Welding Torch Fume Extraction with Position-Based Flow Control
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Solution Overview
Problem
Existing welding and soldering processes generate harmful fumes that are not effectively extracted, especially in robot-assisted operations, leading to inefficient energy consumption and compromised shielding gas coverage due to fixed volume flow settings.
Innovation Solution
A device with a sensor system to detect the position and changes in position of the torch, allowing for automatic adjustment of the extraction unit's volume flow based on the torch's position, ensuring optimal fume extraction without interfering with the welding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a fixed volume flow setting is used in the extraction unit, then the device structure remains simple, but fume extraction effectiveness deteriorates and energy consumption increases
Solution Approach 1:
The extraction unit's volume flow is made dynamically adjustable based on torch position. The control unit receives position data from the sensor system and automatically adjusts the extraction volume flow accordingly, transforming the fixed extraction system into a dynamic one that adapts to different welding positions and fume generation rates.
Solution Approach 2:
The system changes the extraction parameter (volume flow) based on detected torch position and welding parameters. By monitoring position changes and adjusting the extraction unit's operating parameters in real-time, the system optimizes fume capture efficiency while avoiding excessive energy consumption during positions where less extraction is needed.
2Object-affected harmful factors
If the extraction unit operates at high volume flow continuously, then fume extraction is improved, but shielding gas coverage deteriorates due to interference with gas flow
Solution Approach 1:
The extraction volume flow is dynamically adjusted based on real-time torch position detection. During positions where shielding gas coverage is critical, the extraction unit operates at lower volume flow to avoid interfering with gas flow patterns, while maintaining adequate fume extraction capability.
Solution Approach 2:
The sensor system continuously monitors torch position and provides feedback to the control unit, which adjusts the extraction unit's volume flow in response. This closed-loop control ensures that extraction intensity is optimized for each position while maintaining proper shielding gas coverage, preventing the harmful effect of extraction interfering with gas flow.
3Adaptability or versatility
If manual adjustment of extraction volume flow is implemented, then operation flexibility is improved, but ease of operation deteriorates due to additional manual control requirements
Solution Approach 1:
The system performs automatic adjustment of extraction volume flow based on sensor-detected torch position and welding parameters. The control unit autonomously manages the extraction unit without requiring manual intervention, allowing the system to serve itself in optimizing extraction performance while maintaining ease of operation.
Solution Approach 2:
Manual mechanical adjustment of extraction volume flow is replaced by an automated sensor-based control system. The sensor system detects torch position and the control unit electronically adjusts the extraction unit, substituting manual mechanical control with an automated electromechanical system that improves ease of operation while maintaining flexibility.
4Productivity
If sensor means and automatic control are added to the device, then productivity and quality are improved, but device complexity increases
Solution Approach 1:
The sensor system and control unit serve multiple functions: detecting torch position, determining welding parameters, controlling extraction volume flow, and optimizing both welding quality and energy efficiency. By making the control system universal and multi-functional, the added complexity is justified by the multiple benefits gained across different operational aspects.
Solution Approach 2:
The automated control system independently manages extraction optimization based on sensor input, eliminating the need for additional manual operations or complex mechanical adjustment mechanisms. The system self-regulates to improve productivity and quality while keeping the added complexity manageable through autonomous operation.
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
Enhances the quality of welded connections, optimizes energy consumption, and maintains effective shielding gas coverage by dynamically adjusting the extraction capacity according to the torch's position and process parameters.
Implementation Method 1
at least one sensor means (3) for determining the position and/or the changes in the position of the torch (1)
Implementation Method 2
vacuum generator (2) for extracting fumes
Implementation Method 3
generate an arc between the workpiece and a consumable or a non-consumable welding electrode
Implementation Method 4
the arc generated for the welding heats up the workpiece that is to be welded
Implementation Method 5
A stream of shielding gas shields the material that is to be welded as well as the welding site against the atmospheric gases
Data Source
AI summary
A device (10) for thermally joining workpieces has a torch (1) and an extraction unit (2) for extracting fumes that are produced during welding, cutting or soldering processes. At least one sensor (3) determines the position and/or position changes of the torch (1) and/or a reference point in the area relative to a reference position of the torch (1) and/or of the workpiece that is to be processed. Volume flow of extracted fumes at the extraction unit (2) acting at the torch (1) is adjusted as a function of the determined position and/or position change of the torch (1).