Zithini iiTekhnoloji zokuWelda eziPhambili?
Uphuhliso lwesayensi netekhnoloji luye lwaqhuba inkqubela phambili eqhubekayo kubuchwepheshe bokutywina, nto leyo ekhokelele ekuveleni kweendlela ezintsha zokudibanisa. Iiteknoloji zokudibanisa eziphambili zibhekisa kwiindlela zokudibanisa eziphambili ngaphaya kwezo ziqhelekileyo (ezifana nokutywina i-arc yesinyithi esikhuselweyo, ukutywina i-arc engaphantsi komhlaba, kunye nokutywina i-arc yesinyithi esiqhelekileyo segesi). Ukuvela kunye nophando lwezi ndlela zokudibanisa eziphambili zivela ekuhlanganisweni kwezifundo ezahlukeneyo. Iiteknoloji zokudibanisa eziphambili (umz., ukutywina i-beam enamandla aphezulu, ukutywina i-laser-arc hybrid, ukutywina i-vacuum diffusion, kunyeukuwelda kwerobhothi) zisetyenziswe kwizixhobo ze-elektroniki, amandla, iimoto, i-aerospace, imboni yenyukliya, kunye namanye amacandelo. Zidlala indima ebalulekileyo nengenakutshintshwa ekudibaniseni izixhobo kunye nezakhiwo ezikhethekileyo, zikhuthaza inkqubela phambili kwezentlalo nezobuchwepheshe.
Ukudityaniswa kwezinto eziphucukileyo kunxulumene kakhulu nophuhliso lobuchwepheshe obuphezulu kwaye kunemisebenzi eyahlukileyo nengenakutshintshwa. Emva kophuhliso olukhawulezileyo kwinkulungwane yama-20, iteknoloji yokudityaniswa, njengekhonkco elibalulekileyo kushishino lwanamhlanje, ingene kwinkulungwane yama-21 ngenkqubo evuthiweyo, itshintsha ukusuka ekuvelisweni kwezandla ukuya ekuvelisweni ngoomatshini, okwenziwa ngokuzenzekelayo, okusekelwe kulwazi, kunye nokwenziwa ngobuchule. Oku kubonisa ixesha elitsha kwisayensi yokudityaniswa kwezixhobo kunye nobunjineli.
(1) Ukuwelda kweLaser-Arc Hybrid
Itekhnoloji yokucubungula imisebe enamandla aphezulu idunyiswa njengetekhnoloji yokucubungula ethembisayo kakhulu kwinkulungwane yama-21, ekholelwa ukuba “izisa utshintsho olukhulu kwitekhnoloji yokucubungula izinto kunye nokuvelisa,” kwaye okwangoku yeyona ntsimi yobugcisa ekhula ngokukhawuleza kwaye iphandwe kakhulu.
Uphuhliso lweizixhobo zokuweldaUkubhekisa kubukhulu becala kuneentsingiselo ezimbini: enye kukwanda kwamandla ezixhobo, kwaye enye kukwandiswa kweendawo ezidityaniswe zizixhobo. Ngenxa yotyalo-mali olukhulu oluqhutywa kube kanye kwizixhobo zokudibanisa eziphucukileyo, ngakumbi izixhobo zokudibanisa i-laser kunye ne-electron beam welding, ukonyusa amandla, ukuphucula ubunzulu bokungena kunye nokuzinza kwenkqubo yokudibanisa kunokunciphisa iindleko zokudibanisa, okwenza ukuba kwamkeleke kushishino. Ke ngoko, iteknoloji yokudibanisa i-hybrid egxile kwi-laser itsale ingqalelo. Enyanisweni, ukudityaniswe kwe-laser-arc hybrid kwacetywayo kwasekuqaleni kweminyaka yoo-1970, kodwa izicelo ezizinzileyo zoshishino zavela kwiminyaka yakutshanje, ikakhulu zixhamla kuphuhliso lwetekhnoloji ye-laser kunye nezixhobo zokudibanisa i-arc, ngakumbi ukuphuculwa kwamandla e-laser kunye netekhnoloji yokulawula i-arc. I-Laser-arc hybrid ibandakanya kakhulu indibaniselwano ye-laser kunye ne-tungsten inert gas (TIG) arc, i-plasma arc, kunye ne-arc esebenzayo. Ngokusebenzisana phakathi kwe-laser kunye ne-arc, iziphene zendlela nganye yokudibanisa zinokoyiswa, nto leyo ekhokelela kwisiphumo esihle se-hybrid.
