KR101643274B1 - Manufacturing device and manufacturing method for unequal leg and unequal thickness angle steel - Google Patents

Abstract

In the rolling machine exit guide 20, the movement of the profiled steel 10 in the ± Y direction after the uneven part is regulated by the side guides 21, 22 and the side rollers 23, 24. Further, the movement in the downward direction (-Z direction) of the profiled steel 10 after the uneven part caused by restricting the movement in the ± Y direction is restricted by a table roller or the like. The movement in the upward direction (+ Z direction) of the profiled steel 10 after the uneven portion generated by regulating the movement in the ± Y direction is regulated by the pressing roller 27. [ Accordingly, it is possible to suppress the occurrence of bending and distortion in the mountain-shaped steel 10 after the uneven part is formed immediately after the rolling, and the mountain-shaped steel 10 can be steadily guided to the next casted shape to be sagged.

Description

TECHNICAL FIELD [0001] The present invention relates to a manufacturing apparatus and a manufacturing method for a steel plate,

TECHNICAL FIELD The present invention relates to a manufacturing apparatus and a manufacturing method for an unequal thickness mountain-like steel.

Antenna steel beams with unequal lengths are asymmetrical shapes with different lengths and plate thicknesses on the long leg side and the short leg side and are used as stiffeners inside the ship There are many. Since the profiled steel after the uneven part has an asymmetric shape, it is difficult to stably manufacture it. In general, acid steels after the uneven part are manufactured using the caliber rolling method (see Patent Document 1). In other words, the shape of the profiled steel after the sidewall is (1) subjected to round-pass rolling in a plurality of passes on a steel material having a rectangular cross-section by using a rough rolling mill having a roughness in the rough rolling process, (2) a plurality of passes round-rolling is performed on the roughly-shaped steel strip using an intermediate rolling mill having a cone shape in the intermediate rolling step, (3) a round rolling process is carried out in the finish rolling step, And then finishing rolling the slab using a rolling mill.

Japanese Patent Application Laid-Open No. 60-102201

There are the following problems in the case of producing acid-section steel after the uneven section by using the coining-rolling method. That is, the cross-sectional shape of the coin to be used in the layout of the rolling line shown in Fig. 1 is asymmetrical in both the up-and-down and left-and-right directions as shown in Fig. Therefore, if rolling is carried out without any induction guide, vertical and lateral bending of the product occurs on the inlet side and the outlet side of the rolling mill during rolling, which causes a defective shape, It is difficult to induce the product into the shape of the next process and to engage with it.

In addition, there are other problems as described below in the method for producing the post-like steel after the uniaxial rolling using the co-rolling method. Hereinafter, with reference to Fig. 9, the problem of the method of manufacturing the post-like steel after the uniaxial rolling using the coarse rolling method will be described. Fig. 9 is a plan view of a billet for explaining the problem of a method of producing a post-like steel after a sidewall using a co-rolling method. Since the profiled steel after the uneven part has an asymmetric shape, the steel piece 100a as shown in Fig. 9 is bent in the right and left direction (+ -Y direction) immediately after rolling in the intermediate and finish rolling process . The symbol L in Fig. 9 indicates the center position of the rolling roll.

In the case where bending in the lateral direction is generated in the slab, it is difficult to steadily guide the slab to the next slab and stick it to the next. From this background, in the conventional method of manufacturing the posterior-type steel after the uneven sidewall, as shown in Fig. 9, side guides 101a and 101b are provided on both right and left sides of the steel strip to restrict the movement of the steel strip in the left- As in the case of the steel strip 100b shown in Fig. 5A, the occurrence of bending in the lateral direction is suppressed immediately after the rolling.

In the case where the left and right direction movement of the steel strip is restricted by providing the side guides 101a and 101b, the movement in the downward direction (the Z direction) is restricted by the conveying rollers, ) Acts on the steel strip, and distortion occurs in the steel strip. In the case where warpage is generated in the steel strip, it is difficult to steadily guide the steel strip to the next steel strip and to squeeze the steel strip in the same manner as in the case where the warpage occurs in the lateral direction. For this reason, it has been expected to provide a manufacturing apparatus and a manufacturing method of a trapezoidal steel such as a uniaxial shoe capable of suppressing occurrence of bending and warping in the steel strip.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a manufacturing apparatus and a manufacturing method of a trapezoidal steel such as a uniaxial shoe capable of suppressing occurrence of bending and twisting in the steel strip.

