In the grinding process, under the action of friction and extrusion, the edges and corners of the grinding wheel are gradually rounded and dull, 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 the grinding wheel loses its cutting ability.

  How to fix it? Let's take a look at the following four methods of grinding wheel dressing, 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 a universal dressing method.

The diamond tool installed on the tool holder is usually inclined about 5°~15° in both the vertical and horizontal directions; the contact point between the diamond and the grinding wheel should be 0.5~2 mm below 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 50mm/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 speed (to reduce the relative speed of the roller and the grinding wheel), and produces grinding and rolling effects on the surface of the high-speed rotating grinding wheel. , So that the grinding wheel obtains a sharp working surface that is 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, in order to achieve the purpose of dressing.

  ④Rolling finishing method:

  Using cemented carbide discs, a set of rollers set from wavy white iron discs or grooved hardened steel sheets, and the grinding wheel for rolling and extrusion trimming.

  The roller is generally installed on the dressing jig for manual operation, which has high dressing efficiency and is 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