He aha i kore ai e taea te tirotiro i ngā whakarewa maitai kore waikura kotahi-haere mā te whakamahi i te FCAW? Ka tirohia e David Meyer rāua ko Rob Koltz ngā take mō ēnei hapa. Getty Images
P: Kei te whakatika mātou i ngā waru maitai kua whakarewahia i roto i te pūnaha whakamaroke i roto i te taiao mākū. Kāore i rahua ā mātou whakarewa i ngā tirotiro nā te mea he porous, he tapahi raro me ngā whakarewa pakaru. Ka whakarewahia e mātou te A514 ki te A36 mā te whakamahi i te diameter 0.045″, i ngā tūranga katoa, he 309L te matua, 75% Argon/25% Waro Dioxide hei ātete pai ake i te kakahu.
I whakamātau mātou i ngā hikohiko maitai waro, engari i tere rawa te pakaru o ngā whakarewa, ā, i kitea e mātou he pai ake te mahi a te maitai kore waikura. Ka mahia ngā whakarewa katoa i te tūranga papatahi, 3/8 inihi. Nā te iti o te wā, i mahia ngā whakarewa katoa i te wā kotahi. He aha te mea ka raru ai ā mātou whakarewa?
Ko te nuinga o te wā ka puta te tapahi raro nā ngā tawhā whakarewa i waho o te whakaritenga, te tikanga whakarewa hē rānei, ngā mea e rua rānei. Kāore e taea e mātou te kōrero mō ngā tawhā whakarewa nā te mea kāore mātou e mōhio ki a rātou. Ko ngā tapahi raro e puta ana i te 1F ka puta mai i te nui rawa o te mahi poka whakarewa, te tere rawa rānei, te puhoi rawa rānei o te haere.
I te mea kei te ngana te kaiwhakarewa ki te whakatakoto i te 3/8″. Ko te tūponotanga o te nui rawa o te rama te take pea o te whakarewanga o te miro kotahi-haerenga me te waea iti-te-matua. Heoi, te āhua nei kei te whakamahi i te taputapu hē i te mahi, ehara i te raruraru hangarau, koia te take.
Ko te pūngao i puta mai i ngā poke o te whakarewa, te ngaronga, te nui rawa rānei o te hau tiaki, te nui rawa rānei o te mimiti makuku o te waea kua whakapūmauhia te hau. I kī koe he mahi whakatika tēnei i ngā mea mākū i roto i te whakamaroke, nō reira, ki te kore ngā whakarewa e horoia pai, koinei pea te tino take o ngā āputa.
Ko te konganuku whakakī e whakamahia ana e koe he waea kua whakapūmauhia te pūtake, he pūnaha para tio tere tō ēnei momo waea. He mea tika tēnei hei tautoko i te puna whakarewa ina whakarewahia poutū ki runga, ki runga rānei. Ko te ngoikoretanga o te para tio tere ko te totoka i mua i te puna whakarewa i raro iho. Mena kei te tukuna tonutia ngā hau, ka mau tonu, ā, ka puta mai i muri mai i roto i te āhua o ngā pūwero, i ngā ara kutukutu rānei o te mata. Ka nui ake tēnei ina whakarewahia i roto i te tūranga papatahi me te waea iti te diameter, me te ngana ki te whakatakoto i tētahi whakarewa nui i roto i te kotahi haerenga, pērā i tō tono.
He maha ngā take ka pā te pakaru o te whakarewa i te tīmatanga me te mutunga o te whakarewa. Nā te mea kei te whakatakoto koe i tētahi pirepire nui me te waea iti te whānui, tera pea ka pāngia koe e te korenga o te hanumitanga (LOF) i te pūtake o te whakarewa. He mea noa te pakaru o te whakarewa nā te nui o te ahotea whakarewa toenga me te LOF i te pūtake.
Mō tēnei rahi waea, me whakamahi koe i ngā whitinga e rua, e toru rānei hei whakaoti i te 3/8 o te inihi. Kāore he hononga mō ngā hononga. Tērā pea ka tere ake te hanga i ngā hononga kore hapa e toru i te hanga i tētahi hononga hapa kotahi, kātahi ka whakatika.
Heoi, ko tētahi atu take pea ka nui ake te pānga ki te pakaru o te whakarewa ko te taumata hē o te ferrite i roto i te whakarewa, koinei te tino take o te pakaru. I whakawhanakehia te waea 309L mō te whakarewa i te kowiri tira ki te maitai waro, kaua ki te maitai waro ki te maitai waro. Ko te matū whakarewa motuhake o tēnei hua e whai whakaaro ana ki ētahi waimehatanga o te konganuku turanga mō ngā konganuku turanga e rua. Nō reira, i roto i ngā tono kowiri tira ki te maitai waro, ko ētahi koranu i ahu mai i te kowiri tira ka āwhina i te taurite i te hanganga matū me te whakaputa i ngā rahinga ferrite e whakaaetia ana. Mā te whakamahi i te konganuku whakakī me te 50% o te ferrite, pērā i te 312, te 2209 rānei, ka whakakorea te tūponotanga o te pakaru nā te iti o te ihirangi ferrite.
Ko te huarahi pai ki te whakarato i te ātete kakahu pai ko te whakarewa i te hononga ki te hiko waro paerewa, ki te hiko kowiri tira rānei, kātahi ka tāpirihia he paparanga hiko mata. Heoi, i kōrero koe he tino iti ngā herenga wā kei raro i a koe, ā, kāore e taea te whakamahi i tētahi āhuatanga whakarewa maha-haere.
Ngāna ki te huri ki tētahi waea he nui ake te diameter, pērā i te 1/16 inihi, he nui ake rānei. He mea pai te whakamahi i tētahi waea he hau-hau-hau, he pai ake te horoi i te whakarewa me te tiaki i te rere o te hau i ngā waea kāore i te hau-hau. Heoi, hei utu mō tētahi waea tūnga-katoa, ko tētahi waea tūnga papatahi me te whakapae anake ka taea te whakaiti i te porosity, te whai kutukutu rānei. Me huri anō hoki te konganuku whakakī mai i te 309L ki te 312, ki te 2209 rānei.
Ko te WELDER, i mua ko Practical Welding Today, e whakaatu ana i ngā tāngata tūturu e hanga ana i ngā hua e whakamahia ana e tātou, e mahi tahi ana hoki i ia rā, i ia rā. Neke atu i te 20 tau tēnei maheni e mahi ana ki te hapori whakarewa i Amerika Te Raki.
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