Online Rivet Geometry Inspection Before Riveting Head Entry
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Solution Overview
Problem
Existing methods for checking rivet geometry in riveting machines are inadequate as they cannot accurately examine regions concealed by the riveting head, leading to potential errors in rivet suitability for specific bores, which can result in faulty connections.
Innovation Solution
A method for contactless, online measurement of rivet geometry on the transporting path to the riveting machine using an optical recording system within a measuring chamber, allowing for accurate determination of parameters like head diameter, shank diameter, and transition radius without interrupting the riveting process, and guiding the rivet to either the machine or a reject position based on tolerance criteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the rivet is checked optically in the riveting head, then the surface protection can be examined, but the rivet geometry cannot be checked accurately due to concealed regions
Solution Approach 1:
The rivet is measured on the transporting path before it is received in the riveting head. This preliminary measurement action allows complete optical access to all rivet surfaces including the head, shank, and transition regions, enabling accurate geometry verification before the rivet enters the constrained space of the riveting head where measurement would be impossible.
Solution Approach 2:
A measuring arrangement with optical recording devices is introduced as an intermediary system between the rivet filling station and the riveting machine. This intermediary measurement system captures images of the rivet on the transporting path, allowing geometry assessment without modifying the riveting head structure or compromising measurement accuracy.
2Measurement precision
If the rivet measurement is performed on the transporting path, then the measurement accuracy is improved, but the measurement system complexity increases
Solution Approach 1:
The measuring arrangement is designed to perform multiple functions: it measures rivet geometry, verifies tolerance compliance, and directs the rivet to either the riveting machine or a reject position. By consolidating these functions into a single integrated system on the transporting path, the overall device complexity is managed while achieving comprehensive measurement capabilities.
Solution Approach 2:
The measurement system automatically captures images, processes the rivet geometry data, and determines compliance with tolerance criteria without requiring manual intervention. The system self-manages the complete measurement and decision-making process, reducing operational complexity while maintaining high measurement precision.
3Productivity
If the rivet is measured before entering the riveting head, then the measurement is not delayed, but the integration with existing equipment becomes complex
Solution Approach 1:
The measurement process is segmented from the riveting process itself. The measuring arrangement is positioned on the transporting path as a separate, independent measurement zone that operates in parallel with the riveting cycle. This segmentation allows measurement to occur without interrupting or delaying the riveting machine operations, maintaining productivity while managing integration complexity.
Solution Approach 2:
The measurement of the rivet occurs continuously on the transporting path without interrupting the flow of rivets from the filling station to the riveting machine. The measurement action is embedded in the existing transport workflow, ensuring continuous operation of all equipment while maintaining the required measurement function.
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 rapid and accurate assessment of rivet suitability for specific bores, preventing faulty connections by ensuring compliance with tolerance criteria without delaying the riveting machine or rivet filling station operations.
Implementation Method 1
the rivet is measured on the transporting path for determining a rivet geometry of the rivet by an optical recording system
Data Source
AI summary
The disclosure relates to a method for checking a rivet, the rivet being transported from a rivet filling station along a transporting path in the direction of a riveting machine during operation of the riveting machine. The method is characterized in that the rivet is measured on the transporting path for determining a rivet geometry of the rivet. The disclosure similarly relates to a corresponding measuring arrangement for checking a rivet.