JPH0417910A - Rolling device for edging material to be rolled with flange - Google Patents

Abstract

PURPOSE:To arbitrarily change the dimension of roll and to roll an H-shape steel with an optional width of flange by forming the width of the outside face of web constraining collar which is brought into contact with a material to be formed smaller than the width of the flange of a material to be formed and also specifying the inclined angles of web constraining collar and the shaft of horizontal rolls. CONSTITUTION:When the width P of the outside face of web constraining collar 7-1 which is brought into contact with the material 12 to be formed and which has the inclined angle gamma of side wall is formed smaller than the width Fs of the flange of shapes 12 of the material to be formed, also the inclined angle alpha of the side wall of the web constraining collar 7-1 which is brought into contact with the side face of a working roll 10 for rollingdown flange is set smaller than an angle alpha and the inclined angle theta of the shaft part 7-2 of horizontal roll which is brought into contact with the outer peripheral surface of a back up roll 9 is set equivalent to or larger than the angle gamma, the dimension of roll of equivalent part to a half width of flange is made to be arbitrarily changeable and the H-shape steel with the optional width of flange can be rolled. Therefore, the productivity is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an edging rolling machine for sections having flanges, and more specifically, for forming and forging rolling flanges of various dimensions for H-section steel and similar sections. This invention relates to an edging rolling machine used in the field of high precision rolling.

[Prior art] H-section steel and similar section steel are generally rolled using a universal rolling mill, and this method is shown in Fig. 7(a),
As shown in (b), a steel slab is roughly formed into a shape similar to an H shape in a breakdown mill 1, and then a web and a flange are formed in a universal rolling mill 2 equipped with upper and lower horizontal rolls 2° and left and right vertical rolls 2°. Reduce the thickness of Furthermore, the edging rolling mill 3 equipped with upper and lower horizontal rolls 3 is used to roll and forge the flange in the width direction to correct variations in shape and dimensions, but this edging rolling mill 3 is connected to the universal rolling mill 2 as shown in Figure 8. It is arranged as follows.

According to this rolling method, the thickness of the web and flange can be adjusted over a considerable range, and sizes with different cross-sectional properties can be rolled with the same roll. The layout shown in FIG. 7 is the most typical example, and a plurality of universal rolling mills 2 and edging mills 3 may be arranged.

By the way, as shown in FIG. 9, the rolling state of the edging rolling mill 3 is basically that the web 4 is restrained by a pair of upper and lower horizontal rolls 5 in the initial pass.
In the latter pass shown in FIG. 10, the flange single width Fs of the rolled material generally increases with repeated universal rolling, so clearances s and s' are forced to occur. These clearances s and s' are determined by the difference in rolling reduction and flange width expansion caused by changes in the temperature of the material to be rolled, changes in the steel type, or thicker or thinner product sizes, as well as changes in the pass schedule to optimize load distribution. It is also essential as an adjustment allowance for changes in rolling conditions or roll wear adjustment.

In conventional etching rolling equipment, clearances s and s' are unavoidable not only in reverse type multi-pass mills but also in single stand and one bus type continuous rolling mills, and generally s and s' are set to 1 mm or more. There is. Based on these basic conditions of edge rolling, the existing standards for rolled H-beams, both domestic and foreign, are such that the flange single width Fs shown in Figure 11 is constant within each designation series, and the change in web thickness Tw is The flange width FT is changing accordingly. From the viewpoint of usage technology, it is convenient for the flange width FT to be constant for each series, so rolled H-beam steel is inconvenient in the design and construction of building structures. In addition, the current JIS standard for flange width FT is 50 mm for large sizes.
With the recent needs for more efficient cross-sections and lighter weight of used parts, it has become necessary to manufacture even more intermediate sizes.

Furthermore, with the recent trends toward labor-saving and automation at construction sites, the dimensional accuracy required for rolled H-beams, which are the members of construction sites, has become more sophisticated.
There is a strong demand for higher precision in Web 0ff-cente1). However, in the conventional method, as shown in FIG. 10, due to the presence of clearances s and s' in the latter pass, the position of the web 4 of the rolled material does not accurately align with the center position FT/2 of the flange 6, Web center deviation is likely to occur.

