Examensarbeten på grundnivå // Basic Level Theses

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Redesigning a hydraulic subsystem for a Volvo hauler, focusing on cost efficiency
Andersson, Magnus; Oldberg, Einar; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Hammersberg, Peter; Hammersberg, Peter
The modern day hauler is a piece of heavy machinery used in moving large payloads within and between worksites. As the payload of the vehicle increases, so does the need for a robust and reliable hydraulic brake system, ensuring the safety of both the drivers and their surroundings. One of the companies working on producing and improving these machines are Volvo Construction Equipment [VCE] , who since 1966 have been in the forefront of engineering in this field. The aim of this thesis is to conduct a concept study for VCE regarding an upcoming design for a hydraulic system and to provide alternatives to reduce the overall price of the system, as well as the quality in regards to performance and leaks. The current design, serving as a reference to the project, includes a lot of complexities and has issues pertaining to the mounting of the system and the cost of production. This is due to several factors, including the narrow areas between components, overlapping parts, as well as the complexities of several valves and blocks. As the current design of the system is known, a reference for the layout and function is included, as well as an understanding of which functions are essential. Using the standards of product development and testing the systems layout and performance, this study explores a few different alternatives to the current concept by VCE and provides recommendations from the group, as well as aspects of the design that can be developed further by the engineers at Volvo. The proposed solutions have been put through a process of matrices and designed in the design program CATIA V5 . In the end of the project a few results were concluded. Firstly a digital construction of the hydraulic system with modifications to the hydraulic distribution, layout and newly constructed blocks. This system is meant to serve as an inspiration for VCE to further develop their system in the future. Secondly two smaller concept studies were evaluated, where an attempt of moving a key component was made, as well as a concept replacing the hydraulic hoses with metal tubing. These concepts were deemed unfit for further development, serving as a concept study as recommendations to not develop further. Lastly a looser concept study was conducted to recommend the further development of an idea of merging several of the components in the design. This was never modeled, but serves as a recommendation to VCE for future research. Based on this investigation there are still factors that can be evaluated for further improvements. Thus, the results and discussion of this thesis may serve as a basis for what concepts that are and aren’t relevant for future research.
Förbättrad operatörsinteraktion i kontrollrum för högre effektivitet, ökad kvalitet och kostnadsbesparingar
Vojinovic, Andreana; Johansson, Henri; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Ylipää, Torbjörn; Hellberg, Jill; Lindahl, Martin
Control rooms for monitoring and steering play a very important role in many industries, yet this area is underappreciated and rarely discussed. It is often an invisible – but incredibly important – part that constitutes the heart of production. Despite their underestimated role, such rooms are of great importance in ensuring the quality and safety of production flows. This makes it important to deepen the knowledge about control rooms. This project has been initiated by Volvo Cars, which manufactures passenger vehicles. Volvo is characterized by safety, quality, innovation, and sustainability. The company produces modern, safe, high quality cars with people at the centre. They believe that working towards enhancing control room operations can increase production efficiency and product quality. The project has been carried out as a mechanical engineering degree project at Chalmers University of Technology. The aim of the project is to contribute greater insight into and deeper understanding of the complex challenges that exist in a control room in order to enable the development of better control room operations in the future. Observations of the control room in the paint factory, interviews with control room operators and benchmarking against control rooms in other factories led to a better understanding of control room problem areas. The thesis presents the results from the methods used, where focus was on identifying, describing and explaining control room design problem areas and capturing insights from control room solutions in other factories. The results reveal that many control rooms experience the same issues to a greater or lesser degree, aspects that are highlighted in this project. The conclusion is that it is entirely possible to design a more modern, efficient and work environment-friendly control room, as long as there is a strong cross-functional collaboration with the end user in focus
Utformning av en elbilsbatterisimulator för en säker och effektiv lärandesituation
Axelsson, Josefin; Lundgren, Joel; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Hammersberg, Peter; Hammersberg, Peter
