scholarly journals Abrasive Water Jet Cutting of Hardox Steels—Quality Investigation

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1652
Author(s):  
Tibor Krenicky ◽  
Milos Servatka ◽  
Stefan Gaspar ◽  
Jozef Mascenik
Keyword(s):  
Surface Quality ◽  
Cutting Parameters ◽  
Traverse Speed ◽  
Quality Parameters ◽  
Water Jet ◽  
Regression Equations ◽  
Abrasive Water Jet ◽  
Water Jet Cutting ◽  
Declination Angle ◽  
Relationship Of

The paper aims to study the surface quality dependency on selected parameters of cuts made in Hardox™ by abrasive water jet (AWJ). The regression process was applied on measured data and the equations were prepared for both the Ra and Rz roughness parameters. One set of regression equations was prepared for the relationship of Ra and Rz on cutting parameters—pumping pressure, traverse speed, and abrasive mass flow rate. The second set of regression equations describes relationships between the declination angle in kerf as the independent variable and either the Ra or the Rz parameters as dependent variables. The models can be used to predict cutting variables to predict the surface quality parameters.

Studied for Mechanism of that Abrasive Water Jet Cutting Metal Materials

2014 ◽  
Vol 513-517 ◽  
pp. 218-222
Author(s):  
Zheng Long Zou ◽  
Xiong Duan ◽  
Chu Wen Guo
Keyword(s):  
Cutting Parameters ◽  
Damage Mechanism ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Deformation And Failure ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Electron Microscope Analysis ◽  
Metal Materials ◽  
Selection Of

Combining with the electron microscope analysis of the morphology of incision, the mechanism of abrasive water jet cutting metal materials was carried out to explore, for the rational selection of abrasive jet cutting parameters, to extend its application to provide the basis. Study shows that the abrasive water jet cutting metal materials, the material damage mechanism is mainly to yield deformation and failure and shear of grinding damage, grooving formation is mainly caused by falling impact deformation and furrows grinding.

scholarly journals Impact of Preparation of Titanium Alloys on Their Abrasive Water Jet Machining

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7768
Author(s):  
Adam Štefek ◽  
Martin Tyč
Keyword(s):  
Titanium Alloys ◽  
Niti Alloy ◽  
Traverse Speed ◽  
Structural Features ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Abrasive Water Jet Machining ◽  
Declination Angle ◽  
The Impact ◽  
Awj Cutting

Several titanium alloys, i.e., grade 2 Ti, Ti6Al4V and NiTi alloy, prepared by selected deformation procedures were subjected to abrasive water jet (AWJ) cutting and subsequently analysed. The study describes samples’ preparations and respective material structures. The impact of deformation processing of the selected alloys on the declination angle during cutting, and the results of measurements of surface wall quality performed for the selected samples at the Department of Physics of Faculty of Electrical Engineering and Computer Science at VŠB–Technical University of Ostrava, are presented and discussed, as are also the influences of structural features of the processed titanium alloys on surface qualities of the investigated samples. The results showed that the highest resistance to AWJ machining exhibited the Ti6Al4V alloy prepared by forward extrusion. Its declination angle (recalculated to the thickness 10 mm to compare all the studied samples) was 12.33° at the traverse speed of 100 mm/min, pumping pressure of 380 MPa, and abrasive mass flow rate of 250 g/min.

scholarly journals Revised Model of Abrasive Water Jet Cutting for Industrial Use

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4032
Author(s):  
Libor M. Hlaváč
Keyword(s):  
Traverse Speed ◽  
Theoretical Description ◽  
Water Jet ◽  
Analytical Models ◽  
Abrasive Water Jet ◽  
Nozzle Orifice ◽  
Measuring Devices ◽  
Water Jet Cutting ◽  
Improved Model ◽  
Awj Cutting

Research performed by the author in the last decade led him to a revision of his older analytical models used for a description and evaluation of abrasive water jet (AWJ) cutting. The review has shown that the power of 1.5 selected for the traverse speed thirty years ago was influenced by the precision of measuring devices. Therefore, the correlation of results calculated from a theoretical model with the results of experiments performed then led to an increasing of the traverse speed exponent above the value derived from the theoretical base. Contemporary measurements, with more precise devices, show that the power suitable for the traverse speed is essentially the same as the value derived in the theoretical description, i.e., it is equal to “one”. Simultaneously, the replacement of the diameter of the water nozzle (orifice) by the focusing (abrasive) tube diameter in the respective equations has been discussed, because this factor is very important for the AWJ machining. Some applications of the revised model are presented and discussed, particularly the reduced forms for a quick recalculation of the changed conditions. The correlation seems to be very good for the results calculated from the present model and those determined from experiments. The improved model shows potential to be a significant tool for preparation of the control software with higher precision in determination of results and higher calculation speed.

Depth of Penetration and Surface Roughness Analysis of Al6061 cut by Abrasive Water Jet

2021 ◽  
Vol 58 (1) ◽  
pp. 5412-5417
Author(s):  
Prabhu Swamy N R Et al.
Keyword(s):  
Surface Roughness ◽  
Surface Finish ◽  
Traverse Speed ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Average Surface Roughness ◽  
Depth Of Penetration ◽  
Average Surface ◽  
Water Jet Cutting ◽  
Model Equations

In this study, model equations to predict average surface roughness value of abrasive water jet cut aluminium 6061 alloy are developed. Model equations are developed considering water jet pressure, abrasive flow rate and traverse speed of the jet. Model equations help in knowing average surface roughness value on the cutting and deformation wear regions. 27 abrasive water jet cutting experiments are conducted on trapezoidal shaped aluminium 6061 block. Depth of penetration values are found for all experimental cutting conditions. Average surface roughness values are found by non-contact surface roughness tester. Surface roughness testing is carried out along the length of depth of penetration.  Low and high average surface roughness values are noticed on the cutting and deformation wear regions respectively.  Smooth surface finish and rough surface finish with striations are observed on the cutting and deformation wear regions respectively.   

