the aser emote technologylr - sef.de · focus lens: with the help of the focus lens the beam will...

Basics • Delivery range

The aser emote TechnologyL R

L Raser emote • Basics

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Working space model

Core part of our Laser Remote system, short form LR, is a high dynamic laser beam deflection kinematics for different

working space sizes in 3D respectively 3D plus 4th additional axis for extension of the working space.

The drives consist of high dynamic linear motors, which are constructed as so called rotary tables for circle movements.

The regulation takes place by using high-resolution absolute encoders of the EnDat-family from the company

Heidenhain.

The z-positioning in our systems occurs by moving the focus lens. The used focal distances require a previous conditio-

ning of the laser beam.

Initially this was realised by using a reflective acting telescope. The following focussing took place by a transmissive

acting lens. Nowadays both functions are combined by using a so called focus telescope which is mainly used in combi-

nation with CO2-lasers. This focus telescope offers the additional advantage, that it has no focus shift like a transmissi-

ve focus lens at higher laser power.

Maybe you already know our LR-technology already

under the trade name RWS of our OEM partner Rofin

Sinar.

Already at the beginning the CO -lasers provided the 2

necessary beam quality for a remote application. In the

meantime there are also disk and fiber lasers with high

beam quality and necessary laser power available.

By an easy exchange of the optical components in our sys-

tems, they are capable of all 3 laser sources. Thereby the

beam moving system is always the same and available in

3 different working space lengths (max. 1,25 m; 2,0 m

and 2,85m). The working space width is always max.

1,4m. The systems include our

proven focus finder function

for easy teach-in program-

ming.

The optional use of quality sys-

tems as offered by Precitec or

Plasmo, is considered con-

structional. For the realisation

of a quick safety circuit for fiber

lasers (for example during

work piece change), we offer

an optional beam trap which

can be integrated in our LR-

boxes.

Based on our RS robot controllers and the experience of

several thousand uses in the field, we nowadays offer the

SC 3 controller generation with the corresponding teach

panel TP 3 which meet the special requirements of the LR

kinematics.

The SC 3 controller operates the newest requirements

regarding safety and customer wishes with the usual easy

operation. In addition to our proven software tools like

oscillation or compilation of relative subroutines into pro-

cess optimal absolute programs, we implemented seve-

ral improvements. As examples we like to mention the ten

times extended program storage and a considerable sim-

plified safety integration.

L Raser emote • Delivery range

LR 2LR 2 Fiber, Disk, Co2


LR 1

LR 3


position of working mirrorVariable

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LR 1LR 1 LR 1 Disk

LR 1LR 1 Fiber

LR 1LR 1 CO2

Dimensions (lxwxh) approx. 1700x800x700 mm

Weight LR 1 SC 3

approx. 450 kg approx.. 100 kg

Connection values 230/400 VAC 50 Hz 3x16 A

Cooling system LR 1 Air- and water cooling

Cooling system SC 3 Air cooling

Number of axes 3 linear motors

Environment conditions Temperature Air humidity (no condensate)

+10 up to +40 °C

90% at 20 °C 50% at 40 °C

Point repeat accuracy ±0,1 mm

Theoretical x/y - positioning velocity

100 mm / 50 ms (approx. 2 m/s)

Technical data

LR 1 1250 mm

LR

1 1

40

0 m

m

focal distance f: 1600 mm

z -level: 1090 mm0

example of working depth z: 200 mm

Example

Working area LR 1

Y

X

Z


LR 2LR 2LR 2 Disk

LR 2LR 2 Fiber

LR 2LR 2 CO2

Technical data

LR 2 2000 mm

LR

2 1

40

0 m

m


z -level: 1090 mm0


Y

X

Z


Weight LR 1 SC 3







+10 up to +40 °C

90% at 20 °C 50% at 40 °C




Example

Working area LR 2

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LR 3LR 3 LR 3 Disk

LR 3LR 3 Fiber

LR 3LR 3 CO2

Technical data

LR 3 2850 mm

LR

3 1

40

0 m

m


z -level: 1090 mm0


Y

X

Z


Weight LR 1 SC 3







+10 up to +40 °C

90% at 20 °C 50% at 40 °C




Example

Working area LR 3

L Raser emote • Components

Laser sources

The used laser sources also differs because of the requirements of the special application:

Type

Manufacturer

Wave length

Application

Optics

CO

2C

O2

Deflection mirror: CuMo (Copper/Molybdenum)

Focussing: Lens ZnSe (Zinc/Selenide) or mirror Cu (Copper)

