Connecting Piece With Variable Cross-Section For High Elasticity Press Fit
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Solution Overview
Problem
Press connections made from new metal alloys with high elastic limits and resilience require higher deformation forces, leading to reduced mechanical strength and seal loss due to springback, as existing pressing tools and jaws are insufficient for maintaining a tight connection over time.
Innovation Solution
A connecting piece design with an enlarged cross-section area spaced apart from the annular bead, interacting with the pressing tool to increase deformation, and a reduced cross-section area between the annular bead to reduce pressing forces, creating a mechanically strong and durable press connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If press connections are made from new metal alloys with high elastic limits and resilience, then the material strength and durability are improved, but higher deformation forces are required leading to reduced mechanical strength and seal loss due to springback
Solution Approach 1:
The connecting piece incorporates regions with different cross-sectional areas: an enlarged cross-section region that requires higher deformation forces to ensure adequate compression and mechanical interlocking, and a reduced cross-section region adjacent to the annular bead that requires lower forces to maintain seal integrity. This local differentiation of geometric properties allows the connection to accommodate the high resilience of new metal alloys while preventing seal loss.
Solution Approach 2:
The invention changes the geometric parameters of the connecting piece by creating variable cross-sectional areas along its length. The enlarged cross-section region increases the deformation capacity for materials with high elastic limits, while the reduced cross-section region near the annular bead maintains adequate compression forces for sealing. This parameter variation resolves the contradiction between material strength and seal reliability.
2Adaptability or versatility
If existing pressing tools and jaws are used with new metal alloys, then the equipment compatibility is maintained, but the connection is not sufficiently tight after springback
Solution Approach 1:
The invention changes the geometric parameters of the connecting piece to accommodate the high resilience of new metal alloys. By creating regions with enlarged and reduced cross-sections, the connection piece requires higher deformation forces that can be achieved with existing pressing tools, while ensuring adequate final tightness after springback occurs.
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 design enables a tight and durable press connection in materials with high elasticity and resilience, maintaining mechanical strength and seal integrity even after springback, without requiring adjustments to existing pressing tools.
Implementation Method 1
A suitable pressing tool interacts on the one hand with the annular bead and on the other hand with the first area (with an enlarged cross-section) and creates greater deformation there in the given end position.
Implementation Method 2
The new alloy, due to its higher elastic limit, requires higher deformation forces and exhibits greater springback than gunmetal. The resilience causes the nozzle to move back after deformation to such an extent that the mechanical strength is massively reduced and the seal can be lost.
Data Source
AI summary
A metal connector (1) for creating a press fit has a substantially cylindrical section and an annular bead (2) adjacent to the cylindrical section, with an annular groove (3) formed therein for receiving a ring seal (4). The cross-section of the cylindrical section in a first region (13.1) spaced apart from the annular bead (2) is enlarged on its outer surface. Due to the first region (11.1) with its reduced cross-section, the creation of a tight and mechanically stable press fit is made possible even if the connector (1) is made of a material with a high elastic limit and/or strong springback, and this can also be achieved using previously known and existing press tools and press jaws.