Welding Target Position Measurement Device for Complex Grooves
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Solution Overview
Problem
Existing welding techniques face challenges in accurately setting the welding target position for subsequent passes, especially in complex groove shapes and multiple pass per one layer welding methods, leading to inconsistencies in weld bead shapes and difficulties in obtaining precise welding target position information.
Innovation Solution
A welding target position measurement device that includes groove shape measurement, recording, and processing sections to adjust and calculate shape changes, detect groove walls and weld bead ends, and select the target position based on past and current shape data, enabling accurate selection of the welding target position for subsequent passes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple pass per one layer welding method is adopted for complex groove shapes, then welding coverage and adaptability are improved, but measurement precision of welding target position deteriorates
Solution Approach 1:
The system performs preliminary measurement of the groove shape before welding using a laser measurement system, and pre-calculates the welding target position based on the measured groove geometry. This preliminary action enables accurate target position determination before the actual welding process begins, resolving the measurement precision issue in complex grooves.
Solution Approach 2:
The patent replaces conventional mechanical contact measurement methods with a laser measurement system that uses optical fields to measure groove shapes. This substitution enables non-contact, high-precision measurement of complex groove geometries, improving measurement precision while maintaining adaptability to various groove types.
2Ease of manufacture
If welding target position is set based on groove shape information, then measurement process is simplified, but manufacturing precision of weld bead shape deteriorates
Solution Approach 1:
The system establishes a feedback loop where the measured groove shape information is used to calculate the welding target position, and this calculated position is then used to guide the welding process. After welding, the actual weld bead shape is measured and compared with the target, enabling continuous refinement of the measurement and positioning process to improve weld bead precision.
Solution Approach 2:
The patent dynamically adjusts welding parameters including the target position based on the measured groove shape parameters. By changing the target position parameter according to actual groove geometry rather than using fixed positions, the system maintains manufacturing precision of weld bead shapes while keeping the measurement process simple.
3Ease of operation
If folding point detection method is used for multiple pass welding, then operation ease is improved, but measurement precision of welding target position deteriorates
Solution Approach 1:
The patent replaces manual visual detection of folding points with an automated laser measurement system that objectively measures groove shapes and calculates target positions. This substitution maintains operational ease through automation while dramatically improving measurement precision by eliminating human subjectivity and error in folding point detection.
Data Source
AI summary
According to an embodiment, a welding target position measuring device comprises: a groove wall welding part detection means for detecting a groove wall welding part based on a result of the calculation performed by a groove shape change amount calculation means; a weld bead end detection means for detecting a weld bead end based on a result of the calculation performed by a groove shape difference amount calculation means; and a welding target position selection means for obtaining a welding pass number of a subsequent pass in a welding information stored in a welding information recording means and selecting a welding target position of the subsequent pass which differs depending on welding positions based on results of the detection of the groove wall welding part and the weld bead end.