Manufacturing Technology Journal, 2017 (vol. 17), issue 3
The Effect of the Tool Wear on the Correlation of Forces on the Face and Flank Surfaces of the Cutting Tool
Sergei Babak, Alexey Popov
Manufacturing Technology 2017, 17(3):283-287 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/283 
A new comparison method of the total forces for different contact areas has been published which allows increasing determination accuracy for cutting forces on flank surface. In this regard, on the basis of the new method the laboratory of the Department of Machining and Assembly of the Technical University of Liberec has carried out a study to determine the effect of tool wear on the correlation of forces on the face and flank surfaces of the cutting tool when cutting various materials.
FOD Experimental Simulation and Analysis of Potential Benefits of Modified Blisk Geometry
Libor Beránek, Zdeněk Pitrmuc, Jan Šimota
Manufacturing Technology 2017, 17(3):287-291 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/287
The article deals with testing of the resistance against Foreign Object Damage (FOD) on leading edges of blisks (blade disks) in turboprop engines made of Ti6Al4V alloy. Such damage can occur during operation, when rapidly rotating compressor parts on the engine intake are exposed to foreign particles. E.g. operation of small passenger aircrafts in desert areas, where large amounts of foreign particles occurs in the atmosphere. The paper describes the development of method for testing the resistance of the leading edge of the blades against FOD in order to mimic the conditions of operational damage. Further it quantifies potential benefits of modification...
Strength Analysis of a Structure for Attachment of a Winch on SUV
Miroslav Blatnický, Ján Dižo, Mária Štauderová
Manufacturing Technology 2017, 17(3):291-295 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/291
The paper deals with design proposal of a cover part of a strength bumper, which is tasked with creating the outer design lines of an automobile without sharp edges according to legislation in force and also with protecting a vehicle against damage. The cover part serves for covering the strength part of a back strength bumper, which will be equipped with a winch and used in off-road vehicle Nissan Patrol Y61. Another aim is to perform a FEM analysis of the strength part of the bumper loaded by towing force of the winch and thus to verify a safety of the structure. The next solution of the issue will be an approach to real testing, which will verify...
Dynamics of Linear Hydraulic Cylinder with Mass Load
Adam Bureček, Lumír Hružík, Martin Vašina
Manufacturing Technology 2017, 17(3):296-302 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/296
The paper deals with examination of dynamics of linear hydraulic cylinder with mass load. The hydraulic cylinder is placed in vertical position. There is experimentally simulated a system state. In this case a higher piston velocity is achieved due to the mass load compared to the piston velocity that corresponds to a supplied flow. A piston oscillation of the hydraulic cylinder is caused by rapid stop of movement in a desired position. There are experimentally evaluated eigenfrequencies of the linear hydraulic cylinder depending on the piston position and the mass load. Mineral oil was used as the working liquid. Time dependencies of pressures are...
Effect of Selected Factors on the Accuracy of Load Capacity of the Schoen Gyroid Cellular Structure
Pavel Hanzl, Ivana Zetková, Miroslav Zetek, Martin Štěpánek
Manufacturing Technology 2017, 17(3):302-306 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/302
One of the roles of mechanical engineering is to improve the efficiency and performance of mechanical parts. Cellular lattice structures can be a good tool for achieving this target. This paper focuses on a specific kind of lattice structure which is composed of cells called a Schoen Gyroid. Samples containing this porous structure were subjected to a series of pressure tests. The main aim is to find the possible influence of certain factors on the accuracy of the load capacity. The selected factors are the friction between the porous sample and the testing device, then the matrix size of the samples. The discovered relationships of these factors on...
Impact of Wheelset Steering and Wheel Profile Geometry to the Vehicle Behavior when Passing Curved Track
Vladimír Hauser, Olena S. Nozhenko, Kateryna O. Kravchenko, Mária Loulová, Juraj Gerlici, Tomáš Lack
Manufacturing Technology 2017, 17(3):306-312 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/306
Ride of vehicles along curved track is a serious technical problem, which for the long term requires attention of vehicle engineers as well as track designers. It is especially interesting to observe behavior of tram cars passing a curved track, because they should be able to pass arcs up to 17 meter radius. Ride of a vehicle along such strongly curved track is nowadays accompanied by significant wear in rail-wheel contact, increased bogie and track stress and by generation of noise. One of the key causes of this unfavorable phenomenon is an increase of slip velocities in rail-wheel contact. This paper is based on simulation analysis, which compares...
