The working principle of the spring bending machine is mainly to bend the spring by mechanical or hydraulic means. The following is the working principle of a common spring bender:

1. Spring positioning: Put the spring to be processed on the workbench of the bending machine and fix it by fixture or other positioning devices.

2. Bending action: Bending force is applied to the spring through the bending mechanism of the bending machine. This bending force can be mechanical, for example, by rotating a bending shaft or using a bending die; It can also be hydraulic, and the bending die or other bending parts are pushed by the hydraulic cylinder to complete the bending action.

3. Control the bending angle: In the bending process, the bending angle of the spring is adjusted by controlling the movement of the bending mechanism. Usually, accurate bending angle control can be achieved by adjusting the rotation angle of the bending shaft, the stroke of the hydraulic cylinder or other control parameters.

4. Keep the bending shape: after the bending action is completed, keep the bending shape of the spring through a holding device or fixture until the bending operation is completed or the next processing is needed.

5. Repeated operation: The above steps can be repeated as needed to bend multiple springs.

Different types of spring benders may have different working principles and structures, but in general, they all bend springs by applying bending force to them. In practical application, it is also necessary to select the appropriate bending machine and processing technology according to the material, size and shape of the spring to ensure the processing quality and efficiency.