Retaining-Ring Pilot Assembly for Tight-Space Die Installation
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Solution Overview
Problem
Current metal forming dies are labor-intensive and costly to design, manufacture, and modify due to the need for custom, handcrafted components and precise machining, especially in tight spaces where additional components are limited.
Innovation Solution
A pilot assembly with a pilot body and ejector pin body featuring a tapered design and retaining ring groove, combined with a spring member, allows for efficient engagement and disengagement of stock pieces within the die set, reducing the need for extensive customization and machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional custom-designed and handcrafted die components are used, then manufacturing precision and reliability are improved, but device complexity and manufacturing cost increase substantially
Solution Approach 1:
The pilot assembly is designed as a universal component that can be used across multiple die sets and applications. The standardized pilot body with specific diameter ratios (first diameter smaller than second diameter) and the ejector pin assembly can be interchangeably installed in different die sets, eliminating the need for custom-designed pilots for each application while maintaining precision locating and ejector functions.
2Manufacturing precision
If traditional custom-designed and handcrafted die components are used, then manufacturing precision and reliability are improved, but manufacturing time and lead time increase substantially
Solution Approach 1:
The pilot assembly is pre-assembled with the ejector pin, spring member, and retaining ring before installation in the die set. This preliminary assembly of standardized components eliminates the need for time-consuming custom fabrication and on-site assembly, allowing rapid installation and significantly reducing lead time while maintaining precision through the pre-configured tapered locating surface and ejector mechanism.
3Manufacturing precision
If traditional large pilot assemblies are used, then locating accuracy is improved, but space availability in tight die sets deteriorates
Solution Approach 1:
The ejector pin is nested within the pilot body, with the spring member and retaining ring compactly arranged around the ejector pin. This nested configuration allows the entire ejector mechanism to be contained within the pilot assembly's cylindrical volume, maintaining accurate locating function while minimizing the space required in tight die set configurations.
4Reliability
If traditional complex pilot assemblies are used, then locating and ejector functions are improved, but ease of manufacture and installation deteriorates
Solution Approach 1:
The pilot assembly is segmented into standardized components: a pilot body with specific diameter ratios, an ejector pin with defined shoulders, a spring member, and a retaining ring. Each component is manufactured independently using standard machining processes, then assembled together. This segmentation simplifies manufacturing of individual parts and facilitates easy assembly and replacement while ensuring reliable locating and ejector functions.
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 enhances the efficiency and cost-effectiveness of metal forming processes by simplifying the assembly and installation of metal forming dies, particularly in tight spaces, while maintaining precision and accuracy.
Implementation Method 1
The pilot assembly includes a spring member surrounding at least a portion of the first end portion of the ejector pin body. The spring member has a first end portion oriented away from the stock piece and a second end portion oriented toward the stock piece.
Data Source
AI summary
A tight space pilot, tight space pilot assembly, and related method includes a tight space pilot that can be installed into a die without fasteners, fastener apertures, or added blocks for mounting. The tight space pilot assembly includes ejectors that are retained by the pilot and a retaining ring that holds the tight space pilot in place in a die member.