babelane ngeziphumo zophando oluneenkcukacha olwenziwe yinkampani oluthelekisa iibha eziqinileyo ze-Inconel 625 kunye neebha ezintsha ze-Sanicro 60 ezingenanto.
I-Inconel 625 yodidi olukhuphisanayo (inombolo ye-UNS N06625) yi-superalloy esekwe kwi-nickel (i-superalloy engatshisi ubushushu) esetyenziswe kumashishini aselwandle, enyukliya nakwamanye amashishini ukususela ekuphuhlisweni kwayo kokuqala ngeminyaka yoo-1960 ngenxa yeempawu zayo ezinamandla aphezulu kunye nokumelana namaqondo obushushu aphezulu. Inokhuselo olongezelelekileyo ngokuchasene nokugqwala kunye ne-oxidation.
I-Challenger entsha yinguqulelo ye-hollow-rod ye-Sanicro 60 (ekwaziwa ngokuba yi-Alloy 625). I-hollow core entsha ye-Sandvik yenzelwe ukubonelela ngokusebenza okungcono kwiindawo ezithile ezihlala i-Inconel 625, eyenziwe nge-alloy ye-nickel-chromium enamandla aphezulu enokumelana namaqondo obushushu aphezulu kakhulu kwiindawo ezine-chlorine. Iyamelana nokugqwala kwe-intergranular kunye nokugqwala koxinzelelo, ine-Pitting Resistance Equivalency (PRE) engaphezulu kwama-48.
Injongo yolu phononongo yayikukuvavanya ngokupheleleyo nokuthelekisa ukusebenza kakuhle kweSanicro 60 (ububanzi = 72 mm) kunye ne-Inconel 625 (ububanzi = 77 mm). Iikhrayitheriya zovavanyo bubomi besixhobo, umgangatho womphezulu kunye nolawulo lweetships. Yintoni eya kugqama: iresiphi entsha yebar engenanto okanye ibar epheleleyo yendabuko?
Inkqubo yovavanyo eSandvik Coromant eMilan, e-Itali inamacandelo amathathu: ukujika, ukubhoboza kunye nokuthepha.
IZiko lokuSebenza eliQokelelweyo le-MCM (i-HMC) lisetyenziselwa uvavanyo lokubhola nokuthepha. Imisebenzi yokujika iza kwenziwa kwiMazak Integrex Mach 2 kusetyenziswa izibambi zeCapto ezine-coolant yangaphakathi.
Ubomi besixhobo buvavanywe ngokuvavanya ukuguguleka kwesixhobo kwisantya sokusika esiqala kwi-60 ukuya kwi-125 m/min kusetyenziswa uhlobo lwe-alloy ye-S05F efanelekileyo ekugqityweni kwesiqingatha kunye nokurhawuzelelwa. Ukulinganisa ukusebenza kovavanyo ngalunye, ukususwa kwezinto ngesantya sokusika ngasinye kulinganiswa ngeendlela ezintathu eziphambili:
Njengesinye isilinganiselo sokukwazi ukusebenza, ukwakheka kweetshiphusi kuyavavanywa kwaye kujongwe. Abavavanyi bavavanya ukuveliswa kweetshiphusi kwii-inserts zejiyometri ezahlukeneyo (iMazak Integrex 2 esetyenziswe ne-PCLNL holder kunye ne-CNMG120412SM S05F turning insert) ngesantya sokusika se-65 m/min.
Umgangatho womphezulu ujongwa ngokweekhrayitheriya ezingqongqo: uburhabaxa bomphezulu wesixhobo somsebenzi akufuneki budlule kwiRa = 3.2 µm, Rz = 20 µm. Kufuneka zingabi nangcangcazelo, ukuguguleka, okanye imiphetho eyakhiweyo (BUE – ukwakheka kwezinto kwizixhobo zokusika).
Uvavanyo lokubhoboza lwenziwe ngokusika iidiski ezininzi kwintonga efanayo engama-60 mm eyayisetyenziselwa uvavanyo lokujika. Umngxuma owenziwe ngomatshini wabhobozwa ngokuhambelana nomgca wentonga kangangemizuzu emi-5 kwaye ukuguguleka komphezulu ongasemva wesixhobo kwakubhalwa phantsi rhoqo.