Attempts to create various flange width dimensions by sharing rolls have been made since the creation of the universal rolling method for H-beam steel long ago, but the method shown in Figure 12 for the grooved roll method and the one shown in Figure 12 for the flat roll method Attempts have been made to induce flange buckling or center deviation as shown in Fig. 13, and to prevent buckling or center deviation by using an auxiliary guide device, but none of these attempts have been made. It has been difficult to maintain a stable and good edging rolling condition, and this has resulted in failures, and a dedicated edging roll has been used to manufacture each named series. Moreover, even if a dedicated etching roll was used, it was difficult to meet the above-mentioned demand for improved dimensional accuracy.

Therefore, in order to solve these problems, the applicant has
JP-A-62-77101, JP-A-63=154204
In this issue, we proposed a backup roll supported type of edging rolling mill. However, in this invention, the measures to prevent the tip of the flange from protruding during edge rolling of the material to be rolled are insufficient, and practical problems remain.

[Problems to be Solved by the Invention] The present invention has been made to solve the above-mentioned drawbacks, and is capable of steplessly adjusting the single width of a flange of a rolled material online without changing any roll tools. It is an object of the present invention to provide an edging rolling apparatus for a shape material having a high-quality flange, which is capable of performing edging and does not cause the tip of the flange to bite out during edging rolling.

[Means for Solving the Problems] The present invention advantageously solves the above-mentioned drawbacks, and the gist thereof is as follows: (1) The web restraining collar 7-1 is rotatably external to the shaft portion 7-2. A fitted horizontal roll 7 and a pair of backup rolls 9 that rollably contact the outer peripheral surface of the shaft portion 7-3.
and a means for displacing the backup roll 9 in a direction intersecting a straight line connecting the respective axes of the rolling material flange reduction operation roll 10 supported by the backup roll 9 and the horizontal roll 7 and the flange reduction operation roll 10. In the edging rolling machine for a section having a flange, the width P of the outer surface of the web restraining collar 7-1 that is in contact with the rolled material and has a side wall inclination angle γ is equal to the flange width of the shaped steel of the rolled material. Fs, and the side wall inclination angle α of the web restraint collar 7-1 that comes into contact with the side surface of the flange lowering operation roll 10 is set smaller than γ, and the side wall inclination angle α that comes into contact with the outer peripheral surface of the backup roll 9 is horizontal. Roll shaft part 7. ．． (2) a horizontal roll 7 having a web restraint collar 7-1 and a shaft portion 7-2; , a pair of backup rolls 9 that rollably abuts on the outer peripheral surface of the shaft portion 7-2, a rolling material flange rolling operation roll 10 supported by the backup rolls 9, and the horizontal roll 7 and a flange rolling operation. In an edging rolling machine for a profile having a flange, which has a means for displacing the backup roll 9 in a direction intersecting a straight line connecting the respective axes of the rolls 10, the web restraint collar 7-1 is connected to the rolled material. The width P of the outer side surface of the web restraint collar 7-1 which abuts and has the side wall inclination angle γ is formed to be smaller than the width Fs of the flange of the section steel of the material to be rolled, and the web restraint collar 7-1 abuts the side surface of the flange rolling operation roll 10. A flange type in which the side wall inclination angle α is set smaller than γ, and the inclination angle θ of the horizontal roll shaft portion 7-2 that contacts the outer circumferential surface of the backup roll 9 is set equal to or greater than the angle γ. This is a rolling mill for cutting and rolling materials.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 shows the main parts of an example edging rolling machine for a profile having a flange according to the present invention. In FIG. 1, 7 is a horizontal roll, which in this embodiment is a pair of left and right split type rolls. The pair of left and right split horizontal rolls 7 have web restraint collars 7-1 whose outer peripheral surfaces abut against the web of the material to be rolled, and which clamp and restrain the web of the material to be rolled during the rolling process;
It has an inclined shaft portion 7-2, and the shaft portion 7-2 is
It is fitted onto the drive shaft (roll main shaft) 8 and a rotational force in the direction around the shaft is applied by a key 50 . In addition, this split type horizontal roll 7 is provided so that the relative spacing between the left and right sides in the axial direction (direction of arrow Q) of the roll main shaft 8 can be freely adjusted. Although a drive mechanism for adjusting the relative spacing is not particularly shown, known means,
For example, any system can be adopted, such as a hydraulic cylinder type driven by a hydraulic branch pipe provided in the roll main shaft 8 or a screw type.

