Welding Nozzle Distance Confirmation via Needle Position Feedback
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Solution Overview
Problem
Existing nozzle distance confirmation technologies cannot efficiently detect errors between the position of a welding torch indicated by teaching data and its actual position during welding, making it difficult to correct positioning errors.
Innovation Solution
A nozzle distance confirming device and method that includes a needle for opening and closing a nozzle tip, a needle advancing and retracting unit, a needle position detecting unit, and a nozzle distance confirming member that contacts the workpiece to detect the needle's position, allowing for the identification of errors in teaching data by comparing expected and actual positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If teaching data is used to control nozzle position, then automation is improved, but positioning accuracy deteriorates due to errors between indicated position and actual position
Solution Approach 1:
The patent applies preliminary action by performing nozzle distance confirmation before actual welding work. The system uses teaching data to preliminarily position the nozzle, then confirms the actual distance by detecting whether the nozzle tip contacts the workpiece. This preliminary confirmation allows identification and correction of positioning errors before production welding begins, resolving the contradiction between automation and positioning accuracy.
2Productivity
If teaching data is used for nozzle positioning, then productivity is improved, but measurement precision deteriorates due to undetected positioning errors
Solution Approach 1:
The patent implements feedback by detecting the actual nozzle-to-workpiece distance during confirmation mode and comparing it with the distance indicated by teaching data. The system provides feedback on positioning accuracy by identifying discrepancies between expected and actual positions. This feedback mechanism enables correction of teaching data to improve measurement precision while maintaining the productivity benefits of automated positioning.
Data Source
AI summary
In a nozzle distance confirming device and a method of nozzle distance confirmation, first, a nozzle distance confirming member together with an exchange section is attached to a tip section of a nozzle main body. Next, a tip section of a needle is caused to abut on the nozzle distance confirming member, whereby the nozzle distance confirming member is exposed from the exchange section and brought into contact with a workpiece. Next, a position of the needle is detected by an eddy current sensor.