JP2011245498A - Universal rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a universal rolling mill, capable of correcting lateral deflection of a material to be rolled without flaws in spite of a simple structure.SOLUTION: The universal rolling mill 1 has correction rolls 9, 10 provided anterior to a pair of vertical rolls 4, 5 in a rolling direction of the material 6 to be rolled, the correcting rolls being supported so as to be rotatable in the same direction of a rotating direction of the vertical rolls 4, 5 and being configured so that the outer circumferential surfaces thereof contact the outside surfaces of flanges 6f of the material 6 to correct the lateral deflection of the material 6. The pair of vertical rolls 4, 5 and the correction rolls 9, 10 are pivotally supported by rotary tables 15, 16 supported respectively by a lateral pair of vertical roll chocks 7, 8 so as to be rotatable around vertical shafts 15a, 16a.

Description

  The present invention relates to a universal rolling mill for rolling a section steel having a flange such as an H-shaped steel or an I-shaped steel, and a universal rolling mill provided with means for correcting a horizontal bending in a rolling direction of a material to be rolled during rolling. Is.

  As shown in FIG. 1, the shape steel having flanges such as H-shaped steel and I-shaped steel is a universal rolling in which the upper and lower horizontal rolls 2 and 3 and the left and right vertical rolls 4 and 5 have axial centers on the same vertical plane. Roll forming is performed using the machine 1.

  Such a shape steel is rolled over a long length at a high temperature, and often warps and bends in the vertical and horizontal directions in the longitudinal direction. In particular, because of the rigidity of the shape steel, a large load is required to correct the bending in the left-right direction compared to the warping in the up-down direction, so it is difficult to correct after forming, and the bending in the left-right direction during rolling is difficult. It is necessary to correct.

  For example, in Patent Documents 1 and 2, a pair of left and right restraining rollers are respectively provided on the entry side and the exit side of the material to be rolled in the universal rolling mill, and rolling is performed while restraining the left and right sides of the material to be rolled on the entry side and the exit side. Thus, a rolling method for preventing the bending of the material to be rolled in the left-right direction is disclosed.

  Moreover, in patent document 3, while arrange | positioning the 1st guide of a left-right paired plate-shaped body in the exit side vicinity of the scissors roll in the chock of the scissors roll of a universal rolling mill, from the rolling mill to the exit side of a rolling mill What provided the 2nd pair of left and right 2nd guide provided with the some restraint roller which restrains the right and left of the to-be-rolled material which came out is disclosed.

  Further, Patent Document 4 by the present applicant discloses a rolling mill provided with a correction roll that is pivotally supported in the same direction as the reed roll at a position on the exit side of the reed roll.

JP 2000-140925 A JP 2000-176502 A JP 2007-196278 A JP 2010-12497 A

  However, Patent Documents 1 and 2 are configurations in which the restraining roller is provided outside the pair of left and right chocks on which the scissors roll is disposed, and the scissors roll and the restraining roller are disposed at positions separated from each other. Therefore, bending cannot be corrected about the front-end | tip part of the to-be-rolled material after passing a reed roll until it reaches a constraining roller. In addition, when the material to be rolled having a bent tip comes into contact with the restraining roller, the material to be rolled is shaken left and right, which affects the left-right symmetry during rolling and further increases the left-right bending.

  Moreover, in the said patent document 3, since the 1st guide is adjoining to a roll, in order to suppress the bending of a material to be rolled, the surface of a 1st guide and the surface of a material to be rolled are as close as possible or It is necessary to set the position of the first guide so as to come into contact, and as a result, the material to be rolled comes into contact with the plate-like first guide and wrinkles may occur on the surface. On the other hand, if a certain gap is provided between the surface of the first guide and the surface of the material to be rolled in order to suppress generation of wrinkles on the surface of the material to be rolled, the correction of the bending by the first guide becomes insufficient. The bend correction by the second guide is essential. In that case, the second guide described in Patent Document 3 has a complicated structure, and in order to suppress the bending, high positioning rigidity and high rigidity to prevent bending due to contact with the material to be rolled are necessary. Therefore, there is a problem that high cost is required.

  Patent Document 4 corrects the left and right bends of the material to be rolled with a simple configuration. However, since the position of the straightening roll is fixed, the position in the left and right direction can be changed as needed depending on the condition of the material to be rolled. It is difficult to adjust.

  An object of the present invention is to provide a universal rolling mill that has a simple configuration and can correct bending in the left-right direction according to the situation during rolling without wrinkling the material to be rolled.

  In order to solve the above problem, the present invention is a universal rolling mill that has a pair of upper and lower horizontal rolls and a pair of left and right saddle rolls, and forms a shaped steel having a flange by rolling a material to be rolled. The material to be rolled is supported in front of the rolling direction of the rolling material in the same direction as the rotation direction of the rolling material, and the outer peripheral surface is in contact with the outer surface of the flange of the rolling material. The pair of scissors rolls and the straightening rolls are pivotally supported on rotary tables respectively supported by a pair of left and right scissors roll chock so as to be rotatable about a vertical axis. A universal rolling mill is provided. By rotating the rotary table, the position of the correction roll can be adjusted according to the rolling state of the material to be rolled, so that bending in the left-right direction can be reliably suppressed.

