Single-Sided Welding Head With Movable Electrodes for Complex Joints
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Solution Overview
Problem
Existing single-sided welding heads with fixed or axially movable electrodes are limited in their ability to operate on a wide range of joints, particularly in the automotive industry, due to geometrical incompatibilities and the need for substantial modifications to metal sheets and equipment, which are not always feasible at sustainable costs.
Innovation Solution
A single-sided welding head with movable electrodes that allow for angular, linear, and orthogonal movements, enabling the electrodes to adapt to complex joint geometries by varying their position, alignment, and interaxis distance, allowing for the welding of metal sheets with diverse geometrical singularities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If electrodes are fixed or have only axial movement, then device complexity is reduced, but adaptability to different joint geometries deteriorates
Solution Approach 1:
The patent applies the dynamics principle by transforming fixed electrodes into movable electrodes that can dynamically adjust their positions. The active electrode is equipped with a drive mechanism allowing it to move along the welding line, while the ground electrode can also be positioned independently. This dynamic positioning capability enables the welding head to adapt to various joint geometries including T-joints, corner joints, and lap joints, thereby resolving the contradiction between device simplicity and adaptability.
2Device complexity
If electrode interaxis distance is fixed, then device complexity is reduced, but ease of operation on complex geometries deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the electrode positioning into independent controllable units. The active electrode and ground electrode are positioned independently with separate drive mechanisms, allowing their relative distance and positions to be adjusted separately. This segmentation enables flexible positioning on complex joint geometries without requiring a completely complex integrated positioning system.
3Ease of operation
If single-sided welding head is used, then ease of operation on certain joints is improved, but manufacturing precision deteriorates due to geometric constraints
Solution Approach 1:
The patent implements feedback mechanisms through sensors that detect the actual positions of the electrodes and the workpiece geometry. This feedback information is used to adjust and correct the electrode positions in real-time, ensuring precise welding even when operating on complex joint geometries with the simplified single-sided configuration.
Data Source
AI summary
Described herein is a single-sided welding head including a first welding electrode and a second welding electrode, where the first and second welding electrodes are carried by a body of said welding head. The first welding electrode is movable relative to the body of said welding head at least along a first coordinate of motion. The second welding electrode is movable relative to the body of said welding head at least along a second coordinate of motion; where said first coordinate of motion is a coordinate of angular motion that develops about a first axis of rotation, and said second coordinate of motion is a coordinate of linear motion that develops along a first axis of translation.