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 ...

... Most nonmetals can be cut rapidly and efficiently with a waterjet. Cutting applications include paper, cloth, wood, plastics, fiberglass, and rocks of ...

... Table 2. Abrasives Used in Abrasive Waterjet Cutting. Adapted from reference 13. 500 - I Abrasive I Knoop Hardness 1 ...

... Testing performed by Alliant Techsystems with abrasives aspirated into the fluid stream, known as abrasive waterjets, have cut almost 200,000 ...

... performed into the mechanisms of spark formation, explosive initiation, and waterjet cutting process has shown that these sparks are benign when ...

... Title : Monitoring of Thermal Energy Distribution in Abrasive Waterjet Cutting Using Infrared Thermography. Descriptive Note : Journal article,. ...

This report presents an overview of the use of water-abrasive jets for cutting. Specific references to industrial uses are given.

Waterjets are coherent streams of high-velocity water that can be used to cut soft materials. Abrasive waterjets have fine abrasive particles entrained in the waterjet and serve as a unique tool for machining very hard tough, or brittle materials. The obj...

Sparks have been frequently noted in the process of abrasive waterjet cutting of explosive ordnance. These sparks have not, however, caused an ignition event in the nearly 200,000 items cut to date. Research performed into the mechanisms of spark formatio...

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...

This paper reviews the history of development of waterjet drilling and cutting technology and its applications to both coal and hardrock mining situations. It discusses the performance and design of various waterjet drills and the required water pressure used to drill a hole. The majority of the paper describes the development of ...

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 f...

... and spade drills, diamond plated twist and core drills, and the abrasive waterjet hole cutting process were evaluated for drilling aluminum metal ...

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 ...

An experimental study of abrasive waterjet (AWJ) cutting of beef, pork and lamb meat with and without bone is presented. Salt particles were used as the abrasives. It has been found that an AWJ could significantly increase the depth of cut with much improved cut quality in ...

This book describes a machining technique called Waterjet cutting, also referred to as hydrodynamic machining. It is an advanced technology cutting tool that uses a stream of ultrahigh-pressure water forced through a sapphire nozzle. The waterjet removes workpiece material and produces a narrow kerf by the ...

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 investigated for the purpose of assessing the safety of waterjet ...

The use of abrasive waterjet (AWJ) cutting systems in the industrial sector has been limited to applications that are difficult to machine using conventional methods. A major factor for this limited use is the high cost of the garnet abrasive currently us...

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 ...

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 ...

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...

... used to transport abrasives from a hopper to the nozzle abrasive chamber via a suction hose. A typical abrasive material ...

The objective of this project was to develop the functional requirements and conceptual design for the next generation abrasive waterjet machining center. This system will elevate the machining capabilities of the abrasive waterjet process to those of con...

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.

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,...

Polycrystalline diamond (PCD) tipped twist and spade drills, diamond plated twist and core drills, and the abrasive waterjet hole cutting process were evaluated for drilling aluminum metal matrix composites reinforced with SiC fibers or particulates. The ...

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.

Two concrete-cutting technologies utilizing high-pressure waterjets have been investigated to assess their feasibility in achieving rapid cutting rates (30 sq ft/min) to facilitate bomb damage repair to runways. The current cutting rate of abrasive waterj...

A new technique to fabricate ultra-lightweight glass mirrors using high-velocity abrasive-waterjets (AWJs) is proposed for the milling of pockets in glass ...

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 ...

... Accession Number : ADD802298. Title : Introduction to Waterjet Cutting Technology. Descriptive Note : Conference paper,. Corporate Author : ...

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 ...

The use of abrasive waterjet (AWJ) cutting systems in the industrial sector has been limited to applications that are difficult to machine using conventional methods. A major factor for this limited use is the high cost of the garnet abrasive currently used. Initial studies indicated that glass can be processed to ...

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 ...

