Sheet metal cutting with fiber lasers - Swissphotonics · PDF fileSheet metal cutting with...

Sheet metal cutting with fiber lasers● About Bystronic● Introduction● Results and Discussion● Results and Discussion● Summary

Andreas Lüdi and Stefan WittwerBystronic Laser AG

B t i K FiBystronic: Key Figures

• Established in 1985• Established in 1985

• Field of activity: Sheet Metal Processing Metal Processing Systems

Headq arters• Headquarters:Niederönz (CH)

Si 1994 t f th • Since 1994 part of the Conzzeta Group

• Sales 500 mio. € (2008)

• Employees 1627

© 2009 BystronicSwisslaser.net Workshop Burgdorf 2009 26.11.2009, Folie 2

B t i C A ti itiBystronic: Core Activities

L W t j t Laser Cutting Bending

Waterjet Cutting

• Process chain: cutting - bending

• All from a single source• For all flat materials and

Handling & Software & Services &

all shapes

Automation Control Support

• Automation of the complete mate ials and complete materials and data flow

• For increased productivity


and cost efficiency

I t d ti /M ti tiIntroduction/Motivation

Wish list for a laser cutting system

Cost effecti e

CO2 fiber

☺• Cost-effective

• Reliable autonomous operation

• Energy-efficient

☺☺ ☺

☺Energy efficient

• Compact layout

• Simple operation

☺☺☺• Little maintenance

• Continuous high output

Good cut quality

☺☺ ☺

• Good cut quality

Source: PM By


O ti fi tiOptic configurations

dFiberfC

dFocus=(fF/fC)·dFiber

several optic configurations

350

400

450

um

]

6975100

150 µm

fC [mm]

200

250

300

dia

mete

r [u 100

fF

100 µm

50

100

150

200fo

cal

dFocus

50 µm


50100 120 140 160 180 200 220

focal length [mm]

dFocus

focal length fF [mm]

C tti lt 2005 Al iCutting results 2005: Aluminum

Aluminium SpeedAluminium

16000

18000

IPG

Bylaser2200

Speed

> 4mm similar to 2 kW CO2

< 4mm faster than 5 kW CO2Fiber 2 kW

CO2 2 kW

Fiber 2 kW

CO2 2 kW

8000

10000

12000

14000

(m

m/

min

)

y

Bylaser4000

Bylaser4400

Bylaser5200

Q lit

CO2 4 kW

CO2 4.4 kW

CO2 5 kW

ng s

pee

d

2

CO2 4 kW

CO2 4.4 kW

CO2 5 kW

2000

4000

6000

8000

Vo

rsch

ub Quality

Similar to CO2. Cutt

in

0

2000

1 1.5 2 3 4 5 6 8

Dicke (mm)Thickness [mm]


C tti lt 2005 St l (O )

Baustahl

Cutting results 2005: Steel (O2)

SpeedBaustahl

8000

9000

10000

IPG

Bylaser2200

Bylaser4000

Speed


< 5mm similar to 5 kW CO2

Fiber 2 kW

CO2 2 kW

CO2 4 kW

5000

6000

7000

b (

mm

/m

in)

Bylaser4000

Bylaser4400

Bylaser5200

Quality g s

pee

d

2

CO2 4.4 kW

CO2 5 kW

2000

3000

4000

Vo

rsch

ub Quality

< 6mm very good

> 6mm good

Cutt

ing

0

1000

1 2 3 4 5 6 8 10 12 15 20

Dicke (mm)Thickness [mm]Dicke (mm)Thickness [mm]


