Общий каталог Mitsubishi 2020 - 2021 - страница 1724

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EFFECTS OF CUTTING

CONDITIONS FOR TURNING

y EFFECTS OF CUTTING CONDITIONS

Ideal conditions for cutting are short cutting time, long tool life, and high cutting accuracy. In order to obtain these conditions, selection of efficient cutting conditions and tool, based on work material, hardness, shape and machine capability is necessary.

y CUTTING SPEED

Cutting speed effects tool life greatly. Increasing cutting speed increases cutting temperature and results in shortening tool life. Cutting speed varies depending on the type and hardness of the work material. Selecting a tool grade suitable for the cutting speed is necessary.

1640 Work Material : AISI 1045 Tool Life Standard: VB = .012 inch

1310UE6105Depth of Cut : .059 inch
Feed : .012 IPR
MC6025Holder : MCLNR-164C
(SFM985MC6015Insert : CNMG432
Dry Cutting
AP25N
655NX2525MP3025
NX3035
VP15TF
100

10 20 30 40 50 60 70 80 90 100

Tool Life (min) P Class Grade Tool Life Work Material : AISI 304 Tool Life Standard: .012 inch

Depth of Cut : .059 inch MC7015 Feed : .012 IPR Holder : MCLNR-164C (SFM Insert : CNMG432MA MC7025 Dry Cutting US735 US7020 MP7035 UTi20T

Tool Life (min)

M Class Grade Tool Life

1640 Work Material : AISI No.45B Cast Iron

1310MC5005Tool Life Standard: .012 inch
Depth of Cut: .059 inch
MC5015Feed : .012 IPR
985Holder: MCLNR-164C
UC5115Insert : CNMG432
(SFMUE6110UC5105Dry Cutting
655AP25N

490 NX2525 HTi10

UTi20T 330 260 195

P

10 20 30 40 60 100

Tool Life (min) K Class Grade Tool Life a Effects of Cutting Speed 1. Increasing cutting speed by 20% decreases tool life to 1/2. Increasing cutting speed by 50% decreases tool life to 1/5.

2. Cutting at low cutting speed (65―130 SFM) tends to cause chattering. Thus, tool life is shortened.