JPH0532128B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to an edging rolling device for shaped steel having flanges, and more specifically, a rolling device used in the field of shaping and forging flanges of various dimensions for H-shaped steel and similar shaped steel. It is related to. (Prior art) H-shaped steel and similar shaped steel are generally rolled using a universal rolling mill, but this method is
After roughly shaping the steel billet into a shape similar to an H shape using the breakdown mill 1 shown in the figure, the thickness of the web and flange is rolled down using the universal rolling mill 2 equipped with upper and lower horizontal rolls 2' and left and right vertical rolls 2''. Furthermore, an edging rolling mill 3 is arranged in series with the universal rolling mill 2, as shown in Fig. 7, in order to reduce and forge the flange in the width direction and correct variations in shape and dimensions. The thickness of the flange and flange can be adjusted within a considerable range, and the same roll can roll sizes with different cross-sectional properties.The layout shown in Figure 6 is the most typical example, and the layout shown in Figure 6 is the most typical example. In some cases, a plurality of edging rolling mills 3 are arranged.By the way, the rolling state of the edging rolling mill 3 is as follows.
As shown in Fig. 8, in principle, the web portion 4 is restrained by a pair of upper and lower horizontal rolls 5 in the initial pass, but in the latter pass, as shown in Fig. 9, the flange width of the rolled material is universal. Since it increases with repeated rolling, the occurrence of clarity S is unavoidable. Based on the basic conditions of edge rolling, the current standards for H-section steel, both domestic and foreign standards, are such that the flange single width F _S in Figure 10 is constant within each nominal series, as illustrated in Table 1. It's getting old,
The flange width F _T changes as the web thickness T _W changes. In terms of usage technology, this means that F _T
It is contradictory to the fact that it is convenient for the value to be constant within each designation series, and the current situation is that this is forced on the field of application due to technical manufacturing constraints.

