Общий каталог Tungaloy 2020 - 2021 - страница 1651

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GradeInsertExt. ToolholderInt. ToolholderThreadingGroovingMiniature toolMilling cutterEndmillDrilling toolTooling SystemUser's GuideIndex User’s Guide - Technical Reference A Milling tools Tr o u b l e shooting in face milling B Trouble Possible causes Countermeasures • Improper insert grade selectionRapid wear of(Insufficient wear resistance)cutting edge• Excessive cutting speed• Inadequate feed• Use a grade with high wear resistance P30 /P20• Select cutting speed suited for Workpiece material and insert grade• Use standard cutting condition in catalog as guideC • Improper Insert grade selection (Insufficient toughness) • Use a grade with high fracture resistance P10 / P20 • Cutting hard material and • Decrease cutting speed unfavorable surface conditionRapid chipping ofcutting edge• Excessive feed• Use cutter with strong cutting edge• Proper selection of feed conditions, using recommended cutting conditions in catalog as guideD • Excessive pressure applied on cutting edge • Proper selection of engaging angle • Machining superalloys • Use a negative-positive type cutter with large corner angle • Cracking due to thermal shock • Select insert grade of stronger thermal shock resistance• Decrease cutting speed E • Continuous use of excessively worn insert • Shorten replacement standard time of insert • Cutting hard material • Use cutter with stronger cutting edge • Use cutter of larger corner angleFracturing• Obstruction to chip flow• Use cutter with better chip expulsion F • Recutting of chips after chip welding • Select insert grades difficult for chips to adhere Cemented carbides / cermets, coated grades • Use air blow• Excessively slow cutting, too fine feed• Select cutting speed and feed optimized for insert grade andWorkpiece materialG • Cutting soft material such as aluminium, copper, mild steel • Use cutter with large rake angle Excessive chip • Cutting stainless steel • Coated grades (AH130､AH3135)welding or build-up• Use of cutter with negative rake• Use cutter with large rake angleon cutting edgeor too small rake angleH • Effect of built-up edge • Increase cutting speed • Appropriate cutting depth (finish allowance) • Effect of face cutting edge run out • Change insert grade For steels : P/ coated / cermetFor cast irons :K/coated• Proper installing of insertsI Rough finish • Use insert of high dimensional accuracy • Cleaning of insert pocket • Continuous use of excessively worn insert • Shorten replacement standard time of insert• Remarkable feed marks• Feed per revolution to be set within flatland widthJ • Use wiper insert type cutter such as T/EAW13 • Use cutter exclusively for finishing • Unstable clamping of workpiece • Check clamping method of workpiece• Cutting of welded construction of• Use cutter of large rake angle and small corner anglethin steel plateK Chattering • Excessive cutting condition • Re-examine allowable chip removal rate according to motor HP • Face milling of narrow width workpiece • Use cutter of small cutter diameter and with many teeth • Too many simultaneous cutting teeth engagement • Reduce No. of teeth L M Tungaloy L063