Automotive Window Glass Mounting with Slit Laser Alignment
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Solution Overview
Problem
Existing methods for mounting automotive window glass fail to accurately correct displacements in the crosswise direction of curved window glass surfaces, leading to non-uniform bonding and clearance issues during robotic installation.
Innovation Solution
A method and device utilizing a robot arm with slit laser beams and image processing to calculate and adjust the rotation and positioning of the window glass, ensuring uniform clearance correction across the curved surface, allowing for precise alignment and uniform pressure application during mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the window glass is positioned by the robot on the window glass mounting surface without correcting curved surface shape displacement, then the positioning process is simple, but the clearance between the window glass ends and mounting surface becomes non-uniform, causing non-uniform bonding
Solution Approach 1:
The patent measures the curved surface shape of the window glass before positioning and calculates the displacement in advance. This preliminary measurement and calculation enable the system to determine the necessary correction amounts for each end of the window glass, ensuring uniform clearance and bonding without complicating the actual positioning operation.
Solution Approach 2:
The patent employs a feedback mechanism where the measured curved surface shape data is used to calculate displacement corrections. The system continuously monitors the window glass shape, computes the deviation from the ideal position, and adjusts the positioning accordingly, ensuring uniform clearance and bonding quality.
2Measurement precision
If the robot corrects the position of the window glass mounted position, then the mounting position accuracy is improved, but the displacement of the curved surface shape in the crosswise direction remains uncorrected, leading to non-uniform bonding
Solution Approach 1:
The patent divides the window glass into multiple segments (right end and left end) and measures the curved surface shape at each segment independently. This segmentation allows the system to calculate and correct the displacement for each end separately, ensuring that the crosswise direction shape uniformity is maintained while achieving accurate mounting position.
Solution Approach 2:
The patent applies local quality correction by determining the specific displacement characteristics at each end of the window glass and applying针对性的 (targeted) correction amounts to each location. This localized approach ensures that the curved surface shape uniformity is corrected at each specific position rather than applying a uniform correction across the entire glass.
3Ease of operation
If the window glass is pressed onto the mounting surface without rotation adjustment, then the mounting operation is simple, but the non-uniform clearance causes non-uniform bonding and mounting quality
Solution Approach 1:
The patent introduces dynamic rotation adjustment capability to the robot positioning system. The system can dynamically rotate the window glass around the vertical axis based on the calculated displacement values, enabling the glass to be oriented at the optimal angle for uniform bonding. This dynamic adjustment maintains bonding uniformity while keeping the mounting operation automated and efficient.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and uniform mounting of automotive window glass by adjusting the window glass's position and rotation to match the mounting surface, ensuring proper bonding and reducing installation errors due to curved surface displacements.
Implementation Method 1
irradiating both the ends approximately at the same position as each other at least in the crosswise direction of the window glass with a slit laser beam from upward at an angle with regard to the perpendicular direction to the surface of the window glass held at the window glass holding member across the right and the left ends of the window glass, the window glass mounting surface and a surface of the body
Implementation Method 2
photographing bent laser beams, which are formed, using the slit laser beams irradiated across the right and left ends of the window glass, the window glass mounting surface and the surface of the body
Data Source
AI summary
A window glass can be accurately and preferably mounted by correcting a displacement of a curved surface shape of the window glass in the crosswise direction even when there is a displacement of the curved surface shape of the window glass in the crosswise direction. A slit laser beam is irradiated with from slit laser beam irradiators 12c and 12d across the right and left ends of the window glass 6, the circumference of a window glass mounting opening 8, and a windshield pillar section 11; rotation adjustment of the window glass 6 is performed, based on a processed image obtained by image processing of images, which have been photographed with a CCD cameras 10c and 10d, of the slit laser beams, in such a way that clearances in the pressing direction at the right and left ends of the window glass 6 are the same as each other; and the window glass 6 is pressed onto a window glass mounting surface on the circumference of the window glass mounting opening 8 for mounting onto the surface.