scholarly journals Enhancing the AWJ Cutting Performance by Multipass Machining with Controlled Nozzle Oscillation

2005 ◽  
Vol 291-292 ◽  
pp. 453-458 ◽  
Author(s):  
Jun Wang ◽  
S. Xu
Keyword(s):  
Experimental Investigation ◽  
Alumina Ceramic ◽  
Cutting Performance ◽  
Abrasive Waterjet ◽  
Depth Of Cut ◽  
Application Domain ◽  
Process Variables ◽  
Geometrical Features ◽  
Cutting Capacity ◽  
Awj Cutting

The cutting performance in abrasive waterjet (AWJ) multipass cutting with and without controlled nozzle oscillation is presented based on an experimental investigation cutting an 87% alumina ceramic. The cutting capacity in terms of the depth of cut and the kerf geometrical features is analyzed with respect to the process variables. It is found that multipass cutting is a viable means to increase the cutting performance and application domain of this technology, while a further increase in the cutting performance can be made by using a controlled nozzle oscillation technique.

scholarly journals Profile Cutting on Alumina Ceramics by Abrasive Waterjet. Part 1: Experimental Investigation

2006 ◽  
Vol 220 (5) ◽  
pp. 703-714 ◽  
Author(s):  
J Wang ◽  
H Liu
Keyword(s):  
Experimental Investigation ◽  
Performance Measures ◽  
Process Parameters ◽  
Cutting Performance ◽  
Cutting Process ◽  
Abrasive Waterjet ◽  
Depth Of Cut ◽  
Curvature Radius ◽  
Alumina Ceramics ◽  
Awj Cutting

An experimental investigation is presented of the various cutting performance measures, such as the kerf taper and depth of cut, in profile cutting on an 87 per cent alumina ceramic by abrasive waterjet (AWJ) over a wide range of process parameters. It is found that the taper angles on the two kerf walls produced in cutting AWJ of profiles are different in magnitude and exhibit different trends as the profile curvature radius varies. Moreover, the depth of cut increases with an increase in the curvature radius and approaches its maximum in straight cutting. The other process variables affect the cutting process in a way similar to that in straight cutting. Recommendations are finally made for the selection of process parameters in AWJ profile cutting of alumina ceramics. Predictive mathematical models for the major cutting performance measures that are essential for the optimization of the AWJ cutting process are reported in the subsequent part of this investigation.

A Focused Review on Enhancing the Abrasive Waterjet Cutting Performance by Using Controlled Nozzle Oscillation

2009 ◽  
Vol 404 ◽  
pp. 33-44 ◽  
Author(s):  
Jun Wang
Keyword(s):  
Process Parameters ◽  
Cutting Performance ◽  
Abrasive Waterjet ◽  
Depth Of Cut ◽  
Waterjet Cutting ◽  
Abrasive Waterjet Cutting ◽  
Engineering Materials ◽  
Awj Cutting ◽  
Cutting Modes ◽  
Selection Of

Increasing the performance of the abrasive waterjet (AWJ) cutting technology for engineering materials is the ultimate aim of research in this field. This paper presents a review on the studies using a controlled nozzle oscillation technique to increase the cutting performance of the AWJ cutting technology and the associated mechanisms primarily based on the work in the author’s laboratory. Primary attention is paid to the discussions of the depth of cut, the effect and selection of process parameters and the advantages by using this technique in both single- and multi-pass cutting modes.

scholarly journals Modelling the Depth of Jet Penetration in Abrasive Waterjet Contouring of Alumina Ceramics

2004 ◽  
Vol 471-472 ◽  
pp. 462-468
Author(s):  
Jun Wang ◽  
H. Liu ◽  
Chuan Zhen Huang
Keyword(s):  
Experimental Data ◽  
Experimental Investigation ◽  
Mathematical Models ◽  
Alumina Ceramic ◽  
Abrasive Waterjet ◽  
Alumina Ceramics ◽  
Predictive Capability ◽  
Jet Penetration ◽  
Good Agreement

Predictive mathematical models for the depth of jet penetration are presented for both straight-slit cutting and contouring by an abrasive waterjet (AWJ). The plausibility and predictive capability of the models are assessed and verified by an experimental investigation when cutting an 87% alumina ceramic. It shows that the predictions of the models are in good agreement with the experimental data.

