A method for measuring the taper of a copper plate on the narrow side of a side-concave slab continuous casting mold

Abstract

The present application relates to the technical field of the taper measurement of the narrow side copper plate of the side concave slab continuous casting crystallizer, and relates to a kind of measurement method of the taper of the narrow side copper plate of the side concave slab continuous casting crystallizer, which is based on the camber amount of the narrow side copper plate of the side concave slab continuous casting crystallizer to be measured and the interval of the two horizontal fulcrums of the mechanical taper gauge used for measurement to prepare a structure compensation bracket;During use, the structure compensation bracket is placed on the upper horizontal plane of the narrow side copper plate of the side concave slab continuous casting crystallizer to be measured, the side surface of the structure compensation bracket is aligned with the side surface of the narrow side copper plate of the side concave slab continuous casting crystallizer to be measured, and the vertical surface supporting foot of the structure compensation bracket is attached to the measured surface of the narrow side copper plate of the side concave slab continuous casting crystallizer to be measured.The present application compensates the camber of the convex range by designing a structure compensation bracket, and then combines the method of the present application, so that the taper of the side concave slab continuous casting crystallizer can be measured using a conventional mechanical taper gauge.

Description

Technical Field

[0001] This invention relates to the field of measuring the taper of the narrow-side copper plate in a side-concave slab continuous casting crystallizer. Background Technology

[0002] A concave slab is a special type of slab with concave sides in its cross-section. It is a customized continuous casting billet shape adapted to specific hot rolling processes and to improve steel yield. After entering the hot rolling process, the concave slab significantly reduces edge damage, solving the problems of low yield and high cost associated with traditional rectangular slab hot-rolled coils. It is particularly suitable for high-end plate production scenarios with high yield requirements. The concave slab continuous casting crystallizer is a core component of the continuous casting machine. It is a forced water-cooled bottomless ingot mold specifically designed for the continuous casting production of concave slabs. It receives molten steel and cools and solidifies it to form a robust billet shell conforming to the concave cross-sectional characteristics, directly determining the quality of the cast billet and the subsequent hot rolling yield. Chinese patents CN201520673254.X (titled "A Slab Continuous Casting Crystallizer") and CN201610796688.8 (titled "Continuous Casting Production System and Method for Side-Concave Slabs") both mention a side-concave slab continuous casting crystallizer. One of the important components of this crystallizer is a curved narrow-sided copper plate with a central convex shape. Its purpose is to form a slab shell with a corresponding side concavity by contacting the molten steel, and then form a side-concave slab through secondary cooling in the continuous casting machine.

[0003] The inner cavity of the concave slab continuous casting mold needs to be adjusted to a state that is wider at the top and narrower at the bottom. This is mainly achieved by adjusting the taper of the narrow-side copper plate. Before the continuous casting of slabs begins, the taper of the narrow-side copper plate in the mold needs to be measured. Taper is an indicator that characterizes the degree of inclination of the copper plate in the vertical direction. The narrow-side copper plate of a conventional slab continuous casting mold has a planar structure, and the tool for measuring its taper is called a mechanical taper meter. During use, the two horizontal support points of the mechanical taper meter need to be placed on the upper part of the copper plate, and the two vertical support points and the third vertical support point, a total of three support points, need to be close to the vertical surface of the copper plate. After adjusting to the horizontal plane using the bubble level and the leveling knob, the taper bubble level and the taper adjustment knob need to be adjusted to the horizontal plane again. The reading on the taper meter is the taper value measured by the mechanical taper meter.

[0004] The narrow-side copper plate of the concave slab continuous casting crystallizer has a curved surface structure with a raised center. However, the mechanical taper instrument requires three support points—two vertical plane support points and a third vertical plane support point—to be close to each other on a single plane. The raised curved surface structure means that the mechanical taper instrument cannot directly measure the taper value of the concave slab continuous casting crystallizer. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: how to provide a method for measuring the taper of the narrow side copper plate of a side-concave slab continuous casting crystallizer, which can realize the taper measurement of the narrow side copper plate of the side-concave slab continuous casting crystallizer with a centrally convex curved surface structure using a mechanical taper meter.