here is a lack of technicians in the fast-growing electric vehicle market of today. Furthermore, the technician's first interaction with a battery is in a high-voltage environment. In this thesis, a physical product is designed to simulate an electric vehicle battery. This ensures a safe and effective learning environment for training technicians. To uphold this, the product is to achieve the perception of a substantial scenario. By studying technicians performing the scenarios and completing a literature study of the functioning components the requirements were defined for the product and its components. Thereafter key components were identified and selected as well as their arrangements and functions. The simulator is designed to allow the technician to practice their actions on welded contactors, loss of isolation and broken fuses. Demounting of the Manual Service Disconnect (MSD) and battery case are also included as well as a simulation to control the functionality of the battery. Together with the layout of the product, the scenarios are achieved by using specific measurements of voltages and relays, with a specified service procedure for each scenario. The concept divides the functioning of the company-provided electronic solution from the visible battery from the technician. Furthermore, the layout features a framing of the battery, selectively showing the technician the most important components in an arrangement that communicates the continuous modules of the battery. The electric vehicle market is under a fast development which could impact the solutions made through the project. However, the product is modular and could easily upgrade an individual component as well as a larger amount of components to fit the current market need
Responsible design and conscious material selection for a reduced environmental impact of the indoor lighting industry
Haraldosson, Cornelia; Mielcarek, Marcin; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Hammersberg, Peter
In response to the pressing climate crisis challenges facing society, there is a critical need for industries to transition towards a circular economy, encompassing entire production chains. Ateljé Lyktan, a company specializing in innovative lighting solutions, aims to reduce its environmental impact through the selecting of sustainable materials. This thesis investigates potential sustainable materials for indoor lighting products through a comprehensive situation and life cycle analysis of an existing product in ateljé Lyktans’s range, coupled with extensive literature research to identify current market alternatives. The study identified several material options, focusing primarily on biologically based polymers and polymer composites. These alternatives were evaluated using a two-step methodology. The initial screening employed both the chart method and a questionnaire method, while the following ranking process utilized a decision matrix to pinpoint the most promising materials according to this study. The findings highlighted two promising candidates: polylactic acid (PLA) and the composite Biodolomer I. However, neither material fully satisfied all requirements, particularly in terms of durability necessary for the long lifecycle of indoor lighting products. Further investigation into fiber reinforcements, which can enhance the mechanical properties and longevity of bioplastics, revealed flax and hemp as suitable options. Additionally, the fibers OnceMore and FibraQ were recommended for further testing. The study underscores the necessity for developing sufficient end-of-life infrastructure, including new technologies for recycling and composting, to facilitate the large-scale adoption of bioplastics and fiber-reinforced materials. The conclusion calls for ongoing research into sustainable material alternatives and emphasizes the imperative for industries to intensify efforts towards sustainability. This includes the development of robust infrastructure for material recycling and composting, essential for achieving a circular economy
OPTIMERING AV PACKNINGSPROCESSEN, En studie inom e-handeln och vikten av en effektiv packningsprocess
Bäckdahl, Jonatan; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Johansson, Björn; Örtengren, Roland
The e-commerce market is highly competitive, with companies vying for customers purchasing power. It is therefore crucial for companies to deliver their orders smoothly and quickly, not only from economic standpoint but also with a focus on customer experience and environmental impact. The purpose of this study is to identify possible solutions to optimize the company´s packing process to ensure its continued leadership and competitiveness in the market. This qualitative study was conducted at the company Company through semi-structed interviews with employees who have deep insights into the packing process. The study was complemented by data from the company´s internal systems, observations, measurements of processes, and testing of the process built in a simulation program. The study reveals the current state and functioning of the packing process. Based on the analysis, the author has identified processes and areas that can be optimized. Proposed improvements include a better system for monitoring the packing process, the introduction of multiple size options for boxes, smart automated solutions to maintain a smooth production flow, and reduce lead times. The consequences of the current packing process include uneven production efficiency, varying customer experiences, and unnecessary environmental impact. By implementing the proposed improvements, these consequences can be mitigated, enabling the company to offer its customers a holistic experience that is highly competitive in the market.
VTOL, framtida drönarapplikationer i samhället
Larsson, Sebastian; Schwarzmayr, Theodor; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Melkersson, Kjell; Svensson, Elin
This report presents the development of a VTOL drone prototype, with a particular focus on mechanical and electrical components, battery selection, wing structure, and manufacturing methods. A sketch of the developed electrical system shows how power supply and signal cables are connected. The drone uses a Li-Po battery for high discharge capacity, enabling sufficient power supply to the motors and flight computer. The internal structure of the wing is designed to optimize strength and rigidity, using 3D-printed segments joined with carbon fiber tubes, in figure 0.2 is a image of the prototype in CAD. To maximize range and efficiency, the drone quickly transitions from drone mode to airplane mode. The transition is controlled by adjusting the pusher motor and drone motors’ RPMs based on speed data from the GPS and pitot tube. Conclusions show that current legislation poses a challenge for drone deliveries in populated areas, but the wing design significantly improves the drone’s range and energy efficiency. Future work includes practical flight tests and software optimization to further enhance the drone’s performance.