Different cuts and constraints associated with abrasive waterjet machining of metal-matrix components are discussed, as well as cutting parameters for aluminum and titanium fiber composites. Three types of metal-matrix composite machining are identified: test-coupon machining involving axial and transverse samples, ...

Construction of a second theater underground at the Gateway Arch in St. Louis required a quiet, non-intrusive means of rock removal, capable of cutting the vertical walls of the theater down to a depth of 4.5 meters, within a vertical accuracy of 2.5 cm. A low pressure (35 MPa) abrasive laden waterjet was developed for this; and, also ...

Heiniger, W�lti: Novel Single Crystal Diamonds for Waterjet Cutting Applications Novel Single Crystal Diamonds for Waterjet Cutting Applications K.C. Heiniger * University of Applied Sciences. 3, CH-2560 Nidau, Switzerland In waterjet cutting, orifices from hard materials ...

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 ...

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 ...

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...

Basic machining processes are introduced on this site that is devoted to engineering fundamentals. Descriptions and illustrations of drilling, turning, grinding, and other common processes are provided for people with little to no prior machining knowledge. A waterjet is a non-traditional machining technology that uses high pressure streams of water with ...

An engineering prototype multipurpose construction and maintenance vehicle (MCMV) was developed for gas utilities to service distribution systems buried under pavement. The vehicle incorporates an abrasive waterjet to cut pavement, a vacuum bell to lift i...

The last 25 years has seen a dramatic growth in the use of high pressure waterjets for cleaning purposes. Throughout recorded history and no doubt for a long time before that, the dual role of water as both a solvent and a lubricant has been one of the major ways of washing surfaces down regardless of what the surface was. Also, the power built into a ...

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 ...

An experimental investigation was conducted to determine the feasibility of machining isogrid structures with abrasive-waterjets (AWJs). The main objective was to mill isogrid patterns in surfaces with accurate depth control using an AWJ. Three different ...

... Accession Number : ADA214952. Title : High Pressure Waterjet Cutting Industrial Needs Survey. Descriptive Note : Final rept. Oct 1988-Sep 1989. ...

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 designed for use at great water depths and ...

This set of tutorials and practice problems on manufacturing engineering is part of a larger collection of materials in the Engineer on a Disk series. Topics in the Manufacturing section include: 2. BASIC MANUFACTURING 3. MANUFACTURING COST ESTIMATING 4. BASIC CUTTING TOOLS 5. CUTTING THEORY 6. SAWS 7. DRILLING 8. LATHES 9. MILLING 10. GRINDING 11. ...

The purpose of this investigation was to simulate a machining front from an abrasive waterjet and its movements in a ceramic material. Wear factors affecting the abrasive waterjet nozzle were also to be established. Therefore, a low inclination angle (9[degree]) was used between the nozzle and test sample, ...

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...

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 ...

An experimental investigation was conducted to determine the feasibility of machining isogrid structures with abrasive-waterjets (AWJs). The main objective was to mill isogrid patterns in surfaces with accurate depth control using an AWJ. Three different approaches using AWJs were tested: linear cutting of isogrid patterns for diffusion bonding, milling ...

Basic machining processes are introduced on a Web site that is devoted to engineering fundamentals (1). Descriptions and illustrations of drilling, turning, grinding, and other common processes are provided for people with little to no prior machining knowledge. A waterjet is a non-traditional machining technology that uses high pressure streams of water with ...

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 a non contact ...

... Title : Development of an Abrasive Water Jet Optimum Abrasive Flow Rate Model for Titanium Alloy Cutting (Preprint). Descriptive ...

Cutting edge waterjet innovations are the subject of this February 2003 feature from Forming & Fabricating, a publication of the Society of Manufacturing Engineers. Extremely high pressure nozzles are being developed to improve cutting speed and lowering costs, and enhanced software for controlling machine movements is also a focus ...

