Pengenalan kepada Toleransi Benang Metrik
Panduan ini memberikan gambaran keseluruhan komprehensif tentang toleransi untuk diameter pic (D2) bagi benang dalaman metrik, sejajar dengan piawaian ISO 965-1 untuk benang skru metrik tujuan umum. Toleransi ini memastikan kebolehtukaran, kesesuaian dan prestasi dalam pemasangan mekanikal. Diameter pic adalah kritikal kerana ia menentukan luas sentuhan berkesan antara benang yang sepadan, mempengaruhi kekuatan dan sifat pengedap. Sumber ini menambah perbincangan yang lebih luas tentang diameter major, pic dan minor, dengan memberi tumpuan khusus pada benang dalaman D2 nilai merentasi pelbagai gred dan saiz toleransi dari M1 hingga M300.
Pematuhan kepada piawaian ISO menjamin kebolehpercayaan dalam industri seperti automotif, aeroangkasa dan pembuatan jentera. Toleransi ditentukan untuk gred seperti 4H hingga 8H, dengan had maksimum dan minimum dalam milimeter, membolehkan pemesinan dan kawalan kualiti yang tepat.
Konsep Utama: Diameter Pitch D2 untuk Benang Dalaman
Diameter padang D2 mewakili silinder khayalan di mana lebar benang sama dengan lebar ruang, penting untuk penglibatan benang. Bagi benang dalaman, toleransi ditakrifkan oleh had sisihan atas dan bawah berdasarkan kelas toleransi (cth., 6H untuk padanan sederhana).
- Gred Toleransi: Julat dari 4 (kasar) hingga 8 (halus), dengan H menunjukkan benang dalaman dan tiada sisihan asas (es=0).
- Pengaruh Padang: Pic yang lebih halus memerlukan toleransi yang lebih ketat untuk mengekalkan kekuatan; nilai berbeza mengikut saiz nominal dan pic.
- Pengukuran: Gunakan mikrometer ulir atau kaedah tiga dawai untuk pengesahan, memastikan pematuhan dengan had ISO 965.
Memahami perkara ini memastikan prestasi benang yang optimum, sekali gus mencegah masalah seperti pelucutan atau kelonggaran pada pemasangan.
Jadual Toleransi untuk Diameter Pic Benang Dalaman D2
Jadual di bawah menyenaraikan D maksimum dan minimum2 dimensi dalam mm untuk ulir dalaman metrik mengikut ISO 965-1. Ia merangkumi saiz dan pic biasa, dengan kelas toleransi diserlahkan (cth., 6H berwarna hijau untuk kegunaan standard). Gunakan ini untuk reka bentuk dan pemeriksaan; rujuk dokumentasi penuh ISO untuk pic tambahan.
| Kelas Toleransi | Had | M1 | M1.1 | M1.2 | M1.4 | M1.6 | M1.8 | M2 | M2.2 | M2.5 | M3 | M3.5 | M4 | M4.5 | M5 | M5.5 | M6 | M7 | M8 | M9 | M10 | M11 | M12 | M14 | M15 | M16 | M17 | M18 | M20 | M22 | M24 | M25 | M26 | M27 | M28 | M30 | M32 | M33 | M35 | M36 | M38 | M39 | M40 | M42 | M45 | M48 | M50 | M52 | M55 | M56 | M58 | M60 | M62 | M64 | M65 | M68 | M70 | M72 | M75 | M76 | M78 | M80 | M82 | M85 | M90 | M95 | M100 | M105 | M110 | M115 | M120 | M125 | M130 | M135 | M140 | M145 | M150 | M155 | M160 | M165 | M170 | M175 | M180 | M185 | M190 | M195 | M200 | M205 | M210 | M215 | M220 | M225 | M230 | M235 | M240 | M245 | M250 | M255 | M260 | M265 | M270 | M275 | M280 | M285 | M290 | M295 | M300 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| 0.25 | 0.2 | 0.25 | 0.2 | 0.25 | 0.2 | 0.3 | 0.2 | 0.35 | 0.2 | 0.35 | 0.2 | 0.4 | 0.25 | 0.45 | 0.25 | 0.45 | 0.35 | 0.5 | 0.35 | 0.6 | 0.35 | 0.7 | 0.5 | 0.75 | 0.5 | 0.8 | 0.5 | 0.5 | 1 | 0.75 | 1 | 0.75 | 1.25 | 1 | 0.75 | 1.25 | 1 | 0.75 | 1.5 | 1.25 | 1 | 0.75 | 1.5 | 1 | 0.75 | 1.75 | 1.5 | 1.25 | 1 | 2 | 1.5 | 1.25 | 1 | 1.5 | 1 | 2 | 1.5 | 1 | 1.5 | 1 | 2.5 | 2 | 1.5 | 1 | 2.5 | 2 | 1.5 | 1 | 2.5 | 2 | 1.5 | 1 | 3 | 2 | 1.5 | 1 | 2 | 1.5 | 1 | 1.5 | 3 | 2 | 1.5 | 1 | 2 | 1.5 | 1 | 3.5 | 3 | 2 | 1.5 | 1 | 2 | 1.5 | 3.5 | 3 | 2 | 1.5 | 1.5 | 4 | 3 | 2 | 1.5 | 1.5 | 4 | 3 | 2 | 1.5 | 3 | 2 | 1.5 | 4.5 | 4 | 3 | 2 | 1.5 | 4.5 | 4 | 3 | 2 | 1.5 | 5 | 4 | 3 | 2 | 1.5 | 3 | 2 | 1.5 | 5 | 4 | 3 | 2 | 1.5 | 4 | 3 | 2 | 1.5 | 5.5 | 4 | 3 | 2 | 1.5 | 4 | 3 | 2 | 1.5 | 5.5 | 4 | 3 | 2 | 1.5 | 4 | 3 | 2 | 1.5 | 6 | 4 | 3 | 2 | 1.5 | 4 | 3 | 2 | 1.5 | 6 | 4 | 3 | 2 | 1.5 | 6 | 4 | 3 | 2 | 1.5 | 6 | 4 | 3 | 2 | 1.5 | 4 | 3 | 2 | 1.5 | 6 | 4 | 3 | 2 | 1.5 | 2 | 6 | 4 | 3 | 2 | 1.5 | 2 | 6 | 4 | 3 | 2 | 6 | 4 | 3 | 2 | 6 | 4 | 3 | 2 | 6 | 4 | 3 | 2 | 6 | 4 | 3 | 2 | 6 | 4 | 3 | 2 | 6 | 4 | 3 | 2 | 6 | 4 | 3 | 2 | 8 | 6 | 4 | 3 | 2 | 6 | 4 | 3 | 8 | 6 | 4 | 3 | 6 | 4 | 3 | 8 | 6 | 4 | 3 | 6 | 4 | 3 | 8 | 6 | 4 | 3 | 6 | 4 | 3 | 8 | 6 | 4 | 3 | 6 | 4 | 3 | 8 | 6 | 4 | 3 | 6 | 4 | 3 | 8 | 6 | 4 | 3 | 6 | 4 | 3 | 8 | 6 | 4 | 3 | 6 | 4 | 3 | 8 | 6 | 4 | 3 | 6 | 4 | 8 | 6 | 4 | 6 | 4 | 8 | 6 | 4 | 6 | 4 | 8 | 6 | 4 | 6 | 4 | 8 | 6 | 4 | 6 | 4 | 8 | 6 | 4 | ||||||||||||||||||||||||||||||||||||
| 4G | Maks | 0.901 | 0.927 | 1.001 | 1.027 | 1.101 | 1.127 | 1.271 | 1.327 | 1.445 | 1.529 | 1.645 | 1.729 | 1.815 | 1.904 | 1.988 | 2.104 | 2.288 | 2.345 | 2.758 | 2.848 | 3.202 | 3.348 | 3.642 | 3.758 | 4.11 | 4.258 | 4.584 | 4.758 | 5.258 | 5.472 | 5.62 | 6.472 | 6.62 | 7.316 | 7.472 | 7.62 | 8.316 | 8.472 | 8.62 | 9.17 | 9.316 | 9.472 | 9.62 | 10.17 | 10.472 | 10.62 | 11.022 | 11.176 | 11.328 | 11.477 | 12.871 | 13.176 | 13.328 | 13.477 | 14.176 | 14.477 | 14.871 | 15.176 | 15.477 | 16.176 | 16.477 | 16.558 | 16.871 | 17.176 | 17.477 | 18.558 | 18.871 | 19.176 | 19.477 | 20.558 | 20.871 | 21.176 | 21.477 | 22.27 | 22.879 | 23.183 | 23.483 | 23.879 | 24.183 | 24.483 | 25.183 | 25.27 | 25.879 | 26.183 | 26.483 | 26.879 | 27.183 | 27.483 | 27.96 | 28.27 | 28.879 | 29.183 | 29.483 | 30.879 | 31.183 | 30.96 | 31.27 | 31.879 | 32.183 | 34.183 | 33.652 | 34.27 | 34.879 | 35.183 | 37.183 | 36.652 | 37.27 | 37.879 | 38.183 | 38.27 | 38.879 | 39.183 | 39.34 | 39.652 | 40.27 | 40.879 | 41.183 | 42.34 | 42.652 | 