1、管理資源吧（），提供海量管理資料免費下載！目錄修訂履歷31. 介紹41.1 目的41.2 範圍42.螺牙82.1 定義62.2 分類82.3精度等級82.4 螺紋標注92.5 基本尺寸103. 鋁合金103.1 鋁合金成分104.公差124.1 ISO124.2 JIS124.3 DIN124.4 GB145 參考文件15修訂履歷All documents MUST contain the Revision History table labeled as paragraph 1. There will not be any entries in the table for an initia

2、l release document. For a revision to the document, complete the Revision History entries. Summarize the Revision Description and keep it as clear and concise as possible and ensure that the table only occupies 1 page after the template instructions are hidden. Obtain the initials of the approval au

3、thorities along with the date. Normally, approvals for revisions should be the same individuals that approved the documents initial release. Please wrap multiple revision approval initials keeping them within the boundary lines for the row of the revision being approved.6/8/016/11/011. 介紹1.1 目的定義產品的

4、外觀信息,包括:裝配的公差,特殊的外觀要求以及在允許范圍內的和通用標準的偏差。1.2 范圍適用于公司所生產的所有壓鑄件產品，客戶特別規定的除外。2. 螺牙2.1 定義螺紋：在圓柱或圓錐表面上,沿著螺旋線所形成的具有規定牙形的連續凸起。內螺紋：在圓柱或圓錐內表面上所形成的螺紋。外螺紋：在圓柱或圓錐外表面上所形成的螺紋。有效螺紋：由完整螺紋和不完整螺紋組成的螺紋，不包括螺尾。公稱直徑：代表螺紋尺寸的直徑。大徑：與外螺紋牙頂或內螺紋牙底相切的假想圓柱或圓錐的直徑。用d（外螺紋）或D（內螺紋）表示。中徑：一個假想圓柱或圓錐的直徑，該圓柱或圓錐的母線通過牙形上溝槽和凸起寬度相等的地方。該假想圓柱或圓錐稱

5、為中徑圓柱或中徑圓錐。中徑用d2（外螺紋）或D2（內螺紋）表示。小徑：與外螺紋牙底或內螺紋牙頂相切的假想圓柱或圓錐的直徑。用d1（外螺紋）或D1（內螺紋）表示。螺距：相鄰兩牙在中徑線上對應兩點間的軸向距離。螺紋精度：由螺紋公差帶和旋合長度共同組成的衡量螺紋質量的綜合指標。旋向：螺紋有右旋和左旋兩種。內外螺紋旋合時，順時針旋入的為右旋，逆時針旋入的為左旋。2.2 分類螺紋密封（55°）非螺紋密封（55°）60°，1°4755°1°47圓柱內螺紋圓柱管螺紋圓錐管螺紋圓柱管螺紋圓錐內螺紋圓錐外螺紋英制RcRRp/Ps（舊）G/PFPT美制N

6、PSNPT國標RcRRp/PsG/PFNPT細螺紋粗螺紋超細螺紋公制M英制UNFUNCUNEF  常用螺紋的種類類型 牙型放大圖 特征代號 標注示例 用途及說明 普通螺紋 粗牙 M 最常用的一種聯接螺紋，直徑相同時，細牙螺紋的螺距比粗牙螺紋的螺距小，粗牙螺紋不注螺距 細牙 管螺紋 非螺紋密封 G 管道聯接中的常用螺紋，螺距及牙型均較小，其尺寸代號以in為單位，近似地等于管子的孔徑。螺紋的大徑應從有關標準中查出，代號R表示圓錐外螺紋，Rc表示圓錐內螺紋， Rp表示圓柱內螺紋 螺紋密封 Rc Rp R 梯形 螺紋 Tr 常用的兩種傳動螺紋，用于傳遞運動和動力，梯形螺紋可傳遞雙向

