Pipe Alignment Jacks for Internal Surface Welding Precision
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Solution Overview
Problem
Existing methods for welding tubes end-to-end lack precise alignment of internal surfaces, leading to suboptimal contact and defective welds due to variable tube shapes and sizing tolerances, resulting in increased quality control costs and repair issues.
Innovation Solution
A method utilizing independently controlled sets of jacks around each tube, based on geometric measurements, to align and clamp the internal surfaces of tubes, ensuring precise positioning and synchronization during the welding process, with hydraulic or electric actuators and a programmable controller to achieve optimal alignment and clamping pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional clamping assemblies are used to align tubes, then the general shape and outer diameter are matched, but the internal surfaces do not align properly resulting in poor welding contact
Solution Approach 1:
The positioning system is divided into multiple independent jack units distributed around the tube circumference. Each jack can be controlled independently to adjust the position of tube sections, allowing precise alignment of internal surfaces while maintaining overall system manageability through modular architecture.
Solution Approach 2:
Different regions of the tube are positioned with different precision requirements. The invention applies localized adjustment at specific zones where internal surface alignment is critical for welding, rather than uniformly positioning the entire tube. This focuses resources on achieving precise internal surface contact where it matters most for weld quality.
2Measurement precision
If multiple jacks are used to improve positioning precision, then internal surface alignment improves, but the control system becomes more complex
Solution Approach 1:
The jack units are designed as universal, interchangeable components that can be used at multiple positions around both tubes. Each jack performs the same basic function of positional adjustment, but can be independently controlled based on specific alignment requirements at its location. This standardization simplifies the control system architecture while maintaining high positioning accuracy.
Solution Approach 2:
The system incorporates measurement devices that detect the geometric characteristics of tube ends and provide feedback to the control system. This feedback mechanism allows the controller to automatically adjust jack positions to achieve precise internal surface alignment, reducing the need for complex manual coordination and simplifying the overall control strategy.
3Reliability
If independent control of jacks is implemented for precise alignment, then welding quality improves, but the operation becomes more complex
Solution Approach 1:
The system incorporates automated measurement and control capabilities that allow the positioning system to self-adjust based on detected tube geometric characteristics. The measurement devices automatically identify alignment requirements and the control system autonomously coordinates jack movements, reducing the skill level and effort required for operation while maintaining high weld quality.
Solution Approach 2:
The system performs preliminary measurement of tube geometric characteristics before the actual positioning operation. By pre-characterizing the tube geometry and calculating required adjustments in advance, the system simplifies the operational phase where jacks are actuated according to predetermined parameters, making the process more straightforward and reliable.
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
This method significantly improves weld quality by ensuring precise alignment of internal surfaces, reducing defects and associated costs, and enabling efficient and reliable welding even under high tensile forces, such as those encountered in offshore applications.
Implementation Method 1
Mechanical screwing makes it possible to exert practically point pressures in as many zones as there are cylinders around the tube. This makes it possible to shape the tube, for example to round off a portion of this initially ovoid tube.
Data Source
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AI summary
The invention relates to a method for the axial positioning of a first pipe in relation to a second pipe in order to weld said pipes at the ends thereof, the faces of which are first machined and define a sealing surface. According to the invention, a plurality of jacks (1, 2) are distributed around the first and second pipes, said jacks (1, 2) being connected to a central processing and control unit. The movement of each of the jacks (1, 2) in relation to the external surfaces of the first and/or second pipe is controlled in order to align and centre the internal end surfaces of the first and second pipe. The invention also relates to an associated device.