Parmakuni

Parmakuni, 1) d a r   korkardi metall — prosessi bo parma surokh kardani masolehi metallist. Masolehro dar dasttokhhoi parmakuni, kharroti, agregati va gayra, inchunin bo yorii moshinhoi parmakunii dasti parma mekunand. Bo parma surokhhoe hosil mekunand, ki darajoti haqiqiashon 4—5 ast. Surokhhoi darajoti daqiqiashon az in balandro bo korkardi minbadai onho hosil mekunand. Dar vaqti Parmakuni du namudi harakat: harakati a s osi(charkhzani) va h a r a k a t i d i kh i sh (peshravi) ba amal meoyad.

Dar mavridi dar dastgohi parmakuni surokh karda shudani masoleh har du namu­di kharakatro parma ba jo meorad, dar dasttohoi digar boshad, masolehi korkardashavanda charkh mezanadu parma pesh meravad. Hangomi Parmakuni rejimi burish az rui surati burish v (surati davragii nuqtai az mehvari parma durtarini tegi burandai on, metr/daqiqa) va buzurgii d i h i sh s (kuchishi tirii parma dar dar yak davrzani millimetr/gard) muay­yan karda meshavad.

Hosilnokii Parmakuniiro vaqti  a s os i i tekhnologi T₀= L/n–s daqiqa (L — kuchishi parma dar samti dihish, millimetr; p—basomadi charkhzanii parma, gard/daqiqa) muayyan mekunad, 2) dar korkardi chub — prosessi bo parma surokh kar­dani chub va masolehi chubist, inchunin korkardi komaho, chuqurchai dandonaho va gayra. Darajoti daqiqi dar in vaqt az rui diametr ba 2—3, az rui umqi surokh ba 3—4 merasad. Basomadi charkhzanii parma hangomi surokh kardani chub 3000—12000 gard/daqiqa, buzurgii dihish az 0,1— 0,5 millimetr /gard (baroi chubhoi sakht) to 0,7—2,2 millimetr /gard (baroi chubhoi narm) meboshad.