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Search Results: 1 - 10 of 189846 matches for " G. Budzik "
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Possibilities of utilizing 3DP technology for foundry mould making
G. Budzik
Archives of Foundry Engineering , 2007,
Abstract: Possibilities of application of three-dimensional printing (3DP) technology for making casting prototypes are discussed. Three-dimensional printing enables making of foundry moulds for elements of complex shapes. The mould presented in the paper was printed with the use of Z510 Spectrum unit in the Car Technology Sp. z o.o. (Ltd. Co.) in Kraków. The basic material for printing foundry moulds is the ZCast 501 powder. This powder is a mixture of traditional molding sand, gypsum and supplementary ingredients. The mould is made in ZCast technology, and it enables casting of zinc, magnesium and aluminum alloys at max. pouring temperature of 1100°C. The paper describes research on the possibility to utilize a standard ZP14 powder for building a rotor blade casting moulds. The research has showed that the ZP14 powder may serve for printing foundry moulds, which should then be subjected to thermo-chemical treatment. Application of the basic ZPrint system powder permits a reduction in mould manufacturing costs.
Properties of made by different methods of RP impeller foundry patterns
G. Budzik
Archives of Foundry Engineering , 2007,
Abstract: This article presents the tests of properties of foundry patterns of turbocharger turbine impeller. Impellers prototypes were predestinated for casting by method losing patterns. There were carried out tests of these prototypes made by different methods of Rapid Prototyping (RP). Two impeller were made by growth methods: stereolitography (SLA) and three dimensional printing (3DP). One prototype was made by the method of Vacuum Casting as a wax casting. Tests were executed in the Department of Machine Design of Rzeszow University of Technology in cooperation with WSK PZL Rzeszow and Car Technology Krakow. First impeller was carried out by method of stereolitography on SLA 250 plant. That pattern was also used to carry out silicon matrix for casting of wax pattern. Next pattern was printed by three dimensional printer Z510 from the powder ZP14. Good removability of the pattern from the mould is particularly essential for impellers of small turbines with blades of small thickness of their section. All pattern were tested on their removability from the ceramic mould. The best melting properties had the wax pattern. Patterns made from resin SL5170 (SLA) and powder ZP14 (3DP) were removed in the process of burning but about 1% of soot was left in the mould.
The analysis of the possibility of the application of the casting waxes in the process RP
G. Budzik
Archives of Foundry Engineering , 2009,
Abstract: The article presents analysis of possibility of application of casting waxes in process of rapid prototyping of casting models in silicone the matrices. The researches were made on casting waxes applied to the manufacturing of precise casting models and also the model system. Testing waxes are intended nominally to the processing in process of the injection. The determining of possibility processing of waxes in silicone forms was purpose of researches. Researches concerned of whole manufacturing process i.e. the preparation of the form and wax, the filling of form and also the deforming. As a result of made researches the temperature of filling of matrix was determined. The main part of research process concerned determining of temperature of deforming for every with kinds of waxes. This is especially important in case of manufacturing of casting models of precise elements, which can be destroyed easily. In this purpose researches of the bending of waxen forms were made in the range of temperature 20-37oC. The processing parameters of casting waxes were determined as a result of made researches.
Geometric accuracy of wax bade models manufactured in silicon moulds
G. Budzik,H. Matysiak
Archives of Foundry Engineering , 2010,
Abstract: The article presents the test results of the geometric accuracy of wax blade models manufactured in silicon moulds in the Rapid Tooling process, with the application of the Vacuum Casting technology. In batch production casting waxes are designed for the manufacture of models and components of model sets through injection into a metal die. The objective of the tests was to determine the possibility of using traditional wax for the production of casting models in the rapid prototyping process. Blade models made of five types of casting wax were measured. The definition of the geometric accuracy of wax blade models makes it possible to introduce individual modifications aimed at improving their shape in order to increase the dimensional accuracy of blade models manufactured in the rapid prototyping process.
Hybrid foundry patterns of bevel gears
Budzik G.,Markowski T.,Sobolak M.
