32
7.1.5 Grinding sickle-shaped cutter knives (convex cutting edge)
Grinding, polishing and deburring releases abrasive particles that can
enter the eyes.
Wear protective glasses.
CAUTION
Switch on the grinding machine (7-17/1) and cool-
ant unit (7-17/2).
With sickle-shaped cutter knives, each cutting
segment is ground separately (1 segment =
corner to corner).
Using the grinding lever, move the knife evenly
over the grinding wheel with moderate force.
Grind until a small burr forms on the cutting edge.
Now reduce the grinding angle on the hand wheel
(7-48/1) by 5° and grind until the first chamfer is
only approx. 3 mm wide.
Reduce the grinding angle by 5° again and grind
until the second chamfer is approx. 3 mm wide.
Repeat the process until approx. 5° is reached.
7. Operating the HV 207
Figure 7-17
Switching on the grinding machine
and coolant unit
Figure 7-18
Grinding burr
1
2
Figure 7-19
Reducing the grinding angle
(convex grinding)
1