JP4277640B2 - Method for producing shaped steel with protrusion and rolling equipment for shaped steel - Google Patents

Description

  The present invention relates to a method of manufacturing a shaped steel with a protrusion and a rolling equipment for the shaped steel used therein.

Shape steel such as H-section steel having a web and flanges provided at both ends of the web is generally rolled into a final product by a rolling equipment 101 shown in FIG.
As shown in FIG. 15A, this rolling equipment 101 includes a breakdown rolling mill 102, a rough universal rolling mill 103, an edging rolling mill 104, and a finishing universal rolling mill 105, or in FIG. 15B. As shown in FIG. 2, there are a breakdown rolling mill 102, a first rough universal rolling mill 103a, an edging rolling mill 104, a second rough universal rolling mill 103b, and a finishing universal rolling mill 105. With such a rolling equipment 101, a material such as a slab, bloom, or beam blank heated in a heating furnace is sequentially rolled by each rolling mill to produce a section steel having a predetermined cross-sectional dimension.

First, a method for rolling H-section steel with the rolling equipment 101 shown in FIG.
First, the material heated in the heating furnace is rolled into a rough H section by a breakdown mill 102. The breakdown rolling mill 102 is a double rolling mill in which upper and lower rolls each having a plurality of open or closed holes are provided along a roll cylinder.
And the raw material rolled into the rough H section by the breakdown rolling mill 102 is reciprocally rolled a plurality of times by a rough universal rolling mill group consisting of a rough universal rolling mill 103 and an edging rolling mill 104, and (B) in FIG. To a H-shaped cross section having a predetermined thickness.

The rough universal rolling mill 103 includes a pair of upper and lower horizontal rolls 106 and a pair of left and right vertical rolls 107 as shown in FIG. The crude universal rolling mill 103, the web S _W of the material S in the roll gap formed by the pair of upper and lower horizontal rolls 106 is reduction in the thickness direction, and left and right vertical rolls 107 side of the upper and lower horizontal rolls 106 flange S _F of left and right roll gap formed by the is reduction in its thickness direction.

Further, the edging mill 104 includes a pair of upper and lower edging rolls 108 as shown in FIG. This edging rolling mill 104, the width of the flange S _F is rolling to a predetermined size in a roll gap formed by a pair of upper and lower edging rolls 108.
The material S rolled into the shape shown in FIG. 16B is carried into the finishing universal rolling mill 105. The finishing universal rolling mill 105 is provided with a pair of upper and lower horizontal rolls 109 and a pair of left and right vertical rolls 110 as shown in FIG. The finishing universal rolling mill 105, the thickness reduction of the flange S _F, the angle revitalization of thickness reduction and the flange S _F of the web S _W is performed, it is be finished to the dimensions of the final product.

  By the way, in a reinforcing bar / steel concrete method used in building construction or the like, a steel material with protrusions may be used in order to increase adhesion between concrete and steel frame. For example, in the H-section steel used for pillars and beams, etc., those having protrusions on the inner and outer surfaces of the flange are used. The protrusions are required to have a certain height (for example, 1 mm or more), and when the number of protrusions is large or the protrusions are long, the adhesion to concrete is further increased.

Here, as shown in FIG. 17, in the production of H-beams S having a plurality of projections t to the outer surface of the flange S _F is the finishing universal rolling mill 205, perpendicular to the outer surface of the pair of right and left vertical rolls 210 previously formed a plurality of grooves 210a extending in a direction, by rolling the outer surface of the flange S _F in the vertical roller 210, the H-beams S having a plurality of projections t to the outer surface of the flange S _F relatively easily Can be manufactured. In FIG. 17, reference numeral 209 denotes a horizontal roll.

On the other hand, the universal finish rolling by the finishing universal rolling mill 105, as shown in FIG. 16 (C), the inner surface of the flange S _F is is pressure on the side of the horizontal rolls 109, omission on the side of the horizontal rolls 109 Gradient but little, and since the relative slippage between the roll and the material is large, side simply forming a groove in the side surface of the horizontal rolls 109, which also form the projections by transferring on the inner surface of the flange S _F, out of the rolling There was a problem that the projections were crushed. Thus, H-shaped steel having a protrusion on the inner surface of the flange S _F was thought to not be easily manufactured by hot rolling.
H-shaped steel with protrusions on the inner surface of the flange is said to have better adhesion to concrete than those with protrusions on the outer surface of the flange, so ribs and protrusions are welded to the inner surface of the flange by hot rolling after welding. It was manufactured by giving. However, productivity was very poor with this method.

