1. When the four-column press operates the cartridge valve, first turn on the loading speed indicating device, and quickly turn the regulator to a suitable position to keep the indicating plate at a certain rotating speed. For example, the loading speed of 50kn should be adjusted to 1r/min on the 3000KN range, and the loading speed of 12.5kn/s on the 1500kn range should be adjusted to 0.5r/min according to the stopwatch, after adjusting the knob of the valve circuit, it remains unchanged.
液压机
2. In order to make the oil output from the oil pump enter the oil cylinder quickly and raise the piston quickly to reduce the auxiliary time, the cartridge valve or straight valve of Xinhongwei Hydraulic Press can be opened larger. When the test piece starts to load, attention should be paid to the rotation of the operating valve. According to the pressure test loading speed, the pointer movement should be synchronized with the indicator plate, especially when it is close to the broken tonnage, should not make the load load or lower than the normal value, so as not to affect the actual use of the accuracy.
3. After the specimen is broken, slowly unscrew the rotation of the valve circuit to make the oil in the oil cylinder return to the inside of the oil tank. At this time, the pendulum slowly falls down and the hydraulic pointer returns to the zero position. However, it should be noted that it is not necessary to drain all the hydraulic oil inside the oil cylinder and the working piston rod falls too low, as long as it can accommodate a test piece and be installed smoothly. After the next try, close the oil return valve and the working piston rises to maintain the original speed,four-column hydraulic pressClose the valve after commissioning.