... Title : Development of an Abrasive Water Jet Optimum Abrasive Flow Rate Model for Titanium Alloy Cutting (Preprint). Descriptive ...
DTIC Science & Technology
... Title : Water Jet and Abrasive Water Jet Cutting of Unidirectional Graphite/Epoxy Composite. Descriptive Note : Journal article,. ...
... 1 0 0 (5) In the above equation, assume all abrasive particles have the same speed. ... The energy of the abrasives can then be expressed as, 2 ...
Optimising the Focus Tube Length for Abrasive Water Jet Using Numerical Simulations 14 Optimising the Focus Tube Length for Abrasive Water Jet Using Numerical Simulations by Dewan Hasan Ahmed Rowan Deam water jet which is used as a ...
E-print Network
... Title : Wear of Si3N4 Ceramics by Abrasive Water Jet. ... Abstract : The wear mechanism of ceramics by abrasive water jet (AWJ) has been studied. ...
... Accession Number : ADD802417. Title : Robotic Abrasive Water Jet Trimming of Aerostructure Components. Descriptive Note : Conference paper,. ...
... in the report were obtained using abrasive water jet cutting equipment and ... the speed quoted being the fastest recorded to completely cut the full ...
As the abrasive water jet (AWJ) is used in industry extensively, optimization of the process parameters that determine efficiency, economy and quality of the process is becoming more and more important for its successful application. However, being a comp...
National Technical Information Service (NTIS)
The U.S. Bureau of Mines undertook a basic investigation of collimated abrasive water-jet behavior because a more complete understanding of the fundamental process may lead to further technical advances. Laboratory experiments used 2-mm water-jet nozzles ...
Measurements on 5:1 Scale Abrasive Water Jet Cutting Head Models P.S. Coray1 , B. Jurisevic2 , M. Junkar2 and K.C. Heiniger1 1 Swiss Competence Centre of Water Jet Technology, Laboratory for Thermal There is a vast potential market for high precision parts manufactured by ...
This project addresses a new jet cutting technique termed abrasive suspension jet. An abrasive suspension is formed by mixing abrasives and water in addition to suspension stabilizing additives. The abrasive suspension is then pumped through a nozzle to ...
Unidirectional graphite/epoxy composite material has been machined by water jet and abrasive water jet cutting processes. Topography and morphology of the machined surfaces were evaluated with surface profilometry and scanning electron microscopy. The surface characteristics in terms of ...
NASA Astrophysics Data System (ADS)
This report presents an overview of the use of water-abrasive jets for cutting. Specific references to industrial uses are given.
Energy Citations Database
The results given in the report were obtained using abrasive water jet cutting equipment and represent as follows: (i) For all flat plate samples a range of speeds was tried, the speed quoted being the fastest recorded to completely cut the full section d...
This report gives details of tests conducted to investigate some aspects of the operational safety with respect to frictional sparking of a water/abrasive jet cutting head when used in explosive environments. The tests were carried out on mild steel plate...
As a peculiar issue of the decommissioning of FUGEN, it is necessary to establish a dismantlement method for the reactor having a 224 double-tubes structure arranged with pressure and calandria tubes concentrically. Mechanical cutting method will be desirable considering the influence on the atmospheres because the double-tubes consist of highly activated zirconium alloy and zircaloy material. ...
The U.S. Bureau of Mines has patented and transferred to industry an abrasive-enhanced water-jet rock drill. The drill incorporates three novel components: a collimator, jet deflectors for cutting clearance, and an unpressurized swivel, which rotates at 1...
... For drilling difficult-to-machine materials, abrasive water jet (AWJ) drilling provides several ... is used to study the material removal mechanisms ...
... Title : A Comparison Between CO2 Laser Cutting and Competitive Techniques (Nd:YAG Laser, Plasma Arc, Abrasive Water Jet and Oxygen Flame ...
This document identifies the hazards of using an abrasive water jet to add perforations to the salt well screen in tank 241-A-101.
Page 1. TRANSLATION ABRASIVE PROPERTIES OF MICROCONTAMI NATION AND OXIDATION PRODUCTS OF JET FUELS BY ...
