Observations on the mean values of forces, torque and specific power in the peripheral milling process

Yellowley, I.

doi:10.1016/0020-7357(85)90034-4

Cited by 65 publications

(23 citation statements)

References 4 publications

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“…El modelado de los proceso de corte tiene por objetivo ajustar las condiciones de corte apropiadas (Durán y Bavestrello, 2006), evaluar el desgaste de la herramienta (Rehorn et al, 2005) y el consumo energético (Sarache et al, 2007) entre otros. Los métodos de modelado utilizados por diversos autores son los basados en herramientas numéricas, como los elementos finitos y mediante el desarrollo de diversos modelos mecanicistas (Yellowley, 1985, López de Lacalle et al, 2009). …”

Section: Introductionunclassified

“…En la ecuación (1) y ecuación (2), el factor (c/D), representa la influencia del bisel transversal en el cálculo de la fuerza de avance Ff y del par de taladrado Mc. Por otra parte, los modelos basados en la presión específica de corte orientados a predecir la fuerza de avance Ff y la fuerza de corte Fc, han sido ampliamente utilizados tanto para proceso de taladrado como para fresado (Yellowley, 1985;Lazar y Xirouchakis, 2013;Rey et al, 2016). La formulación del método está secuencialmente expresado en las ecuaciones (3) y (4).…”

Section: Introductionunclassified

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Modelo de Shaw y Oxford aplicado a un Proceso de Taladrado que Utiliza Brocas Helicoidales con Geometría Innovada y Ausencia de Bisel

Leal-Muñoz

Guzmán

2017

Inf. tecnol.

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ResumenEn este artículo se presenta una forma corregida del modelo de Shaw y Oxford para brocas con geometría mejorada y ausencia de bisel transversal. Se ha realizado un ajuste de las expresiones que conforman el modelo y se han determinado los parámetros experimentales para estimar la fuerza de avance y el par de taladrado en aluminio Al-2011. Los resultados obtenidos mediante el modelo corregido se han comparado con valores estimados mediante el modelo de la presión específica de corte. Finalmente, se muestra que el modelo de Shaw y Oxford puede ser aplicado en brocas con geometría mejorada mediante el ajuste del parámetro asociado al bisel transversal. Palabras clave: presión específica de corte; mecanizado; fuerza de corte; taladrado; Shaw y Oxford The Shaw and Oxford Model Applied to a Process of Drilling that uses Twist Drills with Innovated Geometry and without Chisel AbstractThis article presents a corrected form of the Shaw and Oxford model for drills with improved geometry and absence of the edge chisel. Adjustments of the expressions that compose the model have been made, and also the experimental parameters have been determined in order to estimate the thrust force and the torque of the drilling in aluminum Al-2011. The results obtained through the corrected model, have been compared with estimated values through the specific cutting pressure model. Finally, it is proved that the Shaw and Oxford model can be applied to drills with improved geometry through the adjustment of the parameter associated to the edge chisel.

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Section: Introductionunclassified

Modelo de Shaw y Oxford aplicado a un Proceso de Taladrado que Utiliza Brocas Helicoidales con Geometría Innovada y Ausencia de Bisel

Leal-Muñoz

Guzmán

2017

Inf. tecnol.

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“…The cutting forces in the x, y and z axes, which were measured indirectly from the current of the feed-drive servo motors, were used for cutting force regulation and tool monitoring in slow face milling [9][10][11][12]. The monitoring of spindle load or current is a well-established approach to tool condition monitoring using adaptive control [11][12][13][14]. Spindle current monitoring was utilized to develop an adaptive control for machine tools when workpiece geometry is unknown [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The monitoring of spindle load or current is a well-established approach to tool condition monitoring using adaptive control [11][12][13][14]. Spindle current monitoring was utilized to develop an adaptive control for machine tools when workpiece geometry is unknown [13][14][15]. A time series autoregressive model proposed a method for monitoring tool breakage [16].…”

Section: Introductionmentioning

confidence: 99%

Integration of Pre-Simulation and Sensorless Monitoring for Smart Mould Machining

Kim¹

2016

Int. j. simul. model.

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A smart mould machining system, which detects machining status and controls the CNC through presimulation and real-time data, was developed. Pre-simulation predicts cutting forces, and inserts the best feed rate and virtual load on each line of the NC data. The active feed rate reduced machining by up to 36 %, without increasing the maximum cutting forces. The actual cutting load was computed from spindle load data and a friction load compensation algorithm. Collision and tool wear were detected by comparing the actual and virtual load, with the time synchronised by using tool position data. The system machined an automotive grill mould cavity for 34 hours without the supervision of a worker, because pre-simulation had stabilized the milling process and monitoring would have stopped the process if the actual load was different to the virtual load. Pre-simulation has been verified by thousands of mould makers and integrated with sensorless monitoring in an open CNC.

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“…In contrast, the dual-mechanism force model explicitly and separately considers the effects of the ploughing and shearing mechanisms in the cutting process. Yellowley [7] first proposed the separate use of a cutting force for the chip shearing and a parasitic force for the edge ploughing effect in the milling force model. Both the shearing and ploughing cutting coefficients were assumed to be constant and independent of the chip thickness.…”

Section: Introductionmentioning

confidence: 99%

Fourier Analysis of Milling Force for General Helical Cutters via Spacetime Convolution, Part 1: Model Development

Cm¹,

Jj²

2015

J Appl Mech Eng

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A space-time convolution approach to analyze the milling force for a general helical cutter is proposed. The single flute cutting force is firstly established through an integrated space-time convolution process. Subsequently, multi-flute milling forces are obtained through convolution integration in time domain (i.e., angular domain). In this convolution force model, convolution theorem does not apply directly and a modified convolution theorem is presented to find the Fourier coefficients of the total milling force for any analytically definable helical cutter. From the Fourier analysis, the magnitudes of higher order Fourier coefficients are shown to drop off quickly. Therefore, the capability to extract a small number of Fourier coefficients as characteristic values of milling forces is an important advantage of this convolution force model. Furthermore, this model provides a convenient means to calculate the Fourier coefficients of the milling forces if the profile of cutter/workpiece can not be analytically definable and only the discrete values of cutter/workpiece profile data are given from scanning. Also, the general effects of cutter geometry and cutting parameters on the spectra characteristics of the milling forces are extracted and discussed. Based on the spectra characteristics, the strategy of selecting cutters for rough and finish machining in slot milling is presented.

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Observations on the mean values of forces, torque and specific power in the peripheral milling process

Cited by 65 publications

References 4 publications

Modelo de Shaw y Oxford aplicado a un Proceso de Taladrado que Utiliza Brocas Helicoidales con Geometría Innovada y Ausencia de Bisel

Modelo de Shaw y Oxford aplicado a un Proceso de Taladrado que Utiliza Brocas Helicoidales con Geometría Innovada y Ausencia de Bisel

Integration of Pre-Simulation and Sensorless Monitoring for Smart Mould Machining

Fourier Analysis of Milling Force for General Helical Cutters via Spacetime Convolution, Part 1: Model Development

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