Load Beam Dimple Positioning via Laser-Plastic Working
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Solution Overview
Problem
Existing head suspension designs face challenges in precisely positioning a slider with respect to a dimple due to the invisible positional relationship between the slider and dimple, leading to difficulties in controlling the slider's attitude effectively.
Innovation Solution
A method involving laser irradiation to form a modified part on a flat plate work, followed by three-dimensional plastic working to create a dimple with a concave curved surface of low surface roughness and uniform smoothness, allowing for precise positioning of the slider using image-based positional data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the dimple is arranged on the back side of the tongue, then the slider can be supported with the dimple, but the positional relationship between the slider and dimple becomes invisible and difficult to position precisely
Solution Approach 1:
The patent introduces an intermediary element (the tongue structure with the dimple) that mediates between the slider and the load beam. The tongue serves as a visible intermediary component that allows precise positioning of the slider on the dimple while maintaining the functional relationship between the slider and the load beam structure.
Solution Approach 2:
The patent positions the dimple on the back side of the tongue, utilizing the third dimension (depth/thickness of the tongue) to resolve the positioning visibility issue. This spatial arrangement allows the dimple to be accessible for precise slider positioning while maintaining the overall structural integrity of the head suspension.
2Measurement precision
If a complicated structure is used to make the dimple visible and positionable, then the slider can be precisely positioned, but the device complexity increases
Solution Approach 1:
The patent extracts the positioning function from a complex multi-component system and concentrates it into the simple tongue-dimple structure. By isolating the critical positioning interface (tongue with dimple) from the rest of the head suspension, the design achieves precise positioning without requiring complicated additional mechanisms.
Solution Approach 2:
The tongue structure with the dimple serves its own positioning function inherently. The dimple on the back side of the tongue automatically provides the necessary positioning reference for the slider without requiring external assistance or complex adjustment mechanisms, making the system self-sufficient for precise positioning.
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 precise positioning of the slider on the dimple without a complex structure, improving the surface finishing accuracy and attitude control of the slider.
Implementation Method 1
irradiating a part of the work where a dimple is formed with a laser beam to form a modified part at the irradiated part
Implementation Method 2
The modified part is formed by melting and softening the part of the work with the laser beam
Implementation Method 3
carrying out plastic working on the modified part to form the dimple having a concave curved surface
Implementation Method 4
the plastic working includes forging and pressing the melted and softened part
Data Source
AI summary
A method of manufacturing a load beam precisely positions a slider on a dimple of a load beam according to precisely obtained positional data of the dimple, the method includes preparing a work which is a flat plate and serves as the load beam, irradiating at least a part of the work where the dimple is formed with a laser beam, to form a modified part at the irradiated part, carrying out plastic working on the modified part, to form the dimple having a concave curved surface at the modified part, taking an image of the concave curved surface of the dimple, obtaining the positional data of the dimple from the image, and positioning the slider on the dimple according to the positional data.