43.27 | 43.879 | 44.183 | 45.036 | 45.662 | 46.28 | 46.889 | 47.19 | 48.28 | 48.889 | 49.19 | 49.036 | 49.662 | 50.28 | 50.889 | 51.19 | 52.662 | 53.28 | 53.889 | 54.19 | 52.727 | 53.662 | 54.28 | 54.889 | 55.19 | 55.662 | 56.28 | 56.889 | 57.19 | 56.727 | 57.662 | 58.28 | 58.889 | 59.19 | 59.662 | 60.28 | 60.889 | 61.19 | 60.419 | 61.662 | 62.28 | 62.889 | 63.19 | 62.662 | 63.28 | 63.889 | 64.19 | 64.419 | 65.662 | 66.28 | 66.889 | 67.19 | 66.419 | 67.662 | 68.28 | 68.889 | 69.19 | 68.419 | 69.662 | 70.28 | 70.889 | 71.19 | 72.662 | 73.28 | 73.889 | 74.19 | 72.419 | 73.662 | 74.28 | 74.889 | 75.19 | 76.889 | 76.419 | 77.662 | 78.28 | 78.889 | 79.19 | 80.889 | 81.419 | 82.662 | 83.28 | 83.889 | 86.419 | 87.662 | 88.28 | 88.889 | 91.433 | 92.674 | 93.29 | 93.899 | 96.433 | 97.674 | 98.29 | 98.899 | 101.433 | 102.674 | 103.29 | 103.899 | 106.433 | 107.674 | 108.29 | 108.899 | 111.433 | 112.674 | 113.29 | 113.899 | 116.433 | 117.674 | 118.29 | 118.899 | 121.433 | 122.674 | 123.29 | 123.899 | 126.433 | 127.674 | 128.29 | 128.899 | 131.433 | 132.674 | 133.29 | 133.899 | 136.433 | 137.674 | 138.29 | 138.899 | 141.433 | 142.674 | 143.29 | 143.899 | 145.184 | 146.433 | 147.674 | 148.29 | 148.899 | 151.433 | 152.674 | 153.29 | 155.184 | 156.433 | 157.674 | 158.29 | 161.433 | 162.674 | 163.29 | 165.184 | 166.433 | 167.674 | 168.29 | 171.433 | 172.674 | 173.29 | 175.184 | 176.433 | 177.674 | 178.29 | 181.448 | 182.698 | 183.312 | 185.204 | 186.448 | 187.698 | 188.312 | 191.448 | 192.698 | 193.312 | 195.204 | 196.448 | 197.698 | 198.312 | 201.448 | 202.698 | 203.312 | 205.204 | 206.448 | 207.698 | 208.312 | 211.448 | 212.698 | 213.312 | 215.204 | 216.448 | 217.698 | 218.312 | 221.448 | 222.698 | 223.312 | 225.204 | 226.448 | 227.698 | 228.312 | 231.448 | 232.698 | 233.312 | 235.204 | 236.448 | 237.698 | 238.312 | 241.448 | 242.698 | 243.312 | 245.204 | 246.448 | 247.698 | 248.312 | 251.448 | 252.698 | 255.204 | 256.448 | 257.698 | 261.448 | 262.698 | 265.204 | 266.448 | 267.698 | 271.448 | 272.698 | 275.204 | 276.448 | 277.698 | 281.448 | 282.698 | 285.204 | 286.448 | 287.698 | 291.448 | 292.698 | 295.204 | 296.448 | 297.698 |
| Min | 0.856 | 0.887 | 0.956 | 0.987 | 1.056 | 1.087 | 1.223 | 1.287 | 1.392 | 1.487 | 1.592 | 1.687 | 1.759 | 1.856 | 1.928 | 2.056 | 2.228 | 2.292 | 2.695 | 2.792 | 3.131 | 3.292 | 3.567 | 3.695 | 4.035 | 4.195 | 4.504 | 4.695 | 5.195 | 5.377 | 5.535 | 6.377 | 6.535 | 7.216 | 7.377 | 7.535 | 8.216 | 8.377 | 8.535 | 9.058 | 9.216 | 9.377 | 9.535 | 10.058 | 10.377 | 10.535 | 10.897 | 11.058 | 11.216 | 11.377 | 12.739 | 13.058 | 13.216 | 13.377 | 14.058 | 14.377 | 14.739 | 15.058 | 15.377 | 16.058 | 16.377 | 16.418 | 16.739 | 17.058 | 17.377 | 18.418 | 18.739 | 19.058 | 19.377 | 20.418 | 