scholarly journals Profile Cutting on Alumina Ceramics by Abrasive Waterjet. Part 2: Cutting Performance Models

2006 ◽  
Vol 220 (5) ◽  
pp. 715-725 ◽  
Author(s):  
J Wang ◽  
H Liu
Keyword(s):  
Performance Measures ◽  
Predictive Models ◽  
Cutting Performance ◽  
Abrasive Waterjet ◽  
Depth Of Cut ◽  
Alumina Ceramics ◽  
Predictive Capability ◽  
Performance Models ◽  
Kerf Taper ◽  
Model Predictions

Predictive models for the major cutting performance measures, such as the kerf taper and depth of cut, are developed for both straight-slit cutting and profile cutting by an abrasive waterjet. The plausibility and predictive capability of the models are assessed and verified by comparing the model predictions with the corresponding experimental data. Very good correlations between the predicted and experimental results have been found, which confirm the adequacy of the models for use in process planning.

Effect of Cutter Performance on Finished Tooth Form in Gear Shaving

1992 ◽  
Author(s):  
I. Moriwaki ◽  
M. Fujita
Keyword(s):  
Computer Simulation ◽  
Mean Value ◽  
Cutting Performance ◽  
Simulation Program ◽  
Tooth Surface ◽  
Depth Of Cut ◽  
Small Depth ◽  
Computer Simulation Program ◽  
Tooth Form ◽  
Cutting Model

Abstract The authors have been developed a computer simulation program of gear shaving. In the present paper, a new cutting model of shaving process is proposed so as to incorporate an effect of a cutting performance of shaving cutter into the simulation program. In this cutting model, it is assumed that a tooth flank material of work gear can be removed only when a depth of cut of a cutting edge exceeds a certain criterion. It is also assumed that the criterion have no definite value but has the nominal distribution over the tooth surface. The mean value of the distribution can define a characteristic of cutting performance of shaving cutter. The small mean value means that even small depth of cut can cause a stock removal; i.e. a good cutter performance. The computer simulations on gear shaving are performed to reveal the effect of the cutter performance on shaved tooth form. Under the conditions used in these simulations, the pressure angle error on the shaved tooth profile becomes remarkable as the cutter performance becomes worse. Thus, the developed computer simulation program of gear shaving has a reliability on the prediction of shaved tooth form. It will be useful for design of shaving cutter, judgement of tool life, and so on.

scholarly journals Precise Drilling of Holes in Alumina Ceramic (Al2O3) by Rotary Ultrasonic Drilling and its Parameter Optimization using MOGA-II

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1059 ◽  
Author(s):  
Hisham Alkhalefah
Keyword(s):  
Feed Rate ◽  
Dimensional Accuracy ◽  
Alumina Ceramic ◽  
Process Variables ◽  
Multi Objective Genetic Algorithm ◽  
Ultrasonic Drilling ◽  
Drilling Quality ◽  
Processing Techniques ◽  
Validation Tests ◽  
Rotary Ultrasonic Drilling

Alumina is an advanced ceramic with applications in dental and medical sciences. Since ceramics are hard and brittle, their conventional machining is expensive, arduous, and time-consuming. As rotary ultrasonic machining is among the most adequate and proficient processing techniques for brittle materials like ceramics. Therefore, in this study, rotary ultrasonic drilling (RUD) has been utilized to drill holes on alumina ceramic (Al2O3). This study investigates the effect of key RUD process variables, namely vibration frequency, vibration amplitude, spindle speed, and feed rate on the dimensional accuracy of the drilled holes. A four-variable three-level central composite design (thirty experiments on three sample plates) is utilized to examine the comparative significance of different RUD process variables. The multi-objective genetic algorithm is employed to determine the optimal parametric conditions. The findings revealed that material removal rates depend on feed rate, while the cylindricity of the holes is mostly controlled by the speed and feed rate of the spindles. The optimal parametric combination attained for drilling quality holes is speed = 4000 rpm, feed rate = 1.5 (mm/min), amplitude = 20 (µm), and frequency = 23 (kHz). The validation tests were also conducted to confirm the quality of drilled holes at the optimized process parameters.

Sign in / Sign up

Export Citation Format

Share Document