Therefore, it is still desired to provide protrusions on the inner surface of the flange by hot rolling, and several proposals have been made.
For example, Patent Document 1, as shown in FIG. 18, the inner surface of each flange S _F second vertical roll 308 up, down, left and right the flanges S _F consisting of a small diameter roll grooved for reduction the inner surface of the H-beams S 4 arrangement and setting, it supports each second vertical roll 308 by extending the respective chocks 309 inward of the two right and left vertical rolls 307 for rolling the outer surface of the flange S _F at bearings for each, each horizontal roll The bevel gear 310 on the side surface 306 and the bevel gear 311 of each of the second vertical rolls 308 are meshed with each other, and a peripheral speed adjusting means is provided between the peripheral speed of the drive portion by the bevel gears 310 and 311 and the peripheral speed of the second vertical roll 308 A finish rolling apparatus 305 is disclosed.

According to the finish rolling apparatus 305, the H-shaped steel having a protrusion on the inner surface of the flange S _F that adhesion was excellent with concrete can be produced by hot rolling.
Patent Document 2 discloses a finishing universal rolling mill in which a groove 402 is formed on a side surface of a horizontal roll 401 and the horizontal roll 401 is incorporated as shown in FIG. Here, a plurality of grooves 402 are formed on the side surface of the horizontal roll 401, starting from the corner portion 401 a on the side surface of the horizontal roll 401 and heading toward the roll shaft 403.
By performing finish rolling of the shape steel having the flange and the web with this finishing universal rolling mill, a plurality of protrusions are formed on the inner surface of the flange when the side surface of the horizontal roll 401 is pressed against the inner surface of the flange.

Furthermore, Patent Document 3 discloses a universal rolling mill in which a striped recess is formed on the side surface of a horizontal roll 411 as shown in FIG. 20 and such a horizontal roll 411 is incorporated.
By rolling the shaped steel 413 having flanges and webs with the roll 412 by this universal rolling mill, a plurality of protrusions are formed on the inner surface of the flange when pressed against the inner surface of the flange by the striped recesses of the horizontal roll 411. Yes. FIG. 21 shows a structural steel 413 in which a plurality of protrusions are formed as described above.
20 and 21 that the universal rolling mill is a rough universal rolling mill having a draft gradient.
JP-A-3-32408 Japanese Patent Laid-Open No. 2003-136102 JP-A-8-174054

About the technique of the said patent document 1, it is necessary to incorporate a special 2nd vertical roll into a finishing rolling apparatus, and it becomes a very complicated finishing rolling installation. Therefore, when it is going to implement | achieve the technique disclosed by patent document 1, an installation cost will become very high.
On the other hand, with respect to the technique of Patent Document 2, it can be expected to easily form protrusions on the flange inner surface and the like without a large capital investment. However, since the projection is formed by a finishing mill having almost no draft, the length of a healthy projection that can be formed is limited. For this reason, in order to form sound protrusions, there is a problem that the rolling conditions (for example, the rolling reduction) must be limited.

Here, the healthy protrusion is a protrusion that is not peeled off or largely deformed after the protrusion is formed.
Moreover, it is described that the technique of the said patent document 3 can form a processus | protrusion on the flange inner surface with a rough universal rolling mill. However, there is no disclosure about the shape of the concave portion (that is, the groove) on the side surface of the horizontal roll that enables sound protrusion formation and the finish rolling method performed after protrusion formation.
Accordingly, the present invention has been made in view of the above-mentioned problems, and a method for manufacturing a projection-shaped steel capable of forming a projection on a shaped steel without being damaged, and a rolling equipment for the shaped steel used therein. The purpose is to provide.

The method for manufacturing a shaped steel with a protrusion according to the invention of claim 1 includes an angle formed between the side surface and the peripheral surface is obtuse before the finish rolling of the shaped steel having a flange and a web, and includes a corner portion thereof. Using a rolling mill incorporating a horizontal roll formed with a plurality of grooves extending in the roll axis direction on the side surface at a predetermined pitch in the circumferential direction, the vicinity of the fillet portion of the shape steel is pressed near the corner portion of the horizontal roll By forming a plurality of protrusions in the longitudinal direction of the shape steel in the vicinity of the fillet portion, and in the finish rolling, a horizontal roll having a width smaller than the inner width of the web of the shape steel before the finish rolling is formed . While constraining the web on the peripheral surface, the flanges of the shape steel are angled on the peripheral surface of the vertical roll, thereby crushing a plurality of protrusions formed in the vicinity of the fillet portion of the shape steel before the finish rolling. Not a vertical roll Perform the angle revitalization of Kikatachiko of the flange.

As a result, the shape steel before the finish rolling has not yet been raised in the angle of the flange, so that it is possible to ensure a draft gradient when forming the protrusions. Moreover, since the groove is provided in the vicinity of the corner portion of the horizontal roll, the protrusion can be reliably removed from the groove. Further, in finish rolling, the angle of the flange of the shape steel is raised without crushing the protrusions formed on the shape steel .

