Examensarbeten på grundnivå // Basic Level Theses

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A mapping and a concept of an ergonomic test method of rubber plugs and hotmelt covers at Volvo Cars Co
(2006) Lundberg, Jesper; Senften, Richard; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
A profitable implementation of collaborative robots - A safe and affordable way of increasing production rate and quality
(2023) Bredvad-Jensen, Johan; Johansson, Jakob; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Hammersberg, Peter; Theander, Annika; Gustafsson, Marcus; Valsamidis, Nikos
At Volvo Powertrain in Skövde combustion engine cylinder heads are casted at foundry 2. Most of the manufacturing of their products is fully automated, but the assembly of the sand cores prior to casting for the D6 and D4 cylinder heads is manual, since they are produced in smaller quantities. At the current workstation the manual assembly creates a bottleneck, due to problems with the production and error rates. Volvo Powertrain therefore wants a study performed about the possibility of using collaborative robots for the gluing of the sand cores. To find a suitable concept for a new workstation a requirement specification was created. With idea generation methods, concepts were created and later evaluated using decisions matrices until a final concept remained. In unison with the decision matrices. A simplified risk assessment was performed and data from recordings of the current production was acquired. The data acquired was then statistically evaluated with the three-point method. This was then used in the visualisation. After the visualisation a simplified ergonomic and economic evaluation was performed. The final concept consisted of two collaborative robots of the model FANUC CRX-25iA, one with a moving pedestal and one with a permanently placed pedestal. The movable pedestal opens for the use of the FANUC robot at other parts of the factory. The end effector of the FANUC robot has a glue gun attached to it that will disperse glue. A camera mounted on a beam in the workstation is used to scan the position of where the glue should be applied. The current workstation uses a telfer with a manual glue gun attached, by keeping this the flexibility is kept. In addition, preventative measures used in the risk assessment is added to the workstation. The authors recommend the implementation of collaborative robots for the manufacturing of the D6 and D4 cylinder heads. The findings in this thesis indicates a potential increase of production rate with 44%, with less errors and high degree of safety. Also, the ergonomic evaluation points towards that the operators will experiencing less strain compared to the current workstation. The risk assessment reveals that this solution can be implemented with acceptable levels of risks to the operators and the property of Volvo Powertrain. The implementation of collaborative robots is assessed to be economically justifiable due to the payback time being 0,6 years. The authors assess that the positive effects that apply to the D6 cylinder head will also apply to the D4 cylinder head. An implementation of the solution that the authors present would increase the knowledge at Volvo Powertrain and enable new exciting projects with collaborative robots in the future.
A Proposal of a New Endfill Interface Solution for an Inflat able Curtain
(2007) Landquist, Tomas; Engberg, Carl-Johan; 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
A sustainable company in a consumption driven market: How can the choice process of a conscious customer be simplified
(2019) Blomén, Joel; Magnusson, Alfrida; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Almius, Håkan; Almius, Håkan; Heinerud, Johan; Knubbe, Oskar
This bachelor thesis explores the textile industries sustainability efforts, how the leading sustainability brands are working with sustainability and how their work can be evaluated and visualized in an understandable way for the customers. The work was divided into two main research questions; How does design affect clothes sustainability? and how can we simplify the choice-process for the sustainable-conscious customer? Currently there is a trend in the fashion industry called Fast Fashion. It uses people’s consumption behavior to buy more than they need and has great negative effect on our environment. There are other methodologies that companies can follow to produce and design clothes, which prioritizes sustainability, but very few actually measure the impacts. Finding web shops, or any retailer, that guides the customer’s in a better direction is very rare. By studying the current research on designing for sustainability, interviewing professionals and a researcher, a foundation was made. It is common that designers, even at the most sustainable companies, does not have a name on how they design for sustainability, even though they do. Furthermore, it was very rare with tools that measured the sustainable impact, and the once that did were critiqued. Based on this groundwork the result of research question one was built. To find the answers to research question two, benchmarking, workshops and user studies were conducted. The biggest problems were enabling the information for user’s with completely different knowledge and interest, making the evaluation model more intuitive and reliable and establishing Vindpinad’s identity. The result of research question one was a way to divide companies in the different categorization unaware, aware and progressive. An inquiry was developed to guidance the categorization. It was based on design thinking and it analyses a company through its purpose and methodology when developing a product. Research question two resulted in guidance for further development of Vindpinad’s website, identity and their evaluation model. It had a playful expression, fluctuated the website to be more informative and it had a strong idiom towards Vindpinad’s logo. The questionnaire, together with the developed web shop, will have a bigger audience, make a bigger impact and nudge the consumer into having a more sustainable consumption behaviour.
