The servo motor drive of the hydraulic punching press forming machine is to replace the ordinary transmission press motor with a servo motor, that is, a servo hydraulic punching press forming machine, also known as a servo press and a servo press. The motion curve of the slider of the servo hydraulic punching press forming machine can be set according to the stamping process, and the stroke is adjustable.
This type of press is mainly aimed at high-precision forming of difficult-to-form materials and parts with complex shapes. It greatly improves the machining accuracy and stamping efficiency of the press, and at the same time saves the flywheel, clutch and other components, reduces the production cost of the enterprise, and saves energy.
Compared with traditional hydraulic punching press forming machinees, the advantages of servo hydraulic punching press forming machinees are reflected in the following points:
1. High level of versatility, flexibility and intelligence
Due to its servo function, the slider motion curve is no longer just a sine curve, but an arbitrary curve that can be optimally designed according to process requirements.
2. High precision
Since the linear grating ruler is used to detect the position of the slider, the slider has the entire working process of the press; the motion control accuracy is high, especially near the bottom dead center, the slider accuracy can be guaranteed to change within ±0.01mm; thus ensuring the pressure The closed height of the machine in the production process is stable, which inhibits the appearance of product burrs and prevents the generation of defective products.
3. High productivity
The servo hydraulic punching press forming machine retains the advantages of the crank press, especially its productivity is much higher than that of the hydraulic punching press forming machine, which reflects the processing quality of the hydraulic punching press forming machine and the production efficiency of the mechanical press. Not only that, the crank press driven by the servo motor can also adjust the stroke of the slider according to different workpieces.
In one working cycle, there is no need to complete a 360-degree rotation, just swinging a certain angle to complete the stamping work, further shortening the cycle time. It minimizes unnecessary travel and greatly increases productivity.
Servo hydraulic punching press forming machinees are widely used in punching, blanking, bending, hemming, shallow stretching and other processes, widely used in automobiles, aviation, electronic components, instrumentation, electrical appliances, watches, household appliances, daily hardware, molds and other industries.
Simple principle and future development direction of servo hydraulic punching press forming machine?
Primapress company’s special energy-saving hydraulic station for servo hydraulic punching press forming machine adopts “pump-controlled servo” technology, which realizes precise control of flow and pressure by precisely controlling the torque and speed of the pump. It is mainly composed of electro-hydraulic servo driver, three-phase AC permanent magnet synchronous motor, high-performance special servo pump and pressure sensor.
Since the output flow of the oil pump is proportional to the speed of the motor, the pressure in the oil circuit is proportional to the output torque of the motor. Through the double closed-loop control of system pressure and flow, as well as the special PID control algorithm of vector control and field weakening control, the precise control of the pump torque and speed is completed, the flow and pressure are accurately supplied according to actual needs, and the energy loss of high-pressure throttling is eliminated.
It overcomes the problem that the oil temperature rises too fast due to high-pressure throttling in the traditional “valve-controlled servo” system, and achieves the effect of energy saving and electricity saving. At the same time, the oil temperature of the system is reduced, the maximum energy saving rate reaches 70%, and the average energy saving rate reaches 30%.
Although the traditional hydraulic punching press forming machine system adopts the energy-saving solution of constant power variable pump, when the machine tool is in the state of rapid pressure reduction, pressure maintenance, and robot loading and unloading, the three-phase asynchronous motor will still drive the oil pump to work, and the output oil will pass through. If the hydraulic system overflows back to the tank, it will cause a great waste of energy.
At the same time, the circulating overflow is likely to cause the oil temperature to rise. The pump-controlled electro-hydraulic servo technology of the servo press uses the high-speed response of the servo motor to realize real-time oil supply, and can also realize different pressures and flows required by various processes. By detecting the pressure and flow signals of the hydraulic control system in real time, the speed of the servo motor required for action under various working conditions can be adjusted in time, so that the flow and pressure output by the pump can meet the needs of the system to the greatest extent. In the non-working state, the servo motor runs at a low speed.
In general, compared with before the renovation, the energy saving effect can reach 20%-70%, and the noise and oil temperature are also significantly reduced. At the same time, because the servo press adopts servo drive, it is convenient to upgrade the hydraulic punching press forming machine intelligently.
There is no doubt that the servo mechanization of hydraulic punching press forming machinees is the future development direction, and great efficiency can be obtained through the servo energy-saving transformation of hydraulic punching press forming machinees. It is believed that such high cost performance will be recognized by more customers and will definitely promote the reform of the entire industry.