KMT High Precision Grinding English 2012 - KMT Precision ...

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”What is driving development is the competition between manufacturers, the new emissions requirements being specified and customers’ desire and also authorities’ demands for reduced emissions,” says Hans- Erik Ångström. 14 | High Precision Grinding www.kmtgrinding.com Photos: Simon Johansson
Researcher Hans-Erik Ångström on KMT: “It is wonderful that Sweden has a company that can do such precision work” As emission requirements become more stringent, more stringent demands are also made of the parts that control fuel injection in diesel engines; that is to say, products manufactured by KMT’s Nomyline machines. “It is wonderful that Sweden has a company that can do such precision work,” says Hans-Erik Ångström, Professor of Internal Combustion Engine Technology at the Royal Institute of Technology in Stockholm. Machines which grind parts with tolerances measured in thousandths of a millimetre are manufactured at the KMT plant in Bromma. The amount of fuel injected in a diesel engine has to be exact in terms of both quantity and structure. Injector nozzles control this fuel volume, and KMT’s UVA Nomyline machines are used to manufacture them. The major challenge faced by the automotive industry nowadays involves reducing fuel consumption in order to reduce emissions of carbon dioxide, for example. “Nowadays, system pressures are being increased in order to reduce emissions. But at the same time, this increases the demands on our products, and we are working hard to keep up with developments to be able to offer our automotive customers the things they demand,” says Urban Myrefors, site manager at the KMT plant in Bromma. 0.3 micrometres in diameter Pressures can be increased without sacrificing strength by reducing the diameter of the holes in component parts. This makes even more stringent demands of the grinding machine in that the holes are slimmer. The increase in pressure also means that the shape tolerances of all the sealing surfaces are tighter so as to reduce leakage. According to Urban Myrefors, Hans-Erik Ångström, together with Royal Institute of Technology students Hans-Christian Vinners and Bengt Aronsson. there is currently extreme expansion in the field and new systems are turning up all the time. “It is becoming harder and harder to grind these components. For instance, we are down to around 0.3 micrometres in diameter, but our machines can handle this because of the technology in our designs, including hydrostatics and linear motors,” says Urban Myrefors. Enormous stresses Researcher Hans-Erik Ångström at the Royal Institute of Technology, who Urban Myrefors, plant manager at KMT Bromma. used to work for Cummins in the USA and as head of design at Scania, says that there are no signs to indicate that work on increasing injection pressure in diesel engines is diminishing. “There are enormous stresses on the systems. And the actual pump that generates the pressure cannot be too big. What is driving development is the competition between manufacturers, the new emissions requirements being specified and customers’ desire and also authorities’ demands for reduced emissions.” >>> www.kmtgrinding.com High Precision Grinding | 15
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Page 3 and 4: Dear reader, Here at KMT Precision
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KMT High Precision Grinding English 2012 - KMT Precision ...

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