Vacuum Seam Guide Assembly for Clean Aluminum Tube Welding
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Solution Overview
Problem
Manufacturing small diameter aluminum tubes with low internal contamination levels is challenging due to high particle emissions during high frequency welding, which exceed acceptable limits for applications like HVAC&R systems.
Innovation Solution
A seam guide assembly and vacuum extraction system are integrated into a welded tube roll forming apparatus to remove solid particles by applying vacuum and back flushing with pressurized gas, ensuring effective contamination removal during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high frequency welding is used to manufacture aluminum tubes, then welding efficiency and productivity are improved, but solid particle emissions inside the tube increase beyond acceptable limits
Solution Approach 1:
The invention extracts harmful solid particles from the tube interior during the welding process by introducing a suction device that removes particles through the seam guide assembly, thereby maintaining high welding efficiency while eliminating contamination
Solution Approach 2:
The seam guide assembly serves as an intermediary component that performs dual functions: guiding the welding seam and simultaneously removing solid particles through integrated vacuum suction, thus mediating between the welding process and contamination control
2Productivity
If small diameter tubes are manufactured, then productivity and cost-effectiveness are improved, but internal contamination levels become difficult to control
Solution Approach 1:
The invention performs preliminary particle removal during the welding process itself, rather than attempting to clean particles after welding is complete. The suction device actively removes particles as they are generated, preventing contamination accumulation in small diameter tubes
3Object-generated harmful factors
If vacuum suction is applied through the seam guide assembly, then particle removal effectiveness is improved, but the complexity of the welding apparatus increases
Solution Approach 1:
The invention merges the particle removal function with the existing seam guide assembly by integrating a suction device and vacuum channel into the guide structure. This combination eliminates the need for separate particle removal equipment, reducing overall system complexity while maintaining effective contamination control
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 system enables the production of high-quality, low-contamination small diameter aluminum tubes suitable for HVAC&R applications by effectively removing internal particles, improving product cleanliness and meeting stringent quality standards.
Implementation Method 1
The outlet opening is configured to be connected to a vacuum source, for example by means of a connection fitting such as threads or bayonet coupling to which a connection part suitable for a vacuum source can be connected. The through channel is configured for removal of emission of solid particles resulting inside the tube due to welding, by means of applying a vacuum at the outlet opening
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A seam guide assembly (1) configured to maintain the longitudinal edges (101) of a metal strip (102), in position before welding the edges together in a welding section (201) of a welded tube roll forming apparatus (200), said seam guide assembly comprising a front seam guide tip component (2), a through channel (6) being provided in the holder (3), said channel having an inlet opening (7) located on said first side (5) of the holder, adjacent the front seam guide tip component (2), and an outlet opening (8) located on a second side (9) of the holder, said outlet opening being configured to be connected to a vacuum source; a welded tube roll forming apparatus (200) comprising a vacuum extraction section (205) configured to extract solid particles produced inside the tube (100) during the high frequency induction welding of the tube edges, and being located in the apparatus at a position where the where the edges (101) of the roll formed tube have not yet been welded together; and a method of manufacturing a tube comprising extracting solid particles produced inside the tube (100) during the high frequency induction welding by application of vacuum at a section (205) of the tube, where the edges (101) of the roll formed tube have not yet been welded together.