Ko te rino kore waikura tētahi o ngā rauemi tino uaua ki te keri. Kāore i rite ki te rino ngāwari, ki te konumohe rānei, ka tere, ka kitea hoki te whiu i ngā tikanga ngoikore me ngā taputapu hē — i roto i ngā wahi pakaru, i ngā kōhao nunui, me ngā mata taratara. E whakamārama ana tēnei aratohu he aha te whanonga o te rino kore waikura pēnei, me te tikanga o tēnā mō te whiriwhiri i te mata keri tika, te whakatakoto i ngā tawhā tika, me te pupuri i te kounga kia rite puta noa i te wā whakaputa.
He aha i uaua ai te keri i te maitai kore waikura
Ko te mārama ki te raruraru ka tīmata i te rauemi tonu. Ko te maitai kore waikura — inā koa ko ngā momo austenitic pēnei i te 304 me te 316 — e rua ngā āhuatanga e uaua ake ai te keri i te nuinga o ngā konganuku kē atu.
Te whakapakeketanga o te mahi
Ina pāngia te maitai kore waikura e te ahotea ā-pūkaha — tae atu ki ngā kaha tapahi mai i te wiri — ka tere te whakapakeketanga o te rauemi i te rohe tapahi. Ka kiia tēnei ko te whakapakeketanga mahi, ā, ka tere ake te tupu i roto i ngā momo maitai kore waikura austenitic i te nuinga o ngā rauemi hangarau noa.
I roto i te mahi, ko te tikanga tēnei: ki te mutu te mahi a te mata keri, ki te whakaroa, ki te mirimiri rānei, kaua e tapahi ma, ka whakapakeke te mata i raro i te mata i roto i ngā hēkona. Kātahi ka tūtaki te tapahi e whai ake nei ki tētahi paparanga mārō atu i tērā o mua. Ka tere ake te pakaru o te taputapu, ā, ki te kore e whakatikahia, ka whakapakeketia te mahi ki roto i te kōhao — ka uaua haere te mahi i a ia e haere tonu ana.
Te kawe wera iti
Kāore te maitai kore waikura e kawe wera i te kino, ki te whakaritea ki te maitai ngawari, ki te konumohe rānei. I te wā e keri ana, ka puta he wera nui i te wā e tapahia ana. I roto i tētahi rauemi he pai te kawe wera, ka haria atu te nuinga o taua wera e te mea mahi me ngā maramara. I roto i te maitai kore waikura, ka kukū te wera ki te mata tapahi.
Ko te whakakotahitanga o te whakapakeketanga mahi me te kukū o te wera ka puta he raruraru whakararuraru: i te wera haere o te mata keri, ka tīmata te heke o tōna pakeke i te mata tapahi. Ka iti ake te whai hua o te tapahi a te mata ngohengohe, ka nui ake te waku, ka nui ake te wera — ā, ka haere tonu te huringa kia pakaru rā anō te mata.
Te whiriwhiri i te mata wiri tika: M2 me M35
Ko te mea tino nui i roto i te keri i te maitai kore waikura ko te rauemi o te mata keri. Ko ngā kōwhiringa e rua e whakamahia whānuitia ana i roto i ngā taiao ahumahi ko te maitai tere-rahi M2 me te M35. Ko te mārama ki te rerekētanga i waenganui i a rāua he mea nui ake i te nuinga o ngā kaihoko e mōhio ana.
M2 maitai tere-teitei
Ko te M2 te paerewa o te maitai tere-rahi, ā, ko te rauemi mata keri e tino hangaia ana i te ao. Ko tōna hanganga — tata ki te 6% tungsten, 5% molybdenum, 4% chromium, me te 2% vanadium — ka homai he mārō pai, he pakari tika, me te mahi tika puta noa i te whānuitanga o ngā rauemi noa.
Ko te herenga o te M2 mō te mahi kowiri tira ko tōna pakeke wera, e kiia ana ko te pakeke whero. E pā ana tēnei ki te kaha o te rauemi ki te pupuri i tōna pakeke i ngā pāmahana teitei. Ka tīmata te M2 ki te ngaro i te pakeke i te 550–600°C pea. I roto i te keri kowiri tira — inā koa i roto i ngā taiao whakaputa, i te wā rānei kāore i te rawaka te whakamatao — ka nui ake ngā pāmahana o te taha hou i tēnei awhe.
Ina ngawari te taha, ka mutu te tapahi, ka tīmata te mirimiri. Ka piki ake te waku, ka piki ake te wera, ka uaua ake te wero i te paparanga kua whakapakeketia, ā, ka heke tere te ora o te taputapu. Kāore te pakaru i te ohorere tonu — ka puta mai i te nuinga o te wā he ahua whāngai taumaha haere, he pupuhi nui haere i te putanga o te kōhao, me te heke haere o te diameter o te kōhao i mua i te pakaru o te mata.
maitai tere-teitei kobalta M35
E whakamahi ana te M35 i te hanganga turanga rite tonu ki te M2 me te tāpiri tata ki te 5% te konupora. Kāore te konupora e whai wāhi tika ki te tapahi — kāore e hanga i ngā karawiti, kāore hoki e tāpiri i te pakeketanga i te pāmahana rūma i tētahi ara whai tikanga. Ko tana mahi he whakau i te hanganga maitai i ngā pāmahana teitei, ka ara ake te wāhi ka tīmata te heke o te pakeketanga.
