A three-roller rolling device and rolling method for F-shaped steel

Abstract

The present invention belongs to the technical field of steel rolling equipment and special-shaped steel rolling, and particularly relates to a three-roller rolling device for F-shaped steel; the device comprises: an upper horizontal roller (1), a lower horizontal roller (2) and a vertical roller (3); the upper horizontal roller (1) and the lower horizontal roller (2) are arranged opposite to each other in an upper and lower manner, and the vertical roller (3) is located on the same side of the two; the three rollers cooperate to form an F-shaped space (4); the device of the present invention adopts the vertical roller to process the outer side of the inclined leg of the F-shaped steel, replacing the existing technology of processing the outer side of the inclined leg of the F-shaped steel by the horizontal roller, optimizes the stress state during the processing of the outer side of the inclined leg, reduces the relative speed between the roller and the outer side of the inclined leg of the F-shaped steel, can significantly reduce surface defects such as roller rubbing marks and wire pressing, improves the yield rate, and reduces the rolling cost.

Description

Technical Field

[0001] The invention belongs to the technical field of steel rolling equipment and special-shaped steel rolling, and particularly relates to a three-roller rolling device and a rolling method for F-shaped steel. Background Art

[0002] F-shaped steel is a special steel for medium and low speed maglev train tracks. It is named because of its "F"-shaped cross section. From its shape, it can be seen that it is an asymmetric cross-section steel, and hot rolling production is difficult. Since maglev trains have high requirements for the magnetic conductivity of tracks, the magnetic conductivity of F-shaped steel formed by welding + machining methods in the past is not ideal, and the production efficiency is low. In order to solve this technical problem, F-shaped steel hot rolling forming technology came into being. Hot rolling forming technology is not only efficient, but also produces F-shaped steel with uniform internal structure and high magnetic conductivity. Once it appeared, it was widely used in medium and low speed maglev tracks with good results. At present, the common process for hot rolling forming F-shaped steel is rough rolling mill billet opening + continuous rolling unit finishing rolling. The continuous rolling unit is usually a universal unit or a two-roller unit. The rectangular billet is finally rolled into F-shaped steel through rolling of multiple rolling mills.

[0003] The Chinese invention patent "F-type steel roll double hole profile and rolling method" with application number 201310306294.6 discloses an F-type steel roll double hole profile and rolling method, the double hole profile is composed of the upper roll and the lower roll of the rolling mill. The hole profile involved in the patent is composed of the upper roll and the lower roll, which is a typical two-roll rolling method.

[0004] The Chinese invention patent "Method and rolling device for rolling asymmetric cross-section metal profiles" with application number 201010589100.4 discloses a method and rolling device for rolling asymmetric cross-section metal profiles. Although the patent has left and right vertical rollers pressed against the left and right surfaces of the upper horizontal roller and the lower horizontal roller respectively to prevent the upper horizontal roller and / or the lower horizontal roller from moving in the axial direction, since only the circumferential surfaces of the upper horizontal roller and the lower horizontal roller have holes and grooves for rolling metal materials into asymmetric profiles, its essence is still a two-roller rolling method.

[0005] The above two existing two-roll rolling methods are commonly used pass schemes for rolling special-shaped steel due to the small number of control parameters and simple operation. However, for large-sized special-shaped steel, the above two-roll rolling method has the following technical problems:

[0006] The deep groove of the upper roller leads to a large speed difference between the bottom of the groove and the groove mouth, causing surface quality defects such as scratches and wire intrusion on the side surface of the rolled piece, and a low yield rate. Although the surface defects such as scratches and wire intrusion can be reduced and the yield rate can be improved by reducing the rolling batch and increasing the frequency of roller repairs, it reduces production efficiency and increases production costs. Summary of the invention

[0007] The purpose of the present invention is to solve the above-mentioned defects existing in the existing rolling devices. The present invention proposes a three-roller rolling device for F-shaped steel, which adopts vertical rolls to process the outer side of the inclined leg of F-shaped steel, replacing the existing technology of horizontal rolls to process the outer side of the inclined leg of F-shaped steel, so as to produce F-shaped steel with excellent surface quality and reduce rolling costs.

[0008] In order to achieve the above-mentioned purpose, the present invention proposes a three-roll rolling device for F-shaped steel, which includes: an upper horizontal roll, a lower horizontal roll and a vertical roll; the upper horizontal roll and the lower horizontal roll are placed opposite to each other up and down, and the vertical roll is located on the same side of the two; the three work together to form an F-shaped space.