Application of Pre-Mixed Abrasive Water Jet Technology on Cutting Brazilian Disc

2012 ◽  
Vol 591-593 ◽  
pp. 472-475
Author(s):  
Dong Su Zhang ◽  
Gan Lin Cheng ◽  
Jian Deng
Keyword(s):  
New Technology ◽  
Cutting Parameters ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Time Saving ◽  
Brazilian Disc ◽  
Advantages And Disadvantages ◽  
Cutting Machine ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting

High pressure water jet technology is a new technology, its applications are increasingly widespread, by analyzing the advantages and disadvantages of the existing processing methods and the degree of difficulty that processes the Brazilian disc specimen (Brazilian disc), in order to get high quality of the incision and tiny slit width,it was used in the process of cutting Brazil disc specimens can be better cut quality,we put forward utilizing the pre-mixed abrasive water jet to cut requiring Brazilian disc, cutting test showed that the premixed abrasive water jet cutting machine tools is more easily to meet the test requirements of machine processing test, and obtain the reasonable cutting parameters the entire process is fully automated, by the preparation of CNC program, we can completed Brazil disc of processing at one time,saving a lot of manpower and material resources, so pre-mixed abrasive water jet cutting machine apply to cut Brazil disk has good application prospect.

scholarly journals A New Strategy for Improving the Surface Quality of Ti6Al4V Machined by Abrasive Water Jet: Reverse Cutting with Variable Standoff Distances

2021 ◽  
Author(s):  
Jie Xiong ◽  
Liang Wan ◽  
Yi'nan Qian ◽  
Shuo Sun ◽  
Deng Li ◽  
...  
Keyword(s):  
Surface Quality ◽  
Traverse Speed ◽  
Water Jet ◽  
Abrasive Water Jet ◽  
Machined Surface ◽  
Aerospace Vehicles ◽  
Kerf Taper ◽  
New Strategy ◽  
Titanium Alloy Ti6al4v

Abstract Titanium alloys are widely used in important structures of aerospace vehicles, but the low thermal conductivity and high chemical activity make them difficult to process. As an untraditional machining technology, abrasive water jet (AWJ) has been proven to be an effective method for this kind of material. Aimed at further improving the cutting performance, reverse cutting with variable standoff distance (SOD) strategy was put forward, and experiments of titanium alloy Ti6Al4V machined by AWJ were conducted. The influence of SOD with different reverse cutting types on the kerf quality was studied to obtain the optimal SOD combinations. Ra, Sa and kerf taper were used to evaluate the quality of the machined surface. Moreover, the results of reverse cutting at the same speed and efficiency and single cutting at the constant SOD were compared and analyzed. It was found that the proposed strategy results in higher kerf quality in the aspect of surface roughness, compared to the single cutting. To be more specific, for the reverse trimming cutting, the improvements of Ra and Sa can reach up to 62.8% and 73.1% respectively under the condition of the SOD of the second cutting is 8mm. Furthermore, the kerf taper can be reduced 26.1% when the SOD of the second cutting is 2mm. With respect to the reverse deepening cutting, even the traverse speed of reverse cutting is set as twice as that of a single cutting, the kerf quality is still better. Additionally, when the SOD of the second cutting is 4mm, the improvements of Ra and Sa can reach up to 51.7% and 14.9%, respectively, and the kerf taper is reduced by 20.2%. This study provides a new method for improving the machined surface quality of hard materials, especially for Ti6Al4V.

scholarly journals Analyses of Vibration Signals Generated in W. Nr. 1.0038 Steel during Abrasive Water Jet Cutting Aimed to Process Control

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 345
Author(s):  
Martin Tyč ◽  
Irena M. Hlaváčová ◽  
Pavel Barták
Keyword(s):  
Traverse Speed ◽  
Water Jet ◽  
Vibration Monitoring ◽  
Abrasive Water Jet ◽  
Vibration Signals ◽  
Water Jet Cutting ◽  
Abrasive Water Jet Cutting ◽  
Evaluation Of Data ◽  
Awj Cutting ◽  
The Relationship

The presented research was aimed at finding a suitable tool and procedure for monitoring undercuts or other problems such as cutting without abrasive or inappropriate parameters of the jet during the abrasive water jet (AWJ) cutting of hard-machined materials. Plates of structural steel RSt 37-2 of different thickness were cut through by AWJ with such traverse speeds that cuts of various qualities were obtained. Vibrations of the workpiece were monitored by three accelerometers mounted on the workpiece by a special block that was designed for this purpose. After detecting and recording vibration signals through the National Instruments (NI) program Signal Express, we processed this data by means of the LabVIEW Sound and Vibration Toolkit. Statistical evaluation of data was performed, and RMS was identified as the parameter most suitable for online vibration monitoring. We focus on the analysis of the relationship between the RMS and traverse speed.

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