PCB鉆頭及鉆孔相關(guān)知識詳細(xì)

1、鉆頭及鉆孔相關(guān)知識培訓(xùn)2005年9月13日我司鉆頭材料的特點(diǎn)：直徑1.6mm： 鉆頭本體 與把柄采用整體式，本體與把柄材料均為碳化鎢。UC型因減少和基板接觸的面積所以可提昇孔壁品質(zhì)ST型基本上再研磨次數(shù)比UC型多ST型和UC型的形狀 (優(yōu)點(diǎn))UC型ST型ST型和UC型的形狀 結(jié)構(gòu)不同點(diǎn)：0.40.8mmUC型的設(shè)計(jì)優(yōu)勢 ST/STX的設(shè)計(jì)優(yōu)勢 高質(zhì)量的鉆孔品質(zhì)，低的鉆孔溫度，低的釘頭、膠渣、折斷率現(xiàn)象。操作簡單，直徑控制容易，較多的研磨次數(shù) 低的折損率，減少了鉆孔扭矩阻力。 較大的使用范圍，使用于一般用途 利于微鉆和6層以上的PCB板。 利于一般直徑鉆頭和雙面板及6層以下多面板。 ST型和UC

2、型的形狀 Amount of Re-point（0.06mm0.1mm/次）刃帶至少剩余0.2mm 以上ST型UC型的發(fā)熱溫度CONDITIONSPWB:FR-4 (L) t1.6mm x 3sDrill:ST30 0.4x6.5UC30 0.4x6.5N:70kRPMF:2.1m/minE/B:0.15 AluminumB/B:1.5mm Paper phenolNumber of Hits: 5,000Drilling Machine: Hitachi ND-2D14Union Tool 鉆頭的優(yōu)點(diǎn)：Union Tool 鉆頭的分類：UC型ST型ST30: 30度螺旋角ST型ST35: 3

3、5度螺旋角ST型STX: 變形ST型SV: 兩段倒錐ST型，UC35: 35度螺旋角UC型UM: 多層板UC型UV: 兩段倒錐UC型SX: 槽孔用鉆刀，UC結(jié)構(gòu)Union Tool 鉆頭的分類：ID型MD型MD: 微鉆(直徑0.3),ST結(jié)構(gòu)MC: 微鉆(直徑0.3),UC結(jié)構(gòu)MCV:兩段倒錐微鉆(直徑0.3)ID30: 30度螺旋角大鉆ID30C: 帶斷屑槽大鉆鉆頭的基本參數(shù)：全長本體長溝長把柄直徑Under cue 直徑直徑鉆尖角鉆頭的基本參數(shù)：間隙鉆芯厚度螺旋角刃帶長刃帶寬第一面角第二面角芯厚設(shè)計(jì)的差異性0.07mm0.11mmDrill Type：UCf0.3 x 5Web Taper

4、：0.028 /mmFlute Land Ratio：2.2Helix Angle：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(shè)計(jì)的差異性Drill Type：STf0.3 x 5Web Thickness：0.1mmFlute Land Ratio：2.0Helix Angle：40Web Taper = 0.010/mmWeb Taper = 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(shè)計(jì)的差異性Drill Type：UCf0.3 x 5Web Thickness：0.11mmWeb Taper : 0.028 /mmHelix Ang

5、le：35F / L Ratio = 1.5F / L Ratio = 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(shè)計(jì)的差異性Drill Type：UCf0.3 x 5Web Thickness：0.11mmWeb Taper:0.028 /mmFlute Land Ratio:2.2Helix Angle = 30Helix Angle = 40切粉排出悪化切粉排出良好鑽孔加工的切削條件主軸転數(shù)N:RPM進(jìn)刀速度F: （回刀速度RTR:）1m/min=16.7mm/sec =39.4IPMChip Loadf: F/N1000 mm/rev.撃孔

6、數(shù)等NFRTR理論切削條件 FR-4DSV=200m/min FR-4MLBV=180m/minV=pDN/1000V:周速(m/min)p :圓周率D:鑽頭外徑(mm)N:主軸転數(shù)(RPM)理論主軸転數(shù)高速加工的優(yōu)點(diǎn)相同之Chip Load, 不同転速的品質(zhì)傾向高速加工的優(yōu)點(diǎn)相同之Chip Load, 孔位精度的差異CONDITIONSPWB:FR-4(DS) 0.6mm x 2sChipload:15mm/rev.E/B:0.15mm AluminumB/B:1.5mm Paper phenolNumber of Hits: 3,000Number of Samples: 2高速加工的優(yōu)點(diǎn)

7、相同之Chip Load, 加工時間的差異 Condition Drill Dia:f0.4mm Chipload:25mm/rev. Fixed No. of hits:3,000 Hit Method:Randomized100% (2481sec)32% Time Reduction68% (1696sec)20 krpm 40krpm 60 krpm 80krpm 100 krpm63m/min 126m/min 188m/min 251m/min 314m/min適當(dāng)轉(zhuǎn)速的選定：不能太高或太低適當(dāng)進(jìn)刀的選定： 不能太大或太小適當(dāng)進(jìn)刀的選定：不能太大磨耗量: 鉆頭磨耗與PCB層數(shù)的關(guān)系

