Content tagged with "punch"
Results: 14
Article
August 9, 2005
Oversized V dies: the effects on bottom bending
Figure 1
Why are so many press brake and tooling manufacturers adamant that you cannot bottom-bend with their products?
One word: Liability!
It's so easy to upset* a ram or blow tooling if bottom bending is done incorrectly. So who can blame the manufacturer for... Read more...
Article
September 14, 2004
The growing versatility of turret punch presses
Press Drive Flexibility Higher hit rates on a mechanical ram system are a direct result of the faster axis speeds and quicker acceleration and deceleration supplied by servo systems. A mechanical ram has a fixed stroke length, which starts at the fully retracted position and finishes... Read more...
Article
July 13, 2004
Getting more punch life
Augur Metal Products, a custom fabricator in Independence Ken., performs a variety of processes for manufacturers. While the company's capabilities include shearing, cutting, forming, welding, and finishing, chief among them is sheet metal punching. One of its processes involves punching... Read more...
Article
June 8, 2004
Pumping up productivity on older press brakes
Tall gooseneck punches can bend deep parts and parts with complicated bend sequences. In recent years faster, more efficient cutting and blanking methods have emerged. However, these cutting efficiencies and corresponding increases in productivity have not always been met with similar... Read more...
Article
June 8, 2004
Advanced lubricant technology for high-strength steel
Figure 1 As if the recent rise in steel prices weren't enough, now automotive stamping suppliers are faced with the difficult task of getting high-strength steel (HSS) to form parts with tooling designed for mild steel. In an effort to reduce vehicle weight and improve gas mileage,... Read more...
Article
February 26, 2004
Three optional techniques for beveling
All of these methods generate no dust or fumes and produce paintable edges without distortion or a heat-affected zone (HAZ). Finished edges have consistent angles along the bevel's entire length. Punch and Nibble Method Punch and nibble-style bevelers are portable power tools... 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
August 28, 2003
Die geometry for embossing and stretching
Embossing usually refers to the stretching of metal into a shallow depression. Unlike drawing, embossing entails little or no inward metal flow. Some automobile hoods and parts are made using a stretching operation, while others use a combination of drawing and stretching (see Figure 1 ).... Read more...
Article
July 24, 2003
Die width selection
Most designers and engineers usually place very little importance on achieving the correct inside radius of a formed part. Why? Because the functionality of the part is unaffected if the specified inside radius is 0.062 in. and actual measured inside radius is 0.078 in. So why do we care about... Read more...
Article
May 29, 2003
Making your own punch and dies
Speaking from 30 years of experience, I'd say this situation probably is a fact of life for 99 percent of us. Whether we are doing some in-house engineering and design or working at the press brake, the thought is the same.
An End to the Dilemma
Sure enough, there is a reasonable solution... Read more...
Article
May 15, 2003
Producing holes in tubing
Producing holes in tubing with punch press tooling can be divided into two main processes: punching and piercing (see Figure 1 ). Tube Piercing Tube piercing is different from traditional hole punching in that a die is not employed on the underside of the material. Instead, external... Read more...
Article
April 24, 2003
Applying and handling die lubricants
Effective application of die lubricants typically is overlooked in many stamping facilities. Many companies try to get by with applying as little lubricant as possible, just so they don't have to deal with the mess. However, metal stampers need to move away from thinking of in-die... Read more...
Article
April 10, 2003
Improving perforating die performance
To perforate the part material, the material must fail. The harder the part material, the greater the forces on the punch and matrix become, resulting in sudden shock, excessive wear, high compressive loading, and fatigue-related failures. During impact and penetration, the cutting edges... Read more...
Article
March 23, 2001
Selecting a new press brake
You have realized for a long time that your company should consider buying a new press brake. Now you have the responsibility of developing the specifications and recommending a new machine. This is an awesome responsibility, because if you select the wrong machine, your manufacturing costs... Read more...
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