Tag Archive for: Bronze

Mechanical engineers say : 80% of material failure are due to fatigue. What is fatigue? When a mechanical part is subjected to repeated load below ultimate strength but above fatigue limit. In other words : pull the handle once, no problem; pull a thousand times it breaks. That’s what occurred to iron casted handle. The upper ring which forms the pivot is split into two. I will cast a new handle, using the broken one as pattern but with a rebuilt ring carved in the mold.

Crémone0 Crémone1Crémone2Crémone4Crémone5The first run is made of aluminum alloy, a kind of prototype. Final parts are castes in bronze.
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Joseph is carpenter. Manly, he built wooden chairs. Now he can sign his work.

Joseph

From left to right: the pattern, pyrography trial, pyrography stamp

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There is less and less blanks for old keys. When you can’t find one, the best way remains to cast it :

ClefcorseOriginal on the right, copy on the left.

 

Original design by Guillaume Ramillien, architect :

http://www.guillaumeramillien.fr/

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Based on a Sketchup file I order 3D printed patterns of buildings designed by Guillaume. Then, it’s a standard sand molding process.

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Patterns inside a wooden flask, along runner, ready for sand molding

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After bronze pouring

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The parts are mirror finished.

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Everything about this project :  http://www.architecturedudesir.fr/

Winter recipe:

3kg of bronze (CuSn12) – 1kg of butane gaz – lot of fresh air- a pinch of charcoal…

45 min in the furnace, is the soup hot enough ? stir, skim and serve at 1150°C
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