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New developments

CDS®: dressing system with integrated cooling

 
"unogran"
SINGLE GRAIN DRESSING DIAMOND
 
     
 

Description

With its point (angle: approx. 100°) the (preferably octahedral-shaped) diamond mounted in a holder initially produces a considerable amount of effective surface roughness, i.e. a free cutting grinding wheel contact surface with a good stock removal rate.

Process criteria

The service life of the grinding wheel (wearing ratio G) is minimal since, due to the described topography of the grinding wheel contact surface, only a relatively small number of cutting edges actually perform the cutting work. As a result, they quickly become blunt and/or break due to excessive stress.

As the wear of the diamond point increases, effective width "bd" initially increases rapidly due to the geometric shape of the diamond. If the correcting variables of the dressing traverse speed and the dressing position are identical, overlap rate "Ud" is therefore increased and the surface roughness generated on the workpiece is reduced. With an effective width greater than or equal to approx. 0.5 mm, the wear decreases considerably and takes on an almost constant progression curve.


Range of application

Single-profile dressing of straight grinding wheels.

External cylindrical grinding:

- Batch and line production
- All grinding wheel specifications
- All grinding wheel dimensions to which the size (weight) of the diamond must be adapted

Internal cylindrical grinding:

Due to the small contact surface of a marked diamond point, only slight forces take effect during dressing. The single grain diamond is therefore particularly suitable for dressing internal grinding tools which have small dimensions and/or are used on grinding tool carriers sensitive to vibrations. The dimension-altering wear of the diamond point exhibits a disturbing effect, i.e. a decrease in the dressing volume, only after a large number of dressing operations have been performed.

Not recommended for:

- External cylindrical and centerless grinding in large-scale production
- Dressing grinding wheels of inferior grinding quality
- Manual dressing

Application tips
There must be a perfect fit between the holder of the diamond dressing tool and the dressing device. Otherwise dimensionally stable dressing with a true profile is not possible. There is also a risk of the diamond being damaged. Carefully place the diamond on the grinding wheel.
The diamond point should contact the grinding wheel slightly below its center and at an inclination of 10-15°.
Cooling improves the dressing results considerably and is mandatory for exacting dressing requirements. A strong and continuous flow of cooling medium must be fed to the contact zone prior to the beginning of the dressing process. Shock-like cooling may destroy the diamond.
Dressing is performed at a normal or reduced grinding wheel speed.
Infeed increments of up to approx. 0.01-0.03 mm per dressing operation are possible.
Timely remounting is essential. The service life of the diamond largely depends on this.


Selection for use

The proper value of the diamond depends on its size, model and material quality. These three values must be brought into a proper relationship with the dressing task under consideration.

A) Determining the size (weight) of the diamond; diagram (illustration)


B) Riegger quality classes

Quality class
Working points
Model
Flaws*
Normal
2-3
Irregular
Yes
Extra
3-4
Octahedral
Few
Top
5-6
More distinctly octahedral
Very few

*The flaws do not impair the working point

We recommend selecting the "Extra" or "Top" class wherever increased dressing precision and economic efficiency are important.

 
     


Diamond dressing
tools


NSS
tabula
rotula
rotex
multigran
molegran
unogran
Form-dressing
diamonds
Manual diamond
dresser


Fundamentals


Definition dressing
Dressing with stationary diamond tools
Overlap rate
Formula generator


If you have any questions...


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Daimlerstraße 7-9 - 71563 Affalterbach - Tel.: +49 (0)7144 306-0

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