Papers by Keyword: Abrasive Waterjet Machining

Abstract: Abrasive waterjet machining is considered as a promising technique in hard-brittle material polishing. In this paper, The ultrasonic torsional vibration is considered to apply on the workpiece to improve the abrasive waterjet polishing quality and efficiency. The process parameters in the ultrasonic torsional vibration-assisted abrasive waterjet polishing are optimized. The ultrasonic torsional vibration in the role of the abrasive waterjet polishing is investigated. The results show that the application of ultrasonic torsional vibration can effect of abrasive particle movement and increase the critical depth of the ceramic materials.

Abstract: Abrasive waterjet machining (AWJM) is one of the non-traditional machining processes used for machining hard and difficult materials including metal matrix composites (MMCs) and ceramic matrix composites (CMCs). MMCs and CMCs are widely used in the industries such as automobile, aerospace, defense, etc. In AWJM, the material is removed by a narrow stream of high pressure water along with abrasive particles. This work, reviews the research work carried out on the machining aspects of MMCs and CMCs using AJWM. Most of the research work in MMCs is carried out on aluminum based matrix reinforced with ceramics such as silicon carbide (SiC) and aluminum oxide (Al₂O₃) in various proportions. In the case of CMCs, the research work mostly are carried out on alumina (Al₂O₃) based work specimen. Generally, it is observed that the reinforcement particles in the MMCs and CMCs greatly influence the output process parameters like depth of the cut, material removal rate (MRR), surface roughness (R_a), kerf width, etc. From the literature review, it is observed that the increase in volume percentage of reinforced abrasive particles results in decreased MRR, decreased in the depth of cut and increase in the R_a. This work also covers the future research work in the machining aspects of MMCs and CMCs.

Abstract: This paper presents a new study on the recycling of Supreme garnet (or IMC garnet) in abrasive waterjet machining. In this study, the reusability of the garnet was investigated. Also, the optimal particle size for the recycling of the garnet was pointed out. In addition, the cutting performance and the cutting quality of the recycled abrasive were investigated by comparing with that of new abrasives. From the results, the way how to recycle effectively the garnet was proposed.

Abstract: The erosion process of abrasive waterjet (AWJ) on target material is very complicated and a complete clear understanding about material removal mechanisms in AWJ machining has not been obtained. In this paper, an experiment study on AWJ machining mechanisms of brittle materials is introduced so as to understand the actions of water jet and abrasive particle in material removal process and some experiment evidences of the change of material removal mechanisms have been obtained.

Abstract: Coloring stainless steel is a kind of corrosion-resistant and ornamental industry material. Whereas, the oxide film on stainless steel is sensitive to heat. At about 200
, the oxide film would be oxidized or dehydrated. With lesser cutting force and no thermal influence on target material, AWJ may be a suited method in cutting coloring stainless steel. In this paper, an experimental study on cutting coloring stainless steel by abrasive waterjet was carried out. By analyzing macroscopic features of kerfs, a damage model was established and a principle to optimize process parameters was presented.

Abstract: As a unique machining way, Abrasive Waterjet Machining (AWJ) is one of the fastest developing new non-traditional machining methods and has a wide range of machinable materials. In this paper, the machining mechanism in AWJ is theoretically analyzed by impact dynamic mechanics method. There is stagnancy layer between waterjet and workpiece surface. It is found that the stagnancy layer and low energy abrasive particle are the main factors, which weaken machining capability and effective utilizing ratio of energy of AWJ machining. Ultrasonic Vibration Abrasive Waterjet Machining, a new machining method, is put forward and the influence of ultrasonic vibration on machining mechanism of AWJ machining is discussed.