8、下墊板的穿透量穿透量（DEPTH)穿透部(L1)鑽頭前端長度（L2)DRILL DIA fDL2BOTTOM PCBBACKERL1POINT ANGLE a（先端角為130）影響鑽頭品質(zhì)的各主要因素Future DrillingDrill BitTable SpeedDrilling MachineRepointing SpindlePositioning AccuracyVibrationCarbide MaterialRepointingGeometry DesignDrilling ConditionMaterial Preparation ParameterRingPrecision

9、PC BoardEntry&BackerMaterialHardnessNestingSurfaceRoughnessDrill PenetrationControlThrustWorking Environmentf 0.1-0.25mmin ProductionFlute Finish VacuumBush Pressure ForcePCBSet upGlass FiberCopper RatioThickness Resin ContentPropertiesNoise4M ThinkingOperatorSkillExternal VibrationBasementDrilling対

10、鑽孔品質(zhì)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(Drilling Deflection)関連項(xiàng)目鑽頭剛性適當(dāng)?shù)漠挵鍞?shù)主軸Run-out管理適當(dāng)?shù)腅ntry Board的使用鑽孔機(jī)的機(jī)床精度孔位精度(Shift)関連項(xiàng)目定位PIN不適當(dāng)鑽孔機(jī)的機(jī)床移位內(nèi)層移位孔位精度鑽頭形狀（剛性関連）芯厚（Web）芯厚倒錐（Web Taper）溝巾比溝長（Body Length）鑽頭形狀（形狀関連）鑽尖角螺旋角UNION TOOL CO. TECHNICAL RESEARCH內(nèi)壁粗度影響電鍍後電気導(dǎo)通的信頼性対內(nèi)層絶縁的信頼性UNION TOOL CO. TECHNICAL RESEA

11、RCH內(nèi)壁粗糙度鑽頭形狀（溝槽形狀関連）芯厚（Web）芯厚倒錐（Web Taper）溝巾比溝長（Body Length）鑽頭形狀（形狀関連）螺旋角UNION TOOL CO. TECHNICAL RESEARCH內(nèi)壁粗糙度提昇粉屑的排出性降低孔壁粗度UNION TOOL CO. TECHNICAL RESEARCHDrill Type：UCf0.3 x 5Web Thickness：0.11mmWeb Taper:0.028 /mmFlute Land Ratio:2.2Helix Angle = 30Helix Angle = 40樹脂焦渣（Resin Smear)現(xiàn)象在鑽孔時因熱溶化的樹脂

12、、 付著在內(nèi)層銅箔上。造成電鍍不良UNION TOOL CO. TECHNICAL RESEARCH樹脂焦渣（Resin Smear)対策減少鑽頭與孔壁接觸的面積（使用UC型）加快進(jìn)刀速撃孔數(shù)、畳板數(shù)重新検討実施去焦渣工程UNION TOOL CO. TECHNICAL RESEARCH釘頭現(xiàn)象鑽孔時內(nèi)層銅箔不能被順利切削、反而受到拉力延展変形為像釘子頭部形狀。UNION TOOL CO. TECHNICAL RESEARCHST type釘頭対策減少鑽頭與孔壁接觸的面積（使用UC型）加快進(jìn)刀速撃孔數(shù)、畳板數(shù)重新検討UNION TOOL CO. TECHNICAL RESEARCHUC typ

13、e耐折損性対策増加鑽頭的剛性改善超硬材料UNION TOOL CO. TECHNICAL RESEARCHCONDITIONSPWB:BT RESIN (DS) 0.4mm x 3sDrill:0.15x2.5N:160kRPMF:4.8m/minE/B:LE400B/B:1.5mm Paper phenolNumber of Hits: 3,000Drilling Machine: Hitachi ND-1W212Quality Limit鑽頭的摩耗新型材料摩耗特性UNION TOOL CO. TECHNICAL RESEARCHCONDITIONSPWB:FR-4 (8L) 0.8mm x

14、 2sDrill:NH20 0.3x5N:80kRPMF:1.8m/min E/B:LE400B/B:1.5mm Paper phenolNumber of Hits: 3,000基板朝向高功能高品質(zhì)UNION TOOL CO. TECHNICAL RESEARCH人HANDLING基板材料機(jī)械鑽頭作業(yè)環(huán)境綜合的改善鉆頭檢驗(yàn)項(xiàng)目及公差重疊、分開重疊（Overlap)分開（Gap)尺寸顯微鏡倍數(shù)公差范圍尺寸顯微鏡倍數(shù)公差范圍D0.340倍0.0 0 5以下D0.340倍0.0 0 5以下0.3D0.630倍0.0 0 5以下0.3D0.630倍0.0 0 5以下0.6D1.6520倍0.01D以