7、動力，鋸齒形螺紋用來傳遞單向動力 距齒形螺紋 B 2.3 精度等級螺紋精度是由螺紋公差帶和旋合長度共同組成的衡量螺紋質量的綜合指標。螺紋公差帶代號包括中徑公差帶與頂徑公差帶代號。公差帶代號是由表示其大小的公差等級數字和表示其位置的字母組成。如6H，6g等。螺紋公差帶代號標注在螺紋代號之后，中間用分開。如螺紋的中徑公差帶與頂徑公差帶代號不同，則分別注出。前者表示中徑公差帶，后者表示頂徑公差帶。如螺紋的中徑公差帶與頂徑公差帶代號相同，則只注一個代號。名稱螺紋等級螺紋種類國家標準公制牙JIS1級2級3級公螺紋ISO4h6g8g母螺紋4H.5H5H.6H7H美制牙公螺紋JIS3A2A1AISO母螺紋J

8、IS3B2B1BISO英制牙2級3級4級2.4 螺紋標注當螺紋精度要求較高時，除標注螺紋代號外，還應標注螺紋公差帶代號和螺紋旋合長度。2.4.1 螺紋標記的標注格式為： 螺紋代號螺紋公差帶代號（中徑、頂徑）旋合長度l）公差帶代號由數字加字母表示（內螺紋用大寫字母，外螺紋用小寫字母），如 7H、6g等，應特別指出，7H，6g等代表螺紋公差，而H7，g6代表圓柱體公差代號。2）旋合長度規定為短（用S表示）、中（用N表示）、長（用L表示）三種。一般情況下，不標注螺紋旋合長度，其螺紋公差帶按中等旋合長度（N）確定。必要時，可加注旋合長度代號S或L，如“ M20-5g6gL”。特殊需要時，可注

9、明旋合長度的數值，如“M20-5g6g30”。2.4.2、普通螺紋普通粗牙螺紋：特征代號M+ 公稱直徑+旋向+螺紋公差帶代號（中徑、頂徑）旋合長度普通細牙螺紋：特征代號M+ 公稱直徑*螺距+旋向+螺紋公差帶代號（中徑、頂徑）旋合長度右旋螺紋省略不注，左旋用“ LH”表示。M 165g6g表示粗牙普通螺紋，公稱直徑16，右旋，螺紋公差帶中徑 5g，大徑  6g，旋合長度按中等長度考慮。M16×1 LH6G表示細牙普通螺紋，公稱直徑16，螺距1，左旋，螺紋公差帶中徑、大徑均為6G，旋合長度按中等長度考慮。2.4.3、管螺紋的標注格式為：特征代號（圓柱管螺紋用G表示，圓錐管螺紋用

10、NPT表示）+ 尺寸代號+公差等級代號+旋向G1A-LH表示英制非螺紋密封管螺紋，尺寸代號1in，右旋，公差等級為A級。Rcl2表示英制螺紋密封錐管螺紋，尺寸代號12in，右旋。2.5    基本尺寸2.5.1公制螺紋公制細牙內螺紋公制粗牙內螺紋規格標準徑6H精度規格標準徑6H精度DmaxDminDmaxDminM2.5*0.352.15 2.1842.121M1.4*0.31.10 1.161.075M3.0*0.352.65 2.6842.621M1.6*0.351.25 1.3211.221M3.5*0.353.15 3.2213.121M1.8*

11、0.351.45 1.5211.421M4.0*0.503.50 3.5993.459M2.0*0.41.60 1.6791.567M4.5*0.504.00 4.0993.959M2.2*0.451.75 1.8381.713M5.0*0.504.50 4.5994.459M2.5*0.452.05 2.1382.013M5.5*0.505.00 5.0994.959M3.0*0.52.50 2.5992.459M6.0*0.755.25 5.3785.188M3.5*0.62.90 3.012.85M7.0*0.756.25 6.3786.188M4.0*0.73.30 3.4223.24

12、2M8*0.757.25 7.3787.188M4.5*0.753.75 3.8783.688M8*1.007.00 7.1536.917M5.0*0.84.20 4.3344.134M9*0.758.25 8.3788.188M5.5*0.55.00 5.0994.959M9*1.008.00 8.1537.917M6.0*1.005.00 5.1534.917M10*0.759.25 9.3789.188M7.0*1.006.00 6.1535.917M10*1.009.11 9.1538.917M8.0*1.256.75 6.9126.647M10*1.258.75 8.9128.647

