Welding Technique yeTIG welding
Iyo welding ikozvino ye tungsten inert gasi arc welding inowanzosarudzwa zvichienderana nechinhu, ukobvu, uye nzvimbo yenzvimbo yebasa. Sezvo iyo welding ikozvino inowedzera, kudzika kwekupinda kunowedzera, uye hupamhi uye kureba kwepamusoro kweiyo weld seam kunowedzera zvishoma, asi kuwedzera kudiki. Kuwedzeredza kana kusakwana welding ikozvino kunogona kukonzera kushata kuumbwa kwe weld kana kukanganisa.
Iyo arc voltage ye tungsten inert gasi welding inonyanya kutsanangurwa nehurefu hwearc. Sezvo kureba kwearc kunowedzera, iyo arc voltage inowedzera, iyo weld hupamhi inowedzera, uye kudzika kwekupinda kunoderera. Kana iyo arc yakanyanya kureba uye iyo arc voltage yakawandisa, zviri nyore kukonzeresa isina kukwana welding uye undercutting, uye mhedzisiro yekudzivirira haina kunaka.
Asi iyo arc haigone kuve yakapfupika zvakare. Kana iyo arc voltage yakadzikira kana kuti arc ipfupi, waya yewelding inowanzoita kupfupi kutenderera kana inobata tungsten electrode panguva yekudyisa, zvichiita kuti tungsten electrode inopisa uye nyore nyore kuteya tungsten. Nokudaro, kureba kwearc kunowanzoitwa kuenzana nehupamhi hwe tungsten electrode.
Kana iyo welding yekumhanyisa ichiwedzera, kudzika uye hupamhi hwekusanganiswa kunoderera. Kana iyo welding yekumhanyisa ichimhanya zvakanyanya, zviri nyore kuburitsa isina kukwana fusion uye kupinda. Kana kumhanya kwewelding kuchinonoka, weld seam yakakura uye inogona kunge iine hurema hwakadai seweld leakage uye kupisa mukati. Munguva yemanyorero tungsten inert gasi welding, kumhanya kwewelding kunowanzo kugadziridzwa chero nguva zvichienderana nehukuru, chimiro, uye fusion mamiriro edziva rakanyungudutswa.
1. Nozzle dhayamita
Kana iyo dhayamita yemhino (inoreva dhayamita yemukati) inowedzera, kuyerera kwegasi rekudzivirira kunofanira kuwedzerwa. Panguva ino, nzvimbo yakadzivirirwa yakakura uye mhedzisiro yekudzivirira yakanaka. Asi kana muromo wakanyanya kukura, haungowedzere kushandiswa kweargon gasi, asiwo zvinoita kuti zviome kutarisa welding arc uye welding kushanda. Naizvozvo, iyo inowanzoshandiswa dhayamita yemhino kazhinji iri pakati pe8mm ne20mm.
2. Distance pakati nozzle uye weldment
Chinhambwe chiri pakati pemhuno nechishandiso chinoreva chinhambwe chiri pakati pechiso chekupedzisira chemuromo uye chebasa. Iyo diki iyi chinhambwe, zviri nani kudzivirira maitiro. Naizvozvo, chinhambwe pakati pemhuno uye weldment chinofanira kunge chiri chidiki sezvinobvira, asi chidiki chakanyanya hachikodzeri kuona dziva rakanyungudutswa. Naizvozvo, kureba pakati pemhuno uye weldment inowanzotorwa se7mm kusvika 15mm.
3. Kuwedzera urefu hwe tungsten electrode
Kuti udzivise arc kubva pakupisa uye kupisa muromo, iyo tungsten electrode tip inofanirwa kuwedzera kupfuura muromo. Chinhambwe kubva patungsten electrode tipi kuenda kumuromo wemuromo wemuromo ndiyo tungsten electrode yekuwedzera kureba. Iyo idiki tungsten electrode yekuwedzera kureba, iyo iri pedyo nedaro pakati penozzle uye workpiece, uye zvirinani kudzivirira maitiro. Zvisinei, kana iri duku zvikuru, inodzivisa kucherechedzwa kwedziva rakanyungudutswa.
Kazhinji, kana welding butt majoini, zviri nani kuti tungsten electrode kuwedzera kureba 5mm kusvika 6mm; Kana welding fillet welds, zviri nani kuva tungsten electrode kuwedzera kureba 7mm kusvika 8mm.
4. Gasi nzira yekudzivirira uye kuyerera kwehuwandu
Pamusoro pekushandisa denderedzwa nozzles kuchengetedza nzvimbo yewelding, tungsten inert gasi welding inogonawo kuita kuti muromo ufuratire (senge rakatetepa gap tungsten inert gasi welding) kana mamwe maumbirwo zvinoenderana nenzvimbo yewelding. Paunenge uchiputira mudzi weld seam, iyo yekumashure weld seam yechikamu chakasungwa ichasvibiswa uye yakasvibiswa nemhepo, saka kudzivirirwa kwekukwira kwemitengo kunofanirwa kushandiswa.
Argon uye helium ndiwo magasi akachengetedzeka ekuputira kumashure panguva yekuputika kwezvinhu zvese. Uye nitrogen ndiyo gasi rakachengeteka rekudzivirira kukwira kwemitengo kana uchitungidza simbi isina tsvina uye alloys emhangura. Iyo gasi inoyerera mwero weyero yekudzivirira inflation ye general inert gasi ndeye 0.5-42L/min.
Iyo inodzivirira mhepo inoyerera haina simba uye haishande, uye inowanzoitika kune zvirema zvakadai seporosity uye oxidation ye welds; Kana iyo mhepo inoyerera yakakura kwazvo, zviri nyore kugadzira mhirizhonga, mhedzisiro yekudzivirira haina kunaka, uye inokanganisawo kupisa kwakagadzikana kwearc.
Paunenge uchiputira pombi fittings, zvakakodzera gasi zvitoro zvinofanira kusiyiwa kudzivirira yakawandisa gasi kumanikidzwa mukati mapaipi panguva welding. Kusati kwapera midzi weld bead welding, zvakakosha kuve nechokwadi kuti gasi rinopinda mukati mepombi harina kunyanya kukwirira, kuitira kudzivirira dziva rekuputira kuti rirege kubuda kunze kana kuti mudzi kubva pakuva concave. Paunenge uchishandisa argon gasi yekudzivirira kumashure kwepombi fittings panguva yekushongedza, zviri nani kupinda kubva pasi, zvichibvumira mweya kubuda kumusoro uye kuchengetedza gasi rekubuda kubva kune weld seam.