Comminution of material particles by water jets — Influence of the inner shape of the mixing chamber

Hlaváč, Libor M.; Hlaváčová, Irena M.; Jandačka, Petr; Zegzulka, Jiří; Viliamsová, Jana; Vašek, Jaroslav; Mádr, Vilém

doi:10.1016/j.minpro.2010.03.003

Cited by 29 publications

(23 citation statements)

References 4 publications

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“…The most commonly used pressure in the system, called AWJ, ranges from 400 to 600 MPa and common abrasive is garnet [2,11]. Its popularity in the processing stream as an abrasive garnet is caused by achieving high performance at relatively low wear focusing tube [3].…”

Section: Introductionmentioning

confidence: 99%

Disintegration and recycling possibility of selected abrasives for water jet cutting

Perec

2017

DYNA

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This paper presented a study of abrasive disintegration in a 400 MPa Abrasive Water Jet (AWJ). Abrasive particle size and distribution play a major role in machining and cutting efficiency of abrasive water jets. Tested garnet abrasive, commonly used in the abrasive water jet treatment, and corundum. It is of scientific interest to observe the disintegration of these particles which have been interactive with uncommonly used abrasive materials. Time impact of abrasive grains on the workpiece is very short and not all the grain in the stream of being able to do the work of cutting, you should expect the possibility of recovering the abrasive treatment. Considerable importance is the increase in cutting capacity crushed grains due to reveal new cutting edges. Based on a feasibility study this paper will present some results on achieved cutting data and shows also wear of the used focusing tube -the main part responsible for the formation of the jet.Keywords: Abrasive; water jet; grain size; recycling.Valoración de la desintegración y reciclaje de los componentes abrasivos en procesos de cortes con agua ResumenEste trabajo presentó un estudio de la desintegración abrasiva en un chorro de agua abrasivo de 400 MPa (AWJ). El tamaño y la distribución de partículas abrasivas juegan un papel importante en el mecanizado y la eficacia de corte de los chorros de agua abrasiva. Abrasivo de granate probado, comúnmente utilizado en el tratamiento con chorro de agua abrasivo y corindón. Es de interés científico observar la desintegración de estas partículas que han sido interactivas con materiales abrasivos poco comunes. El impacto del tiempo de los granos abrasivos en la pieza de trabajo es muy corto y no todo el grano en la corriente de poder hacer el trabajo de corte, debe esperar la posibilidad de recuperar el tratamiento abrasivo. Considerable importancia es el aumento en la capacidad de corte de granos triturados debido a revelar nuevos bordes de corte. Con base en un estudio de factibilidad, este documento presentará algunos resultados sobre los datos de corte obtenidos y muestra también el desgaste del tubo de enfoque utilizado, la principal parte responsable de la formación del chorro.Palabras clave: Abrasivo; chorro de agua; tamaño de grano; reciclaje.

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Section: Introductionmentioning

confidence: 99%

Disintegration and recycling possibility of selected abrasives for water jet cutting

Perec

2017

DYNA

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“…Due to these properties, the AWJ technology represents a unique machining tool. Although the conception of the abrasive water jet is relatively old (the first abrasive mixing heads were already designed in 1935and 1937[Smith, 1936, [Tirrell 1939]), the real abrasive water jet [Hashish 1987] appeared for the first time in 1979. Since then, the AWJs have been applied in many sectors of industry and all versions of AWJ are largely used for cutting, especially.…”

Section: Abrasive Waterjetsmentioning

confidence: 99%

“…The objective of this research was not only to compare most commercially available garnet abrasives used in the abrasive waterjet technology [Foldyna 1992b], [Foldyna 2000], [Foldyna 2001], [Martinec 2002b], but also to test other rather unusual concentrates, recycled abrasive, etc. Based on the knowledge and detailed studies of properties of abrasive materials (e.g.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of Quality of Nine Aluminium Alloys Surfaces Created Using Abrasive Waterjet

Klichová¹,

Klich²,

Gurkova³

2016

MM SJ

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“…Many milling parameters have been investigated by various researchers which could be categorized as follows: 1) Design parameters: impact chamber volume which should be big enough to avoid turbulence and determines the capacity of milling [1,8]; mixing unit geometry through which the particles disperse into the gas flow [9,10] and geometry of nozzle which controls the velocity of particles [3,8,11]. 2) Processing parameters: the pressure of the carrier fluid which determines the impact energy [12]; feed rate which defines the concentration of a jet and thus the particles interaction [8,10]; the impact angle which is the angle between the jet of particles and the target [12][13][14] and finally the target material which its young modulus defines particle disintegration after impact [3,10].…”

Section: Introductionmentioning

confidence: 99%

Production of grey cast iron powder via target jet milling

2012

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Target jet milling was used for the first time to convert cast iron scraps to powder. An experimental apparatus was designed which comprised a compressor, a mixing section, a nozzle, an impact chamber and two suction machines. Milling parameters i.e. the target to nozzle distance, the feed rate and the impact angle were optimized through appropriate tests. The travel distance of 8 cm and the impact angle of 90°were found to be ideal parameters of milling. The effect of feed rate on production of powders greater than 45 μm was found to be opposite to the production of the fines (b 45 μm). Investigation of the fragmentation procedure of particles revealed that, the existence of graphite flakes in cast iron matrix plays the most important role in particle breakage.

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Comminution of material particles by water jets — Influence of the inner shape of the mixing chamber

Cited by 29 publications

References 4 publications

Disintegration and recycling possibility of selected abrasives for water jet cutting

Disintegration and recycling possibility of selected abrasives for water jet cutting

Study of Quality of Nine Aluminium Alloys Surfaces Created Using Abrasive Waterjet

Production of grey cast iron powder via target jet milling

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