In FIG. 1, a web restraint collar 7-1 is rotatably attached to the outer periphery of the shaft portion 7-2 via a bearing 40 due to a problem related to the circumferential speed difference between the backup roll 9 and the web restraint collar 7-1. However, for rolled materials with a short flange width where the problem related to the peripheral speed difference is relatively small, the web restraint collar 7-1 and the shaft portion 7-2 are directly connected, as shown in Fig. 1(c). There is no problem even if it is an integrated structure. The web restraint collar 7-1 is integrally set with a lateral spacing in conjunction with the adjustment movement of the lateral spacing of the shaft portion 7-2. In the figure, reference numeral 9 denotes backup rolls, and a pair of them support the flange lowering operation rolls 10. The backup roll 9 is driven from a shaft portion 7-2 connected to the roll main shaft 8 by frictional force via a flange lowering operation roll 10.

The pair of backup rolls 9 move in a direction that intersects the straight line connecting the respective axes of the split horizontal roll 7 and the flange lowering operation roll 10, that is, in this embodiment,
It is displaced (opened and closed) in the direction of the arrow. Due to the displacement of the backup roll 9 in the direction of the arrow,
The flange lowering operation roll 1o is displaced in six directions indicated by arrows. Note that the displacement of the backup roll 9 in the direction indicated by the arrow is performed using a roll position adjustment mechanism (rolling down mechanism) using a conventional screw, hydraulic mechanism, lever arm mechanism, etc., which is known per se.

Moreover, since the flange rolling operation roll 10 is driven by the drive shaft 8 via the backup roll 9 with a preload force as described above, it is possible to produce a material suitable for smooth rolling.

As shown in FIG. 2, the web restraint collar 7-I is formed so that the width P of the outer surface that contacts the material to be rolled and has a side wall inclination angle γ is smaller than the single width Fs of the flange of the material to be rolled. The side wall inclination angle α of the web restraint collar 7-1 that comes into contact with the side surface of the operating roll 10 is set to be smaller than γ, and the inclination angle θ of the horizontal roll shaft portion 7-2 that comes into contact with the outer peripheral surface of the backup roll 9 is set. The angle is set to be equal to or greater than the angle γ, and furthermore, only the side end surface 9-1 with respect to the shaft portion 7-2 is configured to abut against the shaft portion 7-2. Further, the side end surface 10-1 of the flange rolling-down side outer circumferential surface 1O-5 of the flange rolling operation roll 10 has web restraint collars 7, . It is configured to be in close contact with the side wall of No. 1.

With such a device, it is possible to perform good edging rolling without causing any inconvenience during rolling down and shaping of the flange tip.

[Example] Hereinafter, the present invention will be explained based on examples thereof.

In the embodiment shown in FIG. 1, the maximum opening degree of the flange lowering operation port 10 is in the state shown in FIG. 3, and the minimum opening degree is in the state shown in FIG. 4. be. Therefore, the amount of variation in the overall width of the flange using the youngest son formula is (Lmax Lmln) x2.

For example, d = 200mm, d 2 = 200
If mm, d3=400mm, L max = 556mm, L +eln = 4
00mm, and one set of roll equipment can handle the variation range of 300IIIn in the total width of the flange required to manufacture a general H-section steel size of 100 to 400mm.

At this time, the diameter d4 of the web restraint collar 7-1 is approximately 1200 mm. All of the roll specifications are such that there are no problems with the existing rolling equipment configuration, and that they can be sufficiently accommodated by conventional roll manufacturing technology without any problems in terms of strength, durability, or processing.

Furthermore, if it is necessary to widen this adjustment range, the fifth
As shown in the figure, one backup roll 9a has a shaft portion 7-2.
The rolls may be configured so that the contact with the shaft portion 7-2 is cut off, only the other backup roll 9b maintains contact with the shaft portion 7-2, and the flange lowering operation roll 1o is supported by the backup rolls 9a and 9b. In this case, if the above roll dimensions are adopted, (L l1lix L 1n ) X 2 = 40
It becomes 0mm.

In FIG. 2(a), the inclination angle γ of the side wall of the web restraint collar 7-1 in contact with the rolled material 12 is determined by the product shape, universal rolling equipment, and operating conditions, and is usually in the range of 3 to 10". This is because if the flange inclination angle of the rolled material 12, which governs the sidewall inclination angle γ, is smaller than the above range, the universal roll will wear severely and the amount of rework to repair it will increase dramatically. This is because if the flange inclination angle of the rolled material 12 is larger than the above range, it becomes difficult to ensure a good rolling action of the flange, and the dimensional accuracy during actual operation deteriorates markedly.

