Magawo aukadaulo a maziko a granite makina.

 

Granite, yomwe imagwiritsidwa ntchito kwambiri ndi miyala ya igneous, imadziwika chifukwa cha kulimba kwake komanso kulimba kwake, zomwe zimapangitsa kuti ikhale chinthu choyenera kugwiritsa ntchito maziko a makina m'mapulojekiti osiyanasiyana omanga. Kumvetsetsa magawo aukadaulo a maziko a makina a granite ndikofunikira kwambiri kwa mainjiniya ndi akatswiri omanga nyumba kuti atsimikizire kuti kapangidwe kake ndi kolimba komanso kuti kakhale nthawi yayitali.

Chimodzi mwa zinthu zazikulu zaukadaulo wa granite ndi mphamvu yake yokakamiza, yomwe nthawi zambiri imakhala pakati pa 100 ndi 300 MPa. Mphamvu yokakamiza kwambiri imeneyi imalola granite kupirira katundu wolemera, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsa ntchito makina ndi zida zolemera. Kuphatikiza apo, granite imakhala ndi ma porosity ochepa, nthawi zambiri pakati pa 0.1% ndi 0.5%, zomwe zimapangitsa kuti isalowe m'madzi komanso kuti isamawonongeke ndi mankhwala, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsa ntchito maziko a makina.

Chinthu china chofunikira ndi modulus ya elasticity, yomwe ya granite ndi pafupifupi 50 mpaka 70 GPa. Kapangidwe kameneka kamasonyeza kuchuluka kwa zinthu zomwe zidzasokonekera zikamapanikizika, zomwe zimatithandiza kudziwa momwe zimagwirira ntchito pansi pa mphamvu zamagetsi. Kuchuluka kwa kutentha kochepa kwa granite, pafupifupi 5 mpaka 7 x 10^-6 /°C, kumatsimikizira kuti imasunga kapangidwe kake ngakhale kutentha kusinthasintha, zomwe zimapangitsa kuti ikhale chisankho chodalirika cha maziko m'nyengo zosiyanasiyana.

Kuchuluka kwa granite, komwe nthawi zambiri kumakhala pakati pa 2.63 ndi 2.75 g/cm³, kumachitanso gawo lofunika kwambiri pakupanga maziko. Kuchuluka kwa granite kumathandiza kuti maziko akhale olimba, kuchepetsa chiopsezo chokhazikika kapena kusuntha pakapita nthawi. Kuphatikiza apo, kukana kwa granite ku kusweka ndi kusweka kumapangitsa kuti ikhale chisankho chabwino kwambiri pa maziko omwe ali ndi magalimoto ambiri kapena kupsinjika kwa makina.

Pomaliza, magawo aukadaulo a maziko a granite, kuphatikizapo mphamvu yokakamiza, kusinthasintha kwa kusinthasintha, kutsika kwa porosity, ndi kuchuluka kwamphamvu, zikuwonetsa kugwira ntchito kwake ngati maziko. Pogwiritsa ntchito zinthu izi, mainjiniya amatha kupanga maziko olimba komanso olimba omwe amakwaniritsa zofunikira za zomangamanga zamakono.