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  • 1
    Electronic Resource
    Electronic Resource
    A rule-based frame system for concurrent assembly machines (1996)
    Springer
    The international journal of advanced manufacturing technology 12 (1996), S. 370-376 
    Details
    ISSN: 1433-3015
    Keywords: Knowledge-based system ; Printed circuit board (PCB) assembly
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The aim of this research is to develop a rule-based frame system for printed circuit board (PCB) assembly to generate the component feeder arrangement and placement sequence for concurrent chip placement machines. A knowledge base of frames, assertions and rules are used in the methodology to solve the PCB assembly process of SMT components. The system has been implemented using an AI programming environment, GOLDWORKS®. A heuristic approach is used to minimize placement cycle time in PCB assembly. The objective of the solution method is to reduce theX-Y table displacement, movement and component feeder translation movement. Such a system is aimed at obtaining good solutions to the problem as illustrated by an example.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179813
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrasonic deburring (1997)
    Springer
    The international journal of advanced manufacturing technology 13 (1997), S. 333-341 
    Details
    ISSN: 1433-3015
    Keywords: Deburring ; Ultrasonic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Burrs are always present in metal cutting and moulding processes and removal of burrs has always been a difficult engineering problem. The removal of burrs from high-strength materials with generic features that have “blind” or difficult-to-access burrs have made many deburring processes useless. Although some processes such as electro-chemical and thermal energy deburring methods are able to perform well for this purpose, there are serious health and safety considerations. There are also other limitations such as the requirement for materials to be electrically conductive for electro-chemical methods. In this paper, the ultrasonic deburring process has been used and developed to deburr thick metallic and non-metallic burrs which previously could not be deburred. The ability of ultrasound to propagate through elastic media and the fact that it does not require any tooling makes this technique very useful to treat surfaces that are generic in nature and difficult to access.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01178253
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  • 3
    Electronic Resource
    Electronic Resource
    A tandem approach to selection of machinability data (1995)
    Springer
    The international journal of advanced manufacturing technology 10 (1995), S. 79-86 
    Details
    ISSN: 1433-3015
    Keywords: Machinability data ; Multipass optimisation ; Sequential quadratic programming
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract One drawback of current machinability data systems is the inability to accommodate technological changes. Existing schemes to optimise machinability data are too specific and rigid. This paper describes the development of a methodology for a more effective selection of machinability data. The methodology incorporates various techniques, such as expert systems and mathematical programming. The unique feature of this system is the way machinability data are handled to arrive at the most suitable solution. The system accepts a wide range of data, from the very complete and specific to the very general. The more detailed and specific the data set is, the more credible the results will be. The machinability data in the data banks are easily updated and improved using feedback data from current shop floor production. The process of obtaining solutions from these banks is regarded as flexible optimisation. This paper reports on the optimisation methodology for multipass turning operations. Longitudinal turning, facing, taper turning and contour turning have been considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179275
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  • 4
    Electronic Resource
    Electronic Resource
    Assessment of health hazards in production of printed paper packages (1998)
    Springer
    The international journal of advanced manufacturing technology 14 (1998), S. 376-384 
    Details
    ISSN: 1433-3015
    Keywords: Environmental policy ; Health hazard score ; Site specific prioritisation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper discusses the health hazards faced in a company which produces printed paper packaging. The analysis is based on three main production processes, namely, printing, plate-making and washing. The components in the emissions of these processes are broken down into their chemical compositions and given a hazard rating. The analytic hierarchy process in the health hazard scoring system is introduced to evaluate the level of hazard of each process to the environment. When the hazard level encountered in each process is known, the necessary precautions and measures can be taken.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01178918
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  • 5
    Electronic Resource
    Electronic Resource
    A Method for Green Process Planning in Electric Discharge Machining (1999)
    Springer
    The international journal of advanced manufacturing technology 15 (1999), S. 287-291 
    Details
    ISSN: 1433-3015
    Keywords: Key words.Electric discharge machining (EDM); Environmentally conscious manufacturing; Process planning
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In today’s industry, many manufacturing processes have been systematically and scientifically analysed with the aim of achieving maximum efficiency combined with economic manufacturing conditions. The usual practice of manufacturers was to focus on a single factor in decision-making, such as production and cost. Recently, green manufacturing has been playing an important role in reducing the waste produced from industrial activities. This is due to a growing awareness of the need for a balanced approach to industry objectives using environmentally friendly process planning. This paper presents a methodology for the multi-objective analysis of the electric discharge machining (EDM) processes. A utility function was employed to determine the utility levels of various dielectrics by integrating the factors involving time, energy, quality and weighted mass. Using the utility function, the process or material with the highest rating represents the condition with the best match of all the key factors. It will therefore give a more balanced result, leading to savings in resources, which helps in protecting the environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001700050068
