ELECTROSTREAM DRILLING PDF

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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So far, parametric study reported involved the usage of salt electrolytes only. H 2 S 04can be used to machine carbon steel, stainless steel, udimet, rene.

Full text of “Electrostream Drilling Of High Speed Steel”

Specifications of the power supply unit used in ESD are, as follows. During expeumeutatiou fine feed is given to the tool manually. The work piece can be given horizontal feed manually, so that a hole can be drilled in a new position. As a result high voltages are essential to over- come the ohmic resistance due to this gap for machining to takes place. In such cases, non-traditio. An acidic electrolyte, however, dissolves the metal, and carries away as metal ions Fig 1.

The least count of the instrument is 0. Contact between ddrilling tool and the side wail. They also reported the electtostream of electrolyte in ESD for machining a specific kind of workpiece material.

This problem occured quite often and at this point contin- uous arcing was observed. Thus, the hole width would increase much slower than its length. This is so because machining has a special status in the whole spectrum of all manufacturing processes.

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After machining, the workpieces are parted off by removing the solder. Let y be the estimated response at a point on the fitted second order surface as given by equation given below. Jain [2] has studied the electro chemical drilling process using bare, coated and bit type electrodes. Performed experiments demonstrated feasibility of the use of HCl as elec- trolyte in place of normally used NaCl.

Electrostrezm the two ends of the machined profile, readings of the micrometer were noted down. As a result more machining current will flow to the machining zone. Using finite element technique FETanodic profiles for different cases have been obtained and a comparison has been made between experimental and analytical anodic profiles.

I am thankful to the staff of manufacturing Science Laboratory, Mr. I am very much grateful to my parents who always supported me despite many problems in all the circum- stances. Chapter 4 Conclusions and scope for the future work 4.

Electrostream Drilling Of High Speed Steel

According to the plan 13 experiments are conducted. New York American Elsavier publishing company, This increase in diameter is attributed partly to the stray current effect and ptirtly to the fact that this portion of the work piece is subjected for maximum period of time to electro-chemical dissolution throughout the machining operation [2].

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The method shows advantages over other hole making techniques in terms of the resulting surface quality and process reliability. Rigidity requirements for the tool is another major problem in conventional drilling of small and deep holes. For conducting experiments at different electrolyte concentrations, the same proce- dure is repeated with a freshly prepared electrolyte.

Process details of ESD and STEM are reported in [1, 5, 6, 7, 8] Kozak, Rajurkar and Balakrishna [9] have reported a mathematical model for determining relationship between the machining rate and working conditions electrolyte flow velocity, jet length and voltage. Electrolyte HCl Experiments were conducted using hydro chloric drrilling [HCl at different con- centrations.

Ti and electrolyte concentration 2: With increase in voltage, machined depth initially incrcjtses reaches a maximum value and then decreases. This avoids flowing of liquid on the chamber walls and thereby improves the process drillinng to the user. At the bottom of the hole due to large gap, the current density would decrease, with the result that comparatively lower overcut low mix takes place and hence the profile gets twisted towards the center.