Rolling device

Abstract

To provide a rolling device which is effective for suppressing wear of a housing.SOLUTION: A rolling device 1 includes: a rolling roll 10 for rolling a material W; a roll chock 31 for holding the rolling roll 10; a housing 40 which has an inner surface 41 crossing in a feed direction D1 of the material W, and stores the roll chock 31; an outer layer liner 120 which is mounted on the roll chock 31 so as to be capable of being moved in a vertical direction, and is brought into contact with the inner surface 41; and an inner layer liner 130 which is mounted on the roll chock 31 so as to be positioned between the outer layer liner 120 and the roll chock 31, and is slid with respect to the outer layer liner 120 in response to a vertical motion of the roll chock 31.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a rolling apparatus. [Background technology]

[0002] Patent Document 1 discloses a device for sliding a roll chock, which is fitted with a bearing that supports a roll, along a housing device. This device includes a guide roller provided on the roll chock or the housing, and a pressure mechanism that applies pressure to the guide roller to eliminate the gap between the roll chock and the housing and enable sliding. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 06-198315 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a rolling device that is effective in reducing wear on the housing. [Means for solving the problem]

[0005] A rolling apparatus according to one aspect of the present disclosure comprises a rolling roll for rolling a material, a roll chock for holding the rolling roll, a housing having an inner surface that intersects the feed direction of the material and that accommodates the roll chock, an outer layer liner attached to the roll chock so as to be movable in the vertical direction and in contact with the inner surface, and an inner layer liner attached to the roll chock so as to be positioned between the outer layer liner and the roll chock and that slides against the outer layer liner in response to the vertical movement of the roll chock.

[0006] According to this rolling device, the inner layer liner slides against the outer layer liner in response to the up and down movement of the roll chocks, so that the outer layer liner is prevented from sliding against the housing, and therefore wear of the housing caused by the up and down movement of the roll chocks is prevented.

[0007] A cover may be further provided between the inner surface and the roll chock to surround the gap between the outer layer liner and the inner layer liner, which can prevent foreign matter such as scale generated during rolling from entering between the outer layer liner and the inner layer liner, thereby suppressing damage to the outer layer liner and the inner layer liner caused by the entry of foreign matter.

[0008] The roll chock may further include a liner holder that holds the outer layer liner to allow it to move up and down relative to the roll chock and seals between the cover and the outer layer liner. By adopting a liner holder that has both the function of holding the outer layer liner to allow it to move up and down and the function of sealing between the cover and the outer layer liner, the number of parts can be reduced.

[0009] The roll chock may further include an actuator for pushing the inner layer liner toward the outer layer liner. The gap between the outer layer liner and the inner surface and the gap between the outer layer liner and the inner layer liner can be reduced to suppress damage caused by the intrusion of foreign matter. In addition, the outer layer liner and the inner surface are in contact with each other, and the outer layer liner and the inner layer liner are maintained in contact with each other, thereby stabilizing the behavior of the outer layer liner and the inner layer liner. Furthermore, since the horizontal movement of the roll chock is suppressed, problems caused by the horizontal movement of the roll chock, such as chattering of the material, are suppressed.

[0010] The rolling mill may further include an upper actuator provided on the roll chock so as to be positioned above the central axis of the rolling roll, and pushing the inner layer liner toward the outer layer liner, and a lower actuator provided on the roll chock so as to be positioned below the central axis of the rolling roll, and pushing the inner layer liner toward the outer layer liner. By pushing the inner layer liner toward the outer layer liner at two points, upper and lower, the contact area between the inner surface and the outer layer liner and between the outer layer liner and the inner layer liner is enlarged, and the contact pressure is reduced, thereby reducing wear of the outer layer liner and the inner layer liner.

[0011] The coefficient of dynamic friction between the outer liner and the inner liner may be lower than the coefficient of dynamic friction between the outer liner and the inner surface. By making it easier for the inner liner to slide against the outer liner, wear on the housing can be further suppressed.

