A kind of composite shaft and its preparation method and application

Abstract

The invention discloses a preparation method of a composite material shaft. The method comprises the following steps: (1) dipping aramid fiber woven cloth or carbon fiber cloth in thermosetting resinto obtain a pre-dipped material; (2) winding the pre-dipped material on an expanding shaft; and (3) enabling a cylindrical cavity and the expanding shaft, on which the pre-dipped material is wound, tobe assembled, rotating the rotating arm of the expanding shaft to send the material into a hot-pressing tank to mold, opening the tank finally, shrinking the expanding shaft, demolding and completingthe preparation of the composite material shaft. The composite material shaft is prepared through adopting a vacuum inner expansion molding mode, bubbles in a shaft body can be quickly and effectively eliminated in a vacuum state, and molding defects are reduced; inner expanding extrusion can guarantee that woven cloth layers are uniformly distributed, and the defect that resin and fiber are notuniformly distributed cannot appear; compared with existing winding molding, the composite material shaft can further bear relatively great tension-compression stress when transmitting a large torquewhile a traditional winding molding transmission shaft cannot bear great tension stress.

Description

technical field

[0001] The invention belongs to the technical field of composite material shaft preparation, and in particular relates to an internal expansion molding composite material shaft and its preparation method and application. Background technique

[0002] Transmission shafts in aircraft, ships, automobiles and other fields are mostly made of metal materials, but there are defects such as heavy weight, inconvenient disassembly, poor corrosion resistance, and poor fatigue performance. Today's industry is always looking for corrosion-resistant, high-strength, lightweight alternative materials, and new high-performance resin-based composite materials can meet this demand. Resin composite transmission shafts have the advantages of high specific strength, high specific stiffness, low density, good fatigue resistance and vibration damping performance, and are widely used in the transmission field.

[0003] At present, most domestic composite transmission shafts are form...

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