Construction activities that require the placement of gas, electrical, or communication utilities in hard rock will benefit from lightweight systems capable of precisely drilling short, constant-radius arcs. Existing mechanical drilling systems are capable of drilling shallow directional holes, but the equipment is heavy, drilling rates are low, and costs are high. A comparison of approaches for ...
Abrasive jet, water jet, and abrasive flow deburring are not panaceas for the world's deburring problems. They do, however, solve many of the problems where burrs are either difficult to reach or amenable to automation. As seen in this lesson, they can deburr miniature parts as well as ...
In the process of selecting a failed equipment cut-up tool for the Process Facility Modifications (PFM) Project, a system using an Abrasive Water Jet (AWJ) was developed and tested for remote disassembly of failed equipment by the Westinghouse Hanford Company, PFM Mechanical Development Unit.
This report gives details of cutting tests using water/abrasive jets to investigate some of the parameters for cutting high strength concrete. The tests were carried out on sample blocks of both plain and reinforced concrete. Sections up to 700 mm deep co...
A description is given of the many improvements made in the NBS Abrasive Jet Method since publication of the original article describing this rapid, reproducible, and versatile means for measurirg the abrasion resistance of organic and other coatings. (auth)
The usefulness of high-pressure waterjets in cutting hard materials such as concrete, rock, and minerals was significantly improved by entraining selective abrasives into the waterjet. In fact, good entrainment of abrasives into the waterjet was found to ...
The quality of bone cuts is assessed by the accuracy and biological potency of the cut surfaces. Conventional tools (such as saws and milling machines) can cause thermal damage to bone tissue. Water jet cutting is nonthermal; that is, it does not generate heat. This study investigates whether the abrasive jet ...
PubMed
An in-depth discussion of waterjet operation and applications is available here from the Research Center for Advanced Manufacturing (RCAM) at Southern Methodist University. Waterjets are often cited as being much more precise than traditional machining techniques. Be sure not to miss the Next Page button at the bottom; this site is actually three separate pages of topics. These topics are: ...
NSDL National Science Digital Library
Water jet techniques have been used in industrial cutting, drilling and cleaning applications for more than 30 years. Plain water is typically used for the cutting of non-metallic materials. The addition of abrasive substances to the stream allows almost any material to be cut. The first medical applications were ...
Sandia National Laboratories developed a process to identify and remove the hazardous sub-components from dismantled weapons components utilizing real-time radiography and abrasive water-jet cutting. The components were then crushed, granulated, screened,...
The properties of synthetic aluminum oxides (sapphire and ruby) and their applications in watchmaking (watch bearings and watchglasses) and as hard-wearing components such as centering devices for optical fibres and water jet nozzles for material cutting ...
In forging and other metal-working industries, lasers and abrasive water jets are being applied to cut a variety of metal products to improve productivity and reduce costs. As described, both the processes have their unique cutting capabilities and characteristics. Before selecting one, however, users must be aware of how each ...
In laboratory testing, a prototype low-pressure abrasive water-jet system proved more effective in cutting concrete and asphalt than the high-pressure systems tested before. Projected operating costs for the hand-carried unit - a fraction of those of conventional concrete saws and carbide cutting wheels - could mean savings between $15,000 and $20,000 per ...
... Accession Number : ADD877716. Title : ABRASIVE JET MACHINING UNIT TRIMS VOLTAGE REGULATOR MODULES. Corporate Author : ...
The practicality of underwater abrasive water jet cutting technology was studied in experiments. A study of abrasives in slurried form showed that optimum polymer concentration can be selected to suit underwater conditions. For the long-distance transport of slurry from the ocean surface to the ocean floor, a ...
Theoretical and experimental investigations have been performed on the effects of a non-abrasive water jet impinging on a solid surface. The theoretical analysis treats the time-dependent, twodimensional case of an axisymmetric jet impacting on a rigid or non-rigid surface at various velocities, up to 1500 m/s. The ...