[0009] The bottom sides of the upper horizontal roller are respectively provided with a first main step-shaped structure and a second main step-shaped structure, and the two are integrally connected through two horizontal sections on the web and on the wing that are staggered and connected to each other.

[0010] The first main step-shaped structure includes a first vertical segment, a first horizontal segment, and a first oblique segment that are connected in sequence and form an angle of 5-20° with the vertical direction; the connections between the first vertical segment, the first horizontal segment, and the first oblique segment are all transition arcs.

[0011] The second main step-shaped structure includes a second vertical segment, a second horizontal segment, and a second oblique line segment which are connected in sequence and are at an angle of 5-20° to the vertical direction; the connections between the second vertical segment, the second horizontal segment, and the second oblique line segment are all transition arcs.

[0012] A first step-like structure and a second step-like structure are respectively provided on both sides of the top of the lower horizontal roller, and the two are integrally connected through the lower horizontal section of the web, the middle leg groove and the lower horizontal section of the wing plate that are connected to each other.

[0013] The first step-like structure includes a third oblique line segment, a third horizontal segment, and a fourth oblique line segment, which are connected in sequence and form an angle of 5-20° with the vertical direction; the connections between the third oblique line segment, the third horizontal segment, and the fourth oblique line segment are all transition arcs.

[0014] The second stepped structure includes a fifth oblique line segment, a sixth oblique line segment with an angle of 5-20° to the vertical direction, and a fourth horizontal segment which are connected in sequence; the connections between the fifth oblique line segment, the sixth oblique line segment, and the fourth horizontal segment are all transition arcs.

[0015] A third step-shaped structure and an outer leg oblique line segment are provided on one side of the vertical roller; the third step-shaped structure is located above the outer leg oblique line segment; the third step-shaped structure cooperates with the first main step-shaped structure, and the gap between the two is rectangular; the outer leg oblique line segment cooperates with the first secondary step-shaped structure, and the gap between the two is rectangular.

[0016] The first main step-shaped structure, the second main step-shaped structure, the first secondary step-shaped structure, the second secondary step-shaped structure, and the third secondary step-shaped structure are stepped composite plates of different sizes.

[0017] The third stepped structure includes a third vertical segment, a fifth horizontal segment, and a seventh oblique segment which are connected in sequence and form an angle of 5-20° with the vertical direction; the connections between the third vertical segment, the fifth horizontal segment, and the seventh oblique segment are all transition arcs.

[0018] Based on the three-roller rolling device for F-shaped steel, the present invention also provides a rolling method for the three-roller rolling device for F-shaped steel, wherein the size of each part of the F-shaped steel is controlled by moving three rollers, namely, an upper horizontal roller, a lower horizontal roller, and a vertical roller, and the method comprises:

[0019] The upper horizontal roller is placed directly above the lower horizontal roller, and the upper horizontal section of the web and the horizontal section of the wing of the upper horizontal roller are respectively opposite to the lower horizontal section of the web, the middle leg groove and the lower horizontal section of the wing of the lower horizontal roller;

[0020] The vertical roller is placed on one side of the upper horizontal roller and the lower horizontal roller, and the rectangular gap formed between the outer leg oblique line section of the vertical roller and the first step-shaped structure of the lower horizontal roller is pressed to form an F-shaped steel structure;

[0021] Keeping the upper horizontal roller fixed and moving the lower horizontal roller upward can reduce the thickness of the transverse section of the F-shaped steel; keeping the upper horizontal roller fixed and moving the lower horizontal roller downward can increase the thickness of the transverse section of the F-shaped steel;

[0022] Keep the lower horizontal roller fixed and move the vertical roller to the left to increase the thickness of the outer protruding section of the F-shaped steel; keep the lower horizontal roller fixed and move the vertical roller to the right to reduce the thickness of the outer protruding section of the F-shaped steel.

[0023] Keep the upper horizontal roller moving downward, compress the rectangular gap formed between the third step-shaped structure of the vertical roller and the first main step-shaped structure of the upper horizontal roller, and control the deviation of the vertical roller.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The device of the present invention adopts vertical rollers to process the outer side of the slanted leg of F-shaped steel, replacing the existing technology of horizontal rollers to process the outer side of the slanted leg of F-shaped steel, optimizes the stress state during the processing of the outer side of the slanted leg, reduces the relative speed between the roller and the outer side of the slanted leg of F-shaped steel, can significantly reduce surface defects such as roller rubbing marks and wire intrusion, improve the yield rate, and reduce the rolling cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a structural schematic diagram of a three-roller rolling device for F-shaped steel of the present invention.

