Examensarbeten för masterexamen


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  • Post
    Applying Generative Design for Development of Optimal Parts
    (2023) Andersson, Lukas; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Asbjörnsson, Gauti; Asbjörnsson, Gauti; Olsen, Tommy; Bhadani, Kanishk
    In recent years generative design and topology optimisation have been added to CAD. Tools like generative design will generate an optimal design given a model that captures the part intent. Depending on the model criteria, optimal designs may be lighter, stronger and cheaper than parts developed through conventional means. Such benefits are of great interest and companies may want to introduce such tools into their development process. In this project, a diverse selection of Volvo Penta parts is investigated using the generative design tool newly introduced to their CAD system. By reverse engineering the parts and understanding the system and requirements, a model describing the structure and volume of the part was created. Using this model several alternate parts were generated and evaluated using a cost model describing the cost of manufacturing and cost during operation. The parts generated through generative design were shown to be superior compared to the original with the performance indicator used. Drawbacks were also shown mostly relating to implementation and difficulties in defining the models.
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    Tracking for future internal logistics: How to commercialise RTLS technology at Virtual Manufacturing
    (2022) Hallén, Alice; Krajewski, Martyna; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Örtengren, Roland; Rosengren, Pontus
    Abstract As new technology emerges, the need to innovate to remain competitive increases. Stemming from industry 4.0, the smart factory concept is the heart of the Industrial Internet of Things (IIoT), where real-time tracking is an important part of intelligent manufacturing. Real-time tracking of various objects in production and warehouses are an essential control element that supports the organisation’s decision-making. When deviations and unplanned changes appear, it can supply the necessary information in the right format and at the right time. In collaboration with the consulting company Virtual Manufacturing Sweden AB (VM), this thesis project explores how tracking equipment can be commercialised to improve internal logistics. The result was a case study proving that the computer vision-based tracking system Dragonfly was fitted for indoor localisation of moving vehicles. Functions for visualisation of tracking data such as spaghetti diagrams were developed along with an early-stage standardised work method. Furthermore, the master thesis handles limitations, development areas, and opportunities within the subject of Real-Time Location Systems (RTLS) in manufacturing.
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    Engineering Change management: A study on how to develop an Engineering Change Management framework at Northvolt AB
    (2022) Siva Kumar, Raahul Kumar; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Bergsjö, Dag; Bergsjö, Dag; Eller, Enrico
    Abstract Northvolt, an explorer in battery manufacturing, has been developing various types of battery cells for different applications. For this, there is a wide range of activities involved in producing batteries successfully. This includes R&D, sourcing the raw materials, getting components from the suppliers, testing the material- part and assembly level, producing battery cells, battery module making, and finally, deliver ing the product. In parallel to these developmental activities, changes emerge, and these can be on a whole termed error correction, performance enhancements, and business-related factors. The changes can vary from a clerical change in a drawing to a supplier change that affects the entire process line. And these changes are largely iterative (plan, test and review) in nature and span for weeks. In a fast-growing organization like Northvolt, a proper system to streamline the workflow in managing these changes is essential. The main objective of this thesis is to study the current system in the company, specifically in the cell design division, and form a working framework that focuses on impact analysis. The process flow evolves with the aid of literature and feedback from the stakeholders- The aim is to use the Engineer ing change management layout on the abstract level and build a customized set-up concurrent to the organization’s requirements.
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    Control interface for teleoperated construction inspection robot
    (2022) Longnell, Fredrik; Sperr, Filip; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Aryana, Bijan; Aryana, Bijan
    This project was conducted to investigate the area of teleoperated robotic inspections at construction sites, as well as to design a prototype of the inspection robot’s control interface with a focus on usability. The interface, a web based application, allows the user to access and control the driving, tool usage and various other features of the robot remotely. The investigation into the area was conducted through two primary studies - one user study consisting of interviews with construction experts and one literature study focusing on relevant subareas of research. The data from these studies was analyzed using a modified thematic analysis approach, which yielded a number of themes and findings that formed the basis of the following design work. Throughout the design phase, concepts were evaluated using both Unity and Figma based prototypes by implementing these into usability tests aimed at identifying problems and opportunities for improvements. From the research phase, a number of interesting findings were identified. Aspects such as the chaotic nature of construction sites, allocation of user attention and situation awareness proved especially challenging in ensuring satisfactory use of the interface. Additionally, enabling the entire spectrum of construction inspections, both from very general to specific ones, dictated much of the design work. The users also placed emphasis on certain overarching principles being adhered to, such as efficiency and safety. Through a set of iterations, a final design proposal was created, covering the primary use cases of the robot. The focus was on separating the advanced features from the basic ones, enhancing the explicitness of the controls and minimizing the operators’ cognitive workload.
  • Post
    Automation and virtual commissioning of an overhead crane
    (2022) Al Shafie, Tarek; Rapphed, Fredrik; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Stahre, Johan; Salunkhe, Omkar; Sonnerup, Thudor
    SKF Mekan, a factory within the SKF Group that produces housings, locknuts, sleeves, and guiding rings for the bearing industry, aims to investigate how to re duce costs, increase capacity by increasing the level of automation in their produc tion facilities to remain as competitive as possible in a quickly evolving market. Specifically, a material handling procedure carried out by an overhead crane that delivers materials to melting furnaces has been identified as eligible for automating. The material is taken from what is referred to as a scrapyard where the inventory of metals is kept which is then gathered by a crane utilizing an electromagnet cylinder. The goal of automation is to reduce costs, clearly and accurately display inventory levels and increase the storage capacity in the scrapyard. In order to evaluate the effectiveness of the automation sequence, a virtual com missioning method was investigated. This digitalization method allows automation procedures to be tested and verified before real-life implementation. It is done by connecting three components; Programmable Logic Controller (PLC) logic which is the automation sequence, a physical model created digitally of the system to be simulated, and lastly, a logical device that connects inputs and outputs between the physical model and the PLC Logic. By connecting these the instructions given by the PLC can be executed by the physical model with kinematics and physics. This allows for a comprehensive view of the full system running digitally in a realistic environment. Some delimitations for the thesis were made. The virtual commissioning methodol ogy has been utilized but the thesis does not achieve the level of detail required to complete a virtual commissioning project of the crane’s automation, some function ality has not been implemented due to time constraints. The following results were obtained. The material hall and crane have been con structed in 3D using the Computer-Aided Design (CAD) software CATIA from Das sault systémes. An automation procedure has been developed in TIA Portal, simu lated using PLCSIM Advanced, and connected to a developed HMI using WinCC. Suggestions for sensors and additional hardware have been made, and the authors recommended additional safety measures. Neither the logical model nor the final virtual commissioning step of connecting the PLC, physical model, and logical model was completed due to not receiving the required software in the given timeframe. However, this thesis is considered a helpful framework that provides the theory and methodology to complete the virtual commissioning in future.