Головка-протяжка снабжена внутренними и наружными резцами с промежутком для поворота обрабатываемого зубчатого колеса на один зуб после прорезания каждой впадины без отвода инструмента в процессе работы. Радиус расположения боковых режущих кромок внутренних резцов, начиная с первого, равномерно уменьшается, а радиус наружных резцов, наоборот, равномерно увеличивается. Последние два резца головки-протяжки являются калибрующими и вступают в процесс обработки поочередно, после того, как предшествующий закончил процесс резания. На автомобильном производстве не обходится рабочий процесс без хорошего молота, молоты вы сможете найти тут на любой вкус.
Широкое распространение получила также обработка конических зубчатых колес с круговыми зубьями (как с переменной, так и постоянной высотой зуба) двухсторонним методом за одну операцию в целой заготовке на зуборезных станках с ЧПУ, характеризующихся высокой экономичностью и производительностью и обеспечивающих необходимое качество зубчатых зацеплений.
Достигаемая точность конических зубчатых колес с круговыми зубьями, нарезаемых резцовыми головками, соответствует 6-й, 7-й степени-точности при шероховатости боковых поверхностей зубьев Ra от 2,5 до 1,25 мкм методом обката, и Ra от 2,5 до 0,63 мкм — при методе копирования.
Для чистовой обработки оставляется припуск 0,5—
Время прорезания одной впадины составляет при чистовой обработке методом обката 15 —42 с.
Линия состоит из четырех зуборезных станков-автоматов, цепного конвейера, магазинов накопителей, перегружателей и манипуляторов, передающих обработанные зубчатые колеса с конвейера в зону обработки. Магазины-накопители, установленные между зуборезными автоматами, позволяют бесперебойно осуществлять технологический процесс при замене резцовых головок. Полная обработка зубьев конического зубчатого колеса 1 резцовой головкой 2 на автоматической линии выполняется за пять операций — черновая, получистовая, снятие фасок с опорных кромок зубьев, две чистовые. Каждая сторона обрабатываемой впадины — вогнутая или выпуклая — обрабатывается на отдельном зуборезном станке-автомате односторонней резцовой головкой.
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