Head Suspension Base Plate Flange Alignment
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Solution Overview
Problem
Existing head suspension designs fail to correctly align and securely attach the flange of the base plate to the auxiliary member, leading to improper fixation and compromised stability and dynamic characteristics.
Innovation Solution
The head suspension incorporates a base plate with a flange featuring a first-face contact along its outer circumferential edge for attachment to the carriage arm and a second-face contact along its outer circumferential edge for attachment to the auxiliary member, ensuring correct alignment and secure fixation through plastic deformation and laser spot welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the second face of the flange is not provided with a contact face, then the structure is simpler, but the alignment with the auxiliary member is incorrect leading to improper fixation
Solution Approach 1:
The patent applies local quality by providing a contact face (second-face contact) specifically on the second face of the flange that interfaces with the auxiliary member, while other portions of the flange maintain their original structure. This localized modification ensures proper alignment and fixation precision without unnecessarily complicating the overall structure.
2Reliability
If the flange is attached to both the carriage arm and auxiliary member with proper alignment, then the dynamic characteristics are improved, but the manufacturing complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-forming the first-face contact and second-face contact on the flange during the base plate manufacturing process. These pre-formed contact faces ensure proper alignment when the flange is subsequently attached to both the carriage arm and the auxiliary member, thereby improving dynamic characteristics without adding significant manufacturing complexity.
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
This design ensures stable rigidity and dynamic characteristics by correctly aligning and attaching the flange to both the carriage arm and the auxiliary member, preventing improper alignment and contact issues.
Implementation Method 1
the boss fitted into a hole of the carriage arm and fixed thereto by plastic deformation when attaching the base plate to the carriage arm
Implementation Method 2
The second face of the flange of the base plate is usually laid on a reinforcing plate as an auxiliary member and is fixed thereto by laser spot welding
Data Source
AI summary
A head suspension has a base plate including a flange. The flange has a first face attached to the carriage arm and a second face attached to an auxiliary member. A first-face contact is circumferentially formed along an outer circumferential edge of the first face of the flange, so that the first-face contact among parts of the base plate except the boss is most proximal to the carriage arm. A second-face contact is circumferentially formed along an outer circumferential edge of the second face of the flange, so that the second-face contact among parts of the base plate including the boss is most proximal to the auxiliary member. This configuration allows the auxiliary member to be correctly aligned with and attached to the second face of the flange.