Hot steel sheet dislocation separation device and dislocation separation method

Abstract

This invention relates to a staggered separation device and method for hot steel plates, belonging to the field of hot steel plate processing technology. It includes a first pinch-and-separate roller and a second pinch-and-separate roller arranged in parallel. The first pinch-and-separate roller has a first pinch-and-separate roller section and a first separation roller section, and the second pinch-and-separate roller has a second pinch-and-separate roller section and a second separation roller section. The first separation roller section is positioned corresponding to the second pinch-and-separate roller section, and the second separation roller section is positioned corresponding to the first pinch-and-separate roller section. Along the axial direction of the first pinch-and-separate roller, the first separation roller section and the second separation roller section are staggered, and the distance between the first separation roller section and the second separation roller section is smaller than the distance between the first pinch-and-separate roller section and the second separation roller section. This invention provides better quality shear cuts, utilizes the residual heat of the hot steel plate, and allows for continued short-process hot processing such as hot roll bending. It has high energy efficiency, eliminates the need to wait for the hot steel plate to cool, and simplifies production processes, improving production efficiency.

Description

Technical Field

[0001] This invention relates to the field of hot steel plate processing technology, and in particular to a misalignment separation device and method for hot steel plates. Background Technology

[0002] Currently, hot steel plates produced by hot-rolling mills are typically slit after cooling. The high temperature of the hot steel plates after rolling cannot be used for subsequent hot processing such as bending. Performing finishing processes after the hot steel plates cool to room temperature presents the problem of long production lines, usually requiring the use of cranes and intermediate storage areas, resulting in high energy consumption and production costs, which does not align with the development direction of green, efficient, and streamlined processes. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a slip separation device and slip separation method for hot steel plates, which solves the problem that the thermal energy of hot steel plates cannot be utilized when longitudinally cutting them after cooling in the prior art.

[0004] To achieve the above and other related objectives, the present invention provides a slip-separation device for hot steel plates, comprising a first clamping separation roller and a second clamping separation roller arranged in parallel, wherein a clamping separation channel for the hot steel plate to pass through is provided between the first clamping separation roller and the second clamping separation roller;

[0005] The first pinch-and-separate roller has a first pinch-and-separate roller section and a first separation roller section, and the second pinch-and-separate roller has a second pinch-and-separate roller section and a second separation roller section. The first separation roller section and the second separation roller section are offset from each other along the axial direction of the first pinch-and-separate roller.

[0006] In the thickness direction of the hot steel plate, the first separating roller portion is disposed corresponding to the second pinch roller portion, the second separating roller portion is disposed corresponding to the first pinch roller portion, and the distance between the first separating roller portion and the second separating roller portion is smaller than the distance between the first pinch roller portion and the second separating roller portion.

[0007] Optionally, the outer diameter of the first separating roller section is larger than the outer diameter of the first pinch roller section, and the outer diameter of the second separating roller section is larger than the outer diameter of the second pinch roller section.

[0008] Optionally, both the first separating roller section and the second separating roller section are roller rings, and the first pinch roller section is provided with a roller groove at the position corresponding to the second separating roller section, and the second pinch roller section is provided with a roller groove at the position corresponding to the first separating roller section.

[0009] Optionally, the width of the roller groove is a, and the width of the roller ring is b, where a ≥ 3b.

[0010] Optionally, the height difference between the top of the roller ring and the bottom of the roller groove is h, where h ≤ 3 mm.

[0011] Optionally, in the axial direction of the first clamping separating roller, there is an axial distance between the first separating roller portion and the second separating roller portion.

[0012] Optionally, the roll gap between the first separating roll section and the second separating roll section is zero roll gap or positive roll gap.

[0013] This invention also provides a method for separating hot steel plates by slippage, used to separate longitudinally cut hot steel plates, comprising:

[0014] The longitudinally cut hot steel plate forms at least two parts to be separated along the width direction, and there is an adhesive part between adjacent parts to be separated and they are connected to each other through the adhesive part.

