Design of Machines and Structures

Modeling noncircular gears with CogAl software

András Bendefy, Attila Piros — Tue, 20 Oct 2026 00:00:00 +0200

Nonlinear racks, noncircular gears and chain rings are special and rare machine parts. The rarity can be explained by the complicated evaluation process of these gears. This introduced project, a numerical method were determined and applied in a computer program, which makes this process easier and faster. The main concepts of the numerical method and the functionality of our software will be shortly presented through some special examples.

Change of tooth root stress calculation model for non-symmetric tooth shape

Zsuzsa Drágár, László Kamondi — Tue, 20 Oct 2026 00:00:00 +0200

In gear design the calculation of the strength has great important that national or international standards ordain. Models in these directives apply gears of symmetric tooth shape. In case of gears rotating in one direction asymmetric tooth shape arises. Model should be modified for calculations of non symmetric tooth shape.

Corckscrew design

Zoltán Tamás Kovács, Ágnes Takács — Tue, 20 Oct 2026 00:00:00 +0200

Design is a (kind of) creative activity, the main objective of which is to define the characteristics of the designed machines or products. These characteristics are not just the outside features of the machines but also the fundamental structural and functional parts of them. The quality of the design is determined by several factors like the harmony between the cultural, the technical, the economic and most of all the functional aspects of the design and the flow between the aforementioned categories. The goal of the design is to create a colourful quality of the objects in their whole lifecycle. So the designer is not only responsible for defining the product concept, but also has to pay attention to the mechanical computations, regulations of the law, producability etc.

Virtual reconstruction of an ancient piece

Melinda Majoros, Eszter Varga, Attila Piros — Tue, 20 Oct 2026 00:00:00 +0200

Our research topic is to present how to remake the original geometry and the visualization of a 16th century piece in CAD system. This article gives an overview, which introduce a complex method we used to create solid body from a scanned point cloud, on which different virtual simulations can be carried out. For the solution of the task we have developed a method for creating a surface texture, which is capable of displaying photo-realistic virtual models as well. The process itself innovative and novel, which can be used in varied places and it can also facilitate the manual restoration procedure.