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1、FASCON FASCON Screw threads and tolerances 扣件之螺紋精度等級與尺寸公差(複習與演算複習與演算)By: Steven Fang .tw2003/08/11 FASCON FASCON 先學會計算三角形面積先學會計算三角形面積S S 對邊對邊e e 對角對角302/2/ 3S3SS = 1S = 11/1/ 3S3SA AB BC C三角形三角形ABCABC面積面積= (1 /3S X S)= (1 /3S X S)=1 /23 S=1 /23 S2 2FASCON FASCON 計算六角形面積公式計算六角形面積公式30A AB BC C六角形面積六角形
2、面積六角形面積六角形面積= 1 /23 S= 1 /23 S2 2 X 3 X 3= 3/2 S= 3/2 S2 2 = = 0.866025 S0.866025 S2 2三角形三角形ABCABC面積面積= (1 /3S X S)= (1 /3S X S)=1 /23 S=1 /23 S2 2FASCON FASCON Nut thread螺紋有效徑計算螺紋有效徑計算Pitch Dia. = D - 2 X 3/8H Pitch Dia. = D - 2 X 3/8H = D - 3/4 X 0.866025P = D - 3/4 X 0.866025P = = D - 0.649519PD
3、- 0.649519P Bolt thread60o螺距螺距 p有有效效徑徑陽陽螺螺紋紋大大徑徑(螺螺絲絲外外徑徑)陰陰螺螺紋紋小小徑徑( (螺螺帽帽孔孔徑徑) )1/4 H1/8 H HH = 0.866025 PH = 0.866025 PMajor Dia.Pitch Dia.Minor Dia.1/2 H3/8H3/8HFASCON FASCON Basic thread profile - MetricNut threadBasic Profile (Zero Line) Bolt thread螺紋公差螺紋公差ToleranceNutBolt60oFASCON FASCON 學會計算
4、基本螺紋尺寸學會計算基本螺紋尺寸(I)M6 X 1.0 - 6H basic Pitch Diameter, Minor DiameterM6 X 1.0 - 6g 之之 Pitch Diameter, Major DiameterBasic Pitch Dia. = D - 2 X 3/8H = D - 3/4 X 0.866025P = D - 0.649519P = 6 - 0.649519 X 1.0 = 5.350Basic Minor Dia. = D - 2 X 5/8H = D - 5/4 X 0.866025P = D - 1.083P = 6 - 1.083 X 1.0 =
5、 4.917Basic Pitch Dia. = D - 2 X 3/8H = D - 3/4 X 0.866025P = D - 0.649519P = 6 - 0.649519 X 1.0 = 5.350g = - 26u 5.350 0.026 = 5.3246級級 1.0 bolt PD tolerance = 112u 5.324 0.112 = 5.212g = - 26u 6.000 0.026 = 5.9746級級 1.0 bolt MD tolerance = 180u 5.974 0.180 = 5.794FASCON FASCON 學會計算基本螺紋尺寸學會計算基本螺紋尺寸
6、(II)M6 X 0.75 6e之之 Pitch Diameter, Major DiameterM6 X 0.75 - 6g 之之 Pitch Diameter, Major DiameterBasic Pitch Dia. = D - 2 X 3/8H = D - 3/4 X 0.866025P = D - 0.649519P = 6 - 0.649519 X 0.75 = 5.513Basic Pitch Dia. = D - 2 X 3/8H = D - 3/4 X 0.866025P = D - 0.649519P = 6 - 0.649519 X 0.75 = 5.513g = -
7、 22u 5.513 0.022 = 5.4916級級 0.75 bolt PD tolerance = 100u 5.491 0.100 = 5.391e = - 56u 6.000 0.056 = 5.9446級級 0.75 bolt MD tolerance = 140u 5.944 0.140 = 5.804e = - 56u 5.513 0.056 = 5.4576級級 0.75 bolt PD tolerance = 100u 5.457 0.100 = 5.357g = - 22u 6.000 0.022 = 5.9786級級 0.75 bolt MD tolerance = 1
8、40u 5.978 0.140 = 5.837FASCON FASCON Thread tolerance position-Metric5H7H6HZero Line 基準線（零線）基準線（零線）4h6g8g電鍍餘隙電鍍餘隙 AllowancegfNut threadBolt threade6eM6 X 0.75-22-38-56FASCON FASCON Technical dataFASCON FASCON Fasteners tolerances ISO4759 FASCON FASCON ISO tolerancesFASCON FASCON Tolerancesh14h13h13+
9、2Pjs15js14Example: Size M6 X 25FASCON FASCON Hexagon nuts weight calculationS S 對邊對邊mm厚厚厚厚度度度度六角螺帽重量六角螺帽重量 g/pc= (六角面積六角面積 - 圓面積圓面積) X 厚度厚度 X 7.85g/1,000圓面積圓面積 = /4 X Pitch Dia.2FASCON FASCON DIN ISO 2768-1Tolerance- Class(Line measurement)Limits in mm for nominal sizes in mm0,5to3above3 to 6above6t
10、o30above30to120above120to400above400to1000above1000to2000above2000to4000f (fine) 0,05 0,05 0,1 0,15 0,2 0,3 0,5-m (medium) 0,1 0,1 0,2 0,3 0,5 0,8 1,2 2c (coarse) 0,15 0,2 0,5 0,8 1,2 2 3 4v (very coarse)- 0,5 1 1,5 2,5 4 6 8ToleranceClass(radius and chamfer) Limits in mm for nominal sizes in mm0,5t
11、o3above3to6above6f (finne) 0,2 0,5 1m (medium)c (coarse) 0,4 1 2v (very coarse)FASCON FASCON DIN ISO 7168Tolerance Class0.5to3Over3To6Over6To30Over 30To120Over120To400Over400To1000Over1000To2000Over2000To4000F (fine) 0,05 0,05 0,1 0,15 0,2 0,3 0,5 0,8M (means) 0,1 0,1 0,2 0,3 0,5 0,8 1,2 2,0G (rough
12、ly) 0,15 0,2 0,5 0,8 1,2 2,0 3,0 4,0Sg (very rough)- 0,5 1,0 1,5 2,0 3,0 4,0 6,0FASCON FASCON 表面粗度表面粗度 Surface roughnessFASCON FASCON Wind turbine/windmill/wind powerFASCON FASCON Wind turbine/wind mill/wind powerBONUS Energy A/S NEG Micon A/SNordex A/SVestas Wind Systems A/S LM Glasfiber A/SInfra-vest 英華威英華威 ?
