Kua tino piki haere te maha o ngā taputapu whakarewa e wātea ana hei ārai i ngā mahi whakatika whakarewa i ngā tau kua pahure ake nei, tae atu ki te rārangi pīpā a te kaihanga whakarewa.
Mena kei runga ake koe i te 50 tau te pakeke, kua mōhio pea koe ki te whakarewa me te mīhini whakarewa SMAW (Shielded Metal Arc, Electrode rānei).
Nā ngā tau 1990 i kawe mai ki a tātou te whai huatanga o te MIG (metal inert gas) me te FCAW (flux-cored arc welding) welding, ā, nā tēnei i mutu ai te whakamahi a te tini o ngā buzzer. Nō nā tata nei, kua uru te hangarau TIG (tungsten inert gas) ki ngā toa ahuwhenua hei huarahi pai ki te whakakotahi i ngā pepa whakarewa, te konumohe me te kowiri tira.
Nā te rongonui haere o ngā mīhini whakarewa maha-kaupapa, ka taea te whakamahi i ngā tukanga e whā i roto i te kete kotahi.
Kei raro nei ngā akoranga whakarewa poto hei whakapai ake i ō pūkenga mō ngā hua pono, ahakoa te tukanga whakarewa e whakamahia ana e koe.
Kua whakatapua e Jody Collier tana mahi ki te whakarewa me te whakangungu whakarewa. Kī tonu ana paetukutuku Weldingtipsandtricks.com me Welding-TV.com i ngā tohutohu me ngā tinihanga whai hua mō ngā momo whakarewa katoa.
Ko te hau pai mō te whakarewa MIG ko te hauhā waro (CO2). Ahakoa he ohanga te CO2, ā, he pai mō te hanga whakarewa hohonu i roto i ngā maitai matotoru, ka wera rawa pea tēnei hau ārai i te wā e whakarewa ana i ngā konganuku angiangi. Koia te take i tūtohu ai a Jody Collier kia huri ki te ranunga o te 75% argon me te 25% hauhā waro.
"Āe, ka taea e koe te whakamahi i te argon parakore hei whakarewa i te konumohe, i te maitai rānei i roto i te MIG, engari ko ngā rauemi tino angiangi anake," tana kī. "Ko ngā mea katoa he mea whakarewa kino ki te argon parakore."
E kī ana a Collier he maha ngā ranunga hau kei te mākete, pērā i te helium-argon-CO2, engari i ētahi wā he uaua ki te kimi, he utu nui hoki.
Mena kei te whakatika koe i te maitai kore waikura i runga i te pāmu, me tāpiri e koe kia rua ngā ranunga o te 100% argon, te argon me te herium rānei hei whakarewa i te konumohe, me te ranunga o te 90% argon, 7.5% herium me te 2.5% hauhā waro.
Ko te uruhanga o te whakarewa MIG e whakawhirinaki ana ki te hau ārai. Mā te hauhā waro (runga matau) ka hohonu te uruhanga o te whakarewa ki te whakarite ki te argon-CO2 (runga maui).
I mua i te whakakoi i te konumohe i te wā e whakatika ana i te konumohe, kia tino horoia te whakarewa kia kore ai e pakaru.
He mea tino nui te horoi whakarewa nā te mea ka rewa te alumina i te 3700°F, ā, ka rewa ngā konganuku turanga i te 1200°F. Nō reira, ko te waikura (te waikura, te waikura mā rānei) te hinu rānei i runga i te mata kua whakatikatikaina ka ārai i te urunga o te konganuku whakakī.
Ko te tango i te ngako te mea tuatahi. Kātahi anō ka tangohia te poke waikura. Kaua e whakarerekētia te raupapa, te whakatūpato a Joel Otter o Miller Electric.
I te pikinga ake o te rongonui o ngā mīhini whakarewa waea i te tekau tau atu i 1990, i akiakihia ngā kaimahi whakarewa pī ki te kohikohi puehu i ngā kokonga o ngā toa.
He rerekē ngā perehiko tawhito i whakamahia mō ngā mahi aukume whakawhiti (AC) anake, ka mahi ngā kaiwhakarewa hou i runga i te aukume whakawhiti me te aukume tika (DC), ka whakarerekē i te porowhita o te whakarewanga 120 ngā wā ia hekona.
He tino nui ngā painga o tēnei huringa tere o te polarity, tae atu ki te māmā ake o te tīmatanga, te iti ake o te piri, te iti ake o te tauhiuhi, te ātaahua ake o ngā whakarewanga, me te māmā ake o te whakarewanga poutū me te whakarewanga o runga.
