High power ultrasonic metal melt treatment system is composed of ultrasonic vibration parts and ultrasonic special driving power supply. The ultrasonic vibration components mainly include high-power ultrasonic transducer, horn and tool head (transmitting head), which are used to generate ultrasonic vibration and transmit the vibration energy to the metal melt. The transducer converts the input electrical energy into mechanical energy, namely ultrasonic wave. In general, the amplitude of the transducer moves back and forth in the form of several micrometers. Such amplitude power density is not enough to be used directly. The horn can amplify the amplitude according to the design requirements, isolate the metal melt and heat transfer, and also fix the whole ultrasonic vibration system. The tool head is connected with the horn, which transmits the ultrasonic energy vibration to the tool head, and then the ultrasonic energy is transmitted to the metal melt by the tool head.
The equipment does not change the customer's existing production equipment and process flow, installation and operation is also very convenient. High energy (high power) ultrasonic metal melt treatment system works in metal ultrasonic treatment, ultrasonic metal processing, ultrasonic grain refinement, ultrasonic metal solidification, ultrasonic melt defoaming, ultrasonic crystallization, ultrasonic cavitation, ultrasonic casting, ultrasonic solidification structure, ultrasonic metal continuous casting and so on.
There are two special difficulties in ultrasonic treatment of molten metal, namely high temperature and corrosion. We all know that the core component of piezoelectric ceramic ultrasonic transducer is piezoelectric ceramic sheet, which has piezoelectric properties after high voltage polarization. If the temperature is higher than 80 ℃, the piezoelectric ceramics will depolarize, and the piezoelectric properties will decline, and this decline is irreversible. Secondly, the temperature of metal melt is generally very high, and the temperature of ferrous metal is even more than 1000 degrees. If the emitter is immersed in the melt and emits high-power ultrasonic wave, it will be affected by both ultrasonic cavitation and molten metal corrosion. This puts forward high requirements for the design and manufacture of ultrasonic melt processor. According to the current situation and requirements of users, we will customize the ultrasonic melt processor to meet the user's requirements.
After the metal is melted, only the emitter is inserted into the molten metal to emit ultrasonic wave to the molten metal. The flange at the front end of the vibration system housing is used for fixing. Because the ultrasonic vibration system has no moving parts and stressed parts, there are no special requirements for fixing. The treated melt is stored in specific containers, such as crucible, melting furnace and crystallizing furnace. The tool head is inserted into the molten metal to emit ultrasonic wave. We can also control the intensity of ultrasonic action by controlling the amount of metal melt, the output power of ultrasonic generator and the time of ultrasonic action. Due to the different characteristics and requirements of various metal materials, the effect and influence of ultrasonic wave are also different. According to the performance requirements of specific metals of users, the balance point between ultrasonic strength and actual effect can only be found through repeated tests, so as to formulate the treatment process.