[0012] The housing may have a second inner surface facing the inner surface, the roll chocks may be accommodated between the inner surface and the second inner surface, and the rolling device may further include a second outer layer liner attached to the roll chocks so as to be movable in the vertical direction and in contact with the second inner surface, and a second inner layer liner attached to the roll chocks so as to be located between the second outer layer liner and the roll chocks and sliding against the second outer layer liner in response to the vertical movement of the roll chocks. Wear of the housing can be suppressed on both the inner surface and the second inner surface. Effect of the Invention

[0013] According to the present disclosure, it is possible to provide a rolling device that is effective in suppressing wear on the housing. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a cross-sectional view illustrating the configuration of a rolling device. [Diagram 2] FIG. 2 is a side view of the rolling apparatus of FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4]FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] 13 is a diagram illustrating a state in which the actuator has retracted the outer layer liner. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, the embodiments will be described in detail with reference to the drawings. In the description, the same elements or elements having the same functions are denoted by the same reference numerals, and duplicated description will be omitted.

[0016] The rolling mill 1 shown in FIG. 1 is a device for rolling materials such as metal. For example, the rolling mill 1 rolls a material W moving along a horizontal feed direction D1. The rolling mill 1 includes a pair of rolls 10, 20, a drive side unit 30A, and a work side unit 30B. The rolls 10, 20 are arranged vertically in parallel to each other, and roll the material W by sandwiching it from above and below. Each of the rolls 10, 20 is aligned along a width direction D2. The width direction D2 is horizontal and perpendicular to the feed direction D1.

[0017] The rolling roll 10 has roll necks 11 and 12 at both ends. The roll necks 11 and 12 protrude in opposite directions from each other along the width direction D2. The roll neck 11 is connected to a spindle 91 of a driving device 90. Similarly, the rolling roll 20 has roll necks 21 and 22 at both ends. The roll necks 21 and 22 protrude in opposite directions from each other along the width direction D2. The roll neck 21 is connected to a spindle 92 of the driving device 90.

[0018] Hereinafter, in the width direction D2, the side toward which the roll necks 11, 21 face is referred to as the “drive side” of the rolling mill 1, and the side toward which the roll necks 12, 22 face is referred to as the “work side” of the rolling mill 1. Work such as maintenance or replacement of the work rolls 10, 20 is performed on the work side of the rolling mill 1.

[0019] The driving side unit 30A holds the roll necks 11 and 21 on the driving side. The working side unit 30B holds the roll necks 12 and 22 on the working side.

[0020] The drive side unit 30A has drive side roll chocks 31, 32, a drive side housing 40, a drive side screw down device 33, and a drive side screw up device 34. The roll chock 31 holds the roll neck 11 so that it can rotate about an axis along the width direction D2. For example, the roll chock 31 supports the roll neck 11 by a roller bearing or the like. Similarly, the roll chock 32 holds the roll neck 21 so that it can rotate about an axis along the width direction D2. For example, the roll chock 32 supports the roll neck 21 by a roller bearing or the like.

[0021] The housing 40 accommodates the roll chocks 31, 32. For example, the housing 40 surrounds the roll chocks 31, 32 in the circumferential direction about an axis along the width direction D2. The screw-down device 33 is provided in the upper part of the housing 40 and raises and lowers the roll chock 31. The screw-down device 33 raises and lowers the roll chock 31 by, for example, a screw type, a hydraulic actuator type, or a combination of these. The press-up device 34 is provided in the lower part of the housing 40 and raises and lowers the roll chock 32. The press-up device 34 raises and lowers the roll chock 32 by, for example, a screw type or a hydraulic actuator type.

[0022] Similar to the drive side unit 30A, the work side unit 30B has work side roll chocks 31, 32, a work side housing 40, a work side screw down device 33, and a work side press up device 34. The roll chock 31 of the work side unit 30B holds the roll neck 12 so as to be rotatable about an axis along the width direction D2. The roll chock 32 of the work side unit 30B holds the roll neck 22 so as to be rotatable about an axis along the width direction D2.

[0023] 2, the housing 40 has inner surfaces 41 and 42. The inner surfaces 41 and 42 face each other and intersect (for example, perpendicular to) the feed direction D1. The roll chocks 31 and 32 are accommodated between the inner surfaces 41 and 42.

[0024] The inner surface 41 may be covered by a housing liner 43. When the housing liner 43 is attached to the housing 40, the surface of the housing liner 43 becomes the inner surface 41 of the housing 40. Similarly, the inner surface 42 may be covered by a housing liner 44. When the housing liner 44 is attached to the housing 40, the surface of the housing liner 44 becomes the inner surface 42 of the housing 40. The housing liners 43, 44 are made of a material such as carbon steel (S45C(H), SCM440(H), etc.).

