Doctoral Dissertations


Process planning for multi-axis hybrid manufacturing systems using centroidal axis transform

Keywords and Phrases

Laser aided manufacturing process (LAMP); Hybrid manufacturing systems; Centroidal axis transform


"A Laser Aided Manufacturing Process (LAMP) System is a multi-axis hybrid layered manufacturing system in which the deposition and machining processes are integrated. Functional parts can be directly produced from the CAD drawings. Near net shapes are built by depositing layers of material on top of each other one by one. The surface is finished by CNC machining after a certain number of layers have been deposited. If the system has the capability of 5-axis movements, then the shapes of the parts are not limited to 2.5-D. Support structures are usually needed in layered manufacturing for building parts with overhang features. However, in the LAMP system, 3-D layer slicing has been implemented to handle complicated parts in order to reduce the support structures. Unlike most of the other deposition processes, instead of STL-format files, boundary-representation (B-Rep) part files are used as the input for the path planning processor. This reduces the errors due to the approximation in the process of converting the CAD part files to STL-format files. The slices generated by 3-D slicing technique are R² surfaces embedded in R³ Space. Deposition offset paths based on Voronoi diagram of the slice geometry are then planned on each slice. Not only can the LAMP system be used to build a functional part directly from a CAD model, but also the system can be used in other applications. Part repair, which is one of the promising applications, using this system is described"--Abstract, page iv.


Mechanical and Aerospace Engineering

Degree Name

Ph. D. in Mechanical Engineering


University of Missouri--Rolla

Publication Date

Summer 2005

Journal article titles appearing in thesis/dissertation

  • Automatic multi-axis slicing based on centroidal axis computation
  • Building sequence of boundary model in layered manufacturing
  • Toward automatic process planning of a multi-axis hybrid laser aided manufacturing system: skeleton-based offset edge generation
  • Part repair using a hybrid manufacturing system


xii, 159 pages

Note about bibliography

Includes bibliographical references.


© 2005 Kunnayut Eiamsa-ard, All rights reserved.

Document Type

Dissertation - Citation

File Type




Subject Headings

Production planning -- Automation
Manufacturing processes
Computer integrated manufacturing systems -- Design and construction

Thesis Number

T 8827

Print OCLC #


Link to Catalog Record

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