He mea nui te whakamahi i te hauhautanga whakamuri o te hauhau hei whakarewa i ngā ngongo me ngā paipa kowiri tira mā te whakamahi i ngā tukanga tuku iho pērā i te whakarewatanga pewa tungsten ārai-hau (GTAW) me te whakarewatanga pewa whakarewa ārai-hau (SMAW). Engari he mea nui te utu o te hau me te wā whakarite o te tukanga horoi, inā koa ka piki haere te whānui me te roa o ngā paipa.
I te wā e whakarewahia ana te maitai kore waikura 300 Series, ka taea e ngā kaimahi kirimana te whakakore i te pakaru o muri i roto i ngā whakarewa pakiaka tuwhera mā te huri mai i te GTAW tuku iho, SMAW rānei ki tētahi tukanga whakarewa matatau, me te pupuri tonu i ngā whakarewa kounga teitei, te pupuri i te ātete ki te waikura o ngā rauemi, me te whakatutuki i te Whakatakotoranga Tukanga Whakarewa (WPS). ) me whai tukanga whakarewa pewa porowhita poto (GMAW). Ka whakaratohia hoki e te tukanga GMAW porowhita poto kua whakapaitia he painga mahi, he whai huatanga me te ngāwari o te whakamahi hei āwhina i te whakapiki ake i ngā hua.
Nā te ātete ki te waikura me te kaha, ka whakamahia ngā koranu kowiri tira i roto i ngā mahi paipa me ngā putorino maha, tae atu ki te hinu me te hau, ngā matū hinu, me ngā wahie koiora. Ahakoa kua whakamahia te GTAW i roto i ngā mahi kowiri tira maha, he ngoikoretanga anō ōna ka taea te whakatika mā te whakamahi i te GMAW ara iahiko poto kua whakapaitia.
Tuatahi, nā te mea kei te iti haere tonu ngā kaiwhakarewa mohio, he wero tonu te kimi i ngā kaimahi e mōhio ana ki te GTAW. Tuarua, ehara te GTAW i te tukanga whakarewa tere rawa, e aukati ana i ngā kamupene e hiahia ana ki te whakapiki i te hua hei whakatutuki i ngā hiahia o ngā kiritaki. Tuatoru, me roa, me utu nui hoki te horoinga o ngā paipa kowiri tira.
He aha te urupare? Ko te purenga ko te whakaurunga o te hau i te wā o te tukanga whakarewa hei tango i ngā poke me te tautoko. Ko te purenga taha muri ka tiaki i te taha muri o te whakarewa mai i te hanganga o ngā waikura taumaha i te aroaro o te hāora.
Ki te kore te taha o muri e tiakina i te wā e whakarewahia ana te awa pakiaka tuwhera, ka pakaru pea te turanga. Ka kiia tēnei pakaru ko te saccharification nā te mea ka puta he mata rite ki te huka i roto i te whakarewa. Hei ārai i te chafing, ka whakauruhia e te kai whakarewa he ngongo hau ki tetahi pito o te paipa, ka mono i te pito o te paipa ki te purge valve. I hangaia hoki e rātou he pūhau i tetahi pito o te paipa. I te nuinga o te wā ka whakanohoia e rātou he rīpene ki te whakatuwheratanga o te hononga. I muri i te horoinga o te paipa, ka tangohia e rātou he wahi rīpene ki te hononga, ka tīmata te whakarewa, me te mahi anō i te tango me te whakarewa kia oti ra ano te pakiaka.
Whakakorehia te urupare kino. Ka nui te wā me te moni e pau ana i te whakamuri, ā, i ētahi wā ka tāpirihia he mano tāra ki tētahi kaupapa. Mā te huri ki tētahi tukanga GMAW poto matatau ka taea e te kamupene te mahi i ngā tuku pakiaka me te kore e hoki whakamuri i roto i te maha o ngā tono maitai kore waikura. He pai rawa te whakarewa i ngā maitai kore waikura raupapa 300 mō tēnei, i te mea ko te whakarewa i ngā maitai kore waikura takirua parakore teitei e hiahiatia ana he GTAW mō te tuku pakiaka.
Mā te pupuri i te iti o te wera e tomo mai ana ka āwhina i te pupuri i te ātete ki te waikura o te mea mahi. Ko tētahi huarahi hei whakaiti i te wera e tomo mai ana ko te whakaiti i te maha o ngā haerenga whakarewa. Ko ngā tukanga GMAW poto-ara iahiko matatau pērā i te whakatakotoranga whakarewa whakahaeretia (RMD®) ka whakamahi i te whakawhiti whakarewa tino whakahaeretia hei whakarite i te whakatakotoranga pata ōrite. Mā tēnei ka māmā ake te whakahaere a te kai whakarewa i te puna whakarewa, ka whakahaere i te whakaurunga wera me te tere whakarewa. Ko te iti o te wera e tomo mai ana ka taea e te puna whakarewa te tio tere ake.