13、M9.0*1.257.75 7.9127.647M11*0.7510.25 10.37810.188M10*1.508.50 8.6768.376M11*1.0010.00 10.1539.917M11*1.509.50 9.6769.376M12*1.0010.75 10.91210.647M12*1.7510.25 10.4410.106M12*1.2510.50 10.67610.376M14*2.0012.00 12.2111.835M12*1.5011.00 11.15310.917M15*1.5013.50 13.67613.375M14*1.0013.00 13.15312.91

14、7M16*2.0014.00 14.2113.835M14*1.2512.75 12.91212.647M17*1.5015.50 15.67615.376M14*1.5012.50 12.67612.376M18*2.5015.50 15.74415.294M15*1.014.00 14.15313.917M20*2.5017.50 17.74417.294M15*1.5013.50 13.67613.376M22*2.5019.50 19.74419.294M16*1.015.00 15.15314.917M24*3.0021.00 21.25220.752M16*1.5014.50 14

15、.67614.376M27*3.0024.00 24.25223.752M17*1.016.00 16.15315.917M30*3.5026.50 26.77126.211M17*1.5015.50 16.67615.376M18*1.017.00 17.15316.917M18*1.516.50 16.67616.376M18*2.016.00 16.2115.835M20*1.019.00 19.15318.917M20*1.5018.50 18.67618.376M20*2.018.00 18.2117.835M22*1.021.00 21.15320.917M22*1.5020.50

16、 20.67620.376M22*2.020.00 20.2119.835M24*1.023.00 23.15322.917M24*1.5022.50 22.67622.376M24*2.022.00 22.2121.835M25*1.024.00 24.15323.917M25*1.523.50 23.67623.376M25*2.023.00 23.2122.835M26*1.5024.50 24.67624.376M27*1.026.00 26.15325.917M27*1.525.50 25.67625.376M28*1.027.00 27.15326.917M28*1.526.50

17、26.67626.376M28*2.026.00 26.2125.835M30*1.029.00 29.15328.917M30*1.5028.50 28.67628.376M30*2.028.00 28.2127.835M30*3.027.00 27.25226.7525.5.2統一標準螺紋公稱尺寸大徑中徑小徑公稱尺寸大徑中徑小徑UNC粗牙UNF細牙UNC粗牙UNF細牙0-801.5241.3181.1819/16-1214.28812.91311.9961-641.8541.5981.4259/16-1814.28813.37112.7611-721.8541.6261.4375/8-11

18、14.87514.37613.3762-562.1841.891.6945/8-1814.87514.95814.3482-642.1841.9281.7553/4-1019.050 17.39916.301 3-842.5152.1721.9413/4-1619.050 18.01917.337 3-562.5152.222.0247/8-922.225 20.39119.169 4-402.8452.4332.1567/8-1422.225 21.04620.265 4-482.8452.5022.2711-825.400 23.33821.963 5-403.1752.7642.4871

19、-1225.400 24.02623.109 5-443.1752.7092.5511 1/8 -728.575 26.21824.648 6-323.5052.992.6471 1/8-1228.575 27.20126.284 6-403.5053.0942.8171 1/4 -731.750 29.39327.823 8-324.1643.653.3071 1/4-1231.750 30.37629.459 8-364.1643.7083.4011 3/8 -634.925 32.17430.343 10-244.8264.1383.681 3/8-1234.925 33.55132.6

20、34 10-324.8264.313.9671 1/2 -638.100 35.34933.518 12-245.4864.7984.3411 1/2-1238.100 36.72635.809 12-285.4864.8974.5031 3/4-544.450 41.15138.951 1/4-206.355.5244.972-4 1/250.800 47.13544.690 1/4-286.355.7615.3672 1/4-4 1/257.150 53.48551.039 5/16-187.9387.0216.4112 1/2-463.500 59.37556.626 5/16-247.

