Stamping Articles

Filter Content

Slug pulling diagram

Die Basics 101: Part XI

December 12, 2006 | By Art Hedrick

Slug pulling is a serious problem in a stamping operation. Addressing the issue requires first understanding why the slugs are pulling. What Is Slug Pulling? When a pierce punch creates a hole, it also produces scrap, usually referred to as a slug. Slug pulling occurs when the slug sticks to the...

Continue Reading

Piercing punch burr

Die Science: Solving punch breakage problems - Part I

December 12, 2006 | By Art Hedrick

Numerous factors contribute to the premature failure or breakage of piercing and cutting punches. Two common factors are operator error and incorrect die cutting clearance.

Continue Reading

Forming lubricants

Lubricant developments for forming high-strength steel

December 12, 2006 | By Paul Bosler Jr.

Forming lubricants always have been a critical component in the metal forming process, but the performance characteristics of these products are even more essential when working with HSS.

Continue Reading

R&D Update: Multipoint-control die cushion systems for stamping complex parts - Part II

November 7, 2006 | By Taylan Altan, Ph.D.

In deep drawing of complex, asymmetrical parts such as stainless steel kitchen sinks, blank holder force (BHF) needs to be controlled locally to regulate the flow of the sheet metal. An MPC blank holder system allows this control by placing individually programmable cushion pins around the blank perimeter, with an appropriate BHF selected at each pin location.

Continue Reading

stamping die change

10 common quick die change problems

November 7, 2006 | By Paul Van Every

Die changeover is one of the few times when a press isn't making money. Why do some die changeovers take hours? It might be the press, operator, die, material, lift truck, crane, or the tools.

Continue Reading


Multipoint-control die cushion systems for stamping complex parts - Part III

November 7, 2006

With constant BHF, conventional steel sheets can be formed with few tryouts. However, with the increasing use of lightweight materials and high-strength steels with low formability, there is a need for precise, localized control of metal flow using MPC systems.

Continue Reading

Lathe turning diagram

Draw forming, Part V

November 7, 2006 | By Edmund Herman

The remoteness of the energy-affecting elements contributes to the differences between the net shape and non-net shape processes. This additional difference helps drive the nature of the net-shape processing theory.

Continue Reading

Die Basics 101

October 10, 2006 | By Art Hedrick

Editor's Note: "Die Basics 101" is a 17-part article.

Continue Reading

Transfer technology

October 10, 2006

Venest Industries, an automotive parts supplier based in St. Catharines, Ontario, Canada, needed an automated transfer system that could be parked away from the machine bed during progressive operations and die changes, so that new dies could be delivered to the press via an overhead crane.

Continue Reading

Die Basics 101: Part X

October 10, 2006 | By Art Hedrick

Cutting is the most severe metalworking process that takes place in a die and shouldn't be taken lightly. Cutting Basics Cutting metal requires great force. For example, it takes approximately 78,000 lbs. of pressure to cut a 10-in.-diameter blank from 0.100-in.-thick mild steel. Consequently,...

Continue Reading

Drawing on new experiences

October 10, 2006 | By Dan Davis

In the past metal forming in the appliance industry meant giant presses with expensive tooling. Lead-times were forever, and change didn't come easy. Whirlpool Corp. in Fort Smith, Ark., is taking a new approach to metal forming, and flexible technologies are the key.

Continue Reading

Ask the Stamping Expert: Overcoming deformity by design

October 10, 2006 | By Thomas Vacca

Achieving typical goals in stamping, such as zero development and fewer labor requirements, is made easier when the progressive die strip is kept level through the entire progression. Keeping the strip level can eliminate wave problems caused by incorrect pilot/lifter use occurring in punch forming.

Continue Reading

Die Science: Setting up progressive dies - Part II

October 10, 2006 | By Art Hedrick

Proper feeding, scrap removal, and shut height calibration are essential for good die setup.

Continue Reading

Multipoint-control die cushion systems for stamping complex parts - Part II

October 10, 2006 | By Ajay Yadav

Editor's Note: This article is Part II of a three-part series that discusses multipoint-control (MPC) die cushion systems applied to the forming of stainless steel double sinks. Part I, which appeared in the September issue, discussed novel press and design concepts using MPC systems. Part III,...

Continue Reading

Die Science: Setting up progressive dies - Part I

October 3, 2006 | By Art Hedrick

Editor's Note: "Setting Up Progressive Dies" is a two-part article. Part I discusses press and die cleanness, die alignment, clamping procedures, and preliminary shut height calibration. Part II discusses the process for getting metal into the die, setting the pitch, feed release, and other factors...

Continue Reading