Indlela yendabuko yokwenza izimbobo ze-crankshaft ukusebenzisa ithuluzi elihlangene eliyisicefe emshinini okhethekile wokucubungula. I-blade ngayinye ihambisana nendawo yokucubungula ehambisanayo ukuze uqedele umgodi we-crankshaft. Lapho ucutshungulwa, kuyadingeka ukusebenzisa ukwesekwa okusizayo kwethuluzi eliyisicefe. Le ndlela yokucubungula ngokuvamile ayisebenzi. Esikhungweni semishini. Ulayini wokukhiqiza oguquguqukayo we-cylinder block ikakhulukazi usebenzisa isikhungo somshini. Enqubweni yokucubungula yangempela, ngenxa yokuthi imbobo ye-crankshaft ingumgodi wesilinganiso esikhulu sokujula kuya kobubanzi, ubude bembobo bungaphezu kuka-400mm. Futhi, i-overhang ivame ukuba yinde, ukuqina akulungile, kulula ukubangela ukudlidliza, kunzima ukuqinisekisa ukunemba kwe-dimensional kanye nokunemba kokuma kwembobo ebhokile. Inqubo ye-U-turn boring ingaxazulula izinkinga ezingenhla kahle.

Okubizwa ngokuthi i-turning boring iyindlela ende yokwenza imbobo lapho amathuluzi enesithukuthezi kusuka ezindaweni ezimbili zokugcina zengxenye esikhungweni sokukhanda esivundlile. Inqubo yokuphenduka eyisicefe ye-workpiece iboshiwe kanye futhi itafula lizungezwa ngo-180 °. Ingqikithi yale ndlela iwukuthi Yehlisa ubude besiphakeli. I-U-turn boring igwema ukusekelwa okusizayo kanye nokuvinjelwa kwejubane lokujikeleza kwe-shaft eyisicefe, engandisa isivinini sokusika; ibha eyisicefe ine-overhang emfushane kanye nokuqina okuhle, okungathuthukisa ukunemba kwesicefe futhi ilungele abasebenzi.

Ngenxa yokuthi izimbazo zezimbobo ezimbili eziyisicefe azikwazi ukuqondana ngokuphelele ngesikhathi sokucutshungulwa, iphutha lenkomba lokuzungezisa ithebula lika-180 °, iphutha lokunyakaza kwetafula kanye nephutha lokuqondisa lokunyakaza kokuphakelayo kungaholela ngokuqondile ephutheni le-coaxiality le-axis yembobo. Ngakho-ke, ukulawula iphutha le-coaxiality le-U-turn boring kuyisihluthulelo sokulawula ukunemba kwemishini. Ukuze kuqinisekiswe ukunemba kokucubungula, ukunemba kwemishini yokucubungula idinga ukuthuthukiswa, futhi ukunemba kokubeka kanye nokunemba kokubeka okuphindaphindiwe kwe-worktable kanye ne-spindle kuyadingeka ukuba kube phezulu. Ngaphezu kwalokho, singathatha izinyathelo enqubweni yokuqeda noma ukunciphisa lezi zici ezimbi ezithinta i-coaxiality, ukuze sithuthukise ukunemba kwe-coaxiality kwe-boring ye-U-turn. Ukusebenzisa isikhungo semishini esinembayo esiphezulu nesisebenza kahle kakhulu esihlanganiswe nenqubo eyisicefe ye-U-turn ukucubungula izinhlobonhlobo zezimbobo ezinde kanye nezinhlelo ze-coaxial hole kungasizakala kangcono ngenqubo eyisicefe ye-U-turn.

Ngezimbobo ze-crankshaft ezidinga ukunemba okuphezulu komshini, ubuchwepheshe bokucubungula i-honing buyadingeka, okungukuthi, ithuluzi lizungeza emgodini we-crankshaft, futhi ukucubungula ukucija kuyaphindwa. Inqubo yokucija imi kanje: i-honing eqinile isetshenziselwa ukususa inani elisele, ukuqeda amamaki amahle ayisicefe, ukuthuthukisa ukunemba komumo wembobo, nokunciphisa ukukhahlamezeka kwendawo yomgodi; i-honing emihle isetshenziselwa ukuthuthukisa ukunemba kwe-dimensional kanye nokunemba kokwakheka kwembobo, futhi kuncishiswe ubulukhuni obungaphezulu, I-uniform cross-texture yenziwa ebusweni be-cylinder bore; i-flat-top honing isetshenziselwa ukususa iziqongo zezimpawu ze-net groove, ukwakha indawo eyisicaba, ukumisa isakhiwo senethi esiyisicaba ebusweni bomgodi, nokuthuthukisa izinga lokusekela lendawo yomgodi. Ukucijwa kwezimbobo ze-crankshaft wukucubungula okuvundlile. Uma kucatshangelwa izidingo zokunemba kwezimbobo zika-F kanye ne-B cylinder crankshaft, asikho isidingo sokucija izimbobo ze-crankshaft, futhi akukho mishini yokucija edingekayo.