Finishing Device With Segmented Arm For Weld Bead Removal
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Solution Overview
Problem
Existing finishing devices for removing weld beads from small door or window frames are limited by the need for a sturdy support arm, which restricts the minimum frame size that can be processed and makes it difficult to efficiently machine inner corners.
Innovation Solution
A finishing device with a machining arm composed of multiple hinged arm elements, utilizing an industrial robot arm for high mobility and featuring rotationally-driven tools with lateral contact side members, allowing for precise machining of complex profiles without overloading the arm elements, and enabling the use of smaller support arms for increased flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a sturdy support arm is used to remove weld beads, then the blade can effectively remove weld beads and chips, but the support arm becomes large and limits the minimum frame size that can be processed
Solution Approach 1:
The support arm is divided into multiple hinged arm elements (first arm element, second arm element, etc.) that can be positioned independently. This segmentation allows the arm to maintain structural strength when needed while being able to fold or reconfigure to access inner corners and small frame areas, resolving the contradiction between sturdiness and flexibility.
Solution Approach 2:
The support arm transitions from a static, rigid structure to a dynamic, multi-jointed mechanism. The hinged connections between arm elements allow the arm to adapt its configuration dynamically - extending for strength when working on outer surfaces, and folding or articulating to reach inner corners and small frames, thus resolving the contradiction between mechanical sturdiness and adaptability.
2Strength
If a large support arm is used to provide mechanical sturdiness, then the blade can work effectively, but the tool cannot reach into the inner area of small frames
Solution Approach 1:
The support arm is divided into multiple hinged arm elements (first arm element, second arm element, etc.) that can be positioned independently. This segmentation allows the arm to maintain structural strength when needed while being able to fold or reconfigure to access inner corners and small frame areas, resolving the contradiction between sturdiness and flexibility.
Solution Approach 2:
The multi-jointed arm structure adds angular/rotational dimensions to the arm's movement capability. Instead of being limited to linear extension, the hinged elements allow the arm to reach into inner areas by articulating through multiple angles and planes, effectively increasing reach without requiring a longer overall arm length.
3Productivity
If a passively drawn blade is used on the support arm, then the blade can remove weld beads, but too high mechanical load is placed on the arm elements
Solution Approach 1:
The passively drawn blade is replaced with a rotationally driven machining tool. Instead of relying on the mechanical force of the support arm to push the blade through the weld bead, a rotational drive system provides the cutting action. This substitution dramatically reduces the mechanical load on the arm elements while maintaining or improving weld bead removal effectiveness.
Data Source
AI summary
The invention relates to a finishing device for removing the weld bead generated during welding of a window or door frame or frame section at the mitered surfaces, wherein the finishing device comprises a support surface for the frame or frame section and a processing arm for supporting a tool holder, and the processing arm consists of a plurality of arm elements that move in hinged fashion relative to one another but can also be fixed in place, wherein the tool holder comprises at least two cutting tools driven by a rotational drive, said tools rotating about a tool axis and at least one tool laterally next to the blade of the tool, contact sides.