Plastic flow in rotary ultrasonic machining of ceramics

Pei, Zhijian; Ferreira, Placid M.; Haselkorn, M.

doi:10.1016/0924-0136(94)01720-l

Cited by 80 publications

(25 citation statements)

References 9 publications

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“…Although there have been some models [14][15][16][17][18][19] of RUM, most of them were developed for predicting material removal rate (MRR) or investigating material removal mechanism, and only one cutting force model for RUM of ductile materials was reported [20]. At present, no publications are available on cutting force models for RUM of brittle materials.…”

Section: Introductionmentioning

confidence: 99%

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A cutting force model for rotary ultrasonic machining of brittle materials

Liu

Cong

Pei

et al. 2012

International Journal of Machine Tools and Manufacture

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187

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Knowing cutting force in rotary ultrasonic machining (RUM) can help optimizing input variables. RUM of brittle materials has been investigated both experimentally and theoretically. However, there are no reports on cutting force models for RUM of brittle materials. This paper presents a mechanistic model for cutting force in RUM of brittle materials. Assuming that brittle fracture is the primary mechanism of material removal in RUM of brittle materials, the cutting force model is developed step by step. On the basis of this mechanistic model, relationships between cutting force and input variables (such as spindle speed, feed rate, ultrasonic vibration amplitude, abrasive size, and abrasive concentration) are predicted.

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Section: Introductionmentioning

confidence: 99%

“…Some researchers [14][15][16][17][18][19][20] took diamond abrasive particles as spheres (like blunt indenters).…”

Section: Approach To Model Developmentmentioning

confidence: 99%

A cutting force model for rotary ultrasonic machining of brittle materials

Liu

Cong

Pei

et al. 2012

International Journal of Machine Tools and Manufacture

Self Cite

187

View full text Add to dashboard Cite

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“…Pei et al [6,7] reported that there exist two material removal modes in RUM of ceramic materials: brittle fracture mode and ductile model. Models for predicting the MRR based upon the two material removal modes were developed by Prabhakar et al [8] and Pei et al [6,9].…”

Section: Introductionmentioning

confidence: 99%

Edge-chipping reduction in rotary ultrasonic machining of ceramics: Finite element analysis and experimental verification

Li¹,

Cai²,

Pei³

et al. 2006

International Journal of Machine Tools and Manufacture

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“…Por ejemplo, Prabhakar et al (34) desarrollaron un modelo teórico para calcular el MRR en el proceso RUM, fue el primer intento en caracterizar este parámetro. Desde entonces, los modelos se pueden agrupan en dos grupos: uno que se basa en un material frágil y el otro en un material dúctil (35,36). Entre ellos, hay modelos teóricos que tienen en cuenta el principio de rotura por indentación (34) mientras otros se basan en modelos mecanísticos (37).…”

Section: Introductionunclassified

Posibilidades del mecanizado por ultrasonidos rotatorio para fomentar el uso de las cerámicas técnicas en el mercado Español actual

Arriola¹,

Gonzalo²,

Bengoetxea³

2012

Bol. Soc. Esp. Ceram. Vidr.

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Las propiedades mecánicas de las cerámicas técnicas son adecuadas para aplicaciones en diferentes sectores como la medicina (prótesis,...), automóvil (rodamientos,….), aeroespacial (loseta,…), óptica (láser,…), etc. donde se requieren características como la gran resistencia al desgaste, alta dureza y estabilidad termoquímica. Sin embargo, la fabricación de estos materiales es difícil y costosa, en algunos casos alcanzando el 90% del coste final, por lo que su aplicación está limitada. Este trabajo presenta el mecanizado por ultrasonidos rotatorio (RUM) como un proceso no convencional que permite la fabricación de piezas cerámicas con geometrías 3D complejas de manera ecológica y económica. Este método consiste en la eliminación de material utilizando una herramienta superabrasiva dotada de 3 movimientos: rotación, vibración axial ultrasónica (20 KHz) y avance contra la pieza fija. Este proceso combina el rectificado convencional y el mecanizado por ultrasonidos logrando mayores volúmenes de material evacuado manteniendo las fuerzas de corte bajas. De esta manera, se superan las limitaciones de los métodos convencionales utilizados actualmente, obteniendo procesos más precisos, flexibles y económicos. En definitiva, el RUM es un proceso prometedor para las operaciones de mecanizado de cerámicas estructurales. Sus características permitirán fomentar el uso de las cerámicas en un mayor número de aplicaciones industriales. Palabras clave: Aplicaciones estructurales, mecanizado, ultrasonidos, cerámica Possibilities of rotary ultrasonic machining in order to give a boost to technical ceramics in the actual Spanish marketThe advanced properties of engineering ceramics are suitable to meet the requirements of several engineering applications such as medical (prosthesis…), automotive (bearing...), aerospace (tiles,...), optics (lasers,…) and so on, where high hardness, high wear resistance and thermo chemical stability are needed. However, the processing of these materials is difficult and costly, in some cases up to 90% of the price, which leads ceramics to limited applications. Rotary Ultrasonic Machining (RUM) is presented as a non conventional environmental-friendly and cost effective process that enables to obtain complex 3D shape ceramic products. A rotating tool with metal-bonded diamond abrasives is ultrasonically vibrated (typically 20KHz) and fed toward to the fixed workpiece at a constant pressure or a constant feed rate This process combines conventional grinding and ultrasonic machining, offering the possibility of increased material removal rates while keeping the machining forces low. Thus, the limitations of actually used conventional processes are overcome introducing more accurate, flexible and cost effective process capabilities. On balance, RUM is a promising process for primary machining operations on structural ceramic components. Its features will lead to enhance the use of ceramics in more industrial applications by increasing product development/design capabilities, high added value products and...

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Plastic flow in rotary ultrasonic machining of ceramics

Cited by 80 publications

References 9 publications

A cutting force model for rotary ultrasonic machining of brittle materials

A cutting force model for rotary ultrasonic machining of brittle materials

Edge-chipping reduction in rotary ultrasonic machining of ceramics: Finite element analysis and experimental verification

Posibilidades del mecanizado por ultrasonidos rotatorio para fomentar el uso de las cerámicas técnicas en el mercado Español actual

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