Pambuyo pazaka zambiri zopanga makina, simukudziwa tanthauzo la wononga, sichoncho?
Gawo la magwiridwe antchito a ma bolts olumikizira kapangidwe kachitsulo amagawidwa m'makalasi opitilira 10, kuphatikiza 3.6,4.6,4.8,5.6,6.8,8.8,9.8,10.9,12.9.Mabawuti a kalasi 8.8 ndi kupitilira apo amapangidwa ndi chitsulo chochepa cha carbon alloy kapena sing'anga kaboni chitsulo ndi kutentha kutentha (kuzimitsa, kutentha), komwe kumadziwika kuti ma bawuti amphamvu kwambiri, ndipo ena onse amatchedwa mabawuti wamba.Chizindikiro cha giredi la bawuti chimakhala ndi magawo awiri a manambala, motsatana, zomwe zimayimira mphamvu yamphamvu yokhazikika komanso kuchuluka kwamphamvu kwa bawuti.
Bolts of performance grade 4.6, kutanthauza:
Mphamvu yodziwika bwino ya bawuti imafika pamlingo wa 400MPa;
Chiŵerengero cha mphamvu ya flexion ya zinthu za bawuti ndi 0,6;
Mphamvu zokolola mwadzina za bawuti zimafika pamlingo wa 400 × 0.6 = 240MPa.
Magwiridwe kalasi 10.9 mkulu mphamvu mabawuti, amene zinthu pambuyo kutentha mankhwala, akhoza kufika:
Mphamvu yodziwika bwino ya bawuti imafika pamlingo wa 1000MPa;
Chiyerekezo champhamvu cha flexion cha bawuti ndi 0,9;
Mphamvu yotulutsa mwadzina ya bawuti imafika pamlingo wa 1000 × 0.9 = 900MPa.
Tanthauzo la kalasi ya bolt ndi muyezo wapadziko lonse lapansi, kalasi yofananira ya bawuti, mosasamala kanthu za kusiyana kwa zinthu zake ndi chiyambi chake, ntchito yake ndi yofanana, kapangidwe kake kakhoza kusankha gawo la magwiridwe antchito.
Magiredi amphamvu 8.8 ndi 10.9 ndi ma bolt shear stress rating ya 8.8GPa ndi 10.9GPa
8.8 Mwadzina kumakokedwe mphamvu 800 N/MM2 Mwadzina zokolola mphamvu 640 N/MM2
Ma bolt onse amagwiritsidwa ntchito ndi ” X. Y ” akuwonetsa mphamvu, X * 100= kulimba kwa bawuti iyi, X * 100 * (Y / 10) = mphamvu yotulutsa bawuti iyi (monga momwe zalembedwera: kutulutsa mphamvu / mphamvu yolimba =Y / 10)
Kwa kalasi 4.8, kulimba kwa bawuti ndi 400MPa;mphamvu zokolola ndi 400 * 8 / 10 = 320MPa.
Komanso: zitsulo zosapanga dzimbiri nthawi zambiri zimalembedwa kuti A4-70, mawonekedwe a A2-70, tanthauzo lake limafotokozedwa mosiyana.
kuyeza
Utali padziko lapansi makamaka uli ndi magawo awiri a kuyeza, imodzi ndi metric system, unit of measurement for metres (m), cm (m) (cm), mm (mm), etc., mu boma, China ndi Japan ndi zina kum'mwera chakum'mawa kwa Asia ntchito kwambiri, wina ndi British, wagawo muyeso makamaka mainchesi (inchi), lofanana ndi wakale mzinda udindo, mu United States, United States ndi mayiko ena a ku Ulaya ndi America ntchito zambiri.
Muyezo wa Metric: (10 mex) 1m = 100 cm = 1000 mm
Muyezo wa ku Britain: (8 r) 1 inchi =8 mailosi 1 inchi =25.4 mm 3/8??×25.4 =9.52
1/4 ??Zinthu zotsatirazi zimawerengedwa kuti ziwonetse mayina awo, monga: 4 #, 5 #, 6 #, 7 #, 8 #, 10 #, 12 #
screw thread
Ulusi ndi mawonekedwe okhala ndi yunifolomu yozungulira yozungulira pachigawo chakunja kapena chamkati cha cholimba.Malinga ndi mawonekedwe ake komanso ntchito zake, zitha kugawidwa m'magulu atatu:
Ulusi wamba: mawonekedwe a dzino istriangleShape, omwe amagwiritsidwa ntchito polumikiza kapena kumangirira zigawozo.Ulusi wamba umagawidwa m'magulu awiri a mano okhwima ndi ulusi wamano abwino malinga ndi phula, ndipo mphamvu yolumikizira ya ulusi wabwino wa dzino ndi wapamwamba.
