Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New CAM system for efficient laser material deposition

14.11.2012
The Fraunhofer Institute for Laser Technology ILT has developed an offline programming system for laser material deposition. The LaCam3D program enables process developers and end-users to generate tool paths quickly, even for complex LMD tasks that have non-standard welding strategies.
The generated paths are translated into machine code, and can be tested for possible collisions via a machine simulation. LACam3D will be presented for the first time at the EuroMold from November 27.-30., 2012 in Frankfurt at the Fraunhofer joint booth, hall 11- C66a.

Unique characteristics of laser material deposition (LMD) in comparison with conventional processes are e.g. the minimalized heat input and low levels of distortion. Combined with the high degree of process accuracy and the potential for automation it offers, this results in LMD becoming increasingly important for industrial applications such as an additive, repair or manufacturing process.

Path planning

The additive manufacture of parts using LMD involves the CAD model of the part being split into horizontal, cross-sectional layers that correspond to the direction in which the part is to be built up. These are then filled out using equidistant tool paths or parallel paths, being projected onto the welding surface, according to the strategy that has been selected. For the repair of parts that have suffered operational wear and tear, the actual geometry is first measured using a laser line scanner to generate a point cloud, from which a surface model is made using reverse engineering. The volume of the defect is ascertained by determining the best fit between the actual geometry and the CAD model of the component, and is then built up using LMD.

Functionalities

LaCam3D provides functionalities for LMD strategies that enable the LMD sequence and welding direction of individual paths to be modified. Parameters like laser power and velocity can be specified and tuned for each individual tool path. When designating tool paths to fill the various layers, the user can choose between equidistant paths and parallel paths that are projected onto the surface of the layer. The paths are automatically cropped to keep within the boundary marking the edge of the defect area. The paths are planned in such a way as to allow enough oversize for the finishing process that follows, in which excess material is machined. There is a specifically designed module available to help plan paths for turbine parts made using additive manufacturing. Due to its modular structure, the program can be complemented as necessary for various applications by further modules.

Collision testing

LaCam3D is equipped with a simulation tool that can check in advance whether the planned LMD process will cause the laser processing head to collide with the part. The machine code is generated using an integrated postprocessor that supports a full range of different systems.
Modularity

As a CAM module for LMD, LaCam3D’s functionalities are designed in such a way that the process developer and end-user can generate LMD paths immediately, even for complex LMD jobs with non-standard LMD strategies. The modular structure of the program allows additional algorithms of particular LMD strategies to be integrated. Currently, a prototype of LaCam3D is used at Fraunhofer ILT in Aachen for about 2 years now, and that they are continuing to develop.

Contacts

Dr. Norbert Pirch
Competence Area Additive Manufacturing and Functional Layers
Phone +49 241 8906-636
norbert.pirch@ilt.fraunhofer.de

Dipl.-Phys. John Flemmer
Polishing Group
Phone +49 241 8906-137
john.flemmer@ilt.fraunhofer.de
Fraunhofer Institute for Laser Technology ILT
Steinbachstraße 15
52074 Aachen, Germany
Phone +49 241 8906-0
Fax +49 241 8906-121

Axel Bauer | Fraunhofer-Institut
Further information:
http://www.ilt.fraunhofer.de

More articles from Trade Fair News:

nachricht AchemAsia 2019 will take place in Shanghai
15.06.2018 | DECHEMA Gesellschaft für Chemische Technik und Biotechnologie e.V.

nachricht Insects supply chitin as a raw material for the textile industry
05.06.2018 | Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB

All articles from Trade Fair News >>>

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 >>>