【 aluminum channel network 】1. Why does cutting fluid corrode aluminum products

Aluminum corrosion differentiation corrosion and electrochemical corrosion, aluminum in weak acid (less than 4.5) or strong base (more than 8.5) will be corrosion.

Prevent chemical corrosion: cutting fluid itself is alkaline, zui good cutting fluid PH value is less than 8.5, and add aluminum corrosion inhibitor. There are cutting fluid in the alkaline additives on the surface of the aluminum workpiece dried, will also produce yellow spots, this is also corrosion.

Electrochemical corrosion: the processed products should not be placed on the iron plate or iron products, and with cutting fluid, easy to produce electrochemical corrosion.

2. The difference between aluminum cutting fluid and metal cutting fluid

Generally, there are emulsions, kerosene and diesel for metal cutting fluids, and the range of choice is relatively wide. Aluminum cutting fluid generally USES kerosene or paraffin paraffin solution. The advantage of using kerosene or kerosene paraffin in aluminum cutting fluid is that the chip is not easy to stick to the knife cutting tumor, the workpiece finish is better. Milling aluminum parts with other cutting fluid effect is not as good as kerosene paraffin.

Actually look do not have what distinction, performance is about the same, have anticorrosion, prevent rust, cooling, environmental protection to wait for a variety of performance. Also widely used in stainless steel, mold. Just aluminum products cutting fluid is more trial in aluminum alloy, used in aluminum alloy is also better, the effect is more obvious, and the metal cutting fluid, used in the metal cutting fluid is ok.

3. Distinction and use of emulsifying and synthetic cutting fluids

The synthetic cutting fluid does not contain mineral oil, and is composed of water-soluble anti-rust agent, oil-based agent, extreme pressure anti-wear additive, surfactant, preservative and defoaming agent and other additives. The diluent is transparent or translucent. It has excellent cooling and cleaning properties, suitable for high-speed cutting; Transparent solution, with good visibility, especially suitable for CNC machine tools, processing centers and other modern processing equipment, long service life.

The concentrated emulsion is mainly composed of mineral oil or synthetic oil (content of 50% -- 80%), emulsifier, anti-rust agent, oil agent, extreme pressure anti-wear additives and preservatives. When the concentrate is used, water is added directly to dilute the emulsion, and the diluent is opaque and milky white.

4. Choice of cutting fluid when cutting stainless steel

The selection principle of cutting fluid must meet the requirements of cutting performance and performance, that is, should have good lubrication, cooling, rust and cleaning performance, in the process of processing can meet the technical requirements, reduce tool loss, reduce the processing surface roughness, reduce power consumption, improve production efficiency. Stability of use should also be considered. Therefore, the selection of cutting fluid should follow the following principles:

1) cutting fluid should have no pungent smell, do not contain harmful additives to human body, to ensure the safety of users.

2) cutting fluid should meet the requirements of equipment lubrication, protection management, that is, cutting fluid should not corrode the metal parts of the machine tool, do not damage the machine tool seals and paint, will not remain on the guide rail of the machine tool hard colloidal precipitate, to ensure the safety and normal operation of the equipment.

3) the cutting fluid shall meet the rust-proof requirements between the workpiece processes and shall not rust the workpiece. Sulfur-containing cutting fluid should not be used when machining copper alloys. When machining aluminum alloy, should choose the PH value of neutral cutting fluid.

4) cutting fluid should have excellent lubrication and cleaning performance. The cutting fluid with high zui load and low surface tension was selected and evaluated by cutting fluid test.

5) cutting fluid should have a long service life, which is particularly important for machining centers.

6) cutting fluid should try to adapt to a variety of processing methods and a variety of workpiece materials.

7) cutting fluid should be low pollution, and waste liquid treatment method.

8) cutting fluid should be cheap and convenient to prepare.

Therefore, the user in the selection of cutting fluid, according to the specific processing conditions of the enterprise, the first primary election that the comprehensive performance is good 2, 3 kinds of cutting fluid, after the actual trial, determine the performance to meet the processing requirements, the price of suitable cutting fluid workpiece material performance is very important for the choice of cutting fluid.