International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The design of complex armament details is a challenging process that requires great amount of time and data collected from ballistic calculation of the artillery tube. The developed software product that calculates the recoil brake’s piston rod replaces the large amount of computational work required, reduces the probability of calculation errors and enables the designer to focus his creative thinking into the combination of different materials and construction dimensions. The ability to export the calculated piston rod profile afterwards allows for easy transfer of the information required into a 3D virtual reality and the use of 3D modeling for the construction of the piston rod and the recoil braking device.

In the report is explored employment of armament design information technologies for education purposes and usage of automation, calculation, design and engineering methods for analysis and testing of armament models in virtual environment.

Virtual prototypes or virtual 3D models of complex armament parts reduce costs and production time with minimal risk of hidden flaws, testing and analyzing the construction before creating real physical prototypes or optimizing parameters in parallel with the physical prototypes. The report presents the possibility of rapid prototyping through the virtual 3D model of the SPG-9 breech and using additive manufacturing to obtain a functioning physical prototype.

A new methodology for taking into account of the cargo pendulum angle change at minimum operating radius of the gantry cranes level luffing jib systems is proposed. The impact of this change in electric motor power calculating has been studied. An optimization mathematical model that takes into account this change and the impact of node displacements on the design of the gantry cranes level luffing jib systems is built. Parameters, optimization criteria and their boundaries are determined. Optimization of the construction taking into account these factors was made using the Pareto optimization procedure and the results were compared with previous studies.

A new construction of the gantry cranes level luffing jib system has been proposed. Its important operating characteristics has been studied. An optimization mathematical model of these structure is built. The parameters, optimization criteria and their limitations are defined. The optimization of construction is done using the Pareto optimization procedure in MATLAB. All parts and assembled units of the gantry cranes level luffing jib system have undergone optimization in practice. The results of the optimization study of the new design are compared with those of the traditional structure.

3D printing also called Layer based technology, Freeform fabrication, Additive manufacturing or Rapid Prototyping technologies has undergone significant development over the last decades. The growth is related to the expansion of the range of materials used, application areas, and range of possible sizes from nanometer to tens of meters as well as increasing machine accessibility. There is a growing consensus that 3D printing technologies will be at the heart of the next major technological revolutions. At present there are some technological specifics and associated difficulties in 3D printing one of which is the accuracy of the manufactured product. Research in this area would allow modelling of 3D printing processes.

The article describes the possible types and sources of inaccuracies in 3D printing processes. The various types of test pieces used in practice are examined to quantify the errors in shape and sizes after building. Test pieces with predefined discrete points and methodology are provided to calculate inaccuracies. The results are presented in the terminology of “linear” and “shear” deformations. This gives opportunity to determine the variations in the shape and dimensions of the parts built by 3D printing. On the basis of the discreet results obtained, the possibility of 3D printing process modelling is discussed and presented.