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钻头及钻孔相关知识培训2005年9月13日我司钻头材料的特点:■直径1.6mm:钻头本体与把柄采用两段镶嵌式,本体材料为碳化钨,把柄采用不锈钢■直径1.6mm:钻头本体与把柄采用整体式,本体与把柄材料均为碳化钨。■UC型因減少和基板接触的面積所以可提昇孔壁品質■ST型基本上再研磨次数比UC型多ST型和UC型的形状(优点)■UC型■ST型ST型和UC型的形状结构不同点:0.4~0.8mmUC型的设计优势ST/STX的设计优势高质量的钻孔品质,低的钻孔温度,低的钉头、胶渣、折断率现象。操作简单,直径控制容易,较多的研磨次数低的折损率,减少了钻孔扭矩阻力。较大的使用范围,使用于一般用途利于微钻和6层以上的PCB板。利于一般直径钻头和双面板及6层以下多面板。ST型和UC型的形状AmountofRe-point(0.06mm~0.1mm/次)刃带至少剩余0.2mm以上ST型UC型的发热温度0255075100010002000300040005000NumberofHits(DrillingTemp-RoomTemp)STUCCONDITIONSPWB:FR-4(4L)t1.6mmx3sDrill:ST300.4x6.5UC300.4x6.5N:70kRPMF:2.1m/minE/B:0.15AluminumB/B:1.5mmPaperphenolNumberofHits:5,000DrillingMachine:HitachiND-2D14UnionTool钻头的优点:UnionTool钻头的分类:■UC型■ST型ST30:30度螺旋角ST型ST35:35度螺旋角ST型STX:变形ST型SV:两段倒锥ST型,UC35:35度螺旋角UC型UM:多层板UC型UV:两段倒锥UC型SX:槽孔用钻刀,UC结构UnionTool钻头的分类:■ID型■MD型MD:微钻(直径0.3),ST结构MC:微钻(直径0.3),UC结构MCV:两段倒锥微钻(直径0.3)ID30:30度螺旋角大钻ID30C:带断屑槽大钻钻头的基本参数:全长本体长沟长把柄直径Undercue直径直径钻尖角钻头的基本参数:间隙钻芯厚度螺旋角刃带长刃带宽第一面角第二面角芯厚設計的差異性MARGINFLUTEENDW=0.07mmWTOPW=0.11mmDrillType:UCf0.3x5WebTaper:0.028/mmFluteLandRatio:2.2HelixAngle:38°孔位精度⇒悪化、切粉排出⇒良好孔位精度⇒良好、切粉排出⇒悪化芯厚倒錐設計的差異性DrillType:STf0.3x5WebThickness:0.1mmFluteLandRatio:2.0HelixAngle:40°WebTaper=0.010/mmWebTaper=0.030/mm孔位精度⇒悪化、切粉排出⇒良好孔位精度⇒良好、切粉排出⇒悪化溝巾比設計的差異性DrillType:UCf0.3x5WebThickness:0.11mmWebTaper:0.028/mmHelixAngle:35°F/LRatio=1.5F/LRatio=2.5LAND溝(FLUTE)孔位精度⇒良好、切粉排出⇒悪化孔位精度⇒悪化、切粉排出⇒良好螺旋角設計的差異性DrillType:UCf0.3x5WebThickness:0.11mmWebTaper:0.028/mmFluteLandRatio:2.2HelixAngle=30°HelixAngle=40°切粉排出⇒悪化切粉排出⇒良好鑽孔加工的切削条件■主軸転数N:RPM■進刀速度F:(回刀速度RTR:)1m/min=16.7mm/sec=39.4IPM■ChipLoadf:F/N・1000mm/rev.■撃孔数等NFRTR理論切削条件■FR-4DSV=200m/min■FR-4MLBV=180m/minV=pDN/1000V:周速(m/min)p:圆周率D:鑽頭外径(mm)N:主軸転数(RPM)理論主軸転数φ0.10φ0.15φ0.20φ0.25φ0.30φ0.35DS636,000424,000318,000255,000212,000182,000MLB573,000382,000286,000229,000191,000164,000(f)0.350.300.250.200.150.10100200300400500600700800(kRPM)限界 MAX160krpm高速加工的優点■相同之ChipLoad,不同転速的品質傾向-QualityLevel-80k120k160k200kHoleLocationGettingbetterHoleRoughnessStableNailHeadingStableSmearingDecreaseDrillwearingLesswearingEvaluation高速加工的優点■相同之ChipLoad,孔位精度的差異HoleAccuracy15202530354045505575k100k(47)120k(57)140k(66)160k(75)180k(85)SpindleSpeed(rpm)(Velocity(m/min))HoleAccuracy(mm)Ave.