Evaluation of friction energy in the overall energy balance of machining
DOI:
https://doi.org/10.31498/2225-6733.32.2016.83922Keywords:
energy balance, friction energy, machining, cutting tool, cutting force, friction coefficient, the cutting temperatureAbstract
The analytical relations that make it possible to determine the components of the cutting forces arising during the turning on the front and rear surfaces of the cutter and take into account the friction and cutting processes have been defined. It has been shown that taking into account the friction of the rear surface of the cutting tool against the material being cut results in the existence of minimum of the radial component of the cutting force as a function of the friction coefficient. In this case the minimum of the radial component of the cutting force is shifted towards the lower values of the friction coefficient with decreasing intensity, and increasing the rake (including both positive and negative values), which is true for both cutting and abrasive treatment. On the basis of analytical relationships cutting and friction energy in the overall energy balance of machining have been evaluated and the conditions to reduce the friction energy have been defined. The reliability of the theoretical solutions has been confirmed experimentally. It has been stated that with the cutting speed increase in turning the tangential and radial components relation increases due to the decrease in the intensity of friction on the rear surface of the cutting tool. As this takes place the angle of action that is equal to the difference of the conventional angle of friction of the material being cut and the front surface of the cutting tool and the rake angle decreases. This shows that the friction coefficient decreases with the increase in cutting speeds due to increasing temperature and cutting power in the overall energy balance of the turning process. Practical recommendations to improve the efficiency of the machining by reducing frictional energy have been made. The technique of computational and experimental determination of the parameters of the power intensity of the cutting process has been offeredReferences
Грановский Г.И. Резание металлов: учебник / Г.И. Грановский, В.Г. Грановский. – М. : Высшая школа, 1985. – 304 с.
Бобров В.Ф. Основы теории резания металлов / В.Ф. Бобров. – М. : Машиностроение, 1975. – 343 с.
Филоненко С.Н. Резание металлов / С.Н. Филоненко. − К. : Вища школа, 1969. − 260 с.
Алмазная обработка : учебное пособие / А.В. Якимов, Ф.В. Новиков, Г.В. Новиков, А.А. Якимов. – К. : ІЗМН, 1996. – 168 с.
Физико-математическая теория процессов обработки материалов и технологии машиностроения / Под общ. ред. Ф.В. Новикова и А.В. Якимова. – Одесса : ОНПУ, 2002. – 580 с. – (Механика резания материалов : в 10-ти т.; Т. 1).
Новиков Ф.В. Определение сил резания, действующих на передней и задней поверх-ностях резца / Ф.B. Новиков, О.С. Кленов // Вісник НТУ «ХПІ» : Зб. наук. пр. Серія : Технології в машинобудуванні. – Харків : НТУ «ХПІ». − 2016. − № 5(1177). − С. 81-86.
Полетика М.Ф. Исследование процесса резания титановых сплавов / М.Ф. Полетика // Обрабатываемость жаропрочных и титановых сплавов. – Куйбышев : Куйбышевское областное книжное издательство, 1962. – С. 28-35.
Downloads
How to Cite
Issue
Section
License
The journal «Reporter of the Priazovskyi State Technical University. Section: Technical sciences» is published under the CC BY license (Attribution License).
This license allows for the distribution, editing, modification, and use of the work as a basis for derivative works, even for commercial purposes, provided that proper attribution is given. It is the most flexible of all available licenses and is recommended for maximum dissemination and use of non-restricted materials.
Authors who publish in this journal agree to the following terms:
1. Authors retain the copyright of their work and grant the journal the right of first publication under the terms of the Creative Commons Attribution License (CC BY). This license allows others to freely distribute the published work, provided that proper attribution is given to the original authors and the first publication of the work in this journal is acknowledged.
2. Authors are allowed to enter into separate, additional agreements for non-exclusive distribution of the work in the same form as published in this journal (e.g., depositing it in an institutional repository or including it in a monograph), provided that a reference to the first publication in this journal is maintained.
