Gawo la magwiridwe antchito a ma bolts omwe amagwiritsidwa ntchito polumikizana ndi zitsulo ndi 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9 ndi zina zotero. Maboti a giredi 8.8 ndi kupitilira apo amapangidwa ndi chitsulo chochepa cha carbon alloy kapena chitsulo chapakati cha carbon ndi chotenthetsera (chozimitsidwa, chotenthedwa), chomwe nthawi zambiri chimatchedwa ma bolt amphamvu kwambiri ndipo enawo amatchedwa mabawuti wamba.Ulusi wolondola kwambiri ndiye chinsinsi chopangiraapamwamba CNC Machining zigawo.
Cholembera cha kalasi ya bawuti chimapangidwa ndi magawo awiri, omwe motsatana amayimira mphamvu yamphamvu yokhazikika komanso chiŵerengero cha bawuti. Monga:
Kwa ma bolts of performance class 4.6, tanthauzo lake ndi:
Kulimba kwamphamvu kwa bawuti kumafika ku 400MPa;
Chiŵerengero cha mphamvu za bawuti ndi 0,6;
Mphamvu yotulutsa mwadzina ya bawuti ndi 400 × 0.6 = 240MPa.
Magwiridwe kalasi 10.9 mkulu mphamvu bawuti, zinthu zake pambuyo kutentha mankhwala, akhoza kufika:
Mphamvu yodziwika bwino ya bawuti imafika 1000MPa;
Chiŵerengero cha mphamvu za bawuti ndi 0,9;
Mphamvu yotulutsa mwadzina ya bawuti ndi 1000×0.9=900MPa.
Tanthauzo la kalasi ya bolt ndi muyezo wapadziko lonse lapansi. Maboti a kalasi yofananira yogwira ntchito, mosasamala kanthu za kusiyana pakati pa zida zawo ndi chiyambi, amakhala ndi ntchito yofanana, ndipo gawo lokhalo lokhalo lingasankhidwe pamapangidwewo.
Magiredi amphamvu 8.8 ndi 10.9 amatanthawuza kumeta ubweya wa ma bolts 8.8GPa ndi 10.9GPa
8.8 Mwadzina wamakokedwe mphamvu 800N/MM2 mwadzina zokolola mphamvu 640N/MM2
Kawirikawiri, "x. Y" amagwiritsidwa ntchito kusonyeza mphamvu ya bawuti, X * 100 = mphamvu yolimba ya bawuti, X * 100 * (Y / 10) = mphamvu zokolola za bawuti (chifukwa molingana ndi chizindikiro: kutulutsa mphamvu / kulimba mphamvu = Y/10)
Monga 4.8, mphamvu yolimba ya bawuti ndi: 400MPa; Mphamvu zokolola ndi 400*8/10=320MPa.
Kuphatikiza apo: mabawuti osapanga dzimbiri nthawi zambiri amalembedwa kuti A4-70, A2-70, tanthauzo la kutanthauzira kwina.
Kuyeza the
Utali woyezera unit padziko lapansi masiku ano pali mitundu iwiri ikuluikulu, imodzi ya metric system, gawo loyezera ndi mita (m), centimita (cm), millimeters (mm), etc., ku Europe, China ndi Japan ndi ena kum'mwera chakum'mawa. Asia ntchito ndi zambiri, wina ndi English, gawo kuyeza makamaka mainchesi (inchi), lofanana ndi mzinda wakale "m'dziko lathu, chimagwiritsidwa ntchito mu United States, Britain ndi mayiko ena a ku Ulaya ndi America.
Muyezo wa metric: (m'munsi 10) 1m =100cm=1000 mm
Dongosolo la Imperial: (base 8) 1 inchi = 8 mphindi 1 inchi = 25.4 mm 3/8 x 25.4 = 9.52
Zogulitsa zomwe zili pansipa 1/4 zimagwiritsa ntchito nambala yoyimira kuyimira kukula kwa adilesi, monga: 4#, 5#, 6#, 7#, 8#, 10#, 12#
Ulusi wa screw
Ulusi ndi mawonekedwe okhala ndi mizere yozungulira yofananira pagawo lakunja kapena lamkati la cholimba. Malinga ndi mawonekedwe ake komanso ntchito zake zitha kugawidwa m'magulu atatu:
Ulusi wamba: mawonekedwe a mano atatu, omwe amagwiritsidwa ntchito polumikizana kapena kumangirira mbali. Ulusi wamba umagawidwa mu mitundu iwiri ya ulusi wokhuthala ndi ulusi wabwino molingana ndi phula, ndipo ulusi wabwino umakhala ndi mphamvu zolumikizana kwambiri.
Kufala ulusi: dzino mawonekedwe trapezoid, rectangle, macheka ndi makona atatu, etc.
Ulusi Wosindikizira: Amagwiritsidwa ntchito polumikizira chisindikizo, makamaka ulusi wa chitoliro, ulusi wa taper ndi ulusi wa chitoliro.
Gulu molingana ndi mawonekedwe:
Thread fit grade
Ulusi wolondola kwambiri ndi gawo lofunikira popangaapamwamba CNC Machining zigawo.
