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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Smart Process for Automated Engineering Tasks : A case study at Volvo Group Trucks Operations

Väänänen, André January 2020 (has links)
Volvo Group Trucks Operations is a subordinate organization to the Volvo Group concern, which is one of the world's largest manufactures of trucks, buses, construction equipment, marine and industrial engines. Volvo Group Trucks Operations organization encompasses all production of the Volvo Group’s engines and transmissions as well as all production of Trucks. Volvo Group Trucks Operations is looking into digitize the methods utilized for information handling within their assembly plant in Tuve, Sweden, and this thesis project part in the digitization process.  The currently used assembly work instructions at the assembly plant in Tuve are printed on paper and contains excessive amounts of information that makes it challenging for the assembly operators to consume the work instructions efficiently. Therefore, Volvo Group Truck Operations want look into the possibility to introduce dynamically adjustable and digital work instructions that could be tailor fitted to an operator's experience level and presented with smart technologies. The project is divided into two parts where the first part was assigned to identify the information need for smart process capable of generating dynamic digital work instructions and the second part to research how this information need could be satisfied with currently used simulation tools. The information needs analyses showed that the smart process needs to be divided into two sub-processes, one for gathering and processing production specific data into a fully detailed work instruction and the other one for filtering the fully detailed work instruction to tailor fit an operator independent of their skill level within assembly work. A framework containing three information aspects is stated to describe the information need for the smart process. These information aspects are Inputs, Smart process and Outputs. The information aspects are then further broken down into five required information areas that is important for the smart process functionality. The required information areas are Data, Attributes, Inputs, Instruction and Information structure and Instruction consummation. When combining the results for the information aspects and the required information areas, the framework for the smart process needed to be able to generate dynamic digital work instruction could be stated. Using the simulation software IPS IMMA to simulate a generic assembly demo case to generate and export production specific data in the human readable XML coding language showed that it is possible to satisfy the framework for the smart process. However, comparing the simulated data with the information need for the framework resulted in the discovery that the IPS IMMA version used in the project, PMTS event exporter, withholds information regarding the assembly work. The generated data provides information regarding movement distances, movement times and grip types when interacting with work objects. For the smart process to be able to generate fully detailed instructions it needs to be supplied with additional information regarding the work objects in action and directions of movements conducted during the assembly work. Despite this withhold of information from the export data, it would still be possible to fully satisfy the framework for the smart process. All the missing information is contained within the IPS IMMA hence the software needs an update that adds the additional information to the data export.
2

Prerequisites for Automatically Creating Work Instructions in Augmented Reality for Assembly of Gripen E : a case study at Saab Aeronautics

Kamran, Skander, Mäkelä, Alexander January 2020 (has links)
This thesis work has been carried out at the company Saab AB Aeronautics, which manufactures the military aircraft Gripen E. Today, the company uses 3D work instructions for assembly of Gripen E, which is displayed on a computer screen for the shop floor workers. The company has an interest in investigating whether today's work instructions can be visualized in an Augmented Reality interface by reusing available data. This work has been limited to studying wire harness assembly, which is a main part of the final assembly. The methodology case study in combination with the method Requirements Engineering has been used to analyze the company's possibilities. Data collection has been conducted with internal interviews, studying internal materials and internal courses. The result chapter contains two parts, where the first part presents a situation analysis of how today's work instructions are created in the software DELMIA and what data that is needed. The second part presents a requirements specification for an Augmented Reality Work Instruction for assembly of Gripen E. In the discussion, the situation analysis is compared with the requirements to answer which data that could be reused for creating Augmented Reality Work Instructions and what challenges that may arise. This study shows that the company has prerequisites for creating work instructions in Augmented Reality, as there is available data containing 3D models structured according to an assembly sequence with associated descriptive information.
3

Beyond Traditional Ergonomics: Novel Tools for Assessing Finger Strain at Volvo Trucks : Methods for measuring finger strain during assembly

