Rotary Jaw Electrode Extraction for Automated Welding Clamp Change
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Solution Overview
Problem
Existing systems for replacing electrodes in spot welding clamps are not automated, requiring manual intervention and inefficiencies in the process.
Innovation Solution
A system with a cam mechanism and index finger that allows for automatic extraction of electrodes from a spot welding gun, utilizing a rotary jaw device with a cam track to grip and rotate the electrode for separation from the clamp, and gravity-assisted evacuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual electrode replacement is used, then device complexity is reduced, but productivity decreases and loss of time increases
Solution Approach 1:
The system enables automatic electrode extraction through self-contained mechanical components. The cam mechanism and index finger work together to automatically grip, rotate, and eject the electrode without external intervention, making the replacement process self-service and eliminating manual operations.
Solution Approach 2:
The extraction system employs dynamic mechanical components including a rotatable jaw mounted on a rotating housing. The cam mechanism converts rotational motion into the sequential gripping and rotating actions needed for electrode extraction, creating a dynamic automated system that replaces static manual operations.
2Loss of time
If automatic extraction system is implemented, then loss of time is reduced, but device complexity increases
Solution Approach 1:
The cam mechanism is pre-configured with a specific profile that automatically guides the index finger through the correct sequence of actions (gripping, rotating, releasing). This preliminary design of the cam profile ensures that the electrode extraction follows the optimal time-efficient path without requiring complex control systems.
Solution Approach 2:
The index finger acts as an intermediary element between the cam mechanism and the electrode. It transfers the motion generated by the cam to the electrode, enabling automatic extraction while simplifying the overall system architecture by decoupling the cam mechanism from direct electrode contact.
3Manufacturing precision
If jaw rotation is used for electrode separation, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The jaw is designed with asymmetric features including a single index finger positioned at a specific location on the housing circumference. This asymmetric configuration creates a controlled rotation path that ensures precise electrode breaking while simplifying the mechanism compared to symmetric multi-finger designs.
Solution Approach 2:
The electrode breaking function is segmented into distinct phases: gripping by the jaw, rotation of the jaw, and separation. This segmentation allows each component to be optimized for its specific function, with the jaw dedicated to gripping and rotating, while the housing provides the rotation mechanism, reducing overall complexity.
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
Enables efficient, automatic replacement of worn electrodes, improving the efficiency and speed of the electrode replacement process without manual intervention.
Implementation Method 1
a cam forming a closed path around the main axis. The cam may include a groove adapted for the index to travel through
Implementation Method 2
an outlet orifice disposed below the jaw to allow gravity evacuation of the electrode, when it has been extracted
Data Source
Figure 1
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AI summary
The invention relates to a system for extracting an electrode from a welding clamp, comprising: - a frame mounted for rotation R8 around an axis X2; - a controlled jaw 12 and another jaw 11 mounted on the frame, on either side of the axis, - means 32 for moving the controlled jaw 12 so that when the frame makes a turn around the axis it approaches and then moves away from this axis.