Weld Pass Interference Detection Using 3D CAD Wall Models
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Solution Overview
Problem
Conventional welding technologies fail to effectively address interference issues at the ends of members being welded, where obstructions from other objects can hinder the welding process, leading to incomplete or inefficient welding operations.
Innovation Solution
A method and system that utilize 3D CAD data to extract weld pass information, positioning a wall surface determination model to assess potential interference from other members, allowing the welding robot to adjust its operation and ensure smooth welding by determining whether a wall surface or scallop interferes with the weld pass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional welding methods are used without considering weld end interference, then the welding process is simple, but the welding operation is hindered by obstructions at weld ends
Solution Approach 1:
The system performs preliminary analysis of the weld pass by extracting 3D CAD data and positioning wall surface determination models at weld ends before actual welding begins. This advance preparation identifies potential interference from other members, allowing the welding robot to plan its operations to avoid obstructions, thereby ensuring smooth welding operations without adding significant complexity to the overall process.
2Measurement precision
If wall surface determination models are positioned at all weld ends, then interference detection is complete, but processing time increases
Solution Approach 1:
The system applies wall surface determination models selectively at weld ends where interference is likely to occur, rather than uniformly across the entire weld pass. By focusing computational resources on critical locations where other members may obstruct the welding robot, the system achieves accurate interference detection without unnecessarily increasing processing time for the entire welding operation.
Data Source
AI summary
This method for acquiring weld pass information pertaining to execution conditions for a weld pass for welding two workpieces, which are to be welded by the welding robot, includes: a step in which a weld pass for welding the two workpieces is extracted from 3D CAD data; a step in which a wall determination model having a predetermined 3D shape is prepared; a step in which the wall determination model is positioned in the direction extending towards the outside of the weld pass, the end of welding which is the starting point or ending point of the weld pass serving as a reference; and a step in which, for the positioned wall determination model, a determination is made as to whether there is interference from a wall surface demarcated by another member different from the two workpieces.