Wyniki wyszukiwania - Biblioteka Nauki

1

Technique for spatial objects shaping with abrasive-water jet controlled by virtual image luminance

100%

Borkowski P. , Borkowski P.

|

nr 3

2

Roughness Parameters Calculation By Means Of On-Line Vibration Monitoring Emerging From AWJ Interaction With Material

83%

Hreha P. , Radvanska A. , Knapcikova L. , Królczyk G. M. , Legutko S. , Królczyk J. B. , Hloch S. , Monka P.

|

nr 2

3

Measurement and analysis of pocket milling features in abrasive water jet machining of Ti-6Al-4V alloy

71%

Natarajan Y. , Raj K. L. N. , Tandon P.

|

tom Vol. 23, no. 1

art. no. e42, 2023

EN

The present work deals with the size effect of abrasive water jet milling parameters on the square pockets of Ti-6Al-4V alloy. In this study, the abrasive mesh size, water jet pressure and traverse rate were chosen as milling variables and their effect on pocket features such as depth of cut, undercut, material removal rate, and surface roughness were examined. This study also characterizes the milled pocket surfaces under different milling conditions. Most of the measurements and surface characterizations were done using the Dino-Lite Digital Microscope. For both #80 and #100 abrasives, the AWJ-milled pockets were formed with variations in depth milled and rugged surface by increasing the water jet pressure from 175 to 200 MPa under all the selected traverse rate conditions. Also, the variations of depth of cut in successive trajectories found to have a speed bump effect. At these settings, distribution of energy to the work material was more due to deceleration of jet in the boundary close by and changes made in the feed directions in raster path from 0° to 90° at a step-over distance of 0.2 mm. This yielded undercuts in the milled pocket corners. However, there was a significant reduction in the undercut with a water jet pressure of 125 MPa and a traverse rate of 3500 mm/min were employed. Besides, the abrasive mesh size #100 had a better surface topography, and also strong jet footprints were observed with mesh size of #80. Based on the experiments results, the size effect of different milling parameters was seen having influence on the pocket geometry and surface features.

4

Oddziaływanie warunków procesu cięcia AWJ na wybrane wskaźniki SGP

71%

Borkowski J. A. , Sutowska M.

Pomiary Automatyka Kontrola

|

2012

|

tom R. 58, nr 5

468-470

PL

Ukształtowanie geometryczne powierzchni przeciętych strugą wodno-ścierną, będące efektem interakcji strugi z materiałem obrabianym, stanowi ważny aspekt jakości procesu cięcia. W artykule opisano wpływ ciśnienia wody pw, prędkości posuwu vf i promienia trajektorii głowicy tnącej r na wartość wskaźników amplitudowych chropowatości powierzchni. Na podstawie wyników prac eksperymentalnych ustalono zależności występujące między rozpatrywanymi parametrami procesu cięcia i wskaźnikami jakościowymi. Dzięki temu określono wskaźniki SGP, charakterystyczne dla omawianego rodzaju obróbki, których wartości w znacznym stopniu zależą od zmiany zasadniczych parametrów procesu cięcia.

EN

Essential development of concentrated energy flux methods of cutting have been noticed recently, that mainly concerns high-pressure water jet including abrasive admixtures. Geometrical shaping of surface cut with high-pressure abrasive-water jet is an effect of interaction of the jet with the target material and is an important aspect of cut quality. Because of the limited literature information concerning purposeful steering of respective SGP parameters during high-pressure AWJ, it is indispensable to isolate such parameters experimentally. Their values strongly depend on water pressure change pw, feed rate vf, and on radius of the cutting head trajectory r. The paper describes the influence of cutting conditions change on the values of surface roughness amplitude parameters. Basing on experimental results one can determine dependences occurring between considered cutting parameters and quality indicators. Moreover it is possible to define SGP parameters that are characteristic for discussed AWJ cutting and their values are strongly dependent on the change of basic cutting parameters.

5

Surface texture analysis of the X5CrNi18-10 steel after cutting with abrasive water jet and photon beam (laser)

59%

Romanowski M. , Nadolny K.

|

tom Vol. 4, No 4

365--374

EN

The article presents an analysis of the geometric structure of the surface of X5CrNi18-10 steel sheet after cutting with a abrasive water-jet (AWJ) and a photon beam (laser). Both methods and the workpiece material were also described. Using the laser triangulation method, the cut surface texture was measured by opto-digital microscopy. Additionally, microscopic images of the cut surface were made using the Dino-Lite Edge AM7915MZT microscope by ANMO Electronics Co. The analysis of changes in the value of the Sa parameter for the surface after laser cutting and abrasive water-jet showed that the thickness of the cut material has the most significant influence on the obtained measurement results.

6

Vibrations of the technological head of the abrasive water jet during cutting of structural stee

59%

Krenicky T. , Mascenik J. , Ruzbarsky J. , Coranic T. , Olejarova S.

|

2024

|

tom vol. 42, iss. 3

174--181

EN

Vibration measurement is a fundamental aspect of ensuring the optimal and reliable operation of machinery, with implications for production quality, economic efficiency, and safety. The monitoring of machine condition provides essential data for the early detection of damage to machine parts, thereby preventing unanticipated failure modes and disruptions in production. Accordingly, this paper focuses on the measurement and assessment of fundamental vibration parameters, with a particular emphasis on frequency and vibration acceleration amplitude that allows to optimize the production quality assessment. Experimental measurements were conducted on a technological head of production system using abrasive water jet technology (AWJ) with a varied feed rate while cutting two types of structural steel. Based on the results of these measurements, recommendations were formulated regarding suitable and inappropriate combinations of operating parameters, thereby enhancing current knowledge regarding the influence of technological parameters on the amplitudes of vibration acceleration in the operation of production systems with AWJ technology.