Product Overview:
The electro-hydraulic servo press adopts an electro-hydraulic servo hybrid pump control system to achieve closed-loop control of load position, speed, and pressure by controlling the servo motor to drive the hydraulic bidirectional pump. It greatly utilizes the advantages of servo control and hydraulic control, and solves the problem of a good method between electronic servo press and digital hydraulic press.

Technical features:
Replacing valve control technology with pump control technology eliminates throttling losses, eliminates overflow losses, and achieves significant energy savings (up to 60%);
The fuel tank capacity has decreased by 75%, reducing the amount of hydraulic oil used;
Low thermal equilibrium temperature, no need for cooling device, extended service life of hydraulic components;
The servo motor can be significantly overloaded in a short period of time, and the actual installed power is only 50% of the theoretical installed power.
The high-performance dedicated controller used combines various advanced control strategies such as pressure closed-loop, position closed-loop, position pressure composite control, and synchronous control to achieve composite control of position, pressure, and flow. The system has a repeated positioning accuracy of ± 0.005mm and a synchronous accuracy within ± 0.020mm.

1: Control system:

The CNC system of this equipment is developed using configuration software, with a high color configuration touch screen as the carrier, and a human-machine dialogue window is established, which greatly facilitates users to intuitively input and call production parameters, as well as directly monitor on-site production process data, including equipment status; The control system of this device adopts products from the internationally renowned Japanese brand Mitsubishi Corporation. Can effectively ensure the reliability and stability of equipment operation and the universality of equipment;

2: Equipment operation principle:

The equipment drives the oil cylinder to perform up and down pressing operations through a CNC hydraulic system. The human-machine interface operation window is docked, and the pressing parameters of the product can be set on the configuration touch screen according to the customer's pressing product. The pressing data of the product can be intuitively viewed, and the online pressing detection function can be carried out for the pressing product. The equipment has fast pressing, pressing, holding and returning multi-stage pressing speed control, which effectively ensures the pressure accuracy and displacement accuracy of the product during the pressing process;

3: Working conditions of equipment

1. Working environment: ambient temperature -10~45 ℃, relative humidity 40~80%

2. Power supply voltage: AC380V (± 10%), frequency 50HZ (± 1HZ), three-phase five wire

3. The maximum working pressure of the liquid is 17MPA, and the continuous working oil temperature does not exceed the set 65 ℃ at room temperature of 35 ℃

4. Use high-quality hydraulic oil No. 46

4: The working efficiency of the equipment

1. Theoretical fast sliding speed of 160MM/S

2. The theoretical working speed of the slider is adjustable from 5-20MM/S (the minimum adjustable range for each downward pressing speed is 1mm)

3. Theoretical ascent speed of slider: 130MM/S

Equipment functionality;

(a) Touch screen function

1. Operating interface; Display the current pressing force, real-time displacement, daily output, display the current working status of the equipment, and display the current

Various parameter settings, as well as various fault alarms.

2. Parameter setting; Pressure holding time, upper and lower limit positions of the slider, working position, maximum output of the equipment, grating status, equipment operating speed

Degree, pressure testing settings, idle shutdown time, and other settings.

3. The touch screen has Ethernet interface, USB interface, RS485 communication interface, data storage and output functions, etc.

4. Self/manual conversion button (equipped with power indicator, power switch, device reset, and three color indicator lights on the touch screen installation box testing end),

Alarm buzzer and other buttons.

5. Capable of storing customized control processes for different products; Can display the output displacement compression curve. Can store product press fit

Force displacement detection data generated during the process; And can directly export data in EXCEL format; Can connect to a printer to directly print touch

Touch screen image data.

(b) Electrical control function of equipment

1. Pressure and displacement control mode: Use displacement sensors to set the upper limit position, working position, and detection point position of the oil cylinder,

Set the return force and other monitoring force values of the oil cylinder using a force sensor. When using a displacement sensor or a force sensor

When damaged, the device will sound an alarm.

2. The device has an automatic motor shutdown function: that is, if the device does not perform any operation within a certain period of time, the motor will automatically stop

Stop working;

3. The device software system provides two passwords, one is the parameter setting password, which is used for product control and production parameter storage and retrieval; One is the pressure correction password, which is used for correcting pressure data;

4. When the displacement sensor and force sensor are damaged, the system will provide a text prompt, which can facilitate users to quickly repair and solve the problem.

