Abstract In the case of workpieces made difficult-to-cut materials, small-diameter holes (1 mm diameter below) can be obtained by means various nonconventional machining methods, one these being hybrid electrochemical discharge (ECDM). literature they researched, authors could not find enough information that would allow them to establish adequate work conditions for ECDM small using an electrolyte. The use a spring in order obtain motion required drill thin workpieces, and need remove...

The high yttria content of a stabilized zirconia (YSZ) (38 wt% Y2O3) coating was deposited by atmospheric plasma spraying (APS) from Metco 207 powders on an Inconel 718 (Ni-based superalloy) substrate. As metal connection, layer cermet powder (Ni-20% Al—410NS) used before the ceramic deposition. electro-chemical corrosion resistance these materials tested using cylinders with diameter 10 mm and thickness 1 mm, without layer. Linear cyclic measurements were obtained in H2SO4 electrolyte media...

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...

Ceramic coatings have many advantages for industrial and medical applications due to their exceptional properties. with a thickness of approximately 45 μm, after grinding, were grown using robotic arm that used the atmospheric plasma spraying procedure. The thermal shock stresses—a common situation in but difficult reproduce under laboratory conditions—of ceramic layers on top metal substrate was achieved solar energy focused by concentrating mirror, based experiments conducted CNRS-PROMES...

The development of mathematical models by using experimental data is great importance for modelling and optimization the laser cutting process. Motivated lack research regarding use genetic programming (GP) deriving empirical that describe process, present study discusses application GP to a kerf taper angle model. aim was quantify relationship between three selected input parameters (cutting speed, power assist gas pressure) in CO2 aluminium alloy AlMg3. To obtain database model evolution...

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 paper presents a high performance system for stepper motor control in microstepping mode, which was designed and performed with high-performed dedicated integrated circuits IXMS 150 PSI, made by IXYS SEMICONDUCTOR Company. improves the positioning accuracy eliminates low speed ripple resonance effects electrical drive. same is ideal robotics, printers, plotters, X-Y tables can facilitate construction of very sophisticated while significantly reducing component cost, board space design...

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...

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...

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,...

An usual material, EN-GJL-250 cast iron, used for automotive braking systems, was covered with a ceramic material (105NS-1 aluminium oxide) using an industrial deposition system (Sulzer Metco). The main reason to improve the corrosion and wear (friction) resistance properties of cast-iron. Samples were prepared by mechanical grinding sandblasting before deposition. We applied two four passes (around 12-15 µm layer) each at 90° obtaining coatings 30 respectively 60 µm. surface samples (with...

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...

Multi-objective optimization of laser cutting for simultaneous improvement performance characteristics is great practical importance. In this study a range value (ROV)-based Taguchi methodology proposed multi-objective cutting, i.e. surface roughness, kerf width and burr height in CO 2 AISI 304 stainless steel. Laser experiment was conducted based on Taguchi’s L 27 experimental design by varying the power, speed, assist gas pressure focus position at three levels. data signal to noise ratios...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Margareta Coteaţă, Hans‐Peter Schulze, Nicolae Pop, Irina Beşliu, Laurenţiu Slătineanu; Machinability of a Stainless Steel by Electrochemical Discharge Microdrilling. AIP Conference Proceedings 4 May 2011; 1353 (1): 1356–1360. https://doi.org/10.1063/1.3589705 Download citation file: Ris (Zotero) Reference...

The last decades highlighted the necessity of obtaining surfaces small dimensions in case some complex parts or workpieces made materials difficult to be cut by classical machining methods. In such cases, one methods able facilitate is electrical discharge machining. purpose followed research whose results are presented this paper was identify a solution for pulse generator which could incorporated and used equipment dimensions. analysis microelectrical process showed conditions necessary...

The paper aims to highlight the significance and place of information-seeking in finding improved solutions design innovative products. observation method was used identify a way increase efficiency searching for information needed when pursuing creative solution problem. study based on experience gained professional activities higher education industrial engineering classes held two academic subjects, students’ creativity stimulated, including search information. One conclusion is that an...

As other nonconventional machining methods, the electrical discharge is applied when workpieces materials are difficult to be machined by classical methods or surfaces could not obtained in efficient conditions methods. Such a situation appear, for example, test pieces must separated from whose difficult. Taking into consideration necessity detach cylindrical piece workpiece made of high resistance metallic alloy, problem using was formulated. An initial experimental common work motion tool...

The phonic pollution is a problem of interest in the mechanical workshops. Various solutions could be applied order to diminish intensity level sound generated by various noise sources. research presented this paper aimed highlight some aspects concerning measuring workshop and possibilities decreasing using fences made distinct materials. corresponding use universal lathe was experimentally measured means an adequate apparatus. results experimental were mathematically processed empirical...

There are various electrical discharge machining techniques and experimental researches could be necessary in order to establish the operating conditions for an optimal process. Some theoretical considerations concerning process of generating surface asperities as a consequence were elaborated. Experimental method was applied evaluate influence exerted by some input factors (pulse on time, pulse off average intensity electric current) certain roughness parameters ( Ra , Rz Ry Rq ). One...