Transmission of vibrations into the cabin while driving and the general comfort of the driver is essential for agricultural and heavy-duty vehicles. Due to long working hours and rough terrain during operation, reduced attention or health problems may occur when significant vibrations are transferred from the vehicle chassis to the driver. One of the modern damping systems which can drastically minimise (…)
High-performance electronic parts are vital features in almost all modern motorized machines. These silicon components are significantly minimised, especially in transportation branch. Concentration of performance requires perfect cooling conditions. A fluid flow cooling by an active cooling circuit with heat sinks is a commonly used principle. Sufficient cooling and uniform temperature field on heat tr (…)
This paper compares the results of a real linear synchronous motor and its digital twin. It differs from other common publications in that it uses only basic mathematical models representing a particular physical principle. In this way, a minimum of input parameters was achieved. At the same time, all model input parameters are normally listed in the motor datasheet or are easily measurable. Nowadays, d (…)
This research aims to obtain the optimal honeycomb hybrid crash box design. Finite elements, parametric studies, and multi-objective optimization are carried out sequentially. Parametric studies are carried out to obtain important parameters to increase energy absorption and minimize mass. The effect of structure angle, honeycomb side length, and structure thickness are selected as the design paramet (…)
The track components that are the most heavily loaded from the axles of train units are the switch components and rail crossing parts. These parts can be refurbished by welding on suitable types of additional materials. Parts made of high-alloyed Mn-steel (Hadfield steels) need to meet specific conditions for their welding. For the experiment, ESAB OK Tubrodur 14.71 and ESAB OK Tubrodur 15.65 materials (…)
The simulation of mass motion using a vibrating device that was laboratory designed was the main idea of the work. The construction of an experimental vibrating device and the associated measuring station along with the measurement of dynamic properties of the vibrating device depending on preselected input parameters of the device of bulk material on this experimental model is presented. The simulation (…)
In many technical fields, it is necessary to have a basic set of mathematical skills. Engineers need to calculate and understand concepts. They have to know how to solve equations, analyse measurements, use tables and graphs for some processes. These are just some examples showing how mathematics learning is important. For better illustration and visualization of mathematical concepts and methods, it is (…)
The effective power of an internal combustion engine is determined by the amount of air that is drawn into the cylinder. One of the basic requirements for the intake is the even filling of all cylinders. This paper deals with the design of an airbox 4-cylinder 2.2 liter naturally aspirated SI engine. The CFD simulation of the air flow through the serial airbox was performed. This showed an uneven fillin (…)
The paper deal with a mathematical model of a pneumatic system and simulation of its behaviour. In the Matlab-Simulink Simscape program, there are models of basic elements from which it is possible to build a model of the entire system. The article describes the gradual testing of pneumatic elements mathematical models on the base of comparison with experimental data.
In this paper, root stress, manufacturing possibilities and limitations of standard and nonstandard tooth root fillet of spur gears are examined. Nowadays, standard trochoidal root fillet is used the most as an economical trade-off between tooth strength and manufacturing complexity. A disadvantage of the trochoidal root fillet, especially in spur gears with less than 17 teeth, is undercutting which min (…)
In recent years, topological optimization has become a powerful tool for designers and engineers in the technical world. The principle of this method is based on optimizing a given optimization region by minimizing or maximizing one or more objective functions, e.g. stiffness, mass, or natural frequency of the structure. For this reason, software companies developing CAD or FEM software have included to (…)
Production and maintenance processes are inherent in the life cycle of every product. Despite great efforts to automate these processes, a great deal of human resources are still required, which represent a significant part of the financial costs. Each process is composed of sub-tasks that require certain specifics in terms of the number of staff, their expertise, qualifications and experience. It is as (…)
This work compares different thicknesses of vitreous enamel coating applied to welded joints. Low-carbon steel Kosmalt E300T was used as a base material. The MAG welding method was used for all samples. Metallography was performed to compare the thickness of the coating formed on the machined and unmachined surfaces of the weld. SEM analysis focused on the substrate/vitreous enamel coating interface. Th (…)
Optimisations in production processes are routine in most engineering companies. The possibility of using simulation is crucial for the industry in the 21st century because it provides an opportunity to verify many variants in a very short time. The results obtained in this way can then contribute to faster decision-making in the field of manufacturing process optimisation. The paper includes a case stu (…)
Microstructure evolution of hot extruded AZ31 magnesium alloy during twist channel angular pressing was investigated. The grains were refined significantly after one to four passes at 200°C. Microstructure evolution after TCAP processing was investigated using optical microscopy, transmission electron microscopy and electron backscatter diffraction. The results show effect of TCAP process on the achiev (…)
The article deals with the analysis of the unconventional pressing process of metallic materials by twist channel angular pressing (TCAP) method. TCAP process is a modification of the equal channel angular pressing (ECAP) forming method, which can be used to prepare bulk materials with an ultra fine-grained structure. Simulation of the TCAP process is an important source of information on the effect of (…)
This paper discusses a suitable method to manufacture contactor forgings, depending on the size of the series. A suitable semi-finished product and the method of cutting have been proposed. The design of a suitable forming machine and forging tools was carried out for the production of contactor forgings in the number of 10,000 pieces and 50,000 pieces per year. The LE 160 eccentric press was designed t (…)
Process optimisation in production is an integral part of management in all companies. Given the constantly increasing pressure from customers, companies are forced to take steps to satisfy them. These steps include, above all, increasing production capacities and optimising production and service processes while maintaining or minimising all costs. The changes implemented today should be oriented towar (…)
This paper deals with vibration analysis of a V-Belt drive based on altering conditions of pulleys misalignment. The main question this paper tries to answer is whether there is a direct and measurable relation between the pulley misalignment conditions and vibration of the machine. Using the ADASH vibration analyser with accelerometer sensors and laser speed sensor attached, we gathered data from our t (…)
Friction stir welding (FSW) is a solution to overcome the problems of AA 6061 welding. When the initial temperature T0 of the material is increased during the FSW process while the FSW process parameters are kept constant then FSW welding parameter value can be lowered. T0 was varied by Troom temperature, 50 0C, 75 0C, 100 0C and 125 0C. The weld joint design form is a square butt joint. By using this a (…)
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