Kune mhando dzakawanda dzemafaira esimbi, anosanganisira mafaira e fitter, mafaira e saw, mafaira e shaping, mafaira ane chimiro chakasarudzika, mafaira e watchmaker, mafaira e special watchmaker, uye mafaira ehuni. Nzira dzavo dzekuongorora kuomarara dzinonyanya kuenderana ne standard yepasi rose ISO 234-2:1982 Steel Files and Rasps — Chikamu 2: Hunhu hweCheka.
Mutemo wepasi rose unotsanangura nzira mbiri dzekuyedza: nzira yeRockwell hardness uye nzira yeVickers hardness.
1. Panzira yekuomarara kweRockwell, chikero cheRockwell C (HRC) chinowanzo shandiswa, uye chinodiwa chekuomarara chinowanzo pfuura 62HRC. Kana kuomarara kwacho kwakakwira, chikero cheRockwell A (HRA) chinogonawo kushandiswa pakuyedza, uye kukosha kwekuomarara kunowanikwa kuburikidza nekushandura. Kuomarara kwemubato wefaira (nzvimbo inoverengera zvikamu zvitatu muzvishanu zvehurefu hwese hunotanga kubva pamuromo wemubato) hakufanirwe kunge kwakakwirira kupfuura 38HRC, uye kuomarara kwefaira rehuni hakufanirwe kunge kwakaderera kupfuura 20HRC.
2. Muchina wekuyedza kuomarara weVickers unogona kushandiswawo pakuyedza, uye kukosha kwekuomarara kunoenderana kuchawanikwa kuburikidza nekushandura mushure mekuyedza. Kuomarara kweVickers kwakakodzera kuyedza mafaira esimbi ane zvidimbu zvitete kana mushure mekugadzirisa pamusoro. Kune mafaira esimbi anorapwa nekupisa kwepamusoro kana kurapwa nekupisa kwemakemikari, kuomarara kwawo kunofanira kuyedzwa panzvimbo isina chinhu yakatsetseka 5 mm kusvika 10 mm kubva pakachekwa faira rekupedzisira.
Kuoma kwemuromo wezino kunofanira kuva pakati pe55 HRC ne58 HRC, iyo yakakodzera kuyedzwa nenzira yeVickers hardness. Kana paine nzvimbo yakakodzera, workpiece inogona kuiswa zvakananga pabench reworkpiece reVickers hardness tester rekuyedza. Zvisinei, workpieces zhinji hadzigone kuyerwa zvakananga; muzviitiko zvakadaro, tinofanira kutanga tagadzirira sampuro dzeworkpieces. Maitiro ekugadzirira sampuro anosanganisira metallographic cutting machine, metallographic grinding & polishing machine, uye metallographic mounting press. Wobva waisa sampuro dzakagadzirirwa pabench reworkpiece reVickers hardness tester kuti dziyedzwe.
Zvinofanira kucherechedzwa kuti kuyedzwa kwekuoma kwemubato wefaira kunogona kuitwa chete kana pamusoro pacho pagadziriswa kuti pasave nemamiriro ekuyedzwa; kunze kwezviri mumutemo uyu, kuyedzwa kwekuoma kwemafaira esimbi kunofanirawo kutevedzera zviri muISO 6508 neISO 6507-1.
Nguva yekutumira: Gunyana-24-2025
