Kwimizi-mveliso yeemoto zangoku, i-aerospace, kunye ne-electronics, i-spot welding (I-Resistance Spot Welding, RSW) ibe yiteknoloji ebalulekileyo yokudibanisa isinyithi ngenxa yokusebenza kwayo kunye nokuthembeka.
Nangona kunjalo, xa i-spot welder ijongene nokudityaniswa kwezinto ezinobunzima obungalinganiyo, imiceli mngeni yobugcisa iyenyuka. Ukuqinisekisa ukuba ishiti elibhityileyo alitshi ngelixa ishiti elishinyeneyo lifezekisa udibaniso olwaneleyo ngundoqo ekuvavanyeni umgangatho wenkqubo ye-welding.
Eli nqaku liza kuhlalutya nzulu ezona ngxaki zintlanu zingundoqo zobugcisa ekuhlangabezene nazo xa imathiriyeli ye-welding enobunzima obungalinganiyo kwaye yazise ukuba abawedi banamhlanje bafikelela njani kwi-{0}}i-weld ezikumgangatho ophezulu ngeenkqubo eziphambili kunye nolawulo lweparameter.
1. Ukungalingani kokusasazwa kobushushu kunye ne "Shunting Effect": Umngeni oPhambili kuMgangatho weWeld
Umceli mngeni osisiseko kwizinto ze-welding zobunzima obungalinganiyo bulele kukungalingani okunzima kokusasazwa kobushushu.
Ubunzima obungundoqo: Ukugxininiswa kobushushu kunye nesiphumo sokuvala
NgokoMthetho kaJoule ($ Q=I^2Rt $), ubushushu be-welding buhambelana ngokuthe ngqo kwisikwere sangoku, ukuchasana, kunye nexesha. Kwindibaniselwano yobukhulu obungalinganiyo:
- 1.Ukuxinana kobushushu: Icwecwe elibhityileyo linokumelana okuphantsi noko, kodwa ngenxa yomthamo walo omncinci wobushushu, ubushushu buqokelelana ngokulula, bufike ngokukhawuleza kwindawo yokunyibilika, bukhokelela ekutshiseni{1}}ngokungena okanye ngokunzulu.
- I-2.Shunting Effect: Xa amabala amaninzi e-welded okanye kukho ukugqithiswa kwinqanaba le-workpiece, i-current iya kukhetha indlela yokunciphisa. Kwimathiriyeli yobungqingqwa obungalinganiyo, umsinga unokudlula indawo yewelding ecetywayo, utyhutyhe kwiindawo ezisele zenziwe okanye{2}}indawo eziqhagamshelwe kakuhle, okukhokelela ekungoneleni kwangoku kwindawo yewelding, nto leyo ebangela ukungonelanga kobungakanani benugget okanye ukudityaniswa okunganelanga.
Izisombululo zangoku: Multi{0}IiPulse kunye noLawulo lweSlope
Abashiseli bangoku bajongana nalo mngeni ngolawulo oluchanekileyo lwangoku:
- 1.Multi -I-Pulse Welding: Inkqubo ye-welding yahlulwe yangamanqanaba amaninzi afana nokufudumeza kwangaphambili, ukunyibilika, kunye nokwenza. Le ndlela isebenzisa i-pulse yangoku encinci yokufudumeza, ilandelwa yi-pulse yangoku enkulu yokunyibilika, kwaye ekugqibeleni isantya esincinci sokulawula ukupholisa. Oku kulungelelanisa ngokufanelekileyo ukuqokelelwa kobushushu kwiphepha elibhityileyo kunye nokungena kobushushu kwiphepha elishinyeneyo.
- 2.Ulawulo lwe-Slope yangoku: Endaweni yokusebenzisa owona mandla uphezulu ngoko nangoko, i-current yandiswa ngokuthe ngcembe (i-upslope) kwaye iyancipha (i-downslope) ngexesha elimiselweyo. Oku kunciphisa ngokufanelekileyo i-spatter kwaye kunika ixesha elide lokungena kobushushu kwizinto ezityebileyo, ukufikelela kwintsimi yobushushu obufanayo.