15、下0.6D1.6520倍0.01D以下1.65D3.17510倍0.01D以下1.65D3.17510倍0.015D以下D3.17510倍0.015D以下單面大頭、單面小頭單面大頭（Primary Flare)單面小頭（Primary Taper)尺寸顯微鏡倍數(shù)公差范圍尺寸顯微鏡倍數(shù)公差范圍D0.340倍0.0 0 5以下 D0.340倍0.0 0 5以下 0.3D0.630倍0.015D以下0.3D0.630倍0.015D以下0.6D1.6520倍0.015D以下0.6D1.6520倍0.015D以下1.65D3.17510倍0.015D以下1.65D3.17510倍0.02D以下D3.17

16、510倍0.01D以下刀刃內(nèi)?。↙ayback)刀刃外?。℉ook)尺寸顯微鏡倍數(shù)公差范圍尺寸顯微鏡倍數(shù)公差范圍D0.340倍0.0 0 5以下D0.340倍0.0 0 5以下0.3D0.630倍0.0 0 5以下0.3D0.630倍0.0 0 5以下0.6D1.6520倍0.01D以下0.6D1.6520倍0.01D以下1.65D3.17510倍0.01D以下1.65D3.17510倍0.015D以下D3.17510倍0.015D以下內(nèi)弧、外弧大小面、偏心b偏心（Chisel point Inconcentricity)尺寸顯微鏡倍數(shù)公差范圍尺寸顯微鏡倍數(shù)公差范圍D0.340倍a b 0.8

17、aD0.340倍0.005以下0.3D0.630倍0.3D0.630倍0.01以下0.6D1.6520倍0.6D1.6520倍1.65D3.17510倍1.65D3.17510倍|a-b|3.17510倍0.02以下大小面（Offset)缺口（Chipping)尺寸顯微鏡倍數(shù)公差范圍D0.340倍0.0 0 3以下0.3D0.630倍0.0 0 4以下0.6D1.6520倍0.0 0 5以下1.65D3.17510倍0.0 0 8以下大小面、偏心實(shí)體顯微鏡：利用光學(xué)放大原理，放大鉆頭 進(jìn)行刀面檢驗(yàn)。根據(jù)不同鉆頭 直徑，調(diào)整放大倍率。工具顯微鏡：利用光學(xué)放大原理，放大鉆頭 進(jìn)行刀面檢驗(yàn)及測量，可

18、測量 出刀面的具體數(shù)值，對比檢驗(yàn) 標(biāo)準(zhǔn)，對鉆頭刀面進(jìn)行判斷。檢驗(yàn)工具Impact on Registration AccuracyChisel pointinconcentricityHeavyOverlapMediumGapMediumImpact on Registration AccuracyPrimary flairLightNegativeLight刀面不良對于鉆孔的影響010203040506070809010011012001020304050Chisel point inconcentricity (mm)Hole registration accuracy (mm)Botto

19、m-BackTop-FrontMAXAVE+3sMAXAVE+3sChisel point inconcentricityImpact on Registration Accuracy: HeavyDRILL: UC 0.3 x 5 mmPWB: FR-4 4Layers t1.6 x 2sEB: Al t0.15 B/B：Bakelite t1.5 mmN: 80 krpm (V: 75.4m/min)F: 2.0 m/min (f: 25 mm/rev) Hit count: 3000 hitsImagination of Chisel point inconcentricity01020

20、3040506070809010011012001020304050Imagination of OverlapMAXAVE+3sMAXAVE+3sBottom-BackTop-FrontImpact on Registration Accuracy: MediumOverlapDRILL: UC 0.3 x 5 mmPWB: FR-4 4Layers t1.6 x 2sEB: Al t0.15 B/B：Bakelite t1.5 mmN: 80 krpm (V: 75.4m/min)F: 2.0 m/min (f: 25 mm/rev) Hit count: 3000 hitsOverlap

21、 (mm)Hole registration accuracy (mm)010203040506070809010011012001020304050Bottom-BackTop-FrontMAXAVE+3sMAXAVE+3sGapDRILL: UC 0.3 x 5 mmPWB: FR-4 4Layers t1.6 x 2sEB: Al t0.15 B/B：Bakelite t1.5 mmN: 80 krpm (V: 75.4m/min)F: 2.0 m/min (f: 25 mm/rev) Hit count: 3000 hitsGap (mm)Hole registration accur

22、acy (mm)Imagination of GapImpact on Registration Accuracy: Medium010203040506070809010011012001020304050Bottom-BackTop-FrontMAXAVE+3sMAXAVE+3sImpact on Registration Accuracy: LightPrimary flairDRILL: UC 0.3 x 5 mmPWB: FR-4 4Layers t1.6 x 2sEB: Al t0.15 B/B：Bakelite t1.5 mmN: 80 krpm (V: 75.4m/min)F: 2.0 m/min (f: 25 mm/rev) Hit count: 3000 hitsPrimary flair (mm)Hole registration accuracy (mm)Imagination of Primary flair010203040506070809010011012001020304050Bottom-BackTop-FrontMAXAVE+3sMAXAVE+3sImpact on Registration Accuracy: Lig