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  • Tolerance charting  (4)
  • Optimisation  (2)
  • Graphical model  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Concurrent tolerance charting for component and assembly using “modified tree” approach (1997)
    Springer
    The international journal of advanced manufacturing technology 13 (1997), S. 729-737 
    Details
    ISSN: 1433-3015
    Keywords: Concurrent engineering ; Stack analysis ; Tolerance charting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The interaction between components in an assembly plays a major role in the performance and reliability of the assembly. However, in conventional design, the dimensions and tolerances of components are usually assigned intuitively to satisfy design constraints. Tolerance analysis is then performed to determine the critical tolerance accumulation that results from the assembly. The tolerances are then modified so that the interaction requirements are satisfied. This approach relies on the experience of the designers and the results may not be an optimum. This paper presents a direct method to determine the working dimensions and tolerances of components that allows control of the assembly interaction. The model is easy to construct and it provides a clear picture of the entire process and assembly links. Using the model, a set of linear equations is formulated directly based on the design constraints and interaction requirements. With appropriate constraints derived in terms of the process capabilities, the desired working dimensions and tolerances can be determined using LINDO, software for solving the linear programming problem. This approach allows the working dimensions and tolerances of all components in an assembly to be determined concurrently.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179073
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  • 2
    Electronic Resource
    Electronic Resource
    Optimising robot workcell layout (1996)
    Springer
    The international journal of advanced manufacturing technology 12 (1996), S. 377-385 
    Details
    ISSN: 1433-3015
    Keywords: Optimisation ; Robot workcell layout ; Spatial representation
    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 describes a heuristic algorithm for optimising the layout of a robot workcell. The algorithm attempts to minimise the total path of travel of a robot arm for a given sequence of operations by determining the relative positions and orientations of the stations in the workcell. A unique spatial representation system is used to model the shapes and orientation of the stations in the workcell. The representation is very flexible and can closely represent the shapes of many common types of peripheral machine encountered in a robot workcell. The algorithm has been implemented on an IBM compatible PC and the results obtained are promising.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179814
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  • 3
    Electronic Resource
    Electronic Resource
    Nonlinear optimisation in tolerance charts — A study of objective functions (1998)
    Springer
    The international journal of advanced manufacturing technology 14 (1998), S. 423-427 
    Details
    ISSN: 1433-3015
    Keywords: Nonlinear ; Objective function ; Optimisation ; Tolerance charts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract One of the main objectives in tolerance charting is to determine the working dimensions and tolerances at the lowest cost without violating the blueprint specifications. It is with this objective in mind that the authors present a comprehensive study of the effect of the choice of an objective function on the final manufacturing cost. Optimisation of the objective functions has been done using PROFORT (nonlinear optimisation). The paper deals with a single example, solved using two linear and a nonlinear objective function.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304621
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  • 4
    Electronic Resource
    Electronic Resource
    The Noded graph approach to stack analysis (1998)
    Springer
    The international journal of advanced manufacturing technology 14 (1998), S. 343-349 
    Details
    ISSN: 1433-3015
    Keywords: Geometric dimensioning and tolerancing ; Graphical model ; Stack analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The tolerance chart is a graphical method for representing the manufacturing dimensions of a workpiece or assembly, at all stages of its manufacture. The chart provides an intermediate control system of checks and balances to ensure that processing dimensions and tolerances will meet those specified on the print. Tolerance charts are generally used in studying the dimensional problems on individual parts. However, they have proved tedious in their application to assemblies. This paper presents a simple and systematic approach to the process of tolerance stack analysis. The “Noded graph” model is constructed, representing the given and the unknown dimensions. Links are then established, using the model, which help to formulate the stack path of interest into a linear equation. The equation is used to complete the tolerance stack analysis module. This will be explained using a variety of geometric dimensioning and tolerancing examples. In addition, it is simple and hence easy to practise and very logical.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01178913
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  • 5
    Electronic Resource
    Electronic Resource
    The apparent path tracing approach to tolerance charting (1998)
    Springer
    The international journal of advanced manufacturing technology 14 (1998), S. 580-587 
    Details
    ISSN: 1433-3015
    Keywords: Linear optimisation software ; Tolerance charting
    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 a simple and straightforward, expeditious and accurate approach towards tolerance charting. Its simplicity in logic and approach allows a newcomer in this field to quickly develop expertise in process tolerance charting. The approach is used in conjunction with linear optimisation software, LINDO, to determine the optimal dimensions and tolerances for the part that is being processed. An example is given to illustrate the approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01301702
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  • 6
    Electronic Resource
    Electronic Resource
    Graphical approach to tolerance charting—A “maze chart” method (1997)
    Springer
    The international journal of advanced manufacturing technology 13 (1997), S. 282-289 
    Details
    ISSN: 1433-3015
    Keywords: Graphical ; Maze chart ; Tolerance charting
    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 a simple graphical method to represent the process links between surface planes, and leads to ease in performing the validity of a process plan. The approach used the linear optimisation software, LINDO, to solve the respectively linear working dimension and manufacturing tolerance equations. An example is also included to illustrate the method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179610
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  • 7
    Electronic Resource
    Electronic Resource
    Product and process dimensioning and tolerancing techniques. A state-of-the-art review (1998)
    Springer
    The international journal of advanced manufacturing technology 14 (1998), S. 910-917 
    Details
    ISSN: 1433-3015
    Keywords: Process planning ; Product design ; Tolerance charting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Dimensioning and tolerancing are important engineering processes in the different phases of a product development cycle. The two main phases in a product cycle where dimensioning and tolerancing techniques are extensively employed are in the areas of product design and process planning. Tolerance and dimension assignment in both product design and process planning has an equally important role in keeping the production cost down and, hence, requires equal attention as far as research into these areas are concerned. Another important motivating factor for research is that manual dimension and tolerance assignment is often tedious, time-consuming and requires a considerable amount of skill and experience on the part of the engineer, resulting in inconsistencies and errors. Extensive research, in the area of dimensioning and tolerancing in both product design and process planning, has been carried out with the advancement in computers since the 1970s. The purpose of this paper is to review the state-of-the-art dimensioning and tolerancing techniques in both product design and process planning and explore the opportunities for future research in these areas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01179081
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