Design method of double-curvature door glass based on drum line theory

Abstract

The invention relates to a method for designing double-curvature automobile door glass on the basis of drum-shaped line theories. The method includes steps of (1), determining geometric input models according to characteristics of double-curvature glass and modeling A surfaces; (2), determining parameterized drum shaft positions according to the geometric input models; (3), determining contour lines of front and rear boundaries of glass surfaces according to characteristics of drum-shaped lines; (4), generating double-curvature glass surfaces by means of sweeping according to parameterized waist lines and the contour lines. The method has the advantages that the coincidence degrees of the double-curvature glass surfaces and the modeling A surfaces can be upgraded, interference between the double-curvature glass and automobile door accessories in lifting procedures can be reduced, and the movement stability and reliability can be improved; the traditional ring surface design models are improved, the drum shaft positions are optimized, the drum-shaped double-curvature glass is designed, accordingly, standard guidance effects can be realized, the method is favorable for improving the fitting precision and the movement quality of the double-curvature glass and reducing the failure rate and has high engineering practical value, and major requirements on improving the automobile body development capacity of the automobile industry can be met.

Description

technical field [0001] The invention relates to a double-curvature car door glass, in particular to a design method for a drum-shaped car door glass. technical background [0002] Today, with the rapid development of the automobile industry, the streamlined and aerodynamic requirements of the body are getting higher and higher. More and more cars use double-curvature side windows, and drum-shaped double-curvature side windows have become the main development direction of door glass. . In the traditional design process, the design of the door glass and its guidance system is a job that is highly dependent on the engineer's personal experience, and it no longer adapts to the rhythm of modern production in the fierce market competition. The design specification of the drum-shaped double-curvature side window has become a difficult point in the structural design of the car door. [0003] The horizontal and vertical curvature of double-curvature glass is greater than zero, so i...

AI Technical Summary

Problems solved by technology

However, there are two main problems in this method: the deviation between the fitted torus and the actual glass surface is too large, which cannot meet the engineering design accuracy requirements; the glass motion is unstable, and it is difficult to meet the aerodynamic requirements

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