Diffusion Bonding Jigs With Atmosphere Communication Paths
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Solution Overview
Problem
The bonding of laminated metallic plates using diffusion bonding can result in air trapped within the ink flow path, leading to increased inner pressure and potential failure of adhesion or distortion due to non-uniform temperature distribution when heated.
Innovation Solution
A method involving jigs with an atmosphere communication path that allows air to escape from the inner cavity before heating, preventing pressure buildup and ensuring uniform temperature distribution during the bonding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If diffusion bonding is used to bond metallic plates, then bonding efficiency is improved and bonding step is simplified, but air remains in the ink flow path causing bonding failure or distortion
Solution Approach 1:
The patent introduces a vacuum treatment step before diffusion bonding to remove air from the ink flow path in advance. By creating a vacuum environment prior to bonding, air bubbles are evacuated from the sealed flow path, preventing subsequent bonding failures and distortions while maintaining the efficiency benefits of diffusion bonding
2Temperature
If the laminated body is heated during diffusion bonding, then bonding is achieved, but air expansion increases inner pressure causing adhesion failure
Solution Approach 1:
The patent applies vacuum treatment before heating to remove air from the flow path. By evacuating air prior to the heating process, there is no air to expand when temperature increases, thus preventing pressure buildup and adhesion failure during the thermal bonding process
3Reliability
If air is removed from the inner cavity before bonding, then bonding quality is improved, but additional process steps are required
Solution Approach 1:
The patent combines the vacuum treatment step with the existing diffusion bonding process by performing vacuum evacuation before placing the laminated body in the bonding furnace. This integration approach removes air without requiring separate dedicated equipment or complex additional process steps, maintaining simplicity while improving bonding quality
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 approach effectively prevents bonding failures and distortions by ensuring air is released, allowing for reliable adhesion of metallic plates without the need for additional steps to create atmosphere communication paths on the laminated body, thus simplifying the manufacturing process.
Implementation Method 1
metallic atoms are mutually diffused in bonding surfaces of the metallic plates
Implementation Method 2
the plurality of metallic plates are applied to pressure while being heated at a high temperature (about 1000° C.) in vacuo. Thereby, metallic atoms are mutually diffused in bonding surfaces of the metallic plates
Implementation Method 3
If this laminated body is heated, since air remaining in the ink flow path is expanded to increase the inner pressure
Implementation Method 4
the plurality of metallic plates are applied to pressure while being heated at a high temperature (about 1000° C.) in vacuo. Thereby, metallic atoms are mutually diffused in bonding surfaces of the metallic plates and finally, the metallic plates are bonded to each other
Data Source
AI summary
A method for bonding metallic plates includes: sandwiching a laminated body, which includes a plurality of metallic plates and is formed with an inner cavity opening on a surface thereof, between a pair of jigs each having a flat abutment surface abutting against respective surfaces of the laminated body, wherein at least one of the jigs is formed with an atmosphere communication path, which communicates with the inner cavity and atmosphere; and heating the laminated body while applying pressure to the laminated body with the pair of jigs in a lamination direction of the laminated body.