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The method of numerical modelling of thermomechanical processes in weld surfacing of cylindrical elements based on body growth theory, Bodner-Partom's model and finite elements method is presented. There are given the results of calculations of residual stresses and strains for a 25CrMo4 steel roller built-up with X10CrNi18-8 steel weld metal deposit, in two layers. The calculation results were compared...
In the paper a mathematical and numerical model of two-dimensional electrolyte flow in an interelectrode gap has been presented. In this paper there has been formulated an equation of shape evolution of electromachined curvilinear surface as well as an equation of electrolyte and gas mixture flow in the gap between curvilinear surfaces. Variable in time properties of the electrolyte have been determined...
In the paper the analysis of the measurement line for the position and the velocity of the hydraulic press crossbar measurement with the use of the photoelectric transducer has been performed in order to show essential parameters of the measurement line, influencing the measurement accuracy. A measurement line, where mechanical coupling between the measured mechanism and the measurement transducer...
Non-conventional approaches of process structure generating are presented in this paper. The point of departure in the method presented is a set of raster patterns of features and more specifically a binary bitmap of machining allowance. The aim is the construction of a method of classifying the machined forms on the basis of their shape, to one of the groups of a known machining operation structure...
The new method of surface roughness modeling with one effective radius was proposed in the work. The method enables to describe the real surface with isotropic structure as well as mixed and anisotropic one. The presented method is based on the analysis of size and shape of the elementary surface intersection spots with planes parallel to the mean plane.
The manual engraving based on the photography is often used as a manufacturing method in production e.g. coins or quasi-three-dimensional souvenirs. Unfortunately, this method requires high artistic skills from the engraver, it is very labour absorbing, that means this method is very expensive. The two reverse engineering methods for resolving above problems are presented in the paper. First method...
Summary This paper presents the influence of the regression method on the mathematical model of roller burnishing operation with electrocontacted heating. The forward, backward and stepwise regression along with the statistical analysis of the resulting regression equations is presented. The following indices have been proposed for evaluation of accuracy of operation's model: ratio of calculation...
The article describes an intermediary method of off-line error correction in the process of free surface patch processing with numerical control milling machines. The authors present and discuss the results of examining the effectiveness of the suggested method. The research was carried out with the use of a CNC FYS 16N milling machine, the CAD/CAM Mastercam system as well as a Renishaw JPC 11 contact...
The paper presents a modelling method of Flexible Assembly Systems by means of modified Coloured Object Observable Petri Nets. Proposed method aims at building a modular model (each object of the system is modelled by a separate module), which may be used in simulation and distributed control. Model modules are integrated by means of joined transitions, so that the whole model defines the structure...
One of the most important step in the creating new gauge is elaborating and verification his model of uncertainty. The uncertainty model of gauges based on laser interferometer with translatorial-kinematic is presented in this document. This kind of artifacts can be a solution for problems of verification of large CMM based on the measuring length control methods. The most important source of errors...
The paper presents the two stage approach to the feature recognition for CAPP (Computer Aided Process Planning) system. After the presentation of the basic information about the manufacturing features, the definition and the methods of feature acquisition, including the advantages and disadvantages of the particular methods, the analysis of the information flow in process planned-rented product modeling...
In the paper there is presented the own method identification of form of biobearings working surfaces and of geometrical estimation of the articulation cartilage defects imaged using magnetic nuclear resonance. There were examined three animal and three human specimen knees using computer tomography (CD, magnetic resonance (MR) and coordinate control machine (CCM). The joint cartilage was artificial...
The paper presents the results of modelling of the cutting edge vibrations influence, on the chip formation process. The temperature and Von Mises stresses distributions on the rake face for two cutting speeds (low and high) and different values of frequencies vibrations at the constant amplitude were defined in the simulation researches. Additionally, the cutting force courses (main and feed cutting...
It is possible and worth of interests using of industrial robots to a measurement tasks in the field of multicoordinate metrology. During adaptation process it is important to perform of accuracy analyzing built measurement system. In the case of coming into being lack of accuracy it is Indispensable to correct this values. The use of software methods like ANN (Artificial Neural Networks) it seems...
The paper presents the comparison of measured and simulated values of cutting force component during milling of a hot-work tool steel (applied for dies and moulds). Workpiece was made in the form of plate, screwed to the piezo-electric dynamometer. The cutting mill with solid carbide insert was used during tests. The results of experiments and calculations were compared.
The laser scanners for reverse engineering applications are very expensive, usually. It is result of the accuracy (about 0.1 mm) and scanner's speed (thousands scans per second). The some problems in the reverse engineering do not require this accuracy and speed; e.g. the reconstruction of some artistic models needs the accuracy of 1 mm and the scanning speed is not critical. The paper describes the...
This paper describes the ability of the inverse geometrical accuracy solution of industrial robot manipulator, to make the example of its planar carrying part and anthropomorphic arm configuration. The manipulator accuracy analysis - realizes by means of Toleranced Dimensions Methods - depends on the: formulization the direct (or inverse) analysis problem, build up and resolve its dimensional chains...
Powder mixed electrical discharge machining (PM-EDM) is a new manufacturing technology developed in recently years. The factors, which influence the surface roughness generated in EDM process with powders suspended dielectric fluid, are pulse on time, discharge current and powder concentration, etc. Based on the machining mechanism, the mathematical model to represent machined surface roughness is...
The flexible grinding tools with polyurethane bonds create the distinct group of grinding tools from their specific properties. This properties cause that the vertical displacement of grinding grains can obtain one millimeter values in the polishing process of flat surfaces. This article presents the methodology of experimental research the contact deflections of individual grinding grains which are...
Tool wear estimation during cutting is the main need in automatic manufacturing systems. In the paper there has been presented tool wear estimation method based on a digital image of a machined surface. Digital image of a machined surface was analysed with the use of Digital Wavelet Transform. There has been performed decomposition of the image and mathematical indexes of chosen wavelet decomposition...
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