Compliant Stamping Tool With Deformable Membrane For Uniform Pressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current stamp forming technologies using matched metal die sets face challenges in scaling to larger part sizes due to nonuniform pressure distribution, leading to material consolidation issues and void formation, which are exacerbated by the rapid deterioration of elastomeric inserts in demanding thermal and mechanical environments.
Innovation Solution
A compliant stamping tool system comprising a support structure, a fluid, and a deformable membrane that opposes non-compliant stamping surfaces, allowing for uniform pressure distribution and reducing the need for excessive pressure, with the deformable membrane being replaceable and capable of conforming to various geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If matched metal die sets are used for stamp forming, then structural strength and durability are improved, but pressure distribution uniformity deteriorates leading to material consolidation issues and void formation
Solution Approach 1:
The patent applies a flexible membrane (thin film) as the stamping surface that can deform to conform to the workpiece geometry and distribute pressure uniformly. This flexible membrane replaces the rigid metal die surface, allowing it to adapt to variations in material thickness and surface geometry, thereby achieving uniform pressure distribution while maintaining sufficient structural strength through the supporting frame.
2Reliability
If stamping pressure is increased to overcome material consolidation issues, then material consolidation is improved, but part thinning increases
Solution Approach 1:
The flexible membrane distributes the stamping force uniformly across the workpiece surface, eliminating pressure concentrations that would cause localized excessive compression and part thinning. This allows achieving adequate material consolidation with lower overall pressure by improving pressure distribution efficiency.
3Manufacturing precision
If elastomeric inserts are used to achieve uniform surface pressures, then pressure distribution uniformity is improved, but tool life deteriorates due to rapid deterioration in thermal and mechanical environments
Solution Approach 1:
The patent uses a flexible membrane made from high-temperature resistant materials that can withstand the thermal and mechanical environment of stamp forming. This membrane maintains its structural integrity and compliance properties over extended periods, significantly improving tool life compared to conventional elastomeric inserts while preserving uniform pressure distribution capability.
Solution Approach 2:
The flexible membrane is constructed from composite materials that combine flexibility with high-temperature resistance and mechanical durability. This composite structure allows the membrane to maintain its conformability and pressure distribution properties while withstanding the demanding thermal and mechanical conditions of the stamp forming process, thereby extending tool life.
4Manufacturing precision
If compliant stamping tools are used to improve part quality and producibility of large-scale parts, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent employs a flexible membrane mounted on a supporting frame, creating a compliant stamping tool that can improve part quality through uniform pressure distribution. The membrane's ability to conform to the workpiece surface ensures good manufacturability for large-scale parts, while the modular design with replaceable membranes helps manage the inherent complexity of compliant tooling.
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 compliant stamping tool system achieves improved material consolidation and reduced part thinning, extending tool life and reducing replacement costs, while maintaining uniform pressure distribution for larger-scale parts.
Implementation Method 1
a deformable membrane secured to a support wall, covering the opening and sealing the fluid within the chamber, the deformable membrane defining a compliant stamping surface
Implementation Method 2
The support wall defines a chamber with an opening. The fluid is disposed within the chamber
Data Source
AI summary
A compliant stamping tool for stamp forming a workpiece includes a support structure, a fluid and a deformable membrane. The support structure includes a support wall spaced from a stamping axis. The support wall defines a chamber with an opening. The fluid is disposed within the chamber. The deformable membrane is secured to the support wall, covers the opening and seals the fluid within the chamber. The deformable membrane defines a compliant stamping surface configured to oppose different non-compliant stamping surfaces of opposing stamping tools. A system for stamp forming a workpiece includes a first stamping tool and the compliant stamping tool. The first stamping tool defines a first non-compliant stamping surface extending from the stamping axis. A method for stamp forming a workpiece is also provided.