I te hanganga i roto i tētahi mata whatu whakamua, ka pā te pēhanga o te kaipupuri kau, ngā āhuatanga pēhanga, me ngā rauemi mata ki te kaha ki te whiwhi hua totoro pumau me te kore e miro.
Q: Kei te tuhi kapu mātou mai i te maitai kore waikura kounga 304. I te pito tuatahi o tā mātou mate ahu whakamua, ka tuhi mātou ki te hohonu o te 0.75 inihi. Ina tirohia e au te matotoru o te taha o te flange o te papa, ka taea e te rerekētanga mai i tetahi taha ki tetahi taha te eke ki te 0.003 inihi. He rerekē ia patunga, ā, kāore e puta i te wāhi kotahi. Kua kōrerotia mai ki ahau he mea e pā ana ki te tukatuka rauemi mata, ko te taha o waho pea o te koiri matua. Me pēhea e whiwhi ai mātou i tētahi kapu āhua rite tonu me te kore e miro?
A: E kite ana ahau kei te ara ake i tō pātai ētahi pātai e rua: tuatahi, ko ngā huringa ka puta mai i te tukanga rota, tuarua, ko ngā rauemi mata me ō rātou whakaritenga.
Ko te pātai tuatahi e pā ana ki ngā hapa taketake o te hoahoa taputapu, nō reira, me arotake tātou i ngā kaupapa matua. Ko te miro ā-wā me ngā panoni matotoru i muri i te kume i runga i ngā karapa kapu e tohu ana i te korenga o ngā papa taputapu i roto i tō teihana kume mate ahu whakamua. Ki te kore e kite i tō hoahoa mate, me whakaaro ahau ka tutuki i tō kume kume me ngā radius mate me ō rātou āputa ngā tawhā hoahoa paerewa katoa.
I te tuhi hōhonu, ka whakatakotoria te papa kore ki waenganui i te mate tuhi me te pupuri papa kore, i te wā e kumea ana e te wero kume te rauemi ki roto i te mate tuhi, ka kumea huri noa i te radius kume hei hanga i te anga. He nui te waku i waenganui i te mate me te pupuri papa kore. I roto i tēnei tukanga, ka pēhia te rauemi ki te taha, koinei te take o te miro me te toronga radial o te pupuri papa kore ki te rere o te rauemi. Mena he nui rawa te pēhanga pupuri, ka pakaru te rauemi i raro i te kume a te wero totoro. Mena he iti rawa, ka puta te miro.
He rohe kei waenganui i te whānui o te anga me te whānui o te anga kore e taea te neke atu mō te mahi tuhi angitu. Ka rerekē tēnei rohe i runga i te ōrau roa o te rauemi. Ko te ture whānui ko te 55% ki te 60% mō te tuhi tuatahi me te 20% mō ia tuhi i muri mai. Ko te Pikitia 1 he tātai paerewa mō te tatau i te pēhanga o te kaipupuri anga kore e hiahiatia ana mō te totoro (ka tāpirihia e au i te iti rawa 30% o te kaha tāpiri hei tauwehe haumaru, ka taea te whakaiti mēnā e tika ana, engari he uaua ki te whakanui ake i muri i te otinga o te hoahoa).
Ko te pēhanga o te pupuri pātea p ko 2.5 N/mm2 mō te maitai, 2.0 ki te 2.4 N/mm2 mō ngā koranu parahi, me te 1.2 ki te 1.5 N/mm2 mō ngā koranu konumohe.
Ko ngā rerekētanga o te matotoru o te flange e tohu ana kāore i te tino kaha te hoahoa o tō taputapu. Me matotoru ō pūtu pokepoke kia tu atu i te kukume me te kore e piko. Me maitai totoka te tautoko i raro i te turanga mate, ā, me nui ngā pine aratohu taputapu kia kore ai e nekehia te taha o ngā taputapu o runga me raro i te wā e totoro ana.
Tirohia hoki ō purongo. Mena kua tawhito, kua paru hoki ngā aratohu pēhi, ahakoa he kaha tō taputapu – kāore koe e angitu. Tirohia te kiriata pēhi kia tino tika, kia tapawhā hoki te roa katoa o te whiu o te pēhi. Manatokohia kei te tātarihia, kei te tiakina hoki tō hinu whakahinuhinu, ā, kua pumau te nui o te taputapu me te tūranga o te pūwero. Tirohia pai ngā taputapu tā katoa kia tika ai te mutunga o te mata, te paninga me te ōritetanga. Ā, kia aro nui ki ngā radius tuhi; me tino tika te āhua me te mutunga o te mata.
Ahakoa te whakaaro o ngā kaihoko he mea whakawhitiwhiti te 304L me te paerewa 304, ko te 304L te kōwhiringa pai ake mō te tuhi. Ko te L he tohu waro iti, e hoatu ana ki te 304L he kaha whakaputa o te 0.2% o te 35 KSI me te 304 o te 0.2% o te 42 KSI. Me te whakahekenga 16% o te kaha whakaputa, he iti ake te kaha e hiahiatia ana e te 304L hei whakaputa i te hanga me te whakatakoto i te āhua kua hangaia. He māmā ake te whakamahi.
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