Техническая информация Sumitomo - страница 10

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Troubleshooting for Milling

■ Tool Failure and Remedies

Failure Basic Remedies Remedy Examples

Excessive Flank Wear Tool Material ・Recommended insert grades

  • Select a more wear resistant grade.（ ）｛

P30 Ž P20 Coated Steel Cast Iron Non-Ferrous Alloy

Carbide Ž Ž

K20 K10 Cermet T250A, T4500A ACK100 (Coated Carbide)

Finishing DA1000 (SUMIDIA) (Cermet) BN7000 (SUMIBORON) Cutting Reduce cutting speeds. Increase Roughing ACP100 (Coated Carbide) ACK200 (Coated Carbide) DL1000 (Coated Carbide) Conditions feed rate. Excessive Crater Wear Tool Material ・Recommended insert grades

  • Select a crater-resistant grade.

Steel Cast Iron Non-Ferrous Alloy

T250A, T4500A Finishing ACK100 (Coated Carbide) DA1000 (SUMIDIA) (Cermet) Cutting Reduce cutting speeds. Reduce Roughing ACP100 (Coated Carbide) ACK200 (Coated Carbide) DL1000 (Coated Carbide) Conditions depth-of-cut and feed rate.

Chipping Tool Material Change to tougher grades. ・Recommended insert grades

P10 Ž P20 Ž P30 Steel Cast Iron K01 Ž K10 Ž K20 Finishing ACP200 (Coated Carbide) ACK200 (Coated Carbide) Tool Design Select a negative-positive cutter configuration with a large Roughing ACP300 (Coated Carbide) ACK300 (Coated Carbide) peripheral cutting edge angle (small approach angle).

  • Reinforce the cutting edge (Honing). ・Recommended cutter: SEC-WaveMill WGX Type
  • Select a strong edge insert (G Ž H). ・Cutting conditions: Refer to H20

Cutting Conditions Reduce feed rates.

Breakage Tool Material If it is due to excessive low speeds or very low ・Recommended insert grades

feed rates, select an adhesion resistant grade. Steel Cast Iron

  • If it is due to thermal cracking, select a thermal impact resistant grade. Roughing ACP300 (Coated Carbide) ACK300 (Coated Carbide)

Tool Design Select a negative-positive (or negative) cutter configuration with a large peripheral cutting ・Recommended cutter: SEC-WaveMill WGX Type edge angle (small approach angle).

  • Reinforce the cutting edge (Honing). ・ Ž

Insert thickness: 3.18 4.76mm

  • Select a stronger chipbreaker (G Ž H)

・Insert type: Standard Ž Strong edge type

  • Increase insert size (Thickness in particular).

Cutting Select appropriate conditions with ・

Cutting conditions: Refer to H20 Conditions regards to the particular application. ・Recommended insert grades

UnsatisfactoryTool MaterialSelect an adhesion resistant grade.
Machined SurfaceCarbide Ž CermetSteelCast IronNon-Ferrous Alloy

Finish

Tool Design Improve axial runout of cutting edges. WGX type* DGC type RF type*

（ ） Cutter

ACP200 ACK200 H1 (Carbide)

Use a cutter with less runout Insert

(Coated Carbide) (Coated Carbide) DL1000 (Coated Carbide)

Attach correct inserts.

Cutter WGX type FMU type RF type

  • Use wiper inserts.

Insert T4500A (Cermet) BN7000 (SUMIBORON) DA1000 (SUMIDIA)

Cutting Use special purpose cutters designed for finishing.

ConditionsIncrease cutting speeds* marked cutters can be fitted with wiper inserts.
ChatteringTool DesignSelect a cutter with sharp cutting edges. ・ Recommended cutter
  • Use an irregular pitched cutter. For Steel: SEC-WaveMill WGX Type
Cutting ConditionsReduce feed rates.For Cast Iron: SEC-Sumi Dual Mill DGC Type
OthersImprove workpiece and cutter clamp rigidity.For Non-Ferrous Alloy: High Speed cutter for Aluminium RF type

N Unsatisfactory Chip Tool Design Select cutter with good chip removal features. ・Recommended cutter: SEC-WaveMill WGX Type

Control Reduce number of teeth.

  • Enlarge chip pocket.

Edge Chipping On Tool Design Increase the peripheral cutting edge angle ・Recommended cutter: SEC-WaveMill WGX Type

Workpiece (decrease the approach angle).

  • Select a stronger chipbreaker (G Ž L).

Cutting Conditions Reduce feed rates. Burr On Workpiece Select a cutter with sharp cutting edges. ・Recommended cutter: SEC-WaveMill WGX Type + FG Breaker Tool Design

  • Increase feed rates. DGC Type + FG Breaker

Cutting Conditions

  • Select an insert designed for low burr.