Syftet med denna studie är att ta reda på om trä- och metallslöjden, dvs den del av slöjden som arbetar med hårda material kan bli sammanslagen med ämnet teknik. Bakgrunden till det är att jag vill undersöka om hur slöjdens framtid skulle kunna se ut och om man skulle behöva förändra ämnet för att låta det passa in mer i framtidens teknikutveckling. Samt om det kanske endast räcker med att ha valfria teknologiska inslag så som läroplanen redan idag tillåter. Studien har gjorts med nio semistrukturerade frågor från fyra informanter. I diskussionsdelen framgår att tekniken mycket väl kan sammanfogas med ämnet trä- och metallslöjd men med komplikationen att det kan vara svårt att få tag på lärare i ett nytt ämne som liknar Finlands motsvarighet till trä- och metallslöjd som heter teknisk slöjd. Det kommer att behövas vara en långsam övergångsprocess för att hinna få utbildade lärare som kan hantera både ämnet teknik och trä- och metallslöjd. Kanske är en mer teknologiinriktad slöjd en väg att gå har jag kommit fram till i min undersökning. En annan aspekt med denna undersökning är att jag vill ta reda på om skolämnet trä- och metallslöjdens status kan förändras, dvs. hur kan man höja det och på vilka sätt är det möjligt. Jag har funnit att slöjdämnets status varierar på olika platser och för olika människor beroende på vilken bakgrund de själv har.

<p>This thesis work is made by Torbjörn Johansson on Karlstad University for Uddeholms AB. The assignment in this thesis work was to investigate tough cutting in three different tool steels: Vanadis 4 Extra, Vancron 40 and Sverker 21. The research was to compare the wear of the tool after cutting in each one of the tool steel alloys. The research was also made to see if the tool cutting in Vancron 40 has a better wear than the tool cutting in Vanadis 4 Extra and also compare the results with Sverker 21. All three of these alloys are a part of Uddeholms AB:s range of products, and is used in applications like forming tools and knife tools.</p><p> </p><p>Vancron 40 is a powder steel with a very good combination of mechanical properties like ductility, adhesive strength and hardness. But it is difficult to cut, mill and manufacture Vancron 40, and it also has a high material cost. If it can be showed that Vancron 40 has a better ability when it comes to cutting compared with Vanadis 4 Extra it would lead to a good sales point because more savings for the customers can be made regarding their tools.</p><p> </p><p>The research is made in a “Doosan VMD 600” 5-axis milling machine, the tools that have been used are from Sandvik Coromant and are a ball mill and a bull mill. Both mills have a diameter of 4 mm and they are both made of solid carbide.</p><p> </p><p>The result showed that Vancron 40 has a minor wear of tool compared to Vanadis 4 Extra and in most cases also Sverker 21.</p><p> </p><p>A cost example diagram was made where time against tooling-cost are presented. When the tool has cut (effective time) in about 950 hours the savings are about 800 000 SEK.</p><p> </p><p>Also a research about surface finish was made but the results were pretty confusing and no pattern was found. Therefore no conclusions were made regarding surface finish.</p>

This thesis work is made by Torbjörn Johansson on Karlstad University for Uddeholms AB. The assignment in this thesis work was to investigate tough cutting in three different tool steels: Vanadis 4 Extra, Vancron 40 and Sverker 21. The research was to compare the wear of the tool after cutting in each one of the tool steel alloys. The research was also made to see if the tool cutting in Vancron 40 has a better wear than the tool cutting in Vanadis 4 Extra and also compare the results with Sverker 21. All three of these alloys are a part of Uddeholms AB:s range of products, and is used in applications like forming tools and knife tools.   Vancron 40 is a powder steel with a very good combination of mechanical properties like ductility, adhesive strength and hardness. But it is difficult to cut, mill and manufacture Vancron 40, and it also has a high material cost. If it can be showed that Vancron 40 has a better ability when it comes to cutting compared with Vanadis 4 Extra it would lead to a good sales point because more savings for the customers can be made regarding their tools.   The research is made in a “Doosan VMD 600” 5-axis milling machine, the tools that have been used are from Sandvik Coromant and are a ball mill and a bull mill. Both mills have a diameter of 4 mm and they are both made of solid carbide.   The result showed that Vancron 40 has a minor wear of tool compared to Vanadis 4 Extra and in most cases also Sverker 21.   A cost example diagram was made where time against tooling-cost are presented. When the tool has cut (effective time) in about 950 hours the savings are about 800 000 SEK.   Also a research about surface finish was made but the results were pretty confusing and no pattern was found. Therefore no conclusions were made regarding surface finish.