Yintoni uxhulumaniso lwangoku oluthe ngqo, yintoni uxhulumaniso oluthe ngqo lwangoku, kunye nendlela yokukhetha xa udibanisa

1. Udibaniso lwangaphambili lweDC (okt indlela yoqhagamshelwano lwangaphambili):

Indlela yokudibanisa phambili ibhekisela kwindlela yocingo esetyenziselwa ukulinganisa i-dielectric loss factor kwi-Xilin bridge circuit test.I-dielectric loss factor elinganiswe yindlela yokudibanisa phambili incinci, kwaye i-dielectric loss factor ilinganiswa ngendlela yokudibanisa i-reverse inkulu.Xa kuthelekiswa nendlela yokudibanisa umva, indlela yokudibanisa phambili inokunciphisa ngempumelelo impembelelo ye-antihalo layer surface resistance kwi-dielectric loss factor test value.

2. Uqhagamshelo lwe-DC umva (okt indlela yoqhagamshelo ebuyela umva):

Ibhekisela kwindlela yokudibanisa isiphaluka ngexesha le-welding.Kwi-tungsten arc welding, i-DC i-reverse connection inefuthe lokususa ifilimu ye-oxide, ebizwa ngokuba yi-"cathode fragmentation" okanye "i-cathode atomization".

Isiphumo sokususa iifilimu ze-oxide zikwakho kwi-reverse polarity half-wave ye-AC welding.Yinto ebalulekileyo ekudibaniseni ngempumelelo i-aluminium, i-magnesium kunye ne-alloys yazo.

3. Xa welding, kufuneka ukhethe ngokukodwa DC udibaniso phambili okanye DC uqhagamshelo reverse ngokweemfuno izixhobo welding.

Ukuziqhelanisa kuye kwafakazela ukuba xa i-DC idityaniswe ngokuphambeneyo, ifilimu ye-oxide phezu kwendawo yokusebenza ingasuswa phantsi kwesenzo se-arc ukufumana i-weld eqaqambileyo, enhle kwaye eyenziwe kakuhle.Ukuba intonga yocingo inokwahlulwa emhlabeni, uvavanyo lwe-site kufuneka lusebenzise indlela yokudibanisa efanelekileyo kangangoko kunokwenzeka.

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Ulwazi olwandisiweyo

Umgaqo we-DC woqhagamshelo umva:
Xa i-DC iguqulwa, ifilimu ye-oxide phezu kwendawo yokusebenza ingasuswa phantsi kwesenzo se-arc ukufumana i-weld eqaqambileyo, enhle kunye neyakheke kakuhle.

Oku kungenxa yokuba ii-oxide zetsimbi zinemisebenzi emincinci kwaye zikhupha ii-electron ngokulula, ngoko ke amabala e-cathode alula ukwenza ifilimu ye-oxide kwaye enze ii-arcs.Amabala e-cathode anepropati yokukhangela ngokuzenzekelayo ii-oxide zetsimbi.

Ubuninzi bamandla bendawo ye-cathode buphezulu kakhulu, kwaye ibetha i-ion ekhangayo kunye nobunzima obukhulu, obuphula ifilimu ye-oxide.

Nangona kunjalo, umphumo wokushisa we-DC uxhulumaniso lwe-reverse luyingozi kwi-welding, kuba i-anode ye-tungsten argon arc welding ishushu ngaphezu kwe-cathode.Xa i-polarity ibuyiselwa umva, ii-electron zibhobhoza i-electrode ye-tungsten kwaye ikhuphe ubushushu obuninzi, obunokufudumala ngokulula kwaye bunyibilikise i-electrode ye-tungsten.Ngeli xesha, ukuba i-welding current ye-125A iza kugqithiswa, intonga ye-tungsten enobubanzi obumalunga ne-6mm iyadingeka ukukhusela i-electrode ye-tungsten ekunyibilikeni.

Kwangaxeshanye, ngenxa yokuba akukho mandla maninzi akhutshiweyo kwi-weldment, ubunzulu bokungena kwe-weld bunzulu kwaye bubanzi, imveliso iphantsi, kwaye kuphela malunga ne-3mm yeepleyiti ze-aluminium ezinobunzima.Ke ngoko, uqhagamshelo olubuyela umva lweDC alufane lusetyenziswe kwi-tungsten arc welding ngaphandle kwe-aluminium yokuwelda kunye neepleyiti ezincinci ze-magnesium.