An app compatible with a sewing and embroidery machine
(2018) Bagge, Johan; Gillström, Nanny; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science
Analys av automatisk och manuell kvalitetssäkring
(2020) Sokoti, Hasan; Aldin Krish, Aemad; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Fasth Berglund, Åsa; Salunkhe, Omkar; Tarrar, Malin
This project was carried out at the Stena Industry Innovation Laboratory at Chalmers University of Technology in Gothenburg. The client Volvo Penta wants to run an automated quality inspection in the last stage of production before sending the products to the clients. The purpose of this report is to analyze the possibilities of using a vision system to run a quality inspection in the final department in the production. Quality inspection is the last step in the production. Because of competitiveness and globalization quality inspection is one of the most important steps in the production. When products are completed and ready to send to the clients a quality inspection has to run on them. Today the quality inspection is done manually of the personals to be sure that everything is as it should. Considering that a new technology could bring efficiency in manufacturing, increase productivity and improve ergonomics, an automated quality inspection seems as a step forward in the modern industry. Automated quality control in this thesis work will be investigated using collaborative robot applications UR3e and vision systems Wrist Camera. This experiment with visions system and even previous studies in this area shows that using an automatic quality inspection is possible.
Analys av bottenskrapa för kokare
(2012) Ek, Johannes; Chalmers tekniska högskola / Institutionen för material- och tillverkningsteknik; Chalmers University of Technology / Department of Materials and Manufacturing Technology
Analys av dörrproblematik - En studie om svårstängda dörrar vid Volvo Cars Torslanda
(2016) Andersson, Johan; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Analys av hållfastheten i en styrkolonnsprototyp
(2012) PERSSON, ROBIN; CONRADSSON, JONATAN; Chalmers tekniska högskola / Institutionen för material- och tillverkningsteknik; Chalmers University of Technology / Department of Materials and Manufacturing Technology
Analys av kapacitetsökning i fosfateringsanläggning och dess konsekvenser
(2006) Persson, Fredrik; Andréasson, Per; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Analys av kostnadsvariationer i en prototyprealiseringsprocess i bilindustrin
(2018) Bengtsson, Hanna; Nilsson, Desiree; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science
This project was conducted at a relatively new enterprise in the automotive industry. The goal was to find the reason for cost variations when building boxcars. This was a process analysing project conducted using the Lean Six Sigma methodology. First thing was to map the process, since the current boxcar process was undefined and therefore unclear, even for the employees. The boxcar process has many process steps, involving handovers to different functions, a long lead time and much manual labour. Many boxcar parts are subject to deviation during the process and needs to be re-ordered, which causes time delay and excessive costs. When working with this project, it was early discovered that important basic statistics that should be easy to find, was not. Today it is hard to keep track of where the money goes since several Purchase Requisitions (PR’s) are used for the same boxcar and sometimes the same PR is used for different boxcars. To be able to keep track of the cost for each boxcar, a suggested action is to only make one PR for each boxcar status. The costs should be tracked and visualized in, for example, a control chart. The quality of the collected data for this project affects the validity of the results. Available statistics for example boxcar costs, reasons for deviations and number of deviations has a low precision. This report relies on a correlation between number of deviations and total cost and between lead time and total cost when building boxcars. This statement has not been proved, but should be further investigated. Working with the project, it became clear that one of the departments that supply input for the process, are not aware of their importance and involvement in the boxcar process. This means that working with the boxcar process is extra work for the engineers at this department. Therefor another suggestion of improvement is to start a discussion whether it should be a part of the engineers’ job description.
Analys av mätmetoder för möbelljud
(2018) Danielsson, Gustav; Johansson, Rikard; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science
To develop more lenient environments it is important to minimize the amount of ambient noise. As it is today there is no solution to compare the amount of sound that furniture excites when they’re prone to a force. Therefore the market and producers need a standardized way of comparing the amount of noise that, for example a table-top will make in a open environment. The ambition of this thesis is that it will be a part among other thesises leading to a standard way of measurement of tables. The thesis have been performed at RISE Research Institutes of Sweden. The work contains a business intelligence that will be the foundation of the case study that has been analyzed. The case-study contained a tapping machine, a impulse hammer, a shaker and a steel pellet which were tested in a half anechoic room. The results were measured with accelerometers and microphones. The result was that the tapping machine was considered the optimal method of the ones available, for standardization there would preferably be more supporting facts. There are many factors to be observed and compare their the importance of them. One thing that is very important is the amount of time needed to do the measurement, the reason for this is that the biggest cost is personnel. The amount of measurements is assumed to be many and therefore the cost of the device for the measurement will be less significant. It’s also important to consider if it might be worth developing a new device that can be used for simular tasks, otherwise a simpler more specific device might be more relevant. In summary, to come up with a standardized measurement method there is a bit more work needed, this thesis contains a solid foundation to continue working from. The thesis does not contain any new method but decribes a couple that exist in other branches of industry. Some of the methods are modified to fit the chosen object. The measurements are carried out, evaluated and then compared to one another.