Uvavanyo lokufaka imisonto luvavanya ukufaneleka kweSanicro 60 engenanto kunye ne-Inconel 625 eqinileyo kule nkqubo ibalulekileyo. Zonke imingxuma eyenziwe kuvavanyo lwangaphambili lokubhola isetyenzisiwe kwaye yasikwa ngetephu yentambo yeCoromant M6x1. Ezintandathu zafakwa kwiziko loomatshini elithe tyaba le-MCM ukuze kuvavanywe iindlela ezahlukeneyo zokufaka imisonto kwaye kuqinisekiswe ukuba zihlala ziqinile kulo lonke umjikelo wokufaka imisonto. Emva kokufaka imisonto, linganisa ububanzi bomngxuma ophumayo nge-caliper.
Iziphumo zovavanyo bezicacile: Iibhari ezingenanto ezingama-60 zeSanicro zisebenze ngcono kune-Inconel 625 eqinileyo, ziphila ixesha elide kwaye zigqibele ngcono kumphezulu. Zikwafana neebhari eziqinileyo xa zenza iitshiphusi, zibhoboza, zicofa kwaye zicofa kwaye zisebenze kakuhle ngokulinganayo kwezi mvavanyo.
Ubomi benkonzo yeebhari ezingenanto ngesantya esiphezulu bude kakhulu kuneebhari eziqinileyo kwaye bude ngaphezu kwezihlandlo ezithathu kuneebhari eziqinileyo ngesantya sokusika se-140 m/min. Ngesi santya siphezulu, ibhari eqinileyo yahlala imizuzu emi-5 kuphela, ngelixa ibhari engenanto yayinobomi besixhobo semizuzu eli-16.
Ubomi bezixhobo zeSanicro 60 buhlala buzinzile njengoko isantya sokusika sisanda, kwaye njengoko isantya sisanda ukusuka kumaxesha angama-70 ukuya kwi-140 m/min, ubomi bezixhobo behle nge-39% kuphela. Oku bubomi bezixhobo obufutshane ngama-86% kune-Inconel 625 ngotshintsho olufanayo lwesantya.
Umphezulu we-Sanicro 60 hollow rod blank uthambile kakhulu kunowe-solid Inconel 625 rod blank. Oku kubini kukungakhethi cala (uburhabaxa bomphezulu abudluli kwi-Ra = 3.2 µm, Rz = 20 µm), kwaye kulinganiswa ngomphetho obonakalayo, imikhondo yokungcangcazela okanye umonakalo kumphezulu ngenxa yokwenziwa kwee-chips.
I-shank engenanto ye-Sanicro 60 yenze okufanayo ne-shank eqinileyo ye-Inconel 625 endala kuvavanyo lokufaka imisonto kwaye ibonise iziphumo ezifanayo ngokubhekiselele ekugugulekeni kwe-flank kunye nokwakheka kwe-chip ephantsi emva kokubhoboza.
Iziphumo zixhasa ngamandla ukuba iintonga ezingenanto ziyindlela ephuculweyo endaweni yeentonga eziqinileyo. Ubomi bezixhobo bude ngokuphindwe kathathu kunokhuphiswano ngesantya esiphezulu sokusika. I-Sanicro 60 ayihlali ixesha elide kuphela, ikwasebenza kakuhle, isebenza nzima kwaye ikhawuleza ngelixa igcina ukuthembeka.
Ngokufika kwemarike yehlabathi enokhuphiswano ekhuthaza abaqhubi boomatshini ukuba bajonge ixesha elide utyalo-mali lwabo lwezinto eziphathekayo, amandla eSancro 60 okunciphisa ukuguguleka kwezixhobo zoomatshini ayimfuneko kwabo bafuna ukwandisa amathuba kunye namaxabiso emveliso akhuphisanayo. Oku kuthetha lukhulu.
Ayizukuhlala ixesha elide nje kuphela umatshini kwaye utshintsho luyancitshiswa, kodwa ukusebenzisa umbindi ongenanto kunokuthintela yonke inkqubo yokwenziwa, kuthintele isidingo somngxuma osembindini, nto leyo enokonga ixesha elininzi kunye nemali.