March 2021
In this paper, in order to achieve the required properties, several numerical simulations of pressure loading of the welded manhole cover are performed. The analysis of displacement and stress using the finite element method in the software NX Siemens 12 were conducted. Verification of numerical results was done by performing prototype testing consistion of the permanent deformation test and a loading c (…)
PLA is one of the most widely used materials in additive technology, especially in the Fused Filament Fabrication method. However, its use is limited by its relatively low-temperature resistance. The glass transition temperature of PLA is around 60 °C. Some studies already performed on the annealing of 3D printed plastics have shown their increased heat deflection temperature. However, the interpretatio (…)
AM (Additive Manufacturing) is an increasingly widespread technology in the world. This technique was used in the present work to deposit material on the baseplate in order to find out its ability to repair damaged parts (baseplate material). The material of the baseplate was AKT1TD martensitic steel used in the aviation and energy industry. The steel could suffer from corrosion and erosion, and AM coul (…)
The work is focused on the design solution of fixing the exchangeable working rolls into cross-wedge rolling machine. The tools are clamped to the cylinders. In case of technology change, the tools must be replaced. Tools can be changed directly on the machine, this is a non-productive time. Another way to change tools is to replace entire cylinders. The diameter of the rollers is large, so the rollers (…)
The aim of this work was design of alternative solution of milling head housing with help of topology optimization. Mechanical properties of new alternative housing solution (specifically a stiffness) are based on the existing milling head IFVW10x manufactured by the ŠMT a.s. company. The stiffness of existing milling head was determined using KISSsys calculation software, as well as the stiffness of th (…)
This paper presents a new serial asynchronous Bus, using standardized digital input and output from a PLC system for the hardware layer. The data frame and time setting are described to illustrate the need to establish a new serial bus for study. Our selected implementation within a warehouse robot is presented as our industrial case study. It is our study case in the industry. This presented bus can be (…)
In modern machine tools, spindle units significantly contribute to thermo-elastic tool center point (TCP) errors. Correction models to compensate axial spindle expansion are currently based on linear temperature models. Despite existing expert knowledge of spindle manufacturers, considerable modelling effort and empirical studies are required to parametrize appropriate models. As a result, the experimen (…)
The presented paper deals with the influence of coloring additives and the setting of process parameters of 3D printing on the mechanical and surface properties of samples made of PLA material. The paper characterizes the process of filament production, as well as the printing of normalized samples on a 3D printer using the additive method Fused Filament Fabrication (FFF). The effect of 3 types of color (…)
The relationship between the structure, physical-mechanical, and elastic-deformation characteristics of newly formed nanocomposites based on a mixture of PP/PA-6 (Polypropylene/polyamide-6) with montmorillonite (MMT), which was modified with polyvinylpyrrolidone (PVP), is investigated in this work. The influence of the content of modified PA-6 on the nature of its distribution in the polymer matrix of P (…)
We understand the maturity of an industrial enterprise in the context of the fourth industrial revolution as the state of the of internal and external conditions that support basic concepts of Industry 4.0 such as vertical and horizontal integration of production systems and enterprises or digital integration of engineering throughout the value chain. The ongoing trends of digitization and automation ar (…)
When designing lattice structures, or even structures in general, standard profiles are often used. These are profiles of I, U, T, L, SHS, RHS, CHS, EHS shapes, etc. All the basic formulas for stiffness and strength calculations are known for standard used profile shapes. However, in established practice there are no approaches for simply optimization or for evaluating the stability of profiles. This pa (…)
When measuring large and flexible parts, specialised measuring and clamping jigs are used as the standard, which fix the part to the required position. However, because the production of such jigs is time consuming and very expensive, software tools have recently started to appear on the market, which allow even large flexible parts to be measured in a free state and to use so-called virtual clamping fo (…)
The article deals with the created model of a smart factory using the principles of Industry 4.0. It is the creation of an autonomous manufacturing system, which combines into one unit the means of production, such as machines, handling units, warehouses, etc., as well as human resources and information flows. The manufacturing system is not centrally controlled, but each unit has its own control system (…)
This paper deals with piezoelectric strain measurement for rail monitoring applications. Piezoelectric materials under mechanical load generate electric charge and thus provide active voltage response. Mechanical parts with piezoelectric sensing layers could provide electrical signal which is proportional with mechanical loads and vibration. Presented piezoelectric system in the form of a macro fiber co (…)
This paper presents a new way of developing machine software for the automation industry. This example focuses on a 3D printer intended for printing cement mixtures. The mechanical and electrical construction is shown for clarification. New mappTechnology by a company called B&R is explained, highlighting its benefits t for software developers. Both the advantages and disadvantages are discussed at the end.
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