Welding Path Coordinate Correction for Uniform Bead Spacing
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Solution Overview
Problem
In 3D printing with slab metal materials, the complexity of the deposited object's shape often leads to uneven bead heights and non-welded portions due to variations in bead width and deposition path arrangement, resulting in instability and defects in the welding process.
Innovation Solution
A control information generation device that acquires coordinate information on passing points in the deposition path, applies a repulsion force to adjacent points to calculate their movement and achieve dynamic equilibrium, and updates the path to ensure uniform intervals between beads, thereby stabilizing the welding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the depositing path is corrected by changing bead width to achieve uniform path arrangement, then the uniformity of path arrangement is improved, but the welding condition changes and control becomes complicated
Solution Approach 1:
The patent changes the parameter being adjusted from bead width to path position. Instead of modifying the bead width to achieve uniform path arrangement, the system adjusts the positional coordinates of passing points along the depositing path. This parameter substitution simplifies control because it maintains constant welding conditions (bead width, deposition speed, heat input) while achieving the desired uniform path arrangement through coordinate transformation only.
2Manufacturing precision
If the bead width is changed to correct the depositing path, then the path arrangement uniformity is improved, but the welding process stability deteriorates due to sudden condition changes
Solution Approach 1:
The patent substitutes the parameter of bead width adjustment with path position adjustment. By modifying only the positional coordinates of passing points while keeping all welding parameters (bead width, deposition speed, heat input) constant, the system achieves uniform path arrangement without causing sudden changes in welding conditions, thereby maintaining welding process stability and reliability.
3Manufacturing precision
If the depositing path is corrected by changing bead width, then the path arrangement is improved, but the calculation complexity increases
Solution Approach 1:
The patent changes the correction approach from modifying bead width (which requires complex recalculation of welding parameters, heat input, and deposition dynamics) to adjusting path coordinates (which involves only geometric transformation). This parameter substitution significantly reduces calculation complexity while achieving the same goal of uniform path arrangement.
Data Source
AI summary
A control information generation device includes: a coordinate information acquisition unit configured to acquire coordinate information on a plurality of passing points in a path; a movement amount calculation unit configured to set a repulsion force applied to adjacent passing points among the passing points, and obtain, when the set repulsion force is applied to the passing point, a movement amount of the passing point from a position before the repulsion force is applied to a position where the passing point is in dynamic equilibrium by calculation for the plurality of passing points; a path update unit configured to update the path by correcting coordinates of the plurality of passing points according to the movement amount; and a control information output unit configured to output information on the updated path.