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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What to look for in end-of-arm tooling

February 28, 2002

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Many factors affect the real cost of clamps used in end-of-arm tooling. Their original price is important, but other factors have a major effect on production. Four of the most important are delivery, flexibility, durability, and useful life.

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High-speed feeding techniques

February 19, 2002

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Gripper or roll-type feeds operate on the principle of feeding force, which is a product of the coefficient of friction between the grippers or feed rolls and the material being fed. Reviewing each force as a factor of the feeding equipment or feeding conditions helps in evaluating the feeding process.

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Design rules for forming aluminum stampings—Part 1

February 2, 2002

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This brief overview discusses rules for aluminum stamping involving: die clearance, die radius, punch radius, minimum bend radii, round cups, rectangular box parts, and overhang limit.

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Design rules for forming aluminum stampings—Part 2

February 2, 2002

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Figure 1:Addendum types enable or improve the stamping of a sheet metal part. A draw wall, for example, connects the trim line and the punch opening line.Editor's Note: This column was prepared by the staff of the Engineering Research Center for Net Shape Manufacturing (ERC/ NSM), The Ohio State...

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Warm forming of aluminum alloys

January 31, 2002

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Federal government and U.S. automakers to develop technologies for a newgeneration of vehicles to triple fuel efficiency without sacrificing performance, affordability, or safety.

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Coil set

Forming high-strength materials

January 31, 2002

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Various shape defects can be encountered in flat-rolled ferrous and nonferrous strip. Knowing their mechanics and origins and how to correct them can be very useful in times of need.

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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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