Uma abantu abaningi bezwa 'i-metal shaft', babona induku elula, eqinile. Empeleni, yilapho umbono wokuqala oyiphutha ulele khona. Akukaze kube yinduku nje. Ithwala umthwalo, i-torque-transmitting, ingxenye evamise ukulingana ngokunemba ukwehluleka kwayo kungamisa wonke umugqa wokuhlanganisa. Ngibone amaphrojekthi amaningi kakhulu eyithatha njengento ethengiswayo, okuholela ekusebenzeni kabusha okubizayo. Inselele yangempela ayikho ekulenzeni; kusekucaciseni kahle zisuka nje—impahla, ukubekezelelana, ukuqeda, kanye nesici esivame ukunganakwa sengcindezi eyinsalela evela kumishini.
Ukukhetha Okubalulekile Kungaphezu Kwebanga
Ukukhetha insimbi engu-4140 noma i-304 engenasici ngoba isohlwini olujwayelekile kuyisiqalo, kodwa kuwubuwula. Indawo yokusebenza ibeka yonke into. Ngikhumbula iphrojekthi yephampu yasolwandle lapho ukucaciswa kokuqala kubize i-standard 316 engagqwali insimbi shaft. Iphumelele izivivinyo zokuqala kodwa yehluleka enkundleni ezinyangeni ezimbalwa. Inkinga? Hhayi ukugqwala okuvamile, kodwa ukugqwala koqhekeko kanye nokugqwala kwengcindezi kukhiye ngaphansi kokulayisha umjikelezo emanzini ane-chlorine. Kwadingeka sishintshele ebangeni le-duplex elingagqwali elinokumelana ne-chloride okungcono futhi silungise inqubo yomshini ukuze sivuse ingcindezi ecindezelayo phezulu. I-takeway? Inombolo yengxubevange iyithikithi lokungena.
Yilapho abahlinzeki besikhathi eside abane-Foundry kanye nemishini ngaphansi kophahla olulodwa bebonisa khona inani labo. Inkampani efana I-Qingdao Qiangsenyuan Technology Co., Ltd.(QSY), neminyaka yabo engamashumi amathathu ekulingiseni nasekukhiqizeni imishini, iyakuqonda lokhu kudlala. Abagcini nje ngomshini i-billet; zingaqala kusuka kugobolondo noma ukutshala imali, okungabaluleka kumajiyometri e-shaft ayinkimbinkimbi anama-flange noma amaphrofayili angajwayelekile. Ukulawula uhambo lwempahla ukusuka ensimbi encibilikisiwe ukuya engxenyeni eqediwe kunciphisa izingozi ezifihliwe.
Kuzinhlelo zokusebenza ezigqokwa kakhulu, njengakuma-agitators ama-slurries abrasive, sidlulele ngale kokuqina. Ukwelapha okungaphezulu njengokuqina kokungeniswa kumongo wensimbi ye-carbon noma ngisho nokusebenzisa i-Stellite (ingxubevange esekwe ku-cobalt) imbondela ye-weld ezindaweni ezithile zokugqokwa kudingekile. Ukuhlaziywa kwezindleko nenzuzo: kubiza kakhulu insimbi shaft ethatha iminyaka emithathu uma iqhathaniswa neshibhile eshintshwa njalo ngonyaka. Izindleko eziphelele zobunikazi azivamile ukuvumela inketho eshibhile.
I-Machining Finish: Lapho Imininingwane Ihlangana Namaqiniso
Umdwebo ungase ubize ukuqedwa kobuso obungu-0.8 Ra. Ukuyifinyelela kuyinto eyodwa; ukuyithola ngokuqhubekayo ekukhiqizeni ama-shafts angu-500 kungenye. Udeveli usekusetheni, ukugqokwa kwamathuluzi, nasekulawuleni okupholile. Isiphetho sesibuko singase sibukeke simangalisa, kodwa ku-shaft egijima endaweni engenalutho, udinga iphethini ethile ye-cross-hatch yokugcina uwoyela. Ubushelelezi kakhulu, futhi uzibeka engcupheni yokuthuka.
Lokhu ngikufunde kanzima emshinini wokupakisha onesivinini esikhulu. Amashafu ayepholishwe kahle aze afike ku-0.4 Ra. Bashisa ngokweqile futhi babamba kungakapheli isonto. Inkinga bekungelona inani lokuqeda ngokwalo, kodwa ukushoda kwemisele yokuthambisa echaziwe kanye nendlela yokuthungwa kwendawo engalungile. Bekufanele sikhiqize kabusha wonke amayunithi, sengeze inqubo ethile yokucija ithafa. Manje, angisho njalo i-Ra kuphela, kodwa futhi i-Rz kanye nephethini yokulala (i-circumferential, axial, noma i-cross-chatched) emdwebeni. Izitolo eziningi zemishini ejwayelekile zizokushaya indiva lokhu ngaphandle uma ukubhoboza kuzo.
