Developing Blade Laser Welding Speed Control
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Solution Overview
Problem
Variations in weld mark size due to inconsistent laser beam movement speed during welding of a blade to a supporting member in a developing device lead to uneven pressure contact with the developing roller, affecting the quality of the blade assembly.
Innovation Solution
Increasing the relative movement speed of the welding laser along the blade and maintaining it constant, with specific weld mark formations at the edge and central positions to ensure uniformity in weld mark size, thereby reducing variations in contact pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the laser beam movement speed is not controlled consistently during welding, then the welding process is simpler to operate, but the weld mark size varies causing uneven pressure contact
Solution Approach 1:
The patent applies preliminary action by pre-establishing a correspondence relationship between positions along the blade and specific movement speeds of the laser beam. Before welding begins, the system stores optimal speed values for different positions (especially slower speeds at start and end positions) in advance. During welding, the controller automatically retrieves and applies the appropriate speed based on current position, ensuring uniform weld marks without requiring manual speed adjustment by the operator.
2Manufacturing precision
If the laser beam movement speed is increased and maintained constant, then the weld marks are more uniform in size, but the welding process takes less time
Solution Approach 1:
The patent applies dynamics by making the laser beam movement speed variable rather than constant. The system dynamically adjusts the movement speed based on the blade position, using slower speeds at the start and end positions where weld marks tend to be larger, and faster speeds in intermediate positions. This dynamic speed adjustment is automatically controlled based on pre-stored correspondence data, achieving uniform weld marks while optimizing the overall welding time.
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 ensures that weld marks formed on the blade and supporting member are substantially the same size, improving the quality of the blade assembly by maintaining consistent pressure contact with the developing roller.
Implementation Method 1
a laser beam is irradiated onto the blade while the laser beam is moved with respect to the blade in the extended dimension of the blade
Data Source
AI summary
A method for welding a developing blade to a supporting member may include increasing a relative movement speed of a welding laser and a developing blade, along a moving direction. The method may include maintaining, upon the welding laser reaching the developing blade, the relative movement speed and initiating irradiation of the welding laser toward the developing blade and the supporting member.