[0025] During rolling, the roll chocks 31, 32 move up and down as the material W enters or passes through, and the roll chocks 31, 32 rub against the housing 40 in the vertical direction. The housing liners 43, 44 prevent the main body of the housing 40 (excluding the housing liners 43, 44) from being worn down by the rubbing against the roll chocks 31, 32. However, if the housing liners 43, 44 are worn down, a worker must enter the housing 40 to perform a major replacement operation. Therefore, the rolling device 1 further includes an outer layer liner 120 that is attached to the roll chocks 31, 32 so as to be movable in the vertical direction and is in contact with the inner surface 41 (housing liner 43), and an inner layer liner 130 that is attached to the roll chocks 31, 32 so as to be located between the outer layer liner 120 and the roll chocks 31, 32 and slides against the outer layer liner 120 in response to the vertical movement of the roll chocks 31, 32.

[0026] According to this configuration, the inner layer liner 130 slides against the outer layer liner 120 in response to the up and down movement of the roll chocks 31, 32, thereby suppressing the sliding of the outer layer liner 120 against the housing 40. Therefore, at least on the inner surface 41, wear of the housing 40 (e.g., wear of the housing liner 43) caused by the up and down movement of the roll chocks 31, 32 is suppressed.

[0027] The rolling device 1 may further include an outer layer liner 220 attached to the roll chocks 31, 32 so as to be movable in the vertical direction and in contact with the inner surface 42 (housing liner 44), and an inner layer liner 230 attached to the roll chocks 31, 32 so as to be located between the outer layer liner 220 and the roll chocks 31, 32 and sliding against the outer layer liner 220 in response to the vertical movement of the roll chocks 31, 32. Wear of the housing can be suppressed on both the inner surface 41 and the inner surface 42.

[0028] For example, the rolling apparatus 1 has a liner unit 100 and a liner unit 200 in each of the roll chocks 31, 32. The liner unit 100 is provided in each of the roll chocks 31, 32 so as to be located between the inner surface 41 and the roll chocks 31, 32. The liner unit 200 is provided in each of the roll chocks 31, 32 so as to be located between the inner surface 42 and the roll chocks 31, 32.

[0029] Fig. 3 is a cross-sectional view taken along line III-III in Fig. 2, showing the liner unit 100 and the liner unit 200 provided in the roll chock 31. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 3. The illustration and description of the liner unit 100 and the liner unit 200 provided in the roll chock 32 are omitted. As shown in Fig. 3, the liner unit 100 has a base block 110, an outer layer liner 120, an inner layer liner 130, a cover 140, and a liner holder 150.

[0030] The base block 110 is fixed to the roll chock 31 so as to be located between the inner surface 41 and the roll chock 31. Since the base block 110 is fixed to the roll chock 31, being provided (e.g., being fixed or attached) to the base block 110 corresponds to being provided to the roll chock 31.

[0031] The outer layer liner 120 is attached to the base block 110 so as to be movable in the vertical direction, and contacts the inner surface 41 (housing liner 43). For example, the outer layer liner 120 is located between the inner surface 41 and the base block 110. The outer layer liner 120 is made of a material such as carbon steel (S25C(N), S45C(N), etc.) or copper alloy, which has a lower strength than the material of the housing liner 43, and has surfaces 121, 122, and a flange 123. The surface 121 faces the inner surface 41, and the surface 122 faces the base block 110. The flange 123 protrudes outward from a portion of the outer peripheral surface of the outer layer liner 120 near the surface 122 over the entire circumference. The surface 122 may be treated (such as high-frequency hardening) to improve wear resistance. The outer layer liner 120 has a multi-layer structure, and the multi-layers may be made of different materials. For example, the outer layer liner 120 may have an outer layer constituting the surface 121 and an inner layer constituting the surface 122, and the outer layer may be made of a material having a lower strength than the material of the inner layer. For example, the outer layer may be made of a copper alloy or the like, and the inner layer may be made of carbon steel (S25C(N), S45C(N), or the like).