Ukuwelda kwe-laser-arc hybrid kuphucula kakhulu ukusebenza kakuhle kokuwelda, ikakhulu ngokusekelwe kwiziphumo ezimbini: okokuqala, uxinano lwamandla aphezulu lukhokelela kwisantya esiphezulu sokuwelda kunye nokunciphisa ukulahleka kobushushu kwesixhobo somsebenzi; okwesibini, isiphumo se-superposition sokusebenzisana phakathi kwemithombo emibini yobushushu. Xa kuwelda intsimbi, i-laser plasma izinzisa i-arc; kwangaxeshanye, i-arc ingena kumngxuma we-keyhole yedama elinyibilikisiweyo, inciphisa ukulahleka kwamandla. Ukudibana kwe-laser kunye ne-TIG kunokunyusa kakhulu isantya sokuwelda, malunga nesibini kunesokuwelda kwe-TIG. Ukuguguleka kwe-tungsten electrode nako kuncitshiswa kakhulu, okwandisa ubomi bayo benkonzo; i-angle ye-groove nayo ingancitshiswa kakhulu, kwaye indawo ye-weld cross-sectional ifana neyokuwelda kwe-laser. Xa kuthelekiswa nokuwelda kwe-laser-single arc hybrid, ukuwelda kwe-laser-double arc hybrid kunokunciphisa igalelo lobushushu lokuwelda ngama-25% kwaye konyuse isantya sokuwelda malunga nama-30%.
Iingenelo eziphambili ze-laser-arc (okanye i-plasma arc) hybrid welding kukuphucula isantya se-welding kunye nobunzulu bokungena. Ngenxa yokufudumeza i-arc, ubushushu bentsimbi buyanyuka, kunciphisa ukuqaqamba kwesinyithi kwi-laser kwaye kwandisa ukufunxwa kwamandla okukhanya. Le ndlela ivavanyiwe kwi-CO₂ laser welding enamandla aphantsi, kunye ne-12kW CO₂ laser welding kunye ne-2kW YAG lasers ene-optical fiber transmission, ibeka isiseko se-robotic laser-arc (okanye i-plasma arc) hybrid welding. Kwiminyaka yakutshanje, iteknoloji ye-hybrid welding ezelwe yi-laser-arc hybrid ifikelele kuphuhliso olukhulu, kwaye ukusetyenziswa kwayo kwiindawo ezintsonkothileyo kwi-aerospace, emkhosini, nakwamanye amacandelo kuye kwafumana ingqwalasela ekhulayo. Okwangoku, iteknoloji ye-hybrid welding edibanisa i-high-energy beams kunye ne-arcs ezahlukeneyo iye yaba yenye yezona ndawo ziphambili kwicandelo le-high-energy beam welding.
(2) Ukuwelda ngeFriction Stir
I-Friction Stir Welding (FSW) yiteknoloji yokuwelda enelungelo lobunikazi eyaphuhliswa yi-Welding Institute (TWI) yase-United Kingdom ekuqaleni kweminyaka yoo-1990. Ingawelda iintsimbi ezingezizo iintsimbi ekunzima ukuziwelda kusetyenziswa iindlela zokuwelda ezidityanisiweyo.
