Incorporating Geometrical Tolerances and Processing Inaccuracy Into Dimensioning and Tolerancing

Abstract The geometrical tolerances and the processing inaccuracy have a great influence on dimensioning and tolerancing. However, it is quite difficult to integrate them into dimensioning and tolerancing. This paper presents a way in which geometrical tolerances and process inaccuracy can be taken into consideration. The distance between two surfaces is defined clearly. The relationship between distance tolerances, form errors and position errors is established. Different sources influencing a distance precision have been investigated. A model where geometrical tolerances and processing inaccuracy can be dealt with is proposed. This model closely approaches practice.