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How to avoid slit-in coil slitting problems

March 7, 2006 | By Al Zelt

Problems that can arise during metal slitting include poor edge quality, edge burr, edge wave, camber, crossbow, knife marks, and slit width that is out of specification. Some slitting problems can be attributed to poor metal quality; however, it is much more common for the problems to be caused by other variables and factors during the slitting process.

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Understanding press feeds

February 7, 2006 | By Bruce Grant

Major technology shifts in how stamping presses are fed have allowed press feed technology to evolve, enabling stampers to realize increased processing speeds, improved processing flexibility, easier setup, and better quality and reliability. Even with today's advancements, a press feed must meet three basic and important criteria to be successful: Setup must be flexible. It must deliver the material with sufficient precision into the tool and die. It must feed at the correct time. Advancements in feed technology include pilot release, space-saving line configurations, transfer/progressive operations, and scratch-free processing.

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Feeling overwhelmed with pressures?

February 7, 2006 | By Michael P. Schollmeier

Stampers face increasing pressure, from external and internal customers, every day. This, combined with increasing responsibilities, can cause production personnel to feel overwhelmed. Long die changeovers gobble up precious time that could be used for better purposes, leaving many production teams operating in a firefighting mode. Doing a thorough time study and using the results to eliminate time-wasting steps is the first step in implementing quick die change, freeing up some time for value-added activities, and getting control over your production processes.

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A new energy in appliance manufacturing

February 7, 2006 | By Stephanie Vaughan

In January 2006, a new 13 SEER mandate for appliancemakers takes effect. Although it isn't the only thing driving change in manufacturers' product designs, it is providing a springboard for manufacturers to make changes in their products that will help meet increasing customer demands.

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Die basics 101: Part VI

February 7, 2006 | By Art Hedrick

Previous articles in this series discussed common stamping die components. This article focuses on less common specialty components found only in certain dies, most of which are available from various suppliers.Figure 1Inidie Tapping UnitsImage courtesy of Danly IEM.In-die Tapping UnitsMany dies...

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Maintaining a slitting line

February 7, 2006 | By Flix Remrez

A slitting line can operate efficiently for 20 or more years if properly maintained. Modern slitting lines are high-performance machines that are intended to produce 24 hours a day, 365 days a year. As a result, stampers must be sure that all line elements are properly maintained, which represents a titanic effort if you don't understand what components are critical.

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Coil feed line considerations when stamping HSS

December 13, 2005 | By John Heuring

With its higher tensile and yield strengths, HSS is stronger at any given gauge than conventional "mild" steels. Initially, lighter-gauge HSS was used to replace heavier-gauge mild steel to reduce weight in many automotive parts, and this continues to be the most widely used application for HSS. However, as a new trend to run thicker and thicker gauges of HSS continues, stamping fabricators are evaluating their press feeding and coil handling equipment, as well as press tonnage capacities and die designs to ensure that these harder parts can be formed effectively. The dynamics of HSS have a bearing on feeding, straightening, and coil handling equipment.

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Straight to the point

December 13, 2005 | By Brian Landry

The straightener, when set properly, removes the coil set, or curvature of the rolled material. If the machine is used or set incorrectly, the coil set can remain in the material, even after being struck in presses with capacities to hundreds of tons. This can cause a variety of problems: out-of-tolerance parts, difficult feed operations that can disrupt and slow performance, and, to some extent, additional wear and tear on feed line components and tooling.

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A need for speed

December 13, 2005

Currently, Dana's Chatham, Ontario division produces several heat shields for fluid-management systems including heat exchangers, valves, and coolers. With higher demand yields and new orders, the stamper needed an automated press line that could improve uptime, quality, and reliability.

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Achieving consistent stock lubrication with less oil

December 13, 2005 | By Ron Hawkins

Low-volume, low-pressure (LVLP) lubrication systems can offer stampers a way to maintain the most appropriate lubrication level for each job while reducing oil consumption.

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Die basics 101: Part V

December 13, 2005 | By Art Hedrick

Many specialty components can be used in dies, but the most commonly used are die plates, shoes, die sets, guide pins, bushings, heel blocks, heel plates, screws, dowels, and keys—all of which were explained in Part IV of this series. This article focuses on other common components—pads,...

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Cushioning the blow

November 8, 2005 | By Dan Davis

Hercules Machine Tool & Die Co. has intalled a fully programmable hydraulic cushion onto a mechanical press in hopes that it can cut down on try-out time and attract more business involving specialty stamped parts

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Quick die change and the trend toward larger presses

November 8, 2005 | By Mark Cairney

Through the use of such tools as T-tables, die carts, and rolling bolster systems, stamping companies can help increase the uptime of their pressroom operations, increase levels of operational safety, and improve their bottom lines.

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Okay with tool coating

November 8, 2005 | By Todd Earl

"Okay Industries, New Britain, Conn., serves diverse market segments including medical, automotive, electronics, defense, and specialty industrial. The stamper produces a roller finger follower for automotive applications. There are 14 stations on the die. The TD process is used on three of them," DeVecchis said. "It has given us better product quality, less scrap, faster throughput, longer die life, and reduced die dressing."

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Knockout punch

November 8, 2005 | By Scot Stevens

The system Sanmina-SCI uses to produce rails for Sun Microsystems' large servers is a key factor in Sanmina-SCI's competitiveness when it comes to processing a large, heavy-gauge, complet part, delivered in large volume on an as-needed basis for computer server systems and other similar applications.

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