Here, the width P where the outer surface 12-b of the web restraint collar 7-I contacts the inner surface of the flange of the material to be rolled 12 is preferably in the range of 115 to 415 of the flange width Fs of the material to be rolled. This was confirmed by the results of actual machine tests. In other words, if it is less than 1/5xFs, the play of the rolled material during rolling is a(
It was found that the edging could not be sufficiently controlled (swimming), leading to unstable edging, which was likely to cause buckling of the flange or defective shape of the flange tip. On the other hand, if it exceeds 415XFs, there is little room for the bulge due to etching at the inner corner of the flange tip to escape, and excessive force acts on the roll corner, which tends to cause roll breakage accidents, and the flange tip tends to bite. Understood.

The first base line that defines the side wall inclination angle γ of the web restraint collar 7-1 is a perpendicular line that passes through the reference point J1 and is perpendicular to the axis of the shaft portion 7-2. This is the intersection of a line extending horizontally from the circumferential surface of collars 7 to 1 and a line extending along the side wall surface of web restraint collar 7-1.

Further, the side wall inclination angle α of the web restraining collar 7-1 that comes into contact with the side end surface ILa of the flange-reducing side outer peripheral surface 10-b of the flange-reducing actuating roll 10 is set within the range of diagonal lines in FIG. 2(b). The minimum value of α is 1 degree when the side wall is vertical, and if it is smaller than this, it will be impossible to repair the roll when it wears out. Further, if α becomes larger than the shaded range, it becomes impossible to secure a margin C0, which will be described later, and the object of the present patent is not achieved.

Next, the second base line that defines the side wall inclination angle α is the reference point J
This is a perpendicular line that is perpendicular to the axial center line of the shaft portion 7-2 that passes through 2, and is parallel to the first reference line. The reference point J2 is the lower end point on the side wall surface of the web restraint collar 7-1 that defines the width P of the outer surface that comes into contact with the inner surface of the flange of the material to be rolled.

Further, the inclination angle θ of the horizontal roll shaft portion 7-2 that comes into contact with the outer circumferential surface of the backup roll 9 is set to a range from the same as the angle γ to γ+5 degrees. With this selection, the angle y1 (90 degrees - (θ -γ)) is 85 degrees or more and 90 degrees or less. If this angle is less than 85 degrees, the cross-sectional area of the outside FO of the flange tip is likely to be insufficient, while if it exceeds 90 degrees, the cross-sectional area of the inside Fl of the flange tip is likely to be insufficient, which tends to cause defects in the shape of the product.

Backup roll 9 and flange lowering operation roll 10
The abutting part is a simple cylindrical roll, or the side end surface 10-a of the flange rolling operation roll 1o is inclined by an angle (θ-α) over a length ρ as shown in FIG. 2(a). It is a truncated cone. The length ρ is less than half the roll diameter d1 of the 1° flange rolling operation roll, or usually ρ = (1/
It is desirable to select within the range of 3 to 1/10) X d l.

The side end surfaces of the horizontal roll shaft section 7-2 and the backup roll 9 are configured to abut at the side end surface 9- on the contact side with the horizontal roll shaft section 7-7.

By configuring each roll in this way, the flange rolling operation roll 10 includes a drive shaft 8, a horizontal roll shaft portion 7-
The web restraint collar 7-1 is driven by the rotation of the web restraining collar 7-1 and the backup roll 9, and is in close contact with the side wall of the web restraint collar 7-1, so that each contact portion rotates smoothly. In addition, during flanging rolling, a margin Cm that is effective for preventing the flange end bulge from bulging out, which is an escape area, can be secured on the outer peripheral end surface of the flange rolling operation roll 10 as shown in FIG. Etching is possible.

[Effects of the Invention] According to the present invention, the roll dimensions of the portion corresponding to one width of the flange can be arbitrarily changed on-line, so H-beam steel with an arbitrary flange width can be rolled, and it is possible to handle small-lot production of multiple sizes. This eliminates the need for roll replacement work, improving production efficiency and reducing roll tool costs.

Furthermore, since it is possible to consistently perform edge rolling with web restraint from the initial bath to the late bath for a specific product, dimensional accuracy can be dramatically improved. In particular, the conventional back-up roll supporting type edging rolling machine (JP-A-62-1999)
77101, Japanese Patent Application Laid-Open No. 63-154204) can be completely prevented from forming due to the protrusion of the tip of the flange, and roll breakage accidents caused by the protrusion can also be prevented.

