Achtung:

Sie haben Javascript deaktiviert!
Sie haben versucht eine Funktion zu nutzen, die nur mit Javascript möglich ist. Um sämtliche Funktionalitäten unserer Internetseite zu nutzen, aktivieren Sie bitte Javascript in Ihrem Browser.

Lattice structure tensile specimen manufactured with laser melting (LM) process out of the material H13. Show image information
Partner of the DMRC Show image information
Partner of the DMRC Show image information
Quality control during a Laser Sinter (LS) build job by a researcher of the DMRC Show image information
Fused Deposition Modeling (FDM) process during the manufacture of an Ultem 9085 part Show image information
Additive manufactured reaction wheel bracket for telecomunication satellites Show image information
Employees of the DMRC working with the "freeformer" from Arburg Show image information
Tactile measurement of a SLM part with a Coordinatemeasuring machine (CMM) Show image information
Powder particles are used as raw material for laser-based additive manufacturing Show image information

Lattice structure tensile specimen manufactured with laser melting (LM) process out of the material H13.

Partner of the DMRC

Partner of the DMRC

Quality control during a Laser Sinter (LS) build job by a researcher of the DMRC

Fused Deposition Modeling (FDM) process during the manufacture of an Ultem 9085 part

Additive manufactured reaction wheel bracket for telecomunication satellites

Employees of the DMRC working with the "freeformer" from Arburg

Tactile measurement of a SLM part with a Coordinatemeasuring machine (CMM)

Powder particles are used as raw material for laser-based additive manufacturing

Surface Finishing

Partner

This post processing study was realized in cooperation with Walther Trowal GmbH & Co. KG, a company specializing in grinding technology based in Haan.

FIGURE 1 Component on building plate after sand blasting
FIGURE 2 Component after final surface finish through vibratory grinding

Objectives

The surfaces of additive components are not as smooth as for conventional machined parts due to the manufacturing process. Therefore, AM manufactured components require a surface post treatment. Due to the complex geometries of AM components with undercut and difficult to reach areas, conventional machining like drilling or milling are not suitable as overall surface treatments. Even sand blasting often does not meet the requirements. In cooperation with Walther Trowal the vibratory finishing technique was investigated as a surface treatment for additive manufactured components. This offers attractive possibilities for improving the surface.

Procedure

Walther Trowal has developed various processes and special machines for subsequent surface treatment. The Direct Manufacturing Research Center at Paderborn University has provided various components with hard-to-reach areas and narrow cross-sections. These are treated by vibratory grinding for a period of around 24 hours. The polishing and treatment additives developed at Walther Trowal are specially selected for the materials to be prepared.

Archievements

After the treatment, the surface quality of the components is outstanding. Even very narrow and hard to reach areas have a smooth surface. The process is also used by many well-known companies for difficult-to-machine materials such as titanium and cobald chromium alloys. The process is characterized by high quality and reproducibility, which makes it attractive for other applications.

Contact

Prof. Dr. Thomas Tröster

Institut für Leichtbau mit Hybridsystemen (ILH)

Vorstandsvorsitzender

Thomas Tröster
Phone:
+49 5251 60-5331
Fax:
+49 5251 60-5333
Office:
Y2.116

Prof. Mirko Schaper

Fakultät für Maschinenbau

Lehrstuhlleiter

Mirko Schaper
Phone:
+49 5251 60-3855
Fax:
+49 5251 60-3854
Office:
Y2.110

Dominik Ahlers

Leichtbau im Automobil

Team leader Additive Manufacturing

Dominik Ahlers
Phone:
+49 5251 60-5422
Office:
W 2.101

M.Sc. Florian Hengsbach

Werkstoffkunde

Florian Hengsbach
Phone:
+49 5251 60-5451
Office:
W2 101

The University for the Information Society