Izikhungo zemishini ye-CNC, njengalezo ongazithola endaweni yokucubungula okukhethekile (isizinda sabo ku- tsngtaocnc.com imininingwane yamakhono abo), ibalulekile ekuphindaphindeni. Kodwa ulwazi lomhleli luyisihluthulelo. Ukuthi balandelanisa kanjani ukusebenza—ukuqina, ukuqeda kancane, ukuqeda—kuthinta okokufaka ukushisa kanye nokuzinza kohlangothi. Ukusikwa okusindayo okusele kwephasi yokugcina kungahlanekezela ingxenye ngemuva kokuthi ingahlanganisiwe. Ubuciko obucashile obumbozwe njengesayensi.
Umthetho Wokulinganisa: Hhayi Okwama-turbines Kuphela
Wonke umuntu uyazi ukuthi ama-turbine shafts adinga ukulinganisa okunamandla. Kodwa kuthiwani nge-shaft fan egijima ku-3000 RPM? Noma i-conveyor drive shaft engamamitha angu-3 ubude? Isidingo sokulinganisa sibukelwa phansi kakhulu. Okungalingani insimbi shaft idala ukudlidliza, okuholela ekuhlulekeni kokuthwala ngaphambi kwesikhathi, ukuguga kwezimpawu, nomsindo. Kunoma yini ezungezisayo ngenhla mayelana ne-1000 RPM, manje ngigunyaza ukucaciswa kokulinganisa, noma ngabe ibhalansi emile yamarotha ahamba kancane, aqinile.
Indlela ibalulekile. Ngokuvamile sicacisa izinga lebhalansi ye-G2.5 yemishini eminingi yezimboni. Kodwa ukuyifinyelela kudinga ukuhlela ngokucophelela. Udinga ukufana kwezinto ezibonakalayo (yingakho kubalulekile ukulingisa okuhle noma okungenalutho okufojiwe), ukwenziwa kwemishini elinganayo, nezindawo ezikhethiwe zokwengeza noma zokususa isisindo. Ngike ngabona izitolo zibhoboza izimbobo ezingahleliwe ukuze zilinganise i-shaft, okulimaza kakhulu amandla ayo okukhathala. Indlela efanele iwukuba namaphedi anomshini noma ama-flange aklanywe kusukela ekuqaleni kwezisindo zebhalansi.
Ngomphini omude, ozacile, indaba iba nzima nakakhulu. Ingahle iqonde futhi ilinganisele lapho ibanda futhi imile, kodwa ngaphansi kwesisindo sayo kanye nokwanda okushisayo ngesivinini sokusebenza, ingantenga futhi ibangele ukungalingani. Ngezinye izikhathi, awulinganisi i-shaft yedwa, kodwa yonke inhlangano ye-rotor. Lokhu kudinga ukusebenzisana nomakhi wemishini ukuze kuhlinzekwe amajenali okulinganisa nokuqonda ukulandelana komhlangano.
Ukubekezelelana Nokulingana: Ulimi Lomhlangano
Ububanzi be-shaft obungama-50mm. Kusho ukuthini lokho? Akukho lutho ngaphandle kokubekezelelana. Ukulingana kwe-h7 kwesihlalo esithwalayo, i-k6 yokulinganisa kwegiya, i-f7 yendawo egijimayo yophawu. Ukwenza lokhu ngendlela engalungile kuyindlela eshesha kakhulu eya ekuhlulekeni komhlangano. Ngake ngathola inqwaba yamashafu lapho amajenali ane-bearing ashintshwa abe yi-g6 tolerance esikhundleni sika-h7. Kwakungcono (okuqinile) ukubekezelelana, kodwa kwakusho ukuthi ama-bearings, asevele ecindezelekile, acishe angenakwenzeka ukufaka ngaphandle komshini we-hydraulic, obeka ingozi.
Esinye isici esibalulekile ukubekezelelana kwejometri: ubuqotho, isilinda, nokugxila. Ishafu ingaba nawo wonke ububanzi ku-spec kodwa ibe nokugoba okungu-0.1mm ngaphezu kobude bayo. Lokhu kuzodala ukuphela, ukudlidliza, nokuguga okungalingani. Kumashafti abalulekile, manje sihlala sicacisa i-callout yokuqondisa, ngokuvamile ngaphezu kwe-span 500mm. Ukuhlola lokhu kudinga ama-V-blocks afanelekile kanye nenkomba yokudayela, hhayi nje ama-caliper.
Lokhu kunemba yilapho izinsiza ezididiyelwe zikhokha khona. Inkampani ephethe kokubili ukusakazwa kwe-close-net-shape kanye nemishini yokugcina ye-CNC, njenge-QSY, inokulawula okungcono kulokhu. Bangakwazi umshini izindawo ezibucayi zedatha ekusakazeni kuqala, bese besebenzisa lezo ukuze babambe ingxenye ukuze benze imisebenzi elandelayo, baqinisekise ukugxila kanye nokunemba kwendawo kusukela ekuqaleni. Ukuzama ukubamba indawo eqinile ukuze kwenziwe imishini yokuqeda kuyiresiphi yokungaguquguquki.