The apparatus for producing a trapezoidal steel according to the present invention is an apparatus for manufacturing a trapezoidal steel having an aspheric shape and a steel plate passed through the rolling mill to produce an unshaped unsharp steel plate, A first member formed on an output side of the rolling mill and configured to regulate the upward movement of the steel strip by contacting the upper surface of the steel strip rolled by the rolling mill, And a second member that is provided on the first surface of the substrate.

The apparatus for producing a trapezoidal steel according to the present invention is characterized in that, in the above-mentioned invention, the second member is disposed at a position where it contacts the mountain-shaped apex of the post-like steel.

According to the present invention, in the above-described invention, the second member is disposed at a position where it makes contact with the long side portion of the post-like steel such as the uneven surface.

According to the present invention, there is provided an apparatus for producing a trapezoidal-like posterior-half steel according to the above-described invention, wherein the second member is movable in the vertical direction.

The apparatus for manufacturing a trapezoidal-like posterior steel according to the present invention is characterized in that in the above-described invention, a third member And a control unit.

The apparatus for manufacturing a trapezoidal-like posterior like steel according to the present invention is characterized in that in the above-described invention, the apparatus is provided with a plurality of balls, the first member and the second member are formed on the outlets of respective balls, Is different in a plurality of spherical spaces.

A method of manufacturing a trapezoidal steel according to the present invention is a method of manufacturing a trapezoidal steel having an asphaltic side and a trapezoidal side by passing a billet through a rolling mill having a cone, A step of restricting the horizontal movement of the billet rolled by the rolling mill and a step of regulating the upward movement of the billet rolled by the rolling mill by the second member formed on the outgoing side of the rolling mill .

According to the apparatus and method for manufacturing the post-like steel of the present invention, it is possible to suppress the occurrence of bending and twisting in the steel strip.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a constitution of a rolling line of a trapezoidal steel to which the present invention is applied. Fig.
Fig. 2 is a view showing a constitution of a rolling line of a trapezoidal steel to which the present invention is applied.
Fig. 3 is a cross-sectional view showing the configuration of a trapezoidal steel plate according to an embodiment of the present invention.
Fig. 4 is a schematic view showing the constructions of constructions used in the production of the post-like steel, such as the uneven sidewall.
Fig. 5 is a front view showing the structure of a rolled steel sheet outgoing guide according to one embodiment of the present invention. Fig.
Fig. 6 is a view of the rolling machine exit guide, which is one embodiment of the present invention, viewed from the side of the rolling mill. Fig.
Fig. 7 is a view showing the configuration of a modified example of the rolling mill outgoing guide shown in Fig. 6. Fig.
Fig. 8 is a view showing the configuration of another modified example of the rolling-out guide of Fig. 6; Fig.
Fig. 9 is a plan view of a billet for explaining the problem of a method of producing a post-like steel after a sidewall using a co-rolling method.

(Mode for carrying out the invention)

Hereinafter, with reference to the drawings, a manufacturing apparatus and a manufacturing method of a trapezoidal steel such as a trapezoidal sill according to an embodiment of the present invention will be described.

[Configuration of Rolling Line]

First, with reference to Fig. 1, the configuration of a rolling line of a trapezoidal steel to which the present invention is applied will be described.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a constitution of a rolling line of a trapezoidal steel to which the present invention is applied. Fig. As shown in Fig. 1, the rolling line of a trapezoidal steel such as a uniformalized section to which the present invention is applied is a reverse rolling line for manufacturing a trapezoidal section steel having a trapezoidal cross section by performing multiple pass round rolling on a piece of steel. That is, the rolling line 1 shown in Fig. 1 includes a heating furnace 2 for uniformly heating a piece of steel having a rectangular cross section and a breakdown mill 2 for rolling the steel piece into a rough- (BD mill) 3, a conveying mechanism 4 for conveying the roughly-shaped steel strip to the intermediate rolling mill 5, and a conveying mechanism 4 for reciprocating a plurality of passes so that the roughly- (SF mill) 7 for rolling the billet in the form of a product by finish rolling by a ball having a product shape, and an intermediate mill 5, 6 (R1 mill, S1 mill) Respectively.