Precising of Vehicles Handling Valuation
Milan Chalupa, Josef Veverka
Manufacturing Technology 2017, 17(3):312-319 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/312
The article describes the possibilities of vehicle passability testing by the help of computational simulation. It is used here computing simulation system ADAMS AVT. The simulations can help to find quick answers to basic and additional questions of design change influences in the area of testing vehicle passability. The first part of the article contents description of partial computation simulation models construction which the calculations are associated with. There are mentioned the binding conditions of calculations also. There are mentioned and evaluated the results of performed simulation calculations in the second part of the article. These...
Some Aspects of a Manufacturing Process Simulation
Alexej Chovanec, Alena Breznická
Manufacturing Technology 2017, 17(3):319-325 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/319
The submitted paper presents possibilities of a simulation for a real manufacturing process in a company taking the risks into consideration. The risks may result from various sources in manufacturing environment. The most significant ones include a human factor, the processes in general and environs where the manufacturing process takes place. Risk can be viewed as a state where there is a possibility of a loss but also a hope of gain since one would never jeopardize the loss if there were no chance of a win. Because of the argument that a risk is perceived differently depending on the observer's experiences and objectives, it has become increasingly...
The Use of Material-Technological Modelling to Determine the Effect of Temperature and Amount of Deformation on Microstructure Evolution in a Closed-Die Forging Treated by Controlled Cooling
Štěpán Jeníček, Ivan Vorel, Josef Káňa, Kateřina Opatová
Manufacturing Technology 2017, 17(3):326-330 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/326
From the initial feedstock to the final product, the manufacture of forged parts is a highly complex process in which a large number of technological factors play their role. These factors are associated with temperature and the amount and rate of deformation. Developing a manufacturing route often involves major effort being put into finding optimum production parameters with respect to boundary conditions which mainly comprise customer requirements and financial aspects. In order to determine an optimum set-up for forging production or to introduce a new technology, a number of essential steps must be taken and sometimes repeated. In this context,...
The Effect of Surface Pre-Treatment and PVD Coating Post-Treatment on Texture of Surface ASP2052®/Tin
Ondřej Klanica, Emil Svoboda, Karel Maňas
Manufacturing Technology 2017, 17(3):331-335 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/331
The aim of the paper is analyse changes of the surface texture during pre-treatment, PVD coating and post-treatment. Generally, the effect of the production technology is often discussed with well-known parameters such as material, geometry of tools, coating methods and conditions. Effect treatment of the substrate or tools manufacturing are mostly ignored. Pre-treatment, coating and post-treatment obviously change surface texture. Quality of surface or surface texture together with properties of the surface layer have a significant effect of lifetime and reliability of operation component in practice. Surface texture effect running accuracy components,...
The Effect of the Shape of Chip Cross Section on Cutting Force and Roughness when Increasing Feed in Face Milling
János Kundrák, Károly Gyáni, Csaba Felhő, István Deszpoth
Manufacturing Technology 2017, 17(3):335-342 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/335
In this paper, the results of an investigation done with face milling are presented. The changes in cutting force and surface roughness were studied through changing the values of depth of cut and the feed per tooth. Meanwhile the permanent value of the undeformed chip cross section, which was determined (fz and ap), remained permanent. Increasing fz and keeping the same value of Ac chip cross section, the ratio ap/fz changed in five grades from 0.5 to 8. It is shown, that if the feed is increased in the examined range so that the chip cross section is constant, then the value of the cutting force decreases, which decrease can be observed in all three...
The Use of Simulation Programmes for the Structural Analysis and Engineering Optimization of Gating System Structures for Use with High Pressure Die Casting Technology
Ján Majerník, Ján Kmec, Miroslav Gombár, Martin Podařil
Manufacturing Technology 2017, 17(3):343-347 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/343
A properly designed and engineered gating system for use with high pressure die casting technology will produce castings with excellent mechanical properties. The gating system must secure the fast and continuous filling of the cavity. An appropriately designed and structured gating system can reduce the length of the die casting process, thereby increasing the effectiveness of production, reducing the amount of waste, and delivering cost savings. This article focuses on the structural analysis and optimization of runners and their impact on the mould casting of a specific light-weight casting made of AlSi alloy.
The Influence of the Technological Parameters of Rolling in the Helical Rollers and Longitudinal Wedge Mill on the Quality of Two-Phase Titanium Alloy
Aigerim Mashekova, Adilzhan Nurtazaev, Serik Mashekov, Aiman Alshynova, Elmira Tussupkaliyeva
Manufacturing Technology 2017, 17(3):347-354 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/347
This article presents a new technology of obtaining the flat products with an ultrafine structure. The ultrafine-grained structure is obtained by using severe plastic deformation which is developed by the helical rollers. The stress-strain state (SSS) of the workpiece during rolling process in the helical rollers and longitudinal wedge mill is investigated in this scientific paper. The quantitative data has been obtained by the finite element method and MSC.SuperForge software; as well as the basic SSS distribution patterns, the temperature in simulating the rolling in the helical rollers and longitudinal wedge mill with different number of passes...
