CAPP is in CAD PDM is compositive medium application

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  • source:NODIE CNC Machining
Informatization drives industrialization is direction, also be reality, IT application development is rapid, the application of new technology, will make original application system rises greatly on function, function, the change that also brings understanding to go up necessarily and rise. Although CAPP system manages MRPII/ERP with products plan CAD and production closely related, be called to be products plan and the bridge that produce government. But did not solve accordingly as a result of compositive technology issue, departed CAPP is the system that industry technology branch uses independently, did not have the bridge effect of CAD and MRPII/ERP. The development of PDM technology, make product data management faces a product whole production process, call management of data of complete lifecycle product, this is business information compositive offerred a solution, also make CAPP and CAD/MRPII/ERP compositive become a possibility. One. In production company of the target that the computer assists craft to design and limits machinery, products plan is change user requirement into blueprint appearance and technical file, and with what method basis the resource of this factory (the) such as ability of technology of equipment, worker, labor, use social condition, will finish the product of blueprint appearance and technical file regulation, this is the duty of craft branch. Branch of production of battalion of already of look forward to is the manufacturing process that the craft file according to craft branch will come to to organize whole product, accordingly, craft file should coach concerned production management department organizes production already, the member that want directive workshop worker, identifier again has all sorts of operations. The development application that analyses CAPP according to above should fit our country's current national condition already, also want to consider the need of development, anything but can attend to one thing and lose another, more important what should be a system is compositive a good bridge action, prevent needless do poorly done work over again, for this should: (1) technology design is the fundamental message that direct company runs, should make company production is managed optimize, must optimize craft information above all, so CAPP must offer what company production manages to optimize, the craft information of standard, standard, produce for the enterprise, manage optimize run next dozen of bases. (2) is current 90 ％ return our country company is general accuracy machine tool, the development of CAPP must be outputted comfortable at the enterprise is at present artificial reading procedure, operation sheet or operation card. (3)CAPP not only provide information of spare parts craft, and provide product craft information: Include norm of craft course, material, man-hour norm and concerned craft file. (4)CAPP must provide technical information system and management information system (MRP - Ⅱ / ERP) place must the information inside machine, these information can accord with entire plant data of all of computer science department is shared, the requirement with compositive system. (5) as NC machine tool gain ground, CAPP besides provide information for NCP, what study CAD and CAPP even is compositive. (6)CAPP must be the need of GT treatment and FMC, FMS to provide information. 2. Craft information analyses the requirement according to software project, before undertaking the system is designed, must undertake detailed analysis to the information content of machining complex, just can study systematic structure further. Information theory tells us: Information analysis is from information the viewpoint sets out, will analyse an object according to news feature and mutual concern, understand thereby and announce its working mechanism; The analysis is the main method that meets research target, and information is comprehensive it is the method that studies the problem is solved. Undertake an analysis to the content of craft information and structure, it is the important step that knows craft news further. The face undertakes an analysis to craft information below. 1.

The primary technological process of craft information. Can seeing from inside craft information flow chart product information, enterprise produces organization, equipment and tooling worker technical condition is the input information of machining complex; The craft standard that all sorts of production is control technology office change and implementation are optimized -- security, dependability and socioeconomic assure; Norm of craft course, procedure, material, man-hour norm is the target information of output. Graph flow chart of 1 craft information 2.

The content １ of the information that machining complex handles) input information (1) product information. Include the product property information such as product name, model, norms, function and product, subassembly to pursue, data of structure of product, component; (Information of 2) spare parts. Include spare parts name, date (plan bugle call) reach hardware data, suttle wait for appearance of property information and function, geometry, dimension, precision, or encode of feature of input spare parts; (3) company production organizes information. Include to produce the constituent structure of system of type, production, the function of each production branch, outside synergic circumstance; (4) equipment reachs tool information. The norms of each equipment tool, function reachs configuration; (Circumstance of 5) worker technology and production are used to. 2) control information (1) semifinished product is made reach heat treatment standard. Include to cast, forging, the craft such as riveting solder and heat treatment is normative. (2) treatment craft and assemble a standard. The classification that includes to machine a spare parts is normative (into group standard) and norm of dosage of choice of machining order, machine tool, tool choice, semifinished product and mental allowance choice, cutting, man-hour and assemble craft to wait for a standard. 3) export information (1) craft course (the circuit that the spare parts makes) ; (2) procedure. Include working procedure order, machine tool, worker worker (clip, quantity) , the clip of dosage of treatment place, operation allowance, cutting and treatment, outfit, note in measuring, output working procedure card, process chart to wait when necessary; (3) material norm. The semifinished product surplus that includes a part, cut, collet, gross weight, norm, one base machines a number and overall material utilization factor to wait and product data norm. (4) man-hour norm. The preparation that includes a part and terminative, motor-driven, assist and use up naturally wait for man-hour and product man-hour norm (information of the tool that 5) presses collect of product, component, material, man-hour. 3.

Input the analysis of information: Products plan information and the analysis that craft information concerns, graph requesting an audience 2. Graph 2 products plan and craft design file of each phase technology, blueprint, data, concern 4.

Output the analysis of information: Craft information and the analysis that produce management information concern, graph requesting an audience 3. System of graph 3 CAPP is outputted art the concern that designs technical file and manufacturing management 3.

Enterprise informatization should undertake the analysis of information processing circumstance with the computer: 1.