[0006] The technical solution adopted in this invention is: a method for measuring the taper of the narrow-side copper plate in a concave slab continuous casting crystallizer, which is carried out according to the following steps. Step 1: Based on the convexity of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested and the distance between the two horizontal support points (1) of the mechanical taper instrument used for measurement, prepare a structural compensation bracket (9) that satisfies the following conditions: the total width of the structural compensation bracket (9) is the same as the width of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested; the thickness of the vertical support foot (11) of the structural compensation bracket (9) is equal to the convexity of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested; and the distance between the two taper instrument horizontal support point holes (12) of the structural compensation bracket (9) is equal to the distance between the two horizontal support points (1) of the mechanical taper instrument used for measurement. Step 2: During use, place the structural compensation bracket (9) on the horizontal plane above the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested. Align the side of the structural compensation bracket (9) with the side of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested. The vertical support foot (11) of the structural compensation bracket (9) is close to the test surface of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested. Step 3: Rotate the taper adjustment knob (6) of the mechanical taper meter used for measurement counterclockwise to zero; Step 4: Place the two horizontal support points (1) of the mechanical taper instrument used for measurement into the two horizontal support point holes (12) of the structural compensation bracket (9), adjust the horizontal adjustment knob (8) of the mechanical taper instrument used for measurement so that the bubble of the horizontal bubble level (7) is in the middle, and ensure that the two vertical support points (2) of the mechanical taper instrument used for measurement are close to the middle of the test surface of the narrow side copper plate (10) of the concave slab continuous casting crystallizer on the side to be measured; Step 5: Adjust the taper adjustment knob (6) of the mechanical taper instrument used for measurement. When the bubble of the taper bubble level (5) of the mechanical taper instrument used for measurement is in the middle, read the reading of the taper table (4) of the mechanical taper instrument used for measurement, which is the taper value of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be measured.

[0007] The mechanical taper measuring instrument includes an L-shaped support rod, a measuring rod, two horizontal fulcrums (1), two vertical fulcrums (2), a third vertical fulcrum (3), a taper gauge (4), a taper bubble level (5), a taper adjustment knob (6), a horizontal bubble level (7), and a level adjustment knob (8). The taper gauge (4) and the taper bubble level (5) are mounted on the upper crossbar of the L-shaped support rod. The lower part of the measuring rod has a third vertical fulcrum (3), and the middle part of the measuring rod has a vertical guide rod. Two vertical plane support points (2) are installed at both ends of the vertical plane guide rod. A horizontal guide rod is installed at the upper part of the measuring rod. Two horizontal support points (1) are installed at both ends of the horizontal guide rod. A horizontal plane bubble level (7) is installed at the center of the upper part of the horizontal guide rod. A horizontal adjustment knob (8) for adjusting the horizontal plane bubble level (7) is installed on the horizontal guide rod. The lower part of the L-shaped support rod is hinged to the measuring rod. The upper part of the L-shaped support rod is connected to the measuring rod through an adjustable tilt device. A taper adjustment knob (6) is installed on the adjustable tilt device.

[0008] The structural compensation bracket (9) includes a structural compensation bracket body, with two vertical support feet (11) of symmetrical structure on the lower front side of the structural compensation bracket body, and two horizontal support holes (12) of symmetrical structure on the upper part of the structural compensation bracket body.

[0009] The beneficial effects of this invention are: by designing a structural compensation bracket to compensate for the convexity of the protrusion range, and then combining it with the method of this invention, the taper of the side concave slab continuous casting crystallizer can be measured using a conventional mechanical taper meter. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structural compensation support of the present invention in use; Figure 2 This is a schematic diagram of the mechanical taper used in this invention; Figure 3 This is a schematic diagram of the three views of the structural compensation bracket of the present invention; Among them, 1. two horizontal fulcrums, 2. two vertical fulcrums, 3. a third vertical fulcrum, 4. a taper gauge, 5. a taper bubble level, 6. a taper adjustment knob, 7. a horizontal bubble level, 8. a level adjustment knob, 9. a structural compensation bracket, 10. a narrow-side copper plate of the continuous casting crystallizer for the concave slab on the side to be measured, 11. two vertical support feet, and 12. two taper gauge horizontal fulcrum holes. Detailed Implementation

[0011] To fully understand the purpose, features and effects of the present invention, the present invention will be described in detail through the following specific embodiments, but the present invention is not limited thereto.

[0012] This embodiment uses the measurement of the taper of the narrow side copper plate in the continuous casting crystallizer for producing 200mm*1020mm side-concave slabs at a steel plant as an example.

