June 2022
The control systems of modern robots are multilevel. The upper level control of the transport robot by voice commands and simulation of its motion in the software product Microsoft Robotics Developer Studio are considered. Visual Programming Language for creating and debugging applications was used to simulate the motion of the transport robot. An Android tablet or mobile phone with an application is us (…)
This paper presents the results of FEM (Finite Element Method), CFD (Computational Fluid Dynamics) and modal analyses of model semi-axial pump. Two sets of impeller blades were printed by metal 3D printing technology with internal honeycomb structures. The set of solid blades, manufactured by CNC machining for a comparison, was also included. 3D printed blades were designed with internal structures (…)
Inverse stamping is a useful tool in engineering. It can be used to find the initial blank shape of stamped parts. It is also useful for quick and easy analysis of a forming process and its impact on the design of a component. Algorithms for inverse stamping are commonly available, but in some situations these algorithms can collapse or may provide confusing results. This article describes improvements (…)
At the studying the Mannesmann piercing process, we unify two approaches to the problem solving. Namely, the commercial FEM software procedure and the mathematical model of the process via the mathematical model of the considered FEM-simulation bound by certain unifying symmetries. Such phenomenon seemingly exists only if the FE-mesh is initiated to be physically interpreted. We shortly outline, how to (…)
This article discusses the main aspects related to the software of the automated system «Lineika». The main function of the CAM «Lineika» is to assess the predictive complexity and cost of manufacturing parts and products of tool production. The system provides an automated calculation of the above technical and economic indicators for the following groups of class 28, allocated by regulatory documents: (…)
This article examines the possibility of determining the optimal amount of inventory for an assembly line with a small number of parts. The optimization process is done using linear programming methods, specifically the enumerative method, and its results are compared by an approximation method that does not require such a number of iterative steps. The procedure of creating a purpose function defined c (…)
The dynamic performances of the machine tools have decisive influence on the achievable accuracy and productivity of the machining processes. For reducing the unfavourable vibrations of machine tools, a system of multi tuned mass disc dampers (MMD system) is developed in this paper. The simulation model of a portal milling machine is built on its CAD model. Thenceforth, the simulation model is parameter (…)
The affordability and ease of programming of collaborative robots (cobots) is a critical factor in increasing their widespread use in many automated processes (assembly processes included). Therefore, the task of this article is to offer a suitable methodological approach to the design of a collaborative application concerning the necessary flexibility wherever a significant change or reconfiguration of (…)
The main goal of this paper is to create a computer crash model (up to the level of the double mass-spring-damper model, which is described by a system of two differential equations and where the stiffness and damping coefficients - physical parameters are calculated using the Matlab function Y = solve (eqns) - Equations and systems solver) using measured real data obtained from a frontal impact of a ve (…)
[Brecher 2021] presents a new, cost-efficient, machine-integrated measuring method for thermo-elastic errors of three-axis milling machines. The setup consists of a spindle mounted position-sensitive diode and a thermo-stable laser frame on the table. The initial paper contained a rough estimation of the measurement uncertainty and the uncertainty of the measureable errors. This work presents a detaile (…)
The paper presents a mathematical model of the helical surface roughness Rz, obtained by the form-generating method with a to-size tool with a standard profile of cutting tool inserts. This machining method has maximum productivity with large pitches of the helix. The surface roughness of the auger flight is an important parameter since it works in a friction pair with an elastic element. The resulting (…)
The article describes the renovation of repeatedly worn shearing tools working cold up to 200 °C. The material from which the cutting punch is made of carries the trade name CALDIE. It is delivered from the smelter in the condition after soft annealing and subsequently it is refined. A worn or damaged edge is chamfered and welded afterwards by technology of micro-TIG in pulse mode. To restore the geomet (…)
Designing a robotic workplace is a time and knowledge intensive process. It requires systems engineers who specialise in the design of this type of workplace and have the appropriate know-how in this area. Due to the time-consuming nature and the small number of experts, a small number of solution options are often created, from which the most suitable one is subsequently developed. The aim of the deve (…)
Partload regimes of all types of centrifugal pumps are strongly and unfavorably affected by an influence of an inlet recirculation. This negative phenomenon usually occurs at pump suctions, when a circumferential velocity component of the fluid flow (derived from a rotational speed of a rotor) is dominant over an axial velocity component. Such physical effect goes hand in hand with a creation of a pump- (…)
Thin hard layers deposited on cutting tools known as ‘coatings’ serve as a protective barrier against abrasion and adhesion wear, while also protecting against thermal and chemical processes that deteriorate the cutting performance of the tool. Coating properties including non-zero thickness, surface roughness, and chemical composition affect the cutting process significantly when compared to uncoated (…)
In today's age of technical and technological development, the market requires many products, with an emphasis not only on price but also on quality. To meet these requirements, new technologies and production processes are constantly being developed. These technologies and processes lead to modernization of equipment, the purpose of which is to increase production efficiency and productivity. The ever- (…)
Development of the territories with specific climatic conditions requires the selection of effective materials. Multilayer composite materials are suitable for these purposes in road construction in the Arctic. The article presents a design scheme for a multilayer road surface, which is used to determine the collection of traffic loads. The method of solving the inverse Cauchy problem and the empirical (…)
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