Draining device

Abstract

To improve efficiency of draining work of a roll surface after grinding.SOLUTION: A draining device 20 according to the present invention is provided in a roll grinding device 10 which grinds a roll R installed on a rotary base with a rotary grindstone 5, and is provided so as to be movable from one end side to the other end side of a roll R by a movement device 2 of the roll grinding device 10 that moves the rotary grindstone 5 with respect to the roll R. The draining device 20 includes an air nozzle (21, 22) that has a long air discharge part 21a (22a) and blows curtain-shaped compressed air to the rotating roll surface. Regarding the air nozzle (21, 22), the first air nozzle 21 and the second air nozzle 22 are arranged side by side in the travel direction from one end side to the other end side of the roll. The first air nozzle 21 which is located at the beginning of the travel direction is arranged so as to be inclined toward the roll end in the travel direction.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a dewatering technique for removing water and the like that adheres to the surface of a roll during surface grinding. [Background technology]

[0002] Since the surface of the roll affects the quality of the rolled object or the transported object, the surface is inspected and ground to remove irregularities and defects. During or after roll grinding, grinding water (grinding fluid) adheres to the roll surface, so it is necessary to remove the grinding water from the roll surface when checking the grinding state and defects. For example, as described in Patent Documents 1 and 2, there are techniques for removing the grinding water from the roll surface, such as pressing a water-repelling plate against the roll surface or blowing air onto the roll surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 11-237369 [Patent Document 2] Japanese Utility Model Application Publication No. 4-104201 Summary of the Invention [Problem to be solved by the invention]

[0004] If water (water film) remains on the roll surface after grinding, it can leave water marks when it dries, cause rust, or attract dust, etc. If water marks, rust, or adhesions are present on the roll surface, for example, the water marks can be transferred to the surface of the rolled steel material, or scratches can occur due to rust or dust, greatly affecting the quality.

[0005] For this reason, it is important to perform a draining operation on the roll surface after grinding, but as described in the patent document, conventional draining devices often perform insufficient draining. If the draining performance is insufficient, the draining operation must be performed multiple times, which reduces the work efficiency.

[0006] Furthermore, since it is difficult to make draining work more efficient with conventional draining devices, there are cases where workers directly drain the water from the roll surface after using the draining device, or without using the draining device, and this makes it necessary to ensure safety for the rotating roll surface.

[0007] On the other hand, when workers perform the draining work, for example, they may press a draining tool such as a rubber spatula against the roll surface to remove the water, but depending on the worker's level of skill, the worker may not be able to drain the water reliably, and even in this case, there may be cases where the draining work needs to be done multiple times, posing issues in terms of work efficiency.

[0008] An object of the present invention is to provide a water draining device capable of reliably draining water from the roll surface after grinding, and to enable the water draining operation on the roll surface to be performed safely and efficiently. [Means for solving the problem]

[0009] (1) The water draining device of the present invention is provided in a roll grinding machine that grinds a roll mounted on a rotating table with a rotary grindstone, and is movable from one end of the roll to the other end by a moving device of the roll grinding machine that moves the rotary grindstone relative to the roll. The water draining device has a long air discharge part and an air nozzle that sprays a curtain of compressed air onto the surface of the rotating roll. Where: In the direction of travel from one end of the roll to the other end, the first air nozzle and the second air nozzle each Arranged side by side Wait , the first air nozzle located at the front in the direction of travel Longitudinal direction is arranged at an angle toward the end of the roll in the traveling direction. At the same time, the first air nozzle is inclined so that the rear end side of the first air nozzle in the traveling direction is positioned lower than the front end side. .

[0010] (2) In the above (1), the second air nozzle Longitudinal direction The first air nozzle may be disposed so as to be positioned horizontally with respect to the traveling direction. In the traveling direction, the rear end of the air discharge portion of the first air nozzle is disposed so as to be positioned horizontally with respect to the traveling direction. Discharge The nozzles are located below the front end of the nozzle section and are arranged so that the curtain-like compressed air ejection areas partially overlap each other.

[0011] (3) In the above (1), both the first air nozzle and the second air nozzle Each longitudinal direction are arranged inclined toward the end of the roll in the traveling direction, The first air nozzle and the second air nozzle are inclined so that their rear ends are positioned lower than their front ends in the traveling direction. The present invention can be configured to:

[0012] (4) In the above (3), the air of the second air nozzle Discharge The front end of the air outlet portion may be configured to be spaced apart from the rear end of the air outlet portion of the first air nozzle.

[0013] (5) In the above (1), the first air nozzle Longitudinal direction The inclination angle of the vehicle with respect to the direction of travel may be between 40 degrees and 55 degrees.

[0014] (6) In the above (3), the first air nozzle and the second air nozzle In the longitudinal direction Each inclination angle may be greater than or equal to 40 degrees and less than or equal to 55 degrees relative to the direction of travel.

[0015] (7) In (1) above, the air discharge portion of the first air nozzle can be configured so that the discharge angle based on a direction perpendicular to the roll surface is from 1 degree to 15 degrees, and the compressed air ejected from the first air nozzle can be configured to be blown obliquely onto the roll surface.

[0016] (8) In the above item (1), the clearance between the air discharge portion of the first air nozzle and the roll surface in a direction perpendicular to the roll surface can be configured to be 1 mm or more and 5 mm or less.

[0017] (9) In the above (1), the draining device may include a compressed air supply mechanism that supplies compressed air to the first air nozzle and the second air nozzle. The compressed air supply mechanism may include an air compressor, a first flow path that branches off from a supply path of the air compressor and is connected to the first air nozzle, a second flow path that branches off from the supply path and is connected to the second air nozzle, and valves provided in each of the first flow path and the second flow path. The amount of compressed air supplied to the first air nozzle may be configured to be greater than the amount of compressed air supplied to the second air nozzle.