Ukuwelda ngefriction stir kuneengenelo ezifana nenkqubo elula yokudibanisa, iinkozo ezincinci kwijoyinti edibeneyo, ukusebenza kakuhle kokudinwa, ukusebenza kakuhle kokutsalwa, kunye nokusebenza kokugoba, akukho mfuneko yeengcingo zokuwelda okanye iigesi zokukhusela, akukho kukhanya kwe-arc, kunye noxinzelelo oluphantsi kunye nokuguquguquka emva kokuwelda. Kuye kwasetyenziswa kushishino lweenqwelo-moya kumazwe aphuhlileyo eYurophu naseMelika, kwaye kusetyenziswe ngempumelelo ekuwelda izitya zoxinzelelo ezixineneyo ze-aluminium alloy ezisebenza kumaqondo obushushu aphantsi, kugqibezela ijoyinti ethe tye yee-welds ezinde kunye nejoyinti ejikelezayo yee-welds ezijikelezayo. Le teknoloji yamkelwe kuyilo olutsha lwezakhiwo zezithuthi ezintsha kwaye yasetyenziswa kwi-aerospace, ezothutho, kwimveliso yeemoto, nakwamanye amacandelo emizi-mveliso.
(3) Ukuwelda kweVacuum Diffusion
Ukuvela okuqhubekayo kwezinto eziphambili kuvelisa imingeni emitsha kwiteknoloji yokudibanisa. Ukudibanisa izinto ezininzi ezintsha, ezifana nee-alloys ezimelana nobushushu, ii-ceramics zobuchwepheshe obuphezulu, ii-intermetallic compounds, kunye nezinto ezidityanisiweyo, ingakumbi ukudibana kwezinto ezahlukeneyo, kunzima ukukufezekisa kusetyenziswa iindlela ze-fusion welding zesiqhelo, ngoko ke kuye kwavela i-solid-state diffusion bonding kunye nezinye iiteknoloji. Umzekelo, iteknoloji ye-superplastic forming-diffusion welding isetyenziswe ngempumelelo kwizakhiwo ze-titanium alloy honeycomb zeenqwelo-moya. Ii-ceramics kunye neesinyithi zinokudityaniswa nge-diffusion welding; ukusetyenziswa kweteknoloji ye-transient liquid phase diffusion welding kusombulule iingxaki ezininzi ezinzima zokudibanisa izinto ezinzima ezingenakusonjululwa yiukuwelda kwe-fusionmandulo.
Ukudibanisa i-Solid-state kunokwahlulwahlulwa kube ziindidi ezimbini. Enye yindlela yokudibanisa enobushushu obuphantsi, uxinzelelo oluphezulu, kunye nexesha elifutshane, nto leyo ekhuthaza ukudibana okusondeleyo komphezulu we-workpiece kunye nokuqhekeka kwefilimu ye-oxide ngenxa yokuguqulwa kweplastiki yendawo. Ukuguqulwa kweplastiki yeyona nto iphambili ekwenzeni i-joint. Ezi ndlela zokudibanisa ziqukaukuwelda kokungqubana, ukuwelda ngokuqhuma, ukuwelda ngoxinzelelo olubandayo, kunye nokuwelda ngoxinzelelo olushushu, okuqhele ukubizwa ngokuba kukuwelda ngoxinzelelo. Enye yindlela yokudibanisa ngobushushu obuphezulu, uxinzelelo oluphantsi, kunye nexesha elide, edla ngokwenziwa kwindawo ekhuselekileyo okanye kwi-vacuum. Le ndlela yokudibanisa ivelisa kuphela ukuguquguquka okuncinci kweplastiki, kwaye ukusasazeka kwe-interface yeyona nto iphambili ekwakhiweni kwejoyinti. Iindlela ezinjalo zokudibanisa ziquka ukuwelda ngoxinzelelo, okufana nokuwelda ngoxinzelelo, ukuwelda ngoxinzelelo lwe-transient liquid phase, ukuwelda ngoxinzelelo olushushu oluyi-isostatic, kunye nokuwelda ngoxinzelelo oluphezulu.
