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Paper presents the method of axes distance error compensation in convexo-concave Novikov gears. The method is based on the selection of pressure angle, which enables that after gear assembly, contact pattern will take the desired position and shape. Moreover the example of application of this method was given.
Heat treatment of elements with large and complex geometries generate distortions and strains inhomogeneity. Current paper focuses on material basic thermo-chemical parameters analysis in aim for prediction of AISI 9310 steel behaviour if it is about treatment of ring gears used conventionally for aircraft engine gear transmission system. Heat treatment process of heavily loaded aircraft engine transmission...
This study presents the algorithm for generating cross-correlated random variables. The algorithm uses the Cholesky decomposition. We discuss the advantages and disadvantages of the algorithm in terms of its application in the type B evaluation of measurement uncertainty. This study considered the determination of uncertainty in measuring the stiffness of machine tools for input variables suspected...
The paper investigates the influence of cutting parameters (vc, f, m) on the tool wear VBB during finish plunge hard turning of hardened 18CrMo4 steel with the use of Cubical Boron Nitride (CBN) inserts. The experimental research was conducted according to the Taguchi methodology. On the basis of the research results obtained, optimal values of cutting parameters were determined, for which the tool...
The effect of the amount of nanofiller and commercial flame retardant into the epoxy matrix on the mechanical properties of laminates reinforced carbon fabric was described. The total content of the fillers did not exceed 23 wt.%. The local strain and stress distribution on the surface of composites using the Aramis system during the static tension tests was examined. Studies of structure of cross-linked...
This paper presents the finite element method used to predict the properties of carrying systems in machine tools under the condition of variable configurations. Computational analyses used the hybrid models of the carrying system. Based on the analysis of the carrying system of a milling machine, this study analyzes and evaluates static stiffness distributions in its area of treatment.
The main objective of this work was to examine a solidification process of AlCu4Ni2Mg2 alloy and analyze morphology and composition of the complex microstructure of intermetallic phases in as-cast condition. To study the solidification process differential scanning calorimetry (DSC) was used. To identify intermetallics in AlCu4Ni2Mg2 alloy optical light microscopy (LM), X-ray diffraction (XRD), scanning...
Paper presents the method of axes distance error compensation in convexo-concave Novikov gears. The method is based on the selection of pressure angle, which enables that after gear assembly, contact pattern will take the desired position and shape. Moreover the example of application of this method was given.
The finite element method has been extensively used for the simulation of manufacturing processes and especially machining. In this paper, finite element models of high speed machining are presented. More specifically, orthogonal and oblique cutting models are presented, where the geometrical and material properties of the cutting tool are investigated. Orthogonal models pertain to the simulation...
In order to modify the non-flammable HIPS/ Mg(OH)2mixture, the admixture of a synergic system consisting of antimonium trioxide and hexacyclobromododecane was introduced. The purpose of the work was to find whether in such case, that is at the lower amount of the basic mineral flame retardant it would be possible to improve both mechanical and flame properties. Also the effect of introducing thermoplastic...
Any machine-tool or process designer by engineers is not as excellent as alive organisms, which manufactured the Nature in evolution process. Very intensive technology development encourages engineers for looking for new original solutions. Because of this fact engineers very often are looking for inspiration in natural surroundings. The bridge between solutions occurring in natural surroundings and...
The paper presents methodology of increasing the accuracy of models of gears made applying additive methods. As a part of activities related to this subject, it was necessary to develop 3D-CAD research gears, which were the basis for producing physical models made using incremental FDM manufacturing technology. The created models were verified in order to determine the accuracy of resulting geometry...
The article presents the results of experimental harmonic drive gear. An analysis of the accuracy of the rotary motion of the transmission was made. The analysis included determining the kinematic deviations in various measuring ranges. The study was conducted on a specially prepared test bench, on a physical model of a harmonic drive. The transmission has been designed, made and tested for the geometric...
Contemporary firms organize their activities in the form of extended enterprises. Extended enterprise is the concept that a company does not operate in isolation because its success is dependent upon a network of partner relationships established in the whole supply chain. These relationships are used for coordination of activities done by firms, every business partner focuses on specific area it...
This article presents the effect of the helical motion parameter, specific for the Duplex Helical method, on the obtained pinion tooth flanks and on the correctness of contact in a spiral bevel gear. Furthermore, the gear's sensitivity to assembly errors is demonstrated. The analyses are based on the designed mathematical model of cutting bevel teeth with a circular pitch line and the mathematical...
The article presents methodology of creating a model of human ear for the purposes of finite element analysis. Following steps of building geometry and mesh are shown. There is listed number of geometry variables which allows to fit the model to the individual anatomical characteristics connected with hearing system. Model created enables application various types of hearing implants as well as investigation...
In the paper the dwell fatigue behaviour of two-phase Ti-6Al-2Mo-2Cr alloy (VT3-1) at elevated temperature was investigated. The reasons of high sensitivity of titanium alloys to dwell periods at high stress level during cyclic loading were summarized. The relations between morphology of the alloy microstructure and the effect of dwell periods at peak stress was established. The microstructure of...
Modern methods of design and manufacture of gears are based on Computer Aided Engineering Systems. This article presents one of the methods to analyze the accuracy of mapping geometry of the model of driving wheel of gear pump designed in CATIA v5 System. Comparison of the accuracy of mapping of the geometry of the hybrid model has been performed with the source model of gear (model .stl format).
The commercial Ni-base superalloy Rene 80 was isothermally oxidized at 1050°C in synthetic air and synthetic air with addition of H2O in two types of experiments: during oxidation in a thermobalance for 50 h and during oxidation in a tube furnace. During thermobalance oxidation the water vapour content was 7% while during tube furnace oxidation 20%. The samples were exposed up to 100 hours. The obtained...
The paper presents the evaluation of the quality and adherence of rhodium layers deposited on the nickel substrate. Rhodium layers (0.2 and 0.5 mm thick) were deposited by the electroplating method on the surface of the nickel substrate. The scratch test method (REVETEST R) was applied to determine the adhesion of layers. The increase of test force from 0.9 to 5 N and from 0.9 to 10 N did not lead...
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