Further, in the method for manufacturing a shaped steel with a protrusion according to the invention of claim 2 , the angle formed between the side surface and the peripheral surface is obtuse before the finish rolling of the shaped steel having the flange and the web, and the corner portion is formed. Using a rolling mill incorporating a horizontal roll in which a plurality of grooves extending in the roll axis direction are formed at a predetermined pitch in the circumferential direction on the included side surface, in the vicinity of the corner portion of the horizontal roll and in the vicinity of the fillet portion of the shape steel Is formed in the vicinity of the fillet portion, and a plurality of protrusions are formed in the longitudinal direction of the shape steel. In the finish rolling, a width substantially equal to the inner width of the web of the shape steel before the finish rolling is obtained. The flange of the shape steel is restrained by restraining the web with a peripheral surface of a horizontal roll having a recess in the vicinity of the corner, and restraining the flange with a side surface of the horizontal roll and a peripheral surface of the vertical roll. By doing the angle raising No ulcer Succoth a plurality of projections formed in the vicinity fillet Urabe of the shaped steel before the finish rolling, performing angle revitalization of the flange of the shaped steel vertical rolls.

The method for manufacturing a steel with projection according to the invention described in claim 3 is the method for manufacturing a steel with projection according to claim 1 or 2 , wherein the protrusion is formed before the protrusion is formed. The surplus material for forming is formed in the material forming the shape steel.
Moreover, the rolling equipment for the shape steel according to the invention of claim 4 is in the vicinity of the fillet portion of the shape steel at the front stage of the finish rolling mill for performing finish rolling of the shape steel having a flange and a web, A rolling mill for forming protrusions is provided for forming a plurality of protrusions in the longitudinal direction. The protrusion-forming rolling mill has an obtuse angle between the side surface and the peripheral surface, and a plurality of grooves extending in the roll axis direction are formed at a predetermined pitch in the circumferential direction on the side surface including the vicinity of the corner portion. The finish rolling mill can restrain the web on the peripheral surface without crushing a plurality of projections formed in the vicinity of the fillet portion of the shape steel by the projection forming rolling mill. A horizontal roll is provided , and the horizontal roll of the finish rolling mill has a width smaller than the inner width of the shaped steel web before the finish rolling.

Also, rolling equipment in the form steel according to the fifth aspect of the present invention, the front flange and rolling mill finishing performing finish rolling shape steel having a web, a vicinity fillet Urabe of the shaped steel, said section steel A rolling mill for forming protrusions for forming a plurality of protrusions in the longitudinal direction. The protrusion-forming rolling mill has an obtuse angle between the side surface and the peripheral surface, and a plurality of grooves extending in the roll axis direction are formed at a predetermined pitch in the circumferential direction on the side surface including the vicinity of the corner portion. The finish rolling mill can restrain the web on the peripheral surface without crushing a plurality of projections formed in the vicinity of the fillet portion of the shape steel by the projection forming rolling mill. A horizontal roll is provided, the horizontal roll of the finish rolling mill has a width substantially equal to the inner width of the web of the shape steel before the finish rolling, and a recess is provided in the vicinity of the corner portion.
Further, rolling equipment of shape steel according to the invention of claim 6 is the rolling equipment of shape steel of the invention according to claim 4 or 5, wherein the projection-forming mill is a universal rolling mill.

  According to the present invention, the protrusion can be formed on the shape steel without being damaged.

The best mode for carrying out the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram of rolling equipment to which the method for manufacturing a steel with projection according to the present invention is applied.
As shown in FIG. 1, the rolling equipment 1 for producing the H-section steel S is similar to the rolling equipment 101 shown in FIG. Machine 4 and finishing universal rolling mill 6. The rolling equipment 1 is provided with a protrusion forming rolling mill 5 in front of the finishing universal rolling mill 6.

FIG. 2 shows a roll configuration and roll shape of the protrusion-forming rolling mill 5.
As shown in FIG. 2, the protrusion forming rolling mill 5 is configured by incorporating a pair of upper and lower horizontal rolls 11 and 12 and a pair of left and right vertical rolls 21 and 22. For example, such a configuration is the same as that of the rough universal rolling mill 3.
A pair of upper and lower horizontal rolls 11, 12 has a shape corresponding to the shape of the front of the shaped steel angle revitalization of the flange S _F is performed. That is, in the horizontal rolls 11 and 12, the angle formed between the side surfaces 11a and 12a and the peripheral surfaces 11b and 12b is at least an obtuse angle.

The horizontal rolls 11 and 12 are formed with protrusion-forming grooves from the side surfaces 11a and 12a to the peripheral surfaces 11b and 12b, that is, in the vicinity of the corners. Here, the corner portions of the horizontal rolls 11 and 12 are boundary portions between the side surfaces 11a and 12a and the peripheral surfaces 11b and 12b. And this corner part has comprised the R surface shape normally.
In FIG. 3, (A) and (B) show horizontal rolls 11 and 12 in which grooves (or slits) 13 for forming protrusions are formed.
The groove 13 extends from the edge of the peripheral surfaces 11b and 12b to the side surfaces 11a and 12a through the corners, and extends linearly toward the roll shaft 14 on the side surfaces 11a and 12a. Thus, the groove 13 is formed including at least the corner portions of the horizontal rolls 11 and 12. A plurality of grooves 13 are formed at a predetermined pitch in the circumferential direction of the horizontal rolls 11 and 12.

