Moisture removal device, measuring device, steel plate manufacturing device, and moisture removal method

Abstract

To provide a moisture removal device which removes moisture adhering to a surface of a steel plate having projections and grooves formed on the surface.SOLUTION: A moisture removal device removes moisture adhering to a surface of a steel plate having the surface formed in an irregular form. The moisture removal device has: a transport unit which transports the steel plate in one direction; a run-out table which sprays water to the steel plate to cool the steel plate; and an air discharge unit which is provided at the downstream side relative to the run-out table in the one direction and discharges air to the steel plate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a moisture removal device that removes moisture adhering to the surface of a steel plate, a measuring device that measures the shape of a steel plate, a steel plate manufacturing device, and a moisture removal method. [Background technology]

[0002] The hot rolling process includes a finish rolling process in which the hot rolled steel sheet is finish-rolled, and a cooling process in which the hot rolled steel sheet is cooled with cooling water after the finish rolling process. In the cooling process, cooling water is uniformly supplied to the hot rolled steel sheet to prevent uneven heating. For this reason, so-called draining is performed to remove cooling water that has been supplied in excess to the hot rolled steel sheet.

[0003] As an example of such a cooling water draining device, Patent Document 1 discloses a cooling water draining device for hot-rolled steel sheets that has a first draining section in which nozzles are arranged in the width direction of the steel sheet and a second draining section in which nozzles are arranged in the conveying direction of the steel sheet.

[0004] Incidentally, the dimensions and shape of rolled steel produced in a hot rolling process are measured for quality assurance. For example, when deformed steel is produced by hot rolling, its cross-sectional shape is measured using a laser. As a method for measuring the cross-sectional shape of such rolled steel, Patent Document 2 discloses a method for measuring the right-angled cross-sectional shape of deformed steel, which includes an image data acquisition step of acquiring image data of the right-angled cross-sectional shape of the deformed steel based on the reflected light of a laser beam from the deformed steel. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-177387 [Patent Document 2] Japanese Patent Publication No. 2020-139907 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when the water draining method for hot-rolled steel sheets described in Patent Document 1 is used on steel sheets having protrusions or grooves formed on the surface, water may remain between the protrusions or grooves. When the cross-sectional shape is measured in such a state using the method described in Patent Document 2, the water affects the reflection of the laser light, resulting in a problem of reduced measurement accuracy of the dimensions and shape.

[0007] The present invention has been made in consideration of the above-mentioned problems, and aims to provide a moisture removal device that removes moisture adhering to the surface of a steel plate having protrusions or grooves formed on the surface, a measuring device that measures the shape of the steel plate, a steel plate manufacturing device, and a moisture removal method. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention has the following features.

[0009] [1] A moisture removal device for removing moisture adhering to a surface of a steel plate having an uneven surface, a conveying section that conveys the steel plate in one direction; a run-out table that sprays water toward the steel plate to cool the steel plate; an air ejection unit that is provided downstream of the run-out table in the one direction and ejects air toward the steel plate; A moisture removal device having: [2] The air ejection unit ejects the air across the width direction of the steel plate. [1] The moisture removal device according to the present invention. [3] The moisture removal device according to [1] or [2], wherein the air ejection section is provided at a position higher than the steel plate in the thickness direction of the steel plate. [4] [1] or [2], and a moisture removal device according to the present invention. a measuring unit that measures the shape of the steel plate; A measuring device having: [5] [1] or [2]. A steel plate manufacturing apparatus comprising the moisture removal device according to the present invention. [6] A moisture removal method for removing moisture adhering to a surface of a steel plate having an uneven surface, comprising: a conveying step of conveying the steel plate in one direction; a cooling step of spraying water onto the steel plate; an air ejection step of ejecting air toward the steel plate; A moisture removal method comprising: [7] In the air injection step, The air is discharged so as to resist the movement of the moisture in the one direction, The moisture removal method according to [6], wherein the force of the air resisting the movement of the moisture is greater than the inertial force that moves the moisture in the one direction. [8] The moisture removal method according to [6], wherein in the air ejection step, the air is ejected so as to blow away the moisture. [Effects of the Invention]

[0010] The moisture removal device of the present invention is provided downstream of a run-out table that cools the steel plate in one direction in which the steel plate is transported, and has an air ejection unit that ejects air toward the steel plate. This makes it possible to remove moisture adhering to the surface of a steel plate having protrusions or grooves formed on the surface. Therefore, even when shape measurement is performed using a laser, the measurement accuracy can be improved.

[0011] Furthermore, since the measuring device of the present invention is configured to include the moisture removal device, it is possible to improve the accuracy of measuring the shape of the steel plate.

