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Articles tagged with "water"
Results: 56
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What to know before selecting a manual plasma cutter: Understanding size, power, components, costThe first plasma arc cutting (PAC) systems, developed in the '60s, were 1,000-amp monsters designed to blast through 6-inch stainless steel.
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Making hands-free straight, saddle, and miter cutsRovanco Piping Systems Inc. designs and fabricates piping systems for applications such as water (hot and cold), steam, and jet fuel. It sells fabricated pipe—typically with straight or miter end cuts—up to 36 inches in diameter. It provides preinsulated, high-temperature, low-temperature, and containment systems.
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Not your father's abrasive jet: Technological advances, attention to common woes give fabricators options for precision cuttingThe advances made in abrasive jet cutting in recent years have negated much of the downside formerly associated with the technology.
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Exploring complementary cutting methods: Comparing capabilities of laser, plasma, EDM to waterjet technologyThe various cutting methods available to fabrication shops today can be both a little daunting and very beneficial. Choice is good--learn how to make the most of the diversity all your choices offer to you.
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Selecting a table for abrasive jet machining |
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Advancements in waterjet technologyWhen Jack Budd, president of Precision Waterjet, Orange, Calif., purchased his first waterjet system seven years ago, he expected most of the company's work to come from the aerospace industry, which was robust at the time. When business from that industry tapered off, he searched for new customers in the architectural, signage, and automotive aftermarket industries.
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Abrasive control factors for mass finishing systems: Understanding the performance characteristics of various mediaThe article circulates around the different media styles for mass finishing systems, discussing the cost, weight, and ability of each style. The styles discussed are divided into several areas: Random versus preform shapes; ceramic versus plastic; spherical shapes versus angular shapes versus hybrids; and dry finishing options versus wet options.
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The evolution of coatings with low levels of volatile organic compounds: Where the industry stands in its quest for zero VOCA lot of advancements have been made in liquid coatings over the past 30 years toward the ultimate goal of zero-volatile-organic-compound paints. Anyone having to meet environmental regulations could benefit from knowing what has been done and what is brewing in the industry.
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Using hydroforming aluminum components versus steel stampings: The contender gains points, but the champion is still in the fightThis article examines two transitions that are occurring in the automotive industry—the change from stamping to hydroforming, and the substitution of aluminum where steel was used previously.
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Pressure-sequence and high-pressure hydroforming: Knowing the processes can mean boosting profitsPressure-sequence hydroforming can form complex parts as well as forming most ductile metals, including high-strength, low-alloy, and stainless steels with sharper corners, thick-walled tube, and other difficult features.
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Handling metal stamping wastes: Protecting the environment - - and your businessMetal stamping companies are required to comply with a number of regulations relating to the collection, transport, treatment, and disposal of the wastes they generate. As a result, each company must learn which materials are classfied as hazardous and how to comply with detailed regulations.
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Interaction of chemicals used in forming and fabricatingKnowing how chemicals tend to react with one another and how each type of lubricant and coolant commonly used during steel processing tends to behave is a boon when you're trying to fabricate products properly.
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Mixed Metals Reactions: Danger in the ductworkUnder controlled conditions, aluminum and steel powders can be mixed to create a chemical reaction to produce heat for welding. If you mix these materials under uncontrolled conditions, you will want to call the fire department.
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Predicting the service life of galvanized steelZinc, which has been used to hot-dip-galvanize steel for 250 years, provides 50 to 75 years of corrosion protection in many environments. Empirical data collected about hot-dip galvanized (HDG) steel field performance from 1940 to 1980—in environments ranging from industrial to marine to suburban—indicates that zinc can prevent base steel corrosion more than other surface treatments. Because of zinc's long-lasting protection, projects require no maintenance and therefore no maintenance costs.
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Phases, structures, and the influences of temperatureWhen you heat or cool a piece of metal to a specific temperature, that metal goes through what's called a phase change, in which its crystal structure changes. Sometimes the change is obvious. For example, when a piece of metal melts, it goes through a phase change when the crystal structure breaks down and the metal goes from solid to liquid. When it solidifies it's also a phase change, as the structure re-forms from liquid to solid.
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Combating plate corrosion: Improving corrosion resistance through welding, fabrication methods |
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Mill coolant system design: Lubrication is more than meets the eyeWhat kind of coolant system you construct for your tube mill or roll forming operation is just as important as what type of coolant you use.
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Selecting the right materials for roll forming—Part 2: How mechanical properties affect productionThis is the second part of a two-part article. Read Part I. If you examine the mechanical properties of several materials, including carbon steel, alloyed steel, stainless steel, as they relate to roll forming, you'll gain an understanding of the influence of some primary metal processes on roll forming.
