Large-Diameter Pipe Laser Welding With Stable Circumferential Rotation
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Solution Overview
Problem
Conventional laser welding machines experience inaccuracies due to linkage assembly-induced shaking and are unsuitable for large-diameter pipes, leading to increased manufacturing and space requirements.
Innovation Solution
A laser welding device comprising a hanging unit with semi-circular pieces, a rotary displacement unit, and a welding unit, which allows for circumferential rotation around the pipe, ensuring stable welding without shaking, and is designed for large-diameter pipes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a linkage assembly is used to enable three-dimensional position and angle changes, then the laser welding machine can adjust its position, but the linkage assembly causes shaking and misalignment during welding
Solution Approach 1:
The patent removes the linkage assembly from the system entirely. Instead of using a complex linkage mechanism for position adjustment, the invention uses a simplified structure where the laser welding device is directly mounted on a movable platform that can be positioned without mechanical linkages, thereby eliminating the shaking and misalignment problems caused by linkage movement
Solution Approach 2:
The patent divides the positioning function into separate components: the movable platform handles position adjustment, while the laser welding device remains fixed on the platform. This segmentation allows position changes without affecting the welding device's stability and alignment
2Adaptability or versatility
If the laser welding machine is designed for large-diameter pipes, then it can process larger workpieces, but the machine size and manufacturing costs increase
Solution Approach 1:
The patent employs a movable platform that can dynamically adjust its position around large-diameter pipes. This dynamic positioning system allows a compact laser welding device to process large workpieces by moving the platform rather than requiring a large fixed machine structure, thereby reducing device complexity and manufacturing costs while maintaining adaptability for large-diameter pipes
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides stable and accurate welding of large-diameter pipes with reduced manufacturing and space costs by simplifying assembly and enhancing mobility.
Implementation Method 1
A motor is connected to a gear. The gear is connected to the two arc-shaped rack bars of the hanging unit
Implementation Method 2
The conventional laser welding machine 9 uses a laser generator to produce a beam, which undergoes beam expansion, reflection, and focusing before being radiated onto the surface of a workpiece 91
Implementation Method 3
The surface heat conducts through the workpiece, causing it to melt and form a specific weld pool
Data Source
AI summary
A laser welding device for large-diameter pipes includes a hanging unit which consists of two semi-circular pieces. A rotary displacement unit includes a gear. A welding unit includes a welding gun and a fixed base. The welding gun is connected to the fixed base, and the rotary displacement unit is connected to the fixed base. By hanging the hanging unit on a first workpiece, and butt-joining a second workpiece to the first workpiece, the rotary displacement unit drives the welding unit, enabling the rotary displacement unit and the welding unit to rotate circumferentially along the q arc-shaped rack bars of the hanging unit to perform pipe welding.