A STEPPER APPROACH TO TOLERANCE CHARTING

This paper presents a simplified approach of model construction direct ly from the process plan. With the model constructed, the relevant pro cess links between any two surfaces can be easily determined. Unlike o ther methods, it does not require transcribing the link information in to constraint equations. The formation of the constraint equations is made easier by direct read-out from the model. The constraint equation s can then be solved by using LINDO (a linear programming optimization software) to generate the working dimensions and tolerances. An examp le is included for illustration of the method presented.