Product introduction:

Specializing in the production of large-tonnage presses, the new workshop has reached the standard of 10,000-ton press production line, and meets the requirements of customers using large-tonnage hydraulic presses. Various structural forms. The size of the work surface, the height of the opening, and the stroke can be customized according to the process requirements. The company has designed four-column hydraulic press products with good quality assurance, strong anti-eccentric load capacity, high precision, high efficiency and energy saving, which can save costs and improve economic benefits for customers to a large extent.

Specializing in the production of large-tonnage presses, the new workshop has reached the standard of 10,000-ton press production line, meeting the requirements of customers using large-tonnage hydraulic presses.

2000 tons 3000 tons 4000 tons four-column hydraulic press_4000 tons large tonnage press performance characteristics:

1. Computer optimized frame structure, tempering after vibration aging, good rigidity and high precision

2. Integrated cartridge valve system, less leakage point, small impact, reliable action, beautiful appearance and long service life

3. The new type of oil cylinder sealing element of wear-resistant and pressure-resistant polyurethane (Taiwan) is fast, with strong reliability and long service life.

4. The column guide rail is equipped with a lubricating device

5. Complete safety devices, support circuit in the lower chamber of the oil cylinder, interlocking circuit between the upper and lower chambers of the oil cylinder, double adjustment of the pressure relief valve and the high pressure limit of the electric contact, the upper and lower limit induction switches, the safety is superior

6. The electrical system adopts relay or PLC control, with large electrical capacity and high reliability

7. Two molding processes of constant pressure and fixed stroke can be realized, and it has the function of holding pressure and delay, and the delay time is adjustable. The working pressure and stroke can be adjusted according to the process requirements within the specified range, and the operation is simple.

2000 tons 3000 tons 4000 tons four-column hydraulic press_4000 tons large tonnage press structure description:

1. Body

The fuselage adopts a four-column structure, which consists of an upper beam, a slider, a workbench, a guide column, etc. The slider is equipped with a guide sleeve, and the four guide columns are used as the main frame to make the slider move up and down. The sliding block and the piston rod of the master cylinder are connected by flanges, and there are T-shaped grooves on the sliding block and the worktable for users to install the tool.

The column is made of 45# high-quality carbon steel, the surface is chrome-plated after intermediate frequency quenching, the hardness is above HRC45, the wear resistance is good, and the service life of the machine is prolonged.

2. Master cylinder

The main cylinder block is made of 45# forged steel, and the piston rod is made of 45# high-quality carbon steel. The surface is chrome-plated after intermediate frequency quenching. The hardness is above HRC45, and the wear resistance is good, which prolongs the service life of the machine. The cylinder block of the master cylinder is fixed in the upper beam by means of the shoulder of the cylinder mouth and the large lock nut. The lower end of the piston is connected with the sliding block by connecting flanges, bolts, and the material of the piston head is cast iron, which is used for guiding. The piston head has a YA-type sealing ring in the opposite direction, and an O-type sealing ring is installed on the piston rod. The cylinder is divided into two oil chambers. A guide sleeve is installed on the cylinder, and an O-type sealing ring is installed on the outer circle of the guide sleeve. The flange and bolt are locked to ensure the cylinder port is sealed. A dust ring is installed on the cylinder port flange to ensure the dustproof of the piston rod.

3. Limit device

The stroke limiting device is installed on the left side of the machine and is mainly used to control the stroke distance of the slider. It consists of pad iron, angle iron, induction block, travel switch and so on. The two pad irons are respectively fixed on the worktable and the upper beam to fix the angle iron, and a guide groove is arranged on the angle iron to control the travel of the slider by adjusting the distance of the travel switch. 