FIG. 4 shows a roll configuration and roll shape of the finishing universal rolling mill 6.
As shown in FIG. 4, the finishing universal rolling mill 6 includes a pair of upper and lower horizontal rolls 31 and 32 and a pair of left and right vertical rolls 41 and 42.
Width of the horizontal roll 31 and 32 is smaller than the inner width of the web _{S W.} The horizontal rolls 31 and 32 are disposed at a substantially intermediate position between the one vertical roll 41 and the other vertical roll 42. In addition, the width | variety of the horizontal rolls 31 and 32 may be fixed, and may be changed freely.

In the rolling equipment 1 configured as shown in FIG. 1, the material is rolled into the same shape as shown in FIG. 16B in the breakdown rolling mill 2, the rough universal rolling mill 3 and the edging rolling mill 4. The
And the raw material rolled into the same shape as the shape shown in FIG. 16B has protrusions in the vicinity of the fillet portion by the grooves 13 of the horizontal rolls 11 and 12 shown in FIG. It is formed.
Here, the fillet Urabe, refers to a site where the flange S _F and the web S _w of shape steel lead. Further, the vicinity of the fillet portion is a generic name for the flange inner surface near the fillet portion and the web end surfaces near the fillet portion including the fillet portion.
Then, finish while restraining the web S _W by the horizontal rolls 31, 32 shown in FIG. 4 of the universal rolling mill 6, and the vertical rolls 41 and 42, the angle revitalization of the flange S _F is performed, finishing the dimensions of the final product It is done.

Since the width of the horizontal roll 31 and 32 is smaller than the inner width of the web _{S W,} the thickness reduction of the flange _{S F} is not performed.
FIG. 5 shows the final product. As described above, when the vicinity of the fillet portion is reduced by the horizontal rolls 11 and 12 in the projection forming mill 5, the shape of the groove 13 is transferred, and as shown in FIG. A protrusion t is formed in the vicinity.
Next, effects in the embodiment will be described.
As shown in FIG. 3, the horizontal rolls 11 and 12 have the obtuse angles of the side surfaces 11a and 12a with respect to the peripheral surfaces 11b and 12b. Thus, the flanges S _F inner surface to the side surface 11a of, become 12a has a draft angle, it is possible to pull out easily projections t from the groove 13. This effect will be described with reference to FIG.

Consider the case where a pair of horizontal rolls 11 and 12 are arranged as shown in FIG. Further, consider a region A and a region B where the line 14a connecting the roll shafts 14 of the pair of horizontal rolls 11 and 12 and the boundary thereof coincide with each other in the direction perpendicular to the paper surface. In the region A, protrusions are formed on the inner surface of the flange.
In this case, since the projection t of the inner surface of the transferred flange S _F in groove 13 (the portion in particular aspects of the horizontal rolls 11, 12) of the horizontal roll 11 and 12 to prevent collapse in the region B, region In B, the condition is that the protrusion t is always accommodated in the groove 13.

Here, it is assumed that the side surfaces 11a and 12a of the horizontal rolls 11 and 12 are perpendicular to the peripheral surfaces 11b and 12b. For example, like a horizontal roll used in a finishing universal rolling mill.
In this case, in the region B, since the side surfaces 11a, 12a are in a state of contact with the inner surface of the flange S _F, for projection t of the inner surface of the flange S _F is prevented crushed in region B In the region B, it is required that the protrusion t is always accommodated in the groove 13.

However, when the speed in the rotation direction of the horizontal rolls 11 and 12 is slower than the speed in the rolling direction of the H-section steel S, or in the rotation direction of the horizontal rolls 11 and 12 with respect to the speed in the rolling direction of the H-section steel S. When the speed increases, in the region B, the groove 13 and the protrusion t come into contact with each other, and the protrusion t is crushed.
On the other hand, when the present invention is applied, in the horizontal rolls 11 and 12, the side surfaces 11a and 12a are obtuse with respect to the peripheral surfaces 11b and 12b. Therefore, in the region B, the side surfaces 11a and 12a are flanges _SF. It will move away from the inside. That is, the flanges S _F of the inner surface to the side surface 11a, become 12a has a draft angle, thereby, in the region B, it is possible to safely disconnect the protrusion t from the groove 13.

  Thus, since the protrusion t can be safely removed from the groove 13 in the region B, the protrusion t can be lengthened. That is, when the side surfaces 11a and 12a of the horizontal rolls 11 and 12 are perpendicular to the peripheral surfaces 11b and 12b, if the long protrusion t is to be formed, there is a possibility that the protrusion t is crushed by the groove 13. Get higher. However, if the present invention is applied, the protrusion t can be safely removed from the groove 13 in the region B, so that the protrusion t can be lengthened.