[0018] (10) In the above (9), the valve may be an electromagnetic valve, and the compressed air supply mechanism may be configured to include a flow rate control unit that adjusts the opening degree of the electromagnetic valve. Here, the flow rate control unit may be configured to control the electromagnetic valve to supply the compressed air that was being supplied to the first air nozzle to the subsequent second air nozzle after the first air nozzle passes the other end of the roll in the traveling direction, thereby increasing the amount of compressed air ejected from the second air nozzle when the second air nozzle passes the other end of the roll. Effect of the Invention

[0019] The present invention makes it possible to reliably complete the draining of water from the roll surface simply by moving the draining device from one end of the rotating roll to the other end, thereby enabling the draining work on the roll surface to be performed safely and efficiently. [Brief description of the drawings]

[0020] [Figure 1] 1 is a configuration diagram of a roll grinding machine to which a water draining device according to a first embodiment is applied. [Diagram 2] FIG. 2 is a diagram for explaining a roll surface inspection device mounted on the roll grinding device of the first embodiment. [Diagram 3] FIG. 2 is a diagram for explaining each component of the water draining device of the first embodiment and the positional relationship between the rolls. [Figure 4]1 is a configuration diagram of a draining device according to a first embodiment. FIG. [Diagram 5] 5A to 5C are diagrams for explaining the water draining operation by the first air nozzle and the second air nozzle of the first embodiment. [Figure 6] 4 is a flowchart of a roll grinding method including a water draining operation and a roll surface inspection according to the first embodiment. [Figure 7] FIG. 4 is a diagram for explaining flow rate control at roll ends of a first air nozzle and a second air nozzle in the first embodiment. [Figure 8] 6 is a flowchart of a water removing operation to which roll end flow rate control of the first air nozzle and the second air nozzle of the first embodiment is applied. [Figure 9] FIG. 4 is a diagram showing a first modified example of the drainer according to the first embodiment. [Figure 10] FIG. 4 is a diagram for explaining the inclination angle of the first air nozzle in the first embodiment. BEST MODE FOR CARRYING OUT THEINVENTION

[0021] Hereinafter, an embodiment will be described with reference to the drawings.

[0022] (First embodiment) 1 to 9 are diagrams for explaining a roll grinding device with a draining device according to the first embodiment. The rolls can include steel mill rolls and papermaking rolls, and the shape of the roll is not particularly important, and the device can be used for roll surface inspection, grinding, and draining.

[0023] In each drawing, the X direction is the longitudinal direction of the roll R (the axial direction of the roll R), the Y direction is the width direction of the roll R perpendicular to the longitudinal direction of the roll R, and the Z direction is the height direction of the roll grinding apparatus 10. The X direction, the Y direction, and the Z direction are perpendicular to each other.

[0024] <Structure of roll grinding equipment> 1 is a configuration diagram of a roll grinding apparatus 10. The roll grinding apparatus 10 of this embodiment is configured to include a water draining device 20 and a roll surface inspection device 100. A detailed description of the water draining device 20 will be given later.

[0025] In the roll grinding apparatus 10 of this embodiment, a roll rotation drive device 1 is provided on a base 8, and a roll R to be ground (subject to inspection) is placed between the roll rotation drive device 1 and the rotary support 1a as a support. The roll R is placed between the roll rotation drive device 1 and the rotary support 1a so that its longitudinal direction (axial direction) is parallel to the base 8.

[0026] A first moving device 2 capable of reciprocating left and right in the longitudinal direction of the roll R is provided on the base 8. A second moving device 3 capable of advancing and retreating in a direction (Y direction) perpendicular to the axial direction of the roll R is provided on the first moving device 2. This allows the rotary grindstone 5, which comes into contact with the surface of the roll R to grind it, to move along the longitudinal direction of the roll R, and can advance and retreat relative to the surface of the roll R.

[0027] The rotary grindstone 5 is a disk-shaped grindstone having a grindstone surface of a predetermined width, and is rotationally driven by a rotary grindstone drive device 4. In addition, the rotary grindstone 5 is provided with a cover member 6, which covers at least a portion of the rotary grindstone 5, leaving only a portion including the grindstone surface.

[0028] The first moving device 2 moves the rotary grindstone 5 to the axial end of the roll R mounted on the roll rotation drive device 1, and the second moving device 3 moves it closer to the roll R so that the grinding surface of the rotary grindstone 5 comes into contact with the surface of the roll R. The roll rotation drive device 1 and the rotary grindstone drive device 4 then drive and rotate the roll R and the rotary grindstone 5, respectively, to grind the surface of the roll R. During grinding, a grinding fluid such as water is supplied to the contact area between the roll R and the rotary grindstone 5.

[0029] The roll grinding apparatus 10 is an NC processing machine controlled by a roll grinding control device 7, which controls the drive of the roll rotation drive device 1, the first moving device 2, the second moving device 3, and the rotary grindstone drive device 4. The roll grinding control device 7 controls the rotational speed of the roll R and the rotational speed of the rotary grindstone 5 to control the grinding speed, and also moves the second moving device 3 forward and backward relative to the surface of the roll R to variably control the relative position between the grinding surface of the rotary grindstone 5 and the surface of the roll R. Note that a known grinding device can be applied to the roll grinding apparatus 10 of this embodiment.

[0030] A roll surface inspection device 100 is attached to the roll grinding device 10. The roll surface inspection device 100 will be described in detail with reference to Figs.

