A 'circuitry' approach to tolerance charting. (4th August 2014)

• Record Type: Journal Article
• Authors: Ngoi, B.K.A.; Lee, Y.P
• Is Part Of: International journal of computer applications technology. Volume 11:Number 1/2(1998)
• Page Start: 1
• Page End: 10
• Publication Date: 2014-08-04
• Subjects: tolerance balancing -- tolerance charts -- tolerance optimisation -- mathematical modelling -- path tracing model -- tolerances -- tolerancing -- Gaussian elimination -- working dimensions; Technology -- Data processing -- Periodicals; 620.00285
• Languages: English
• ISSNs: 0952-8091

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.