JPS6222245Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wiper for a strip mill that removes rolling oil adhering to the strip attached to the strip mill.

As is known, in strip rolling,
For the purpose of cooling the rolling rollers or maintaining stable rolling conditions, roll coolant oil or
Although rolling is performed while supplying lubricating oil, etc., the above-mentioned roll coolant oil adheres to the surface of the strip of the rolling mill, causing various problems. For example, there are problems with oil stain generation during the strip annealing process, increased production costs due to an increase in the consumption of roll coolant oil during rolling operations, and problems with coil handling due to misalignment during strip winding. Various problems are raised, such as problems with

Therefore, various types of wipers have been proposed to be placed on the exit side of a rolling mill to remove roll coolant oil and the like adhering to the strip. For example, there are roller type or pad type wipers that mechanically contact and remove the strip, or air wipers that spray compressed air against the running strip, but pad type wipers are in constant sliding contact with the strip. This causes metal powder etc. to adhere to the pads, which causes surface flaws.In the case of roller type wipers, roll coolant oil, etc. flows around from both sides of the rollers, so the wiper effect cannot be expected to be very effective. In this case, extremely high pressure is required to completely remove the roll coolant oil, leading to an increase in equipment costs, and a reliable wiper effect cannot be expected with either method.

Furthermore, as described in Japanese Utility Model Application No. 53-039508, there is a structure in which a number of air nozzles are arranged in a rectangular shape above the strip. Oil leakage is slow because the air interferes with each other. In other words, even if the air nozzle in the center of the strip is used to blow away the oil on the strip surface, the air nozzle next to the outside forms a film of air, so the oil is not blown away by the air nozzle in the center. Oil can only be blown out to the adjacent air nozzle. Therefore,
With a ``bent'' nozzle, the oil in the center of the strip can hardly be blown away, and there is a problem in that the oil is drained more easily in the center of the strip.

The present invention was devised in view of the above-mentioned points, and its features include a pair of upper and lower rollers that sandwich the running strip, and a tangential line between the roller and the strip on the strip exit side of the rollers, and This consists in that nozzles that inject compressed air into the center of the strip are arranged above and below the pass line.

The wiper for a rolling mill according to the present invention will be described in detail below based on the embodiment shown in FIG.

A pair of upper and lower rollers 2 and 3 facing the pass line along which the strip 1 runs are rotatably supported (not shown), and are movable toward and away from the pass line to sandwich the strip 1. I'm starting to do that. At the strip output side position of the rollers 2 and 3, with respect to the tangent between the strip 1 sandwiched between the rollers 2 and 3 and the rollers 2 and 3, and at the center position in the width direction of the strip 1. a nozzle 4 that injects compressed air to
And, 5 is placed on the target with the pass line narrowed.

It is preferable that the nozzles 4 and 5 for injecting this compressed air be provided on the frame that supports the rollers 2 and 3, and it is also desirable to adjust the amount of compressed air to be ejected from the upper and lower nozzles 4 and 5, respectively. Furthermore, it is preferable that the injection angle is also adjustable.

In the wiper for a rolling mill according to the present invention having the above-described configuration, by sandwiching the running strip 1 between the pair of upper and lower rollers 2 and 3, roll coolant oil etc. adhering to the surface of the strip 1 can be squeezed out. By injecting compressed air from the nozzles 4 and 5 to the tangential portions of the rollers 2 and 3 to the strip 1, a compressed air layer is formed by the compressed air on the exit side of the rollers 2 and 3, and the compressed air flows into the roller 2. , 3, the remaining roll coolant oil etc. are blown away toward the side edges of the strip 1, and in addition, the strip 1 is pinched at both ends of the rollers 2 and 3. It becomes possible to wipe the roll coolant oil on the strip 1 by preventing the roll coolant oil from entering behind the strip through the gap formed by the strip.

As is clear from the above, according to the wiper for a rolling mill according to the present invention, by arranging the rollers that sandwich the strip and the nozzle that sprays compressed air on the exit side of this roller, the wiper can adhere to the surface of the strip. It is possible to effectively wipe off roll coolant oil or lubricating oil, etc., which is caused by the roll coolant oil, so it is possible to efficiently collect roll coolant oil with the wiper. It is possible to prevent winding misalignment, and therefore the rolling speed can be improved, which has extremely large effects compared to its simple structure.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the concept of a wiper for a rolling mill according to the present invention. 1... Strip, 2, 3... Roller, 4,
5... Nozzle.

Claims (1)

[Scope of utility model registration request] A pair of upper and lower rollers sandwich the running strip, and a nozzle that injects compressed air toward the center of the strip is placed at the tangent between the roller and the strip on the exit side of the roller and faces the pass line. A wiper for a rolling mill characterized by being arranged above and below.