1. Unyanzvi hunokosha hwe argontungsten arc welding
1.1 Kusarudzwa kwe tungsten argon arc welding muchina uye simba polarity
TIG inogona kukamurwa kuita DC uye AC pulses.DC pulse TIG inonyanya kushandiswa kugadzira simbi yesimbi, simbi yakapfava, simbi isingadziviriri, nezvimwewo, uye AC pulse TIG inonyanya kushandiswa kugadzira simbi dzakareruka dzakadai sealuminium, magnesium, copper nema alloys awo.Ose ari maviri AC uye DC pulses anoshandisa magetsi ane anodonha maitiro, uye TIG welding yemashizha esimbi isina simbi kazhinji inoshandisa DC yakanaka yekubatanidza.
1.2 Unyanzvi hwakakosha hwechinyorwa argon tungsten arc welding
1.2.1 Arc inorova
Kune mhando mbiri dzearc ignition: isiri-yekubata uye yekubata pfupi-yedunhu arc ignition.Iyo yaimbova electrode haina kusangana neiyo workpiece uye inokodzera zvese DC uye AC welding, nepo yekupedzisira yakakodzera chete DC welding.Kana nzira yepfupi-yedunhu inoshandiswa kurova arc, iyo arc haifanirwe kutangwa zvakananga pane weldment, nekuti zviri nyore kukonzeresa tungsten kuiswa kana kusungirirwa neworkpiece, iyo arc haigone kudzikamiswa nekukurumidza, uye arc iri nyore kuita. pinda mukati meiyo base zvinhu, saka iyo arc yekurova ndiro inofanira kushandiswa.Isa ndiro tsvuku yemhangura padivi pearc point, tanga arc pairi kutanga, uye wozoenda kune chikamu chinosungirirwa mushure mekunge tungsten tip yapisa kune imwe tembiricha.Mukugadzirwa chaiko, TIG inowanzo shandisa arc starter kutanga arc.Pasi pechiito chekupuruzira ikozvino, iyo argon gasi inoiswa ionized kuti itange arc.
1.2.2 Tack welding
Panguva yekugadzira welding, waya yewelding inofanirwa kuve yakatetepa pane yakajairika welding waya.Nekuda kwekushisa kwakadzikama uye kutonhora nekukurumidza panguva yewelding, iyo arc inogara kwenguva yakareba, saka zviri nyore kupisa.Paunenge uchiita welding welding, iyo welding wire inofanira kuiswa panzvimbo yewelding chinzvimbo, uye arc yakagadzikana Wobva waenda kune welding waya, uye misa arc nekukurumidza mushure mekunyunguduka waya welding uye fuses nesimbi yepasi pamativi ese.
1.2.3 Normal welding
Kana TIG yakajairwa ichishandiswa kugadzira simbi isina simbi mashizha, ikozvino inotora kukosha kushoma, asi kana ikozvino iri pasi pe20A, arc drift iri nyore kuitika, uye tembiricha yenzvimbo ye cathode yakanyanya, izvo zvinokonzeresa kurasikirwa nekupisa. munzvimbo yewelding uye mamiriro asina kunaka eelectron emission, zvichikonzera Iyo cathode spot inogara ichisvetuka uye zvakaoma kuchengetedza yakajairika soldering.Kana pulsed TIG ichishandiswa, iyo peak ikozvino inogona kuita kuti arc igadzikane, kurongeka kwakanaka, uye base simbi iri nyore kunyunguduka uye kuumbwa, uye matenderedzwa anochinjika kuti ave nechokwadi chekufambira mberi kwakanaka kweiyo welding process.welds.
2. Weldability kuongororwa kwesimbi isina tsvina sheet
Zvimiro zvemuviri uye chimiro chesimbi isina tsvina pepa inobata zvakananga kunaka kwe weld.Stainless simbi sheet ine diki yekupisa conductivity uye yakakura mutsara wekuwedzera coefficient.Kana tembiricha yewelding ichichinja nekukurumidza, iyo thermal stress inogadzirwa yakakura, uye zviri nyore kukonzera kupisa-kuburikidza, undercut uye wave deformation.Mashizha esimbi asina simbi anotungidzirwa anowanzo tora simbi yakatsetseka.Dziva rakanyungudutswa rinonyanya kukanganiswa nearc force, kusimba kwesimbi yedziva yakanyungudutswa uye kudhonzwana kwepamusoro kwesimbi yedziva yakanyungudutswa.Kana vhoriyamu, hunhu uye hupamhi hwakanyungudutswa hwesimbi yakanyungudutswa dziva dziri kugara, kudzika kwedziva rakanyungudutswa kunoenderana nearc.Saizi, kudzika kwekupinda uye simba rearc zvine hukama neazvino welding, uye hupamhi hwekusanganisa hunotarwa nearc voltage.
