Zinatenga zaka masauzande ambiri kuti zomangira zing'onozing'ono zipangidwe mpaka zitalimbitsidwa motsata wotchi ndi kumasuka motsagana ndi koloko. Kodi ufa wa golide udaganizapo za vuto, chifukwa chiyani uyenera kumangirizidwa molunjika?
Zida zisanu ndi chimodzi zosavuta zamakina ndi:Zomangira, Zophatikizika, Zomangira, Zomangira, Maweji, Magudumu, Ma Axles.
Zowonongazo zili m'gulu la makina asanu ndi limodzi osavuta, koma kunena mosapita m'mbali, ndi axis ndi ndege yokhotakhota mozungulira. Masiku ano, zomangira zapanga kukula kwake. Njira yodziwika bwino yogwiritsira ntchito screw ndi kumangitsa molunjika (mosiyana ndi counterclockwise kumasula).
Komabe, popeza zomangira pa chiyambi cha kupangidwa zonse zinapangidwa ndi manja, fineness wa zomangira sizinali zogwirizana, zomwe nthawi zambiri zimatsimikiziridwa ndi zokonda za mmisiri.
Chapakati pa zaka za m’ma 1500, katswiri wina wa zomangamanga wa ku France dzina lake Jaques Besson anatulukira njira yopangira zitsulo zomangira, ndipo luso limeneli linadzadziwika m’zaka 100 zapitazi. Mngelezi Henry Maudsley anapanga lathe yamakono mu 1797, ndipo ndi iyo, ulusi wabwino wa ulusiwo unawongoleredwa kwambiri. Komabe, palibe muyezo wofanana wa kukula ndi kuwongolera kwa zomangira.
Izi zinasintha mu 1841. Joseph Whitworth, wophunzira wa Maudsley, anatumiza nkhani ku Institute of Municipal Engineers kuyitanitsa kuphatikizidwa kwa screw models. Adapereka malingaliro awiri:
1. Kupendekera kwa ulusi wa screw kuyenera kukhala 55 °.
2. Mosasamala kanthu za kukula kwa screw, muyezo wina uyenera kutengedwa kwa chiwerengero cha mawaya pa phazi.
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Nthawi yotumiza: Apr-16-2020