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Size Effect-Enabled Methods

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Micro Metal Forming

Part of the book series: Lecture Notes in Production Engineering ((LNPE))

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Abstract

Micro metal forming requires rather thin parts as the wrought material. Typical thicknesses for sheets are in the range of 10–50 µm. Such sheets can be produced by cold rolling. Common materials, which can be rolled down to such low thicknesses, are for example aluminum (Al99.5), low carbon steel, stainless steel or copper (E58). These materials are available in large quantities at moderate prices. Aluminum foil is for example not only used for the packaging of food but also for thermal insulation, cables and electronics. These materials are work hardened during the cold rolling process and are annealed afterwards to recover their original material properties. All these materials mentioned are rather soft and pliable. This diminishes their potential as construction materials for micro parts.

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Abbreviations

cp :

Heat capacity (J/(kg K))

d:

Diameter (mm)

ES:

Surface energy (J)

F:

Force (N)

kf :

Yield stress (MPa)

l:

Length (mm)

P:

Power (W)

Q:

Heat (J)

q:

Latent heat (J/kg)

r:

Radius (mm)

t:

Time (s)

T:

Temperature [°C (K)]

TD :

Deposition temperature [°C (K)]

TM :

Melting temperature [°C (K)]

u:

Upset ratio (-)

v:

Velocity (mm/s)

V:

Volume (m³)

α:

Absorption coefficient (-)

γ:

Surface tension (N/m)

η:

Efficiency (-)

Φ:

Amplitude (-)

 :

Divergence angle (°)

λ:

Wavelength (m)

ρ:

Density (kg/m³)

θ :

Focus diameter (mm)

σM :

Tensile strength (MPa)

σN :

Nominal stress (MPa)

φ:

Natural strain (-)

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Authors and Affiliations

  1. IWT, Badgasteiner str. 3, 28359, Bremen, Germany

    Heinz-Rolf Stock

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  1. Heinz-Rolf Stock
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Correspondence to Heinz-Rolf Stock , Heinz-Rolf Stock or Heiko Brüning .

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  1. Klagenfurter Str. 2, Bremen, 28359, Bremen, Germany

    Frank Vollertsen

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Stock, HR. (2013). Size Effect-Enabled Methods. In: Vollertsen, F. (eds) Micro Metal Forming. Lecture Notes in Production Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-30916-8_6

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  • DOI: https://doi.org/10.1007/978-3-642-30916-8_6

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-30915-1

  • Online ISBN: 978-3-642-30916-8

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