JP2018153855A - H-type steel finish universal rolling machine comprising barrel width variable horizontal roll with web restriction roller, and finish universal rolling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably manufacture an H-type steel product of specially high web center positional precision which avoids a collapse of the attitude of the rolling workpiece upstream of the center axis of a barrel width variable horizontal roll, and is capable of being shared by H-type steel sizes of different flange widths to undergo no influence of fluctuations in flange width, and to keep no risk of a material-through failure such as surface flaw or guide jamming.SOLUTION: A finish universal rolling machine comprises a pair of upper and lower barrel width variable horizontal rolls that make a rolling workpiece of an H-type intermediate material molded by rolling through intermediate rolling and correct a flange inclined outside an H-type intermediate material to mold an H-type steel product by rolling, where the barrel width variable horizontal rolls are composed of a pair of right and left split rolls, a pair of web restriction rolls that restrict an H-type intermediate member or an H-type steel product web in a space formed between the right and left spit rolls, and a pair of upper and lower inner eccentric sleeves provided in the web restriction rolls to be capable of turning on the outer periphery of spindles of a pair of upper and lower barrel width variable horizontal rolls.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a finishing universal rolling mill for H-section steel and a finishing universal rolling method for H-section steel using the finishing universal rolling mill. Finishing universal rolling mill provided with a horizontal roll whose body width is divided into left and right to correct the inclination and form an H-shaped steel product, and finishing of H-section steel using the finishing universal rolling mill It relates to the universal rolling method.

At present, the H-section steel produced by rolling is characterized by an extremely large number of sizes in accordance with diversification of customer needs. As shown in FIG. 8, the cross section of the H-shaped steel product 80 is composed of a web 81 and flanges 82 and 83 on both sides of the web 81, and not only the plate thickness dimensions h _w and h _{f of} the web 81 and the flanges 82 and 83 Method H (web width dimension indicated by (web height A-2 × flange thickness h _f )), flange piece width F ((flange width B−web thickness h _w ) / 2) Various products with different sizes are manufactured. Of these, in order to produce various H-section steels with different web inner methods H with high efficiency without recombining the rolling rolls, universal finish rolling with a barrel width variable horizontal roll with the barrel section divided into left and right A machine (hereinafter simply referred to as a finishing universal rolling mill) is used.

  For manufacturing the H-section steel, a manufacturing facility as shown in FIG. 9 is used. A material 10 such as a slab extracted from the heating furnace 1 is formed into a dog-bone-shaped H-shaped rough material 11 by a roughing mill 2, and a web of the H-shaped rough shape material 11 is formed by a first intermediate universal rolling mill 3. The thickness of the flange is reduced, and at the same time, the first edger rolling mill 4 close to the first intermediate universal rolling mill 3 performs width reduction and forging and shaping of the flange of the H-shaped rough profile 11. The H-shaped intermediate material 12 is formed. The H-shaped intermediate material 12 is reduced in sheet thickness and flange width by the second intermediate universal rolling mill 5 and the second edger rolling mill 6 adjacent to the second intermediate universal rolling mill 5, and the H-shaped intermediate material 13 is shaped. Is done. Next, the H-shaped intermediate material 13 is widened to various predetermined dimensions corresponding to the product by an oblique roll rolling machine (skew roll rolling machine) 7 to become an H-shaped intermediate material 14. Finally, finish universal rolling is performed by the finish universal rolling machine 8 set to a body width dimension adapted to the in-web dimension of the H-shaped intermediate material 14, and the H-shaped steel product 80 is formed. In manufacturing the H-shaped steel, the skew roll mill (skew roll mill) 7 may not be used. In this case, the body width dimension of the finishing universal rolling mill 8 is set to the H-shaped intermediate material. Finish universal rolling in conformity with 13 internal web dimensions.

  Further, rolling is performed to reduce or enlarge the web height using the finishing universal rolling mill 8, and in this case, the cylinder width dimension of the cylinder width variable horizontal roll is set to the in-web method of the H-shaped intermediate material 13 or 14. Finishing universal rolling is performed by setting smaller or larger than the dimension.

  By the way, in the finishing universal rolling, while the H-shaped intermediate material 13 or 14 passes through a roll gap formed by a pair of upper and lower body width variable horizontal rolls and a pair of left and right saddle rolls incorporated in the finishing universal rolling mill 8. The flange inclined to the outside of the H-shaped intermediate material 13 or 14 is corrected to an inclination angle of 0, and the H-shaped steel product 80 is formed. At this time, the sheet thickness reduction amount of the H-shaped intermediate material 13 or 14 with respect to the web is almost 0 or very small. Therefore, the finish universal rolling of the H-section steel using the finish universal rolling mill 8 is very unstable. is there. The reason for this will be described in detail below. In the following, for the sake of convenience of explanation, in finish universal rolling, the H-shaped intermediate material 13 or 14 on the entry side of the finish universal rolling mill 8, the material in the roll bite of the finish universal rolling mill 8, and the H on the exit side The shaped steel product 80 is collectively referred to as “rolled material”.

  FIG. 10 shows a state of finish universal rolling by the finish universal rolling mill 8, a side view thereof is shown in (b), and a cross section EE in the side view is shown in (a). The material 70 to be rolled advances from the left to the right through the gap formed by the horizontal rolls 50 and 51 and the rolls 30 and 31 and passes through the H-shaped steel product from the cross section of the H-shaped intermediate material 13 or 14. It is processed into 80 cross sections. That is, the flanges 72 and 73 of the material 70 to be rolled are corrected from the shape inclined outward and become a shape without inclination. More specifically, in FIG. 10, the cross section of the material 70 to be rolled is the cross section of the H-shaped intermediate material 13 or 14 in the upstream cross section AA, but the shape of the flanges 72 and 73 is corrected in the cross section BB. Starts, and the correction is completed at a cross section CC, which is a plane passing through the central axis of the trunk width variable horizontal rolls 50, 51 and the collar rolls 30, 31. And in the downstream area from the cross-section CC, the body width variable horizontal rolls 50 and 51 and the heel rolls 30 and 31 are separated from the material 70 to be rolled, and any cross-section in the downstream area, for example, the material 70 to be rolled in the cross-section DD. The cross section is the cross section of the H-shaped steel product 80.

  Geometrical position of the material 70 and the roll (that is, the variable body width horizontal rolls 50 and 51 and the saddle rolls 30 and 31) in the cross section AA, the cross section BB, the cross section CC, and the cross section DD. The relationship is shown in FIG. 11A shows a cross section AA, FIG. 11B shows a cross section BB, FIG. 11C shows a cross section CC, and FIG. 11D shows a cross section of the material to be rolled and the roll in the section DD.

