A device and method for dismounting a rolling mill roll

Abstract

The application discloses a kind of flatting mill roll dismounting device and method of roll replacement technical field, including fixed part, radial support part is equipped on fixed part, axial push-pull part, fixed stop part and lifting stop part, and lifting stop part can be set between fixed stop part and axial push-pull part and be lifted;Bearing drawing part, bearing drawing part can be detachably fixed with axial push-pull part Connection, and including cylinder part and radial key tongue part;Bearing press mounting part, bearing press mounting part can be detachably fixed with axial push-pull part Connection, and including barrel part and press mounting part.The application makes that roll dismounting does not need big hammer to knock work, can avoid inner main shaft handling operation, and greatly improve the construction efficiency of wrinkle-free and breakage prevention roll assembly operation, reduce personnel labor load and construction risk.

Description

Technical Field

[0001] This invention relates to the field of roll replacement technology, specifically to a roll disassembly and assembly device and method for a leveling machine. Background Technology

[0002] The leveling machine is usually located at the exit section of the continuous annealing unit and the hot-dip galvanizing unit, and is the core equipment of the production line. The anti-wrinkle and anti-breakage rollers are two rollers inside the leveling machine. Because the rollers are in a high-humidity environment, the bearings are prone to damage, so the bearings often need to be replaced regularly.

[0003] like Figure 14 As shown, the roll includes an outer roll shell 210, an inner main shaft 220, and an end bearing 230. The outer roll shell 210 is a steel sleeve roll shell, the inner main shaft 220 is a solid through shaft and is relatively heavy, and the end bearing shaft 230 is installed at both ends of the inner main shaft 220 and located inside both ends of the outer roll shell 210, making it difficult to remove.

[0004] The existing method for removing the end bearings is as follows: use a sledgehammer to strike one end of the inner spindle, causing the inner spindle to move along the axial direction with one end bearing out of the outer roller shell. The inner spindle is then manually pulled out and placed in the assembly area. At this point, the two end bearings are located on the inner spindle and inside the outer roller shell, respectively. The end bearing on the inner spindle can be removed using a hydraulic puller, but the end bearing inside the outer roller shell needs to be removed by striking a long steel pipe with a sledgehammer on the other side of the outer roller shell to push out the oil seal and the end bearing.

[0005] During the disassembly process, the hammering operation is not only labor-intensive and dangerous, but also the stress is applied at the point of impact, and the stress state inside the outer roll shell cannot be confirmed, which can easily damage the oil seal and cause quality problems. At the same time, there is also a risk of falling and injuring workers during the handling of the inner spindle. All these reasons result in high labor intensity, difficult operation and low disassembly and assembly efficiency of the roll disassembly and assembly. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a roll disassembly and assembly device for a leveling machine, so as to solve the technical problems of high labor intensity and low disassembly and assembly efficiency in existing roll disassembly and assembly.

[0007] The technical solution adopted in this invention is: a roll disassembly and assembly device for a leveling machine, wherein the roll includes an outer roll shell, an inner main shaft, and end bearings, and the disassembly and assembly device includes:

[0008] Fixing part;

[0009] A radial support portion is provided on the fixed portion and is used to provide radial support for the outer roller shell;

[0010] An axial push-pull section, two of which are movably mounted on a fixed section, are used to drive the inner spindle to move axially;

[0011] Two fixed stops are arranged on the fixed part along the axial direction to limit the axial movement of the outer roller shell, so that the outer roller shell can move axially relative to the inner main shaft.

[0012] A lifting stop is provided, which is movably disposed between a fixed stop and an axial push-pull part, and is used to limit the axial movement of the end bearing so that the inner spindle and the end bearing can move axially relative to each other.

[0013] The bearing pull-out part is detachably and fixedly connected to the axial push-pull part, and includes a column part and a radial key tongue part. The radial dimension of the column part is smaller than the radial dimension of the inner spindle. The radial key tongue part is elastically and telescopically disposed on the inner spindle for driving the end bearing to move axially.

[0014] The bearing press-fitting part is detachably and fixedly connected to the axial push-pull part, and includes a cylindrical part and a press-fitting part. The inner diameter of the cylindrical part is larger than the radial dimension of the inner main shaft. The press-fitting part is disposed on the cylindrical part, and the radial dimension of the press-fitting part is smaller than the inner diameter of the outer roller shell, for pushing the end bearing to move axially.

[0015] Preferably, there are two radial support portions, which are vertically and vertically mounted on the fixed portion.

[0016] Preferably, the radial support includes a lifting block and a support block, the two ends of the lifting block being slidably connected to the longitudinal slide rail of the fixed part; the bottom of the support block is connected to the lifting block, and the top is provided with a V-shaped support surface.

[0017] Preferably, the axial push-pull part includes a driving hydraulic cylinder, a fixed support, and a sliding support. The fixed support is fixedly connected to the end of the fixed part. The fixed end of the driving hydraulic cylinder is fixedly connected to the fixed support, and the movable end is connected to the sliding support. The end of the fixed part is provided with an inner guide rail along the axial direction. The bottom end of the sliding support is slidably connected to the inner guide rail, and the top of the sliding support is provided with an insertion mounting groove that cooperates with the bearing pull-out part or the bearing press-fit part.

[0018] Preferably, the insertion mounting slot is a T-shaped slot.

[0019] Preferably, the end of the fixing part is provided with an outer guide rail along the axial direction, the bottom of the fixing stop part is slidably connected to the outer guide rail, and is detachably fixedly connected to the fixing part; the fixing stop part is provided with a clearance slot, the radial dimension of the clearance slot is larger than the radial dimension of the end bearing, and smaller than the radial dimension of the outer roller shell.

