Metal Stamping : Williamsburg Metal Stamping: Deep Drawn Aluminum Can

First part of video shows a Preform Can which is larger in diameter and shorter in height that the final product being formed from a flat blank. The second part shows how this Preformed Shell is reduced in a Reverse Redraw with trimming of flange.

Category:

Science & Technology

Tags:

• Williamsburg
• Metal
• Stamping
• Deep
• Draw
• Can
• Production
• Reverse
• Redraw

[silver760]

Is the sole purpose of drawing these part twice to provide the bottom with a right angled edge at the bottom instead of a radiused edge?

[Metstamper]

@silver760

The true purpose for the 2 operations is that the desired final dimensioned part can not

achieved in one operation because of the ratio of the beginning blank size to the finished diameter, thus a larger diameter preform is drawn and then reverse redrawn to the desired final size. Also incorporated in the final draw is a pinch trim operation that gives the can a finished edge.

[silver760]

Was this press converted from steam driven?It's certainly old enough to have been driven by steam! Mind you the design hasn't changed much in 200 years!! It's great to see such kit still in daily use and hasn't been replaced with "Hydroforming" machines,CNC spinning lathes etc.

[TD227]

@douro20 The first press has a plunger pressure of 80 tons with an 11" stroke and the second press has a plunger pressure of 120 tons with a 15" stroke.

[douro20]

What is the capacity of that press?

[cooldog60]

@nikotinarr I worked in a stamping plant for 38 years. If a press recycles it will take your hand off. And they do recycle. You should never put your hands in a pnch point.

[nikotinarr]

@cooldog60 You can't lose a hand because the machine is actioned with two hands. :)

[cooldog60]

Good way to lose a hand! You could not do that in the stamping plant I worked at.

[Tranixx]

@cooldog60

first time i saw this: oh my got another "machine accident" but the press stops... *pff*

@metstamper:

u should adjust your top-stop angle, in this position its a hard work for the break to stop the ram.

optimal position of stop is 2-4 degrees overun. saves your clutch and brake, also one day the hand of a person.

[qtrmiler1]

If you think this is cool then search for emecinc. Coil feed, fully automated, no wax, finished part every 4 seconds including blank, draw, reverse draw, third draw, wall iron and bottom forming.