STATIONARY DRESSERS


Natural or synthetic diamond dressers like single point (HDM) or multi point, chisel (HDP), impregnated (HDCP) or needle (HDCS), blades (HDPH), roller (HDR) or manual (HDPM)

STATIONARY DRESSERS


SINGLE POINTS DRESSERS (HDM)

These are used to dress abrasive grinding wheels without the need for subsequent operations. Generally, these are natural diamond stones mounted on a substrate. Shape depends on the dressing tool used.

Stone size should be calculated so that it is capable of absorbing the heat given off by the abrasive wheel requiring dressing.
For this purpose, POMDI has produced a set of tables used to estimate diamond weight (measured in carats), taking into account the engineering and geometric parameters of the wheel requiring dressing.
This makes it possible to obtain the total Q value by adding up the individual Q values according to the abrasive wheel’s characteristics.
To use a single-point diamond dressing tool, first attach the base to the grinder support. This is normally inclined at an angle of 10º to 15º to the dressing surface.
The diamond dresses the wheel by working on the cutting edges, since these are the strongest points. Once this edge has been dressed, it is turned to find other edges, trying to keep the minimum surface area in contact with the grinding wheel. Once the point and the cutting edges have been dressed, the diamond can be removed and a new, second point fitted.
Users are recommended to cool abrasive wheels during dressing.
Abrasive wheels can also be dry-dressed. In this case, users should avoid cooling once the operation has begun, since the subsequent thermal shock could crack or even break the diamond.

CHISEL DRESSERS (HDP)

These tools are used to dress and/or profile abrasive wheels of various shapes. They usually cut the diamonds at an angle and radius to the vertex and are centred on the axis. This enables users to shape profiles on abrasive wheels, using the tool as a pantograph and maintaining the same point of tangency throughout its travel.
Diamonds with greater compactness are used in manufacture of these tools, one of the applications of which is as hardness gauges.

IMPREGNATED DRESSERS (HDCP)

These are used to dress flat surfaces with undemanding finish quality and precision criteria.

It is very important to specify the grain of the grinding wheel to dress so as to
select an appropriate diamond grain (see reference table):

MULTI-POINT DRESSERS (HDCS)

These are used to dress 36-grain (or coarser) grinding wheels. These highly resistant tools are used for flat dressing. They permit deep passes on wide grinding wheels and are specially recommended for centreless grinding machines.

DRESSING BLADES (HDPH)

These are used to dress medium- and fine-grain grinding wheels used for both flat and profile grinding. This tool type achieves a better finish than HDCS. They are considered universal dressing tools and can be made of diamond powder, natural stone or CVD.

DRESSING ROLLERS (HDR)

These easy-to-use agglomerate or single-point tools are very low-cost.
The stones are arranged in rows around a circumference. Single-row dressing rollers are used for profiling while multi-row rollers are used for flat grinding. Once 5 mm have been worn away, the tool is turned to present a surface with new diamonds.

MANUAL DRESSING TOOLS (HDPM)

These are used to dress straight wheels manually. They are especially recommended for machines not equipped with a diamond dressing tool.