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Thermal spray safety and OSHA compliance: Protecting operators from ultraviolet light, fumes, dust, compressed air, gasesOSHA has regulations for both facets of thermal spray environment, and shops should be aware of some practical safety tips for how to comply with those regulations.
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Stamp of Approval: Full-court press safety: How to maintain an effective safety program end to endIf you want a safe press operation, look beyond the machinery. Don't be surprised to find the keys to a good safety program well outside the confines of the pressroom.
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Staying safe during HF welding: A common sense approach to personnel protectionProper clothing, training, procedures, troubleshooting, preparation, and equipment for HF welding are critical if you want to prevent workplace accidents.
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Defibrillators—Should you have one in your workplace?This article explores the facts about AEDs, the legalities surrounding their use by laypersons, and guidelines for implementing an AED program in the workplace.
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Take control of safetyWelders are among the millions of workers who face respiratory hazards every day in the workplace. Confined spaces, solvents, and gas emissions, as well as welding, grinding, and soldering, may expose workers to airborne hazards.
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One system does not fit all: Ventilation equipment becomes more specific to improve the welding environmentVentilation systems come in a variety of types for different types of welding processes and varying fabrication facility setups. The emphasis on proper application of these systems and best use of the components used in them comes from an increased interest in cleaner air for the welder.
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Occupational injury and illness statistics: Where does your manufacturing job rank?In December 2003 the U.S. Department of Labor's Bureau of Labor Statistics (BLS) released its 2002 occupational injuries and illnesses data. A total of 4.7 million nonfatal injuries and illnesses were reported in private-industry workplaces during 2002, resulting in a rate of 5.3 cases per 100 equivalent full-time workers. Among goods-producing categories, incidence rates ranged from 4.0 cases per 100 workers in mining to 7.2 cases per 100 workers in manufacturing. These numbers are overall averages of subsets in each major category.
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Keep it clean: Selecting the right waste treatment optionAre you having problems with wastewater discharges from your metalworking facility? Have you received a violation notice from your sewer use authority? Do your environmental experts speak a language you don't understand or continually reject new fluids you would like to use? Or perhaps you would like to use new or improved lubricants, cleaners, rust preventives, or detergents, but the products you've tried have failed the waste treatment tests.
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Sick at Work?All employees have days at work when they don't feel well. Usually these days are intermittent and can be attributed to a cold or other illness or job-related stress.
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Meeting ISO 14001 requirements: Leveraging advanced forming lubricant technologyAs of July 2003 all 5,000-plus Ford Motor Company suppliers were required to be ISO 14001-certified. In 2002 General Motors required all of its suppliers to implement environmental management systems (EMS) that conform to ISO 14001. The trend will continue for the auto industry and others.
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Tips on Lean Manufacturing: Mastering the stop 'n' go of your shop's work flowMastering the flow of work through your shop is your most important taks if you are attempting Toyota's approach to lean manufacturing.
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Installing and maintaining coil cradles and reelsThe installation procedures that can help to prolong the life of coil cradles and reels are outlined in this article. Specific steps to maintain cradles and reels are also included.
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Appliance industry takes a shine to powder blank technologyAmong European, Pacific Rim, and U.S. appliance makers and other manufacturers with large-scale, appliance-grade finishing requirements, the use of powder blank line coating systems has grown steadily during the past 10 years.
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Spraying it right: Containing and controlling lubricants |
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Rising expectations spark new approach to draw die development: Reconciling demands for increased quality at lower costsA recently formulated approach to draw die development incorporates simultaneous engineering to identify and address potential problems before dies are built.
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Batter up! Turning an aluminum tube into a baseball batThe roar of the crowd, the shouts of the umpire, the crack of the bat hitting the ball—these are the unmistakable sounds of a baseball game. Over the last few decades, however, one of those sounds has changed; now the bat tends to make a ping that resonates when it hits the ball. It's the sound of aluminum rather than wood making contact with the ball.
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Getting a handle on work-related hand injuriesThe hand is one of the most complex parts of your body. It enables you to execute simple or complex jobs that cannot be performed by any other part of the body. Without your hands, it would be extremely difficult to do even those routine tasks that we take for granted every day.
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Taking tubular aluminum scaffolding to new heights: Taper, aesthetics, elevated design for monumental structureFor the company that broke the world record for building the tallest freestanding structure with a 320-foot scaffolding (the Statue of Liberty restoration project in 1984, see Sidebarat bottom of page)designing and constructing the scaffolding for the Washington Monument restoration project was just a natural next step.