... in the report were obtained using abrasive water jet cutting equipment and ... the speed quoted being the fastest recorded to completely cut the full ...

... 3. Abrasives are not affected by variations of surface quality whereas cutting tools need extra ... 4. Interrupted cuts do not affect abrasive machining. ...

... fibers. Center hole notches were machined into specimens using conventional machining, laser drilling, or waterjet cutting. ...

On March 28, 1979, the Pennsylvania Three Mile Island nuclear power plant Unit 2 (TMI-2) suffered a partial fuel-melt accident. During this accident, over 20,000 lb of molten fuel flowed through holes melted through the baffle plates and through the lower-core support assembly (LCSA). The molten fuel subsequently resolidified in the bottom of the reactor vessel. The lower-core support assembly of ...

... technology. The waterjet-assisted mechanical cutting technology, however, has not been developed as a concrete cutting system. ...

Sandia National Laboratories (SNL) is tasked to support the Department of Energy in the dismantlement and disposal of SNL designed weapon components. These components are sealed in a potting compound, and contain heavy metals, explosive, radioactive, and toxic materials in discrete sub-components. SNL developed and demonstrated a process to identify and remove the hazardous sub-components ...

Sandia National Laboratories (SNL) is tasked to support The Department of Energy in the dismantlement and disposal of SNL designed weapon components. These components are sealed in a potting compound, and contain heavy metals, explosive, radioactive, and toxic materials. SNL developed a process to identify and remove the hazardous sub-components utilizing real-time radiography and ...

An engineering prototype multipurpose construction and maintenance vehicle (MCMV) was developed for gas utilities to service distribution systems buried under pavement. The vehicle incorporates an abrasive waterjet to cut pavement, a vacuum bell to lift it out, a soft excavation tool to dig without utility damage and a soil stabilizer ...

Upon successful termination of preliminary investigations into the suitability of high pressure waterjets for cutting coal, Gewerkschaft Eisenhuette Westfalia, Luenen, and M.A.N.-GHH Sterkrade designed almost simultaneously, though independently, appertai...

CNC water-jet machining was investigated to determine the potential applications and cost-effectiveness that would result by establishing this capability in the engineering shops of Allied-Signal Inc., Kansas City Division (KCD). Both conductive and nonco...

A cutting waterjet to produce corneal flaps during refractive surgery or to slice donor corneas for corneal grafting was developed. Jets generated with several different nozzles were compared to determine the most appropriate nozzle geometry for this application. In this paper, it is also discussed how other variables, such as stand-off distance and ...

... Title : The Effect of Abrasion Resistance and Thermal Properties of the Cemented Carbide Cutting Tool Grade on the Flank Wear Characteristics. ...

... Abstract : A lubricating and cooling fluid for the abrasive working of metals ... Descriptors : *GRINDING, *CUTTING FLUIDS, USSR, CORROSION ...

... with wet abrasives for cutting. ... The edges of the brass cylinder were slotted to facilitate abrasive action and removal of glass particles. ...

This paper addresses an experimental investigation on the feasibility of using abrasive-waterjets (AWJs) for the precision drilling of small-diameter holes in advanced aircraft engine components. These components are sprayed with ceramic thermal barrier coating (TBC), and the required holes are typically 0.025 in. in diameter with a drilling angle of 25 deg. The parameters of ...

This paper addresses an experimental investigation on the feasibility of using abrasive-waterjets (AWJs) for the precision drilling of small-diameter holes in advanced aircraft engine components. These components are sprayed with ceramic thermal barrier coating (TBC), and the required holes are typically 0.025 inch in diameter, with a drilling angle of 25 deg. The parameters ...

Waterjet guided laser processing is a new technique. The process combines the advantages of laser processing with those of waterjet cutting. The technique based on guiding a laser beam inside a thin, highspeed waterjet. It is very suitable in processing thin and sensitive material with a high degree of precision ...

