Die Button Key Assembly With Compact Retainer Ring Fastening
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Solution Overview
Problem
Current die button keys in metal stamping dies have a large footprint due to their length, requiring valuable tool space and are challenging to machine, with multiple steps needed for removal, and often have smaller fasteners and threads due to space constraints.
Innovation Solution
A die button assembly with a key body and fastener design featuring grooves and a retainer ring that allows for compact attachment and easy removal, utilizing a tapered fastener opening and grooves for secure retention, reducing the need for long keys and simplifying machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard fastener and jack screw are used to secure the key, then the key can be securely retained and removed, but the key length increases and valuable tool space is consumed
Solution Approach 1:
The retainer ring is nested within the key body, with its grooves receiving the fastener shaft. This nesting allows the fastening mechanism to be compact and integrated within the key structure, eliminating the need for a long external jack screw while maintaining secure retention capability
Solution Approach 2:
The retention mechanism transitions from a linear extension (long key with external jack screw) to a radial/dimensional integration (retainer ring with grooves receiving fastener shaft within the key body). This dimensional change allows secure fastening without increasing key length
2Reliability
If the key is made long to accommodate fastener holes and tapped holes, then standard fasteners can be used for secure attachment, but machining becomes more challenging and time-consuming
Solution Approach 1:
The attachment mechanism is segmented into distinct functional elements: the retainer ring with grooves, the fastener with shaft and head, and the key body with recess. This segmentation allows each component to be manufactured independently with simpler geometry, reducing overall machining complexity while maintaining secure attachment
Solution Approach 2:
Instead of extending the key outward to accommodate fasteners (traditional approach), the design inverts the approach by integrating the fastener reception feature within the key body through the retainer ring grooves. This inversion simplifies machining by eliminating the need for long key geometry while maintaining attachment security
3Reliability
If multiple steps are used to remove the key, then secure retention is achieved, but the removal process becomes time-consuming and complex
Solution Approach 1:
The retainer ring grooves are designed to automatically engage with the fastener shaft when the fastener is inserted, and to automatically release when the fastener is removed. This self-service mechanism eliminates the need for multiple manual steps or special removal tools, simplifying the operation while maintaining secure retention during use
Data Source
AI summary
A die button assembly includes a die button body and a key body that retains the die button body in a die member. The key body includes a fastener that is coupled to the key body by an expanded C-ring that is received in grooves on the key body and the fastener. The key body contracts a shoulder on the die button body to hold the die button when the fastener is secured in a die member.