Training Arc-Welding Torch Clamping with Realistic Restoring Force
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Solution Overview
Problem
Existing training manual arc welding torches do not realistically simulate the clamping and releasing of stick electrodes, leading to novice welders gaining false impressions of the forces required in real-life operation due to unnaturally low clamping forces.
Innovation Solution
A training manual arc welding torch with a clamping device that applies a restoring force greater than the clamping force, using a retracting device like a geared motor or servo motor, and a clamping mechanism that simulates realistic clamping and releasing processes, while allowing for variable electrical measurement signals to be transmitted through the clamping jaws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a training manual arc welding torch uses a clamping device with low clamping force to simulate electrode holding, then the operation becomes easier for beginners, but it creates false impressions about the actual forces required in real welding operations
Solution Approach 1:
A spring element is introduced as an intermediary component between the clamping lever and the clamping jaw. This spring provides a restoring force that simulates the resistance encountered in real welding torches, creating a more accurate training experience while still allowing beginners to operate the device. The spring acts as a mediator that translates the simple lever motion into a realistic clamping force profile.
Solution Approach 2:
The clamping force parameter is dynamically adjusted through the spring mechanism. As the clamping lever is actuated, the spring compresses and provides increasing restoring force, creating a variable clamping force profile that better matches real welding conditions. This parameter change allows the device to maintain training accuracy while remaining operable for beginners.
2Reliability
If a training manual arc welding torch uses high clamping force to accurately simulate real welding conditions, then training accuracy improves, but the operation becomes more difficult for beginners and increases wear on components
Solution Approach 1:
The clamping mechanism transitions from a static high-force system to a dynamic system where the clamping force varies during operation. The spring provides a restoring force that changes as the lever is actuated, creating a dynamic force profile that is easier to operate than constant high force while still maintaining training accuracy. The force required to operate the lever varies throughout the stroke, making it more beginner-friendly.
Solution Approach 2:
The spring restoring force is designed to be partially greater than the minimum required for accurate simulation, providing a safety margin that prevents excessive wear on components. This partial excessive action ensures that the clamping force remains within safe limits throughout the operating range, reducing wear while maintaining training fidelity.
3Device complexity
If a training manual arc welding torch uses a mechanical spring for restoring force, then the structure remains simple, but the restoring force may not be sufficient to overcome friction and ensure realistic simulation
Solution Approach 1:
The mechanical spring system is supplemented or replaced with an electric motor-driven retraction mechanism. This substitution provides a more reliable and controllable restoring force that can easily overcome friction in the clamping mechanism. The motorized system maintains simplicity in terms of operational complexity while dramatically improving the magnitude and reliability of the restoring force.
Solution Approach 2:
The restoring force mechanism becomes a composite system combining both mechanical spring elements and electric motor components. This hybrid approach leverages the simplicity and reliability of mechanical springs for basic force provision, while the electric motor adds the necessary force magnitude and control capability to ensure realistic simulation without excessive mechanical complexity.
4Force
If an electric motor is used for rod electrode retraction to provide sufficient force, then the retraction capability improves, but the service life of the motor decreases due to high loads
Solution Approach 1:
A decoupling mechanism is introduced between the electric motor and the rod electrode retraction system. This mechanism cushions the motor against high loads by allowing the motor to operate at lower, more sustainable force levels while still achieving the required retraction force through mechanical advantage or stored energy. The cushioning protects the motor from damaging peak loads that would reduce its service life.
Solution Approach 2:
The rod electrode retraction is implemented as a periodic rather than continuous action. The electric motor provides force in periodic bursts during retraction events rather than maintaining constant high force, allowing the motor to cool and recover between operations. This periodic operation pattern significantly extends motor service life while maintaining adequate retraction capability when needed.
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 solution provides a realistic simulation of clamping and releasing processes, enhancing the service life of retracting devices and ensuring novice welders gain accurate insights into the forces required for manual welding, thereby improving training effectiveness.
Implementation Method 1
a return device (5), in particular a spring, which provides a restoring force (Fr)
Implementation Method 2
a first longitudinal electrode (61), a second longitudinal electrode (62) and an insulating layer (63) arranged between the longitudinal electrodes (61, 62), such that a first clamping jaw (31) of the clamping jaws (31, 32) can be contacted by the first longitudinal electrode (61) and a second clamping jaw (32) of the clamping jaws (31, 32) can be contacted by the second longitudinal electrode (62) to generate a variable electrical measurement signal (se)
Data Source
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AI summary
In order to provide a training manual arc welding torch (1) that allows realistic clamping and releasing of training stick electrodes (6), a restoring force (Fr) for restoring a clamping lever (4) of the training manual arc welding torch (1) is selected to be greater than a clamping force (Fk) for clamping the training stick electrodes (6), and a training stick electrode (6) is provided that has a first longitudinal electrode (61) extending along a longitudinal axis of the training stick electrode (6), a second longitudinal electrode (62) extending along the longitudinal axis of the training stick electrode (6), and an insulating layer (63) arranged between the longitudinal electrodes, so that a first clamping jaw (31) of the clamping jaws (31, 32) of the training manual arc welding torch (1) can be contacted by the first longitudinal electrode and a second clamping jaw (32) the clamping jaws (31, 32) of the training manual arc welding torch (1) can be contacted by the second longitudinal electrode,to transmit a variable electrical measuring signal (se) via the clamping jaws (31, 32).,