5. During jog operation, the parameter setting interface can display the current displacement of the master cylinder in real time, facilitating parameter setting.

(c) Principle of equipment pressing and detection

1: The bottom dead center adopts a dead stop block and sets the "position detection force mode"

Enter parameters and change password on the touch screen, set the safe positions of the upper and lower limits of the slider, the working position of the slider, and the upward movement of the slider

After setting the pressure, positions of 5 detection points, upper and lower limit force values of 5 detection points, and other corresponding I/O point switches to OK,

After being programmed into the mold (letters and numbers, excluding text), press save to complete the parameter settings for the mold. For future operations, simply input

By entering the mold number, the required working parameters of the current press can be retrieved, and theoretically, 100 sets of programs can be stored;

The operator places the product into the fixture, presses the start button, and the slider quickly descends. After reaching the working position, the slider slows down

As the product gradually presses in, the device compares the current force value with the set five point upper and lower limit force values (such as the current 100MM)

The position force value is 60KN, and the upper limit of the force value set at this point is 50KN, indicating that the fit is too tight at this position, and the system considers it as interference fit at this point

The amount is too large. If the lower limit force value set for this point is 70KN, it indicates that the fit is too loose, and the system considers the interference fit at this point to be too small. It is greater or less than

The upper and lower limit force values are considered as non-conforming products, and the slider will stop and issue an alarm; If the current force value is between the upper and lower limit force values, the system will

Regarded as qualified products and allowed to enter the next point for testing. When the slider contacts the dead stop block, the current force value rapidly increases and exceeds the set value

After the rebound force, the equipment stops pressurizing and enters the holding time. When the holding time is up, the slide quickly rebounds and reaches the upper limit stop position

After setting, the slider stops and one cycle of action is completed. (Note that if the positions of the above five points are not detected or cannot be reached, an alarm will be issued. Touch

Screen and provide corresponding prompts)

2: The bottom dead center adopts a dead stop block and sets the "force detection position mode"

Enter parameters and change password on the touch screen, set the safe positions of the upper and lower limits of the slider, the working position of the slider, and the upward movement of the slider

Pressure, 5 detection point force values, and 5 detection point upper and lower limit displacement values, as well as other corresponding I/O point switches, set OK

After that, enter the mold number (letters and numbers, excluding text), press save, the mold parameters are set, and the subsequent operations are completed

Simply enter the mold number to retrieve the required working parameters for the current press, and theoretically store 100 sets of programs.

The operator places the product into the fixture, and after the sensor detects OK, presses the start button. The slider quickly descends to reach the working position

Set the slider to slow down and gradually press the product in. At the same time, the equipment checks the current displacement value and the set five point up and down displacement values

Comparison, if the current force value is 50KN, the current position is 150MM, and the set upper limit displacement value is 145MM, it indicates the use of 50KN

Force can press the product excessively, and the system considers that the interference fit at this point is too small. If the set lower limit position is 160MM, it indicates that 50KN is used

If the force is not enough to reach the position, the system considers that the interference fit at that point is too large. If it is greater than or less than the up and down displacement values, it is considered a non-conforming product

Will stop and sound an alarm; If the current force value is between the upper and lower limits, the system will consider it a qualified product and allow it to enter the next step

Point detection: When the slider contacts the dead stop block, the current force value rapidly increases. When it exceeds the set rebound force, the equipment stops pressurizing and enters

When the holding time is reached, the slider quickly rebounds and reaches the upper limit position. The slider stops and completes one cycle of action.

(Note that if the positions of the above five points are not detected or cannot be reached, an alarm will be issued and the touch screen will provide corresponding prompts)

6: Safety;

1: There is an emergency stop button and safety protection grating installed in front of the machine. In case of a malfunction, the operator can press the emergency button

The machine immediately stops, and if the operator reaches into the machine during operation, the machine will immediately stop running, protecting the personal safety of the operator.

2: The equipment is equipped with an oil temperature detection sensor, which can effectively detect the oil temperature under the current operating state of the equipment and prevent valve and seal damage caused by excessive oil temperature