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In a rolling mill, the screw down (usually electrically operated in big mills) is the mechanism for setting up the spacing between the rollers, called the roll gap. The top roll balancing mechanism is a mechanical (rods, springs) or hydraulic setup to hold the top roller up in contact with the screw down. The larger mills we see in operation have massive rollers, and they have considerable weight. The whole of the upper roll mechanism will be set in heavy chocks to to stabilize it and distribute the loads of the rolling operation. Additionally, we often see mills with backup rollers, and the top work roller and backup roller pair will be held in contact with the screw down by the top roll balancing mechanism. There is a bit more to this when we consider the dynamic operation of the biggest rolling mills, but the basics remain the same. The thickness of the product, the "indexing" of the roll gap, will be set by the screw down. And the the top roller is held up against the screw down by the top roll balancing mechanism.
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What is a screw thread mechanism?
Picture a nut on a screw. You are holding the nut so it can't turn, but allow it to go up and down the screw. The screw is restrained so it can turn, but not move back and forth. As you turn the screw one way and the other, the nut will move up and down the screw. That is a trivial example of one very common screw thread mechanism.
Is corkscrews simple machines?
Screw
How can a electric motor be used to raise and lower a lift cage?
An electric motor can raise and lower a lift cage by using a system of pulleys and cables or a screw mechanism. When the motor is powered, it can rotate a drum or screw, which either winds or unwinds the cable, raising or lowering the lift cage accordingly. The motor's direction of rotation determines whether the lift moves up or down. Additionally, the motor can be controlled precisely, allowing for smooth and safe operation of the lift.
What is thread depth?
It's the depth of the cut from the crest of the surface down to the base on a bolt or screw.
Can you cross thread or strip a screw when removing it.?
Yes, you can cross-thread or strip a screw when removing it. Cross-threading occurs when the screw is misaligned and forced into the hole, damaging the threads. Stripping happens when the screwdriver slips or the screw head is worn down, preventing proper grip. Both issues can make it difficult to remove the screw and may require special tools or techniques to resolve.
What is a screw thread mechanism?
Picture a nut on a screw. You are holding the nut so it can't turn, but allow it to go up and down the screw. The screw is restrained so it can turn, but not move back and forth. As you turn the screw one way and the other, the nut will move up and down the screw. That is a trivial example of one very common screw thread mechanism.
What is the symbols for a screw down valve?
symbol for screw down non return valve
Which way do you turn the idol screw on a fourwheeler to go down?
You turn the screw in to idol down
Which way do you adjust the pressure adjustment screw on most pressure regulators to lower the psi?
Screw down = pressure up. Screw up = pressure down.
What are the release dates for Rolling Down the Rio - 1919?
Rolling Down the Rio - 1919 was released on: USA: 2 November 1919
What are the release dates for Rolling Down to Reno - 1947?
Rolling Down to Reno - 1947 was released on: USA: 18 November 1954
How do you get your 99 vw cabrio convertible top to go down?
Hey, it's easy. Put emergency brake on. Open the trunk, look to the left and take off the round piece holding the mechanism. Just turn the little screw thingy counterclockwise--then go up front and unlatch and pull your roof down manually---then go back and tighten up the screw clockwise. When I found out how much it cost to replace the mechanism so it would work automatically, I figured manual's much easier and cheaper!
What are the release dates for Children Rolling Down Hill - 1900?
Children Rolling Down Hill - 1900 was released on: USA: September 1900
What is a sentence for bankrolling?
rolling down a bank
What are the release dates for Rolling Down the Great Divide - 1942?
Rolling Down the Great Divide - 1942 was released on: USA: 24 April 1942
What are some examples of rolling friction?
Some examples of rolling friction include a car's tires rolling on the road, a ball rolling on the ground, and a person riding a bike. Rolling friction occurs when an object rolls over a surface and is caused by the deformation and adhesion of the surfaces in contact.
What are examples for motion?
A ball rolling down a hill.
