Te whiriwhiri i te kounga teiteingā wāhanga hanganga maitaiKa whakatau i te haumaru, te roa o te mahi, me te utu katoa o te kaupapa. Me arotake e ngā miihini te kounga o ngā rauemi, te tika o te wāhanga, te kounga o te hanga, me ngā pūnaha tiaki. Ka pāngia e ia āhuatanga te kaha kawenga, te ātete ki te ngenge, me ngā hiahia tiaki.
E ai ki ngā raraunga a te World Steel Association, neke atu i te 1.8 piriona tāne ia tau te whakamahinga o te maitai o te ao mō ngā mahi hanga. He maha ngā wā ka hono atu ngā pakaru o te maitai hanganga ki te kōwhiringa wāhanga ngoikore, kaua ki ngā hapa hoahoa. He maha ngā wā ka piki ake ngā utu huringa ora o te kōwhiringa wāhanga ngoikore mā te neke atu i te 20 ōrau. Ka whakaitihia e te kōwhiringa pai te mōrearea hanganga, ā, ka whakapai ake i te whai huatanga o te hanga.
Te taumata rauemi o ngā wāhanga hanganga maitai
Ko te kounga o ngā rauemi te tūāpapa o te kounga o ngā wāhanga. He rerekē ngā paerewa o ia whenua, o ia rohe mō ngā taumata maitai. Hei tauira, ko te Q235 me te Q355 e whakamahia whānuitia ana i roto i te maitai hanganga i Haina. I te Hononga o Amerika, ko te ASTM A36 me te ASTM A572 Grade 50 e whakamahia whānuitia ana. Ko ngā wāhanga EN S355 ngā mea tino noa i te mākete Pākehā.
I te whanaketanga o te ao pakihi, ka nui haere ngā hoko whakawhiti-rohe. Hei whakaoti i te raruraru o ngā paerewa rerekē o ngā hua me ngā rauemi mata. Me whakarato e ngā kaiwhakarato he tiwhikete rauemi whai mana hei whakarite kia tutuki te kaha tuku, te kaha kume me te roa o ā rātou hua ki ngā paerewa a te kaihoko. Ko te kaha tuku o te maitai Q235 kāore i raro iho i te 235Mpa, ā, he rite te maitai Q355 ki te EN S355, e eke ana ki te 355MPa. Ko te kaha tuku o te ASTM A36 kāore i raro iho i te 250Mpa, ā, ko te ASTM A572 Grade 50de tata ki te 345Mpa.
Te rahi whakawhiti-wāhanga me te tika o te āhuahanga o ngā wāhanga hanganga maitai
Ko te rahi o te wāhanga whakawhiti te tawhā matua e whakatau ana i te kaha kawe, te kaha kume me te pakari o te wāhanga. Ko te tango i te mea hurihuri weramaitai āhua-HHei tauira, ina iti iho i te 400mm te teitei, ko te whānui o te flange e whakaaetia ana ka whakahaeretia i roto i te ±2mm, ā, kaua e neke ake i te ±0.5mm te matotoru o te tukutuku. He mea nui anō hoki te tika o te wāhanga, ā, kaua e neke ake i te 1/1000 o te roa o te wāhanga te rerekētanga. Hei tauira, mō te kurupae 12-mita te roa, me iti iho i te 12mm te rerekētanga piko.
Ka pā te tika o te āhua o ngā wāhanga ki te pai o te kawe me te uaua o te tāutanga o ngā wāhanga. He tino teitei ngā whakaritenga mō te tika o te tāutanga o ngā whare hanganga rino i te wā hanga. Mā te hapa tika o te wāhanga i te rahi, i te kōhao rānei o te whakairinga ka kore e pai te tāutanga o te wāhanga e ai ki te hoahoa. Ehara i te mea me whakarerekē noa te rōpū hanga i ngā wāhanga i te papaanga, ka nui ake te wā me te utu o te kaupapa, engari ka nui ake hoki ngā mōrearea me ngā mōrearea haumaru o te whare.
