Tikanga tukatuka o te mata pēhi
1. Kia kuru te mata
Tikanga pēhi i te mata mate i te wā kotahi: Tuhia te pereti kia 30 nekehanga ki te maripi piko 30 nekehanga, kātahi ka whakawhāitihia te mata piko.
2. Piko 180 nekehanga:
Tikanga piko 180 nekehanga: Tuhia te pereti kia 30 nekehanga ki te maripi piko 30 nekehanga, kātahi ka whakaparahakohia te taha piko, kātahi ka unuhia te pereti o muri.
Te whānuitanga o te taha mate
a) Me piko te mata mate kia rua ngā wā. Tuatahi, pikohia kia 30° ~ 45° ki te maripi koi 30° me te awaawa-V hōhonu, kātahi ka pēhi kia papatahi ki te mata whakapapatahi. Ko te whānuitanga o te mata mate me ngā matotoru rauemi rerekē: 0.5 < T < 2.0
b) Ko te roa (L) o te taha pēhi e pā ana ki te matotoru o te rauemi me te hohonutanga whakaurunga V awaawa. Ina 0.5 < T ≤ 1.5, ka tīpakohia te awaawa whakaurunga V6, ā, ko te L min > 5T + R (L min > 6); Ina 2.0 ＜ T < 2.5, tīpakohia te V10 hei whakauru i te awaawa hohonu, L min ≥ 5T + R (L min > 9); Ko te roanga taha mate L mōrahi o ngā mea e rua i runga ake nei ko ≤ 14mm.
c) Ko te roa L o te taha mate kua pēhia i muri i te piko whakamuri ka herea e te hohonu whakaurunga V awaawa, L min ≥ 11mm
d) Kaua e tino poto te tawhiti mai i te kōhao mata mate ki te mata piko, ki te kore ka rerekē te āhua o te kōhao i te huringa o te koki i te wā e piko ana: l1min > 0.7V
Wā tuku: Akuhata-02-2021