Four dressing methods of grinding wheel
In the grinding process, the abrasive grains of the grinding wheel are gradually rounded and dull under the action of friction and extrusion, or when grinding tough materials, the grinding debris is often embedded in the pores on the surface of the grinding wheel, making the grinding wheel The surface is blocked, and finally the grinding wheel loses its cutting ability.
How to fix it? Let’s take a look at the following four grinding wheel dressing methods, the secrets that the master knows!
①Turning and finishing method:
Using single-grain diamonds (or diamond pens or diamond dressing blocks made of finely divided diamonds) as a tool for turning grinding wheels is the most commonly used dressing method.
The diamond tool installed on the tool holder is usually inclined by about 5°~15° in both vertical and horizontal directions; the contact point between the diamond and the grinding wheel should be 0.5~2 mm lower than the axis of the grinding wheel, and the diamond will be fed at a uniform low speed during dressing. To move.
The smaller the surface roughness after grinding is required, the lower the feed rate should be. To achieve the surface roughness of Ra0.16~0.04 microns, the dressing feed rate should be less than 50 mm/min. The total amount of dressing is generally about 0.1 mm on one side, and the dressing is repeated many times. The depth of cut for rough trimming is 0.01 to 0.03 mm each time, and for fine trimming is less than 0.01 mm.
②Diamond roller dressing method:
A diamond roller made of a large number of diamond particles embedded on the surface of a steel roller by electroplating or powder metallurgy, etc., rotates at a certain speed (to reduce the relative speed of the roller and the grinding wheel), grinding and rolling the surface of the high-speed rotating grinding wheel Function to make the grinding wheel obtain a sharp working surface consistent with the surface of the roller.
Diamond rollers are complex to manufacture and costly, but they are durable and have high dressing efficiency. They are suitable for dressing and grinding special shaped surfaces (such as threads, gears and turbine blade tenons) in mass production.
③Grinding wheel dressing method:
Using low-speed rotating super-hard silicon carbide grinding wheel and high-speed rotating grinding wheel to grind to achieve the purpose of dressing.
④Rolling finishing method:
Using a hard alloy disc, a set of rollers set by a wave-shaped white iron disc or a grooved hardened steel sheet, and the grinding wheel for rolling and extruding.
The roller is generally installed on the dressing jig for manual operation, with high dressing efficiency and suitable for the dressing of rough grinding wheels. Four major dressing methods for grinding wheels Four major dressing methods for grinding wheels Four major dressing methods for grinding wheels