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Die Science: Developing forming dies - Part III

June 16, 2016 | By Art Hedrick

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 | By Art Hedrick

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 | By Art Hedrick

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 | By Art Hedrick

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 | By Art Hedrick

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 | By Thomas Vacca

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 | By Dennis Cattell

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 | By Dennis Cattell

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 | By Thomas Vacca

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 | By Dennis Cattell

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 | By Thomas Vacca

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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Optimizing hydraulic presses for deep drawing

May 25, 2016 | By Greenerd Press & Machine Co.

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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Lockset manufacturer gets handle on scrap to boost productivity

May 25, 2016 | By Kate Bachman

When you stamp 2.2 million pieces a day in the manufacture of lockset and doorset assemblies— 550 million stampings a year—smooth, speedy operation is your goal and bottlenecks and obstructions to productivity are your targets. Kwikset developed a unique way to handle scrap that removed a bottleneck and increased output.

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Making metal forming math more meaningful

April 25, 2016 | By Bill Frahm

In the world of metal forming, relying on assumptions can lead to expensive disasters. That’s why activities such as die tryout need to be based on solid math. The results of these mathematical efforts then need to be shared in a language that decision-makers can understand.

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