[0020] Preferably, the fixed stop is provided with a longitudinal sliding groove; the lifting stop includes a lifting baffle and a lifting hydraulic cylinder, one end of the lifting hydraulic cylinder is fixedly connected to the fixed part, and the other end is fixedly connected to the lifting baffle; the lifting baffle is slidably connected in the longitudinal sliding groove, and the lifting baffle is provided with a support groove that matches the clearance slot hole, and the radial dimension of the support groove is smaller than the radial dimension of the end bearing.

[0021] Preferably, the bearing pull-out portion further includes a first T-shaped insertion portion, which is fixedly connected to one end of the column portion; the column portion is provided with a radial mounting hole; the column portion is provided with a mounting groove connected to the radial mounting hole, and a fixing pressure plate is installed in the mounting groove; one end of the radial key tongue portion is disposed in the radial mounting hole and abuts against the return spring in the radial mounting hole, and the other end passes through the fixing pressure plate radially.

[0022] Preferably, the bearing press-fitting part further includes a second T-shaped insertion part, which is fixedly connected to one end of the cylindrical part; the press-fitting part is annular and is fixedly connected to the other end of the cylindrical part.

[0023] Preferably, the fixing part includes a fixing frame, traveling wheels and lifting lugs. The traveling wheels are installed at the bottom of the fixing frame for horizontal movement of the fixing frame; the lifting lugs are located at the top of the fixing frame for lifting the fixing frame.

[0024] Another object of the present invention is to provide a method for disassembling and assembling rolls for a leveling machine, the method using the above-mentioned disassembly and assembly device for leveling machine rolls, the method comprising the following steps:

[0025] S10: Roll disassembly; including:

[0026] The rolls are hoisted onto the radial support.

[0027] Connect the bearing pull-out part and the clamping shaft to the axial push-pull part one by one;

[0028] The opposing axial movements of the two axial push-pull parts drive the bearing pull-out part and the clamping shaft to move axially in opposite directions and clamp the inner main shaft.

[0029] The axial push-pull part drives the bearing pull-out part to move axially, causing the inner main shaft and the outer roller shell to move axially relative to each other until the radial key tongue of the bearing pull-out part pops out radially. At the same time, the end bearing of one end of the inner main shaft moves axially between the lifting stop part and the axial push-pull part.

[0030] Raise the lifting stop to the stop position;

[0031] The axial push-pull part drives the clamping shaft to move axially, causing the inner main shaft and the end bearing to move axially relative to each other until one end bearing is separated from the inner main shaft and the other end bearing is separated from the outer roller shell.

[0032] S20: Roll installation; includes:

[0033] The lifting stop is raised to the radial support position to provide radial support for the inner main shaft and to keep the inner main shaft and outer roller shell coaxial.

[0034] An extension shaft with end bearings is connected to both ends of the inner main shaft;

[0035] Remove the bearing pull-out part and the clamping shaft from the axial push-pull part, and connect the two bearing press-fit parts to the axial push-pull part one by one;

[0036] The two axial push-pull parts are driven to move axially in opposite directions by the reverse axial movement of the two bearing press-fitting parts and clamp the two end bearings.

[0037] Lower the lifting stop to the avoidance position;

[0038] Through the synchronous reverse action of the two axial push-pull parts, the drive bearing pressing part pushes the end bearing axially to move into the outer roller shell.

[0039] The beneficial effects of this invention are:

[0040] 1. This invention utilizes a relative movement method. First, the radial support part provides radial support to the outer roller shell, and the fixed stop part provides axial limitation to the outer roller shell. The axial push-pull part pushes the inner main shaft in the forward direction, causing the inner main shaft to drive the end bearing at one end to move axially and separate from the outer roller shell. Then, the lifting stop part axially limits the end bearing, and the bearing pulling part pulls the end bearing. The axial push-pull part pushes the inner main shaft in the reverse direction, causing the end bearing to move relative to and separate from the inner main shaft and outer roller shell, thus achieving the disassembly of the two end bearings. Finally, the lifting stop part supports the inner main shaft, keeping it coaxial with the outer roller shell. The extension shaft connects the two end bearings to the inner main shaft. The bearing pressing part pushes the end bearings in the reverse direction, pressing them into place, completing the installation of the two end bearings. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of the roll disassembly device for the leveling machine of the present invention;

[0042] Figure 2 This is a structural schematic diagram of the fixing part;

[0043] Figure 3 This is an axonal view of the bearing pull-out section;

[0044] Figure 4 This is one of the structural schematic diagrams of the bearing pull-out section;

[0045] Figure 5 This is the second schematic diagram of the bearing puller.

[0046] Figure 6 This is a diagram of the internal structure of a bearing puller;

[0047] Figure 7 Axonometric drawing of the inner column;

[0048] Figure 8 A three-dimensional schematic diagram of the axial push-pull section;

[0049] Figure 9 This is the front view of the bearing press-fit section;

[0050] Figure 10 This is a schematic diagram of the radial support section;

[0051] Figure 11 This is a structural schematic diagram of the fixed stop.

[0052] Figure 12 This is a structural schematic diagram of the lifting stop section;

[0053] Figure 13 This is a reference diagram showing the usage state of the roll disassembly device for a leveling machine according to the present invention;

[0054] Figure 14 This is a schematic diagram of the structure of a rolling mill roll.