[0012] Furthermore, since the steel plate manufacturing apparatus of the present invention is configured to include the moisture removal device, it is possible to improve the accuracy of measuring the shape of the steel plate manufactured by the manufacturing apparatus.

[0013] Furthermore, since the moisture removal method of the present invention includes an air ejection step of ejecting air toward the steel sheet, it is possible to remove moisture adhering to the surface of the steel sheet, and therefore it is possible to improve the measurement accuracy even when shape measurement is performed using a laser. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is an explanatory diagram showing the configuration of a steel plate manufacturing apparatus having a moisture removal device. [Figure 2] FIG. 4 is an explanatory diagram showing the relationship between the air discharged from the air discharge portion and the steel sheet. [Figure 3] FIG. 4 is an explanatory diagram showing a manner in which the shape of the steel plate is measured by a measuring unit. [Figure 4] FIG. 1 is a flow chart showing the process of a moisture removal method. [Figure 5] FIG. 5 is an explanatory view showing an aspect of the air ejection step in FIG. 4. [Figure 6] FIG. 10 is an explanatory diagram showing the configuration of a steel plate manufacturing apparatus having a moisture removing device according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the configuration of a steel plate manufacturing apparatus 100 having a moisture removal device. As shown in FIG. 1, the steel plate manufacturing apparatus 100 includes a conveying section 20 that conveys a steel plate 10 in one direction D and a finishing mill 30 that continuously rolls the steel plate 10 to a predetermined thickness. The steel plate manufacturing apparatus 100 also includes a run-out table 40 that cools the steel plate 10 rolled by the finishing mill 30 with cooling water, and an air discharge section 50 that discharges air toward the steel plate 10. The steel plate manufacturing apparatus 100 also includes a measuring section 60 that measures the shape of the steel plate 10 and a winding device 70 that winds the steel plate 10 into a coil. The conveying section 20, the run-out table 40, and the air discharge section 50 form a moisture removal device.

[0016] The steel plate 10 has an uneven surface 11 formed in an uneven shape on at least one of the front and back surfaces. The uneven surface 11 is preferably provided on the surface of the run-out table 40 to which cooling water is supplied. In this embodiment, the uneven surface 11 is formed on the front surface, and has a plurality of convex portions formed parallel to one another along one direction D.

[0017] The steel plate 10 used is one that has been rolled by a roughing mill (not shown). The uneven surface 11 is not limited to this embodiment, and may be, for example, a so-called checkered steel plate in which small, lattice-like protrusions are formed alternately and continuously.

[0018] The conveying section 20 is composed of conveying rolls 21 arranged at predetermined intervals along one direction D. In this embodiment, the steel sheet 10 is conveyed in the one direction D by each of the conveying rolls 21 rotating clockwise.

[0019] The finishing mill 30 has a pair of work rolls 31a, 31b arranged to face each other. The pairs of work rolls 31a, 31b are arranged at a predetermined interval in one direction D. Each of the pair of work rolls 31a, 31b is arranged at an interval in the vertical direction.

[0020] The pair of work rolls 31a, 31b is supported by a pair of backup rolls 31c, 31d. A plurality of pairs of backup rolls 31c, 31d are arranged at predetermined intervals in one direction D. The steel sheet 10 passes between the pair of work rolls 31a, 31b, and thereby has a thickness of, for example, about several mm.

[0021] The run-out table 40 sprays water towards the steel plate 10 to cool the steel plate 10. The run-out table 40 has a plurality of first cooling water nozzles 41 that spray cooling water onto the surface of the steel plate 10. For example, a full cone spray nozzle can be used as the first cooling water nozzle 41. A plurality of first cooling water nozzles 41 are arranged in the width direction of the steel plate 10. Furthermore, a plurality of first cooling water nozzles 41 are arranged in the conveying direction D of the steel plate 10.

[0022] The run-out table 40 has a plurality of second cooling water nozzles 42 that spray cooling water onto the back surface of the steel plate 10. For example, full cone spray nozzles can be used as the second cooling water nozzles 42. The second cooling water nozzles 42 can be arranged in the same manner as the first cooling water nozzles 41. Note that for the first cooling water nozzles 41 and the second cooling water nozzles 42, various nozzles such as pipe laminar nozzles can be used instead of full cone spray nozzles.