... Title : Water Jet and Abrasive Water Jet Cutting of Unidirectional Graphite/Epoxy Composite. Descriptive Note : Journal article,. ...

... materials (EM) and energetic material contaminated wastes ... waterjets to cut energetic materials was evaluated ... is a "batch reactor" which employs a ...

... Cable survivability, Cable protection, Cable shore landings, Ice scour, Horizontal drilling, Waterjet cutting, Well logging, Pipe joints. ...

... lends itself to CNC control and robotic manipulation ... tion on WJC, similar to that available on feeds and speeds for lathe operations. Until this type ...

... Data system chassis development, fabrication; Large scale wind tunnel model development; Aircraft Loadmaster trained and qualified; Water-Jet cutting ...

... CA*. Personal Author(s) : Howarth, Steven G. ; Strong, AB. Report Date : 05 APR 1990. Pagination or Media Count : 14. Abstract ...

Various methods have been explored for the fabrication of the large trapezoidal plates used in the construction of the Tile-Cal hadronic calorimeter for ATLAS. The options include die stamping, laser cutting, waterjet cutting, plasma arc cutting, and a co...

Over the next decade, the US Department of Energy (DOE) must retire and dismantle many nuclear weapon systems. In support of this effort, Sandia National Laboratories (SNL) has developed the Hazard Separation System (HSS). The HSS combines abrasive waterjet cutting technology and real-time radiography. Using the HSS, operators ...

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...

Waterjet-assisted cutting is discussed as a method of bringing improvements in bit life, productivity, and health and safety to mining machines. The cutter closest to commercial production, called the JB2-H Jetbolter, is examined and its on-site modifications are described. The system is designed for water to do 85% of the work. The Jetbolter is designed ...

... surfaces. Descriptors : (*CUTTING, FRICTION), CUTTING FLUIDS, ABRASIVES, FORCE(MECHANICS), STEEL, USSR. Subject ...

... It is also used topically as a local antiseptic for cuts and abrasions, for burns, insect bites ...

An in-seam tester, which is a hydraulically activated single-pick instrument to measure and record pick cutting forces, was designed and fabricated to establish criteria necessary for the design and development of a water-jet-assisted rotary drum cutting system using moderate-pressure jets (3000 to 10,000 psi). Data are presented for ...

A new mining machine is constructed for use in room and pillar mining operations. This machine uses the action of computer controlled, centrally located high pressure cutting lances to cut deep slots in a coal face. These slots stress relieve the coal ahe...

... The low-pressure water jets were able to cut a 6-in. ... per hour). The relatively high-pressure water jet cut at rates of 9.6 ft. ...

Feb 27, 2004 ... The Honeybee Robotics team, which designed and operates the rock abrasion tool, determined the depth of the cut at "McKittrick" to be 4.4 ...

A simple device is described which enables the cutting of intricate parts from glass, alumina, etc. using abrasive cutting techniques. (Author)

A study was conducted to determine the feasibility of using high-pressure waterjets for coring for geothermal coring and drilling. The study examined the effects of confining pressure, borehole pressure, and temperature on jet cutting ability. Additionally, a study was made to determine the requirements of a high-pressure drilling system and the ...

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...

Water-assisted mining machinery is beginning to be considered in the US, although it has been in use in Europe for some time. A waterjet roof bolter is currently under test and should greatly increase drilling rate with longer bit life and no dust. Water-assisted roadheaders and longwall winning machines under development in Europe and the US are described.

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 modern industrial cutting technique.. Numerical simulations of the abrasive

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...

The cutting and scratching of metal surfaces by abrasives in the presence of lubricating and cooling liquids is considered. The forces involved in these processing are considerably affected by seizing or 'snatching' effects between the contigous materials...

... Diamond abrasive machining is necessarily and extensively used in the ceramics industry, but there are many limitations to its use. ...