[0055] Explanation of the reference numerals in the figure:

[0056] 100. Disassembly and assembly device;

[0057] 110. Fixing part;

[0058] 111. Fixed frame; 112. Wheels; 113. Lifting lugs; 114. Mounting plate; 115. Inner guide rail; 116. Outer guide rail; 117. Longitudinal slide rail;

[0059] 120. Radial support section;

[0060] 121. Lifting block; 122. Support block; 123. Drive motor; 124. Transmission screw; 125. Worm screw jack;

[0061] 130. Axial push-pull section;

[0062] 131. Drive hydraulic cylinder; 132. Fixed support; 133. Sliding support; 134. Insertion mounting slot; 135. Hydraulic station;

[0063] 140. Fixed stop part;

[0064] 141. Stop plate; 142. Side plate; 143. Bottom plate; 144. Longitudinal groove; 145. Clearance slot; 146. Connecting through hole;

[0065] 150. Lifting stop section;

[0066] 151. Lifting baffle; 152. Lifting hydraulic cylinder; 153. Support groove;

[0067] 160. Bearing pull-out section;

[0068] 161. Column part; 162. Radial key tongue part; 163. First T-shaped insertion part; 164. Mounting groove; 165. Return spring; 166. Screw; 167. Fixing pressure plate; 168. Connecting rod; 169. Radial mounting hole;

[0069] 1611. Outer cylinder; 1612. Inner cylinder;

[0070] 170. Bearing press-fitting section;

[0071] 171. Cylinder body; 172. Press-fitting part; 173. Second T-shaped insertion part;

[0072] 180. Extend the shaft;

[0073] 200. Rolls;

[0074] 210. Outer roller shell; 220. Inner main shaft; 230. End bearing; 240. Oil seal. Detailed Implementation

[0075] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0076] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0077] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0078] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0079] Examples, such as Figures 1-14 As shown, a roll disassembly and assembly device for a leveling machine is used for replacing the end bearing 230 inside the roll 200; wherein the roll 200 includes an outer roll shell 210, an inner main shaft 220, an end bearing 230, and an oil seal 240; the disassembly and assembly device 100 includes:

[0080] The fixing part 110 extends in a direction (also called the length direction) parallel to the axis of the roll 200.

[0081] A radial support portion 120 is provided on the fixing portion 110 for providing radial support to the outer roller shell 210 in the vertical direction.

[0082] Two axial push-pull portions 130 are provided, one for each of the two ends of the fixed portion 110 extending in the direction of extension, and are used to drive the inner spindle 220 to move axially.

[0083] There are two fixed stop parts 140, which are arranged on the fixed part 110 along the axial direction of the roll 200 and located between the two axial push-pull parts 130. They are used to limit the axial movement of the outer roll shell 210 so that the outer roll shell 210 and the inner main shaft 220 can move axially relative to each other.

[0084] The lifting stop 150 is vertically and vertically disposed between the fixed stop 140 and the axial push-pull part 130, and is used to limit the axial movement of the end bearing 230 so that the inner spindle 220 and the end bearing 230 can move axially relative to each other.

[0085] The bearing pull-out portion 160 is detachably and fixedly connected to the axial push-pull portion 130. The bearing pull-out portion 160 includes a column portion 161 and a radial key tongue portion 162. The radial dimension of the column portion 161 is smaller than the radial dimension of the inner spindle 220, so that the column portion 161 can push the inner spindle 220 to move axially and separate from the end bearing 230. The radial key tongue portion 162 is elastically telescopically disposed on the inner spindle 220, so that the column portion 161 can pull the end bearing 230 to move axially.

[0086] The bearing press-fitting part 170 is detachably and fixedly connected to the axial push-pull part 130. The bearing press-fitting part 170 includes a cylindrical part 171 and a press-fitting part 172. The inner diameter of the cylindrical part 171 is larger than the radial dimension of the inner main shaft 220 so that the cylindrical part 171 can be fitted onto the inner main shaft 220. The press-fitting part 172 is disposed on the cylindrical part 171, and the radial dimension of the press-fitting part 172 is smaller than the inner diameter of the outer roller shell 210 so that the press-fitting part 172 can push the end bearing 230 to move axially.

[0087] This application employs a method of relative movement between the outer and inner roller shells. First, the radial support part 120 provides radial support to the outer roller shell 210, and the fixing stop part 140 provides axial limitation to the outer roller shell 210, thus fixing the outer roller shell 210. Then, the axial push-pull part 130 pushes the inner main shaft 220 in the forward direction, realizing the relative movement between the inner main shaft 220 and the outer roller shell 210. This causes the inner main shaft 220 to drive the end bearing 230 at one end to move axially and separate from the outer roller shell 210. Then, the lifting stop part 150 axially limits the end bearing 230, and the bearing pulling part 160 pulls the end bearing 230 and the axial push-pull part 130 pushes the inner main shaft 220 in the reverse direction, realizing the relative movement and separation of the outer roller shell 210, the inner main shaft 220, and the end bearing 230, thereby completing the disassembly of the two end bearings 230. Finally, the lifting stop 150 supports and positions the inner main shaft 220, keeping the inner main shaft 220 and the outer roller shell 210 coaxial. The extension shaft 180 connects the two end bearings 230 to the inner main shaft 220. The bearing pressing part 170 pushes the end bearings 230, realizing the relative movement of the end bearings 230 with the outer roller shell 210 and the inner main shaft 220, and pressing the two end bearings 230 into place in the opposite direction, thus completing the installation of the two end bearings 230.

