Genetic-algorithm-based multi-objective optimization of the build orientation in stereolithography

Canellidis, V.; Giannatsis, John; Dedoussis, V.

doi:10.1007/s00170-009-2006-y

Cited by 102 publications

(70 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, SLA systems from 3D systems claim to have layer thickness of 0.03 mm with a scanning spot size of 0.12 mm [13]. Objet machines have layer thickness of 0.016 mm and XY resolution of 0.042 mm [12].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

RP part surface quality versus build orientation: when the layers are getting thinner

Chen

2012

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Surface quality is a very important factor to be considered in determining part build orientation in rapid prototyping (RP) processes. Previous research has shown that parts built with inclined planes or curved surfaces along the build orientation have large staircase effect, thus have higher surface roughness compared to parts built with only vertical surfaces. However, as layers are getting thinner in rapid prototyping processes, the opposite might be true. In this study, a number of experiments and measurements are conducted first. In a single machine setup, two cylinders are built, one along axial direction and the other along transverse direction using an Objet® machine. Measurements have shown that surface roughness of RP parts built along the transverse direction is better than those from the axial direction. Through analysis and observation, the authors can conclude that when layers are small enough, surface curvature or slope along the build orientation may no longer be a major concern for RP part surface quality. Instead, the authors have observed that on-the-layer contour layout may cause even more serious surface quality problem. In other words, surface quality is not only dependent on build orientation, but more on scanning orientation on layers.

show abstract

Section: Discussionmentioning

confidence: 99%

“…In fact, effort in optimizing the build orientation for optimal surface quality has never stopped as can be seen in [10][11][12][13]. Almost all previous research on optimal build orientation refers the orientation of the object as a whole.…”

Section: Introductionmentioning

confidence: 99%

RP part surface quality versus build orientation: when the layers are getting thinner

Chen

2012

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…Refinements to the process to improve production efficiency and accuracy have been studied in some detail over the past 20 years [1,4,12,13]. The majority of the published research has focussed on plastic technologies.…”

Section: Introductionmentioning

confidence: 99%

Part orientation optimisation for the additive layer manufacture of metal components

Morgan

Cherry

Jonnalagadda

et al. 2016

Int J Adv Manuf Technol

View full text Add to dashboard Cite

In a number of additive layer manufacturing processes, particularly for metals, additional support structure is required during the build process to act as scaffolding for overhanging features and to dissipate process heat. Such structures use valuable raw materials and their removal adds to post processing time. The objective of this study was to investigate whether a simple, single objective optimisation technique could be used to find the best orientation of the part, that would minimise the volume of support needed during the build. Not only reducing waste but potentially providing an effective and consistent approach for inexperienced users to orient components during manufacture. Software was developed using MatLab with an unconstrained optimisation algorithm implemented to search the different rotations of the part and identify the configuration with the least requirement for support volume. The algorithm was gradient based, and so multiple starting points were used to identify a global minimum. The efficacy of the algorithm is illustrated with three different case studies of increasing complexity. Additionally, the component of the final study was manufactured, which allowed a comparison between the algorithm's results and the orientations chosen by experienced operatives. In two of the three case studies, the software was able to find good solutions for the support volume minimisation. For the manufactured part, only one of the results matched the orientation chosen by the operators, the other was orientated in a similar way but the difference added significantly to the required support volume. Future developments of the software would benefit from incorporating the expertise of the manufacturing operative.

show abstract

“…Build orientation selection is a key aspect of AM build strategy and is a trade-off between build time, surface finish and manufacturing cost. Several researchers have proposed methods to optimise the build orientation of rapid prototyped parts (Byun and Lee 2006;Canellidis, Giannatsis, and Dedoussis 2009;Kulkarni, Marsan, and Dutta 2000). Kulkarni, Marsan, and Dutta (2000) state that build orientation and support structure generation are key tasks to be performed in the model domain of process planning for layered manufacturing of polymer parts.…”

Section: Optimal Manufacturing Strategies For Additive Manufacturementioning

confidence: 99%

Design for Wire + Arc Additive Manufacture: design rules and build orientation selection

Lockett

Ding

Williams

et al. 2017

Journal of Engineering Design

114

View full text Add to dashboard Cite

Filomeno (2017). Design for Wire + Arc Additive Manufacture: design rules and build orientation selection. Journal of Engineering Design, 28(7-9) pp. 568-598.For guidance on citations see FAQs. ABSTRACTWire + Arc Additive Manufacture (WAAM) is an additive manufacturing technology that can produce near net-shape parts layer by layer in an automated manner using welding technology controlled by a robot or CNC machine. WAAM has been shown to produce parts with good structural integrity in a range of materials including titanium, steel and aluminium and has the potential to produce high value structural parts at lower cost with much less waste material and shorter lead times that conventional manufacturing processes.This paper provides an initial set of design rules for WAAM and presents a methodology for build orientation selection for WAAM parts. The paper begins with a comparison between the design requirements and capabilities of WAAM and other additive manufacturing technologies, design guidelines for WAAM are then presented based on experimental work. A methodology to select the most appropriate build orientation for WAAM parts is then presented using a multi attribute decision matrix approach to compare different design alternatives. Two aerospace case study parts are provided to illustrate the methodology. ARTICLE HISTORY

show abstract

Genetic-algorithm-based multi-objective optimization of the build orientation in stereolithography

Cited by 102 publications

References 26 publications

RP part surface quality versus build orientation: when the layers are getting thinner

RP part surface quality versus build orientation: when the layers are getting thinner

Part orientation optimisation for the additive layer manufacture of metal components

Design for Wire + Arc Additive Manufacture: design rules and build orientation selection

Contact Info

Product

Resources

About