Rotary Manifold Brazing Cell for Continuous Tube Joint Automation
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Solution Overview
Problem
Traditional hand-brazing of aluminum tubes in manifolds is labor-intensive and expensive, lacking efficiency and automation.
Innovation Solution
An automated brazing system with a rotating platform and three fixture frames positioned 120 degrees apart, featuring automatically-controlled brazing torches and temperature control, allowing for simultaneous loading, brazing, and cooling processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If hand-brazing is used for aluminum tubes in manifolds, then labor flexibility is maintained, but labor intensity and cost increase significantly
Solution Approach 1:
The brazing system is divided into three separate fixture frames positioned 120 degrees apart on a rotating platform, with each frame dedicated to a specific stage (loading, brazing, cooling). This segmentation allows complex automation to be distributed across multiple simple, identical modules rather than one complex monolithic system.
Solution Approach 2:
The system uses a rotating platform to dynamically transition fixture frames between different operational positions. The rotation mechanism allows the system to adapt its configuration automatically, with each fixture frame serving different functions at different times in the rotation cycle, reducing the need for complex static positioning systems.
2Productivity
If hand-brazing is used, then operational flexibility is maintained, but productivity and efficiency decrease
Solution Approach 1:
The rotating platform enables continuous operation by ensuring that while one fixture frame is being loaded, another is being brazed, and a third is cooling. This eliminates idle time between operations and maintains continuous productive action across all three stations simultaneously.
Solution Approach 2:
The system prepares the next fixture frame for brazing while the current frame is still being brazed. Loading, positioning, and preheating operations are performed in advance on subsequent frames, ensuring that when a frame reaches the brazing position, all preparatory work is already complete and ready for immediate brazing.
3Manufacturing precision
If manual brazing is performed, then adaptability to different joint positions is maintained, but temperature control precision and joint quality consistency deteriorate
Solution Approach 1:
Temperature sensors are integrated into the brazing system to continuously monitor the temperature at the joint being brazed. This feedback is transmitted to the controller, which automatically adjusts the brazing parameters in real-time to maintain precise temperature control and ensure consistent joint quality across all brazing operations.
Solution Approach 2:
The system uses automated torch positioning and temperature control mechanisms that operate autonomously without manual intervention. The controller automatically manages torch movement, heating power, and cooling rates, eliminating the variability introduced by manual operation and ensuring consistent results.
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 significantly reduces labor costs and increases efficiency by automating the brazing process, ensuring precise temperature control and consistent joint quality across multiple tubes.
Implementation Method 1
automatically-controlled brazing torches move to the desired joints and perform the brazing operation
Implementation Method 2
three fixture frames disposed 120 degrees apart on a rotating platform
Data Source
AI summary
A system for automatically brazing joints in a manifold has a loading station, a brazing station, and a cooling station. The brazing station has a plurality of brazing torches moveable to a joint in the manifold to braze the joint. First, second and third fixture frames extend from a common rotatable platform. The platform rotates each of the fixture frames to each of the loading station, brazing station, and cooling station in turn. The fixture frames support manifolds with joints requiring brazing. The torches are disposed on a lifting platform that lifts the torches up to a desired joint. The lifting platform is disposed on a sliding platform that slides the torches horizontally to the desired joint. The torches surround the joint and braze it from all sides simultaneously. While brazing is being performed at the brazing station, loading and unloading of manifolds may be done at the loading station, and cooling of already-brazed manifolds may take place at the cooling station.