High-rotational speed cup-shaped grinding wheel

A high-rotational speed cup-shaped grinding wheel, comprising an annular base, a plurality of blades and a flow splitting structure;

• wherein the blades are arranged at an interval in a circumferential direction and are fixed on a side of the base to form a blade ring, a side of the blade ring away from the base is an annular working surface, and two adjacent blades are spaced apart to form a water passage channel for delivering a cooling water to the working surface;
• the flow splitting structure is fixed on the blade ring and divides the cooling water into two branches, wherein a first branch delivers the cooling water to an outer area of the working surface through an interior of the water passage channel under a centrifugal force due to a rotation of the base, and a second branch delivers the cooling water to an inner area of the working surface through an exterior of the water passage channel under a centrifugal force due to the rotation of the base, and delivers the cooling water from the inner area of the working surface to an outer side area thereof upon being blocked by a machined workpiece.