Bent windowpane

Abstract

The invention relates to vehicle glazing, comprising at least one windowpane (1), which has a windowpane height from 900 mm to 1650 mm, an top upper edge (1c), an A-pillar edge (1e), a body edge (1f), and two rectangular surfaces A and B, wherein the surface A has an extent of 800 mm * 800 mm and the surface B has an extent of 1000 mm * 700 mm and surface A and surface B are centrally bounded by the lowest contact point (1a) of the windowpane (1) with the body edge (1f) horizontally with respect to the ground, and the lowest contact point (1a) and the point of the top upper edge (1c) at the shortest distance from the contact point (1a) form a Y0 axis and the points at the furthest distance with respect to the width of the windowpane (1) form a Z0 axis, wherein the windowpane (1) has a. vertical radii of curvature from 18 m to 2 m and horizontal radii of curvature from 10 m to 1.5 in the region of the surface A, b. vertical radii of curvature in the range from 18 m to 3 m and horizontal radii of curvature from 10 m to 0.8 m in the region of the surface B, c. the curvature of the windowpane (1) along Y0 at the boundary with the top upper edge (1c) corresponds to a first tangent (1b), wherein the first tangent forms an angle a (alpha) from -10 DEG to 15 DEG from the top surface (19), the curvature of the windowpane (1) at the boundary of the windowpane (1) with the A-pillar (1e) corresponds to a second tangent (1d), wherein the second tangent forms an angle beta from 28 DEG to 70 DEG from Z0.

Description

technical field [0001] The invention relates to a curved glass sheet and a method for its production. Background technique [0002] The development of a new motor vehicle is largely determined by design elements in addition to the equipment aspects. The significance of the design of the windshield increases here because of the larger, well-visible surface. In this respect, not only the appearance of the windshield but also the aspects of energy saving and environmental compatibility are important. Furthermore, a capable microprocessor and a CAD (Computer Aided Design) supported software package enable a large degree of matching and optimization of the windshield's air resistance. For this reason, modern windshields in motor vehicles have increasingly complex shapes. Vehicles in particular with very low fuel consumption, but also sports cars, place high demands on the geometry of the pane of glass and therefore also on the implementation of the necessary methods for bendin...

AI Technical Summary

Problems solved by technology

Adding to the difficulty, individual or subsequent bending processes cannot be combined arbitrarily

These factors clearly limit the possibility of achieving the pursued glass geometry

In particular, the combination of edge bending and face bending used to create complex geometries is very difficult to achieve

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