First, with respect to the body width variable horizontal rolls 50 and 51, the peripheral surfaces of the upper horizontal roll 50 and the lower horizontal roll 51 from the upstream section AA to the section CC directly below the roll axis via the section BB. gap between, so-called vertical horizontal roll gap gradually decreases as _{g h1 → g h2 → g h} , after reaching the minimum value _{g h} in section C-C, it will cross D-D in _{g h3} started to increase . Here, the body width variable horizontal rolls 50 and 51 are divided into left and right bodies in order to provide a function of varying the body width. That is, the upper roll 50 is divided into a left roll 50-1 and a right roll 50-2, and a lower roll 51. Is divided into a left roll 51-1 and a right roll 51-2, and there is a gap between the left and right rolls. Therefore, plate thickness reduction cannot be applied to the central portion of the width of the web 71 of the material 70 to be rolled facing the gap. If plate thickness reduction is applied, a step is generated between the width center portion of the web 71 and the other portions, resulting in a defective product. Accordingly, the position of Dohaba variable horizontal rolls 50 and 51, upper and lower horizontal rolls gap g _h in the cross section C-C is set to be equal to the web thickness h _w of the rolled material 70. Vertical horizontal roll gap from taking the minimum value g _h in section C-C, it can be seen Dohaba variable horizontal rolls 50 and 51 to abut the web 71 is only one place of the cross-section C-C.

Next, with respect to the saddle rolls 30 and 31, from the upstream cross section AA to the cross section CC through the cross section BB, the side surfaces of the trunk width variable horizontal rolls 50 and 51 and the periphery of the saddle rolls 30 and 31 The gap between the faces, the so-called wrinkle roll gap, decreases from g _v1 → g _v2 → g _v , reaches the minimum value g _v in the section CC, then increases and _changes to g _v3 in the section DD. Become. The positions of the scissors rolls 30 and 31 are set so that the scissor roll gap g _v in the section C-C is equal to the flange thickness h _f of the material 70 to be rolled, or a value slightly smaller than the h _f value. The And the rolling rolls 30 and 31 contact the both ends of the outer surfaces of the flanges 72 and 73 of the material 70 to be rolled in the section B-B, and then reduce the winding roll gap 72 until the section C-C. , 73 is pressed, the thickness of the flanges 72, 73 is sandwiched between the side surfaces of the variable width rolls 50, 51, and pressure is applied to remove the inclination of the flanges.

  While pressing of the outer surfaces of the flanges 72 and 73 of the material 70 to be rolled by the rolls 30 and 31 continues continuously from the cross section BB to the cross section CC, the material 70 to be rolled by the upper and lower rolls 50 and 51 is used. Since the press or restraint of the web 71 is only at one location on the cross section CC, the orientation of the material 70 to be rolled becomes unstable in finish universal rolling, and in particular, the problem of web center misalignment, warping and twisting which will be described later. It is easy to produce. This will be described with reference to FIG. In FIG. 12, (a), (b), (c), and (d) correspond to FIG. 11, respectively, along the sections AA, BB, CC, and DD of FIG. 10. The cross-sectional shape of the to-be-rolled material 70 and a roll in is shown.

  In finish universal rolling, since the web 71 is in an unconstrained state in a cross section other than the cross section CC immediately below the roll axis, the web 71 is twisted as shown in FIGS. 12 (a) and 12 (b). The posture of the material 70 tends to collapse, and there is a risk that finish universal rolling may proceed with the collapsed posture. First, the posture of the material 70 to be rolled tends to become unstable at the cross section BB in FIG. 12B where the rolls 30 and 31 and the flanges 72 and 73 start to come into contact with each other. This is due to the fact that the upper and lower surfaces of the web 71 are compressed by the heel rolls 30 and 31 from the left and right in a state where the upper and lower surfaces of the web 71 are not sandwiched between the trunk width variable horizontal rolls 50 and 51. In connection with this, the position which influences also to the site | part located before and behind the longitudinal direction site | part of the to-be-rolled material 70 in the cross section BB, for example, the to-be-rolled material 70 of the cross section AA of FIG. If it collapses and it moves downstream, the posture will be greatly collapsed by the compression of the scissors rolls 30 and 31 in the cross section BB. When rolling proceeds with the posture of the material 70 to be rolled having a cross section B-B collapsed, as shown in FIGS. 12C and 12D, the center deviations s1 and s2 of the web 71 (the thickness center line of the web 71). Shift amount of the plate width center line of the flange 72 or 73 with respect to the flange 72 or 73, and the flanges 72 and 73 are formed in an asymmetric shape. Further, as shown in FIG. 12D, warpage C tends to occur on the exit side. In addition, a twist in which the value of the warp C is different between right and left also occurs.

  Various techniques such as Patent Documents 1 to 3 shown below have been disclosed for the above problems.

  For example, in Patent Document 1, as shown in FIGS. 12A and 12B, “the center position in the width direction of the flange of the H-shaped intermediate member 13 or 14 is from the center (pass line) of the roll gap of the horizontal roll. A method of performing universal rolling that "rolls at least one of the width end portions of each flange of the rough steel slab (corresponding to the H-shaped intermediate material 13 or 14)" is disclosed so that the rolling is not performed in a state of being detached. Has been. Then, as a constraining procedure for the width end portion of the flange, for example, “grooved vertical rolls (coffin rolls)” 30 and 31 as shown in FIG. 13A and “grooved rolls” as shown in FIG. “Horizontal rolls” 50 and 51, or “penetration guides” 64 as shown in FIG. 13 (c), etc. are considered, and “penetration guides are used in that they can also be used for rolling several types of H-section steel and suppress the increase in equipment costs. Is particularly advantageous. "

  Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique that can perform roll replacement and web guide width change without attaching or detaching the web guide. According to the web guide 65 as shown in FIG. 14, since the position of the web of the material to be rolled is determined, a web center deviation defect or the like is suppressed.

  Further, Patent Document 3 describes an output that is effective in reducing the vertical bending (warping and twisting) of the front and rear ends of the material 70 to be rolled, which is installed in the vicinity of the exit side of the finishing universal rolling mill as shown in FIG. A bend straightening device 66 is disclosed. A plurality of rolled material wrapping prevention guides 67 for restraining each of both sides of the web 71 of the rolled material 70 independently from above and below are supported by the bent straightening device 66 so as to be movable up and down and left and right. A rotatable end surface roller 68 that presses the end surfaces of the flanges 72 and 73 of the material 70 is provided in each of the rolling material winding prevention guides 67 so as to be movable up and down. The rolling material winding prevention guide 67 restrains both sides of the web 71 from above and below at a predetermined position corresponding to the thickness and width of the web 71 of the material 70 to be rolled. Further, the end surface roller 68 is set at an interval equal to the width of the flanges 72 and 73 of the material 70 to be rolled, and warping and twisting are corrected by adjusting the position of the end surface roller 68 in the vertical direction.

