamental of CAPP sees a picture 1. The main content of grand design incorporates technology the choice of diagnostic technique catenary, choice of the equipment of affirmatory, machine tool of course of spare parts craft, mix according to goods lot type of machine tool equipment (common) of numerical control ／ , use working procedure concentration or dispersive principle, reasonable differentiate working procedure. Grand design can use technology to inference, also can use retrorse inference. The solution space that designs as a result of craft is larger, use more to inferential strategy. See a picture 2. Nextpage technology small design basically finishs tooling (cutting tool, clamping apparatus, measure) of the computation of dimension of choice, working procedure and cutting parameter affirmatory. The parameter of technology small design is obtained through the inquiry to making resource, but the tie of dimension of the technical properties as a result of machine tool equipment, geometry to parameter of tooling, cutting, because of this craft grand design also affects the result of technology small design. 4, what the system introduces CAPP system is compositive the trend that changing is CAPP development. The technology design method that article place introduces already was applied develop at institute of CIM of Shanghai traffic university 863 " compositive turn CAPP product " -- SIP system. This system is one offers supportive machinery part drawing to generate, the CAPP system that diagnostic definition, craft starts the compositive environment such as management of documentation of design, craft and production resource description. SIP system is comprised by 4 stature systems, see a picture 3. (Module of 1) initialization initialization also says production resource description and technology knowledge build a warehouse. It realizes the description of the resource of pair of specific production companies and technology knowledge, include: Library of regulation of dosage of hardware data library, semifinished product library, machine tool library, cutting tool library, clamping apparatus library, measure library, mental allowance library, cutting and man-hour library, treatment, decision-making knowledge base. (Definition of feature of 2) feature definition is in AU below OCAD environment, finish the extraction of the definition that has a feature to attempt of spare parts project and diagnostic parameter. This module has the function of scale process chart at the same time. (3) craft is designed ' this module completes procedure documentation generate. Considering the diverse demand of the user, this module makes an user undertake craft is generated starting type except allow, also craft of reservation retrieval type is generated and the handiwork of craft documentation writes kind. (4) information safeguards information design documentation to undertake inquiry retrieval, backup, installation is mixed with the spare parts information that at be opposite the properties in SIP system shows, production resource information, craft safeguard. CNC Milling CNC Machining