Content tagged with "sheet"
Results: 23
Article
December 11, 2003
Folding technology makes sweeping changes
In particular, sheet metal was used extensively for roofing and building cladding. These applications were well-suited to the swing bending machine's geometry, and the modern metal folding industry was born. A number of German manufacturers began adding powered backgauges with... Read more...
Article
October 9, 2003
Using finite element analysis to roll-form tubes
Figure 1 Roll forming causes yield stress, flow stress, and hardness variations in material properties around a tube's circumference. These variations may lead to premature bursting or excessive thinning in hydroformed parts. This makes it necessary to determine the effect roll forming... Read more...
Article
September 25, 2003
Roll formers look for a win
Many systems enable users to download a DXF drawing directly into the roll forming line's computer. Not everyone can be the New York Yankees, or even the roll forming version—especially in today's economic climate. It would be nice, though. The Bronx Bombers have used a fat wallet... Read more...
Article
June 26, 2003
Taking an integrated build approach to stamping tool tryout
North American tool buyers are pushing to lower tool costs by: Seeking foreign suppliers with low-cost structures resulting from low labor costs and government subsidies. Aggressively advancing math-based tools, particularly in engineering, to improve design quality and reduce die rework.... 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
Dieless NC forming
Figure 1 The principles of dieless forming are demonstrated on a three-axis CNC machine. Source Amino Corp. Editor's Note: This column was prepared by the staff of the Engineering Research Center for Net Shape Manufacturing (ERC/ NSM), The Ohio State University, Professor Taylan... Read more...
Article
September 12, 2002
Designing a hydroforming press for research, production
Hydroforming machines--whether designed for sheet or tubular hydroforming--rely on fluid to form or shape metal blanks into finished or semifinished components. While designing a machine for tubular hydroforming can be a monumental task, designing one for sheet hydroforming is more complex... Read more...
Article
April 15, 2002
Sheet hydroforming in automotive applications
Figure 1 Object Editor's Note: This column was prepared by the staff of the Engineering Research Center for Net Shape Manufacturing (ERC/ NSM), The Ohio State University, Professor Taylan Altan, director. Various types of sheet hydroforming operations, specifically rubber forming and... Read more...
Article
March 14, 2002
How important is sheet and plate steel flatness?
Figure 1
Hot-rolled sheet coils generally reveal some or all symptoms of poor flatness.
Steel has the tendency to cling to its original shape and molecular composition. Why? Because it was given a unique configuration when it was rolled, cooled, and coiled at the steel mill.
In... Read more...
Article
December 13, 2001
Punching tips
I used to listen to an eight-track tape of Buffalo Springfield while I ran a kick punch. If you've never seen a kick punch, it basically is a lever-operated C-frame press. You cause the punch tip to lower by pushing a pedal forward with your foot.
I remember running a job on some 16-gauge... Read more...
Article
December 13, 2001
Keeping pace with today's punching requirements
Figure 1 The punch, die, and stripper's function still is to punch holes that are a specific size and shape into sheet metal in a specific location. The quest for accurately punched holes, top-quality piece parts, and long tool life can be a positive experience when you consider your... Read more...
Article
November 15, 2001
Adaptive bending
In conventional press brake bending, the bend angle obtained often differs from the programmed angle even though it is produced on a CNC machine. To overcome this problem, the bend angle can be measured during the forming process and this information fed to the numerical control. This process... Read more...
Article
November 15, 2001
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
Article
October 11, 2001
The importance of the n value in sheet forming
Figure 1: Magnitudes of elongation at the onset of necking vary with the n value. Editor's Note: This column was prepared by the staff of the Engineering Research Center for Net Shape Manufacturing (ERC/ NSM) , The Ohio State University, Professor Taylan Altan, director. Strain... Read more...
Article
September 4, 2001
Putting a spark into cutting productivity
Figure 1 There are many ways to cut sheet, plate, tubing, and structural shapes, ranging from a hand hacksaw to power shears and lasers. The best choice depends on the situation at hand, but the goal always is to achieve the best cost, quality, and schedule results. While... Read more...
Article
May 30, 2001
Article
May 15, 2001
Hydroforming of tubes, extrusions, and sheet
Hydroforming tubes, extrusions, and sheet metal is a state-of-the-art enterprise and is just now becoming more popular in the industrial production of frames for light trucks and vans. Figure 1: Hydroforming tubes with outer pressure, though not the norm in the industry, has several... Read more...
Article
February 19, 2001
Article
February 19, 2001
Article
February 19, 2001
Article
February 19, 2001
Auto industry demands shape the future of stamping
Editor's Note: This column was prepared by the staff of the Engineering Research Center for Net Shape Manufacturing (ERC/ NSM), The Ohio State University, Professor Taylan Altan, Director. As we face the 21st century, the stamping business continues to be driven primarily by the automotive... Read more...
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