Side Mounting Seat Weldability via Segmented Pressing Surface
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Solution Overview
Problem
The existing vibration welding process for passenger airbag chutes and crash pad panels results in inadequate weldability due to the hollow side mounting seat being directly pressed, leading to reduced adhesive force and quality, causing undesired separation and 'clam shell' formation during airbag deployment.
Innovation Solution
A modified side mounting seat structure with a reduced hollow space and an additional direct pressing target surface, allowing the welding jig to press a previously unpressed area, and an auxiliary structure to prevent interference with airbag deployment, while maintaining the integrity of the seat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hollow side mounting seat is directly pressed during vibration welding, then the welding process can be simplified, but the weldability and adhesive force are degraded
Solution Approach 1:
The side mounting seat is divided into two functional regions: a hollow doghouse portion and a solid pressing target surface portion. This segmentation allows the pressing jig to apply force to the solid portion while the hollow portion remains unpressed, resolving the contradiction between process simplicity and weldability.
Solution Approach 2:
Different regions of the side mounting seat are given different structural qualities - the doghouse region maintains hollow structure for mounting functionality, while the pressing target surface region is made solid to enable effective vibration welding contact. This local differentiation resolves the conflict between structural requirements and welding requirements.
2Area of stationary object
If the hollow side mounting seat is directly pressed during vibration welding, then the pressing area is reduced, but the welding quality is degraded
Solution Approach 1:
The side mounting seat structure is segmented into a hollow doghouse portion and a solid pressing target surface portion, enabling the pressing jig to contact only the solid portion for effective welding while preserving the hollow structure for its mounting function.
Solution Approach 2:
The pressing target surface is designed with solid local structure at the contact region to ensure adequate pressing area and welding quality, while other regions maintain hollow structure for functional requirements.
3Adaptability or versatility
If the hollow doghouse structure is maintained, then the mounting function is preserved, but the weldability at the side mounting seat region is degraded
Solution Approach 1:
The side mounting seat is functionally segmented into a hollow doghouse portion for mounting hardware and a solid pressing target surface portion for vibration welding, allowing both mounting functionality and weldability to coexist without interference.
Solution Approach 2:
Different structural qualities are assigned to different functional regions: the doghouse region remains hollow to preserve mounting adaptability, while the pressing target surface region is made solid to ensure reliable weldability during vibration welding.
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
Enhances weldability and adhesive strength by increasing the direct pressing area, reducing the unpressed region, and minimizing the risk of 'clam shell' formation during airbag deployment, thereby improving the overall quality and reliability of the welding process.
Implementation Method 1
a vibration welding process is performed
Implementation Method 2
repeatedly rub the products at a high speed
Data Source
AI summary
The present disclosure relates to a side mounting seat with an increased area that a vibration welding pressing jig directly presses. It is important to minimize an unpressed area by maximally securing an area that a welding jig may directly press in order to simultaneously secure weldability and exterior quality. The present disclosure provides a structure in which a hollow space in a side mounting seat is reduced by minimizing a necessary area of a hollow doghouse of the side mounting seat of each of both sides of a PAB chute, and a pressing target surface is added to allow the welding jig to press an idle region which is conventionally not directly pressed by the welding jig.