Hot Metal Sheet Bulging Forming with Segmented Gas Inflation
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Solution Overview
Problem
Existing hot metal sheet forming technologies fail to ensure precise and quick deformation under reasonable temperature and pressure conditions, particularly for complex and thin-walled metal sheet parts, due to non-uniform temperature and pressure distributions.
Innovation Solution
A method involving placing a metal sheet blank on a forming mold, sealing it, introducing equal high-pressure gases into both sides, heating to a preset temperature, and quickly releasing the gas to achieve bulging, allowing for controlled deformation and uniform pressure distribution, which can be further adjusted through vent hole positioning and heating methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-pressure gas is introduced quickly to achieve quick forming, then productivity is improved, but temperature distribution becomes non-uniform causing poor manufacturing precision
Solution Approach 1:
The single gas introduction system is segmented into multiple gas introduction holes distributed across the mold surface. This allows gas to be introduced at multiple locations simultaneously, maintaining uniform pressure distribution and temperature uniformity while achieving quick forming through high gas flow rates
Solution Approach 2:
The patent applies different gas introduction characteristics to different regions of the mold by positioning multiple gas introduction holes at specific locations. Each hole can be optimized for local requirements, ensuring uniform temperature and pressure distribution across the entire blank surface during quick forming
2Productivity
If gas pressure is increased to achieve quick deformation, then productivity is improved, but pressure distribution becomes non-uniform causing poor manufacturing precision
Solution Approach 1:
The gas pressure application system is segmented into multiple independent gas introduction holes. By distributing the gas introduction points across the mold, the system maintains uniform pressure distribution on the blank surface while enabling high overall gas flow rates for quick deformation
Solution Approach 2:
Multiple gas introduction holes are positioned at specific locations to provide locally optimized pressure distribution. This ensures uniform pressure across the entire blank surface during quick forming, preventing localized deformation issues while achieving high productivity
3Manufacturing precision
If forming time is extended to achieve uniform temperature and pressure distribution, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
By segmenting the gas introduction into multiple holes, the system achieves uniform temperature and pressure distribution instantaneously across the entire blank surface. This eliminates the need for extended forming time while maintaining high deformation uniformity, thus preserving productivity
Solution Approach 2:
The distributed gas introduction holes provide locally optimized conditions that collectively achieve uniform overall distribution immediately. This allows precise control of temperature and pressure at each location simultaneously, achieving both high precision and short cycle time
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 method enables precise, quick, and efficient deformation of complex metal sheet parts with improved strain rates and accuracy, reducing the risk of temperature and pressure-related deformations, and enhancing forming efficiency by maintaining stable temperature and pressure conditions.
Implementation Method 1
introducing high-pressure gas into an enclosed space formed by a sheet blank and a mold cavity through locally-positioned inflation holes
Implementation Method 2
heating the metal sheet blank to a preset forming temperature condition
Data Source
AI summary
A method for quick forming of a metal sheet. In an embodiment, the method includes the following steps: placing a metal sheet blank to be formed on a forming mold; introducing high-pressure gases with equal pressures simultaneously into upper and lower enclosed cavities respectively formed by the metal sheet blank and the sealing mold, and the metal sheet blank and the forming mold; heating the metal sheet blank to a preset forming temperature condition; quickly releasing the high-pressure gas from the cavity formed by the metal sheet blank and the forming mold, such that the metal sheet blank bulges; and discharging the gas from the cavity formed by the metal sheet blank and the sealing mold, and opening the mold to obtain a formed metal sheet part.