[0031] The roll surface inspection apparatus 100 includes a camera 110, an illumination device 120, and a roll surface inspection device 130, and the camera 110 and the illumination device 120 are unitized and attached to the roll grinding apparatus 10. The roll surface inspection apparatus 100 is controlled by a roll surface inspection control device 130.

[0032] 1 and 2, a pillar member 101 is fixed to a cover member 6 of a grinding wheel 5 and extends in the vertical direction. An attachment member 102 is provided at the end of the pillar member 101, and extends from the pillar member 101 above the roll R. The attachment member 102 is provided with an inspection unit attachment section 103 to which a camera 110 and a lighting device 120 are attached, and the camera 110 and the lighting device 120 are attached as an inspection unit above the roll R, facing the roll R located below the inspection unit attachment section 103.

[0033] The inspection unit is arranged to be movable in the axial direction and in a direction perpendicular to the axial direction together with the movement of the rotary grinding wheel 5 by a moving device (first moving device 2 and second moving device 3) of the roll grinding device 10 that moves the rotary grinding wheel 5 to the roll R.

[0034] 1, the camera 110 is disposed on an extension line of the rotary grindstone 5 in a direction perpendicular to the axial direction of the roll R, and captures an image of the surface of the rotating roll R. That is, the camera 110 is installed at a position where the surface (circumferential surface) in contact with the rotary grindstone 5 continuously enters the capture range by the rotating roll R, and the capture range becomes an image capture region of a predetermined size that includes the surface in contact with the rotary grindstone 5. In addition, the lens 111 of the camera 110 is disposed so as to face the central axis of the roll R (center of the rotation axis).

[0035] The lighting device 120 illuminates the roll surface including the shooting range of the camera 110. For example, it can be configured with an LED lighting device. As shown in FIG. 2, the lighting device 120 is fixedly disposed in a positional relationship with the lens 111 facing the central axis of the roll R so as to illuminate the shooting range.

[0036] <Configuration of the water draining device 20> Fig. 3 is a diagram for explaining the configuration of the water draining device 20 and its positional relationship with the roll R. Fig. 4 is a diagram showing the configuration of the water draining device 20 of this embodiment. The water draining device 20 is a device for removing water and the like (water, grinding fluid, etc.) remaining on the surface of the roll R after grinding from the surface of the roll R by using compressed air.

[0037] In the water draining device 20, a first air nozzle 21 and a second air nozzle 22 are fixed to a plate-shaped nozzle mounting member 23, and an arm 24 is connected to the nozzle mounting member 23. An arm advancing / retracting device 25 is connected to the arm 24, and by advancing and retracting the arm 24, the first air nozzle 21 and the second air nozzle 22 advance and retract in a direction perpendicular to the axial direction of the roll R (the surface of the roll R).

[0038] The water draining device 20 can be mounted on the first moving device 2 of the roll grinding device 10, and is provided ahead of the roll surface inspection device 100 in the traveling direction from one end of the roll R to the other end (see Figure 1).

[0039] The water draining device 20 of this embodiment is provided so as to be movable from one end side to the other end side of the roll R by a first moving device 2 of the roll grinding device 10 which moves the rotary grindstone 5 relative to the roll R. In the front view of Fig. 3, the water draining device 20 performs a water draining operation on the surface of the roll R while moving from one end to the other end of the rotating roll R. Hereinafter, the direction from one end to the other end of the roll R (the axial direction of the roll R) is the traveling direction of the water draining device 20.

[0040] 4, the first air nozzle 21 and the second air nozzle 22 are air nozzles of the same configuration, and as shown in FIG. 4, are provided with long air discharge parts 21a, 22a, respectively, and eject a curtain of compressed air onto the surface of the rotating roll R. The discharge surfaces of the air discharge parts 21a, 22a face the surface of the roll R and are disposed at a predetermined distance (clearance c) from the surface of the roll R.

[0041] In the water draining device 20 of this embodiment, two air nozzles are used, and the first air nozzle 21 and the second air nozzle 22 are arranged side by side in the traveling direction in this order. At this time, the first air nozzle 21 located at the front in the traveling direction is arranged at an incline toward the end (other end) of the roll R, which is the terminal end in the traveling direction. In other words, the first air nozzle 21 is arranged with the rear end side of the first air nozzle 21 positioned downward with respect to the traveling direction so that water, etc. on the surface of the roll R is driven diagonally downward toward the terminal end in the traveling direction. The first air nozzle 21 is inclined downward at an angle α with respect to the traveling direction.

[0042] On the other hand, the second air nozzle 22 is Discharge The air nozzle 21 is disposed so that the longitudinal direction of the air outlet 22a is horizontal. In the traveling direction, the rear end of the air outlet 21a of the first air nozzle 21 is aligned with the rear end of the air outlet 21a of the second air nozzle 22. Discharge The nozzles 22a and 22b are located below the front end of the nozzle 22 and are arranged so that the areas where the curtains of compressed air are ejected overlap each other.

[0043] Moreover, the first air nozzle 21 and the second air nozzle 22 are disposed so as to be located below the rotation axis of the roll R, and the air outlet 22a of the subsequent second air nozzle 22 is located parallel to and below the rotation axis of the roll R. The roll R rotates from bottom to top in the front view of Fig. 3, and the surface of the roll R faces downward below the rotation axis. With this configuration, water can be efficiently removed by blowing compressed air from the first air nozzle 21 and the second air nozzle 22.