[0015] Along the thickness direction of the hot steel plate, a first force and a second force are applied to two adjacent parts to be separated, so that the two parts to be separated are separated from the adhesive part. The direction of the first force is opposite to the direction of the second force.

[0016] Optionally, the dimension of the adhesive portion in the thickness direction of the hot steel plate is d, the thickness of the hot steel plate is D, d≤1mm, or d≤0.05D.

[0017] Alternatively, d < 0.5 mm, or d < 0.03D.

[0018] Optionally, the thickness of the hot-state steel plate is 4.5 mm to 25 mm.

[0019] Optionally, the temperature of the hot steel plate is 600℃~900℃.

[0020] This invention discloses a method for separating hot steel plates by slippage, used to separate longitudinally slit hot steel plates.

[0021] Using the slip separation device as described in any of the preceding claims, including:

[0022] The longitudinally cut hot steel plate forms at least two parts to be separated along the width direction, and there is an adhesive part between two adjacent parts to be separated and they are connected to each other through the adhesive part.

[0023] The hot steel plate is fed between the first pinch-separation roller and the second pinch-separation roller. The first separation roller and the second separation roller act on two adjacent parts to be separated and apply forces respectively. The forces applied by the first separation roller and the second separation roller are in opposite directions, so that the adhesive parts between the two adjacent parts to be separated are separated.

[0024] As described above, the hot-state steel plate separation device and method of the present invention have the following beneficial effects: Since the hot-state steel plate is in a hot state, the quality of the sheared fracture is better compared to the traditional cold shearing process. During the hot-state steel plate separation process, the residual heat of the hot-state steel plate is utilized, and the separated hot-state steel plate can continue to undergo short-process hot processing such as hot roll bending, resulting in a higher overall energy efficiency ratio for the production line and promoting energy conservation and consumption reduction. Direct separation of the hot-state steel plate eliminates the need to wait for it to cool, simplifying production processes and improving production efficiency. Simplified production processes help shorten production line length, reduce equipment and space investment, and lower production and operating costs. Attached Figure Description

[0025] Figure 1 The diagram shown is one of the structural schematic diagrams of the misalignment separation device in an embodiment of the present invention;

[0026] Figure 2 Displayed as Figure 1 A magnified view of a portion of the image;

[0027] Figure 3 The diagram shown is a second structural schematic of the misalignment separation device in an embodiment of the present invention;

[0028] Figure 4 Displayed as Figure 3 A magnified view of a portion of the image;

[0029] Figure 5 The diagram shown is a partially enlarged schematic of the hot-state steel plate adhesion portion in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached drawings: 1. First separating roller section; 2. First pinch roller section; 3. Roller ring; 4. Roller groove; 5. Hot steel plate; 6. Section to be separated; 7. Second separating roller section; 8. Second pinch roller section. Detailed Implementation

[0031] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0032] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show components relevant to the present invention and are not drawn according to the actual number, shape, and size of components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. The structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation conditions of the present invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effects and objectives of the present invention, should still fall within the scope of the technical content disclosed in the present invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are only for clarity of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the present invention.

[0033] Please see Figures 1-5 This embodiment provides a sliding separation device for hot steel plates, including two parallel pinch separation rollers. The axes of the two pinch separation rollers are parallel to each other, and the arrangement direction of the two pinch separation rollers is perpendicular to the axial direction of the pinch separation rollers. The two pinch separation rollers are a first pinch separation roller and a second pinch separation roller.

[0034] The first and second pinch-separation rollers are spaced apart, and a pinch-separation channel for the hot steel plate is provided between the two pinch-separation rollers. In the thickness direction of the hot steel plate, the first separation roller section 1 is provided corresponding to the second pinch-separation roller section 8, and the second separation roller section 7 is provided corresponding to the first pinch-separation roller section 2. That is, in the arrangement direction of the two pinch-separation rollers, the separation roller section of one pinch-separation roller is provided corresponding to the pinch-separation roller section of the other pinch-separation roller.

