Thermal Aspects of Grinding with CBN Wheels

Lavine, Adrienne S.; Malkin, S.; Jen, Tien‐Chien

doi:10.1016/s0007-8506(07)62768-1

Cited by 96 publications

(38 citation statements)

References 2 publications

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“…Lavine, Malkin and Jen analysed the heat transfer into grains of the grinding wheel assuming the grains to be conical in shape using one-dimensional simplifications to represent two-dimensional heat conduction [79]. Later Rowe and Black [80] showed that the simplified cone assumption was inaccurate and particularly so for the large negative rake angles applicable in grinding.…”

Section: Grinding Temperaturementioning

confidence: 99%

Assessment of vitrified CBN wheels for precision grinding

Cai

Rowe

2004

International Journal of Machine Tools and Manufacture

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The aim of the investigation was to achieve a method of assessment of vitrified CBN wheels for precision grinding based on investigation of relationships between the changing features of grinding wheels and grinding performance.Feasible measurement and observation techniques for the changing topographical features of vitrified CBN wheels in grinding were investigated. Comparisons included measurement resolution, measuring depth, ease of application, and data analysis and interpretation. The optical interferometer was found to be good for measurement of vitrified CBN wheel topography, and a microscope was found to be helpful for understanding the measurement results. In addition, replication techniques were compared and analyzed. A newly developed replica material with high resolution (0.1 microns) and easy operation, Microset 101, was employed as a negative replica material in the experimental work.A set of parameters was defined which describe the wheel characteristics including active cutting edge density, cutting edge dullness, effective porosity volume ratio and wheel scratch hardness. A parametric study was made of the effects of wheel characteristics on CBN grinding performance including grinding force, grinding temperature, wheel life and workpiece accuracy using elevated wheel speed with different workpiece materials.An experimental study was carried out with grinding wheels having different grain sizes, pore volumes, and wheel hardness values for grinding different workpiece materials. Experimental results are discussed in relation to the theoretical understanding of the process. The effects of varying wheel structure, wheel speed and workpiece material are discussed in relation to grinding power, workpiece surface roughness, size error and wheel topography. IThe mechanics of grinding wheel wear and loading are reviewed. Grinding wheel wear and loading trends were predicted. Suggestions are made for the avoidance of grinding wheel wear and loading. II

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Section: Grinding Temperaturementioning

confidence: 99%

Assessment of vitrified CBN wheels for precision grinding

Cai

Rowe

2004

International Journal of Machine Tools and Manufacture

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“…Consequently, more heat is conducted out of the grinding zone lowering the grinding temperatures (Lavine et al, 1989). Thus, the thermal damage is reduced when CBN are used (Malkin, 1985), the burn rarely occurs and the residual stresses are mainly compressive (Tönshoff & Grabner, 1984).…”

Section: Residual Stresses In Grindingmentioning

confidence: 99%

Evaluation of the thermal damages in inlet engine valves varying the grinding wheels and the cutting fluids

Bianchi

Silva²,

Aguiar

et al. 2003

Rem: Rev. Esc. Minas

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ResumoNesse artigo é apresentada uma pesquisa experimental sobre os danos térmicos que aparecem nas válvulas de admissão dos motores após passarem pelo processo de retificação. Foram utilizados, nessa experimentação, quatro tipos de fluidos de corte e dois rebolos (CBN e Al 2 O 3 ), sendo analisadas a tensão residual, a microdureza e a microestrutrura das peças fabricadas com esses materiais. Esses fluidos e rebolos resultaram em diferentes tipos de tensões residuais. O óleo de corte, por exemplo, induziu nas peças tensões residuais de compressão. Em relação ao rebolo de CBN, devido às melhores propriedades de seus grãos abrasivos, estes proporcionaram tensões de compressão para todos os fluidos testados. Em relação às alterações microestruturais, notou-se que nenhuma alteração térmica foi detectada nas peças, embora a inexistência de alterações microestruturais nem sempre sugerem que tensões residuais favoráveis foram obtidas. Palavras

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“…51]. Figure 2 shows the usual heat flux profiles ( ) considered in the literature: constant [4,5], linear [6][7][8], triangular [9,10], and parabolic [11,12]. We can rewrite (5) in dimensionless form, setting the following dimensionless quantities: T = 0 ( − ∞ )/( ), = / , = / , and = ℓ/ (Peclet number), where…”

Section: Introductionmentioning

confidence: 99%

Efficient Series Expansions of the Temperature Field in Dry Surface Grinding for Usual Heat Flux Profiles

González-Santander

2017

Mathematical Problems in Engineering

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In the framework of Jaeger's model for heat transfer in dry surface grinding, series expansions for calculating the temperature field, assuming constant, linear, triangular, and parabolic heat flux profiles entering into the workpiece, are derived. The numerical evaluation of these series is considerably faster than the numerical integration of Jaeger's formula and as accurate as the latter. Also, considering a constant heat flux profile, a numerical procedure is proposed for the computation of the maximum temperature as a function of the Peclet number and the depth below the surface. This numerical procedure has been used to evaluate the accuracy of Takazawa's approximation.

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Thermal Aspects of Grinding with CBN Wheels

Cited by 96 publications

References 2 publications

Assessment of vitrified CBN wheels for precision grinding

Assessment of vitrified CBN wheels for precision grinding

Evaluation of the thermal damages in inlet engine valves varying the grinding wheels and the cutting fluids

Efficient Series Expansions of the Temperature Field in Dry Surface Grinding for Usual Heat Flux Profiles

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