Wire electrical discharge machining has appeared mainly in response to the need for detachment with sufficiently high accuracy of parts plate-type workpieces. The improvements introduced later allowed extension this technology obtain more complex ruled surfaces increasingly requirements regarding quality machined and productivity wire process. Therefore, it was normal researchers be interested developing in-depth investigations into various aspects machining. These studies focused first on...

The thermal properties of parts obtained by 3D printing from polymeric materials may be interesting in certain practical situations. One these is the ability a material to expand as temperature rises or shrink when drops. A test experiment device was designed based on expansion negative spiral samples, made investigate behavior some terms contraction. sample placed an aluminum alloy plate groove. finite element modeling highlighted possibility that areas and have different temperatures,...

Cylindrical clearance joints are commonly employed in mechanisms that involve the rotation of a shaft spindle within cylindrical sliding bearing. The intensity friction process such is governed by several factors, including size between components, materials interacting surfaces, properties and characteristics lubricant, surface roughness (asperities), magnitude relative velocity joint’s components. To experimentally determine coefficient joints, custom device was designed implemented. This...

It is known that ceramic–polymer composite materials can be used to manufacture spherical bodies in the category of balls. Since balls are frequently subjected compression loads, paper presents some research results on behavior made ceramic with a polymer matrix. The mathematical model pressure variation inside highlights existence maximum values areas contact other parts. Experimental was carried out diameter 20 mm, manufactured by 3D printing from four matrix: pottery clay, terracotta,...

The Moodle platform, which was proposed and initially developed by Martin Dougiamas, improves the didactic process helping professors to generate publish online content. This enables more intense interaction collaboration during design of educational curricula. use platforms is continuously increasing platform itself under continuous development. improvement correspond a therefore can be analyzed using axiomatic principles. In this paper, customer needs were taken into consideration,...

The current paper demonstrates the digital recreation and 3D printing of a missing fragment an ancient ceramic pottery following digitization using three dimensional laser scanning. resulting pointcloud scans was treated with series advanced software for creation surfaces ultimately model. An analytical methodology is presented revealing step by approach, which innovative way recreating fragment. Such approach aims to demonstrate level contribution that ever evolving computer based...

Hybrid electrochemical discharge machining is a method materialized by distinct techniques which combines effects of material removal specific to and electrical machining. The research presented in this paper aimed design, build test an in-house equipment for hybrid study the drilling using rotating tool passivating electrolyte. Theoretical conditions obtaining small diameter holes were investigated. One considered that aqueous solution soluble sodium silicate would behave as In order break...

The ball vibroburnishing process of external cylindrical surfaces involves workpiece rotation, while a is being pressed and forced to roll on the surface, simultaneously, achieving an axial vibration. Experimental research was designed in accordance with principles full factorial experiment six independent variables at two levels test pieces made distinct steels, medium-carbon steel 1C45 low-carbon alloy 18CrMn4-4. frequency amplitude vibration motion, diameter, radial rolling force,...

Wire electrical discharge machining (WEDM) is a process that used when it necessary to manufacture small-width slots with micrometer accuracy or precisely detach parts complex contours from metal workpieces in the form of sheets plates. The fact wire electrode rests only working zone two its guides allows achieve micrometric oscillations, leading generation an error flat shape slot surfaces gradually develops into workpiece. widths are influenced by several factors, such as workpiece...

Electrical discharges can be used to improve the operational properties of surface layer parts by using phenomena tempering, alloying, and deposition. Various techniques alloying or deposition have been studied so far sometimes even applied in industry. The systemic approach process shows which input output factors taken into consideration. This article presents experimental results obtained based on introduction additional material such as powders put directly plasma channel corresponding...

Complex surfaces such as helical ones are commonly used in machinery. Such can be obtained by various machining processes, one of these processes being thread whirling. The influence conditions needs to better understood develop a more precise prediction the specific resulting errors involved This paper firstly presents theoretical which generate micro-deviations on whirled surfaces. A model considers geometrical parameters describing whirling head and cutters process’s whole kinematics was...

The strength of a joint between the ends one or more strips can be improved by making contours into shape either Greek letter omega dovetail. From point view industrial practice, it is interest to study behavior these joints under stretching demands. emergence and development additive manufacturing processes for parts made polymeric materials has led idea conducting experimental tests highlight dovetail-type during tensile test. For testing some test samples in which dovetail were used,...

When the threads are obtained by using turning tools, various factors able to affect machining accuracy. In order reveal way in which these exert influence on threading accuracy, an analysis of some proper situations obtaining universal lathes and tools was developed. The showed that thread profile error could be essentially affected position cutting tool active edges relative workpiece. Taking into consideration results analysis, aspects concerning requirements met during design a device...

Smart grids are energy networks that can monitor flows providing to consumers and suppliers information on real-time consumption. The EU intends replace at least 80% of electricity meters with smart by 2020. Meter data management (MDM) is a critical component realizing the potential infrastructure facilitates distribution meter across utility enterprise consolidating reading from multiple collection systems into one MDM. Most systems, market, integrate calculate billing determinates do...

The wire electrical discharge machining is based on the developing discharges between a travelling tool electrode and plate workpiece, in order to detach parts characterized by machined ruler surfaces. practical experience study of specialty literature highlighted possibilities improve material removal rate acting electrode. Two versions devices able periodically change traveling motion speed are discussed proposed; could be included circuit guiding machine.

Ionanofluids are a very new class of nanofluids having ionic liquids as the base fluid. Thermophysical properties (ILs) and nanoparticle enhanced (NEILs) part studying fluids for heat transfer. NEILs formed by dispersing different volume fractions nanoparticles in liquid. In this article, only thermal conductivity enhancement was considered comparison ionanofluids. show compared to ILs. Maximum observed adding 1 % MWCNT [C4mim][(CF3SO2)2N] However, if 0.05% added [(C6)3PC14)][NTf2] no noticed.

The form of the outer and inner surfaces hollow spherical parts determines developments some particular categories efforts during compression tests. overall purpose research presented in this paper was to study behaviour under axial compression. PLA were obtained by 3D printing using distinct values for certain process input factors. finite element method used theoretically investigate it highlighted total plastic deformation test pieces. To experimentally verify theoretical considerations,...

Different processing methods can change the physical-mechanical properties and microgeometry of surfaces made by such processes. In turn, microchanges may affect tribological characteristics surface layer. The purpose this research was to study behavior a test piece analyzing changes on values coefficient friction loss mass that appear in time. subjected experimental were previously obtained turning, grinding, ball burnishing, vibroburnishing. performed using device adaptable universal...

Over the years, importance of creativity inclusively in field design activities was highlighted. In accordance with opinions certain researchers, divergent thinking could contribute to increase creative processes efficiency. On other hand, axiomatic method is considered as a able stimulate technical when problem designing mechanical equipment stated. To efficiency using method, possibility selecting most convenient solution among many available solutions be discussed. The analysis revealed...

One of the machining methods able to ensure a high material removal rate in case obtaining threaded surfaces is whirling machining. In order obtain accuracy machined surface and low values irregularities, an adequate selection parameters necessary. A geometrical analysis generating applying whirl threading was developed. Geometrical kinematical conditions were considered software used modelling process highlight influence exerted by some input factors on errors height irregularities.