Matthias, Steffen
[Author];
Kästner, Markus
[Author];
Reithmeier, Eduard
[Author];
Lehmann, Peter
[Author];
Osten, Wolfgang
[Author];
Albertazzi Gonçalves, Armando, Jr.
[Author]
Endoscopic fringe projection for in-situ inspection of a sheet-bulk metal forming process
- [published Version]
You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article;
Text
Title:
Endoscopic fringe projection for in-situ inspection of a sheet-bulk metal forming process
Contributor:
Matthias, Steffen
[Author];
Kästner, Markus
[Author];
Reithmeier, Eduard
[Author];
Lehmann, Peter
[Author];
Osten, Wolfgang
[Author];
Albertazzi Gonçalves, Armando, Jr.
[Author]
imprint:
Bellingham, Wash. : SPIE, 2015
Published in:Optical Measurement Systems for Industrial Inspection IX : 22-25 June 2015, Munich, Germany ; Proceedings of SPIE 9525 (2015)
Footnote:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Description:
Sheet-bulk metal forming is a new production process capable of performing deep-drawing and massive forming steps in a single operation. However, due to the high forming forces of the forming process, continuous process control is required in order to detect wear on the forming tool before production quality is impacted. To be able to measure the geometry of the forming tool in the limited space of forming presses, a new inspection system is being developed within the SFB/TR 73 collaborative research center. In addition to the limited space, the process restricts the amount of time available for inspection. Existing areal optical measurement systems suffer from shadowing when measuring the tool's inner elements, as they cannot be placed in the limited space next to the tool, while tactile measurement systems cannot meet the time restrictions for measuring the areal geometries. The new inspection system uses the fringe projection optical measurement principle to capture areal geometry data from relevant parts of the forming tool in short time. Highresolution image fibers are used to connect the system's compact sensor head to a base unit containing both camera and projector of the fringe projection system, which can be positioned outside of the moving parts of the press. To enable short measurement times, a high intensity laser source is used in the projector in combination with a digital micro-mirror device. Gradient index lenses are featured in the sensor head to allow for a very compact design that can be used in the narrow space above the forming tool inside the press. The sensor head is attached to an extended arm, which also guides the image fibers to the base unit. A rotation stage offers the possibility to capture measurements of different functional elements on the circular forming tool by changing the orientation of the sensor head next to the forming tool. During operation of the press, the arm can be travelled out of the moving parts of the forming press. To further reduce the measurement times of the ...