The vibration solidification technology of lost foam casting is a physical modification technology to refine the grain size and improve the performance of castings by applying vibration during metal solidification. According to the application mode of vibration, the vibration solidification technology of lost foam casting can be divided into mechanical vibration, ultrasonic vibration and electromagnetic vibration. Among them, mechanical vibration and ultrasonic vibration are the two most widely used vibration modes in the research and application of metal vibration solidification. Mechanical vibration is a kind of low-frequency vibration, which has been used earlier in the process of metal solidification. Its frequency ranges from a few hertz to hundreds of Hertz; The frequency of ultrasonic vibration is higher, and the number of vibration times in one second can reach more than 20000.
The vibration solidification process can be divided into vertical vibration, horizontal vibration and compound vibration according to the direction of vibration application. According to the vibration introduction position, it can be divided into: upper introduction, bottom introduction and side introduction; According to the continuity of vibration, it can be divided into continuous vibration and discontinuous vibration (periodic vibration and random vibration).
According to the action mode of vibration in liquid metal, it can be divided into indirect action on liquid metal and direct action on liquid metal. Indirect action on liquid metal is a direct action of vibration on the mold, through which the vibration energy is transferred to the metal flame to promote the movement of metal melt, such as mechanical vibration; Direct action on liquid metal is a kind of direct action of vibration on the metal body to promote the movement of the solution through the interaction between the vibration source and the metal solution, such as ultrasonic vibration. Compared with other vibration solidification methods in lost foam casting, applying mechanical vibration during metal solidification is a method with low cost and easy to be popularized in industrial production. It is an early application of vibration solidification method in lost foam casting.