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Content tagged with "high"

Results: 38

Article

January 29, 2004
Choosing the right coated abrasive for plate finishing applications Choosing the proper abrasive starts with understanding how the grain’s shape and other characteristics affect its suitability for the type of metal being finished and the surface finish required. Some types of coated abrasive grains are aluminum oxide, zirconia... Read more...

Article

January 13, 2004
The future of structural welding Like my history of welding article , this article is my small insight into the future of structural welding. Like I said before, if you are a history or English professor—and I'll add math professor to this group after my last miscalculation, pointed out by Ted Neff... Read more...

Article

January 13, 2004
Producing side-impact profiles Euro-NCAP, which stands for European New Car Assessment Program, was introduced in 1997 by five European governments, together with the European Commission. The results of this program are followed closely by the general public, so much so that hardly any automobile producer would risk... 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

November 20, 2003
High-tech presses Figure 1 Complex drive system Stampers are looking to achieve higher productivity, better component quality, longer die life, and increased flexibility. While these capabilities are essential to maintaining an edge in today's competitive environment, they come at a price. New... Read more...

Article

September 25, 2003
Choosing the proper steel to minimize abrasive adhesive tool wear Many tools crack because of abrasive or adhesive wear. If one type is mistaken for the other, the actions taken to extend the life of a tool can have the opposite effect. Abrasive Wear Abrasive wear is caused by hard particles, such as carbides and inclusions, on the surface or within the work... 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 28, 2003
Considering thermal processes for dissimilar metals This joint has dual characteristics—a brazed joint on the steel side and a welded joint on the aluminum side. A reliable method of joining the two most commonly used metals, steel and aluminum, would make it possible to make these joints in several applications. On one hand,... Read more...

Article

July 24, 2003
Welding aluminum with inverter-based power supplies Direct Current All welding power supplies transform relatively high-voltage, low-current incoming power to lower-voltage, high-current welding output using a transformer. In the past the transformer operated directly from 50- or 60-hertz incoming alternating current (AC). At these... 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

June 12, 2003
Stretching metal's forming limits with HSP lubricants The trend in metal stamping is to use more and more aluminum and other lightweight materials, such as advanced high strength steel (AHSS). The need for technology to help improve metal flow of these materials in deep-drawing applications also is increasing. In many cases, a stamper's original... Read more...

Article

June 12, 2003
Waste not, want not How good are tube fabricators at finding hidden waste? Uncovering and eliminating hidden waste has as much to do with being profitable as any other manufacturing cost. We all know how to quote and define the structured costs involved in a job, but what can we do to take care of waste that... Read more...

Article

June 12, 2003
Designing high-strength steel stamped parts for formability The problems associated with forming high-strength steel often are created during the design stage, when products are designed in such a way that they cannot be manufactured using conventional stamping methods. Or the product requires numerous or special offline operations, such as annealing or... Read more...

Article

April 24, 2003
Cutting exotic alloys But sometimes this common process can be puzzling, especially when the fabricator is cutting titanium or other alloys. Tubing may be cut successfully in one production application, but the next time the result is galling and extremely short blade life. If an operator understands why this... 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

February 19, 2002
High-speed feeding techniques The maximum operating speed of a stamping operation should be limited, in theory, only by the maximum number of strokes per minute (SPM) that the press can achieve. In reality, production speed is limited by other factors as well. For instance: 1. The uncoiler may not unwind... 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

December 13, 2001
The basics of uncoiling Choosing proper coil handling and processing equipment can improve material handling and jump-start your shop's overall productivity improvement effort. However, before purchasing any one component, you should consider four factors: • Material to be processed • Line speed... Read more...

Article

November 15, 2001
Part nesting and die design tips for reducing and utilizing scrap in stamping operations In this global and competitive economy, especially now, it is imperative that production sheet metal stampers get the maximum part count by consuming the least possible amount of material. Most production stampers that use plain carbon steel sheet get about 5 percent of their original material... Read more...

Article

November 15, 2001
Using hydroforming aluminum components versus steel stampings As the name implies, hydroforming is a metal forming process that uses water as a forming medium. In the case of tube hydroforming, a tubular workpiece is placed between two mating die halves. The tube is sealed, normally by metal mandrels inserted under pressure in each end of the tube. Water... Read more...

Article

October 25, 2001
Metal stamping and electromagnetic forming: New process improves material formability, reduces wrinkling Object Research done at The Ohio State University during the past several years has shown that when material is stretched at high speed, it is less apt to tear than if it is stretched slowly. This is because the action of the material tearing causes a change of direction. If this is done... 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

October 11, 2001
Installing and maintaining coil cradles and reels All stamping and forming operations outside of the powder or forging industries begin with coiled steel. In many fabricators' plants, the decoiler, payoff reel, recoiler, tensioner, or other coil handling equipment require constant maintenance. Installation The nature of the... 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
Skiving strip edges for tube and pipe producing Edge treatment of coil strip before it enters a tube and pipe mill, called skiving, is a rapidly advancing technology. Improving the coil edge before it is welded helps increase the quality of the seam join and helps prevent rejected tube or pipe. Traditional Skiving Equipment Edge skiving to... Read more...

Article

July 26, 2001
Four factors to consider when purchasing a grinder: You get what you pay for Cost often is a deciding factor when you purchase a grinder. However, the saying "you get what you pay for" can be true when you're talking about tools. The price tag alone doesn't always reflect some of the more important factors—performance level, cost to operate, and tool... 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
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

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
Abrasive control factors for mass finishing systems Figure 1: Literally hundreds of media compositions, sizes, and shapes are available. With the advent of the Clean Air Act in the early 1970s, a new playing field for the coating industry began evolving. Simply providing better service and possibly better economics with the... Read more...

Article

May 30, 2001
The evolution of coatings with low levels of volatile organic compounds: Where the industry stands in its quest for zero VOC With the advent of the Clean Air Act in the early 1970s, a new playing field for the coating industry began evolving. Simply providing better service and possibly better economics with the established technology no longer could be the basis for long-term growth, but exciting new possibilities... Read more...

Article

May 15, 2001
Safety Fundamentals for Today's Industrial Lasers In today's industrial workplace, lasers are used for cutting and welding metals, bar code scanning, inventory tracking, parts identification, measurement, as well as rapid prototyping. Simply put, the uses are many, and the applications seem limitless. In a recent report... Read more...

Article

April 24, 2001
Selecting the right temporary coating: Choices abound for tube and pipe applications Temporary coatings preserve the quality of tube or pipe after it is manufactured until it is received by the end user. The primary functions of this type of coating are to prevent the formation of red rust (iron oxide on steel pipe) or white rust (zinc oxide on galvanized pipe) during storage... Read more...

Article

April 24, 2001
What is your facility cut out for? Circular and band saw purchases depend on application requirements The debate about whether to use a band saw or circular saw has been a long-running and faulty one. A more valid question is which saw is better for a particular job. The two technologies offer advantages for different applications. Neither application is fundamentally better. Each type of saw... Read more...

Article

April 10, 2001
8 ways to keep your shear in top shape Shears are common pieces of fabricating equipment that can be found in many metal forming plants. From tube mills to small fabricators, the shear is one of the most critical and diverse tools used in metal fabricating. Varying in size from small hand-held metal shears and foot-operated trim... Read more...

Article

February 19, 2001
Pressure-sequence and high-pressure hydroforming: Knowing the processes can mean boosting profits Closed-section structures have long been important in vehicle design. Typically, these have been assembled with several stampings, because no practical way existed to form tubes into complex shapes at required quality levels. Holes were more costly than in stampings, and some types... 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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