[0013] Convexity: The vertical convexity height (unit: mm) of the highest point of the curved surface in the middle of the narrow side copper plate of the concave slab continuous casting crystallizer relative to the straight reference planes on both sides of the copper plate is the core dimensional parameter describing the degree of convexity of the transverse curved surface of the narrow side copper plate.

[0014] The working surface of the narrow copper plate in the concave crystallizer is not flat: the left and right ends of the copper plate are flat reference surfaces, and along the width direction of the copper plate, the middle area arches towards the inner cavity of the crystallizer (steel side) to form an arc convex surface.

[0015] Taper (inverted taper, longitudinal parameter) is the vertical height (up and down) of the concave slab continuous casting crystallizer. The upper opening of the inner wall is larger than the lower opening, and it is wider at the top and narrower at the bottom. It is used to compensate for the downward solidification shrinkage of the slab and to prevent air gaps between the slab shell and the copper wall. In the industry, it is called inverted taper.

[0016] Taper describes the degree of inclination of the generatrix in the vertical direction. It is assumed by default that the inner wall of the narrow side copper plate of the concave slab continuous casting crystallizer is a straight line (without protrusions).

[0017] In the narrow side horizontal cross-section (left and right transverse) of the copper plate in the concave slab continuous casting crystallizer, the middle area of ​​the copper plate bulges inward (protruding towards the casting billet), and the two ends are straight; the bulge measurement is the vertical distance from the highest point of the copper plate center to the line connecting the two ends (bulge height, unit: mm).

[0018] Taper (longitudinal - vertical): The change in dimension from top to bottom, whether the generatrix is ​​slanted or not; measured vertically using a mechanical taper meter.

[0019] Convexity measurement (horizontal-left-right): On the same height section, whether the middle of the copper plate is bulging or not; on the same horizontal plane, measure the amount of bulging at the two ends opposite to the middle.

[0020] Two fixed saddles (L-shaped support rod and measuring rod) are arranged vertically along the crystallizer (fixed span H, vertical spacing); two reference probes (two vertical plane support points) are attached to the wall vertically, and the movable probe (the third vertical plane support point) reads the difference in dimensions between the upper and lower points to calculate the longitudinal taper.

[0021] A method for measuring the taper of the narrow-side copper plate in a concave slab continuous casting mold includes the following steps. Step 1: Prepare a structural compensation bracket 9 based on the convexity of the narrow-side copper plate 10 of the continuous casting crystallizer of the concave slab to be tested and the distance between the two horizontal fulcrums 1 of the mechanical taper instrument used for measurement.

[0022] The narrow-side copper plate 10 of the concave slab continuous casting crystallizer to be tested has a cross-section of 200mm*1020mm and a convexity of 10mm. The distance between the two horizontal support points 1 of the mechanical taper instrument used for measurement is 100mm.

[0023] The structural compensation bracket 9 must meet the following requirements: The total width of the structural compensation bracket 9 is the same as the width of the narrow-side copper plate 10 of the concave slab continuous casting mold on the side to be measured, which is 200mm; the thickness of the vertical support foot 11 of the structural compensation bracket 9 is equal to the convexity of the narrow-side copper plate 10 of the concave slab continuous casting mold on the side to be measured, which is 10mm; the distance between the two horizontal support point holes 12 of the taper instrument on the structural compensation bracket 9 is equal to the distance between the two horizontal support points 1 of the mechanical taper instrument used for measurement, which is 100mm; the material of the structural compensation bracket 9 is Q235B, with a thickness of 15mm. Figure 1 and 3 As shown. The mechanical taper used for measurement is as follows: Figure 2 As shown, it could be a GET-SM80 mechanical taper meter, etc., which can be purchased directly from the market.