C tti lt 2005 St i l t l

Edelstahl

Cutting results 2005: Stainless steel

Edelstahl Speed

11000

12000

13000

14000

IPG

Bylaser2200

Bylaser4000

B l 440011000

12000

13000

14000

IPG

Bylaser2200

Bylaser4000

B l 4400

Speed


< 4mm faster than 5 kW CO2

FaserlaserFiber 2 kW

CO2 2 kW

CO2 4 kW

CO 4 4 kW

7000

8000

9000

10000

b (

mm

/m

in) Bylaser4400

Bylaser5200

7000

8000

9000

10000

b (

mm

/m

in) Bylaser4400

Bylaser5200

Qualityng s

pee

d

CO2 4.4 kW

CO2 5 kW

3000

4000

5000

6000

Vo

rsch

ub

3000

4000

5000

6000

Vo

rsch

ub Quality

Rather rough cut,

worse than CO2

Cutt

in

0

1000

2000

1 1.5 2 3 4 5 6 8Dicke (mm)

0

1000

2000

1 1.5 2 3 4 5 6 8Dicke (mm)Thickness [mm]Dicke (mm)Dicke (mm)Thickness [mm]


C tti lt 2005 St i l t lCutting results 2005: Stainless steel

fiber laser: 4mm stainless steelrough cut; Rz ~ 30 µm (lower region)

fiber

CO2 laser: 4mm stainless steelsmooth surface with Rz < 10 µm

CO2

Rz<10 µm

CO2


C tti ibiliti Fib CO2Cutting possibilities: Fiber vs. CO2

Fiber laser cuts fasterG d t lit l ith

N2 Comparable cut quality of fiber- and CO2-laser

Good cut quality only with CO2-laser

Comparable cutting speed of CO and fiber laser O2 Comparable cutting speed of CO2 and fiber laser

Comparable cutting quality of CO2 and fiber laser

5mm - 20mm1mm - 5mm© 2009 BystronicSwisslaser.net Workshop Burgdorf 2009 26.11.2009, Folie 10 comparison with equal optical power / Source: Optech Consulting, 2009

Sit ti t dSituation today

Today most fiber laser cutting machines are Today, most fiber laser cutting machines are used for thin sheets.

-ByVention Fiber 2 kW2007 Munich(presented on Laser 2007 WORLD

OF PHOTONICS, Munich)

-several fiber laser cutting machines have beenpresented on Euroblech 08 Hannover


presented on Euroblech 08, Hannover.

h t i t lit an approach to improve cut quality

Laser beam

a.U

.]rp

tion [

aAbso


Angle of incidence v [deg]

A l f i idAngle of incidence

Laser beam Laser beam Laser beam

Dsheetsheet

v i =Dsheet

Dtan-1( )


vmin DLaser beamta ( )

A l f i id h t thi kAngle of incidence: sheet thickness

]on [

a.U

.]Abso

rpti


v i =Dsheet

Dtan-1( )


vmin DLaser beamta ( )

A l f i id b tiltiAngle of incidence: beam tilting

85Blechdicke=4mm, Durchmesser Strahl=0.4 mmDsheet=4 mm, DLaser=0.3 mm

84 8

84.9

84.7

84.8

wdeg

]

84.5

84.6

Win

kel

Angle

v [

d

84.3

84.4

70 75 80 85 90 95 100 184.2

Winkel aAngle a [deg]


A l f i id l t d bAngle of incidence: elongated beam

U.]

ption [

a.U

Abso

rp

D



vmin=Dsheet

DLaser beamtan-1( )

A l f i id f l itiAngle of incidence: focal position

Extreme focal positionp

U.]

ption [

a.U

Abso

rp



C t lit i tCut quality improvements

Standard cut (@2kW) Cut with extreme focal position (@2kW)

26.1 µm 16.9 µm

6m

m

47.3 µm 21.7 µm

301;

D=

6

70.2 µm 28.0 µm1.4

3

Reduced burrsReduced roughness


Reduced roughness

SSummary

- 1µm lasers have inherent disadvantage concerning fusion cutting of thick sheet metals [a

.U.]

concerning fusion cutting of thick sheet metals (and v.v. concerning thin sheet metals)

Abso

rption

- Improvements of cut quality can be achieved Angle of incidence v [deg]

by improved incoupling of laser radiation

Thank you for your attention


Sheet metal cutting with fiber lasers - Swissphotonics · PDF fileSheet metal cutting with...

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