Japanese Patent Laid-Open No. 3-27801 Japanese Patent No. 3362832 Japanese Patent No. 3424148

  However, as described in Patent Document 1, the “grooved scissors rolls” 30 and 31 in FIG. 13A and the “grooved horizontal rolls” 50 and 51 in FIG. , 73 when used as a means for restraining the width end portion, it is possible to share the grooved saddle rolls 30 and 31 and the body width variable horizontal rolls 50 and 51 between the sizes of H-section steels having different flange widths. Can not. In addition, even if the flange width of the H-shaped steel product 80 is the same, in actual operation, the material 70 (H-shaped intermediate material 13 or 14) has some variation in the flange width in the length direction. Usually, a difference in flange width occurs between different materials to be rolled due to the difference in rolling and the variation in rolling temperature. For this reason, the flange end of the flange is insufficiently constrained with respect to a section with a small flange width, and the occurrence of web center deviation failure cannot be suppressed. There is a risk of protruding from the groove and causing surface flaws.

  The penetration guide 64 extends over the long distances in the rolling direction of the cross sections AA, BB, CC, and DD in FIG. 10, as shown in FIG. The width end portion is constrained so that the width center of the flanges 72 and 73 is not removed from the center of the gap between the body width variable horizontal rolls 50 and 51. However, when the penetrating guide 64 is used as a restraining means for the width ends of the flanges 72 and 73, the penetrating guide 64 is always stationary. Therefore, the leading end of the flange 72 or 73 of the material 70 to be rolled and the penetrating guide 64 The sliding friction between them is severe, and the front ends of the flanges 72 and 73 receive a large frictional force from the penetration guide 64. As a result, at the leading ends of the flanges 72 and 73 of the material 70 to be rolled, a scratch is generated due to friction with the penetration guide, or the material 70 to be rolled cannot move in the space between the upper and lower guides (guide clogging). The problem that the material 70 to be rolled does not bite into the finishing universal rolling mill 8 often occurs. Further, it is difficult to cope with the flange width variation in the length direction of the material 70 to be rolled and the flange width difference between different materials to be rolled, and the width end portion of the flange becomes insufficiently constrained with respect to a section having a small flange width. Therefore, the occurrence of web center deviation failure cannot be suppressed, and conversely, guide clogging is likely to occur on a cross section having a large flange width.

Further, in the technique described in Patent Document 2, since the web guide 65 as shown in FIG. 14 sandwiches the web 71 of the material 70 from above and below to determine the position of the material 70, a web center deviation defect occurs. It becomes difficult to do. However, the web guide 65 is always stationary, the sliding friction between the web 71 of the material 70 to be rolled and the web guide 65 is severe, and the web 71 receives a large frictional force from the web guide 65. As a result, the surface of the web 71 of the material to be rolled is clogged due to friction with the web guide 65 or clogged in a narrow space between the upper and lower web guides, and the material 70 to be rolled is finished universally rolled. The problem of not being bitten by the machine 8 often occurs. To solve this problem, there is only to inevitably enlarge the vertical web guide gap g _s, therefore restraining becomes loose with respect to the web 71 of material to be rolled 70 by web guide 65, so that the web center deviation failure occurs .

  Further, the technique described in Patent Document 3 can reduce bending and twisting of the front and rear end portions of the material 70 to be rolled. In this case, the end face roller 68 is set at an interval equal to the width of the flanges 72 and 73 of the material 70 to be rolled, but the front and rear ends of the material 70 are in the unsteady region of the rolling, so Is likely to fluctuate, and the pressing state of each flange end face of the material 70 to be rolled by the end face roller 68 may fluctuate, and the tips of the flanges 72 and 73 tend to be crushed, and the correction of warping and twisting tends to be incomplete. . Further, although the end surface roller 68 is installed in the vicinity of the exit side of the finishing universal rolling mill, the distance S between the end surface roller 68 and the roll axis O of the horizontal rolls 50, 51 is equal to that of the horizontal rolls 50, 51. Although it depends on the diameter, it is a fairly large value around 1000 millimeters. In order to correct the warp and torsion occurring in the short range of the front and rear end portions, it is necessary that the S value is small, and in some cases, the correction of the warp and twist in the short range in the length direction of the material 70 to be rolled cannot be dealt with. Further, when the leading end T of the material 70 to be rolled enters the gap between the rolling material wrapping prevention guide 67, there is a risk of entering the gap P between the horizontal rolls 50 and 51 and causing clogging of the guide. There is a problem with material permeability.

  In view of the above circumstances, an object of the present invention is to form an H-shaped steel product by correcting a flange inclined to the outside of the material to be rolled using an H-shaped intermediate material as a material to be rolled in finish universal rolling of H-shaped steel. At the time, the posture of the material to be rolled can be prevented from collapsing upstream of the center axis of the horizontal roll with variable width of the roll, and can be shared between the sizes of H-section steels having different flange widths. Roll width variable horizontal roll that can stably produce H-shaped steel products with high accuracy in the center position of the web, which are not subject to damage, and there is no risk of material failure such as surface flaws and guide clogging. A finishing universal rolling mill for H-section steel and a finishing universal rolling method are provided.

  In addition, it is possible to effectively correct the warp and twist of the material to be rolled in the downstream very close to the center axis of the horizontal roll with variable width of the roll, and to share between the sizes of H-section steels having different flange widths. To provide a finishing universal rolling mill for H-section steel and a finishing universal rolling method provided with a horizontal roll having a variable body width which is not affected and does not cause a threading failure such as surface flaws and guide clogging. .

  In order to achieve the above-described object, according to the present invention, an H-shaped intermediate product rolled and shaped by intermediate rolling is used as a material to be rolled, and a flange inclined to the outside of the H-shaped intermediate material is corrected to form an H-shaped steel product. A universal rolling mill having a pair of upper and lower body width variable horizontal rolls for rolling and shaping, wherein the body width variable horizontal roll is composed of left and right split rolls, and is formed in a space formed between the left and right split rolls. In addition, a pair of upper and lower web restraining rollers for restraining the web of the H-shaped intermediate material or the H-shaped steel product, and rotation on the outer periphery of the main shaft of the upper and lower pair of the body width variable horizontal roll inside the web restraining roller. A finishing universal rolling mill is provided, comprising a pair of upper and lower eccentric sleeves provided freely.

