scholarly journals Investigation of Influence of Grinding-machine Spindle Unit Rigidity on the Character of Abrasive Tool Wear

2017 ◽  
Vol 206 ◽  
pp. 972-978 ◽  
Author(s):  
T.N. Ivanova ◽  
V.B. Dementyev
Keyword(s):  
Tool Wear ◽  
Abrasive Tool ◽  
Spindle Unit ◽  
Machine Spindle ◽  
Grinding Machine

scholarly journals Methodology of evaluation of abrasive tool wear with the use of laser scanning microscopy

Scanning ◽  
2013 ◽  
Vol 36 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Dariusz Lipiński ◽  
Wojciech Kacalak ◽  
Robert Tomkowski
Keyword(s):  
Tool Wear ◽  
Laser Scanning ◽  
Laser Scanning Microscopy ◽  
Scanning Microscopy ◽  
Abrasive Tool

Simplified Dynamic Analysis of Grinders Spindle Node

2014 ◽  
Vol 11 (1) ◽  
pp. 11-15
Author(s):  
Peter Demec
Keyword(s):  
Dynamic Analysis ◽  
Rapid Assessment ◽  
Teaching Material ◽  
Mathematical Apparatus ◽  
Modern Information Technology ◽  
Entire Structure ◽  
E Learning ◽  
Machine Spindle ◽  
Modern Information ◽  
Grinding Machine

Abstract The contribution deals with the simplified dynamic analysis of surface grinding machine spindle node. Dynamic analysis is based on the use of the transfer matrix method, which is essentially a matrix form of method of initial parameters. The advantage of the described method, despite the seemingly complex mathematical apparatus, is primarily, that it does not require for solve the problem of costly commercial software using finite element method. All calculations can be made for example in MS Excel, which is advantageous especially in the initial stages of constructing of spindle node for the rapid assessment of the suitability its design. After detailing the entire structure of spindle node is then also necessary to perform the refined dynamic analysis in the environment of FEM, which it requires the necessary skills and experience and it is therefore economically difficult. This work was developed within grant project KEGA No. 023TUKE-4/2012 Creation of a comprehensive educational - teaching material for the article Production technique using a combination of traditional and modern information technology and e-learning.

STABILIZATION OF QUALITY AND PRODUCTIVITY OF GRINDING OF EXTENDED CYLINDRICAL SURFACES OF SHAFTS WITH PETAL CIRCLES

2021 ◽  
pp. 127-131
Author(s):  
С.Г. Бишутин ◽  
И.Л. Шупиков
Keyword(s):  
Grain Size ◽  
Tool Wear ◽  
Material Removal ◽  
Metal Removal ◽  
Roughness Parameter ◽  
Abrasive Tool ◽  
Roughness Parameters ◽  
Grinding Wheels ◽  
Main Factors ◽  
Over Time

Статья посвящена проблеме стабилизации показателей лепесткового шлифования протяженных цилиндрических заготовок для исключения влияния изнашивания инструмента на качество и производительность данной обработки. Представлены результаты исследований влияния изнашивания абразивного инструмента на процессы съема металла и формирования шероховатости обрабатываемой поверхности при лепестковом шлифовании. Более интенсивно изнашиваются круги большей зернистости, причем стойкость инструментов зернистостью 12…20 (ГОСТ 3647- 80 (в ред. 1995 г.)) в 2…3 раза выше кругов зернистостью 40…50 и составляет 5...10 минут. Приведены данные по стойкости лепестковых шлифовальных кругов с учетом основных факторов процесса обработки. Установлено, что скорость съема металла при шлифовании неизношенными лепестковыми кругами зернистостью от 12 до 40 составляет 130...270 мм/мин, параметр шероховатости Ra находится в пределах от 0,4 до 3,0 мкм, Sm - от 0,08 до 0,20 мм. Значения параметров шероховатости обрабатываемой поверхности вследствие изнашивания инструмента возрастают до 2-3 раз, а скорость съема материала с течением времени непрерывно уменьшается и может стать равной нулю. Предлагается стабилизировать показатели лепесткового шлифования путем непрерывного или периодического увеличения деформации (натяга) инструмента в процессе абразивной обработки, что позволит поддерживать на необходимом уровне требуемое число режущих зерен The article is devoted to the problem of stabilization of indices of petal grinding of extended cylindrical billets in order to exclude the effect of tool wear on the quality and productivity of this treatment. We present the results of studies of influence of abrasive tool wear on processes of metal removal and formation of roughness of treated surface during petal grinding. Circles of greater grain wear more intensively, and the resistance of instruments with grain 12... 20 (GOST 3647- 80 (ed. 1995)) is 2...3 times higher than circles with grain 40...50 and is 5...10 minutes. We give the data on resistance of blade grinding wheels taking into account the main factors of the processing process. We found that the rate of metal removal when grinding with unworn petal circles with grain size from 12 to 40 is 130...270 mm/min, the roughness parameter Ra can vary in the range from 0.4 to 3.0 μm, Sm - from 0.08 to 0.20 mm. The values of the roughness parameters of the treated surface due to wear of the tool increase by 2-3 times, and the rate of material removal over time continuously decreases and can become zero. We proposed to stabilize the indicators of petal grinding by continuous or periodic increase of deformation of the tool during abrasive processing, which will allow one to maintain the required number of cutting grains at the required level

scholarly journals PCBN Performance in High Speed Finishing Turning of Inconel 718

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 582 ◽  
Author(s):  
José Díaz-Álvarez ◽  
Víctor Criado ◽  
Henar Miguélez ◽  
José Cantero
Keyword(s):  
Tool Wear ◽  
Inconel 718 ◽  
High Speed ◽  
Cubic Boron Nitride ◽  
Hard Metal ◽  
Abrasive Tool ◽  
Polycrystalline Cubic Boron Nitride ◽  
Metal Tools ◽  
Pcbn Tools ◽  
Cutting Speeds

Inconel 718 is a Ni superalloy widely used in high responsibility components requiring excellent mechanical properties at high temperature and elevated corrosion resistance. Inconel 718 is a difficult to cut material due to the elevated temperature generated during cutting, its low thermal conductivity, and the strong abrasive tool wear during cutting process. Finishing operations should ensure surface integrity of the component commonly requiring the use of hard metal tools with sharp tool edges and moderate cutting speeds. Polycrystalline cubic boron nitride (PCBN) tools recently developed an enhanced toughness suitable for these final operations. This paper focuses on the study of PCBN tools performance in finishing turning of Inconel 718. Several inserts representative of different manufacturers were tested and compared to a reference carbide tool. The evolution of tool wear, surface roughness, and cutting forces was analyzed and discussed. PCBN tools demonstrated their suitability for finishing operations, presenting reasonable removal rates and surface quality.

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