Guided Retainer Assembly for Precise Stamping Die Alignment
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Solution Overview
Problem
The alignment of components in stamping dies is critical for quality and longevity but is challenging due to the need for precise axial and rotational movement, especially in progressive dies, where misalignment can lead to damage from extreme loads.
Innovation Solution
The use of guided retainers with pins and bushings that allow for precise motion transfer between holders and plates, eliminating the need for guide pins and improving alignment through a pin with an enlarged portion and offset, and a clamp to secure the bushing in place, facilitating easier assembly and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional guide pins and bushings are used for alignment, then alignment precision can be achieved, but device complexity and assembly difficulty increase
Solution Approach 1:
The patent combines the guide pin and retainer into a single integrated guided retainer component. The guided retainer includes a pin with an enlarged head portion and a body portion that extends through a bushing, eliminating the need for separate guide pins and retainers. This merging reduces the number of parts while maintaining alignment precision through the integrated structure.
Solution Approach 2:
The guided retainer serves multiple functions simultaneously: it provides alignment guidance through the pin-bushing interface, retains the punch or die in the correct position, and transfers motion between components. This multi-functionality replaces multiple specialized components with a single universal element, reducing complexity while maintaining precision.
2Manufacturing precision
If multiple separate components (guide pins, retainers, bushings) are used, then alignment can be achieved, but assembly time and cost increase
Solution Approach 1:
By merging the guide pin and retainer into one guided retainer component, the assembly process is simplified. Instead of installing separate guide pins and retainers, the integrated guided retainer can be installed as a single unit, reducing assembly steps and time while maintaining the same alignment functionality.
Solution Approach 2:
The guided retainer is segmented into functional portions (enlarged head portion for retention, body portion for guidance through the bushing) that can be manufactured separately and then assembled, or manufactured as a single integrated piece. This segmentation allows for efficient manufacturing and assembly while maintaining precision alignment capabilities.
3Duration of action of stationary object
If precise alignment is maintained throughout the cycle, then component longevity improves, but the structure becomes more complex
Solution Approach 1:
The integrated guided retainer structure maintains precise alignment throughout the stamping cycle by combining the guidance and retention functions in one component. This reduces structural complexity compared to multiple separate parts that would require precise fitting and adjustment, while still ensuring component longevity through consistent alignment.
Solution Approach 2:
The guided retainer's enlarged head portion automatically engages with the bushing to provide self-alignment and guidance during operation. This self-servicing mechanism maintains alignment precision without requiring complex external alignment systems, thereby extending component longevity while keeping the structure relatively simple.
Data Source
AI summary
A guided retainer for movably coupling a holder to a plate of a stamping die for use in a press including a pin having an enlarged portion. A bushing received on and slidable relative to the pin into an abutting relationship with the enlarged portion. When the guided retainer is assembled with the holder and the plate, the guided retainer is capable of transferring motion of the holder to the plate during movement of the press to an opened position for insertion of a workpiece into the stamping die. The pin includes a groove and a retainer plate that is received in the groove. A stamping die configured to be used in a press to modify a workpiece. The stamping die including a holder that is adapted to be coupled to the press. A plate that is spaced apart from the holder and a guided retainer.