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Content tagged with "gas"

Results: 49

Article

May 8, 2007
Arc Welding 101 - Paint tank troubles I am building a 400-gallon paint tank and I'm having trouble with leaks when using gas metal arc welding (GMAW). I'm using a welding machine running on 440. My best results come when running hot 19.5 on the heat and about 21/2 on wire speed. I am using a trimix gas and 0.035-inch 308 wire.... Read more...

Article

May 8, 2007
Arc Welding 101 I am building a 400-gallon paint tank and I'm having trouble with leaks when using gas metal arc welding (GMAW). I'm using a welding machine running on 440. My best results come when running hot 19.5 on the heat and about 21/2 on wire speed. I am using a trimix gas and 0.035-inch 308 wire.... Read more...

Article

May 9, 2006
Optimizing flow through robotic welding workcells Figure 1 One of the new CNH systems welds on a loader chassis. Veteran industrial robotic user Case New Holland (CNH), Fargo, N.D., recently installed three robotic welding systems. Each system consists of an inverted robot on a large, three-axis traveling column and two... Read more...

Article

January 11, 2005
Simplifying shielding gas selection Have you ever asked yourself any of the following questions: Why is welding affected by the shielding gases used? Why are so many blends available for carbon steel? Why can I use some gases for some materials and not others? Answering these questions will help... Read more...

Article

October 12, 2004
Site-based telemetry systems streamline gas supply Photo courtesy of TRUMPF Inc. Metal fabricators continue to find new applications for carbon dioxide (CO 2 ) lasers. New uses combined with increased just-in-time processing, and lights-out operation place greater demands on laser, assist, and process gas supply and delivery... Read more...

Article

September 14, 2004
Getting your assets in order A new 4-kilowatt laser just hit the floor. The technician will arrive on Monday to install it. It's your responsibility to make sure the gases arrive. The preinstallation manual was faxed to your local gas supplier, and all is well. Not so fast. Other gas matters can affect cost and... Read more...

Article

June 8, 2004
Selecting a shielding gas for joining stainless steel The use of stainless steel has grown significantly over the past decade in North America. As its use has grown, so has the number of different consumables required to join it. Because stainless steels are used in applications that are different from carbon steels, it follows that their... Read more...

Article

June 8, 2004
Plasma pleases plenty In case you missed it, check out this excerpt from the article "National research programs explore plate welding for shipbuilding" in the March 2004 issue of The FABRICATOR®: One project objective is to introduce laser cutting technology—which is already being used to cut sheet... Read more...

Article

March 11, 2004
Low-tech system mechanizes pipe welding: Backing device allows GMAW on open root A backing system is positioned inside a pipe and copper rings contain the weld pool. A backing device is one such type of mechanized system. Backing devices facilitate pipe alignment, proper joint gap settings, and installation of purging equipment. Furthermore, the use of backing... Read more...

Article

February 12, 2004
Selecting a stamping die pressure system, Part II Selecting a stamping die's pressure system can be a critical decision. Many questions must be answered to determine what type of pressure system best suits your application. This article is Part II of a two-part series that focuses on the different systems available, as well as the advantages... Read more...

Article

December 11, 2003
Selecting a stamping die pressure system, Part I Selecting the stamping die's pressure system can be a critical decision. Many questions must be answered to determine what type of pressure system best suits your application. Controlling Factors 1. Pressure requirements Simple conventional metal cutting dies, such as those used in blanking... Read more...

Article

December 11, 2003
Getting the best results in gas-shielded FCAW The demand for flux cored arc welding (FCAW) has grown significantly over the past 10 years. Manufacturers who weld carbon, stainless, low-alloy, and high-alloy steel are turning to this process primarily because: It has a high deposition rate. It can be used to weld in all positions... Read more...

Article

November 6, 2003
Choosing the right oxyfuel gas and supply system Photo courtesy of Weldstar Inc. Cutting In oxyfuel cutting, an oxygen jet, not the preheat flame, performs the cutting. The oxygen jet oxidizes the material and expels the heated material from the kerf. The purpose of the preheat flame is to heat the material to the ignition... Read more...

Article

October 9, 2003
Identifying the right cutting and welding tips The tip of a welding or cutting torch is where the action is (see Figure 1 ). Welding tips usually produce positive pressure (higher than 1 pound per square inch ) and are used at equal pressures of acetylene and oxygen. These single-hole copper-alloy tips are attached to a torch handle... Read more...

Article

September 25, 2003
Choosing a GMAW machine for occasional aluminum welding I want to buy a small gas metal arc welding (GMAW) machine, preferably one that runs from 120-V input power. Most of my welding will be steel, but I would like to weld aluminum occasionally. Can these machines really weld aluminum? I've heard a lot of different opinions. Some companies claim... Read more...

Article

July 24, 2003
Which wire do you require? Many fabricators overlook the efficiencies they can gain by changing a wire or process. In fact, when you ask fabricators why they're using a particular electrode, some respond with "That's the way it's always been done here," even though another way might yield significant improvement.... Read more...