... Descriptors : (*CUTTING FLUIDS, *DRILLING), (*DRILLS, LUBRICATION), STEEL, AIR, WATER, FRICTION, SURFACE ACTIVE SUBSTANCES ...

... Title : Lasers Machine Hybrid Laminates. ... technologies in these materials are lasers and abrasive ... as widely used in industry as laser cutting, which ...

... cut tubing is a good hose chafe guard ... Descriptors : *HELICOPTERS, *HOSES, ABRASION, HYDRAULIC EQUIPMENT, PROTECTIVE COATINGS ...

This is a hookworm egg. Hookworms hatch in damp vegetation. Their larvae can enter the human body through the skin, even without cuts or abrasions. ...

... Parents For College Students MORE ON THIS TOPIC Cellulitis Taking Care of Your Skin What's a Scab? ...

... Accession Number : ADD258347. Title : Application of Silicon Carbide Fibers for Increasing the Service Parameters of Abrasive Cutting Wheels. ...

The Husky(trademark) is an ultra high pressure waterjet cutting tool system. The pump is mounted on a steel tube frame which includes slots for transport by a forklift. The Husky(trademark) features an automatic shutdown for several conditions such as low...

The author reviews developments in face-end machinery in the UK, West Germany and US. Automatic control systems such as MIDAS and MINOS are considered, as well as water-jet assisted cutting and machine health monitoring.

Conventional mining of coal on longwall faces, is largely by use of the shearer-loader cutting system. In this type of mining, closely allied in concept to the continuous miner of room and pillar mining, the coal is, virtually exclusively, extracted by th...

Results are described of a design study investigating the feasiblity of using high-pressure water-jet cutting in the continuous mining of coal in underground mines. The potential advantages of this approach include the reduction of dust and sparking hazar...

Results are described of a design study investigating the feasibility of using high-pressure water-jet cutting in continuous mining of coal in underground mines. In the report, a design concept is developed in which eight water jets would be mounted on a ...

for treatment of liver cancer, trans- parent composites for windows/armor, environmentally friendly corrision to be encompassed within the laboratory in- clude the areas of waterjet cutting, surface preparation of concrete and detection, rock penetration and disintegra- tion for rapid excavation, coal mine roof stability, concrete

Low-cost, portable machine cuts ducts made from heat-treated alloys. An abrasive wheel, powered by a

... Title : A Comparison Between CO2 Laser Cutting and Competitive Techniques (Nd:YAG Laser, Plasma Arc, Abrasive Water Jet and Oxygen Flame ...

The water-jet method has been used during hepatic resection in children. The instrument cuts the hepatic tissue by means of a high-pressure fine water-jet, while the exposed intrahepatic vessels are spared injury. Physiological saline was used for the jet water, and pressure of 12 to 15 kilograms of force per square centimeter ...

CNC water-jet machining was investigated to determine the potential applications and cost-effectiveness that would result by establishing this capability in the engineering shops of Allied-Signal Inc., Kansas City Division (KCD). Both conductive and nonconductive samples were machined at KCD on conventional machining equipment (a three-axis conversational programmed mill and a ...

Computer Numerical Control (CNC) water-jet machining was investigated to determine the potential applications and cost-effectiveness that would result by establishing this capability in the engineering shops of Allied-Signal Inc., Kansas City Division (KCD). Both conductive and nonconductive samples were machined at KCD on conventional machining equipment (a three-axis ...

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 surface, phenomena of ...

A method for fabricating a tool used in cutting, grinding and machining operations, is provided. The method is used to deposit a mixture comprising an abrasive material and a bonding material on a tool surface. The materials are propelled toward the receiving surface of the tool substrate using a thermal spray process. The thermal spray process melts the ...

Abrasive cut-off wheels are at times unintentionally manufactured with nonuniformity that is difficult to identify and sufficiently characterize without time-consuming, destructive examination. One particular nonuniformity is a density variation condition...

