Voronko I. Development of the pneumopulse mandrelling technology of the holes in aircraft structures made of titanium alloys using robotic workcells

The subject of research is the technology and air-impact tool for holes mandreling in aviation structures made of titanium alloys in robotic complexes; the objective of research is to develop the technology and modification of the air-impact tool for holes mandreling in aviation structures made of titanium alloys when used in RTC conditions; research methods – numerical methods for solving problems for processes of air-impact holes mandreling in aviation structures of titanium alloys; technological recommendations for air-impact holes mandreling in aviation structures made of titanium alloys were developed on the basis of experimental studies; the deformed state of the mandrelled samples was investigated by methods of macro- and microstructural metallography and electron microscopy; the results of research – technological recommendations for parameters selection of the pulse mandrelling process of the holes in aircraft structures made of titanium alloys are provided; pneumopulse mandrelling device for the use as a part of the robotic workcell is improved by performing constructive modification; novelty – for the first time, technological process of the pulse mandrelling of the holes in aircraft structures made of titanium alloys are developed, having provided increased durability by more than 15%; the method of determining rational parameters of pulse mandrelling of holes with titanium alloys in the CAD / CAE was further developed, namely, the properties of the working tool mandrel are given as a power function instead of an absolutely rigid body, which made it possible to reduce the error between numerical simulation and a field experiment from 15% to 10%; improved methodology for the development of technological processes for pulse mandrelling of holes in aircraft structures allowed the use of pneumopulse devices as a part of the robotic workcell; the degree of implementation – Antonov Company, National Aerospace University "Kharkiv Aviation Institute"; area of implementation – aviation industry.