Vibration-assisted filling capability in thin wall investment casting
| Autor: | Khalid F. Al-Raheem, N. Green, Waleed Abdul-Karem |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Liquid metal
Materials science Investment casting Mechanical Engineering Metallurgy Industrial and Manufacturing Engineering Computer Science Applications Vibration Acceleration Control and Systems Engineering Casting (metalworking) Free surface Surface roughness Head (vessel) Composite material Software |
| Zdroj: | The International Journal of Advanced Manufacturing Technology. 61:873-887 |
| ISSN: | 1433-3015 0268-3768 |
| DOI: | 10.1007/s00170-011-3774-8 |
| Popis: | Understanding the mechanism of the vibration needed to fill thin section and clarifying the dominant control parameters of the vibration in thin wall investment casting are the keys to producing sound casting. The filling capability in thin wall investment casting method can be assessed by the metal head. It was found that the effect of the vibration on the metal head is markedly dependent on acceleration of applied vibration. Two potential mechanisms were observed from the experimental results during the filling process in thin wall casting: discontinuous propagation flow in vibration conditions and continuous propagation flow without vibration. These mechanisms can modify the contact angles between liquid metal and a wall of the mold. Experiments also showed that two features of the transition can be observed from the front of the morphology: coherent liquid metal front, this occurs in thin wall investment casting when the acceleration due to vibration is less than (1 g) and jetting at the free surface, this occurs in thin wall investment casting when the acceleration due to vibration exceeds 1 g. |
| Databáze: | OpenAIRE |
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