Cutting Edge Geometry For Turning Tools; Types Of Cutting Form Levels - Optimum OPTI turn TU 3008G Operating Manual

Wedge angle
Chip angle
Clearance angle
Clearance angle minor cutting edge
Setting angle
Setting angle minor cutting edge
Point angle
Depth of cut
Feed
In most cases the setting angle is depending on the work piece. A setting angle of 45° to 75° is
suitable for roughing. Setting angle of 90° to 95° (no tendency to chattering) is suitable for
planing.
The corner angle serves as passing from the major cutting edge to the minor cutting edge.
Together with the infeed it determines the surface quality. The corner radius must not be
selected too large as this might result in vibrations.

4.17.1 Cutting edge geometry for turning tools

Steel
Cast iron
Non-ferrous metal
Aluminium alloys

4.17.2 Types of cutting form levels

They are needed to influence the chip drain and the chip shape in order to achieve optimum
chipping conditions.
Examples of types of cutting form levels
b

Img.4-22: Cutting form level
b = 1.0 mm to 2.2 mm
t = 0.4 mm to 0.5 mm
Operation
Version 1.1.6 - 2021-9-17
The following factors influence the

chip break when turning

Setting angle

Corner radius
 Cutting edge geometry
n

Cutting speed

Depth of cut
n

Feed
ap (mm)
f (mm/
rev)
High-speed steel
Clearance
Chip angle
angle
+5° to +7° +5° to +6°
+5° to +7° +5° to +6°
+5° to +7° +6° to +12°
+5° to +7° +6° to +24°
t
Img.4-23: Cutting form level with fillet
b = 2.2 mm with fillet
Translation of original instruction
Hard metal
Clearance
Chip angle
angle
+5° to +11° +5° to +7°
+5° to +11° +5° to +7°
+5° to +11° +5° to +12°
+5° to +11° +5° to +24°
b


r
Vc
ap
f
TU3008G GB
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