4. Hydraulic system

The hydraulic system consists of energy conversion devices (pumps and cylinders), and energy delivery devices (fuel tanks, pipelines). With the help of the control of the electrical system, the slider is driven to complete various action cycles. The hydraulic system adopts a single-pump oil supply system, a large-flow cartridge valve, and an oil suction filter at the oil inlet of the pump to prevent impurities from entering the hydraulic system to ensure the normal operation of the oil circuit. There are oil temperature and oil level display, air filter and other devices in the system. The fuel tank is a steel plate welded structure, with a cleaning window on the side, and a screw plug for oil and sewage drainage at the bottom.

This machine has adjustment and semi-automatic working modes for selection.

The adjustment action is to press the corresponding button to get the jog action of the slider.

5. Electrical system

(1). The machine is equipped with an independent electrical control box, which centrally controls the operation of the entire machine.

(2). The power supply is 380V, 50HZ, and the control power supply is 220V.

2000 ton 3000 ton 4000 ton four-column hydraulic press_4000 ton large tonnage press Optional accessories or functions:

1. Mobile workbench;

2. Punching buffer device;

3. Photoelectric protection device;

4. Digital display and numerical control device for stroke, pressure and speed;

5. Touch industrial display screen;

6. Hydraulic system heating and cooling device;

7. Feeding device;

8. Slider safety bolt;

9. Mold heating and temperature control device;

10. PLC programmable controller. 

When dismantling the 2000-ton 3000-ton 4000-ton four-column hydraulic press_4000-ton large-tonnage press, the staff first carefully wiped off the anti-rust oil. Pay attention to the selection of the center of gravity when hanging, and place the protective pad in the contact position to avoid the use of thin plates for loading when damaging the instrument and components. The hydraulic press should be installed on the concrete foundation, and other waterproof measures and safety lighting devices should be designed according to the actual situation of the user. 

2000 tons 3000 tons 4000 tons four-column hydraulic press_4000 tons large tonnage press installation steps are as follows:

1. Put the hydraulic pad on the workbench, and then put the movable workbench on it. Insert the uprights into the four holes on the slider and the workbench, then install the power mechanism and the electrical cabinet and make a level, and finally fix the anchor screws on the ground. 

2. During this period, hang the master cylinder and the upper beam into the column, block the piston of the master cylinder to prevent the piston from falling off and have an accident when the installation work is completed, tighten the nut, and then take the fastener.

3. According to the outline diagram, hydraulic theory diagram, electrical theory diagram, etc., connect the official road, circuit, stroke limit device, etc., and inject an appropriate amount of oil into the cleaning tank. The recommended oil amount is about 1200L.

4. Unscrew the oil valve of the pump, fill it with oil to eliminate the air in the pump, and loosen the handle of the pressure regulating valve (safety valve). So far, almost all the preparations for machine testing have been completed.

5. When the motor is powered on, its steering should meet the specifications. Otherwise, replace the power connector, start the motor officially, and let the oil level run without load.

6. Turn the switch to the “adjustment” position, press the button SB8, let the main piston move down, the piston head must be correctly inserted into the positioning hole of the slider, and then install the connecting nut between the piston and the slider, leaving 3 -5MM gap connection flange, adjust the pressure valve to increase the pressure in the master cylinder to 5MPa, and use a wrench to fix the connection nut in the pressure holding state.

7. Press the SB9 button to make the slider stroke backward, put the two pressure test plates on the workbench, the center of the plate is below the piston rod; the size of the test plate is F320*650 (MM), the top and bottom should be parallel, and the parallelism error Not less than 0.02/500MM, the plate should bear the pressure of more than 500T, then adjust the parallelism and verticality between the slider and the table, and finally fix the upper beam and tighten the nut.

8. Test under loading conditions, refer to the hydraulic theory diagram, adjust the pressure of the rear valve until the slider does not slide at any position, and pay attention to the pressure not too large. When the pressure of the upper chamber of the master cylinder is less than 1MPa, it will drop the most slowly. The pressure range is controlled between 5MPa-25MPa, that is, it is divided into three times from 80T to 500T.