Hollow Punch Damper Separation Using Projection Part
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Solution Overview
Problem
Existing methods for attaching dampers to head suspensions in hard disk drives face productivity issues due to the need for aligning punched dampers and risk of scattering, and larger dampers are difficult to hold securely due to increased attaching force requirements.
Innovation Solution
A method using a hollow punch to detachably attach damper material on a flexible exfoliative member, positioning a projection part between the member and a supporting surface to accurately punch and hold the damper without punching the member, allowing for precise separation and secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a hollow punch is used to hold punched dampers on its hollow inner surface, then productivity is improved by concatenating punching and attaching operations, but holding reliability deteriorates when dampers increase in size and attaching force exceeds holding force
Solution Approach 1:
A projection part is introduced as an intermediary element between the hollow punch and the damper. The projection part penetrates through the damper material and is held by the hollow punch, thereby mediating the holding force transmission. This allows the punch to securely hold even large dampers with high attaching forces without direct reliance on the hollow inner surface alone.
Solution Approach 2:
The holding mechanism is segmented into two functional parts: the hollow inner surface for general holding and the projection part for enhanced securing. This segmentation allows each component to perform its specific function optimally, with the projection part providing additional anchoring for large dampers while the hollow surface maintains overall structure.
2Ease of manufacture
If dampers are punched out from damper material attached on an exfoliative member, then manufacturing is enabled, but alignment precision deteriorates due to scattering during picking up
Solution Approach 1:
The punching operation and holding operation are merged into a single step using the hollow punch. The punch simultaneously cuts out the damper from the material and captures it on its hollow inner surface, eliminating the separate picking and aligning steps that caused scattering and precision loss.
Solution Approach 2:
The hollow punch performs preliminary holding action immediately after punching, securing the damper on its hollow inner surface before any transfer or alignment operations. This preliminary capture prevents scattering and maintains precision throughout subsequent handling.
Data Source
AI summary
A method punches a damper out from a damper material that is detachably attached on a flexible exfoliative member through an attaching surface of the damper material with use of a hollow punch. The method includes steps of setting the damper material on a supporting surface, positioning a projection part between the exfoliative member and the supporting surface, and punching the damper out from the damper material by cutting the damper material around the projection part by the hollow punch without punching the exfoliative member.