Since the 80's the water jet scalpel is an established tool in some surgical fields. It is used in particular in visceral surgery for preparation of parenchymatous organs. By the addition of biocompatible abrasives, this technique is able to effectively machine hard biological tissues. Free defined cutting geometries can be realised in ...
Advances in cutting, grinding, and machining technology are examined in reviews and reports. Topics examined include water-jet and hydrodynamic cutting and machining, electrochemical techniques, lasers in machining, abrasive jet and flow machining, and ultrasonic machining and grinding. Consideration is given to metal cutting with ...
According to the Waterjet Web Reference, "abrasive waterjets are the fastest growing segment of the machine tool industry." This is not surprising when considering how quickly and precisely a tool can be made by using the technology. The site offers a thorough introduction to waterjets, describing how they work and what they can do. Comparisons are made to conventional ...
This two-lesson text on deburring provides engineers and production supervisors with an overall understanding of deburring economics and capabilities. The subject matter includes economics, side effects, process selection techniques, product design influences, standards, plant-wide approaches, and burr formation and prevention. Deburring methods discussed include barrel, centrifugal barrel, ...
This ten lesson text on deburring is designed to provide engineers and production supervisors with an overall understanding of deburring economics and current capabilities. The material included describes economics, side effects, process selection techniques, product design influences, standards, plantwide approaches, burr formation, and prevention. Deburring methods described include barrel, ...
A high-pressure, abrasive water-jet system that removes road-grade pavement offers utilities a financially attractive way of reducing the installation costs of underground cables. This system, mounted on a vehicular power supply and street tested, demonstrated that it can economically and quietly achieve cutting depths of up to 8 in.
Results are presented of an investigation of the effect on cutting of certain abrasive-jet parameters. Two cutting modes that may be obtained during abrasive-jet cutting are identified. The first, cutting wear, is a micromachining process that contributes...
... AND OXIDATION PRODUCTS OF JET FUELS,. ... from thermooxidation origin in fuel ... USSR, TRANSPORTATION, CORROSION, THERMAL STABILITY ...
Water-jet cutting techniques have been used in industrial applications for many different materials. Recently these techniques have been developed into a revolutionary cutting tool for soft tissues in visceral surgery. The present study investigates the usage of this cutting technology for the revision surgery of endoprostheses. In the first part of the study, samples of ...
The technology to cut objects in the ocean's depths with abrasive water jets was examined for possible application in view of the greater water depths and sophistication involved in work on the ocean floor today. A test model was developed to study this technology's safety and practicability. The test model was ...
This literature review presents information on measures for controlling worker exposure to toxic airborne contaminants generated during abrasive blasting operations occurring primarily in the construction industry. The exposures of concern include respirable crystalline silica, lead, chromates, and other toxic metals. Unfortunately, silica sand continues to be widely used in ...
This report represents all testing and analysis of abrasive waterjet cutting technology performed by Flow Industries Inc. under EPRI research contract RP7860-1. Prior work, described in Volume 1, emphasized pure waterjet technology for purposes of cutting roadgrade substrates. Because of inadequate cutting, abrasive augmented waterjets at reduced pressures ...
... Accession Number : ADA075790. Title : Effect of Slurry Abrasion on the Anodic Dissolution of Iron in Water,. Corporate Author ...
In revision surgeries of endoprostheses, the interface between implant and bone cement or bone must be loosened. Conventional tools have many disadvantages because of their size and limited range. Taking advantage of the selective and athermic cutting process, a plain water jet is already used in order to cut soft tissues. This study investigates the ...
Battelle Memorial Institute as part of its U.S. Department of Energy (USDOE) Contract No. DE-AC05-76RL01830 to operate the Pacific Northwest National Laboratory (PNNL) provides technology assistance to qualifying small businesses in association with a Technology Assistance Program (TAP). Qualifying companies are eligible to receive a set quantity of labor associated with specific technical ...
This article discusses the material removal process in bauxite refractory ceramics cut by abrasive water jets. Several parameters of the process were changed during the experiments. The experiments were monitored online by the acoustic emission (AE) technique. It was found that AE signals are able to sense the material removal process ...
