Discharge duration of single pulse Calculator

✖Volume of crater is defined as the Volume of crater made by an electric spark during EDM.ⓘ Volume of Crater [V]			+10% -10%
✖Ultimate Tensile Strength (UTS) is the maximum stress that a material can withstand while being stretched or pulled.ⓘ Ultimate Tensile Strength [S_ut]			+10% -10%
✖Mean current setting is the current set to mean current value during unconventional machining of EDM.ⓘ Mean Current Setting [I_m]			+10% -10%

✖Sparking time is defined as the time for which a spark is sustained.ⓘ Discharge duration of single pulse [τ_s]

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Formula

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Discharge duration of single pulse

Formula

`"τ"_{"s"} = ("V"*"S"_{"ut"})/(3.25*"I"_{"m"}^(3/2))`

Example

`"39.16284s"=("3mm²"*"15N/mm²")/(3.25*("0.5A")^(3/2))`

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Discharge duration of single pulse Solution

STEP 0: Pre-Calculation Summary

Formula Used

Sparking time = (Volume of Crater*Ultimate Tensile Strength)/(3.25*Mean Current Setting^(3/2))
τ_s = (V*S_ut)/(3.25*I_m^(3/2))
This formula uses 4 Variables

Variables Used

Sparking time - (Measured in Second) - Sparking time is defined as the time for which a spark is sustained.
Volume of Crater - (Measured in Square Meter) - Volume of crater is defined as the Volume of crater made by an electric spark during EDM.
Ultimate Tensile Strength - (Measured in Pascal) - Ultimate Tensile Strength (UTS) is the maximum stress that a material can withstand while being stretched or pulled.
Mean Current Setting - (Measured in Ampere) - Mean current setting is the current set to mean current value during unconventional machining of EDM.

STEP 1: Convert Input(s) to Base Unit

Volume of Crater: 3 Square Millimeter --> 3E-06 Square Meter (Check conversion here)
Ultimate Tensile Strength: 15 Newton per Square Millimeter --> 15000000 Pascal (Check conversion here)
Mean Current Setting: 0.5 Ampere --> 0.5 Ampere No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

τ_s = (V*S_ut)/(3.25*I_m^(3/2)) --> (3E-06*15000000)/(3.25*0.5^(3/2))

Evaluating ... ...

τ_s = 39.1628371118703

STEP 3: Convert Result to Output's Unit

39.1628371118703 Second --> No Conversion Required

FINAL ANSWER

39.1628371118703 ≈ 39.16284 Second <-- Sparking time

(Calculation completed in 00.004 seconds)

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Home » Engineering » Production Engineering » Unconventional machining processes » Electro Discharge Machining (EDM) » Volume of crater made by an electric spark » Discharge duration of single pulse

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Created by Rajat Vishwakarma

University Institute of Technology RGPV (UIT - RGPV), Bhopal

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National Institute Of Technology (NIT), Hamirpur

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< 5 Volume of crater made by an electric spark Calculators

Diameter of crater

Go Larger Diameter = sqrt((8*(Volume of Crater-(pi/6)*Depth of Machined Surface^3))/(pi*Depth of Machined Surface))

Mean current setting from crater volume

Go Mean Current Setting = ((Volume of Crater*Ultimate Tensile Strength)/(3.25*Sparking time))^(2/3)

Volume of crater related to mean current setting

Go Volume of Crater = 3.25*10^6/Ultimate Tensile Strength*Sparking time*Mean Current Setting^(3/2)

Discharge duration of single pulse

Go Sparking time = (Volume of Crater*Ultimate Tensile Strength)/(3.25*Mean Current Setting^(3/2))

Ultimate tensile strength of work piece material

Go Ultimate Tensile Strength = (3.25*Sparking time*Mean Current Setting^(3/2))/Volume of Crater

Discharge duration of single pulse Formula

Sparking time = (Volume of Crater*Ultimate Tensile Strength)/(3.25*Mean Current Setting^(3/2))
τ_s = (V*S_ut)/(3.25*I_m^(3/2))

What factors affects surface finish during EDM ?

The amount of material removed and the surface finish produced is dependent upon the current in the spark. The material removed by the spark can be assumed to be a crater. The amount removed therefore will depend upon the crater depth, which is directly proportional to the current. Thus as the material removed increases and at the same time the surface finish also decreases. However, decreasing the current in the spark, but increasing its frequency will improve the surface finish in view of the small crater size, but at the same time the material removal rate can be maintained by increasing the frequency.

How to Calculate Discharge duration of single pulse?

Discharge duration of single pulse calculator uses Sparking time = (Volume of Crater*Ultimate Tensile Strength)/(3.25*Mean Current Setting^(3/2)) to calculate the Sparking time, The Discharge duration of single pulse formula is defined as time for which a spark can be sustained before breaking and generation of a new spark. Sparking time is denoted by τ_s symbol.

How to calculate Discharge duration of single pulse using this online calculator? To use this online calculator for Discharge duration of single pulse, enter Volume of Crater (V), Ultimate Tensile Strength (S_ut) & Mean Current Setting (I_m) and hit the calculate button. Here is how the Discharge duration of single pulse calculation can be explained with given input values -> 652.714 = (3E-06*15000000)/(3.25*0.5^(3/2)).

FAQ

What is Discharge duration of single pulse?

The Discharge duration of single pulse formula is defined as time for which a spark can be sustained before breaking and generation of a new spark and is represented as τ_s = (V*S_ut)/(3.25*I_m^(3/2)) or Sparking time = (Volume of Crater*Ultimate Tensile Strength)/(3.25*Mean Current Setting^(3/2)). Volume of crater is defined as the Volume of crater made by an electric spark during EDM, Ultimate Tensile Strength (UTS) is the maximum stress that a material can withstand while being stretched or pulled & Mean current setting is the current set to mean current value during unconventional machining of EDM.

How to calculate Discharge duration of single pulse?

The Discharge duration of single pulse formula is defined as time for which a spark can be sustained before breaking and generation of a new spark is calculated using Sparking time = (Volume of Crater*Ultimate Tensile Strength)/(3.25*Mean Current Setting^(3/2)). To calculate Discharge duration of single pulse, you need Volume of Crater (V), Ultimate Tensile Strength (S_ut) & Mean Current Setting (I_m). With our tool, you need to enter the respective value for Volume of Crater, Ultimate Tensile Strength & Mean Current Setting and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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