Apparatus (50; 50A) for a welding control , comprising a determination module for determining at least one welding tool parameter (A B , M_B) which depends on a driving of the welding tool relative to the at least one component during a welding procedure using the welding tool , the welding tool being a resistance welding tool designed as an electrode holder with two electrodes , and a force value generation module for generating, from a welding tool parameter (A B , M_B) determined by the determination module , an actual force (F S (t); F S_ACT ) that arises during the welding procedure using the welding tool , wherein the at least one welding tool parameter is a welding tool arm bend (A B ) which is a function of the actual position (L ACT ) of the at least one electrode of the welding tool , and/or wherein the at least one welding tool parameter is an acceleration torque (M_B) of the at least one electrode of the welding tool and the acceleration torque (M_B) is a function of the actual rotational speed (n_ ACT ) of the drive device for driving the at least one electrode of the welding tool , wherein the force value generation module is designed to generate the actual force (F S (t) ; F S_ACT ) using a model of the welding tool , wherein the model models the welding tool as a spring and has at least one spring parameter (k_E, Tt) defining the spring , and wherein the force value generation module is designed, for the purpose of generating the actual force (F S (t) ; F S_ACT ), to give due consideration to a change in the force (F S (t) ; F S_ACT ) which arises during a welding procedure with the welding tool as a result of errors within the determination of the time-varying actual position (L ACT ) of at least one of the electrodes during the welding procedure. a determination module for determining at least one welding tool parameter (A B , M_B) which depends on a driving of the welding tool relative to the at least one component during a welding procedure using the welding tool , the welding tool being a resistance welding tool designed as an electrode holder with two electrodes , and a force value generation module for generating, from a welding tool parameter (A B , M_B) determined by the determination module , an actual force (F S (t); F S_ACT ) that arises during the welding procedure using the welding tool , wherein the at least one welding tool parameter is a welding tool arm bend (A B ) which is a function of the actual position (L ACT ) of the at least one electrode of the welding tool , and/or wherein the at least one welding tool parameter is an acceleration torque (M_B) of the at least one electrode of the welding tool and the acceleration torque (M_B) is a function of the actual rotational speed (n_ ACT ) of the drive device for driving the at least one electrode of the welding tool , wherein the force value generation module is designed to generate the actual force (F S (t) ; F S_ACT ) using a model of the welding tool , wherein the model models the welding tool as a spring and has at least one spring parameter (k_E, Tt) defining the spring , and wherein the force value generation module is designed, for the purpose of generating the actual force (F S (t) ; F S_ACT ), to give due consideration to a change in the force (F S (t) ; F S_ACT ) which arises during a welding procedure with the welding tool as a result of errors within the determination of the time-varying actual position (L ACT ) of at least one of the electrodes during the welding procedure. <EOS>