[0044] Furthermore, as a device for efficiently draining water while driving water and the like on the surface of the roll R diagonally downward, as shown in a top view of FIG. 3, the air discharge section 21a of the first air nozzle 21 can be configured to blow compressed air obliquely onto the surface of the roll R, rather than blowing compressed air perpendicular to the surface of the roll R when a direction perpendicular to the surface of the roll R is taken as a reference. The air discharge section 21a of the first air nozzle 21 blows compressed air obliquely at a discharge angle β based on a direction perpendicular to the roll surface (Y direction). The air discharge section 22a of the second air nozzle 22 can be configured to blow compressed air perpendicular to the surface of the roll R, or at a discharge angle β1 downward from the perpendicular direction. The discharge angle β1 can be any angle, but may be, for example, a discharge angle inclined obliquely downward by several degrees from the perpendicular direction to the surface of the roll R.

[0045] In the first air nozzle 21 and the second air nozzle 22, the air discharge portions 21a, 22a are formed in an elongated shape with a length d, and discharge compressed air of at least the length d. A flat air nozzle or a curtain-type air nozzle can be applied to the first air nozzle 21 and the second air nozzle 22. The air discharge portions 21a, 22a can have, for example, a structure in which a plurality of discharge holes are formed within the length d, or a structure in which an elongated discharge slit is formed.

[0046] The length in the longitudinal direction of the compressed air blown out from the air discharge parts 21a, 22a can be configured so that a curtain-like compressed air having at least a length d contacts the surface of the roll R. In other words, the compressed air blown out from the discharge surfaces of the air discharge parts 21a, 22a may be configured to spread in the longitudinal direction longer than the length d and contact the surface of the roll R.

[0047] Next, a description will be given of a compressed air supply mechanism that supplies compressed air to the first air nozzle 21 and the second air nozzle 22. The compressed air supply mechanism includes an air compressor 9, a first flow path r1 that branches off from a supply path r of the air compressor 9 and is connected to the first air nozzle 21, a second flow path r2 that branches off from the supply path r and is connected to the second air nozzle 22, and valves V1 and V2 that are provided in the first flow path r1 and the second flow path r2, respectively. In addition, flow meters F1 and F2 are provided in the first flow path r1 and the second flow path r2.

[0048] The air compressor 9 supplies a constant amount of compressed air to the supply path r. The sum of the flow rate of compressed air flowing through the first flow path r1 and the flow rate of compressed air flowing through the second flow path r2 is the flow rate supplied from the air compressor 9 to the supply path r. For example, when the flow rate to the first air nozzle 21 is increased, the flow rate of compressed air supplied to the second air nozzle 22 decreases by the amount increased to the first air nozzle 21.

[0049] In this embodiment, the amount of compressed air supplied to the first air nozzle 21 is set to be greater than the amount of compressed air supplied to the second air nozzle 22. The flow rate of the compressed air can be adjusted by valves V1 and V2. The valves V1 and V2 are, for example, solenoid valves.

[0050] The draining operation control of the draining device 20 and the flow rate control of compressed air of the compressed air supply mechanism are performed by a draining control device 7A. The draining control device 7A can be configured to be included in the roll grinding control device 7 as shown in FIG. 1, for example, or can be configured as a control device independent of the roll grinding control device 7 and configured to cooperate with the roll grinding control device 7.

[0051] Further, a sensor 23a is disposed on the nozzle attachment member 23 facing the surface of the roll R. A proximity sensor or a distance measuring sensor can be applied as the sensor 23a. The sensor 23a can detect the end of the roll R and measure the distance (clearance c) from the surface of the roll R, and the sensor information from the sensor 23a is output to the water draining control device 7A. Based on the sensor information from the sensor 23a, the water draining control device 7A can perform positioning control to the end of the roll R at the start of the water draining operation and end control of the water draining operation after reaching the other end of the roll R.

[0052] Although the compressed air supply mechanism has been described as being branched from one air compressor 9 to supply compressed air to both the first air nozzle 21 and the second air nozzle 22, the present invention is not limited to this. For example, the compressed air may be supplied to each of the first air nozzle 21 and the second air nozzle 22 from an independent air compressor.

[0053] FIG. 5 is a diagram for explaining the water draining operation by the first air nozzle 21 and the second air nozzle 22. As shown in FIG.

[0054] As shown in the right diagram of Figure 5, a thin water film remains on the surface of the roll R after grinding due to the surface tension of water, etc. The water film is thin at the top and thick at the bottom due to gravity on the surface of the roll R. The water film remaining on the surface of the roll R in this way is difficult to sufficiently remove due to the surface tension by simply blowing compressed air onto it.

[0055] The left diagram in Fig. 5 shows a state in which the roll R is rotating from bottom to top and the water draining device 20 moves to the right. The first air nozzle 21, which is inclined at an angle α, drives water and the like obliquely downward in the direction of travel onto the surface of the roll R and blows it off, thereby performing a water draining operation on the surface of the roll R rotating at a water draining pitch p.

[0056] At this time, a phenomenon occurs in which water, etc. escapes outwardly and rearward from the first air nozzle 21 moving to the right, or wraps around, at the rear end of the first air nozzle 21. The second air nozzle 22 is disposed at a position where compressed air can be blown inwardly in the traveling direction from the water cutting pitch p of the first air nozzle 21, and blows compressed air again to the area blown by the first air nozzle 21, including the water, etc. escaping outwardly and rearward from the first air nozzle 21.

[0057] In the water draining device 20 of this embodiment, the first air nozzle 21 is disposed at an angle toward the end of the roll R in the traveling direction, and therefore water, etc. on the surface of the roll R is removed while being driven toward the end of the roll R. In other words, water, etc. on the surface of the roll R onto which compressed air is blown by the first air nozzle 21 is blown away or falls while moving diagonally downward in the traveling direction, so that a downward blowing force and a blowing force that drives in the traveling direction act together, making it easier for the water (water film) to peel off from the roll surface.

