Kugawa kwa ma bulldozer, fakitale ya unyolo wa ma bulldozer aku India
Crawler dozer (yomwe imadziwikanso kuti crawler dozer) idapangidwa bwino ndi Benjamin Holt, waku America, mu 1904. Idapangidwa poika bulldozer yonyamula ndi manja patsogolo pa thirakitala yonyamula ndi manja. Panthawiyo, mphamvu inali injini ya nthunzi. Pambuyo pake, ma crawler dozer oyendetsedwa ndi mphamvu ya gasi wachilengedwe ndi injini ya petulo adapangidwa. Tsamba la bulldozer linapangidwanso kuchokera pakukweza ndi manja mpaka kukweza chingwe cha waya. Benjamin Holt analinso m'modzi mwa omwe adayambitsa Caterpillar Inc. ku United States. Mu 1925, Holt Manufacturing Company ndi C 50. Best Bulldozer Company adagwirizana kuti apange Caterpillar Bulldozer Company, kukhala wopanga woyamba padziko lonse lapansi wa zida za bulldozer, ndipo adayambitsa bwino gulu loyamba la ma bulldozer 60 okhala ndi injini za dizilo mu 1931. Ndi kupita patsogolo kosalekeza kwa ukadaulo, bulldozer yakhala ikuyendetsedwa ndi injini za dizilo, ndipo tsamba la bulldozer ndi scarifier zonse zimakwezedwa ndi masilinda a hydraulic. Kuwonjezera pa ma bulldozer a mtundu wa crawler, palinso ma bulldozer a mtundu wa matayala, omwe amatsatira zaka khumi kuposa ma bulldozer a mtundu wa crawler. Ma bulldozer a Crawler ali ndi mphamvu yogwira bwino ntchito ndipo amatha kugwira ntchito bwino, kotero mitundu ndi kuchuluka kwa zinthu zawo kunyumba ndi kunja ndizochulukirapo kuposa za ma bulldozer a matayala. Padziko lonse lapansi, Caterpillar ndi kampani yayikulu kwambiri yopanga makina padziko lonse lapansi. Ma bulldozer ake a caterpillar akuphatikizapo D3-D11 yayikulu, yapakatikati ndi yaying'ono, D11 RCD yayikulu kwambiri, ndipo mphamvu ya injini ya dizilo imafika 634kw; Komatsu, kampani yaku Japan, inali yachiwiri. Mu 1947, idayamba kuyambitsa ndikupanga ma bulldozer a D50 crawler. Pali ma bulldozer 13 osiyanasiyana, kuyambira D21-D575, yaying'ono kwambiri ndi D21, mphamvu ya injini ya dizilo ya flywheel ndi 29.5kw, yayikulu kwambiri ndi D575A-3SD, ndipo mphamvu ya injini ya dizilo ya flywheel ndi 858kw. Ndi bulldozer yayikulu kwambiri padziko lonse lapansi pakadali pano; Wopanga bulldozer wina wapadera ndi Liebheer Group of Germany. Ma bulldozer ake onse amayendetsedwa ndi hydrostatic pressure. Pambuyo pa zaka zoposa khumi za kafukufuku ndi chitukuko, ukadaulo uwu unayambitsa prototype mu 1972. Mu 1974, unayamba kupanga ma bulldozer a PR721-PR731 ndi PR741 hydrostatic crawler. Chifukwa cha kuchepa kwa zigawo za hydraulic, mphamvu yake yayikulu ndi 295Kw yokha, ndipo chitsanzo chake ndi PR751 minerals.
Opanga ma bulldozer atatu omwe ali pamwambapa akuyimira ma bulldozer apamwamba kwambiri padziko lonse lapansi masiku ano. Opanga ena akunja opanga ma bulldozer akunja, monga John Deere, Case, New Holland ndi Dreista, nawonso ali ndi ukadaulo wapamwamba wopanga. Fakitale ya unyolo wa ma bulldozer ku India
Kupanga ma bulldozer ku China kunayamba pambuyo pa kukhazikitsidwa kwa New China. Poyamba, bulldozer idayikidwa pa thirakitala yaulimi. Ndi chitukuko cha chuma cha dziko, kufunikira kwa ma bulldozer apakati ndi akulu m'migodi yayikulu, malo osungira madzi, malo opangira magetsi ndi madipatimenti oyendera kukuchulukirachulukira. Ngakhale kuti makampani opanga ma bulldozer apakati ndi akulu ku China apita patsogolo kwambiri, sangathenso kukwaniritsa zosowa za chitukuko cha zachuma cha dziko. Chifukwa chake, kuyambira 1979, China yakhala ikuyambitsa ukadaulo wopanga, kufotokozera njira, miyezo yaukadaulo ndi machitidwe azinthu za ma bulldozer ochokera ku Komatsu Company of Japan ndi Caterpillar Company of the United States. Pambuyo poti kugaya ndi kuyamwa, komanso ukadaulo wofunikira utathetsedwa, njira yomwe idalamulidwa ndi zinthu zaukadaulo za Komatsu m'zaka za m'ma 1980 ndi 1990 idakhazikitsidwa. Fakitale ya unyolo wa ma bulldozer aku India idapangidwa.
Kuyambira m'ma 1960, pakhala opanga pafupifupi anayi mumakampani opanga ma bulldozer am'nyumba. Chifukwa chake ndichakuti zofunikira pakukonza zinthu za bulldozer ndizokwera, zovuta zake ndi zazikulu, ndipo kupanga kwakukulu kumafuna ndalama zambiri. Chifukwa chake, mabizinesi wamba safuna kuchita nawo mosavuta. Komabe, ndi chitukuko cha msika, kuyambira "Ndondomeko ya Zaka Zisanu ndi Zisanu", mabizinesi ena akuluakulu ndi apakatikati ku China ayamba kugwiritsa ntchito ma bulldozer nthawi imodzi malinga ndi mphamvu zawo, monga Inner Mongolia No.1 Machinery Factory, Xuzhou Loader Factory, ndi zina zotero, ndikukulitsa gulu la makampani opanga ma bulldozer. Nthawi yomweyo, mabizinesi ochepa adayamba kutsika chifukwa cha kasamalidwe koyipa komanso kufunikira kosintha kuti agwirizane ndi chitukuko cha msika, ndipo ena achoka mumakampaniwa. Pakadali pano, opanga ma bulldozer apakhomo makamaka akuphatikizapo Shantui Construction Machinery Co., Ltd., Hebei Xuanhua Construction Machinery Co., Ltd., Shanghai Pengpu Machinery Factory Co., Ltd., Tianjin Construction Machinery Factory, Shaanxi Xinhuang Industrial Machinery Co., Ltd., Yituo Construction Machinery Co., Ltd., ndi zina zotero. Kuwonjezera pa kupanga ma bulldozer, makampani omwe ali pamwambawa adayambanso kupanga zinthu zina zamakina omangira, monga Shantui, yomwe imapanganso ma road roller, ma grader, ma excavator, ma loaders, ma forklift, ndi zina zotero. Fakitale ya bulldozer yaku India
Nthawi yotumizira: Sep-21-2022
