Straightening apparatus for metal products and method to replace at least one straightening roll of said apparatus

An apparatus for straightening metal products comprising:

• a rotation shaft on which a straightening roll is installed in a selectively removable manner;
• a first structure provided with at least a first support member configured to hold and support a first end of the rotation shaft;
• a second structure provided with at least a second support member configured to selectively support and hold a second end, opposite the first end, of the rotation shaft,
• wherein said second support member comprises a tubular support bushing inserted axially at least on the second end of the rotation shaft, in that said tubular support bushing is provided with a support end installed protruding with respect to the second structure and toward the straightening roll, and in that the straightening roll is provided, at one end of an axial cavity thereof, with a circumferential hollow in which said support end of said tubular support bushing is positioned;
• a movement member configured to move the second structure toward/away from the first structure and to allow the installation or removal of the straightening roll from the rotation shaft, wherein said second structure is provided with gripping means, able to be selectively activated to take and hold the straightening roll on the second structure at least during the movement of the second structure.