The embodiment of the invention discloses an automatic
lap joint device and method for composite prepreg tows, and the device comprises a tow
lap joint module, an automatic lifting module, an electrical and
control system, and a moving cabinet. The tow
lap joint module comprises an upper pressing block, a lower pressing block, a spring guide column
assembly, a heating module, a
pressure sensor, a tow fixing elastic pressing block, a lap joint
brush and a connecting plate, the tow lap joint module is installed in the automatic lifting module, the automatic lifting module can be connected with the support or the movable cabinet, and the electrical and
control system is installed and fixed in the movable cabinet; during lap joint, the head end and the
tail end of the prepreg tow are sequentially laid and fixed in the groove of the tow lap joint module, and tow lap joint is automatically completed under set process parameters. By adopting the device provided by the embodiment of the invention, the high-speed and high-quality lap joint of the composite pre-impregnated tows of various specifications can be quickly completed, the lap joint consistency is good, the efficiency is high, and the quality and the performance of a composite workpiece are further improved.