JPH02290601A - Rolling device train for rail or resembling shape steel - Google Patents

Abstract

PURPOSE:To allow the common use of a rough rolling stage and the simplification thereof regardless of sizes by constituting the above-mentioned train of a roughing rolling mill, a double rolling section consisting of upper and lower horizontal rolls, and a universal rolling section built with a pair of vertical rolls in a part of the horizontal rolls. CONSTITUTION:The rough rolls 1 are constituted of the composite rolling mill which executes the double rolling by the upper and lower horizontal rolls and the universal rolling by the vertical rolls built into the right and left of a part of these rolls. Further, the box calibers I, II and molding calibers III constituted of the upper and lower horizontal rolls to roll a stock having a rectangular section to an approximate H shape are disposed in the initial rolling and the universal rolling calibers IV constituted of the upper and lower horizontal rolls and the right and left vertical rolls are disposed in the late period rolling to execute the rolling down of the flange thickness and web thickness of the approximate H shape obtd. in the initial rolling. The common use of the rough rolls 1 for various product sizes is possible by executing the rolling in pass schedules with the rolling device constituted in such a manner.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a row of rolling equipment for rolling rails or similar shaped steel in the field of rolling shaped steel.

[Prior Art] Conventionally, rail rolling has been carried out using double or triple rolling mill rows, or by applying a universal rolling mill to intermediate finishing rolling. More recently, a method of rolling using multiple universal rolling mills has also been used (r Iron a
nd Engineer J +985.5. P28
).

However, a problem common to these rolling methods is that the rough rolling process is not one-size-fits-all, so special rolls are required for each rail size, and roll replacement work is required during rolling.

The reasons why the dedicated role mentioned above is necessary include the following points. In other words, in the product cross section of each rail size, each part (head, body,
The difference in the cutting ratio of the legs) is due to the difference in the cutting ratio of the double rolling mill. l
:・It is not possible to adjust the lower roll gap, that is, to create different cross-sectional area ratios using the same roll.

■As shown in Figure 6 ({) (0), it is only possible to create different web heights.

[Problem to be solved by the invention] The present invention solves the problem of sharing rough rolls for each rail size (
The purpose is to significantly reduce the number of rough rolls in stock by making the rolls free-size, and also to omit the work of replacing rolls during rolling.

[A Thousand Steps to Solve the Problem] In order to achieve this object, the rolling equipment of the present invention includes a rolling equipment consisting of a rough rolling mill and a finishing mill, in which the rough rolling mill or the double horizontal rolls of upper and lower rolls are used. It is characterized by comprising a rolling section and a universal rolling section in which a pair of vertical rolls is incorporated into a part of the horizontal rolls.

Note that in the present invention, the rough rolling mill can be used as the first rough rolling mill, and a second rough rolling mill as described later can be arranged.

[Example] An example of rolling equipment according to the present invention is shown in FIG.

The rough roll 1 is a compound rolling mill that performs double rolling with the second and lower horizontal rolls and universal rolling by incorporating vertical rolls on the left and right sides of these rolls, and rolls a rectangular cut material into an approximately H shape. A box hole type and a shaping hole type consisting of upper and lower rolls are placed in the early rolling stage, and a universal rolling hole type consisting of upper and lower rolls and left and right vertical rolls is placed in the later rolling stage. Then, the flange thickness and web thickness of the approximately H-shaped material obtained in the initial rolling are reduced.

Rough roll 2 is a universal rolling mill, and the roll hole type is such that one vertical roll side is used as a base wheel bus (V), and the other vertical roll is in contact with the end of the horizontal roll body side, and this occurs when rolling with a base wheel bus. It catches the thrust force of the horizontal roll. The inside of the horizontal roll body of the rough roll 2 is made up of edging hole molds (VT) and sizing hole molds (■a, ■b, . . . ) for each product size.

The subsequent intermediate and finishing rolling rows are the same as before. By performing rolling in the rolling apparatus configured in this manner according to the pass schedule illustrated in the following, it has become possible to share the rough roll with each product size (free size).

Next, an example of a path schedule is shown.

The rough roll 1 rolls a rectangular material with a box hole die (work, ■), and further shapes it into a substantially H shape with a shaping hole die (III). Thereafter, each product size is divided using the same rough roll universal rolling hole die (rV).

The beam planks of intermediate rolling for each product size are those rolled with sizing hole types VI [a, 2b, . . . The basic dimensions of these beam blanks tH, tll,
Since jW, H, B, and ffiW are determined by the corresponding dimensions of each product size, they have different values between product sizes.

In the universal rolling hole type (rV) marked F, the target beam blank is rolled by adjusting the horizontal roll gap Bw''), the vertical roll gap on the head side (611''), and the vertical roll gap on the leg side (CO''). Web thickness (t.W″) suitable for
, head thickness (tH'). Obtain the leg thickness (tB').

