Laser-Textured Clutch Bonding Surface for Flatness and Adhesion
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Solution Overview
Problem
Existing multiplate clutch devices face issues with flatness degradation due to uneven recess formation on clutch plates, leading to inconsistent friction member adhesion and drive force transmission.
Innovation Solution
A joint component with a metal base body featuring a flat joint surface and fine recessed portions formed by laser processing, ensuring non-overlapping, uniform density, and minimal depth to maintain surface flatness and reduce residual stress, with a cover layer to prevent lubricant flow interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If sandblasting is used to form recesses on the core plate, then the adhesion strength of the friction member is improved, but the flatness of the core plate is degraded
Solution Approach 1:
The invention changes the formation method of recesses from sandblasting to laser processing, and optimizes parameters such as recess depth (5-20 μm), diameter (30-80 μm), and density (0.5-2.0 per mm²) to achieve both improved adhesion and maintained flatness (within 0.05 mm)
Solution Approach 2:
The invention creates localized recess structures with specific dimensional characteristics (depth, diameter, spacing) that provide enhanced adhesion only where needed, while maintaining overall surface flatness through controlled local modifications rather than uniform surface treatment
2Strength
If many recesses are formed on the core plate to improve adhesion, then the friction member adhesion strength increases, but the uniformity of recess formation decreases
Solution Approach 1:
The invention implements a feedback control system where the laser processing parameters are adjusted based on real-time monitoring of recess formation, ensuring uniform density and distribution. The system controls the number of pulses, pulse interval, and laser power to maintain consistent recess characteristics across the entire surface
Solution Approach 2:
The invention replaces the mechanical sandblasting process with laser processing, which offers superior control over recess formation. The laser method enables precise control of recess depth, diameter, and spacing through programmable parameters, eliminating the randomness and unevenness inherent in sandblasting
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 reduces flatness degradation, enhances friction member adhesion, and improves rotary drive force transmission accuracy and reliability in multiplate clutch devices.
Implementation Method 1
the fine recessed portions are formed by laser light
Data Source
AI summary
Provided are a joint component formed with fine recessed portions, a multiplate clutch device including the joint component, and a joint component manufacturing method. At the joint component, many fine recessed portions are formed at a joint surface joined to a joint object. The joint surface is formed in a circular ring shape along a peripheral direction of the base body, and is formed with a flatness of equal to or less than 0.15 mm. The fine recessed portions are formed at the joint surface such that adjacent ones of the fine recessed portions do not overlap with each other and a formation density per unit area at the joint surface is uniform. The fine recessed portions are formed as laser processing marks formed at the base body by irradiation with laser light.