[0088] In one specific embodiment, such as Figure 2As shown, the fixing part 110 includes a fixing frame 111, traveling wheels 112, and lifting lugs 113. The fixing frame 111 is generally rectangular, and its length direction (also called the extension direction) is parallel to the axis of the roll 200. Four traveling wheels 112 are fixedly installed at four positions on the bottom of the fixing frame 111, and the traveling wheels 112 are used for the horizontal movement of the fixing frame 111. Four lifting lugs 113 are fixedly installed at four positions on the top of the fixing frame 111, and the lifting lugs 113 are used for lifting the fixing frame 111.

[0089] This design is because: the fixing part 110 adopts a frame structure, which not only reduces the weight of the fixing part 110, but also allows equipment to be installed inside the fixing frame 111; the fixed frame 111 is equipped with casters 112 at the bottom, which allows the roll assembly / disassembly device 100 to move horizontally, facilitating the adjustment of the horizontal position of the roll assembly / disassembly device 100; and the fixed frame 111 is equipped with lifting lugs 113 at the top, which allows the roll assembly / disassembly device 100 to be hoisted, facilitating its movement between different production lines.

[0090] In one specific embodiment, such as Figure 1 , Figure 10 As shown, there are two radial support parts 120, which are vertically and vertically mounted on the fixed part 110.

[0091] This configuration is because, during the entire replacement process of the end bearing 230, it is necessary to ensure that the outer roll shell 210, inner main shaft 220, bearing pull-out part 160, and bearing press-fit part 170 are coaxial. However, in actual production, the roll 200 has various specifications, such as 250mm*1900mm and 350mm*2100mm; for rolls 200 of different specifications, the same roll assembly / disassembly device 100 is difficult to meet the coaxiality requirement. In this embodiment, two radial support parts 120 are flexibly and height-adjustably arranged at both ends of the extension direction of the fixed part 110. By raising and lowering the radial support parts 120, the distance between the radial support parts 120 and the support axis can be changed, thus making it suitable for radial support of rolls 200 of different specifications.

[0092] Preferably, the radial support portion 120 includes a lifting block 121 and a support block 122. The lifting block 121 is arranged along the width direction of the fixing portion 110, and both ends of the lifting block 121 in the width direction are slidably connected to the longitudinal slide rail 117 on the fixing portion 110 in the vertical direction. The bottom of the support block 122 is connected to the lifting block 121, and the top is provided with a V-shaped support surface so that the lifting block 122 can be raised and lowered by the sliding of the lifting block 121 on the longitudinal slide rail 117. At the same time, a rubber protective layer is also provided on the V-shaped support surface to protect the surface of the outer roller shell 210.

[0093] This is because: a V-shaped support surface is provided on the top of the support block 122, and the rollers 200 of different specifications can be radially supported by the contact between the two inclined surfaces of the V-shaped support surface and the outer roller shell 210; at the same time, the lifting block 122 can be lifted and lowered by sliding the lifting block 121 on the longitudinal slide rail 117.

[0094] The lifting of the lifting block 121 can be achieved using any existing power mechanism, such as a lifting hydraulic cylinder. A detailed description of an electric lifting mechanism follows. This electric lifting mechanism includes a drive motor 123, a transmission screw 124, and a worm gear screw jack 125. The drive motor 123 is fixedly installed in the middle of the fixed frame 111, located between the two lifting blocks 121. The power output shaft of the drive motor 123 is coaxially connected to the two transmission screws 124. There are two worm gear screw jacks 125, each fixedly installed directly below the lifting block 121. One end of each worm gear screw jack 125 is connected to one end of the transmission screw 124, and the lifting end is fixedly connected to the lifting block 121. The rotation of the drive motor 123 drives the two lifting blocks 121 to rise or fall synchronously, thereby ensuring that the roll 200 is coaxial with the bearing drawing part 160 and the bearing pressing part 170.

[0095] In one specific embodiment, such as Figure 1 , Figure 8 As shown, the axial push-pull part 130 includes a drive hydraulic cylinder 131, a fixed support 132, a sliding support 133, and a hydraulic station 135; the fixed support 132 is fixedly connected to the end of the fixed frame 111 of the fixed part 110; the drive hydraulic cylinder 131 is arranged axially along the roll 200, and the fixed end of the drive hydraulic cylinder 131 is fixedly connected to the fixed support 132, and the movable end is connected to the sliding support 133; mounting plates 114 are fixedly installed above both ends of the fixed frame 111, and two inner guide rails 115 are provided on the mounting plates 114 along the axial direction of the roll 20, and the bottom end of the sliding support 133 is slidably connected to the inner guide rails 115 so that the sliding support 133 can move axially on the fixed part 110; the top of the sliding support 133 is provided with an insertion mounting groove 134 that cooperates with the bearing pull-out part 160 or the bearing press-fit part 170, and the insertion mounting groove 134 is arranged vertically on the sliding support 133.

[0096] This configuration is because: the axial push-pull portions 130 are located at both ends of the extending direction of the fixed portion 110; the sliding supports 133 are driven to move along the axial direction of the roll 200 by the drive hydraulic cylinder 131; and the two sliding supports 133 can move synchronously in the same direction or in opposite directions by connecting the hydraulic lines in series and parallel. At the same time, the insertion mounting groove 134 provided on the top of the sliding support 133 facilitates the detachable and fixed connection between the sliding support 133 and the bearing pull-out portion 160 or the bearing press-fit portion 170.

