Measurement equipment for investigation of the influence of viscosity of dielectric working fluids on spark erosion

Schulze, H.‐P.; Wollenberg, G.; Lauter, M.; Storr, M.; Rehbein, W.

doi:10.1109/tdei.2003.1255776

Cited by 11 publications

(5 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the help of the video recordings only the expansion of the gas bubble can be determined with sufficient accuracy. The propagation of the plasma channel is much faster and also often results in a constancy of the system, which has already been detected by HSFC recordings [3].…”

Section: Collapse Of the Gas Bubblementioning

confidence: 64%

“…The only question is which can be determined according to the final diameter of the plasma channel, the reference to the crater (single pulse) [1], [2]. More accurate simulations take into account expansion of the plasma channel, the enthalpy and heat capacity of the electrode materials and consideration of the working medium and the pressure dependence (gas bubble expansion) of the physical parameters [3], [4]. Under given experimental conditions, the individual discharges can also be measured under actual conditions of contamination [5].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Plasma Channel Change on the Surface Topology in the Electrical Discharge Machining

Schulze

Mecke

2014

KEM

View full text Add to dashboard Cite

For the EDM, it is important that the surface topology can be determined for given process parameters in advance. Simulations with constant plasma channel radius are very inaccurate and only give a limit of thermally-influenced zone to. Many functional relationships of the temporal change of the plasma channel are only for small time periods and do not reflect properties of the dielectric. In the paper is shown how various properties of the dielectric, contribute to the change of the plasma channel and the plasma channel as different behaviors can be treated with one simulation program. The maximum thermal load may be calculated by selective application of simulation, but also the topologies through moving or split plasma channels. This extended simulation is important because in the micro-EDM process instabilities leading to the splitting of the plasma channels. The simulations are reviewed on the basis of individual discharges and corrected corresponding weighting factors.

show abstract

Section: Collapse Of the Gas Bubblementioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Influence of Plasma Channel Change on the Surface Topology in the Electrical Discharge Machining

Schulze

Mecke

2014

KEM

View full text Add to dashboard Cite

show abstract

“…This analysis can be carried out with an exactness of 500 nm. For making a comparison between the CLSM-analysis and the HSFC-images, all the observations were done in the same measuring cell [1,3].…”

Section: Experimental Methodsmentioning

confidence: 99%

Influence of selected groups of additives on breakdown in EDM sinking

Rehbein

Schulze

Mecke

et al. 2004

Journal of Materials Processing Technology

Self Cite

View full text Add to dashboard Cite

“…Based on the description of EDM currents presented in Refs [28,29], the capacitive discharge consists of the following phases:…”

Section: Origin and Identification Of Edm Currentsmentioning

confidence: 99%

“…It is worth mentioning that the variation of DA throughout the test duration was not considered in this test; therefore, the discharge occurrence frequency expressed in Figure 8 is the average frequency. The chosen test intervals and limit values for each parameter were set based on the literature [19,20,[28][29][30], as well as the test bench limitations. For example, the voltage test values were initially set to (5…30) V. Then, the results showed rare occurrence of discharge for voltage levels above 20 V; this justifies not taking these values into consideration in the following results.…”

Section: Operation Conditions Effect On Discharge Activitymentioning

confidence: 99%

Analysis of capacitive discharges in motor bearings under different operation conditions

Jammoul,

Pusca,

Romary

et al. 2024

IET Electric Power Appl

View full text Add to dashboard Cite

Despite being a well‐known problem, bearing faults are still one of the major challenges that the industry face. The growing use of voltage source inverters imposed the alertness of possible bearing damage due to their high‐frequency signals. The aim of this paper is to investigate the effect of capacitive discharges on a rolling element bearing to obtain a series of faulty bearings with different deterioration levels. An ageing test bench is built to generate bearing roughness using Electric Discharge Machining. The purpose is to study the effect of operation conditions, such as frequency of drive, amplitude of shaft voltage, radial load level as well as rotational speed, on the capacitive discharge occurrence within the bearing. Having the desire to further understand this phenomenon, the influence of each parameter on the discharge activity and the discharge waveform is analysed. A worst‐case scenario is conducted and applied to a series of bearings. Finally, the bearing damage is examined, and a quantitative fault detection method is presented based on a microscopic inspection of the bearing's surface.

show abstract

Measurement equipment for investigation of the influence of viscosity of dielectric working fluids on spark erosion

Cited by 11 publications

References 1 publication

Influence of Plasma Channel Change on the Surface Topology in the Electrical Discharge Machining

Influence of Plasma Channel Change on the Surface Topology in the Electrical Discharge Machining

Influence of selected groups of additives on breakdown in EDM sinking

Analysis of capacitive discharges in motor bearings under different operation conditions

Contact Info

Product

Resources

About