The present situation and research progress of cutting oil for automobile parts processing

The latest network technology forum

2017-04-26

With the continuous updating of automobile parts manufacturing process, high performance, multi function and long life requirements are proposed for cutting oil. At the same time, because of the cutting oil in contact with the workers in the use of more closely, the users of its low smoke, low skin irritation and low odor and other requirements are also more stringent.

At present, the number of metal processing oil consumption in the transportation equipment manufacturing industry, which is based on the processing of automobile parts, is still ranked first in all industries, accounting for 40%~45%. A medium-sized auto parts supporting enterprises - a diesel engine factory every year to use a variety of metal processing oil in about 400 tons, of which a variety of cutting oil is about 200 tons, about 60 tons of cutting fluid.

The use of cutting fluid in the main process

Engine oil

Major auto plants generally have their own dedicated engine production lines, and some in the auto factory engine factory production, and some by the co production of the engine plant. The materials of diesel engine are steel and cast iron. In recent years, the application of aluminum alloy has been extended from the engine piston, cylinder head and so on to the gearbox shell, hub and other large parts.

Display in the investigation of another car power company, its engine plant with large flow concentration for the liquid concentration, liquid volume ranging from 20~80 tons. The material of the cylinder head is aluminum alloy. The main processing technology for the milling plane rough boring fine boring hole drilling tapping. The water-soluble cutting fluid used in the present invention is emulsion and microemulsion. The daily management and maintenance management of the oil tank is more standardized, and the personnel are assigned to the site to monitor the oil concentration, pH value, anti rust and other functions.

Cutting fluid for automobile die processing

Automotive parts production process including die stamping die, injection mold, forging mold, etc.. According to the production of parts and components can be divided into different types of automotive piston mold, cylinder head mold, automotive parts, such as die. Auto mould is a technical product, its quality is an important indicator of the level of manufacturing of automobile, especially the automobile stamping die, stamping parts quality and production efficiency, have a direct relationship with the quality of mold design and manufacturing.

Processing method of automobile die is the main milling and processing power, in the processing of connecting rod forging die as an example, the processing process is generally: profile rough machining and profiling milling groove, heat treatment, shape finishing, CNC EDM machining groove, surface strengthening treatment. With the shorten delivery cycle of mould voice rising, high speed milling technology has attracted more and more attention to the automotive mould enterprise, technology is the basic characteristic of the high efficiency and the high accuracy, effectively reduce the production cost. After the heat treatment of the material, the high speed milling machine is used for the roughing and semi finishing of the mould cavity, leaving a small margin.

In the above process, the cutting oil is mainly used in high speed milling with high quality cutting oil and EDM oil. EDM oil, high flash point, low viscosity, low aromatic content, good oxidative stability can dredge the discharge channel, rapid discharge, precipitation of metal particles and carbon powder, and better thermal stability, long service life, high value.

Transmission system oil

In a variety of transmission gearbox parts processing system in the variety and quantity of all kinds of gear oil accounted for most, such as gear hobbing, gear rolling, cutting, grinding, cutting and grinding process, are required to use the corresponding supporting oil. The company according to the market demand change, in a few years the field of metal processing technology accumulation background, processing all kinds of gear oil in recent years new, very good to meet the new requirements of the new process, update the parameters in the practical application of customers.

In the new study China base of a locomotive vehicle Co. Ltd., a world advanced Hof Le RAPID2500 gear grinding machine, gear grinding machining the maximum diameter of 2600mm, processing speed, machining accuracy of the workpiece surface with high requirements, high demands on supporting the use of grinding oil. RONKEN grinding oil is very good to meet the requirements, has been in the application of a number of high-grade gear grinding machine, the main processing of EMU gear, Metro gear and Metro transmission shaft, etc..

Research progress of cutting fluid

crankshaft

At present, China"s automobile manufacturing industry, especially the new factories, new projects are increasingly using high-speed machining centers, high-speed CNC equipment and other advanced cutting technology. Cooling and lubricating cutting technology has a very important impact on the application of advanced cutting technology, the application of cooling and lubricating cutting technology is good, and the application of advanced cutting technology is more effective.

The processing precision, high-grade precision machine processing load and processing efficiency are greatly improved, the lubrication properties, supporting cutting oil cleaning performance, cooling performance, low oil fog performance and service life have a new requirement. At the same time, the requirements of antirust oil and heat treatment are also increasing.

