DREPO UNIZA (University of Zilina)
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The effect of alternating stress on the change in air temperature in the flexible pneumatic element
Full text linkRubber as a material is one of the frequently used materials in mechanical engineering. This article deals with rubber, or flexible pneumatic elements, the main part of which is rubber. We determine the effect of alternating stress on the temperature change in the flexible pneumatic element under this variable load. We describe a device that serves this purpose. This device was designed and manufactured in our department. We also determine the effect of the air pressure of the flexible element on the temperature of the air and the temperature of the flexible elements. We need to find out the magnitude of these temperatures so that we can determine whether these flexible elements can work without significant negative changes in physical properties
Structural adjustment of cutting edges
No full textThe contribution is devoted to geometrical questions related to the issue of adjusting the active parts of the cutting tool. There are three modifications of the cutters: With the blade beveled inward and bevelled outward, the blades formed by the intersection of two cylinders. The necessary schemes of these solutions and the necessary mathematical relations are published
Human-Centric Design: Improving Workplaces for People in Production and Logistics Systems
No full textThis study aims to determine the position of workers in the design of production and logistics systems. This article deals mainly with the role of humans in production systems. The introduction of this article is dedicated to the development of ergonomics in production and logistics systems. Furthermore, this article deals with the literary research of the subject matter to find out the analysis of the current state of the issue of the solution in the world. The very core of the study is the position of a person from an ergonomic point of view in production and assembly systems and, in particular, methods of relaxation of employees in production sectors
Application of non-destructive inspection methods to welded joints made of plastic
Full text linkThe article describes the possibilities of non-destructive testing of welds made of plastic materials. Both surface and volume methods of non-destructive testing can be used for plastic welds. Non-destructive testing of plastics has certain limitations. The limitations are related to the physical-mechanical properties of the material, as well as the geometry of the tested parts. The most common inspection of welds on plastic materials is a visual inspection, which is carried out to the extent of 100 %. For the inspection of plastic welds, it is also possible to use the penetration method and, with limitations, also ultrasonic and radiographic inspection
Powder metallurgy materials
No full textPowder metallurgy is used in all branches of industrial production. the main advantage of powder metallurgy is the saving of metals (materials) and energy. the main direction of development is expected mainly in the production of tool parts. the article describes the analysis of powders and the use of materials for powder metallurgy
Možnosti využitia technológie termálneho vŕtania na účely spájania tenkostenných nerovnakých materiálov v automobilovom priemysle
Full text linkThe article deals with the study of the applicability of flowdrill technology for the formation of joints between thin metallic materials based on iron and aluminium alloy. This technology is primarily used to create holes in profiles with a local increase in material thickness to accommodate a greater number of threads. If used to drill two interleaved thin-walled materials, a joint is formed as a secondary effect. The quality of the resulting bushings forming the interference fit joint was investigated. The joints were formed using a combination of uncoated deep drawn steel, galvanized HSLA steel and aluminum alloy, in different positions in the joint.
Subsequently, tensile shear testing of single joints was performed. The load carrying capacity of the joints was also tested in combination with adhesive bonding. The load capacity of the joints combined with bonding was significantly higher compared to flowdrill joints. The combination of both technologies yields an increase in the absorbed energy of the joint at failure
Materials with a high melting point used in powder metallurgy
Full text linkMetals with a high melting point are frequently used materials in technical practice. Their fundamental advantage over other metal materials is their higher melting temperature, which exceeds the melting temperature of iron. Thanks to this physical property, such metals and their alloys can be used in environments where the components are subject to high thermal stress
Application of solenoid in magnetic forming
Full text linkIn the contribution, the theoretical part points out the known starting points for calculating the inductance of a long cylindrical coil. In the practical part, the method of application of magnetic forming in the production of tins in lead samples is presented. The results confirm the correctness of the hypothesis
Workshop production management methods
No full textThe contribution is devoted to a mechanical engineering company, then the methods of workshop production management and the systems that are used in this management are discussed in detail. At the beginning of the practical part, the current state of workshop management is identified using a questionnaire. In the second part, there is an analysis of workshop management in the company and a proposal for improving the given managemen