The main basis for judging the function of hydraulic die cutting machine is: the punching force and the cutting speed. The punching force is very large, but the cutting speed is very low, or the punching speed is very high, but the machine with small punching force cannot successfully complete the punching task. For mechanically driven cutting machines, the cutting speed is generally high, about 250 times/min; the cutting speed is variable, and the average cutting speed is: 200 mm/sec. The cutting speed of the hydraulic cutting machine is generally: greater than 75 mm / sec.
The difference between the mechanically driven cutting machine and the hydraulically driven cutting machine is mainly determined by the different characteristics of the two transmissions: the mechanical transmission is a rigid transmission, and the hydraulic transmission does have a certain flexibility.
The characteristic of the hydraulic cutting machine is that when the punching head acts on the workpiece through the die, the pressure in the working cylinder does not reach the rated pressure, and the pressure will increase as the time of contact (cutting into the workpiece) increases, until The electromagnetic reversing valve receives the signal, the reversing valve reversing, and the punching head starts to reset; at this time, the pressure in the cylinder may not reach the set rated pressure value due to the limitation of the time of the pressure oil entering the cylinder; that is Say, the system pressure has not reached the design value, and the die cutting has been completed.