[0097] Preferably, the insertion mounting groove 134 is a T-shaped groove, that is, the cross-section of the insertion mounting groove 134 is T-shaped.

[0098] This design is because: using a T-slot allows for a quick and detachable fixed connection between the sliding support 133 and the bearing pull-out part 160 or the bearing press-fit part 170.

[0099] In one specific embodiment, such as Figure 1 , Figure 2 , Figure 11 As shown, mounting plates 114 are fixedly installed at both ends of the fixing part 110, and two parallel outer guide rails 116 are provided on the mounting plates 114 along the axial direction; the bottom of the fixing stop part 140 is slidably connected to the outer guide rails 116 and is detachably fixedly connected to the fixing part 110 to realize the movable fixed connection between the fixing stop part 140 and the fixing part 110; the fixing stop part 140 is provided with a clearance slot 145, the radial dimension of the clearance slot 145 is larger than the radial dimension of the end bearing 230 and smaller than the radial dimension of the outer roller shell 210.

[0100] This design is based on the fact that the axial length of the outer roll shell 210 differs for rolls 200 of different specifications. External guide rails 116 are provided at both ends of the fixing part 110, and the bottom of the fixing stop part 140 is slidably connected to the external guide rails 116. This allows for a movable connection between the fixing stop part 140 and the fixing part 110, facilitating adjustment of the axial distance between the two fixing stops 140 according to the axial length of the outer roll shell 210. The detachable connection between the bottom of the fixing stop part 140 and the fixing part 110 also facilitates axial fixation of outer roll shells 210 of different lengths. An clearance slot 145 is provided on the fixing stop part 140. This clearance slot 145 allows for axial movement of the inner main shaft 220 and the end bearing 230, causing the inner main shaft 220, the end bearing 230, and the outer roll shell 210 to move axially and separate.

[0101] Preferably, the fixed stop portion 140 includes a stop plate 141, a side plate 142, and a bottom plate 143. The stop plate 141 is arranged along the width direction of the fixed portion 110, that is, perpendicular to the axis of the roll 200. The clearance slot 145 is provided on the stop plate 141. The two side plates 142 are fixedly arranged at both ends of the stop plate 141 in the width direction and are located on the side of the stop plate 141 facing the axial push-pull portion 130. The bottom plate 143 is fixedly connected to the bottom of the side plate 142 and is slidably connected to the outer guide rail 116. A connecting through hole 146 is provided on the bottom plate 143, and a threaded hole is provided on the mounting plate 114 at the end of the fixed portion 110. A connecting bolt (not shown) is provided in the connecting through hole 146, and the bottom end of the connecting bolt is threaded into the threaded hole to realize the detachable fixed connection between the fixed stop portion 140 and the fixed portion 110.

[0102] In one specific embodiment, such as Figure 1 , Figure 12 As shown, a longitudinal groove 144 is provided on the fixed stop part 140; specifically, the longitudinal groove 144 is provided on the opposite sides of the two side plates 142. The lifting stop part 150 includes a lifting baffle 151 and a lifting hydraulic cylinder 152. The bottom end of the lifting hydraulic cylinder 152 is fixedly connected to the fixed frame 111 of the fixed part 110, and the top end is fixedly connected to the lifting baffle 151, so that the lifting baffle 151 can be lifted and lowered by the extension and retraction of the lifting hydraulic cylinder 152. The lifting baffle 151 is slidably connected in the longitudinal groove 144, and the lifting baffle 151 is provided with a support groove 153 that cooperates with the clearance slot 145. The radial dimension of the support groove 153 is smaller than the radial dimension of the end bearing 230. The support groove 153 is used to provide radial support for the inner main shaft 220.

[0103] This configuration is because, during the assembly and disassembly of the end bearing 230, it is necessary to remove one end bearing 230 from the inner main shaft 220. In this embodiment, after the inner main shaft 220 and the end bearing 230 at one end are removed from the outer roller shell 210, the extension of the lifting hydraulic cylinder 152 can drive the lifting baffle 151 to rise and axially limit the end bearing 230. Combined with the axial pushing and pulling action of the axial push-pull part 130 on the inner main shaft 220, the inner main shaft 220 and the end bearing 230 move axially relative to each other, thereby separating the inner main shaft 220 from the end bearing 230.

[0104] Preferably, there are two lifting stop parts 150, which are arranged one-to-one between the fixed stop part 140 and the axial push-pull part 130.

[0105] In one specific embodiment, such as Figure 1 , Figures 3-7 As shown, the bearing pull-out portion 160 includes a cylindrical portion 161, a radial key tongue portion 162, and a first T-shaped insertion portion 163. The outer diameter of the cylindrical portion 161 is smaller than the outer diameter of the inner spindle 220. The first T-shaped insertion portion 163 is fixedly connected to one end of the cylindrical portion 161 to allow the cylindrical portion 161 to be detachably and fixedly connected to the sliding support 133 of the axial push-pull portion 130. At least two radial key tongue portions 162 are elastically extendable and retractable in the radial direction on the cylindrical portion 161, and the side of the radial key tongue portion 162 facing away from the first T-shaped insertion portion 163 is a downward pressing slope, which is used to allow the radial key tongue portion 162 to move radially. The side of the radial key tongue portion 162 facing the first T-shaped insertion portion 163 is a stop surface, which is used to allow the end bearing 230 to move axially synchronously with the bearing pull-out portion 160.

