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OPTIMIZING 3D PRINTING PROcESS PARAMETERS TO MINIMIZE SURFAcE ROUGHNESS USING BAYESIAN OPTIMIZATION

OPTIMIZING 3D PRINTING PROCESS PARAMETERS TO MINIMIZE SURFAC...

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asme 2024 International design engineering technical conference. and computers and Information in engineering conference. IDETc-cIE 2024

作者： Kolte, Akash Bhaskaran, Vignesh Hoyle, christopher Design Engineering Lab. Oregon State University CorvallisOR97331 United States

ISBN: (纸本)9780791888346

Additive manufacturing techniques, particularly Fused Deposition Modeling have been extensively used in various industries due to their advantages in part design and flexibility over the conventional subtractive manufacturing processes. The process parameters play a crucial role in FDM 3D printing and need to be carefully tuned and optimized to achieve the desired quality, mechanical strength, and accuracy of the printed parts. This paper aims to optimize the process parameters in FDM 3D printing using a Bayesian Optimization (BO) method to minimize the surface roughness of the printed part. Nozzle temperature, layer height, bed temperature, print speed, and infill density are the five continuous input process parameters considered while the surface roughness is the output response. 34 Latin Hypercube Samples (LHS) are printed on a Prusa i3MK3S+ 3D FDM printer to generate the initial samples used in the optimization. Sequential BO with expected improvement as the acquisition function is used to find the optimal process parameters by balancing exploration and exploitation. The overall mean surface roughness (Ra) of the 57 experiments conducted was 6.09 µm and the optimizer produced an optimum value of 2.78 µm when the nozzle temperature was set to 216 °c, bed temperature to 66 °c, print speed to 73 mm/s, infill density to 20% and layer height to 0.123 mm respectively. © 2024 by asme.

关键词： Fused Deposition Modeling

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IMPROVING KNOWLEDGE cAPTURE, AccESS, AND REUSE BY A MODEL-BASED AND DATA-DRIVEN MANAGEMENT USING THE EXAMPLE OF AVIATION’S RETROFIT

IMPROVING KNOWLEDGE CAPTURE, ACCESS, AND REUSE BY A MODEL-BA...

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asme 2024 International design engineering technical conference. and computers and Information in engineering conference. IDETc-cIE 2024

作者： Laukotka, Fabian N. Krause, Dieter Institute of Product Development and Mechanical Engineering Design Hamburg University of Technology Hamburg Germany

ISBN: (纸本)9780791888353

The retrofit of aircraft - the design and installation of new cabins into existing planes, comes with challenges, particularly regarding access to the necessary information. Although aircraft are generally similar, each single one becomes unique over time due to its individual usage and maintenance. While certification requires the changes made to be documented, this is typically done through numerous individual documents that are differentiated by domain, area within the aircraft, revision, and other factors that lead to a fragmentation of information. Engineers rely on implicit knowledge gained from years of experience and common knowledge as well as established structures like the ATA-chapters, to tediously re-join these fragments and gain an overview of the current state of the aircraft and the relevant documents. This work presents an approach that utilizes ontologies to capture implicit knowledge and combines it with system models defining generic information as well as the definitions of standards that are identical for certain types of aircraft. A web application that functions as an access system is introduced to help engineers filter and identify required information and documents more easily when planning a new cabin. Finally, together with a partner from the industry, this approach is applied to a case study. copyright © 2024 by asme.

关键词： Retrofitting

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NAVIGATING TEAM DIALOGUES: HOW TEAM DYNAMIcS AFFEcT cONVERGENT AND DIVERGENT design AcTIONS DURING cONcEPT GENERATION AND SELEcTION

NAVIGATING TEAM DIALOGUES: HOW TEAM DYNAMICS AFFECT CONVERGE...

