In actual sheet metal fabrication operations, the core workflow of a press brake relies on the coordinated action ofelectromagnetic clamping and hydraulic drive, resulting in a clear and controllable overall operating logic. Once the machine is activated and enters operational mode, the internal circuitry delivers a steady current to the electromagnetic coils via wiring. When energized, the coils generate a stable and controllable electromagnetic force. Under this force, the upper clamping plate descends smoothly, securely clamping the metal sheet between the clamping plate and the machine base. This prevents issues such asshifting, slipping, or misalignment of the sheet during the bending process from the outset.

A four-roll plate rolling machine is a specialized piece of equipment designed for bending and straightening metal sheets, as well as for forming and bending metal plates. As such, it can effectively utilize auxiliary devices to roll conical cylinders. It can also perform rough shaping of metal sheets. All of these rolling operations are controlled by the hydraulic drive system that raises and lowers the lower rollers of the four-roll plate rolling machine. The successful completion of the entire sheet metal rolling and shaping process relies primarily on the lifting and control system of the lower rollers in the four-roll plate rolling machine.

As a core piece of specialized equipment in the field of sheet metal forming, a roll forming machine primarily performs plastic deformation to transform flat sheets into curved or cylindrical components. The upper work roll is the key component responsible for the core rolling function; during operation, it applies direct downward pressure to the sheet metal and works in conjunction with the lower work roll and side rolls to complete the bending, rolling, and end pre-bending processes. Throughout this process, it is subjected to extreme bending stresses, compressive forces, and friction, resulting in extremely complex loading conditions.