Laser-Textured Clutch Bonding Surface for Core Plate Flatness
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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 reduced performance.
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 and uniform density of recesses to maintain surface flatness and reduce residual stress, thereby enhancing friction member adhesion and clutch performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If sandblasting is used to form recesses on the core plate, then adhesion strength of friction members is improved, but flatness of the core plate is degraded
Solution Approach 1:
The patent replaces the mechanical sandblasting process with a laser-based process to form recesses on the core plate. This substitution eliminates the harmful effects of sandblasting (uneven collision, inconsistent recess formation) while maintaining the beneficial adhesion enhancement, thereby resolving the contradiction between improving adhesion strength and maintaining flatness
Solution Approach 2:
The patent changes the formation parameters of recesses by using laser processing instead of sandblasting. The laser process allows precise control over recess depth, diameter, and distribution, ensuring uniform recess formation that maintains core plate flatness while still providing sufficient adhesion strength for friction members
2Strength
If many recesses are formed by sandblasting to improve adhesion, then adhesion strength is enhanced, but uniformity of recess formation is degraded
Solution Approach 1:
The patent replaces the mechanical sandblasting process with a laser-based process to form recesses on the core plate. This substitution eliminates the harmful effects of sandblasting (uneven collision, inconsistent recess formation) while maintaining the beneficial adhesion enhancement, thereby resolving the contradiction between improving adhesion strength and maintaining flatness
Solution Approach 2:
The patent changes the formation parameters of recesses by using laser processing instead of sandblasting. The laser process allows precise control over recess depth, diameter, and distribution, ensuring uniform recess formation that maintains core plate flatness while still providing sufficient adhesion strength for friction members
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 the flatness of the joint surface to less than 0.2 mm, improving the adhesion strength of friction members and reducing degradation, resulting in enhanced transmission and blocking of rotary drive force in multiplate clutch devices.
Implementation Method 1
The fine recessed portions are formed by irradiating a metal base body with laser light
Data Source
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AI summary
Provided are a joint component formed with fine recessed portions so that degradation of the flatness of a metal base body, such as a core, to which a joint object such as a friction member is joined can be reduced, a multiplate clutch device including the joint component, and a joint component manufacturing method. At a friction plate (200) as the joint component, many fine recessed portions (204) are formed at a joint surface (203) as a portion of a core (201) joined to friction members (207). The joint surface (203) is formed in a circular ring shape along a peripheral direction of the core (201), and is formed with a flatness of equal to or less than 0.15 mm. The fine recessed portions (204) are formed at the joint surface (203) such that adjacent ones of the fine recessed portions (204) do not overlap with each other and a formation density per unit area (Ua) at the joint surface (203) is uniform. The fine recessed portions (204) are formed as laser processing marks formed at the core (201) by irradiation with laser light L.