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July 9, 2015
Moving scrap via beltless conveyors has been going on for awhile. But what options are available? Which are best for which applications? Do the benefits of beltless outweigh the drawbacks? Is anything new in beltless conveying technology?
July 1, 2015
Elevated-temperature (ET) forming of aluminum can be accomplished isothermally or nonisothermally. In isothermal warm forming, the die, blank holder, and punch are heated. In nonisothermal deep drawing, the die and blank holder are heated, and the punch may or may not be cooled. The die and punch...
July 1, 2015
When I conduct training seminars on drawing and stretching, I usually bring with me a variety of unusual parts made using those processes. Often, attendees ask how to stretch the metal into a shape such as a deep can or deeply formed part without splitting the metal. I simply answer: “We don’t....
June 29, 2015
Q: I have an issue regarding the consumption of stamping lubricant in our facility. The toolroom is requesting to use only new lubricant rather than recycled, as well as a richer lubricant mix in some tools. This is increasing our lubricant and disposal costs. Is there a test that I can perform...
June 23, 2015
Press-hardening high-strength steel is an important component in automotive construction to provide crash-worthiness. Several coating options are available today for use on stamped, press-hardened steel parts. However, none of these options are without limitations or challenges, such as cracking, coating transfer, fumes, weldability problems, and the need for shotblasting. A new coating technique has been developed and shows promise. The coating is a very thin (2- to 3-μm-thick), paint-like, rather than metallic, coating. It consists of a siloxane resin acting as the binder with aluminum flake to act as the sacrificial filler, so it meets the requirements to be inorganic and to contain a sacrificial oxidized material.
June 11, 2015
To reduce vehicle weight, automotive manufacturers are using advanced high-strength steels (AHSS) and aluminum alloys, formed at room temperature, as well as hot stamping of boron steels. A few OEMs and Tier 1 suppliers also have started warm forming aluminum alloys, usually 5000 and 6000 series,...
June 11, 2015
Slug pulling in a stamping die can be costly and frustrating. One pulled slug can cripple production. What Is Slug Pulling? When a pierce punch creates a hole, it also produces scrap, called the slug. When the slug sticks to the face of the punch during withdrawal or comes out of the button...
June 10, 2015
Q: The cost of building new progressive dies has gone up substantially in the past few years. I am struggling, and in many cases lose money, on my tool builds. How is the industry expected to cope? A: This is a common problem throughout the metal stamping arena. It’s not easy to remain...
June 1, 2015
A complex stamped component begins its journey as a part print. Then a CAD layout drawing marks the progression; a 3-D model fleshes out the form and indicates any possible interference; and the die is put through a test run before the first part is produced.
May 21, 2015
DieMasters Inc. grew from a small diemaker shop to a 100-employee stamping contractor. The company added value to its bottom by making assemblies, which now comprise 70% of its revenue. The assemblies are a metaphoric representation of the company itself, which makes products diverse in every way possible—size, type, market, materials, complexity. While Diemasters’ success is the result of a concerted effort, President and CEO Virgil DeLay pulls the company together and keeps the band on cue with a well-defined production system.
May 13, 2015
Advancements in robotic technology are extending their functionality and improving their performance. Often a robot is expected to do more than move from programmed position A to position B; it must operate “smarter” and act upon other inputs, such as vision systems or force feedback. The applications for integration of vision systems and robots are almost endless but the most common application is vision guidance for the robot
May 12, 2015
Automotive supplier of seating components Paul Craemer GmbH of Herzebrock-Clarholz, Germany, replaced two presses lines requiring press-to-press automation with one 35-foot tall, 48- by 25-ft. servo transfer press.
April 15, 2015
I get a lot of questions regarding how to maximize the life of progressive-stamping tooling, but no one response fits all. We talk a lot about tooling materials, heat treatment, and coatings. But time and again, stamping lubrication is treated as relatively insignificant. Stampers put little...
April 15, 2015
Q: I have been trying to locate the die maintenance check list printed in a STAMPING Journal® article several years ago, which also included the 10 Tooling Laws. I am hoping you can lead me to it. A: You will find the check list at the end of this article. But even with a maintenance check...
April 14, 2015
Q: How do I define the width of the metal stock required to stamp a part in a new progressive die? A: You need to consider a lot of factors when determining stock width for stamping a part in a progressive die. I assume your question on the stock width is so you can estimate the raw material...