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Effect of the filling and compaction process on insert weight and quality
2014 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this thesis, the filling and compaction process in Sandvik Coromant’s production of

inserts has been studied with the goal to determine which factors causes weight and

shape variations. The study is based on previous research [1-4] in which the powder

flow and the packing of the powder is studied with a model die shoe filling system.

This study is more complex, taking also the compaction into account and a Fette

MP120 press is used instead of a model.

The factors which were confirmed to affect the final shape of the inserts were the

fill-shoe velocity, the geometry of the die, the morphology of the powder and if a

shaking motion was added to the fill-shoe or not. It was proven that to minimize the

shape irregularities, really high fill-shoe velocities should be avoided. Since different

powders have different flow rates, the fill-shoe velocity should be changed depending

on which powder is being used. The fill-shoe velocity should also be lower for narrow

die geometries since they are harder to fill. Finally, it is good to add a shaking motion

to the fill-shoe because it increases the fill density.

A different type of powder filling was tested called suction filling. This method turned

out to take longer, give the same weight variations between the inserts as the regular

filling method and is only able to be used for less than half of the inserts produced at

Sandvik because it can only fill negative geometries.

Place, publisher, year, edition, pages
2014. , 31 p.
Series
UPTEC K, ISSN 1650-8297 ; 14005
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-224602OAI: oai:DiVA.org:uu-224602DiVA: diva2:717189
External cooperation
Sandvik Coromant
Educational program
Master Programme in Chemical Engineering
Supervisors
Examiners
Available from: 2014-08-06 Created: 2014-05-14 Last updated: 2014-08-06Bibliographically approved

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Materials Chemistry

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