CNC precision machining parts processing is usually divided into: rough machining, semi-finishing, finishing

Obviously, precision machining and high-precision grinding are fine machining.

High precision grinding: often referred to as fine grinding

Precision cnc machining and high precision grinding are subordinate relationships.

The fine grinding rod is pressed on the rotating workpiece under a certain pressure and oscillates along the axis to carry out micro-cutting finishing. High-precision cnc machining is generally arranged after the finishing process, and the processing allowance is small (generally 5 to 8 microns). Commonly used for processing a variety of internal and external cylindrical surface, conical surface, plane, spherical surface, such as crankshaft, roll, brass high-precision machining shaft, and rolling bearings. Rings and various precision parts.

After the workpiece is super-finished, the surface roughness can reach R0.08-0.01 micron, and the surface processing line is formed by the intersection of the corrugated curve, which is easily shaped into an oil film, improving the lubrication effect, so the wear resistance is good. Due to the low temperature of the cutting zone, the surface layer has a slight plastic deformation, and the surface has a low residual compressive stress. Commonly used ultra-fine grinding rod particle size is generally W0.5 ~ W28; The commonly used cutting fluid is about 80% kerosene and about 20% oil, which is strictly filtered; bar pressure is generally 0.05-0.3MPa; The amplitude of the strip is generally 1 ~ 6mm; The circumference speed of the workpiece is generally not more than 700m/min.

If it is necessary to improve the shape accuracy of the part and remove the ground deterioration layer, the remaining amount must be removed by about 0.03 mm. At this time, the superfinishing process is divided into two stages: coarse grinding and fine grinding, and coarse grinding is carried out by coarse grinding rod and high speed. The bar pressure, on the other hand, takes a smaller value during finishing. Rough grinding adopts rough grinding rod and high speed for rough machining. The bar pressure, on the other hand, takes a smaller value during finishing. Rough grinding adopts rough grinding rod and high speed for rough machining. The bar pressure, on the other hand, takes a smaller value during finishing.