2. I-Nugget Shift kunye neMfezeko yoLwakhiwo: Umngcipheko we-Asymmetrical Strength
I-weld nugget ngundoqo wokomelela kwe-spot weld joint. Kwimathiriyeli yobunzima obungalinganiyo, ukubunjwa kwe-nugget kuthanda ukuthanda icala lezinto ezibhityileyo, okukhokelela kumandla adibeneyo asymmetrical.
Ubunzima obungundoqo: Ubungakanani beNugget kunye noLawulo lokuNgena
I-nugget efanelekileyo kufuneka ihanjiswe ngokufanayo kuwo omabini amaphepha kwaye ifikelele kubukhulu obaneleyo. Imigangatho yeshishini ngokuqhelekileyo ifuna i-nugget diameter ($D $) ibe kuluhlu lwe-$4\\sqrt{t}$ukuya kwi-$5\\sqrt{t}$ (apho i-$t$ bubunzima beshiti elibhityileyo, ngeemilimitha) .
Kwi-welding yobunzima obungalinganiyo, kuba ishiti elibhityileyo lifikelela kubushushu obunyibilikayo ngokulula, i-nugget itshintshela kwiphepha elibhityileyo, elikhokelela ku:
- UkuNgenelwa kwePhepha eliNcinci ngokuBanzi: Izinga lokungena elingaphaya kwe-80% liwenza buthathaka ngokumandla ukomelela kwephepha elibhityileyo, oko kunokubangela ukutshisa{1}}.
- UkuNgenelwa kwePhepha eliThikhileyo: Izinga lokungena elingaphantsi kwe-20% libonisa ukudityaniswa okungaphelelanga, okukhokelela kumandla adibeneyo angekho mgangathweni.
Izisombululo zale mihla: Uxinzelelo oluLungileyo kunye nexesha
- I-Electrode Force Optimization: Ukwandisa ngokufanelekileyo amandla e-electrode (uxinzelelo) kunokunyusa ukuzinza kokuxhatshazwa koqhagamshelwano kunye nokunceda ukugxila okwangoku kwi-interface. Uxinzelelo oluphuculweyo lulawula ngcono ukuguqulwa kwephepha elincinci.
- Ulawulo lwexesha lokuwelda oluchanekileyo: Ukwandisa ixesha le-welding kunceda ukunyusa ubunzulu obunyibilikayo kwishiti elishinyeneyo, kodwa kufuneka ilawulwe ngokungqongqo ukuthintela ubushushu-indawo echaphazelekileyo (HAZ) ekwandiseni kunye nesitshizi esigqithisileyo. Ngokomzekelo, xa u-welding 0.8mm kunye ne-1.4mm sheet sheets, ixesha elide lokuwelda lidla ngokusetyenziswa ukuqinisekisa ubunzulu bokunyibilika okwaneleyo kwiphepha le-1.4mm.
3. IiNdleko zokuKhawuleliswa kwe-Electrode kunye noLondolozo: Umthwalo ofihlakeleyo wokuSebenza
Ii-electrode ze-welding ze-spot ziyinto esetyenziswayo, kwaye izinga lokunxiba likhawuleza kakhulu xa izinto zokuwelda ezinobunzima obungalinganiyo.
Ubunzima obungundoqo: Uxinzelelo oluphezulu kunye nokungaBhayisiki okuFanayo-kuThermal
- Uxinaniso oluPhezulu lwangoku: Ukuhlawulela ukungabikho kobushushu kwiphepha elishinyeneyo, ii-welding currents eziphezulu zihlala zifunwa, ezixhomekeke ngokuthe ngqo kwi-electrode tip kwimithwalo ephezulu ye-thermal kunye noxinano lwangoku.
- -I-Uniform Thermal Cycling: Amazinga okufuduswa kobushushu bamashiti abhityileyo kunye ashinyeneyo ayahluka, nto leyo eyenza -ibhayisikile eshushu engaqhelekanga kumacala omabini encam ye-electrode, kukhawulezisa ukuthamba kunye ne-oxidation yemathiriyeli ye-electrode.