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asme 2024 International design engineering technical conference. and computers and Information in engineering conference. IDETc-cIE 2024

作者： Dougherty, Presley Letting, cynthia Witherell, c.J. Soria Zurita, Nicolás F. Starkey, Elizabeth Menold, Jessica School of Engineering Design and Innovation The Pennsylvania State University United States Department of Mechanical Engineering The Pennsylvania State University United States

ISBN: (纸本)9780791888407

communication plays a pivotal role in design teams and can impact team dynamics and design outcomes. Understanding the relationships between design communication and design trajectory can significantly improve our ability to track and optimize design processes. While prior work has investigated design convergence, there is limited work on how team climate and communicative patterns impact the design process. This study investigates the interactions between team climate, communication, and design actions. We estimate team climate as an individual's perception of their team's psychological safety, or how comfortable they feel sharing thoughts and ideas freely. design actions were measured using a behavioral coding schema and audio recordings of design team interactions. In this work, 28 participants and 5 design thinking experts engaging in a design thinking workshop were studied to understand the relationship between design communication, process, and team climate. contrary to expectations, this mixed-methods study found no significant correlation between perceived psychological safety and design behaviors in engineering design teams, challenging prior research suggesting a positive link. This finding highlights the complexity of team dynamics and underscores the need for further exploration to understand how psychological safety, conversational behaviors, and design actions interact to shape collaborative processes and innovation in design teams. copyright © 2024 by asme.

关键词： Behavioral research

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A DIGITAL TWIN ASSISTED FRAMEWORK FOR QUALITY ASSURANcE IN MOULD MANUFAcTURING

A DIGITAL TWIN ASSISTED FRAMEWORK FOR QUALITY ASSURANCE IN M...

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asme International design engineering technical conference. / 43rd Annual computers and Information in engineering conference.(IDETc-cIE)

作者： Boettjer, Till Ramanujan, Devarajan Aarhus Univ Dept Elect & Comp Engn DK-8000 Aarhus C Denmark Aarhus Univ Dept Mech & Prod Engn Ctr Digitalizat Big Data & Data Analyt DK-8000 Aarhus C Denmark

ISBN: (纸本)9780791887295

This paper discusses a Digital Twin framework for quality assurance in mould manufacturing consisting of the physical and virtual manufacturing process connected by a data lake. To this end, we present the DT framework and demonstrate its applicability at the example of ensuring the quality of milling features on a mould tool part. For the demonstration we build two cascaded models, a tool wear state model and an insert part quality model. The tool wear state model assigns a label corresponding to the tool wear state using cutting force measurements. The part quality model then uses the tool state and engineering data to classify quality of individual milling features on the mould tool part. To develop the cascaded models, we conducted a case study which experimentally collected machine controller data and cutting forces using a Kistler dynamometer for machining a test part on a Makino V33i three-axis vertical milling machine. The test part contains mould tool specific features and is made of hardened tool steel (46-52 HRc). Three milling tools were repeatedly used to machine test parts and gather data at different tool wear states. For validating the part quality model, we further collected metrology data from a coordinate measurement machine. Results show that the developed cascaded models are able to monitor the tool wear stage and to classify quality deviations with a weighted F1 measure of 89.0%.

关键词： Smart Manufacturing Digital Twin Quality Assurance part Quality ToolWear Monitoring

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LOcALISATION OF MOBILE ROBOTS VIA ULTRA-WIDEBAND SYSTEMS

LOCALISATION OF MOBILE ROBOTS VIA ULTRA-WIDEBAND SYSTEMS

引用

asme International design engineering technical conference. / 43rd Annual computers and Information in engineering conference.(IDETc-cIE) / 19th IEEE/asme International conference.on Mechatronic and Embedded Systems and Applications (MESA)

作者： Neri, Federico Annoni, Luca Alfredo Palmieri, Giacomo Palpacelli, Matteo-claudio callegari, Massimo Polytech Univ Marche DIISM Dept Ind Engn & Math Sci Ancona Italy Tekne Srl R&D Dept C Alboreto Snc I-66026 Ortona CH Italy

