JPS61172605A - Rolling installation of shape having flange - Google Patents

Abstract

PURPOSE:To manufacture efficiently H-beams of various sizes by combining the turning of a shifting frame and the vertical movement of a rolling reduction device for freely setting the arranging angle of a skew roll. CONSTITUTION:Skew rolls 15, 15A, 16, 16A are adjusted to optional angles by rolling reduction devices 20, 20A incorporated in rolling stands 19. Further, roll gaps and roll angles are adjusted by moving shifting frames 40 mounted on the roll stands 19 in the axial directions of skew rolls 15, 15A, 16, 16A with respect to a sole plate 55. The roll axes of skew rolls 15, 15A, 16, 16A are slanted in the rolling and vertical directions respectively, by combining the vertical movements of the devices 20 and the turnings of the frames 40, to adjust freely the arranging angles of the rolls 15,.... In this way, shapes having flanges of various sizes are efficiently manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention provides a method for producing various sizes of flanged profiles, namely H-shaped, channel-shaped and similar profile products.
This relates to a rolling device that can be freely created in the rolling process.

(Prior Art) Currently manufactured W44 piles have a wide range of wetlands, cross-sectional shapes, and dimensions, and are characterized by a large number of one type and size. In order to produce these shapes of many types and sizes, known conventional rolling machines require the provision of a large number of rolling rolls and their associated equipment. Therefore, the loss in the number of roll changes and the required time is also large. Fig. 11 shows an example of a conventional rolling equipment row for rolling a section having flanges and a roll hole shape corresponding to the rolling equipment. Fig. 11(a) From rough rolling to finish rolling, double or triple rolling is used! An example is shown in which I-type rolling mills are arranged to roll I-shaped steel and channel steel,
In Figures 11(b) and (C), double or triple rolling mills are arranged for rough rolling, and universal rolling mills are arranged for intermediate rolling and finishing rolling to roll H-shaped steel and channel steel. Further, FIG. 11(d) shows an example in which a double or triple rolling mill and a universal rolling mill are used as appropriate for rough rolling, intermediate rolling, and finishing rolling to roll a straight steel sheet pile. In the conventional rolling method as shown in FIG. 11, rolling rolls and guides as accessories for the rolling rolls are used from rough rolling to finish rolling according to the product type and size to be manufactured. , in principle, must be prepared exclusively, therefore diversification of product dimensions,
It has the disadvantage that it is difficult to meet customer needs such as expanding the range of production due to high costs.

As a specific example, the case of H-beam steel will be described below.

With recent advances in welding methods, steel plates are welded together and assembled. Production of so-called pill-shaped H-section steel is increasing. The reason for this is that H-shaped steel products of any size can be manufactured freely according to needs. Typical examples include H-section steel whose web thickness is relatively thin compared to the thickness produced by conventional rolling methods, or product series of H-section steel with various flange thicknesses that keep the outer width of the web constant. These are important needs.

When used as a beam member, H-beam steel with various flange thicknesses and a constant outer web width are advantageous in terms of joining and construction between beams. The reason why it is not manufactured is as follows.

Figure 12(a) shows a typical example of a conventional H-section steel rolling equipment row, in which one breakdown rolling mill 1 (BD)
, followed by a 40-unit universal rolling mill (RU)
The rolling mill consists of a 40/jar rolling mill (E) group 2 (RU-E) and a finishing universal mill 3 (FU).

FIG. 12(b) shows each rolling mill 1 in FIG. 12(a),
Figure 13 shows the 4°5.6 shape of each rolled material shaped with 2°3 rolls, and shows the relationship between the rolling rolls and the material to be rolled in the universal rolling method for rolling H-section steel. Due to the functionality of the universal rolling mill, the dimensions that can be freely changed for the same set of roll pairs during rolling are the gap 9 (web thickness 9) between the upper horizontal roll 7 and the lower horizontal roll 8, and the left and right vertical dimensions. There is only a gap 12.13 (flange thickness 12.13) between the rolls to' and tt. Therefore, the web thickness 9 and flange thickness 12.13 of the H section steel can be changed, but the inner web width ■ v has to remain constant.As a result, when rolling a series of H-section steel products with different thicknesses, if the left and right flange thicknesses 12.13 are changed, the inner web width fill and the left and right flange thicknesses 12.13 will naturally change. The web outer width, which is the total of 0, has to be changed to various dimensions.

(Problems to be Solved by the Invention) As shown in No. 145J, an H-beam steel rolled by a conventional rolling apparatus has a constant web inner width Iw and a flange thickness Tfl.
, the outer web width Ow1°0-2 changes as Tf2 changes, resulting in a so-called product series with a constant inner web width, and it is difficult to produce a product series with a constant outer web width. If a series of H-beam steel products with a constant outer web width Ow are to be manufactured using the conventional rolling method using a universal rolling mill, all steps of rough rolling, intermediate rolling, and finishing rolling must be carried out according to changes in the inner web width. Since most of the upper and lower horizontal rolls in the machine are prepared, a large amount of roll manufacturing is required, and the rolls must be frequently rearranged.

