钻头培训TDM drill training.ppt

drilling basicnomeclaturerotatingtools trainingforsalesengineer haraldpreusser twistdrillmadebyp cook 1770 40 ofallmetalcuttingoperationsaredrillingoperations40 的金属切削操作是钻削作业 drivemovements backtaper webtaper plaincylindrical morsetaper standardshank differentdrillshanks clearanceangle 10 ofdiameter formawebthinning formb formcsplitpoint formdcastiron formecentrepoint e k formu formu formuv drillpoints 整体硬质合金钻头刃口结构 regroundto140 pointanglenormal118 regroundto90 maincuttingedgedesignforregroundtwistdrills typngeneralpurpose typhbrittlematerials typwsoftmaterials basicdrilltypes profileofatwistdrill flutegeometry fluteprofiles graphforpeckingcycles drillingwithbushings d2 d1 0 5 1 d1 90 130 stepdrillformachiningwithminimumburrformation 60 70 30 40 axialforces theinfluenceoftip angleonthecuttingforces thedrillingprocess fluteformandrake basiccuttingtoolgeometry neg corr pos hardmaterials heattreatedmaterials softmaterials hardmaterials rakeangle insufficientclearancecausesthedrilltorubbehindthecuttingedge itwillmakethedrillworkhard generateheatandincreaseaxialthrust resultsinpoorholequalityanddrillbreakage excessiveclearanceresultsinlackofsupportbehindcuttingedgewithquickdullingandpoortoollifedespiteinitialfreecuttingaction clearanceanglebehindcuttingtipforgeneralpurposesis8 12 average influenceofclearanceonperformance metal composites non metallics materials structuralsteels constructionalsteels highgradesteels unalloyedcon structionalsteelsgeneralstructuralsteelswithrm0 55 corrm 700n mm2 102 000psi alloyedsteel unalloyedhighgradesteelsstructuralsteelswith 0 5 ctoolsteels1 to3 gradealloyedhighgradesteelsstructuralsteels wear resistantandbearingsteelstoolsteels hsscorrosionresistantsteels stainlessandheat resistingsteels steelgrades corrosion andacidproofsteels heat treatablesteels structuralcomponentsofhighstress springsteels highelasticityspringsandcomponents wearresistantsteels earth movingequipment armourplate toolsteels cutting punch die andformingtools superalloys turbines nuclearpowerplants military medical titaniumalloys aircraft andspaceindustry motors medical dental specialalloys i e bronzed andlightmetalalloysofhightoughness specialpurposes specialmaterialsandtheirapplication spectrumofmaterials b9 091 e ppt 50454035302520151050 0150300450600750900105012001350150017001850 tensilestrengthrm n mm2 elongationa5 alsi castiron gg ggg steelsupto1000n mm2 steelsupto700n mm2 hightensilesteels clearancewear landwear craterwear metal cuttingconditionsareok formsofwear feedexcessive进给太大 chiseledgedeformed横刃的变形 formsofwear cuttingspeedtoohigh切削速度太高 extremelandwear burntcuttingedges formsofwear excessivefeedorincorrectdrillgeometry build upedges pushedswarf formsofwear possiblecauses feedratetoohightoolispushingnotcuttingspindlespeedistoolowpossiblesolutions decreasefeedratedecreasehonewidthincreaserpm troubleshooting chiseledgewear b8 224 e ppt crateringoncuttingedge possiblecauses feedratetoohighliprelieftoolargeimproperornocoatingspindletooslowpossiblesolutions decreasefeedratedecreaseclearanceangleselectpropercoatingincreaserpm troubleshooting cuttingedgecratering b8 225 e ppt possiblecauses insufficientbacktapertoolrun outpossiblesolutions increasebacktaperchecktoolset upforrun out troubleshooting marginwear b8 226 e ppt possiblecauses spindlespeedtoslowhonewidthtolargepossiblesolutions increaserpmdecreasehonewidth troubleshooting cuttingedgebuildup b8 227 e ppt wear cause b8 228 e ppt wear cause b8 229 e ppt diametermaterialdrillingdepthtooltype recommendedcuttingdatafordrilling oilfeed internalcoolantsupply megajetvs twistdrillwithexternalcoolant typeofhole throughholediameter 12 2mm 48 depth 30mm 1 18 material 1 2713 55nicrmov6v toolsteell6 rm 970n mm2 141 000psi coolantpressure 10bar 142psi vc 37m min sfm122 f 0 2mm rev 0078inch rev vc 42m min sfm138 f 0 3mm rev 0118inch rev 0200400 0 7 87 15 78 twistdrilldin1897tin coated a6292tinmegajet 60 197 50 164 40 131 30 98 20 66 10 33 0 toollife m feet 0200400 0 7 87 15 78 feedrate mm min ipm casestudy 500450400350300250200150100500 numberofdrilledholes maximumaverageminimum cuttingtestdatacomparisonofground rolledversions alphaseries solidcarbidehigh performance drillwithspecialflute andtip geometryfordrillingofsteel 140 1 tipgeometryofsolidcarbidehigh performance drillalpha2 4 ofdifferentshortholedrillingtoolsdia 12mminmaterial31nicr14rm 970n mm2 tensilestrength 280hb 600500400300200100 feedratesmm min toola1211a1148a1149tina1166a1164 vm min2025359090 fmm rev0 20 250 30 20 25 typicalfeedrates solidcarbidedrillalphajet 115 carbidetippedtwistdrilldin8037 3 flute solidcarbidehigh performance drillswithspecialtipgeometry oaltodin1897or6537l k2167k30fk2167k30f k30fk30f din1897 din1897 castironmaterials al alloyssteels stepdrills a1166k30fa1166k30fa1166tina1167aa1167ba1168a3967 k30fk30fk30fk30fk30fk30fk30f tin din1897 din1897 din1897 din1897 din1897 din1897 din6537l titanium niandcobasedsuperalloysste