[0023] The air ejection unit 50 is provided downstream of the run-out table 40 in the one direction D. The air ejection unit 50 has a nozzle 51 that ejects air and an adjustment valve (not shown) that adjusts the pressure of the air supplied to the nozzle 51. The air ejection unit 50 ejects air toward the steel plate 10, for example, from a direction perpendicular to the one direction D. There is no particular limitation on the number of air ejection units 50, as long as one or more are provided in the one direction D. It is preferable that the nozzle 51 is provided so that the air ejection direction can be adjusted.

[0024] The measuring unit 60 emits, for example, laser light as emitted light and measures the shape of the object using the light diffused and reflected by the object. A sensor using a light cutting method can be used as the measuring unit 60.

[0025] The winding device 70 has rollers 71 that wind, at a predetermined winding temperature, the steel sheet 10 that has been cooled by the run-out table 40 and from which moisture on the surface has been removed by the air ejection section 50. The steel sheet 10 that has been wound into a coil by the winding device 70 is transported from the steel sheet manufacturing apparatus 100 to a predetermined position.

[0026] Fig. 2 is an explanatory diagram showing the relationship between the air discharged from the air discharge unit 50 and the steel plate 10. As shown in Fig. 2, the steel plate 10 has an uneven surface 11 in which convex portions are arranged in the width direction W of the steel plate 10 when viewed from the front.

[0027] The air ejection section 50 is provided at a position higher than the steel plate 10 in the thickness direction T of the steel plate 10. The air ejection section 50 is provided so as to eject air across the width direction W of the steel plate 10. By providing the air ejection section 50 in this manner, the air ejection section 50 can eject air uniformly onto the uneven surface 11. Note that the dashed dotted line in the figure shows the state of the air ejected from the nozzle 51.

[0028] The range over which air is ejected from the air ejection section 50 can be set, for example, by adjusting the diffusion range of the air ejected from the nozzle 51 and the angle that the axial direction of the nozzle 51 makes with respect to the steel plate 10.

[0029] 3 is an explanatory diagram showing how the shape of the steel sheet 10 is measured by the measurement unit 60. The measurement unit 60 has an emission unit 61 that emits laser light as emitted light EL, and a light receiving unit 62 that receives reflected light RL that is the emitted light reflected by an object.

[0030] The measurement unit 60 is communicatively connected to a control unit 80 that controls the entire steel plate manufacturing apparatus 100. The control unit 80 is a computer comprising a CPU, ROM, and RAM. The control unit 80 generates image data based on the data acquired from the measurement unit 60. The control unit 80 calculates the dimensions of the steel plate 10 based on the generated image data.

[0031] The control unit 80 is communicatively connected to the display unit 90. The display unit 90 is, for example, a liquid crystal display. The control unit 80 causes the display unit 90 to display the generated image data and the calculated dimensions of the steel plate 10.

[0032] 4 shows a process flow of the moisture removal method. As shown in FIG. 4, the process flow of the moisture removal method is executed, for example, when the operation of the transport unit 20 is used as a trigger.

[0033] Upon receiving an operation command from the control unit 80, the transport unit 20 starts operation and transports the steel sheet 10 rolled by the roughing mill in one direction D (step S01). In the transport process of step S01, once the steel sheet 10 is transported, the steel sheet 10 is first rolled in the finishing rolling mill 30.

[0034] After the steel sheet 10 has been rolled by the finishing mill 30, the run-out table 40 sprays water onto the steel sheet 10 to cool the steel sheet 10 (step S02). As a result, the steel sheet 10 is cooled to a predetermined temperature.

[0035] After the cooling step of step S02 is performed, the air ejection unit 50 ejects air toward the steel sheet 10 (step S03). The air ejection step of step S03 removes moisture adhering to the surface of the steel sheet 10.

[0036] After the air injection process in step S03 is performed, image data indicating the shape and dimensions of the steel sheet 10 are calculated by the measuring unit 60, and the image data and dimensions are displayed on the display unit 90 (step S04). A user can determine whether the steel sheet 10 is in an appropriate condition by visually checking the image data and dimensions on the display unit 90. The steel sheet 10 that has passed the measuring unit 60 is wound into a coil by the winding device 70 and then moved to a predetermined storage location.

[0037] Fig. 5 shows the state of the air blowing step in step S03 in Fig. 4. As shown in Fig. 5, in the air blowing step in step S03, air is blown out so as to resist the movement of the moisture WT in one direction D. Specifically, the air blowing unit 50 blows out air so as to include a component that acts as a headwind against the movement direction of the steel sheet 10. The dashed line in the figure shows the state of the air blown out from the air blowing unit 50.