Nā te whakawhiti whakarewa whakahaeretia me te tere o te tio o te puna whakarewa, ka iti ake te pōrearea o te puna whakarewa, ā, ka puta mārire te hau tiaki i te rama GMAW. Mā tēnei ka taea e te hau tiaki te haere mā roto i te pakiaka e kitea ana, ka panaia te hau ki waho, ā, ka ārai i te huka, i te waikura rānei i te taha raro o te whakarewa. He poto te wā e kapi ai tēnei hau nā te mea ka tere te tio o ngā puna wai.
Kua whakaatuhia e ngā whakamātautau kua tutuki i te tukanga GMAW ara iahiko poto kua whakarerekētia ngā paerewa kounga whakarewa, me te pupuri tonu i te ātete ki te waikura o te maitai kore waikura o te whakarewa pakiaka GTAW.
Me whai tiwhikete anō te kamupene mō te WPS hei whakarerekē i te tukanga whakarewa, engari mā tēnei momo whakawhiti ka nui ake te wā me te penapena utu mō ngā mahi hanga me ngā mahi whakatika hou.
Mā te whakarewa i ngā awa pakiaka tuwhera mā te whakamahi i te tukanga GMAW poto matatau ka puta he painga anō mō ​​te hua, te whai huatanga me te mātauranga mō te kaiwhakarewa. Kei roto i tēnei:
Ka whakakorea te tūponotanga o ngā awa wera nā te mea ka taea te tāpiri atu i te konganuku hei whakanui i te matotoru o te awa pakiaka.
He ātete tino pai ki ngā nekehanga teitei, iti hoki i waenga i ngā wāhanga paipa. Mā te whakawhiti whakarewa maeneene, ka taea e tēnei tukanga te whakakī i ngā āputa tae atu ki te 3⁄16 inihi.
He pumau tonu te roa o te pewa ahakoa te toronga o te hiko, ā, ka ea ai te uaua o ngā kaiwhakahaere e uaua ana ki te pupuri i te toronga pumau. Mā te puna whakarewa ngāwari ake te whakahaere me te whakawhiti whakarewa ōrite ka taea te whakaiti i te wā whakangungu mō ngā kaiwhakarewa hou.
He iti ake te wā kore mahi mō te whakawhiti tukanga. Ka taea te whakamahi i te waea me te hau tiaki kotahi mō ngā awa pakiaka, whakakī me te taupoki. Ka taea te whakamahi i te tukanga GMAW pāorooro mena kua whakakīia, kua katihia hoki ngā awa ki te 80% neke atu rānei ki te hau tiaki argon.
Mō ngā mahi whakamuri o te kowiri tira, he mea nui kia whai i ngā tohutohu matua e rima mō te whakawhiti angitu ki te tukanga GMAW ara iahiko poto kua whakarerekētia.
Horoia ngā paipa i roto, i waho hoki hei tango i ngā poke. Whakamahia he paraihe waea i hangaia mō te maitai kore waikura hei horoi i te tuara o te hononga kia 1 inihi te iti rawa mai i te taha.
Whakamahia he konganuku whakakī maitai kore waikura he nui te silicon pērā i te 316LSi, te 308LSi rānei. Mā te nui o te silicon ka mākū te puna whakarewa, ā, ka mahi hei tango i te waikura.
Mō ngā hua pai rawa atu, whakamahia he ranunga hau whakangungu rakau i hangaia mō te tukanga, pērā i te 90% heriuma, te 7.5% argon, me te 2.5% hauhā. Ko tētahi atu kōwhiringa ko te 98% argon me te 2% hauhā. Tērā pea he atu tūtohutanga a te kaiwhakarato hau whakarewa.
Mō ngā hua pai rawa atu, whakamahia te pito kōniko me te pito o te awa pakiaka hei kimi i te taupoki hau. He pai rawa te taupoki a te pūwero kōniko me te tohatoha hau kua whakauruhia.
Kia mōhio koe, mā te whakamahi i tētahi tukanga GMAW porowhita poto kua whakarerekētia, kāore he hau tāpiri, ka puta he iti noa te paru i te taha raro o te whakarewa. I te nuinga o te wā ka pakarukaru i te whakamataotanga o te whakarewa, ā, ka tutuki i ngā paerewa kounga mō te umanga hinu, ngā tipu hiko me ngā matū hinu.
He kaiwhakahaere hokohoko me ngā tono a Jim Byrne mā Miller Electric Mfg. LLC, 1635 W. Spencer St., Appleton, WI 54912, 920-734-9821, www.millerwelds.com.
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