Development of design and manufacturing technology of orthopedic insoles in CAD-CAE-CAM systems

The paper proposes a method of designing individual orthopedic insoles, selected rational design and material of insoles. Designed in OrthoModel Model insoles in solid format, which was exported to the STL file format. Then, using the FreeCAD program, the STL format was exported to STEP, so that the resulting model was more adapted for further application and analysis. In the ANSYS environment, a finite element model of deformation of insoles was developed and the behavior of the insole arch material under different loads and combinations of EVA materials of different hardness was studied. Stresses and deformations of the insole arch during operation are obtained depending on the combination of the material and the geometric parameters of the foot, which are confirmed by the results of experimental studies. The calculated values of deformation of insoles are taken into account in the subsequent programming of processing insoles on CNC machines. Having a 3D model of the insole, it can be made not only on the CNC machine, but also printed on a 3D printer. The cost of production of individual orthopedic insoles is calculated, which showed that the proposed technology is quite competitive.