Improving the cut surface qualities using different controlled nozzle oscillation techniques

Chen, F.L.; Σιώρης, Ηλίας; Patel, Keyurkumar J.

doi:10.1016/s0890-6955(01)00161-4

Cited by 24 publications

(3 citation statements)

References 4 publications

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“…It is again possible, in agreement with general opinion, to speak about the complexity of the issues to be resolved, both from the experimental and analytical perspective. From numerous published research works, which dealt with these issues, and which can be used as sources of opinions, we can cite the works . The issues concerning the laser and other technologies using flexible working tool are complicated by considerable differences of the tool feed rate along the surface of the sample in comparison with the rate of penetration of the disintegration tool into material, i.e.…”

Section: Process Timingmentioning

confidence: 99%

Control of laser cutting by process timing

Harničárová

Valíček

Kušnerová

et al. 2015

Materialwissenschaft Werkst

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Investigation into the assessment of the end product quality of laser cutting becomes essential. There is still a substantial number of research questions that are dedicated to such things as the analysis of cutting problems, or control of laser cutting. This study proposes a procedure for timing of the process by solution of the implicitly expressed relation between the function of time and the depth of cut. The solution realised in the research paper provides the following: a derivation of the method of identification of the influence of the time parameter and of timing of the process functions in the cut.

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Section: Process Timingmentioning

confidence: 99%

Control of laser cutting by process timing

Harničárová

Valíček

Kušnerová

et al. 2015

Materialwissenschaft Werkst

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“…Whereas in models published in [ 11 , 12 , 13 , 14 ], the data used for the proposed models’ verification came from the cutting of nonmetal, rather brittle, materials, e.g., granite, perspex or ceramics, other authors focused their attention on metals, like Hashish did. Arola and Ramulu found that the depth of subsurface plastic deformation is inversely proportional to a metal’s strength coefficient [ 18 ], Chen et al improved the cutting quality of mild steel by controlled nozzle oscillations [ 19 ], Hascalik et al studied the depth of cut and smooth cutting region on titanium [ 20 ], Hlaváč et al proposed a method for the compensation of the jet retardation and the taper [ 21 ], and Monno et al studied the influence of heat treatment on the kerf roughness of carbon steel cut by AWJ [ 22 ]. Some of these researchers prepared models for the process description, while others focused on specific problems, among which the geometric accuracy, surface integrity and kerf roughness are achieving much attention [ 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Steel Structure on Machinability by Abrasive Water Jet

et al. 2020

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Although the abrasive waterjet (AWJ) has been widely used for steel cutting for decades and there are hundreds of research papers or even books dealing with this technology, relatively little is known about the relation between the steel microstructure and the AWJ cutting efficiency. The steel microstructure can be significantly affected by heat treatment. Three different steel grades, carbon steel C45, micro-alloyed steel 37MnSi5 and low-alloy steel 30CrV9, were subjected to four different types of heat treatment: normalization annealing, soft annealing, quenching and quenching followed by tempering. Then, they were cut by an abrasive water jet, while identical cutting parameters were applied. The relations between the mechanical characteristics of heat-treated steels and the surface roughness parameters Ra, Rz and RSm were studied. A comparison of changes in the surface roughness parameters and Young modulus variation led to the conclusion that the modulus was not significantly responsible for the surface roughness. The changes of RSm did not prove any correlation to either the mechanical characteristics or the visible microstructure dimensions. The homogeneity of the steel microstructure appeared to be the most important factor for the cutting quality; the higher the difference in the hardness of the structural components in the inhomogeneous microstructure was, the higher were the roughness values. A more complex measurement and critical evaluation of the declination angle measurement compared to the surface roughness measurement are planned in future research.

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“…Major shortcomings of the present‐day state are that test methods are not yet developed, which could be used in unambiguous testing of the basic properties of the cut material, i.e. the cuttability of the material using an abrasive waterjet, in advance, further a waterjet, a method not yet developed, which could be used in practice and research for the determination of the optimum technology parameters (traverse speed of the cutting head, pump pressure, amount, size and kind of abrasive material, and others) according to the pre‐determined cuttability of a specific material using an abrasive waterjet (AWJ) . On the basis of the above‐presented causes, a uniform technological classification of engineering materials according to deformation parameters is still missing, because of the lack of a suitable generalizing criterion which would unambiguously characterize the cut material .…”

Section: Introductionmentioning

confidence: 99%

A new approach for the determination of technological parameters for hydroabrasive cutting of materials

Valíček

Harničárová

Hlavatý

et al. 2016

Materialwissenschaft Werkst

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A method for the design of a technology for the abrasive waterjet cutting of materials is based on the determination of the constant of cuttability of materials using an abrasive waterjet Kawj according to four different versions. Version A, where three deformation parameters are measured on the test cut/sample, namely selected depth hx [mm], local roughness Rax [μm] at depth hx and local deviation of the cut trace from the normal plane Yretx at depth hx. Version B, where merely two deformation parameters are measured, namely the reference depth het [mm] and deviation of the cut trace from the normal plane Yretx [mm] or, according to version C, where one parameter is mearured, namely either the ultrasonic wave speed vLUZ [m · s–1] or Young's modulus Emat [MPa]; Kawj being calculated from relevant deformation parameters. The last option is version D, where the design of the whole technology is carried out by calculation of Kawj according to the Young's modulus Emat or according to the ultrasonic wave speed vLUZ of the cut material.

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Improving the cut surface qualities using different controlled nozzle oscillation techniques

Cited by 24 publications

References 4 publications

Control of laser cutting by process timing

Control of laser cutting by process timing

Influence of Steel Structure on Machinability by Abrasive Water Jet

A new approach for the determination of technological parameters for hydroabrasive cutting of materials

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