JPH035011A - Rolling guide for shape steel - Google Patents

Abstract

PURPOSE:To stably guide a rolling material to a rolling mill arranging a elevat ing device capable of adjusting the roller position vertically according to the rolling condition to either tapered rollers of a guide frame or flat rollers thereof. CONSTITUTION:The flat rollers 5 provided on the guide frame 6 are held freely rotatable through an elevating device l' composed of a hydraulic cylinder and a link connected to its actuating end so that it can swing freely. Independently of the vertical movement of a base plate 7 or the vertical movement of a guide body part 3, it can individually move vertically and adjust the position of rolls 4. Consequently, the kinds of the guides that must be prepared in advance can be reduced drastically, the recombination work of the giudes is omitted and the rise of cost can be prevented. Further, since the height and width of the guide can be adjusted, the dimensional accuracy of a shape steel product is improved.

Description

Detailed Description of the Invention (Industrial Application Field) This invention is suitable for use when introducing rough-rolled shape steel materials (H-shape, groove-shape, I-shape, etc.) into a finishing universal rolling mill. It is about a guide.

The explanation will be given below by taking H-beam steel as an example.

(Conventional technique) H-beam steel is made by rolling raw materials such as blooms and beam blanks obtained by continuous casting into rough-shaped steel pieces in a rough rolling process, and then rolling them into rough-shaped pieces using a rough universal rolling mill and an edger. It was rolled in multiple passes in a universal mill group, and then passed through a finishing universal mill to be finished to the desired cross-sectional dimensions.

Universal rolling mills used for rough rolling or finish rolling of H-section steel generally consist of a pair of horizontal rolls that sandwich the material above and below, and a pair of vertical rolls that sandwich this horizontal roll on both sides. However, when rolling H-section steel using such a conventional universal rolling mill, there are problems as described below.

In other words, the flange width of H-section steel can be changed freely as long as it is within the roll width of the vertical roll, but the web height d is d, where t is the flange thickness and W is the roll width of the horizontal roll. Since it is determined by =W+2t, a horizontal roll having a roll width that satisfies this condition is used (see FIG. 7).

However, since the horizontal rolls installed in universal rolling mills usually roll down the inner surface of the flange of the material with the side of the roll, there is severe wear in that area, and it is necessary to Requiring frequent replacement.

In addition, when d = W + 2t of H-section steel, there are several types of H-section steel with a constant outer rectangle with a constant web height and different flange thickness even if they have the same designation size, so the roll width of the horizontal roll can be changed by changing the flange thickness. It is necessary to make adjustments accordingly, but in this case, replacing the rolls not only hinders productivity, but also increases the number of man-hours required for replacement, and it is necessary to keep a large number of rolls.

Furthermore, in order to improve the dimensional accuracy of products, it is necessary to frequently process the roll end faces of horizontal rolls, which increases the roll consumption rate.

To address these problems, a variable width roll has been proposed in which the roll width of a horizontal roll can be arbitrarily changed by online remote control (Japanese Patent Laid-Open No. 61-262
(See Publication No. 407).

A rolling mill incorporating horizontal rolls having such a structure requires a guide that is linked to changes in the roll width of the horizontal rolls.

Prior art related to this point is, for example, Japanese Patent Application Laid-Open No. 63303
604, Japanese Patent Application Laid-Open No. 64-2715, etc., but in particular, the technique of manufacturing a shaped steel with a constant outer rectangle by rolling down the web part of a shape steel material (see the specification of Japanese Patent Application No. 63156823) ), the above-mentioned problems cannot be solved simply by applying a guide that has such a mechanism.

Note that Japanese Utility Model Application Publication No. 51-22132 proposes a web guide in which the vertical distance between the guides can be adjusted, but since such a guide has a structure that contacts only the web of material, stable guidance is not possible. However, it was not possible to achieve this, resulting in flaws in the web portion, and disadvantages such as lack of stability in cross-sectional dimensions (center deviation, insufficient leg length, etc.).

(Problem to be solved by the invention) To propose a new guide that can stably guide rolled material to a finishing universal rolling mill, regardless of the size of the shaped steel product to be rolled or the rolling method of the shaped steel product. It is the purpose of this invention to do so.

(Means for Solving the Problems) The present invention provides guides that are disposed on the exit and entry sides of a finishing universal rolling mill and that guide the shape material having webs and flanges. Equipped with a pair of upper and lower guide body portions each having a variable width left and right and movable up and down, which guide the material along the rolling pass line in contact with the inner surface and the web connected thereto, each guide body portion has a flange of the material. A guide frame is provided with a tapered roller and a flat roller that roll in contact with each of the width ends, and the position of the tapered roller or the flat roller can be adjusted vertically depending on the rolling situation. This is a guide for rolling section steel, characterized in that it is equipped with an elevating device that makes it possible to move up and down.

Now, FIG. 1 shows the outline of the configuration of a guide for rolling a section steel according to the present invention, in which the number 1 is disposed at the finishing universal rolling mill, the number 2 is disposed at the exit side and the entry side of the finishing universal rolling mill 1, This is a guide for guiding the shape material having webs and flanges.

The front and side views of this guide 2 are shown in Figure 2, respectively.
As shown in Fig. 3, the blank is guided along the rolling pass line p by contacting the inner surfaces of the left and right flanges of the shape blank and the web connected thereto, and is variable in width left and right and movable up and down. It consists of a pair of upper and lower guide main body parts 3.

Each of these guide body portions 3 is provided with a guide frame 6 equipped with a tapered roller 4 and a flat roller 5 that roll in contact with each of the flange width ends ha of the raw material. The roller 5 is equipped with an elevating device that allows its vertical position to be adjusted according to the rolling situation! , l' are provided.