20.739 | 21.058 | 21.377 | 22.1 | 22.739 | 23.058 | 23.377 | 23.739 | 24.058 | 24.377 | 25.058 | 25.1 | 25.739 | 26.058 | 26.377 | 26.739 | 27.058 | 27.377 | 27.78 | 28.1 | 28.739 | 29.058 | 29.377 | 30.739 | 31.058 | 30.78 | 31.1 | 31.739 | 32.058 | 34.058 | 33.462 | 34.1 | 34.739 | 35.058 | 37.058 | 36.462 | 37.1 | 37.739 | 38.058 | 38.1 | 38.739 | 39.058 | 39.14 | 39.462 | 40.1 | 40.739 | 41.058 | 42.14 | 42.462 | 43.1 | 43.739 | 44.058 | 44.823 | 45.462 | 46.1 | 46.739 | 47.058 | 48.1 | 48.739 | 49.058 | 48.823 | 49.462 | 50.1 | 50.739 | 51.058 | 52.462 | 53.1 | 53.739 | 54.058 | 52.503 | 53.462 | 54.1 | 54.739 | 55.058 | 55.462 | 56.1 | 56.739 | 57.058 | 56.503 | 57.462 | 58.1 | 58.739 | 59.058 | 59.462 | 60.1 | 60.739 | 61.058 | 60.183 | 61.462 | 62.1 | 62.739 | 63.058 | 62.462 | 63.1 | 63.739 | 64.058 | 64.183 | 65.462 | 66.1 | 66.739 | 67.058 | 66.183 | 67.462 | 68.1 | 68.739 | 69.058 | 68.183 | 69.462 | 70.1 | 70.739 | 71.058 | 72.462 | 73.1 | 73.739 | 74.058 | 72.183 | 73.462 | 74.1 | 74.739 | 75.058 | 76.739 | 76.183 | 77.462 | 78.1 | 78.739 | 79.058 | 80.739 | 81.183 | 82.462 | 83.1 | 83.739 | 86.183 | 87.462 | 88.1 | 88.739 | 91.183 | 92.462 | 93.1 | 93.739 | 96.183 | 97.462 | 98.1 | 98.739 | 101.183 | 102.462 | 103.1 | 103.739 | 106.183 | 107.462 | 108.1 | 108.739 | 111.183 | 112.462 | 113.1 | 113.739 | 116.183 | 117.462 | 118.1 | 118.739 | 121.183 | 122.462 | 123.1 | 123.739 | 126.183 | 127.462 | 128.1 | 128.739 | 131.183 | 132.462 | 133.1 | 133.739 | 136.183 | 137.462 | 138.1 | 138.739 | 141.183 | 142.462 | 143.1 | 143.739 | 144.904 | 146.183 | 147.462 | 148.1 | 148.739 | 151.183 | 152.462 | 153.1 | 154.904 | 156.183 | 157.462 | 158.1 | 161.183 | 162.462 | 163.1 | 164.904 | 166.183 | 167.462 | 168.1 | 171.183 | 172.462 | 173.1 | 174.904 | 176.183 | 177.462 | 178.1 | 181.183 | 182.462 | 183.1 | 184.904 | 186.183 | 187.462 | 188.1 | 191.183 | 192.462 | 193.1 | 194.904 | 196.183 | 197.462 | 198.1 | 201.183 | 202.462 | 203.1 | 204.904 | 206.183 | 207.462 | 208.1 | 211.183 | 212.462 | 213.1 | 214.904 | 216.183 | 217.462 | 218.1 | 221.183 | 222.462 | 223.1 | 224.904 | 226.183 | 227.462 | 228.1 | 231.183 | 232.462 | 233.1 | 234.904 | 236.183 | 237.462 | 238.1 | 241.183 | 242.462 | 243.1 | 244.904 | 246.183 | 247.462 | 248.1 | 251.183 | 252.462 | 254.904 | 256.183 | 257.462 | 261.183 | 262.462 | 264.904 | 266.183 | 267.462 | 271.183 | 272.462 | 274.904 | 276.183 | 277.462 | 281.183 | 282.462 | 284.904 | 286.183 | 287.462 | 291.183 | 292.462 | 294.904 | 296.183 | 297.462 | |
