Ko te Hanga Hurihuri Matao (Cold Roll Forming) he tukanga hanga e hurihuri tonu ana i ngā koiri maitai i roto i ngā roera hanga maha-haere kua whirihorahia kia puta ai he kōtaha o ngā āhua motuhake.
(1) Ka whakamahia e te wāhanga hanga taratara te whakakotahitanga o ngā rōra tiritahi me ngā rōra whakakapinga. Ina whakarerekētia te whakatakotoranga hua, kāore e hiahiatia kia whakakapia ngā rōra o ētahi tūnga, ka taea ai te penapena i ētahi rahui rōra.
(2) Ngā pepa rōra whakakotahi mō ngā rōra papatahi, e ono ngā tūnga o te wāhanga hanga taratara, he whakarara te whakaritenga o te rōpū rōra poutū, he iti te rahinga o ngā rōra hurihuri, ā, ka whakaitihia te taumaha o ngā rōra o te mīhini hanga rōra tuku iho mā te neke atu i te 1/3, ā, he kiato ake te hanganga taputapu.
(3) He māmā te āhua o te pihi hurihuri, he ngāwari ki te hanga me te whakatika, ā, he teitei te tere whakamahi anō i te hurihuri.
(4) He pumau te hanga, he kaha te whakamahinga o te mira hurihuri ki te hanga i ngā ngongo angiangi me ngā ngongo pakitara-muri, ā, he whānui te whānuitanga o ngā whakatakotoranga hua.
He tukanga hou, he hangarau hou hoki te hanga pepa whakarewa e penapena rauemi ana, e penapena pūngao ana, e whai hua ana hoki. Mā te whakamahi i tēnei tukanga, ehara i te mea ka taea te whakaputa hua maitai wāhanga kounga teitei anake, engari ka taea hoki te whakapoto i te huringa whanaketanga hua, te whakapai ake i te pai o te whakaputa, ā, nō reira ka pai ake te whakataetae mākete o ngā umanga.
I roto i te haurua rautau kua pahure ake nei, kua whanake te hanga takai matao hei tikanga hanga whakarewa tino whai hua. 35%~45% o te maitai rīpene i hurihia i Amerika Te Raki ka tukatukahia hei hua mā te piko matao, he nui ake tēnei i te maitai e whakamahia ana i roto i te umanga motuka.
I ngā tau tata nei, kua whānuitia te whakamahinga o ngā hua rino hanga-matao hei wāhanga hanganga nui i roto i ngā mara maha pērā i te hanga, te hanga waka, te hanga kaipuke, te ahumahi hikohiko me te hanga mīhini. Ko āna hua mai i ngā ara ārahi noa, ngā tatau me ngā matapihi me ētahi atu wāhanga hanganga ki ētahi kōtaha motuhake i hangaia mō ngā kaupapa motuhake, me te whānuitanga o ngā momo. He pai ake te mahi wāhanga mō ia taumaha o te rino hanga-matao i ērā o ngā hua rino huri-wera, ā, he teitei te mutunga o te mata me te tika o ngā āhuatanga. Nō reira, mā te whakakapi i te rino huri-wera ki te rino hanga-matao ka taea te whakatutuki i ngā pānga rua o te penapena rino me te pūngao, nō reira kei te hiahia te tangata ki te rino hanga-matao. Kua aro nui te whanaketanga o te rino piko. Ko te hiahia tonu o ngā kaiwhakamahi mō te momo, te whakatakotoranga me te kounga o ngā hua rino hanga-matao e whakatairanga ana i te whanaketanga tere o te hangarau hanga-matao.
Wā tuku: Maehe-09-2023