The corresponding research work has been ongoing, such as has been developed with smaller evaporation tendency and has a good oil mist tends to suppress the low mist cutting oil is developed, many can replace sodium nitrite in water soluble anti rust agent. After the investigation and study, the vast majority of the main engine plant water based rust preventive solution or cutting fluid are not containing sodium nitrite, but there are still a number of applications in the supporting plant.

Grinding oil for high precision machine tools

R & D mainly for the German NIELS company, such as the production of large gear forming gear grinding machine matching oil. The metal cutting machine tool for gear finishing requires that the grinding oil can better reduce the grinding temperature in the grinding process, improve the surface quality of the workpiece and the service life of the grinding tool, and can effectively wash the grinding powder and the end of the grinding wheel. In the formulation of the development process, not only to make full use of the synergistic effect between additives, such as the conflict between lubrication and cleaning, but also need to balance.

Long life water-based cutting fluid

Water based products are easy to breed microorganisms often affect the life of the product. The use cycle of water based cutting fluids is of particular concern to the users of concentrated liquid systems. In addition to the rational use of fungicides for maintenance, some of the technical lubricant suppliers have begun to pass the formula itself, the antibacterial design, so that the product has a high degree of biological stability, effective extension of life.

Cutting oil without chlorinated paraffin

As a traditional extreme pressure agent, chloride is not only cheap, but also has good wear resistance and abrasion resistance. However, chlorinated paraffin, especially short chain (C10 ~ C13) chlorinated paraffin, which is harmful to marine organisms after discharge, can cause the death of shellfish and fish. Therefore, many countries have short chain chlorinated paraffin (especially C12) included in the list of toxic emissions, and some countries have the highest content of chlorine in the provisions of the oil, such as the provisions of the Japanese JIS chlorine content should not exceed 15%. With the enhancement of people"s awareness of environmental protection and the improvement of various laws and regulations, the processing oil containing no chloride is developed in time by using high alkali value sulfonate, compound polyester and phosphoric acid.

Maintenance management of cutting fluid

Preparation before dispensing

In addition to the liquid, in addition to the use of mechanical means to remove the accumulation of dirt, but also on the system for cleaning and disinfection, to prevent microbial infection of the new liquid, leading to rapid decay of new liquid. Disinfection of the system can be used to select a special system of disinfectant, the general requirements of the disinfection solution in accordance with a certain concentration of dilution in the system within a few hours, in order to achieve the purpose of sterilization.

Detection of cutting fluid in use

The detection of cutting fluid is an important part of cutting fluid maintenance, in order to find out the problems in use and make adjustments in time. The conventional detection indexes of cutting fluid include concentration, pH value, antirust property, stability and so on. Some of the maintenance management work more standardized, no obvious deterioration of conventional indicators of concentrated liquid supply system, but also can be used to detect and filter, impurity content and viscosity parameters, in order to determine the intrinsic quality of cutting fluid.

The concentration of cutting fluid is too low will lead to lower cutting fluid lubrication, rust resistance and bacteria increased sharply, thus affecting the service life of the cutter and the workpiece equipment precision and work efficiency; the concentration is too high, it may cause the bubble in the process of increasing, and cause skin irritation to the operator, from the economic point of view is a waste.

PH value is an important index of cutting fluid. The pH value of the cutting fluid is too high, which may cause the operator"s skin allergy and non ferrous metal corrosion; the pH value is too low, it will affect the rust resistance and antibacterial property of the cutting fluid. At present, the pH value of the cutting fluid is mainly pH test paper method and pH method. The pH method can accurately obtain the pH value of the solution, while the pH test paper method is simple, but it is more suitable for field application. Good stability of the cutting fluid is conducive to long-term preservation of product performance.

Concluding remarks

Chinese automobile market is showing to meet the diverse needs of our manufacturing, cutting oil for processing parts of the continuous progress in the processing technology and the increasingly stringent environmental regulations under the impetus has been great development in automobile manufacturing industry to make full use of the advanced cutting technology, management technology, to fully realize the superiority of the application the quality of metalworking fluids. As a well-known brand in the field of metalworking fluid, RONKEN has been widely used in the automotive industry. Let us join hands to jointly promote the rational use of auto parts processing oil, to contribute to the burden on enterprises.

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