| 4H | Maks | 0.883 | 0.91 | 0.983 | 1.01 | 1.083 | 1.11 | 1.253 | 1.31 | 1.426 | 1.512 | 1.626 | 1.712 | 1.796 | 1.886 | 1.968 | 2.086 | 2.268 | 2.326 | 2.738 | 2.829 | 3.181 | 3.329 | 3.62 | 3.738 | 4.088 | 4.238 | 4.56 | 4.738 | 5.238 | 5.446 | 5.598 | 6.446 | 6.598 | 7.288 | 7.446 | 7.598 | 8.288 | 8.446 | 8.598 | 9.138 | 9.288 | 9.446 | 9.598 | 10.138 | 10.446 | 10.598 | 10.988 | 11.144 | 11.3 | 11.451 | 12.833 | 13.144 | 13.3 | 13.451 | 14.144 | 14.451 | 14.833 | 15.144 | 15.451 | 16.144 | 16.451 | 16.516 | 16.833 | 17.144 | 17.451 | 18.516 | 18.833 | 19.144 | 19.451 | 20.516 | 20.833 | 21.144 | 21.451 | 22.222 | 22.841 | 23.151 | 23.457 | 23.841 | 24.151 | 24.457 | 25.151 | 25.222 | 25.841 | 26.151 | 26.457 | 26.841 | 27.151 | 27.457 | 27.907 | 28.222 | 28.841 | 29.151 | 29.457 | 30.841 | 31.151 | 30.907 | 31.222 | 31.841 | 32.151 | 34.151 | 33.592 | 34.222 | 34.841 | 35.151 | 37.151 | 36.592 | 37.222 | 37.841 | 38.151 | 38.222 | 38.841 | 39.151 | 39.277 | 39.592 | 40.222 | 40.841 | 41.151 | 42.277 | 42.592 | 43.222 | 43.841 | 44.151 | 44.965 | 45.602 | 46.232 | 46.851 | 47.158 | 48.232 | 48.851 | 49.158 | 48.965 | 49.602 | 50.232 | 50.851 | 51.158 | 52.602 | 53.232 | 53.851 | 54.158 | 52.652 | 53.602 | 54.232 | 54.851 | 55.158 | 55.602 | 56.232 | 56.851 | 57.158 | 56.652 | 57.602 | 58.232 | 58.851 | 59.158 | 59.602 | 60.232 | 60.851 | 61.158 | 60.339 | 61.602 | 62.232 | 62.851 | 63.158 | 62.602 | 63.232 | 63.851 | 64.158 | 64.339 | 65.602 | 66.232 | 66.851 | 67.158 | 66.339 | 67.602 | 68.232 | 68.851 | 69.158 | 68.339 | 69.602 | 70.232 | 70.851 | 71.158 | 72.602 | 73.232 | 73.851 | 74.158 | 72.339 | 73.602 | 74.232 | 74.851 | 75.158 | 76.851 | 76.339 | 77.602 | 78.232 | 78.851 | 79.158 | 80.851 | 81.339 | 82.602 | 83.232 | 83.851 | 86.339 | 87.602 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Min | 0.856 | 0.887 | 0.956 | 0.987 | 1.056 | 1.087 | 1.223 | 1.287 | 1.392 | 1.487 | 1.592 | 1.687 | 1.759 | 1.856 | 1.928 | 2.056 | 2.228 | 2.292 | 2.695 | 2.792 | 3.131 | 3.292 | 3.567 | 3.695 | 4.035 | 4.195 | 4.504 | 4.695 | 5.195 | 5.377 | 5.535 | 6.377 | 6.535 | 7.216 | 7.377 | 7.535 | 8.216 | 8.377 | 8.535 | 9.058 | 9.216 | 9.377 | 9.535 | 10.058 | 10.377 | 10.535 | 10.897 | 11.058 | 11.216 | 11.377 | 12.739 | 13.058 | 13.216 | 13.377 | 14.058 | 14.377 | 14.739 | 15.058 | 15.377 | 16.058 | 16.377 | 16.418 | 16.739 | 17.058 | 17.377 | 18.418 | 18.739 | 19.058 | 19.377 | 20.418 | 20.739 | 21.058 | 21.377 | 22.222 | 22.739 | 23.058 | 23.377 | 23.739 | 24.058 | 24.377 | 25.058 | 25.1 | 25.739 | 26.058 | 26.377 | 26.739 | 27.058 | 27.377 | 27.907 | 28.1 | 28.739 | 29.058 | 29.377 | 30.739 | 31.058 | 30.78 | 31.1 | 31.739 | 32.058 | 34.058 | 33.462 | 34.1 | 34.739 | 35.058 | 37.058 | 36.462 | 37.1 | 37.739 | 38.058 | 38.1 | 38.739 | 39.058 | 39.14 | 39.462 | 40.1 | 40.739 | 41.058 | 42.14 | 42.462 | 43.1 | 43.739 | 44.058 | 44.823 | 45.462 | 46.1 | 46.739 | 47.058 | 48.1 | 48.739 | 49.058 | 48.823 | 49.462 | 