Content tagged with "bend"
Results: 16
Article
June 29, 2009
Focusing on bent tubing
You have been bending tube and pipe for years, and while you're proficient at bending, you realize that you're spending too much time on quality control. Some of the parts are easy to handle and have just one or two bends, so measuring the straight sections and verifying the bend angles isn't... Read more...
Article
February 26, 2004
Tube Hydroforming Design Flexibility—Part V
Editor's Note: This article is Part V in a series about tube hydroforming design flexibility. Please read Part I , Part II , Part III , Part IV , and Part VI .
Combined with the information in Part III of this series that focused on cross-section expansion before hydroforming,... Read more...
Article
January 29, 2004
Why should you care about inside bend radii?
Photo courtesy of TRUMPF Inc.
A minimum bend radius is a function of the material and has little or nothing to do with the press brake punch tip. A minimum bend radius for one material thickness is not the same for another material thickness. In cold-rolled mild steel,... Read more...
Article
January 13, 2004
Troubleshooting compression bending
Most compression bending problems are one of three types: Flattening or collapsing on the outside of the bend. Crimping or wrinkling on the inside of the bend. Dimpling on the inside of bend. Generally you can prevent these problems by implementing these standard solutions:... Read more...
Article
October 9, 2003
Controlling bend angles
Spring-back Analysis All metal has a certain amount of spring-back. Spring-back, also known as elastic recovery, is the tendency for the metal to want to return to its original flat blank shape after being bent. To fully understand why metal springs back, we first must understand that metal,... Read more...
Article
September 25, 2003
The wrinkle-wiper for tube bends
Figure 1 Here's a quick quiz for you to take: What "wipes" the wrinkles from the bend in a tube and is one of the five pieces of tooling in a die set? If you guessed wiper die, you're right. A piece of tooling used to keep the inside bend of a tube from wrinkling, a wiper die... Read more...
Article
August 28, 2003
Designing an off-road sport truck
They're big. They're mean. They growl and snarl. Untamed beasts, they're at home anywhere, regardless of the terrain or the climate. They prowl over mountains or deserts or backwoods trails, whether the conditions are warm or cold or wet or dry. They're custom-made off-road trucks, and... Read more...
Article
July 10, 2003
Article
October 24, 2002
What the? This can't be done!
"What the ...? This can't be done!"
How many times have you heard that expression? Or seen someone scratching his head in bewilderment when trying to decide which flange to form first or last, not unlike the operator pictured in the lead photograph?
Sure, we've all been there, but... Read more...
Article
July 11, 2002
Can I form a box that deep?
Figure 1
One of the more common questions asked in day-to-day press brake operations is "Can I form a box that deep?"
If you select the wrong tool, the side of the box will crash into the ram. This can produce the wrong bend angle or prevent the forming of tight corners. In most... 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
October 25, 2001
Article
July 26, 2001
Bend deduction charts
In reviewing a couple dozen bend deduction charts from a variety of sources, I couldn't find any that agreed with another, with the exception of a single number here and there. For the most part, they varied widely. Figure 1 shows data from five of those charts selected at random.... Read more...
Article
June 12, 2001
Leaping the hurdles to press brake automation
Figure 1: This figure shows the ratio of value-added versus nonvalue-added time for a 50-part bending job. In this example, 42 percent of the time needed to bend the parts was spent on setup. Understanding the obstacles to automating press brakes requires an analysis of the bending... Read more...
Article
May 30, 2001
Discovering the limits of press brake tooling
One of the most important aspects of press brake forming is tooling selection. What are the tools capable of? What kinds of loads can they withstand?
Figure 1:
A standard straight press brake punch withstands more tonnage per foot than the press brake itself withstands.... Read more...
Article
May 15, 2001
Know your bending basics—Part I
Editor's Note: This article is Part I of a two-part series discussing bending. Read Part II .
Of all of the operations that typically are done in a stamping die, it seems that achieving and maintaining a 90-degree bend are two of the most difficult.
To accomplish these tasks... Read more...
Didn't find what you were looking for? Try our search page to refine your results
