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This paper contains the description of conventional roll modification mechanism used for spiral bevel gears generation and presents several possible solutions for the implementation of this mechanism using mathematical equations. Accuracy of each method has been compared with respect to nominal values, and mathematical derivation has been discussed. Possible practical application in numerical machine...
Article presents method of construction of special milling tool created for obtaining particular cutting forces system during usage of such tool. Developed machine tool solution can direct forces in direction that is significantly less flexible than other or in direction in which deformations will not effect significantly deviations in machined part. The method presented here combine aspect of the...
In this paper, a method for estimation of cutting force model coefficients is proposed. The method makes use of regularized total least squares to identify the cutting forces from the measured acceleration signals and the frequency response function (FRF) matrix. An original regularization method is proposed which is based on the relationship between the harmonic components of the cutting forces....
The use of the radio controlled network system in industrial tasks is a real fact. The new medium, according to its nature and characteristics improves new possibilities in the data transfer. The paper illuminates some basic problems concerning the wireless communication systems. Attributes and limitation are simply presented. Some rules and recommendations are formulated and elaborated. Three popular...
Packaging made of polymeric materials is one of the most important branches of polymer processing. A very essential task which is to be solved in this area, is searching for new materials which would allow for lowering the cost while still maintaining good mechanical properties. In the current paper the attempt to decrease the cost of the HDPE intended for blow moulding of packaging by admixing CaCO3...
This work deals with investigation of residual stresses during by non-destructive methods turning. Workpiece material, which was used in experiments was 19 830 steel, which is used for rolling bearing rings. Residual stress were observed in the application of various cutting parameters by non-destructive methods.
The article is an attempt to analyse matrix recording of the graph to find on assembly sequence. There has been presented the use of matrix of graphs and assembly states to model and find the assembly sequence, there has also been done short comparison of their most essential features. It has been proved, that appropriate matrix representation of the assembly unit, which is the basis of modern computer...
The effect of rotational and travelling speeds and down force on the torque in Friction Stir Processing (FSP) process is presented. The relationship between rotational speed and torque was modelled by an exponential function. The dependence of the travelling speed and down force affecting the torque was successfully approximated by linear functions. To find a dependence combining the spindle torque...
In the paper modelling and calculations of an asymmetrical bolted flange connection at the operational stage are presented. The physical model of the joint is based on a flexible flange element that is connected with a rigid support by means of hybrid elements, which substitute bolts. Between the flange element and the support, the nonlinear Winkler model of a contact layer is taken into consideration...
In this paper a series discussing the possibility of analytical evaluation of the uncertainty of coordinate measurements is presented. It presents models of evaluation of uncertainty of some geometric deviations (such as flatness, perpendicularity of axes, position of point, axis and plane) based on the formula for the point-plane distance. An important element of the presented methodology for determining...
This paper presents a new approach to modeling geometric errors in machine tools with linear rolling guideways. Modeling was performed using a finite element method. The results of the modeling were a visualization of deformations of a virtual milling machine with a cross table and with known characteristics of guide geometric errors. The simulation results show that the machine table is subject to...
Processes in a cutting zone are so complicated and dynamic, that their description is performed by specifically created models. As the models have faults and deviations, it is necessary to improve them so that these deviations become as little as possible or completely abolished and focus on the area of micro-cutting. Examining new ways should be based on the previous research and it is necessary...
Not all kinds of polymeric composites which are not traditional GRPs deserve to be called nanocomposites. In this paper, among others, this question is discussed, based on the structure of the most popular nanofiller called montmorillonite, which is extracted from a certain kind of clay. It is shown what factors determine obtaining a material which can be regarded as a nanocomposite and when it is...
The article describes application of reverse engineering techniques for modeling the appearance and the planning of correction of mandibular prognathism and FEM numerical analysis process components designed to perform anastomoses condylar fracture.
The article presents individual approach discussion and results of measurements of accuracy of parts built using Selective Laser Melting (SLM) of metal powder. One of the reasons of research was checking the influence of distance from centre of base plate, as well as caused by this phenomena spot deviation on model accuracy. Deformation and deviations of geometry of thin walls was observed and reported...
The paper presents the problem of determining the prioritisation of production orders. The proposed criterion function allows a comprehensive evaluation of various ways of prioritising taking into account both the income derived from the execution of production orders and the penalty for any delays which may occur. The criterion function was implemented in an algorithm based on the operation of a...
Physical and mechanical properties of ceramic materials make them useful applications in both mechanical and medical engineering. This paper presents the technological system for precision machining of super hard ceramic materials. As an example of precisely processed ceramic components a circular / spherical element can be given, which was used in an endoprosthesis hip replacement. This paper presents...
The influence of grinding conditions on surface texture of sintered FeGr1.2 metal matrix composites infiltrated by copper based alloys such as CuSn5 and CuSn5Pb2.5 is considered. The composition of MMC and parameters of grinding practically do not influence the texture of the treated surface after grinding using with white Al2O3wheel. Conditions of sparking out have the decisive influence on the results...
This paper provides a new method for an elasto-plastic analysis of stress and deformation fields in the composite overwrapped cylinder under the pressure load. The cylinder structure consisting of steel liner and composite shell was examined. The non-linear properties of the steel tube, and orthotropic properties of the composite were assumed in this analysis. The compound cylinder was checked against...
This paper discusses generation of lattice structures with non-uniform shape and their optimization in a computer aided design (CAD) model of an exemplary part. Feasibility of encapsulating the whole process within one off-the-shelf CAD suite is analyzed. A method of design of lattice structures of variable density is proposed. A series of finite element method (FEM) analyses leading to achieving...
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