Effect of heat treatment and batch-to-batch material variations on microstructure of C38 steel
Xia, Jinlu; Addo, Suleyman; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Holmqvist, Gustav; Salame, Charlie; Hoier, Philipp
Despite steels from different manufacturers abiding by the same standard specifications, tool wear during grinding of these materials seems to progress differently when comparing batch to batch. Therefore, an investigation was made into the different batches in order to explain this difference in grindability between them. Samples of C38 steel from two different batches were used and heat treated in the same way at three different temperatures. The techniques used in this investigation to assess the difference between batches were light optical microscopy as well as hardness testing. Some differences were observed between the batches before heat treatment but after the heat treatment had been performed there were no differences that could be discerned with an optical microscopy. The hardness tests showed a very small difference where one batch was harder by a maximum of 10 HV. With the tools used in this lab no differences that could lead to a variation in grindability was found. To further investigate the question, more tests need to be run.
Utveckling av handtag integrerade med SpaceMouse-styrning
Andersson, Andreas; von Dolwitz, Hanna; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Evertsson, Magnus; Evertsson, Magnus
In today’s industries, lifting devices are common and often necessary. There are various types of lifting devices, ranging from cranes, forklifts, robots, and conveyors. Hofpartner’s lifting device Liongrip X is one of their newest and largest industrial lifting devices. Liongrip X can manually handle loads of up to 800kg and has high precision due to its multi-jointed arm, which provides a large range of motion. Today, Liongrip X is equipped with a control panel where the lift is operated using two industrial SpaceMouse controls. SpaceMouse is a commonly used CAD tool but is also used as a control device for industrial purposes. SpaceMouse can be easy to handle for those who are experienced, but users of Liongrip X have encountered difficulties in controlling the lift. On behalf of the manufacturer Hofpartner, this work will involve product development of handles integrated with SpaceMouse. The issue with Liongrip X is how the user handles the SpaceMouse. The SpaceMouse is programmed with specific degrees of freedom. Movements forward, backward, up, down, and sideways are programmed for the lift. A movement that doesn’t register is tilting forward or backward or sideways. In this report, tilt, tilting, and tilt function will be mentioned several times. The meaning of this is that the SpaceMouse is subjected to a rotational movement corresponding to tilting, similar to a ”joystick”. The product development for this work will focus on finding a solution that prevents tilting and provides an ergonomic handle for the user. The work has been carried out step by step according to a product development methodology. The first part of the work describes the product as a whole from the customer’s perspective and provides a clear picture of the different functions of the lift. Further on, the work shifts focus solely to the concept development of a handle
Development of a method to measure serviceability and reparability of engines
(2005) Johansson, Fredrik; Jufors, Martin; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Automatisering av hydraulslangstillverkning
(2005) Eckerberg, Andreas; Lange, Axel; Ljungqvist, Peter; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Framtagning av liftkonstruktion för blodvagga vid Sahlgrenska universitetssjukhuset
(2005) Hansen, Peter; Johansson, Fredrik; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Underhållskoncept för optimering av driftsäkerheten på Dickson PSC AB
(2005) Gbehi, Vincent de Paul; Johansson, Conny; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
A study in necessary prerequisites for Carry Over at Volvo Car Corporation
(2005) Grottling, Mikael; Rung, Patrik; Jarlegren, Martin; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Analys av produktionslinje, potential för effektivisering
(2005) Johansson, Mattias; Helmersson, David; Nilsson, Mattias; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Koordinering och visualisering av externa krav i ett ledningssystem. En studie utförd på Autoliv Sverige AB
(2005) Karlsson, Magnus; Sjöberg, Erik; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Helautomatiserad påfyllningsprocess av oktabin med bottentömning
(2006) Carlsson, Andreas; Lunde, Håkan; Scherdin, Oskar; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Förslag till konvertering av gasmotor till etanoldrift
(2006) Andersson, Patrik; Jönsson, Tommy; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Konceptutveckling av kupévärmare för optimal avfrostning av vindruta
(2006) Andersson, Kristina; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Konstruktion av en universal detaljprintermaskin
(2006) Kellerman, Magnus; Sandberg, Peter; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Optimering av robotceller
(2006) Edman, Joel; Roth, Clas; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development

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