Kukwanira ndi kuchuluka kwa kufooka kapena kulimba pakati pa ulusi wopota, ndipo kalasi yoyenera ndi kuphatikiza kwapatukana ndi kulolerana komwe kumachitika mkati ndi kunja kwa ulusi.
1. Pa ulusi wa inchi yunifolomu, pali magiredi atatu a ulusi wakunja: 1A, 2A ndi 3A, ndi magiredi atatu a ulusi wamkati: 1B, 2B ndi 3B, zonse zomwe zili ndi kusiyana. Nambala yaudindo ikakwera, m'pamenenso imakhala yolimba. Mu inch THREADS, KUSINTHA kumangotchulidwa pamagiredi 1A ndi 2A okha, KUSINTHA kwa giredi 3A ndi ziro, ndipo kupatuka kwa giredi 1A ndi 2A ndikofanana. Kuchuluka kwa magiredi, kumachepetsa kulolerana.
Kalasi 1A ndi 1B, magiredi olekerera kwambiri, oyenera kulolerana ndi ulusi wamkati ndi kunja.
Makalasi 2A ndi 2B ndiye makalasi ambiri olekerera ulusi omwe amaperekedwa pagulu la Britain la zomangira zamakina.
Class 3A ndi 3B, screw kuti ikhale yolimba kwambiri, yoyenera zomangira zolimba, pamapangidwe ovuta kwambiri.
Kwa ulusi wakunja, CLASS 1A ndi 2A ali ndi kulekerera koyenera, CLASS 3A alibe. Kulekerera kwa Class 1A ndi 50% kuposa kulekerera kwa kalasi 2A, 75% yayikulu kuposa kulekerera kwa kalasi 3A, kwa ulusi wamkati, kulolerana kwa kalasi 2B ndi 30% kuposa kulekerera kwa 2A. Kalasi 1B ndi 50% yokulirapo kuposa kalasi 2B ndi 75% yokulirapo kuposa kalasi 3B.
2. Ulusi wazitsulo, ulusi wakunja uli ndi magulu atatu a ulusi: 4h, 6h ndi 6g, ulusi wamkati uli ndi magulu atatu a ulusi: 5H, 6H, 7H. (Magiredi olondola a ulusi wa tsiku ndi tsiku ndi I, II, III, ndipo kawirikawiri II.) Mu ulusi wa metric, kupatuka koyambira kwa H ndi h ndi ziro. Kupatuka koyambira kwa G ndikobwino, ndipo kupatuka koyambira kwa E, F ndi G ndikolakwika.
H ndiye ulusi wamba wololerana wamba, womwe nthawi zambiri sugwiritsidwa ntchito ngati zokutira pamwamba, kapena wosanjikiza woonda kwambiri wa phosphating. G Kupatuka koyambira pazochitika zapadera, monga zokutira zokhuthala, zomwe sizimagwiritsidwa ntchito kawirikawiri.
g amagwiritsidwa ntchito kupaka 6-9um zokutira zopyapyala, ngati zojambulira zofunikira ndi mabawuti a 6h, ulusi wopukutira usanayambe kutengera 6g kulolerana bandi.
Kuphatikizika kwabwino kwa ulusi wokwanira H/g, H/h kapena G/h, kwa mabawuti, mtedza ndi ulusi wina woyengedwa bwino, muyezo womwe umalimbikitsa 6H/6g wokwanira.
3. Kulemba ulusi
Magawo akuluakulu a geometric a ulusi wodzibowolera komanso kudzipangira okha
1. M'mimba mwake waukulu / wakunja (d1) : m'mimba mwake wa silinda yongoganizira yokhala ndi zingwe zopindika. Kuchuluka kwa ulusi kumayimira kukula kwake mwadzina kwa ulusiwo.
2. Njira yapansi/m'mimba mwake (d2) : m'mimba mwake mwa silinda yongolingalira kumene pansi pa ulusiwo amadutsana.
3. Kutalikirana kwa mano (p) : kumatanthauza mtunda wa axial pakati pa nsonga ziwiri zoyandikana za mano apakatikati. Mu dongosolo la ufumu, mtunda wa pakati pa mano umasonyezedwa ndi chiwerengero cha mano pa inchi (25.4mm).
Zotsatirazi zikutchula za mtunda wa mano (metric) Chiwerengero cha mano (inchi)
1) Metric kudzigunda:
Zofotokozera: ST 1.5, S T1.9, S T2.2, S T2.6, S T2.9, S T3.3, S T3.5, S T3.9, S T4.2, S T4.8, S T5.5, S T6.3, S T8.0, S T9.5
Mtunda wa mano: 0.5, 0.6, 0.8, 0.9, 1.1, 1.3, 1.3, 1.3, 1.4, 1.6, 1.8, 1.8, 2.1, 2.1
2) mano aku Britain odziguguda okha:
Zofotokozera: 4#, 5#, 6#, 7#, 8#, 10#, 12#, 14#
Nambala ya mano: AB mano 24, 20, 20, 19, 18, 16, 14, 14
Dzino A 24, 20, 18, 16, 15, 12, 11, 10
Nthawi yotumiza: Oct-08-2022