Here, FIG. 2 above shows only the lower side of the guide according to the present invention, and the right half shows the case where the tapered roller 4 is raised and the flange width end is guided by it. The left half shows the case where the flat roller 5 is raised and the flange width end is guided thereby.

In the guide configured as above, each guide body part 3
As shown in FIG. 2, a part of the base plate 7
The bearings are screw-fitted to each of the supported screw shafts 8 having a right-hand thread and a left-hand thread, and a driving source 9 connected to one end of the screw shaft 8.
Width adjustment is performed by moving left and right by the operation of .

Further, a slide rod 7-2 having a screw portion 7-1 formed at one end is connected to the lower surface of the base plate 7, as shown in FIG. 3, and a worm wheel 7 is screwed onto the screw portion 7-1. -3, a worm (not shown) that engages with the worm wheel 7-3, and a shaft 7 that has one end connected to the drive source 7-4 and the other end connected to the worm.
-5 and a guide block 7-6 that guides the slide rod 7-2, the pairs of upper and lower guide body portions 3 are individually raised and lowered up and down.

Further, the guide frame 6 installed in each guide main body part 3 includes a slide shaft 8-1 with a screw, a worm wheel 8-2 that engages with the threaded part, one end of which is connected to a drive source 8-3, and the other end of which is connected to a drive source 8-3. It is held via a lifting device l consisting of a shaft 8-4 engaged with a worm wheel 8-2 via a worm, and by rotating the shaft 8-4, the guide frame 6 is separated from the guide body portion 3. Can be moved up and down individually.

As shown in FIG. 3, the flat roller 5 provided on the guide frame 6 is moved via an elevating device l' consisting of a hydraulic cylinder 9-1 and a link 9-2 swingably connected to the working end of the hydraulic cylinder 9-1. The roll 4 is rotatably held by the base plate 7, and can be moved up and down independently of the elevation of the base plate 7, that is, the elevation of the guide body portion 3, to adjust the position of the roll 4.

In this example, the elevating device β' is provided on the flat roller 5, but it may be provided on the tapered roller 4).

(Function) The material for H-section steel that has undergone rough rolling in the rolling equipment for section steel as shown in Fig. 4 has a flange portion with an angle of θ-3 to 6° as shown in Fig. 5(a). The material, which is tilted to a certain degree and has such a cross-sectional shape, will be conveyed to the finishing universal rolling mill.

In finishing universal rolling, first pass rolling is performed to make the inclination θ of the flange of the material zero to zero, as shown in FIG. 5(b). At this time, the guide frame 6 is Among the rollers installed in the flange, only the tapered roller 4 is brought into contact with the width end portion of the flange.

When rolling the second pass using reversible rolling after the completion of the first pass rolling, since the inclination θ of the flange is almost zero, it is moved back to a predetermined position using the lifting device and then rolled as shown in Fig. 6 ( b
), the height is adjusted by the elevating device 2' of the flat roll 5, thereby guiding the flange end face of the material.

As explained above, in this invention, the flange end of the material can be guided using appropriate rolls depending on the rolling conditions, so there is no need to rearrange the guides.

In addition, the guide body portion 3 that guides the inner surface of the flange and web surface of the material is divided into two parts in the width direction of the material to enable width adjustment and vertical position adjustment. ' → d (Fig. 5 (b
) to Fig. 5(C)), even when applied to a rolling method that compresses in the height direction, it can be easily followed by accurately adjusting the width of the guide main body portion 3, and the shape of the shape steel product Web - 10 - When changing the thickness, it is only necessary to operate the elevating mechanism connected to the guide main body portion 3, so there is no need for extra work such as replacing the guide.

In the above description, a rough rolling material is rolled in two passes, but depending on the product size and the amount of rolling reduction, the entire process may be completed in one pass.

(Effects of the Invention) Thus, according to this invention, the number of types of guides that must be prepared in advance can be significantly reduced, and the task of rearranging guides when changing the size of product shaped steel can be omitted. Cost increases can be prevented.

Further, according to the present invention, the height and width of the guide can be adjusted in accordance with the flange shape of the shape steel material, so the dimensional accuracy of the shape steel product can be improved and the product quality can be improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of a guide according to the present invention, FIG.
Figure 3 is a front and side view of Figure 1, Figure 4 is a schematic diagram of the section steel rolling equipment, Figure 5 (a)
) (b) and (c) are diagrams showing the cross section of the rolled material at each rolling stage, Figures 6 (a) and (b) are diagrams explaining the situation of the guide at the flange width end, and Figure 7 is the diagram of the conventional technology. It is an explanatory diagram. 1... Finishing universal rolling machine 2... Guide 3... Guide body part 4... Taper roller 5... Flat roller 6... Guide frame 7... Base plate 8... Screw shaft 9 ...Drive source 10...
・Level plate Fig. 5 (a) (C) Fig. 6 JP-A-3 5011 (7) Fig. 7

Claims (1)

[Scope of Claims] 1. A guide disposed at the exit and entry sides of a finishing universal rolling mill for guiding a section material having a web and a flange, which Equipped with a pair of upper and lower guide body portions each having a variable width left and right and movable up and down, which guide the material along the rolling pass line in contact with the connecting web, each guide body portion has a guide body portion that guides the material along the rolling pass line. A guide frame is provided with a tapered roller and a flat roller that roll in contact with each other, and the position of either the tapered roller or the flat roller can be adjusted vertically depending on the rolling situation. A guide for rolling section steel characterized by being equipped with a lifting device.