Impembelelo yePolarity kwi-Resistance Spot Welding

I-Resistance spot welding yinkqubo esetyenziswa ngokubanzi kwimveliso, ngakumbi kushishino lweemoto, apho idlala indima ebalulekileyo ekudibaniseni izinto zentsimbi kunye. Enye yezinto ezinokuchaphazela kakhulu umgangatho we-spot welds yi-polarity yenkqubo ye-welding. Kweli nqaku, siza kuphonononga ukuba i-polarity inefuthe njani kwi-weld spot welding kunye neziphumo zayo kumgangatho we-weld.

 Qonda

I-Resistance spot welding, edla ngokubizwa ngokuba yi-spot welding, ibandakanya ukudityaniswa kweentsimbi ezimbini nangaphezulu ngokufaka ubushushu kunye noxinzelelo kwiindawo ezithile. Le nkqubo ixhomekeke ekuxhathiseni kombane ukuvelisa ubushushu obuyimfuneko kwi-welding. I-polarity, kumxholo wokumelana ne-welding, ibhekisela kulungiselelo lokuhamba kombane we-welding yangoku.

I-Polarity kwi-Resistance Spot Welding

I-resistance spot welding ngokuqhelekileyo isebenzisa enye yezimbini ze-polarities: i-electrode negative (DCEN) yangoku (i-DCEN) okanye i-electrode yangoku echanekileyo (DCEP).

1. I-DCEN (I-Electrode yangoku eNegative):Kwi-welding ye-DCEN, i-electrode (ehlala yenziwe ngobhedu) ixhunywe kwi-terminal engafanelekanga yomthombo wamandla, ngelixa i-workpiece ixhunyiwe kwi-terminal positive. Eli lungiselelo liqondisa ubushushu obuninzi kwi-workpiece.
2. I-DCEP (I-Electrode yangoku eNgqongileyo iPositive):Kwi-welding ye-DCEP, i-polarity iguqulwa, kunye ne-electrode exhunywe kwi-terminal efanelekileyo kunye ne-workpiece kwi-terminal engafanelekanga. Olu lungelelwaniso lubangela ubushushu obuninzi bugxininiswe kwi-electrode.

Impembelelo yePolarity

Ukhetho lwe-polarity lunokuba nempembelelo enkulu kwinkqubo yokumelana ne-welding spot:

1. Ukusasazwa koBubushushu:Njengoko kukhankanyiwe ngaphambili, i-DCEN igxininise ubushushu obuninzi kwi-workpiece, iyenza ifaneleke kwizinto ze-welding kunye ne-thermal conductivity ephezulu. I-DCEP, kwelinye icala, iqondisa ubushushu obungakumbi kwi-electrode, enokuba luncedo xa izinto ze-welding zine-conductivity ephantsi ye-thermal.
2. I-Electrode Wear:I-DCEP ikholisa ukubangela ukunxitywa kwe-electrode ngakumbi xa kuthelekiswa ne-DCEN ngenxa yobushushu obuphezulu obugxininiswe kwi-electrode. Oku kunokukhokelela ekutshintshweni kwe-electrode rhoqo kunye nokunyuka kweendleko zokusebenza.
3. Umgangatho weWeld:Ukukhethwa kwe-polarity kunokuchaphazela umgangatho we-weld. Umzekelo, i-DCEN ihlala ikhethwa ukuwelda imathiriyeli ebhityileyo kuba ivelisa i-weld nugget egudileyo, engasasazwanga kangako. Ngokwahlukileyo, i-DCEP inokukhethwa kwizinto ezityebileyo apho ubushushu obukhulu bufuneka khona ukuze kudityaniswe kakuhle.

Ukuqukumbela, i-polarity ekhethiweyo ye-resistance spot welding idlala indima ebalulekileyo ekumiseleni umgangatho kunye neempawu ze-weld. Isigqibo phakathi kwe-DCEN kunye ne-DCEP kufuneka sisekelwe kwizinto ezifana nohlobo lwemathiriyeli, ubukhulu, kunye neempawu ze-weld ezifunwayo. Abavelisi kufuneka baqwalasele ngononophelo ezi zinto ukuze baphucule iinkqubo zabo ze-welding kwaye bavelise umgangatho ophezulu, iiweld ezithembekileyo kwizicelo ezahlukeneyo.