[0058] Then, part of the water (water film) driven diagonally downward in the traveling direction moves toward the rear end of the first air nozzle 21 arranged at an angle in the traveling direction, and part of it may go around the rear end of the first air nozzle 21 and remain on the surface of the roll R. Therefore, the subsequent second air nozzle 22 has the function of removing the remaining water that could not be removed by the first air nozzle 21, while blowing compressed air again onto the surface of the roll R that has been blown with the compressed air of the first air nozzle 21, thereby draining the water.

[0059] With this configuration, the surface of the roll R can be completely drained without fail by simply moving the roll R from one end to the other, reducing the need to perform the draining work manually or to move the draining device 20 back and forth multiple times, thereby improving the safety and work efficiency of the draining work.

[0060] <Roll grinding method including water draining operation> FIG. 6 is a flow chart of a method for roll grinding including a draining operation and roll surface inspection.

[0061] An operator sets the roll R in the roll grinding device 10, and operates the roll grinding control device 7 to move the rotary grinding wheel 5 to the grinding start position and bring the rotary grinding wheel 5 into contact with the surface of the roll R. The roll grinding control device 7 starts grinding based on control information such as the rotational speed of the roll R and the rotational speed of the rotary grinding wheel 5 input by the operator or input in advance (S101).

[0062] After grinding is completed, the surface of the roll R is inspected by the roll surface inspection device 100 (S103), but before the surface inspection, the roll R is rotated and a draining operation is performed by the draining device 20 (S102).

[0063] Specifically, the roll surface inspection control device 130 outputs surface inspection control information to the roll grinding control device 7, rotates the roll R at a predetermined rotational speed, and photographs the entire surface of the roll R while moving the roll surface inspection device 100 in the axial direction at a predetermined speed. The rotary grindstone 5 is separated from the surface of the roll R at a position where it does not come into contact with the surface of the roll R. In other words, the roll surface inspection control device 130 positions the roll surface inspection device 100 at one end of the roll R and, while moving it in the axial direction toward the other end, continuously photographs the area illuminated by the illumination device 120 on the surface of the rotating roll R with the camera 110.

[0064] The images captured by the camera 110 are continuously input to the roll surface inspection control device 130, which performs a surface inspection of the roll R. For example, the roll surface inspection control device 130 can detect flaws, dents, patterns, and the like contained in the captured images. The patterns are patterns on the roll surface that are generated by differences in the roll surface roughness caused by grinding, resulting in wavy patterns. The flaws, dents, patterns, and the like can be detected by applying known image processing techniques such as object recognition and object detection. With regard to the patterns, the boundaries between light and dark areas can be recognized, and the areas partitioned as patterns can be identified as "patterns."

[0065] When the roll surface inspection control device 130 determines that there are flaws, dents, patterns, etc. as a result of the detection process, it outputs the detection result to the roll grinding control device 7. Then, returning to step S101, the roll grinding control device 7 displaces the relative position between the rotating grindstone 5 and the surface of the roll R to grind the flaws, dents, patterns, etc. detected by the roll surface inspection device 100.

[0066] The grinding step in step S101, the water removal step in step S102, and the surface inspection step in step S103 are repeated until the surface inspection step in step S103 gives an "inspection OK" result.

[0067] If the result of the surface inspection in step S103 is "inspection OK", grinding is terminated (S104), and a draining operation is performed by the draining device 20 after the surface inspection (S105). The draining operations in steps S102 and S105 are the same, and involve the roll surface draining operation illustrated on the right side of FIG.

[0068] First, the water draining control device 7A controls the arm advancement / retraction device 25 to bring the arm 24 close to the surface of the roll R (S301). Next, the water draining control device 7A positions the first air nozzle 21 and the second air nozzle 22 at the end of the roll R while detecting the surface of the roll R with the sensor 23a (S302). The water draining control device 7A controls the first air nozzle 21 so that the front part in the traveling direction is located at the end of the roll R.

[0069] The draining control device 7A causes the first air nozzle 21 and the second air nozzle 22 to eject compressed air at a predetermined flow rate (S303). At this time, when the supply amount of compressed air from the air compressor 9 is 700 L / min, for example, the draining control device 7A can eject compressed air with the flow rate of the first air nozzle 21 set to 500 L / min and the flow rate of the second air nozzle 22 set to 200 L / min. Thereafter, the draining control device 7A outputs control information to the roll grinding control device 7, rotates the roll R at a predetermined rotational speed, and moves the draining device 20 in the axial direction at a predetermined speed (S304).

[0070] After the second air nozzle 22 of the water draining device 20, which is moving toward the other end of the roll R, passes the other end, the water draining control device 7A stops the supply of compressed air to the first air nozzle 21 and the second air nozzle 22 (S305). Thereafter, the water draining control device 7A controls the arm advancing / retreating device 25 to retract the arm 24 from the surface of the roll R (S306).

[0071] In the example of Fig. 6, step S102 of the water draining operation after grinding and step S103 of the roll surface inspection by the roll surface inspection device 100 are performed as separate processes, but they can be performed together (simultaneously). That is, as shown in Fig. 1, the water draining device 20 is provided ahead of the roll surface inspection device 100 in the traveling direction from one end of the roll R to the other end. For this reason, the water draining operation can be performed ahead of the roll surface inspection device 100, while the roll surface inspection can be performed following the water draining operation, thereby improving work efficiency.

