Stamping Articles

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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R&D Update: Controlling material flow in drawing operations

June 17, 2016

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The researchers at The Ohio State University's Center for Precision forming perform research on controlling material flow in drawing operation using CNC hydraulic cushions to help improve drawability.

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Reading progressive die strip — Part II

June 16, 2016

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Editor's Note: This is the second part of a two-part article about reading progressive-die strips. Part I, which appeared in the May issue, covered the causes of pilot hole distortion and mismatched cuts. Hard marks, otherwise known as coin marks, occur when metal is severely squeezed between two...

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Die Science: Developing forming dies - Part III

June 16, 2016

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Editor's Note: This is third installment of a three-part series that discusses die development for producing nonuniform, contoured parts by breaking the process down into eight steps. Part I covers the part material, its form, and its function. Part II discusses length-of-line analysis and tip...

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Die Science: Developing forming dies - Part II

June 16, 2016

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Editor's Note: This is first installment of a three-part series that discusses die development for producing nonuniform, contoured parts by breaking the process down into eight steps. Part I covers the part material, its form, and its function. Part II discusses length-of-line analysis and tip...

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Die Science: Solving punch breakage problems - Part III

June 16, 2016

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Numerous factors contribute to the premature failure of piercing and cutting punches. In addition to problems with the punches, such as tool steel or problems caused by EDM and grinding, the press can cause problems through deflection, and bridge strippers also can cause punch breakage.

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Die Science: Designing dies 2-D or 3-D?

June 16, 2016

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Both 2-D and 3-D die design packages have advantages and disadvantages, which are discussed here, but true success lies in the designer's ability, not the software's.

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Die Science: Fundamentals of drawing

June 8, 2016

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Columnist Art Hedrick goes back to basics about drawing, offering a comparison of drawing and casting, an explanation of flow and control.

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Ask the Stamping Expert: Five essential stamping rules for component designers

June 7, 2016

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Over the years I have received many requests from readers asking for suggestions and advice for particularly challenging stamping applications. Some of the issues can be addressed through creative tool design; some can’t. Some stampings by design make it virtually impossible to satisfy all the...

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Ask the Stamping Expert: Is it necessary to balance a die in a press?

May 31, 2016

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Q: I always try to balance my single-stage and progressive dies in our presses. However, with some new dies coming in, I have no room to move them in the press to a balanced condition. Is it necessary to balance a die in a press? A: To give you a better understanding of the subject, we should...

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Ask the Stamping Expert: How can I increase press speed without constant production stoppage

May 31, 2016

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Dennis Cattell advises that the centerlines of the press, bolster, feed, straightener, and reel might not be in line and the coil material guide settings might not be correct.

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Ask the Stamping Expert: How can we form holes smaller than the material thickness?

May 31, 2016

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Q: We are using a progressive die to make a part that is 3.770 inch in diameter with 45 holes, each 0.172 in. in dimeter, on a 3.514-in. bcd [basic center diameter]. Our customer has asked us to change the material from 0.080-in. half-hard copper to 0.240-in. half-hard copper. Now the hole is...

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Ask the Stamping Expert: How can I avoid die crashes?

May 31, 2016

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Q: I am a die setter and press operator who works with progressive dies that run up to 120 SPM. For die and press protection, we have: Strip material location with pilots. Pilot protection with limit switches. Four double-material-thickness stripper sensors in case of slug pull-up. Sensor on...

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Ask the Stamping Expert: How can I prevent slivers in blanking operations?

May 27, 2016

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Q: We are making shallow drawn cuts from 0.007-inch-thick aluminum base material with a thin polymer coating. The cups are assorted sizes from 0.375 to 0.75 in. and equal depths. We pierce the blank and use a balentine to carry it in the strip web through the draw operations, and finally we...

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Ask the Stamping Expert: Do we really need die safety blocks for die setting?

May 27, 2016

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Dennis Cattell answers this question with a resounding "Yes!"

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Optimizing hydraulic presses for deep drawing

May 25, 2016

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Optimizing a hydraulic press requires choosing the best press frame, hydraulic circuit, auxiliary function, electrical controls, and hmi for your deep drawing application and parts drawn.

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