После нарезания и термической обработки шлицев производят их шлифование на шлицешлифовальных станках с горизонтальной осью вращения круга и возвратно-поступательным ходом стола.
Шлифование шлицевых соединений в зависимости от способов центрирования может производиться по одной из схем, представленных на рис. 5.21. При центрировании шлицевых соединений по внутреннему диаметру производят шлифование боковых сторон и дна впадин шлиц. Шлифование может производиться за одну или две операции. За одну операцию шлифование может осуществляться тремя цилиндрическими (рис. 5.21, а), двумя профильными (рис. 5.21, 6} или одним фасонным кругом (рис. 5.21, в), форма которого соответствует форме впадины. Шлицы 172 можно также отшлифовать за две операции (рис. 5.21, г): на первой опера-
Методы и маршруты обработки типовых поверхностей деталей
ЦИИ шлифуют только боковые стороны шлицев двумя цилиндрическими кругами, а на второй — внутреннюю цилиндрическую поверхность впадины одним шлифовальным кругом. После каждого двойного хода стола обрабатываемая деталь автоматически с помощью специальных делительных устройств поворачивается вокруг своей оси. Таким образом, шлифовальный круг обрабатывает шлицы постепенно один за другим.
Базирование корпусных деталей. Выбор технологических баз является весьма ответственным этапом при разработке технологического процесса обработки корпусных деталей. Как правило, за опорно-установочные базы принимают такие поверхности детали, относительно которых задано и наиболее строго ориентировано положение большинства других поверхностей. Для достижения необходимой точности размерных связей поверхностей деталей следует использовать именно эти поверхности в качестве технологических баз, выдерживая принцип постоянства и совмещения баз. Как правило, данные поверхности являются конструкторскими базами.
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