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Support structure accessibility and removal in Additive Manufacturing using octree data structure

Samant, Rutuja
http://orcid.org/0000-0001-9622-9720
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439308253

Abstract Details

2015, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
Metal Additive Manufacturing (AM) has made it possible to manufacture complex parts by adopting a layer-by-layer approach. However, additional support structures are needed to support the overhanging surfaces in a part and to alleviate thermal distortion that may occur in these parts. This leads to, increased build time for part manufacturing and additional post processing efforts for removal of supports. Support structures also affect the surface finish of regions in which they come in contact with part and many a time, removal of these supports becomes difficult due to complicated part features. Thus, minimizing the need of support for a part and ensuring its maximum removal is very crucial for an efficient part build in Additive Manufacturing. The main parameter that influences the need for support structures to build a part is its build orientation. One of the objectives of this work is to identify the optimum build orientation of a part such that, overall part build time is minimized while ensuring maximum removal of support and minimizing contact area between part and support. A hierarchical octree data structure has been used to check the accessibility of support structures for removal and to calculate the amount of support in contact with part. The part build time is approximated based on the overall part build height. Incorporating the above parameters, a multi-objective optimization routine is developed to obtain the optimal build orientation for a part. Another area focused on in this research is the identification of optimal number/directions of part set-ups required to remove support structures from a part. A 2D setup map highlighting the feasible directions of setups for support removal has also been presented.
Sundararaman Anand, Ph.D. (Committee Chair)
Sundaram Murali Meenakshi, Ph.D. (Committee Member)
David Thompson, Ph.D. (Committee Member)
50 p.
Mechanics
Additive Manufacturing; Accessibility Analysis; Setup Analysis; Support Structures; Octree; Optimization

Recommended Citations

Citations

  • Samant, R. (2015). Support structure accessibility and removal in Additive Manufacturing using octree data structure [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439308253

    APA Style (7th edition)

  • Samant, Rutuja. Support structure accessibility and removal in Additive Manufacturing using octree data structure. 2015. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439308253.

    MLA Style (8th edition)

  • Samant, Rutuja. "Support structure accessibility and removal in Additive Manufacturing using octree data structure." Master's thesis, University of Cincinnati, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439308253

    Chicago Manual of Style (17th edition)

ucin1439308253
490
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This open access ETD is published by University of Cincinnati and OhioLINK.