The aim of the present work is to develop a technique for the fabrication of non-axisymmetric PEEK/Carbon (APC-2) thermoplastic composite rings using laser heating or other heat sources. The method can be applicable in the production of elliptical springs for automotive suspensions. The elliptic spring, which functions in the same vertical deflection mode and packaging space as a steel coil spring, has the potential of saving weight (as much as 50 %) in a typical automotive suspension system. During the tape winding process, heat is supplied at the contact point of the roller and mandrel to consolidate the laminate. For the fabrication on non-axisymmetric thermoplastic composite rings, the contact point changes with change in the mandrel position. The movement of laser heat source with change in contact point is found to be difficult. Moreover, tape speed is found to vary for constant speed of a non-axisymmetric mandrel. With changes in tape speed, the amount of heat supply at the contact point cannot be kept constant for uniform bonding of the laminate. This paper discusses the problem concerning the manufacture of non-circular shapes and presents a solution by developing a kinematic model. For laser processing, the heat source is kept stationary while the mandrel and roller are moved such a way that the contact point remains at same horizontal plane. A generalized formula is developed to determine the rate of rotation of the mandrel for obtaining a constant tape speed for non-axisymmetric mandrel shapes.
Manufacturing of non-axisymmetric thermoplastic composite parts by tape winding technique
Herstellung nicht achsensymmetrischer thermoplastischer Verbundbauteile durch Bandwickelverfahren
Materials and Manufacturing Processes ; 10 , 1 ; 47-56
1995
10 Seiten, 8 Bilder, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
Laserstrahlerwärmung , Schichtpressstoff , verstärkter Kunststoff , Kunststofffeder , Federring , Fahrzeugdämpfung , Fahrzeugfederung , Wickelwalze , Ellipsoid , Temperaturverteilung , mathematisches Modell , Kinematik , Arbeitswalze , Aufspanndorn , Positionierungsgenauigkeit , Wärmequelle , Winkelgeschwindigkeit , carbonfaserverstärkter Kunststoff , Polyetheretherketon
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