[0035] The pinch-and-separate roller has a separation roller section and a pinch-and-separate roller section. Specifically, the first pinch-and-separate roller has a first pinch-and-separate roller section 2 and a first separation roller section 1, and the second pinch-and-separate roller has a second pinch-and-separate roller section 8 and a second separation roller section 7. In the axial direction of the first pinch-and-separate roller, the first separation roller section 1 and the second separation roller section 7 are staggered, that is, in the arrangement direction of the two pinch-and-separate rollers, there is no intersection between the projections of the two first separation roller sections 1 and the projections of the second separation roller sections 7.

[0036] The distance between the first separating roller section 1 and the second separating roller section 7 is less than the distance between the first pinch roller section 2 and the second separating roller section 7. That is, in the arrangement direction of the two pinch separating rollers, the distance between the first separating roller section 1 and the second separating roller section 7 is less than the distance between the first pinch roller section 2 and the second separating roller section 7.

[0037] Specifically, both the first separating roller section 1 and the second separating roller section 7 are roller rings, and the first pinch roller section 2 is provided with roller grooves at the position corresponding to the second separating roller section 7, and the second pinch roller section 8 is provided with roller grooves at the position corresponding to the first separating roller section 1.

[0038] In this embodiment, two pinch-separation rollers are arranged parallel to each other and vertically, with their axes laid out horizontally. In practice, the hot-rolled steel plate separation device can be used independently or installed at the outlet of the shearing and slitting device for the hot-rolled steel plate 5, working in conjunction with the shearing and slitting device. Specifically, the hot-rolled steel plate separation device can be installed at the outlet of a medium-thick plate mill, a hot-rolled steel mill, or a suitable downstream location to perform separation of the hot-rolled steel plate 5. The hot-rolled steel plate separation device can also be used in conjunction with a hot roll bending unit. This device enables rapid online slitting of the hot-rolled steel plate 5, utilizing the waste heat of the hot-rolled steel plate 5, resulting in energy savings, reduced consumption, and significant cost reduction.

[0039] The hot-state steel plate 5, after cold shearing, has a right-angled flat cross-section. Before subsequent welding, it generally needs to have shear cracks cleaned and beveled. The cross-sectional shape of the hot-state steel plate 5 is determined by the contour of the rolling ring 3. In actual production, the cross-sectional shape of the hot-state steel plate 5 can be adjusted according to the application by changing the contour of the rolling ring 3. For example, the cross-section can be made into a bevel shape that facilitates welding, thus providing a more convenient raw material (hot-state steel plate 5) for users requiring large-scale welding. After the shearing process, the fracture surface of the hot-state steel plate 5 has good quality, with only a few easily handled burrs, or even none at all.

[0040] The cutting arrangement of hot steel plate 5 is located at the exit or downstream of the strip mill. The produced hot steel plate 5 can be used for short-process hot processing such as hot roll bending, reducing energy consumption and achieving green and efficient operation. The staggered separation of hot steel plate 5 replaces the cold shearing process, eliminating the need for a cooling process, shortening the production line length of the strip mill, simplifying the production process, reducing equipment and site investment, and lowering production and operating costs.

[0041] In this embodiment, the clamping and separating roller of the hot steel plate staggered separation device is actually a type of clamping roller, suitable for various transmission methods. It can be a clamping roller with separate upper and lower transmissions, or a clamping roller with upper and lower group transmissions or a single transmission. In this embodiment, the staggered separation device uses the roller shape change of the clamping roller to complete the staggered separation. While retaining the function of clamping and transporting the hot steel plate 5, it also realizes the additional function of separating the hot steel plate 5. The equipment is simple and reliable.

[0042] In some embodiments, in a first direction, there is an axial gap between the two separating roller sections, and the roller gap between the two separating roller sections is zero or positive.

[0043] The first pinch roller section 2 is provided with a roller groove at the position corresponding to the second separation roller section 7, and the second pinch roller section 8 is provided with a roller groove at the position corresponding to the first separation roller section 1.

