Multi-leaf wheel polishing assembly and polishing device

Abstract

The utility model discloses a multi-leaf wheel polishing assembly and a polishing device.The multi-leaf wheel polishing assembly comprises a polishing support, a hydraulic cylinder is fixedly installed on the polishing support, a lifting support is installed at the telescopic end of the hydraulic cylinder in a butt joint mode, swing arms are rotatably installed at the two ends of the lifting support respectively, and driven gears are rotatably installed at the lower ends of the swing arms; the end of a driven center shaft of the driven gear is provided with a multi-leaf wheel used for polishing the U-shaped rib plate in a butt joint mode. And a driving gear is rotationally installed in the middle of the polishing support and is in meshed connection with driven gears on the two sides, a pair of symmetrically-arranged arc guide grooves are further formed in the polishing support, and the arc guide grooves are used for limiting and guiding the driven center shaft, so that the driven gears and the driving gear are kept meshed all the time. According to the U rib plate polishing device, double polishing is adopted, the phenomenon of incomplete polishing can be effectively prevented, the flap wheel can still apply relatively stable polishing pressure to the U rib plate after being abraded, and therefore the relatively stable polishing effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of U-rib plate grinding, in particular to a flap wheel grinding component and a grinding device. Background Art

[0002] In the field of steel bridge manufacturing, orthotropic steel bridge decks are widely used in long-span bridges. Most orthotropic steel bridge decks for steel bridges are composed of U-shaped ribs and the bridge deck, which are connected by fillet welds, usually groove fillet welds. Due to factors such as stress concentration and welding defects, the fatigue strength of the U-shaped rib fillet welds is poor, and it is also the location where fatigue cracks are most likely to occur in steel box girders during use. Therefore, during the production of steel bridge decks, the quality of U-rib welding must be strictly controlled. Before welding, the welding area of the structural components must be thoroughly polished to remove impurities such as shop primer, oxides, oil, and moisture to ensure the mechanical properties of the weld after welding.

[0003] Currently, the area to be welded is primarily ground manually using angle grinders or emery belt grinders. Both methods require manual handheld operation and are widely used across various industries. These manual grinding methods also have significant drawbacks: low efficiency, high labor intensity, high dust and noise levels, high rates of tool damage, and poor safety performance. In particular, the quality of actual grinding varies greatly from operator to operator, and factors such as the operator's skills, mentality, and physical condition can significantly impact work quality, leading to incomplete or irregular grinding and damage to the parent material.

[0004] For example, the utility model patent with authorization announcement number CN218891611U discloses automatic grinding equipment for steel structure bridge plate units. The above solution can not only realize the simultaneous grinding of multiple areas to be welded, but also avoid close contact between operators and grinding equipment, thereby improving the grinding quality and efficiency, and greatly reducing the labor intensity of workers and improving the working environment.

[0005] However, the above scheme can only perform single grinding in the direction of steel plate transportation, and the applied grinding pressure is mainly adjusted by the expansion and contraction of the spring. When the grinding component is worn, incomplete grinding is likely to occur; in addition, the expansion and contraction range of the spring is relatively large, which makes it difficult to maintain the grinding pressure applied by the grinding component on the steel plate within a reasonable range, and the grinding effect on the steel plate is relatively not stable enough. Utility Model Content

[0006] The purpose of the present utility model is to provide a flap wheel grinding assembly and a grinding device to solve the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A flap wheel grinding assembly comprises a grinding bracket, wherein a hydraulic cylinder is fixedly mounted on the grinding bracket, a lifting bracket is butt-jointedly mounted on the telescopic end of the hydraulic cylinder, swing arms are rotatably mounted on both ends of the lifting bracket, a driven gear is rotatably mounted on the lower end of the swing arm, and a flap wheel for grinding U-rib plates is butt-jointedly mounted on the end of the driven central axis of the driven gear;

[0009] A driving gear is rotatably installed in the middle of the polishing bracket, and the driving gear is simultaneously engaged with the driven gears on both sides. A pair of symmetrically arranged arc guide grooves are also provided on the polishing bracket. The arc guide grooves are used to limit and guide the driven central axis so that the driven gear and the driving gear always remain engaged.

