Общий каталог Mitsubishi 2020 - 2021 - страница 1729

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y CORNER RADIUS

1.575 Feed (IPR) Corner radius effects the cutting edge strength Feed

and finished surface. In general, a corner

radius 2 ― 3 times the feed is recommended.Theoretical1.181
DepthSurface
of CutRoughness.787

.394 Feed Corner Radius (inch) Theoretical

Depth Work Material : Alloy steel (200HB) of Cut Surface Grade : P20 Roughness Cutting Speed : vc=395 SFM ap=.020 inch

Corner Radius and Finished Surface

Flank Wear Crater Wear (Crater Depth)

Work Material : Alloy steelWork Material : Alloy steel
(280HB)(200HB)
Grade : P10Grade : P10
CuttingCutting
Conditions : vc=330 SFMConditions : vc=460 SFM
ap=.079 inchCorner Radius (inch)ap=.079 inch
f=.013 IPRf=.008 IPR
Corner Radius (inch)Tc=10 min
Corner Radius Size and Tool Life Due to FracturingCorner Radius Size and Tool Wear
a Effects of Corner RadiusWhen to Decrease Corner RadiusWhen to Increase Corner Radius
1. Increasing the corner radius improves the surface
u Finishing with small depth ofu When the cutting edge
finish.
2. Increasing the corner radius improves cuttingcut.strength is required such as
edge strength.u Thin, long work material.in interrupted cutting and
3. Increasing the corner radius too much increasesu When the machine has pooruncut surface cutting.
the cutting resistance and causes chattering.rigidity.u When roughing a work

4. Increasing the corner radius decreases flank and material with large diameter. rake wear. u When the machine has high 5. Increasing the corner radius too much results in rigidity. poor chip control.

a Corner Radius and Chip Control Range

R.039"

P

Depth of Cut (inch) Note 1) Please refer to page P008 for chip shapes (A, B, C, D, E).

Work Material : AISI 1045 (180HB) Insert : TNGG331R TNGG332R TNGG333R (P10) Holder : ETJNR33K16 (Side Cutting Edge angle 3°) Cutting Speed : vc=330 SFM Dry Cutting