Bending Articles

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.

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Press brake safety

Safety still pressing for press brakes

January 9, 2007

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The leading trend in press brakes safety is to ensure safety without sacrificing speed or hampering operators' ability to work efficiently, say press brakes manufacturers. This starts with tooling, including segmented or sectionalized tooling that is lighter and easier to handle; safety features that prevent unsecured tooling from falling, and fewer tool changes. It is further achieved with light curtains, camera and vision-based sensors, and mechanical side and rear guards, as well as automation and robots.

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Machine tooling

Avoiding common bending problems with common sense

December 12, 2006

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Tooling determines the outcome of a bending operation. Whether an application is simple or complex, matching the right tooling with the bending equipment and method will save both time and money.

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Manufacturing evolution in the job shop

October 10, 2006

Gardner Manufacturing, Horicon, Wis., needed automation and flexibility to keep up with more challenging customer demands. The contract manufacturer found its answer with two laser cutting devices with automated material handling and three new press brakes capable of precision bending.

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Leaning on press brake tooling

September 12, 2006

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Press brake tooling can play a significant role in minimizing setup, reducing WIP, increasing throughput, and minimizing waste—the goals of lean manufacturing. Some new developments are staged bending, push-button loading, sectionalized tooling, and precision-ground tools.

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Fabricator puts the brake on bend inconsistency

June 13, 2006

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Well-known for agriculture, Nebraska also has a strong manufacturing base. OEMs include Kawasaki, Husqvarna, Eaton, Thermo King, Claas, and Case New Holland. Standard Iron & Wire, a Minnesota-based fabricator, opened a manufacturing facility in Grand Island, Neb., to take advantage of this fertile manufacturing environment. Chief among its concerns was finding a press brake that would produce accurate, consistent parts. It purchased two LVD press brakes with the company's adaptive bending technology.

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Roll bending a wind tower with a three-roll bender

April 11, 2006

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Three-roll bending with a variable axis offers an advantage over four-roll bending for bending conical sections in that it allows for a good leading edge and rolling without having to lift the plate to pivot it with a bridge crant.

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Taking the danger out of bottom bending

March 7, 2006

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It is all too easy to ruin a tool or upset a ram if bottom bending is done incorrectly, which is why many manufacturers do not recommend bottom bending when using their equipment or tooling. Understanding V-die selection and the effects of your decisions should be first and foremost in any bending operation, including bottom bending.

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Simplicity 'n' press brakes

February 7, 2006

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Simplicity Manufacturing Inc. of Port Washington, Wis., needed new press brakes because it was about to increase its laser cutting capacity. The outdoor power equipment manufacturer turned to a vendor of Turkish-built press brakes for help and found the answer for which they were looking.

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How to prevent press brake ram upset

January 10, 2006

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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.

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Say ye shibboleth!

November 8, 2005

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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.

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Bend allowance and springback in air bending

September 13, 2005

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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.

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Software brings new intelligence to press brakes

September 13, 2005

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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.

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Oversized V dies: the effects on bottom bending

August 9, 2005

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Using oversized V dies in bottom bending can damage press brakes and tooling, but used properly, these dies can help compensate for springback.

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Taking a long-term view of press brake productivity

June 14, 2005

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Reducing nonvalue-added time—back guauge origin, nonprecison clamping surfaces, die shimming, scrap, and inefficient tooling storage—over time can save thousands.

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Up Around the Bend

April 11, 2005

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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.

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