Umatshini wokuwelda indawobaye baba sisixhobo esibalulekileyo kwimveliso yesinyithi yanamhlanje, ngakumbi kwimizi-mveliso yeemoto kunye nokuchaneka kwe-elektroniki, ngenxa yokusebenza kwayo okuphezulu, ukuchaneka, kunye nomgangatho ophezulu we-weld.
Nangona kunjalo, abaninzi abaqhubi bahlala bebeka emngciphekweni iziphumo zokugqibela ze-welding ngenxa yemimiselo engafanelekanga yeparameter xa beqala ukusebenzisa umatshini okanye ukutshintsha i-workpieces. Ukulawula ukhetho oluchanekileyo lweparameter kunye nobuchule bokulungelelanisa kungundoqo wokwandisa ukusebenza kwe-MFDC welder kunye nokuqinisekisa umgangatho wemveliso.
Eli nqaku liza kubonelela -uhlalutyo olunzulu kodwa olufikelelekayo lwemilinganiselo emithathu ye-welding ye-MFDC ye-welders spot: i-Welding yangoku, i-Welding Time, kunye ne-Electrode Force, inikezela ngeengcebiso ezisebenzayo kunye neereferensi zedatha ezigunyazisiweyo.
I. Uhlalutyo lweParameter engundoqo: Izinto ezintathu eziQinisekisa umgangatho we-Weld
Inkqubo yokuwelda indawo ye-MFDC yinkqubo ye-electro{0}}eshushu{1}}yomatshini, kwaye umgangatho wayo umiselwa ngokuyintloko ezi parameters zizalanayo ezintathu.
1. I-Welding yangoku (I): "Injini" ye-Heat Generation
I-welding yangoku ngowona mthombo uphambili wokuvelisa ubushushu ngexesha le-welding kunye neyona nto ibalulekileyo echaphazela ubungakanani be-nugget kunye namandla. Medium frequency inverter technology ibonelela ngemveliso yangoku ezinzileyo kwaye ichanekile yeDC, iqinisekisa igalelo lobushushu elifanayo.
| Umba | Indlela yangoku | Isiphumo kunye neNgcebiso |
| Ukutyeba kweworkpiece | Ngokuhambelana ngokuthe ngqo nobukhulu | Amashiti atyebileyo afuna umsinga ophezulu ukuqinisekisa ubungakanani obufanelekileyo be-nugget. |
| Ukuxhathisa Izinto | Ngokuchaseneyo nokumelana nokumelana | {0}}izinto ezixhathisayo eziphakamileyo njengentsimbi engatyiwa zifuna umlinganiselo ophantsi wangoku; -izinto eziphantsi zokuxhathisa njengentsimbi ethambileyo zifuna umphezulu wangoku. |
| Electrode Face Diameter | Ngokuhambelana ngokuthe ngqo kwidayamitha | Idayamitha yobuso obukhulu iyanciphisa ukuxinana kwangoku; umsinga opheleleyo kufuneka unyuswe ngokufanelekileyo ukugcina ingxinano. |
Idatha eSebenzayo yoReferensi (Umzekelo: Intsimbi eMild):
|
Ukutyeba kwePhepha elinye (mm) |
Uluhlu lwangoku lweWelding ecetyiswayo (kA) |
| 0.5 + 0.5 | 8 - 12 |
| 1.0 + 1.0 | 12 - 18 |
| 2.0 + 2.0 | 20 - 28 |
Iingcebiso zokuSebenzisa:
- Ngokugqithisileyo ngoku: Ngokulula kukhokelela ekugxothweni okunzima (i-spatter), ukunxitywa kwe-electrode ekhawulezileyo, kunye nokufakwa okuphezulu komphezulu okanye ukutshisa.
- Ukunganelanga okwangoku: Iziphumo kwisayizi ye-nugget engafanelekanga, ekhokelela kwi-welds ebandayo okanye amandla angonelanga.
