This article describes the applications, process capabilities, and limitations and advantages of electrostream and capillary drilling. It describes equipment and. NPTEL provides E-learning through online Web and Video courses various streams. Book Source: Digital Library of India Item : Sridhar ioned.

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The casing of the pump is made of gunmetal, which is partially anti 17 2.

The voltage used in the process is of the order of V. The general equation showing their relationship is as follows: July, Acknowledgement I take this opportunity to express the feeling of sincere gratitude tov’. The general form of a quadratic second degree polynomial in two x-variables is as follows. This reversing of polarity is to be done periodically electrostrem allow continuous flow of electrolyte. Suggestions for the application of metal removal as a metal working technique were proposed by W.

At lower voltages the deposit formation is observed to be Ic. Comparison of various non-traditional hole making processes [1] 3 STEM process gives the max machined depth.

I am extremely thankful to the staff of central glass blowing people for their help in fabricating the glass nozzle. A platinum wire inserted in the nozzle acts as cathode. Values of parameters for different levels 28 References 1.

Full text of “Electrostream Drilling Of High Speed Steel”

The glass nozzle is gripped in the nozzle holder. The effect of applied voltage on spike volume was not significant.

This increase in current causes more luateritd removal. Ti and electrolyte concentration 2: Asymmetry is observed in opposite faces of hole profiles, this may be due location of hole center not exactly along the parting line; The 3-phase V A. As the charged electrolytic stream impinges on electrlstream work piece, material is re- moved through electrolytic dissolution and is flushed out from the interaction area in the form of metal ions in the solution.


The pump selected for ESD has the following specifications, Head: This super-alloy has elctrostream high-temperature resistant properties, and is used in lurnacc mulflcrs, electronic components, heat exchanger tubing, nuclear reactors, springs and jet engine parts. Workpiece is removed from the vice and thoroughly washed with water to remove any traces of electrolyte.

Electrostream Drilling Of High Speed Steel

It retains high hardness while cutting metal at very high speeds. The more familiar machining operations include turning, boring, milling, planing, broaching and grinding. This feed is achieved with the help of T-slot and slide mechanism in the work vice.

Effect of applied voltage and electrolyte concen- tration on machined mass or material removalmachined hole outer diameter top surface diameterand machined depth are presented and discussed.

So far, parametric study reported involved the usage of salt electrolytes only. So in the present work BSD is carried out using acidic electrolytes. Electro stream drilling ESD was found to be a potential process for drilling micro holes in these materials.

The complete conversion table is tabulated in Table 2. The combind head due to gravity and pump drlling in flowrate greater than theoritical value i.

Sridhar Sastry, has been carried out under our supervision and that this work has not eleftrostream submitted driilling for a degree. Contact between the tool and the side wail. Their tests with different amount of carbon in the steels emphasize that carbon itself, or its effect on the metallurgical structure plays an important role in ddrilling the passivation. Performed experiments demonstrated feasibility of the use of HCl as elec- trolyte in place of normally used NaCl.


After 30 min, the pump is switched off. The design of experiment is the procedure of selecting the number of trials and conditions for running them, essential and sufficient for solving a prob- lem that has been set with the required precision. Vinod Yadav for their constant encouragement and suggestions in writing the thesis.

Faraday in estab- lished the laws of electrolysis. The tool feed rate electrosteam la. Pipes are clamped at the junctions by wire clamping to avoid the release of pipes due to electrolyte pressure.

In the present work acidic electrolyte HCl is employed for machining of the work material. This is so because machining has a special status in the whole spectrum of all manufacturing processes. Work piece can be held in the work vice with the help of a tightening screw made of perspex.

Shaped tube electrolytic machining is a specialized ECM technique for drilling small, deep holes utilizing acid electrolytes. Then the workpiece is dried under an electric bulb to completely remove any Icft-out traces of liquid from the machined blind hole. This is due to an increase in concentration of electrolyte which leads to increase in its electrical conductivity.