Archives of Foundry Engineering , 2007,
Abstract: Possibilities of making hybrid foundry patterns of bevel gears for investment casting process are presented. Rapid prototyping of gears with complex tooth forms is possible with the use of modern methods. One of such methods is the stereo-lithography, where a pattern is obtained as a result of resin curing with laser beam. Patterns of that type are applicable in precision casting. Removing of stereo-lithographic pattern from foundry mould requires use of high temperatures. Resin burning would generate significant amounts of harmful gases. In case of a solid stereo-lithographic pattern, the pressure created during gas burning may cause the mould to crack. A gas volume reduction may be achieved by using patterns of honeycomb structure. However, this technique causes a significant worsening of accuracy of stereo-lithographic patterns in respect of their dimensions and shape. In cooperation with WSK PZL Rzeszów, the Machine Design Department of Rzeszow University of Technology carried out research on the design of hybrid stereo-lithographic patterns. Hybrid pattern consists of a section made by stereo-lithographic process and a section made of casting wax. The latter material is used for stereo-lithographic pattern filling and for mould gating system. The hybrid pattern process consists of two stages: wax melting and then the burn-out of stereolithographic pattern. Use of hybrid patterns reduces the costs of production of stereolithographic patterns. High dimensional accuracy remains preserved in this process.
The influence of changes of combustion gas temperature during flow around the horizontal cylinder on local Nu number
M. Górska,L. Szecówka,R. Budzik
Metalurgija , 2009,
Abstract: The article the influence of changes of combustion gas temperature during flow around of horizontal cylinder on local Nu number was presented. In order to test an influence of effect waste gas temperature cycle of experimental investigations were conducted. Experimental tests were carried out on a properly designed measuring cylinder furnished with a number of thermocouples embedded along the cylinder perimeter. The cylinder was made from stainless steel of known thermal conductivity, and was cooled on the outer side through a water cooling system. The cylinder was placed horizontally in a heating chamber equipped with an axially positioned gas burner fired with natural gas. Gas and air feeds were regulated with control valves, based on combustion gas analyzer data.
The analysis of the wax foundry models fabrication process for the CPX3000 device
G. Budzik,B. Kozik,J. Bernaczek,M. Wieczorowski
Archives of Foundry Engineering , 2011,
Abstract: The paper presents possibilities of creating wax founding models by means of CPX3000 device. The device is used for Rapid Prototypingof models made of foundry wax in an incremental process. The paper also presents problems connected with choosing technologicalparameters for incremental shaping which influence the accuracy of created models. Issues connected with post-processing are alsodescribed. This process is of great importance for obtaining geometrically correct models. The analysis of parameters of cleaning models from supporting material is also presented. At present CPX3000 printer is the first used in Poland device by 3D Systems firm for creating wax models. The printer is at The Faculty of Mechanical Engineering at Rzeszów University of Technology.
Accuracy of the photogrametric measuring system for large size elements
M. Grzelka,G. Budzik,L. Marciniak,B. Gapiński
Archives of Foundry Engineering , 2011,
Abstract: The aim of this paper is to present methods of estimating and guidelines for verifying the accuracy of optical photogrammetric measuringsystems, using for measurement of large size elements. Measuring systems applied to measure workpieces of a large size which oftenreach more than 10000mm require use of appropriate standards. Those standards provided by the manufacturer of photogrammetricsystems are certified and are inspected annually. To make sure that these systems work properly there was developed a special standardVDI / VDE 2634, "Optical 3D measuring systems. Imaging systems with point - by - point probing. " According to recommendationsdescribed in this standard research on accuracy of photogrametric measuring system was conducted using K class gauge blocks dedicatedto calibrate and test accuracy of classic CMMs. The paper presents results of research of estimation the actual error of indication for sizemeasurement MPEE for photogrammetric coordinate measuring system TRITOP.
Rapid Prototyping of wax foundry models in an incremental process
B. Kozik,G. Budzik,T. Dziubek,M. Grzelka
Archives of Foundry Engineering , 2011,
Abstract: The paper presents an analysis incremental methods of creating wax founding models. There are two methods of Rapid Prototypingof wax models in an incremental process which are more and more often used in industrial practice and in scientific research.Applying Rapid Prototyping methods in the process of making casts allows for acceleration of work on preparing prototypes. It isespecially important in case of element having complicated shapes. The time of making a wax model depending on the size and the appliedRP method may vary from several to a few dozen hours.
The use of optical scanning for analysis of casting shape
M. Wieczorowski,M. Grzelka,G. Budzik,J. Augustyn-Pieniazek
Archives of Foundry Engineering , 2011,
Abstract: In the paper the use of optical scanning for inspection of casting shape and its accuracy was described. Optical system applied todigitization of objects determines all dimensions and shape of inspected object. This technology is used in quality control and reverse engineering. System is based on triangulation: sensor head performs projection of different patterns of fringes onto measured object and scanner tracks their distribution with two cameras. Basing on optical transform equations, a processing unit automatically and with remarkable accuracy calculates 3D coordinates for every pixel of camera. Depending on camera resolution the result of such a scan is acloud of points with up to 5 million points for every image. In the paper examples of applications for castings with different designationwas presented.
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