Guided Retainer Assembly for Precise Stamping Die Alignment
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Solution Overview
Problem
Existing stamping dies face challenges in achieving precise alignment of components due to misalignment issues, which can lead to damage of parts and dies under extreme loads, particularly in progressive dies, complicating assembly and increasing costs.
Innovation Solution
The use of guided retainers that movably couple holders to plates in stamping dies, featuring a pin with an enlarged portion and a bushing, allowing for precise motion transfer and alignment without guide pins, using a groove and retainer plate for attachment, and a clamp to fix the bushing in position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional guide pins and bushings are used for alignment, then component alignment is achieved, but assembly complexity and misalignment risks increase under extreme loads
Solution Approach 1:
The patent combines the guide pin and retainer plate into a single integrated guided retainer component. The guide pin is directly attached to the retainer plate, eliminating the need for separate alignment pins and retainers. This merging reduces the number of parts, simplifies assembly, and maintains precise alignment functionality through the integrated structure that guides the pressure pad while retaining it to the holder.
2Reliability
If multiple separate components (guide pins, retainers, bushings) are used, then alignment functionality is provided, but the number of parts and assembly steps increase
Solution Approach 1:
The guided retainer merges the guide pin, retainer plate, and bushing into a single integrated component. The guide pin portion provides alignment guidance, the retainer plate portion retains the pressure pad, and the bushing is incorporated into the structure. This eliminates the need for multiple separate parts while maintaining all necessary alignment and retention functions.
Solution Approach 2:
The guided retainer is designed as a multi-functional component that simultaneously performs guidance, retention, and loading functions. The guide pin portion guides the pressure pad alignment, the retainer plate retains the pressure pad to the holder, and the bushing accommodates movement while maintaining alignment. This universal design reduces part count while ensuring reliable alignment functionality.
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 guided retainers enhance precision and reduce assembly complexity, maintaining component alignment and reducing the risk of damage, thereby improving die performance and lowering costs.
Implementation Method 1
A bushing is received on and is slidable relative to the pin into an abutting relationship with the offset
Implementation Method 2
A bushing is received on and is slidable relative to the pin into an abutting relationship with the offset
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.