The bending technology area includes all manner of machines and processes for bending sheet metal, including press brakes, folders, panel benders, corner formers, ironworkers, notchers, orbital formers, and roll benders. It also has information on accessories such as gauging and backgauging systems.
January 10, 2006 | By Bob Butchart
Every press brake is subject to normal deflection under load. This deflection is corrected by shimming. If you deflect behond design limits, you will put a permanent bend in the ram and this is known as ram upset. You cannot adjust to compensate for ram upset. Remachining of the ram is the only solution. To avoid causing ram upset be careful about bending loads above your tons per inch limit and only air bend if possible.
November 8, 2005 | By Steve Benson
Properly trained press brake operators understand the nuances of tapers. Armed with this knowledge and following a five-step process that includes inspecting tooling and materials, precise setup, checking the part, and making necessary adjustments, these skilled workers can complete machine setup and produce quality parts in minimal time.
September 13, 2005 | By Ninad Nargundkar
This study illustrated that, when the thickness and stress-strain curve of the sheet material are known, it is possible to predict with acceptable accuracy the bend allowance, springback angle, and punch stroke to obtain the desired final product dimensions.
September 13, 2005 | By Todd Kirchoff
The types of press brake projects that remain in the U.S. tend to be those requiring smaller lot sizes, shorter turnarounds, and more complex shapes than those going offshore. Enter the need for smart press brakes—those with the capability to store and apply process intelligence. Today's shrinking lead times and smaller lot sizes demand more frequent setups, which cut into production hours. Graphical machine controls and offline programming can help maximize operational time by eliminating the time for trial-and-error setup and improving first-part accuracy.
August 9, 2005 | By Steve Benson
Using oversized V dies in bottom bending can damage press brakes and tooling, but used properly, these dies can help compensate for springback.
June 14, 2005 | By David Bishop
Reducing nonvalue-added time—back guauge origin, nonprecison clamping surfaces, die shimming, scrap, and inefficient tooling storage—over time can save thousands.
April 11, 2005 | By Scot Stevens
Red Dot Corp., forced by eroding margins to consider lean manufacturing and reduce lead times, embarked on a project to reduce wasted time, materials, and space. As part of this project, the company decided to move some of its manufacturing processes from its main plant in Seattle, Wash., to one of its distribution hubs in Ipswich, England. Because the facility would rely on a single press brake, Red Dot shopped around for a press brake that would run continuously with a minimum of service calls. The company's success in press brake operations in Ipswich led it to overhaul its press brake operations in its facilities in Seattle and Memphis, Tenn.
August 10, 2004 | By Shawn Shultz
Over the past several years the sheet metal fabrication industry has witnessed a number of technological advancements in both machines and tooling. Machines are now capable of punching, cutting, and bending faster and more accurately than previously imaginable.
June 8, 2004 | By David Bishop
You may be able to improve press brake productivity and eliminate bottlenecks with more advanced tooling, anti-deflection [crowning] systems, and clamping systems. Such advancements have made it possible to form a larger range of materials and part configurations with fewer tools than before.
May 4, 2004 | By Steve Benson
Air forming, bottom bending, and coining are metal forming methods. Air forming, the most common, is a three-point operation. The actual inside radius produced is based on a percentage of the V-die width, regardless of the sharp–radius relationship. Selecting the correct die width can be...
April 6, 2004 | By Kate Bachman
As more commercial buildings are designed with larger open spaces, the beam spans grow longer, and the beams must be bigger and heavier. This requires ever-larger section bending rolls to accommodate this demand. In addition, the trend toward the use of higher strength steels has taxed the capabilities of plate roll bending equipment. These changes and other emerging demands have driven the trend toward the use of CNCs, inline material handling, and larger angle bending rolls.
March 25, 2004 | By Steve Benson
Have you ever wondered about the best way to store your press brake tooling? An expensive part of your press brake operation, tooling is damaged enough just by daily wear and tear and accidents. You don't want to damage it further by storing it improperly.
January 29, 2004 | By Steve Benson
Operators, designers, and engineers, why should you care about the inside bend radius if the customer doesn't? Because, ultimately, just how easy or difficult it is to produce a part depends on decisions made during the design stage. Misunderstanding terminology, process capabilities, or production methods can lead to mistakes that can make production more difficult. The most common mistake is incorrectly calculating and achieving the correct minimum inside bend radius.
November 20, 2003
The Ottenweller Company Inc. is a heavy sheet fabricator that produces fabrications and assemblies for construction and agricultural equipment manufacturers and heavy-duty truck builders. The family-owned business employs 150 and operates from a 120,000-square-foot facility in Fort Wayne, Ind.
November 6, 2003 | By Todd A. Kirchoff
Press brake forming always has been a labor-intensive process. Shrinking lead-times and smaller lot sizes demand more frequent setups, which cut into productive output hours and put more pressure on manufacturing efficiencies. Fabricators need to find ways to reduce machine downtime for setup and operator adjustments.