Content tagged with "weld"
Results: 37
Article
September 11, 2007
Improvements to CNC plasma technology
A plasma cutting table is a workhorse in most fab shops. The technology has seen great improvements over the years, and it's worthwhile to take a look at its evolution. Not coincidentally, plasma technology's growth has coincided with technology improvements starting with the CNC. Computer... 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
February 13, 2007
Arc Welding 101 - Preheating a shaft-sprocket assembly
We are welding 1018 cold-rolled, 2.5-inch-diameter shaft to a sprocket made from 1045 steel. We preheat the shafts to about 200 to 250 degrees. We are having some failure of the shaft, and I'm wondering what the proper procedure is for welding the assembly together. The sprockets are welded... Read more...
Article
August 10, 2004
Tips for welding preparation
Advances in equipment automation and the development of new and exotic tubing materials have affected welding techniques and weld preparation. The levels of cleanness required in many industries—medical, electronic, aerospace, chemical, pharmaceutical, agricultural, and... Read more...
Article
July 13, 2004
Welding Miniature Devices
Welders have been joining miniature electromechanical devices for industrial and medical applications for more than 30 years. However, it's a subject that hasn't been featured much in papers and technical publications. The history of joining miniature devices goes back to the turn of the... Read more...
Article
June 8, 2004
Revving up weld quality
Before introducing new resistance welding systems, Ford Motor Company's New Model Product Development Center was cluttered and dark, and it was difficult to work there because of the high number of weld controls and weld guns being used (left). Installing weld controls and associated... Read more...
Article
April 6, 2004
Titanium—You can weld it!
"Titanium need not be all that hard to weld!" The American Welding Society (AWS) 1 said it, and I agree. Well-done titanium welds look like frozen mercury: shiny and reflective. A couple of basic factors make titanium different from other metals. These unique characteristics, and a lack... Read more...
Article
March 11, 2004
Article
March 11, 2004
Flying high with orbital welding
The first machines developed were large, upright, stationary systems that could be used only for workshop applications. These systems also had to make several rotations to complete a joint because only single-level power supplies were available. To make consistent welds, they had to make... 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
August 28, 2003
Inverter versus transformer power supplies for aluminum GTAW
I'm looking for a new GTAW power supply for AC aluminum welding. I had intended to buy a conventional transformer unit, but several people have told me to buy an inverter-based power supply. Which one is better for my application? Inverter-based power supplies do have some advantages over... Read more...
Article
August 14, 2003
Notching tube and pipe
The Hole Saw Using a hole saw is an inexpensive way to make the occasional notch for a weld joint. More for the hobbyist, hole saws can be used with a drill press or, for portability, with a hand-held drill. Multiple corresponding hole saws must be used to make notches with... Read more...
Article
August 14, 2003
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
April 24, 2003
Improving the bottom line in automotive applications
Total Cost of Quality
Most people think only about the costs associated with internal failures, such as rejects or scrap, and external failures, such as shipped product that needs to be repaired, scrapped, or returned. Other costs associated with quality that can be incurred include appraisal... Read more...
Article
April 24, 2003
Welding cold-rolled steel to cast iron
Dear Elmer: Is there a way to weld 1018 cold-rolled steel to cast iron? If so, how? James Owings Mills, Md. Dear James: You can weld 1018 low-carbon steel to cast iron using shielded metal arc welding (SMAW) and a nickel-based ENiFe electrode. Clean the surfaces before you start.... 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
June 13, 2002
Mixing welds & bolts
In a variety of structural situations, an engineer may need to assess the strength of a connection made with welds and mechanical fasteners. Today mechanical fasteners typically are bolts, but older structures may include rivets. Such situations may occur during retrofit, repair, or... Read more...
Article
March 26, 2002
Is Your Welding Lean?
Following World War II and during the rebuilding of the Japanese industrial base manufacturers recognized that to restore production of manufactured goods and be globally competitive, new methods were necessary. One of the pioneers in this re-engineering of manufacturing was Toyota, led by... Read more...
Article
January 24, 2002
A dream come true
After only one lesson in oxyacetylene welding, he made his first sculpture. Rubino said he couldn't believe his cousin showed him how to use an oxyacetylene setup, and then left him to experiment—in a wooden-frame, 100-year-old house, amid wood scraps and sawdust—while he went... Read more...
Article
December 13, 2001
Radiographic and ultrasonic weld inspection
Radiographic and ultrasonic weld inspection are the two most common nondestructive testing (NDT) methods used to detect discontinuities within the internal structure of welds. The obvious advantage of both of these testing methods is their ability to help establish the weld's internal integrity... Read more...
Article
November 15, 2001
Article
August 16, 2001
Article
August 16, 2001
Solving problems on the tube mill
Tube mill operators face a variety of challenges every day in their effort to produce high-quality tubing in a cost-effective and productive way. This article examines some of the typical problems producers encounter, some common causes of these problems, and some ideas for how to solve these... Read more...
Article
August 16, 2001
Article
July 12, 2001
The growing use of orbital tube welding
This trend is due partly to orbital welding's capability to make an entrapment-free, permanent connection that is highly resistant to vibration. This makes it a good choice for joints that are not intended to be disassembled in the future. However, the appeal of orbital welding also is due to... Read more...
Article
July 12, 2001
Laser welding of stainless pressure tubes
The vast majority of welded stainless steel pressure tubing is produced with the gas tungsten arc welding (GTAW) process. This process often is referred to as tungsten inert gas (TIG) welding. However, with the recent advent of reliable, high-power laser power sources, the laser beam... Read more...
Article
May 30, 2001
Skelp edge preparation for manufacturing ERW pipe
Achieving a quality weld requires starting with good edges. In manufacturing electric-resistance- welded (ERW) pipe and tube, this is critical. Perfect edges are almost impossible to obtain consistently by rotary side trimming single-width coils or side trimming and slitting master... Read more...
Article
May 30, 2001
Article
April 24, 2001
Examining electric resistance weld nuggets in tube and pipe
An in-depth examination of electric resistance welding (ERW) weld nuggets as a quality control step in the manufacturing of high-strength tube and pipe used for pressure applications has been a proprietary procedure for some manufacturers for several years. Types of pressure-application tube... Read more...
Article
April 24, 2001
Troubleshooting your stamping operation
A manufacturing process can be defined as altering the configuration or shape of raw material and/or previously manufactured components with a combination of equipment, tools, and operators to create a new product. Over time, any manufacturing process becomes vulnerable to alteration through... Read more...
Article
March 26, 2001
Producing quality ASTM A249 and ASME SA 249 pressure tubes
Object Producing quality ASTM A249 and ASME SA249 pressure tubes takes more than just applying a stencil to the product. It requires a manufacturing process and a quality system that not only provide an excellent weld, but also condition the weld through proper cold working (forging) and... Read more...
Article
March 5, 2001
Article
February 19, 2001
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
Article
February 19, 2001
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