50.1 | 50.739 | 51.058 | 52.462 | 53.1 | 53.739 | 54.058 | 52.652 | 53.602 | 54.232 | 54.851 | 55.158 | 55.602 | 56.232 | 56.851 | 57.158 | 56.652 | 57.602 | 58.232 | 58.851 | 59.158 | 59.602 | 60.232 | 60.851 | 61.158 | 60.339 | 61.602 | 62.232 | 62.851 | 63.158 | 62.602 | 63.232 | 63.851 | 64.158 | 64.339 | 65.602 | 66.232 | 66.851 | 67.158 | 66.339 | 67.602 | 68.232 | 68.851 | 69.158 | 68.339 | 69.602 | 70.232 | 70.851 | 71.158 | 72.602 | 73.232 | 73.851 | 74.158 | 72.339 | 73.602 | 74.232 | 74.851 | 75.158 | 76.851 | 76.339 | 77.602 | 78.232 | 78.851 | 79.158 | 80.851 | 81.339 | 82.602 | 83.232 | 83.851 | 86.339 | 87.602 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Nota: Nilai adalah untuk rujukan; sahkan dengan ISO 965 untuk aplikasi tertentu. 6H yang diserlahkan adalah perkara biasa untuk kegunaan umum.
Kaedah Pengiraan untuk D2 Toleransi
Toleransi untuk D2 dikira menggunakan formula ISO 965: Had bawah = nominal D2 + EI, had atas = nominal D2 + EI + T, dengan EI ialah sisihan yang lebih rendah (0 untuk kelas H), T ialah magnitud gred toleransi.
- Tentukan nominal D2 = D – 0.6495P (diameter nominal D, pic P).
- Pilih gred (4-8) dan jawatan (H).
- Kira T daripada jadual atau formula T = 0.0015 * (D^{0.5} * P^{0.333} * faktor gred).
- Gunakan had untuk pemesinan.
Kaedah ini memastikan ketepatan, dengan alatan perisian membantu pengiraan yang kompleks.
Amalan Terbaik dalam Aplikasi
Gunakan toleransi berdasarkan keperluan pemasangan: Gunakan 6H untuk padanan standard, gred yang lebih ketat untuk aplikasi beban tinggi. Periksa dengan tolok yang dikalibrasi, dengan mempertimbangkan pengembangan bahan.
- Padankan dengan toleransi benang luaran (cth., 6g) untuk kesesuaian yang betul.
- Elakkan pengetatan berlebihan untuk mengelakkan herotan.
- Dokumenkan sisihan untuk jaminan kualiti.
Soalan Lazim
Apakah diameter pic nominal untuk ulir dalaman M10x1.5?
Nominal D2 = 10 – 0.6495*1.5 ≈ 9.026 mm; gunakan kelas toleransi untuk had.
Bagaimanakah gred toleransi mempengaruhi kesesuaian?
Gred yang lebih rendah (contohnya, 4H) membolehkan padanan yang lebih longgar untuk kemudahan pemasangan; lebih tinggi (8H) untuk ketepatan, mengikut ISO 965.
Mengapakah 6H biasa digunakan?
Ia menyediakan toleransi medium yang seimbang untuk kejuruteraan am, memastikan pertukaran yang boleh dipercayai.
Bolehkah toleransi dilaraskan untuk benang bersalut?
Ya, tambahkan elaun penyaduran pada had mengikut ISO 4042, biasanya 4-8 μm setiap sisi.
Bagaimana jika saiz tiada dalam jadual?
Gunakan formula ISO 965 untuk pengiraan atau rujuk piawaian lanjutan untuk lontaran bukan standard.
Cara mengukur D2 dengan tepat?
Gunakan kaedah tiga dawai dengan mikrometer, menggunakan diameter dawai berdasarkan pic untuk bacaan yang tepat.