ISBN: (纸本)9780791887356

This paper presents an innovative solution that allows an autonomous mobile robot (AMR) to locate itself in space via UWB nodes. This reduces the possibility of error caused by the modularity of warehouses and makes it possible to send variable missions based on the data received. To this end, it was decided to use ultra-wideband (UWB) nodes, which allow to calculate the spatial coordinates of a reference tag with respect to the robot. Using this approach, material was taken from a storage facility and loaded on board using an anthropomorphic arm positioned on the mobile robot. Subsequently, other reference tags are used to locate a mobile truck equipped with a loading platform. In this way, a mission can be sent to the mobile robot to get on the truck and be transported to another work area. The article describes the advantages and difficulties of this localisation methodology and shows how tests were carried out to verify its functioning. The study is part of eMOBOTS (electric mobility robot & shuttle), a project that aims to develop mobility solutions for the smart factory developed by TEKNE srl, the Department of Industrial engineering and Mathematical Sciences, Polytechnic University of Marche and the company Joytek.

关键词： mobile manipulator ultra-wideband localisation autonomous mobile robot

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FAcILITATING SUccESS: EXPLORING THE INFLUENcE OF design FAcILITATORS’ BEHAVIORS ON TEAM MEMBERS’ RESPONSES AND PERcEPTIONS OF TEAM cLIMATE AND TRUST

FACILITATING SUCCESS: EXPLORING THE INFLUENCE OF DESIGN FACI...

引用

asme 2024 International design engineering technical conference. and computers and Information in engineering conference. IDETc-cIE 2024

作者： Witherell, c.J. Maar, Aliaa Dougherty, Presley Letting, cynthia Menold, Jessica Department of Mechanical Engineering The Pennsylvania State University United States School of Engineering Design and Innovation The Pennsylvania State University United States

ISBN: (纸本)9780791888407

Teams are vital in engineering design as they harness collective problem-solving abilities and enhance creative outputs. However, complex social dynamics, cognitive biases, and individual traits hinder their overall effectiveness, rendering them less useful than the combined capabilities of their members. While previous research has recognized the importance of facilitation and favorable climate for team success, limited research has explored the specific behaviors employed by facilitators to achieve desired outcomes. Leveraging data from a design Thinking workshop, our mixed-methods study investigates five facilitators’ behaviors and their impact on team dynamics. We develop Markov models to represent the team’s conversational dynamics. Similarities across models indicate recognizable interaction patterns despite group differences. High transition probabilities between facilitator and both participant engagement and support suggest that facilitator involvement fosters a collaborative atmosphere. The significant transition probability from facilitator clarification to participant question underscores the facilitator’s role in promoting comprehension. To assess the impact of facilitators’ behaviors on participants’ perceptions of trust and psychological safety, we examine the correlations between these factors. Significant correlations suggest facilitators positively influence psychological safety through engagement in the design task and promotion of reflective behaviors. contrasting prior research, rapport building does not correlate with psychological safety. participants express higher levels of trust in facilitators who provide more direction. It is crucial for facilitators to recognize their influence and employ tactics to foster trust and positive team climate. These findings hold significant implications for the effective facilitation of design teams, a necessary step to ensuring the success of teamwork. copyright © 2024 by asme.

关键词： Markov processes

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SAFEZONE: A TOPOLOGIcALLY-AWARE VORONOI-BASED FRAMEWORK FOR FAST cOLLISION-FREE cOOPERATIVE 3D PRINTING

SAFEZONE: A TOPOLOGICALLY-AWARE VORONOI-BASED FRAMEWORK FOR ...

