Umthelela we-Polarity ku-Resistance Spot Welding

I-Resistance spot welding iyinqubo esetshenziswa kakhulu ekukhiqizeni, ikakhulukazi embonini yezimoto, lapho idlala indima ebalulekile ekuhlanganiseni izingxenye zensimbi ndawonye. Esinye sezici ezingathinta kakhulu izinga le-spot welds yi-polarity yenqubo yokushisela. Kulesi sihloko, sizohlola ukuthi i-polarity ithonya kanjani ukushisela kwendawo yokumelana nemithelela yayo ngekhwalithi yokushisela.

 Qonda

I-Resistance spot welding, ngokuvamile ebizwa ngokuthi i-spot welding, ihlanganisa ukuhlanganisa amashidi ensimbi amabili noma ngaphezulu ngokufaka ukushisa nokucindezela ezindaweni ezithile. Le nqubo incike ekuphikisweni kukagesi ukukhiqiza ukushisa okudingekayo kokushisela. I-polarity, kumongo we-resistance welding, ibhekisela ekuhlelweni kokugeleza kukagesi we-welding current.

I-polarity ku-Resistance Spot Welding

I-Resistance spot welding ngokuvamile isebenzisa okukodwa kokubili: i-direct current (DC) electrode negative (DCEN) noma i-direct current electrode positive (DCEP).

1. I-DCEN (I-Direct Current Electrode Negative):Ku-DCEN welding, i-electrode (ngokuvamile eyenziwe ngethusi) ixhunywe ku-terminal engalungile yomthombo wamandla, kuyilapho i-workpiece ixhunywe ku-terminal positive. Leli lungiselelo liqondisa ukushisa okwengeziwe ku-workpiece.
2. I-DCEP (Direct Current Electrode Positive):Ku-DCEP welding, i-polarity iyahlehliswa, i-electrode ixhunywe kutheminali ephozithivu kanye nocezu lokusebenza endaweni yokugcina okunegethivu. Lokhu kucushwa kuholela ekushiseni okwengeziwe kugxile ku-electrode.

Umthelela we-Polarity

Ukukhethwa kwe-polarity kungaba nomthelela omkhulu kunqubo yokushisela indawo yokumelana:

1. Ukusabalalisa Ukushisa:Njengoba kushiwo ngaphambili, i-DCEN igxilisa ukushisa okwengeziwe ku-workpiece, okwenza ifaneleke izinto zokushisela ezine-conductivity ephakeme yokushisa. I-DCEP, ngakolunye uhlangothi, iqondisa ukushisa okwengeziwe ku-electrode, okungaba nenzuzo lapho izinto zokushisela ezine-conductivity ephansi yokushisa.
2. I-Electrode Wear:I-DCEP ivamise ukubangela ukugqokwa kwama-electrode amaningi uma kuqhathaniswa ne-DCEN ngenxa yokushisa okuphezulu okugxilwe ku-electrode. Lokhu kungaholela ekushintshweni njalo kwama-electrode kanye nezindleko zokusebenza ezandayo.
3. Ikhwalithi ye-Weld:Ukukhethwa kwe-polarity kungathinta ikhwalithi ye-weld. Isibonelo, i-DCEN ivamise ukuncanyelwa ukushisela izinto ezincanyana ngoba ikhiqiza i-weld nugget eshelelayo, engasaphazeki kancane. Ngokuphambene, i-DCEP ingase ikhethelwe izinto eziwugqinsi lapho ukugxiliswa kokushisa okukhulu kuyadingeka ukuze kuhlanganiswe okufanele.

Sengiphetha, i-polarity ekhethelwe ukushisela indawo yokumelana idlala indima ebalulekile ekunqumeni ikhwalithi nezici ze-weld. Isinqumo phakathi kwe-DCEN ne-DCEP kufanele sisekelwe ezintweni ezifana nohlobo lwempahla, ukujiya, kanye nezakhiwo zokushisela ezifiselekayo. Abakhiqizi kufanele bacabangele ngokucophelela lezi zici ukuze bathuthukise izinqubo zabo zokushisela amabala futhi bakhiqize amashisela asezingeni eliphezulu, athembekile ezinhlelweni ezihlukahlukene.