Orbital Welding Head Torque Monitoring for Jam Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing orbital welding devices lack effective safety measures to prevent damage and failure due to torque overload and foreign body jamming, particularly in the drive mechanism.
Innovation Solution
An orbital welding device equipped with an electric torque measuring device connected to a motor controller that automatically stops the motor if torque exceeds a predetermined threshold, and optionally provides reverse rotation or alerts upon further torque exceedance, with integrated current measurement for torque representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a slipping clutch is used to limit torque, then user safety is improved, but the motor continues to apply limited torque which may still cause damage
Solution Approach 1:
The system continuously monitors torque via a torque measuring device and feeds this information back to the motor controller, which automatically stops the motor when the first predetermined torque is exceeded, preventing further damage while maintaining safety
Solution Approach 2:
The patent replaces the mechanical slipping clutch with an electronic control system that uses torque measurement and automated motor control to achieve the same safety function without the limitations of mechanical torque limiting
2Reliability
If the motor is stopped automatically when torque exceeds the first predetermined torque, then damage from foreign body jamming is reduced, but the device requires additional torque measurement and control systems
Solution Approach 1:
The torque measuring device provides continuous feedback to the motor controller, enabling automatic detection and response to torque anomalies without requiring complex external monitoring systems
Solution Approach 2:
The system performs self-diagnosis and self-protection by automatically detecting torque exceedance and stopping the motor without external intervention, reducing the need for additional safety systems
3Reliability
If the motor is automatically started in reverse direction after stopping, then safety is further improved by freeing pinched objects, but the control logic becomes more complex
Solution Approach 1:
The system implements a periodic sequence of operations: monitor torque, stop motor when threshold is exceeded, wait for user intervention, then automatically restart in reverse direction for a predetermined time before stopping again, creating a systematic safety protocol
Solution Approach 2:
The torque measuring device continues to monitor torque during reverse rotation, providing feedback to the motor controller to automatically stop the motor if torque exceeds the first predetermined torque again, ensuring continuous protection
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 safety by preventing damage from torque overload and foreign body jamming, while reducing device failure probability through proactive motor control and alert mechanisms.
Implementation Method 1
the torque measuring device has a current measuring device, which is configured to measure an electric motor current for driving the motor as a value representing the torque
Data Source
AI summary
An orbital welding device (1) having a welding head (2), the welding head having a tubular mount (3) and a welding electrode holder (4) rotatably supported with respect to the tubular mount (3), the orbital welding device (1) having an electric motor (6) activated by a motor controller (5) of the orbital welding device (1), which is configured to drive the welding electrode holder (4) and thus to rotate the same with respect to the tubular mount (3), wherein the orbital welding device (1) has an electric torque measuring device (7), which is configured to measure a torque applied by the motor (6) to the welding electrode holder (4), wherein the torque measuring device (7) is connected to the motor controller (5), and wherein the motor controller (5) is configured to stop the motor (6) automatically if the torque exceeds a predetermined first torque.