Limrell, Gustav, Marberg, Cajsa January 2024 (has links)
This thesis explores innovative methodologies to assess finger strain during the assembly process atVolvo Trucks in Tuve. With the increased complexity and frequency of tasks in truck assembly, particularly with the shift to electric truck production, ergonomic concerns have risen, notably around the strain on operators’ fingers. Our project aims to identify a reliable and precise tool to measure the forces exerted on the fingers during these assembly tasks, addressing the limitations of current dynamometers which struggle in confined spaces, on non-flat surfaces and with different types of grips. Using a combination of empirical studies, expert consultations, and ergonomic tool evaluations, we evaluated various measurement tools and technologies. The study involved detailed observations and interviews at the assembly plant to identify critical ergonomic challenges. We then tested selected devices under real-world conditions to evaluate their effectiveness in capturing accurate force measurements. Our findings suggest that the integration of advanced sensor technologies can improve ergonomic assessment of assembly tasks by providing more accurate real-time data. This would allow for a better design of tools and work processes, ultimately improving worker safety and productivity. / Det här examensarbetet utforskar innovativa metoder för att bedöma fingerbelastning under monteringsprocessen hos Volvo Trucks i Tuve. Med en ökad komplexitet och mängd av arbetsuppgifter vid montering av lastbilar, särskilt med övergången till produktionen av eldrivna lastbilar, har de ergonomiska problemen ökat. Särskilt vad gäller belastningen på operatörernas fingrar. Vårt projekt syftar till att identifera ett tillförlitlig och exakt verktyg för att mäta de krafter som utövas från fingrarna under dessa monteringsmoment, och att adressera begränsningarna hos nuvarande kraftmätningsverktyg som har svårt att användas i trånga utrymmen, på ojämna ytor och vid olika typer av grepp. Genom en kombination av empiriska studier, expertkonsultationer och utvärderingar av ergonomiska verktyg, utvärderade vi olika mätverktyg och mättekniker. Projektet involverade detaljerade observationer och intervjuer i Tuvefabriken för att identifiera kritiska ergonomiska utmaningar. Vi testade sedan utvalda produkter under verkliga förhållanden för att utvärdera deras effektivitet i att fånga krafter från fingrarna. Våra resultat tyder på att integrationen av avancerade sensorteknologier kan förbättra den ergonomiska bedömningen av monteringsmoment genom att tillhandahålla mer exakt realtidsdata. Detta skulle möjliggöra en bättre utformning av verktyg och arbetsprocesser, vilket slutligen förbättrar säkerhet och produktivitet.
4

Rotator assembly at Indexator

Lundström, Jonathan, Hörnberg, Emil January 2017 (has links)
The thesis is concerning rotator assembly at Indexator. A need to increase production has been seen and it can be done by implementing an optimized assembly process. In addition to the assembly process a new design on workstations and new test equipment is needed.The study resulted into three assembly process proposals. The processes were balanced, layouts were produced and Plant simulation was utilized to produce simulation models. Each proposal were analyzed based on cost, performance, ease of implementation, flexibility and worker condition. This resulted in a stationary assembly process being most promising and a 3D simulation model was produced for visualization and better understanding. The stationary assembly process has a capacity for 90 rotators per day, while reducing the amount of workers by one.The layout of the workstations was done based on the assembly process layout and further developed to make the work cell lean and ergonomic. It resulted in three workstations to perform the assembly. The test bench was developed by creating target specifications, establish a test procedure and decide components for the test bench layout. The finished test bench can measure dynamic torque, count particles to ensure cleanliness and is able to run the test unattended. / Examensarbetet handlar om montering av rotatorer på Indexator. Målet är att ta fram en optimerad monteringsprocess som kan implementeras i Indexators fabrik utan svårigheter. Den nya monteringsprocessen kommer kräva en ny design på arbetsstationerna och nya testbänkar.Fyra koncept på monteringsprocessen togs fram, baserat på monteringens behov och målsättning. Efter utvärdering så modifierades de fyra koncepten till tre förslag på monteringsprocesser. Processerna balancerades, layouter utvecklades och simuleringsmodeller producerades för varje process. Varje förslag analyserades baserat på kostnad, prestanda, implementation,flexibilitet och arbetar-förhållande. Resultatet blev en stationär monteringsprocess och en 3Dsimulering gjordes för visualisering och förståelse. Den stationära monteringsprocessen har en kapacitet på 90 rotatorer per dag och reducerar behovet av montörer.Layouten för monteringsstationerna baseras på processens layout och har modifierats för ergonomiska aspekter. Inom monteringsstationerna så utvecklades layouten för att minimera antalet onödiga rörelser för montören. Testriggens design utvecklades genom att analysera de behov som fanns, skapa en kravspecifikation samt utvärdera och besluta om testprocedur, upplägg för testrigg och dess ingående komponenter. Testriggen uppfyller målsättningen som är att kunna mäta dynamiskt vridmoment, räkna partiklar för att säkerställa renhet i rotatorn och kunna utföra testningen självgående för att frigöra montören under testprogrammet.
5

Přístavba školy v Praze - stavebně technologický projekt / Extension of school in Prague - construction technology project

Brezanská, Kateřina January 2017 (has links)
The thesis contains structural and technological project extension school in Prague. It deals with the planning of the entire construction and detail solutions primarily site construction design, machine assembly, time plan of the building structure and anchoring systems for flat roofs. Further processing deals budget of main building structure, technological regulations and inspection and test plans for monolithic construction and green roof and safety plan for these works.

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