The aim of this paper is to present the possibilities of testing and monitoring of belt conveyances, as well as the possibility of determining the limit states by extreme loads. The newly wrapped strap allows for extreme stresses to determine the deformation point of the belt itself. The design of the wall was based on the basic technological and constructional knowledge gained from the professional lit (…)
In this article, the principle of parametric modeling as an efficient way of designing and processing technical documentation is described on the example of creating a specific parametric model.
When designing any demanding production machine should be chosen minimum necessary set of technical components that are necessary to the achievement of the required functions. Moreover, the quality of fulfilling the functions is closely related to its reliability. One of the basic ways of improving the reliability of technical components of demanding production machines is increasing their reliability t (…)
The technology of electroerosive machining with a shaped tool electrode utilizes thermal energy when removing the material. It results from the continuous repetitive electrical discharges of high intensity between the workpiece and a tool electrode in the presence of a dielectric fluid. The gradual removal (erosion) of metal particles occurs both from the workpiece and the tool electrode, in response to (…)
The paper deals with the method of description of heat exchanger performance. The power of the heat exchanger is usually dependent on the flow rate of the warmer and the flow rate of the colder medium and on the temperature difference of these media at the input. The power of heat exchanger is not a just a value. It is a function of these variables. Different types and designs of heat exchangers have a (…)
The article explores essential prerequisites and effects for automated processes of surface forming in planning manufacturing processes within Industry 4.0. Based on authors’ practical experience and profound knowledge, they describe the adequate use of industrial robots and handlers for automated manufacturing processes. They in depth analyse methods and structures of handling operations and their appl (…)
Magnesium (Mg) and its alloys posse’s great potential for the application of biodegradable medical implants. However, the extensive applications of Mg-based alloys are still inhibited mainly by their high degradation rates and consequent loss in mechanical integrity. Using suitable alloying elements mechanical strength and corrosion resistance of Mg-alloys can be enhanced but cytotoxicity and long term (…)
The authors in their article are devoted to describe the samples production of sophisticated eco-material PLA -PolyLacticAcid extruded horizontally in length, produced by FDM method, Rapid Prototyping. Carried out experimental tests of mechanical properties are presented by the authors in this article. Also in this article eco-materials outputs tested are presented in patterns, measurement protocols rec (…)
The technology of creating a motion mathematical model of an industrial robot manipulator has been proposed. Objective of the presented work is to study the motion features of industrial robot elements. The work result is a robot's computer model, which analyzes the movement elements of product moving parts. For this purpose, a special technique of calculating the dimensional constraints of robot's ele (…)
This paper deals with basic knowledge and problems in area of Fused Deposition Modelling (FDM) technology operation focused on used material testing and operation optimization from economical aspects of view. It belongs to progressive methods of model creation based on geometry obtained from CAD environment with application possibilities in different industrial spheres.