[0038] The force of the air that resists the movement of the water WT discharged from the air discharge section 50 is greater than the inertial force that moves the water WT in the first direction D. By discharging air from the air discharge section 50 in this manner, it is possible to prevent the water WT from moving downstream in the first direction D from the position where the air is blown. In other words, it is possible to cause the water WT to remain at the position where the air is blown. By causing the water WT to remain on the steel sheet 10, it is possible to prevent the water WT from scattering to other areas of the steel sheet 10 and re-adhering thereto. The air discharged from the air discharge section 50 is preferably adjusted to a pressure that causes the water WT to remain therein by an adjustment valve that adjusts the air pressure.

[0039] It should be noted that the air ejection process in step S03 is not limited to this type of air ejection mode, and air may be ejected so as to blow away the moisture WT from the steel sheet 10, for example.

[0040] As described above, the moisture removal device of the present invention is provided downstream of the run-out table 40 that cools the steel sheet 10 in one direction D in which the steel sheet 10 is transported, and has an air ejection unit 50 that ejects air toward the steel sheet 10. This makes it possible to remove moisture adhering to the surface of the steel sheet 10 on which protrusions and grooves are formed. Therefore, even when the shape of the steel sheet 10 is measured using a laser, it is possible to suppress a decrease in the measurement accuracy.

[0041] Furthermore, since the measuring device of the present invention is configured to include the moisture removal device, it is possible to improve the accuracy of measuring the shape of the steel plate.

[0042] Furthermore, since the steel plate manufacturing apparatus 100 of the present invention is configured to include the moisture removal device, it is possible to improve the accuracy of measuring the shape of the steel plate 10 manufactured by the manufacturing apparatus.

[0043] Furthermore, the moisture removal method of the present invention includes an air ejection step of ejecting air toward the steel sheet 10, which makes it possible to remove moisture adhering to the surface of the steel sheet 10. Therefore, even when shape measurement is performed using a laser, it is possible to suppress a decrease in measurement accuracy.

[0044] In the above-described embodiment, the air ejection unit 50 is used as the removing means for removing moisture from the steel sheet 10. In addition to the air ejection unit 50, the removing means for removing moisture from the steel sheet 10 may also be provided with a draining unit that ejects moisture to remove moisture from the steel sheet 10.

[0045] FIG. 6 shows the configuration of the draining section 53. As shown in FIG. 6, the draining section 53 is provided upstream of the air ejection section 50 in one direction D. The draining section 53 has a water ejection nozzle 54 that ejects water toward the steel sheet 10. In this embodiment, the water ejection nozzle 54 ejects water in a direction opposite to the one direction D. By ejecting water in this manner, it is possible to remove water adhering to the surface of the steel sheet 10 and reduce the amount of adhering water. Thereafter, the air ejection section 50 removes the water adhering to the surface of the steel sheet 10, thereby enhancing the moisture removal effect. Note that one or more draining sections 53 may be provided in the one direction D, and the number thereof is not particularly limited. Furthermore, it is preferable that the water ejection nozzle 54 be provided so that the direction of water ejection is adjustable. [Explanation of symbols]

[0046] 100 Steel plate manufacturing equipment 10 steel plate 20 Conveying section 40 Runout Table 50 Air outlet 60 Measurement section

Claims

1. A moisture removal device for removing moisture adhering to a surface of a steel plate having an uneven surface, a conveying section that conveys the steel plate in one direction; a run-out table that sprays water toward the steel plate to cool the steel plate; an air ejection unit that is provided downstream of the run-out table in the one direction and ejects air toward the steel plate; an adjusting unit that adjusts the pressure of the air discharged from the discharge unit, The adjusting unit adjusts the pressure of the air to a pressure that causes the moisture to remain at a position where the air ejected from the air ejection unit is blown.

2. The moisture removal device according to claim 1 , wherein the air ejection unit ejects the air across the width of the steel plate.

3. The moisture removal device according to claim 1 or 2, wherein the air ejection section is provided at a position higher than the steel plate in a thickness direction of the steel plate.

4. The moisture removal device according to claim 1 or 2; a measuring unit that measures the shape of the steel plate; A measuring device having:

5. A steel plate manufacturing apparatus comprising the moisture removal device according to claim 1 or 2.

6. A moisture removal method for removing moisture adhering to a surface of a steel plate having an uneven surface, comprising: a conveying step of conveying the steel plate in one direction; a cooling step of spraying water onto the steel plate; an air ejection step of ejecting air toward the steel plate; and In the air injection step, the air is blown out so as to resist the movement of the moisture in the one direction and to cause the moisture to remain at a position where the air is blown, A moisture removal method, wherein the force of the air resisting the movement of the moisture is greater than the inertial force causing the moisture to move in the one direction.

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