- Entle-Umgaqo-siseko woKulungisa: Ukwandisa ukusebenza kakuhle kunye nokungaguquguquki kwe-weld, sebenzisa i-welding ephezulu kancinane kunye nexesha elifutshane, ngaphandle kokuba ukugxothwa kuthintelwe.
2. Ixesha le-Welding (t): "Umlawuli" woMfumba woBushushu
Ixesha le-welding, ngokubambisana ne-current, limisela igalelo lobushushu elipheleleyo ngexesha lenkqubo ye-welding ($ Q \\ propto I ^ 2Rt $). Ukukwazi kwee-welders ze-MFDC ukufikelela kwi-millisecond{2}}ulawulo oluchanekileyo lwenqanaba luyinzuzo ebalulekileyo ngaphezu kwee-welders ze-AC eziqhelekileyo.
Ixesha le-Welding ye-MFDC libandakanya izigaba ezininzi ze-pulse:
| Inqanaba lePulse | Inkcazo | Uluhlu lwexesha elicetyisiweyo |
| Ixesha lokucutha | Iqinisekisa uqhagamshelwano oluqinileyo phakathi kwe-electrode kunye ne-workpiece, ukuphelisa izithuba. | 100 - 500 ms |
| Ixesha le-Weld | Ixesha elililo langoku lokuhamba elisetyenziselwa ukwenza i-nugget. | 50 - 250 ms |
| Bamba Ixesha | Ixesha i-electrode igcina uxinzelelo emva kokuba i-current inqunyulwe, ivumela i-nugget ukuba ipholise kwaye iqiniswe phantsi koxinzelelo, ukukhusela ukuncipha kunye nokuqhekeka. | 100 - 300 ms |
| Ixesha lokuvala | Ixesha lekhefu ukuze umshiseli alungiselele indawo yokuwelda elandelayo. | 50 - 150 ms |
Iingcebiso zokuSebenzisa:
- Ixesha kunye noLungelelwaniso lwangoku: Ixesha eligqithisiweyo le-welding likhokelela ekuqokeleleni ukushisa okugqithisileyo, okunokubangela ukugqithiswa kunye nokuxoshwa; ixesha elingonelanga, nokuba liphezulu langoku, linokubangela iiwelds ezibandayo ngenxa yobushushu obungonelanga. Indibaniselwano ye "High Current, Short Time" ikhethwa ngokubanzi ukunciphisa ubushushu{1}}zowuni echaphazelekayo (HAZ) kunye nokwandisa ukusebenza kakuhle kwemveliso.
- I-Multi-I-Pulse Application: Yezinto ezikhethekileyo (umzekelo, intsimbi ekhandiweyo), usebenzisa i-dual-i-pulse okanye i-multi{4}}ulawulo lwe-pulse luvumela ulawulo olusebenzayo losasazo lobushushu kunye nokwenziwa kwe-nugget.
3. I-Electrode Force (F): "Isiqinisekiso" soQhagamshelwano kunye nokuQinisekisa
Amandla e-Electrode yiparameter ebalulekileyo eqinisekisa uqhagamshelwano oluqinileyo phakathi kwezinto zokusebenza, inciphisa ukuxhathisa ukudibanisa, kwaye ifake uxinzelelo lokubumba njengoko i-nugget iqina.
| Amandla Agqithisileyo | Amandla angonelanga | Injongo yokuPhucula |
| Indawo yoqhagamshelwano iyanda, ukuxinana kwangoku kuncipha, ukuthintela ukubunjwa kwe-nugget. | Ukuchasana noqhagamshelwano kuphezulu kakhulu, kulula ukukhokelela ekugxothweni okukhulu kunye nokutshiswa kwendawo. | Qinisekisa uqhagamshelwano oluluqilima lweworkpiece kunye nokubonelela ngoxinzelelo olwaneleyo lokubumba emva kokwenziwa kwe-nugget. |
Idatha eSebenzayo yoReferensi (Umzekelo: Intsimbi eMild):
| Ukutyeba kwePhepha elinye (mm) | Uluhlu lweNgqiqo yoMbane oCetyisiweyo (kN) |
| 0.5 + 0.5 | 1.5 - 3.0 |
| 1.0 + 1.0 | 3.0 - 5.0 |
| 2.0 + 2.0 | 5.0 - 8.0 |
Iingcebiso zokuSebenzisa:
- Ukunyanzeliswa kunye nokulungelelaniswa kwangoku: Njengoko amandla enyuka, ukuchasana koqhagamshelwano kuncipha, kufuna ukunyuka okuhambelanayo okwangoku ukuhlawulela ukulahleka kobushushu.
