Brazing Pipe End with Filler Metal Ring for Precise Joining
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Solution Overview
Problem
Existing methods for brazing pipe end portions to counter members are inefficient, leading to waste of materials, high production costs, and inaccuracies in positioning the brazing filler metal, which can result in narrowed flow channels and incomplete connections.
Innovation Solution
A method involving the use of a ring-shaped engaging portion on the pipe end, with a brazing-filler-metal-made ring that is easily positionable and meltable, ensuring precise brazing at the desired location without excess material waste, by forming a noncircular shape to securely attach the pipe end to the counter member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pipe member and counter member are immersed in melted metal to cover the entire surface, then the connection is secure, but material waste increases and production cost rises
Solution Approach 1:
The patent applies local quality by providing the brazing filler metal ring only at the specific abutment portion where the pipe end portion meets the counter member, rather than covering the entire surface. This localized application of filler metal ensures secure brazing at the critical connection point while avoiding unnecessary material usage on non-critical surfaces, thus resolving the contradiction between connection security and material waste.
2Ease of manufacture
If the brazing filler metal is not positioned by securing, then the application is simple, but the filler metal shifts to incorrect positions during brazing
Solution Approach 1:
The patent employs preliminary action by pre-positioning the brazing filler metal in a ring shape around the engaging portion of the pipe end portion before the brazing operation. This preliminary positioning ensures that the filler metal is already in the correct location at the abutment portion, preventing any shift during the brazing process and achieving precise positioning without complex securing mechanisms.
3Reliability
If excess melted metal remains at the connected part, then the brazing is complete, but the flow channel becomes narrowed
Solution Approach 1:
The patent applies local quality by confining the brazing filler metal to the specific abutment portion through the ring-shaped configuration. This localized application ensures that the filler metal is present only where needed for the brazing connection, completing the brazing process reliably while preventing excess metal from entering and narrowing the flow channel, thus resolving the contradiction between brazing completeness and flow channel restriction.
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 allows for secure, cost-effective brazing at the precise location, reducing material waste and ensuring accurate connections without obstructing flow channels, while simplifying the manufacturing process by eliminating the need for extensive metal coverage and positioning checks.
Implementation Method 1
heating and melting the brazing-filler-metal-made ring of the pipe end portion
Implementation Method 2
securing by brazing the pipe end portion to the counterpart member
Data Source
AI summary
A method of brazing a pipe member to a counterpart member includes steps of mounting in a circumferential direction an engaging portion in a ring shape to an outer periphery of the pipe end portion proximate an endmost portion of the pipe member, engaging a brazing-filler-metal-made ring in a ring shape with the engaging portion, inserting the pipe end portion of the pipe member provided with the brazing-filler-metal-made ring into the counterpart member, heating and melting the brazing-filler-metal-made rug with the outer peripheral surface of the pipe end portion being in abutment with the inner peripheral surface of the counterpart member, pouring a brazing filler metal into an abutment portion between the outer peripheral surface of the pipe end portion and the inner peripheral surface of the counterpart member, and securing by brazing the pipe end portion to the counterpart member.