To do a good job of grinding, you must choose the grinding fluid according to these principles! Remember! ! !
October 18, 2021
To do a good job of grinding, you must choose the grinding fluid according to these principles! Remember! ! ! Grinding has relatively high requirements for cutting fluid. Through the following articles, experts will tell you how to correctly choose cutting fluid for grinding. The surface roughness of general grinding workpiece can reach Ra (0.4-0.05) µm, and the surface roughness of super-finishing grinding can reach Ra (0.025-0.008) µm. Turning, milling, drilling, grinding and other processes require the use of cutting fluids in general processes. Among them, the amount of cutting fluid used for grinding processing is the largest, and the performance requirements of cutting fluids for grinding processing are also more complex.
When selecting cutting fluids for grinding, not only other cutting conditions must be considered, but also the characteristics of the grinding process itself: the grinding process is actually multi-cut cutting; the feed rate of the grinding process is small, and the cutting The force is not large; the grinding speed is high (30-80m/s), so the temperature of the grinding area is higher, which can be as high as 800-1000℃, which is easy to cause local burns on the surface of the workpiece; the thermal stress of the grinding process will deform the workpiece , Until it causes cracks on the surface of the workpiece; grinding will also produce a large amount of fine chips and grinding wheel sand, which will affect the surface roughness of the workpiece. Therefore, it is very important to choose the right cutting fluid for grinding. It requires good cooling and lubricity, as well as certain cleaning and rust resistance. 1) Synthetic cutting fluid can be used for general grinding process, which is converted into working fluid at a ratio of 3% to 5%. 2) Synthetic cutting fluid can be used for fine grinding processing, which is converted into working fluid at a ratio of 5%-10%. 3) For ultra-precision grinding, a mixture of 98% kerosene and 2% barium petroleum sulfonate or a chlorine-containing extreme pressure cutting oil can be selected to achieve good grinding results. However, the cutting fluid must be finely filtered before use. 4) When grinding difficult-to-machine materials, the correct selection of cutting fluid is an important way to solve the problem of grinding difficult-to-machine materials. The cutting fluid must have: Good cooling: This can not only take away a lot of heat in the grinding area, reduce the temperature of the grinding area, prevent burns and cracks of the workpiece, but also reduce the chemical effect of the grinding area and improve the adhesion of the chips to the grinding wheel.
Good lubricity: The cutting fluid can form a lubricating film on the interface between the workpiece and the grinding wheel, reducing the direct friction between the contact surface of the workpiece and the grinding wheel. Good cleaning performance: This can wash away a large amount of grinding debris and grinding wheel powder generated during grinding processing in time to reduce the blockage of the grinding wheel.
