Laserschweißen im Mikro- Reaktor-/Reformer-Bau

2021 ◽  
Vol 111 (11-12) ◽  
pp. 869-871
Author(s):  
Thomas Klotzbücher ◽  
Torsten Braune ◽  
Ingo Spitzer ◽  
Christian Hofmann
Keyword(s):  
Tailored Blanks

Das Laserschweißen ist eine seit Jahren etablierte Technologie in der Aufbau- und Verbindungstechnik, getrieben unter anderem auch durch die breite Verfügbarkeit moderner Laserstrahlquellen, die mittlerweile in vielen industriellen Anwendungen, wie zum Beispiel beim Schweißen von Tailored Blanks in der Automobilindustrie, zum Standard geworden ist. Die Vorteile der Technologie liegen auf der Hand, formtreue Verbindungen und geringe Wärmebelastung der Bauteile durch lokalen Energieeintrag, hohe Festigkeit durch Stoffschluss sowie gute Automatisierbarkeit durch berührungslosen Energieeintrag. Insbesondere die gute Fokussierbarkeit der Laserstrahlung und der damit verbundenen, hohen Ortsauflösung des Energieeintrages in das Bauteil, machen das Laserschweißen auch für mikrotechnische Anwendungen sehr interessant.

Welding of aluminium tailored blanks by Nd: YAG lasers

2003 ◽  
Vol 17 (4) ◽  
pp. 282-286 ◽  
Author(s):  
K Shibata ◽  
T Iwase ◽  
H Sakamoto ◽  
M Kasukawa ◽  
K Chiba ◽  
...  
Keyword(s):  
Yag Lasers ◽  
Tailored Blanks

Investigations on the Mechanical Properties and Formability of Friction Stir Welded Tailored Blanks

2007 ◽  
Vol 344 ◽  
pp. 143-150 ◽  
Author(s):  
Gianluca Buffa ◽  
Livan Fratini ◽  
Marion Merklein ◽  
Detlev Staud
Keyword(s):  
Mechanical Properties ◽  
Stress Condition ◽  
Research Effort ◽  
High Strength Steels ◽  
High Strength ◽  
Tensile Tests ◽  
Friction Stir ◽  
Tailored Blanks ◽  
Sheet Stamping ◽  
Wide Range

Tight competition characterizing automotive industries in the last decades has determined a strong research effort aimed to improve utilized processes and materials in sheet stamping. As far as the latter are regarded light weight alloys, high strength steels and tailored blanks have been increasingly utilized with the aim to reduce parts weight and fuel consumptions. In the paper the mechanical properties and formability of tailored welded blanks made of a precipitation hardenable aluminum alloy but with different sheet thicknesses, have been investigated: both laser welding and friction stir welding have been developed to obtain the tailored blanks. For both welding operations a wide range of the thickness ratios has been considered. The formability of the obtained blanks has been characterized through tensile tests and cup deep drawing tests, in order to show the formability in dependency of the stress condition; what is more mechanical and metallurgical investigations have been made on the welded joints.

Aluminum Tailored Blank Welding Using Laser Beam Shaping and Twin-Spot Optics

2000 ◽  
Author(s):  
Rey Hsu ◽  
Stefan Fliss ◽  
Stefan Heinemann
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Beam Shaping ◽  
Laser Source ◽  
Test Results ◽  
Co2 Lasers ◽  
Production Environment ◽  
Tailor Welded Blanks ◽  
Tailored Blanks ◽  
Tailored Blank

Abstract The use of aluminum tailor welded blanks in the automotive industry continues to grow due to the fact that aluminum is lightweight and the characteristics of the tailor welded blanks. It has been found that welding of aluminum blanks with a CO2 laser is difficult but doable in a production environment. By using a high power CW Nd:YAG (Neodynium dopped Yittrium Aluminum Garnet) laser. It is possible to obtain sound results with a much wider process parameter window. However, currently, high power CO2 lasers (in the range of 8 kW) are still the dominate laser source in North America steel tailor welded blank companies. Will these lasers be able to weld aluminum tailored blanks if the demand for aluminum tailor welded blanks increases? This study employed twin spot and beam shaping methods to weld 1mm and 2 mm tailored blanks together using a high power (9 kW maximum) CO2 laser for both 5754-O and 6111-T4 alloys. The results show that high power CO2 lasers can be used to weld 5754-O and 6111-T4 aluminum alloys with very precise parameter settings. However, using beam shaping is more critical than using twin spot for 1 mm thick aluminum blanks. Once the correct parameters are applied for using beam shaping, the cup test results are better than using twin spot.

An iterative approach for the determination of tailored blanks for waste-free composite forming by means of FE forming simulation

2017 ◽  
Vol 3 (2/3/4) ◽  
pp. 323 ◽  
Author(s):  
Dominik Dörr ◽  
Lukas Lipowsky ◽  
Fabian J. Schirmaier ◽  
Luise Kärger ◽  
Frank Henning
Keyword(s):  
Iterative Approach ◽  
Forming Simulation ◽  
Composite Forming ◽  
Tailored Blanks

Study on Formability Characteristics of the Weld Seam of Aluminum Steel Tailored Hybrid Blanks

2013 ◽  
Vol 549 ◽  
pp. 302-310 ◽  
Author(s):  
Ozan Singar ◽  
Marion Merklein
Keyword(s):  
Automobile Industry ◽  
Weld Seam ◽  
Weld Line ◽  
Tensile Tests ◽  
Forming Process ◽  
Manufacturing Costs ◽  
Tailor Welded Blanks ◽  
Welding Technology ◽  
Tailored Blanks ◽  
Cmt Welding

Tailor Welded Blanks (TWB) are characterized by the fact that sheets with different material qualities and/or thicknesses are welded together before the forming process. The application of TWBs in the automobile industry brings several advantages, such as the reduction of car body weight and manufacturing costs, as well as the integration of several drawing parts into one part. Despite several established tailor welded blanks types, a new version has emerged: The Tailored Hybrid Blanks (THB). The current investigation focuses on tailored hybrid blanks joined by the CMT-welding technology. The main aim of this study is to specify the mechanical properties as well as the formability of Aluminum Steel Tailored Blanks. Steel (HX340LAD, 0.8 mm) sheets covered by different zinc coat thicknesses were combined with an aluminum alloy (AA6014-T4, 1.2 mm). In order to determine the material properties and to analyze the Heat Affected Zone (HAZ), microhardness measurements were taken transversal and longitudinal to the weld line. Results indicate a change of hardness and a very small HAZ. Tensile tests (perpendicular to weld line) and Nakajima tests with online deformation analyses show that the main formation takes place on the aluminum side.

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