Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
In the paper method of path planning for Automated Vehicles (AGVs) tracking the markers on the surface and advantages as well as disadvantages of graphs approach have been presented. The requirements for autonomous control of AGVs and constrains for vehicles without the feedback as well as results of the control algorithm tests are given. The problems of AGVs applications in the manufacturing systems...
The work presents results of the experimental research on the influence of roughness on the value of plastic deformation under normal loading, which exceed yield limit of material. The experiments were performed on both anisotropic and isotropic surfaces what enabled to evaluate the influence of directionality of geometrical surface structure on contact deformations. A degree of deformation of roughness...
The subject of my thesis is: testing influence of technology parameters (t-on, t-off, I) to material removal surface quality Ra and material removal of tool-electrode and to study the effects of ultrasonic assistance on electrical discharge just like resonance of discharge pulse frequencies and ultrasonic frequencies. The first results show that the ultrasonic with EDM rising productivity, gives better...
The paper continues the description of the research described in Part I, concerning the influence of an interlayer material, its thickness, on the level of residual stresses in the alumina-heat resisting steel joint. The results presented in this part of paper concern the influence the layer of a gradient material and the profile of its inner structure have on the state of residual stresses in the...
The development of techniques of magnesium alloy production resulted in increased application of parts made of these alloys in industry of trasportation means, mainly in the form of cast. Further step in empolyment of magnesium alloys will concern the sheet components. The objective of this paper is to report the results of laser beam keyhole welding of samples of alloys of MgAlZn group. With the...
Experimental results and a developed statistical model defining the effect of abrasive-grain size structure, hardness and concentration of microcrystalline alumina SG in ceramic grinding wheels on the value of Young's dynamic modulus E have been presented in this paper.
Results of the measurement of temperature distribution along the valve sterns manufactured by the use of various technologies (valves made with conventional methods by extrusion and bimetallic valves made according to the authors' idea, the cores of the valves being made of carbon steels) have been presented in the article. Research has been performed at the specially prepared stand. Simulations of...
On the basis of amplitude-frequency analysis roundness deviations for the wheel generated on gear shaper cutter are estimated. Main reasons of the occurence of cyclic deviations are described.
The paper reports the experimental investigation of the effect of electrical machining parameters (discharge current, pulse on-time) on the material removal rate, relative electrode wear and surface roughness during the electrical discharge machining of titanium alloy Ti-2Al-1.5Mn. The experimental results show that the better surface roughness is obtained, but material removal rate is relatively...
Improvement of the gear-boxes quality aimed at achieving lower noise, vibration and growth of durability is possible though gear teeth honing. The analysis included results of gear superfinishing after shaving and after milling under different tool rotational speed, tool pressure on the workpiece, honing and finishing time and by two angles of tool vs workiepiece axis turned. Results of the experiments...
In engineering applications, stereometric characteristics of rough surfaces are described using parameters of single profile, for example assuming that average height of profile vertexes is the same as everage height of profile vertexes of surface. These characteristics are often different, what causes non adequacy of such a form of surface description. Probability of fact, that vertex of surface...
Surface roughness by milling with cylindrical cutter and ball-end cutter is determined in technical literature, as so as in university textbooks, relatively very infrequently. The problem is usually simplified, so there are introducted simplified relations for calculations of theoretical surface roughness by milling with cylindrical cutters - calculation of parameter Rz - maximal highness of undulation...
The investigation is devoted to the thermal problems in dry orthogonal turning of a C45 medium carbon steel with natural contact tools treated with multilayer coatings with an intermediate Al2O3 layer. New hybrid analytical models for estimating heat partition to the chip and the tool-chip interface temperature are proposed. Furthermore, the physic-based modelling concept, which applies composite...
The paper concerns ultrasonic testing of butt welded joints, 3-7 mm in thickness, by means of single transducer angle probes. In the first part, the present state of the art in the field of ultrasonic testing of thin-walled elements is described. Special attention is given to troubles arising during propagation of ultrasonic waves in thin-walled welded joints. The second part deals with the methodic...
A methodology of estimating the fatigue limit of butt joints in 18G2A steel using the Basquin-Morrow equation is presented and the prediction approach is validated through comparisons with the fatigue test results. Three welding processes, namely the manual welding with covered electrodes (manual metal arc welding further referred to as MMA welding), the automated welding in an active gas shielding...
Comprehensive tests of spot resistance welding included a theoretical approach, computer simulation and laboratory verification. One- and two-dimensional simulation models were developed for the purpose of the tests. Physical properties of welded materials were experimentally determined for the purposes defined by the said simulation models (specific resistance, specific heat and heat conduction)...
Theoretical basis of gamma -> alpha transformation proceeding at the temperature below 700 degrees C has been presented. The course of investigation consisted in the recording of welding thermal cycles directly in the weld pool and weld, as well as the analysis of the influence of cooling times on the relative ferrite volume. The significance of gamma -> alpha transformation, proceeding at the...
The characteristics of a welding thermal cycle is presented as well as phenomena which occur in the HAZ during multi-pass welding. Examples of examination results aimed at the determination of HAZ properties in P91 steel by using the simulation technique are given and also some results of numerical modelling of thermal fields and cycles in the HAZ by means of ANSYS 5.6 programme.
Recording results of visual radiation intensity of the TIC welding arc have been presented. The correlation between welding parameters and the intensity of welding arc visual radiation has been examined. By using the TIC arc model described in the literature, a mathematical correlation between the welding current intensity, the welding arc length and the intensity of visual radiation of the arc has...
The investigations conducted at the Instytut Spawalnictwa in Gliwice into technology of laser welding of galvanized car body sheets, dissimilar in thickness, designed for tailored blanks, have been presented. It has been described the essential requirements imposed on the joints of this type. Different techniques of laser welding, such as dual beam laser welding and hybrid welding have been discussed.
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.