  In the space formed between the left and right split rolls, between the outer periphery of the main shaft of the trunk width variable horizontal roll and the inner periphery of the eccentric sleeve is on the outer periphery of the main shaft of the trunk width variable horizontal roll. An upper and lower pair of base sleeves that are slidable in the axial direction and that rotates together with the main shaft may be provided.

  The pair of upper and lower web restraining rollers may be divided into left and right web restraining roller portions adjacent to the left and right split rolls in a space formed between the left and right split rolls.

  Further, according to the present invention, in the finishing universal rolling method using the finishing universal rolling mill described above, based on the adjustment of the phase angle of the eccentric sleeve, the web restraining roller is disposed at a predetermined position, There is provided a finishing universal rolling method characterized by rolling and shaping an H-shaped steel product from an H-shaped intermediate material.

  The center axis of the web restraining roller is positioned upstream from the center axis of the waist width variable horizontal roll, and the center of the gap between the upper and lower pairs of the web restraining roller is set in the vertical direction with the center of the gap between the upper and lower pairs of the waist width variable horizontal roll. It may be set to match.

  The center axis of the web restraining roller is positioned upstream from the center axis of the trunk width variable horizontal roll, and the upper and lower pair of gap centers of the web restraining roller is set to the upper and lower pair of gap centers of the trunk width variable horizontal roll. It may be set by shifting in the vertical direction.

  The center axis of the web restraining roller is positioned downstream from the center axis of the waist width variable horizontal roll, and the center of the gap between the upper and lower pairs of the web restraining roller and the center of the gap between the upper and lower pairs of the waist width variable horizontal roll. It may be set to match.

  The center axis of the web restraining roller is positioned downstream from the center axis of the trunk width variable horizontal roll, and the upper and lower pair of gap centers of the web restraining roller is set to the upper and lower pair of gap centers of the trunk width variable horizontal roll. It may be set by shifting in the vertical direction.

  The gap value between the upper and lower pairs of the web restraining rollers may be set to be equal to the web thickness value of the H-shaped intermediate material or the H-shaped steel product.

  The rolling shaping may be performed with the phase angle of the eccentric sleeve being constant and the position of the web restraining roller being fixed during the period from the biting of the H-shaped intermediate material into the finishing universal rolling mill to the kicking out. .

  The rolling shaping may be performed by adjusting the phase angle of the eccentric sleeve and changing the position of the web restraining roller during the period from the biting of the H-shaped intermediate material into the finishing universal rolling mill to the kicking out. .

  Rolling shaping was performed by causing the finishing universal rolling mill to bite the leading end of the H-shaped intermediate material in a state where the central axis of the web restraining roller was positioned downstream of the central axis of the body width variable horizontal roll. After that, the central axis of the web restraining roller is moved so as to be located upstream from the central axis of the variable barrel width horizontal roll, and the rear end portion of the H-shaped intermediate material is kicked out of the finishing universal rolling mill. Also good.

  According to the present invention, in finishing universal rolling of H-section steel, when the H-shaped steel product is formed by correcting the flange inclined to the outside of the rolled material using the H-shaped intermediate material as the rolled material, the body width is variable. It avoids the collapse of the orientation of the material to be rolled upstream from the central axis of the horizontal roll, and can be shared between the sizes of H-section steels with different flange widths, and is not affected by flange width fluctuations or flange width differences. In addition, it is possible to stably manufacture an H-shaped steel product having particularly high web center position accuracy, which does not cause a threading failure such as surface flaws and guide clogging.

  In addition, it is possible to effectively correct the warp and twist of the material to be rolled in the downstream very close to the center axis of the horizontal roll with variable width of the roll, and to share between the sizes of H-section steels having different flange widths. It is possible to perform finish universal rolling that is not affected and that does not cause a failure of threading such as surface flaws or clogged guides.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic explanatory drawing which shows the finishing universal rolling mill which concerns on the 1st Embodiment of this invention, (a) shows the state which the web restraint roller restrained the web of the to-be-rolled material prior to the trunk width variable horizontal roll. A front view, (b) is a front view which shows the state which the roll width variable horizontal roll restrained the web of the material to be rolled, (c) is a side view. It is a schematic explanatory drawing about the finishing universal rolling mill which concerns on the 2nd Embodiment of this invention. It is a schematic explanatory drawing about the finishing universal rolling mill which concerns on the 3rd Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic explanatory drawing which shows the finishing universal rolling mill which concerns on the 1st Embodiment of this invention, (a) is a front view which shows the state which restrained the web of the material to be rolled by the cylinder width variable horizontal roll, (b). These are the front views which show the state which the web restraint roller restrained the web of the to-be-rolled material, (c) is a side view. It is explanatory drawing regarding the application method of the web constraining roller for reducing the web center deviation of H-shaped steel products, and raising a web center position precision. It is explanatory drawing regarding the application method of the web constraining roller for suppressing the curvature and twist of the front-and-rear end part of H-shaped steel products. For the finishing universal rolling mill according to the present invention technique, when the horizontal roll diameter is reduced by cutting or the like, the web restraining roller L is reduced by the amount of reduction of the horizontal roll diameter, thereby making the web restraining position L of the web restraining roller constant. It is explanatory drawing which shows that it can maintain at a value. It is explanatory drawing which shows the cross section of H-section steel products. It is explanatory drawing which shows the process for manufacturing H-section steel from a raw material. It is a schematic explanatory drawing which shows the condition of the finish universal rolling of H-section steel, (a) is a schematic plan view, (b) is a schematic side view. It is the schematic sectional drawing which looked at the mode of the material to be rolled by the conventional finishing universal rolling mill from the front, (a) before the start of rolling, (b) at the start of rolling, (c) at the end of rolling, (D) has shown after exiting a finishing universal rolling mill. It is a schematic explanatory drawing of the problem which arises because the web part is unconstrained in the conventional finishing universal rolling mill, (a) before rolling starts, (b) at the start of rolling, (c) is rolled. At the end, (d) shows after exiting the finishing universal rolling mill. It is the prior art for preventing the shape defect of the to-be-rolled material in a finishing universal rolling mill, (a) is a grooved vertical roll (roller roll), (b) is a grooved horizontal roll, (c) is a penetration guide. FIG. It is a prior art for preventing the shape defect of the to-be-rolled material in a finishing universal rolling mill, and is a schematic side view which shows a web guide. It is the schematic which shows the curvature correction apparatus which is a prior art for reducing the curvature of the to-be-rolled material in the finishing universal rolling mill delivery side, and a twist, (a) is a side view, (b) is a front view.

