How to choose the cutting fluid of China cnc tapping tapper machine automatic drilling machine is also a doorway, if you think that there is only one cutting fluid, then you are very wrong. We generally divide cutting fluids into the following categories.
1. Aqueous solution cutting fluid, cutting fluid with water as the main component, water has good thermal conductivity and cooling effect, but the simple aqueous solution makes the metal rust and the lubrication performance is poor. Therefore, a certain amount of additives, such as anti-rust additives, surface active substances and oily additives, is often added to the aqueous solution, so that it has both good anti-rust performance and certain lubrication performance. When configuring the aqueous solution, pay special attention to the water quality, and if it is hard water, it must be softened.
2. Emulsion cutting fluid, the emulsified oil is absorbed and released with 95%-98% water, which is a milky white or translucent liquid, which has a good cooling effect, but the lubrication and rust prevention performance is poor. Usually a certain amount of oil-based cleaning and anti-rust additives are added to prepare a cleaning emulsion or anti-rust emulsion.
3. The main component of cutting oil cutting fluid is mineral oil, a few use animal oil or composite oil, pure mineral oil can not form a solid lubrication and anti-rust effect at the friction interface. So where are these three cutting fluids used? During machining, the machining allowance is large, and the amount of cutting used is large, which produces a large amount of cutting heat. When cutting with high speed steel milling cutter. The main purpose of using cutting fluid is to reduce the cutting temperature and reduce milling cutter wear. Printed alloy tools have good heat resistance, generally do not use cutting fluid, if necessary, can use low concentration emulsion or aqueous solution, but must be continuously and fully poured, in order to avoid the hard paper alloy blade in the high temperature state of huge internal stress and cracks, the surface roughness value is required to be small. Generally, cutting fluids with better lubrication performance are selected, such as high-concentration emulsions or cutting oils containing extrusion additives. Cutting fluid is required for cutting plastic materials, and cutting brittle materials such as cast iron and brass is generally not used. So as not to chip, cut and crush debt. When processing difficult materials such as high-strength steel and high-temperature alloy on the moving parts of the machine tool, cutting fluid containing extreme pressure additives should be selected because the cutting process is in a state of extreme pressure lubrication friction. When cutting non-ferrous metals and copper and aluminum alloys, in order to obtain high surface quality and accuracy, 10%-20% emulsion kerosene or a mixture of kerosene and mineral oil can be used. However, sulfur-containing cutting fluids cannot be used, because sulfur has a corrosive effect on non-ferrous metals. When cutting magnesium alloy, aqueous solution should not be used to avoid combustion.