Indlela yoVavanyo loBulukhuni kwiMigangatho yeHlabathi yeeFayile zeNsimbi: ISO 234-2:1982 IiFayile zeNsimbi kunye neeRasp

Kukho iintlobo ezininzi zeefayile zentsimbi, kuquka iifayile zomlungisi, iifayile zesarha, iifayile zokubumba, iifayile ezinemilo ekhethekileyo, iifayile zomenzi weewotshi, iifayile zomenzi weewotshi ezikhethekileyo, kunye neefayile zomthi. Iindlela zabo zokuvavanya ubulukhuni zihambelana kakhulu nomgangatho wamazwe ngamazwe we-ISO 234-2:1982 Iifayile zeNsimbi kunye neeRasps — Icandelo lesi-2: Iimpawu zokusika.

Umgangatho wehlabathi uchaza iindlela ezimbini zokuvavanya: indlela yokuqina kweRockwell kunye nendlela yokuqina kweVickers.

1. Kwindlela yokuqina kweRockwell, kusetyenziswa isikali seRockwell C (HRC), kwaye imfuneko yokuqina idla ngokuba ngaphezulu kwe-62HRC. Xa ubunzima buphezulu, isikali seRockwell A (HRA) singasetyenziselwa uvavanyo, kwaye ixabiso lokuqina lifumaneka ngokuguqulwa. Ubunzima besiphatho sefayile (indawo ebalelwa kwisithathu kwisihlanu sobude obupheleleyo ukusuka kwincam yesiphatho) akufuneki ibe ngaphezulu kwe-38HRC, kwaye ubunzima befayile yomthi akufuneki bube ngaphantsi kwe-20HRC.

2. Isivavanyeli sobulukhuni beVickers singasetyenziselwa uvavanyo, kwaye ixabiso lobulukhuni elihambelanayo liya kufunyanwa ngokuguqulwa emva kovavanyo. Ubulukhuni beVickers bufanelekile ukuvavanywa kweefayile zentsimbi ezineeleya ezincinci okanye emva konyango lomphezulu. Kwiifayile zentsimbi eziphathwe ngonyango lobushushu bomphezulu okanye unyango lobushushu bekhemikhali, ubulukhuni bazo buya kuvavanywa kwindawo engenanto igudileyo ukusuka kwi-5 mm ukuya kwi-10 mm ukusuka kwifayile yokugqibela esikiweyo.

Ubunzima bencam yamazinyo bufanele bube phakathi kwe-55 HRC kunye ne-58 HRC, efanelekileyo ukuvavanywa ngendlela yobunzima beVickers. Ukuba kukho indawo efanelekileyo, i-workpiece ingabekwa ngqo kwi-workbench ye-Vickers hardness tester yovavanyo. Nangona kunjalo, uninzi lwe-workpieces alunakulinganiswa ngokuthe ngqo; kwiimeko ezinjalo, kufuneka silungiselele iisampulu ze-workpieces kuqala. Inkqubo yokulungiselela isampuli ibandakanya umatshini wokusika i-metallographic, umatshini wokugaya nokupholisha i-metallographic, kunye ne-metallographic mounting press. Emva koko, beka iisampulu ezilungisiweyo kwi-workbench ye-Vickers hardness tester ukuze ivavanywe.

Kufuneka kuqatshelwe ukuba uvavanyo lobunzima besiphatho sefayile lunokwenziwa kuphela xa umphezulu ucutshungulwe ukuze kuhlangatyezwane neemeko zovavanyo; ngaphandle kwemimiselo yalo mgangatho, uvavanyo lobunzima beefayile zentsimbi kufuneka luhambelane nemimiselo ye-ISO 6508 kunye ne-ISO 6507-1.