+3sDrillBit:MD350.15x2.5CONDITIONSPWB:FR-4(DS)0.6mmx2sChipload:15mm/rev.E/B:0.15mmAluminumB/B:1.5mmPaperphenolNumberofHits:3,000NumberofSamples:2高速加工的優点■相同之ChipLoad,加工時間的差異02040608010075k120k160k180k(RPM)(%)ConditionDrillDia:f0.4mmChipload:25mm/rev.FixedNo.ofhits:3,000HitMethod:Randomized100%(2481sec)32%TimeReduction68%(1696sec)Hole Registration Accuracy02040608010063m/min126m/min188m/min251m/min314m/min主軸runout:2μm~3μm(20krpm~160krpm)之後因鑽針崩角嚴重、加工中斷DRILL:UCφ1.0x8.0PWB:FR-4(DoubleSide)t1.6x3sE/B:ALt0.2 B/B:PaperCladt1.5Parameters:N=20~160krpm f=40μm/rev ConstantNumberof hits:2,000hitsn=3(轉速)高(轉速)低斷針(轉速)(周速)20krpm40krpm60krpm80krpm100krpm63m/min126m/min188m/min251m/min314m/min适当转速的选定:不能太高或太低HoleRegistrationAccuracy020406080100120HoleRegistrationAccuracy(μm)MAXAVE+3sAVE+3s AVEDRILL:UC 0.3x5 E7223支中斷2支12.5μm/rev1.25m/min17.5μm/rev1.75m/min22.5μm/rev2.25m/min(chipload) 大(chipload) 小PWB:BT(DoubleSide)t0.2x13sE/B:ALt0.15 B/B:PaperCladt1.5Parameters:N=100krpm Constant F=1.75m/min f=17.5μm/revNumberofhits:3,000n=3适当进刀的选定:不能太大或太小HoleWallRoughness051015202512.517.522.5HoleWallRoughness(μm)DRILL:UC 0.3x5 E722PWB:BT(DoubleSide)t0.2x13sE/B:ALt0.15 B/B:PaperCladt1.5Parameters:N=100krpmConstantNumberofhits:3,000hitsn=10(Measuring5holesonnearby3,000hits)12.5μm/rev1.25m/min17.5μm/rev1.75m/min22.5μm/rev2.25m/min(chipload) 大(chipload) 小(f)(F)‐●-AVE171317131713(PanelfromtheTop)HoleRegistrationAccuracy0204060801001201-10001001-20002001-3000NumberofhitsDRILL:UC 0.4x7 A382PWB:FR-4(4Layers)t1.6x3sE/B:ALt0.15 B/B:PaperCladt1.5Parameters:N=75krpm F=0.75m/min f=10μm/revNumberofhits:3,000hitsn=3○ AVE+3s-●- AVE+3sAVEHole Registration Accuracy(μm)适当进刀的选定:不能太大磨耗量:钻头磨耗与PCB层数的关系下墊板的穿透量■穿透量(DEPTH)=穿透部(L1)+鑽頭前端長度(L2)DRILLDIAfDL2BOTTOMPCBBACKERL1POINTANGLEaφDφ0.10φ0.20φ0.30φ0.40φ0.50φ0.60L10.30.30.30.30.30.3L20.0230.0470.0700.0930.1160.140DEPTH(mm)0.3230.3470.3700.3930.4160.440(先端角為130°)影響鑽頭品質的各主要因素FutureDrillingDrillBitTableSpeedDrillingMachineRepointingSpindlePositioningAccuracyVibrationCarbideMaterialRepointingGeometryDesignDrillingConditionMaterialPreparationParameterRingPrecisionPCBoardEntry&BackerMaterialHardnessNestingSurfaceRoughnessDrillPenetrationControlThrustWorkingEnvironmentf0.1-0.25mminProductionFluteFinishVacuumBushPressureForcePCBSetupGlassFiberCopperRatioThicknessResinContentPropertiesNoise4MThinkingOperatorSkillExternalVibrationBasementDrilling対鑽孔品質的要求■孔位精度■孔壁粗度■焦渣■釘頭■耐折損性■毛辺■排屑性及其他孔位精度(DrillingDeflection)■関連項目鑽頭剛性適当的畳板数主軸Run-out管理適当的EntryBoard的使用鑽孔機的機床精度孔位精度(Shift)■関連項目定位PIN不適当鑽孔機的機床移位内層移位孔位精度■鑽頭形状(剛性関連)芯厚(Web)芯厚倒錐(WebTaper)溝巾比溝長(BodyLength)■鑽頭形状(形状関連)鑽尖角螺旋角UNIONTOOLCO.TECHNICALRESEARCH内壁粗度■影響電鍍後電気導通的信頼性対内層絶縁的信頼性UNIONTOOLCO.TECHNICALRESEARCH内壁粗糙度■鑽頭形状(溝槽形状関連)芯厚(Web)芯厚倒錐(WebTaper)溝巾比溝長(BodyLength)■鑽頭形状(形状関連)螺旋角UNIONTOOLCO.TECHNICALRESEARCH内壁粗糙度■提昇粉屑
本文标题:70PCB钻头及钻孔相关知识
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