[0044] Specifically, such as Figure 1 , Figure 2 As shown, in some embodiments, the separating roller section is a roller ring, that is, both the first separating roller section 1 and the second separating roller section 7 are roller rings.

[0045] The pinch roller section has a roller groove on the roller ring corresponding to the other pinch separating roller in the second direction. That is, the first pinch roller section 2 is provided at the position corresponding to the second separating roller section 7, and the second pinch roller section 8 is provided at the position corresponding to the first separating roller section 1. The roller ring and the roller groove respectively surround the pinch separating roller.

[0046] In this embodiment, the width of the roller groove is 'a', and the width of the roller ring is 'b', where a ≥ 3b. Figure 2 As shown, in this embodiment, the height difference between the top of the roller ring and the bottom of the roller groove is h, where h ≤ 3 mm.

[0047] In this embodiment, when the pinch separation roller in the hot steel plate slip separation device adopts such as Figures 1-2 In the structure described above, each pinch-separation roller has a roller ring 3 and a roller groove 4. The roller ring 3 is higher than the reference roller surface of the pinch-separation roller, and the bottom surface of the roller groove is lower than the reference roller surface of the pinch-separation roller. When the hot steel plate 5 has not entered between the pinch-separation rollers, the roller ring 3 of the first pinch-separation roller fits into the roller groove 4 at the corresponding position of the second pinch-separation roller, and correspondingly, the roller ring 3 of the second pinch-separation roller also fits into the roller groove 4 at the corresponding position of the first pinch-separation roller. The depth of the roller groove 4 recessed into the reference roller surface is greater than the height of the roller ring 3 protruding from the reference roller surface. Therefore, the working areas on the pinch-separation roller used to separate the two parts 6 to be separated will not contact each other. At the same time, the remaining reference roller surfaces of the two pinch-separation rollers can approach and contact each other, so that the two pinch-separation rollers can maintain the normal set clamping force.

[0048] When the hot steel plate 5 that needs to be separated enters between the two clamping separation rollers, the cuts of the two parts to be separated 6, that is, the positions of the adhesive parts in the first direction, correspond to the axial distance between the two separation roller parts.

[0049] When the hot steel plate 5 enters between the two pinch-separation rollers, the roller ring 3 on one pinch-separation roller, which extends above the reference roller surface, applies a force in the thickness direction of the corresponding part to be separated 6 near the cut area of ​​the hot steel plate 5, i.e., the part of the corresponding part to be separated 6 near the adhesive portion. This causes a slight movement of the cut surface of the corresponding part to be separated 6 in the thickness direction of the hot steel plate 5. Similarly, the roller ring 3 on the other pinch-separation roller, which also extends above the reference roller surface, applies a force in the thickness direction of the corresponding part to be separated 6 near the cut area of ​​the hot steel plate 5, i.e., the part of the corresponding part to be separated 6 near the adhesive portion. This causes a slight movement of the cut surface of the corresponding part to be separated 6 in the thickness direction of the hot steel plate 5. At this time, the two parts to be separated 6 move in opposite directions at the cut area, i.e., where the adhesive portion is located. Therefore, the two parts to be separated 6 are completely separated, resulting in two separated hot steel plates.

[0050] Meanwhile, since the roller ring 3 on one pinch separation roller and the roller groove 4 on the other pinch separation roller are arranged accordingly, the width of the roller groove 4 is more than three times the width of the roller ring 3, and the height of the roller ring 3 above the bottom surface of the roller groove 4 does not exceed 3mm, which can prevent the hot steel plate 5 from producing obvious creases or warping.

[0051] like Figure 3 , Figure 4 As shown, in some other embodiments, the pinch-and-separate roller is a stepped roller type, with the separation roller section and the pinch-and-separate roller section arranged in steps.

[0052] When the pinch separating rollers in the hot steel plate slip separation device are used as follows Figures 3-4 In the structure, the pinch-and-separate roller is a stepped roller type, and the separation roller section and the pinch-and-separate roller section are arranged in a stepped manner. The separation roller section of the first pinch-and-separate roller and the pinch-and-separate roller section are matched.

