1. A manual welding method for determining a position of a welding torch comprising the steps of: emitting a signal via a transmitter, wherein the signal is received by at least one sensor arranged in or associated with the welding torch and forms measurement data; sending the measurement data to an evaluation unit; performing a first real-time welding process via the welding torch; determining via the evaluation unit three-dimensional position values for the position of the welding torch in a three-dimensional space during the first welding process performed by the welding torch; storing the three-dimensional position values and welding parameters for the first welding process in a memory; performing via the welding torch a subsequent real-time welding process of a same kind as the first real-time welding process; emitting a subsequent signal via the transmitter, wherein the subsequent signal is received by the at least one sensor forming subsequent measurement data when the welding torch is located at a subsequent position in the three-dimensional space during the subsequent real-time welding process; sending the subsequent measurement data to the evaluation unit; determining via the evaluation unit subsequent three-dimensional position values for the subsequent position; comparing via the evaluation unit the subsequent three-dimensional position values to the three-dimensional position values stored in the memory; using both the three-dimensional position values and the welding parameters stored in the memory as reference values for the subsequent welding process; and automatically adjusting welding parameters of the subsequent welding process on a basis of the three-dimensional position values stored in the memory.