Methods for Press Brake Maintenance and Repair

[Methods for Press Brake Maintenance and Repair]

Press brakes are divided into manual press brakes, hydraulic press brakes, and CNc Press Brakes. Hydraulic press brakes can be further categorized by synchronization method into: torsion shaft synchronization, mechanical-hydraulic synchronization, and electro-hydraulic synchronization. By movement method, they can be divided into: upward-moving type and downward-moving type.

Before performing maintenance or cleaning the press brake, the upper die should be aligned with the lower die and the machine lowered until work is completed. If starting the machine or performing other operations is necessary, the mode should be selected to manual, ensuring safety. The maintenance content is as follows:

1.Hydraulic Oil Circuit

a.Check the oil level in the tank weekly; also check after any hydraulic system repair. If the oil level is below the oil window, add hydraulic oil.
b. The hydraulic oil used for this machine is ISO HM46 or Mobil DTE25.
c. For a new machine, change the oil after the first 2000 hours of operation. Thereafter, change the oil every 4000 ~ 6000 hours of operation. Each time the oil is changed, clean the oil tank.
d. The system oil temperature should be between 35°C ~ 60°C and must not exceed 70°C. Excessively high temperatures will cause deterioration and damage to the oil quality and components.

2.Filters

a.The filter should be replaced or thoroughly cleaned each time the oil is changed.
b. If there is a relevant machine alarm, unclean oil, or other filter abnormalities, replace the filter.
c. The air filter on the oil tank should be checked and cleaned every 3 months, and replaced yearly.

3.Hydraulic Components

a.Clean hydraulic components (base plate, valves, motor, pump, oil pipes, etc.) monthly to prevent dirt from entering the system. Do not use cleaning agents.
b. One month after using a new machine, check for deformation at the bends of all oil pipes. Replace if any abnormalities are found. After two months of use, tighten all connection points of the components. Perform this work with the machine powered off and the system depressurized.

[Popularization of Safety Knowledge about Press Brakes]

1. Strictly abide by the safety operating procedures for machine tool operators and wear the required labor protection equipment properly.
2. Before starting, carefully check that the motor, switches, wiring, and grounding are normal and secure. Check that all operating parts and buttons of the equipment are in the correct position.
3. Check the coincidence and firmness of the upper and lower dies; check whether each positioning device meets the processing requirements.
4. When the upper slide plate and all positioning axes are not in the home position, run the return-to-origin program.
5. After starting the equipment, let it run idle for 1-2 minutes, and move the upper slide plate through its full stroke 2-3 times. If any abnormal noise or malfunction is detected, stop immediately, eliminate the fault, and only proceed with work once everything is normal.
6. During operation, one person should give unified commands, ensuring close coordination between the operator and the feeding/pressing personnel. Ensure all personnel involved are in safe positions before issuing the bending signal.
7. When bending sheet metal, it must be pressed firmly to prevent the sheet from lifting and causing injury during bending.
8. When adjusting the sheet metal pressing die, the power must be cut off, and adjustments made after the machine has stopped running.
9. When changing the opening of the variable lower die, no material is allowed to be in contact with the lower die.
10. Do not allow anyone to stand at the rear of the machine during operation.
11. It is strictly forbidden to bend sheet metal on only one end.
12. If the workpiece or die is found to be misaligned during operation, stop the machine to correct it. Never correct by hand during operation to prevent hand injury.

13. Do not bend over-thick iron plates, quenched steel plates, alloy steel, square steel, or any sheet material that exceeds the performance capacity of the press brake to avoid damaging the machine.
14. Regularly check the coincidence of the upper and lower dies; check whether the pressure gauge indication complies with regulations.
15. In case of any abnormality, stop the machine immediately, check the cause, and eliminate it promptly.
16. Before shutting down, place wooden blocks on the lower die under both sides of the oil cylinders and lower the upper slide plate onto the blocks.
17. Exit the control system program first, then cut off the power.

The above introductions regarding "Methods for Press Brake Maintenance and Repair" and "Popularization of Safety Knowledge about Press Brakes" are hoped to be helpful in letting you understand the "Daily Maintenance Methods and Related Knowledge Introduction for Press Brakes".