[0053] When the hot steel plate 5 is not between the two pinch separation rollers, the first pinch separation roller and the second pinch separation roller can approach each other and make contact, so that the two pinch separation rollers can maintain the normal set clamping force.

[0054] When the hot steel plate 5 that needs to be separated enters, the height between the pinch roller section and the separation roller section of the pinch roller is inconsistent, which causes the two parts to be separated 6 to be misaligned in the thickness direction of the hot steel plate 5, thereby causing the two parts to be separated 6 to be completely separated.

[0055] This embodiment also provides a method for separating hot steel plates by slippage, used to separate longitudinally cut hot steel plates, including the following steps:

[0056] S1: The longitudinally cut hot steel plate forms at least two parts to be separated along the width direction, and there is an adhesive part between adjacent parts to be separated and they are connected to each other through the adhesive part.

[0057] S2: Along the thickness direction of the hot steel plate, a first force and a second force are applied to two adjacent parts to be separated, so that the two parts to be separated are separated from the adhesive part. The direction of the first force is opposite to the direction of the second force.

[0058] In this embodiment, the hot steel plate 5 is a medium-thick plate, that is, the thickness of the hot steel plate 5 is 4.5mm to 25mm. If the hot steel plate 5 is too thick, it is difficult to move and separate. If the hot steel plate 5 is too thin, the separation can be completed in the cutting stage.

[0059] In this embodiment, the temperature of the hot steel plate is 600℃~900℃, that is, the forming temperature of the raw material hot steel plate 5 is between 600℃ and 900℃. This temperature can be achieved by utilizing the residual temperature of the hot steel plate 5 after hot rolling. If the residual temperature of the hot steel plate 5 is insufficient, it can also be achieved by supplementing the temperature of the hot steel plate 5.

[0060] Specifically, before step S1, the hot steel plate can be slit by rolling with a roller ring. When the medium-thick plate to be slit is rolled by the roller ring, if the roller gap between the roller ring of the first pinch separation roller and the roller ring of the second pinch separation roller is zero or positive, it is necessary to control the cut cross-section of the hot steel plate to make the adhesive part of the hot steel plate 5 as thin and few as possible, so that in step S2, the two parts to be separated 6 can be completely separated by making the two adjacent parts to be separated 6 staggered up and down.

[0061] Cold shearing typically results in defects such as microcracks, overlapping tool marks, and misalignment at the fracture surface. Hot shearing, which is essentially rolling, avoids these defects. In this embodiment, hot steel plate 5 undergoes misalignment separation, resulting in a better quality shear fracture surface compared to cold shearing after the hot steel plate 5 has cooled to room temperature.

[0062] In step S1, the dimension of the adhesive portion in the thickness direction of the hot steel plate is d, and the thickness of the hot steel plate is D, where d ≤ 1 mm or d ≤ 0.05D. Specifically, in this embodiment, d < 0.5 mm or d < 0.03D. The smaller the dimension of the adhesive portion in the thickness direction of the hot steel plate 5, the easier it is to separate the two parts 6 to be separated, but the higher the requirements for the previous hot-state slitting process.

[0063] This embodiment also provides a method for separating hot steel plates by means of a slip-separation device as described above, which is used to separate the longitudinally cut hot steel plates, and includes the following steps:

[0064] The longitudinally cut hot steel plate forms at least two parts to be separated along the width direction, and there is an adhesive part between adjacent parts to be separated and they are connected to each other through the adhesive part.

[0065] The hot steel plate is fed between two pinch separation rollers, that is, between the first pinch separation roller and the second pinch separation roller. The separation rollers of the two pinch separation rollers act on the two adjacent parts to be separated and apply force respectively. That is, the first separation roller 1 and the second separation roller 7 act on the two adjacent parts to be separated and apply force respectively. The forces applied by the two separation rollers are in opposite directions, that is, the forces applied by the first separation roller 1 and the second separation roller 7 are in opposite directions, so that the adhesive parts between the two adjacent parts to be separated are separated.

