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Academic literature on the topic 'Lyftverktyg'
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Dissertations / Theses on the topic "Lyftverktyg"
Jonsson, Emil. "Konstruktion av lyftverktyg : Lyftverktyg till L-stöd för enklare hantering." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-72640.
Full textQasemi, Hossein. "Lyftverktyg för gastuber." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-78591.
Full textEriksson, Anders, and Jonas Knutsson. "Konstruktion av handhållet lyftverktyg." Thesis, Linköping University, Department of Mechanical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5072.
Full textTyngdpunkten i arbetet ligger på framtagningen av ett handhållet verktyg för hantering av papphylsor vid Stora Ensos pappersbruk i Grycksbo. Framtagningen av verktyget följer er¬hållen kunskap inom konstruktionsmetodik och syftar till att förändra dagens arbetssätt och därmed minimera risken för arbetsskador vid den manuella hanteringen av hylsorna. Studier av alternativa lösningar, som skulle kunna skapa gynnsammare förutsättningar för att uppnå målet, har också genomförts. Resultatet, med rekommendationer och underlag för fortsatt arbete, som överlämnas till företaget innehåller följande:
- CAD-ritningar i form av en 3D-modell över framtaget verktyg.
- Förslag på modifiering av hylshäck för en effektivare hantering.
- Förslag på grundläggande förändringar som idag enbart tillämpas i viss utsträckning.
Friberg, Carl-Johan, and John Gustavsson. "Lyftverktyg : Konstruktion av 3D-modell/modeller för lyftverktyg avsett för cylinderhuvud och emballage." Thesis, Högskolan i Skövde, Institutionen för teknik och samhälle, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-8113.
Full textThe packaging of cylinder heads as spare parts for car engines is today done by hand in a company in Skövde that manufactures car engines. All cylinder heads are lifted by hand and placed inside cardboard boxes. The cardboard boxes are then sent to the retailer of spare parts. In order to improve the work situation from an ergonomic point of view and to minimize the risk of injury on both the cylinder heads and the employees, the company has ordered a lifting tool from the technical consulting company ÅF. The goal with this master thesis is to develop one or several models of lifting tool/tools that can lift as many different cylinder head models as possible. The lifting tool/tools are also going to be able to lift the cardboard box with the cylinder head inside. As starting point for the development of the lifting tool/tools, a literature study is made in the field of lifting tools. The literature study is divided into two parts; the first one includes general lifting tools on the market today. The second part analyses the different kind of lifting tools that the company already is using today. The literature study shows that there is a big variety in general lifting tools not only considering the external forces that is used to power the tools but also in which way the tools grips the objects. The study of the company’s existing lifting tools shows that it contains a big variety in different ways to grab both cylinder heads and engine blocks. To lift cylinder heads the company uses several kinds of principles, for example; lifting tools that grips with friction between lifting tool and the holes for the valve shafts. They also use lifting tools that grabs the cylinder heads by taking advantage of the cylinder head geometry. Basic concepts on how the cylinder head and the cardboard box can be lifted are developed by using a number of different design methods. Three basic concepts of lifting tools for lifting the cylinder head combined with two basic concepts on how the cardboard box can be lifted is presented to the company. One of the three basic concepts on how to lift the cylinder head is considered the best, based on its score in a concept score table. The best solution for how the cardboard box is to be lifted is not to lift it at all. Instead should the cardboard box be pushed away on a ball transfer table. Still, the company chooses another one of the basic concept for further development. Also the second solution on how to lift the cardboard box is chosen by the company. Due to that the cylinder heads geometries varies so much between the different models, two different lifting tools are developed. The construction of both of the tools is based on two aluminium frames, constructed by aluminium profiles. The two frames are joined together by linear motion bearings. The frames are lowered down over the cylinder head and then being pressed together by a pneumatic cylinder. This results in that the one of the two lifting tool is gripping the cylinder head with contact pressure and friction between the cylinder head and the aluminium cylinders on the lifting tool that have polyurethane vulcanised on its ends. The other lifting tool grips the cylinder head by using the cylinder heads geometry. The two lifting tools are both equipped with polyester bands with hooks mounted on its ends that fits in the premade handles on the cardboard box. This makes it possible to lift the cardboard box with a cylinder head inside of it. The result of this is two lifting tools, one that grips with pressure and friction and one that grips by mechanical locking based on the cylinder heads geometry. For the lifting tool that grips the cylinder head with pressure and friction a series of analyses is made using the Finite Elements method. The purpose with these analyses is to evaluate torque, stress and displacement of the lifting tool. From the results of these analyses in combination with some carefully considered assumptions, conclusions of the strength of mechanics for the lifting tool are made. This shows that all the included parts of the lifting tool; such as screw joints, linear motion bearings and aluminium profiles, have a factor of safety higher then 2 against plastic deformation. Based on obtained results from this thesis, advises on further development for the lifting tools are presented to ÅF.
Malis, Isak. "Lyftverktyg till ytbehandlingsborstar : Konstruktion av ett lyftverktyg för byte av ytbehandlingsborstar till plåttillverkningsindustrin." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-67736.
