Formation of fume emissions and statistical

analysis of process behaviour

Welding

Brazing and soldering

Bonding

Mechanical joining

Fastening

Mechanical handling

Analysis an characterization of

joints

Process planning

Hybrid joints

Arc welding• Numerical simulation

• Diagnostics

• Process development

• Torch development

Resistance spot welding

Health safety – fume emissions

© WGF 2013

Arc welding processes• GMAW (MIG / MAG)

• Tandem GMAW

• GTAW (TIG)

• CF-TIG (cathode focused TIG)

• narrow groove welding

• Plasma Welding (PAW)

• LA-PAW (laser-assisted PAW)

Automated test stands with diagnostics• High speed imaging and processing

• Oxygen content measurement

• Schlieren measurement

• Particle image velocimetry (PIV)

Fume box and fume analysis

Metallurgic characterization

EquipmentFields of Competence

Kontakt

Univ.-Prof. Dr.-Ing. habil. Uwe Füssel

Institut für Fertigungstechnik

Fügetechnik und Montage

01062 Dresden

Tel.: +49 / 351 - 463 37615

Fax: +49 / 351 - 463 37249

uwe.fuessel@tu-dresden.de

Key Aspects of Research

Fügetechnik und Montage

Joining Technology and Assembly

Process diagnostics

High-speed images with schemes of

current flow and Lorentz force using

different shielding gases (IGF 17.431B)

Process development and application

Fields of research and application in arc processes

Numerical simulation

0.49 mm²

0.4

5 m

m

0,37 mm²1.14 mm²

1.0

0 m

m

feedlea

din

g la

se

r

feedtra

ilin

g la

se

r

laser displacement

Δx = 1 mm

CF-

TIG

Schlieren measurement of fume

extraction torch (in cooperation

with Abicor Binzel)

without fume extraction

with fume extraction

external magnetic

field: 0 mT

external magnetic

field: 10 mT

PIV setup

Arc models

Models for material transfer and weld pool

GMAW

TIG Plasma GMAW GMAW - Tandem

Process models

Plasma - MIG

GMAW processTIG La-PAWTIG

3D-measurement of

shielding gas coverage

Laser-assisted plasma arc welding (LA-PAW) with adjustable

laser spot positioning (DFG FU 307_4-1 und BE 1875_19-1)

1 mm to 10 mm joint of Al-Mg-alloy using LA-PAW process

Welding of 6 mm high alloyed steel 1.4301 using CF-

TIG process in keyhole mode (in cooperation with

Kjellberg Finsterwalde)

400 A 500 A 600 A 700 A

95 cm/min50 cm/min40 cm/min30 cm/min

coil

pole shoe

magnet core

narrow

groove

torch

arc deflection (scheme)

magnet yoke

gas nozzle

coil cooling

electrode

magnetic field

(scheme)

Narrow groove welding torch with magnetic oscillation

device (IGF 16.779 BR)

Narrow groove torch

Cooper

Lambda probe

Narrow groove

contour

Pressure sensor

Lambda

probe

Pressure sensor

Connections to test points

Narrow groove torch

Narrow groove

Copper

Test stand for narrow groove welding

processes – measurement of oxygen

content, energy input and heat flux

Digitalized cross-section and penetration

depending on the shielding gas

CO2Ar

KLB

coldArc

0

10

20

30

40

50

60

70

80

90

100

0,3 0,8 1,3 1,8 2,3 2,8 3,3 3,8 4,3 4,8 5,3 5,8 6,3 6,8 7,3

sh

ort

-cir

cu

it b

rea

ku

p p

ow

er/

%

power during short-circuit breakup / kW

power input while short-circuit breakup

short arc

coldArc

14.0

0.3

85.6

24.0

1.2

74.8

0

10

20

30

40

50

60

70

80

90

100

short circuit transition arc

perc

en

tag

e o

n w

eld

ing

tim

e /

%

process stages

short arc

coldArc

time / s

pow

er

/ W

KLB – short arc

Welding

BrazingArc

processes

Bonding Assembly

organisation

Fastening

Joining by

formingMechanical

handling

Joint analysis /

integrated process

planning

combined joints

simulation and diagnostic