Ultrasonic Composite Vibration Assembly for Stable Element Connection
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Solution Overview
Problem
The connection state between vibration elements in composite vibration elements is unstable due to a relatively large mechanical load, which can lead to potential instability.
Innovation Solution
The ultrasonic composite vibration device connects first and second vibration elements at specific phase angles relative to the standing waves of longitudinal and torsional vibrations, with the second vibration element featuring a slit and frequency adjustment, and is supported at nodes of these waves, enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two vibration elements are connected at the common node plane to reduce vibration loss and improve positioning accuracy, then the vibration efficiency is improved, but the mechanical load at the connection location increases causing unstable connection state
Solution Approach 1:
The patent changes the connection location parameter from the common node plane to a position within a phase angle range of 0.05π based on antinodes of longitudinal vibration standing wave. This parameter change reduces the mechanical load at the connection location while maintaining vibration efficiency, thereby stabilizing the connection state between vibration elements
Solution Approach 2:
The patent specifies that the connection location should be within a phase angle range of 0.22π based on nodes of torsional vibration standing wave. This additional parameter constraint further optimizes the connection stability by considering the torsional vibration characteristics alongside longitudinal vibration
2Adaptability or versatility
If vibration elements are connected to form composite vibration, then the vibration functionality is enhanced, but the connection stability deteriorates due to large mechanical load
Solution Approach 1:
The patent modifies the connection location parameter to be within a specific phase angle range (0.05π from antinodes of longitudinal vibration) rather than at the common node plane. This parameter optimization maintains the composite vibration functionality while reducing mechanical load and improving connection stability
Solution Approach 2:
The patent introduces a dual-constraint parameter system by specifying the connection location should satisfy both: (1) within 0.05π of longitudinal vibration antinodes, and (2) within 0.22π of torsional vibration nodes. This comprehensive parameter optimization ensures both vibration functionality and connection stability
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 connection state is stabilized, reducing mechanical load and improving the stability of the composite vibration system, allowing for efficient bonding of workpieces.
Implementation Method 1
a first vibration element having an electrostrictive transducer that generates the longitudinal vibration
Implementation Method 2
a frequency adjustment element for converting the longitudinal vibration into the torsional vibration
Implementation Method 3
which induces composite vibration by synthesizing longitudinal vibration and torsional vibration
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
There is provided an ultrasonic composite vibration device or the like that is configured by connecting a plurality of vibration elements so that stability of the connection state is improved. A first vibration element 11 and an intermediate vibration element 10 are co-axially connected at one designated connection location which, in a mid-section of an ultrasonic composite vibration device 1, is included in a range within a phase angle of 0.05 π based on antinodes A (M1) of a standing wave M1 of the longitudinal vibration, and is included in a range within a phase angle of 0.22 π based on nodes N (M2) of a standing wave M2 of the torsional vibration. Similarly, in the mid-section of the ultrasonic composite vibration device 1, the intermediate vibration element 10 and the second vibration element 12 are co-axially connected by a mechanical connection mechanism at another designated connection location.