metrom 2015 en - gefertec.de€¦ · • connection is done by special elements to avoid tension as...

Überscrift

20.04.2015 metrom.com

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Optimum solution - Icosaeder structure + Pentapod kinematics

www.metrom.com

Stiffness of the structure

Force of the ball screws driven by direct hollow

shaft drives

Precision by cardan joints and mathematical

transformation

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• Direct drives –highdynamic accuracy of10m/s²

• 5 identical precision ballscrews

• Only longitudinal forcesin the ball screws

• Tough frame design

• modules form a clevermachine concept

• Complete thermalmanagement in machineby hollow shafts andframe as passive cooler

Parallel kinematics

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Robots with the stiffness and accuracy level of Machining centers

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Machining centre

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Configuration possibilities

mobile machine gantry-machine

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Compounds for aircrafts

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What we mainly did – milling of all kind of materials

Hard Milling 62 HRC vane production

Tool and Die making

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Laser welding, milling and friction stir welding in one

machine


Laser-Milling-FSW Hybrid-machine

Exchangeable tool in HSK- adapter

source:Fraunhofer IWS Dresden

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Applications – Additive Manufacturing of plastics

Material PA6-CF (40% carbon fiber content)

Feed rate 900mm/s, Layer height 0,4mm, 5kg/h, nozzle diameter 1mm

Direct printing of reinforcements on workpieces or fixture modification

source:Fraunhofer IWU Bautzen

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applications – hammer peening of surfaces

• NC-controlled surface finish to reduce theroughness by a factor 10 according to baseroughness (down to Rz 0,5)

• Creation of lubrication pockets

• Reduction of internal tensions

• Increase of surface hardness

• Pneumatically driven by air spindle supply

• Currently in development with Fraunhofer IWUas adaptive piezo-electric actuated tool withadjustable resonant frequency up to 700Hz

source: Fraunhofer IWU Chemnitz

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Success since 2008 – Mobile 5-Axis Milling Machine

• Removal of cracks between fir-tree grooves

• Shortened repair time due to machining on site

• Faster process than cutting the segments, lasercladding + heat treatment

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„Kranich 800“ - Worldwide Use in Electrical Power Stations for GE Power AG

• There needs to be a referenceaccording the part to allow forprocessing

• Sample application:

• middle axis of the parts is identified

• the part is turned within a fixturefrom one position to the next

• for rotational symmetrical parts(e.g. processing of rotors)

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Mobile 5-Axis Milling Machine - Transportation

Transport in air cargo container

Transport inside the factory

Transport by truck

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• The ground or workpiece itself can be used as machine foundation

• The frame is fixed stiff at three points with this foundation

• Connection is done by special elements to avoid tension as tensions would impact machine accuracy

• no higher accuracy requirements according this three points

Three base points

Concept for mobile processing

- installation

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• 3D- position teaching of workpiece realgeometry as a net of points according to thereference given

• Workpiece final geometry as target to fit thereal geometry inside and alignment ofcoordinate system

• Correlation between the machine andworkpiece is done by rotation around threemain measured points to find the angular andpositional orientation of machine coordinatesystem according to its current position atthe workpiece

• Either a rotary device or a positioning systemis used for movement of the machine

Strategy for mobile processing

- Global accuracy

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Measurement of machine to workpiece…

milling… drilling tapping…

• Setting up to the workpiece and furthermovement of the machine by constantlyremaining in workpiece coordinates with lasertracker and precise processing

mobile machine – Wind energy

Positioning… Milling, drilling, tapping…

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Why is a Pentapod better than a robot for machining?

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• Full working envelope accuracy ofmovement +/-0,25mm, repeatability0,06mm

• Best available system with laser guidance+/-0,15mm (offline teaching with influenceon cycle time)

• stiffness depending on arm position ->during machining in different speeds thepath offset is between +/-0,25mm(230mm/min) and +/-1,5mm(7900mm/min)

• High costs to enable off the shelf robot forthat approach (Laser tracker necessary)

• Full working envelope accuracy ofmovement +/-0,02mm, repeatability0,003mm laser guidance not necessary inworking envelope!

• Highest available stiffness

• Optimum relation of cost to use

Serial kinematic Parallel kinematic

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Workspace –

mobile machine

workspace in mm diameter Z

PM800 800 400

PM1000 1000 600

PM1400 1400 800

PM2000 2000 1000

Accuracy full working area

Approx. ±0,020mm

repeatability 0,003 mm

• Other workspace sizes available per request

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METROM –PM100 (small mobile machine) finished in 2018


• Size without struts:

500mm x 500mm x500mm

• Working envelope 5-axis:

– 100mm diameter

– 100mm in z-axis

• weight: < 100kg

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Advantages:

• High material build-up rate up to 600cm³/h

• Easy process that is completely independent from movement direction

• Welding in PA and PC-position possible

• Easy to integrate, easy to use! www.metrom.com

Hybrid Manufacturing powered by 3DMP®

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Machining center

Concept –

mobile to

machining center and backwards

mobile horizontal

Mobile vertical

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METROM Mechatronische Maschinen GmbH

METROM Mechatronische Maschinen GmbH

Schönaicher Str. 6 - 09232 Hartmannsdorf -

GERMANY

Contact: [email protected]

Phone +49 3722 59 863 -12

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New possibilities for creative engineers!

metrom 2015 en - gefertec.de€¦ · • connection is done by special elements to avoid tension as...

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