[0027] Reference numerals:

[0028] 1. Upper horizontal roller 2. Lower horizontal roller

[0029] 3. Vertical roller 4. F-shaped space

[0030] 5. Horizontal section on the web 6. Horizontal section on the wing

[0031] 7. First vertical segment 8. First horizontal segment

[0032] 9. First oblique line segment 10. Second vertical segment

[0033] 11. Second horizontal segment 12. Second oblique segment

[0034] 13. Horizontal section below the web 14. Middle leg groove

[0035] 15. Horizontal section below the wing plate 16. The third oblique line section

[0036] 17. The third horizontal segment 18. The fourth oblique segment

[0037] 19. The fifth oblique line segment 20. The sixth oblique line segment

[0038] 21. Fourth horizontal segment 22. Outer leg oblique segment

[0039] 23. Third vertical segment 24. Fifth horizontal segment

[0040] 25. The seventh oblique line segment DETAILED DESCRIPTION

[0041] The present invention will now be further described with reference to the accompanying drawings.

[0042] like Figure 1 As shown, the present invention proposes a three-roller rolling device for F-shaped steel, which includes: an upper horizontal roll 1, a lower horizontal roll 2 and a vertical roll 3; the upper horizontal roll 1 and the lower horizontal roll 2 are placed opposite to each other or opposite to each other, and the vertical roll 3 is located on the left side of the two; the three together form an F-shaped space 4.

[0043] The first main step-like structure and the second main step-like structure are respectively provided on both sides of the bottom of the upper horizontal roller 1, and the two are integrally connected through two horizontal sections 5 on the web and horizontal sections 6 on the wing plate that are staggered and connected to each other, that is, the first horizontal section web 5 is located above the second horizontal section web 6, and the connection between the two is set as a transition arc.

[0044] The first main step-shaped structure includes a first vertical section 7, a first horizontal section 8, and a first oblique line section 9 which are connected in sequence and form an angle of 5-20° with the vertical direction; the connections between the first vertical section 7, the first horizontal section 8, and the first oblique line section 9 are all transition arcs.

[0045] The second main step-shaped structure includes a second vertical segment 10, a second horizontal segment 11, and a second oblique segment 12 which are connected in sequence and are at an angle of 5-20° to the vertical direction; the connections among the second vertical segment 10, the second horizontal segment 11, and the second oblique segment 12 are all transition arcs.

[0046] The first and second step-like structures are respectively provided on both sides of the top of the lower horizontal roller, and the two are integrally connected through the web lower horizontal section 13, the middle leg groove 14 and the wing lower horizontal section 15 connected to each other. Figure 1 As shown, the bottom of the upper horizontal roller 1 is placed opposite to the top of the lower horizontal roller 2.

[0047] The first stepped structure includes a third oblique line segment 16, a third horizontal segment 17, and a fourth oblique line segment 18, which are connected in sequence and form an angle of 5-20° with the vertical direction; the connection points among the third oblique line segment 16, the third horizontal segment 17, and the fourth oblique line segment 18 are all transition arcs.

[0048] The second stepped structure includes a fifth oblique line segment 19, a sixth oblique line segment 20 with an angle of 5-20° to the vertical direction, and a fourth horizontal segment 21 which are connected in sequence; the connections between the fifth oblique line segment 19, the sixth oblique line segment 20, and the fourth horizontal segment 21 are all transition arcs.

[0049] The bottom of the upper horizontal roller 1 is placed opposite to the top of the lower horizontal roller 2, and the third step-shaped structure and the outer leg oblique line segment of the vertical roller 3 face inward, and cooperate with the upper horizontal roller 1 and the lower horizontal roller 2 to form an F-shaped space 4.

[0050] The right side of the vertical roller 3 is provided with a third step-shaped structure and an outer leg oblique line segment 22; the third step-shaped structure is located above the outer leg oblique line segment 22; the third step-shaped structure cooperates with the first main step-shaped structure, and the gap between the two is rectangular; the outer leg oblique line segment 22 cooperates with the first secondary step-shaped structure, and the gap between the two is rectangular.

[0051] The first main step-shaped structure, the second main step-shaped structure, the first secondary step-shaped structure, the second secondary step-shaped structure, and the third secondary step-shaped structure are stepped composite plates of different sizes.