However, the rolling line of the non-inverted trapezoidal steel to which the present invention is applied is not limited to the rolling line of the reverse type shown in Fig. 1, but can also be applied to the tandem rolling line as shown in Fig. That is, the rolling line 1 shown in Fig. 2 is provided with a plurality of finishing mills 8a to 8j (F-mill group) having a different shape, and a plurality of finishing mills 8a to 8j in this order so that the billet is rolled into a product shape.

[Construction of Mountain Type Steel after Unequal Sections]

Next, with reference to Fig. 3, the configuration of a trapezoidal steel plate according to an embodiment of the present invention will be described.

Fig. 3 is a cross-sectional view showing the configuration of a trapezoidal steel plate according to an embodiment of the present invention. As shown in Fig. 3, the unshaped unshrouded profiled steel 10 has a long side portion (web) 10a and a short side portion (flange) 10b . The length A of the long side portion 10a is longer than the length B of the short side portion 10b and the thickness t1 of the long side portion 10a is thinner than the thickness t2 of the short side portion 10b. As shown in Fig. 3, the mountain-shaped section 10 is rolled in an asymmetric mountain-like shape as shown in Fig. 3, but may be rolled in an L-shape.

[Composition of ball type]

Next, with reference to Fig. 4, the configuration of the core used in the manufacture of the post-trapezoidal steel is described.

Fig. 4 is a schematic view showing the constructions of constructions used in the production of the post-like steel, such as the uneven sidewall. As shown in Figs. 4 (a) to 4 (h), a plurality of shapes having different shapes are used at the time of manufacturing the post-like steel after the uneven sidewall, and these shapes are obtained by the intermediate rolling mills 5, Are formed in the rolling mill 7 or the finish rolling mills 8a to 8j shown in Fig. The profiled steel is manufactured by sequentially rolling the steel strip into a product shape by inserting the steel strips into a plurality of spheres in sequence by means of a reverse mill or a tandem mill.

[Configuration of Rolling Exit Guide]

In the apparatus and method for manufacturing a post-trapezoidal steel according to an embodiment of the present invention, in order to suppress the occurrence of bending and twisting in the steel strip, the rolling-out guide is constructed as follows. 5 to 8, a description will be given of the structure of the rolling mill outgoing guide, which is one embodiment of the present invention.

Fig. 5 is a front view showing the structure of a rolled steel sheet outgoing guide according to one embodiment of the present invention. Fig. Fig. 6 is a view of the rolling machine exit guide, which is one embodiment of the present invention, viewed from the side of the rolling mill. Fig. Fig. 7 is a view showing the configuration of a modified example of the rolling mill outgoing guide shown in Fig. 6. Fig. Fig. 8 is a view showing the configuration of another modified example of the rolling-out guide of Fig. 6; Fig. Hereinafter, the direction of rolling (insertion) of the steel strip in the X direction, the direction orthogonal to the X direction in the horizontal plane is denoted as Y direction, and the vertical direction orthogonal to the X direction and Y direction is denoted as Z direction.

The rolling mill outgoing guide according to one embodiment of the present invention is formed on the exit side of the intermediate rolling mills 5 and 6 and the finishing mill 7 or the finishing mills 8a to 8j shown in Fig. . 5 and 6, the rolling mill outgoing guide 20 includes side guides 21 and 22, side rollers 23 and 24, an upper side stripper 25, a lower side stripper 26, And a pressing roller 27 is provided. 5, the side guides 22 and the side rollers 24 are not shown. Reference numeral 31 in Fig. 5 denotes a table roller in the reverse type rolling line and an intermediate trough in the tandem type rolling line. The side guides 21 and 22 and the side rollers 23 and 24 function as a first member according to the present invention. The pressing roller 27 functions as a second member according to the present invention.