[0072] Fig. 7 is a diagram for explaining the roll end flow rate control of the first air nozzle 21 and the second air nozzle 22. Fig. 8 is a flowchart of the water removing operation to which the roll end flow rate control of the first air nozzle 21 and the second air nozzle 22 is applied.

[0073] As shown in FIG. 7, at the end (other end) of the roll R in the traveling direction, water and the like that is driven diagonally downward in the traveling direction by the first air nozzle 21 may not be completely removed due to surface tension and may remain near the end as returning water.

[0074] Therefore, after the first air nozzle 21 passes the end of the roll R in the traveling direction, the flow rate of the compressed air can be controlled by increasing the discharge rate of the subsequent second air nozzle 22 to remove the return water that has accumulated at the end of the roll R in the traveling direction.

[0075] For example, the water draining control device 7A can be configured to include a flow control unit that adjusts the opening of valves V1 and V2, which are composed of solenoid valves. After the leading first air nozzle 21 passes the other end of the roll R in the traveling direction, the water draining control device 7A (flow control unit) controls valve V1 to be completely closed and valve V2 to be fully open, and supplies the compressed air that was being supplied to the first air nozzle 21 to the trailing second air nozzle 22. The amount of compressed air sprayed from the second air nozzle 22 when the second air nozzle 22 passes the other end of the roll R is increased, and water remaining near the other end of the roll R in the traveling direction is removed.

[0076] Fig. 8 shows the draining operation shown in Fig. 6 with the addition of steps S305A and S305B. After moving the draining device 20 in the axial direction at a predetermined speed in step S304, the draining control device 7A judges whether the first air nozzle 21 has passed the other end of the roll R (S305A). For example, the sensor 23a is installed above the horizontally disposed second air nozzle 22 and at a position corresponding to the rear end of the first air nozzle 21 in the traveling direction. Based on the sensor information of the sensor 23a, it can be determined whether the first air nozzle 21 has passed the other end of the roll R.

[0077] When the first air nozzle 21 has passed the other end of the roll R (YES in S305A), the water drainage control device 7A controls the opening of the valves V1 and V2 to increase the amount of compressed air ejected from the second air nozzle 22 (S305B). The second air nozzle 22 ejects compressed air at the full flow rate supplied from the air compressor 9 until it approaches and passes the other end of the roll R.

[0078] 9 is a diagram showing a first modified example of the draining device 20 of this embodiment. In this modified example, the second air nozzle 22 is also inclined toward the end in the traveling direction, like the first air nozzle 21. The inclination angle α1 of the second air nozzle 22 is the same as the inclination angle α of the first air nozzle 21.

[0079] In the modified example of Figure 9, as explained in Figure 5, even if water or the like escapes or wraps around to the rear outside from the rear end of the first air nozzle 21 moving to the right, it can be removed by being driven to the end of the roll R in the traveling direction by the inclined second air nozzle 22.

[0080] In addition, when both the first air nozzle 21 and the second air nozzle 22 are arranged inclined toward the end of the roll R in the traveling direction as in this modified example, as shown in FIG. Discharge The front end of the air outlet portion 22a of the first air nozzle 21 may be spaced apart from the rear end of the air outlet portion 21a of the first air nozzle 21. In the example of Fig. 9, the first air nozzle 21 and the second air nozzle 22 are arranged at an interval of a distance g, so that the areas where the curtain-like compressed air is ejected do not overlap each other. Even if the first air nozzle 21 and the second air nozzle 22 are arranged at a distance in this manner, the inclined second air nozzle 22 can reliably remove water and the like from the surface of the roll R by driving the air obliquely downward in the traveling direction, just like the first air nozzle 21.

[0081] In addition, in the water draining device 20 of this modified example, in the roll end flow rate control shown in Figures 7 and 8, the subsequent second air nozzle 22 can blow away the return water remaining near the end diagonally downward in the direction of travel, thereby efficiently removing it.

[0082] Furthermore, in the draining device 20 of this modification, the first air nozzle 21 and the second air nozzle 22 are arranged at an interval of a distance g. Therefore, when the flow rate is switched to the second air nozzle 22 in the roll end flow rate control, interference by the first air nozzle 21 can be reduced. For example, if the second air nozzle 22 is switched to increase the flow rate before the first air nozzle 21 passes the end of the roll R at the end in the traveling direction, the compressed air of both may interfere with each other, resulting in a decrease in draining performance. Therefore, the interval g provided between the first air nozzle 21 and the second air nozzle 22 can be used to gain time to switch the flow rate increase from the first air nozzle 21 to the second air nozzle 22 during movement in the traveling direction, and it is possible to control so that the compressed air does not interfere with each other.

[0083] The second air nozzle 22 of this modified example can be configured to blow compressed air onto the surface of the roll R at a discharge angle β similar to that of the first air nozzle 21.

[0084] (First Example) Fig. 10 is a diagram for explaining the inclination angle of the first air nozzle 21 of this embodiment. Table 1 shows the test results of an evaluation test in which the water-draining operation was performed with different inclination angles α of the first air nozzle 21. The inclination angle α is an angle when the traveling direction (axial direction of the roll R) is set to 0 degrees. [Table 1]

[0085] Table 1 shows the results of tests performed under the conditions of length d of air discharge portion 21a of first air nozzle 21 = 100 mm, compressed air flow rate = 700 L / min, clearance c (gap) = 4 mm, rotation speed of roll R = 25 rpm, moving speed in the forward direction (moving speed of first moving device 2 in the axial direction of roll R) = 1500 mm / min, and water draining operations were performed at different inclination angles α with a water film on the surface of roll R. The flow rate of compressed air from second air nozzle 22 was 0.

