Annotation: The article describes the problems of manufacturing large-size nozzle blocks by classical for Ukrainian space industry method of high-temperature brazing. The Yuzhnoye SDO-selected way of solving this problem and the first strides on the way to organization of new production using innovative technologies of laser welding and surfacing are presented. The step-by-step sequence and procedure of research work to develop and test a new technology of cooled nozzle block manufacturing are described. Four phases are identified, out of which the first two phases have already been successfully performed. The laser welding and surfacing technology will allow avoiding the use of costly and unique equipment and will allow reducing and optimizing the technological manufacturing cycle rejecting the long –term and energy-consuming technological operations. The scientific-and-technological works performed showed the principle feasibility of making connection between the external jacket and internal wall of a nozzle block using laser welding. The test samples manufactured confirmed the high strength characteristics, which had been preliminary obtained by the theoretical calculation methods. The sections obtained by surfacing demonstrate good metallurgical connection between the layers. On the test samples, the technique was tried-out allowing repairing defect areas in a welded seam obtained by laser welding method. This is especially important from the technological and economic viewpoints, as the technology of high-temperature brazing applied currently does not allow making guaranteed repair of brazed joints.

Annotation: The process of introducing new technologies at Yuzhnoye SDO requires major changes of aerospace products designing methods and project management methods, which allows realizing new opportunities, reducing manufacturing expenses with simultaneous increase of products quality. New software products are presented directed at solving the problems identified when using additive technologies at Yuzhnoye SDO. Such as Autodesk Netfabb, AM Process Simulation, ESI Additive Manufacturing and others that allow optimizing the model for additive technologies through the change of material structure, taking into account and compensation of heat setting during printing propose the tools for creating bionic design. Creation of new technologies of producing cooled nozzle block of LRE chamber without soldering became possible due to integrated approach, with optimal combination of already existing technical solutions with principally new ones, such as laser welding and surfacing. The cost analysis is considered as the most effective optimization method at selection of optimal design and manufacturing technology for its possible implementation at the company. The personnel problem, the issues of quality improvement and labor productivity increase in all production phases are foundational to reduce manufacturing cost.