Automated Welding Line Selection from 3D CAD Data
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Solution Overview
Problem
Existing methods for selecting welding lines for a welding robot from three-dimensional CAD data are inefficient, as operators must manually select from multiple candidates, leading to difficulties in accurately choosing the necessary lines and requiring cumbersome pre-setting operations.
Innovation Solution
An automated method that selects welding lines by grouping faces, extracting edge lines, identifying weldable edges based on normal vectors, calculating intersections, and integrating these into continuous lines, while allowing for edge line displacement to improve accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual selection of welding lines from multiple candidates is performed, then the operator can choose specific welding lines, but the selection process becomes troublesome and time-consuming
Solution Approach 1:
The system automatically extracts edge lines and generates welding line candidates without requiring operator intervention. The control device performs automated processing of CAD data to identify potential welding lines, eliminating the need for manual selection and significantly reducing the time and effort required for welding line preparation.
Solution Approach 2:
The system pre-extracts edge lines from CAD data and prepares welding line candidates before the actual welding operation. By performing these preparatory actions in advance, the system eliminates the need for time-consuming manual selection during the welding process setup.
2Adaptability or versatility
If multiple welding line candidates are extracted, then more options are available for selection, but the complexity of selecting the correct lines increases
Solution Approach 1:
The system replaces the manual mechanical selection process with automated computational processing. The control device uses algorithms to automatically evaluate and filter welding line candidates based on predefined criteria, substituting human judgment with automated decision-making to reduce selection complexity while maintaining versatility.
Solution Approach 2:
The system extracts only the most relevant edge lines that meet specific criteria from the CAD data. By applying filtering conditions during the extraction process, the system isolates suitable welding line candidates while excluding irrelevant lines, thereby reducing the number of options the operator must evaluate without sacrificing adaptability.
3Force
If pre-setting of welding line candidates in CAD is performed, then welding line options are prepared in advance, but the setting operation becomes troublesome and inefficient
Solution Approach 1:
The system performs automatic extraction and filtering of welding line candidates without requiring operator input for pre-setting. The control device autonomously processes CAD data to generate welding line candidates, eliminating the troublesome manual pre-setting operations while maintaining efficient preparation of welding line options.
Solution Approach 2:
The system replaces manual pre-setting operations with automated computational processing. The control device uses algorithms to automatically identify and prepare welding line candidates from CAD data, substituting inefficient manual setting operations with high-speed automated processing that significantly improves preparation efficiency.
Data Source
AI summary
A welding line can be rapidly extracted using three-dimensional CAD data constituted of a large number of line sections containing welding line candidates. The method of choosing a welding line includes: a step (S110) of specifying one face (first face constituting a reference face) from two faces of a member where a welding line is to be formed; a step (S120) of specifying the other face (second face constituting a groove face) from the two faces of the number where a welding line is to be formed; a step (S130) of extracting an edge line; a step (S140) of selecting an edge line zone where welding is possible; a step (S150) of creating welding line information by unifying edge lines where welding is possible; and a step (S160) of correcting welding line information in accordance with the groove shape.