[0052] The third secondary step-shaped structure includes a third vertical section 23, a fifth horizontal section 24, and a seventh oblique line section 25 which are connected in sequence and form an integral whole; the connections between the third vertical section 23, the fifth horizontal section 24, and the seventh oblique line section 25 are all transition arcs. At this time, the F-shaped steel includes an external protruding section, an internal protruding section, and a transverse section, which are combined together to form an F shape. Among them, the first main step-shaped structure, the third secondary step-shaped structure, and the first secondary step-shaped structure cooperate, contact, and press each other to form an external protruding section; and the outermost end face of the external protruding section is an inclined surface, and the inclined surface is parallel to the outer leg oblique line section 22 of the vertical roller 3.

[0053] The upper horizontal roller 1 is located above the lower horizontal roller 2, and the upper horizontal roller 1 is kept fixed, the lower horizontal roller 2 moves upward, and the vertical roller 3 moves horizontally to the right, and the three cooperate to form an F-shaped space 4. The steel billet to be rolled is inserted into the F-shaped space for rolling to form an F-shaped steel. Among them, the middle leg groove 14 is a protruding section, and the size of the protruding section is fixed.

[0054] By moving the position of the lower horizontal roller 2, the size of the F-shaped space 4 is increased or decreased; specifically, moving the lower horizontal roller 2 downward increases the transverse section thickness of the F-shaped space 4; moving the lower horizontal roller 2 upward decreases the transverse section thickness of the F-shaped space 4.

[0055] By moving the vertical roller 3, the thickness of the external protruding section at the end of the F-shaped space 4 is increased or decreased; specifically, moving the vertical roller 3 to the left increases the thickness of the external protruding section at the end of the F-shaped space 4; moving the vertical roller 3 to the right decreases the thickness of the external protruding section at the end of the F-shaped space 4.

[0056] The lower horizontal roller 2 remains stationary, and the upper horizontal roller 1 moves downward, so that the first main step on the upper horizontal roller 1 contacts and presses the third secondary step on the vertical roller 3, thereby controlling the offset of the vertical roller 3 and ensuring that the size of the F-shaped space is fixed.

[0057] Based on the three-roller rolling device for F-shaped steel, the present invention also provides a rolling method for the three-roller rolling device for F-shaped steel, wherein the size of each part of the F-shaped steel is controlled by moving three rollers, namely, an upper horizontal roller 1, a lower horizontal roller 2, and a vertical roller 3. The method comprises:

[0058] The upper horizontal roller 1 is placed directly above the lower horizontal roller 2, and the upper horizontal section 5 on the web and the horizontal section 6 on the wing of the upper horizontal roller 1 are respectively opposite to the lower horizontal section 13 on the web, the middle leg groove 14 and the lower horizontal section 15 on the wing of the lower horizontal roller 2;

[0059] The vertical roller 3 is placed on one side of the upper horizontal roller 1 and the lower horizontal roller 2, and the rectangular gap formed between the outer leg oblique line segment 22 of the vertical roller 3 and the first step-shaped structure of the lower horizontal roller 2 is pressed to form an F-shaped steel structure; wherein the F-shaped steel structure includes: the upper horizontal roller 1 processes the horizontal segment 5 on the web and the horizontal segment 6 on the wing of the F-shaped steel; and the lower horizontal roller 2 processes the third horizontal segment 17, the fourth oblique line segment 18, the lower horizontal segment 13 of the web, the middle leg groove 14 and the lower horizontal segment 15 of the wing, and the fifth oblique line segment 19; and the outer leg oblique line segment 22 of the vertical roller 3;

[0060] Keeping the upper horizontal roller 1 fixed and the lower horizontal roller 2 moving upward can reduce the thickness of the transverse section of the F-shaped steel; keeping the upper horizontal roller 1 fixed and the lower horizontal roller 2 moving downward can increase the thickness of the transverse section of the F-shaped steel;

[0061] Keeping the lower horizontal roller 2 fixed and moving the vertical roller 3 to the left can increase the thickness of the outer protruding section of the F-shaped steel; keeping the lower horizontal roller 2 fixed and moving the vertical roller 3 to the right can reduce the thickness of the outer protruding section of the F-shaped steel;

