In the engineering process of CNC bending machines for sheet metal processing, it is inevitable that dirt will accumulate over time. The most troublesome issue is the difficulty of cleaning hydraulic components in CNC bending machines. This article will introduce several methods for cleaning hydraulic components, hoping to help users better maintain and use CNC bending machines.
Solvent Immersion Cleaning:
Solvent immersion cleaning involves immersing the hydraulic components that need to be cleaned into a cleaning tank equipped with a heating device (usually at a temperature of 35-85 degrees Celsius). An appropriate amount of cleaning solvent is added to the water, and compressed air or steam is introduced into the cleaning solution to keep it in a dynamic state. The immersion time is 4-8 hours. Afterward, the cleaned hydraulic components are taken out and air-dried or wiped dry. For parts with severe oil contamination, manual wiping is also required during the cleaning process.
Spray Cleaning:
Spray cleaning is performed using a pressure jet cleaner and is suitable for continuous operation in large and medium-sized factory workshops. A corrosion-resistant pump is used to spray a preheated water solution at a pressure of 0.3 MPa for cleaning. Generally, the cleaned parts go through three consecutive spraying processes: pre-wash chamber, cleaning chamber, and hot water rinsing chamber. Additionally, compressed air can be used to blow off contaminants, with pulsating airflow being the most effective method.
Mechanical Scrubbing:
Mechanical scrubbing involves using soft brushes to remove dirt, ensuring component accuracy and low roughness. For example, for mesh oil filters, hard wire brushes should be avoided as they can damage the filter element or alter the filtration accuracy. For high-precision, low-roughness hydraulic valve bodies, nylon brushes with abrasive balls are used to brush the valve hole ends, hole intersections, and grooves. The brush head of the nylon brush is made by bonding black nylon bristles with a diameter of 0.3-0.6mm and green silicon carbide abrasive with an M20 specification.
Ultrasonic Cleaning:
Ultrasonic cleaning utilizes ultrasonic waves of appropriate power immersed in the cleaning solution. The waves create tiny cavities that collapse suddenly when they expand to a certain extent, forming local vacuums. The surrounding fluid rushes in at high speed to fill the vacuum, generating a powerful pressure boost and mechanical impact force on the contaminants on the surface of the parts immersed in the cleaning solution. This method has a short cleaning time, good cleaning quality, and can clean complex-shaped parts that are difficult to clean manually. Compared to manual methods, it is more than 10 times more effective and cost-effective. However, for porous materials like oil filters, which absorb sound waves, the cleaning effect may be affected.
Heating and Volatilization:
Some contaminants can be removed by heating and volatilization. However, this method cannot remove the remaining carbon, ash, and solid deposits inside the hydraulic components of the hydraulic machine.
Solvent Immersion Cleaning:
Solvent immersion cleaning involves immersing the hydraulic components that need to be cleaned into a cleaning tank equipped with a heating device (usually at a temperature of 35-85 degrees Celsius). An appropriate amount of cleaning solvent is added to the water, and compressed air or steam is introduced into the cleaning solution to keep it in a dynamic state. The immersion time is 4-8 hours. Afterward, the cleaned hydraulic components are taken out and air-dried or wiped dry. For parts with severe oil contamination, manual wiping is also required during the cleaning process.
Spray Cleaning:
Spray cleaning is performed using a pressure jet cleaner and is suitable for continuous operation in large and medium-sized factory workshops. A corrosion-resistant pump is used to spray a preheated water solution at a pressure of 0.3 MPa for cleaning. Generally, the cleaned parts go through three consecutive spraying processes: pre-wash chamber, cleaning chamber, and hot water rinsing chamber. Additionally, compressed air can be used to blow off contaminants, with pulsating airflow being the most effective method.
Mechanical Scrubbing:
Mechanical scrubbing involves using soft brushes to remove dirt, ensuring component accuracy and low roughness. For example, for mesh oil filters, hard wire brushes should be avoided as they can damage the filter element or alter the filtration accuracy. For high-precision, low-roughness hydraulic valve bodies, nylon brushes with abrasive balls are used to brush the valve hole ends, hole intersections, and grooves. The brush head of the nylon brush is made by bonding black nylon bristles with a diameter of 0.3-0.6mm and green silicon carbide abrasive with an M20 specification.
Ultrasonic Cleaning:
Ultrasonic cleaning utilizes ultrasonic waves of appropriate power immersed in the cleaning solution. The waves create tiny cavities that collapse suddenly when they expand to a certain extent, forming local vacuums. The surrounding fluid rushes in at high speed to fill the vacuum, generating a powerful pressure boost and mechanical impact force on the contaminants on the surface of the parts immersed in the cleaning solution. This method has a short cleaning time, good cleaning quality, and can clean complex-shaped parts that are difficult to clean manually. Compared to manual methods, it is more than 10 times more effective and cost-effective. However, for porous materials like oil filters, which absorb sound waves, the cleaning effect may be affected.
Heating and Volatilization:
Some contaminants can be removed by heating and volatilization. However, this method cannot remove the remaining carbon, ash, and solid deposits inside the hydraulic components of the hydraulic machine.
