Low Pressure Casting Aluminum Alloy Wheels Segmented Solidification
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Solution Overview
Problem
The existing low-pressure casting process for aluminum alloy wheels results in insufficient comprehensive performance, particularly low elongation rate, and inefficient production time for aluminum alloy parts.
Innovation Solution
A casting process that divides the solidification into multiple stages with varying pressure settings, including high and low pressure stages, to enhance the metal density and structural integrity of aluminum alloy parts, specifically for aluminum alloy wheels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional low-pressure casting process is used, then production efficiency is maintained, but the elongation rate and comprehensive performance of aluminum alloy wheels are insufficient
Solution Approach 1:
The solidification process is divided into multiple stages with alternating high and low pressure settings. The patent applies three high-pressure stages (1400-1800 Mbar, 1500-3000 Mbar, 3000-4500 Mbar) and three low-pressure stages (700-1100 Mbar), creating a segmented pressure profile that improves metal density and elongation rate while maintaining production efficiency through systematic process organization
2Strength
If single-stage solidification is used, then production time is reduced, but the metal density and structural integrity are insufficient
Solution Approach 1:
The patent implements periodic pressure variations during solidification, alternating between high-pressure phases (1400-4500 Mbar) and low-pressure phases (700-1100 Mbar). This periodic action occurs in six distinct stages, with each high-pressure stage lasting 3-12 seconds followed by low-pressure stages, creating a rhythmic pressure profile that enhances metal density without excessive production time
3Manufacturing precision
If constant pressure is applied during solidification, then process simplicity is maintained, but the elongation rate remains low
Solution Approach 1:
The patent transitions from static constant pressure to dynamic pressure control, where pressure varies continuously during solidification. The system adjusts pressure between 700-4500 Mbar across six stages, with specific rates of pressure increase (100-250 Mbar/s) and decrease, creating a dynamic pressure profile that optimizes elongation rate while using standardized control mechanisms
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 process effectively improves the elongation rate and strength of aluminum alloy wheels by 16-50% and increases production efficiency by 8-18% by optimizing the solidification sequence and pressure settings.
Implementation Method 1
the aluminum liquid is solidified under pressure during the casting process
Implementation Method 2
increasing the pressure in the mold cavity to 1400-1800 Mbar at a rate of 100-200 Mbar/s
Data Source
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AI summary
The present invention provides a casting process for aluminum alloy parts. The process comprises the steps as follows: raising liquid; filling mold; increasing pressure; solidifying consisted of at least two stages of different pressure settings; and relieving pressure. The casting process for aluminum alloy parts provided by the present invention can effectively improve the comprehensive performance and production efficiency of the aluminum alloy parts by changing the pressure during the solidification process of casting the aluminum alloy parts.