Ukunxiba kwe-Electrode kukhokelela kwindawo yokunxibelelana okwandisiweyo kunye nokuncipha koxinzelelo lwangoku, nto leyo echaphazela umgangatho we-nugget, idala umjikelo okhohlakeleyo.
Izisombululo zanamhlanje: Izinto eziPhezulu kunye neNgqoko ezenzekelayo
- Uphuculo lweMathiriyeli ye-Electrode: Ukusetyenziswa ngokubanzi komgangatho ophezulu-ophezulu,{1}}uphezulu{1}}izinto zokuqhuba ezifana neChromium Zirconium Copper (CuCrZr) ukuphucula ukuxhathisa kokunxiba kwe-electrode kunye -nobushushu bokuthomalalisa.
- I-Automated Electrode Dressing: Ukuqaliswa kwee-electrode dressers ezizenzekelayo kuvumela ukucuthwa ngokuchanekileyo kwencam ye-electrode esekelwe kwi-weld count count okanye iziphumo zokuhlola umgangatho. Oku kuqinisekisa ukuzinza kwendawo yoqhagamshelwano ye-electrode, ukugcina ukuxinana okungaguqukiyo ngoku, kunye nokunciphisa kakhulu-indleko zokusebenza kwexesha elide.
4. IiMfuno ezintsonkothileyo zokuSebenzisa iParameter: IShift ukusuka kumava ukuya kubukrelekrele
Kwimathiriyeli yobukhulu obungalinganiyo, indlela yemveli "yokulinga{0}}kunye{1}}nempazamo" yokusebenzela iparameter ingasebenzi kakuhle kwaye ixabisa kakhulu.
Ubunzima obungundoqo: -Ukudibanisa okuGuquguqukayo kunye nefestile yeNkqubo emxinwa
I-Spot welding ibandakanya iiparameters ezintathu ezingundoqo (okwangoku, ixesha, uxinzelelo) kunye nezinto ezininzi eziguquguqukayo ezifana nomlinganiselo wezinto eziphathekayo kunye nemeko yomphezulu. Ubukhulu obungalinganiyo benza unxulumano oludityanisiweyo phakathi kwezi ziguquguqukayo zibenzima ngakumbi, okukhokelela kwifestile yeNkqubo emxinwa kakhulu{1}uluhlu lweeparamitha ezivelisa i-weld eyamkelekileyo.
| Ipharamitha | Izinto eziThina (umzekelo, 0.8mm) | Izinto ezityebileyo (umz., 1.4mm) | Ukudibanisa ukutyeba okungalinganiyo (0.8mm{1}}mm) | Isicwangciso soPhuculo |
| I-Welding yangoku | Ngasezantsi | Phezulu | Ifuna ibhalansi, ngokuqhelekileyo iphezulu kancinane kunokufuneka kwiphepha elibhityileyo | Sebenzisa ezininzi-iPulse okanye iSlope Control |
| Ixesha le-Welding | Mfutshane | Ixesha elide | Ifuna ukwandiswa ukuqinisekisa ukungena kweshiti elishinyeneyo | Ulawulo oluchanekileyo ukuya kuma-milliseconds |
| I-Electrode Force | Phakathi | Phakathi | Inyuswe kancinci ukuzinzisa ukuchasana noqhagamshelwano | Qinisekisa uqhagamshelwano oluqinileyo phakathi kwamaphepha amabini |
Qinisekisa uqhagamshelwano oluqinileyo phakathi kwamaphepha amabini
- Iinkqubo zolawulo oluguquguqukayo: Abashiseli bangoku baxhotyiswe{0}}ngexesha lokwenyani iinkqubo zokubeka iliso ezilandelela imiqondiso efana nombane, okhoyo, kunye nokususwa kwe-electrode ngexesha lenkqubo yokuwelda. Ii-algorithms zilungelelanisa ngokuguquguqukayo i-welding yangoku ukuqinisekisa ukuba igalelo lamandla elisetiweyo liyafezekiswa kwi-weld nganye, ngaloo ndlela soyisa ukuguquguquka okungephi kubunzima bezinto okanye imeko yomphezulu.