Generating Random Pattern for Homogenization of Fiber Reinforced Composites Using Memetic Algorithm
Peter Pecháč, Milan Sága, Lukáš Smetanka, Martin Močilan
Manufacturing Technology 2017, 17(3):354-360 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/354
The paper presents solution to random generation of fibers in composite materials for homogenization using representative volume. Randomly positioned fibers with random diameters of constrained sizes are generated within predefined representative volume, while minimal gap between fibers and volume ratio of fibers in the matrix is maintained. The problem of random generation is solved as an optimization problem using a custom memetic algorithm designed by the authors. A comparative study was performed, comparing performance of memetic algorithm and genetic algorithm.
The Corrosion Resistance of Turbocharger Stator after Plasma Nitriding Process
Ondrej Pilch, Petr Faltejsek, Vojtěch Hrubý, Michal Krbaťa
Manufacturing Technology 2017, 17(3):360-364 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/360
The plasma nitriding technology was applied on the turbocharger stator wheel. Martensitic stainless steel X12Cr13 was choosen for the experiment. The influence of plasma nitriding process on the corrosion resistance of selected steel was investigated. The chemical composition of selected steel was verified using the Q4 TASMAN device. After plasma cleaning procedure was plasma nitriding process performed using two stage nitriding procedure. The microstructure and mechanical properties of the nitride layers were studied using optical and laser confocal microscopy and hardness testing. The depths of plasma nitride layers were also estimated using cross-sectional...
Effect of Hydraulic Oil Entering the Cutting Fluid on the Tool Life and Roughness in Milling of Stainless Steel
Alexey Popov, Robert Schindelarz
Manufacturing Technology 2017, 17(3):364-369 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/364
The use of cutting fluid increases the tool life and reduces the roughness of the machined surface. However, during the machining the oil from the hydraulic system of the machine often gets into the cutting fluid, which can alter the properties of the cutting fluid. In scientific literature there is no information on the effect of the hydraulic oil entering the cutting fluid on the tool life and roughness. In this regard, at the laboratory of the Department of Machining and Assembly of the Technical University of Liberec, there has been conducted a study to ascertain the effects of hydraulic oil getting into different types of cutting fluids during...
Application of Brakes on Cranes in River Ports
Danka Rakúsová, Ivan Kopecký, Peter Lipták
Manufacturing Technology 2017, 17(3):369-374 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/369
In the last decades, advanced brake technology in the port sector follows the global productivity developments of the international maritime trade. Container vessels are getting bigger and bigger and the ship to shore cranes is getting consistently higher. But service, emergency or storm brakes cannot be getting bigger and bigger to meet these increasing demands. Throughout history, innovations and advancements in technology have made industry better through automation and increased efficiency. No matter how advanced industry becomes, the need for emergency duty stopping brakes will not go out of style because there are always circumstances that require...
Production of Planetary Mechanism Model Prototype using Additive Method of Rapid Prototyping
Josef Sedlak, Barbora Kudlacova, Oskar Zemcik, Ales Jaros, Martin Slany
Manufacturing Technology 2017, 17(3):374-381 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/374
An article deals with a production of a planetary mechanism model prototype using an additive method of Rapid Prototyping (RP) by a 3D printer called uPrint. The first part of the article contains a theoretical analysis of a main principle and kinematics parameters of the planetary mechanism model. The second part begins with an experimental analysis of a planetary assembly calculation and continues with a description of a production process of all individual mechanism parts and description of the final completing of the planetary mechanism prototype. The final part deals with a characterization of ABS styrene polymers generally used for production...
Freight Bogie Prototype Properties Analysis by Means of Simulation Computations
Pavol Šťastniak, Marián Moravčík
Manufacturing Technology 2017, 17(3):381-388 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/381
The object of this article is to analyse the stability of changed three axle rail bogie structure, which is characterized below by higher axle loads combined with good operational properties. The occasion of change was the unstable behaviour of the system during prototype development. For validation of the structure design, there has been created a substitute simulation model in program Simpack, by which the computations were performed for partial system. Model represents only elasto-kinematic properties of the system. For stability analysis of the system, there have been a set of boundary conditions from different degrees of freedom to state out of...