Kufala ulusi: dzino mawonekedwe ali trapezoidal, amakona anayi, macheka ndi makona atatu, etc.
Ulusi wosindikiza: womwe umagwiritsidwa ntchito posindikiza, makamaka ulusi wa chitoliro, ulusi wa cone ndi ulusi wa chubu.
Kugawa ndi mawonekedwe
Wopangidwa ndi grade
Ulusi wokwanira ndi kukula kwa lotayirira kapena zolimba pakati pa wononga ulusi, ndi mlingo woyenera ndi otchulidwa kuphatikiza kupatuka ndi kulolerana pa ulusi mkati ndi kunja.
1. Pa ulusi wogwirizana wa ku Britain, pali magulu atatu a ulusi wakunja: 1A, 2A ndi 3A, ndipo pali magulu atatu: 1B, 2B ndi 3B, onse omwe ali ofanana ndi kusiyana.Kukwera kwa chiwerengero cha msinkhu, kumagwirizana kwambiri.Mu ulusi waku Britain, zopatuka zimangotchula magiredi 1A ndi 2A okha, magiredi 3A ndi ziro, ndipo magiredi 1A ndi 2A ndi ofanana.Kuchuluka kwa magiredi, kumachepetsa kulolerana.
Kalasi 1A ndi 1B, kulekerera kotayirira kwambiri, koyenera kulolerana ndi ulusi wamkati ndi wakunja.
Kalasi 2A ndi 2B ndi makalasi ambiri olekerera ulusi omwe amatchulidwa pamndandanda waku Britain wa zomangira zamakina.
Gulu la 3A ndi 3B, lomwe limapanga tighfit zomangira zolimba zomangira chitetezo.
Kwa ulusi wakunja, 1A ndi 2A ali ndi kulekerera kwa mating ndipo 3A alibe.1A kulolerana ndi 50% yaikulu kuposa kulekerera kwa 2A ndi 75% yaikulu kuposa kulekerera kwa 3A.Kwa ulusi wamkati, kulolerana kwa 2B ndi 30% yayikulu 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 miyeso itatu ya ulusi: 4h, 6h ndi 6g, ulusi wamkati uli ndi miyeso itatu ya ulusi: 5H, 6 H, 7H. mulingo wa II) mu ulusi wa metric, kupatuka koyambira kwa H ndi h ndi ziro.Kupatuka kwakukulu kwa G ndi kovomerezeka, ndipo kwa e, f, ndi g ndikolakwika.
H ndiye ulusi wamkati womwe umagwiritsidwa ntchito kwambiri, womwe nthawi zambiri sugwiritsidwa ntchito ngati zokutira pamwamba, kapena ndi wosanjikiza woonda kwambiri wa phosphating.Kupatuka koyambira kwa G kumagwiritsidwa ntchito pazochitika zapadera, monga zokutira zokhuthala, zomwe sizimagwiritsidwa ntchito kawirikawiri.
Chophimba chopyapyala cha g chimagwiritsidwa ntchito poyala 6-9um.Monga momwe kujambula kwazinthu kumafunikira bawuti ya 6h, ulusi wothiramo umatengera bandi yololera ya 6g isanachitike.
Ulusi wokwanira umaphatikizidwa bwino mu H / g, H / h kapena G / h.Kwa ulusi wa zomangira zoyengedwa monga ma bolts ndi mtedza, 6H / 6g yokwanira ndiyofunikira.
3. Zikhomo za ulusi
Zigawo zazikulu za geometric zodziwombera nokha ndi ulusi wodzibowolera
1. M'mimba mwake waukulu / m'mimba mwa dzino lakunja (d1): silinda yongopeka ya denga la ulusi.Ulusi waukulu wa ulusi umayimira m'mimba mwake mwadzina wa kukula kwa ulusi.
2. Njira / m'mimba mwake (d2): m'mimba mwake wa silinda wongoyerekeza wokhala ndi ulusi wolumikizana.
3. Mtunda wa mano (p): mtunda wa axial wa mano oyandikana ndi mfundo ziwiri pa mzere wa meridian.Pa chiwerengero cha mano mkati mwa inchi iliyonse (25.4mm).
Common range (metric) (Chingerezi)
(1) Metric self-attack mano:
Zofotokozera: ST 1.5, S T1.9, S T2.2, S T2.6, S T2.9, ndi ST3.3, S T3.5, S T3.9, S T4.2, S T4.8, S T5.5, ST6.3, 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) Dongosolo laku Britain la mano odziwombera:
Kufotokozera: 4 #, 5 #, 6 #, 7 #, 8 #, 10 #, 12 #, 14 #
Nambala ya mano: AB mano 24,20,20,19,18,16,14,14
A mano 24,20,18,16,15,12,11,10
Nthawi yotumiza: Aug-19-2022