Kinetic energy and the Sheet Metal Stamping

Let’s try to use Kinetic energy to understand and improve reliability on sheet metal stamping dies.

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Kinetic Energy

Where:

• KE = kinetic energy
• m = mass of a body
• v = velocity of a body

?The same formula is used to calculate the impact energy.

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Now, as the grade of the sheet metal strip increases, or as the thickness increases, the cutting effort increases.

So imagine a high strength steel with 5,0mm thickness as a concrete wall, and mild steel with 1,0mm thickness as a wood wall.

?With which option the cutting punch will suffer more?

As in a car accident, if the moving object is unable to move the stationary object, all the energy will be wasted in destroying one of the objects.

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Crashes at various speeds Summary Physics of Car Crashes

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So let’s compare 3 scenarios, with the same material, but with different press parameters (stroke rate, stroke length), stroke rates increasing and stroke lengths decreasing.

• Material thickness 3,0mm
• Impact 1,0mm before end of the press stroke

From scenario 1 to scenario 3 the production rate increased 100%, but the impact energy increased only 30%.

From scenario 1 to 3, the maximum linear speed decreased 30%, so the gas springs won't heat up as much.

Conclusion:

Decreasing stroke length on sheet metal stamping is beneficial for tool life and reduced maintenance costs. And will allow increase production speed.

#productivity ;#processimprovement