[0106] This configuration is because: after the downward pressure inclined surface contacts the end bearing 230, during the movement of the bearing pulling part 160, the radial key tongue part 162 will move radially and into the column part 161 under the pressure of the end bearing 230, thereby allowing the bearing pulling part 160 and the end bearing 230 to move axially relative to each other; when the stop surface contacts the end bearing 230, during the axial movement of the bearing pulling part 160, the radial key tongue part 162 can apply an axial force to the end bearing 230, so that the end bearing 230 moves axially synchronously with the bearing pulling part 160 and separates from the outer roller shell 210.

[0107] Specifically, when the column portion 161 is solid, multiple radial mounting holes 169 are evenly distributed around the circumference of the column portion 161, and the radial mounting holes 169 are arranged radially along the column portion 161; at the same time, mounting grooves 164 are provided on the outer circumferential surface of the column portion 161, which correspond one-to-one with the radial mounting holes 169. The axial and circumferential dimensions of the mounting grooves 164 are both larger than the radial mounting holes 169. A fixing plate 167 is installed in the mounting groove 164, and the fixing plate 167 is attached to the column by screws or bolts. The part 161 is fixedly connected, and a guide hole is provided on the fixed pressure plate 167 that is directly opposite to the radial mounting hole 169; the large end of the radial key tongue part 162 is movably disposed in the radial mounting hole 169, and the small end is movably disposed in the guide hole; a return spring 165 is provided in the radial mounting hole 169, one end of the return spring 165 abuts against the bottom of the radial mounting hole 169, and the other end abuts against the radial key tongue part 162, so that the radial key tongue part 162 can elastically expand and contract radially on the column part 161.

[0108] This is because: multiple radial mounting holes 169 are evenly distributed around the circumference of the column portion 161, and a return spring 165 is installed in the radial mounting hole. By setting a fixed pressure plate 167 in the mounting groove 164 to radially limit the radial key tongue portion 162 in the radial mounting hole 169, the radial elastic expansion and contraction of the radial key tongue portion 162 on the column portion 161 can be achieved through the elastic expansion and contraction action of the return spring 165.

[0109] Preferably, 2 to 5 radial key tongues 162 are evenly distributed around the circumference of the column portion 161.

[0110] Specifically, when the interior of the column portion 161 is hollow, the column portion 161 includes an outer cylinder 1611 and an inner column 1612. One end of the outer cylinder 1611 is connected to the first T-shaped insertion portion 163. The inner column 1612 is fitted inside the outer cylinder 1611 and is fixedly connected to the first T-shaped insertion portion 163 through a connecting rod 168. The inner column 1612 is provided with a radial mounting hole 169. A return spring 165 and two radial key tongues 162 are provided in the radial mounting hole 169. The two ends of the return spring 165 abut against the radial key tongues 162 respectively. The outer cylinder 1611 is provided with a mounting groove 164. A fixing plate 167 is provided in the mounting groove 164. The fixing plate 167 is fixedly connected to the inner column 1612 through screws 166 or bolts. The fixing plate 167 is provided with a guide hole. One end of the radial key tongue 162 passes through the guide hole.

[0111] In one specific embodiment, such as Figure 1 , Figure 9 As shown, the bearing press-fit part 170 includes a cylindrical part 171, a press-fit part 172, and a second T-shaped insertion part 173. The second T-shaped insertion part 173 is fixedly connected to one end of the cylindrical part 171 to fix the cylindrical part 171 to the sliding support 133 of the axial push-pull part 130. The press-fit part 172 is annular and fixedly connected to the other end of the cylindrical part 171. The inner diameter of the cylindrical part 171 is larger than the radial dimension of the inner main shaft 220, and the outer diameter of the press-fit part 172 is smaller than the inner diameter of the outer roller shell 210, so that the bearing press-fit part 170 can be fitted onto the inner main shaft 220 and push the end bearing 230 to move axially into the outer roller shell 210.

[0112] An embodiment provides a method for disassembling and assembling rolls for a leveling machine. This method uses the aforementioned roll disassembly and assembly device for a leveling machine and includes the following steps:

[0113] S10: Disassembly of roll 200; including:

[0114] S11: The roller 200 is hoisted onto the two support blocks 122 of the radial support section 120 by a crane, and the vertical position of the support blocks 122 of the radial support section 120 is adjusted to make the roller 200 coaxial with the drive hydraulic cylinder 131 of the axial push-pull section 130. It should be noted that when the radial dimension of the roller 200 remains unchanged, the roller 200 automatically becomes coaxial with the drive hydraulic cylinder 131 after being hoisted onto the two support blocks 122 of the radial support section 120.

[0115] S12: Insert the first T-shaped connector 163 at one end of the bearing pull-out part 160 into the insertion mounting groove 134 of the axial push-pull part 130 to achieve the connection and fixation between the bearing pull-out part 160 and the axial push-pull part 130; insert the first T-shaped connector 163 at one end of the clamping shaft (not shown, it is a solid shaft, or the bearing pull-out part 160 can be used instead) into the insertion mounting groove 134 of the other axial push-pull part 130 to achieve the connection and fixation between the clamping shaft and the axial push-pull part 130.

[0116] S13: The reverse axial extension of the driving hydraulic cylinders 131 of the two axial push-pull parts 130 drives the two sliding supports 133 to move in the opposite axial direction, thereby driving the bearing pull-out part 160 and the clamping shaft to move in opposite axial directions until the inner main shaft 220 is clamped.

