Reshaping method and device for carrying out the method

A method of reshaping a workpiece, in which a reshaping force is exerted on the workpiece by a reshaping tool and the workpiece is heated during or before reshaping of the workpiece, wherein heating of the workpiece is effected by at least partial absorption of an ultrasonic vibration in the workpiece wherein before the reshaping force is applied to the workpiece at least a first portion of the workpiece is brought to a temperature which differs from the temperature of a second portion of the workpiece, that comes into contact with the reshaping tool.

A device for reshaping a workpiece comprising a reshaping tool in the form of a sonotrode and which is so designed that it can be brought into contact with a workpiece to be reshaped and a reshaping force can be applied to the workpiece, wherein the device has a transducer for producing an ultrasonic vibration wherein there is provided a device for heating and/or cooling a first portion of the workpiece to be reshaped and for producing a temperature gradient between the first portion and a second portion of the workpiece that comes into contact with the reshaping tool.