An abrasive-fluid jet apparatus and process for drilling holes in rock having a rotary drill bit with multiple abrasive-fluid jet nozzles in the face of the bit and a stationary drill head housing torque generation apparatus and a rotary mounting holding the rotary drill bit beneath and in rotatable relation to the ...
The objective of the paper is to present some considerations concerning the phenomena which develop at the impact of the abrasive particles with the workpiece material, during the surface abrasive jet machining. The effects of impact depend on many factors. By taking into consideration the particles surfaces which act on the workpiece ...
Presently there is one Water Jet cutter in use in the B321 Weld Shop with the possibility of one to three more jet machines being installed in the near future. The water jet machine uses a high pressure water jet to cut various materials. Depending on ...
Sandia National Laboratories developed a process to identify and remove the hazardous sub-components from dismantled weapons components utilizing real-time radiography and abrasive water-jet cutting. The components were then crushed, granulated, screened, and separated into an aluminium and a precious-and-base-metals fraction using air-tables. Plastics ...
The properties of synthetic aluminum oxides (sapphire and ruby) and their applications in watchmaking (watch bearings and watchglasses) and as hard-wearing components such as centering devices for optical fibres and water jet nozzles for material cutting are discussed. Examples are given of the use of diamonds tools for machining such components, including ...
The fracture behavior of 0 DEG/90 DEG sub 3s cross-plied ceramic-matrix composites is evaluated using compact tension specimens. The influence of notch preparation (abrasive water-jet or diamond saw cut) and fatigue precracking is investigated. The extent...
discharge and electro- chemical machining (EDM/ECM), and abrasive water jet machining (AWJM). The objective. Zhu, J. A. Mcgeough, J. Kozak and A. De Silva, New developments in electro- chemical machining, Annals and drilling. Recent developments in MEMS and rapid prototyping manufacturing (RPM) would be impossible without
Water jet drilling of rock is shown to be a feasible method for potential improvement in gaining access to the earth's resources. Drilling rates of up to 280 in./min in sandstone and 40 in./min in granite have been achieved. While the addition of polymers to the jet stream is found advantageous the low (15%) level of ...
This study evaluated the effect of four methods of metal surface preparation and the use of silane on the bond strength between resin and a Noble metal alloy. SEM Examination and x-ray energy-dispersive spectroscopy (EDS) of the various metal surface treatments was also performed. One-hundred metal disks were cast in a Noble metal alloy (Porcelain #76). Ninety disks were polished flat and the ...
... Accession Number : AD0164791. Title : Water and Oil-Resistant, Antistatic and Abrasion-Resistant Finish for Nylon Fabrics. ...
... Accession Number : ADD140288. Title : Corrosion and Abrasion Resistivities to Sea Water and Whirled Sea Sand of TiN-Coated Stainless Steel,. ...
This paper seeks to identify such a standard procedure with an explanation with the reasons for choice with the different stages undertaken. As an example case the design of a system for optimizing the cutting of granite is described. The paper discussed the results in light of the way in which the waterjets penetrate the granite. Improvements in performance of the system with the addition of ...
This paper serves to report on a continuing investigation of the parameters controlling DIAjet cutting, with particular emphasis on the drilling and cutting of rock. DIAJET EQUIPMENT The equipment to be used in this work is a conventional commercially available direct injection of abrasive batch unit which is normally operated at jet pressures of up to 35 ...
The design and use of equipment to perform work in radioactive environments is uniquely challenging. Some tasks require that the equipment be operated by a person wearing a plastic suit or full face respirator and donning several pairs of rubber gloves. Other applications may require that the equipment be remotely controlled. Other important, design considerations include material compatibility, ...
We present measurements of the tensile strength and abrasion susceptibility of pure and impure polycrystalline ice samples, and discuss applications to fluvial erosion on Titan.
... This creates major air and water pollution problems from abrasive residue as well as paint and anti-foulant residues. ... Abrasive Blast Pot Equipment ...
... funded research, testing and training programs; updated ... abrasion and chemical resistance as well as ... However, its water absorption and adhesive ...