[0010] Preferably, it also includes a pressure sensor, which is installed on the oil supply pipeline of the hydraulic cylinder. A pressure regulating valve for regulating the internal hydraulic pressure of the hydraulic cylinder is also installed on the oil supply pipeline of the hydraulic cylinder. The pressure sensor and the pressure regulating valve are both electrically connected to the controller.

[0011] Preferably, the driven central shaft is also rotatably mounted with a guide wheel, and the driven central shaft is mounted in the circular arc guide groove through the guide wheel, so that the driven central shaft of the driven gear can move flexibly in the circular arc guide groove.

[0012] Preferably, a driving motor is also installed on the polishing bracket, and the driving motor is drivingly connected to the driving central shaft of the driving gear through a transmission assembly.

[0013] Preferably, the transmission assembly includes a driving pulley, a driven pulley and a transmission belt, the transmission belt is sleeved between the driving pulley and the driven pulley, the driving pulley is docked and installed at the end of the drive motor output shaft, and the driven pulley is docked and installed at the end of the driving center shaft.

[0014] A flap wheel grinding device includes a conveyor frame on which a conveyor roller for conveying a U-rib plate is rotatably mounted, an upper grinding mechanism for grinding the upper surface of the U-rib plate, and a lower grinding mechanism for grinding the lower surface of the U-rib plate, wherein the upper grinding mechanism and the lower grinding mechanism are grinding mechanisms of the same structure;

[0015] The grinding mechanism includes a grinding frame and a pair of flap wheel grinding assemblies. The two flap wheel grinding assemblies are arranged in a transverse distribution. A centering drive mechanism is installed on the grinding frame. The centering drive mechanism is used to drive the two flap wheel grinding assemblies to move toward or away from each other and adjust the transverse distance between the two flap wheel grinding assemblies.

[0016] Preferably, the centering drive mechanism adopts a pair of screw centering mechanisms, each screw centering mechanism includes a pair of centering supports fixedly mounted on the grinding frame, a centering guide rod is fixedly mounted between the centering supports, a centering screw is rotatably mounted between the centering supports, and the centering screw is distributed with forward thread segments and reverse thread segments;

[0017] Both ends of the grinding bracket of each flap wheel grinding assembly are slidably fitted on the corresponding centering guide rod through a guide seat; the guide seat at the end of one of the grinding brackets is fitted on the corresponding forward thread segment through a threaded hole, and the guide seat at the end of the other grinding bracket is fitted on the corresponding reverse thread segment through a threaded hole; the screw centering mechanism also includes a driving element for driving the centering screw to rotate.

[0018] A flap wheel grinding device includes a conveyor frame on which a conveyor roller for conveying a U-rib plate is rotatably mounted, an upper grinding mechanism for grinding the upper surface of the U-rib plate, and a lower grinding mechanism for grinding the lower surface of the U-rib plate, wherein the upper grinding mechanism and the lower grinding mechanism are grinding mechanisms of the same structure;

[0019] The grinding mechanism includes a grinding frame and a pair of flap wheel grinding assemblies, the two flap wheel grinding assemblies are arranged in a transverse distribution, and a centering drive mechanism is installed on the grinding frame, which is used to drive the two flap wheel grinding assemblies to move toward or away from each other, and adjust the transverse spacing between the two flap wheel grinding assemblies; the active center shaft is also provided with a spline hole, and a spline long shaft is rotatably installed on the grinding frame, and the two ends of the spline long shaft are axially movably inserted and fitted in the corresponding spline holes; the grinding frame is also equipped with a synchronous drive motor, and the synchronous drive motor is connected to the spline long shaft through a synchronous transmission mechanism.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. During the transportation of the U-rib plate, the two flap wheels in the feeding direction can grind the same area to be welded in turn. The double grinding can effectively prevent the occurrence of incomplete grinding.

