Zotsatira za Polarity pa Resistance Spot Welding

Resistance spot kuwotcherera ndi njira yomwe imagwiritsidwa ntchito kwambiri popanga, makamaka m'makampani amagalimoto, komwe imagwira ntchito yofunika kwambiri pakuphatikiza zitsulo. Chimodzi mwa zinthu zomwe zingakhudze kwambiri khalidwe la welds malo ndi polarity ndondomeko kuwotcherera. M'nkhaniyi, tiwona momwe polarity imakhudzira kuwotcherera kwa malo osakanizidwa ndi zotsatira zake pamtundu wa weld.

 Kumvetsetsa

Kuwotcherera kwa Resistance spot, komwe kumangotchulidwa kuti kuwotcherera, kumaphatikizapo kulumikiza zitsulo ziwiri kapena kuposerapo pogwiritsa ntchito kutentha ndi kukakamiza pamalo enaake. Njirayi imadalira kukana kwamagetsi kuti apange kutentha koyenera kwa kuwotcherera. Polarity, pankhani ya kukana kuwotcherera, imatanthawuza dongosolo la kayendedwe ka magetsi kawotchi.

Polarity mu Resistance Spot Welding

Resistance spot kuwotcherera kumagwiritsa ntchito imodzi mwa ma polarities awiri: Direct current (DC) electrode negative (DCEN) kapena direct current electrode positive (DCEP).

1. DCEN (Direct Current Electrode Negative):Mu kuwotcherera kwa DCEN, electrode (yomwe nthawi zambiri imapangidwa ndi mkuwa) imalumikizidwa ku terminal yoyipa ya gwero lamagetsi, pomwe chogwirira ntchito chimalumikizidwa ku terminal yabwino. Kukonzekera uku kumatsogolera kutentha kwambiri mu workpiece.
2. DCEP (Direct Current Electrode Positive):Mu kuwotcherera kwa DCEP, polarity imasinthidwa, ndi electrode yolumikizidwa ku terminal yabwino ndi workpiece ku terminal yoyipa. Kukonzekera uku kumapangitsa kuti kutentha kuchuluke kwambiri mu electrode.

Zotsatira za Polarity

Kusankhidwa kwa polarity kumatha kukhudza kwambiri njira yowotcherera yokana:

1. Kugawa Kutentha:Monga tanena kale, DCEN imayang'ana kutentha kwambiri muzogwiritsira ntchito, ndikupangitsa kuti ikhale yoyenera zitsulo zowotcherera zokhala ndi matenthedwe apamwamba kwambiri. Komano, DCEP imawongolera kutentha kwambiri mu elekitirodi, yomwe ingakhale yopindulitsa pakuwotcherera zinthu zokhala ndi kutsika kwamafuta.
2. Electrode Wear:DCEP imakonda kupangitsa kuvala kwa ma elekitirodi kwambiri poyerekeza ndi DCEN chifukwa cha kutentha kwakukulu komwe kumakhazikika mu electrode. Izi zitha kupangitsa kuti ma elekitirodi azisinthidwa pafupipafupi komanso kuchuluka kwa ndalama zogwirira ntchito.
3. Weld Quality:Kusankhidwa kwa polarity kungakhudze ubwino wa weld. Mwachitsanzo, DCEN nthawi zambiri imakonda kuwotcherera zinthu zoonda chifukwa imapanga nsonga yosalala, yosabalalika pang'ono. Mosiyana ndi izi, DCEP ikhoza kuyanjidwa ndi zinthu zokhuthala pomwe kutentha kwakukulu kumafunika kuti muphatikizidwe bwino.

Pomaliza, polarity yomwe imasankhidwa kuti ipangitse kuwotcherera pamalo oletsa kumagwira ntchito yofunika kwambiri pakuzindikira mtundu ndi mawonekedwe a weld. Chisankho chapakati pa DCEN ndi DCEP chikuyenera kutengera zinthu monga mtundu wazinthu, makulidwe, ndi zinthu zomwe mukufuna. Opanga ayenera kuganizira mozama zinthu izi kuti akwaniritse njira zawo zowotcherera mawanga ndikupanga ma weld apamwamba kwambiri, odalirika pazogwiritsa ntchito zosiyanasiyana.