[Table] Furthermore, as shown in Fig. 9, due to the clearance S in the latter pass, the position of the web 4 of the rolled material does not accurately align with the center position F _T /2 of the flange 6, resulting in so-called center deviation (Web off -center). Attempts to create various flange width dimensions by sharing rolls date back to the beginning of the universal rolling method, but the grooved roll method was the first.
Figure 1, the flat roll method causes buckling or center deviation as shown in Figure 12, and
As shown in Figure 3, attempts have been made to prevent the buckling and center deviation by using an auxiliary guide device 6, but all of these attempts failed because it was difficult to maintain a stable and good rolling condition. Currently, each series is manufactured using its own special cutting roll. (Problems to be Solved by the Invention) The purpose of the present invention was to solve the above-mentioned drawbacks, and the purpose of the present invention is to adjust the one-side width of the flange steplessly online without changing the roll tool. The purpose of the present invention is to provide a rolling device having a function of adjusting the diameter of rolling rolling rolls. (Means for Solving the Problems) The present invention advantageously solves the above-mentioned problems. The roll 7 is divided into two parts with an adjustable interval in the direction of the driving shaft, and an eccentric ring 10 is rotatably fitted via a bearing on the outer peripheral surface of the aging roll 7 adjacent to the operating surface in the axial direction. The setting position of the eccentric ring 10 is set by the eccentric ring position setting device 1.
3, and furthermore, a web restraint ring roll 12 is rotatably fitted on the outer peripheral surface of the eccentric ring 10 via a bearing concentrically with the eccentric ring 10. It is a rolling equipment. The configuration of the present invention will be explained in detail below with reference to the drawings. In FIG. 1, there are upper and lower pairs of split-type etching rolls 7 that roll, shape and forge the flange end portion of the rolled material, and each of the etching rolls 7 is spaced apart from each other in the axial direction with respect to the drive shaft 8. is freely adjustable and rotatably supported by the drive shaft 8. Further, an eccentric ring 10 is rotatably mounted on the outer periphery of each etching roll 7 via a bearing 9, and a web restraining ring roll 12 is further provided for guiding the material to be rolled to a proper rolling position and restraining the web. is rotatably mounted concentrically on the outer periphery of the eccentric ring 10 via a bearing 11. That is, while the etching roll 7 is forcibly driven integrally with the drive shaft 8, the web restraining ring roll 12 is rotatable independently of the rotation of the etching roll 7 and is not driven. Eccentric ring 1
0 is rotated by the eccentric ring positioning device 13 to an appropriate position according to the rolling conditions, that is, the desired flange single width dimension F _S and then fixed. In this way, the relative distance between the restraining surface of the web corresponding to the flange single width F _S of the rolled material shown in Fig. 10 and the edging surface of the flange tip (hereinafter referred to as the roll flange single width) can be changed steplessly. , it becomes possible to create the entire width of the flange of the product steplessly. (Examples) The present invention will be described in detail below based on examples thereof. In the embodiment shown in Fig. 1, the roll flange single width L is maximum at the eccentric ring 10 as shown in Fig. 2.
When the center of , that is, the center of the web restraint ring roll 12, reaches the lowest point, and the third
This is when the center of the web restraining ring roll 12 is at the highest point as shown in the figure. Therefore, the amount by which the total width of the flange can be varied by this method is (L _nax −L _nio )×2. For example, if the diameter d ₁ of the edging roll 7 of the flange end edge part is 600 mm, the outer diameter d ₂ of the web restraint ring roll 12 is 900 mm, the outer diameter of the eccentric ring 10 is 800 mm, and the eccentricity E of the eccentric ring is 50 mm. L _nax = 200mm, L _nio = 100mm. The manufacturing range of flange width in actual factories is generally 50 to 150 m/m for central mills, 100 to 200 m/m for large and medium mills, and 200 to 300 m/m for large mills, so according to this method, one type of roll configuration is possible. It can be handled by Furthermore, if it is necessary to expand the manufacturing range of the flange width, the eccentric ring eccentricity E
Just make it bigger. By the way, in the general rolling setting state except for the maximum and minimum points, the web restraint position and the flange cutting position are not on the same plane. In FIG. 4, when the eccentric angle θ of the eccentric ring is set as shown, the eccentric distance M _E and the roll flange width are as follows: M _E =Esinθ L=Ecosθ+(d ₂ −d ₁ )/2. Actual examples of θ, M, and L are shown in Table 2.