[0022] 2. The hydraulic cylinder in the present invention can adjust the height of the flap wheels on both sides simultaneously through the lifting bracket and the swing arm, so as to facilitate the grinding of U-ribs of different thicknesses, and the adjustment process does not affect the rotating grinding operation of the flap wheels. On the other hand, the cooperation of the pressure sensor, the hydraulic cylinder, the pressure regulating valve and the controller can ensure that the flap wheels can still apply relatively stable grinding pressure to the U-ribs even after wear occurs, thereby ensuring a relatively stable grinding effect.

[0023] 3. The utility model can drive the two flap wheel grinding assemblies to move toward or away from each other through the central driving mechanism, thereby adjusting the lateral distance between the two flap wheel grinding assemblies to meet the grinding work of U-ribs of different widths;

[0024] 4. In the present invention, the spline long shaft and the spline hole of the active center shaft are spline-matched. The spline long shaft can make relative axial movement with the active center shaft along the axial direction. The entire driving process does not affect the spacing adjustment between the two flap wheel grinding assemblies. The present invention can simultaneously drive four flap wheels to rotate through a synchronous drive motor. Two flap wheels form a group, which can grind the area to be welded at the corresponding position of the U rib plate. The number of motor assemblies is relatively less, and the overall assembly is relatively lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a flap wheel grinding assembly from a first perspective;

[0026] Figure 2 A schematic diagram of the three-dimensional structure of a flap wheel grinding assembly from a second viewing angle;

[0027] Figure 3 A schematic diagram of the cross-section structure of a flap wheel grinding assembly;

[0028] Figure 4 A schematic diagram of the three-dimensional structure of a flap wheel grinding assembly with the grinding bracket hidden;

[0029] Figure 5 Schematic diagram of the three-dimensional structure of a flap wheel grinding device embodiment 3;

[0030] Figure 6 This is a schematic side view of the structure of a flap wheel grinding device according to Example 3;

[0031] Figure 7 This is a schematic diagram of the three-dimensional structure of the upper grinding mechanism in Example 3 of a flap wheel grinding device;

[0032] Figure 8 This is a schematic diagram of the top view of a flap wheel grinding device embodiment 4.

[0033] In the figure: 100, U rib; 200, lower grinding mechanism; 300, upper grinding mechanism; 400, flap wheel grinding assembly; 1, conveyor frame; 11, conveyor roller; 2, grinding frame; 21, centering support; 22, centering screw; 23, driving element; 24, centering guide rod; 25, splined long shaft; 251, synchronous pulley 2; 26, synchronous drive motor; 261, synchronous pulley 1; 262, synchronous drive belt; 3, grinding bracket; 31, guide seat; 32, arc guide groove; 4, drive motor; 5, driving gear; 51, driving center shaft; 52, driven pulley; 6, driven gear; 61, driven center shaft; 62, guide wheel; 7, hydraulic cylinder; 8, lifting bracket; 81, swing arm; 9, flap wheel. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Embodiment 1: A flap wheel grinding assembly, including a grinding bracket 3, on which a hydraulic cylinder 7 is fixedly mounted, and a lifting bracket 8 is dockedly mounted at the telescopic end of the hydraulic cylinder 7, and swing arms 81 are rotatably mounted at both ends of the lifting bracket 8, and a driven gear 6 is rotatably mounted at the lower end of the swing arm 81, and a flap wheel 9 for grinding the U-rib 100 is dockedly mounted at the end of the driven center shaft 61 of the driven gear 6; a driving gear 5 is rotatably mounted at the middle part of the grinding bracket 3, and the driving gear 5 is simultaneously meshed with the driven gears 6 on both sides, and a pair of symmetrically arranged circular arc guide grooves 32 are also provided on the grinding bracket 3. In the present utility model, the central axis of the circular arc guide groove 32 coincides with the central axis of the driving gear 5, and the circular arc guide groove 32 can be used to limit and guide the driven center shaft 61, so that the driven gear 6 and the driving gear 5 always remain meshed.

