Intsimbi yegalvanized isetyenziswa kakhulu kwimveliso yeemoto, izixhobo zasekhaya, iikhabhathi zokugcina amandla, i-switchgear, kunye neendawo ezivaliweyo zentsimbi ngenxa yokumelana nokugqwesa kwayo okugqwesileyo kunye nokubumba kakuhle. Nangona kunjalo, xa kuziwa ekuchaseniukuwelda indawo, intsimbi ekhandisiweyo ikwabizwa ngokuba yenye yezona zinto zinzima ukuwelda rhoqo.
Iingxaki eziqhelekileyo ezifana ne-spatter egqithisileyo, i-weld nuggets engazinzanga, i-porosity, i-electrode sticking, kunye nobomi obufutshane be-electrode buhlala busenzeka kwimigca yemveliso. Abashiseli beendawo ze-AC bemveli bahlala besokola ukulungelelanisa amandla kunye nozinzo phantsi kwezi meko. Xa kuthelekiswa, i-MFDC (Medium Frequency DC) indawo ye-welder iye yaba sisisombululo esithandwayo se-galvanized steel welding ngenxa yolawulo lwangoku oluphezulu kunye nokusebenza kakuhle kwamandla.
Ukuzuza ngokuzinzileyo,{0}}amandla aphezulu, kunye{1}nomgangatho ophantsi we-spatter welds kwiintsimbi ezenziwe ngamagalvanized, akwanelanga ukuxhomekeka kwisixhobo kuphela. Ukuqonda okupheleleyo kokuziphatha okubonakalayo, isicwangciso separameter ye-welding, kunye nomgangatho wenkqubo kubalulekile.
Kutheni le nto iNtsimbi yeGalvanized Kunzima Ukuyibona iWeld?
Ubunzima be-welding yensimbi ene-galvanized ikakhulu ivela kwiimpawu ezibonakalayo ze-coating ye-zinc. Ezi zinto zine zichaza uninzi lweziphene ze-weld ezibonwa kwimveliso:
- Indawo yokubilisa ephantsi ye-zinc
I-Zinc ingumphunga malunga ne-907 degree, ngelixa intsimbi inyibilika ngaphezu kwe-1450 degree. Ngexesha le-welding, i-zinc iqhuma kakhulu ngaphambi kokuba intsimbi inyibilike. Ukuba umphunga we-zinc awukwazi ukubaleka kakuhle, ubangela isiphala esinobundlobongela kunye ne-porosity yangaphakathi.
- I-conductivity ephezulu ye-thermal kunye nokuchasana kombane okuphantsi kwe-zinc layer
I-coating ye-zinc isasaza ubushushu kude ne-welding zone, okwenza kube nzima ukugxininisa amandla kwindawo edibeneyo. Oku kudla ngokukhokelela kwii-weld nuggets ezibuthathaka okanye ezingahambelaniyo.
- Ukupholisa ngokukhawuleza kwe-weld nugget
I-Zinc ikhawuleza ukutshatyalaliswa kobushushu, ibangela ukuba i-nugget iqine ngaphambi kokukhula ngokupheleleyo, okunciphisa amandla omatshini.
- Ukungcoliseka okukhulu kwe-electrode
Umphunga weZinc unamathela ngokulula kwincam ye-electrode, ebangela ukuqhutywa kwangoku okungazinzanga, ukuncamathela kwe-electrode, kunye nokunxiba rhoqo. Kwiifektri ezininzi, ubomi be-electrode bunokufinyezwa ngo-40-60% xa u-welding izinto ezenziwe ngamagalvanized.
Ngaphandle kolawulo olululo lwenkqubo, izinga lesiphako sokuwelda indawo yentsimbi inokufikelela ngokulula kwi-8% -15%, echaphazela kakhulu imveliso kunye nokuthembeka kwemveliso.
NgobaMFDC Spot WeldersYenza Ngcono Kwintsimbi yeGalvanized (Uthelekiso lweDatha)
Isizathu sokuba i-MFDC abashiseli bamabala basebenze ukodlula abashiseli bemveli be-AC ilele kwabo-imveliso yamaxesha amaninzi, akukho qanda wangoku-ukunqumla, kunye nolawulo oluchanekileyo lwangoku. Iinzuzo zicaca kakhulu xa zithelekiswa ecaleni:
| Into |
AC Spot Welder |
MFDC Spot Welder | Impembelelo kwiNtsimbi yeGalvanized |
| Ubuninzi bemveliso
|
50/60 Hz | 800-2000 Hz | Ubushushu obuphezulu=ukufudumeza okuqhubekayo |
| Indlela yamaza yangoku
|
Sine wave | Kufuphi{0}}isikweri samaza | Ukwakheka kwe-nugget okuzinzileyo |
| Iqanda lokuwela
|
Kucacile | Phantse akukho nanye | Iphelisa ukuphazamiseka kobushushu |
| Ukusebenza kakuhle kwe-Thermal
|
Ngasezantsi | 15–25% ngaphezulu | Ukulahleka okuncinci kobushushu nge-zinc |
| Ukuchaneka kolawulo lwangoku
|
±8–10% | ±1–2% | Ukuhambelana okungcono kakhulu |
| Ulawulo lwe-spatter
|
I-avareji | 30–50% isitshizi esingaphantsi
|
Imbonakalo ye-weld ecocekileyo |
| Ukuhambelana okuzenzekelayo
|
Ilinganiselwe | Egqwesileyo | Ilungele i-EV kunye nemigca yokuvelisa ibhetri |
Kufuphi:
Ukudityaniswa kwefrikhwensi ephezulu, eqhubekayo yangoku, kunye nolawulo oluchanekileyo luvumela i-MFDC ye-welder ukuba isombulule ngokuthe ngqo iintlungu ezintathu zentsimbi ye-galvanized welding{0}}i-spatter, ii-nuggets ezibuthathaka, kunye nokungahambi kakuhle.
