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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

Implementering av 3D-scanning-teknik för kvalitetskontroll : En fallstudie hos Hitachi AB

Taskin, Hakan, Sanderson, Philip January 2022 (has links)
Hitachi Energy is a world leading company in the production and installation of power transformers and the quality of their services is of the utmost importance. The majority of the company's current quality control methods are performed manually, the purpose of this study is to identify potential areas where the use of 3D-scanning technology as a method for quality control has potential, making use of interviews, literature studies and document analysis to do so. Further the study wishes to outline the specific methods that could be used to increase the efficiency of the production and present the steps that would be required for these methods to be implemented effectively.  The results revealed that both the active core and final assembly processes currently face issues. The active core assembly with specific aluminum pipes that often differ from the specified tolerances. Most of these problems come from external suppliers and get noticeable when they arrive at the active core assembly. The final assembly faces issues with the lowering down of the active core into its container. A process that can vary drastically in the time it takes while simultaneously being a very time sensitive process. The study proposes three methods as solutions to these problems. An initial control of the aluminum pipes after delivery with FARO:s Quantum Max ScanArm and CAM2 Software. As well as a simulated lowering down of the active core, making use of FARO:s Focus Laser Scanner and the software program SCENE. Lastly, a more general use of 3D-scanning for quality control. It is concluded that committing to an investment is required to reach further results.
2

Quality Control of Light Emitting Diodes : Using power factor, harmonic distortion and light to power ratios

Abdulahi Mohamed, Abdirahman, Aksel, Wännström January 2016 (has links)
This study addresses quality control for Light Emitting Diodes (LED) according to fouraspects, the power factor of LED lamps, their harmonics and total harmonic distortion (THD), the luminosity for total power to radiated power ratio. It focuses on four brands and six different LED lamps, and concludes that IKEA's LED lamps pertain as the quality lamp, with a power factor over 0.9, THD less than 4% and a power to radiated light of over 4%.
3

“Implementation of quality control in order to assure the quality of a manufacturing process within a production line” / “Implementering av kvalitetskontroll för att kvalitetssäkra tillverkningsprocessen i en produktionslinje”

Skoog, Johanna, Jusufagic, Amra January 2007 (has links)
This project is performed at Volvo Construction Equipments in Braås, which is one of the world leading producers of equipment for construction places. The quality aspect is an important factor when increasing the production in a manufacturing company and the role of quality should be highlighted in order to produce more error-free products, using cost-effective methods and tools. This case study emphasises ways of implementing quality control in order to quality assure the manufacturing process with focus on the manual and automatic handling. By standardising and analysing the collected and measured data in the manufacturing process the quality will be assured by implementation of quality control. The result of the study is to use a developed manual for implementation of quality control, which will increase the quality level. To reach the goal of this study qualitative and quantitative measurement has been used for identifying the present situation and which factors that is important when making improvements. Then interviews have been performed to define gaps in the communication between managers and operators. The conclusion is to use a manual for how to implement quality control and controlling a process. / Denna studie är utförd på Volvo Construction Equipments i Braås, vilka är världsledande inom tillverkning av anläggningsmaskiner för byggarbetsplatser. Kvalitén är en viktig faktor vid ökning av produktionskapacitet i en tillverkningsprocess då den påverkar mängden felfria produkter. I denna studie läggs vikten vid implementering av kvalitetskontroll för att kvalitetssäkra tillverkningsprocessen i en produktionslinje med fokus på den manuella och automatiska hanteringen inom tillverkningsprocessen. Genom standardisering och analysering av de samlade och mätta data från tillverkningsprocessen kommer kvalitén att säkras genom särskilt utformade kvalitetskontroller. Detta resulterar i en utvecklad manual för implementering av kvalitetskontroller vilket kommer att medföra att kvalitén förbättras. Kvalitativa och kvantitativa mätningsmetoder har tillämpats i syfte att kunna utföra en nulägesanalys av situationen i produktionen, vilket är väsentligt vid utförande av förbättringar. Intervjuer har utförts för att identifiera brister i kommunikationen mellan operatorer och deras chefer. Slutsatsen av detta arbete blir att använda manualen för implementering av kvalitetskontroller och styra tillverkningsprocessen.
4

“Implementation of quality control in order to assure the quality of a manufacturing process within a production line” / “Implementering av kvalitetskontroll för att kvalitetssäkra tillverkningsprocessen i en produktionslinje”

Skoog, Johanna, Jusufagic, Amra January 2007 (has links)
<p>This project is performed at Volvo Construction Equipments in Braås, which is one of the world leading producers of equipment for construction places. The quality aspect is an important factor when increasing the production in a manufacturing company and the role of quality should be highlighted in order to produce more error-free products, using cost-effective methods and tools. This case study emphasises ways of implementing quality control in order to quality assure the manufacturing process with focus on the manual and automatic handling. By standardising and analysing the collected and measured data in the manufacturing process the quality will be assured by implementation of quality control. The result of the study is to use a developed manual for implementation of quality control, which will increase the quality level. To reach the goal of this study qualitative and quantitative measurement has been used for identifying the present situation and which factors that is important when making improvements. Then interviews have been performed to define gaps in the communication between managers and operators. The conclusion is to use a manual for how to implement quality control and controlling a process.</p> / <p>Denna studie är utförd på Volvo Construction Equipments i Braås, vilka är världsledande inom tillverkning av anläggningsmaskiner för byggarbetsplatser. Kvalitén är en viktig faktor vid ökning av produktionskapacitet i en tillverkningsprocess då den påverkar mängden felfria produkter. I denna studie läggs vikten vid implementering av kvalitetskontroll för att kvalitetssäkra tillverkningsprocessen i en produktionslinje med fokus på den manuella och automatiska hanteringen inom tillverkningsprocessen. Genom standardisering och analysering av de samlade och mätta data från tillverkningsprocessen kommer kvalitén att säkras genom särskilt utformade kvalitetskontroller. Detta resulterar i en utvecklad manual för implementering av kvalitetskontroller vilket kommer att medföra att kvalitén förbättras. Kvalitativa och kvantitativa mätningsmetoder har tillämpats i syfte att kunna utföra en nulägesanalys av situationen i produktionen, vilket är väsentligt vid utförande av förbättringar. Intervjuer har utförts för att identifiera brister i kommunikationen mellan operatorer och deras chefer. Slutsatsen av detta arbete blir att använda manualen för implementering av kvalitetskontroller och styra tillverkningsprocessen.</p>

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