Flat Gasket Edging Fold Deformation Restriction
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Solution Overview
Problem
Existing cylinder head gaskets require additional support layers and complex construction processes to create deformation restriction means, leading to increased material consumption and unnecessary working steps.
Innovation Solution
A flat gasket with an edging fold integrated into the gasket sheet made of spring steel or metallic material, which serves as both a bending region and a flange region, eliminating the need for additional support layers and simplifying the deformation restriction mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional support layer made of different material is provided to form edging fold, then the deformation restriction means can be formed, but the number of sheet metal layers increases and material consumption increases
Solution Approach 1:
The patent merges the support layer and the edging fold into a single integrated structure made from the same spring steel material. The edging fold is formed directly from the gasket sheet itself through bending, eliminating the need for a separate support layer made of different material. This reduces material consumption while maintaining the deformation restriction function.
Solution Approach 2:
The gasket sheet made of spring steel performs multiple functions: it provides the sealing surface, forms the beads for sealing, and simultaneously forms the edging fold for deformation restriction. This multi-functionality eliminates the need for additional specialized layers, reducing overall material consumption while achieving the same technical效果.
2Reliability
If an additional support layer is welded or punched to form deformation restriction means, then the bead deformation is restricted, but the construction process becomes more complex with additional working steps
Solution Approach 1:
The edging fold is formed as an integral part of the gasket sheet through a single bending operation, combining the support function and deformation restriction function into one structure. This eliminates the need for separate welding or punching operations to create deformation restriction means, simplifying the construction process.
Solution Approach 2:
The edging fold is formed in advance during the gasket manufacturing process as part of the shaping operations. By pre-forming the edging fold structure, the deformation restriction capability is built-in before assembly, eliminating the need for additional working steps during construction or installation.
3Quantity of substance
If edging fold is formed on spring steel gasket sheet, then the material consumption is reduced, but the manufacturing precision requirement increases due to bending spring steel
Solution Approach 1:
The patent utilizes the specific material properties of spring steel, particularly its elasticity and yield characteristics, to enable reversible and controlled bending. By understanding and working within the material's stress-strain parameters, the edging fold can be formed with consistent precision through controlled bending operations.
Solution Approach 2:
The edging fold is formed with specific geometric parameters and dimensions optimized for the spring steel material properties. The bending radius, fold depth, and flange dimensions are designed to achieve the desired deformation restriction while accommodating the material's behavior during forming, ensuring manufacturing precision.
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 design reduces material consumption, simplifies the construction process, and enhances the service life of the gasket by preventing bead deformation, thereby increasing the overall durability of the gasket.
Implementation Method 1
the gasket sheet made of the spring steel or the spring steel-like metallic material... which has good elastic properties
Data Source
AI summary
In order to provide a flat gasket, in particular cylinder head gasket, comprising at least one metal gasket sheet made of a spring steel or a metallic material with a percentage elongation after fracture corresponding to the percentage elongation after fracture of a spring steel, which has a novel structure, it is proposed that the gasket sheet is provided with at least one edging fold, which comprises a bending region and a flange region connected in one piece to the gasket sheet via the bending region.