I-Core Logic ye-Welding Parameters: "Ukususwa kweZinc-Nugget Formation-Solidification"
Impazamo eqhelekileyo kwiifektri ezininzi kukunyusa nje i-welding yangoku xa umgangatho wentsimbi yentsimbi uphantsi. Ngokwenyani, oku kuhlala kukhokelela kwi-spatter enzima, ukunxiba ngokukhawuleza kwe-electrode, kunye nokungaguquguquki okubi ngakumbi. Eyona mbambano ayingowo onke amandla ngokwawo, kodwa indlela loo mandla akhululwa ngayo ekuhambeni kwexesha.
Inkqubo yewelding esebenzayo yentsimbi ekhandiweyo ilandela-inqanaba lengqiqo yobushushu obuthathu:
Inqanaba lakwangoko – I-zinc vaporization elawulwayo
Igalelo lokushisa eliphakathi elidityaniswe namandla afanelekileyo e-electrode ivumela i-zinc layer ukuba ibe ngumphunga kwaye ibaleke ngendlela elawulwayo.
Inqanaba eliphakathi - Ukuqulunqwa kwe-nugget yensimbi ngokukhawuleza
Amandla agxininisiweyo akha i-nugget etyhidiweyo ezinzileyo kwisiseko sentsimbi.
Inqanaba lokugqibela - Ixesha elaneleyo lokubamba ukuqinisa
Uxinzelelo lokubamba olongeziweyo luqinisekisa ubume be-nugget exineneyo ngexesha lokupholisa.
Ubukhulu beshiti eliqhelekileyo le-0.5-1.5 mm, ukulungiswa okucetyiswayo xa kuthelekiswa nentsimbi ethambileyo ngokuqhelekileyo:
- Umjelo we-welding wehliswe nge-20-30%
- Ixesha le-welding lifinyezwe nge-10-20%
- Ixesha lokubamba linyuke nge-15–25%
Okubaluleke ngokulinganayo yimeko yomphezulu. Amashiti e-oyile, i-oxidized coatings, okanye i-electrode engcoliseke kakhulu inokuchasa ngokupheleleyo useto lweparameter echanekileyo.
Ixesha elide -Uzinzo lweNkqubo yeXesha luxhomekeke kuLawulo oluQhelekileyo lwe-Welding
Nokuba zinezixhobo zokuwelda indawo ze-MFDC, iifektri ezininzi zisenamava okuguquguquka komgangatho phakathi kweeshifti okanye iibhetshi zemveliso. Kwiimeko ezininzi, unobangela asikokukwazi kwezixhobo, kodwa kukunqongophala komgangatho wenkqubo yokwenyani.
- Okokuqala, iiparamitha ze-welding kufuneka zitshintshe ukusuka "kumava omqhubi" ukuya kwiifestile zenkqubo esisigxina. Ubukhulu bephepha obuhlukeneyo kunye neentlobo zokugquma kwe-zinc zifuna iiparitha ezicacileyo ezicacileyo ukuba akufanele zilungiswe ngokukhululekileyo.
- Okwesibini, ii-electrodes kufuneka zilawulwe njengento esetyenziswayo ngesicwangciso somjikelo wobomi-kunokutshintshwa kuphela emva kokusilela. Ungcoliseko oluqhubelekayo kunye nokunxiba ngokuthe ngcembe kuthoba umgangatho we-weld ixesha elide ngaphambi kokuba i-electrode ibonakale "yonakele."
- Okokugqibela, -uhlolo lokuqala kwaye{1}}kwinkqubo yokubeka iliso yenze olona khuselo lusebenzayo ngokuchasene nokusilela kwebhetshi. Uvavanyo lokutsalwa, ukuhlolwa kobungakanani be-nugget, kunye nolawulo lwe-SPC lunceda ukufumanisa ukuqhutywa kweeparamitha, imeko ye-electrode, okanye ukugquma kwempahla ngaphambi kokuba iziphene zisasazeke.
Ukuququmbela:
Ukuwelda indawo yentsimbi ezinzileyo ayifumanekanga ngomatshini omnye, kodwa ngenkqubo epheleleyo edibanisa iiparamitha, i-electrodes, kunye nolawulo lomgangatho.
Ukuqukumbela
Intsimbi eyenziwe ngegalvanized ithathwa njengento enzima ukuweld kuba i-zinc iphuphuma kwangoko, isasaze ubushushu ngokukhawuleza, icuthe ifestile yokwenziwa kwe-nugget, kwaye ingcolisa i-electrode kwiqondo lobushushu eliphezulu. Ezi mpawu zenza iindlela zokuwelda ezirhabaxa, zemveli zingazinzi ngokwendalo.
Umtshisi wendawo weMFDCyenza ifestile yewelding elawulekayo ngokuphezulu{0}}imveliso yamaxesha amaninzi, i-DC ezinzileyo, kunye nolawulo oluchanekileyo lwamandla. Xa zidityaniswe nolawulo lweparamitha yenzululwazi, ulawulo olululo lwe-electrode, kunye neenkqubo zokuvelisa ezisemgangathweni, ukuwelda indawo yentsimbi ekhandisiweyo iguqula isuka kumthombo osisiphene ibe yinkqubo yokuvelisa ezinzileyo, eyoyikisayo.