  A backup roll that is rotatably supported in a state in which the outer peripheral surface is in contact with the outer peripheral surface of the straightening roll and that receives a load acting on the straightening roll may be supported by the rotary table.

  The rotary shaft of the saddle roll and the rotary shaft of the rotary table may coincide.

  According to the present invention, the bending of the rolled material in the left-right direction can be reliably suppressed with a simple structure according to the situation during rolling. Moreover, since the correction | amendment roll which rotates in the same direction as a wrinkle roll is made to contact a flange and a curvature is corrected, wrinkles are not generated in a material to be rolled.

It is a perspective view which shows the outline of the rolling part of the universal rolling mill concerning this invention. It is a top view of the universal rolling mill of FIG. It is the longitudinal cross-sectional view cut | disconnected by the AA line of FIG. FIG. 3 is a plan view when the rotary table 15 of FIG. 2 is rotated. It is a top view which shows different embodiment of the universal rolling mill of this invention. It is a top view when rotating the rotary tables 15 and 16 of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present specification and drawings, elements having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 shows an outline of a universal rolling mill according to the present invention. The rolling mill 1 is composed of a pair of upper and lower horizontal rolls 2 and 3 and a pair of left and right saddle rolls 4 and 5, for example, H-shaped steel or I as shown. The material 6 to be rolled, such as a shape steel, having a flange is rolled while being conveyed in the longitudinal direction.

  The pair of upper and lower horizontal rolls 2 and 3 are rolled with the upper surface and the lower surface of the material to be rolled 6 interposed therebetween to form an H-shaped steel web 6w. The horizontal rolls 2 and 3 rotate around drive shafts 2a and 3a that are orthogonal to the rolling direction of the material 6 and extend in the horizontal direction. The drive shafts 2a and 3a are supported by a horizontal roll chock (not shown).

  The pair of left and right saddle rolls 4 and 5 are rolled across the left and right sides of the material 6 to be rolled, and together with the side surfaces of the horizontal rolls 2 and 3, a flange 6f of H-shaped steel is formed. The scissors rolls 4 and 5 rotate around vertical rotation axes 4a and 5a, respectively. The horizontal rolls 2 and 3 and the heel rolls 4 and 5 rotate in the direction in which the material to be rolled 6 is fed from the entry side to the exit side.

  Straightening rolls 9 and 10 that rotate in the same direction as the rolls 4 and 5 are provided in front of the pair of right and left rolls 4 and 5 in the rolling direction of the material 6 to be rolled. The correction rolls 9 and 10 are provided as close as possible to the heel rolls 4 and 5 so as not to contact the heel rolls 4 and 5. The rotation shafts 9a and 10a of the correction rolls 9 and 10 extend in the vertical direction. The outer peripheral surfaces of the correction rolls 9 and 10 are in contact with the side surface that is the outer side of the flange 6f of the material to be rolled 6 that has been rolled and sent out. That is, in the normal state, as shown in FIG. 2, the distance between the closest positions of the outer peripheral surfaces of the pair of left and right heel rolls 4 and 5 and the closest position of the outer peripheral surfaces of the pair of left and right correction rolls 9 and 10 It is equal to the interval, and this is the width of the shape steel to be rolled. The pair of right and left straightening rolls 9 and 10 rotate in the rolling direction while being in contact with the side surface of the material 6 to be rolled, so that the material 6 to be rolled is sent out without bending in the left and right direction.

  Further, in the embodiment shown in FIG. 2, backup rolls 11, 12, 13, and 14 are provided in which the respective heel rolls 4 and 5 are in contact with the outer peripheral surfaces. The backup rolls 11, 12, 13, and 14 are provided on the side opposite to the material to be rolled 6 with respect to the rolls 4 and 5. The backup rolls 11, 12, 13, 14 bear the pressure load that the rolls 4 and 5 receive from the material 6 to be rolled, thereby preventing the rolls 4 and 5 and their rotating shafts 4a and 5a from being bent. Therefore, the backup rolls 11, 12, 13, and 14 are preferably larger and rigid than the rolls 4 and 5, and the two adjacent backup rolls 11 and 12, 13 and 14 are not in contact with each other. It is provided so as not to inhibit rotation. In the example of FIG. 2, the backup rolls 12 and 14 on the front side in the rolling direction of the material 6 to be rolled are in contact with the outer peripheral surfaces of the correction rolls 9 and 10, respectively, and receive a load acting on the correction rolls 9 and 10. In FIG. 2, the backup rolls 11 to 14 have the same diameter, but the size and number of backup rolls are not limited to the example shown in FIG. For example, a backup roll that receives the load of the saddle rolls 4 and 5 and a backup roll that receives the load of the straightening rolls 9 and 10 may be provided separately.

