Process Development and Optimization
Two die-casting processes were designed for the hinge bracket based on its structure. Using Anycasting software, simulations identified defect locations and causes. After analysis, the more effective process was selected for optimization. Adjustments included modifying the ingates and overflow channels and switching from air cooling to water cooling. Trial molds and simulations confirmed that these changes improved quality.
Advantages of Die Casting in Manufacturing
Modern manufacturing demands lightweight, high-performance, and low-pollution processes. Traditional methods struggle to meet these needs, making die casting a preferred choice. It offers high dimensional accuracy, minimal machining, and strong mechanical properties. Among die-casting materials, aluminum alloy stands out due to its thermoplasticity, low shrinkage, and heat resistance.
Challenges in Process Development
Although die casting provides efficiency, new process development is often slow and costly due to reliance on trial molds and designer experience. The use of CAE simulations helps optimize gating systems, reducing iterations and shortening design cycles.
Structural Analysis of the Hinge Bracket
The hinge bracket is made from YL113 aluminum alloy with dimensions of 116 mm × 82 mm × 43 mm and a weight of 131.64 g. It features a complex shape with a sleeve area, multi-hole plate, and reinforcing ribs. The shrinkage rate is 0.5%, and no additional machining is required.
Die-Casting Process Design
Parting Surface Design
- Scheme 1: Parting surface in the middle, balancing core-pulling elements for easier installation.
- Scheme 2: Parting surface on the top, ensuring dimensional accuracy and easier burr removal.
Gating System Design
- Scheme 1: Ingates placed on the inner wall, reducing filling time.
- Scheme 2: A branch pouring channel minimizes impact on the core and improves metal flow.
Overflow and Runner Design
Overflow channels were positioned to remove slag and prevent defects. Runner placement was adjusted to manage metal flow and filling pressure efficiently.
Simulation Analysis
Filling Process
Simulations showed smooth molten metal flow in both schemes, with minor splashing. However, Scheme 1 had better defect control and lower risk of air entrapment.
Solidification and Defects
Both schemes experienced shrinkage defects in thick wall areas. Scheme 1 had better molten metal replenishment, reducing shrinkage volume to 0.056 cm³ compared to 0.083 cm³ in Scheme 2.
Conclusion
Through simulation and optimization, Scheme 1 proved to be the superior die-casting process for the hinge bracket. The improved gating system, overflow design, and cooling methods enhanced product quality and manufacturing efficiency.
