Page 138 - UNION

part. teChNiCAl dAtA part.
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turning turning
& FlANK WeAr VS CUttiNG diStANCe troUBle ShootiNG &
Milling Milling

types Status cause countermeasures

• Variation of dimension • Wear by grinded surface • Reduce cutting Speed
Flank Wear • Deteriorated finishing surface • Excessive feed rate and • Use larger corner radius
• Increasing machining load cutting speed • Use high wear-resistant grade

• Reduce cutting Speed
• Wear by chips (remarkable
• Deterioration of chip disposal • Use smaller lead angle
Crater Wear with ductile cast iron)
• Deteriorated finishing surface • Check edge geometry
• Excessive cutting speed
Cutting Condition • Use high wear-resistant grade
Workpiece : FC-25(HRC>45) • Severe cycle of heating & • Reduce cutting speed
Velocity : 800m/min Thermal • Deteriorated finishing surface cooling during cutting • Reduce feed rate
Feed : 0.5mm/rev Cracking • Occurrence of chipping • Excessive feed rate and • Change to dry machining
Depth : 2.0mm cutting speed • Use tougher grade
Insert : CNGN 120412 E040
• Reduce cutting depth
• Deteriorated finishing surface • Excessive feed rate and • Reduce feed rate
Notch Wear
• Increasing machining load cutting depth • Use tougher grade
• Increase coolant supply

• Use tougher grade
• Occurrence of fire flower • Excessive feed rate
Edge • Check edge geometry
Splintering • Occurrence of noise • Falling-off of BUE • Increase stability of the system
• Increasing Machining load • Weak cutting edge
• Use larger lead angle
FlANK WeAr VS CUttiNG diStANCe • Reduce cutting speed
Plastic • Variation of dimension • High machining load • Reduce feed rate
Deformation • Chipping of cutting edge • Use of improper grade • Reduce cutting depth
• Use harder grade

• Increase cutting speed
• Deteriorated finishing surface
Built-up-Edge • Variation of dimension • High affinity with work piece • Increase feed rate
• Use tougher grade
• Low cutting speed
• Occurrence of chipping
• Use larger rake angle
• Use tougher grade
• Occurrence of fire flower • Using low toughness Insert • Reduce feed rate
Breakage
• Cutting impossible • Using improper clamping holder • Reduce cutting depth
• Increase stability of the system

270 union Materials cutting tools 271