Coiler drum and coiling method capable of preventing steel coil from collapsing

Abstract

The invention discloses a coiler coiling block capable of preventing steel coils from collapsing and a coiling method. The coiler coiling block comprises a rubber sleeve, a fan-shaped plate, a coilingblock pyramid body and a coiling block hollow main shaft, a diameter expanding cylinder, a rotary oil feeder installed at one end of the diameter expanding cylinder, a pull rod inserted into a pistonof the diameter expanding cylinder and fixedly connected with the piston and a displacement sensor installed at the tail end of the rotary oil feeder. The signal receiving end of the displacement sensor passes through the rotary oil feeder until the signal receiving end extends into a cavity of the pull rod, and the other end of the pull rod is inserted into the coiling block hollow main shaft and connected with the coiling block pyramid body through keys; and the thickness of rubber sleeve is about 15-20 mm. The coiler coiling block capable of preventing the steel coils from collapsing has afunction of secondary expansion and contraction and adopts the thin rubber sleeve; by increasing the additional tension of coiling, the coiling length of an additional tension area and the secondarydiameter expanding force of the coiling block are increased; and the stiffness of hard core layers of the steel coils can be improved under the combined action, so that the problem of collapsing of the steel coils is solved.

Description

technical field [0001] The invention relates to the technical field of metallurgical steel rolling machinery, in particular to a coiler drum and a coiling method capable of preventing steel coils from collapsing. Background technique [0002] After the steel coil is unloaded from the coiler of the production line, or in the process of hoisting, transportation, stacking, and storage, the steel coil will be deformed, and the inner hole of the steel coil will change from a perfect circle to an ellipse. This is the so-called Collapsing or flat rolling. The collapse of the roll will affect the normal use of the machine in the next process or the user, and bring great losses to the manufacturer. In order to correct the coil shape, a lot of manpower and material resources have to be spent, and sometimes the steel coil is even cut, which seriously disrupts the normal production organization, reduces the product yield, increases the user cost, and restricts the production line produ...

AI Technical Summary

Problems solved by technology

The collapse of the roll will affect the normal use of the machine or the user in the next process, and bring great losses to the manufacturer.

In order to correct the coil shape, a lot of manpower and material resources have to be spent, and sometimes the steel coil is even cut, which seriously disrupts the normal production organization, reduces the product yield, increases the user cost, and restricts the production line production efficiency

At present, in order to improve the collapse of steel coils, most cold-rolling manufacturers adopt the method of increasing the coiling tension and reducing the amount of oil applied to the strip. However, increasing the coiling tension can not only increase the radial pressure of the inner layer of the steel coil, but also Increase the tangential stress of the inner layer of the steel coil. When the tangential stress is greater than the static friction force between the layers of the steel coil, collapse will still occur. At the same time, the coiling tension is too large, and the strip steel in the inner layer of the steel coil will produce wrinkles, roll marks, etc. Core surface quality defects; reducing the amount of oil on the strip surface is also at the expense of reducing user quality requirements

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