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asme 2024 International design engineering technical conference. and computers and Information in engineering conference. IDETc-cIE 2024

作者： Stone, Ronnie F.P. Ebert, Matthew Zhou, Wenchao Akleman, Ergun Krishnamurthy, Vinayak Sha, Zhenghui Walker Department of Mechanical Engineering University of Texas at Austin AustinTX United States J. Mike Walker’66 Department of Mechanical Engineering Texas A&M University College StationTX United States Department of Mechanical Engineering University of Arkansas FayettevilleAR United States Department of Visualization Texas A&M University College StationTX United States

ISBN: (纸本)9780791888346

Swarm manufacturing (SM) is an emerging manufacturing paradigm that employs a heterogeneous swarm of robots to accomplish complex hybrid manufacturing tasks. cooperative 3D Printing (c3DP), a special form of swarm manufacturing, uses multiple printers to print large-scale parts cooperatively and aims to tackle key challenges in the additive manufacturing industry, such as trade-offs among size, speed, quality, and cost. A fundamental challenge in c3DP is how to achieve collision-free, time-efficient printing when multiple printers operate in a shared workspace. This is a complex problem since the solution may depend on a myriad of factors, such as the number of printers, part geometry, printer positioning, mobility, and kinematics, or whether the printing path pre-determined. In this paper, we present SafeZone, a collision-free and scalable c3DP framework that aims to minimize printing time by considering both the geometry and topology (space-connectivity) of the resulting workspace when segmenting the part layer. To achieve this, we use a guided Voronoi tessellation that can only produce degree-3 partitions, which we show to have optimal scheduling properties based on the chromatic number of the resulting partition graph. The sites of the Voronoi tessellation are constrained to only lie on the boundary of their convex hull, thus facilitating collision-free operation in c3DP systems with robotic arms. We demonstrate through physical testing in a 4-printer scenario with ScARA arms that SafeZone can produce collision-free prints, resulting in a printing time reduction of 44.63% when compared to the single-printer scenario. Finally, we show how the partition created by our methodology has a printing time reduction of 22.83% when compared to a naive choice which does not consider workspace topology. © 2024 by asme.

关键词： Robotic arms

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DATA–DEFINED MAcHINE INTELLIGENcE FOR MEcHANIcAL PROPERTIES IDENTIFIcATION

DATA–DEFINED MACHINE INTELLIGENCE FOR MECHANICAL PROPERTIES...

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asme 2024 International design engineering technical conference. and computers and Information in engineering conference. IDETc-cIE 2024

作者： Iliopoulos, A.P. Michopoulos, J.G. Steuben, J.c. Apetre, N. Computational Multiphysics Systems Laboratory Materials Science and Technology Division U.S. Naval Research Laboratory WashingtonDC20375 United States

ISBN: (纸本)9780791888353

In this work we are introducing a Machine Intelligence (MI) concept that belongs to the set of approaches that emphasize data over artificial intelligence model. The development of the concept was motivated by the need to eliminate training as the means to enable fast or perpetual system adaptation and update, and also vastly reduce pre-processing times. This characteristic can be extremely valuable in situations when new data are regularly becoming available and utilized to increase the MI accuracy with minimal delay, or when the represented system changes with time. A characteristic of the proposed data–defined MI approach is that of introspection;it can be queried to locally estimate the system error at any data point that is part of its data set and potentially act accordingly. To provide evidence of the validity and performance of the approach, we first demonstrate on classical hand-writing classification of numerical digits. We then apply it to a challenging problem of identifying the properties of bi-linear elastoplastic material using a single full-field strain tensor image of a synthetic experiment. The validation test is performed for many untrained instances, and the histogram, mean and maximum errors are discussed. We also discuss several interesting capabilities that a data–defined concept enables. copyright © 2024 by The United States Government.

关键词： Tensors

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cONcEPT cHAINING PATTERNS DURING IDEATION USING DIGITAL TABLETS

CONCEPT CHAINING PATTERNS DURING IDEATION USING DIGITAL TABL...

