For hobbing machining, it is recommended to use a small amount of lubrication.

Conventional gears are usually processed by wet cutting. With the development of machine tools, tools and materials, high production efficiency, high precision, energy saving, environmental protection, and low cost gear manufacturing have become a reality. American scientific research institutions began to study the gear dry cutting technology, and after the research, the technology was promoted and applied. In the application process, it is found that the dry-cut gear processing has high requirements on the heat resistance and wear resistance of the machine tools and tools, and the input cost of the gear processing enterprises is high. Dry-cutting methods are not practical for existing gear processing equipment. Existing gear processing companies face problems in improving processing efficiency, reducing production costs, and improving the environment. The micro-lubrication technology can not only replace the cutting oil lubrication method in the traditional gear processing, but also has obvious advantages in processing efficiency, reducing production cost and improving the environment. Hobbing processing generally adopts the following technical route: increasing the cutting speed and shortening the contact time between the cutting tool and the workpiece, so that the cutting heat is carried away by the chip.

The reason why the micro-lubrication technology can achieve good application effect in gear processing is that the micro-lubrication uses ultra-fine oil mist particles to penetrate into the cutting area, providing a good lubricating oil film, suppressing the generation of cutting friction heat, reducing the cutting force and improving The processing efficiency avoids the problem of microcracks caused by thermal shocks repeatedly received by the teeth during the hobbing in the wet cutting state, resulting in a decrease in the life of the cutting tool.

The basic principle of hobbing processing: 3 nozzles are usually set in the gear processing to spray micron-sized oil mist particles into the cutting area. One of the nozzles maintains a certain distance to spray the oil mist on the rake face, so that the hob enters the cutting. It can have an oil film, which can suppress the temperature rise, reduce the wear of the hob, prevent the adhesion and improve the processing quality of the workpiece and the life of the cutting tool.

The field case data of the micro-lubrication hobbing application is as follows: the hob line speed is about 110m/min; the cost saving is more than 30%.
in conclusion:

(1)
Cutting edge in the hobbing process—chips, cutting edges—The capillary formed by the friction between the workpieces is the main route for the penetration of lubricating oil. The micro-lubrication system has a small diameter, high speed and good permeability, which can provide better lubrication.

(2)
The friction during the cutting process is one of the main factors affecting the cutting force. The ability of the micro-lubrication to effectively penetrate into the cutting zone, the good lubrication effect reduces the cutting force during the cutting process.

(3)
Compared with traditional cutting and dry cutting, micro-lubrication cutting can effectively control the wear process of cutting tools and prolong the use time of cutting tools.

(4) According to the case data, the consumption of trace lubricating oil is very low.

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Production introduction:

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