Micro oil and air lubrication system is a lubrication method that uses compressed air as the power to atomize micro lubricant into micron-sized suspended oil particles and deliver the suspended oil particles to the cutting area. It is very different from the traditional spray lubrication method that uses a large amount of cutting fluid or cutting oil. Only when spray lubrication and cooling is provided during the cutting process, less lubricant is left on the chips and workpiece, which is very little compared to the lubricant left by spray lubrication. Machining crankshaft oil holes using micro-lubrication technology can improve productivity and guide the development of micro oil and gas lubrication systems to meet changing market demands.

Micro oil and gas lubrication system can bring good economic and environmental benefits, because only a small amount of lubricant can be used in crankshaft oil hole machining to achieve good lubrication effect, so the factory can get considerable economic benefits after adopting micro lubrication technology. The crankshaft machining center efficiently delivers oil mist to the cutting area via the spindle and internal cold drill. The machine control system is connected to the micro-lubrication unit. Depending on the requirements of the machining process, the amount of lubricant mist delivered can be automatically adjusted by changing the opening frequency of the ball valve and the size of the drill bore passage.

The advantages of applying micro oil and air lubrication system to machine crankshaft oil holes are as follows.

(1) The oil mist can penetrate into the friction point, with good lubrication effect;

(2) Reduce the maintenance and operation cost of machine tools.

Traditional wet cutting lubrication and cooling system requires the use of a large amount of cutting fluid, which can easily cause emulsion leakage to the ground, resulting in equipment and floor contamination, and the workshop floor can become slippery and a safety hazard.

Dry cutting in some processing occasions, chip and tool separation time is short, the tool and workpiece is difficult to fully cool; poor lubrication conditions, chip removal difficulties, affecting the quality of processing.

Quasi-dry cutting combines the advantages of dry cutting and traditional wet cutting. Reliable, good lubrication effect, low pollution, adjustable oil supply, can realize micro-lubrication. Compressed air cleans the inside of the bearing and takes away heat. No residue at high temperature, dry slices are conducive to recycling and no waste liquid discharge. In line with the national advocacy of energy saving and emission reduction requirements, no pollution of the environment.

The use of micro oil and air lubrication system can greatly simplify or even save the lubricating fluid recovery device, save the daily maintenance of cutting fluid and cutting fluid waste fluid disposal costs, and greatly reduce production costs. The amount of trace lubricant used in the flow meter is very small, and a small amount of cutting fluid can achieve good cutting effect. Save resources and reduce environmental pollution. It has been favored by many metal processing manufacturers.