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1 – 10 of over 19000As most existing computer‐aided design systems do not provide partfeature information which is essential for process planning, automaticpart feature recognition systems serve as…
Abstract
As most existing computer‐aided design systems do not provide part feature information which is essential for process planning, automatic part feature recognition systems serve as an important link between Computer Aided Design (CAD) and Computer Aided Process Planning (CAPP). Attempts to provide a structural framework for understanding various issues related to part feature recognition. Reviews previous work in the field of part feature recognition and classifies known feature recognition systems for the sake of updating information and future research. Briefly introduces about 12 systems. Studies 31 systems and lists them in the Appendix based on 60 references. Comments on future research directions.
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Today, due to the rapid change of manufacturing technology, manyfirms have to produce efficiently with minimum cost and best quality inorder to maintain their status in the…
Abstract
Today, due to the rapid change of manufacturing technology, many firms have to produce efficiently with minimum cost and best quality in order to maintain their status in the markets. Having invested a great deal of money in R&D the manufacturing environment is very competitive, using many advanced technologies such as computers, microelectronics, Computer‐Aided Design, Computer‐Aided Manufacturing, Flexible Manufacturing Systems and industrial robots. This means managers must acquire some technical knowledge and workers must be prepared to move from direct manufacturing to the information sector or to professional services because automation requires many professionals and technicians.
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G.J. Colquhoun, J.D. Gamble and R.W. Baines
International competition is driving manufacturing executives toplace an ever‐growing importance on the formulation of computerintegrated manufacturing (CIM) strategies as part of…
Abstract
International competition is driving manufacturing executives to place an ever‐growing importance on the formulation of computer integrated manufacturing (CIM) strategies as part of their corporate plans. Structured analysis and design techniques, in particular IDEF (Integrated Computer Aided Manufacturing definition method), are becoming a vital tool in the analysis and implementation of such CIM strategies. This article positively demonstrates the technique and its ability to model the link between design and manufacture in a CIM environment. The approach relates interdependencies of planning for manufacture, design and process planning within a CIM strategy. In particular it establishes the position of computer aided process planning (CAPP) in CIM architecture and evaluates a CAPP package as a potential element of a CIM strategy. The application to which IDEFo, in particular, has been used clearly demonstrates its usefulness to manufacturers as a powerful aid to the development of detailed CIM strategies.
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The batch process is dominant in manufacturing activity. It is, therefore, to be expected that much effort is being put into improving its efficiency. At least as important as the…
Abstract
The batch process is dominant in manufacturing activity. It is, therefore, to be expected that much effort is being put into improving its efficiency. At least as important as the type of advanced equipment now being installed is the organisation and management of the batch process. This article considers the extent to which certain aspects of Group Technology may be integrated with Computer Aided Design and Computer Aided Manufacturing to improve efficiency. Indications are given of the extent to which savings may be achieved in certain phases of the process.
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Osama Abdulhameed, Abdurahman Mushabab Al-Ahmari, Wadea Ameen and Syed Hammad Mian
Hybrid manufacturing technologies combining individual processes can be recognized as one of the most cogent developments in recent times. As a result of integrating additive…
Abstract
Purpose
Hybrid manufacturing technologies combining individual processes can be recognized as one of the most cogent developments in recent times. As a result of integrating additive, subtractive and inspection processes within a single system, the relative benefits of each process can be exploited. This collaboration uses the strength of the individual processes, while decreasing the shortcomings and broadening the application areas. Notwithstanding its numerous advantages, the implementation of hybrid technology is typically affected by the limited process planning methods. The process planning methods proficient at effectively using manufacturing sources for hybridization are notably restrictive. Hence, this paper aims to propose a computer-aided process planning system for hybrid additive, subtractive and inspection processes. A dynamic process plan has been developed, wherein an online process control with intelligent and autonomous characteristics, as well as the feedback from the inspection, is utilized.
Design/methodology/approach
In this research, a computer-aided process planning system for hybrid additive, subtractive and inspection process has been proposed. A framework based on the integration of three phases has been designed and implemented. The first phase has been developed for the generation of alternative plans or different scenarios depending on machining parameters, the amount of material to be added and removed in additive and subtractive manufacturing, etc. The primary objective in this phase has been to conduct set-up planning, process selection, process sequencing, selection of machine parameters, etc. The second phase is aimed at the identification of the optimum scenario or plan.
Findings
To accomplish this goal, economic models for additive and subtractive manufacturing were used. The objective of the third phase was to generate a dynamic process plan depending on the inspection feedback. For this purpose, a multi-agent system has been used. The multi-agent system has been used to achieve intelligence and autonomy of different phases.
Practical implications
A case study has been developed to test and validate the proposed algorithm and establish the performance of the proposed system.
