Abstract
Purpose of research. Improving surfaces' forming by a blade tool is an up-to-date task. Labour intensity of turning processing is a dominant part of all working. Vibrations during turning work are the result of premature tool wear and increased surface roughness of the parts. New cutter designs are of practical and scientific interest. They can reduce vibrations occurring during cutting, increase their persistence and improve processing quality. The aim and objectives of this proposed structural line of damping cutters with adjustable (controlled) rigidity are improvement of cutting tool structures, which allow to increase its resistance due to vibration damping; creation of efficient technological processes of cutting materials, which improve quality of treatment; improved operational characteristics of cutters.Methods. Existing structures of vibration damping cutters with elastic damping pieces of constant rigidity, in which holder or mandrel with cutting plate is installed, do not have necessary requirements for efficiency of vibration reduction due to impossibility of tool stiffness variation. Besides, there is high labour intensity of cutters preparation for operation and dismantling. Innovative cutter designs with adjustable (controlled) rigidity are presented.Results. The developed line of vibration-quenching cutters with rigidity variation and taking into account disadvantages of existing structures makes it possible to control vibration frequencies of perturbating force and components of a tool system which excludes uncontrolled growth of vibration amplitude and significantly prolongs efficiency of cutters with high quality of processing. It depends on processed material and cutting process modes. Existing and new designs of damping cutters make it possible to classify them. So it is possible to carry out research on their improvement.Conclusion. Proposed damping cutters with varying rigidity meet goals and objectives. According to theoretical research and industrial tests, simplicity of structures and technologies of new damping cutters manufacturing it is possible to implement them into production.
Highlights
Существенным недостатком большинства имеющихся конструкций резцов является то, что они жестко связаны со станком
Это не позволяет достичь эффективного снижения вибраций в процессе обработки
Демпфирующий резец с возможностью управления его жесткостью
Summary
Существенным недостатком большинства имеющихся конструкций резцов является то, что они жестко связаны со станком. Новые конструкции резцов для снижения вибраций, возникающих в процессе резания, увеличения их стойкости и повышения качества обработки представляют практический и научный интерес. Целью и задачами предлагаемой конструкционной линейки демпфирующих резцов с регулируемой (управляемой) жесткостью являются: наименьшей интенсивности износа, со- Вибрации в процессе токарной обработки являются следствием преждережущего инструмента, позволяющих увеличить его стойкость за счет гашения вибраций; – уменьшить уровень вибрации при Результаты и их обсуждение обработке путем минимизации действующих на державку сил резания подбором жесткости вставки из демпфирующего материала, что увеличивает стойкость резцов;
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