Lithium battery diaphragm splitting machine slitter edge winding roll core and winding device

The slitter edge winding roll core of the lithium battery diaphragm splitting machine comprises a core shaft, an even number of arc-shaped plates are evenly distributed on the outer edge of the core shaft in the circumferential direction of the core shaft, a reset spring is arranged between the two arc-shaped plates which are oppositely arranged, the two ends of the reset spring are connected with the inner walls of the two arc-shaped plates respectively, and the two ends of the reset spring are connected with the inner walls of the two arc-shaped plates respectively. The central spindle is provided with a receding hole used for receding the reset spring. One end of the mandrel is provided with a first chuck used for applying expansion force to the arc-shaped plates, when the reset spring is in an initial state, the inner walls of all the arc-shaped plates are located on the same cylindrical surface, and the outer diameter of the first chuck is larger than the diameter of the cylindrical surface. The operatio