[0086] Then, the presence or absence of residual water on the surface of the roll R one minute after the end of the draining operation was visually confirmed, and the state of the surface of the roll R was evaluated.

[0087] The larger the inclination angle α, the smaller the water draining pitch p and the larger the remaining water width h. In other words, the larger the inclination angle α, the weaker the force that drives the water in the direction of travel and removes it from the surface of the roll R, resulting in residual water on the surface of the roll R. On the other hand, the smaller the inclination angle α, the larger the water draining pitch p and the smaller the remaining water width h, but this also weakens the force that drives the water film on the surface of the roll R diagonally downward in the direction of travel, resulting in residual water on the surface of the roll R after the water draining operation.

[0088] Furthermore, when the inclination angle α of the first air nozzle 21 was between 40 degrees and 55 degrees, a force acted appropriately to drive the water film on the surface of the roll R diagonally downward in the direction of travel, and there was almost no residual water on the surface of the roll R after the water draining operation.

[0089] In this way, the inclination angle α of the first air nozzle 21 (air discharge portion 21a) can be in the range of 40 degrees or more and 55 degrees or less with respect to the traveling direction. Note that both the first air nozzle 21 (air discharge portion 21a) and the second air nozzle 22 (air discharge portion 22a) of the first modified example shown in Fig. 9 can be configured so that the inclination angles α, α1 are in the range of 40 degrees or more and 55 degrees or less.

[0090] Next, Table 2 shows the test results of an evaluation test in which the draining operation was performed while varying the discharge angle β of the air discharge portion 21a of the first air nozzle 21 shown in the top view of FIG. [Table 2]

[0091] The discharge angle β is the angle at which compressed air is sprayed obliquely relative to the surface of the roll R, with the direction perpendicular to the surface of the roll R being 0 degrees and the direction horizontal to the surface of the roll R being 90 degrees, based on the direction perpendicular to the surface of the roll R.

[0092] Also, in Table 2, tests were performed under the conditions of length d of air discharge portion 21a of first air nozzle 21 = 100 mm, compressed air flow rate = 700 L / min, clearance c (gap) = 4 mm, inclination angle α = 45 degrees, rotation speed of roll R = 25 rpm, moving speed in the advancing direction (moving speed of first moving device 2 in the axial direction of roll R) = 1500 mm / min, and water draining operations were performed with different discharge angles β with a water film on the surface of roll R. The compressed air flow rate of second air nozzle 22 was 0.

[0093] Then, the presence or absence of residual water on the surface of the roll R one minute after the end of the draining operation was visually confirmed, and the state of the surface of the roll R was evaluated.

[0094] The larger the discharge angle β, the longer the distance between the surface of the roll R and the air discharge section 21a, in other words, the distance it takes for the compressed air ejected from the air discharge section 21a to reach the surface of the roll R. Therefore, when the discharge angle β was 20 degrees, there was residual water, and when the discharge angle β exceeded 60 degrees, it was difficult to blow away the water on the surface of the roll R.

[0095] On the other hand, when the discharge angle β is small, the distance that the compressed air ejected from the air discharge section 21a travels to reach the surface of the roll R is short, and the compressed air is blown at an acute angle obliquely against the surface of the roll R, so that the water is blown away efficiently and almost no water remains.

[0096] It was found that a reliable water draining operation can be performed by configuring the air discharge angle β of the air discharge portion 21a of the first air nozzle 21, based on the direction perpendicular to the surface of the roll R, to be in the range of 1 degree to 15 degrees, and by configuring the compressed air ejected from the first air nozzle 21 to be blown obliquely onto the surface of the roll R.

[0097] In addition, when the discharge angle β was 0 degrees, that is, when compressed air was blown perpendicular to the surface of the roll R, the water could be blown away efficiently and there was not much water remaining on the surface of the roll R. However, when the discharge angle was 1 degree or more, the water could be removed more efficiently, so it is preferable to set the discharge angle β in the range of 1 degree or more to 15 degrees or less.

[0098] Next, Table 3 shows the test results of an evaluation test in which the water draining operation was performed with different clearances c (gap) between the air discharge portion 21a of the first air nozzle 21 and the surface of the roll R, as shown in the side view of Figure 3. [Table 3]

[0099] The clearance c is a gap in a direction perpendicular to the surface of the roll R, and the smaller the clearance c, the stronger the force of the compressed air blown onto the surface of the roll R. As shown in the side view of Fig. 3, the clearance c is the minimum gap between the surface of the roll R and the air discharge portion 21a of the first air nozzle 21, and the first air nozzle 21 becomes more separated from the peripheral surface of the roll R as it moves toward the rear end in the traveling direction. For this reason, the clearance c is defined as the distance between the air discharge portion 21a at the portion closest to the rotation axis of the roll R and the surface of the roll R.

[0100] Also, in Table 3, tests were performed under the conditions of length d of air discharge portion 21a of first air nozzle 21 = 100 mm, compressed air flow rate = 700 L / min, inclination angle α = 45 degrees, rotation speed of roll R = 25 rpm, moving speed in the forward direction (moving speed of first moving device 2 in the axial direction of roll R) = 1500 mm / min, and water draining operations were performed with different clearances c with a water film on the surface of roll R. The compressed air flow rate of second air nozzle 22 was 0.

[0101] Then, the presence or absence of residual water on the surface of the roll R one minute after the end of the draining operation was visually confirmed, and the state of the surface of the roll R was evaluated.

[0102] When the clearance c exceeded 6 mm, residual water resulted, making it difficult to blow off the water on the surface of the roll R. On the other hand, when the clearance c was 5 mm or less, the water was blown off efficiently and there was almost no residual water.