Figure 2 shows the shape of the universal rolling hole (rV) material. This material shape and the product size shown in FIG. 5 have approximately the following relationship. For example, (a) when rolling product size a shown in the figure,
l) AH', AI": Cross section of each part shown in Figure 2
a, ABa 2 Since the asymmetrical similar H-shaped universal rolling using rolls with coarse cross-sectional areas at each part shown in FIG. 5 facilitates metal flow, the above formula (1) can be fully satisfied.

Next, rolling is performed using the base wheel groove (V) of the rough roll 2. Leg thickness (to') required for adjusting the vertical roll gap (c++') and web thickness (tw') and head width (I+') required for adjusting the horizontal roll gap (1';W') (see Figure 6). At this time, the vertical roll (a) facing the vertical roll (mouth) makes a metal touch on the body ends of the upper and lower horizontal rolls to prevent the upper and lower horizontal rolls from moving laterally in the direction of the arrow @.

Next, the rolled material is turned 90° to form an edging hole (Vr).
The required web inner width Bw') is obtained by adjusting the horizontal roll gap (cw') (see Fig. 1).

Next, roll with the sizing hole mold (■a), head width (11),
Leg width (B), torso thickness (tW), head thickness (Lll), torso J
! y. (tB), body width (JZ W) is shaped and rolled (
(See Figure 1).

In this way, a beam blank before intermediate rolling of size A can be obtained. In this series of buses, the only hole type dedicated to size a is the sizing hole type (■a), and after that, the hole type for each The size is shared. As mentioned above, these common groove types correspond to each rolling size by adjusting the roll gap. Intermediate rolling and finish rolling are performed using conventional rolling methods using dedicated roll holes.

Since the present invention is concerned with the configuration of roll grooves in the rough IE rolling process, rolling is carried out in the following roll groove order.

■Achieve a similar H shape with the universal roll hole type.

■ Obtain a rail or similar shape using the pace poile hole mold.

■Edging hole type column high pressure F of rail or similar shape.

■Roll beam blanks for each product size using a sizing hole die.

The roll hole type configuration of this example can also be applied to a continuous rolling line for H-section steel or similar types, as shown in FIG. The hole-type code work shown in Figure 1, H, -... ■a is the work shown in Figure 3, II
, ... ■ Each has the same effect as a. In FIG. 3, which is a continuous line, when changing the size of the product being rolled, rolls are replaced in mills Nos. 5 to 11. Mill No. of rough rolling section
In cases 1 to 4, only the roll gap adjustment is required. In the universal roll type (TV), the rolled material is thinner than the flanges on the leg side or on the head side, so the vertical rolls on the leg side are generally rolled down compared to the head side! i is large. For this reason, the upper and lower horizontal rolls generate thrust force in the headward direction. In order to prevent the horizontal roll from moving laterally due to this thrust force, as shown in FIG. 4, a protrusion is provided on the head side of the horizontal roll, and the head-side vertical roll is brought into metal contact with the protrusion to receive the thrust force.

In this case, the head thickness (Ll+') is a constant value. In a design where the head thickness (11") is a constant value, the leg J'N (tB
(1) is satisfied by adjusting the equation (1).Special consideration is taken when the thrust force is large in the asymmetric universal hole type.

As described above, the present invention has the highest rolling efficiency if the finish rolling is universal rolling, but groove rolling equipment may be used as in some rolling equipment. In other words, the advantage of the present invention that the rough rolling process can be used in any size can be enjoyed.

[Effects of the Invention] As described above, according to the present invention, the rough rolling process, which is the least efficient in rolling shaped steel, can be shared and simplified regardless of the size, so the industrial effects are extremely large.

[Brief explanation of the drawing]

Fig. 1 shows an example of the rolling equipment of the present invention, and Fig. 2 shows an example of the rolling equipment of the present invention.
A cross section of the material on the exit side of the first rough rolling mill in the figure is shown. FIG. 3 shows an example of application of the present invention to a continuous rolling line, and FIG. 4 shows a thrust force absorption mechanism in a second rough rolling mill. Fifth
The figure and FIG. 6 are explanatory diagrams for making products of different sizes. 1, 2... Rough roll, 3-5... Intermediate rolling, 6, 7
...finish rolling, machining, II...box hole type, ■...
・Forming hole type, ■...Universal rolling hole type, ■...
Base wheel hole type, ■...Edging hole type, ■a,
■b...Sizing hole type

Claims (1)

[Claims] 1. In a rolling equipment consisting of a rough rolling mill and a finishing rolling mill, the rough rolling mill has a double rolling section with upper and lower horizontal rolls, and a universal rolling section with a pair of vertical rolls incorporated into a part of the horizontal rolls. A row of rolling equipment for rolling rails or similar shaped steel, characterized by the following: