27.13.1. Dab tsi yuav tsum tau sau tseg thaum chamfering?

(1) Layering thiab IncaltySwhen ua cov yeeb nkab xaus, cov neeg ua haujlwm yuav tsum ua tib zoo xyuas seb puas muaj ib qho txheej txheem lossis cov yeeb nkab xaus. Cov kav dej steel tsis raug tso cai kom muaj txheej los yog suav txuas rau cov yeeb nkab kawg lossis Bevel ntsej muag uas tshaj 6.4mm hauv kev hloov pauv. Rau cov yeeb nkab xaus tshaj li 6.4mm, re {{5 5}} Txoj kev txiav tawm tau ntau dua li 35hrc (327hbw / 345hv10). Yog tias tam sim no, lawv yuav raug tshem tawm. (3) Bevels thiab blunt edgesunless Tus neeg yuav khoom muaj ntau dua li 3.2mm yuav tsum tau beveled ntawm lub kaum ntawm 30℃rau 35 degree; Lub blunt ntug yuav tsum yog 1.6 ± 0.8mm, ntsuas nrog rau cov kab sib tshuam rau cov yeeb nkab lub axis ntawm lub kaum ob lub. Cov yeeb nkab kawg bevel yuav tsum tsis pub tshaj 1.6mm. Rau GB / T3091 cov khoom lag luam thiab SY / T5037 nrog cov yeeb nkab taub d ntau dua lossis sib npaug ntawm cov yeeb nkab nyob rau hauv nruab nrab ntawm cov yeeb nkab.