Three-Axis Welding Head Layout for Higher Rigidity
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Solution Overview
Problem
Existing welding devices with multi-degree of freedom robotic arms suffer from poor rigidity and stability, leading to inaccurate control of the welding head and reduced welding accuracy.
Innovation Solution
A welding device with a frame body, first, second, and third movable modules, and a welding module, where the movable modules provide three degrees of freedom, allowing the welding module to be suspended outside the frame body while the first movable module is positioned within the frame body to minimize distance and enhance rigidity and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-degree of freedom robotic arm is used to support the welding head, then the welding device can achieve complex motion and positioning, but the rigidity and stability are poor, making it difficult to accurately control the position of the welding head
Solution Approach 1:
The welding device is divided into three independent movable modules, each providing one degree of freedom. This segmentation allows each module to be optimized for its specific function while maintaining overall system flexibility, resolving the contradiction between motion capability and stability.
Solution Approach 2:
The patent transitions from a traditional vertical robotic arm structure to a horizontal layered structure where movable modules are arranged side-by-side. This dimensional change enables the welding head to achieve complex 3D motion through horizontal arrangement of modules, improving rigidity while maintaining versatility.
2Adaptability or versatility
If a multi-degree of freedom robotic arm is used, then the welding device can perform complex welding tasks, but the structure becomes complex, difficult to control, and costly
Solution Approach 1:
The complex robotic arm is segmented into three simple movable modules, each with a single degree of freedom. This segmentation simplifies the control system for each module while maintaining the overall capability to perform complex welding tasks through coordinated motion of all modules.
Solution Approach 2:
Three simple movable modules are merged together to achieve the functionality of a complex multi-degree of freedom robotic arm. This combining approach reduces individual module complexity while achieving the desired versatility through their coordinated operation.
3Length of moving object
If the welding module is suspended outside the frame body with long distance, then the welding head has greater movement range, but the rigidity and stability of the device decrease
Solution Approach 1:
The patent changes the spatial arrangement from vertical suspension to horizontal layering of movable modules. This allows the welding head to achieve greater movement range through the coordinated horizontal displacement of multiple modules while keeping each module compact and rigid within the frame body.
Data Source
AI summary
A welding device includes a frame body, a first movable module, a second movable module, a third movable module, and a welding module. The first movable module is installed on the frame body and movable in a first horizontal direction. The second movable module is installed on the first movable module and movable in a second horizontal direction perpendicular to the first horizontal direction. The third movable module is installed on the second movable module and movable in a vertical direction perpendicular to the first and second horizontal directions. The welding module is installed on the third movable module and movable together with the first, second, and third movable modules. The welding module is suspended outside the frame body, and the first movable module is provided in an inner chamber of the frame body to reduce the distance between the welding module and the frame body.