The same principle is used for high speed cutting with tools. Microtools require a lubricant that is lower in viscosity than water because of the need to allow coolant to reach the cutting edge of a high speed rotating tool. The emulsion-based coolant has a higher viscosity than the water-based coolant and is therefore not suitable as a lubricant for high-speed machining of micro-tools.
The micro-spray cooling system used in processing can use alcohol (ethanol) as a cooling liquid, which is ideal for cooling lubrication of non-ferrous metals and certain plastic materials. However, the use of oil-based coolants in the processing of steel-based materials, that is, the advantages of alcohol coolants is not suitable for the processing of steel materials, because cemented carbide tools may cause instantaneous discharge on the steel surface, if exposed to ethanol-based cooling A relatively high dynamic potential can be generated in the liquid.
Commonly used spray coolants are usually petroleum-based products, and these coolants need to be properly recycled after use, at an additional cost. Alcohol is evaporated after use, so there is no need to dispose of it or recycle it. Although alcohol is flammable, its low volatilization point makes it a very effective cooling lubricant for high speed machining. Because alcohol is a natural compound, it is environmentally friendly, free of waste, and requires no cleaning, so there is no associated cost. In addition, the use of alcohol as a cooling lubricant does not leave any oil stains on the workpiece, thereby avoiding the secondary operation of degreasing the workpiece, and the cost of these processes is quite high.
(3) High-speed cutting technology
The smaller the tool diameter, the higher the spindle speed required to effectively cut the workpiece. When milling, drilling, milling and engraving with micro-tools, high-frequency spindles with a speed range of 6000 to 60,000 r/min are ideal. High-speed cutting technology uses a high-speed, small step, large feed processing strategy. Imagine moving your hand through a burning candle flame. If your hand moves slowly, the flame will have enough time to burn your hand; and if your hand passes quickly, the flame will not be able to burn the skin. The principle of high-speed machining with micro-tools is similar. When the tool moves quickly, the cutting heat is too late to pass into the workpiece and cause various problems.
During the cutting process, the tool continuously cuts the chips away from the workpiece. About 40% of the heat of cutting generated is derived from the frictional heating of each of the flank and the chip, and about 20% is derived from the deformation (bending) of the chip. Therefore, a total of about 60% of the cutting heat is derived from the inside of the chip. High-speed cutting technology attempts to take most of the heat away from the chips for cleaner cutting. The higher machining quality is based on good tool cooling, lower cutting forces and therefore reduced machining vibration.
The high spindle speed reduces the chip load (cut depth) to less than 0.005" (0.13mm). Such a small depth of cut can significantly reduce the cutting force between the tool and the workpiece material. High speed / small cutting force machining Less heat, can reduce tool deviation, and can realize the processing of thin-walled workpieces. With these advantages, high-speed cutting can obtain better surface quality, lower cutting temperature, easy workpiece clamping, and machining accuracy. Higher.
Previous page next page
Various products of Bathroom Faucet, providing product images and basic parameters with each Bathroom Faucet and Bathroom Faucet Leaking; We are a professional Chinese manufacturer of Bathroom Faucet, and look forward to your cooperation!
Kitchen Faucet ,Bathroom,Basin Faucet
Guangdong Huayou Hardware Products Co.,Ltd , http://www.gudsink.com