21、9387.2496.7922 3/4-469.850 65.72562.976 3/8-169.5258.4947.8053/476.200 72.07569.326 3/8-249.5258.8378.3973 1/4-4 82.550 78.42575.676 7/16-1411.1129.9349.1493 1/2-488.900 84.77582.026 7/16-2011.11210.2879.7383 3/4-495.250 91.12588.376 1/2-1312.711.4310.5844-4101.600 97.47594.726 1/2-2012.711.87411.32

22、6UNEF螺牙基本尺寸代號螺紋牙數標準徑大徑小徑 1/4325.65.695.4865/16327.17.2647.0873/8328.78.8658.6617/162810.210.33810.1351/22811.811.93811.7099/162413.213.38613.1325/82414.814.98614.7323/42017.817.95817.6787/8202121.13320.8531202424.30824.0285.5.3 NPT、G螺紋基本尺寸NPT螺紋基本尺寸G（PF）螺紋基本尺寸代號螺紋牙數大徑中徑小徑代號螺紋牙數大徑中徑小徑1/16277.8957.1426

23、.3891/16287.7237.1426.561 1/82710.2429.4898.736 1/8289.7289.1478.566 1/41813.61612.48711.358 1/41913.15712.30111.445 3/81817.05515.92614.797 3/81916.66215.80614.95 1/21421.22319.77218.321 1/21420.95519.79318.631 3/41426.56825.11723.666 5/81422.91121.74920.5871 11.533.22831.46129.694 3/41426.44125.27

24、924.1171 1/411.541.98540.21838.451 7/81430.20129.03927.8771 1/211.548.05446.28744.521 1133.24931.7730.2912 11.560.09258.32556.5581 1/81137.89736.41834.9392 1/2872.69970.15967.6191 1/41141.9140.43138.9523 888.60886.06883.5281 1/21147.80346.32444.8543 1/28101.31698.77696.2361 3/41153.74652.26750.7884

25、8113.973111.433108.8932 1159.61458.13556.6565 8140.952138.412135.8722 1/41165.7164.23162.7526 8167.792165.252162.7122 1/21175.18473.70572.2268 8218.441215.901213.3612 3/41181.53480.05578.57610 8272.312269.772267.2323 1187.88486.40584.92612 8323.032320.492317.9523 1/211100.3398.85197.3725.5.4 RP螺紋基本尺

26、寸RP螺紋基本尺寸代號螺紋牙數大徑中徑小徑1/16287.7237.1426.561 1/8289.7289.1478.566 1/41913.15712.30111.445 3/81916.66215.80614.95 1/21420.95519.79318.631 3/41426.44125.27924.1171 1133.24931.7730.2911 1/41141.9140.43138.9521 1/21147.80346.32444.8452 1159.61458.13556.6562 1/21175.18473.70572.2263 1187.88486.40584.9262.6

27、擠牙絲攻攻牙底孔徑公制螺紋（非圓絲攻）美制螺紋（非圓絲攻）螺紋標準2級螺紋用下孔徑螺紋標準2級螺紋用下孔徑精度最大-最小（咬合率）精度最大-最小（咬合率）M1.75*0.35RH41.54-1.58（100-75%）NO.2-56UNC -64UNFRH41.96-2.02（100-65%）M2*0.4RH41.81-1.85（100-75%）RH31.98-2.04（100-65%）M2.3*0.4RH42.11-2.15（100-75%）NO.3-48UNC -56UNFRH42.25-2.32（100-65%）M2.5*0.45RH42.28-2.33（100-75%）RH42.29-2

28、.357（100-65%）M2.6*0.45RH42.38-2.43（100-75%）NO.4-40UNC -48UNFRH52.52-2.60（100-70%）M3*0.5RH52.76-2.81（100-75%）RH42.57-2.64（100-70%）M3.5*0.6RH53.20-3.26（100-75%）NO.5-40UNC -44UNFRH52.86-2.93（100-70%）M4*0.7RH63.65-3.70（100-85%）RH42.88-2.95（100-70%）M5*0.8RH64.95-4.66（100-85%）NO.6-32UNC -40UNFRH53.09-3.17

29、（100-70%）M6*1RH75.48-5.57（100-85%）RH53.19-3.26（100-70%）NO.8-32UNC -36UNFRH63.76-3.84（100-75%）RH53.80-3.88（100-75%）NO.10-24UNC -32UNFRH64.26-4.35（100-80%）RH54.41-4.48（100-80%）NO.12-24UNC -28UNFRH64.92-5.01（100-80%）RH55.00-5.08（100-80%）1/4-20UNC -28UNFRH65.66-5.76（100-80%）RH55.86-5.93（100-80%）3. 鋁合金3.