In other words, in the horizontal rolls 11 and 12, the shape in which the side surfaces 11a and 12a are obtuse with respect to the peripheral surfaces 11b and 12b is indispensable for installing the projection forming rolling mill 5 before finish rolling. It can be said that it is a simple shape. Thus, by installing the mill 5 projections formed before the finish rolling, to match the flange S _F angle revitalization previous H-beam S of only determine the shape of the horizontal rolls 11, 12, omission It can be said that the gradient is secured and the protrusion t is prevented from being crushed by the groove 13. That is, it can be said that the formation of a sound protrusion t is realized with a simple configuration.

In order to easily remove the protrusion t from the groove 13 as described above, the groove 13 needs to be continuous with the corner portions of the horizontal rolls 11 and 12. As described above, the groove 13 is formed so as to extend from the side surfaces 11a, 12a of the horizontal rolls 11, 12 to the edges of the peripheral surfaces 11b, 12b, so that the condition is satisfied.
Further, as shown in FIG. 4, since the reduction of the outer surface of the flange S _F in the vertical rolls 21, 22 by its pressure force, to further increase the height of the projection t, which is formed on the inner surface side of the flange S _F be able to.

Further, as described above, the width of the horizontal rolls 31, 32 of the finishing universal rolling mill 6 is made smaller than the inner width of the web S _W. Thus, without crushing the projections t formed in front of the projection forming mill 5, to restrain the web S _W at the peripheral surface of the horizontal roll 31 and 32, the angle revitalization of the flange S _F perpendicular roll 41 It can be performed.
The embodiment of the present invention has been described above. However, the present invention is not limited to being realized as the above-described embodiment.

That is, in the above-described embodiment, the horizontal rolls 11 and 12 included in the projection forming mill 5 have at least an obtuse angle between the side surfaces 11a and 12a and the peripheral surfaces 11b and 12b, and the side surface 11a. , 12a to the peripheral surfaces 11b, 12b has been described. However, it goes without saying that the present invention is not limited to this.
For example, the protrusion-forming rolling mill 5 may include only the horizontal rolls 51 and 52 as shown in FIG. The horizontal rolls 51 and 52 are substantially perpendicular to each other between the side surfaces 51a and 52a and the peripheral surfaces 51b and 52b. The horizontal rolls 51 and 52 are formed with protrusion-forming grooves 53 from the side surfaces 51a and 52a to the peripheral surfaces 51b and 52b, that is, in the vicinity of the corners. By using the rolling mill 5 for forming protrusions, the H-section steel S is formed with protrusions in the vicinity of the fillet portion.

As in this example, when the main purpose is to form a protrusion only in the vicinity of the fillet portion or when a very large protrusion height or length is not required, the vertical roll can be omitted, and the horizontal roll 51 , 52 need not be provided with a draft.
It may also be slightly larger than the inner width of the web S _W the width of the horizontal rolls 51 and 52. By doing in this way, since the reduction in the vicinity of the fillet part of the H-section steel S by the vicinity of the corner part of the horizontal rolls 51 and 52 becomes a strong reduction, a projection having a height and a length can be formed.

Moreover, in the above-mentioned embodiment, the width of the horizontal rolls 31 and 32 of the finishing universal rolling mill 6 is reduced for the purpose of preventing the projections t formed by the rolling mill 5 for forming projections in the previous stage from being crushed. It is set to be smaller than the inner width of the web S _W. However, it is not limited to this. FIG. 8 shows another example.
As shown in FIG. 8, the horizontal rolls 35 and 36 of the finishing universal rolling mill 6 are provided with recesses 35a and 36a over the entire circumference of the corner. Thereby, in the finishing universal rolling mill 6, since the projection t formed by the former projection forming rolling mill 5 is accommodated in the recesses 35a and 36a of the horizontal rolls 35 and 36, the projection t is in contact with the horizontal rolls 35 and 36. Is avoided. Thereby, it can prevent crushing the protrusion t formed with the rolling mill 5 for protrusion formation of the front | former stage by the finish rolling of the finishing universal rolling mill 6. FIG.

In the case of such a structure, unlike the embodiment described above, the horizontal rolls 35, 36 slightly larger width than the inner width of the web S _W of the horizontal rolls 35, 36 sides and the vertical rolls 41, 42 it is possible to perform thickness reduction of the flange S _F at the circumferential surface. That is, the horizontal roll has a width approximately equal to the inner width of the web.
Further, as shown in FIG. 9 and FIG. 10, surpluses x1 and x2 can be formed in the vicinity of the fillet portion of the material before the protrusion formation (the front stage of the protrusion forming rolling mill 5). Figure 9 shows a case of forming the excess thickness x1 on the inner surface of the flange S _F, FIG. 10 shows a case of forming the excess thickness x2 on the outer surface of the flange S _F. By forming the surpluses x1 and x2 in this way, the portion where the protrusion t is formed is under high pressure, so that the protrusion t can be formed higher.

