Manufacturing method for lifting guide rail of side window glass of automobile

Abstract

The invention relates to a manufacturing method for a lifting guide rail of a piece of side window glass of an automobile. The method comprises the following steps: selecting a midpoint connected with any point on the glass to be applied for serving as a tangent plane of the glass; extracting the characteristic line of a column B; connecting the characteristic line into a straight line by taking the midpoint in the tangent plane as an original point, and forming a normal plane of the straight line on the midpoint; projecting the characteristic line on the normal plane to obtain a projection line, forming a circle by selecting any three points from the projection line, and forming a cylindrical face; changing included angles between the midpoint of the tangent plant and the straight line of the characteristic line as well as between the midpoint of the tangent plant and the characteristic line to make intersecting lines fit the characteristic line of a boundary virtual guide rail, which is opposite to the column B, of the glass, and forming a spiral line fitting the characteristic line of the column B; forming a spiral line of the same thread pitch on another boundary according to the previous spiral line, wherein the two spiral lines are taken as lifting lines of the glass; manufacturing the glass lifting guide rail according to the lifting lines.

Description

technical field [0001] The invention belongs to the field of car bodies, refers to the field of car window guide rails, and specifically refers to a method for manufacturing a single-curvature cylindrical guide rail of a helical line for lifting and lowering automobile side window glass. Background technique [0002] At present, the form of the side window glass of a car mostly adopts a double-curvature surface such as a torus or a drum surface due to the shape requirement. But because of its essential characteristics, the hyperboloid cannot make the helix of the cylindrical surface in the single curvature surface for the side window glass to realize the lifting of the glass. Therefore, when designing the side window glass guide rail, it is often necessary to rely on the double-curvature glass surface provided by the shape and then fit a single-curvature cylindrical surface according to the shape constraints, so as to obtain the helix required for the side window glass to ri...

AI Technical Summary

Problems solved by technology

[0006] 1. The front and rear guide rails cannot overlap well after projection, and they often cross together, resulting in inaccurate fitting of the cylindrical surface

[0007] 2. The adjustment of the plane has no reference adjustment guidance, which is not only time-consuming, but also the optimal solution is not easy to obtain

[0008] 3. The front guide rail and rear guide rail in the modeling stage cannot truly reflect the actual lifting state of the glass, and the obtained plan needs to be revised repeatedly

[0014] Since the fitted guide rail track is not a helical line, it will make the lifting uneven, resulting in excessive wear of the glass boundary and the wool groove

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