[0117] S14: By extending the hydraulic cylinder 131 of the axial push-pull part 130, the drive bearing pull-out part 160 pushes one end of the inner main shaft 220 to move axially, so that the inner main shaft 220 and the outer roller shell 210 move axially relative to each other until the radial key tongue part 162 of the bearing pull-out part 160 pops out radially. At the same time, the end bearing 230 of the other end of the inner main shaft 220 moves axially to the position between the lifting stop part 150 and the axial push-pull part 130.

[0118] S15: By extending the lifting hydraulic cylinder 152, the lifting stop part 150 is driven to rise to the stop position to prevent the axial movement of the end bearing 230.

[0119] S16: By extending the drive hydraulic cylinder 131 of the other axial push-pull part 130, the top clamping shaft is driven to push the inner main shaft 220 to move axially, so that the inner main shaft 220 moves axially relative to the end bearing 230 and the outer roller shell 210, until one end bearing 230 disengages from the inner main shaft 220 and the other end bearing 230 disengages from the outer roller shell 210.

[0120] S20: Roll 200 installation; includes:

[0121] S21: By extending the lifting hydraulic cylinder 152, the lifting stop part 150 is driven to rise to the radial support position, which is used to provide radial support for the inner main shaft 220 and keep the inner main shaft 220 and the outer roller shell 210 coaxial.

[0122] S22: The two ends of the inner main shaft 220 are detachably connected to the extension shaft 180, and the extension shaft 180 is fitted with an end bearing 230.

[0123] S23: Remove the bearing pull-out part 160 and the clamping shaft from the axial push-pull part 130, and insert the second T-shaped insertion parts 173 of the two bearing press-fit parts 170 into the insertion mounting grooves 134 of the axial push-pull part 130 one by one, so as to achieve a fixed connection between the bearing press-fit part 170 and the axial push-pull part 130.

[0124] S24: By extending the hydraulic cylinders 131 of the two axial push-pull parts 130, the two bearing press-fit parts 170 are driven to move axially in opposite directions. The cylindrical part 171 of the bearing press-fit part 170 is sleeved on the extension shaft 180, and the press-fit part 172 abuts against the end bearings 230 until the two end bearings 230 are clamped.

[0125] S25: By shortening the lifting hydraulic cylinder 152, the lifting stop 150 is driven to descend to the avoidance position.

[0126] S26: By synchronously extending the drive hydraulic cylinders 131 of the two axial push-pull parts 130, the two bearing press-fit parts 170 are driven to move axially in opposite directions synchronously, so as to synchronously reinstall the two end bearings 230 into the outer roller shell 210.

[0127] S27: The inner spindle 220 is released by shortening the drive hydraulic cylinder 131 of the two axial push-pull parts 130, and is lifted off the roll 200 by the crane.

[0128] Compared with the prior art, this application has at least the following beneficial technical effects:

[0129] The device in this application eliminates the need for hammering during roll assembly and disassembly, avoids the handling of the inner spindle, and significantly improves the construction efficiency of anti-wrinkle and anti-breakage roll assembly, while reducing the labor load and construction risks.

[0130] This application uses a bearing pull-out part to disassemble the end bearings, which can avoid stress on the component points and improve the quality of maintenance; this application uses a special bearing press-fit part to install the end bearings, which can press two end bearings into the inner roller shell at the same time, thus improving construction efficiency.

[0131] The roll assembly and disassembly device in this application has a simple and reliable structure. It can be promoted in the anti-wrinkle and anti-breakage roll assembly projects of leveling machines in continuous annealing, hot-dip galvanizing and other units. It has great significance in improving labor efficiency, reducing personnel input and consumption, and ensuring the quality and safety of project implementation. Therefore, its application prospects are very good.

[0132] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A roller assembly / disassembly device for a leveling machine, wherein the roller (200) comprises an outer roller shell (210), an inner main shaft (220), and an end bearing (230), characterized in that, The disassembly / assembly device (100) includes: Fixing part (110); A radial support portion (120) is provided on the fixing portion (110) for radial support of the outer roller shell (210); Axial push-pull portion (130), two of the axial push-pull portions (130) are movably disposed on the fixed portion (110) for driving the inner spindle (220) to move axially; Fixed stop (140), two fixed stop (140) are arranged on fixed part (110) along the axial direction, for limiting the axial movement of outer roller shell (210) so that outer roller shell (210) and inner main shaft (220) can move axially relative to each other; A lifting stop (150) is provided between a fixed stop (140) and an axial push-pull part (130) for lifting and lowering, and is used to limit the axial movement of the end bearing (230) so that the inner spindle (220) and the end bearing (230) can move axially relative to each other. The bearing pull-out part (160) is detachably and fixedly connected to the axial push-pull part (130), and includes a column part (161) and a radial key tongue part (162). The radial dimension of the column part (161) is smaller than the radial dimension of the inner spindle (220). The radial key tongue part (162) is elastically and telescopically disposed on the inner spindle (220) for driving the end bearing (230) to move axially. The bearing press-fitting part (170) is detachably and fixedly connected to the axial push-pull part (130), and includes a cylindrical part (171) and a press-fitting part (172). The inner diameter of the cylindrical part (171) is larger than the radial dimension of the inner spindle. The press-fitting part (172) is disposed on the cylindrical part (171), and the radial dimension of the press-fitting part (172) is smaller than the inner diameter of the outer roller shell (210), for pushing the end bearing (230) to move axially.

2. The roller assembly / disassembly device for a leveling machine according to claim 1, characterized in that, The radial support portion (120) is two in number and is vertically and vertically mounted on the fixed portion (110); The radial support part (120) includes a lifting block (121) and a support block (122). The two ends of the lifting block (121) are slidably connected to the longitudinal slide rail (117) of the fixed part (110). The bottom of the support block (122) is connected to the lifting block (121), and the top is provided with a V-shaped support surface.