Article

July 10, 2003
Hot spots for U.S. metal fabricated exports Canada is a virtual U.S. export paradise. It is, by far, the leading importer of U.S. exports in the categories reviewed by The FABRICATOR® staff. In some cases, Canada outspent the second-place export purchaser, Mexico, by 10 to 1. Some surprising newcomers have been added to... Read more...

Article

June 12, 2003
Al GMAW: CC or CV? I've read that constant-current (CC) power supplies are preferred for gas metal arc welding (GMAW) aluminum, but when I visit companies that sell welding equipment, they tell me I want a constant-voltage (CV) power supply. What's the real story? Can I use the more common CV power supplies or... Read more...

Article

June 12, 2003
Understanding weld discontinuities A welder's primary concern in any kind of work is ensuring his weld is sound. For this reason, it's important for an inspector examining the weld to be able to spot a variety of weld discontinuities, including: Porosity. Incomplete fusion. Incomplete joint penetration. Unacceptable... Read more...

Article

June 12, 2003
Loading up on quality, productivity, safety Like the products it manufactures, CNH Global N.V. has to stay on the move—technologically. The company's Wichita, Kan., facility uses robotic welding to help produce Case- and New Holland-brand skid steer loaders. Powerful yet quick, skid steers can spin on a dime and move heavy... Read more...

Article

May 29, 2003
Job shop reduces costs, improves laser's output The Laser Station regulator can be mounted to a secured surface to eliminate movement and potential leakage at the tubing connection. Such multilevel capabilities enable a customer to reduce the number of vendors it needs, thereby lowering handling and administration... Read more...

Article

May 29, 2003
Robots and dials and knobs—oh my! It has been said that necessity is the mother of invention. You be the judge. In 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. Gas tungsten arc welding (GTAW) offered suitable process... Read more...

Article

May 29, 2003
Don't be a hot dog with heating heads Welders use heating heads to preheat steels before welding, maintain heat between welds, heat treat after welding, and heat before straightening or bending. Heating heads can be safe every time they're lit when you use them safely. However, heating attachments probably are the most dangerous... Read more...

Article

May 15, 2003
Sick at Work? For some workers, various symptoms of illness appear when they enter the workplace and disappear when they leave. These workers suffer from sick building syndrome (SBS). According to the U.S. Environmental Protection Agency (EPA), SBS is used to describe situations in which building... Read more...

Article

March 27, 2003
Escape the 'Silent Killer' Like this plumber, many professionals who occasionally weld, braze, or cut metals don't wear respirators because they think infrequent exposure to fumes and gases produced by the process won't cause lasting damage. However, numerous health hazards are associated with even short exposure... Read more...

Article

October 25, 2002
Considering the benefits of pulse spray transfer GMAW Object Pulse spray gas metal arc welding (GMAW) is a versatile welding process. Sometimes welding suppliers and welding managers don't want to try it, because they don't want to change the process they're using, train users, adjust welding processes, or spend money on new equipment.While any... Read more...

Article

April 15, 2002
Targeting gas cylinders to improve safety, reduce costs As fabricators strive to increase production and control costs, new efficiencies are welcomed on the shop floor. One small item that can help improve results is the gas cylinder that is chosen. Rhodia Inc., a specialty-chemical company serving the automotive, health care, fragrance, apparel,... Read more...

Article

March 13, 2002
The challenges of laser cutting: Overcoming some common obstacles While lasers are not the answer for every application, they can provide flexibility, efficient material use, and a repeatable, controlled process. One advantage that lasers have over conventional processes such as stamping and punching is that they work with minimal contact. A typical... Read more...

Article

November 15, 2001
Gun Control: GTAW torch design innovations enhance productivity, quality Gas tungsten arc welding was developed during World War II to join hard-to-weld alloys such as zirconium, titanium, and aluminum. Later it proved to be equally successful on carbon, alloys, stainless steel, and other ferrous and nonferrous metals. Today GTAW is used heavily in the... Read more...

Article

October 11, 2001
Remote GTAW of spent fuel canisters: How this process reduces operator exposure to radiation Among many tasks that Nuclear Utilities perform is to ensure that radiation workers are exposed to the lowest possible amount of radiation. The industry has to follow strict exposure limits, and all nuclear energy workers must ensure the radiation exposure is as low as reasonably achievable... Read more...

Article

September 17, 2001
Making seamless tubing with a floating mandrel mill Every six seconds, a single, 32-foot length of oil country tubular goods (OCTG) production tubing used in the exploration and production of oil and/or gas is produced. More than 20,000 miles of tubular product a year can be produced using the floating mandrel mill seamless tubular production... Read more...

Article

September 4, 2001
Changing the way they do business Dealing with work loads, delivery schedules, and many other responsibilities doesn't leave managers with much time to consider factors that justify equipment improvements. Often this means ideas for improvements get shelved. However, fabricators who want to improve production and... Read more...

Article

September 4, 2001
Exploring complementary cutting methods Diversification is the linchpin of running a successful business. The key to producing quality work and investing in equipment wisely is knowing which cutting method—laser, plasma, electrical discharge machining, waterjet, or another—to use for a particular application. While... Read more...