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 abrasive water jet (AWJ) machining

... of the specimen by means of the air-abrasive technique reveals the animal's head in right ... of most are incompletely exposed even after air-abrasive preparation. The smallest teeth are directly on the ...

...rays, hot metal, or sparks from welding or cutting. (d) Abrasive blasting and spray painting. Longshoring operations shall not be carried on in the immediate vicinity of abrasive blasting or spray painting operations. (e) Machine...

A water jet process has been developed to reduce hemispherical explosive shells to a form that can be recycled. A funnel shaped wet box was modified to hold the shells in place and contain all the explosive chips and slurry generated by the waterjet process. Size reduction was accomplished by cutting in spiral patterns starting at the center of the shell ...

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...

Experimental two-body abrasion test equipment was developed to study the effects of temperature and liquid environments on abrasion. The effect of various liquids was determined for AISI 1018 Steel and 1100 Al. The effect of temperature on abrasion was determined for 1100 Al and Cu. An explanation based on adiabatic shear observed in ...

In order to widen the application range of mechanized tunnelling in the rock for application in hard-coal mining, less clumsy heading systems need to be developed. For this purpose industrial-scale tests are run on the test rigs of Bergbau-Forschung as well as on one colliery. For these tests a road profile cutting machine equipped with various sensors and with a high-pressure ...

Flexible hoses with rated working pressures up to 40,000 psi are used when high-pressure water jets are employed to cut rock or improve the performance of mining machines. Hose failures at such high pressure can result in serious injuries to workers. The ...

The response to thermal cycling of a set of W-1% ThO{sub 2} reinforced Fe-25Cr-8Al-.50Y superalloy matrix composites was studied. During this research, unique composite materials were produced by powder-metallurgical processing. These materials were three aligned composites of differing reinforcement aspect ratio, and a hierarchic composite that included fine-diameter Al{sub 2}O{sub 3} fibers. ...

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 roughness and the micromechanisms of material removal for both ...

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 ...

A remotely operable, portable cutting apparatus detachably secured to the workpiece by laterally spaced clamp assemblies engageable with the workpiece on opposite sides of the intended line of cut. A reciprocal cutter head is mounted between the clamp assemblies and is provided with a traveling abrasive cutting ...

A remotely operable, portable cutting apparatus detachably secured to the workpiece by laterally spaced clamp assemblies engagable with the workpiece on opposite sides of the intended line of cut. A reciprocal cutter head is mounted between the clamp assemblies and is provided with a traveling abrasive cutting wire ...

... from federally funded research, testing and training ... and realization of model wear test systems closely ... mechanism on the abrasion resistance of ...

NASA STI Database, the largest collection of aeronautical ...... Fundamentals and Applications. Abrasion: Plowing and Cutting. 6. AUTHOR(S). Kazuhisa ...

Cuts, burns, and abrasions ointments. " Dishwashing products. " Erosion control materials. Floor cleaners and protecto. " rs. Hair care products ...

... Title : Machining boron-epoxy composites. ... Diamond abrasive tools are required for cutting boron-epoxy and multilayer boron-epoxy/ titanium. ...

This document identifies the hazards of using an abrasive water jet to add perforations to the salt well screen in tank 241-A-101.

Electrical wires, cables, and IJ.l'IZ|I.ES are routed to avoid abrasion, cutting or Piercing Of I118 irlllim by contact with rough surfaces or sharp ...

FIU-HCET participated in an ICT meeting at Mound during the second week of December and presented a brief videotape of the testing of the Robotic Climber technology. During this meeting, FIU-HCET proposed the TechXtract technology for possible testing at Mound and agreed to develop a five-page proposal for review by team members. FIU-HCET provided assistance to Bartlett Inc. and General ...

Conventional mining of coal on longwall faces, is largely by use of the shearer-loader cutting system. In this type of mining, closely allied in concept to the continuous miner of room and pillar mining, the coal is, virtually exclusively, extracted by the impact of mechanical cutting bits. Each unit volume of the coal is extracted in the same manner, and ...