The producibility of the products plan design that CAD system outputs to assure CAD system to the demand of CAPP system, when the design need understands workmanship ingredient, include level of technology of the method of semifinished product workmanship, treatment workmanship method, equipment that assembles technique, enterprise to make a workshop, area, tool, worker, raw material is supplied etc, the products plan that mastered these ability to make CAD system outputs only comes true (1) faces made design (DFM) : Below the premise that assures product function, function, consider tall productivity, stable high quality, low cost, good security, low labor intensity, clean production environment. Must consider to be purchased from raw material when the design, the whole process that semifinished product makes treatment. Element of above of the consideration when wanting to design only is OK: Cost reduces: 30 ％ of 20 ～ ; Amount of labor drops: 50 ％ . Realize DFM, need establishs design criterion and standard, undertake examine and verify, usable below CE environment CAD - the loop of CAPP will come true (the producibility) that evaluates CAD through CAPP. (2) faces constructional design (DFA) : In product production process, the labor power that has 1/3 left and right sides is engaged in the assembly of related goods, in industrialized country, assemble operating costs to occupy the 40 ％ above of overall operating costs, the purpose of DFA is to reduce use at constructional labor, decrease assemble operating costs, element of above of the consideration when wanting to design only is OK: Reduce amount of labor 73 ％ . Realize DFA but reduce two kinds of mode: .

Be based on easy outfit to match criterion, with DFA measure can assemble a gender to undertake grading to the spare parts, rise to be able to assemble a gender of the spare parts thereby. .

Use a series of design criterion, standard (originate design experience and assemble practice) will undertake design and examine and verify, call axiom to change a method. Also CAPP system undertakes craft designs indispensible consideration designs these factors that DFM/DFA place should settle, it is library of the technical data library with CAPP necessary system, technology natural resources, technique library that is to say (knowledge base) , wanted CAPP system to build these databases only, allow CAD system visit, with respect to the requirement that can satisfy CAD. 2.

CAPP and ERP ERP system are to use program of a group of computers to implement plan of company natural resources, the stock that will control a company with iformation flow flows with obtaining resource optimize use, because use computer program to carry out company natural resources to plan, need inputs primitive data, program ability moves, and ask primitive data standard is proper, the program cannot move or output data otherwise incorrect, cannot coach production, prep let alone optimizes manufacturing management. In the database that the technical document that in CAPP and ERP blame so compositive moving condition issues to must output CAPP to run ERP inputs ERP afresh, caused a large number of repetition to work, this also is the bottle diameter of moving ERP, alleged data of 7 minutes of 3 minutes of technologies, management, extremely. Graph the 4 comparison that are conventional technology file and requirement of information of file of the craft after executive ERP, because this is right,the data that Technical Division provides is watch of paper craft course no longer, procedure, material norm is expressed, man-hour norm watch, need the data in existence computer however, basically have the following kinds: .

Is ITEM(project defined) : ? Fang haze  fragrant  of Zhan of bully Shi garden denounces apricot discharge thoroughfaring children's hair to treat  of collect of ⑽ of Gu Jian of Huo rare ⑼ like that ⒉ of two of  of figured woven silk material of Huan of  of account of ひ of ü of  of ship of R of Qian of  of neon of Jian of an ancient small-mouthed wine vessel of ⑻ of bath of sell of  joint of bones checks order of ひ of  of  ⒘ languid, say for ITEM, with a group of code (ITEM NO) and its attribute data presentation. Graph 5 it is ITEM expresses main attribute data. .

Does ABOM(assemble stock detailed list) : ? ? of impossible of rostellum of ハ of Xi of Jing of bright  of Huo of Ba of Fang king crab falling into oblivion and the ABOM that design BOM to differ must describe the specific order that stock assembles, with the first step in directive ERP planning, . .

PROCESS(technical data) graph 6 it is PROCESS expresses main data. Graph the structure that the demand picture 5 ITEM of information of the craft after 4 executive ERP expresses database of 6 PROCESS of chart of main attribute data 3.

The bridge that the bridge that CAD/CAPP/PDM/ERP PDM is CAD and CAPP also is CAD/CAPP and ERP passes above analysis, CAD system and CAPP system mutual information requirement, must realize information to share, build an administrative system that shares information to make optimal plan for this, it is PDM system forms the objective basis with development, graph 7 it is PDM and CAD/CAPP relation, the bridge that explained PDM is CAD and CAPP also is the bridge of CAD/CAPP and ERP. Fasten related graph 7 PDM and CAD/CAPP each other 4. The relation of the application of PDM and CAPP system function, structure 1.

Much manual input information can be read from inside PDM database take. Be like information of property of product, component and product structure information, information of graph of product, component. 2.

CAPP system is OK the function of craft information collect that leave out is an unit with product, component and collect information. PDM system has function of powerful data processing, want CAPP system to provide fundamental information only, all sorts of data processing, system of PDM of output of forms for reporting statistics is achievable. 3.

CAPP system can provide eligible, normative craft information for MRPII/ERP through PDM. 4.

CAPP system can offer craft to design information for CAD system through PDM. 5.

CAPP system interior is compositive do not need to build warehouse of product technical data independently. If the data between module of norm of module of norm of craft course module, procedure module, material, man-hour is shared, completely OK PDM database undertakes data is exchanged. 6.

CAPP system does not need documentation data to govern a function. PDM documentation data managed a function to cover craft documentation data completely to govern a function. CNC Milling