Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

LZH optimizes laser-based CFRP reworking for the aircraft industry

24.11.2016

To be able to rework aircraft components made of carbon-fiber reinforced plastics (CFRP) more efficiently in the future, the Laser Zentrum Hannover e.V. (LZH) has started the joint research project ReWork together with the INVENT GmbH, OWITA GmbH und Precitec Optronik GmbH. The aim of the project is to develop a reliable process for thin-walled and complex CFRP components.

Today, many aircraft components are made of the lightweight material CFRP. Advantages of this material are the low weight and the high stability.


Repair preparation of a CFRP aircraft component through layer-by-layer laser removal of the damaged material areas

Foto: LZH

The processing of this material, however, is still difficult. Therefore, in order to eliminate production- and operation-related defects in a faster and more cost-efficient way, the aircraft industry requires a reliable solution.

Eliminating defective areas by custom-fit patches

Laser-based processes offer promising approaches: Carbon fiber tissue can be processed contact-, force- and wear-free. Moreover, the high geometric resolution of the laser makes it possible to scarf the surface precisely and to insert custom-fit replacement patches. During the patch repair, the defective areas are removed layer-by-layer using the laser, and then replaced by a custom-fit patch.

An innovative system technology, consisting of a laser, a scanner, a short-coherence interferometry system and a control software, determines the individual process parameters according to the shape of the component.

The short-coherence interferometry system measures the depth spatially with high resolution and thus ensures a precise layer-by-layer removal. In that way, surface deformations due to local increases in thickness, which occur frequently during mechanical processing, can be avoided.

Flexible laser parameters for variable component geometries

Apart from the proper system technology, the Composites Group of the Production and Systems Department focuses on the further development of the laser process. One challenge during the laser-based surface post-treatment of CFRP aircraft components is their thin-walled and complex shape that requires individually adapted laser parameters.

Further, CFRP typically has a spatially inhomogeneous thermal conduction. To achieve a constant surface quality nevertheless, the LZH experts are inventing a sophisticated process strategy – also considering the geometric scalability of the process parameter. The new technology shall be usable for 2D and 3D components, too – ideally with the possibility for automation.

The project „Reliable reworking on thin-walled, curved CFRP surfaces using photonic systems and piezo-assisted quality control” (ReWork) is sponsored by the German Federal Ministry of Economics and Energy (BMWi) for a duration of three years.

Dr. Nadine Tinne | Laser Zentrum Hannover e.V.
Further information:
http://www.lzh.de/

Further reports about: CFRP LZH Laser Zentrum Hannover aircraft industry innovative system

More articles from Machine Engineering:

nachricht More functionalities: Microstructuring large surfaces with a UV-laser system
05.07.2018 | Fraunhofer-Institut für Lasertechnik ILT

nachricht A factory to go
04.07.2018 | Fraunhofer Institute for Manufacturing Engineering and Automation IPA

All articles from Machine Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Color effects from transparent 3D-printed nanostructures

New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference

Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...

Im Focus: Unraveling the nature of 'whistlers' from space in the lab

A new study sheds light on how ultralow frequency radio waves and plasmas interact

Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...

Im Focus: New interactive machine learning tool makes car designs more aerodynamic

Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.

When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...

Im Focus: Robots as 'pump attendants': TU Graz develops robot-controlled rapid charging system for e-vehicles

Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.

Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....

Im Focus: The “TRiC” to folding actin

Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.

Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

LaserForum 2018 deals with 3D production of components

17.08.2018 | Event News

Within reach of the Universe

08.08.2018 | Event News

A journey through the history of microscopy – new exhibition opens at the MDC

27.07.2018 | Event News

 
Latest News

Smallest transistor worldwide switches current with a single atom in solid electrolyte

17.08.2018 | Physics and Astronomy

Robots as Tools and Partners in Rehabilitation

17.08.2018 | Information Technology

Climate Impact Research in Hannover: Small Plants against Large Waves

17.08.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>