Definition of surface finish and roughness of diamond grinding wheel

Finish and roughness are the same thing, just an old standard and a new one. The diamond grinding wheel uses diamond abrasive as raw material, and uses metal powder, resin powder, ceramics and electroplated metal as binders respectively. The circular bonded abrasive tool with a through hole in the center is called diamond grinding wheel (alloy grinding wheel). The surface roughness of the diamond grinding wheel after the part is machined. It used to be called diamond wheel surface finish.

In the original national standard, the surface finish of diamond grinding wheel is divided into 14 grades, and its code is 1, 2...14. The larger the last number, the higher the surface finish of the diamond grinding wheel, that is, the smaller the value of the surface roughness of the diamond grinding wheel.

Basic Concept of Surface Roughness of Diamond Grinding Wheel

On the surface of the diamond grinding wheel of the machined parts, there will always be some macroscopic and microscopic geometrical errors. The microscopic geometrical error on the surface of the diamond grinding wheel of the part is formed by a series of peaks and valleys with small spacing on the surface of the diamond grinding wheel of the part. The degree of ups and downs of these tiny peaks and valleys is called the surface roughness of the diamond grinding wheel of the part.

The surface roughness of the diamond grinding wheel is an important indicator to measure the surface machining accuracy of the diamond grinding wheel of the parts. The roughness of the surface of the diamond grinding wheel of the part will affect the friction between the two mating parts contacting the surface of the diamond grinding wheel and the wear of the moving surface (the failure of the parts). A basic type), the sealing of the fitting surface, the working accuracy of the matching surface, the fatigue strength of the rotating parts, the beauty of the parts, etc., and even the corrosion resistance of the surface of the diamond grinding wheel of the parts (interpretation: refers to rot, disappearance, erosion, etc.) Sex matters.

Roughly machined diamond grinding wheel surfaces, such as rough turning, rough planing, cutting and other diamond grinding wheel surfaces, and diamond grinding wheel surfaces processed with rough boring tools and rough grinding wheels are generally rarely used.

Surface condition of diamond grinding wheel = obvious tool marks, rough diamond grinding wheel surface, welding seam before welding, rough drilling wall, etc., generally non-bonded diamond grinding wheel surface, such as shaft end face, chamfer, gear and pulley. The non-working diamond grinding wheel surface of the side and keyway, the weight-reducing hole diamond grinding wheel surface, and the matching diamond grinding wheel surface of unimportant parts, such as the end faces of pillars, brackets, shells, bushings, shafts, covers, etc. The diamond grinding wheel uses diamond abrasive as raw material, and uses metal powder, resin powder, ceramics and electroplated metal as binders respectively. The circular bonded abrasive tool with a through hole in the center is called diamond grinding wheel (alloy grinding wheel). The surface of the free diamond grinding wheel of fasteners, the surface of the diamond grinding wheel of the through hole of the fastener, the surface of the non-centering diamond grinding wheel of the inner and outer splines, the surface of the circular diamond grinding wheel of the gear top ring which is not used as a measurement reference, etc. The surface of the diamond grinding wheel that does not form a match, such as the end face of the box, shell, end cover and other parts. Fixed bearing surfaces that require centering and mating characteristics such as centering shafts, key and keyway working diamond grinding wheel surfaces.

The surface of the diamond wheel for unimportant tightening threads. The surface of diamond grinding wheel that needs knurling or oxidation treatment, the housing hole for installing G-class bearing with a diameter of more than 80mm, the tooth surface of ordinary precision (precision) gear, the hole for positioning pin, the surface of diamond grinding wheel for V-type pulley, the outer diameter is fixed The outer diameter of the inner spline of the center, the centering shoulder of the bearing cap, the surface of the diamond grinding wheel, and the surface of the diamond grinding wheel that needs to ensure the centering and matching characteristics, such as the surface of the diamond grinding wheel of the tapered pin and the cylindrical pin, and the surface of the G-grade precision rolling bearing. Shaft diameter and housing hole, shaft diameter of medium speed rotation, diameter over 80mm

The shaft diameter and housing hole of the E and D grade rolling bearings, the surface of the diamond grinding wheel for grinding gears, etc., require long-term maintenance of stable matching properties (interpretation: stable and stable; no change) with the surface of the diamond grinding wheel, IT7 grade shaft and hole matching Diamond grinding wheel surface, gear diamond grinding wheel surface with high precision, important parts affected by variable stress, shaft diameter diamond grinding wheel surface matched with E and D grade bearings with a diameter of less than 80mm, diamond grinding wheel surface of the shaft in contact with the rubber seal , IT13 ~ IT16 grade holes and shaft gauges with a size larger than 120mm measure the surface of the diamond grinding wheel, and the surface of the diamond grinding wheel of important parts that are subject to variable stress during work. Diamond Grinding Wheel The hardness of the diamond abrasive determines the main characteristics of the diamond grinding wheel, which can efficiently grind hard alloys, glass, ceramics and other difficult-to-machine materials, and the grinding tools have the longest service life. Ensure the fatigue strength, corrosion resistance and durability of the parts, and do not damage the surface of the diamond grinding wheel during operation, such as the surface of the shaft diameter diamond grinding wheel, the surface of the diamond grinding wheel that requires airtightness and the surface of the supporting diamond grinding wheel, and the conical centering diamond grinding wheel surface etc. The diamond grinding wheel surface of important parts that are subjected to large variable stress during work. Guaranteed precisely centered conical diamond wheel surface. Hole diamond grinding wheel surface for hydraulic transmission. The inner diamond grinding wheel surface of the cylinder liner, the outer diamond grinding wheel surface of the piston pin, the instrument slide rail surface, the valve working surface. IT10~IT12 grade holes and shaft gauge measuring surfaces with size less than 120mm.