The paper presents an analysis of selected design solutions for spur gears with reduced weight, in which the results obtained are compared to a solid gear without modifications. The reduction of the weight of the gears is of particular importance, among others in the automotive and aviation industries, where it reduces energy consumption, and thus CO2 emissions. It is also important to remember to maintain the required strength parameters when reducing the mass of the gear. This article focuses on the analysis of deformation and stress due to a given load on the considered weight-reduced gears. The values of the obtained static analysis results of the reduced-weight gears were also compared to the base gear.

The article presents the place of 3D printing in the manufacturing and operational process. It analyzes selected incremental technologies in the product life cycle. It describes selected processes for testing the properties of materials used in 3D pr...

The geometrical accuracy of injection-molded gears made of PA6, PA66 and PPA filled with glass fiber (30, 35 and 50%) were investigated. Using the AMI software, the injection mold cavity and the injection point distribution were simulated and the orientation of the glass fibers in the product was determined. The low accuracy class of injection-molded gears may indicate the need to optimize the injection process, which will be the subject of further research.

The first part of the research presented in this article, related to the geometric accuracy of models made using four specific additive manufacturing methods: Material Extrusion Modeling (MEM), PolyJet Modeling (PJM), Digital Light Processing (DLP), and Direct Metal Laser Sintering (DMLS), focuses on the accuracy of rectangular and cylindrical models. For this purpose, research models were developed containing cylindrical and rectangular solids and holes in the dimensional range 0.1-10 mm. Based on the results, it was found that DMLS models are characterized by the highest geometric accuracy.

This article presents a strength analysis of selected polymer materials (ABS (acrylonitrile butadiene styrene), PLA (polylactic acid), HABS (hard acrylonitrile butadiene styrene), HIPS (high-impact polystyrene), PC/ABS (acrylonitrile butadiene styrene with polycarbonate), and S&S (strong and...

Broadly, understood additive manufacturing techniques expand the spectrum of production of machine parts that are used in various types of devices. However, the requirements to ensure dimensional and shape accuracy require the determination of approp...