[0032] The inner layer liner 130 is attached to the base block 110 so as to be positioned between the outer layer liner 120 and the roll chock 31, and slides relative to the outer layer liner 120 in response to the up and down movement of the roll chock 31. For example, the inner layer liner 130 is positioned between the outer layer liner 120 and the base block 110. The inner layer liner 130 is made of carbon steel (S25C(N), S45C(N), etc.) or a copper alloy material, and has a surface 131 and a surface 132. The surface 131 faces the surface 122 of the outer layer liner 120, and the surface 132 faces the base block 110. The surface 131 may be covered with a high-strength fiber or resin, such as PTFE fiber or resin, having a low dynamic friction coefficient.

[0033] The dynamic friction coefficient between the outer layer liner 120 and the inner layer liner 130 may be lower than the dynamic friction coefficient between the outer layer liner 120 and the inner surface 41. By making it easier for the inner layer liner 130 to slide against the outer layer liner 120, wear of the housing 40 can be further suppressed. For example, when the materials of the housing liner 43, the outer layer liner 120, and the inner layer liner 130 exemplified above are combined, the dynamic friction coefficient between the housing liner 43 and the outer layer liner 120 is 0.1 to 0.2, and the dynamic friction coefficient between the outer layer liner 120 and the inner layer liner 130 is 0.005 to 0.05.

[0034] The cover 140 surrounds the space between the outer layer liner 120 and the inner layer liner 130 between the inner surface 41 and the roll chock 31. "Surrender" does not necessarily mean "surround the entire circumference" but includes "surround partially." The cover 140 prevents foreign matter such as scale (e.g., iron oxide) generated during rolling from penetrating between the outer layer liner 120 and the inner layer liner 130, thereby suppressing damage to the outer layer liner 120 and the inner layer liner 130 caused by the penetration of foreign matter.

[0035] As shown in FIG. 3 and FIG. 4, the cover 140 has side walls 141, 142 and a top plate 143. The side walls 141, 142 are aligned in the width direction D2 and each protrude from the base block 110 toward the inner surface 41. The side walls 141, 142 extend in the vertical direction so as to cover both sides of the outer layer liner 120 and the inner layer liner 130 in the width direction D2. An inward flange 144 protruding toward the side wall 142 is formed on the edge of the side wall 141 facing the inner surface 41. An inward flange 145 protruding toward the side wall 141 is formed on the edge of the side wall 142 facing the inner surface 41. The top plate 143 protrudes from the base block 110 toward the inner surface 41 above the side walls 141, 142 so as to cover the upper portions of the outer layer liner 120 and the inner layer liner 130.

[0036] The liner holder 150 holds the outer layer liner 120 so as to allow it to move up and down relative to the roll chock 31, and seals between the cover 140 and the outer layer liner 120. The liner holder 150 is made of a resin material such as engineering plastic or a metal material. For example, the liner holder 150 surrounds the outer layer liner 120 around an axis along the feed direction D1 and protrudes outward from the outer layer liner 120. In the feed direction D1, the inner edge of the outer layer liner 120 faces the flange 123 of the outer layer liner 120, and the outer edge of the outer layer liner 120 faces the inward flanges 144, 145 of the side walls 141, 142. This seals at least between the side walls 141, 142 and the outer layer liner 120.

[0037] The liner holder 150 is attached to the cover 140 so as to be movable up and down relative to the roll chocks 31. For example, the liner holder 150 is suspended from the top plate 143 via an elastic member 151 such as a coil spring, as shown in Fig. 4. This allows the outer layer liner 120 to be attached to the base block 110 so as to be movable in the up and down direction. Note that the liner holder 150 does not necessarily have to be attached to the cover 140, and may be attached to the base block 110 via an elastic member 151 such as a coil spring.

[0038] In this way, by adopting the liner holder 150 which combines the function of holding the outer layer liner 120 to allow it to move up and down and the function of sealing between the cover 140 and the outer layer liner 120, the number of parts can be reduced.

[0039] 3, the liner unit 100 may further include an actuator 160. The actuator 160 is provided in the roll chock 31 and pushes the inner layer liner 130 toward the outer layer liner 120. For example, the actuator 160 is provided in the base block 110.

