JP4986939B2 - Draining device for rolling rolls for steel sheet piles - Google Patents

Description

  The present invention relates to an apparatus for draining roll cooling water when rolling a steel sheet pile using a perforated roll.

  Rolling rolls used in rolling mills for rolling steel materials are affected by heat transfer from the rolled material, heat generation due to slippage between the rolled material and the rolled material, etc., which adversely affects the roll surface. Cooling is taking place.

  However, when the roll cooling water adheres to the steel material before rolling, the temperature of the steel material decreases and the rolling resistance increases, which adversely affects the quality of the rolled steel sheet pile represented by the claw portion. Moreover, a bad influence generate | occur | produces also on a rolling roll surface.

  For example, in rolling of shape steel, even if roll cooling water adheres to the steel material before rolling, as shown in FIG. 7, the upper roll 1a and lower roll 1b and the steel material 2 are in contact with each other at the time of rolling. The roll cooling water is prevented from adhering to the surface.

  On the other hand, in rolling steel sheet piles, as shown in FIG. 8, the upper roll 1a and lower roll 1b and the steel material 2 are not necessarily in contact with each other during rolling. Therefore, in the portion where the upper roll 1a and lower roll 1b and the steel material 2 are not in contact with each other, the roll cooling water remains attached even at the rolling completion portion, and the adverse effect of the roll cooling water is increased.

  Therefore, the rolling mill is equipped with a draining device that seals the roll cooling water and prevents the roll cooling water from falling on the steel material before rolling.

As a conventional draining device, for example, as shown in FIGS. 9 and 10, there is a device that brings the tip of an elastic draining plate 3 into contact with the surface of the upper roll 1 a at a substantially right angle (Patent Document 1).
Japanese Utility Model Publication No. 58-13803

  In addition, FIG. 9 is the figure which showed the rolling roll periphery at the time of rolling of a U-shaped steel sheet pile, FIG. 10 is the upper rolling guide installed in the entrance side of rolling up-and-down roll 1a, 1b, respectively, 4b is a lower rolling guide, 4c is a side surface rolling guide, and 5 is a stopper attached to the base end side of the elastic draining plate 3.

  However, in the elastic draining plate disclosed in Patent Document 1, since the draining plate is difficult to deform in the direction perpendicular to the roll hole mold surface, a uniform draining effect in the axial direction of the rolling roll cannot be obtained.

Then, in order to solve the fault of the draining device disclosed in Patent Document 1, by using an inflatable bag body and adjusting the internal pressure of the bag body, the tip of the elastic draining plate is placed on the surface of the rolling roll. The thing made to contact is disclosed (patent document 2).
JP-A-8-215719

  However, since the draining device disclosed in Patent Document 2 requires many adjusting devices and adjusting valves such as adjusting the internal pressure of the bag body, the rolling equipment becomes excessive.

  The problem to be solved by the present invention is that, in the conventional apparatus, in order to effectively drain the roll cooling water, many adjustment devices and adjustment valves are required, so that the rolling equipment becomes excessive. It is.

The draining device of the rolling roll for steel sheet piles of the present invention,
In order to prevent roll cooling water from falling on the rolled steel without using many adjusting devices and adjusting valves,
An elastic drainage plate disposed above the upper guide of the rolling guide for guiding the steel material to the rolling roll, and having the tip in contact with the surface of the upper rolling roll of the rolling roll at a substantially right angle;
Located between the elastic draining plate and the upper rolling guide, the base end is positioned away from the rolling upper roll from the position where the elastic draining plate and the upper rolling roll are in contact, and the tip is A shape obtained by reversing the hole shape of the upper rolling roll, and a second elastic draining plate having the tip in contact with the surface of the upper rolling roll at a substantially right angle,
The most important feature is that both side ends of the second elastic draining plate have a length extending outward from the side surface portion rolling guide of the rolling guide.

  In the draining device for the steel sheet pile rolling roll of the present invention, when the stopper is provided at the base end of the second elastic draining plate, the roll cooling water can be more reliably prevented from falling on the rolled steel material. .

  In this invention, it can prevent reliably that roll cooling water falls on steel materials with a simple structure. Therefore, the temperature fall in the nail | claw part of the steel sheet pile which originates in roll cooling water falling on steel materials can be suppressed, and the nail | claw part shape defect of a steel sheet pile reduces.

  The inventors use the simple draining device disclosed in Patent Document 1 such as bringing the conventional elastic draining plate into contact with the surface of the rolling roll almost perpendicularly, and using another simple draining device together. Was examined.

  As a result, it was found that if a simple draining device is newly installed and used in combination with a conventional elastic draining plate, the roll cooling water can be drained effectively, and the present invention has been completed.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. 1 to 6 while explaining in detail the operation and problems of the draining device using the conventional elastic draining plate shown in FIGS. It explains using.

  In the draining device shown in FIG. 9 and FIG. 10, by pressing the elastic draining plate 3 against the surface of the upper roll 1a, the roll cooling water is flowed in the axial direction of the upper roll 1a to the steel material 2 before rolling. Prevents falling.

  However, in this conventional draining device, since the same draining cannot be performed at the hole portion and the portion where the hole mold does not exist, draining in the axial direction of the upper roll 1a becomes uneven, and the upper rolling roll Roll cooling water falls from the gap between 1a and draining plate 3.

  This roll cooling water falls through the gap a between the upper rolling guide 4a and the side surface rolling guide 4c to the claw portion 2a of the steel material 2 being rolled to lower the temperature of the claw portion 2a of the steel material 2, and after production Negatively affect the quality of the.

