The article describes the problems, mathematical models and algorithms for control of the automatic welding technologic processes in the robotic complexes. The problem of a rational control of the process is solved by the criterion used for minimization of the damage caused to the quality by breakdowns. Since a solution by the methods of variations calculus is problematic, the problem of the criterion minimization boils down to development and verification of implementation of a detailed complex action plan for a decrease of the damage due to breakdowns in the technological processes. The action plan was developed based on the causality between the process parameters and learning of the experience by the dispatching personnel. The plan is presented as a directed graph, in which vertices are actions of the plan, and arcs define their relationship and sequence of implementation. The conditions affecting the technological process and implementation of the plan of actions are presented in the form of a production model. For verification of the plan's implementation a logic function was developed in accordance with the graph of the action plan and conditions. By setting different values of the arguments of this function at any time, it is possible to check quickly a possibility of the plan's implementation. The article presents an algorithm for solving of the assignment task at different time intervals by an information-logical scheme. Introduction of the developed models and algorithms in the industrial enterprises using a robotic welding will reduce the damage caused by the defective products.