[0040] For example, actuator 160 is a pressure-type actuator driven by the pressure of a working fluid, and has an operating space 161, a piston 162, and a piston rod 163. The operating space 161 is formed in the base block 110 and contains a working fluid. The piston 162 is contained in the operating space 161 and moves forward and backward along the feed direction D1 by the pressure of the working fluid. In the description of actuator 160, "front" means a direction approaching the inner surface 41, and "rear" means a direction moving away from the inner surface 41.

[0041] The piston rod 163 is connected to the piston 162 and protrudes forward from the base block 110. The inner layer liner 130 is attached to the piston rod 163 so as to cover the end face of the piston rod 163 protruding from the base block 110.

[0042] The working fluid of the actuator 160 may be a gas or a liquid. For example, the working fluid may be air, oil, or a lubricant. When the working fluid is a lubricant, for example, the piston rod 163 and the inner layer liner 130 may have a flow path formed therein to guide the lubricant between the outer layer liner 120 and the inner layer liner 130. In this case, the working fluid can also be effectively used for lubrication between the inner layer liner 130 and the outer layer liner 120.

[0043] 3 shows a state in which the piston 162 advances due to the pressure of the working fluid, and the piston rod 163, which advances together with the piston 162, pushes the inner layer liner 130 toward the outer layer liner 120. In this state, the outer layer liner 120 is pressed against the inner surface 41 without any gaps, and the inner layer liner 130 is pressed against the outer layer liner 120 without any gaps. This makes it possible to suppress damage caused by the intrusion of foreign matter between the outer layer liner 120 and the inner surface 41 or between the inner layer liner 130 and the outer layer liner 120. In addition, by maintaining the state in which the outer layer liner 120 and the inner layer liner 41 are in contact with each other and the outer layer liner 120 and the inner layer liner 130 are in contact with each other, the behavior of the outer layer liner 120 and the inner layer liner 130 can be stabilized.

[0044] Furthermore, as the outer layer liner 120 advances together with the inner layer liner 130, the outer edge of the liner holder 150 is pressed tightly against the inward flanges 144, 145, and the inner edge of the liner holder 150 is pressed tightly against the flange 123. This seals the gap between the outer layer liner 120 and the side walls 141, 142, further preventing foreign matter from entering between the inner layer liner 130 and the outer layer liner 120. Figure 5 shows a state in which the piston 162 has retreated due to the pressure of the working fluid. In this state, the outer layer liner 120 is released from the state in which it is pressed against the inner surface 41, making it easier to remove the roll chock 31 from the housing 40.

[0045] The rolling device 1 may include a pair of actuators 160, each disposed above and below the central axis of the rolling roll 10. For example, as shown in FIG. 4, the rolling device 1 may include a pair of actuators 160A, 160B. The upper actuator 160A is disposed in the base block 110 so as to be positioned above the central axis of the rolling roll 10, and pushes the inner layer liner 130 toward the outer layer liner 120. The lower actuator 160B is disposed in the base block 110 so as to be positioned below the central axis of the rolling roll 10, and pushes the inner layer liner 130 toward the outer layer liner 120.

[0046] Each of the actuators 160A and 160B has the above-mentioned working space 161, a piston 162, and a piston rod 163. The inner layer liner 130 may be divided into a pair of inner layer liners 130A and 130B to correspond to the actuators 160A and 160B, respectively. The inner layer liner 130A is attached to the piston rod 163 of the upper actuator 160A, and the inner layer liner 130B is attached to the piston rod 163 of the lower actuator 160B. The actuators 160A and 160B push the inner layer liner 130 toward the outer layer liner 120 at two points, upper and lower, to improve the uniformity of the pressure distribution between the inner surface 41 and the outer layer liner 120 and between the inner layer liner 130 and the outer layer liner 120, and further stabilize the behavior of the outer layer liner 120 and the inner layer liner 130. Furthermore, since the horizontal movement of the roll chocks 31, 32 is suppressed, problems caused by the horizontal movement of the roll chocks 31, 32, such as chattering of the material, are suppressed.

[0047] The roll chocks 31, 32 may be formed with a pair of protrusions 36 protruding toward the inner surface 41 of the housing 40 above and below the base block 110. The pair of protrusions 36 can position the base block 110 in the vertical direction relative to the roll chocks 31, 32. In addition, the intrusion of scale and the like between the roll chocks 31, 32 and the base block 110 can be suppressed. The roll chocks 31, 32 may be formed with a protrusion 35 protruding toward the outer layer liner 120 between the actuators 160A, 160B, and the base block 110 may be formed with a recess 111 that fits with the protrusion 35. The protrusion 35 and the recess 111 each extend along the axis of the rolling roll 10. The engagement of the projections 35 and the recesses 111 is utilized for vertical positioning of the base block 110 relative to the roll chocks 31, while the thickness T of the roll chocks 31 at the same height as the central axis of the rolling roll 10 is increased, thereby improving the strength of the roll chocks 31. When the projections 35 are engaged with the recesses 111, the pair of projections 36 described above may be omitted.

[0048] As shown in FIGS. 3 and 4, the liner unit 200 includes a base block 210, an outer liner 220, an inner liner 230, a cover 240, and a liner holder 250.

[0049] The base block 210 is fixed to the roll chock 31 so as to be located between the inner surface 42 and the roll chock 31. Since the base block 210 is fixed to the roll chock 31, being provided (e.g., being fixed or attached) to the base block 210 corresponds to being provided to the roll chock 31.

[0050] The outer layer liner 220 is attached to the base block 210 so as to be movable in the vertical direction, and contacts the inner surface 42 (housing liner 44). For example, the outer layer liner 220 is located between the inner surface 42 and the base block 210. For example, the outer layer liner 220 is made of a material similar to that of the outer layer liner 120, and has surfaces 221, 222, and a flange 223. The surface 221 faces the inner surface 42, and the surface 222 faces the base block 210. The flange 223 protrudes outward from a portion of the outer peripheral surface of the outer layer liner 220 closer to the surface 222, over the entire circumference.

[0051] The inner layer liner 230 is attached to the base block 210 so as to be positioned between the outer layer liner 220 and the roll chock 31, and slides relative to the outer layer liner 220 in response to the up and down movement of the roll chock 31. For example, the inner layer liner 230 is positioned between the outer layer liner 220 and the base block 210. For example, the inner layer liner 230 is made of a material similar to that of the inner layer liner 130, and has a surface 231 and a surface 232. The surface 231 faces the surface 222 of the outer layer liner 220, and the surface 232 faces the base block 210.

[0052] The dynamic friction coefficient between the outer layer liner 220 and the inner layer liner 230 may be lower than the dynamic friction coefficient between the outer layer liner 220 and the inner surface 42. For example, by applying the combination of materials exemplified in the description of the outer layer liner 120, the inner layer liner 130, and the housing liner 43 to the outer layer liner 220, the inner layer liner 230, and the housing liner 44, the dynamic friction coefficient between the housing liner 44 and the outer layer liner 220 becomes similar to the dynamic friction coefficient between the housing liner 43 and the outer layer liner 120, and the dynamic friction coefficient between the outer layer liner 220 and the inner layer liner 230 becomes similar to the dynamic friction coefficient between the outer layer liner 120 and the inner layer liner 130.

[0053] The cover 240 surrounds the gap between the outer layer liner 220 and the inner layer liner 230 between the inner surface 42 and the roll chock 31. The cover 240 has side walls 241, 242 and a top plate 243, similar to the cover 140. The side walls 241, 242 are aligned in the width direction D2 and each protrude from the base block 210 toward the inner surface 42. The side walls 241, 242 extend in the vertical direction so as to cover both sides of the outer layer liner 220 and the inner layer liner 230 in the width direction D2. An inward flange 244 protruding toward the side wall 242 is formed on the edge of the side wall 241 facing the inner surface 42. An inward flange 245 protruding toward the side wall 241 is formed on the edge of the side wall 242 facing the inner surface 41. The top plate 243 protrudes from the base block 210 toward the inner surface 42 above the side walls 241 , 242 so as to cover the upper portions of the outer liner 220 and the inner liner 230 .

[0054] The liner holder 250 holds the outer layer liner 220 to allow it to move up and down relative to the roll chock 31, and seals between the cover 240 and the outer layer liner 220. The liner holder 250 is made of the same material as the liner holder 250. For example, the liner holder 250 surrounds the outer layer liner 220 around an axis along the feed direction D1 and protrudes outward from the outer layer liner 220. In the feed direction D1, the inner edge of the outer layer liner 220 faces the flange 223 of the outer layer liner 220, and the outer edge of the outer layer liner 220 faces the inward flanges 244, 245 of the side walls 241, 242. This seals at least between the side walls 241, 242 and the outer layer liner 220.