Kuwanda kwehuwandu hwedziva rakanyungudutswa, kunowedzera kusimba kwepamusoro.Kana kushushikana kwepamusoro kusingakwanise kuenzanisa simba rearc uye kusimba kwesimbi yakanyungudutswa dziva, zvinokonzeresa kuti dziva rakanyungudutswa ripise, uye rinopisa nekutonhodzwa munharaunda panguva yekugadzira welding, zvichiita kuti weldment iite Inhomogeneous kusagadzikana uye kunetsa, apo iyo longitudinal kupfupika kweiyo weld seam kunokonzera kushushikana kumucheto kwendiro yakatetepa kudarika imwe kukosha, inoburitsa yakanyanya kuoma wave deformation uye kukanganisa chimiro chemhando yebasa.Pasi peiyo imwechete welding nzira uye magadzirirwo maparamendi, akasiyana maumbirwo etungsten electrode anoshandiswa kuderedza kupisa kupinza pajoinhi rewelding, izvo zvinogona kugadzirisa matambudziko ekupisa-kuburikidza uye workpiece deformation.
3. Kushandiswa kwemanyorero tungsten argon arc welding mustainless simbi sheet welding
3.1 Welding musimboti
Argon tungsten arc welding imhando yeakavhurika arc welding ine arc yakagadzikana uye yakadzikama kupisa.Pasi pekuchengetedzwa kwegasi inert (argon gas), dziva rekushongedza rakachena uye kunaka kweiyo weld seam yakanaka.Nekudaro, kana welding simbi isina tsvina, kunyanya austenitic Stainless simbi, kumashure kweiyo weld inodawo kuchengetedzwa, zvikasadaro yakakomba oxidation ichaitika, iyo ichakanganisa kuumbwa kweweld uye kuita welding.
3.2 Welding maitiro
Iyo welding yeStainless simbi mapepa ine zvinotevera maitiro:
1) Iyo yekupisa conductivity yesimbi isina simbi pepa haina kunaka, uye zviri nyore kupisa kuburikidza zvakananga.
2) Hapana welding wire inodiwa panguva yewelding, uye base simbi inosanganiswa zvakananga.
Naizvozvo, kunaka kwesimbi isina simbi sheet welding inowirirana zvakanyanya nezvinhu zvakaita sevashandi, midziyo, zvinhu, nzira dzekuvaka, nharaunda yekunze uye kuyedza panguva yewelding.
Mukugadzira mashizha esimbi isina tsvina, zvinhu zvinopisa hazvidiwi, asi zvinodiwa zvezvinhu zvinotevera zvakakwirira: imwe ndiyo kuchena kweargon gasi, kuyerera uye nguva yekuyerera kweargon, uye imwe ndiyo tungsten. electrode.
1) Argon
Argon igasi inert, uye hazvisi nyore kuita nezvimwe zvinhu zvesimbi uye magasi.Pamusana pekutonhora kwemhepo yaro, iyo inopisa-yakakanganiswa nzvimbo ye weld idiki, uye deformation ye weldment idiki.Ndiyo yakanyanya kunaka kudzivirira gasi kune argon tungsten arc welding.Kuchena kwe argon kunofanira kunge kwakakura kupfuura 99.99%.Argon inonyanya kushandiswa kuchengetedza dziva rakanyungudutswa zvinobudirira, kudzivirira mhepo kubva pakubvisa dziva rakanyungudutswa uye kukonzera oxidation panguva yekugadzira welding, uye panguva imwecheteyo inonyatso kutsaura iyo weld nzvimbo kubva mumhepo, kuitira kuti weld nzvimbo ichengetedzwe uye welding performance inovandudzwa.
2) Tungsten electrode
Iyo yepamusoro ye tungsten electrode inofanira kunge yakatsetseka, uye kuguma kunofanira kurodzwa nekunaka kwemukati.Nenzira iyi, iyo yakakwira-frequency arc ignition yakanaka, kugadzikana kwearc kwakanaka, kudzika kwewelding kwakadzika, dziva rakanyungudutswa rinogona kuchengetedzwa rakagadzikana, weld seam yakaumbwa zvakanaka, uye mhando yewelding yakanaka.Kana iyo yepamusoro ye tungsten electrode yakatsva kana pane kukanganisa kwakadai sekusvibisa, kuputika, uye shrinkage cavities pamusoro, zvichange zvakaoma kutanga arc-frequency arc panguva yekuputika, arc inenge isina kugadzikana, iyo arc ichaita. kukukurwa, dziva rakanyungudutswa richapararira, kumusoro kuchawedzera, kudzika kwekupinda kuchave kushoma, uye musono we weld uchakuvadzwa.Kusaita zvakanaka, kunaka kwewelding.
4 Mhedziso
1) Kugadzikana kweargon tungsten arc welding yakanaka, uye akasiyana tungsten electrode maumbirwo ane pesvedzero huru pamhando yewelding yemashizha esimbi.
2) Tungsten electrode welding ine flat top uye conical tip inogona kuvandudza chiyero chekugadzirwa kwe-single-sided welding uye kaviri-sided welding, kuderedza kupisa-kukanganisa nzvimbo yewelding, iyo weld shape yakanaka, uye yakazara ma mechanical zvinhu zviri nani.
3) Kushandisa nzira chaiyo yewelding kunogona kudzivirira zvinorema kukanganisa.
Nguva yekutumira: Jul-18-2023