Originality/value
The major contribution of this work is the novel dynamic computer-aided process planning system for the hybrid process. This hybrid process is not limited by the shortcomings of the constituent processes in terms of tool accessibility and support volume. It has been established that the hybrid process together with an appropriate computer-aided process plan provides an effective solution to accurately fabricate a variety of complex parts.
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The purpose of this paper is to investigate computer‐aided design (CAD) and computer‐aided engineering (CAE) as enablers of agile manufacturing (AM).
Abstract
Purpose
The purpose of this paper is to investigate computer‐aided design (CAD) and computer‐aided engineering (CAE) as enablers of agile manufacturing (AM).
Design/methodology/approach
Based on the literature review, the importance of technology integration enabling AM has been found. CAD technology has been used for modelling baseline product; CAE has been used for deriving optimized parameters; new designs have been derived.
Findings
The feasibility of CAD and CAE as enablers of AM has been ensured.
Research limitations/implications
The study has been conducted only in one automotive sprocket manufacturing organization.
Practical implications
The practical feasibility of generating new products through technology integration has been ensured.
Originality/value
Very little research has been reported on technology‐integrated AM practices. In this study, CAD and CAE have been used for enabling product development.
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Anthony Corbo and Brian H. Kleiner
The key word with respect to computer‐aided manufacturing is“speed”. Almost all new developments in this high‐tech fieldcentre on decreasing production time. First, the importance…
Abstract
The key word with respect to computer‐aided manufacturing is “speed”. Almost all new developments in this high‐tech field centre on decreasing production time. First, the importance of an up‐to‐date software program that will cut decision‐making time is shown. Next, DOS extenders for 386 based systems offer increased speed but can be expensive. Finally, the effects of new developments on the labourforce and labour unions are also compared. All of these related topics are clearly enhanced by real‐life examples.
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S. Vinodh, G. Sundararaj, S.R. Devadasan and D. Rajanayagam
This paper's aim is to examine the application feasibility of Computer Aided Design/Computer Aided Manufacturing (CAD/CAM) technologies for achieving agility in a typical…
Abstract
Purpose
This paper's aim is to examine the application feasibility of Computer Aided Design/Computer Aided Manufacturing (CAD/CAM) technologies for achieving agility in a typical manufacturing organization.
Design/methodology/approach
A literature study was conducted. It was found out that CAD/CAM technology is not fully utilised for achieving agility in certain traditional manufacturing sectors. An implementation study was conducted in an electronics switches manufacturing company to identify the causes of this insufficient utilisation. Finally, a feedback session was conducted to explore the practitioners' views of this research.
Findings
The outcome of this research indicated the feasibility of adopting CAD/CAM as a technology for infusing agility in contemporary manufacturing organisations.
Research limitations/implications
This research was conducted in only one electronics switches manufacturing company situated in India. This may lead to the impression that the findings from this research may not represent all manufacturing companies. However, the environment prevailing in the above company is similar to that prevailing in any other contemporary manufacturing organizations. Hence, the outcome of the research could represent other manufacturing organisations situated throughout the world.
Practical implications
The research reported in this paper has shown the way of adopting CAD/CAM as a technology for achieving agility and examined the hindrances that have to be overcome in future to integrate CAD/CAM in practical scenario.
Originality/value
Significant researches have been pursued in agile manufacturing and CAD/CAM fields. However, no researcher has attempted to examine the practicality of adopting CAD/CAM as a technology for infusing agility in practical scenario. Hence, this work is original and valuable.
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This article examines the impact of introducing computer technologyin just‐in‐time (JIT) systems. Literature review has generally supportedthe notion that introducing computers…
Abstract
This article examines the impact of introducing computer technology in just‐in‐time (JIT) systems. Literature review has generally supported the notion that introducing computers within JIT production systems may enhance productivity. Also, the productivity of a computer integrated manufacturing (CIM) system may be enhanced by integrating it with the just‐in‐time (JIT) production system. This integrated production system is called the computer integrated just‐in‐time (CIJIT) production system. This empirical study provides strong evidence that integration of CIM and JIT can significantly improve a firm′s productivity and competitiveness.
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This study presents a longitudinal analysis of patterns of investment in advanced manufacturing technologies (AMT) and financial performance. Investments in AMT from fifty…
Abstract
This study presents a longitudinal analysis of patterns of investment in advanced manufacturing technologies (AMT) and financial performance. Investments in AMT from fifty manufacturing plants in the metalworking industries are examined. Data was collected via mail surveys administered to fifty manufacturing plants at three separate data collection times: 1994, 1996, and 1998. This study seeks to fill a void in the area of technology management, which is comprised primarily of cross‐sectional studies that do not address the dynamic nature of investments in technology. The results suggest differences in the evolutionary profile of several technologies, including e‐mail, bar coding, robotics, and computer aided design. Further tests indicate that there is a positive relationship between many of these technologies and plant financial performance. Finally, the longitudinal data suggest that there is approximately a two‐year time lag between investment in technology and performance improvements.
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