Telescope: Reflector with copper mirros

CO Slab2

Rofin-Sinar Laser

10.600 nm

Plastics processingat 1.500 - 2.500 W

Weldingat 3.000 - 6.000 W

Fiber laser (Fiber)

IPG

1.070 nm


Disk laser (Disk)

Trumpf

1.035 nm


Deflection mirror: Quartz glas

Lens: Quartz glas

Collimator: Quarz glas lenses (transmissive)

Protective window: Quartz glas NEW

Type

Manufacturer

Wave length

Application

Optics

Yb

Yb

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L Raser emote • Optical components

Optical components for fiber- / disk laser

Collimator: For a later optimal focussing of the beam, it is first necessary to widen and

to parellelize the laser beam. For fiber- and disk lasers this happens with the help of a 3”

collimator.

Focus lens: With the help of the focus lens the beam will be focussed to a spot diameter

of 0,6 mm (at f=1600 mm / 100 µm working fiber). For fiber- and disk lasers a focus lens

made of quartz glas is used. Since the focus lens is moveable, it is also possible to weld

3-D parts.

Deflection mirror: The deflection mirror deflects the laser beam with the help of quick

linear rotary tables within the available working area. The deflection mirror is also made

of quartz glas.

Protection window: For the first time the wave length of a fiber- /disk laser allows the

use of a protection window. This protects the interior room and with the help of additio-

nal clean purge air it allows the protection of the sensitive optics.

Optical components for CO -laser2

Telescope: For CO - lasers the widening of the laser beam is done with the help of a 2

telecope in which several mirrors are arranged.

Focus lens: Because of the different wave lenghts of the laser sources the focus lens for

a CO is made of zinc selenide. The focussed spot has a diameter of approx. 0,9 mm (at 2-

f=1600 mm).

Deflection mirror: The deflection mirror for a CO -laser consists of a molybdenum 2

coated copper mirror.

Protective window: We refrain from using a protective window because the wave length

of a CO -laser would allow the use of a protective window made of zinc selenide only.2

L Raser emote • Optical Components

Alternatively to the usual transmissive focus optics our laser remote systems can be also equipped with reflective focus

optics. Especially when working with higher laser power. These optics can avoid the focus shift mostly which is caused

by thermal changes of the usual focus lenses. This effect is a little bit stronger at zinc selenite lenses which are used in

systems operated with CO2-lasers than at the quartz glass lenses which are used in systems operated with fiber- or disc

lasers.

In systems with CO2-lasers we use a Kugler mirror focus head

which replaces the telescope for beam widening as well as the

zinc selenite lens. The mirrors in the focus head work with a

stable working point which is achieved by water cooling. The

housing unit is flushed by clean air to avoid pollution of the inner

housing.

In systems with fiber- or disc lasers the mirror focus head

replaces the usual quartz glass lens. For the beam widening the

usual transmissive collimator is replaced by a reflective

collimator, also manufactured by the company Kugler.

The mirror focus head can be supplied with different focal

distances so that the previous working spaces can be kept.

According to the used laser source, the mirrors inside the focus

head can be supplied with different coatings. This is usually

molybdenum for CO2-lasers or hard gold for fiber-/disc lasers.

Option reflective focus optics

Collimator - KUGLER

Mirror focus head - KUGLER

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L Raser emote • Optical components

Laser Remote Welding - beam guidance

CO -laser2

Mirror focus head

aspherical cutdeflection mirror

Scanner mirror

work piece

possibly

beam

switch

YLR

LASER

Fiber- / Disk-Laser

Mirror focus head

mirror collimator

Beam guidance with reflectiv optics using the example of CO -lasers 2

Beam guidance with reflectiv optics using the example of fiber- / disk-lasers

work piece

aspherical cutScanner mirror

L Raser emote • Applications with CO -Laser2

Pitch test plastic plate

Pitching (laser drilling) of a plastic plate in a

laser remote system with a 4,5 kW CO -Slab 2

laser.

Laser Remote Welding

Laser Remote Pitching

Welding of practical parts in a laser remote

system with a 3,5 kW CO -Slab laser.2

Equipment RWS 3.1

Laser Rofin Sinar DC035

Laser power 3,5 kW (10.600 nm)

Material thickness 0,8 on 1,2 mm steel

Welding velocity 45 mm/s (2,7 m/min)

Oscillating seam ja (1/4/20)

Process gas filtered cabin air

Top v wie

Practical tests

Bottom side

Welding test instrument board carrier

Process parameters

In our application hall we offer now the possibility, to make tests with a 4,5 kW CO -Laser as well as with 2

a 4,5 kW fiber laser. So you have a direct possibility of comparison and therewith a decision support for

the choose of the best laser source for your application.