30、1 鋁合金成分壓鑄材料允收準鋁合金 牌 號化學成分（%）SiFeCuMnMgZnNiSnAlADC129.6-12.01.31.5-3.50.50.310.50.2余量ADC61.00.60.100.4-0.62.6-4.00.40.10.1余量A41311.0-13.01.310.350.10.050.50.15余量A3807.5-9.51.33.0-4.00.50.130.50.35余量4. 公差制造零件時，為了使零件具有互換性，要求零件的尺寸在一個合理范圍之內，由此就規定了極限尺寸。制成后的實際尺寸，應在規定的最大極限尺寸和最小極限尺寸范圍內。允許尺寸的變動量稱為尺寸公差，簡稱公差。標準

31、公差：標準公差IT的數值由基本是標準所列的用以確認公差帶大小的任一公差。標準公差分為20個等級，即：IT01、IT02、IT1至IT18。IT表示標準公差，數字表示公差等級。IT01公差數值最小，精度最高；IT18公差數值最大，精度最低。基本尺寸：設計給定的尺寸。極限尺寸：允許尺寸變動的兩個極限值，它是以基本尺寸為基數來確定的。偏 差：某一實際尺寸減其基本尺寸所得的代數差。極限偏差：即指上偏差和下偏差。最大極限尺寸減其基本尺寸所得的代數差就是上偏差；最小極限尺寸減其基本尺寸所得的代數差就是下偏差。尺寸公差：允許尺寸的變動量。即最大極限尺寸與最小極限尺寸之差；也等于上偏差和下偏差代數差的絕對值。

32、4.1 ISOISO2768-1（GB/T1804-92）表1線性尺寸的極限偏差數值公差Limits in mm for nominal sizes in mm符號描述0.5-33663030120120400400 1000100020002000 4000ffine±0.05±0.05±0.1±0.15±0.2±0.3±0.5mmedium±0.1±0.1±0.2±0.3±0.5±0.8±1.2±2ccoarse±0.2±

33、0.3±0.5±0.8±1.2±2±3±4vvery coarse±0.5±1±1.5±2.5±4±6±8For nominal sizes below 0,5 mm the limit measures are to be indicated directly at the nominal measure.表2倒角半徑與倒角高度尺寸的極限偏差數值公差Limits in mm for nominal sizes in mm符號描述0.53366以上ffine

34、7;0.2±0.5±1mmediumccoarse±0.4±1±2vvery coarse表3角度尺寸的極限偏差數值公差Limits in mm for nominal sizes in mm符號描述10以上10-5050-120120-400400以上ffine±10±0030±0020±0010±005mmediumccoarse±1030±10±0030±0015±0010vvery coarse±30±20±

35、10±0030±0020 4.2 JIS更多免費下載，盡在管理資源吧（）常用穴寸法許容差寸法區分寸法區分以下E6E7F6F7F8G6G7H5H6H7H8H9H10Js6Js7J6J7K6K7M6M7N6N7P6P7以下36+28+32+18+22+28+12+16+5+8+12+18+30+48+4+6+5+6+2+3-10-5-4-9-836+20+20+10+10+10+4+4+ 0+ 0+ 0+ 0+ 0+ 0-4-6-3-6-6-9-9-12-13-16-17-20610+ 34+ 5+ 22+ 28+ 35+ 14+ 20+ 6+ 9+ 15+ 22+ 36+ 5