The side guides 21 and 22 are formed on the right and left sides of the mountain-shaped steel 10 after the uneven surface. The side rollers 23 and 24 are formed on the side guides 21 and 22, respectively. The side rollers 23 and 24 are configured so as to be movable in the ± Y direction by using an actuator so that the circumferential surface of the side rollers 23 and 24 can protrude from the end face of the side guides 21 and 22 to the side of the mountain- . The side rollers 23 and 24 may be controlled to move on-line or off-line, or may be moved during rolling. The side guides 21 and 22 and the side rollers 23 and 24 regulate the movement of the angled section 10 in the ± Y direction after the uneven section so that the angled section 10 and the unillustrated section 10 are moved in the ± Y direction Thereby preventing occurrence of bending.

The upper stripper 25 and the lower stripper 26 are disposed close to the upper roll 30a and the lower roll 30b, respectively. The upper stripper 25 and the lower stripper 26 are respectively disposed between the upper roll 30a and the lower roll 30b and the steel strip with a front end portion 30a projecting toward the circumferential surfaces of the upper roll 30a and the lower roll 30b, So that the steel strips are prevented from being wound on the upper roll 30a and the lower roll 30b. Concave portions 25a and convex portions 26a are formed on the upper surface of the upper side stripper 25 and the upper side of the lower side stripper 26, The profiled steel 10 after the uneven section rolled by the intermediate rolling mill and the finishing rolling mill has a space formed by the circumferential surface of the side rollers 23 and 24 and the lower surface of the upper stripper 25 and the upper surface of the lower stripper 26 S through.

The pressing roller 27 has a slot shape. The pressing roller 27 is disposed at a position on the downstream side of the upper side stripper 25 in the rolling direction and at a position where the circumferential surface thereof comes into contact with the apex 10c of the mountain- The pressing roller 27 is configured to be movable in the ± Z direction using an actuator so that the peripheral surface can always contact the apex 10c of the mountain-shaped steel 10 after the uneven surface is always uneven. The pressing roller 27 may be controlled to move on-line or off-line, or may be moved during rolling.

In the rolling machine exit guide 20 having such a configuration, the movement of the profiled steel 10 in the ± Y direction after the uneven part is regulated by the side guides 21 and 22 and the side rollers 23 and 24. In addition, the motion of the angled portion 10 in the -Z direction after regulating the movement in the ± Y direction is restricted by the table roller (or the intermediate trough) 31 and the like. Movement in the + Z direction of the profiled steel 10 after the uneven portion generated by regulating the movement in the ± Y direction is restricted by the pressing roller 27. [

Therefore, according to the rolling guide 20 of the embodiment of the present invention, it is possible to suppress the occurrence of bending and distortion in the profiled steel 10 after the uneven part is formed immediately after the rolling, The next ball can be stably guided to the ball. In addition, when the rolling guide 20 is installed on the exit side of the final rolling mill, it is possible to reduce product defects due to bending and twisting, thereby reducing the pressing process and improving the yield. Since the positions of the circumferential surfaces of the side rollers 23 and 24 and the pressing roller 27 are movable, a roll shape in which the rolling-out guide 20 is disposed and a rolling device having a size of bending or twisting In accordance with the change, it is possible to stably induce the acid section steel (10) to the next cast and to suture the uneven section.

In the present embodiment, the rollers are not provided on the side of the lower side stripper 26, but as shown in Fig. 7, the lower side of the lower side stripper 26 on the downstream side in the rolling direction, The roller 28 may be disposed at a position where the roller 28 contacts the roller 10d. The lower surface 10d of the mountain-shaped steel 10 after the asymmetric edge portion is placed on the table roller (or the middle trough) by disposing the roller 28 at a position where the circumferential surface is in contact with the lower surface 10d of the mountain- It is possible to suppress occurrence of defective shape such as burn-in or abrasion due to strong contact with the substrate 31 or the like.

In this embodiment, the pressing roller 27 is disposed at a position where the peripheral surface contacts the vertex 10c of the mountain-shaped portion of the mountain-shaped steel 10 after the uneven surface. However, the present invention is not limited to this embodiment And may be disposed at a position other than the mountain-shaped apex 10c of the mountain-shaped steel 10 after the uneven surface if the occurrence of bending or distortion occurs. Specifically, as shown in Fig. 8, the pressing roller 29 may be disposed at a position where the circumferential surface thereof contacts the long side portion 10a of the mountain-shaped steel 10 after the uneven portion. In this case, the shape of the pressing roller 29 is formed into a tubular shape in conformity with the shape of the ball. The pushing roller 29 is configured to be movable in the ± Z direction using an actuator so that the peripheral surface thereof can always contact the long side portion 10a of the angled portion 10 after the uneven surface is always flat. By arranging the rollers opposed to each other only at the occurrence of bending or twisting, the design of the rolling-out guide 20 can be facilitated and the maintenance work of the maintenance parts such as bearings formed on the rollers can be reduced.

