Laser Welding Device with Transparent Fixing Member
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Solution Overview
Problem
Existing laser welding technologies face challenges in maintaining a consistent fusion point when joining thermosetting resin parts, particularly due to variations in the thickness of the non-laser-transmitting resin layers during the fusion process.
Innovation Solution
A laser welding device is designed with a fixing member made of transparent material, such as quartz glass, to support the laser-transmitting resin layer, and a pressing member to maintain the non-laser-transmitting resin layer in close contact, ensuring a consistent fusion point. Additionally, a refracting member is used to redirect the laser beam around obstacles, ensuring precise emission to the fusion point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the laser light source is positioned to emit laser to a fusion point between resin parts, then the resin parts can be fuse-joined together, but when the thickness of the non-laser-transmitting resin layer varies during fusion, the fusion point moves and laser precision deteriorates
Solution Approach 1:
A transparent fixing member is introduced as an intermediary component between the laser-transmitting resin layer and the support structure. This fixing member has a predetermined thickness that compensates for thickness variations in the resin layers, thereby maintaining consistent fusion point positioning despite variations in resin layer thickness during the fusion process
2Manufacturing precision
If a transparent fixing member with predetermined thickness is used to support the laser-transmitting resin layer, then the fusion point position is maintained consistently, but the device structure becomes more complex
Solution Approach 1:
The transparent fixing member is designed with uniform thickness throughout, providing consistent support and maintaining the fusion point position. This homogeneous structure simplifies the overall design compared to complex adjustable mechanisms, achieving precision through simplicity and material uniformity
3Device complexity
If the laser light source is disposed on one side of the fusion target, then the setup is simple, but obstacles may block the laser path to the fusion point
Solution Approach 1:
The laser light source is positioned in the axial direction (one-dimensional approach) rather than requiring complex lateral positioning. This dimensional simplification maintains setup simplicity while the transparent fixing member ensures clear laser path by providing structural support that prevents obstacle interference
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 solution effectively maintains a consistent fusion point even as the thickness of the non-laser-transmitting resin layers reduces, improving the quality of the laser fusion process. The refracting member ensures that the laser can reach the fusion point even when obstacles are present, maintaining precision and quality without adjusting the laser intensity.
Implementation Method 1
a fixing member in contact with one surface of the first part and supporting one side of the first part, wherein the fixing member is made of a transparent material through which the laser is transmitted
Implementation Method 2
a refracting member disposed between a laser light source and a fusion point and refracting a laser for the laser to reach the fusion point even when an obstacle is disposed between the laser light source and the fusion point
Implementation Method 3
a laser light source disposed to be spaced apart from the one side of the fusion target and emitting a laser to one surface of the second part to fuse the second part
Data Source
AI summary
Provided is a laser welding device using a laser to fuse resin material parts to each other, and more particularly, a thermosetting resin laser welding device fixing a fusion target by using a transparent fixing member to perform fusion while a laser is emitted to an exact fusion point, and capable of emitting the laser to the fusion point by using a refraction of the laser even when an obstacle is present in a straight line between a laser light source and the fusion point.