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An Architecture of Computer Aided Process Planning System Integrated with Scheduling Using Decision Support System
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作者 Manish Kumar Sunil Rajotia 《厦门大学学报(自然科学版)》 CAS CSCD 北大核心 2002年第S1期200-201,共2页
Process planning and scheduling are two major plann in g and control activities that consume significant part of the lead-time, theref ore all attempts are being made to reduce lead-time by automating them. Compute r ... Process planning and scheduling are two major plann in g and control activities that consume significant part of the lead-time, theref ore all attempts are being made to reduce lead-time by automating them. Compute r Aided Process Planning (CAPP) is a step in this direction. Most of the existin g CAPP systems do not consider scheduling while generating a process plan. Sched uling is done separately after the process plan has been generated and therefore , it is possible that a process plan so generated is either not optimal or feasi ble from scheduling point of view. As process plans are generated without consid eration of job shop status, many problems arise within the manufacturing environ ment. Investigations have shown that 20%~30% of all process plans generated are not valid and have to be altered or suffer production delays when production sta rts. There is thus a major need for integration of scheduling with computer aide d process planning for generating more realistic process plans. In doing so, eff iciency of the manufacturing system as a whole is expected to improve. Decision support system performs many functions such as selection of machine too ls, cutting tools, sequencing of operations, determination of optimum cutting pa rameters and checking availability of machine tool before allocating any operati on to a machine tool. The process of transforming component data, process capabi lity and decision rules into computer readable format is still a major obstacle. This paper proposes architecture of a system, which integrates computer aided p rocess-planning system with scheduling using decision support system. A decisio n support system can be defined as " an interactive system that provides the use rs with easy access to decision models in order to support semi-structured or u nstructured decision making tasks". 展开更多
关键词 Scheduling Using Decision Support System An Architecture of computer aided process Planning System Integrated with
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MULTI-AGENT COMPUTER AIDED ASSEMBLY PROCESS PLANNING SYSTEM FOR SHIP HULL
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作者 Zhang Shijie Jing Shuang Shenyang Institute of Automation, Chinese Academy of Sciences 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2001年第1期57-61,共5页
A multi agent computer aided assembly process planning system (MCAAPP) for ship hull is presented. The system includes system framework, global facilitator, the macro agent structure, agent communication language, ag... A multi agent computer aided assembly process planning system (MCAAPP) for ship hull is presented. The system includes system framework, global facilitator, the macro agent structure, agent communication language, agent oriented programming language, knowledge representation and reasoning strategy. The system can produce the technological file and technological quota, which can satisfy the production needs of factory. 展开更多
关键词 MULTI AGENT Intelligent agent computer aided process planning Knowledge representation
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THCAPP: Computer Aided Process Planning System in an Integrated Environment
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作者 王先逵 刘成颖 +1 位作者 李志忠 张玉云 《Tsinghua Science and Technology》 SCIE EI CAS 1996年第2期119-123,共5页
THCAPP is a computer aided process planning system for non-rotational parts which runs in a CIMS (computer integrated manufacturing system ) environment at Tsinghua University. Its architecture is described in this pa... THCAPP is a computer aided process planning system for non-rotational parts which runs in a CIMS (computer integrated manufacturing system ) environment at Tsinghua University. Its architecture is described in this paper. Then its main functions and key techniques, including part modeling, generative process planning and integration with CAD (computer aided design) and CAM (computer aided manufacturing) ale discussed in detail. 展开更多
关键词 computer aided process Planning computer integrated manufacturing information integration
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A RECURSIVE GENERATIVE APPROACH IN OPTICAL PRISM CAPP
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作者 汪通悦 徐才千 +2 位作者 曾励 黄民双 陈进 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1999年第2期170-176,共7页
In this paper, the generative approach utilizes recursion to generate process sequence for a part, and then match detail procedure design and select process equipment. A set of recursive formulas are found. Finally ... In this paper, the generative approach utilizes recursion to generate process sequence for a part, and then match detail procedure design and select process equipment. A set of recursive formulas are found. Finally a complete process program is produced. The method is simple than that of the knowledge system, the artificial neural networks and variant approach computer aided process planning(VACAPP). 展开更多
关键词 optical prism computer aided process planning generative methods
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Machine tool selection based on fuzzy evaluation and optimization of cutting parameters
