Our factory has a QZK920 type program-controlled paper cutting machine, which once stopped after 16 hours of continuous use. After 4 hours, the machine is switched on. When the platen presses the cutting product, the vibration is accompanied by a strong noise, and the pressure on the cutting product is insufficient.
Based on past practical experience, we judged that gas was mixed in the pressure cylinder of the oil circuit and the platen. In the past, such a failure was dealt with by placing a stack of cut paper products with a height of about 100-150 mm on the work surface under the platen, and then spending on the paper press. After the paper press brake was repeatedly moved up and down several times, Gradually the gas in the fuel tank and the oil path is eliminated. After the gas is “squeezed†out, the operating performance of the pressure reducer can be restored to normal.
However, after the failure of this time, we tried repeatedly according to the above-mentioned old method for a while, and it still had no effect. The previous handling tricks were not working.
As a result, we folded the cover and carefully checked the oil path of the system, and found that the oil storage was insufficient; the tubing joint was exposed outside the reservoir; the joint connection was a bit loose. Obviously, this is due to the continuous operation of the cutter for a long time and frequent operation, which caused loosening of the tubing joint. Because of the looseness, there is a gap at the joint, and it is exposed outside the oil layer. During the action of the pressure device, the back and forth impact of the pressure oil flows, and the gas will inevitably enter through “virtualâ€. Because of the intrusion of gas, the above The failure is inevitable. Based on this, we tightened the tightening of the connections at each connection of the tubing, and adjusted the oil level. Afterwards, following the above-mentioned method, after the start-up operation several times, the fault was eliminated.
It can be seen that this paper cutter (or QZ104 hydraulic paper cutter) generates vibration during operation, and the abnormal sound and the fundamental reason for the lack of pressure is the intrusion of outside air, and the gas intrusion of the tubing connector is loosened and the pressure oil amount is reduced. Inadequacies are also closely related to this, and the elimination of such failures, in the case of merely activating the platen and not working, must check the conditions of the oil circuit system and the pressure oil, and regulate the method of adjusting the oil pipe. Tighten, check the oil level of the pressure oil and the quality condition of the pressure oil. If the oil quality deteriorates, replace it. Obviously, this is also a problem that operators should pay great attention to in daily equipment maintenance.
(Chen Jinru)
Based on past practical experience, we judged that gas was mixed in the pressure cylinder of the oil circuit and the platen. In the past, such a failure was dealt with by placing a stack of cut paper products with a height of about 100-150 mm on the work surface under the platen, and then spending on the paper press. After the paper press brake was repeatedly moved up and down several times, Gradually the gas in the fuel tank and the oil path is eliminated. After the gas is “squeezed†out, the operating performance of the pressure reducer can be restored to normal.
However, after the failure of this time, we tried repeatedly according to the above-mentioned old method for a while, and it still had no effect. The previous handling tricks were not working.
As a result, we folded the cover and carefully checked the oil path of the system, and found that the oil storage was insufficient; the tubing joint was exposed outside the reservoir; the joint connection was a bit loose. Obviously, this is due to the continuous operation of the cutter for a long time and frequent operation, which caused loosening of the tubing joint. Because of the looseness, there is a gap at the joint, and it is exposed outside the oil layer. During the action of the pressure device, the back and forth impact of the pressure oil flows, and the gas will inevitably enter through “virtualâ€. Because of the intrusion of gas, the above The failure is inevitable. Based on this, we tightened the tightening of the connections at each connection of the tubing, and adjusted the oil level. Afterwards, following the above-mentioned method, after the start-up operation several times, the fault was eliminated.
It can be seen that this paper cutter (or QZ104 hydraulic paper cutter) generates vibration during operation, and the abnormal sound and the fundamental reason for the lack of pressure is the intrusion of outside air, and the gas intrusion of the tubing connector is loosened and the pressure oil amount is reduced. Inadequacies are also closely related to this, and the elimination of such failures, in the case of merely activating the platen and not working, must check the conditions of the oil circuit system and the pressure oil, and regulate the method of adjusting the oil pipe. Tighten, check the oil level of the pressure oil and the quality condition of the pressure oil. If the oil quality deteriorates, replace it. Obviously, this is also a problem that operators should pay great attention to in daily equipment maintenance.
(Chen Jinru)
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