Vibrating Punching Stage for Damper Constraint Layer Integrity
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Solution Overview
Problem
Thicker constraint layers in dampers for head suspensions often crack during punching, leading to deviations in damping characteristics and reduced performance due to the existing methods used for attaching dampers to head suspensions.
Innovation Solution
A method and apparatus that utilize a hollow punch and a vibrating punching stage to punch out dampers, where the punching stage is vibrated at high frequency to prevent cracking of the constraint layer, allowing the punched damper to be positioned within the punch and then extruded onto the head suspension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thicker constraint layer is used in the damper material, then the damping performance is improved, but the constraint layer cracks during punching
Solution Approach 1:
The punching stage is vibrated at high frequency during the punching process. This vibration prevents the constraint layer from cracking by reducing the contact time between the punch and the material, allowing thicker constraint layers to be punched successfully while maintaining integrity
Solution Approach 2:
The punching system transitions from a static punching stage to a dynamic one with high-frequency vibration. This dynamic approach allows the system to handle thicker constraint layers that would otherwise crack under static punching conditions
2Ease of manufacture
If conventional punching method is used, then the process is simple, but cracks occur in the constraint layer of thicker dampers
Solution Approach 1:
A vibration mechanism is added to the punching stage to prevent cracking in thicker constraint layers, while maintaining the overall simplicity of the punching process
3Manufacturing precision
If high frequency vibration is applied to the punching stage, then constraint layer cracking is prevented, but device complexity increases
Solution Approach 1:
High frequency vibration is applied to the punching stage to prevent constraint layer cracking during punching, resolving the technical contradiction between manufacturing precision and device complexity
4Measurement precision
If the punched damper is positioned within the hollow punch, then precise placement is achieved, but the punching force may cause cracking
Solution Approach 1:
The hollow punch is used to position the damper precisely within its cavity, while high frequency vibration prevents cracking during the punching process
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
Prevents cracking of the constraint layer during punching, ensuring accurate attachment of dampers to head suspensions without compromising damping properties, thereby improving the reliability and efficiency of the damper attachment process.
Implementation Method 1
punching out the damper from the damper material so that the punched damper is positioned within a hollow inside of the punch while vibrating a member composing the punching stage on which the damper material is set at high frequency
Data Source
AI summary
A method punches out a damper from a damper material set on a punching stage with use of a hollow punch so that the punched damper is positioned within a hollow inside of the punch while vibrating a member composing the punching stage on which the damper material is set at the high frequency. The damper material includes a viscoelastic body layer and the constraint layer laminated on the viscoelastic body layer and the viscoelastic body layer includes an attaching surface through which the damper material is detachably attached on the liner.