Water jet cutting technology plays an increasingly important role in modern industrial manufacturing because of its high precision, cold cutting characteristics and wide material adaptability. In the whole water jet system, the servo valve, as a key component to control the high-pressure water flow, plays a vital role.
Servo valve is a high-precision proportional control valve, which is mainly used to adjust the flow and pressure of hydraulic or hydraulic system. In the water knife system, it accurately controls the flow and pressure of high-pressure water by receiving the electric signal sent by the control system, thus realizing the accurate control of the cutting process. Its working principle is mainly based on electromagnetic drive and feedback adjustment mechanism, which can realize fast response and high precision control effect.
Firstly, the control of servo valve depends on the instruction input of CNC. After the operator sets the cutting path, speed and pressure parameters through programming, the numerical control system will convert these parameters into electrical signals and send them to the servo valve. According to the change of signal, the servo valve adjusts the position of its internal valve core, thus changing the size of water flow channel and controlling the pressure and flow rate of high-pressure water flow.
Secondly, in order to ensure the stability and consistency of the cutting process, servo valves are usually equipped with feedback systems. The feedback system can monitor the changes of pressure and flow in the valve in real time, compare with the set value, and automatically adjust the position of the valve core to compensate for the deviation. This closed-loop control mechanism greatly improves the accuracy and reliability of water jet cutting.
In addition, the servo valve also has the ability of fast response, which is very important to deal with the unexpected situation that may occur during water jet cutting. For example, when the cutting head encounters the change of material hardness, the servo valve can quickly adjust the pressure to prevent the cutting quality from decreasing or the equipment from being damaged.
The servo valves used in modern water jet system are mostly electro-hydraulic servo valves or directly controlled water medium servo valves. With the development of technology, more and more servo valves integrate digital control and intelligent diagnosis functions, which not only improves the control accuracy, but also facilitates the maintenance and troubleshooting of equipment.
In a word, the servo valve plays the dual roles of “brain” and “heart” in the water jet cutting system. Through high-precision flow and pressure control, it ensures the high efficiency and precision of water jet cutting, and is an important technical basis for realizing the intelligence and automation of modern water jet. In the future, with the continuous improvement of industrial automation level, the application of servo valve in the field of water jet will be more extensive and in-depth.