Mapaipi achitsulo oziziraKutalikitsa ndi kuchepetsa dera

Cold kukopa ndi ndondomeko zakuthupi, kwa zitsulo zakuthupi, ponena za kujambula kuti akwaniritse mawonekedwe enaake ndi zinthu zina zamakina, zinthuzo zimakhala pansi pa kutentha kwa chipinda chojambula.Zogulitsa zozizira zoyerekeza ndi thermoforming: kulondola kwapamwamba kwambiri komanso zabwino zomaliza zapamtunda.

Kujambula lalikulu m'mimba mwake zitsulo chitoliro Elongation (σ), pakuyesa kolimba, Kutalika kwachitsanzo pambuyo pa chithunzithunzi chinawonjezeka ngati peresenti ya kutalika kwa geji yoyambirira yotchedwa elongation.Ndiσ zowonetsedwa m'mayunitsi a%.Njirayi ndi: kumene : L1 - chitsanzo chosweka kutalika kwa geji, mm;L0 - kutalika kwachitsanzo choyambirira, mm.

Kujambula gawo lalikulu la chitoliro chochepa (ψ) mu kuyesa kolimba, chitsanzo chachikulu kwambiri chochepetsera kuchuluka kwa gawo lapachiyambi lopatsirana la gawo lake lodutsa pamphepete mwa khosi, lomwe limadziwika kuti shrinkage.Kuψ zowonetsedwa m'mayunitsi a%.Kuwerengeredwa motere: komwe: S0 - gawo loyambirira lachitsanzo, mm2;S1 - chitsanzo chothyoka khosi osachepera gawo lodutsa, mm2.

Chitsanzo choyesera chokhazikika m'khosi mwa njira yosinthira pulasitiki.Ndiye elongation wa chitsanzo anasonyeza wokhazikika mtanda gawo mbali mbali pa khosi gawo la chitsanzo akupitiriza kukula, mpaka chitsanzo chonse kukhala chikhalidwe khosi.Kutsika kwakukulu kwa khosi kunachitika mu gawo la zopatsa mphamvu.Pamene kujambula kutentha zitsulo pa mfundo zojambula m'munsimu recrystallization kutentha kwa kujambula, mu kujambula pamwamba recrystallization kutentha ndi otentha kujambula pa kutentha kuposa kutentha m'munsimu kutentha recrystallization kukoka kukoka.Kujambula waya wachitsulo, kupanga waya wojambula njira yodziwika kwambiri.Matenthedwe amakoka waya kuti azitenthedwa asanalowe m'mphepete mwa kufa, chitsulo chokanirira chimagwiritsidwa ntchito kwambiri pojambula, monga tungsten, molybdenum ndi waya wina wachitsulo.Pamene kutentha kukoka waya ayenera kokha kukokedwa mu dzenje kufa ndi chotenthetsera kwa enieni kutentha osiyanasiyana, makamaka kwa zinki waya, waya ndi zovuta mapindikidwe monga mkulu liwiro zitsulo, kubala zitsulo zojambula.