Ka mau tonu te pakeke whai hua o te M35 tae atu ki te 630–650°C pea. Ahakoa te rerekētanga o te 50–80°C ki te M2, he iti noa iho te āhua, engari he tino pāngia te roa o te ora o te taputapu e te pāmahana i roto i tēnei awhe. I roto i ngā whakamātautau whakatairite whakahaeretia i runga i te maitai kore waikura austenitic, e rua, e toru rānei ngā wā ka nui ake ngā kōhao e whakaputaina ana e te M35 mō ia moka i te M2 i raro i ngā āhuatanga ōrite — ā, he maha atu anō hoki ina uru te mahi ki ngā tapahi kua whakakorea, ngā tere whāngai rerekē, te whakamatao koretake rānei.
Ki ngā kaihoko, he māmā noa te whakatairite ōhanga: he nui ake te utu o ngā mata M35 mō ia waeine, engari ko te utu mō ia poka i keria — me te whakaaro ki te auau o te whakakapinga, te wā kore mahi a te mīhini, me ngā reiti whakakorenga mai i te kounga poka kino — he iti ake i roto i ngā horopaki whakaputa katoa e whakamahi ana i te kowiri tira.
Ina whakaaetia tonutia a M2
Kāore a M2 i te tino pai mō te maitai kore waikura. I raro i ngā āhuatanga e whai ake nei, ka taea e ia te mahi tika:
•He iti ngā tere tapahi me te nui o te wai whakamatao waipuke
•He keri wā poto, iti te rahinga, ka whai wā te mata ki te whakamatao i waenga i ngā kōhao
•He rauemi angiangi (≤3mm) ina pā te wiri ki te mea mahi mō te wā poto
•Ina kore e whai hua te M35 i ngā herenga utu, ā, he whānui te manawanui ki te kounga o ngā kōhao
I roto i te whakaputanga nui, i runga i ngā rauemi matotoru ake, i ngā wāhi rānei e tino hira ana te tika o ngā āhuatanga, ko te M35 te kōwhiringa pono ake.
Te tere tapahi me te tere whāngai
Ahakoa te tika o te rauemi mata, ka raru wawe tonu te mahi mena he hē ngā tawhā tapahi. Ko ngā taurangi e rua hei whakahaere ko te tere tapahi (e whakaatuhia ana ko te tere mata i roto i te m/min, ka hurihia rānei ki te RPM mō tētahi diameter kua hoatu) me te tere whāngai (te tere o te nekeneke o te keri i ia hurihanga).
Tere tapahi
Mō te maitai kore waikura, he iti iho te tere o te mata e taunakitia ana mō ngā mata keri HSS i te maitai ngawari. He aratohu whānui mō ngā momo austenitic (304, 316):
•M2 HSS: tere mata 10–15 m/min
•M35 cobalt HSS: tere mata 15–25 m/min
Ka hurihia ēnei ki te RPM penei: RPM = (tere mata × 1000) ÷ (π × diameter keri i roto i te mm). Ka oma te mata 10mm M35 i roto i te maitai kore waikura 316, e whai ana ki te 20 m/min, i te 637 RPM pea.
Ko te oma tere rawa te hapa tino kitea i te wā e keri ana i te maitai kore waikura. Ko te tere teitei ka whakaputa wera i te tere tere atu i te mea ka taea e te whakamatao te tango atu, me te tere atu i te mea ka taea e te maramara te kawe atu. Ka wera rawa te mata, ka ngaro te pakari o te taha, ā, ka pakaru wawe. Ko ngā kaiwhakahaere kua taunga ki te keri i te maitai ngawari, i te konumohe rānei, ka oma pinepine i te maitai kore waikura i ngā tere e rua, e toru rānei ngā wā teitei rawa.
Te tere whāngai
Me nui te tere whāngai kia tere tonu te tapahi o te mata, kaua e mirimiri. Mēnā he māmā rawa te whāngai, ka taea e te mata te reti i te mata kua whakapakeketia, me te kore e uru — ka whakaputa wera, me te kore e tango i te rauemi. Koinei te tino take o te whakapakeketanga wawe o te kōhao.
Ngā tere whāngai e taunakitia ana mō te maitai kore waikura (mō ia hurihanga): 0.05–0.10 mm mō ngā moka tae atu ki te 5mm te whānui; 0.10–0.20 mm mō te 5–15mm; 0.20–0.35 mm i runga ake i te 15mm. Koinei ngā tīmatanga — whakarerekētia i runga i te hanganga maramara kua kitea, te haruru tapahi, me te pāmahana i te pito o te keri.
Ko te maramara te tohu pono rawa atu mō te tika o ngā tawhā. Mēnā he maramara angiangi, he piri tonu te piko, e tohu ana i te tika o te tapahi. Mēnā he maramara roa, he aho, e tohu ana he māmā rawa te whāngai. Mēnā he paura, he koretake rānei te tae, e tohu ana i te wera nui.
