FLAT GRINDING

Grinding is a cutting, travel-defined production process for machining surfaces with abrasive agents on grinding machines. It belongs to the group of cutting types with a geometrically undefined cutting edge.

The advantages of grinding compared with other types of cutting are its suitability for machining hard materials, high dimensional and shape accuracy and low undulation and roughness
(FC = 1-3ìm) of the ground surface. Grinding is similar to milling, the difference being in the large number of irregularly arranged cutting edges.

The following variables are characteristic of the grinding process:

• The high degree of hardness and brittleness of the abrasive grains (mostly corundum = Al₂O₃)

• The large number of cutting edges

• The very small cutting cross sections (cutting thickness)

• Simultaneous engagement of several cutting edges

• High cutting speeds

• Significantly more negative rake angle of the cutting edges (pressing of the cutting edges)

Flat grinding

With flat grinding, a distinction is made between reciprocal grinding and creepfeed grinding.

Reciprocal grinding:

Narrow infeed, high workpiece feed speed, short, thick chips; heavy wheel wear

Creepfeed grinding:

Wide infeed, low workpiece feed speed, long, thin chips; high thermal stress on the workpiece surface.

Used for same-direction or counter-direction grinding.

"(Quelle: Wikipedia)"