Mitsubishi MWE User Manual

REGRINDING MANUAL FOR SOLID CARBIDE DRILL

MWE / MWS

April 30, 2009

type

MITSUBISHI MATERIALS CORPORATION CARBIDE & TOOLS DIVISION

 Checking conditions of the cutting edge

• Check wear conditions of and damage to the cutting edge.

• If there is serious damage such as fracture on the cutting edge, grind the edge until the damage is all

gone.

 Grinding first relief face

Fig.1

Fig.2

図３

9°～11°

Horizontal

ﾟ
0
2

• Install the drill by using collet chuck. As

shown in fig.1, set the drill phase in order

that the corner of center cutting edge and

the shoulder of outer peripheral edge

become parallel to each other when seen

from the top.

• As shown in fig.2, rotate the drill (work

head) 20°so that the point angle will be

140°.

• As shown in fig.3, set inclination angle of

the drill (work head) at 9°~11°. This angle

will become first relief angle.

Copyright © 2009 MITSUBISHI MATERIALS CORPORATION. All rights reserved

• Finishing first relief face on one side of

the cutting edge, index the drill 180°and

grind the other side until both sides are at

the same position.

*Depth of cut is 0.02 ~ 0.03mm/path.

• Finally decrease depth of cut to about

0.01mm, and finish both sides at the

position.

• For finishing, repeat oscillation 2 ~ 3

times as slow as possible. This also

serves for the purpose of spark-out.

• Grind until there is no wear or fracture left

on the cutting edge. (Please pay attention

to the damage at the margin, too.)