Ka tika te whiriwhiri i tētahi kaiwhakarato nui ake. Nā te mea ko ngā kaiwhakarato nui, kounga teitei, he maha ā rātou mīhini whakamātautau ultrasonic, mīhini tapahi laser, keri CNC 3D me ētahi atu taputapu. Ka taea e ēnei taputapu te whakaiti i te hapa tika o ngā wāhanga i roto i te whakarewa me te miihini. Ka taea te whakahaere i te hapa rahi tapahi i roto i te ±1mm, ā, kāore te hapa tūranga keri e neke ake i te ±0.5mm. I taua wā anō, ko ngā kaiwhakarato nui he maha ā rātou rōpū kaihoahoa mātau, ka taea te karo i ngā mōrearea me ngā raruraru i mua.
Te maimoatanga ārai-waikura o ngā wāhanga hanganga maitai
I te mea he ngāwari te waikura o ngā hua rino, he mea nui te maimoatanga ārai-waikura ki te ine i te roa o te mahi me te kounga o ngā wāhanga hanganga rino. I te nuinga o te wā, ka wehea te maimoatanga ārai-waikura o ngā wāhanga hanganga rino kia toru ngā hononga, arā, te paninga ārai-waikura, te pupuhi pupuhi me te tango waikura, me te paninga ārai-waikura.
Ko te whakakākahu wera he tikanga tiaki noa mō te maitai. Ko te matotoru o te paparanga konutea he 65 ki te 85µm te tikanga, ka taea te tiaki mō te neke atu i te 30 tau i roto i te taiao waikura āhua. Ko te tikanga ka whakaratohia tēnei hononga e te kaihanga rauemi mata maitai. I muri i te otinga o te hanga, me pupuhi te kaihanga i ngā wāhanga. Mā te pānga tonu o te pupuhi pupuhi hurihuri tere-teitei, ka tihorea te paru me te waikura i runga i te mata o ngā wāhanga. I taua wā anō, ka whakanui ake tēnei tukanga i te taratara o te mata o te wāhanga, ka whakarei ake hoki i te piri o te paninga.
Ko te rehu peita te taahiraa whakamutunga o te maimoatanga ārai-waikura o ngā hanganga maitai. Ka whakamahia e ngā kaimahi ngā paninga rerekē hei rehu i ngā wāhanga i ngā wā maha. Ko ngā pūnaha paninga kounga teitei he mea tito mai i ngā paparanga maha pērā i te paninga epoxy, te peita waenga me te paninga polyurethane, me te matotoru katoa o te 200µm. Mā tēnei pūnaha ka tiakina te mata o te wāhanga e te paninga ki te whānuitanga nui rawa atu, ā, ka taea te whakarite i te huringa ārai-waikura o te 15-20 tau.
Ngā wāhanga hononga e kore e taea te wareware
He maha ngā wā ka whakahaerea e ngā wāhanga hononga te pono o te hanganga. Me rite ngā pūtu, ngā pereti, me ngā punga ki ngā tono kawenga. Ko ngā pūtu kaha teitei te tikanga e whai ana i ngā paerewa ASTM A325, A490 rānei. Ko te kaha kume iti rawa o ngā pūtu ASTM A325 he 830 MPa. Ka eke ngā pūtu A490 ki te 1,040 MPa. Whakamahia ngā hononga paheke-tino mō ngā kawenga hihiri. Me nui ake i te 0.35 ngā tauwehenga waku mata mō ēnei hononga. Ka eke ngā kaha kume mō ngā pūtu M20 A325 ki te 172 kN.
Me rite, me nui ake rānei ngā pereti hononga i te kounga matua o te maitai. Ko te matotoru o te pereti i roto i ngā whare ahumahi kei waenga i te 8 ki te 25 mm. Me ātete ngā pūtu punga ki te kume me te kutikuti. Ko te kaha tuku o ngā pūtu punga taumata 8.8 he 640 MPa. Ko te tawhiti taha tika ka ārai i te pakaru o te raima. Ko te tawhiti taha iti rawa me rite ki te iti rawa e whā ngā diameter pūtu. Mā te whiriwhiri tika i ngā wāhanga i ngā hononga ka whakaiti i te mōrearea o te pakaru o te hononga mā te neke atu i te 40 ōrau i roto i ngā huihuinga tino kino.
Wā tuku: Hanuere-04-2026