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Maintaining and troubleshooting HF welders: A common-sense approach for vacuum tube and solid-state machinesThe basic steps of general preventive maintenance and troubleshooting for both vacuum tube and solid-state high frequency (HF) welders should assist in keeping welders online and producing pipe or tube.
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Making seamless tubing with a floating mandrel mill |
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Do your tubes seam good enough? Using eddy current testing to make sureEddy current testing offers several features that makers of welded tube may find to their liking—in particular, high throughput speeds and sensitive flaw detection.
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Solving the mysteries of the fin pass—Part 2Editor's Note: This article is the second part of a two-part series about fin passes. Part I, which appeared in the March issue, discussed their location, what they do, and how they do it. Part II focuses on troubleshooting.
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Managing environmental risk in tube, pipe production: What you need to know about state and federal regulations |
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Al GMAW: CC or CV?For about 40 years, a great debate in welding is whether to use constant-current or constant-voltage power supplies when using gas metal arc welding on aluminum. Constant-current power supplies made sense 30 years ago and are still used in some applications today, but for most applications, constant-voltage power supplies are suitable for gas metal arc welding aluminum.
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Advantages of plasma welding: Often-overlooked PAW offers speed and affordabilityPlasma arc welding sometimes offers greater welding speed than gas tungsten arc welding at lower cost than laser beam welding.
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Secrets of Using GTAW for Tools and Dies: One retired fabricator share the basics of how he added this services to his shopTool and die welding can be a very lucrative service for a fab shop. However, tool and die welders are about as rare as brain surgeons because of a general lack of knowledge about the process and because of the extra expense it brings to a shop. This article offers a basic understanding of what's needed to add this service to your fab shop.
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Gun Control: GTAW torch design innovations enhance productivity, qualityThis article discusses improvements to the GTAW torch that should enhance the productivity and quality of welding operations. It specifically discusses the welding gun's affect on ergonomics and cooling capacity.
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Remote GTAW of spent fuel canisters: How this process reduces operator exposure to radiationThis off-the-beaten-path article defines a remote GTAW process that allows weld operators to minimize their exposure to radiation when welding spent fuel canisters used to contain nuclear fuel.
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Joining aluminum with GTAW: Advice for the noviceAluminum is a real challenge to weld, especially for beginners. A knowledge of the gas tungsten arc welding equipment that is available to do the job as well as required accessories, preparation tips, and proper techniques is a good thing to have before jumping in.
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It happens 'under the hood': Chicago-area builder of water gardens becomes sculptorRick Walsh isn't your typical artisan, nor are his works typical welding pieces. But his personal evolution as both an artist and a welder illustrate the innovation and persistence of any successful welding operation.
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Art From the Forge: Finding new sources for inspirationThose of you who are busy fulfilling commissions for gates, fences, staircases, and the myriad items that keep food on the table might want to look at artwork created by people whose backgrounds are based in the arts. Metalworkers often are so tuned to traditional designs that they are unaware of a swelling modern movement that could generate new ideas, new visions, and new clients.
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Robots and dials and knobs—oh my!: GMAW power sources have evolved over timeIn the late 1950s, the U.S. Navy wanted to find a way to join heavy aluminum structural sections used to fabricate motor torpedo boat hulls.
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Selecting the right tungsten: How your choice affects AC GTAWMost welders used to agree that a pure tungsten electrode was crucial to obtaining the best results for gas tungsten arc welding (GTAW) aluminum, magnesium, and other alloys that required an AC arc.
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Understanding weld discontinuities |
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The Brakes: Press Brakes and You -- Preventing common mistakes on press brakesMost common mistakes made while operating press brakes can be avoided with a little diligence and awareness of where others have gone astray.
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The Brakes- Press Brakes and You -- How to get the most out of your press brakeProblems with your press brake imperil what could be the most valuable machine you have. Take pains to ensure the health of this valuable piece of equipment.
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Repair Brazing: Fixing Faulty Jobs and worn-out componentsBrazing has myriad uses for shop repairs. Knowing what seperates a proper brazing job from a poop one can save you alot of headaches and produce some slick results in the process.
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Turning up the power: Using lasers to cut thick plateThe most common power levels ranged between 1,500 and 2,000 watts. However, a statistical survey conducted by the AMT Laser System Product Group indicates a steady increase during the last 12 months of installations for high-power 3,000- to 4,000-watt laser systems and a decline in sales of lasers with power levels less than 2,000 watts.
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