In jobs for United Texas Transmission Co. and Natural Gas Pipeline Co. of America, a proprietary system of high-pressure water jet blasting for cleaning and air abrasive or mechanical-wheel blasting for surface preparation increased productivity and decreased time required for long-line pipelines rehabilitation projects. This second of ...
; abrasions; concussions; contusions; strains; sprains; dislocations; fractures; cold and heat injuries; water
Improved lapping slurries provide for easier and more thorough cleaning of alumina workpieces, as well as inhibit corrosion of the lapping table and provide for easier cleaning of the lapping equipment. The unthickened lapping slurry comprises abrasive grains such as diamond abrasive dispersed in a carrier comprising water, glycerine, ...
Improved lapping slurries provide for easier and more thorough cleaning of alumina work pieces, as well as inhibit corrosion of the lapping table and provide for easier cleaning of the lapping equipment. The unthickened lapping slurry comprises abrasive grains such as diamond abrasive dispersed in a carrier comprising water, glycerine, ...
DOEpatents
... WATER JET WITH A CHEMICAL ... The procedure is to use the water jet to break up the droplet and subsequently to carry away the contaminant. ...
NASA's Mars Exploration Rover Opportunity used its rock abrasion tool on a rock ... This observation from NASA's Mars Reconnaissance Orbiter shows fractured ...
NASA Website
The present invention relates generally to catheters and, more particularly, to controlling the movement of the catheters in acutely branching vessels without the need for stiff and abrasive guide wires or other cumbersome mechanical means.
Also on sol 1049, Opportunity performed additional diagnostic tests of the grinding motor that operates the rock abrasion tool. All signs point to a failed ...
Aug 27, 2004 ... To the right is a "brush flower" of circles produced by scrubbing the surface of the rock with the abrasion tool's wire brush. ...
The efficiency of rock drilling and cutting by water jets using droplets and continuous jets is discussed. (TFD)
... Title : Skin Cleaner Requiring no Addition of Water for Cleaning Therewith. ... Subject Categories : SOLVENTS, CLEANERS AND ABRASIVES. ...
Past decontamination and solvent recovery activities at the Idaho Chemical Processing Plant (ICPP) have resulted in the accumulation of 1.5 million gallons of radioactively contaminated sodium-bearing liquid waste. Future decontamination activities at the ICPP could result in the production of 5 million gallons or more of sodium-bearing waste using the current decontamination techniques of ...
... coherent, propulsive water jet, proper ... Descriptors : *TURBINES, MATHEMATICAL MODELS ... STATORS, LIQUID JETS, THESES, TURBINE ...
... Descriptors : *ROCK, *EXCAVATION, *HYDRAULIC JETS, WATER FLOW, PULSE MODULATION, JET FLOW, IMPACT TESTS, FEASIBILITY ...
This Phase 1 SBIR project addressed the feasibility of using abrasive-waterjet (AWJ) machining technology for the repair of jet engine components fabricated from composites. AWJ milling techniques were adapted to remove precise amounts of the composite ma...
High velocity fluid jets (especially non-abrasive waterjets) may be ideally suited for the size reduction of excess high explosives that are to be recycled or destroyed. The fundamental interaction mechanisms between a waterjet and its target are investig...
This study was carried out to comparatively examine abrasion which occurred as a result of brushing as well as abrasives in veneering materials used in prosthetic restorations. Twenty out of forty specimens prepared at the dimensions of 14x5x3 mm, there being ten specimens of each veneering materials, were subjected to tooth brushing with ...
The invention relates to a process that provides a water and oil-resistant, antistatic and abrasion-resistant finish for nylon fabrics. The nylon is prepared from hexamethylenediamine and adipic acid or its derivatives. The process involves applying an aq...
There is disclosed transparent, abrasion resistant coating compositions comprising a colloidal dispersion of a water insoluble dispersant in a water-alcohol solution of the partial condensate of silanol wherein the dispersant comprises metals, alloys and salts thereof.
... federally funded research, testing and training ... determine the abrasion-erosion resistance ... PARAMETERS, WATER, TEST METHODS, CONCRETE ...