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作者 张保平 关世玺 +2 位作者 张博 王斌 田甜 《Journal of Measurement Science and Instrumentation》 CAS CSCD 2015年第4期384-389,共6页
The paper analyzes the factors influencing machine tool selection. By using fuzzy mathematics theory, we establish a theorietical model for optimal machine tool selection considering geometric features, clamping size,... The paper analyzes the factors influencing machine tool selection. By using fuzzy mathematics theory, we establish a theorietical model for optimal machine tool selection considering geometric features, clamping size, machining range, machining precision and surface roughness. By means of fuzzy comprehensive evaluation method, the membership degree of machine tool selection and the largest comprehensive evaluation index are determined. Then the reasonably automatic selection of machine tool is realized in the generative computer aided process planning (CAPP) system. Finally, the finite element model based on ABAQUS is established and the cutting process of machine tool is simulated. According to the theoretical and empirical cutting parameters and the curve of surface residual stress, the optimal cutting parameters can be determined. 展开更多
关键词 fuzzy evaluation machine selection computer aided process planning(CAPP) parameter optimization
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USE OF GENETIC ALGORITHMS TO SEQUENCE THE MACHINING OPERATIONS OF PARTS
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作者 王细洋 《Chinese Journal of Aeronautics》 SCIE EI CSCD 1998年第2期50-56,共7页
USEOFGENETICALGORITHMSTOSEQUENCETHEMACHININGOPERATIONSOFPARTSWANGXiyang(王细洋)(NanchangInstituteofAeronauticsT... USEOFGENETICALGORITHMSTOSEQUENCETHEMACHININGOPERATIONSOFPARTSWANGXiyang(王细洋)(NanchangInstituteofAeronauticsTechnology,330034,... 展开更多
关键词 computer aided process planning(CAPP) genetic algorithms expert system sequence of machining operations
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Expert,Neural and Fuzzy Systems in Process Planning
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作者 王先逵 刘成颖 《Tsinghua Science and Technology》 SCIE EI CAS 1999年第1期46-51,共6页
Computer aided process planning (CAPP) aims at improving efficiency, quality, and productivity in a manufacturing concern through reducing lead times and costs by utilizing better manufacturing practices thus improvin... Computer aided process planning (CAPP) aims at improving efficiency, quality, and productivity in a manufacturing concern through reducing lead times and costs by utilizing better manufacturing practices thus improving competitiveness in the market. CAPP attempts to capture the thoughts and methods of the experienced process planner. Variant systems are understandable, generative systems can plan new parts. Expert systems increase flexibility, fuzzy logic captures vague knowledge while neural networks learn. The combination of fuzzy, neural and expert system technologies is necessary to capture and utilize the process planning logic. A system that maintains the dependability and clarity of variant systems, is capable of planning new parts, and improves itself through learning is needed by industry. 展开更多
关键词 computer aided process planning (CAPP) variant system expert system fuzzy neural system INDUSTRY
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ANN-based Approaches for CAPP
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作者 王先逵 蒲建 +1 位作者 吴丹 许忠信 《Tsinghua Science and Technology》 SCIE EI CAS 1996年第2期130-133,共4页
Since existing computer aided process planning (CAPP) systems have shortcomings such as difficultknowledge-acquisition, low intelligence level, weak optimization capability, etc.the application of artificial neuralnet... Since existing computer aided process planning (CAPP) systems have shortcomings such as difficultknowledge-acquisition, low intelligence level, weak optimization capability, etc.the application of artificial neuralnetworks (ANN) may significantly increase CAPP capabilities.Since ANN is self-learning, ANN has remarkable advantages in representing and acquiring of technical knowledge (especially that which is difficult to symbolize). In addition, since many procedures in CAPP are essentially optimization, ANN's combinatorial optimization capability canbe very useful.Both of these aspects of applying ANN to CAPP are described using an example which deals with process planning for machining of mechanical components. 展开更多
关键词 computer aided process planning artificial neural networks combinatorial optimization
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Automatic Fixture Design for Non-rotational Parts Using Fuzzy Comprehensive Judgment Method
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作者 吴丹 王先逵 蒲建 《Tsinghua Science and Technology》 SCIE EI CAS 1997年第4期77-81,共5页
Automatic fixture design is a key link in computer aided process planning. The uncertainty in the selection of fixture design schemes necessitates the use of the fuzzy comprehensive judgment method to automatically se... Automatic fixture design is a key link in computer aided process planning. The uncertainty in the selection of fixture design schemes necessitates the use of the fuzzy comprehensive judgment method to automatically select an optimal fixture design. This paper reports on the development of a computer aided fixture design system for non rotational parts using the fuzzy comprehensive judgment method running in an integrated process planning environment. Several typical non rotational parts with complicated configurations are used to demonstrate the automatic fixture design system. 展开更多
关键词 computer aided process planning fixture design fuzzy comprehensive judgment
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