- Uvimba weDatha weParameter: Ukuseka uvimba wedatha-othile, oqinisekisiweyo osemgangathweni wesiseko sobukhulu obuqhelekileyo (umzekelo, 1.0mm{4}}mm) uvumela abaqhubi ukuba bafowunele useto ngokuthe ngqo, bashenxise inkqubo yolungiselelo ukusuka kwi{5}}ulungiso lwesayithi ukuya kulawulo lwedatha.
5. Umngcipheko owandisiweyo wokuphazamiseka kwe-Welding: Umngeni woxinzelelo lwe-Thermal kunye ne-Residual Stress
-Unikezelo olulinganayo loxinzelelo lwe-thermal ngoyena nobangela wotshintsho lweworkpiece (warpage).
Ubunzima obungundoqo: Ukushisa kakhulu kwendawo kunye nokuNxibelela ngoxinzelelo
Kwiwelding engalinganiyo yobunzima, ukufudumeza kwendawo kwindawo yeshiti elicekethekileyo kubi kakhulu, kwaye nesantya sokupholisa sikwakhawuleza, okukhokelela ku:
- Alulo-Uxinzelelo lwe-Thermal olufanayo: Ukupholisa ngokukhawuleza kwenza uxinzelelo olukhulu kwindawo yeshiti.
- Uxinaniso lweResidual Stress: Olu{0}}olufanayo loxinzelelo lokucutheka lugxininisa intsalela yoxinzelelo kwindawo yeweld. Xa uxinezeleko ludlula amandla emveliso yezinto, lubangela uguquko olukhulu lwe-workpiece.
Izisombululo zanamhlanje: Ukulandelelana kwe-Welding kunye noYilo lokuLungisa
- Ulandelelwano lwe-Welding eLungelweyo: Ukusebenzisa ipateni ye-welding edibeneyo okanye i-welding ye-skip inqanda ukufudumeza okuqhubekayo kweendawo ezikufutshane, ukuvumela i-workpiece ixesha elaneleyo lokuchitha ubushushu. Ukubeka phambili ukuwelda kwamacandelo atyebileyo okanye azinzileyo kunceda ukulawula ukonakala ngokubanzi.
- Ulungiso oluchanekileyo kunye nokuBekwa kweNdawo: Ukusebenzisa{0}}ubulukhuni obuphezulu,-izilungiso ezichanekileyo ezichanekileyo ukuze ufumane indawo ethembekileyo kwaye unyanzelise i-workpiece. Ukulungiswa kufuneka kube neepropati ezilungileyo zokutshatyalaliswa kobushushu ukuncedisa ekulawuleni ukusabalalisa ukushisa, ukunciphisa ukufuduka kunye nokuguqulwa ngexesha lenkqubo ye-welding.
Isiphelo: Ukusuka kuMngeni ukuya kuQhagamshelo oluthembekileyo
Undoqo wezixhobo zokuwelda ezinobunzima obungalinganiyo bulele ekulinganiseni ukuhanjiswa kobushushu kunye nokuphumeza ulawulo lwenkqubo oluchanekileyo.
Ngokuzisa ezininzi-i-pulse welding, i-adaptive control yangoku, i-automated electrode dressing, kunye nogcino-lwazi olusemgangathweni lweparamitha, itekhnoloji yale mihla ye-welding ithe yalungisa le mingeni.
Ngolawulo lwenkqubo yezenzululwazi kunye noqwalaselo oluphambili lwezixhobo, abavelisi abanakuphucula kakhulu kuphela umgangatho we-weld kunye nokuthembeka okuhlangeneyo kodwa banciphise ngempumelelo iindleko zokusebenza zexesha elide{0}}, ukuqinisekisa uqhagamshelo olusebenzayo noluzinzileyo kwiimeko ezintsonkothileyo zemveliso.