- Ukunyanzeliswa kunye nokugxothwa: Ukungonelanga kwamandla yimbangela enkulu yokugxothwa. Ukwandisa amandla ngokufanelekileyo kunokucinezela isitshizi ngaphandle kokubeka esichengeni ukuxinana kwangoku.
II. ISicelo esiKhethekileyo: IiNgcaciso zeWelding kunye neDual-Technique yePulse yeSimbi eGalvanized
Intsimbi yegalvanized inikezela ngeemfuno eziphezulu kwiiparameters ze-welding ngenxa yomahluko obalulekileyo phakathi kwendawo yokunyibilika ye-zinc coating (malunga . 419 neqondo, indawo yokubilisa malunga . 907 nesidanga) kunye ne-substrate yentsimbi (indawo yokunyibilika malunga ne-{2}} degree).
1. Imingeni kwiWelding Galvanized Steel
- IZinc Layer Interference: Umaleko we-zinc uyamka kubushushu obuphezulu be-welding, yenze umphunga we-zinc obangela ukugxothwa kwaye ungcolise ubuso be-electrode.
- I-Electrode Wear: I-Zinc iphendula kunye ne-electrode yobhedu yokwenza ii-alloys zobhedu, ukukhawulezisa ukunxiba kwe-electrode.
- Umgangatho we-Nugget: Umphunga we-zinc unokuthintela ukubunjwa kwe-nugget, ukuphazamisa amandla e-weld.
2. Ubuchwephesha obuphambili: iDual-Pulse (Pre{2}}Ubushushu) iWelding
Ukulungisa umba womaleko we-zinc, abaweldi beMFDC bahlala besebenzisa iDual{{0}IPulse okanye yaPhambi{1}}ubuchule be-Heat Pulse:
- Phambi-I-Pulse yoBubushushu (Ixesha eliphantsi, ixesha elifutshane): I-pulse yangoku encinci isetyenziswa ngaphambili{1}}ukutshisa i-workpiece kwaye ivuthe ngobunono okanye ikhuphe umaleko we-zinc kwindawo yoqhagamshelwano, idala iimeko zoqhagamshelwano ezifanelekileyo ze-weld engundoqo elandelayo.
- I-Main Weld Pulse (Eyangoku ephezulu, Ixesha elifutshane): Emva kokuba umaleko we-zinc ulawulwe ngokufanelekileyo, umsinga ophezulu usetyenziswa ukwenza ngokukhawuleza i-nugget ephezulu yekhwalithi.
ISingqinisiso Sokuwelda Kwentsimbi yeGalvanized (0.8mm + 0.8mm):
| Ipharamitha | Phambi-I-Pulse yoBubushushu | I-Weld Pulse engundoqo |
| Yangoku (kA) | 5 - 8 | 15 - 20 |
| Ixesha (ms) | 30 - 50 | 80 - 120 |
|
Amandla e-Electrode (kN) |
3.5 - 4.5 (Qoqo) | 3.5 - 4.5 (Qoqo) |
III. Inkqubo yokuSeta iParameter yenzululwazi kunye namava asebenzayo
Ukuseta i-MFDC iiparamitha zokuwelding ayingomsebenzi "omnye-kwaye{1}}wenziwe" kodwa yinkqubo yomjikelo wokuziqhelanisa, uvavanyo, kunye nokwandisa.
1. Inkqubo yokuSeta iParameter yeScientific
1.Misela iiNkcazelo ezisisiseko:Qhagamshelana netshati ecetyiswayo yenkcazo ye-welding ebonelelwe ngumenzi wokuwelda ngokusekwe kwisixhobo sokusebenza, ubukhulu, kunye nohlobo lwe-electrode ukufumana amaxabiso okuqala angoku, ixesha kunye namandla.
