Expanded Metal with Varied Loop Shapes for Optical and Airflow Control
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Solution Overview
Problem
Expanded metal sheets experience non-uniform dimensional changes due to varying tooth wear on expansion blades, leading to uncontrollable deformations and potential scrap, especially in applications requiring tight tolerances, such as automotive fabrication.
Innovation Solution
The production of expanded metal with loops of different shapes and orientations, achieved by using an expansion blade with teeth of varying shapes and orientations, allowing for predictable and controllable deformation, and enabling new optical and airflow management capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If uniform teeth geometry is used on expansion blade, then manufacturing precision is maintained, but adaptability and optical appearance variety are limited
Solution Approach 1:
The expansion blade is designed with teeth that have different geometries at different locations. Specifically, teeth in different columns (first column vs second column) have different shapes or orientations, creating locally varied loop shapes while maintaining overall dimensional control. This allows the expanded metal to have diverse optical appearances in different regions while still achieving uniform dimensional changes across the entire sheet.
Solution Approach 2:
The expansion blade's tooth configuration is segmented into different columns, where each column can have teeth with distinct geometries. This segmentation allows independent optimization of tooth shapes in different regions, enabling the creation of expanded metal with varied optical properties in different sections while maintaining controlled dimensional changes through the overall blade design.
2Adaptability or versatility
If expansion blade teeth wear differently, then adaptability to various patterns is achieved, but manufacturing precision deteriorates due to uncontrollable deformations
Solution Approach 1:
Instead of relying on random tooth wear to create pattern variety, the invention preliminarily designs the expansion blade with teeth of different shapes and orientations from the start. This preliminary configuration ensures that the desired pattern variety is achieved intentionally, while the overall blade geometry is designed to maintain uniform dimensional changes and prevent uncontrollable deformations.
Solution Approach 2:
The invention changes the geometric parameters of the expansion blade teeth systematically. Teeth in different columns have different shapes, sizes, or orientations, which are carefully selected to create desired loop patterns while maintaining controlled dimensional changes. This systematic parameter variation allows pattern diversity without sacrificing dimensional precision.
3Adaptability or versatility
If different loop shapes are created in different columns, then optical appearance and airflow control are enhanced, but device complexity increases
Solution Approach 1:
The expansion blade is segmented into columns with different tooth configurations, allowing each column to create specific loop shapes tailored for particular functions (optical appearance, airflow control). This segmentation enables functional differentiation while keeping each segment's design relatively simple and manageable.
Solution Approach 2:
The expansion blade with varied tooth geometries serves multiple functions simultaneously: it creates diverse optical appearances through different loop shapes, controls airflow patterns through strategically positioned loop configurations, and maintains dimensional precision through overall blade design. This multi-functionality is achieved within a single blade structure without requiring multiple separate tools.
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
This approach results in a cost-effective material with enhanced optical appearances and airflow control, suitable for automotive interior components, such as defroster covers and speaker covers, while minimizing deformation and enabling optimized air flow management.
Implementation Method 1
The teeth of the expansion blade penetrate into the sheet metal plane and displace the metal. This changes dimensions of a defined sheet metal section
Implementation Method 2
The sheet metal is pulled along under an expansion blade that moves up and down in a vertical direction relative to a sheet metal plane and also moves sideways in an alternating manner
Data Source
AI summary
A method for producing an expanded metal, the method including producing a sheet of the expanded sheet metal by introducing openings through one expansion blade wherein all the openings are configured as diamond shaped loops without a material loss and defined by a loop width, a loop length and a loop shape; and forming the diamond shaped loops respectively by four linear bars that are defined by a bar width and a bar thickness wherein two of the four linear bars are respectively connected at four nodes; arranging plural of the diamond shaped loops in columns adjacent to one another and in rows adjacent to one another; and forming first columns of first diamond shaped loops different from second columns of diamond shaped second loops in a loop width or in a loop length respectively measured from a node center to a node center.