The Synchronous Principle Of Torsion Shaft Synchronous Brake Machine The torsion shaft that is rigid forced control of synchronization technology is utilized in the operation of the ram of the bending machine. The synchronous shaft can be positioned on the left and right wall panels of the frame body and the swing arm of the synchronous shaft is linked to the ram via the rod that connects them. During the operation of the ram, if one side is running faster, the ram pushes the swing arm of the synchronous shaft by the connecting rod to turn the synchronous shaft. Due to the rigidity of the synchronous shaft it creates a force that forces the ram to decrease its speed, so that the ram (Y1, and Y2) are controlled to run at a constant synchronization, and keep the parallel state relative with the worktable. The exact positioning of the ram is based on the rigid control of positioning of the built-in mechanical block. There are mechanical stops in the right and left oil cylinders. When you move downwards on the oil cylinder, when the location surface of the piston rod comes into contact with the locating surface of the mechanical stop then the rod of the piston is ordered to stop downward motion in order to control the final position of the stroke of the oil cylinder. The stopper mechanism between the left and right oil cylinders can be adjusted synchronously via the connecting rod, which controls the ram (Y1,Y2) and to keep it in a relative parallel position to the worktable. Electro hydraulics with synchronous principle synchronous CNC press brake machine In order to complete the bending process, the press brake machine is moved upwards and downward via two oil cylinders. The most important thing is the synchronization between two cylinders through the entire motion process and also the precise position of the dead centre. The CNC system precisely controls the timing of two oil cylinders as well as the precise positioning of the dead centre at the bottom of the electrohydraulic CNC press brake machine. The ram is smooth on one side and may be precisely positioned in the center of the bottom. The position signal of the ram is analyzed in real-time by the grating that is installed on both sides of the machine. The signal is returned to the CNC system. On the one hand the control algorithm compares the feedback data of two grating rulers, and alters the proportional servo valve of the two groups of synchronous valves, controls the opening size of the valve, and also adjusts the intake of oil into the oil cylinder so that it can control the operation of the ram within an allowable error range. The rams (Y1,Y2) are controlled to be synchronized, and keep parallel to each opposite the feedback data coming from the grating ruler may be compared with the dead center of the system's bottom to determine if the system has reached that point. The complete closed-loop electro-hydraulic servo control technology is adopted for the synchronous control of the press brake machine. the position signal from the ram is fed back to the numerical control system via the grating rulers on both sides. then the numerical control system controls the opening of the synchronous valve, adjusts the oil intake of the oil cylinder.