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Applied Sciences
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Laser Material Processing and Thermal Joining Process
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Laser Material Processing and Thermal Joining Process

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (20 May 2024) | Viewed by 3995

Special Issue Editor

Dr. Klaus Schricker

E-Mail Website
Guest Editor
Production Technology Group, Technische Universität Ilmenau, Gustav-Kirchhoff-Platz 2, 98693 Ilmenau, Germany
Interests: joining technology; laser welding; laser-assited metal-polymer joining; process technology; material science; systems engineering; modelling; simulation

Special Issue Information

Dear Colleagues,

This special issue addresses original scientific articles and detailed reviews related to important and novel developments in the field of laser material processing and thermal joining processes.Both fields are of great importance, and innovative approaches in process design and systems engineering are increasing the range of applications for cutting-edge industries, for example in electromobility and other branches. This special issue focusses specifically on contributions dealing with novelties in process design, material science and systems engineering and their interaction in the context of laser material processing and thermal joining processes

Dr. Klaus Schricker
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • laser material processing, e.g. laser welding (cw and pw), surface structuring
  • thermal joining processes, e.g. friction stir welding, ultrasonic welding
  • innovative process design and technology, e.g. adjustable intensity distributions in laser material processing, tool design in friction stir welding
  • dynamic behavior of processes and tools, e.g. keyhole stability and tool wear
  • systems engineering including fixture design, process monitoring and control
  • joining of similar and dissimilar materials, e.g. steel-steel, aluminum-copper, aluminum-steel, metal-plastic
  • optimization, modelling and simulation
  • seam defects, formation mechanismns and avoidance
  • structural performance

Published Papers (2 papers)

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Research

17 pages, 8137 KiB  
Article
Optimization of Laser-Assisted Polypropylene Aluminum Joining
by Mahdi Amne Elahi, Anthony Marozzi and Peter Plapper
Appl. Sci. 2023, 13(6), 3582; https://doi.org/10.3390/app13063582 - 10 Mar 2023
Viewed by 1150
Abstract
Laser joining of polymers to metals is a rising research subject due to the potential of considerably reducing the weight of structures. This article deals with the laser joining process between polypropylene and aluminum. Without pre-treatment, laser joining of these materials is not [...] Read more.
Laser joining of polymers to metals is a rising research subject due to the potential of considerably reducing the weight of structures. This article deals with the laser joining process between polypropylene and aluminum. Without pre-treatment, laser joining of these materials is not feasible, and the method applied in this study to circumvent this issue is a surface modification of aluminum with a pulsed laser to create mechanical interlocking for the heat conduction laser joining technique. Different patterns and various laser parameters are analyzed with the design of experiments to best understand the effects of each parameter along with microscopic observations. It is found that engraving weakens the mechanical properties of the aluminum samples. The compromise between the engraving depth and the mechanical properties of the samples is optimized, and the engraving process with a 0.28 mm line width, 27.3% density and 150 mm/s speed provides the highest mechanical performance of the assembly with minimum degradation of aluminum samples. Moreover, by adjusting the laser power and using power modulation below 300 W, the decomposition of polypropylene occurring at high temperatures is reduced to a minimum. After the final optimization, the joined samples reliably withstand a maximum force of 1500 N, which is, approximately, a shear strength of 20 MPa. Full article
(This article belongs to the Special Issue Laser Material Processing and Thermal Joining Process)
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17 pages, 10440 KiB  
Article
Gap and Force Adjustment during Laser Beam Welding by Means of a Closed-Loop Control Utilizing Fixture-Integrated Sensors and Actuators
by Klaus Schricker, Leander Schmidt, Hannes Friedmann and Jean Pierre Bergmann
Appl. Sci. 2023, 13(4), 2744; https://doi.org/10.3390/app13042744 - 20 Feb 2023
Cited by 3 | Viewed by 2150
Abstract
The development of adaptive and intelligent clamping devices allows for the reduction of rejects and defects based on weld discontinuities in laser-beam welding. The utilization of fixture-integrated sensors and actuators is a new approach, realizing adaptive clamping devices that enable in-process data acquisition [...] Read more.
The development of adaptive and intelligent clamping devices allows for the reduction of rejects and defects based on weld discontinuities in laser-beam welding. The utilization of fixture-integrated sensors and actuators is a new approach, realizing adaptive clamping devices that enable in-process data acquisition and a time-dependent adjustment of process conditions and workpiece position by means of a closed-loop control. The present work focused on sensor and actuator integration for an adaptive clamping device utilized for laser-beam welding in a butt-joint configuration, in which the position and acting forces of the sheets to be welded can be adjusted during the process (studied welding speeds: 1 m/min, 5 m/min). Therefore, a novel clamping system was designed allowing for the integration of inductive probes and force cells for obtaining time-dependent data of the joint gap and resulting forces during welding due to the displacement of the sheets. A novel automation engineering concept allowed the communication between different sensors, actuators and the laser-beam welding setup based on an EtherCAT bus. The subsequent development of a position control and a force control and their combination was operated with a real time PC as master in the bus system and proved the feasibility of the approach based on proportional controllers. Finally, the scalability regarding higher welding speeds was demonstrated. Full article
(This article belongs to the Special Issue Laser Material Processing and Thermal Joining Process)
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