... Descriptors : (*CUTTING FLUIDS, *DRILLING), (*DRILLS, LUBRICATION), STEEL, AIR, WATER, FRICTION, SURFACE ACTIVE SUBSTANCES ...
The concrete was used for repair of abrasion erosion damaged areas such as stilling basins, conduits, sluiceways, and discharge laterals in hydraulic structures. Thirteen concrete mixtures of three water cement ratios ranging from 0.40 to 0.72, each containing one of four different types of steel fibers, were tested. As is true of concrete without steel ...
An abrasive swivel assembly for providing a rotating, particle-laden fluid stream and, ultimately, a rotating particle-laden fluid jet is disclosed herein. This assembly includes a tubular arrangement for providing a particle-free stream of fluid, a swivel assembly for rotating a section of the tubular arrangement, and a tubular end section for introducing ...
An abrasive swivel assembly for providing a rotating, particle-laden fluid stream and, ultimately, a rotating particle-laden fluid jet is disclosed herein. This assembly includes a tubular arrangement for providing a particle-free stream of fluid, means for rotating a section of the tubular arrangement, and means for introducing solid particles into the ...
DOE Information Bridge
... Task B tests were conducted with water pressures of 20, 30, 40, or 70 psi at the water jet, with the water jet positioned either straight or tilted. ...
Dynamic photoelastic and high-speed photographic techniques are used to investigate the phenomena related to fracture in brittle materials by water jet. Two water jet devices were used. A continuous water jet producing jet velocities up to 230/ms was ...
Abrasive blasting techniques are being developed for canister decontamination. Abrasive blasting with a slurry of frit followed by rinsing with high pressure water is the present reference process. The present reference process was reevaluated, because of equipment design concerns due to the abrasiveness of the ...
This volume introduces the growth of a new industry and the need for testing. Papers cover four major areas of concern: 1. Materials; 2. Process (Fuel) Slurries; 3. Applications; 4. Test Methods. The topics covered are: abrasive wear under wet sliding conditions; four coatings tested for abrasion and erosion performance in silica sand and in Alundum ...
... specimens were placed in a rotary tumbler with abrasive grit and water and tumbled for several days. ... but lacking septa, in a rotary tumbler with abrasive grit (Fig.�10.2�10.4). After 120� ... ...
NBII National Biological Information Infrastructure
Wet blast cleaning of steel surfaces results in flash rusting and to combat this problem, water soluble inhibitors are used. It was suggested that inhibitors could be improved and to investigate this problem, it was necessary to produce abrasive blast cle...
The Bureau of Reclamation's Water Resources Research Laboratory conducted a 1:50-scale model study of the Folsom Dam service spillway and stilling basin. The purpose of the study was to evaluate flow conditions contributing to abrasion damage in the still...
An acoustic oral hygiene unit that uses acoustic energy to oscillate mild abrasive particles in a water suspension which is then directed in a low pressure stream onto the teeth is described. The oscillating abrasives scrub the teeth clean removing food p...
... How- the water jet-equipped model draghead in- ever, hopper dredges have experienced vari- ... Task A Shop-Fabricated Water Jet Tests ...
... 80196 TWO PHASE WATER JET PROPULSION FOR HIGH-SPEED VEHICLES ... apparatus, and more particularly.to a two phase water jet ...
Water Jet Concept. 141. 43. Water Jet Cleaner Support Shaft ...... a) Water Jet: When the cleaning process is initiated, swivel ...
On April 14, 2010, when meltwaters from the Eyjafjallaj�kull glacier mixed with hot magma, an explosive eruption sent unusually fine-grained ash into the jet stream. It quickly dispersed over Europe. Previous airplane encounters with ash resulted in sandblasted windows and particles melted inside jet engines, causing them to fail. Therefore, air traffic ...
In this study, we investigated the role of water spray. To ablate human enamel tissue, a long-pulsed Er,Cr:YSGG laser was used at various radiant exposures. During dental ablation, distilled water was sprayed to the sample surface. Desiccated samples were also tested with direct irradiation for comparison. In order to identify dominant ablation mechanisms, ...
