Pressure Vessel Pre-Embossing for Fold Formation and Gas-Tightness
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Solution Overview
Problem
Existing pressure vessels in vibration dampers are not optimally adapted to the annular compensation space, leading to suboptimal fold formation and gas-tightness challenges due to embossing methods that result in constrictions and difficulties in achieving gas-tightness.
Innovation Solution
A method involving pre-embossing the enveloping body on the inside with a die having an arcuate contour, aligning the outer edge with an embossing profile, and using compressed gas as the pressure medium for testing gas-tightness, allowing the pressure vessel to assume a defined fold formation and ensuring gas-tightness during installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If embossing is applied to the enveloping body to ensure proper mounting in the annular compensation chamber, then the pressure vessel can be mounted with fewer wrinkles, but constrictions are created between adjacent cushion sections that prevent optimal utilization of the compensation chamber space
Solution Approach 1:
The embossing is applied selectively only to the inner diameter region of the enveloping body, while the outer diameter region remains free of embossing. This local differentiation allows the inner surface to form proper folds for mounting while the outer surface maintains optimal volume utilization in the compensation chamber.
Solution Approach 2:
The enveloping body is divided into different regions with different treatments: the inner diameter region receives embossing for fold formation, while the outer diameter region remains smooth for optimal space utilization. This segmentation resolves the contradiction between fold precision and volume utilization.
2Ease of manufacture
If traditional embossing methods are used to form the pressure vessel, then the enveloping body can be shaped, but gas-tightness becomes difficult to achieve and test
Solution Approach 1:
Compressed gas is used as the pressure medium for both forming and testing the enveloping body. The gas tightness can be quickly determined by introducing a test gas and examining it for components of the compressed gas, providing a reliable and efficient method to verify gas-tightness while maintaining ease of manufacture.
3Adaptability or versatility
If the enveloping body is embossed to assume a defined fold formation, then the pressure vessel is better adapted to the annular compensation space, but the production process becomes more complex
Solution Approach 1:
The enveloping body is pre-embossed with the defined fold formation before final assembly. This preliminary action ensures proper adaptation to the annular compensation space while allowing for standardized production processes and quality control, balancing adaptability with manufacturing complexity.
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
The pressure vessel is better adapted to the annular compensation space with minimal fold deviations and improved gas-tightness, enabling efficient and automated testing and installation with reduced wrinkles and enhanced performance in vibration dampers.
Implementation Method 1
Under the influence of pressure inside the enveloping body, the enveloping body is clamped onto the die and is thereby plastically deformed in the area of the wedge profile.
Implementation Method 2
Under the influence of pressure inside the enveloping body, the enveloping body is clamped onto the die
Implementation Method 3
The test gas is examined in the manufacturing process of the pressure vessel with regard to the tightness of the pressure vessel for proportions of the pressure gas in the testing device
Data Source
Figure 1
Figure 2~3
AI summary
The method involves fitting the enveloping body with its inner diameter area on one side on a die plate (33), where the die plate has a raised wedge profile. The external diameter area of the enveloping body is attached on a support surface (29). The enveloping body is filled with a pressure medium, by which the enveloping body is tensioned on the die plate and is plastically deformed in the area of the wedge profile. An independent claim is included for a device for manufacturing a pressure container.