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

(First embodiment of the present invention)
FIG.1 and FIG.4 is schematic explanatory drawing of the finishing universal rolling mill for H-section steel provided with the cylinder width variable horizontal roll with a web constraining roller concerning the 1st Embodiment of this invention. Finishing universal rolling mills equipped with a variable body width horizontal roll are known in many documents including Patent Document 1 and are composed of variable width cylinder horizontal rolls 50 and 51 and saddle rolls 30 and 31. The upper roll 50 of the body width variable horizontal rolls 50, 51 is from left and right split rolls 50-1, 50-2 having a thickness a, and the lower roll 51 is from left and right split rolls 51-1, 51-2 having a thickness a. By configuring each divided roll along the horizontal roll axis O, it is possible to freely set its body width W inline correspondingly to the in-web method H of the H-section steel product 80. .

The core of the technology of the present invention is a horizontal roll shaft on a cross-section YY as shown in FIG. 1 (c) or FIG. The web constraining rollers 60 and 61 centering on the axis P on the cross-section XX at a position separated by L in the upstream or downstream direction of rolling from O are provided. Then, the value of the gap _{g R} of the web restraint roller 60 and 61 is normally set in the thickness _{h w} and equal to or thickness _{h w} value greater than the web 71 of material to be rolled 70. Thereby, the said web restraining rollers 60 and 61 restrain the web 71 of the said rolling material 70 from the upper and lower surfaces on the cross section XX, and prevent that the attitude | position of the rolling material 70 collapse | crumbles like FIG. To do. That is, the web 71 of the material 70 to be rolled is restrained in the vertical direction by the web restraining rollers 60 and 61 and the body width variable horizontal rolls 50 and 51 in two cross sections XX and YY. Thereby, the attitude | position of the to-be-rolled material 70 is stabilized, and web center deviation, a curvature, and a twist can be suppressed.

  Here, the apparatus configuration and method for setting the positions of the web restraining rollers 60 and 61 will be described in detail below with reference to FIG. In the space between the left and right split rolls 50-1, 50-2 and the space between the left and right split rolls 51-1, 51-2 for each of the trunk width variable horizontal rolls 50, 51, Eccentric sleeves 56 and 57 are provided on the outer sides of the main shafts 52 and 53 of the variable width horizontal rolls 50 and 51, respectively, so that they can be set by rotating the outer periphery of the main shafts 52 and 53. In order to perform the rotation smoothly, for example, a bearing 63 is disposed in the circumferential direction between the main shafts 52 and 53 and the eccentric sleeves 56 and 57. The center of the inner circle of the eccentric sleeves 56 and 57 is O, the center of the outer circle is P, and there is a distance of ε between them, and the line segment OP forms an angle θ with respect to the vertical direction. Hereinafter, the angle θ between the length ε of the line segment OP and the vertical direction is referred to as the eccentric amount and the phase angle of the eccentric sleeves 56 and 57, respectively.

  Further, web restraining rollers 60, 61 are rotatably provided on the outer periphery of the eccentric sleeves 56, 57 on the outer sides of the eccentric sleeves 56, 57, so that the eccentric sleeves 56, 57 can rotate smoothly. A bearing 63 is disposed in the circumferential direction between 57 and the web restraining rollers 60 and 61. The web restraining rollers 60 and 61 are not eccentric (the inner circle and the outer circle have the same center), and the center thereof is at the center P of the outer circle of the eccentric sleeves 56 and 57.

式（１）を変形すると以下の式（３）が得られる。

式（２）と式（３）からθを消去すると、以下の式（４）の関係式が得られる。

式（４）の両辺に現れる操業諸元は式（４）の関係式を満たす必要があり、もしこれを満足することができない場合には、例えば水平ロールとウェブ拘束ローラの径差Ｄ_ｈ−Ｄ_Ｒを調整するなどして式（４）を満足するようにできる。 The positions of the web restraining rollers 60 and 61 are set by adjusting the vertical positions of the main shafts 52 and 53 and the phase angle θ, and the upper web restraining roller 60 and the lower web restraining roller 61 sandwich the material 70 to be rolled. They are adjusted mirror-symmetrically or asymmetrically to each other. 1 and 4 show a state adjusted to be mirror-symmetric. As shown in FIG. 1, the diameter of the horizontal roll variable rolls 50, 51 is D _h , the vertical horizontal roll gap is g _h , the diameter of the web restraining rollers 60, 61 is D _R , and the center P of the web restraining rollers 60, 61 is When the horizontal distance from the center O of the barrel width variable horizontal rolls 50 and 51 is L, the upper and lower web restraining roller gap is g _R , the eccentric amount of the eccentric sleeves 56 and 57 is ε, and the phase angle is θ, Equations (1) and (2) hold from the general relationship.

When Expression (1) is modified, the following Expression (3) is obtained.

When θ is eliminated from the equations (2) and (3), the following relational equation (4) is obtained.

The operation specifications appearing on both sides of the formula (4) must satisfy the relational formula of the formula (4). If this cannot be satisfied, for example, the diameter difference D _h − between the horizontal roll and the web restraining roller. such as by adjusting the D _R can be made to satisfy the equation (4).

  In addition, although the appropriate value of L value, ie, the appropriate position of the cross section XX of FIG. 1, changes with the cross-sectional dimension and material of the to-be-rolled material 70, and the diameter of the rolls 30 and 31, it is the flange 72 of the to-be-rolled material 70. It is appropriate to position the web restraining rollers 60 and 61 in the vicinity of the cross section BB in FIG. Moreover, about the appropriate position of the cross section XX of FIG. 4, it changes with the aspect of the curvature of the to-be-rolled material 70, and a twist.

As can be seen from FIG. 1A, in the cross section XX, the flanges 72 and 73 of the material 70 to be rolled are pressed by the rolls 30 and 31, and the web 71 is reduced in width in the horizontal direction. , 61 restrains the web 71 from its upper and lower surfaces and prevents the web 71 from twisting. If the web restraining rollers 60 and 61 are not present, the gap g _h ′ of the cylinder width variable horizontal rolls 50 and 51 is larger than the gap g _h in the cross section YY in the cross section XX, and the web 71 is divided into the split rolls 50 −. 1, 51-1, 50-2, 51-2 and the web 71 may be twisted.

Further, as can be seen from FIG. 1B, the upper and lower gaps g _R ′ of the web restraining rollers 60 and 61 in the section YY are larger than the gap g _R in the section XX. The rollers 60 and 61 cannot restrain the web 71. Instead, the body width variable horizontal rolls 50, 51 restrain the web 71.