Although the embodiments to which the invention made by the present inventors have been described above have been described, the present invention is not limited by the techniques and drawings constituting a part of the present invention according to the present embodiment. That is, other embodiments, examples, operating techniques, and the like, which are made by ordinary artisans based on the present embodiment, are all included in the scope of the present invention.

1: Rolling line
2: heating furnace
3: Breakdown mill
4:
5, 6: Medium rolling mill
7, 8a to 8j: Finishing mill
10: Shape of steel after inequality
10a: long side
10b: short side
10c: Vertex
10d: when
20: Rolling mill outlet guide
21, 22: side guide
23, 24: Side roller
25: Upper side stripper
26: Lower side stripper
27, 29: pressing rollers
28: Rollers
30a: Upper roll
30b: Lower roll
31: Table roller (or intermediate trough)

Claims (11)

An apparatus for manufacturing a trapezoidal-like steel having a rolling machine having a hole (hole) type and producing a steel sheet after passing the steel strip through the rolling mill,
The manufacturing apparatus comprises a rolling mill outgoing guide formed on the exit side of the rolling mill,
A first member for restricting lateral movement of the billet rolled by the rolling mill,
And a second member for restricting upward movement of the steel strip by contacting the upper surface of the steel strip rolled by the rolling mill,
The rolling direction of the steel strip is defined as the X direction, the Y direction in the direction perpendicular to the X direction in the horizontal plane, the Z direction perpendicular to the X direction and the Y direction,
Wherein the first member includes an actuator that makes the first member movable in the ± Y direction,
Wherein the second member includes an actuator that makes the second member movable in the ± Z direction,
Wherein the first member includes a pair of side guides and side rollers respectively formed on the side guides, and the second member includes a pressing roller,
Wherein the steel strip rolled by the rolling mill passes through a space of the rolling mill outgoing guide formed by the circumferential surface of the side rollers, the lower surface of the upper stripper and the upper surface of the lower stripper. . The method according to claim 1,
Wherein the second member is disposed at a position in contact with a mountain-shaped apex of the mountain-like steel after the uneven part. The method according to claim 1,
Wherein the second member is disposed at a position in contact with a long side portion of the mountain-shaped steel such as a uneven surface. delete 4. The method according to any one of claims 1 to 3,
And a third member formed on an outgoing side of the rolling mill and restricting the downward movement of the steel strip by contacting the lower surface of the steel strip rolled by the rolling mill. delete 4. The method according to any one of claims 1 to 3,
Wherein the first member and the second member are formed on the outward side of each of the balls and the arrangement position of the second member is different in the plurality of balls. . delete 6. The method of claim 5,
Wherein the first member and the second member are formed on the outward side of each of the balls and the arrangement position of the second member is different in the plurality of balls. . delete The present invention relates to a method of manufacturing a steel plate having an unequal isosceles trapezoidal shape using a rolling machine outward guide in manufacturing an angled steel plate by passing a steel strip through a rolling mill having a spherical shape,
A step of regulating the movement of the steel strip rolled by the rolling mill in the transverse direction by the first member formed on the exit guide of the rolling mill,
And a step of regulating the upward movement of the billet rolled by the rolling mill by the second member formed on the exit guide of the rolling mill,
The rolling direction of the steel strip is defined as the X direction, the Y direction in the direction perpendicular to the X direction in the horizontal plane, the Z direction perpendicular to the X direction and the Y direction,
Wherein the first member includes an actuator that makes the first member movable in the ± Y direction,
Wherein the second member includes an actuator that makes the second member movable in the ± Z direction,
Wherein the first member includes a pair of side guides and side rollers respectively formed on the side guides, and the second member includes a pressing roller.

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