The application and use of gear mechanisms in machines is now widespread in all industrial areas. With the development of science and technology, especially in the field of control and management of movements of executive members of technological equipment, the requirements for the accuracy parameters of transmissions in the drives of machinery are growing. This applies to parameters specified as torsi (…)
Measuring the potentially adverse effects of materials on the human body is vital and essential for their use, including medical applications. One of the properties that need to be known is the cytotoxic effect of the materials to avoid local and systemic adverse effects. It is very important that scientists and medical professionals are aware of the effects of materials on the human body. This study al (…)
Synthetic hydroxyapatite is used in biomedical engineering for its desirable mechanical properties. But not all scaffolds are biocompatible in use. The safety of implants depends on the competence of medical personnel, manufacturing technology, as well as biological, mechanical and other properties. Although there are regulatory standards for the safety of biomaterials, the assessment of their biocompat (…)
An expansion chamber for narrow part of cavitation nozzles is developed. Designs of cavitation nozzles with expansion chamber based on cylindrical nozzle and Venturi nozzle are proposed. The results of calculations of the fluid flow in the presented nozzles show the areas in nozzle, where cavitation is generated, their number, form and power. The plot of volume fraction of vapor phase shows the causes o (…)
Piping systems are exposed to many negative effects during their operation, which often cause the occurrence and development of various erroneous states that significantly affect the safety and the economy of other operations. Therefore, it is important to test the implementation effectivity of technologies that could be suitable to be used to repair these pipes or their components without system operat (…)
Every day new technology appears. In the field of legged robots, it is not otherwise. LIDAR vision, artificial intelligence, computing power and new drives help to improve the state of legged robots. One of the unsolved problems is still terrain navigation, such as locomotion in resistive terrain. To determine the correct locomotion, research must be carried out. In this paper, we compare two different (…)
The relationship of the structure with the strength, deformation, thermophysical and tribological characteristics of linear block-copolyurethanes based on oligoeters of regular structure oligooxy tetra-methylene glycol is described by mathematical model. Quality parameters are used to estimate the relationship between the structure and properties of the studied materials. The quality parameters allowed (…)
In this study, the enablers of Customer Knowledge Management (CKM) software companies are investigated. Consequently, the conceptual CKM enabler model is developed by extracting “organizational”, “technological” and “human” factors from the literature. Then, a Multi-Criteria Decision-Making (MCDM) approach is applied to identify the dependence relationships of factors by using the Analytic Network Proce (…)
The paper focuses on the research of the influence of chosen technological parameters of die casting on the selected mechanical properties of castings based on Al-Si alloys. The experiments conducted within the frame of the practical part examined the plunger pressing speed in the mould cavity influencing the mechanical properties of a casting which were represented by ultimate tensile strength and pe (…)
The aim of the present research was to create a method for detecting the position and motions of the wrist and fingers at work, to design and create an experimental device to measure and evaluate the training task. Therefore, the issue of finger motions was searched, and the evaluation method was proposed. The experimental device used an optical device for motion monitoring, the so-called Leap Motion, w (…)
The paper describes the concept of improving the efficiency of the process of monitoring the technical condition and evaluating the service life of an asynchronous electric drive of promising trains based on the analysis of diagnostic information of various physical nature, taking into account different types of diagnostic signals generated by individual drive elements and measured using vibration and c (…)
The key elements of a quality management system are a systematic approach to managing non-conformances and continuous improvement. The aim of this paper is to present quality improvement in a seat manufacturing company using statistical methods and quality control techniques. First, Pareto analysis was used to dentify the problem and reveal the critical causes in the management system. Following this, t (…)
The article's subject identifies employee groups affected by the implementation of Industry 4.0 in business practice, either positively or negatively. Apart from the identification of the groups in question, it is essential to name where the disadvantage lies from the subjective point of view of the employees but also the objective point of view. The implementation of Industry 4.0 in enterprises brings (…)
The paper deals with sustainability risks and their measurement in the conditions of small and medium-sized enterprises. SMEs in the context of sustainability have to find solutions to many complex issues because, in the transformation of enterprises towards sustainability, significant changes are needed in all business processes from product development through operational execution, logistics, and mar (…)
This paper is focused on the complex evaluation of the prosthetic socket (of a hand) manufactured by the usage of additive technologies. Main advantage of this method is a significantly shorter production time and lower production cost. The durability of the socket is generally between 12 and 24 months. It is caused by the atrophy of the patient's tissues and also by the mechanical loading during the us (…)
The technology of cold wire drawing belongs to an ancient class of technologies, but their use lasts for centuries. Today, special forming machines, advanced tool materials and effective lubricants are used. In this paper, a progressive physical vapour technology (PVD) of coating for inner surfaces is used which resulted in significant prolongation of tool life. The technology of HiPIMS (High-power Impu (…)
This article focuses on cutting force modelling in the orthogonal turning of two commonly used types of fibre-reinforced plastic materials. Uncoated cutting tool inserts made of sintered carbide and with different rake angles were used for the designed experiments. In addition to the different rake angles in the experiments, there were also different feeds per revolution and cutting speeds. It was found (…)
This article concerns a study of the spur gear noise (i.e. sound pressure level) of automotive gearboxes. The aim is to verify a direct correlation between transmission error and noise emission of a gearing. The article includes a description of some gearbox noise sources and focuses on the gears itself, which is a main source of vibration and noise. A risk analysis is performed to assess the factors (…)
This article deals with the design of a technical diagnostics system for hydraulic rotators and the successful implementation of a unique hydraulic test bench. Based on an analysis of the design and function of all types of hydraulic rotators available on the world market, a system of requirements for the test bench and its place in the test centre was formulated. Furthermore, four diagnostic parameters (…)
This study outlines the methodology of the new approach of laser stripping technique in functional surfaces of monolithic cutting tools. Starting from the initialization test of the coating thickness using a laser calotest including beam-material interaction test, through the introduction of the main geometrical elements necessary for the analysis of the tool, the study discusses segmental laser strippi (…)
The paper deals with the kinematic analysis of the robot model. The matrix method of kinematic analysis is used. The robot mechanism is an open kinematic chain. The position, velocity and acceleration vector of the end point of the robot arm is determined in the Matlab program. Computer simulation is also performed in the MSC Adams program.
The article deals with an example of a non-invasive measurement of the system. The proposed system is suitable in cases where the equipment analysed must be monitored without interrupting its function. The measurement demonstration can serve as proof of the concept of monitoring the state of moving parts of technical systems, such as hydraulic pumps, pressure pumping stations, and large ventilation syst (…)
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