One of the world's biggest problems is the lack of drinking water. The most effective methods are sought for water treatment. The latest methods include sorption on the solid layer. In order to design the arrangement of the cleaning process, it is necessary to know the adsorption isotherm and the kinetic course of sorption. The article contains laboratory experiments designed to determine the sorption p (…)
Gas consumption prediction in buildings is very important with regard to the improved decision making and better energy utilization rate. Our objective is to perform introductory analysis of gas consumption time series in three different types of non-residential buildings (elementary school, national health institute and railway station) using wavelet transform intended for prediction model identificati (…)
The paper deals with a basic design of testing device for testing of separating grilles. It describes a physical principle of particle separation using this grille. It deals with a basic physical-design solution of this device. The device simulates environmental conditions while driving a vehicle and provides a customer with data on separation efficiency of the tested grille. Principally, similar tests (…)
Injection moulding is a major technology in mass production of high quality plastic and composite parts. On the other hand, additive technology is suitable for prototyping, but produced parts do not reach as high mechanical properties as injection moulded parts do. Main advantage of additive technologies is production without expensive injection moulds. Polymer injection mould cavity inserts made by an (…)
The paper is focused on the study of environmental changes and their impact on selected mechanical properties of parts made of photopolymer materials used by the PolyJet technology. Discussion deals with changes in material properties of parts exposed to increased temperature and humidity. Different layer orientations during 3D printing of parts was another evaluating aspect that influenced the final me (…)
This article deals with a 3D printing strategy to reduce supports in the case of overhang geometry on 3D printed models realized by Fused Filament Fabrication (FFF). Experiments were performed to compare the conventional FFF process (normal orientation to the platform) with a novel strategy of 3D printing using 6-axis degrees of freedom to orient the nozzle close to the tangent direction of the 3D print (…)
The paper deals with comparison of tensile, flexural and impact characteristics of parts produced by injection moulding technology and Fused Deposition Modeling (FDM). The influences of various layers’ thicknesses and their orientation on the final mechanical properties of printed parts were also among the evaluated factors. ABS and PC / ABS materials were selected for the study and the analysis of the (…)
The paper deals with the influence of the recycling of 1.2709 powder steel on porosity of the components produced by selective laser melting technology (SLM). One of the main requirements for the parts produced by SLM is to achieve good mechanical properties. The presence of pores, typical defects in the SLM produced material, is one of the causes of the mechanical properties reduction. In particular, t (…)
In case of production of die casts utilizable especially in expansively growing automotive industry, the particular attention is devoted to a goal-oriented increase of commercial and utility properties of a product in with acceptable economical costs. In the experimental part of the submitted paper the influence of technological factors of die casting and of hardening temperature upon mechanical propert (…)
This paper discusses the possibility of increasing the surface load capacity in C60E steel gearings by applying selected thin coatings. It describes the effect of tribological characteristics, such as friction coefficient, wear, adhesion and hardness of TiCN coating on convex-concave gearing (C-C). The average thickness of TiCN is 3.3µm. Delamination of the TiCN coating was recorded at a load of app (…)
During milling, the process forces and poor dynamics of the machine may lead to undesirable vibrations between workpiece and tool. The magnitude of these vibrations and the chatter tendencydepends mainlyuponthe dynamic properties of the Tool-Machine-Workpiece system. The dynamic properties of the workpiece can vary significantly during the cutting process, while removing a large volume from a workpiece. (…)
The appropriate way of measured data visualization is an important factor which has a significant impact to its quality as well as to the speed of the data analysis. Especially when the analysis is carried out by a multidisciplinary team. The virtual reality is one of the techniques used for data visualization. It is progressive technology which enables better and faster understanding to visualized data (…)
In this study results of various simulation methods are evaluated used for design of experimental prototype rover. The proposed rover must satisfy requirements for operation in specific conditions. Simulation environment of V-REP software is used for verification of proper functionality of kinematics of the rover and for the draft of fundamental parameters. Deformation of beams are simulated in the Stru (…)
The Department of Robotics at the VSB-TU Ostrava has been long-term involved in the improvement of parameters in parts produced by additive technology. It primarily concerns component parts as well as bigger functional units of mobile robots. However, it is not exceptional to produce a complete bearing frame of a mobile robot or an effector with the majority of parts produced by additive technology. Thi (…)
The article describes modifications to the effector of a manipulator arm proposed in order to increase the accuracy of jaw force measurements. Gripping force measurement is performed using strain gauges. Their proper positioning and connection minimize not only the influence of the position of the centre of gravity of the manipulation object on the jaws but also the effect of temperature changes around (…)
This paper describes the possibilities of using the Ballbar QC20-W diagnostic tool for long-term monitoring of geometrical accuracy of CNC machine tools. By introducing regular checks, the production capability and the planned machine maintenance should be increased. The publication presents the results obtained from a case study. The case study describes the procedures and results of introducing a regu (…)
To provide an efficient elevator system, a variety of diverse and sometimes conflicting constraints have to be solved. This paper focuses on using discrete event simulation as a means to model and explore elevator dispatching strategies. Witness simulation software has been used as a test-bed for model building, simulation and some experimentation. Model building using Witness model elements is describe (…)
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