As a means for forming the excess thickness x1 on the inner surface of the flange S _F as shown in FIG. 9, (horizontal roll, for example rough universal rolling mill 3) horizontal roll present in a stage preceding mill 5 projections formed 61, 62 Concave portions 61a and 62a are provided on the side surfaces of the slab. Thus formed, the web S _W a roll gap formed by the pair of upper and lower horizontal rolls 61, 62 and reduction in the thickness direction thereof, by a vertical roll (not shown) and side surfaces of the upper and lower horizontal rolls 61, 62 to pressure flange S _F in the thickness direction of the roll gap to be. This forms excess thickness x1 on the inner surface of the flange S _F. Thereafter, the thickness reduction of the flange S _F performs include excess thickness x1 with side vertical roll 21 and 22 of the horizontal rolls 11, 12 of the projections forming mill 5 in FIG. 2, the horizontal rolls having a groove 13 in FIG. 3 the inner surface of the flange _{S F} in contact with 11, 12 corner portion side of the forming protrusions t.

As the means for forming the excess thickness x2 on the inner surface of the flange S _F as shown in FIG. 10, front vertical rolls (for example, a vertical roll rough universal rolling mill 3) than the rolling mill 5 for projection formation 65 circumference of A recess 65a is provided on the surface. Formation position of the concave portion 65a is a region for rolling the central portion of the flange S _F. Thus, the reduction of the web S _W a roll gap formed by the pair of upper and lower horizontal rolls 67, 68 in the thickness direction, the roll gap formed by the vertical roller 65 and the side surface of the upper and lower horizontal rolls 67, 68 in by rolling the flange S _F in the thickness direction to form a excess thickness x2 on the outer surface of the flange S _F. Thereafter, pressure flange S _F in the thickness direction of the roll gap by side and vertical rolls 21, 22 of the horizontal rolls 11, 12 of the projections forming mill 5 in FIG. As shown in FIG. 3, since the horizontal rolls 11 and 12 are formed with grooves 13 at the corners, protrusions t are formed. At this time, since the reduction by the vertical rolls 21 and 22 is increased by the extra space x2, the portion where the protrusion t is formed is under strong pressure, and the protrusion t is formed higher.

Moreover, in the above-mentioned embodiment, it demonstrated when the shape steel which forms the protrusion t in a flange inner surface is a H-section steel. However, it is not limited to this. That is, other shape steels such as an I-shaped steel having a web and a flange, a T-shaped steel, or a grooved steel may be used.
Further, a groove extending in the vertical direction may be provided on the peripheral surface of the vertical roll of the finishing universal rolling mill 6, and a protrusion may be formed on the outer surface of the flange. Moreover, a groove | channel may be provided in the surrounding surface of the horizontal roll of a finishing universal rolling mill, and a protrusion may be formed also in the center part of a web surface.

In the rolling equipment 1 shown in FIG. 1, an H-section steel (product dimensions: web height 600 mm, flange width 300 mm, web thickness 12 mm, flange thickness 25 mm) having protrusions in the vicinity of the fillet portion was manufactured.
(1) When a recessed part is provided in the horizontal roll of a finishing universal rolling mill The universal rolling mill was used as the rolling mill 5 for protrusion formation. Grooves 13 having a length L1 of 100 mm, a width W of 20 mm, and a pitch P of 60 mm were formed from the corner portions of the horizontal rolls 11 and 12 to the side surfaces as shown in FIGS. The depth d1 of the groove 13 is constant regardless of the position, and the depth d1 is 4 mm. The taper angle θ (slope) of the horizontal rolls 11 and 12 was 5 °. Correspondingly, the taper angle of the vertical rolls 21 and 22 was also set to 5 °. The target rolling reduction in protrusion forming rolling was 12% for both the flange and the web.

  Under such conditions, as a first conforming example of the present invention, the finishing universal rolling mill 6 is shown in FIG. 8 for the purpose of preventing the projection t formed by the preceding projection-forming rolling mill 5 from being crushed. As shown in FIG. 4, horizontal rolls 35 and 36 provided with recesses 35a and 36a over the entire periphery of the corner are provided. As shown in FIG. 12, the length L2 from the corner part to the side surface of the horizontal rolls 35 and 36 was 100 mm, and the depth d2 was 5 mm. With such a finishing universal rolling mill 6, flange thickness reduction, web thickness reduction and flange angle reduction were performed.

In the comparative example (conventional example), the protrusion forming rolling is performed in the same manner as the protrusion forming in the first conforming example, and the finish rolling is performed by reducing the thickness of the flange by a normal finish rolling method as shown in FIG. The thickness was reduced and the flange angle was raised.
As a result, in the first matching example, a healthy protrusion t having a length of 95 mm and a height of 1.8 mm could be formed without the protrusion being crushed or peeled off. On the other hand, in the comparative example, the protrusion t was crushed by finish rolling, and a sound protrusion could not be formed.