Customer tests

Pitch test plastic plate

Process parameters

Equipment RWS-C

Laser Rofin Sinar DC045

Laser power 2 kW (10.600 nm)

Material thickness 3 mm plastic

Number of pitching holes 504

Over all cycle time 20 s

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L Raser emote • Applications with Fiber-Laser

Equipment LR 2 Fiber

Laser IPG YLR 2000

Laser power 2 kW (1070 nm)

Material thickness 1 on 3 mm steel

Welding velocity 15 mm/s (0,9 m/min)

Oscillating seam Yes (1/4/20)

Process gas Compressed-air 2 bar

Top side

Bottom side

Process parameters

Practical test

Welding of practical parts in a laser remote

installation with a 2 kW Yb-fiber laser.

Laser Remote Welding

Comparison fiber laser / CO -laser2

Fiber laser CO2-laser

Laser YLS-4500 DC 045

Laser power 4600 W 4500 W

RWS-type LR 3 RWS-LS

Focal distance 1600 mm 1600 mm

Fiber laser CO -laser2

Material DC 04

Material thickness 2x 1 mm

V=120 mm/s V=60 mm/s

Top side

Bottom side

Top side

Bottom side

Material DC 04

Material thickness 3x 1 mm

V=80 mm/s V=45 mm/s

Top side Top side

Bottom side Bottom side

L Raser emote • Components

Controller

Working areas

SC 3SC 3Controller

TP 3TP 3Teach Panel

The continous working area is realized by a continuous

movement of the working mirror.

The divided working area is reached by the movement

to two fixed end positions which will be checked with

the help of two safety switches and which are available

for the resource controller. The divide working area is

only possible for the laser remote module LR 3 by

optional assembly. Under the observance of safety

relevant regulations we get two working areas by this

way. In one working area it is possible to weld while the

other working area can be loaded by a worker.

Continuous working area Divided working area

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The modular concept of the LR-

family offers an easy realization of

various applications.

Following you will see the view of a

general installation scheme as well

as some examples of possible

appli-cations.

On the left side you see our LR-laboratory

installation which is operated with a Yb- fiber

laser.

With this installation of an

automotive supplier which

was put into operation in

2004 , each day 1 .200

c o m p l ex c o m p o n e n t s ,

consisting of 11 single parts,

a re w e l d e d i n 3 - s h i f t

operation, which means at

least 64.000 welds per day.

LR-Module

Laser source

Zellenluft-(Prozess-)

behandlung

Zellenluft-(Prozess-)

behandlung

Cell air and

process air

treatment

Air

preparation

(for CO2)

Recooling for

laser and

optical components

Laser

controller

Resource

controller

SC 3

Controller

TP 3TeachPanel

TP 3TeachPanel

TP 3

Teach

Panel Your

application

Safety enclosure

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L Raser emote • Installations

L Raser emote • Application samples

LR 2 mit 4,5 kW Faserlaser

Microsections for a quick

evaluatiion of the welding result

Casted microsections fordocumentation purposes

In our applications hall we offer the possibility to perform some welding tests previously planning a possible

welding system.

Our 4,5 kW CO2-laser can be used for welding samples as

well as for series production.

For prototyping we have a number of different grips available to fix the work pieces.

For small-lot production it is better to use laboratory clamping devices with toggle clamps which you can bring

with you, if available, or which we can manufacture for you.

For bigger series production it is necessary to use applicable hydraulic or pneumatic clamping devices.

If you don't have such a clamping device so far we could place contact to some partner companies which can

develop and quote a clamping device for you.

In addition to the performance of welding tests it is

also possible to use the available test systems for

prototyping or small-lot production. If there is already

experience with our systems this can be done by your

own staff or by SEF staff as a service.

For a detailed documentation a polished specimen

will be prepared as follows:

! Detaching a small part of the work piece

! Casting of this part

! Generation of vacuum to avoid air blowings in the

casting compound

! Grinding and polishing the specimen with 5

different grits

! Etching of the specimen

The result of this evaluation is available within 24-48

hours.P

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SEF Systec GmbH

Kringelsburg 2a

21379 Scharnebeck

GERMANY

Tel.: +49 (0) 4136 909-0

Fax.: +49 (0) 4136 909-22

[email protected]

www.sef.de

July 2013 R06

the aser emote technologylr - sef.de · focus lens: with the help of the focus lens the beam will...

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