This bachelor thesis aims to find a more sustainable and cost-effective solution for a rotation system used for turning walls. The work was carried out by the client Husmuttern AB, which requires a rotation system for rotating wall fixtures in the company's future construction projects in Scandinavia, as well as in Poland and Ukraine. The current fixture is powered by an electric motor, which the company considers to be a costly and less sustainable solution. Therefore, this work will present a more cost-effective and sustainable solution and address the development process for the proposed design. The research question for this thesis is: How can an existing electrically driven rotation system be replaced with a manually operated mechanical rotation system while ensuring that the design meets the internal requirements of Husmuttern AB and the external regulations from the Swedish Work Environment Authority regarding load ergonomics? The work has been done with consideration for cost-effectiveness, ergonomics, and safety. Relevant regulations from the Swedish Work Environment Authority have been reviewed in the course of this work. The work has also focused on developing a concrete proposal where the use of standard components has been prioritized to save resources and result in a cost-effective solution based on available material dimensions from different suppliers. Computer Aided Design (CAD) has been used to draw and assemble components that the rotation system's design consists in a virtual environment. CAD has been used with the help of Solidworks software to give a closer picture of what the construction might look like, as well as how the components sit and their position and direction. The work has been completed within the specified time limit and delivers what was specified in the limitations. The result is a new rotation system - a manually operated mechanical rotation system that enables ergonomic and safe work tasks. The report describes the work process, calculations, drawing documents, and a user description of the rotation system's work tasks, thus constituting the delivery of the work.

This bachelor thesis deals with the development process for a design proposal on a rotation system. The work was performed on behalf of Husmuttern AB, whom needs a rotation system to rotate wall fixtures in the company´s future modular house factories. The work has been carried out with an iterative product development methodology that both addresses internal requirements of the company and external requirements from relevant regulations. The work´s imminent problem formulation is; how to develop a rotation system while ensuring that the construction meets the internal requirements from Humuttern AB and external regulations from the Swedish work environment authority regarding load ergonomics and machines. The focus in this work has, besides taking into account ergonomics and security, been to produce a concrete proposal that is to some extent close to manufacturing. This implies that standard components and standard dimensions of materials are used. As a validation of the developed design, FEM analyzes (Finite element method) were applied in SolidWorks where safety factors, stress distributions and deformations could be investigated for the stresses that might arise. The work could be completed within the deadline and delivered what the delimitations specified. The result is a rotation system that will allow ergonomic and safe operation. The work is delivered in the form of this report, which includes the described work process, calculations, drawing documentation, risk analysis and user description of the rotation system's workflow. / Detta examensarbete behandlar utvecklingsprocessen för ett konstruktionsförslag på ett rotationssystem. Arbetet utfördespå uppdrag av Husmuttern ABsom behöver ett rotationssystem tillatt rotera väggfixturer i företagets framtida modulhusfabriker. Det genomförda arbetet har utförts med en iterativ produktutvecklingsmetodik där både interna krav från företagets sida samt externa krav från relevanta föreskrifter behandlats.Arbetetsöverhängande problemformulering är;hur utvecklar man ett rotationssystem och samtidigt säkerhetsställer konstruktionens uppfyllelse av interna krav från Husmuttern AB och externa bestämmelser från Arbetsmiljöverket gällande belastningsergonomi samt maskiner.Arbetet är utfört medavseende på framförallt ergonomi samt säkerhet. Till detta har relevanta föreskrifter inom området setts över. Föreskrifterna har under utvecklingsarbetet format det slutgiltiga resultatet.En riskanalys genomfördesför att behandla eventuella risker med det framtagna förslaget och en bedömning genomfördes inom området belastningsergonomi på rotationssystemets arbetsmoment.En diskussion gällande säkerhet och rekommendationer har även genomförts.Fokus i detta arbete har förutom att ta hänsyn till ergonomi samt säkerhet varit att ta fram ett konkret förslag, d.v.s. något som är nära tillverkningsklart.Detta innebär attstandardkomponenteranvänts samt att konstruktionen baseras på tillgängliga materialdimensionerfrån vald producent.Som validering av den framtagna konstruktionen användesFEM-analyser(Finita elementmetoden)i Solidworks där säkerhetsfaktorer, spänningsfördelningar samt deformationer kunde undersökas för de belastningar som kan tänkas uppstå.Arbetet kunde slutföras inom utsatt tid och levererar det som avgränsningarna specificerar. Resultatet är ett rotationssystem som ska kunna tillåta ergonomiska samt säkra arbetsmoment. Arbetet levereras i form av denna rapport som bl.a innehåller den beskrivna arbetsprocessen, beräkningar, ritningsunderlag, riskanalys samt användarbeskrivning av rotationssystemets arbetsmoment.