Clamp and method for cutting and welding radiator

The invention discloses a clamp and a method for cutting and welding a radiator. The clamp comprises a base, and support frames and a speed reducer arranged on the base; a rotatable bottom plate is arranged between the left support frame and the right support frame; front and rear bracket plates are respectively arranged at the front and rear ends of the bottom plate; the front and rear bracket plates are provided with positioning holes; a supporting assembly is arranged at the right end of the bottom plate; a positioning block is arranged on the supporting assembly; a fixing component for fixing a hot air flowing passage port of the radiator is arranged on the positioning block; a rotating shaft of the speed reducer passes through the right support frame and then is fixedly connected with the bottom plate; and a crank handle is arranged on the speed reducer. By using the clamp and the cutting and welding method in production, the assembly position of the radiator on the support frames of the clamp is consist