Diamond dressers

Figure 3.18 shows several types of diamond dressers. These are classified based on the following ... 

There are several types of dressing tools other than diamond dressers. Jet cleaning [30] is one of the dressing methods in which high-pressure water and/ or gas will be adopted in order to remove slurries or other residual contaminants. 

T. Feng, Pad conditioning density distribution in CMP process with diamond dresser, IEEE Trans. Semicond. Manuf. 20 (2007) 464—475. 

K.-R. Chen, H.-T. Young, ModeUing on dressing effects in chemical mechanical polishing with diamond dressers, Int. J. Abrasive Technol. 3 (2010) 1—10. 

Natural gem-quality diamonds are expensive and difficult to machine and fabricate into useful shapes for general industrial purposes. Except for a few cases (i.e., diamond-studded rotary drill bits, dressers, diamond-tipped glass cutters, fine superabrasive powders... 

Diamond is extensively used for the dressing of precision grinding wheels. The grinding process using conventional, diamond and cBN abrasives is extensively used in the finishing of ferrous, tungsten carbide and ceramic components. Here, the geometrical tolerance, the surface finish of the wheel and its condition is critical and the dresser s function is to achieve and maintain these characteristics. 

From Fig. 42 it can be seen that CVD diamond exhibits almost identical rates of wear compared to single crystal synthetic diamond. Effectively this means that CVD diamond offers a range of geometric and orientation advantages in dresser design without having to compromise on the wear resistance of the dresser. 

Figure 42. CVD diamond and Monodress single point dresser wear relative to volume of grinding wheel removed.

Zhang, C., Ohmori, H., Marinescu, I., and Kato, T., Grinding of ceramic coatings with cast iron bond diamond wheels. A comparative study ELID and rotary dresser. International Journal of Advanced Manufacturing Technology, Vol. 18, 2001b, pp. 545-552. 

In contrast to lapping wheels, profiling of grinding wheels in this range of size is much more difficult. On the one hand, the stiffnesses of the wheel dresser are often not sufficient. On the other hand, the material costs of the used diamond coatings are so high that multiple removal of greater profile... 

Dresser> -Tracks -Diamond size -Dresser size... 

The removal rate of the dresser may change in each area depending on the dress time. The mechanism incorporated in the dresser uses the above characteristic to control the tracks of the dresser to finally improve the removal rate uniformity. The removal rate may change because of the size of diamond used for the dresser or to the dressCT size. Therefore, dresser type selection is also an important parameter for improving removal rate uniformity. 

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