Article

August 16, 2001
GMAW vs. FCAW for beginners: Choose the best process for your small operation When you prepare to buy your first wire-feed welding machine, you don't want to waste your money on a toy that goes out with the trash in a few weeks. You probably want to use 115-V input for portability, but might want to step up to a 230-V-input machine to weld thicker material. After... Read more...

Article

July 26, 2001
What to know before selecting a manual plasma cutter: Understanding size, power, components, cost The first plasma arc cutting (PAC) systems, developed in the '60s, were 1,000-amp monsters designed to blast through 6-inch stainless steel. Their mechanized torches were moved by X-Y cutting machines and powered by DC units the size of refrigerators. Surprisingly, the PAC industry... Read more...

Article

July 12, 2001
Thermal spray safety and OSHA compliance Object Thermal spray equipment normally is operated in special enclosures designed to reduce noise levels, extract fumes, and provide direct viewing of the spray nozzle when it's used in high production environments. Occasionally R&D projects, large parts, low production runs, or complex... Read more...

Article

July 12, 2001
Examining the GTAW environment Possibly the greatest development of the last decade was increased awareness of environmental and health concerns, which in the welding industry has prompted improvements in air quality, ergonomic workstations, and decreased exposure to materials deemed harmful to health. It is important... Read more...

Article

July 12, 2001
Turning up the power Industry trends indicate that metal fabricators increasingly are selecting higher-power lasers for cutting applications. Two years ago, the 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... Read more...

Article

June 15, 2001
Resisting cracking, deformation, and premature wear: Powder metallurgical steels provide an alternative to conventional tool steels Many pressworking applications require that punch and die components withstand severe loading conditions and long production runs. Under these circumstances, conventional tool steel grades such as American Iron and Steel Institute (AISI) A2, S7, or D2 may not provide the necessary compressive... Read more...

Article

May 30, 2001
Using a hand-held plasma cutter Fabricators, contractors, maintenance personnel, artists, and do-it-yourselfers who experience a hand-held air plasma arc cutting machine rarely want to return to oxyacetylene cutting or mechanical cutting processes such as saws, cutoff wheels, shears, and snips. Plasma cutting can improve... Read more...

Article

May 30, 2001
Dressing for success and other welding safety tips Whether we are attending a social occasion or dressing for the job, we all give some thought about what we are going to wear. For many social occasions, the decision is made for us, or it depends on how good we want to look. On the job, safety is more important than appearance, but again, some... Read more...

Article

May 30, 2001
Using plasma arc cutting to clean-cut stainless steel sheet and plate To cut stainless steels and other metals with plasma successfully, fabricators need the following tools: Precision machine motion controls A smooth linear drive system Software controls that automatically compensate and provide proper speed and acceleration and deceleration for... Read more...

Article

February 19, 2001
How to avoid the top 10 problems in plasma cutting: Practical tips you can use right now The old adage "measure twice, cut once" is as important for plasma arc cutting operators as it is for carpenters. The phrase could be reworded to "inspect twice, cut once" for the plasma industry. Careful preparation, setup, and maintenance can alleviate many costly problems which... Read more...

Article

February 19, 2001
Shielding gas consumption efficiency-- Part I: Spend a penny, save a dollar Editor's Note: This is the first of a two-part article that discusses shielding gas efficiency. The second part also appears on thefabricator.com. Although argon is the most commonly used shielding gas for solid-wire electrode applications, many managers and welders understand little about... Read more...

Article

February 19, 2001
Designing for successful robotic arc welding automation This dual robot system uses a large "Ferris Wheel" positioner to give the robots access to the underside of the parts to be welded. Automated robotic arc welding systems are used in all types of manufacturing. They can provide several benefits in certain welding applications. The... Read more...

Article

February 19, 2001
Orbital welding for space program applications: Producing welds that withstand the rigors of deep space A Lockheed Martin Atlas rocket launches a communications satellite for Inmarsal from Cape Canaveral Air Force Station. The propulsion systems for our nation's satellites and launch vehicles, as with every component manufactured for the NASA's Space Program, must meet high quality... Read more...

Article

February 19, 2001
Joining aluminum with GTAW: Advice for the novice Aluminum: beautiful, lightweight, strong, versatile—and a real challenge to weld, especially for beginners. This article describes some of the new gas tungsten arc welding (GTAW) equipment available and its benefits, accessories required, points to consider before welding, and the... Read more...

Article

February 19, 2001
The fundamentals of gas tungsten arc welding: Preparation, consumables, and equipment necessary for the process Gas tungsten arc welding (GTAW) is an electric arc welding process that produces an arc between a nonconsumable electrode and the work to be welded. The weld is shielded from the atmosphere by a shielding gas that forms an envelope around the weld area (see Figure 1 ). Figure 1: The... Read more...

Article

February 19, 2001
Advantages of plasma welding: Often-overlooked PAW offers speed and affordability Object Plasma arc welding (PAW) often is overlooked when a fusion welding process must be selected for high-integrity applications such as those found in the medical, electronics, aerospace, and automotive industries. This process has been overlooked because it is more complex and requires... Read more...

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