Ukongeza ekuveleni okuqhubekayo kweendlela zokudibanisa eziphucukileyo kunye neenkqubo ezintsha (ezi zingentla zimbalwa nje imizekelo), inqanaba loomatshini kunye nokuziqhelanisa kweendlela ezahlukeneyo zokudibanisa lihlala liphucuka. Inkqubela phambili yetekhnoloji ye-elektroniki, itekhnoloji yokuva, ikhompyutha, kunye netekhnoloji yokulawula ikhuthaze kakhulu uphuhliso lwesifundo sokudibanisa, okwenza ukuziqhelanisa kwe-welding kuhambele kulawulo olukrelekrele. Ngokukodwa, ukungeniswa okukhulu kweerobhothi zokudibanisa kuye kwadlula kwindlela yendabuko yokudibanisa eqinileyo, kwavula indlela entsha yokwenza izinto ngokuzenzekelayo eguquguqukayo ekudibaniseni, kwaye kwabonelela ngendawo ebanzi yophuhliso lwetekhnoloji yokudibanisa. Ukudibanisela kuye kwaba yindlela yokucubungula ebalulekileyo kwimveliso yanamhlanje. Ngaphezu koko, ngenkqubela phambili yesayensi netekhnoloji kunye nophuhliso lwentlalo noqoqosho, amasimi okusetyenziswa kokudibaniselana okuphucukileyo/ukudibanisa aya kuqhubeka esanda.
(4) Ukuwelda okwenziwa ngokuzenzekelayo nangobukrelekrele
Ukwenziwa kwemishini kunye nokuzisebenzela ngokuzenzekelayo zizinto ezibalulekileyo zokuphucula imveliso yokuwelda, ukuqinisekisa umgangatho wemveliso, kunye nokuphucula iimeko zokusebenza. Ukuzisebenzela ngokuzenzekelayo kwemveliso yokuwelda yindlela yophuhliso lwexesha elizayo lwetekhnoloji yokuwelda. Ukuphucula ukusebenza kakuhle kunye nomgangatho wemveliso yokuwelda kunemida ethile kuphela ngokwembono yeenkqubo zokuwelda. Iindlela zokuwelda/zokudibanisa ezifana nokuwelda nge-electron beam, ukuwelda nge-laser, kunye nokuwelda nge-friction stir zinemfuno ezingqongqo kwi-groove geometry kunye nomgangatho wokuhlanganisa. Emva kokuwelda ngokuzenzekelayo, lonke ulwakhiwo oluweldayo lucocekile, luchanekile, kwaye luhle, lutshintsha imeko yokusebenza ngesandla kwiindawo zokusebenzela zokuwelda ngaphambili.
Njengenye yeempawu ezibalulekileyo zophuhliso lwetekhnoloji yokuvelisa yanamhlanje kunye nomzi-mveliso wetekhnoloji osakhulayo, iirobhothi zibe nefuthe elibalulekileyo kwiinkalo ezahlukeneyo zamashishini akumgangatho ophezulu. Ubunzima beenkqubo zokwenza ii-welding kunye neemfuno ezingqongqo zomgangatho we-welding, kunye nenqanaba letekhnoloji ye-welding elihlala liphantsi kunye neemeko zokusebenza, zenza iinkqubo ze-welding ezinokwenza inkqubo ye-welding ibe yeyokuzenzekelayo kwaye iqondeke zifumane ingqwalasela ekhethekileyo. Okwangoku, ama-30% ukuya kuma-40% eerobhothi kwihlabathi liphela asetyenziswa kubuchwepheshe be-welding. Iirobhothi ze-welding ekuqaleni zazisetyenziswa kakhulu kwimigca yemveliso ye-welding ethe tyaba kwishishini leemoto, kwaye kwiminyaka yakutshanje, ziye zanda kancinci kancinci zaya kwezinye iindawo zemveliso.
Ingqwalasela yokuqala yophuhlisoukuwelda okukrelekreleyinkqubo yokubona. Iinkqubo zokubona eziphuhliswe ngoku zinokwenza iirobhothi zikwazi ukutshintsha ngokuzenzekelayo indlela yokuhamba kwetotshi ngokweemeko ezithile ngexesha lokuwelda, kwaye ezinye zinokulungisa iiparameter zenkqubo ngexesha elifanelekileyo ngokobukhulu bomngxuma.
Ixesha leposi: Agasti-20-2025
