Rotating Laser Bonding for Uniform Resin Pipe Circumferential Joints
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Solution Overview
Problem
Existing laser bonding methods for resin members are costly and lack versatility, requiring large direction changers for various shapes and sizes, and are inefficient for resin pipes with prohibited sizes or shapes.
Innovation Solution
A laser bonding method and device where a resin pipe and member are fixed to a base, with a light emission unit revolving around the junction to apply laser light, using a pulley or gear system and optionally a reflecting mirror, allowing for easy joining of resin pipes and members of various shapes and sizes without expensive devices, and controlling the revolution speed to maintain consistent welding temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large direction changer with a reflecting surface is provided to surround the junction for laser welding, then laser welding over the entire circumference can be achieved, but manufacturing cost increases significantly
Solution Approach 1:
The patent employs dynamic movement of the light emission unit around the junction instead of using a large static direction changer. The light emission unit rotates or revolves around the junction, dynamically changing its position to apply laser light to different circumferential positions, thereby eliminating the need for a large surrounding reflecting surface
Solution Approach 2:
The patent introduces a reflecting mirror as an intermediary component that works in conjunction with the moving light emission unit. The reflecting mirror redirects laser light from the light emission unit to the junction at appropriate angles, enabling effective welding without requiring the light emission unit to directly face the junction throughout its entire path
2Adaptability or versatility
If a new direction changer is manufactured for each resin member size or shape, then laser welding can be performed on various members, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent creates a universal laser bonding device that can handle resin members of various shapes and sizes through the rotational movement of the light emission unit. By adjusting the radius of revolution and rotation speed, the same device configuration can weld different member geometries without requiring custom direction changers for each case
Solution Approach 2:
The dynamic rotational movement of the light emission unit allows the device to adapt to different member geometries. The radius of revolution and rotation speed can be adjusted based on the member size and shape, providing versatility without requiring physical reconfiguration of the device structure
3Reliability
If the light emission unit rotates on its axis while revolving around the junction, then welding coverage is maintained, but optical fiber distortion occurs
Solution Approach 1:
The patent applies different rotational characteristics to different parts of the light emission unit. The unit revolves around the junction (changing its position) but maintains a fixed orientation (no rotation on its own axis). This local differentiation in rotational behavior ensures welding coverage while protecting the optical fiber from distortion
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
Enables efficient and cost-effective laser welding of resin pipes and members with various shapes and sizes, preventing optical fiber distortion and ensuring strong, uniform joints.
Implementation Method 1
a light emission unit which is configured to emit the laser light
Implementation Method 2
laser welding over the entire circumference of the junction is achieved
Implementation Method 3
fusing and joining the entire outer circumferential surface of the pipe with the entire inner circumferential surface of the member
Implementation Method 4
laser light is reflected on the reflecting surface whose tilt angle has been adjusted
Data Source
AI summary
A resin pipe 30 and a resin member 31 are fixed to a setting portion 5 provided on the front side of a base 6, and a timing pulley 13 which is provided on the back side of the base 6 and to which a light emission unit 3 is attached is rotated. As a result, the light emission unit 3 applies laser light 20 to a junction 32 between the resin pipe 30 and the resin member 31 while revolving around the junction 32. This makes it easy to fuse and join the entire outer circumferential surface of the resin pipe 30 with the entire inner circumferential surface of the resin member 31, which are variously shaped and sized.