The invention discloses a
toughening FRP spiral connecting piece and a manufacturing method of the
toughening FRP spiral connecting piece. The
toughening FRP spiral connecting piece comprises a bolt, a nut and a
gasket. The bolt comprises a bolt head and a
threaded rod, wherein the bolt head and the
threaded rod are connected into a whole, and external threads are arranged on the
threaded rod. Internal threads are arranged on the nut. The external threads and the internal threads are matched with each other. The threaded rod is sleeved with the
gasket. The nut is tightly screwed on the threaded rod. According to the method, an
epoxy resin substrate serves as a main body, flexibilizers are then added, and
resin adhesive materials, short
fiber and
fiber cloth are formed according to vacuum molding. Mechanical and semi-automatic molding forming is adopted for the FRP connecting piece, and therefore large-scale production can be achieved; the FRP connecting piece is used for connection of FRP components, and the overall
corrosion-free function, the non-magnetic function, the electric insulation function, the vortex-loss-free function, the vortex-interference-free function and other functions are given into full play; when the FRP connecting piece is used, the large FRP component can be resolved into multiple small FRP parts, and the energy saving effect and the emission reduction effect are achieved.