[0024] Step 2, during use, such as Figure 1 As shown, the structural compensation bracket 9 is placed on the horizontal plane above the narrow side copper plate 10 of the concave slab continuous casting crystallizer to be tested. The side of the structural compensation bracket 9 is aligned with the side of the narrow side copper plate 10 of the concave slab continuous casting crystallizer to be tested. The vertical support foot 11 of the structural compensation bracket 9 is close to the test surface of the narrow side copper plate 10 of the concave slab continuous casting crystallizer to be tested. Step 3: Rotate the taper adjustment knob 6 of the mechanical taper meter used for measurement counterclockwise to zero; Step 4: Place the two horizontal support points 1 of the mechanical taper instrument used for measurement into the two horizontal support point holes 12 of the structural compensation bracket 9, and adjust the horizontal adjustment knob 8 of the mechanical taper instrument used for measurement so that the bubble of the horizontal bubble level 7 is in the middle, ensuring that the two vertical support points 2 of the mechanical taper instrument used for measurement are close to the middle of the test surface of the narrow side copper plate 10 of the concave slab continuous casting crystallizer on the side to be measured. Step 5: Adjust the taper adjustment knob 6 of the mechanical taper meter used for measurement. When the bubble of the taper bubble level 5 of the mechanical taper meter used for measurement is in the middle, read the reading of the taper gauge 4 of the mechanical taper meter used for measurement. This is the taper value of the narrow side copper plate 10 of the concave slab continuous casting crystallizer to be measured. In this embodiment, the taper value is 5.64mm.

Claims

1. A method for measuring the taper of the narrow-side copper plate in a concave slab continuous casting mold, characterized in that: Follow these steps Step 1: Based on the convexity of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested and the distance between the two horizontal support points (1) of the mechanical taper instrument used for measurement, prepare a structural compensation bracket (9) that satisfies the following conditions: the total width of the structural compensation bracket (9) is the same as the width of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested; the thickness of the vertical support foot (11) of the structural compensation bracket (9) is equal to the convexity of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested; and the distance between the two taper instrument horizontal support point holes (12) of the structural compensation bracket (9) is equal to the distance between the two horizontal support points (1) of the mechanical taper instrument used for measurement. Step 2: During use, place the structural compensation bracket (9) on the horizontal plane above the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested. Align the side of the structural compensation bracket (9) with the side of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested. The vertical support foot (11) of the structural compensation bracket (9) is close to the test surface of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be tested. Step 3: Rotate the taper adjustment knob (6) of the mechanical taper meter used for measurement counterclockwise to zero; Step 4: Place the two horizontal support points (1) of the mechanical taper instrument used for measurement into the two horizontal support point holes (12) of the structural compensation bracket (9), adjust the horizontal adjustment knob (8) of the mechanical taper instrument used for measurement so that the bubble of the horizontal bubble level (7) is in the middle, and ensure that the two vertical support points (2) of the mechanical taper instrument used for measurement are close to the middle of the test surface of the narrow side copper plate (10) of the concave slab continuous casting crystallizer on the side to be measured; Step 5: Adjust the taper adjustment knob (6) of the mechanical taper instrument used for measurement. When the bubble of the taper bubble level (5) of the mechanical taper instrument used for measurement is in the middle, read the reading of the taper table (4) of the mechanical taper instrument used for measurement, which is the taper value of the narrow side copper plate (10) of the concave slab continuous casting crystallizer to be measured.

2. The method for measuring the taper of the narrow-side copper plate in a concave slab continuous casting crystallizer according to claim 1, characterized in that: The mechanical taper measuring instrument includes an L-shaped support rod, a measuring rod, two horizontal fulcrums (1), two vertical fulcrums (2), a third vertical fulcrum (3), a taper gauge (4), a taper bubble level (5), a taper adjustment knob (6), a horizontal bubble level (7), and a level adjustment knob (8). The taper gauge (4) and the taper bubble level (5) are mounted on the upper crossbar of the L-shaped support rod. The lower part of the measuring rod has a third vertical fulcrum (3), and the middle part of the measuring rod has a vertical guide rod. Two vertical plane support points (2) are installed at both ends of the vertical plane guide rod. A horizontal guide rod is installed at the upper part of the measuring rod. Two horizontal support points (1) are installed at both ends of the horizontal guide rod. A horizontal plane bubble level (7) is installed at the center of the upper part of the horizontal guide rod. A horizontal adjustment knob (8) for adjusting the horizontal plane bubble level (7) is installed on the horizontal guide rod. The lower part of the L-shaped support rod is hinged to the measuring rod. The upper part of the L-shaped support rod is connected to the measuring rod through an adjustable tilt device. A taper adjustment knob (6) is installed on the adjustable tilt device.

3. The method for measuring the taper of the narrow-side copper plate in a concave slab continuous casting crystallizer according to claim 1, characterized in that: The structural compensation bracket (9) includes a structural compensation bracket body, with two vertical support feet (11) of symmetrical structure on the lower front side of the structural compensation bracket body, and two horizontal support holes (12) of symmetrical structure on the upper part of the structural compensation bracket body.

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