Factor H at Neutral Point Formula

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Factor H at Neutral Point is used in rolling calculations to account for the interaction between the material, the rollers, and the deformation process. Check FAQs
Hn=Hi-ln(hihfi)μf2
Hn - Factor H at Neutral Point?Hi - Factor H at Entry Point on Workpiece?hi - Thickness before Rolling?hfi - Thickness after Rolling?μf - Friction Coefficient in Rolling Analysis?

Factor H at Neutral Point Example

With values
With units
Only example

Here is how the Factor H at Neutral Point equation looks like with Values.

Here is how the Factor H at Neutral Point equation looks like with Units.

Here is how the Factor H at Neutral Point equation looks like.

2.6179Edit=3.36Edit-ln(3.4Edit7.2Edit)0.4Edit2
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Factor H at Neutral Point Solution

Follow our step by step solution on how to calculate Factor H at Neutral Point?

FIRST Step Consider the formula
Hn=Hi-ln(hihfi)μf2
Next Step Substitute values of Variables
Hn=3.36-ln(3.4mm7.2mm)0.42
Next Step Convert Units
Hn=3.36-ln(0.0034m0.0072m)0.42
Next Step Prepare to Evaluate
Hn=3.36-ln(0.00340.0072)0.42
Next Step Evaluate
Hn=2.61788199299987
LAST Step Rounding Answer
Hn=2.6179

Factor H at Neutral Point Formula Elements

Variables
Functions
Factor H at Neutral Point
Factor H at Neutral Point is used in rolling calculations to account for the interaction between the material, the rollers, and the deformation process.
Symbol: Hn
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Factor H at Entry Point on Workpiece
Factor H at Entry Point on Workpiece is used in rolling calculations at the entry point to account for the interaction between the material, the rollers, and the deformation process.
Symbol: Hi
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Thickness before Rolling
Thickness before Rolling is the thickness of sheet before rolling operation begins.
Symbol: hi
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Thickness after Rolling
Thickness after Rolling is the final thickness of the workpiece after the rolling process.
Symbol: hfi
Measurement: LengthUnit: mm
Note: Value should be greater than 0.
Friction Coefficient in Rolling Analysis
Friction Coefficient in Rolling Analysis (μ) is the ratio defining the force that resists the motion of one body in relation to another body in contact with it.
Symbol: μf
Measurement: NAUnit: Unitless
Note: Value should be between 0 to 1.
ln
The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function.
Syntax: ln(Number)

Other formulas in Rolling Analysis category

​Go Bite Angle
αb=acos(1-h2R)
​Go Maximum Reduction in Thickness Possible
Δt=μf2R
​Go Projected Length
L=(RΔt)0.5
​Go Angle Subtended by Neutral Point
φn=hfiRtan(Hn2hfiR)

How to Evaluate Factor H at Neutral Point?

Factor H at Neutral Point evaluator uses Factor H at Neutral Point = (Factor H at Entry Point on Workpiece-ln(Thickness before Rolling/Thickness after Rolling)/Friction Coefficient in Rolling Analysis)/2 to evaluate the Factor H at Neutral Point, factor H at neutral point refers to the depth of penetration of the workpiece into the roll gap at the point where the material experiences zero relative velocity with respect to the rolls. Factor H at Neutral Point is denoted by Hn symbol.

How to evaluate Factor H at Neutral Point using this online evaluator? To use this online evaluator for Factor H at Neutral Point, enter Factor H at Entry Point on Workpiece (Hi), Thickness before Rolling (hi), Thickness after Rolling (hfi) & Friction Coefficient in Rolling Analysis f) and hit the calculate button.

FAQs on Factor H at Neutral Point

What is the formula to find Factor H at Neutral Point?
The formula of Factor H at Neutral Point is expressed as Factor H at Neutral Point = (Factor H at Entry Point on Workpiece-ln(Thickness before Rolling/Thickness after Rolling)/Friction Coefficient in Rolling Analysis)/2. Here is an example- 2.617882 = (3.36-ln(0.0034/0.0072)/0.4)/2.
How to calculate Factor H at Neutral Point?
With Factor H at Entry Point on Workpiece (Hi), Thickness before Rolling (hi), Thickness after Rolling (hfi) & Friction Coefficient in Rolling Analysis f) we can find Factor H at Neutral Point using the formula - Factor H at Neutral Point = (Factor H at Entry Point on Workpiece-ln(Thickness before Rolling/Thickness after Rolling)/Friction Coefficient in Rolling Analysis)/2. This formula also uses Natural Logarithm Function function(s).
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