  On the other hand, in the case of FIG. 4, after finishing universal rolling of the material 70 with a cross-section YY and correcting the inclination of the flanges 72 and 73 as shown in FIG. As shown in b), the web restraining rollers 60 and 61 restrain the web 71 from the upper and lower surfaces at the cross section XX, preventing the web 71 from being twisted and suppressing warping and twisting.

Incidentally, Dohaba variable horizontal rolls 50, 51 are worn by the rolling of the rolled material 70, gradually the diameter D _h decreases by Aratamekezu each roll chance. Further, although not as much as the body width variable horizontal rolls 50, 51 for the web restraint roller 60 and 61, progressively diameter D _R for polishing a wear surface decreases. However, the diameter _D h for each roll chance, even _{D R} is changed, unless changed sum of diameter difference _D h -D _R and clearance difference _g h -g _R of Dohaba variable horizontal roll and web restraint roller, It is possible to maintain the L value at a constant value. 7A shows a side view when the diameter D _h of the horizontal rolls 50 and 51 is maximum, and FIGS. 7B and 7C show side views when the diameter D _h is minimum. 7 and (a) (b) is _{D h} values are different, therebetween _L, g R, the value of _{g h} are equal. This also horizontal roll diameter decreases to _{D hmin} from _{D hmax,} the web restraining roller diameter from _{D R D R '= D R} - by reducing the _(D hmax _{-D hmin),} the diameter difference _{D h} - by keeping the D _R to be constant, indicating that it is possible to restrain the web 71 of the rolled material 70 of the same size always proper position L by the web restraint rollers 60 and 61. This is also clear from equation (4). FIG. 7 shows a state in which the web restraining rollers 60 and 61 are located in the upstream direction of rolling with respect to the horizontal roll axis O on the cross-section YY, but the same is true even when located in the downstream direction.

As in FIG. 7 (c), without reducing the web restraint roller diameter, for example, if left web restraint roller diameter of the same D _R as FIG. 7 (a), 7 (a) and (c), Although _g R, each value of _{g h} are equal between a position for restraining the web 71 from the upper and lower surfaces in the web restraint roller 60 and 61 are different. That is, in FIG. 7 (a), this position was in the cross section XX separated by L upstream from the cross section YY, but in FIG. 7 (c), X ′ separated by L ′ (= L + ΔL> L). -Move to X '. This is clear from the equation (4). Further, the phase angle of the eccentric sleeves 56 and 57 is the phase angle θ in FIG. 7A, but is larger than θ ′ in FIG. 7C. This is also clear from equation (2). However, although ΔL value depends on the size of the finishing universal rolling mill, it is 20 to 30 mm at the maximum, and depending on the cross-sectional dimension of the material to be rolled, such a variation in L value can be allowed.

(Second embodiment of the present invention)
FIG. 2 is a schematic explanatory diagram of a finishing universal rolling mill according to a second embodiment of the present invention. 2, components having substantially the same functional configuration as those of the first embodiment are denoted by the same reference numerals, and description thereof may be omitted.
The configuration according to the second embodiment shown in FIG. 2 is configured such that the main shafts 52 and 53 rotate between the main shafts 52 and 53 and the eccentric sleeves 56 and 57 of the finishing universal rolling mill shown in FIG. Are provided with base sleeves 54 and 55. 1 differs from the finishing universal rolling mill of FIG. 1 in that eccentric sleeves 56 and 57 are provided on the outer sides of the base sleeves 54 and 55 so that they can be set by rotating on the outer periphery of the base sleeves 54 and 55. In addition, in the said 1st Embodiment shown in FIG. 1, the state which the web restraint rollers 60 and 61 as shown in FIG. 4 are located in the downstream direction of rolling rather than the horizontal roll axis | shaft O on the cross section YY. However, there is a similar state in the second embodiment shown in FIG. 2, and illustration of this state is omitted.

  According to the finishing universal rolling mill according to the second embodiment shown in FIG. 2, the base sleeves 54 and 55 slide in the axial direction on the main shafts 52 and 53 by providing the base sleeves 54 and 55. Therefore, in the space between the left and right split rolls 50-1 and 50-2 and in the space between the left and right split rolls 51-1 and 51-2, the web restraining roller 60, The position of 61 in the left-right direction can be arbitrarily set. As a result, for example, the web restraining rollers 60 and 61 can be positioned at the center of the body width W of the body width variable horizontal rolls 50 and 51, and the left and right symmetry can be maintained. The most effective prevention.

(Third embodiment of the present invention)
FIG. 3 is a schematic explanatory diagram of a finishing universal rolling mill according to a third embodiment of the present invention. 3, components having substantially the same functional configuration as those of the first and second embodiments are denoted by the same reference numerals, and the description thereof may be omitted.

The configuration according to the third embodiment shown in FIG. 3 has the left and right split rolls 50-1, 50-2, and 51-1, 51- with respect to the finishing universal rolling mill having the configuration shown in FIG. Base sleeves 54 and 55 provided so as to rotate together with the main shafts 52 and 53 at two positions adjacent to each other are provided so as to be slidable on the main shafts 52 and 53 in the axial direction. Eccentric sleeves 56 and 57 are provided outside the base sleeves 54 and 55 so that they can be set by rotating on the outer circumferences of the base sleeves 54 and 55, and the web restraining rollers 60 and 61 are provided outside the eccentric sleeves 56 and 57. The outer circumferences of the eccentric sleeves 56 and 57 are rotatably provided.
That is, each of the base sleeves 54 and 55, the eccentric sleeves 56 and 57, and the web restraining rollers 60 and 61 is composed of a left and right base sleeve portion, a left and right eccentric sleeve portion, and a left and right web restraining roller portion. It is the structure provided adjacent to the left and right division | segmentation rolls 50-1, 50-2 and 51-1, 51-2.

  According to the finishing universal rolling mill according to the third embodiment shown in FIG. 3, the restraint of the material to be rolled 70 on the web 71 by the web restraining rollers 60 and 61 is stronger than that of the universal rolling mill of FIGS. 1 and 2. That is, since the position close to the base of the web 71 with the flanges 72 and 73 can be restrained, the web 71 is hardly twisted. By designing the thickness a of each of the divided rolls 50-1, 50-2, 51-1, 51-2 as small as possible, the web restraining rollers 60, 61 can be arranged at positions close to the roots. Thus, the web 71 of the material 70 to be rolled can be restrained.

  In addition, in the said 1st Embodiment shown in FIG. 1, the state which the web restraint rollers 60 and 61 as shown in FIG. 4 are located in the downstream direction of rolling rather than the horizontal roll axis | shaft O on the cross section YY. However, there is a similar state in the third embodiment shown in FIG. 3, and illustration of this state is omitted.

