Cutting fluid oil mist is harmful, control is very important

December 15, 2023

Cutting fluid oil mist is harmful, control is very important

Atomization is the process of converting mechanical energy into droplet surface energy, mainly due to the intense impact of liquid on the fixed and rotating units in the machine tool system, which is broken by it and forms small droplets floating in the working environment. In the process of metal processing, due to the use of metal cutting fluid, a large number of oil mist particles will be formed in the air.

1. The impact of oil mist produced in processing on the human body

CNC machine tool processing process, generally produce a large number of oil mist containing polychlorinated biphenyls, hidden damage to the physical and mental health of the staff, 0.3-3.5 micron particles inhaled into the human body poses a health hazard, oil mist deposited in the work area, easy to cause work-related accidents and other accidents.

Impact on machine tools: A large amount of oil mist generated by high-speed cutting is adsorbed on equipment and workpieces for a long time, which may become the cause of failure in the machine tool and electrical system. It brings no small trouble to the maintenance of the machine tool, and also greatly reduces the machining precision of the machine tool.

Waste resources and damage the environment: if the oil mist gas is discharged to the outside, it will damage the environment; If it can be effectively recycled, it can save resources.

Impact on fire alarm: Oil mist deposited on the wall and equipment for a long time has potential fire hazards.

2. So how is the metal cutting fluid oil mist produced?

In order to effectively lubricate, cool and clean, metal cutting fluid in the process of use to go through the pump cycle, injection and high-speed rotation of the tool or workpiece fierce impact and high temperature evaporation and other processes, which determines the cause of the oil mist is very complex, mechanical, physical and chemical factors interwoven, work together.

However, not all factors have a decisive impact on the production of oil mist, the formation of metal cutting fluid oil mist during processing can mainly be attributed to atomization and evaporation.

Evaporation is due to the large amount of heat generated in the cutting zone, which is transferred into the cutting fluid so that its temperature is significantly higher than the saturation temperature, and boiling and steam are generated on the solid-liquid contact surface. These vapors condense at the core of small droplets or other particles in the surrounding air, forming an oil mist.

3. So how to control the metal cutting fluid oil mist?

Prevention of oil mist

1, it is recommended to use low oil content cutting fluid

2, change the process, using dry cutting, take trace lubrication

3, the use of anti-fog polymer control and suggestions

4. Improve the ventilation effect of the workshop

5, stop the liquid supply system when not needed to reduce foam

6. Cover the oil ditch or tank with oil baffle and oil mist collector.

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