Wharbo Precision Manufacturing Co.,Ltd

Compared with most steels and cast iron materials,Aluminum has many distinctive features on the physical performance: strength and hardness has increased many compared to pure aluminum, but lower compared to steel,also cutting force is smaller and with good thermal conductivity.

Because aluminum is soft, plasticity, easy to stick the knife cutting, BUE formed on the tool, welding phenomenon may occur on the blade during high-speed cutting, the tool lose cutting ability, and affect the machining accuracy and surface roughness. In addition, the thermal expansion coefficient of aluminum is large, cutting heat easily lead to the thermal deformation of the workpiece, reduce machining accuracy.

First. aluminum machining cutting fluid

To sum up, the choose of aluminum alloy cutting fluid is very important and must ensure good lubrication, cooling, filtration and rust resistance, therefore,cutting fluid for aluminum cnc machining is different from ordinary,choosing a suitable cutting fluid is essential.

Depending on the processing conditions and precision requirements, you should choose a different cutting fluid. Since the high-speed machining can generate a lot of heat, such as high-speed cutting, drilling, heat generated if can’t be taken away cutting fluid timely, stick a knife phenomenon will occur, there may even be BUE, it will seriously affect the workpiece machining roughness and tool lifetime,but also cause heat deformation of the workpiece, seriously affecting the accuracy of the workpiece. Therefore, to choose a cutting fluid is necessary to consider its own lubrication,and its cooling performance.

For grinding, the grinding debris is very small, and in the grinding process will produce a lot of heat, it is necessary to consider the lubrication and cooling performance of cutting fluid but also consider cutting fluid filtration. Such as the choice of cutting fluid viscosity through the large, cuttings can not be deposited down or filtered out, it will with the coolant circulation to scratch the surface of the workpiece processing zone, which affects surface finish machining. Therefore, the choice of ultra-fine grinding for grinding or friction low viscosity grinding oil or semi-synthetic cutting fluid grinding minus.

In the choice of cutting fluid, in addition to considering lubrication, cooling and other performance cutting fluid, but also consider the performance of corrosion resistance, cost and ease of maintenance and other aspects of the cutting fluid. Cutting oil is easy to choose a relatively low viscosity base oil antifriction additives, so that both can reach lubricated friction, may have good cooling and easy filtration. But there is a problem cutting oil low flash point, heavy smoke at high speed cutting, high risk factor, and volatile fast, user costs correspondingly high, therefore under conditions permitting, try to use a water soluble cutting fluid.

For aqueous machining fluid, which is more important to consider the rust. Now commonly used in water-based rust inhibitor aluminum silicate and phosphate esters have, for a long time process workpiece stored in the processing easily used with a cutting liquid phosphoric ester type rust inhibitor, as a silicon-based material and aluminum length Time contact corrosion produce black "silicon spots" occur. Ph value of the cutting fluid is maintained at more than 8 to 10, if poor rust, aluminum under alkaline conditions, this can easily be etched. Therefore, water-soluble cutting fluid must have good anti-corrosion properties of aluminum.

Second, the use of aluminum machining cutting fluid and Maintenance

Formulation and use of aluminum machining cutting fluid is basically the same with the ordinary, but in the choice of dilution water to be more stringent. Because many of the aluminum ion in the water will have a corrosive effect, if these ion content is too high will reduce the rust-proof cutting fluid performance, especially in inter-process rust on, for example, chloride, sulfate ions and heavy metal ions. In addition, some of the ions also with aluminum cutting fluid rust inhibitor reacting reduce rust and stability of the cutting fluid, such as calcium and magnesium ions occur. So try to choose a smaller hardness dilution water, or ion-exchange water softening after dilution, in order to ensure that the cutting fluid use of effects and life.

Aluminum processing cutting fluid maintenance in addition to cutting fluids such as ordinary daily maintenance, but also need to pay attention to the following points:

1, filtration

Because the stability of the reaction of aluminum alloy aluminum soap, damage-prone cutting fluid under alkaline conditions, it should be cut down immediately filtered out of aluminum scrap, aluminum scrap and cutting fluids to avoid recurrence and reactions affect the use of cutting fluids effects and life. Grinding out the grinding process aluminum scrap both small and light, it is difficult precipitation continues, as does not filter or filter is not sufficient, aluminum scrap processing zones will be taken with the cutting fluid circulation system while scratching the surface impact machined surface gloss.

2, ph value

Because aluminum cutting fluid for the ph value is very sensitive, and therefore regularly ph value of the aluminum cutting fluid for testing, such as abnormal should be timely adjusted. Use ph control in 8-9 ph value in order to avoid excessive corrosion of the workpiece or the ph value is too low to make the bacteria multiply and affect the stability and performance of cutting fluid.

3, the timing of additional new solution

Both to ensure good lubrication cutting fluid, cutting fluid also ensures good rust resistance and antiseptic properties to extend the life of cutting fluids.

CONCLUSIONS

Select aluminum processing cutting fluid is extremely important, both to ensure good cutting fluid lubrication, corrosion resistance, but also a good stability, filtration and ease of maintenance, the only way to meet the requirements of the products processed to minimize the use of cost cutting fluid.