2.Qhuba uvavanyo lokuqala:Sebenzisa iiparameters zokuqala ukudibanisa amabala angama-10-20 kwaye wenze uvavanyo olutshabalalisayo (njengovavanyo lwe-peel) ukujonga ubungakanani be-nugget kunye namandla e-weld.
3. Qwalasela i-Welding Phenomena:
- Ukugxothwa ngokukrakra: Ngokuyintloko khangela ukuba i-Electrode Force yanele; okwesibini, qwalasela ukuba i-Welding Current iphezulu kakhulu.
- I-Nugget enganelanga / i-Cold Weld: Ngokuyinhloko ukwandisa i-Welding yangoku; okwesibini, ukwandisa ngokufanelekileyo iXesha leWeld.
- I-Indentity Surface Induction: Nciphisa kancinci i-Electrode Force okanye i-Welding yangoku.
4.Okulungileyo{1}}Yenza uPhuculo:Lungisa iparameter enye kuphela ngexesha, ngokunyuka kwe-5% ukuya kwi-10%, de kube amandla afunekayo kunye nokubonakala kuphunyeziwe.
5.Isiqinisekiso Sozinzo:Yenza iimvavanyo zexesha elide, eziqhubekayo kunye nemilinganiselo ephuculweyo ukuqinisekisa uzinzo phantsi kweemeko ezifana nokunxiba kwe-electrode kunye notshintsho lobushushu.
2. Izinto eziluncedo kunye neMisebenzi ePhezulu ye-MFDC Welders
Umgangatho ophezulu-ubuchule bokuwelda obuchanekileyo be-MFDC abatyhidi kubalelwa kwiinkqubo zabo zolawulo oluphezulu:
- Kuvaliwe{0}}Ulawulo lwangoku:Iwelder ijonga esona siphumo sangoku ngexesha lokwenyani kwaye ngokukhawuleza siyilungise ngokwexabiso elibekiweyo, iqinisekisa uzinzo kunye nokungaguquguquki kwegridi okanye utshintsho kwisixhobo sokuxhathisa.
- Ulawulo lwangoku lweSlope:Ivumela umsinga ukuba unyuke kancinci okanye wehle ngexesha elimisiweyo. Ukusebenzisa i-upslope ngokufanelekileyo kunciphisa ukuxoshwa kokuqala kunye nokukhuthaza ukusabalalisa ukushisa okufanayo; usebenzisa i-downslope aids ekupholiseni okuzinzileyo kwe-nugget.
- Kaninzi-Ugcino oluneenkcukacha:Abalawuli bale mihla be-welder be-MFDC banokugcina uninzi okanye amakhulu eenkcukacha ze-welding, zivumela abasebenzisi ukuba batshintshe ngokukhawuleza phakathi kwezinto ezahlukeneyo zokusebenza, okwenza kube lula ukwenziwa.
Ukuqukumbela
Ukuseta iiparamitha zeMedium Frequency Spot Welder yinkqubo efuna indibaniselwano yesikhokelo sethiyori kunye namava asebenzayo.
Undoqo ulele ekuqondeni ubudlelwane kunye nokulungelelaniswa phakathi kwe-Welding yangoku, i-Welding Time, kunye ne-Electrode Force.
Ngokulandela inkqubo yokusetwa kwezenzululwazi kunye nokusebenzisa ulawulo oluchanekileyo lwe-MFDC welder kunye -nobuchwepheshe bepulse, ngakumbi ngokuthatha izinto ezimbini-ezicacileyo zepulse zemathiriyeli ekhethekileyo njengentsimbi eyenziwe ngamagalvanized, uya kukwazi ukuphucula kakhulu umgangatho we-weld, ukwandisa ubomi be-electrode, kwaye ekugqibeleni unciphise iindleko zemveliso, ukuphumeza imveliso ye-welding esebenzayo kwaye ezinzileyo.
