Momwe mungayang'anire kuwongoka kwa granite straightedge?

1. Perpendicularity ya mbali yowongoka motsutsana ndi malo ogwirira ntchito: Ikani granite molunjika pa mbale yathyathyathya. Dulani dial gauge, yokhala ndi sikelo ya 0.001mm, kudzera pa bar yozungulira yokhazikika ndikuyiyika paziro pa lalikulu lalikulu. Kenako, mofananamo, ikani choyezera cholumikizira mbali imodzi ya mowongoka. Kuwerenga kwa dial gauge ndiye cholakwika cha perpendicularity cha mbali imeneyo. Mofananamo, yesani cholakwika cha perpendicularity kumbali inayo, ndikutenga cholakwika chachikulu.

2. Contact Point Area Ratio of Parallel Straightedge: Ikani mawonekedwe owonetsera kumalo ogwirira ntchito a straightedge kuti ayesedwe. Pogaya pamwamba pa chitsulo chonyezimira kapena chowongoka cholondola chimodzimodzi kuti muwonetse malo olumikizirana nawo pamalo ogwirira ntchito. Kenako, ikani pepala lowoneka bwino (monga pepala la plexiglass) lokhala ndi mabwalo ang'onoang'ono 200 a 2.5mm x 2.5mm, kuyeza 50mm x 25mm, pamalo aliwonse pamalo ogwirira ntchito kuti ayesedwe. Yang'anani kuchuluka kwa dera lililonse lomwe lili ndi malo olumikizirana (m'magawo a 1/10). Werengani kuchuluka kwa magawo omwe ali pamwambapa ndikugawa ndi 2 kuti mupeze chiŵerengero cha malo okhudzana ndi malo oyesedwa.

Chachitatu, thandizani wolamulira wofanana ndi mipiringidzo yofanana kutalika kwa zizindikiro 2L/9 kuchokera kumapeto kwa wolamulira. Sankhani mlatho woyezera woyenera kutengera kutalika kwa malo ogwirira ntchito a wolamulira (nthawi zambiri masitepe 8 mpaka 10, okhala pakati pa 50 ndi 500mm). Kenako, ikani mlatho kumapeto kwa wolamulira ndikuteteza chowunikira kapena mulingo wake. Sunthani mlatho pang'onopang'ono kuchokera kumalekezero a wolamulira kupita ku mzake, kusuntha mtunda uliwonse kuchokera ku autocollimator ndi maphunziro a 1 "(kapena 0.005mm / m) kapena mulingo wamagetsi ndi omaliza maphunziro a 0.001mm/m (kwa kutalika kogwira ntchito kuposa 500mm, wolamulira wa Class 1 wokhala ndi maphunziro a 0mm / 0. coincident mlingo (chimango-mtundu mlingo ndi maphunziro a 0.02mm/m angagwiritsidwe ntchito pa mlingo 2) Kusiyana pakati pa pazipita ndi osachepera kuwerenga kulakwa kwa mlingo ntchito pamwamba, cholakwika chowongoka chikhoza kutsimikiziridwa pogwiritsa ntchito 50mm kapena 100mm mbale ya mlatho.

IV. Kufanana kwa malo apamwamba ndi otsika ogwirira ntchito, ndi malo ogwirira ntchito ndi malo otsika othandizira, a msinkhu wofanana. Ngati mbale yoyenera ya lathyathyathya palibe, mbali ya mlingowo ikhoza kuikidwa pamtunda wothandizira ndi kusiyana kwa msinkhu wa msinkhu woyezera pogwiritsa ntchito lever micrometer ndi maphunziro a 0.002mm kapena micrometer ndi maphunziro a 0.002mm.