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asme 2024 International design engineering technical conference. and computers and Information in engineering conference. IDETc-cIE 2024

作者： Das, Madhurima Meza, Jessica Xu, christine Yang, Maria c. Massachusetts Institute of Technology 77 Massachusetts Avenue CambridgeMA02139 United States

ISBN: (纸本)9780791888407

Digital tablets are becoming increasingly popular as a sketching tool, in part because they allow designers to store many sketches in one place and to easily switch between types of sketching tools. These tools include features such as smoothing lines and copy/paste that aim to improve ease and quality of sketching. The ability to copy and paste elements of drawings affords designers the possibility to quickly modify and iterate on sketches, which may in turn influence the way in which designers engage with concept generation. This potential impact of digital sketching tools on concept evolution patterns has been minimally explored in a qualitative manner but not quantitatively. We present the results of a controlled human subjects study that investigates how the use of tablets (iPads) may influence concept evolution patterns when compared to pen and paper sketching during an engineering design concept generation problem. We explore two main research questions. First, whether or not tablet use for sketching, as opposed to paper and pen sketching, is linked with more concept chaining (sequential iteration on a concept). We hypothesize that ideation on tablets will be linked with more concept chaining due to sketching features on the tablet such as copy and paste. Second, we ask whether or not concept chaining patterns will be different for design prompts that have multiple functional requirements. Here, we hypothesize that the concept chaining patterns for the primary functional requirement of a multi-component prompt will be consistent with the patterns of concept chaining for a prompt with only one requirement, but that secondary functional requirements may not exhibit these clear chaining patterns. We find that tablet users demonstrate more concept chaining than paper and pen users despite having a similar number of related ideas overall. We also find that concept chaining patterns do change for design prompts with higher numbers of functional requirements especia

关键词： Requirements engineering

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APPLIcATION OF A cONTINUOUS VARIABLE DENSITY INFILL: MANIPULATING cENTER OF GRAVITY

APPLICATION OF A CONTINUOUS VARIABLE DENSITY INFILL: MANIPUL...

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asme International design engineering technical conference. / computers and Information in engineering conference.(IDETc-cIE) / 49th design Automation conference.(DAc)

作者： Murphy, Patrick N. Khoda, Bashir Univ Maine Dept Mech Engn Orono ME 04469 USA Adv Struct & Composites Ctr Orono ME 04469 USA

ISBN: (纸本)9780791887301

In mechanical design mass properties, such as center of gravity and total mass, are an important consideration. As such the distribution of mass, i.e., the effective density distribution of a part, is a key consideration. When producing parts with additive manufacturing techniques like Fused Deposition Modeling, parts are typically hollowed to reduce manufacture time and replaced with a uniform infill structure. This process will affect the mass properties and provides only adjustment to the total mass. However, manipulating the center of gravity of a part can beneficial as it can change the total mass, moment of inertia, and vibration response of a part. Methods have been proposed in the past like the works of chiu et. al., Yamanaka et. al., and Grigolato et. al. with each seeking to overcome certain limitations. In this paper, a method is proposed for the manipulation of the center of gravity of an additively manufactured part. The method first creates a density distribution with the desired mass properties then a novel process-aware continuous variable density infill algorithm is utilized to create the infill structure. With this algorithm it is ensured that a manufacturable functionally graded infill structure can be generated. The algorithm proposed for realizing this density distribution achieves this in two steps: variation of extrusion line spacing and width of the standard rectilinear infill pattern. This paper focuses on a 2D case, as implementing variation in the z axis was shown to be trivial. The methodology has been implemented within MATLAB to first generate the density distribution, then apply the continuous variable density infill generation algorithm, and finally generate the g-code. All sample prints were made with an extrusion- based, fused deposition modeling (FDM) printer. A preliminary test showed inconsistent behavior from the variable extrusion width. As such, each test case was printed with and without the variable extrusion width to furthe

关键词： Shapes Matlab design engineering Algorithms Extruding Density Modeling Vibration center of mass Errors Inertia (Mechanics) Additive manufacturing

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