Circular tube bending machine is a machine capable of bending thin plates. Its structure mainly includes a bracket, a worktable, and a clamping plate. The worktable is placed on the bracket, and the worktable consists of a base and a pressure plate. The base is connected to the clamping plate through a hinge, and the base is composed of a seat shell, a coil, and a cover plate. The coil is placed in a recess of the seat shell, and the top of the recess is covered with a cover plate. When in use, the coil is energized by a wire, which generates an attractive force on the pressure plate, thereby achieving the clamping of the thin plate between the pressure plate and the base. Due to the use of electromagnetic force clamping, the pressure plate can be made into various workpiece requirements, and can also process workpieces with side walls, making the operation very simple.

Structural description of circular tube bending machine:

1. Sliding block part: It adopts hydraulic transmission, and the sliding block part is composed of a sliding block, an oil cylinder, and a mechanical stopper fine adjustment structure. The left and right oil cylinders are fixed on the frame, and the piston (rod) drives the slider to move up and down through hydraulic pressure. The mechanical stopper is controlled and adjusted by the numerical control system;

2. Workbench section: Operated by a button box, the motor drives the material rack to move forward and backward, and the distance of movement is controlled by the CNC system, with a small reading of 0.01 millimeters (both front and rear positions have travel switch limits);

3. Synchronization system: This machine is a mechanical synchronization mechanism composed of torsion shafts, swing arms, joint bearings, etc. It has a simple structure, stable and reliable performance, and high synchronization accuracy. The mechanical stopper is adjusted by a motor and controlled by a numerical control system;

4. Material blocking mechanism: The material blocking is driven by a motor, and the two screw rods are synchronously moved through chain operation. The CNC system controls the size of the material blocking.

Maintenance and upkeep of circular tube bending machine:

Before performing machine maintenance or cleaning, the upper mold should be aligned with the lower mold and the machine should be lowered and turned off until the work is completed. If startup or other operations are required, the mode should be selected as manual and ensured. The maintenance content is as follows:

1. Hydraulic oil circuit

1) Check the oil level in the fuel tank every week, and also check it after hydraulic system maintenance. If the oil level is below the oil window, add hydraulic oil;

2) The hydraulic oil used in this machine is ISO HM46 or MOBIL DTE25;

3) The new machine should have its oil changed after 2000 hours of operation, and every 4000-6000 hours of operation thereafter. After each oil change, the oil tank should be cleaned;

4) The system oil temperature should be between 35 ℃ and 60 ℃, and should not exceed 70 ℃. If it is too high, it may cause deterioration and damage to the oil quality and accessories.

2. Filter

1) The filter should be replaced or thoroughly cleaned every time the oil is changed;

2) If the machine tool has related alarms or other filter abnormalities such as poor oil quality, it should be replaced;

3) The air filter on the fuel tank should be inspected and cleaned every 3 months and replaced every 1 year.

3. Hydraulic components

1) Clean hydraulic components (substrates, valves, motors, pumps, oil pipes, etc.) monthly to prevent dirt from entering the system and avoid using cleaning agents;

2) After using the new machine for one month, check if there is any deformation at the bends of each oil pipe. If there is any abnormality, it should be replaced. After using it for two months, tighten all the connections of the accessories. When doing this work, the machine should be turned off and the system should be free of pressure.

Operating procedures for circular tube bending machine:

1. Strictly follow the operating procedures for machine tool workers and wear labor protection equipment according to regulations;

2. Before starting, it is necessary to carefully check whether the motor, switch, circuit, and grounding are normal and secure, and check that all operating parts and buttons of the equipment are stuck in the correct position;

3. Check the overlap and firmness of the upper and lower molds; Check whether each positioning device meets the requirements for processing;

4. When the skateboard and all positioning axes are not at the origin, run the return to origin program;

5. After the equipment is started, it should be idle for 1-2 minutes, and the skateboard should be fully moved 2-3 times. If any abnormal sound or malfunction is found, the vehicle should be stopped immediately, and the fault should be eliminated before it can work normally;

6. During work, one person should be in charge of unified command to ensure close cooperation between the operator and the feeding and pressing personnel, and to ensure that all cooperating personnel are in position before issuing the bending signal;

7. When bending the sheet metal, it must be compacted to prevent the sheet metal from lifting and injuring people during bending;

8. When adjusting the sheet metal pressing mold, the power must be cut off and the operation must be stopped before proceeding;

9. When changing the opening of the variable lower mold, no material is allowed to come into contact with the lower mold;

10. When the machine tool is working, no one is allowed to stand at the rear of the machine tool;

11. It is strictly prohibited to press the folded plate material separately at one end;

12. If the workpiece or mold is found to be misaligned during operation, it should be stopped for calibration. It is strictly prohibited to use hands to calibrate during operation to prevent hand injury;

13. It is prohibited to fold excessively thick iron plates or quenched steel plates, alloy steels, square steels, and plates that exceed the performance of the plate bending machine, in order to avoid damaging the machine tool;

14. Regularly check the overlap of the upper and lower molds; Whether the indication of the pressure gauge complies with the regulations;

15. Immediately stop the machine in case of any abnormality, check the cause and promptly eliminate it;

16. Before shutting down, place wooden blocks on the lower mold below the oil cylinders on both sides to lower the upper sliding plate onto the wooden blocks;

17. Exit the control system program first, and then cut off the power.