Single-curved-surface sandwich composite board, and mold and forming process thereof

The invention relates to a single-curved-surface sandwich composite board, and a mold and a forming process thereof. The single-curved-surface sandwich composite board comprises an inner panel, a coreboard and an outer panel which are bonded in sequence; the composite plate is bent towards the inner panel; a section from the point b to the point c of the composite board is a plane section; a section from a point a to a point b and a section from a point b to a point c of the composite board are two symmetrical curved surface sections, and an arc surface section A and an arc surface section Bwith different radiuses are formed on each curved surface section at intervals; first grooves are formed in the surface of a part, corresponding to the arc surface section A, of the core plate, secondgrooves are formed in the surface of a part, corresponding to the arc surface section B, of the core plate, and the first grooves and the second grooves are arranged in the direction perpendicular tothe bending direction of th