(2) When surplus is formed by a rough universal rolling mill As a second conforming example of the present invention, the rough universal rolling mill 3 is provided with a vertical roll 65 having a recess 65a on its side surface as shown in FIG. I have. As shown in FIG. 13, the dimensions were a depth d3 of 2 mm and a length L3 of 220 mm. Thereby, with the rough universal rolling mill 3, the surplus was formed in the flange outer surface of the material before protrusion formation. The protrusion forming rolling conditions and the finish rolling method are the same as those in the first applicable example.
As a result, a projection having a length of 100 mm and a height of 3.5 mm could be formed, and a healthy projection having a height higher than the conventional one could be formed.

(3) When the projection forming rolling mill includes only a horizontal roll provided with grooves in the vicinity of the corner portion As a third conforming example of the present invention, the projection forming rolling mill 5 is as shown in FIG. Only the horizontal rolls 51 and 52 are provided, and a projection forming groove 53 is provided in the vicinity of the corner portion. Specifically, a universal rolling mill was used as the protrusion forming rolling mill 5. As shown in FIGS. 14A and 14B, the dimensions are such that the length L4 on the side surfaces 51a and 52a is 30 mm, the length L5 on the peripheral surfaces 51b and 52b is 20 mm, the width W is 10 mm, and the pitch P is 30 mm. A groove 53 is formed. The depth d4 of the groove 53 was 3 mm. The taper angle θ of the horizontal roll was 0 °, that is, a draft was not formed. The width of the horizontal rolls 51 and 52 was 4 mm larger than the inner width of the shaped steel web. The target rolling reduction in protrusion forming rolling was set to 10% in the vicinity of the fillet portion.

Further, the finishing universal rolling machine 6, in order to prevent that crushed projections t formed by rolling mill 5 for front projections formed, as shown in FIG. 4, smaller width than the inner width of the web S _W Horizontal rolls 31 and 32 are provided. Thereby, in the finishing universal rolling mill 6, the flange thickness reduction was not performed, but the flange angle reduction and the web thickness reduction were performed.
As a result, it is possible to form a projection t having a fine pitch of 30 mm, a height of 1.5 mm, and a total length (equivalent to L4 + L5) of 50 mm, and without forming the shape of the projection t. did it.

It is a schematic block diagram of the rolling equipment of embodiment of this invention. It is a figure which shows the horizontal roll and vertical roll which are integrated in the rolling mill for protrusion formation of the said rolling equipment. It is a figure which shows the shape of the said horizontal roll. It is a figure which shows the horizontal roll and vertical roll which are integrated in the finishing universal rolling mill of the said rolling equipment. It is a fragmentary perspective view of the H-section steel which has a processus | protrusion. It is the figure used for description of an effect. It is a figure which shows the other horizontal roll integrated in the said rolling mill for protrusion formation. It is a figure which shows the case where a recessed part is provided in the corner part vicinity of the horizontal roll of the said finishing universal rolling mill. It is a figure which shows the case where the recessed part for forming surplus thickness in the inner surface of a flange is provided in the side surface of the horizontal roll of a rough universal rolling mill. It is a figure which shows the case where the recessed part for forming the surplus thickness in the outer surface of a flange is provided in the surrounding surface of the vertical roll of a rough universal rolling mill. It is a figure for demonstrating the 1st example of adaptation in an Example, Comprising: It is the figure used in order to demonstrate the groove | channel provided in the horizontal roll of the rolling mill for protrusion formation. It is a figure for demonstrating the 1st example 1 of adaptation in an Example, Comprising: It is the figure used in order to demonstrate the recessed part provided in the horizontal roll of a finishing universal rolling mill. It is a figure for demonstrating the 2nd example of adaptation in an Example, Comprising: It is the figure used in order to demonstrate the recessed part provided in the shape of the vertical roll of the rough universal rolling mill. It is a figure for demonstrating the 3rd example of adaptation in an Example, Comprising: It is the figure used in order to demonstrate the groove | channel provided in the horizontal roll of the rolling mill for protrusion formation. It is a schematic block diagram of the general rolling equipment of the shape steel which has a web and a flange, (A) is a schematic block diagram of the rolling equipment which arranged one rough universal rolling mill, (B) is two rough universal rolling mills It is a schematic block diagram of the arranged rolling equipment. FIG. 15A shows the reduction state when rolling the H-section steel with the rolling equipment shown in FIG. 15A, FIG. 15A is the reduction state by rough universal rolling, FIG. 15B is the reduction state by edging rolling, and FIG. The state of reduction by universal rolling is shown. It is a schematic perspective view of the finishing universal rolling mill which forms a processus | protrusion on the flange outer surface of a prior art example. It is a schematic front view of the finishing rolling apparatus of patent document 1 which forms protrusion on the flange inner surface. It is a figure which shows the horizontal roll which provided the groove | channel currently incorporated in the finishing universal rolling mill of the rolling equipment of patent document 2. FIG. It is a figure which shows the horizontal roll which provided the recessed part integrated in the finishing universal rolling mill of patent document 3. FIG. It is a perspective view which shows the shape steel in which the protrusion was formed in the finishing universal rolling mill of the said patent document 3. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling equipment 2 Breakdown rolling mill 3 Coarse universal rolling mill 4 Edging rolling mill 5 Protrusion forming rolling mill 6 Finishing universal rolling mill 11, 12, 51, 52 Horizontal roll of projection forming rolling mill 13 Groove 21, 22 Protrusion forming Vertical roll of rolling mill 31,32 Horizontal roll of finishing universal rolling mill 41,42 Vertical rolling of finishing universal rolling mill SH section steel (section steel)
_SF flange _SW web t protrusion

