Damper Assembly Press-Fit Accumulator Interface Without External Jigs
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Solution Overview
Problem
Existing damper assembly assembly methods require external tooling or jigs to secure the accumulator and pressure tubes, which can be cumbersome and inefficient.
Innovation Solution
A method involving a press fit between the damper interface and accumulator interface, with conical surfaces providing an interference fit, allowing secure positioning without external tooling, followed by laser welding for additional fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If external tooling or jigs are used to secure the accumulator and pressure tubes during assembly, then the positioning stability is improved, but the device complexity and ease of manufacture deteriorate
Solution Approach 1:
The conical interface surfaces of the damper interface and accumulator interface are designed to self-align and self-position the pressure tube and accumulator tube during assembly. The interference fit between these conical surfaces automatically maintains proper positioning without requiring external jigs or fixtures, making the assembly process self-sufficient and eliminating the need for additional positioning tooling.
Solution Approach 2:
The conical interface surfaces act as an intermediary mechanism between the damper interface and accumulator interface. This intermediate geometric feature facilitates proper alignment and positioning through its tapered geometry, enabling the components to find their correct relative positions automatically during the press-fit assembly process without external assistance.
2Manufacturing precision
If external tooling or jigs are used to secure the accumulator and pressure tubes, then the manufacturing precision is improved, but the productivity deteriorates
Solution Approach 1:
The press-fit assembly process utilizing conical interface surfaces enables the components to self-align and self-position during assembly. This self-service mechanism ensures proper manufacturing precision through the geometric constraints of the conical surfaces while simultaneously improving productivity by eliminating the time-consuming setup and removal of external jigs and fixtures.
Solution Approach 2:
The invention replaces the mechanical positioning system (external jigs and fixtures) with a geometric positioning system based on conical interface surfaces. This substitution maintains assembly precision through the inherent geometry of the conical surfaces while dramatically improving productivity by eliminating the need for complex mechanical positioning tooling.
3Ease of manufacture
If a press fit with conical surfaces is used to secure the interfaces, then the ease of manufacture is improved, but the strength of the connection may deteriorate
Solution Approach 1:
The conical interface surfaces provide a curved geometric relationship between the damper interface and accumulator interface. This curved geometry distributes the assembly forces more evenly during the press-fit process and creates a more uniform stress distribution in the connection, maintaining connection strength while simplifying the assembly process. The tapered geometry also facilitates easier insertion compared to straight cylindrical interfaces.
Solution Approach 2:
The conical interface design changes the geometric parameters of the connection interface from cylindrical to conical. This parameter change allows for controlled interference fit with optimized force distribution, maintaining adequate connection strength while significantly improving ease of assembly. The angle of the cone can be optimized to balance between assembly ease and connection strength.
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
Enables secure and efficient assembly of damper assemblies by maintaining the relative positioning of the accumulator and pressure tubes during welding, eliminating the need for external fixtures and ensuring robust connections.
Implementation Method 1
press fitting the damper interface to the accumulator interface. The press fit maintains positioning of the accumulator relative to the pressure tube
Implementation Method 2
The damper interface and the accumulator interface may be further secured, e.g., via laser welding
Data Source
AI summary
A method for assembling a damper assembly includes securing a damper interface to an external surface of a pressure tube. The method includes securing an accumulator interface to an external surface of an accumulator tube. The method includes, after the damper interface is secured to the pressure tube and the accumulator interface is secured to the accumulator tube, securing the pressure tube to the accumulator tube by press fitting the damper interface to the accumulator interface.