Application of FE Modelling of Machining Using DEFORM™
Filip Tikal, Miroslav Zetek, Tomáš Kavalír
Manufacturing Technology 2017, 17(3):389-393 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/389
DEFORM™ is a robust modelling software tool which uses the finite element method (FEM) for modelling technologies in 2D and, naturally, in 3D. One of the processes, the modelling of which DEFORM™ supports, is slab milling.For this purpose it uses an advanced FE model with various parameters, such as the fracture criterion. If their values are not chosen correctly, the desired results cannot be obtained.A 3D simulation model was developed to explore the capabilities for entering data, calculating and evaluating temperature distribution within a workpiece during experimental milling carried out under real-world cutting conditions....
Taylor Equation of Durability and Its Modification
Karol Vasilko
Manufacturing Technology 2017, 17(3):393-397 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/393
Recent development of the application of new kinds of material in transport and production technology places higher requirements on the technologist at the determination of cutting conditions. The assortment of recent kinds of cutting material enables to intensify cutting conditions while maintaining acceptable tool durability. The dependence of tool durability on cutting speed, or "basic law of machining", is the basic means to determine tool durability at selected cutting conditions. The paper contains a suggestion to modify the original Taylor equation on recent conditions of productive machining.
Kinematic and Dynamic Analysis and Distribution of Stress in Items of Planar Mechanisms by Means of the MSC ADAMS Software
Ján Vavro jr., Ján Vavro, Petra Kováčiková, Radka Bezdedová, Jakub Híreš
Manufacturing Technology 2017, 17(3):397-401 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/397
This paper presents a kinematic and dynamic analysis and distribution of the stress in items of a planar mechanism by means of the MSC ADAMS software. Graphic dependence of kinematic and dynamic magnitudes of some points is given in dependence on the angle of rotation of the driving item and in dependence on the time. Distribution of the stress in the items presented is in [Pa]. In relation to the kinematic and dynamic analysis and subsequent simulation [1-3] of the planar as well as spatial mechanisms, it is great solution to use MSC Adams software program. The considerable advantage of this mentioned program is based on its simplicity from the aspect...
Use of Technical Diagnostics Means in Industrial Practice
Marián Výžinkár, Dominik Gašparovič, Jozef Žarnovský, Ivan Kováč, Rastislav Bernát
Manufacturing Technology 2017, 17(3):401-407 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/401
Use of means of technical diagnostics gains in today's period increasing importance in all areas of industrial activity. Due to the tightening of the limits, software and hardware solutions improving is the diagnosis of the building one of the most important area in manufacturing and non-manufacturing organizations. The aim of the article is to clarify the possibility of using diagnostic procedures in the form of georadar to monitoring of location and status of reinforcement in a ferroconcrete bearing wall. For measuring was used radar system Mala CX12 with accessoriesand based on selected aspects has been diagnosed the exact location and status of...
Research on Mechanical and Electrical Properties of Carbon Nanotubes Reinforced Cement-based Materials
Tian Xiushu, Wu Dongdong, Liu Qiongyao, Konglijuan
Manufacturing Technology 2017, 17(3):407-411 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/407
In this paper, the effects of carbon nanotubes on the mechanical and electrical properties of cement-based composites at different ages have been studied. The structures were characterized by SEM. The experimental results show that the higher content of carbon nanotubes may enhance the strength, when the content of carbon nanotubes is 0.1%, the 3d flexural strength increases about 60.6%, 28d strength increases about 57.4%, the 3d compressive strength increases about 33%, 28d strength increases about 11.6%. Highly dispersed carbon nanotubes can form uniform network structure in cement paste, so the mechanical properties of composites can be greatly...
A Mechanistic Model for Prediction of Cutting Parameters in Micro-Scale Milling
Jinfeng Zhang, Chao Feng, Yunhui Ma, Wei Tang, Shuai Wang, Xin Zhong
Manufacturing Technology 2017, 17(3):412-418 | DOI: 10.21062/ujep/x.2017/a/1213-2489/MT/17/3/412
While down-scaling of micro milling process is similar to the conventional process, there are specific issues that differ from macro machining due to higher ratios of feed per tooth to tool radius and tool run-out to tool diameter, size-effect, minimum chip thickness, elastic-plastic deformation, microstructure effects, etc. One of the challenges in micro machining is attaining accurate and reliable machining parameters, which can reduce tool wear and breakage to achieve higher productivity and quality at a lower cost. Therefore, this paper presents a new mechanistic model for predicting the precise process parameters considering material properties...