A new mining machine is constructed for use in room and pillar mining operations. This machine uses the action of computer controlled, centrally located high pressure cutting lances to cut deep slots in a coal face. These slots stress relieve the coal ahead of the machine and outline blocks of coal. The movement forward of the machine then wedges up the ...

A new mining machine is constructed for use in room and pillar mining operations. This machine uses the action of computer controlled, centrally located high pressure cutting lances to cut deep slots in a coal face. These slots stress relieve the coal ahead of the machine and outline blocks of coal. The movement forward of the machine then wedges up the ...

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 direct supply system by ...

The many hard-facing alloy combinations are divided into 5 broad categories related to their suitability for different types of wear and service conditions: buildup of steel machinery parts and of austenitic Mn steel parts, hard-facing machinery steels, high alloys for highly abrasive conditions, tungsten carbide for extreme abrasion and ...

Abrasive waterjet (AWJ) peening is a new mechanical surface treatment process envisioned for use on metal orthopedic implants. The process utilizes an abrasive waterjet to simultaneously texture and work harden the surface of a metal substrate through controlled hydrodynamic erosion. In this study, a titanium alloy ...

AIM: To explore the feasibility of a water-jet hybrid knife to facilitate wedge hepatic resection using a natural orifice transluminal endoscopic surgery (NOTES) approach in a non-survival porcine model.METHODS: The Erbe Jet2 water-jet system allows a needleless, tissue-selective hydro-dissection with a pre-selected pressure. Using this system, wedge ...

Hydro-cutting, the use of pressurized water and abrasives to cut materials normally reserved for oxyacetylene torches, is not a new technology. Its field application as an integral part of a preengineered plant turnaround has, however, not been common. This report describes ultra high-pressure hydro-cutting ...

, cuts, scrapes, concussions, musculoskeletal injuries, heat and cold related injury and illness burns, blisters, falls, cuts, abrasions, concussions, musculoskeletal injuries, heat and cold related

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 ...

This paper discusses the potential for developing a polycrystalline diamond compact (PDC) drill bit for hard-rock applications such as geothermal drilling. It is concluded that in order to use the inherently efficient drag cutting process in such severe applications, measures must be taken to reduce cutter penetrating forces in order to prevent thermally-accelerated cutter ...

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 ...

Cause of death and job histories were obtained for 1,766 of 2,027 hourly workers with at least 5 year's exposure to cutting fluids and abrasives in the manufacture of ball bearings. Statistically significant excesses of stomach cancer existed among white ...

The authors examine the relationships between the ultrasonic machining, grain size, and wear resistance of boron and silicon carbides, candidate tool materials for cutting nitride ceramics. On the basis of mechanical tests and microscopic and fractographic analysis they recommend grain sizes of 60-100 micrometers for boron carbide and 80-100 micrometers for silicon carbide for ...

In order to widen the application range of mechanized tunnelling in the rock for application in hard-coal mining, less clumsy heading systems need to be developed. For this purpose industrial-scale tests are run on the test rigs of Bergbau-Forschung as we...

An account is given of some of the papers presented at the 1983 Rapid Excavation and Tunneling Conference, held in Chicago in June. It includes information on water-jet assisted coal cutting, freezing in shaft-sinking at a German coal mine and a vertical shaft boring machine.

The authors review the present state of development of water-jet cutting, giving information on water-jet-assisted roof bolting, rock drills and drag bits. UK National Coal Board work on a roadheader, West German design of a coal plough and US Bureau of Mines development of wethead shearers and continuous miners are considered.

The purpose of this work was to investigate abrasive blasting as a method for decontamination of radioactive Process Refabrication Experiment (PRE) in-cell equipment. Experiments were carried out, initially with nonradioactive materials, and then with low-level radioactive materials to determine the proper operating conditions and effectiveness of ...