  As shown in FIG. 3, the rotary shafts of the above-described saddle roll 4, straightening roll 9, and backup rolls 11 and 12 are pivotally supported on a rotary table 15. Further, the rotary table 15 is pivotally supported by the roll roll chock 7 and has a rotating mechanism for rotating the rotary table 15, for example, a worm gear 17, so that the rotary table 15 is rotatably provided around a vertical axis 15 a. Yes. Similarly, the rotary shafts of the reed roll 5, the straightening roll 10, and the backup rolls 13 and 14 are also supported by a rotary table 16 that is supported by the reed roll chock 8.

  When rolling the material to be rolled 6 using the universal rolling mill 1 having the above configuration, the material to be rolled 6 is carried into the entry side of the rolling mill 1, and a pair of upper and lower horizontal rolls 2, 3 and a pair of left and right A predetermined shape steel is formed by rolling with rolls 4 and 5. And the to-be-rolled material 6 after rolling is guide | induced to the straight direction by the correction | amendment rolls 9 and 10, the bending of the left-right direction is corrected, and it sends out from the exit side of the rolling mill 1.

  At this time, the straightening rolls 9 and 10 are disposed in front of the rolling material 6 in the rolling direction with respect to the rolls 4 and 5 and are rotated in the same rotational direction as the rolling rolls 4 and 5. Without causing wrinkles in the material 6, it can be guided in a straight direction while suppressing bending in the left-right direction.

  Furthermore, in the present invention, since the heel rolls 4 and 5 and the correction rolls 9 and 10 are provided on the rotary tables 15 and 16, the positions of the correction rolls 9 and 10 can be adjusted in the left-right direction. The rotating mechanism such as the worm gear 17 of the rotating tables 15 and 16 is connected to an operating mechanism (not shown). For example, the rotating tables 15 and 16 are automatically or manually operated by the control device when they are deviated by a certain value in the left-right direction. Rotate. By rotating the rotary tables 15 and 16, the positions of the correction rolls 9 and 10 with respect to the material 6 to be rolled change. For example, as shown in FIG. 4, when the rotary table 15 on the right side in the rolling direction of the material to be rolled 6 is slightly rotated counterclockwise, the correction roll 9 moves to the left in the rolling direction rather than the heel roll 4. Therefore, when the material 6 to be rolled tends to be bent to the right along with rolling, the material to be rolled 6 is pushed leftward by operating the rotary table 15 in this direction to correct the bending. The operations of the turntables 15 and 16 can correct the bending by rotating only one or both of the left and right according to the condition of the material 6 to be rolled.

  2 is different from the positions of the shafts 15a and 16a of the rotary tables 15 and 16 and the positions of the rotary shafts 4a and 5a of the saddle rolls 4 and 5, the rotary tables 15 and 16 are rotated. As a result, the positions of the scissors rolls 4 and 5 also move. On the other hand, FIG. 5 is an example in which the shaft 15a of the rotary table 15 and the rotary shaft 4a of the reed roll 4 and the shaft 16a of the rotary table 16 and the rotary shaft 5a of the reed roll 5 are set at the same position. In this case, for example, when the rotary tables 15 and 16 are rotated as shown in FIG. 6, only the positions of the correction rolls 9 and 10 are changed while the positions of the eaves rolls 4 and 5 are fixed.

  As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this example. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to. For example, the backup roll is not essential in the configuration of the present invention, and may not be provided at all, or only the backup roll that bears the load of the correction roll may be provided.

  The present invention can be applied to a rolling mill that rolls steel and other materials to be rolled.

DESCRIPTION OF SYMBOLS 1 Universal rolling mill 2, 3 Horizontal roll 2a, 3a Drive shaft 4, 5 Roll roll 4a, 5a Rotating shaft 6 Rolled material 7, 8 Roll roll chock 9, 10 Straightening roll 9a, 10a Rotating shaft 11, 12, 13, 14 Backup roll 15, 16 Rotary table 15a, 16a Shaft 17 Worm gear

Claims (3)

A universal rolling mill that has a pair of upper and lower horizontal rolls and a pair of left and right saddle rolls, and forms a shaped steel having a flange by rolling a material to be rolled,
The roll is supported forward of the pair of rolls in the rolling direction of the material to be rolled in the same direction as the rotation direction of the rolls, and the outer peripheral surface is in contact with the outer surface of the flange of the rolls. Equipped with a straightening roll to correct the bending of the rolled material in the left-right direction,
The universal rolling mill, wherein the pair of reed rolls and the straightening roll are pivotally supported on a rotary table respectively supported by a pair of left and right reed roll chocks so as to be rotatable about a vertical axis.   The back-up roll receiving a load acting on the straightening roll is supported by the rotary table so as to be rotatable in a state in which the outer peripheral face is in contact with the outer peripheral face of the straightening roll. Universal rolling mill as described.   3. The universal rolling mill according to claim 1, wherein a rotation axis of the reed roll coincides with a rotation axis of the turntable.

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