Modular Spring Retainer for Metal Forming Dies
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Solution Overview
Problem
Current metal forming dies are labor-intensive and costly to design, manufacture, and repair due to the need for custom, precision machining of individual components and complex assembly processes.
Innovation Solution
A modular spring retainer system that allows for the detachable mounting of a spring member between die plates, utilizing a base with a threaded central aperture and a locking dowel to adjust and secure the spring member's position, reducing the need for precise machining and enabling easy adjustment and maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If custom precision machining is used for individual die components, then manufacturing precision and reliability are improved, but manufacturing cost and labor intensity increase significantly
Solution Approach 1:
The patent applies universality by creating a standardized spring retainer assembly that can be used across multiple die configurations. The retainer assembly includes a base, spring, and retainer components that form a universal mounting system, eliminating the need for custom-machined spring mounts for each die. This standardized assembly can be repeatedly installed using simple fastening operations rather than requiring precision machining of individual mounting locations.
Solution Approach 2:
The patent segments the spring mounting function into a separate, pre-assembled unit (the spring retainer assembly) that can be manufactured independently and then installed as a complete module. This segmentation allows the complex spring mounting requirements to be handled in a standardized manufacturing process rather than requiring precision machining at the die assembly stage, reducing labor intensity while maintaining precision.
2Reliability
If custom precision machining is used for individual die components, then reliability of the die assembly is improved, but manufacturing cost increases
Solution Approach 1:
The standardized spring retainer assembly provides reliable spring mounting through a proven, repeatable design that can be used across multiple dies. The assembly includes precision-machined components manufactured to consistent tolerances in a controlled environment, ensuring reliability while avoiding the need for expensive custom machining at each die production instance.
Solution Approach 2:
The spring retainer assembly is pre-assembled and pre-positioned as a complete unit before installation in the die. This preliminary assembly ensures proper alignment and positioning are achieved during manufacturing of the retainer itself, rather than requiring precision machining operations during die assembly. The pre-assembled unit can be reliably installed using simple fastening operations.
3Manufacturing precision
If complex assembly processes are used for custom die components, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
The spring mounting function is segmented into a pre-assembled retainer unit that consolidates multiple precision requirements into a single manufacturing process. This allows the complex precision work to be done once during retainer production, rather than requiring multiple precision operations during die assembly, thereby increasing productivity while maintaining precision.
Solution Approach 2:
The spring retainer assembly is pre-assembled with all positioning and mounting features established in advance. This preliminary action ensures precision is achieved during the retainer manufacturing process rather than during die assembly, allowing the die assembly process itself to proceed more quickly without sacrificing precision requirements.
4Adaptability or versatility
If individual custom components are used in die sets, then adaptability to specific parts is improved, but ease of repair and modification decreases
Solution Approach 1:
The standardized spring retainer assembly provides a universal solution that can be used across different die applications. If repair or modification is needed, the entire standardized assembly can be replaced as a unit rather than requiring complex disassembly and custom machining operations. This maintains adaptability while significantly simplifying repair processes.
Solution Approach 2:
The modular spring retainer assembly is designed to be replaced as a complete unit when wear or damage occurs. Rather than attempting to repair individual custom-machined components, the entire standardized assembly can be quickly removed and replaced with a new or refurbished unit, reducing repair complexity and downtime while maintaining the adaptability needed for different die applications.
Data Source
AI summary
A modular spring retainer and method for metal forming dies includes a base shaped for detachable connection with an associated die plate, having a threaded central aperture, and an adjacent lock dowel aperture which extends through the threaded central aperture to form a window. A cylindrically-shaped spring retainer is configured to receive a spring therein, and has a threaded exterior portion which engages the threaded central aperture of the base, such that mutual rotation of the same adjusts the longitudinal position of the spring. A locking dowel is closely received in the lock dowel aperture in the base, and has an unthreaded exterior surface which protrudes through the window and abuttingly engages an adjacent portion of the threaded exterior surface of the spring retainer to securely, yet detachably, retain the spring member in a selected longitudinal position.