Metal Additive Manufacturing of High-pressure Micro-pumps

8/12/2019 Metal Additive Manufacturing of High-pressure Micro-pumps

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METAL ADDITIVE MANUFACTURING

HIGH-PRESSURE MICRO-PUMPS

PRES

MUHAMM

ROLL

GUIDED BY: Mr NEHZEB MOHAMAD


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Micro pumps-What and Why?

Pumps with functional dimension

micrometre range

Miniaturized overall size, potentia

improved dosing accuracy

Rely on micro-actuation principles

low power consumption,fast respo

simple structure.


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Micropumps-two types

Mechanical micropump

need a physical actuator for the pumping

Fluid flow is achieved by oscillatory or

rotational pressure forces.

Non-mechanical micropu

has to transform specific no

energy

electroosmotic, electro-hyd

magneto-hydrodynamic, el

etc.


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Mechanical micro pumps-Parts

Casing

Micro-valves

Diaphrams

actuators


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How a mechanical micropump works?

An actuator is affixed to the diaphragm

Actuation force effects diaphragm

moving

Diaphragm alternately increase and

decrease the pump chamber volume

Fluid is drawn into the pump chamber

during the suction stroke

Forced out of the pump chamber during

the discharge stroke

Mechanical micro-pump w

diaphragm motion


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METAL ADDITIVE MANUFACTURIN

Making a three-dimensional object from a 3Dmodel

CAD designed model is used

The layers from CAD models are automatically

fused to create the final shape.

Ability to create almost any shape or

geometric featureAn ORDbot Q


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Additive Manufacturing in Micropum

Selective Laser Sintering(SLS)

Laser as the power source to sinter powdered

material

Binding the material together to create a solid

structure

Mainly been used for rapid prototyping and for

low-volume production of component parts

Can produce parts from a relatively wide range

of commercially available powder materials


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SLS - PROCESS


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Selective Laser Melting(SLM)

Create three-dimensional metal parts by

fusing fine metallic powders together Typical deposition rates of 530 cm/h

Typical powder particle size of between

10 and 50m

Laser powers of 200W and up to 400W

High degree of geometric freedom

Fully automated one-step manufacturing

Ability to process reactive powders

Very good levels of powder recyclability


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Micropump assembly using SLM

Leak tight laser welding as sealingprocess

Small heat-affected zones and high

heating and cooling rates

Process is automated with roboticmachinery

Have beendesigned and tested

for cooling


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Why SLM and SLS are preferred?

ability to create almost any shape or

geometric feature automatically fused to create the final

shape

high accuracy , detail resolution, good

surface quality and excellent mechanical

properties

Complex geometries and assemblies

reduce materials and waste

Less power required

Quick process


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Additive manufactured micro pumps- Current appl

Low-temperature space applications

Dispensing therapeutic agents

Cooling of microelectronic devices

Micro propulsion

Microfluidic transport requirements

Lubrication systems


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Disadvantages of SLS and SLM

Residual thermal stresses occur resultingin small deformation

dimensional error increases for values

lower than 0.4 mm

porosity cannot be completelyeliminated

Sticking of particles


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Future applications

The study focusing on the development of amicro-pump to operate a two-phase cooling loop

mainly for small satellite applications

considered as high potential for future space

applications and other harsh environments


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References

1) Wessel W. Witsa,*, Sander J. Weitkampa, Johannes van Esb ,Metal

additive manufacturing of a high-pressure micro-pump ,Forty Sixth

CIRP Conference on Manufacturing Systems 2013

2) Farideh Abhari ,Haslina Jaafar and Nurul Amziah Md Yunus 2012*ReviewpaperA Comprehensive Study of Micropumps Technologies

3) Laser D. and Santiago, J., 2004. A review of micropumps, in Journal

of micromechanics and microengineering, pp. R35-R64.

4) Layerwise, 2012. Personal contact and company website,

http://www.layerwise.com, Leuven, Belgium.

5) Sabina L. Campanelli, Nicola Contuzzi,Andrea Angelastro and

Antonio D. Ludovico Capabilitiesand Performances of the SelectiveLaser Melting Process

6) Xin Zhang, Yi Zhao, Biao Li and Daryl Ludlow Journal on Pumping

capacity and reliability of cryogenic micro-pump for micro-satellite

applications


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Thank you

Metal Additive Manufacturing of High-pressure Micro-pumps

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