Общий каталог Tungaloy 2020 - 2021 - страница 1651

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Milling tools B

Trouble shooting i n face milling

TroublePossible causesCountermeasures
Rapid wear of• Improper insert grade selection (Insuffi cient wear resistance)• Use a grade with high wear resistance P30/P20der
cutting edge• Excessive cuttingspeed• Select cuttingspeed suited for Workpiece material and insertgradelhol
• Inadequate feed• Use standard cuttingcondition in catalogasguideToo
•Improper Insert grade selection (Insuffi cient toughness)• Use agrade with high fracture resistance P10/P20Ext.
• Cutting hard material and• Decrease cutting speed
Rapid chipping ofunfavorable surface condition• Use cutter with strongcuttingedgeolder
cutting edge• Excessive feed•Proper selection of feed conditions, using recommended cutting conditions in catalog as guideoolh
• Excessive pressure applied on cutting edge• Proper selection of engaging angleInt. T
• Machining superalloys• Use a negative-positive type cutter with large corner angleg
• Cracking due to thermal shock• Select insert grade of stronger thermal shock resistance • Decrease cutting speedE eadin
• Continuous use of excessively worn insert• Shorten replacement standard time of insertThr
• Cutting hard material• Use cutter with stronger cutting edge • Use cutter of larger corner angleing
Fracturing• Obstruction to chip fl ow • Recutting of chips after chip welding• Use cutter with better chip expulsion • Select insert grades diffi cult for chips to adhere Cemented carbides/cermets, coated grades • Use air blowF Groov e tool
• Excessively slow cutting, too fi ne feed• Select cutting speed and feed optimized for insert grade and Workpiece materialG niatur
Ei hi•Cutting soft material such as aluminium, copper, mild steel• Use cutter with large rake angleMi
xcessve cp ldi bild• Cuttingstainless steel• Coatedgrades(AH130､AH3135)ter
weng or u-up on cutting edge• Use of cutter with negative rake or too small rake angle• Use cutter with large rake angleH ng cut
• Effect of built-up edge• Increase cutting speed • Appropriate cutting depth (fi nish allowance)Milli
• Change insert grade For steels : P/coated/cermet For cast irons : K/coatedI dmill
• Effect of face cutting edge run out• Proper installing of insertsEn
Rough fi nish• Use insert of high dimensional accuracy • Cleaning of insert pocketol
• Continuous use of excessively worn insert• Shorten replacement standard time of insertto
• Remarkable feed marks• Feed per revolution to be set within fl atland width • Use wiper insert type cutter such as T/EAW13J Drilling
• Use cutter exclusively for fi nishing
• Unstable clamping of workpiece• Check clamping method of workpiecetem
• Cutting of welded construction of thin steel plate• Use cutter of large rake angle and small corner angleK ing Sys
Chattering• Excessive cutting condition• Re-examine allowable chip removal rate according to motor HPTool
• Face milling of narrow width workpiece• Use cutter of small cutter diameter and with many teethde
•Too many simultaneous cutting teeth engagement• Reduce No. of teethL User's Gui

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