lntegrated Optical Fiber Sensors in Additive Manufactured Metal Components for Smart Manufacturing Applications

Konferenz: Smart Systems Integration - 13th International Conference & Exhibition on Integration Issues of Miniaturized Systems
10.04.2019 - 11.04.2019 in Barcelona, Spain

Tagungsband: SmartSystems Integration

Seiten: 8Sprache: EnglischTyp: PDF

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Claesson, Asa (RISE Research Institutes of Sweden, Fibervägen 2, 824 50 Hudiksvall, Sweden)
Lyckfeldt, Ola; Ottosson, Peter; Ohlsson, David; Brinkfeldt, Klas; Hosseini, Seyed (RISE Research Institutes of Sweden, Argongatan 30, 431 53, Mölndal, Sweden)
Lindqvist, Jonas; Kardeby, Victor (RISE Research Institutes of Sweden, Käppuddsgatan 1, 824 30 Hudiksvall, Sweden)
Lejon, Erik; Ulfberg, Petter (Gestamp HardTech AB, Ektjärnsvägen 5, 973 45 Lulea, Sweden)
Rendall, Helen; Hedin, Gunnar (Proximion AB, Skalholtsgatan 10, 164 40 Kista, Sweden)
Kvarned, Anders; Karamchedu, Seshendra (Uddeholms AB, 638 85 Hagfors, Sweden)

This work combines fiber optic sensors with additive manufacturing to enable integration of temperature and strain sensors in metal components. In this paper, we present a fiber optic sensor network integrated in press hardening tools to monitor the contact between the tool and the metal sheet during forming operation. The tools are manufactured through metal powder bed fusion using laser melting processes (PBF-SLM), after which the tools are prepared for sensor integration. A demonstrator press hardening tool with integrated fiber optic sensors was heated using an electric heat foil and the sensor measurements was compared to a thermal simulation model. The sensor technology is based on Fiber Bragg Gratings (FBGs), integrated at several positions along the optical fiber. FBGs are in-fiber sensors that are multiplexed. lt is possible to place hundreds of FBG sensors along one single fiber, thus allowing for quasidistributed sensing of temperature or strain. The optical fiber itself can be less than 100 µm in diameter, allowing for sensing at several points in a minimally invasive way, when integrated in a tool or component.