Lapho I-Shaft Ingaqinile: Imigodi Engenalutho nezici Zangaphakathi
Akuwona wonke ama-shaft anemigoqo eqinile. Amashafu angenalutho abalulekile ekwehlisweni kwesisindo (kwi-aerospace noma izinhlelo zokusebenza zezimoto) noma ekusebenzeni njengamapayipi okupholisa, uketshezi olunamanzi, noma izintambo. Lokhu kwethula isethi entsha yezinselele. Ukwenza ibhore ejulile, enobubanzi obuncane enokuqina okuqinile kanye nezidingo zokuqeda phezulu kuwumsebenzi okhethekile. Ukuchezuka kwamathuluzi, ukuphuma kwe-chip, nokulethwa kokupholisa kuba yikhanda elikhulu.
Sakhe umgodi ongenalutho insimbi shaft ngesicelo se-rotary union. I-bore yangaphakathi idinga ukuqedwa kwe-1.6 Ra kanye nokugxila okunembayo namajenali anezimpawu zangaphandle. Umhlinzeki wethu wokuqala wazabalaza nengxoxo yebha eyisicefe, eshiya isiphetho esibi. Isixazululo siqhamuke kuchwepheshe bemishini ophakamise ukuthi kusetshenziswe ibha yephuzu elilodwa eyisicefe enejiyomethri ethile kanye nesistimu yokupholisa ye-high-pressure through-tool ukuze kuphuke ama-chips nokudambisa ukudlidliza. Isebenzile, kodwa bekuyinqubo eyakhiwe ngokuzama nangephutha, hhayi ukusebenza okujwayelekile.
Ngomshini onjalo wangaphakathi oyinkimbinkimbi, izinqubo ezifana nokubhoboza izibhamu zivame ukusetshenziswa. Ukusebenza okunensayo, okunembayo. Lesi isibonelo esihle salapho udinga khona isitolo esinezinto ezikhethekile ezifanele kanye nesineke sokudayela inqubo. Akuwona umsebenzi onevolumu ephezulu, oshintsha ngokushesha. Ukhokhela ubungcweti nekhono, hhayi nje isikhathi somshini.
Isici Esikhohliwe: Izingcindezi Ezinsalela Nokuzinza Kwesikhathi Eside
Lokhu kungase kube isici esinganakwa kakhulu ngokwezinga insimbi shaft ukukhiqiza. Ukucupha, ikakhulukazi ukuphenduka noma ukugaya okunolaka, kwethula izingcindezi ezinsalela kungqimba olungaphezulu. Lezi zingcindezi zingakhululeka ngokuhamba kwesikhathi, okubangela ukuthi i-shaft igobe kancane. Ngomshini ojwayelekile wokuthutha, kungase kungabi nandaba. Ukuze uthole ukuphotha okunembayo ethuluzini lomshini, kuyinhlekelele.
Sibe nenqwaba yamaphinifa omshini wokugaya aphumelele kukho konke ukuhlola kokuqala kwe-QC. Ngemva kokuhlala endaweni yokugcina izinyanga eziyisithupha, cishe u-30% wabo wabonisa ukuphuma okulinganiselwe. Umlandu? Ukucindezelwa okuyinsalela okuvela ekugayeni, kuhlanganiswe nento (insimbi yethuluzi) engakhululwanga ngokwanele ukucindezeleka ngaphambi komshini wokugcina. Ukulungiswa kwakuwukusebenzisa inqubo yokuguga yezinga lokushisa eliphansi (ngezinye izikhathi ebizwa ngokuthi ukuguga kokwenziwa) ngemva kokuqeda ukugaya ukuze kusheshiswe ukukhululeka kwengcindezi ngaphambi kokuhlolwa kokugcina.
Ukulawula lokhu kudinga indlela yokukhiqiza ephelele. Ukuqala ngento engenalutho ephethwe ngokushisa kahle (ehlanganisiwe, ijwayelekile, noma ecishiwe futhi ethukuthele) isinyathelo sokuqala. Khona-ke, ukukhanda kufanele kwenziwe ngezigaba ngokukhululeka kwengcindezi phakathi kwezingxenye ezibucayi. Umhlinzeki wesevisi egcwele ophethe lonke iketango—kusukela ekutholeni ingxubevange elungile, ukuya ekubumbeni/ukufoja, ukwelapha ukushisa, nokwenza imishini yokugcina—ubekwe endaweni engcono kakhulu yokulawula lezi ziguquguqukayo. Kungumehluko phakathi kokwenza ingxenye esebenza ngosuku eyenziwe kanye nesebenza ngokwethembeka iminyaka.
