Шлифование обеспечивает 5-й —7-й квалитеты точности и шероховатость поверхности Ra 0,63...0,32 мкм.
Шлифовальную операцию выполняют на внутришлифовальном или бесцентровошлифовальном станке.
При выполнении внутришлифовальной операции (рис. 5.9, а) деталь 2, закрепленная в патроне или в специальном приспособлении 1, вращается, а шлифовальный круг 3 кроме вращательного совершает возвратно-посту- пательное продольное и поперечное движения, удаляя за каждый рабочий ход тонкий слой металла.
Направления вращательных движений круга и обрабатываемой детали должны быть противоположными. Для повышения точности обработки несколько последних ходов шлифовального круга совершаются без поперечной подачи. Диаметр шлифовального круга обычно составляет 0,8— 0,9 диаметра обрабатываемого отверстия.
При шлифовании скорость вращения шлифовального круга 25 — 35 м/с, скорость вращения детали 0,015 — 0,030 скорости круга. Продольная подача при чистовом шлифовании 0,20 —
Планетарное шлифование используется для обработки отверстий больших диаметров. При выполнении операции (рис. 5.9, б) деталь 2 неподвижно крепится на столе станка, а шлифовальный круг 3, помимо вращательного движения вокруг своей оси, выполняет вращение вокруг оси отверстия и совершает возвратно-поступательное и поперечное движения, осуществляя продольную и поперечную подачи.
При бесцентрово-шлифовальной операции (рис. 5.9, в) деталь с предварительно обработанной наружной поверхностью располагается между тремя роликами 1, один из которых (большего диаметра) является ведущим, а два других — опорными. Шлифовальный круг 3 располагается в отверстии консольно и совершает возвратно-поступательное движение вдоль оси отверстия. Этот вид шлифования можно использовать при обработке деталей со сквозными, глухими, цилиндрическими и коническими отверстиями.
Хонингование применяется для отделочной обработки отверстий после развертывания, шлифования или растачивания с целью получения более высокой точности размеров и малой шероховатости поверхности.
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password_clear ⇒
groups ⇒
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Application 0.029 seconds (+0.001); 4.04 MB (+0.112) - beforeRenderModule mod_virtuemart_cart (Корзина)
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1 × INSERT INTO `automarket_session` (`session_id`, `client_id`, `time`)
VALUES ('sll3l809gc0j5eapnco28p42n7', 0, '1734800763'
1 × UPDATE automarket_sefurls
SET cpt=(cpt+1)
1 × DELETE
FROM `automarket_session`