Angle vector analysis method for 2D (two dimensional) dimension chain

Abstract

The invention discloses an angle vector analysis method for a 2D dimension chain. Included angles consisting of the ring surface characteristics and non-ring surface characteristics in 3D data are directly measured to obtain angles, and then the angles are substituted into T0 / T1=cosa, so that the angle vector is obtained. The invention not only can effectively consider the influence of the included angles consisting of the ring tolerance zone and closed ring tolerance zone on the whole tolerance analysis result, but also can realize the measurement of the included angles conveniently, so that the accuracy and reasonability of dimension tolerance analysis are accordingly improved, and the tolerance distribution is finally ensured to meet the requirement of finished automobile assembly.

Description

technical field

[0001] The invention relates to a dimension chain angle vector analysis method, based on the field of mechanical precision design, in particular to a 2D dimension chain angle vector analysis method. Background technique

[0002] At present, dimensional engineering professional and dimensional design companies often ignore the angle between the closed ring and the direction of the component ring when calculating the 2D dimensional chain of the DTS area of ​​the vehicle appearance, and all of them are treated as 0°, resulting in inaccurate calculation results and resulting in calculation The result is not precise enough. In order to improve the accuracy of dimensional engineering tolerance analysis, it is necessary to design a method that can not only consider the angle vector, but also facilitate the measurement. Contents of the invention

[0003] In view of the deficiencies in the above-mentioned prior art, the present invention aims to provide a 2D dimens...