As described above, according to the finishing universal rolling mill according to the present invention described with reference to FIGS. 1 to 4, compared to the conventional configuration, the web restraining roller 60 configured to be freely set by the eccentric sleeves 56 and 57, By providing 61, the movement in the vertical direction of the web is restrained by the web restraining rollers 60, 61 and the body width variable horizontal rolls 50, 51 in the two cross sections, XX and YY. The posture of 70 is stabilized, and web center deviation, warpage or twisting is prevented.
In addition, the roll diameter of Dohaba variable horizontal rolls 50, 51 and the web restraining roller 60 and 61, even when the change (decrease) by roll wear, keeping the diameter difference _D h -D _R constant, The web 71 of the material to be rolled 70 can be restrained at an appropriate position by suitably controlling the position setting of the web restraining rollers 60 and 61 by the eccentric sleeve.

  In particular, according to the finishing universal rolling mill according to the second and third embodiments of the present invention, the base sleeves 54, 55 are provided with the base sleeves 54, 55. 53 can be slid in the axial direction, it is possible to arbitrarily set the positions of the web restraining rollers 60 and 61 in the left-right direction. Therefore, for example, in order to perform finish universal rolling of the H-section steel product 80 having a different in-web method H, it is necessary to change the body width W of the body width variable horizontal rolls 50 and 51, which is convenient in this case. That is, in the second embodiment, even when the cylinder width W changes, the web restraining rollers 60 and 61 can be positioned at the center of the cylinder width W to maintain left-right symmetry, and the attitude of the material 70 to be rolled Can be most effectively prevented. Moreover, in 3rd Embodiment, the web constraining rollers 60 and 61 can always be located close to each division | segmentation roll 50-1, 50-2, 51-1, 51-2, and the to-be-rolled material 70 can be located. Since the position near the base of the web 71 with the flanges 72 and 73 can be restrained, the collapse of the posture of the material 70 to be rolled can be most effectively prevented.

  Hereinafter, a method of applying the web constraining rollers 60 and 61 to finish universal rolling will be described with reference to FIGS. 5 and 6. In order to explain the application method of the web restraint rollers 60 and 61, it is sufficient to illustrate only the trunk width variable horizontal rolls 50 and 51, the heel rolls 30 and 31, the web restraint rollers 60 and 61 and the material 70 to be rolled. Therefore, only these are illustrated and described in FIGS. 5 and 6.

  FIG. 5 is an explanatory diagram regarding an application method of the web restraining rollers 60 and 61 for reducing the web center deviation of the H-shaped steel product 80 and increasing the web center position accuracy. In other words, the central axis of the web restraining roller is positioned upstream of the central axis of the trunk width variable horizontal roll, and (a) is the center of the gap between the upper and lower pairs of the web restraining roller. (B) is a method in which the center of the gap between the upper and lower pairs of the web restraining rollers is shifted in the vertical direction with respect to the gap between the upper and lower pairs of the body width variable horizontal rolls. (C) is a method of shifting the center of the web sheet thickness relative to the center of the gap between the upper and lower pairs of the horizontal rolls of the horizontal roll variable horizontal roll. This is a method in which the amount is different on the left and right, and the amount of forced replacement for the flange at the web thickness center position is different on the left and right.

FIG. 5A shows that the upper web restraining roller 60 and the lower web restraining roller 61 are mirror-symmetrical with respect to the material 70 to be rolled, and the center PL _R of the gap g _R between the web restraining rollers 60, 61. And the center PL _h of the vertical horizontal roll gap g _h are at the same position in the vertical direction. To the web thickness _{h w} of the material to be rolled 70, _{g R} ≧ _h w, a relationship of _{g h} ≒ _{h w.} In this case, the orientation of the material 70 to be rolled is prevented from collapsing as shown in FIG.

FIG. 5 (b) shows the case where the universal finish rolling by setting PL _R as vertical position and PL _h are different, FIG. 5 (b) sets the PL _R higher than PL _h position An example is shown. This is a method applied when the material 70 is biased in the web center and the thickness center position of the web 71 is positioned above the width center position of the flanges 72 and 73. Is shifted downward, the web center deviation of the H-section steel product 80 after finish universal rolling is reduced, and the web center position accuracy is increased. Conversely, if the thickness center position of the web 71 than the width center position of the flanges 72 and 73 of the rolled material 70 is positioned below sets PL _R lower than PL _h position.

FIG. 5C shows the left web restraining rollers 60-1 and 61-1 and the right web when the web sheet thickness center position with respect to the flange width center is different for each of the left flange 72 and the right flange 73 of the material 70 to be rolled. and independently set the vertical position of the PL _R constraining rollers 60-2,61-2, and performs finishing universal rolling. In the example of FIG. 5C, the web plate thickness center is above the flange width center for the left flange 72 of the material 70, and the web plate thickness center is below the flange center for the right flange 73. In some cases, the web center deviation of the H-shaped steel product 80 after finish universal rolling is reduced, and the web center position accuracy is increased.

  FIG. 6 is an explanatory diagram relating to an application method of the web restraining rollers 60 and 61 for suppressing warping and twisting of the front and rear end portions of the H-shaped steel product 80. That is, the center axis of the web restraining roller is positioned downstream from the center axis of the variable waist width horizontal roll, and (a) shows the center of the gap between the upper and lower pairs of the web restraining roller as the center of the gap between the upper and lower pairs of the waist width variable horizontal roll. (B) is a method in which the center of the gap between the upper and lower pairs of the web restraining rollers is shifted in the up and down direction with respect to the center of the upper and lower pairs of the body width variable horizontal rolls. (C) is a method of correcting the warpage or twisting of the web restraint roller, and in particular, the amount of displacement of the center of the upper and lower pairs of web restraining rollers with respect to the center of the gap between the upper and lower pairs of horizontal rolls is set to different values on the left and right. This is a method for correcting large warping and twisting.

FIGS. 6 (a) is to carry out a universal finish rolling by matching the vertical position of the PL _R and PL _h, is a method to apply when warping and twisting of the front and rear end portions is relatively minor. (B) and (c) it performs a universal finish rolling by shifting the vertical position of the PL _R and PL _h. Large warpage or twisting of the H-shaped steel product 80, only to match the vertical position of the PL _R and PL _h, to apply when it is difficult to correct this.

