Stamping

Whether you're using a high-speed stamping press to make simple parts at breakneck speeds or doing something really tricky, like deep drawing a material that puts up a lot of resistance, the information in this technology area is sure to help. The articles, case studies, and press releases cover stamping presses, lubricants, and materials.

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The HOW, WHAT, and WHY of liquid impact forming

January 24, 2002

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Liquid impact forming, a patented process developed by Greenville Tool & Die Co., Greenville, Mich., uses a conventional stamping press with a liquid medium to manufacture parts that otherwise would require hydroforming.

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How link motion affects blanking, feeding, and inertia on mechanical presses

January 10, 2002

You can reduce shock and vibration in your press operations by modifying your press's slide motion to more effective absorb the press's force.

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Press feed options for stampers

January 10, 2002

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The two basic press feed types commonly in use today are roll feeds and gripper feeds. Roll feeds, as the name implies, use rollers to move the material into the tool, while gripper feeds employ gripping clamps and a linear motion to move the strip.

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The basics of uncoiling

December 13, 2001

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A review of the basic components of a coil handling system which covers servo drive roll feeds, cradles and reels, straighteners and combination units.

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Pairing a servo feed with a pull-through straightener

December 13, 2001

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This article explores the possibility that servo feeds can be used with pull-through straighteners as opposed to a conventional feed line that uses a powered straightener. Using the servo-PTS (pull-through straightener) can save money on equipment and material. The only limitation may be marking the material so noncosmetic applications are recommended.

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Hydraulic workholding from scratch

December 13, 2001

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Hydraulic clamps are used in place of manual or toggle clamps to hold the workpiece or tool in place during stamping. This article examines the four steps that comprise the selection and installation of a hydraulic workholding system: cylinder selection, cylinder force and stroke, power source selection, and system connection.

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Designing presses and dies with FEA

November 29, 2001

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To develop or find a new tool and perhaps a new press to make a part, managers need information about the tonnage requirement, which mean they will need to know more about how the part will form and the loads it will impart into the press and tooling also. Linear or nonlinear finite element analysis (FEA) can find the information so managers can make an informed decision. With FEA, a fabricator uses a computer-aided design system to develop a model of the part, and then the computer divides the part into many small parts. The FEA software then applies standard stress analysis equations to each side of every part.

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Gettin' down with downtime

November 29, 2001

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Reducing the time it takes to change dies it important to all stampers, especially for custom stampers that run small-quantity jobs. This article summarizes the ways in which automation has helped in this process and then covers two die change methods that are used in a quick change system: the standardized clamping system and the V-notch, or key, system.

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Automotive assembly line

Preventative maintenance as a way of life

November 29, 2001

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The author relates his experience as preventive maintenance (PM) coordinator at a Big 3 automaker. The purpose of preventative maintenance is to gain control of the processes. This begins with data collection on die sets, die failure and material handling damage that will identify weak areas in the stamping process. The author's team began with one set of dies and eventually its PM program was so successful that it was implemented throughout the entire plant.

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Part nesting and die design tips for reducing and utilizing scrap in stamping operations

November 15, 2001

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You might be able to gain a competitive edge by learning how to reduce the amount of engineered scrap, or that material that was inteded to be scrap rather than scrap created because of defective piece parts.

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Meet the Press

November 15, 2001

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The article briefly covers stamping terms and discusses press considerations for those purchasing a hydraulic blanking, stamping, or deep drawing press.

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Link drive presses

Contract stamper increases die life and draw die productivity

November 15, 2001

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Jancox Stampings has remained competitive by investing in link drive mechanical presses from PTC, offering value-added assembly services, and encouraging employee initiatives. The article discusses how the presses work and how reduced speed reduces springback (which allows the company to meet the...

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Cryogenics—Putting the Freeze on Wear Answering Some Commonly Asked Questions

October 25, 2001

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While cryogenics has been around for awhile, alot of shops don't know how to use the process to their advantage. Knowing a few basics may help your shop turn that around.

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Maxwell Magneform

Metal stamping and electromagnetic forming: New process improves material formability, reduces wrinkling

October 25, 2001

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This article describes the development of electromagnetic forming (EMF) and how EMF works.

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C-Frame Stamping Presses

Achieving straight-side capabilities in a gap-frame press

October 25, 2001

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Recent changes in tooling technologies, material specifications, part quality requirements, and inventory levels have driven the demand for new developments in the way a mechanical press operates. This article discusses how link motion and bridge-frame structures help stampers. This includes a description of what link motion is and how it works, and how bridge frame presses affect frame deflection.

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