[0103] It was found that reliable draining operation can be performed by setting the clearance c between the air discharge portion 21a of the first air nozzle 21 and the surface of the roll R in the direction perpendicular to the roll surface to be in the range of 1 mm or more and 5 mm or less.

[0104] The present embodiment has been described above, but in addition to the aspect in which the roll surface inspection control device 130 of the roll surface inspection device 100 is configured separately from the roll grinding control device 7, the roll grinding control device 7 and the roll surface inspection control device 130 can be configured integrally, for example, so that the control device of the roll surface inspection device 100 is included as a function of the roll grinding control device 7. The same applies to the water drainage control device 7A.

[0105] Furthermore, the water draining device 20 and roll surface inspection device 100 of this embodiment can be retrofitted to the roll grinding device 10, and can also be provided as separate water draining devices 20 and roll surface inspection devices 100 for existing roll grinding devices 10.

[0106] Furthermore, the roll surface inspection process during grinding in this embodiment can be performed during grinding processes such as medium grinding and finish grinding. The grinding process in the roll grinding device 10 can be mainly divided into rough grinding, medium grinding, and finish grinding, and in rough grinding, only grinding can be performed without performing the roll surface inspection process. In this way, the roll surface inspection process during grinding can be applied according to the grinding situation and purpose. Furthermore, before the roll surface inspection, a water draining process is always performed by the water draining device 20. [Explanation of symbols]

[0107] 1 Roll rotation drive device 1a Rotating stand 2 First moving device 3 Second moving device 4. Rotating grindstone drive unit 5. Rotating grindstone 6 Cover material 7 Roll grinding control device 7A Drain control device 8 Base 9. Air Compressor 10 Roll grinding equipment 20 Draining device 21 First air nozzle 22 No. 2 air nozzle 21a, 22a Air outlet 23 Nozzle mounting member 23a Sensor 24 Arm 25 Arm movement device 100 Roll surface inspection device 101 Column members 102 Mounting material 103 Inspection unit mounting part 110 Camera 111 Lens (lens barrel) 120 Lighting Equipment 130 Roll surface inspection control device F1,F2 flowmeter R Roll r Supply route r1 First flow path r2 Second flow path V1, V2 valves

Claims

1. A water draining device is provided in a roll grinding device that grinds a roll placed on a rotating table with a rotary grindstone, and is movable from one end side to the other end side of the roll by a moving device of the roll grinding device that moves the rotary grindstone relative to the roll, The roll has an air nozzle that is provided with a long air discharge portion and that ejects a curtain of compressed air onto the surface of the rotating roll, The first air nozzle and the second air nozzle are arranged side by side in a traveling direction from one end side to the other end side of the roll, A water draining device characterized in that the longitudinal direction of the first air nozzle located at the front of the traveling direction is inclined toward the end of the roll in the traveling direction, and the rear end side of the first air nozzle in the traveling direction is inclined so as to be positioned lower than the front end side.

2. The second air nozzle is disposed so that a longitudinal direction of the second air nozzle is positioned horizontally with respect to the traveling direction, The water draining device described in claim 1, characterized in that, in the direction of travel, the rear end of the air outlet portion of the first air nozzle is located below the front end of the air outlet portion of the second air nozzle, and the curtain-shaped compressed air outlet areas are arranged so as to partially overlap each other.

3. The water draining device described in claim 1, characterized in that the longitudinal directions of both the first air nozzle and the second air nozzle are inclined toward the end of the roll in the traveling direction, and the rear end sides of the first air nozzle and the second air nozzle in the traveling direction are inclined so as to be positioned lower than the front end sides.

4. 4. The water draining device according to claim 3, wherein a front end of the air outlet portion of the second air nozzle is disposed spaced apart from a rear end of the air outlet portion of the first air nozzle.

5. 2. The water draining device according to claim 1, wherein an inclination angle of the first air nozzle in the longitudinal direction is between 40 degrees and 55 degrees with respect to the traveling direction.

6. 4. The water draining device according to claim 3, wherein the inclination angles of the first air nozzle and the second air nozzle in the longitudinal direction are between 40 degrees and 55 degrees with respect to the traveling direction.

7. The air discharge portion of the first air nozzle has a discharge angle of 1 degree to 15 degrees based on a direction perpendicular to the roll surface, 2. The water draining device according to claim 1, wherein the compressed air ejected from the first air nozzle is blown obliquely onto the roll surface.

8. 2. The water draining device according to claim 1, wherein a clearance between the air discharge portion of the first air nozzle and the roll surface in a direction perpendicular to the roll surface is 1 mm or more and 5 mm or less.

9. a compressed air supply mechanism that supplies compressed air to the first air nozzle and the second air nozzle; The compressed air supply mechanism includes: Air compressor and a first flow path branching from a supply path of the air compressor and connected to the first air nozzle; a second flow path branching from the supply path and connected to the second air nozzle; a valve provided in each of the first flow path and the second flow path, 2. The water draining device according to claim 1, wherein an amount of compressed air supplied to the first air nozzle is greater than an amount of compressed air supplied to the second air nozzle.

10. The valve is a solenoid valve, The compressed air supply mechanism further includes a flow rate control unit that adjusts an opening degree of the solenoid valve. The water draining device described in claim 9, characterized in that after the first air nozzle at the front passes the other end of the roll in the direction of travel, the flow control unit controls the solenoid valve to supply the compressed air that was being supplied to the first air nozzle to the subsequent second air nozzle, thereby increasing the amount of compressed air sprayed from the second air nozzle when the second air nozzle passes the other end of the roll.

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