Transmission Element Channel for Optical Vibration Monitoring
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Solution Overview
Problem
In punch riveting devices with vibration generators, determining the vibration behavior of the rivet is challenging due to the rivet's smooth surface being obstructed by the transmission element and being surrounded by a hold-down device, making it difficult to analyze using vibrometers.
Innovation Solution
A transmission element with a channel that allows optical signals to be directed onto the rivet, featuring an optical deflection device such as a mirror or prism, enables precise analysis of the rivet's vibration behavior by deflecting the signal to the rivet's surface, even when the transmission element is vibrating, and is designed to minimize interference with the vibration measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a transmission element is used to transmit vibrations to the rivet, then the riveting process can be monitored for vibration behavior, but the optical signal path to the rivet is blocked by the transmission element and hold-down device
Solution Approach 1:
The transmission element is segmented by incorporating a channel through its structure. This channel creates a dedicated pathway that allows optical signals to reach the rivet surface without being blocked by the transmission element itself or the hold-down device, thus resolving the measurement access problem while maintaining vibration transmission functionality
Solution Approach 2:
An optical deflection device (such as a mirror or prism) is introduced as an intermediary component within the channel. This deflection device redirects the optical signal path to illuminate the rivet surface at optimal angles, enabling accurate vibrometer measurements while the channel structure ensures the optical path remains unobstructed by other components
2Measurement precision
If the transmission element is designed with a channel for optical signals, then vibrometer measurement becomes possible, but the structural complexity of the transmission element increases
Solution Approach 1:
The channel structure is merged with the transmission element's existing geometry rather than being added as a separate component. The channel is integrated into the transmission element's body, allowing optical signal passage while maintaining the element's primary vibration transmission function, thus minimizing additional structural complexity
Solution Approach 2:
The transmission element is designed to serve multiple functions: it transmits vibrations to the rivet while simultaneously providing a structured pathway for optical signals. This multi-functionality reduces the need for separate measurement apparatus and minimizes overall system complexity despite the added channel feature
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 accurate monitoring and quality assessment of the riveting process by determining the vibration behavior of the rivet during the punching process, allowing for real-time feedback and improved process control, reducing the risk of faulty connections.
Implementation Method 1
a vibration generator, such as an ultrasonic generator, is used to move one or more components when connecting the components to set in motion
Implementation Method 2
an optical deflection device, in particular a mirror, a prism, an optical fiber or a reflecting surface in the transmission element, is provided in the channel between the first opening and the second opening, by means of which the optical signal is directed from the first opening in the direction of the second opening
Implementation Method 3
The functioning of a vibrometer is based on the Doppler effect, by which the frequency of an optical signal, e.g. a light or laser beam, especially with wavelengths in the red, visible or infrared range, which is directed onto and reflected from a vibrating surface, will be changed
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 2(c)~2(d)
AI summary
The invention relates to a transmission element (15') for transmitting vibrations to a rivet in a self-piercing riveting device with a vibration generator, wherein the transmission element (15') can be coupled to the vibration generator via a first end (131) such that the transmission element (15') can be set into vibration by the vibration generator, wherein the transmission element (15') can be brought into contact with the rivet at a second end (132), wherein the transmission element (15') has a channel (136) which opens into a first opening (141) at the second end (132), wherein the channel (136) is designed such that an optical signal (110) can be directed through the channel (136) to the rivet, as well as such a self-piercing riveting device, a manufacturing device and a method for determining vibration behavior.