In the relation of max draft, draft is directly proportion to the radius R of the roller. But since R increases, the angle of bite decreases and so the the draft should also decrease. Then how its possible?
What is the physics behind rolling process? Most says it is due to a net friction force but which friction forces and on which direction do they act? As per my understanding, both the rolls and the material are moving along the same direction. Since friction will always act opposite to the direction of motion, thus the frictional forces here are adverse in nature. Therefore even if there is a net frictional force, it won't help in rolling process but will make the system to apply more force, more torque to roll the roller as the combined net frictional forces are in opposite direction, to both the roll and the material. Is this understanding reasonable or is it wrong? Sir, please let me know.
dude generally rollers are available above and below the metal piece so thickness and length only get affected if roller are available at the sides also then its width get affected
Actually here it is assumed that width is constant. This happens when width of metal ingot is very large compared to height of metal ingot. If b/t ratio is less then significant change in width can take place which lead to spreading. Hence vertical rollers are used to constrain the edges of metal ingot being rolled.
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Thank you very much.
Tnq so much for this sir
In the relation of max draft, draft is directly proportion to the radius R of the roller. But since R increases, the angle of bite decreases and so the the draft should also decrease. Then how its possible?
Sir in angle of bite and draft there should be inverse relation ??
For dmax high roler dia means less angle of bite ??
I want same calculation when width change while rolling of billets ovel pass to round pass in difference final sizes
Please correct arrow of rotation inside work rolls.These should be opposite to each other,else metal would never be rolled.
Sir do u have explain how to reduce melting energy consumption for induction furnace for iron foundry it's very useful for our improvements
sir ji I want to inform you . There is no running my study centre on Saturday and Sunday. pls tell me sir.
The derivation of equations are missing
sir can you tell me the reference book for coefficient of friction range for cold rolling
please reply as fast as possible
How to get assignment answer
What is the physics behind rolling process? Most says it is due to a net friction force but which friction forces and on which direction do they act?
As per my understanding, both the rolls and the material are moving along the same direction. Since friction will always act opposite to the direction of motion, thus the frictional forces here are adverse in nature. Therefore even if there is a net frictional force, it won't help in rolling process but will make the system to apply more force, more torque to roll the roller as the combined net frictional forces are in opposite direction, to both the roll and the material.
Is this understanding reasonable or is it wrong?
Sir, please let me know.
Sir , in rolling why width is constant?
dude generally rollers are available above and below the metal piece so thickness and length only get affected
if roller are available at the sides also then its width get affected
there are rollers at both sides to control the width.
Width is not constant in each case. it can be assumed as constant in flat rolling, only in case, if existing width is 5 times of thickness.
Actually here it is assumed that width is constant. This happens when width of metal ingot is very large compared to height of metal ingot. If b/t ratio is less then significant change in width can take place which lead to spreading. Hence vertical rollers are used to constrain the edges of metal ingot being rolled.
I was looking for neutral point pressure variation equation...... Dissatisfied
do u hv all subjects lectures?
abe chutiye aadmi tere bs ke bahar hai engineering . chor de . lund sa all subject ectures
What kind of teaching is this? Handbooks are enough for writing the formulas! Why need a teacher?
Very bad teaching skills!
This could have been more intereand engaging, not a worth session