3. The roller assembly / disassembly device for a leveling machine according to claim 1, characterized in that, The axial push-pull part (130) includes a drive hydraulic cylinder (131), a fixed support (132), and a sliding support (133). The fixed support (132) is fixedly connected to the end of the fixed part (110). The fixed end of the drive hydraulic cylinder (131) is fixedly connected to the fixed support (132), and the movable end is connected to the sliding support (133). The end of the fixed part (110) is provided with an inner guide rail (115) along the axial direction. The bottom end of the sliding support (133) is slidably connected to the inner guide rail (115), and the top of the sliding support (133) is provided with an insertion mounting groove (134) that cooperates with the bearing pull-out part (160) or the bearing press-fit part (170).

4. The roller assembly / disassembly device for a leveling machine according to claim 3, characterized in that, The insertion mounting slot (134) is a T-shaped slot.

5. The roller assembly / disassembly device for a leveling machine according to claim 1, characterized in that, The end of the fixing part (110) is provided with an outer guide rail (116) along the axial direction. The bottom of the fixing stop part (140) is slidably connected to the outer guide rail (116) and is detachably fixedly connected to the fixing part (110). The fixing stop part (140) is provided with a clearance slot (145). The radial dimension of the clearance slot (145) is larger than the radial dimension of the end bearing (230) and smaller than the radial dimension of the outer roller shell (210).

6. The roller assembly / disassembly device for a leveling machine according to claim 5, characterized in that, The fixed stop (140) is provided with a longitudinal sliding groove (144); the lifting stop (150) includes a lifting baffle (151) and a lifting hydraulic cylinder (152), one end of the lifting hydraulic cylinder (152) is fixedly connected to the fixed part (110), and the other end is fixedly connected to the lifting baffle (151); the lifting baffle (151) is slidably connected in the longitudinal sliding groove (144), and the lifting baffle (151) is provided with a support groove (153) that cooperates with the clearance slot (145), and the radial dimension of the support groove (153) is smaller than the radial dimension of the end bearing (230).

7. The roller assembly / disassembly device for a leveling machine according to claim 1, characterized in that, The bearing pull-out part (160) further includes a first T-shaped plug part (163), which is fixedly connected to one end of the column part (161); the column part (161) is provided with a radial mounting hole (169); the column part (161) is provided with a mounting groove (164) connected to the radial mounting hole (169), and a fixing pressure plate (167) is installed in the mounting groove (164); one end of the radial key tongue part (162) is disposed in the radial mounting hole (169) and abuts against the return spring (165) in the radial mounting hole (169), and the other end passes through the fixing pressure plate (167) radially.

8. The roller assembly / disassembly device for a leveling machine according to claim 1, characterized in that, The bearing press-fit part (170) further includes a second T-shaped insertion part (173), which is fixedly connected to one end of the cylindrical part (171); the press-fit part (172) is annular and is fixedly connected to the other end of the cylindrical part (171).

9. A roller disassembly and assembly device for a leveling machine according to claim 1, characterized in that, The fixing part (110) includes a fixing frame (111), a traveling wheel (112) and a lifting lug (113). The traveling wheel (112) is installed at the bottom of the fixing frame (111) for horizontal movement of the fixing frame (111); the lifting lug (113) is set at the top of the fixing frame (111) for hoisting the fixing frame (111).

10. A method for disassembling and assembling rolls for a leveling machine, wherein the method uses the rolling mill disassembly and assembly device for a leveling machine as described in any one of claims 1-9, characterized in that, The method includes the following steps: S10: Disassembly of rolls (200); including: The roll (200) is hoisted onto the radial support (120); Connect the bearing pull-out part (160) and the clamping shaft to the axial push-pull part (130) one by one; The opposing axial movements of the two axial push-pull parts (130) drive the bearing pull-out part (160) and the clamping shaft to move axially in opposite directions and clamp the inner spindle (220). The axial push-pull part (130) drives the bearing pull-out part (160) to move axially, causing the inner main shaft (220) and the outer roller shell (210) to move axially relative to each other until the radial key tongue part (162) of the bearing pull-out part (160) is radially ejected. At the same time, the end bearing (230) at one end of the inner main shaft (220) moves axially between the lifting stop part (150) and the axial push-pull part (130). Raise the lifting stop (150) to the stop position; The axial push-pull part (130) drives the clamping shaft to move axially, so that the inner main shaft (220) and the end bearing (230) move axially relative to each other until one end bearing (230) is disengaged from the inner main shaft (220) and the other end bearing (230) is disengaged from the outer roller shell (210). S20: Roll (200) installation; includes: The lifting stop (150) is raised to the radial support position to provide radial support for the inner main shaft (220) and to keep the inner main shaft (220) and the outer roller shell (210) coaxial. An extension shaft (180) with end bearings (230) is connected to both ends of the inner spindle (220); Remove the bearing pull-out part (160) and the clamping shaft from the axial push-pull part (130), and connect the two bearing press-fit parts (170) to the axial push-pull part (130) one by one; By the opposite axial movement of the two axial push-pull parts (130), the two bearing press-fit parts (170) are driven to move axially in opposite directions and clamp the two end bearings (230). Lower the lifting stop (150) to the avoidance position; Through the synchronous reverse action of the two axial push-pull parts (130), the drive bearing press-fit part (170) pushes the end bearing (230) axially to move into the outer roller shell (210).

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