螺纹精度等级与尺寸公差.ppt

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 sfang@.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= ½(1 /√3S X S)= ½(1 /√3S X S)=1 /2√3 S=1 /2√3 S2 2FASCON FASCON 計算六角形面積公式計算六角形面積公式30A AB BC C六角形面積六角形面積六角形面積六角形面積= 1 /2√3 S= 1 /2√3 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= ½(1 /√3S X S)= ½(1 /√3S X S)=1 /2√3 S=1 /2√3 S2 2FASCON 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 - 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 H{3/8H3/8HFASCON FASCON Basic thread profile - MetricNut threadBasic Profile (Zero Line) Bolt thread螺紋公差螺紋公差ToleranceNutBolt60oFASCON FASCON 學會計算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 = 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 = 5.794FASCON FASCON 學會計算基本螺紋尺寸學會計算基本螺紋尺寸(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 = - 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 = 140u 5.978 – 0.140 = 5.837FASCON 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 0.75-22-38-56FASCON FASCON Technical dataFASCON FASCON Fasteners tolerances ISO4759 FASCON FASCON ISO tolerancesFASCON FASCON Tolerancesh14h13h13+2Pjs15js14Example: Size M6 X 25FASCON 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 = π/4 X Pitch Dia.2FASCON FASCON DIN ISO 2768-1Tolerance- Class(Line measurement)Limits in mm for nominal sizes in mm0,5to3above3 to 6above6to30above30to120above120to400above400to1000above1000to2000above2000to4000f (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 mm0,5to3above3to6above6f (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 (roughly)± 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± 6,0FASCON FASCON 表面粗度表面粗度 Surface roughnessFASCON FASCON Wind turbine/windmill/wind powerFASCON 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 ???。