[0066] In summary, the hot steel plate separation device and method provided in this embodiment, due to the hot state of the steel plate, achieves better quality sheared fracture surfaces compared to traditional cold shearing processes. During the hot steel plate separation process, the heat of the hot steel plate is utilized, and the separated hot steel plate can continue to undergo short-process hot processing such as hot roll bending, resulting in a higher overall energy efficiency ratio for the production line and promoting energy conservation and consumption reduction. Direct separation of the hot steel plate eliminates the need for cooling, simplifying production processes and improving production efficiency. This simplified production process also helps to shorten production line length, reduce equipment and space investment, and lower production and operating costs.

[0067] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A device for separating the slippage of a hot steel plate, characterized in that, The device includes a first pinch-and-separate roller and a second pinch-and-separate roller arranged in parallel, with a pinch-and-separate channel between the first pinch-and-separate roller and the second pinch-and-separate roller for the passage of the hot steel plate. The first pinch-and-separate roller has a first pinch-and-separate roller portion and a first separation roller portion, and the second pinch-and-separate roller has a second pinch-and-separate roller portion and a second separation roller portion. In the axial direction of the first pinch-and-separate roller, the first separation roller portion is disposed corresponding to the second pinch-and-separate roller portion, and the second separation roller portion is disposed corresponding to the first pinch-and-separate roller portion. The distance between the first separation roller portion and the second separation roller portion is smaller than the distance between the first pinch-and-separate roller portion and the second separation roller portion. In the axial direction of the first clamping separating roller, there is an axial distance between the first separating roller section and the second separating roller section.

2. The hot steel sheet jog-off apparatus according to claim 1, characterized by The outer diameter of the first separating roller section is larger than the outer diameter of the first pinch roller section, and the outer diameter of the second separating roller section is larger than the outer diameter of the second pinch roller section.

3. The hot steel sheet jog-off apparatus according to claim 2, characterized by Both the first separating roller section and the second separating roller section are roller rings. Roller grooves are respectively provided on the first pinch roller section at the position corresponding to the second separating roller section, and on the second pinch roller section at the position corresponding to the first separating roller section.

4. The hot steel sheet jog-off apparatus according to claim 3, characterized by The width of the roller groove is a, and the width of the roller ring is b, where a ≥ 3b.

5. The hot steel plate slip separation device according to claim 3, characterized in that, The height difference between the top of the roller ring and the bottom of the roller groove is h, where h ≤ 3 mm.

6. The hot steel plate slip separation device according to claim 1, characterized in that, The gap between the first separating roller section and the second separating roller section is zero gap or positive gap.

7. A method for separating hot steel plates by slippage, used to separate longitudinally cut hot steel plates, employing the slippage separation device as described in any one of claims 1 to 5, characterized in that... include: The longitudinally cut hot steel plate forms at least two parts to be separated along the width direction, and adjacent parts to be separated have an adhesive part and are connected to each other through the adhesive part. The hot steel plate is fed between the first pinch-separation roller and the second pinch-separation roller. The first separation roller and the second separation roller act on two adjacent parts to be separated, respectively. Along the thickness direction of the hot steel plate, a first force and a second force are applied to the two adjacent parts to be separated, so that the two parts to be separated are separated from the adhesive part. The direction of the first force is opposite to the direction of the second force.

8. The method for separating hot steel plates according to claim 7, characterized in that, The dimension of the adhesive portion in the thickness direction of the hot steel plate is d, and the thickness of the hot steel plate is D, where d ≤ 1 mm or d ≤ 0.05D.

9. The method for separating hot steel plates according to claim 8, characterized in that, d < 0.5 mm, or d < 0.03 D.

10. The method for separating hot steel plates according to claim 7, characterized in that, The thickness of the hot-state steel plate is 4.5mm to 25mm.

11. The method for separating hot steel plates according to claim 7, characterized in that, The temperature of the hot steel plate is 600℃~900℃.

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