Full textHandling and replacement of cylindrical surface treatment brushes for rolled sheet metal is currently done by hand at the company voestalpine Precision Strip AB in Munkfors. The workis described as time consuming, non-ergonomic and with some risk of personal injuries. The surface treatment brushes that are handled are sensitive to both forces and dirt on their outer jacket area and therefore require caution when handling. To improve the ergonomic circumstances and minimize the risk of personal injury while ensuring the handling of thebrush, the company has requested a lifting tool. The goal of the project is to develop a travers emounted lifting tool that can lift the brush directly from the delivery pallet and mount in the intended machine without risking the quality of the brush or exposing personnel to risks. The tool is designed to be CE-labeled after manufacturing. To get a clear picture of today's working methodology and to define problem areas for a brush change, a preliminary study is conducted. The result of this study, together with the wishes of the company, is summarized into a requirement specification that becomes a direct starting point for continued development of the design. The concepts and ideas that are developed are evaluated and presented to the project organization. Some of the solutions are considered to have potential for further development and are kept for further development. It should be mentioned that the further development of the lifting tool until its final construction is aproduct of partly my own solutions, and partly the viewpoints, ideas and aspects from other members of the project organization. The final construction of the traverse lifting tool meets the requirements formulated in the specification and is considered safe and easy to handle and with good chances of being CEmarked. The tool can lift the brushes from the delivery pallet, rotate and mount in and out of the machine without grabbing the outer casing area or otherwise risking the brush's functionality. The tool also completely eliminates the non-ergonomic movements that arise as a result of the manual handling of the brushes that occur today. It is noted that the final lifting tool has potential for improvement, thus it ́s provided suggestions for continued work and further development of the product.
Rozic, Bozidar. "Konstruktion av lyftverktyg till pinjong." Thesis, Mälardalens högskola, Innovation och produktrealisering, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-43178.
Full textSvensson, Thea, and Sandra Sunnegårdh. "Lyftverktyg för ergonomiskt byte av lastbilsbatterier." Thesis, KTH, Maskinkonstruktion (Inst.), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168913.
Full textThe paper covers a product development project in which two students develops a tool for lifting heavy lorry batteries, for Scania’s repair shops. The problem is that the space above and on the sides of the batteries is very limited and that the batteries are so heavy that it is considered very ergonomically unfavorable to lift them manually. In order to study the ergonomic aspects, as well as other important aspects, that need to be consideredwhen developing the tool, the students have carried out a wide pre-study. This study has coveredeverything from benchmarking and observations to “safari” where the students themselves triedchanging the batteries a number of times. Numerous interviews and meetings have been held withemployees at Scania – most commonly in order to answer technical queries, but also to obtain feedbackon ideas and concepts.The students have also carried out a parallel project where a general “ergonomic checklist” for designing special tools has been developed. This has been done through deep studies of several ergonomic standards. The list has been revised multiple times after discussing it with the ergonomists at Scania andhas, together with other technical requirement, been used as a foundation for the specification ofrequirements.The ideation process has been carried out through brainstorming and continuous evaluations of theconcepts, using the specification of requirements. At some points matrices has been used to makedecisions between concepts, in order to show the requirements and how the concepts relate to them.The concept’s function and appropriateness have been evaluated through mockups, CAD-models and physical prototypes. It has been an iterative process where some concepts have been rejected when for example detailed sketches has been made. The prototype has also contributed to the discovery of some problems and restrictions.Finally, a practically functioning concept has been developed. The construction has been verified through tests and calculations. Manufacturing methods has been discussed for all components and Scania will receive a concept with full CAD-models and drawings. The product is in other words ready tobe manufactured, as soon as it has gone through minor adjustments and the CE-labeling procedure.
Österberg, Erik. "Utveckling av lyftverktyg : Förebyggande av överbelastningsskador." Thesis, Uppsala universitet, Industriell teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-448557.
Full textAndersson, Louise, and Stefan Erlandsson. "Utveckling av ett lyftverktyg för skivformade produkter." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-8943.
Full textDuring the second semester of 2013, product design engineering students Stefan Erlandsson and Louise Andersson have been involved in a project in cooperation with entrepreneur Lars Willebrand. The main objective of this project has been to develop a lifting tool for sheet materials. The lifting tool is one of four different products developed by Lars Willebrand. The line of products also includes an overhead crane, a slewing crane and a storage drawer for metal sheets, which are already fully developed and ready for production. The purpose of this lifting tool is to be used along with the storage drawer which means that is has to be optimised for lifting sheet materials from different heights. This means that the lifting tool has to be designed with regards to the users working postures. Human factors such as ergonomics have to be taken into account as well. The initial part of the project is a pre-study with focus on ergonomics and human factors. This pre-study included a study in relevant literature, contact with a manufacturing company and an analysis of the possible competitor’s lifting tools. The results from the pre-study have further been used to define the specification of requirements, which is the foundation for the concept development. The concept development has undergone a number of different phases. All of the lifting tool’s main functions were broken down and developed individually. The functions were as follows; adjustment of the suction cups, lifting from different heights and handling. The most suitable solution for each main function were chosen and assembled into one final concept. The final concept has been analysed and further developed in order to please the employer and the users of the lifting tool. Some details in the design have been changed in order to ease the manufacturing of the lifting tool. To ensure that the final concept matches the specification of requirements, strength calculations and FEM analysis have been made and anthropometrical measurements have been taken into account. The final chapters include a discussion and recommendations for further development of the lifting tool.
Blom, Jonathan, and Mikael Johansson. "Design av transportfixtur och lyftverktyg för modulvägg." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-40135.
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