Resistance spot welding inzira inoshandiswa zvakanyanya mukugadzira, kunyanya muindasitiri yemotokari, uko inoita basa rakakosha mukubatanidza zvinhu zvesimbi pamwechete. Chimwe chezvinhu zvinogona kukanganisa zvakanyanya kunaka kwenzvimbo welds ndeye polarity yewelding process. Muchikamu chino, isu tichaongorora kuti polarity inokanganisa sei kuramba nzvimbo welding uye zvazvinoreva kune weld mhando.
Understandi
Resistance spot welding, inowanzongonzi spot welding, inosanganisira kubatanidzwa kwemarata maviri kana anopfuura nekuisa kupisa uye kumanikidza panzvimbo dzakati. Iyi nzira inotsamira pakuramba kwemagetsi kugadzira kupisa kunodiwa kwewelding. Polarity, muchirevo chekupikisa welding, inoreva kurongeka kwekuyerera kwemagetsi emagetsi.
Polarity mu Resistance Spot Welding
Resistance spot welding inowanzo shandisa imwe yemapolarities maviri: yakananga ikozvino (DC) electrode negative (DCEN) kana yakananga ikozvino electrode yakanaka (DCEP).
- DCEN (Direct Current Electrode Negative):MuDCEN welding, electrode (kazhinji yakagadzirwa nemhangura) yakabatanidzwa kune yakaipa terminal yesimba remagetsi, nepo workpiece yakabatanidzwa kune yakanaka terminal. Iyi gadziriro inotungamirira kupisa kwakawanda mukati me workpiece.
- DCEP (Direct Current Electrode Positive):MuDCEP welding, iyo polarity inodzoserwa kumashure, ine electrode yakabatana kune yakanaka terminal uye workpiece kune iyo yakaipa terminal. Iyi gadziriso inoguma nekupisa kwakawanda kuri kuiswa mu electrode.
Iyo Impact yePolarity
Sarudzo ye polarity inogona kuve nemhedzisiro yakakosha pane yekudzivirira nzvimbo welding process:
- Kugovera Kupisa:Sezvambotaurwa, DCEN inoisa zvakanyanya kupisa mune yekushanda, ichiita kuti ive yakakodzera kune welding zvinhu zvine yakakwirira yekupisa conductivity. DCEP, kune rumwe rutivi, inotungamira kupisa kwakawanda mu electrode, iyo inogona kubatsira kana welding zvinhu zvine yakaderera thermal conductivity.
- Electrode Wear:DCEP inokonzeresa kupfeka maelectrode akawanda kana ichienzaniswa neDCEN nekuda kwekupisa kwakanyanya kwakaiswa mumagetsi. Izvi zvinogona kutungamirira kune kakawanda kuchinjwa kwe electrode uye kuwedzera mari yekushandisa.
- Weld Quality:Kusarudzwa kwe polarity kunogona kukanganisa kunaka kwe weld. Semuyenzaniso, DCEN inowanzosarurwa kusonerera zvinhu zvitete nekuti inogadzira yakatsetseka, isinganyanyi kuparadzirwa weld nugget. Kusiyana neizvi, DCEP inogona kufarirwa kune zvakakora zvinhu uko kupisa kwakanyanya kunodiwa kuti fusion ikwane.
Mukupedzisa, iyo polarity yakasarudzirwa resistance spot welding inoita basa rakakosha pakuona kunaka uye hunhu hweweld. Sarudzo pakati peDCEN neDCEP inofanirwa kubva pazvinhu zvakaita serudzi rwezvinhu, ukobvu, uye zvivakwa zveweld zvinodiwa. Vagadziri vanofanirwa kutarisisa zvinhu izvi kuti vakwidze maitiro avo ekuisa nzvimbo uye kugadzira emhando yepamusoro, akavimbika welds mumashandisirwo akasiyana.
Nguva yekutumira: Sep-23-2023