[0055] The liner holder 250 is attached to the cover 240 so as to be movable up and down relative to the roll chocks 31. For example, the liner holder 250 is suspended from the top plate 243 via an elastic member 251 such as a coil spring, as shown in Fig. 4. This allows the outer layer liner 220 to be attached to the base block 210 so as to be movable in the up and down direction. Note that the liner holder 250 does not necessarily have to be attached to the cover 240, and may be attached to the base block 210 via an elastic member 251 such as a coil spring.

[0056] The liner unit 200 does not need to have an actuator similar to the actuator 160. When the actuator 160 of the liner unit 100 pushes out the outer layer liner 120, the inner layer liner 230 is pressed against the outer layer liner 220 by the reaction force, and the outer layer liner 220 is pressed against the inner surface 42. Therefore, even if the liner unit 200 does not have an actuator, as long as the liner unit 100 has an actuator, the outer layer liner 220 can be pressed against the inner surface 42 without any gaps, and the inner layer liner 230 can be pressed against the outer layer liner 220 without any gaps.

[0057] Neither the liner unit 100 nor the liner unit 200 may have an actuator. Even if neither the liner unit 100 nor the liner unit 200 has an actuator, the roll chock 31 is pressed against the inner surface 41 or the inner surface 42 by a force applied from the material or the like along the feed direction D1. In a situation where the roll chock 31 is pressed against the inner surface 41, the liner unit 100 suppresses wear of the housing liner 43, and in a situation where the roll chock 31 is pressed against the inner surface 42, the liner unit 200 suppresses wear of the housing liner 44.

[0058] 〔summary〕 The above-described embodiment includes the following configurations. (1) A rolling apparatus comprising: a rolling roll 10 for rolling a material W; a roll chock 31 for holding the rolling roll 10; a housing 40 having an inner surface 41 intersecting the feed direction D1 of the material W and accommodating the roll chock 31; an outer layer liner 120 attached to the roll chock 31 so as to be movable in the vertical direction and in contact with the inner surface 41; and an inner layer liner 130 attached to the roll chock 31 so as to be positioned between the outer layer liner 120 and the roll chock 31 and sliding against the outer layer liner 120 in response to the vertical movement of the roll chock 31. According to this rolling device, the inner layer liner 130 slides against the outer layer liner 120 in response to the up and down movement of the roll chocks 31, thereby suppressing the sliding of the outer layer liner 120 against the housing 40. Therefore, wear of the housing 40 caused by the up and down movement of the roll chocks 31 is suppressed.

[0059] (2) The rolling apparatus according to (1), further comprising a cover 140 surrounding the space between the outer layer liner 120 and the inner layer liner 130 between the inner surface 41 and the roll chocks 31. This prevents foreign matter such as scale generated during rolling from penetrating between the outer layer liner 120 and the inner layer liner 130, thereby suppressing damage to the outer layer liner 120 and the inner layer liner 130 caused by the penetration of foreign matter.

[0060] (3) The rolling apparatus according to (2), further comprising a liner holder 150 that holds the outer layer liner 120 to allow it to move up and down relative to the roll chocks 31 and seals between the cover 140 and the outer layer liner 120. By employing the liner holder 150, which has both the function of holding the outer layer liner 120 to allow it to move up and down and the function of sealing between the cover 140 and the outer layer liner 120, the number of parts can be reduced.

[0061] (4) The rolling apparatus according to any one of (1) to (3), further comprising an actuator 160 provided on the roll chock 31 to push the inner layer liner 130 toward the outer layer liner 120. By reducing the gap between the outer layer liner 120 and the inner surface 41 and the gap between the outer layer liner 120 and the inner layer liner 130, damage caused by the intrusion of foreign matter can be suppressed. Also, by maintaining the contact between the outer layer liner 120 and the inner surface 41 and the contact between the outer layer liner 120 and the inner layer liner 130, the behavior of the outer layer liner 120 and the inner layer liner 130 can be stabilized. Furthermore, since the horizontal movement of the roll chocks 31, 32 is suppressed, problems caused by the horizontal movement of the roll chocks 31, 32, such as chattering of the material, can be suppressed.