Te whakamatao me te whakahinuhinu
Kāore he kōwhiringa mō te whakamahi i te wai whakamatao ina keri ana i te maitai kore waikura. E rua ngā mahi a tēnei: te tango i te wera mai i te rohe tapahi, me te whakahinuhinu i te hononga i waenga i ngā putorino mata me te pakitara o te kōhao hei whakaiti i te wera e puta mai ana i te waku.
Ko te tikanga tino whai hua mō ngā taputapu mīhini ko te wai whakamatao waipuke (he hinu wairewa i konatunatua ki te 8–10%). Mō ngā mahi keri ā-ringa, mō ngā mahi perehi keri rānei, me te kore he wai whakamatao waipuke, he mea nui te whakamahi i te wai tapahi tika ki te mata me te pūwāhi tomo i mua atu, i te wā hoki e keri ana. Me karo te keri maroke o te maitai kore waikura i roto i ngā horopaki katoa e whai tikanga ana te kounga o te kōhao, te roa rānei o te ora o te taputapu.
Me tae te puna wai whakamatao ki te rohe tapahi. Tērā pea kāore e taea e te wai whakamatao waipuke o waho i runga i ngā wahi mahi matotoru (neke atu i te 15–20mm) te whakamatao i te pito o te mata — i ēnei wā, me whakamahi taputapu wai whakamatao mā roto, me tango rānei te mata i ia wā hei whakakore i ngā maramara me te whakamatao.
Āhuahanga me te koki pūwāhi
Ko ngā mata keri paerewa he 118° te koki mō te whakamahinga whānui. Mō te maitai kore waikura, e rua ngā take e whai hua ake ai te āhua wehewehe 135°.
Tuatahi, ka whakakorea e te pito wehewehe te mata o te whao kei runga i ngā mata whenua paerewa. Kāore te mata o te whao e tapahi — ka pana, ka waru, ka whakaputa wera me te kore e tangohia te maramara. Ko te tango i te tohu ka tīmata te tapahi tonu i te wā e pā ana, ka whakaiti i te pikinga wera tuatahi me te ia o te reti.
Tuarua, mā te koki papaku ake o te 135° ka tohatoha ōrite ake ngā kaha tapahi puta noa i ngā ngutu tapahi, ka whakaitihia te kawenga mō ia wāhanga horahanga, ka whakapai ake hoki i te pakari o te mata i roto i ngā rauemi mārō, ngā rauemi whakapakeke-mahi rānei.
Mō te nuinga o ngā mahi keri kowiri tira, ko te mata kōhatu M35 wehewehe 135° te whakatakotoranga tīmatanga tika.
Te whakatūnga me te pupuri mahi
He mea nui ake te pakari o te whakatakotoranga mō te maitai kore waikura i ngā rauemi ngohengohe. Mā te wiri, te piko rānei i waenganui i te mata me te mea mahi ka mirimiri te mata i ētahi wā, kaua e tapahia tonutia, ka whakatairanga i te whakapakeketanga o te mahi me te pakaru o te taha.
Me mau pūmau ngā mea mahi, kaua e puritia ki te ringaringa. Me tirotiro te mata wiri mō te oma i mua i te whakahaerenga whakaputa — ahakoa he iti noa te oma ka tere ake te pakaru o ngā ngutu tapahi. He pai ake ngā toronga mata poto i ngā toronga mata roa; ka nui ake te piko i raro i te kawenga.
Mō te whakaurunga kōhao i roto i te pepa kowiri tira angiangi, ka whakaitihia te tere o te reti i te tīmatanga o te tapahi mā te tohu poka i waenganui, mā te kōhao ārahi rānei. Mō te putanga kōhao, ka āraihia te pakaru me te haehae o te rauemi e pā ana ki te pakaru o te mata.
Whakarāpopototanga: ngā taurangi matua hei whakahaere
•Rauemi mata: whakamahia te M35 cobalt HSS mō ngā keri whakaputa i roto i te maitai kore waikura. He pai te M2.
•Tere tapahi: kia pōturi ake te oma i tō te maitai ngawari. Ko te wera te tino take o te pakaru.
•Te tere whāngai: kia mau tonu te kai pai i ngā wā katoa. Mā te mirimiri māmā ka whakapakeke.
•Wai whakamatao: tāpirihia tonutia ki te rohe tapahi. Ka whakapotohia te roa o te ora o te taputapu mā te keri maroke.
•Āhuahanga: He pai ake te pūwāhi wehewehe 135° i te paerewa 118° mō te kowiri tira.
•Pakari: piri pūmau, whakaitihia te oma, karohia ngā toronga roa.
Ehara i te mea uaua te keri i te kowiri tira — ka uaua ina whiriwhiria te taputapu, ngā tawhā rānei mō tētahi rauemi rerekē. Mēnā he tika te whakatakotoranga o te mata, he tika te tere me te whāngai, me te tono whakamatao ōrite, ka taea te whakahaere katoa i te tauine whakaputa.
Wā tuku: Mei-06-2026