Claims (6)

Before the finish rolling of the section steel having the flange and the web, the angle formed between the side surface and the peripheral surface is an obtuse angle, and a plurality of grooves extending in the roll axial direction are formed in the circumferential direction on the side surface including the corner portion. Using a rolling mill incorporating a horizontal roll formed with a pitch, pressing the vicinity of the fillet portion of the shape steel in the vicinity of the corner portion of the horizontal roll is near the fillet portion, and the longitudinal direction of the shape steel Forming a plurality of protrusions on the
In the finish rolling, the web is restrained by the peripheral surface of the horizontal roll having a width smaller than the inner width of the web of the shaped steel before the finish rolling, and the angle of the flange of the shaped steel is raised on the peripheral surface of the vertical roll. By performing, the angle of the flange of the shape steel is raised with a vertical roll without crushing the plurality of projections formed in the vicinity of the fillet portion of the shape steel before the finish rolling. Production method. Before the finish rolling of the section steel having the flange and the web, the angle formed between the side surface and the peripheral surface is an obtuse angle, and a plurality of grooves extending in the roll axial direction are formed in the circumferential direction on the side surface including the corner portion. Using a rolling mill incorporating a horizontal roll formed with a pitch, pressing the vicinity of the fillet portion of the shape steel in the vicinity of the corner portion of the horizontal roll is near the fillet portion, and the longitudinal direction of the shape steel Forming a plurality of protrusions on the
In the finish rolling, the web is constrained by the peripheral surface of a horizontal roll having a width substantially equal to the inner width of the web of the shaped steel before the finish rolling, and a recess is provided in the vicinity of the corner, and the horizontal By constraining the flange with the side surface of the roll and the peripheral surface of the vertical roll, the flange of the shape steel is angled to crush the plurality of protrusions formed in the vicinity of the fillet portion of the shape steel before the finish rolling. Succoth no method for producing a collision Okoshizuke shaped steel you and performing angle revitalization of the flange of the shaped steel vertical rolls. 3. The method for producing a shaped steel with protrusions according to claim 1 or 2 , wherein, before forming the protrusions, an extra wall for forming the protrusions is formed in the material forming the shape steel. . A projection forming mill for forming a plurality of projections in the longitudinal direction of the shape steel, in the vicinity of the fillet portion of the shape steel, in the front stage of the finish rolling mill for performing finish rolling of the shape steel having a flange and a web. Prepared,
The protrusion forming rolling mill has an obtuse angle between the side surface and the peripheral surface, and a plurality of grooves extending in the roll axis direction are formed at a predetermined pitch in the circumferential direction on the side surface including the vicinity of the corner portion. With rolls,
The finish rolling mill includes a horizontal roll capable of restraining the web on the peripheral surface without crushing a plurality of protrusions formed in the vicinity of the fillet portion of the shape steel by the protrusion forming rolling mill ,
The horizontal roll of the said finishing mill is a width | variety smaller than the internal width of the web of the said shape steel before the said finish rolling, The rolling mill of shape steel characterized by the above-mentioned . A projection forming mill for forming a plurality of projections in the longitudinal direction of the shape steel, in the vicinity of the fillet portion of the shape steel, in the front stage of the finish rolling mill for performing finish rolling of the shape steel having a flange and a web. Prepared,
The protrusion forming rolling mill has an obtuse angle between the side surface and the peripheral surface, and a plurality of grooves extending in the roll axis direction are formed at a predetermined pitch in the circumferential direction on the side surface including the vicinity of the corner portion. With rolls,
The finish rolling mill includes a horizontal roll capable of restraining the web on the peripheral surface without crushing a plurality of protrusions formed in the vicinity of the fillet portion of the shape steel by the protrusion forming rolling mill,
Horizontal rolls of the finishing mill has a width which is substantially equal to a web inner width of the shaped steel before the finish rolling, and rolling shape steel you characterized in that a concave portion is provided in the vicinity of the corner portion Facility. 6. The shape steel rolling equipment according to claim 4, wherein the projection forming rolling mill is a universal rolling mill.

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