How to Avoid Faults in CNC Bending Machines
Release Time: 1/16/2026 5:42:47 PMBy SENCO
The failure of CNC bending machines should mainly be prevented. Some customers purchase hydraulic bending machines but only use them without any maintenance or attention to avoid factors that may cause failure of the hydraulic bending machines. As a result, the failure rate of the hydraulic bending machines they use is relatively high. Therefore, the task for bending machine manufacturers is to mainly prevent the failure of hydraulic bending machines, so that your hydraulic bending machines can achieve the longest service life.
The failure of the hydraulic system usually occurs due to three reasons: contamination, air entering, and overheating.
1. Ensure the cleanliness of the hydraulic oil of the CNC bending machine, reduce contamination. The hydraulic oil of the CNC bending machine should be selected correctly to prevent impurities and contaminants from invading the hydraulic oil. The hydraulic oil of the CNC bending machine is not only the medium of the hydraulic system but also a lubricant.
Therefore, its cleanliness of the oil and the performance of the system, the reliability and service life of the hydraulic components have a great impact. The main reason for the contamination of the hydraulic oil of the CNC bending machine is: first, the external part of the hydraulic actuator is dirty, and impurities enter the hydraulic system; second, the oil is not filtered with a filter screen when adding oil; third, the container used is not clean; fourth, impurities enter when checking the oil level; fifth, severely worn and damaged seals cannot be replaced in time; sixth, impurities such as iron filings generated during inspection and repair are not cleaned up thoroughly; seventh, the storage of the hydraulic oil is improper, and impurities enter the oil tank, such as water. During use and maintenance, remember to pay attention to the above issues, then the occurrence of hydraulic system failures can be reduced.
2. Prevent the hydraulic oil of the CNC bending machine from mixing air, causing cavitation. The compressibility of the hydraulic oil of the CNC bending machine is very low, but the compressibility of air is high. If the hydraulic system contains a small amount of air, it will have a great impact on the system performance. The air dissolved in water will overflow in large quantities when the pressure is low, forming cavitation; if the pressure is high, the air bubbles will rapidly burst under the impact of pressure, generating explosion noise, and releasing a large amount of heat energy, causing damage to the components and heating of the oil. To prevent air from entering the hydraulic system, the following points must be achieved: first, the return oil pipe is inserted below the oil surface; second, prevent loose connections and damaged seals; third, avoid incorrect oiling methods when adding oil to the oil tank; fourth, avoid the inlet of the hydraulic pump being placed with a filter to cause high suction resistance and prevent dissolved gases from separating.
3. Prevent excessive temperature of the hydraulic oil of the CNC bending machine. The temperature of the hydraulic oil of the CNC bending machine is generally controlled between 40℃ and 80℃. If it is always above 80℃, it will cause the viscosity of the oil to be very low, leading to leakage and high temperatures of the hydraulic components, resulting in a short service life. Therefore, when choosing the radiator, all aspects of factors should be fully considered. In terms of the selection of oil viscosity, it should also be carefully considered.
High viscosity will increase the energy loss during the flow of the oil, and low viscosity will cause more leakage. Therefore, attention should be paid during use and regular inspection should be carried out to prevent excessive temperature of the hydraulic oil, and the hydraulic oil should be filtered regularly and inspected regularly to ensure the operation of the hydraulic system, and also to reduce the wear and corrosion of the hydraulic components and extend the service life of the hydraulic system. Bending machines are divided into manual bending machines, hydraulic bending machines and CNC bending machines.
Hydraulic bending machines are divided into: torsion shaft synchronous, machine-hydraulic synchronous and electro-hydraulic synchronous according to the synchronous mode. Hydraulic bending machines are divided into: upper-moving type and lower-moving type. Including the bracket, worktable and clamping plate. The worktable is placed on the bracket, and the worktable is composed of the base and the press plate.
The base is connected to the clamping plate through a hinge, and the base is composed of the shell, coil and cover plate. The coil is placed in the depression of the shell, and the top of the depression is covered with the cover plate.
The failure of the hydraulic system usually occurs due to three reasons: contamination, air entering, and overheating.
1. Ensure the cleanliness of the hydraulic oil of the CNC bending machine, reduce contamination. The hydraulic oil of the CNC bending machine should be selected correctly to prevent impurities and contaminants from invading the hydraulic oil. The hydraulic oil of the CNC bending machine is not only the medium of the hydraulic system but also a lubricant.
Therefore, its cleanliness of the oil and the performance of the system, the reliability and service life of the hydraulic components have a great impact. The main reason for the contamination of the hydraulic oil of the CNC bending machine is: first, the external part of the hydraulic actuator is dirty, and impurities enter the hydraulic system; second, the oil is not filtered with a filter screen when adding oil; third, the container used is not clean; fourth, impurities enter when checking the oil level; fifth, severely worn and damaged seals cannot be replaced in time; sixth, impurities such as iron filings generated during inspection and repair are not cleaned up thoroughly; seventh, the storage of the hydraulic oil is improper, and impurities enter the oil tank, such as water. During use and maintenance, remember to pay attention to the above issues, then the occurrence of hydraulic system failures can be reduced.
2. Prevent the hydraulic oil of the CNC bending machine from mixing air, causing cavitation. The compressibility of the hydraulic oil of the CNC bending machine is very low, but the compressibility of air is high. If the hydraulic system contains a small amount of air, it will have a great impact on the system performance. The air dissolved in water will overflow in large quantities when the pressure is low, forming cavitation; if the pressure is high, the air bubbles will rapidly burst under the impact of pressure, generating explosion noise, and releasing a large amount of heat energy, causing damage to the components and heating of the oil. To prevent air from entering the hydraulic system, the following points must be achieved: first, the return oil pipe is inserted below the oil surface; second, prevent loose connections and damaged seals; third, avoid incorrect oiling methods when adding oil to the oil tank; fourth, avoid the inlet of the hydraulic pump being placed with a filter to cause high suction resistance and prevent dissolved gases from separating.
3. Prevent excessive temperature of the hydraulic oil of the CNC bending machine. The temperature of the hydraulic oil of the CNC bending machine is generally controlled between 40℃ and 80℃. If it is always above 80℃, it will cause the viscosity of the oil to be very low, leading to leakage and high temperatures of the hydraulic components, resulting in a short service life. Therefore, when choosing the radiator, all aspects of factors should be fully considered. In terms of the selection of oil viscosity, it should also be carefully considered.
High viscosity will increase the energy loss during the flow of the oil, and low viscosity will cause more leakage. Therefore, attention should be paid during use and regular inspection should be carried out to prevent excessive temperature of the hydraulic oil, and the hydraulic oil should be filtered regularly and inspected regularly to ensure the operation of the hydraulic system, and also to reduce the wear and corrosion of the hydraulic components and extend the service life of the hydraulic system. Bending machines are divided into manual bending machines, hydraulic bending machines and CNC bending machines.
Hydraulic bending machines are divided into: torsion shaft synchronous, machine-hydraulic synchronous and electro-hydraulic synchronous according to the synchronous mode. Hydraulic bending machines are divided into: upper-moving type and lower-moving type. Including the bracket, worktable and clamping plate. The worktable is placed on the bracket, and the worktable is composed of the base and the press plate.
The base is connected to the clamping plate through a hinge, and the base is composed of the shell, coil and cover plate. The coil is placed in the depression of the shell, and the top of the depression is covered with the cover plate.