36、8+ 4.5+ 7.5+ 5+ 8+ 2+ 5- 3+ 0- 7- 4- 12- 9610+ 25+ 25+ 13+ 13+ 13+ 5+ 5+ 0+ 0+ 0+ 0+ 0+ 0- 4.5- 7.5- 4- 7- 7- 10- 12- 15- 16- 19- 21- 241014+ 43+ 50+ 27+ 34+ 43+ 17+ 24+ 8+ 11+ 18+ 27+ 43+ 70+ 5.5+ 9.0+ 6+ 10+ 2+ 6- 4+ 0- 9- 5- 15- 1110141418+ 32+ 32+ 16+ 16+ 16+ 6+ 6+ 0+ 0+ 0+ 0+ 0+ 0- 5.5- 9.0- 5-

37、 8- 9- 12- 15- 18- 20- 23- 26- 2914181824+ 53+ 61+ 33+ 41+ 53+ 20+ 28+ 9+ 13+ 21+ 33+ 52+ 84+ 6.5+ 10.5+ 8+ 12+ 2+ 6- 4+ 0- 11- 7- 18- 1418242430+ 40+ 40+ 20+ 20+ 20+ 7+ 7+ 0+ 0+ 0+ 0+ 0+ 0- 6.5- 10.5- 5- 9- 11- 15- 17- 21- 24- 28- 31- 3524303040+ 66+ 75+ 41+ 50+ 64+ 25+ 34+ 11+ 16+ 25+ 39+ 62+ 100+

38、 8.0+ 12.5+ 10+ 14+ 3+ 7- 4+ 0- 12- 8- 21- 1730404050+ 50+ 50+ 25+ 25+ 25+ 9+ 9+ 0+ 0+ 0+ 0+ 0+ 0- 8.0- 12.5- 6- 11- 13- 18- 20- 25- 28- 33- 37- 4240505065+ 79+ 90+ 49+ 60+ 76+ 29+ 40+ 13+ 19+ 30+ 46+ 74+ 120+ 9.5+ 15.0+ 13+ 18+ 4+ 9- 5+ 0- 14- 9- 26- 2150656580+ 60+ 60+ 30+ 30+ 30+ 10+ 10+ 0+ 0+ 0+

39、 0+ 0+ 0- 9.5- 15.0- 6- 12- 15- 21- 24- 30- 33- 39- 45- 51658080100+ 94+ 107+ 58+ 71+ 90+ 34+ 47+ 15+ 22+ 35+ 54+ 87+ 140+ 11.0+ 17.5+ 16+ 22+ 4+ 10+ 6+ 0- 16- 10- 30- 2480100100120+ 72+ 72+ 36+ 36+ 36+ 12+ 12+ 0+ 0+ 0+ 0+ 0+ 0- 11.0- 17.5- 6- 13- 18- 25- 28- 40- 38- 45- 52- 59100120120140+ 110+ 125

40、+ 68+ 83+ 103+ 39+ 54+ 18+ 25+ 40+ 63+ 100+ 160+ 12.5+ 20.0+ 18+ 26+ 4+ 12- 8+ 0- 20- 12- 36- 28120140140160140160160180+ 85+ 85+ 43+ 43+ 43+ 14+ 14+ 0+ 0+ 0+ 0+ 0+ 0- 12.5- 20.0- 7- 14- 21- 28- 33- 40- 45- 52- 61- 68160180180200+ 129+ 146+ 79+ 96+ 122+ 44+ 61+ 20+ 29+ 46+ 72+ 115+ 185+ 14.5+ 23.0+ 22+ 30+ 5+ 13- 8+ 0- 22- 14- 41- 33180180200225200225225250+ 100+ 100+ 50+ 50+ 50+ 25+ 15+ 0+ 0+ 0+ 0+ 0+ 0- 14.5- 23.0- 7- 16- 24- 33- 37- 46- 51- 60- 70- 79225250250280+ 142+ 162+ 88+ 108+ 137+ 49+ 69+ 23+ 32+ 52+ 81+ 130+ 210+ 16.0+ 26.0+ 25+ 36+ 5+ 16- 9+ 0- 25- 14- 47- 36250280280315+ 110