Grinding dresser

Under dressing is understood as the shaping and sharpening of the grinding wheel. Depending on the grinding process and material combination grinding wheel - workpiece grinding wheels must be dressed in different intervals. Also profiled discs must be adapted to each new workpiece geometry by dressing.

Purpose of dressing

Dressing with an accurate concentricity and a proper geometrical shape of the grinding wheel is attained. In addition, the dressing is used to distinguish or to calibrate a grinding wheel. It has also break out the purpose of impurities and the dulled grains layer of the grinding body and thus expose sharp grains. The heat generation is reduced during the grinding process.

There is a basic distinction between the forms, sharpening and cleaning a grinding wheel. Since grinding wheels made of conventional abrasives such as corundum or silicon carbide when shapes are sharpened the same time, this is referred to generally by always dressing. The situation is different for grinding wheels made of boron nitride and diamond in resin or metal bond. Here, the binder must be removed by the abrasive grains after molding.

Tools

When dressing for example single point diamonds, multi-grain diamond or diamond-studded dressing rolls ( roll form ) can be used. The dressing must be carried out with cooling lubricant with constant cooling, since diamonds are very sensitive to heat. The tools are located in the best case on the machine table, since the highest accuracy is achieved and further axes to control the tool omitted. Also suitable in mass production diamond profile rollers are used. The high cost of these tools pay for themselves only with the arising there numbers. As a special tool is still the steel - crushing roller worth mentioning are rolled with the profiles without relative velocity in the grinding wheels.

Dressing

Example based on a single point diamonds.

Single point diamonds are passed along in the dressing of the grinding wheel and thereby break the uppermost granular layer of the grinding wheel out. The diamond is angled quite short and stretched by 3 ° to 10 ° to the delivery and feed direction. The feeding is usually between 0.01 to 0.04 mm. If the diamond tip flattens with time, the single point diamond is rotated in the diamond holder by 90 ° in order to extend the life of the diamond. The dressing is carried out usually at certain intervals, while the grinding wheel is not in engagement. However, newer methods have been established in the market, in which the grinding wheel during the grinding process, at predetermined intervals ( in-process dressing) or continuously ( continuous dressing ) is dressed.

• Machining