Analys av möjligheten att svanemärka en tvättstuga
(2008) Karlsson, Mattias; Öjersson, Mathias; 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
Analys av risk för utmattningsskader på högspänningskablar vid fogning till havs
(2023) El-Zein, Alexander Hani; Parviz, Erfan; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science; Hammersberg, Peter; Hammersberg, Peter
Global conditions have forced humanity to look for new methods to generate renewable energy. At the forefront of this innovation is NKT HV Cables AB in Karlskrona with the promising as well as effective method to generate electricity through wind turbines in areas named Offshore wind turbine parks. Large quantities of electricity are produced through wind turbines that are located at sea which need transportation to land via high voltage cables. To maximize this energy production, more and more wind turbines are located further out at sea which means that high voltage cables need to be jointed on a vessel at sea. The jointing operation can take several days, during this process, the cable is hanging from the vessel which can cause damage. Waves and movement of the vessel can cause bending motions along the cable which can be problematic for a longer period. It is necessary to ensure that no critical damage is induced on these high voltage cables as it can cost the company not only precious time but also a lot of money. NKT has developed a new sensor that can monitor bending variations during a jointing operation. The goal of this thesis is to develop the process and provide graphs used by data from the sensor, that can be analyzed and finally discuss the possible damage. MATLAB is used in order to produce the plots and graphs. 25 plots are presented at the result chapter which show the curvature variations in x and y axis and how the cable bends for one hour surveillance. Rainflow diagram is also presented in this chapter which indicates the number of cycles and corresponding curvature variation. The result and the effect of these cycles and variations is discussed in the last chapter. The accuracy of the result and method is discussed as well. Further, a conclusion and judgement to determine if the result is useful and valid, and whether NKT has been able to achieve their objectives with the project and if the cable has been damaged to a dangerous level.
Analys av skyddsbur och kaross för en formula offroad buggy - FEM-analys av skyddsburen för materialval och design
(2016) Visser, Sven; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Analys av Takstol typ A utan dragstag
(2021) Alfredsson, Anders; Tydén, Emil; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Ahlström, Johan; Ahlström, Johan
The thesis work has been executed on behalf of Vara Byggkonsult AB, a company that works with a big variety of tasks including construction calculation and building permits. The project was first intended because of a fear that a truss produced by Bjärke Takstolar AB shows incorrect values in deformation. Results from the project is based on a real-life experiment where different types of trusses have been put under load. Corresponding deformations has been measured and analysed to find out how the trusses are behaving under stress and how deformation of them can cause problems in houses. With help from these results a modified truss has been engineered to decrease deformation but at the same time retain the characteristics of the truss that enables high clearance. This model is based on the original truss but includes a pull rod that connects both sides of the truss. The pull rod has the dimensions 45 mm * 120 mm and is placed 885 mm from the underside of the truss. This is estimated to be enough to achieve the given values of deformation and at the same time remain a feasible and economical solution.
Analys och förslag på optimering av produktionsflöde
(2016) Ström, Viktor; Chalmers tekniska högskola / Institutionen för produkt- och produktionsutveckling; Chalmers University of Technology / Department of Product and Production Development
Analys och konstruktion av fjäderutmattningssystem
(2019) Berg, Marcur; Källman, Nils; Chalmers tekniska högskola / Institutionen för industri- och materialvetenskap; Chalmers University of Technology / Department of Industrial and Materials Science
Lesjöfors AB avser att i olika sammanhang presentera tekniken kring en unik variant av ett fjäderutmattningssystem på mässor och liknande sammanhang. För att möjliggöra detta behövs en mindre, mobilare variant av ett redan existerande fjäderutmattningssystem producerat och ägt av Lesjöfors AB. Systemets huvudsyfte är att demonstrera den unika tekniken men används även för att utföra tester på mindre fjädrar. Projektets fokus kretsar kring processen att skala ner och omkonstruera det befintliga systemet till ett system passande för uppgiften utan att äventyra dess fundamentala syfte eller effektivitet. Arbetsprocessen involverar validering av systemets unika momentfördelning med hjälp av MATLAB grundat på givna geometriska parametrar. Samtidigt skapas CAD-modeller, hållfasthetsanalyser, måttsättning, helhets -och detaljritningar samt rekommenderad produktlista och drift av systemet. Den slutgiltiga konstruktionen erbjuder ett lättöverskådligt och kompakt system vilket uppfyller de krav arbetet grundas på. Nyckelord:

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