[Table] The maximum amount of deviation (eccentric distance) in the contact position between the web and the flange is M _E,MAX = E = 50 mm, which is practical considering the rigidity of the rolled material and the simultaneous continuous rolling condition of the universal mill. This is a value that poses no problem. Incidentally, the eccentric angle θ of the eccentric ring is selected so that the eccentric distance M _E is between the universal rolling mill 2 and the edging rolling mill 3 in FIG. In this way, when passing the material from the universal rolling mill 2 to the edge rolling mill 3, the insertion force of the universal mill passes through the idle web restraint roll 12, and the kicker passes through the edge roll 7 of the edge rolling mill 3. will be carried out. When passing the material from the edge rolling mill 3 to the universal rolling mill 2, the material to be rolled is bitten by the edge roll 7 and pushed into the idle web restraint roll 12, and the kick-out is carried out by the universal rolling mill. It is withdrawn at 2. Since the intermediate rolling section is rolled by the driving force of the universal rolling mill 2 and the edging rolling mill 3, smooth threading and rolling are ensured even if a non-driven web restraint ring roll 12 is used. Furthermore, during multi-pass rolling, the fixed position of the eccentric ring 10 shown in FIG. 1 can be adjusted online for each pass using the eccentric ring position setting device 13, so that a consistent web restraint rolling state can be maintained from the initial pass to the latter pass. , dimensional accuracy regarding center deviation, which is considered a problem in rolled H-section steel, is improved. In addition, since the web restraint ring roll 12 is rotatably attached to the eccentric ring 10,
When the edge of the flange of the material to be rolled is rolled by the edge roll 7, the web restraint ring roll 12 that restrains the web surface of the material to be rolled is used to prevent the peripheral surface of the roll from being covered, regardless of the circumferential speed of the edge roll 7. Rotates only when it comes into contact with rolled material. Therefore, scratches on the surface of the rolled material and vertical warping of the rolled material due to the difference in circumferential speed between the edge roll 7 and the web restraint ring roll 12 do not occur, and wear and seizure of the rolls are also prevented. can. Furthermore, since the etching roll 7 and the web restraint ring roll 12 in the present invention are divided into two parts with the interval adjustable in the direction of the drive shaft, they can of course be used for multiple sizes depending on the web height dimension of the H-shaped steel, as well as for left and right sides. For example, the space between the rolls can be used to accommodate other mechanisms in addition to intervening the mechanism of the eccentric ring positioning device 13 of the present invention. Note that by dividing the roll into two parts, the material to be rolled is constrained only on both sides of the web, but in order to modify the shape of the material to be rolled, which is the object of the present invention, it is not necessary to constrain the entire surface of the web. It was confirmed that the effect was sufficient. In the above explanation, the H-shaped steel was explained, but it goes without saying that the apparatus of the present invention can also be applied to an edging rolling mill for shaped steel similar to the H-shaped steel having flanges, such as I-shaped steel and channel steel. . (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 adjusted on-line using a conventional edging rolling machine, with relatively simple additional equipment and low cost. Flange width dimension H
Shaped steel can be rolled, making it possible to handle small-lot production of multiple sizes, and eliminating the need for roll replacement work, improving production efficiency. Furthermore, since it is possible to perform consistent web constraint edging rolling for a specific product from the initial pass to the latter pass, the improvement in dimensional accuracy, mainly in correction of center deviation, is extremely large.

[Brief explanation of the drawing]

Figures 1a, b, and c are overall configuration diagrams of the edging roll according to an embodiment of the present invention; Figure 2 is an explanatory diagram showing the maximum opening degree of one roll flange width in Figure 1;
The figure is an explanatory diagram showing the minimum opening degree of one width of the roll flange in Fig. 1, Fig. 4 is an explanatory diagram showing the relative positional relationship between the horizontal roll and the web restraint ring roll of the flange tip edge part, and Fig. 5 is an explanatory diagram showing the present invention. Layout diagram of universal mill and etching mill in case of
Figures 6a, b, c, and d are conventional examples of the method of rolling H-section steel, Figure 7 is a configuration diagram of a universal mill and an edge mill, Figure 8 is a conceptual diagram of the initial pass of the edge rolling state, and Figure 9 The figure is a conceptual diagram showing the conventional state of edge rolling in the latter pass. Figure 10 is an explanatory diagram of flange-related dimensions of H-beam steel. Figures 11 a and b show the situation of defective edge rolling by the conventional grooved roll method. Explanatory diagrams, Figures 12a and 12b are explanatory diagrams of defective etching rolling conditions by the conventional flat roll method,
FIGS. 13a and 13b are explanatory diagrams of a defective edging rolling situation in which an auxiliary guide device is also used. 1...Breakdown mill, 2...Universal rolling mill, 3...Edging rolling mill, 4...Web, 5...Horizontal roll, 6...Flange, 7...
Edging roll, 8... Drive shaft, 9... Bearing,
10... Eccentric ring, 11... Bearing, 12... Web restraint ring roll, 13... Eccentric ring position setting device, S... Clearance.

Claims (1)

[Claims] 1 In an edge rolling machine for flanges of H-shaped steel and similar shaped steel, the left and right edge rolls 7
An eccentric ring 10 is rotatably fitted to the outer circumferential surface of the etching roll 7 adjacent to the operating surface in the axial direction via a bearing. 10 setting positions are adjustable via an eccentric ring position setting device 13, and further, concentrically with the eccentric ring 10,
This is an eccentric ring type etching rolling device in which a web restraint ring roll 12 is rotatably fitted on the outer peripheral surface of the eccentric ring 10 via a bearing.