Handheld Welding Gun Displacement Sensing for Precise Weld Control
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Solution Overview
Problem
Manual welding operations with handheld welding guns face challenges in monitoring and controlling weld parameters due to operator-dependent techniques and environmental factors, making it difficult to ensure consistent and accurate welding processes.
Innovation Solution
A handheld welding gun equipped with a gyroscope sensor, accelerometer, and magnetometer integrated into a compact sensor unit on a control card, which monitors and controls the welding gun's position, motion, and behavior before, during, and after the welding process, allowing for precise adaptation of welding parameters and detection of improper use or errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a displacement measuring system with encoder and encoder strip is integrated into the welding gun, then measurement precision and control accuracy are improved, but device complexity increases
Solution Approach 1:
The encoder strip is positioned between the actuator rod and the holding unit, nesting the measurement system within the existing actuator mechanism. The encoder strip (152) is disposed between the actuator rod (144) and the holding unit (120), utilizing the existing mechanical space without requiring separate measurement system housing or additional external components.
Solution Approach 2:
The encoder strip serves dual functions: it acts as both a mechanical spacer/maintainer of clearance and a measurement scale for the encoder. The encoder strip (152) maintains the clearance between the actuator rod (144) and the holding unit (120) while simultaneously serving as the measurement scale, eliminating the need for separate spacer components and measurement scales.
2Manufacturing precision
If sensors are integrated into the welding gun to monitor weld parameters, then manufacturing precision and quality control are improved, but ease of operation deteriorates due to additional complexity
Solution Approach 1:
The encoder and encoder strip are merged into a single integrated measurement system where the encoder strip serves both as a mechanical component (maintaining clearance) and a measurement scale. This consolidation reduces the number of separate components that would otherwise need to be assembled and maintained, simplifying the overall system despite the added measurement capability.
3Measurement precision
If the encoder strip is positioned between the actuator rod and holding unit, then measurement precision is improved, but device complexity increases due to assembly complexity
Solution Approach 1:
The encoder strip serves dual functions: it acts as both a mechanical spacer/maintainer of clearance and a measurement scale. The encoder strip (152) maintains the clearance between the actuator rod (144) and the holding unit (120) while simultaneously serving as the measurement scale, eliminating the need for separate spacer components and measurement scales.
Solution Approach 2:
The encoder strip is positioned between the actuator rod and the holding unit, nesting the measurement system within the existing actuator mechanism. This nested arrangement utilizes the existing mechanical space without requiring separate measurement system housing or additional external components, thereby simplifying assembly.
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 integration of sensors enables strict control and monitoring of the welding gun's behavior, ensuring accurate and consistent welds by adapting parameters in real-time, reducing human error and improving the overall quality of the welding process while maintaining a compact and user-friendly design.
Implementation Method 1
The sensor unit comprises a gyroscope sensor mounted within the housing, wherein the gyroscope sensor is arranged on the control card
Implementation Method 2
The sensor unit comprises an accelerometer mounted within the housing, wherein the accelerometer is arranged on the control card
Implementation Method 3
The sensor unit comprises a magnetometer mounted within the housing, wherein the magnetometer is arranged on the control card
Implementation Method 4
Then a so-called pilot current is switched on and the metal stud is lifted somewhat relative to the metal sheet. Thus, an electric arc is set. Then the welding current proper is switched on and the mutually opposed faces are incipiently fused by the high-energy electric arc.
Data Source
AI summary
Handheld welding gun for welding an element to a component comprising a linear actuator unit with a linear actuator housing and a linear actuator rod adapted to actuate the holding unit in order to move the element between the lift position and the plunge position, the linear actuator rod extending partly inside and partly outside the linear actuator housing. A displacement measuring system communicates with a control card. The linear actuator, the displacement measuring system and the control card are connected together to form a compact actuator unit.