  Therefore, the inventors installed a second elastic draining plate 11 between the elastic draining plate 3 and the upper rolling guide 4a as shown in FIGS. In addition, FIG. 1 is the figure which showed the rolling roll periphery at the time of rolling of a U-shaped steel sheet pile, and FIG. 2 at the time of rolling of a hat-type steel sheet pile.

  The second elastic draining plate 11 is formed by reversing the shape of the hole shape of the upper rolling roll 1a in the shape of the tip that contacts the upper rolling roll 1a. It is used in contact.

  For example, the second elastic draining plate 11 is provided with a stopper 12 on the base end side opposite to the tip that comes into contact with the upper rolling roll 1a, and is 0 toward the both side ends from the axial center of the upper rolling roll 1a. An inclination angle α of not less than ° is provided.

  By setting it as such a structure, the flow of the roll cooling water to the axial direction of the rolling upper roll 1a is accelerated | stimulated, and it prevents that roll cooling water falls on the steel material 2 before rolling.

  From the above viewpoint, in FIG. 1 and FIG. 2, the position X1 where the stopper 12 is provided should be a position away from the rolling upper roll 1a from the position X2 where the elastic draining plate 3 and the rolling upper roll 1a contact. is necessary. Moreover, it is necessary to make the both ends of the 2nd elastic draining board 11 into the length which goes outside the side part rolling guide 4c.

  Thereby, it is possible to eliminate in a facility manner that the roll cooling water falls from the gap a between the upper rolling guide 4a and the side surface rolling guide 4c.

  FIG. 3 and FIG. 4 show an improved shape of the elastic draining plate 3 while keeping the configuration of the second elastic draining plate 11 described in FIGS.

  FIG. 3 shows an elastic draining plate 3 arranged in the axial direction of the upper roll 1a with an inclination angle β from one side end of the elastic draining plate 3 toward the other side end. . Moreover, FIG. 4 arrange | positions the elastic draining board 3 with the inclination | tilt angle of (gamma) from the center part of the elastic draining board 3 toward the both ends in the axial direction of the rolling upper roll 1a, respectively. .

  By adopting such a configuration, the flow of the roll cooling water in the axial direction of the upper roll 1a can be promoted, and the roll cooling water falling from the gap between the elastic drainer 3 and the upper roll 1a is reduced. be able to.

  As a result of applying the draining device of the present invention shown in FIG. 1 to rolling a type 4 steel sheet pile, it succeeded in preventing the roll cooling water from dropping from the gap between the upper rolling guide and the side surface rolling guide, as shown in FIG. Thus, it succeeded in temperature fall suppression of about 30 degreeC in the nail | claw part of a steel sheet pile.

  As a result, as shown in FIG. 6, the occurrence rate of the shape defect of the claw portion of the steel sheet pile after rolling decreased by about 9% at the start of rolling and by about 3% at the stable time.

  The present invention is not limited to the above example, and it goes without saying that the embodiments may be changed as appropriate within the scope of the technical idea described in each claim.

  For example, the stoppers 5 and 12 provided on the elastic draining plate 3 and the second elastic draining plate 11 are not necessarily required. Further, the second elastic draining plate 11 is not limited to one having a downward slope from the center to both side ends, but may be one having an inclination from one side end to the other side end.

  The above-mentioned present invention is applicable not only to U-type steel sheet piles and hat-type steel sheet piles but also to any other steel sheet piles.

It is the figure which showed the rolling roll periphery when rolling a U-shaped steel sheet pile using the draining apparatus of this invention, (a) is the figure seen from the entrance side of the rolling roll, (b) is from the side of the rolling roll. FIG. It is the same figure as FIG. 1 which showed the rolling roll periphery at the time of rolling of a hat-type steel sheet pile. It is a figure similar to FIG. 1 at the time of using the other draining apparatus of this invention. It is a figure similar to FIG. 1 at the time of using the further water draining apparatus of this invention. It is the figure which showed the temperature fall in the nail | claw part on a steel sheet pile when not installing when the draining device of this invention is installed at the time of rolling of a 4 type steel sheet pile. It is the figure which showed the incidence rate of the shape defect of the nail | claw part of the steel sheet pile after rolling with the case where the draining device of this invention is installed, and the case where it does not install at the time of rolling of a 4 type steel sheet pile. It is a figure explaining the case where roll cooling water adheres to the steel material under rolling at the time of rolling of shape steel. It is a figure similar to FIG. 7 at the time of rolling of a steel sheet pile. It is a figure similar to FIG. 1 at the time of using the conventional drainer. It is a figure similar to FIG. 2 at the time of using the conventional drainer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Rolling upper roll 1b Rolling lower roll 2 Steel material 2a Claw part 3 Elastic draining board 4a Upper rolling guide 4b Lower rolling guide 4c Side part rolling guide 11 2nd elastic draining board 12 Stopper

Claims (2)

An elastic drainage plate disposed above the upper guide of the rolling guide for guiding the steel material to the rolling roll, and having the tip in contact with the surface of the upper rolling roll of the rolling roll at a substantially right angle;
Located between the elastic draining plate and the upper rolling guide, the base end is positioned away from the rolling upper roll from the position where the elastic draining plate and the upper rolling roll are in contact, and the tip is A shape obtained by reversing the hole shape of the upper rolling roll, and a second elastic draining plate having the tip in contact with the surface of the upper rolling roll at a substantially right angle,
A draining device for a rolling roll for steel sheet piles, characterized in that both side ends of the second elastic draining plate have a length extending outward from the side surface rolling guide of the rolling guide.   The draining device for a steel sheet pile rolling roll according to claim 1, wherein a stopper is provided at a base end of the second elastic draining plate.

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