[0062] (5) A rolling apparatus described in any of (1) to (3), further comprising an upper actuator 160A provided on the roll chock 31 so as to be positioned above the central axis of the rolling roll 10 and pushing the inner layer liner 130 toward the outer layer liner 120, and a lower actuator 160B provided on the roll chock 31 so as to be positioned below the central axis of the rolling roll 10 and pushing the inner layer liner 130 toward the outer layer liner 120. By pushing the inner layer liner 130 toward the outer layer liner 120 at two points, above and below, the contact area between the inner surface 41 and the outer layer liner 120 and between the outer layer liner 120 and the inner layer liner 130 is increased, and the surface pressure is reduced, thereby reducing wear on the outer layer liner and inner layer liner.

[0063] (6) A rolling apparatus according to any one of (1) to (5), wherein the dynamic friction coefficient between the outer layer liner (120) and the inner layer liner (130) is lower than the dynamic friction coefficient between the outer layer liner (120) and the inner surface (41). By making it easier for the inner liner 130 to slide against the outer liner 120, wear on the housing 40 can be further suppressed.

[0064] (7) A rolling apparatus as described in any of (1) to (6), wherein the housing 40 has a second inner surface 42 opposite the inner surface 41, the roll chock 31 is accommodated between the inner surface 41 and the second inner surface 42, and the rolling apparatus further comprises a second outer layer liner 220 attached to the roll chock 31 so as to be movable in the vertical direction and in contact with the second inner surface 42, and a second inner layer liner 230 attached to the roll chock 31 so as to be positioned between the second outer layer liner 220 and the roll chock 31 and sliding against the second outer layer liner 220 in response to the vertical movement of the roll chock 31. Wear of the housing 40 can be suppressed on both the inner surface 41 and the second inner surface 42.

[0065] Although the embodiment has been described above, the present invention is not necessarily limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention. [Explanation of symbols]

[0066] W...material, D1...feed direction, 10...rolling roll, 31...roll chock, 40...housing, 41...inner surface, 42...second inner surface, 120...outer layer liner, 130...inner layer liner, 140...cover, 150...liner holder, 160...actuator, 160A...upper actuator, 160B...lower actuator, 220...second outer layer liner, 230...second inner layer liner.

Claims

1. A rolling roll for rolling the material; A roll chock for holding the rolling roll; A housing having an inner surface intersecting the feed direction of the material and accommodating the roll chock; an outer layer liner attached to the roll chock so as to be movable in a vertical direction and in contact with the inner surface; an inner layer liner attached to the roll chock so as to be positioned between the outer layer liner and the roll chock, and sliding relative to the outer layer liner in response to the up and down movement of the roll chock; A rolling device comprising:

2. A cover is further provided between the inner surface and the roll chock to surround the space between the outer layer liner and the inner layer liner.

2. The rolling mill according to claim 1.

3. The roll chock further includes a liner holder that holds the outer layer liner so as to allow the outer layer liner to move up and down relative to the roll chock and seals between the cover and the outer layer liner.

3. The rolling mill according to claim 2.

4. The roll chock further includes an actuator for pushing the inner layer liner toward the outer layer liner. The rolling device according to any one of claims 1 to 3.

5. an upper actuator provided on the roll chock so as to be positioned above the central axis of the rolling roll and pushing the inner layer liner toward the outer layer liner; A lower actuator is provided on the roll chock so as to be located below the central axis of the rolling roll, and pushes the inner layer liner toward the outer layer liner; Further comprising: The rolling device according to any one of claims 1 to 3.

6. a coefficient of dynamic friction between the outer layer liner and the inner layer liner is lower than a coefficient of dynamic friction between the outer layer liner and the inner surface; The rolling device according to any one of claims 1 to 3.

7. The housing has a second inner surface opposite the inner surface, The roll chocks are accommodated between the inner surface and the second inner surface, The rolling device is a second outer layer liner attached to the roll chock so as to be movable in a vertical direction and in contact with the second inner surface; a second inner layer liner attached to the roll chock so as to be positioned between the second outer layer liner and the roll chock, and sliding relative to the second outer layer liner in response to the up and down movement of the roll chock; Further comprising: The rolling device according to any one of claims 1 to 3.

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