Общий каталог Mitsubishi 2020 - 2021 - страница 1745

• C009A_CUTTING TOOLS
• INDEX
• A_TURNING INSERTS
• B_CBN & PCD TURNING INSERTS
• C_EXTERNAL TURNING TOOLS
• D_SMALL TOOLS
• E_BORING BARS
• F_GROOVING/CUTTING OFF
• G_THREADING
• H_HSK-T TOOLS
• I_SOLID CARBIDE END MILLS
• J_EXCHANGEABLE HEAD END MILLS
• K_ROTATING TOOL INSERTS
• L_INDEXABLE MILLING
• M_DRILLING
• N_SPARE PARTS
• P_TECHNICAL DATA

TECHNICAL DATA Wm Wm' TECHNICAL DATA DRILL WEAR CONDITION AND CUTTING EDGE DAMAGE y DRILL WEAR CONDITION The diagram below shows a simple drawing depicting the wear of a drill's cutting edge. The generation and the amount of wear differ according to the work material and cutting conditions used. But generally, the peripheral wear is largest and determines a drill tool life. When regrinding, the flank wear at the point needs to be ground away completely. Therefore, if there is large wear, more material needs to be ground away to renew the cutting edge. We We : Chisel edge wear width Wf : Flank wear width (The middle of the cutting edge) Wf Wo : Outer corner wear width Wo Wm : Margin wear width Wm' : Margin wear width (Leading edge) y CUTTING EDGE DAMAGE When drilling, the cutting edge of the drill can suffer from chipping, fracture and abnormal damage. In such cases it is important to take a closer look at the damage, investigate the cause and take countermeasures. b b a c a c P P030