It is basically difficult to produce various sizes of a series of the same product in small lots for sections having flanges other than H-section steel.

The present invention eliminates the drawbacks of these known conventional rolling apparatuses and provides a rolling apparatus that efficiently produces H-section steel of various sizes even with a small loft. Of course, the present invention can also be applied to a rolling apparatus for producing various sizes of shapes having flanges other than H-beams, such as channel shapes, sheet piles, etc.

(Example) Below, the rolling method according to the present invention will be described based on an example, first with reference to the drawings.

Figure 5 shows an example of a row of rolling equipment for manufacturing H-section steel.

Reference numeral 14 in FIG. 5 is an example of a sizing mill of an oblique roll type which is a rolling apparatus of the present invention, and the functions of this mill will first be briefly explained.

Figure 2 shows an overview of the configuration and functions of the rolls installed in a diagonal roll sizing mill.1 Top corner 1tl
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As shown in the front view (a) and the side view (b) of FIG. , as shown in Fig. 2 Ca), the web is widened by the diagonal force generated when the diagonal roll contacts and rolls down the web portion of the input side rolled material 17 having an H-shaped cross section near the flange. It also has the effect of widening the web by pushing and expanding the inner surface of the flange of the H-section steel with the outer surface of the diagonal roll. These two web widening functions can perform their functions depending on the amount of web widening, either by their individual actions or by the synergistic effect of the two actions.

In other words, since the roll has a structure in which the direction of the axis of the roll can be freely changed three-dimensionally as shown by θH2θV in the figure, a widening force based on the oblique force is applied to the material being rolled. This is a rational and efficient widening rolling method.

An overview of the rolling method according to the present invention will be explained using FIGS. 7 and 3.

The structure of the oblique roll type sizing mill according to the present invention is as follows:
The structure is significantly different from the conventional shape rolling mill shown in Japanese Patent Application Laid-Open No. 59-202101. In most conventional profile rolling mills, the axes of the rolls are fixed in a direction perpendicular to the rolling direction, whereas in the present invention, the axes of the left and right rolls are fixed as shown in the plan view of Fig. 7. The direction of S is not perpendicular to the direction of movement of the material.

It has an angle θH and can be changed arbitrarily. In other words, the left and right rolls face each other in the direction of movement of the material and are "wedge-shaped" in a "skewed" manner, which is defined as a "skewed roll" in the present invention. Further, as shown in the front view of FIG. 3, it can be made parallel to the horizontal plane, or it can be changed to have an arbitrary angle θV.

The synergistic effect of these two factors allows the web of rolled material to be stretched easily and efficiently. That is, the web inner width Ill of the input side rolled material 17 changes to l1l12 in the exit side rolled material 23, and the web outer width also changes from Owl to 0w2 to an H-shaped cross section 24.

Hereinafter, the rolling apparatus for a section having a flange according to the present invention will be explained in detail.

The main components of the sizing mill of the present invention are shown in FIGS. 4 and 6.
, 18.18A rotatably and at the angle θV shown in FIG.
A stand 19 with a built-in lowering device 20 and 2OA that can be adjusted arbitrarily. Diagonal roll 15, 15A, ill.

18A to the angle θH shown in FIG. 7. Skew angle setting devices 41 to 43. Diagonal roll width setting devices 50 to 52. which arbitrarily adjust the width of the skew rolls 15.15A and 18.18A according to the size of the product 17. These are the sole plate 55 on which these are loaded and the driving devices BO to B4 that drive the oblique rolls. With these devices, it is possible to roll a shaped material having a flange by arbitrarily setting θV and θH of the oblique roll according to the product size.

Below, each device will be explained in detail.

Referring to FIG. 41, the means for setting the roll gap and adjusting the angle θV of the skew rolls 18 and 18A will be explained. The roll gap between the skew rolls 18 and 18A drives the rolling down motors 21 and 21A according to the thickness of the product, and this driving force is applied to the worm wheel 23° 23A, the rolling down screw 24.24A, the nuts 25 and 25A, and the chock 28.
, 28A, 29, 29A to roll axis 2?
, 27A, and is set by moving the axes up and down while keeping them parallel. In this case clutch 28°2111
Leave A connected.

Next, the angle θV of the diagonal roll is determined by the clutch 28° 28A
By disengaging the chocks 29° 29A on the anti-skew roll side and driving the reduction motors 21, 21A, the worms 22, 22A, worm wheel 23, 23A% reduction screws 24, 24A, and screws on the anti-skew roll side are removed. ) 25 and 25A, it is set by moving up and down. At this time, chocks 2B, 28A, 29, 29
A is tilted by an angle θV.

The inclination between the chocks 28, 28A, 29, 29A and the reduction screw 24° 24A is smoothly operated by a sliding spherical seat. Further, the axial force applied to the oblique rolls is supported by the stand 18 via chocks 29 and 29A. This support relationship when the angle θ9 is set and the roll axis is tilted is as shown in FIG. Even if the shaft 27 is tilted, it is supported and operated smoothly.

