Questions tagged [rolling]

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2 votes
3 answers
69 views

Is there a positive displacement pump that experiences only rolling resistance?

Is there a positive displacement pump that experiences only rolling resistance? One with no sliding friction and diaphragm stretching?
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2 votes
2 answers
106 views

Effects of rolling resistance on wheel angular and vehicle longitudinal speed

The differential equation for wheel speed can be given as: In here, $T_t$ is driving torque (not braking), $F_x$ is longitudinal force of tyre, $J_w$ is wheel inertia, $\dot{w}$ is angular speed of ...
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  • 45
3 votes
1 answer
101 views

What's the purpose of trimming loops at ends of every coil?

Recently I visited the steel industry, I discover contract workers trimming loops of head and tail side of every coil: For 12mm rebar coils, they have to trim 8 loops at head and 3 loops at tail side....
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  • 53
2 votes
1 answer
48 views

What's the purpose of spraying water on rebar coils but not on plain coils?

Recently, I visited industry where they produce steel coils (rebar + plain coils). At the end of the production process, I discover that rebar coils are getting sprayed by water: Whereas plain coils ...
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  • 53
0 votes
2 answers
39 views

Why steel coils are called Wire rod?

From google, I got this meaning of Wire rod: Wire rod is a long steel semi-finished product manufactured by hot rolling billets on continuous rolling mills. Here is the stack of steel coils: Why ...
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1 vote
0 answers
14 views

How can I learn the standards(EN,ANSI,ISO) which is related to "roller hemming method in automotive industry"?

There is a method using in automotive industry which is called roller hemming. I have a project about this method but before beginning the project I need to learn the standards(EN,ANSI or ISO) which ...
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-3 votes
1 answer
607 views

Can a rolling wheel create a side force without first rotating on a vertical axis at its contact patch? [closed]

There is something wrong with the way we describe how a cornering vehicle wheel creates a cornering force. I think a rolling wheel must first rotate on a vertical axis to then create the cornering ...
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1 vote
2 answers
58 views

MANUFACTURING PROCESS: ROLLING PROCESS

In the rolling process, Why should the velocity of the strip at the entry before coming in contact with roller be lesser than the velocity of the roller?
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  • 51
1 vote
0 answers
66 views

Why increasing the coefficient of friction results in evenly distributed load in rolling machines?

I'm designing a rolling machine for reduction of steel ingots of $5 mm$ to $1.96 mm$ thick. I can convince myself using equations why increasing the coefficient of friction (in case of lubrication ...
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