  In the actual operation, the vertical position of the rolled material 70 with respect to the center of the flange width at the web sheet thickness center is not constant in the length direction of the rolled material 70. Further, most of the warp and twist are likely to occur at the front end portion of the material 70 to be rolled, and hardly occur at the rear end portion. Conversely, it is the rear end that is likely to cause web replacement. In view of this, when the finish universal rolling mill bites the material 70 to be rolled (at the time of biting), the central axis of the web restraining roller is downstream from the central axis of the barrel width variable horizontal roll as shown in FIG. In the bar of the material 70 to be rolled, the center axis of the web restraining roller is positioned upstream from the center axis of the horizontal width variable roll as shown in FIG. It is effective to adjust the position of the web restraining roller at. The application method of such a web restraining roller is also within the scope of the present invention.

  As mentioned above, although an example of embodiment of this invention was demonstrated, this invention is not limited to the form of illustration. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood.

  For example, in the “finishing universal rolling” of the H-section steel related to the present invention technique, the inclination of the flange of the material to be rolled is corrected by the finishing universal rolling machine as described above, and the web height of the material to be rolled is adjusted. Including the finish universal rolling that reduces or enlarges, naturally belongs to the category of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a finishing universal rolling mill for H-section steel and a finishing universal rolling method provided with a cylinder width variable horizontal roll with a web restraining roller.

DESCRIPTION OF SYMBOLS 1 ... Heating furnace 2 ... Rough rolling mill 3 ... First intermediate universal rolling mill 4 ... First edger rolling mill 5 ... Second intermediate universal rolling mill 6 ... Second edger rolling mill 7 ... Skew roll rolling mill (skew roll rolling) Machine)
8 ... Finishing universal rolling mill 10 ... Raw material 11 ... H-shaped rough profile 12, 13, 14 ... H-shaped intermediate material 30, 31 ... Finishing universal rolling mill roll 50, 51 ... Finishing universal rolling mill variable width horizontal Rolls 50-1, 50-2 ... left and right split rolls of upper horizontal roll of finishing universal rolling mill 51-1, 51-2 ... left and right split rolls of lower horizontal roll of finishing universal rolling mill 52, 53 ... of finishing universal rolling mill Spindles 54, 55 of the horizontal roll with variable body width 54: Base sleeve 56, 57: Eccentric sleeve of the web restraining roller of the finishing universal rolling mill 60, 61: Web restraining roller 62 of the finishing universal rolling mill ... key 63 ... bearing 64 ... penetration guide 65 ... web guide 66 ... curvature straightening device 67 Rolling material winding prevention guide 68 ... End roller 70 ... Rolled material 71 ... Rolled material web 72, 73 ... Rolled material flange 80 ... H-shaped steel product 81 ... H-shaped steel web 82, 83 ... H-shaped steel Flange

Claims (12)

An H-shaped intermediate material rolled and shaped by intermediate rolling is used as a material to be rolled, and a pair of upper and lower body width-variable horizontal rolls for rolling and shaping an H-shaped steel product by correcting a flange inclined to the outside of the H-shaped intermediate material. Finishing universal rolling mill,
The body width variable horizontal roll is composed of left and right divided rolls,
In a space formed between the left and right split rolls, a pair of upper and lower web restraining rollers for restraining the web of the H-shaped intermediate material or the H-shaped steel product,
A finishing universal rolling mill, comprising: an upper and lower pair of eccentric sleeves rotatably provided on an outer periphery of an upper and lower pair of main shafts of the body width variable horizontal roll inside the web restraining roller. In the space formed between the left and right split rolls,
Between the outer periphery of the main shaft of the trunk width variable horizontal roll and the inner periphery of the eccentric sleeve, it is slidable in the axial direction on the outer periphery of the main shaft of the trunk width variable horizontal roll, and the main shaft The finishing universal rolling mill according to claim 1, wherein upper and lower pairs of base sleeves that rotate together are provided. The upper and lower pairs of the web restraining rollers are divided into left and right web restraining roller portions adjacent to the left and right split rolls in a space formed between the left and right split rolls, respectively. Item 3. The universal rolling mill according to item 1 or 2. A finish universal rolling method using the finish universal rolling mill according to any one of claims 1 to 3,
A finishing universal rolling method characterized in that, based on the adjustment of the phase angle of the eccentric sleeve, the web restraining roller is disposed at a predetermined position, and an H-shaped steel product is rolled from the H-shaped intermediate material. The center axis of the web restraining roller is positioned upstream from the center axis of the waist width variable horizontal roll, and the center of the gap between the upper and lower pairs of the web restraining roller is set in the vertical direction with the center of the gap between the upper and lower pairs of the waist width variable horizontal roll. The finish universal rolling method according to claim 4, wherein the finish universal rolling method is set to match. The center axis of the web restraining roller is positioned upstream from the center axis of the trunk width variable horizontal roll, and the upper and lower pair of gap centers of the web restraining roller is set to the upper and lower pair of gap centers of the trunk width variable horizontal roll. The finishing universal rolling method according to claim 4, wherein the finishing universal rolling method is set by shifting in the vertical direction. The center axis of the web restraining roller is positioned downstream from the center axis of the waist width variable horizontal roll, and the center of the gap between the upper and lower pairs of the web restraining roller and the center of the gap between the upper and lower pairs of the waist width variable horizontal roll. The finish universal rolling method according to claim 4, wherein the finish universal rolling method is set to match. The center axis of the web restraining roller is positioned downstream from the center axis of the trunk width variable horizontal roll, and the upper and lower pair of gap centers of the web restraining roller is set to the upper and lower pair of gap centers of the trunk width variable horizontal roll. The finishing universal rolling method according to claim 4, wherein the finishing universal rolling method is set by shifting in the vertical direction. The gap value between the upper and lower pairs of the web restraining rollers is set to be equal to the web thickness value of the H-shaped intermediate material or the H-shaped steel product, according to any one of claims 4 to 8. Finishing universal rolling method as described. The rolling shaping is performed in a state where the phase angle of the eccentric sleeve is constant and the position of the web restraining roller is fixed during the period from the biting of the H-shaped intermediate material into the finishing universal rolling mill to the kicking-out. The finishing universal rolling method according to any one of claims 4 to 9. The rolling shaping is performed by adjusting the phase angle of the eccentric sleeve and changing the position of the web restraining roller during the period from the biting of the H-shaped intermediate material into the finishing universal rolling mill to the kicking-out. The finishing universal rolling method according to any one of claims 4 to 9. Rolling shaping was performed by causing the finishing universal rolling mill to bite the leading end of the H-shaped intermediate material in a state where the central axis of the web restraining roller was positioned downstream of the central axis of the body width variable horizontal roll. rear,
The central axis of the web restraining roller is moved so as to be located upstream from the central axis of the variable barrel width horizontal roll, and the rear end portion of the H-shaped intermediate material is kicked out of the finishing universal rolling mill. The finishing universal rolling method according to any one of claims 4 to 9 and 11.

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