A skew angle device for arbitrarily adjusting a skew roll to an angle θH will be described with reference to FIGS. 1, 8, and 9.

The stand 19 with built-in diagonal rolls is the shift frame 4
It is on board 0. When arbitrarily adjusting the skew roll to the angle θ■, the worm wheel 4 attached to the stand 18 is operated by the skew angle setting motor 43 attached to the shift frame 40 via the worm 42! is rotated to set it to an arbitrary angle θH. At this time, the wedge-shaped clamp device 53 is loosened in order to rotate the stand 18 and the shift frame 4QflJf.
3 is for firmly connecting the stand 19 and the shift frame 40 during rolling.

Figures 4 and 8 show the finished product! A skew roll width setting device that arbitrarily adjusts the width of the skew rolls 15, 15A, 111, and 18A according to the size of the rolls 7 will be described.

As shown in FIG. 8, a built-in stand 18 that can adjust the roll gap and angle θV of the skew rolls is mounted on the shift frame 40 so that the angle θH can be adjusted. This shift frame 40 is movable in the diagonal roll axis direction on a sole plate 55 installed on the ground, and can be moved up and down.

It is loaded fixedly held on the left and right sides.

Further, a hydraulic cylinder type clamp device 53 attached to the shift frame 40 fixes the shift frame 40 to the sole plate 55. When adjusting the width of the skew roll, release this clamp device 53 and
The width setting motor and reducer 52 shown in FIG. 9 also rotate the webbing screw shaft 50.

This screw shaft 50 has a square-shaped nut 51 shown in FIG.
is attached, and this nut 51 is attached to the stand frame 40 so as not to rotate.

Therefore, by rotating the screw shaft 50.

The stand frame 40 is moved on the sole plate 55 in the roll axis direction.

FIGS. 4 and 6 show the driving of the skew rolls.

This will be explained with reference to FIG. The rolling power is transmitted from the main motor 80 to the power transmission shaft 83 via the reducer at.

From this axis to the binion (r!4 not shown), gear B
4 and gear 84 to universal spindle B5,
It is transmitted to the roll shaft 27 and the skewed roll 18.

In this device, the power transmission shaft 83 and the pinion.

It has a structure that allows it to slide in the direction of the roll axis. This method is not particularly illustrated since it is commonly used.

Note that the power transmission shaft 83 is installed on the ground or on the sole plate, and is fixed.

A distribution gear device incorporating a pinion and a gear 84 is attached to the shift frame 40, and moves along with the stand 18 on the sole plate 55 in the roll axis direction according to the skew roll width.

Furthermore, the power transmission system will be explained with reference to FIG. The axis direction changes relative to the stand 18 mounted on the shift frame 40, θV, and θH. This difference was resolved with the universal joint 85°85A,
Power is transmitted smoothly. Note that this universal joint is changed to a constant velocity ballge-heavy India depending on the absolute value of θ9° and θH.

(Effects of the Invention) With the apparatus of the present invention as described above, it becomes possible to economically and efficiently produce section steel having flanges of various sizes.

Note that in this apparatus, when the force required for rolling becomes very large, the skew rolls 15, 15A, 16.

Needless to say, backup rolls are provided above and below 1eA to ensure mill rigidity.

[Brief explanation of drawings]

FIG. 1 is a front view of the apparatus of the present invention, FIG. 2(a) is a front three-dimensional view of the oblique roll in the apparatus of the present invention, FIG. 3(b) is a side three-dimensional view, and FIG. Front view,
Fig. 4 shows an example of the front side of the present invention as a whole, and Fig. 6 shows a plan view of the device of the present invention, and Fig. 7 shows the present invention. FIG. 8 is a partial side view showing the device of the present invention, FIG. 9 is a partial plan view of the device of the present invention, and FIG. 10 is a partial front view of the device of the present invention. Fig. 11 shows an example of a conventional rolling equipment row and a roll hole shape corresponding to the rolling equipment, Fig. 12 shows the shape of each rolled material shaped by the conventional equipment, Fig. 13 shows an example of rolling H-beam steel. FIG. 14 is a conceptual front view showing the relationship between the rolls and the material to be rolled according to the universal rolling method, and FIG. 14 is a conceptual front view showing the relationship between the rolls and the material to be rolled in the conventional method. 15, 15A, 113, 18A... Oblique roll, 17... Rolling material, 19... Rolling mill stand,
20.20A--Down device, 40--Shift frame, 43-- Skew angle setting motor, 53-- Clamp device, 55-- Sole plate.

Claims (1)

[Claims] A rolling mill stand is mounted on a shift frame that is connected to a skew angle setting device and is horizontally rotatable, and a skew roll is disposed on the rolling mill stand via a bearing, and the bearing is connected to a rolling device. A type having a flange, which is characterized in that the axis of the roll can be moved obliquely with respect to the rolling direction and the vertical direction by rotating a shift frame connected in series and raising and lowering a rolling device, and the arrangement angle of the oblique roll can be freely changed. Material rolling equipment.