Compensation Wedge for Vehicle Glazing Adhesive Bonding
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Solution Overview
Problem
Complex shapes of vehicle glazing, such as windshields and rear windows, lead to non-complementary orientations between the glazing and its support, causing the adhesive bead to shear during installation, which degrades the mechanical function and sealing of the bonding, especially in curved laminated glazing where deformation is limited.
Innovation Solution
A compensation wedge with a variable inclined surface is used between the glazing and its support to adjust the angle of the adhesive bead, ensuring it approaches the support surface perpendicularly, maintaining the adhesive's integrity and facilitating correct docking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the glazing has a complex curved shape to provide wider field of vision, then the field of vision is improved, but the adhesive bead undergoes significant shearing during installation which degrades bonding mechanical function and sealing
Solution Approach 1:
A compensation wedge is introduced as an intermediary element between the glazing and the rebate. This wedge has an inclined surface that compensates for the angular mismatch, allowing the adhesive bead to approach the rebate perpendicularly rather than at a high angle, thereby preventing shear deformation and maintaining bonding reliability
Solution Approach 2:
The compensation wedge changes the geometric parameters of the assembly by introducing an inclined surface with a specific angle that compensates for the angular difference between the curved glazing edge and the rebate, transforming the assembly geometry to achieve perpendicular adhesive approach
2Ease of operation
If the adhesive bead is deposited at a high angle to the rebate surface due to glazing shape, then the glazing can be installed, but the adhesive bead is subjected to significant shearing which degrades bonding
Solution Approach 1:
The compensation wedge serves as a mediator that modifies the assembly geometry, enabling the adhesive bead to approach the rebate perpendicularly. This eliminates the shearing effect that would otherwise occur during installation, maintaining both ease of operation and bonding strength
3Shape
If the bonding track is oriented at a significant angle with the general plane of the glazing, then the glazing shape can be accommodated, but the difficulty of molding and unmolding the glazing increases
Solution Approach 1:
The bonding system is segmented into three distinct components: the glazing, the compensation wedge, and the rebate. This segmentation allows the wedge to be a separate, easily moldable component with a simple inclined geometry, avoiding the complexity that would arise from trying to mold a single integrated bonding structure with angled tracks
Data Source
AI summary
The invention relates to a method for assembling a vehicle glazing (1) on its holder by gluing, in particular the windshield of a vehicle bodywork, said method comprising; applying a bead of glue (2) on the peripheral portion of the glazing (1) to be glued onto a reception rebate (3) defined by said holder; applying said glazing, substantially perpendicular to the average plane thereof, against said rebate (3) and pressing it for carrying out the gluing operation; characterised in that before applying the glue bead (2) on the periphery of the glazing (1), the method comprises gluing on the latter a compensation wedge (4) for receiving the glue bead (2), said compensation wedge (4) having a base surface (4a) provided opposite a lower surface of said glazing and an inclined surface (4b) oriented at an angle different from zero relative to the base surface (4a).