Technological methods of improving the quality and productivity of processing car engine parts
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Дата
2023
Назва журналу
Номер ISSN
Назва тому
Видавець
Харківський національний автомобільно-дорожній університет
Анотація
Problem. The most high-precision parts of the car engine are camshaft and crankshaft, parts
that require two-sided processing of the end surfaces: piston pins, valve springs. Traditional
processing methods are used in their manufacture and repair. Therefore, taking into account the large
volumes of car production, the improvement of existing and development of new processing methods is
very important. Goal. The purpose of this work is the analysis and improvement of existing methods
and the implementation for new ones of processing the specified parts to increase the productivity and
accuracy of their processing. Methodology. The processing of support necks and cams is expedient to
be carried out in one installation during deep high-speed grinding with crossed axes of the circle and
camshaft due to stabilization of the cutting depth and feed along the contour with uneven rotation of
the part. The method of high-speed milling of camshaft cams with crossed axes of the tool and parts on
CNC machines is also promising. Root and connecting rod necks of crankshafts can be processed in
one installation by deep high-speed grinding with crossed axes of the circle and the part due to
stabilization of the depth of cutting and feed along the contour with uniform rotation of the part. For
end surfaces, it is possible to introduce single-pass processing on double-sided end grinding machines
with oriented grinding wheels with calibration areas. Results. The obtained results indicate a 25-30%
increase in productivity and processing accuracy of the specified parts. Originality. It is used when
processing the effect of the intersection of the axes of the tool and the part and carrying out a special
correction of the tool, which allows to obtain a calibration area. Practical value. The proposed
methods improve the parameters of accuracy, roughness and productivity of processing, which is an
important scientific and practical task, whose solution will allow to increase the service life of car
components and assemblies, reduce the cost of their production, and raise the level of competitiveness
of products and services.
Опис
Ключові слова
camshaft, crankshaft, piston pins, valve springs, high-speed milling, one-pass machining, розподільчий вал, колінчастий вал, поршневі пальці, клапанні пружини, високошвидкісне фрезерування, однопрохідна обробка
Бібліографічний опис
Technological methods of improving the quality and productivity of processing car engine parts / Kalchenko V., Venzheha V., Kuzhelnyi Ya., Klymenko V. // Автомобiльний транспорт : зб. наук. пр. / М-во освiти i науки України, Харків. нац. автомоб.-дор. ун-т ; редкол.: А. В. Гнатов (гол. ред.) та iн. – Харкiв, 2023. – Вип. 52. – С. 25–31.