Furthermore, since the flange lowering operation rolls with backup rolls installed at four locations can be individually adjusted, they can be used in an H-shape that is asymmetrical horizontally or vertically, as shown in Figures 6(a) and (b). The production of steel is also possible without any change of tools for flanging, simply by accumulating asymmetric reductions for each bath.

[Brief explanation of the drawing]

FIGS. 1(a), (b), and (c) are overall configuration diagrams of an edging rolling roll according to an embodiment of the present invention, and FIG. 2(a) shows a split horizontal roll, a backup roll, and a backup roll in FIG. 1(a). Partially enlarged explanatory diagram showing the relative position and dimensional relationship between the flange rolling operation roll and the rolled material, FIG.
) is a graph showing the relationship between the side wall inclination angle γ of the web restraint collar and the side wall inclination angle α of the flange rolling down operation roll, FIG. 3 is an explanatory diagram showing the maximum opening degree of the flange rolling down operation roll in FIG. 1, Fig. 4 is an explanatory diagram showing the minimum opening degree of the flange lowering operation roll in Fig. 1;
The figure is an explanatory diagram of the configuration of a backup roll for further increasing the maximum opening of the flange lowering operation roll in Figure 1, and Figures 6 (a) and (b) show an asymmetrical structure that can be manufactured using the present invention. A diagram showing an example of a product cross section of H-section steel. Figures 7 (a) and (b) are conventional examples of the method of rolling H-section steel. Figure 8 is a configuration diagram of a universal mill and an edging mill. Figure 9 is an initial example. A conceptual diagram of the state of edge rolling for buses, Figure 10 is a conceptual diagram showing the conventional state of edge rolling for late-stage buses, Figure 11 is an explanatory diagram of flange-related dimensions of H-section steel, and Figures 12 (a) and (b). 13 is an explanatory diagram of the state of defective edging rolling by the conventional grooved roll method.
Figures (a) and (b) are explanatory diagrams of defective etching rolling conditions by the conventional flat roll method. 1... Breakdown mill 2... Universal rolling mill 3... Edging rolling mill 7... Horizontal roll 7-1... Web restraint collar 7-2... Shaft part 8... Drive shaft (Roll main axis) 9...Backup roll 10...Operating roll for rolling the rolled material flange and 4 others Fig. Wave Rolled material Fig. Inclination angle γ (degrees) Fig. Fig. Fig. Fig. Fig. Fig. Fig. Figure Figure Figure (a) (b) Figure

Claims (1)

[Claims] 1. The web restraint collar (7_-_1) is attached to the shaft portion (7_-_
2), a horizontal roll (7) rotatably fitted on the outside, a pair of backup rolls (9) rotatably abutting the outer peripheral surface of the shaft portion (7_-_2), and the backup rolls (9). Displace the backup roll (9) in a direction that intersects a straight line connecting the axes of the supported rolling material flange reduction operation roll (10), the horizontal roll (7), and the flange reduction operation roll (10). In the edging rolling machine for a profile having a flange, the web restraint collar (7_-_1) comes into contact with the rolled material and the side wall inclination angle γ is
The outer surface width P has the flange width Fs of the section steel to be rolled.
A web restraining collar (
The side wall inclination angle α of 7_-_1) is set smaller than γ, and the inclination angle θ of the horizontal roll shaft portion (7_-_2) that contacts the outer peripheral surface of the backup roll (9) is set to the angle γ.
An edging rolling device for a profile having a flange, characterized in that the edging rolling device is set to be equal to or higher than . 2 Web restraint collar (7_-_1) and shaft part (7_-_
2) and a horizontal roll (7) having a shaft portion (7_-_
2) a pair of backup rolls (9) that rollably abuts on the outer circumferential surface of the roller, an operating roll (10) for rolling the rolled material flange supported by the backup rolls (9), and the horizontal roll (7) and the flange. Rolling down operation roll (
10) In the edging rolling machine for a profile having a flange, the apparatus has a means for displacing the backup roll (9) in a direction intersecting the straight line connecting the respective axes of the web restraint collar (7_-_1). The outer surface width P that contacts the rolled material and has a side wall inclination angle γ is formed to be smaller than the flange single width Fs of the section steel of the rolled material,
The side wall inclination angle α of the web restraint collar (7_-_1) that comes into contact with the side surface of the flange lowering operation roll (10) is set to be smaller than γ, and the horizontal roll axis that comes into contact with the outer peripheral surface of the backup roll (9). Part (7＿−＿
2) An edging rolling apparatus for a profile having a flange, characterized in that the inclination angle θ is set to be equal to or greater than the angle γ.