Numerical control cold bending forming machine for greenhouse pipe bending

The numerical control cold bending forming machine for greenhouse pipe bending is the same as that for sheet metal bending. In the case of pure bending, when the tube with outer diameter D and wall thickness t is bent by the external moment M, the outer tube wall of the neutral layer is subject to tensile stress σ 1. The pipe wall becomes thinner due to the action of; Tensile stress of inner pipe wall of neutral layer σ 1. The pipe wall thickens due to the action of. Moreover, the shape of the cross section changes from circular to approximately oval due to the action of the resultant forces F1 and F2. When the deformation is too large, cracks will appear on the outer pipe wall and wrinkles will appear on the inner pipe wall

operating procedures of the greenhouse CNC bending cold forming machine:

1. Strictly abide by the stable operating procedures of machine tool workers, and wear labor protection articles as required

2. Before starting, carefully check whether the motor, switch, line and grounding are normal and stable, and check whether the operating parts and buttons of the equipment are stuck in the correct position

3. Check the coincidence degree of upper and lower molds; Check whether each positioning device meets the requirements of being processed

4. When the upper sliding plate and each positioning axis are not at the origin, run the procedure of returning to the origin

5. After the equipment is started, it shall be idled for 1-2 minutes, and the sliding plate shall be operated for 2-3 times in full stroke. If abnormal sound or fault is found, it shall be stopped immediately, the fault shall be eliminated, and it can be operated only after it is normal

6. One person shall be responsible for unified command during work, so that the operator can closely cooperate with the feeding and pressing personnel, and the bending signal can be sent only after confirming that the cooperating personnel are in a stable position

7. When bending the sheet, it should be compacted to prevent the sheet from cocking up and hurting people during bending

8. The power supply shall be cut off when the plate material is pressed, and it shall be carried out after the operation is stopped

9. When changing the opening of the variable lower die, no material is allowed to contact the lower die

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

11. It is strictly forbidden to press the folded plate at one end alone

12. If the workpiece or mold is found to be incorrect during operation, it should be stopped and corrected. It is strictly forbidden to correct by hand during operation to prevent hand injury

13. It is forbidden to fold over thick iron plates or quenched steel plates, good quality alloy steel, square steel and plates that exceed the performance of the plate bending machine, so as to avoid damaging the machine tool

14. Frequently check the coincidence of upper and lower molds; Whether the indication of the pressure gauge meets the requirements

15. Stop the machine immediately in case of abnormality, check the cause and eliminate it in time

16. Before shutdown, place wooden blocks on the lower formwork under the oil cylinders on both sides and lower the upper sliding plate onto the wooden blocks

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