I te taha o te meka e hōhonu ake ai ngā hononga o te whakapiri rakau, he mea tino pai mō ngā mahi o waho (ka pupuhihia te hau tiaki MIG e te hau), ka mahi pai ki ngā rauemi matotoru, ā, ka tahuna te waikura, te paru, me te peita. He ngāwari hoki te kawe i ngā mīhini whakapiri, ā, he ngāwari ki te whakahaere, nō reira ka kite koe he aha te take he pai te haumi ki tētahi mīhini whakapiri hiko hou, ki tētahi mīhini whakapiri tukatuka-maha rānei.
Kei a Joel Orth o Miller Electric ngā tohu hiko e whai ake nei. Mō ētahi atu kōrero, tirohia: millerwelds.com/resources/welding-guides/stick-welding-guide/stick-welding-tips.
He tūponotanga nui te hau hauwai mō te whakarewa, ka puta he whakaroa mō te whakarewa, he pakaru HAZ e puta ana i ngā hāora, i ngā rā rānei i muri i te otinga o te whakarewa, i ngā mea e rua rānei.
Heoi, ko te mōrearea o te hauwai ka taea te whakakore mā te horoi pai i te konganuku. Ka tangohia te hinu, te waikura, te peita me te makuku nā te mea he pūtake hauwai ēnei.
Heoi anō, he tūmomo mōrearea tonu te hauwai i te wā e whakarewahia ana te maitai kaha-teitei (e whakamahia whānuitia ana i roto i ngā taputapu ahuwhenua hou), ngā kōtaha konganuku matotoru, me ngā wāhi whakarewa tino iti. I te wā e whakatika ana i ēnei rauemi, kia tino whakamahia he hiko hauwai iti, ā, kia whakamahanahia te wāhi whakarewa.
E tohu ana a Jody Collier ko ngā kōhao hautai, ko ngā mirumiru hau ririki rānei e puta ana i te mata o te whakarewa he tohu pono kei te porosity tō whakarewa, ā, e kiia ana e ia koinei te raru tuatahi o te whakarewa.
He maha ngā āhua o te pūngao whakarewa, tae atu ki ngā pūngao mata, ngā kōhao noke, ngā rua, me ngā kōhao, e kitea ana (i runga i te mata) me te kore e kitea (i roto i te whakarewa).
E kī ana hoki a Collier, "Tukua te puna wai kia roa ake te rewa, kia koropupū ai te hau i roto i te whakarewa i mua i te tio."
Ahakoa ko te 0.035 me te 0.045 inihi te whānui o ngā waea e whakamahia whānuitia ana, mā te waea iti ake te whānui ka māmā ake te hanga i tētahi hononga pai. E taunaki ana a Carl Huss o Lincoln Electric kia whakamahia he waea 0.025 inihi, inā koa ka whakamahia he hononga angiangi ki ngā rauemi angiangi 1/8 inihi, iti iho rānei.
I whakamārama ia ko te nuinga o ngā kaiwhakarewa he nui rawa ngā whakarewa, ka taea ai te mura. Mā te waea iti ake te diameter ka pumau ake te whakarewa i te iti o te iahiko, ā, kāore e ngāwari te mura.
Kia tūpato i te wā e whakamahia ana tēnei tikanga ki ngā rauemi matotoru ake (3⁄16″ me te matotoru ake), nā te mea kāore pea e ranea te rewa o te waea mēnā he 0.025″ te whānui.
He moemoeā noa iho tēnei mō ngā kaipāmu e rapu ana i tētahi huarahi pai ake hei whakarewa i ngā konganuku angiangi, te konumohe me te maitai kore waikura, engari kei te piki haere te rongonui o ngā mīhini whakarewa maha-tukatuka i ngā toa pāmu.
Heoi, i runga i ōku ake wheako, ehara i te mea ngāwari te ako i te whakarewa TIG, pērā i te ako i te whakarewa MIG.
Me whakamahi ngā ringa e rua mō te TIG (ko tētahi hei pupuri i te pūtake wera i roto i te hiko tungsten wera-rā, ko tētahi hei whāngai i te tokotoko whakakī ki roto i te pewa) me te waewae kotahi (hei whakahaere i te pētera waewae, i te kaiwhakahaere iahiko rānei e mau ana ki runga i te rama). Ka whakamahia te taunga-toru hei tīmata, hei whakarite me te whakamutu i te rere o te iahiko).
Hei karo i ngā hua pēnei i tāku, ka taea e te hunga tīmata me te hunga e hiahia ana ki te whakakoi i ō rātou pūkenga te whakamahi i ēnei tohutohu whakarewa TIG, e ai ki ngā kupu a te kaitohutohu Miller Electric a Ron Covell, Welding Tips: The Secret to TIG Welding Angitu.
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