Modular Pilot Assembly with Self-Contained Stripper
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Solution Overview
Problem
Current metal forming dies are labor-intensive and costly to design, manufacture, and modify due to custom-designed components and complex assembly processes, which hinder efficient production and maintenance.
Innovation Solution
A modular pilot assembly with a self-contained stripper that includes a cylindrically shaped body portion, tapered point, spring retainer rod, ejector pin, and mounting screw, allowing for precise location and automatic stripping of the stock strip, reducing the need for loose parts and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If custom-designed and handcrafted components are used in metal forming dies, then the die can be precisely tailored for a particular part, but the design, manufacture, and repair costs increase substantially and lead time extends
Solution Approach 1:
The pilot assembly is divided into modular components (pilot body, stripper, mounting features) that can be manufactured separately and assembled. This segmentation allows each component to be produced using standard machining processes rather than custom handcrafting, reducing manufacturing complexity while maintaining precision through controlled assembly tolerances
Solution Approach 2:
The pilot assembly is designed to perform multiple functions (locating, stripping, and guiding) within a single integrated component structure. This multi-functionality eliminates the need for separate custom-designed components for each function, reducing overall manufacturing complexity and cost while maintaining the precision required for proper die operation
2Reliability
If individually designed and custom mounted components are used, then the die set can be optimized for specific parts, but substantial lead time is required for making, testing and setup
Solution Approach 1:
The pilot assembly is pre-designed and pre-assembled as a complete functional unit with all mounting features and components integrated. This preliminary preparation allows the assembly to be installed as a single module rather than requiring sequential assembly of individual custom components, significantly reducing lead time for die setup while maintaining optimized performance
Solution Approach 2:
Multiple functions (pilot locating, stripper mechanism, mounting interface) are merged into a single integrated pilot assembly. This consolidation eliminates the need for separate custom mounting operations and testing of individual components, reducing overall lead time while ensuring reliable optimized performance through integrated design
3Manufacturing precision
If carefully machined precision holes and recesses are required for mounting components, then accurate component positioning is achieved, but the process becomes labor intensive and requires substantial lead time
Solution Approach 1:
The pilot assembly incorporates self-aligning and self-locating features (such as integrated mounting protrusions and recesses) that automatically position the assembly correctly during installation. This self-service capability eliminates the need for complex pre-machined mounting holes and recesses in the die set, reducing both manufacturing precision requirements and device complexity while maintaining accurate positioning
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
The modular pilot assembly facilitates efficient and cost-effective production by reducing manufacturing complexity, ensuring consistent stripping, and enabling quick installation and maintenance, while maintaining precise location and operation of the stock strip.
Implementation Method 1
a spring member having a generally hollow interior received on and over the spring retainer rod portion of the pilot, an outer end oriented toward the stock strip and received in the spring groove, and an opposite inner end oriented away from the stock strip and positioned adjacent to the retainer groove in the spring retainer rod portion
Data Source
AI summary
A pilot assembly and method has a cylindrical pilot body with a tapered outer end, a grooved inner end, and a central portion with at least one inwardly curved side wall relief, as well as internally mounted reciprocating ejector pins with outer ends that protrude through holes in the outer body end to strip stock from the pilot. A spring has its outer end mounted in the groove in the outer body end, and an inner end attached to the inner body end in a pre-tensed condition. A cap screw has an enlarged head that has at least a portion thereof fit into the pilot sidewall relief, and a threaded shank that anchors the pilot in an associated die member.