Developing Blade Laser Welding Speed Control

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

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

VSEngineering 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

Engineering Contradiction:
Improveweld mark size uniformityVSAvoidlaser beam movement control
Core Design Contradiction:
Manufacturing precisionVSEase of operation

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.

Inventive Principle:
Principle #10Preliminary action

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

Engineering Contradiction:
Improveweld mark size consistencyVSAvoidwelding speed
Core Design Contradiction:
Manufacturing precisionVSProductivity

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.

Inventive Principle:
Principle #15Dynamics

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

Methodology Applied
Scientific EffectLaser beam welding: Laser Beam Welding

Data Source

PatentUS9427825B2Developing device, blade assembly, and developing device manufacturing method
Publication Date: 2016.08.30 BROTHER KOGYO KK
  • US9427825B2 patent drawing
  • US9427825B2 patent drawing
  • US9427825B2 patent drawing

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.