A 'circuitry' approach to tolerance charting
by B.K.A. Ngoi, Y.P Lee
International Journal of Computer Applications in Technology (IJCAT), Vol. 11, No. 1/2, 1998

Abstract: The most critical step in a tolerance chart is to determine the various unknown working dimensions and their corresponding tolerances that are related to a particular blueprint dimension. The required algorithm in doing so in manual tolerance charting is both tedious and time-consuming. This paper presents a simple path tracing model that is used to achieve the above-mentioned. From this model, the unknown working dimensions and their corresponding blueprint dimensions are reduced to a set of linear equations. All the working dimensions can be easily solved by employing the Gauss elimination technique. Next, the tolerances are balanced using a separate mathematical model. As a result, the complete system is capable of solving all the unknown working dimensions involved in a machining process and obtaining their respective optimised tolerances.

Online publication date: Sun, 01-Jun-2014

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