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  • 6
    Electronic Resource
    Electronic Resource
    A cost-tolerance model for process sequence optimisation (1996)
    Springer
    The international journal of advanced manufacturing technology 12 (1996), S. 423-431 
    Details
    ISSN: 1433-3015
    Keywords: Natural spline model ; Process sequence ; Tolerance-cost relationship
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper concerns the modelling of cost-tolerance data for various manufacturing processes and the optimisation of process sequences based on minimum production cost. A natural spline model representing the cost-tolerance relationship is introduced. A methodology to optimise the process sequences is developed using an expert system approach. An example to illustrate the methodology and the optimisation model is presented
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186931
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  • 7
    Electronic Resource
    Electronic Resource
    Cost-tolerance relationships for non-traditional machining processes (1997)
    Springer
    The international journal of advanced manufacturing technology 13 (1997), S. 35-41 
    Details
    ISSN: 1433-3015
    Keywords: Cost-tolerance ; Electrical discharge wire machining ; Laser beam machining
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In recent years, non-traditional machining processes have been growing in popularity and their applications have continued to increase. However, very limited research work has been carried out to investigate their economic implications on tolerance allocation. This paper reports on cost-tolerance relationships for non-traditional processes, namely, electrical discharge wire machining and laser beam machining. Medium carbon steel plates are machined using the two processes to obtain cost-tolerance data which are fitted to various mathematical models. A third-degree polynomial function has been found which gives the most representative fit to the data obtained. An example is presented to illustrate the application and to compare the cost implication of the two machining processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179228
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  • 8
    Electronic Resource
    Electronic Resource
    Collision-free insertion of components on PCBs using spatial representation technique (1996)
    Springer
    The international journal of advanced manufacturing technology 11 (1996), S. 162-171 
    Details
    ISSN: 1433-3015
    Keywords: Collision-free ; PCB ; Spatial representation technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper presents the technique for checking collision of through-hole components during the machine insertion process on a printed circuit board (PCB). The spatial representation technique is used to represent the components and the mounting head of an insertion machine. An algorithm that simulates the insertion process is written to detect any collision of component and mounting head during the insertion process. When a collision is detected, the algorithm will attempt to avoid the collision by re-sequencing the components concerned. If resequencing does not avoid the collision, the algorithm will compute a minimum safe distance for the affected component. The algorithm can also detect component collision due to components' space overlapping each other and subsequently can provide the minimum safe distance. The required safe spacing is based on the type of mounting head or machine used. The algorithm is a useful and efficient tool that could be used during the PCB design stage. The effectiveness of the spatial representation technique has been demonstrated using the TDK VC-544R/AR insertion machine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01351321
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  • 9
    Electronic Resource
    Electronic Resource
    Process sequence optimization based on a new cost–tolerance model (1998)
    Springer
    Journal of intelligent manufacturing 9 (1998), S. 29-37 
    Details
    ISSN: 1572-8145
    Keywords: Extended spline model ; process sequence ; cost relationship ; stock allowance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Identification of the optimal production sequence and allocation of machining tolerance are important activities in process planning for reducing production cost. This paper presents an approach that is capable of determining the optimal production sequence and its optimal process tolerance to achieve the minimum production costs. A new mathematical model, representing the cost–tolerance relationships and showing significant accuracy improvement over existing models, is introduced to allocate process tolerance. Stock allowance constraints on the selected switching tolerance are also considered to yield practical solutions. A prototype system for hole-making components is used to verify and evaluate the effectiveness of the new approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008895224256
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  • 10
    Electronic Resource
    Electronic Resource
    Tool condition monitoring using reflectance of chip surface and neural network (2000)
    Springer
    Journal of intelligent manufacturing 11 (2000), S. 507-514 
    Details
    ISSN: 1572-8145
    Keywords: Tool condition monitoring ; reflectance of chip surface ; neural network
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A wide variety of tool condition monitoring techniques has been introduced in recent years. Among them, tool force monitoring, tool vibration monitoring and tool acoustics emission monitoring are the three most common indirect tool condition monitoring techniques. Using multiple intelligent sensors, these techniques are able to monitor tool condition with varying degrees of success. This paper presents a novel approach for the estimation of tool wear using the reflectance of cutting chip surface and a back propagation neural network. It postulates that the condition of a tool can be determined using the surface finish and color of a cutting chip. A series of experiments has been carried out. The experimental data obtained was used to train the back propagation neural network. Subsequently, the trained neural network was used to perform tool wear prediction. Results show that the prediction is in good agreement with the flank wear measured experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026583821221
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