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Four dressing methods of grinding wheel

2022-02-14



Four dressing methods of grinding wheel


In the grinding process, under the action of friction and extrusion, the edges and corners of the grinding wheel gradually become round and blunt, or in the grinding of tough materials, the grinding debris is often embedded in the pore of the grinding wheel surface, so that the surface of the grinding wheel is blocked, and finally the grinding wheel loses its cutting ability.  
So how do you fix that?  Let's take a look at the following four dressing methods of this grinding wheel, the old master knows the secret!  

① Turning dressing method:  
It is the most commonly used dressing method to use single grain diamond (or diamond pen and diamond dressing block made of finely crushed diamond) as the cutting tool to turn grinding wheel.  
Diamond tools mounted on the tool rest usually incline about 5°~15° in both vertical and horizontal directions.  The contact point between diamond and grinding wheel should be 0.5~2 mm lower than the axis of grinding wheel, and uniform low speed feed movement of diamond should be made during dressing.  
The smaller the surface roughness after grinding, the lower the feed speed should be, such as to achieve the surface roughness of Ra0.16~0.04 micron, dressing feed speed should be less than 50 mm/min.  The total dressing amount is generally about 0.1 mm on one side, and the reciprocating dressing is repeated.  The cutting depth of rough repair is 0.01~0.03 mm, and that of fine repair is less than 0.01 mm.  
② Diamond roller dressing method:  
By adopting the method of plating or powder metallurgy of diamond particles embedded in the surface of steel roller made of diamond roller, at a certain speed rotation (so as to reduce the relative speed of roller and wheel), the high-speed rotation of the grinding wheel surface grinding and rolling effect, make the keenness of the grinding wheel and the roller type surface consistent with the work surface.  
Diamond rollers are complex to manufacture and high in cost, but durable and efficient in dressing, suitable for dressing and grinding special shaped surfaces (such as threads, gears and turbine blades) in mass production.  
③ Grinding wheel dressing method:  
In order to achieve the purpose of dressing, the ultra-hard silicon carbide grinding wheel with low speed and high speed is used for grinding.  
④ Rolling dressing method:  
A hard alloy disc, a set of rollers made of undulating white iron discs or grooves of hardened steel sheets, and grinding wheels are used for rolling and extrusion dressing.  
The roller is usually installed on the dressing fixture for manual operation, which has high dressing efficiency and is suitable for dressing coarse grinding wheel.  Four dressing methods of grinding wheel Four dressing methods of grinding wheel  
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