Adam Ruszaj - Academia.edu (original) (raw)

Papers by Adam Ruszaj

W przemysłowych procesach technologicznych nowych wyrobów coraz częściej wykorzystywane są metody... more W przemysłowych procesach technologicznych nowych wyrobów coraz częściej wykorzystywane są metody RP (szybkie prototypowanie), a wśród nich selektywne spiekanie (SLS). Technologia SLS znajduje coraz szersze zastosowanie do produkcji elementów dla przemysłu samochodowego, lotniczego, telekomunikacji, mechaniki precyzyjnej, urządzeń i implantów medycznych oraz wielu innych. Jako materiały do spiekania stosowane są proszki metali, stopów metali, ceramiki oraz kompozytów. W artykule zaprezentowano możliwości technologiczne urządzenia (jedynego w Polsce) do selektywnego spiekania laserowego EOSINT M 250Xt znajdującego się w laboratorium Instytutu Zaawansowanych Technologii Produkcyjnych (IZTW) w Krakowie.

Machining of Complex Sculptured Surfaces, 2012

Wear, 1991

Electrochemical machining (ECM) is a random process; the two basic parameters of ECM technology, ... more Electrochemical machining (ECM) is a random process; the two basic parameters of ECM technology, i.e. the interelectrode gap s and the surface roughness R., are submitted to random variations. The scatters of s and R, exert a sign&ant influence on the functional properties of workpieces produced by ECM. This report presents results of theoretical and experimental investigations performed to establish the influence of the process parameters and phenomena occurring withii the machining area on s and R, and their standard deviations oS and uR.. Deductive and statistical models of this process for a flat rectangular electrode are elaborated. From these models it is concluded that random fluctuations of electrochemical sinking parameters, together with internal perturbations occurring in the working zone, exert a significant influence on the mean values and standard deviations of s and R,. To increase machining accuracy, one should (a) stabilize the input parameters of the process, (b) select the process parameters to attain minimum values of s, uS, R. and uR1, and (c) limit the influence of local random changes in K, &, 77 and AU,, resulting from internal perturbations of the process, on a, and uR, (where K is the electrolyte-specific electrical conductivity, k, is the electrochemical vohrmic equivalent of anode material, and AU, is the voltage drop in the electrolyte films adjacent to the electrode and workpiece).

Precision Engineering, 1992

In electrodischarge machining, the material excess is removed as a result of complex mass, heat, ... more In electrodischarge machining, the material excess is removed as a result of complex mass, heat, and electric charge transport processes, which have a random and often unstable character. Investigations on classical electrodischarge sinking have shown that within steady-state process parameters, the standard deviation of the workpiece dimensions (a measure of accuracy) decreases with the decrease of the machined area. It is possible to take advantage of this fact by using an electrode with a working area smaller than the machined area and different electrode kinematics than in classical sinking. This assumption was corroborated by investigations on electrodischarge sinking machine by means of a flat and a segmental rotating electrode as well as by means of an electrode moving above the machined surface.

Management and Production Engineering Review, 2016

The International Journal of Advanced Manufacturing Technology, 2016

One of the ways to improve technological factors in electrochemical machining is introduction of ... more One of the ways to improve technological factors in electrochemical machining is introduction of electrode tool ultrasonic vibrations. Ultrasonic vibrations change condition of electrochemical dissolution and gives possibility to decrease the electrode polarisation, therefore it can be promisingly applied in case of titanium alloys machining. In the paper research on Ti-6Al-4V alloy PECM supported by ultrasonic vibrations has been presented.

W przemysłowych procesach technologicznych nowych wyrobów coraz częściej wykorzystywane są metody... more W przemysłowych procesach technologicznych nowych wyrobów coraz częściej wykorzystywane są metody RP (szybkie prototypowanie), a wśród nich selektywne spiekanie (SLS). Technologia SLS znajduje coraz szersze zastosowanie do produkcji elementów dla przemysłu samochodowego, lotniczego, telekomunikacji, mechaniki precyzyjnej, urządzeń i implantów medycznych oraz wielu innych. Jako materiały do spiekania stosowane są proszki metali, stopów metali, ceramiki oraz kompozytów. W artykule zaprezentowano możliwości technologiczne urządzenia (jedynego w Polsce) do selektywnego spiekania laserowego EOSINT M 250Xt znajdującego się w laboratorium Instytutu Zaawansowanych Technologii Produkcyjnych (IZTW) w Krakowie.

Machining of Complex Sculptured Surfaces, 2012

Wear, 1991

Electrochemical machining (ECM) is a random process; the two basic parameters of ECM technology, ... more Electrochemical machining (ECM) is a random process; the two basic parameters of ECM technology, i.e. the interelectrode gap s and the surface roughness R., are submitted to random variations. The scatters of s and R, exert a sign&ant influence on the functional properties of workpieces produced by ECM. This report presents results of theoretical and experimental investigations performed to establish the influence of the process parameters and phenomena occurring withii the machining area on s and R, and their standard deviations oS and uR.. Deductive and statistical models of this process for a flat rectangular electrode are elaborated. From these models it is concluded that random fluctuations of electrochemical sinking parameters, together with internal perturbations occurring in the working zone, exert a significant influence on the mean values and standard deviations of s and R,. To increase machining accuracy, one should (a) stabilize the input parameters of the process, (b) select the process parameters to attain minimum values of s, uS, R. and uR1, and (c) limit the influence of local random changes in K, &, 77 and AU,, resulting from internal perturbations of the process, on a, and uR, (where K is the electrolyte-specific electrical conductivity, k, is the electrochemical vohrmic equivalent of anode material, and AU, is the voltage drop in the electrolyte films adjacent to the electrode and workpiece).

Precision Engineering, 1992

In electrodischarge machining, the material excess is removed as a result of complex mass, heat, ... more In electrodischarge machining, the material excess is removed as a result of complex mass, heat, and electric charge transport processes, which have a random and often unstable character. Investigations on classical electrodischarge sinking have shown that within steady-state process parameters, the standard deviation of the workpiece dimensions (a measure of accuracy) decreases with the decrease of the machined area. It is possible to take advantage of this fact by using an electrode with a working area smaller than the machined area and different electrode kinematics than in classical sinking. This assumption was corroborated by investigations on electrodischarge sinking machine by means of a flat and a segmental rotating electrode as well as by means of an electrode moving above the machined surface.

Management and Production Engineering Review, 2016

The International Journal of Advanced Manufacturing Technology, 2016

One of the ways to improve technological factors in electrochemical machining is introduction of ... more One of the ways to improve technological factors in electrochemical machining is introduction of electrode tool ultrasonic vibrations. Ultrasonic vibrations change condition of electrochemical dissolution and gives possibility to decrease the electrode polarisation, therefore it can be promisingly applied in case of titanium alloys machining. In the paper research on Ti-6Al-4V alloy PECM supported by ultrasonic vibrations has been presented.