How to choose cutting fluid for China cnc automatic tapping drilling machine factory is also a way, if you think there is only one kind of cutting fluid, then you are very wrong. We generally divide cutting fluid into the following categories.
1. Aqueous solution cutting fluid, the cutting fluid with water as the main component, water has good thermal conductivity and cooling effect, but the pure aqueous solution makes metal rust and has poor lubricating performance. Therefore, a certain amount of additives are often added to the aqueous solution, such as antirust additives, surface active substances and oily additives, etc., so that it has both good antirust performance and certain lubricating performance. Pay special attention to the water quality when configuring the aqueous solution. If it is hard water, it must be softened.
2. Emulsified cutting fluid, made by absorbing and releasing emulsified oil with 95%-98% water, it is milky white or translucent liquid, which has good cooling effect, but poor lubricating and antirust performance. Usually, a certain amount of oil-based pressure-cleaning additives and anti-rust additives are added to prepare a pressure-cleaning emulsion or an anti-rust emulsion.
3. Cutting oil The main component of cutting oil is mineral oil, and a few use animal oil or compound oil. Pure mineral oil cannot form a solid lubrication and antirust effect on the friction interface. So where are these three kinds of cutting fluids used? When machining, the machining allowance is large, the cutting amount used is large, and a large amount of cutting heat is generated. When cutting with a high-speed steel milling cutter. The main purpose of using cutting fluid is to reduce the cutting temperature and reduce the wear of the milling cutter. Printed alloy cutting tools have good heat resistance. Generally, cutting fluid is not used. If necessary, low-concentration emulsion or aqueous solution can be used, but continuous and sufficient pouring is necessary to avoid cracks due to the huge internal stress of the hard paper alloy blade in a high temperature state. The surface roughness value is required to be small. Generally, cutting fluids with better lubricating properties are selected, such as high-concentration emulsions or cutting oils containing extrusion additives. Cutting fluid is required for cutting plastic materials, and cutting fluid is generally not used when cutting brittle materials such as cast iron and brass. So as not to break the cutting mill debt. When processing difficult-to-machine materials such as high-strength steel and high-temperature alloys on the moving parts of the machine tool, since the cutting process is in a state of extreme pressure lubrication and friction, cutting fluids containing extreme pressure additives should be selected. When cutting non-ferrous metals, copper, and aluminum alloys, in order to obtain higher surface quality and precision, 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. Do not use aqueous solution when cutting magnesium alloys to avoid burning.