The bending machine is divided into manual bending machine, hydraulic bending machine and numerical control bending machine. Hydraulic bending machine can be divided into torsion shaft synchronous bending machine, mechanical hydraulic synchronous bending machine and electro-hydraulic synchronous bending machine according to synchronous mode. According to the movement mode, the hydraulic bending machine can also be divided into: upward moving bending machine and downward moving bending machine.

Before the bending machine is maintained or cleaned, the upper die should be aligned with the lower die, and then put down and shut down until the work is completed. If starting up or other operations are required, the mode should be set to manual and ensure safety. The maintenance contents are as follows:

1. Hydraulic oil circuit

a. Check the oil level of the oil tank every week. If the oil level is lower than the oil window, add hydraulic oil;

b. The hydraulic oil used for this machine is ISO HM46 or MOBIL DTE25;

c. The oil of the new machine should be changed after 2000 hours of operation, after every 4000~6000 hours of operation, the oil tank should be cleaned every time of oil change;

d. The oil temperature of the system shall be between 35 ℃ and 60 ℃, and shall not exceed 70 ℃. If it is too high, the oil quality and accessories will be deteriorated and damaged.

2. Filter

a. The filter shall be replaced or thoroughly cleaned every time the oil is changed;

b. The machine tool has related alarms or other abnormal filters such as dirty oil, which should be replaced;

c. The air filter on the oil tank shall be checked and cleaned every three months, and replaced every year.

3. Hydraulic components

a. Clean hydraulic components (baseplate, valve, motor, pump, oil pipe, etc.) every month to prevent dirt from entering the system, and do not use detergent;

b. After the new machine has been used for one month, check whether there is deformation at the bend of each oil pipe. If there is any abnormality, replace it. After two months of use, fasten the connection of all accessories. Shut down the machine when doing this work, and the system has no pressure.

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