[0062] The upper horizontal roller 1 is kept moving downward, and the rectangular gap formed between the third step-shaped structure of the vertical roller 3 and the first main step-shaped structure of the upper horizontal roller 1 is compressed to control the deviation of the vertical roller 3.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A three-roll rolling device for F-shaped steel, characterized in that: The device comprises: an upper horizontal roller (1), a lower horizontal roller (2) and a vertical roller (3); the upper horizontal roller (1) and the lower horizontal roller (2) are arranged opposite to each other in an up-and-down manner, and the vertical roller (3) is located on the same side of the two rollers; the three rollers cooperate to form an F-shaped space (4); A first step-like structure and a second step-like structure are respectively provided on both sides of the top of the lower horizontal roller, and the two are integrally connected via a web lower horizontal section (13), a middle leg groove (14) and a wing lower horizontal section (15) that are connected to each other; A first main step-shaped structure and a second main step-shaped structure are respectively provided on both sides of the bottom of the upper horizontal roller (1), and the two are integrally connected via two horizontal sections (5) on the web and horizontal sections (6) on the wing that are staggered and connected to each other; A third step-like structure and an outer leg oblique line segment (22) are provided on one side of the vertical roller; the third step-like structure is located above the outer leg oblique line segment (22); the third step-like structure cooperates with the first main step-like structure, and a gap between the two is rectangular; the outer leg oblique line segment (22) cooperates with the first secondary step-like structure, and a gap between the two is rectangular.

2. The three-roll rolling device for F-shaped steel according to claim 1, characterized in that: The first main step-shaped structure comprises a first vertical section (7), a first horizontal section (8), and a first oblique line section (9) which are connected in sequence and form an angle of 5-20 degrees with the vertical direction; the connection points between the first vertical section (7), the first horizontal section (8), and the first oblique line section (9) are all transition arcs.

3. The three-roll rolling device for F-shaped steel according to claim 1, characterized in that: The second main step-shaped structure comprises a second vertical segment (10), a second horizontal segment (11), and a second oblique segment (12) which are connected in sequence and form an angle of 5-20 degrees with the vertical direction; the connection points between the second vertical segment (10), the second horizontal segment (11), and the second oblique segment (12) are all transition arcs.

4. The three-roll rolling device for F-shaped steel according to claim 1, characterized in that: The first step-like structure comprises a third oblique line segment (16) which is at an angle of 5-20° to the vertical direction, a third horizontal segment (17), and a fourth oblique line segment (18) which is at an angle of 5-20° to the vertical direction, which are connected in sequence and in one piece; the connection points between the third oblique line segment (16), the third horizontal segment (17), and the fourth oblique line segment (18) are all transition arcs.

5. The three-roll rolling device for F-shaped steel according to claim 1, characterized in that: The second step-like structure comprises a fifth oblique line segment (19), a sixth oblique line segment (20) which is at an angle of 5-20° to the vertical direction, and a fourth horizontal segment (21) which are connected in sequence and in an integral manner; the connection points between the fifth oblique line segment (19), the sixth oblique line segment (20), and the fourth horizontal segment (21) are all transition arcs.

6. The three-roll rolling device for F-shaped steel according to claim 1, characterized in that: The third stepped structure comprises a third vertical segment (23), a fifth horizontal segment (24), and a seventh oblique segment (25) which are connected in sequence and form an angle of 5-20° with the vertical direction; the connection points between the third vertical segment (23), the fifth horizontal segment (24), and the seventh oblique segment (25) are all transition arcs.

7. A rolling method of a three-roll rolling device for F-shaped steel, the method being implemented by the three-roll rolling device for F-shaped steel as claimed in any one of claims 1 to 6, the method comprising: The upper horizontal roller (1) is placed directly above the lower horizontal roller (2), and the web upper horizontal section (5) and the wing upper horizontal section (6) of the upper horizontal roller (1) are opposite to the web lower horizontal section (13), the middle leg groove (14) and the wing lower horizontal section (15) of the lower horizontal roller (2); The vertical roller (3) is placed on one side of the upper horizontal roller (1) and the lower horizontal roller (2), and the rectangular gap formed between the outer leg oblique line segment (22) of the vertical roller (3) and the first step-shaped structure of the lower horizontal roller (2) is pressed to form an F-shaped steel structure; The upper horizontal roller (1) is kept stationary and the lower horizontal roller (2) is moved upward, so that the thickness of the transverse section of the F-shaped steel can be reduced; the upper horizontal roller (1) is kept stationary and the lower horizontal roller (2) is moved downward, so that the thickness of the transverse section of the F-shaped steel can be increased; Keeping the lower horizontal roller (2) stationary and moving the vertical roller (3) to the left can increase the thickness of the outer protruding section of the F-shaped steel; keeping the lower horizontal roller (2) stationary and moving the vertical roller (3) to the right can reduce the thickness of the outer protruding section of the F-shaped steel; The upper horizontal roller (1) is kept moving downward, and the rectangular gap formed between the third step-shaped structure of the vertical roller (3) and the first main step-shaped structure of the upper horizontal roller (1) is compressed, thereby controlling the deviation of the vertical roller (3).

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