[0036] The working principle of the embodiment of the utility model is as follows: the driving gear 5 is driven to rotate by the power element, and the driving gear 5 can simultaneously drive the driven gears 6 on both sides to rotate. The driven gears 6 can drive the corresponding flap wheels 9 to rotate using their own driven central shafts 61. The rotating flap wheels 9 can grind the area to be welded of the U-rib 100;

[0037] When the height position of the central axis of the flap wheel 9 needs to be adjusted, the hydraulic cylinder 7 will drive the lifting bracket 8 to rise or fall. The lifting bracket 8 can drive the flap wheels 9 on both sides to rise or fall at the same time through the swing arms 81 on both sides. Under the limiting guidance of the driven central axis 61 by the arc guide groove 32, the driven gear 6 and the driving gear 5 can always maintain engagement, so that the height position adjustment of the flap wheel 9 does not affect its own rotation and grinding operation.

[0038] As a further solution, in order to keep the working pressure applied by the flap wheel 9 on the U-rib 100 relatively stable, the embodiment of the utility model also includes a pressure sensor, which is installed on the oil supply pipeline of the hydraulic cylinder 7, and a pressure regulating valve for adjusting the internal hydraulic pressure of the hydraulic cylinder 7 is also installed on the oil supply pipeline of the hydraulic cylinder 7. The pressure sensor and the pressure regulating valve are both electrically connected to the controller.

[0039] During the grinding operation, when the flap wheel 9 is worn, the outer diameter of the flap wheel 9 will gradually decrease, and the pressure detected by the pressure sensor will also gradually decrease. When the reduced pressure exceeds the set range, the controller controls the action of the pressure regulating valve to adjust the internal hydraulic pressure of the hydraulic cylinder 7, so that the pressure applied by the hydraulic cylinder 7 to the lifting bracket 8 remains relatively stable, thereby ensuring a relatively stable grinding effect.

[0040] On the one hand, the hydraulic cylinder 7 in the present invention can simultaneously adjust the height position of the flap wheels 9 on both sides through the lifting bracket 8 and the swing arm 81, so as to facilitate the grinding of U-ribs of different thicknesses, and the adjustment process does not affect the rotational grinding operation of the flap wheels 9; on the other hand, through the cooperation of the pressure sensor, the hydraulic cylinder 7, the pressure regulating valve and the controller, the flap wheels 9 can still apply a relatively stable grinding pressure to the U-rib 100 after wear occurs, thereby ensuring a relatively stable grinding effect; in addition, during the transportation of the U-rib 100, the two flap wheels 9 in the feeding direction can grind the same area to be welded in turn, and the use of double grinding can effectively prevent the occurrence of incomplete grinding.

[0041] As a further solution, in order to facilitate the flexible movement of the driven center shaft 61 of the driven gear 6 in the circular arc guide groove 32, the driven center shaft 61 is also rotatably installed with a guide wheel 62, and the driven center shaft 61 is installed in the circular arc guide groove 32 through the guide wheel 62.

[0042] See also Figures 1 to 4 , Example 2: A flap wheel grinding assembly, which differs from Example 1 in that a drive motor 4 is further installed on the grinding bracket 3, and the drive motor 4 is driven and connected to the active central shaft 51 of the active gear 5 through a transmission assembly.

[0043] Among them, the transmission assembly includes a driving pulley 41, a driven pulley 52 and a transmission belt. The transmission belt is installed between the driving pulley 41 and the driven pulley 52. The driving pulley 41 is docked and installed at the end of the output shaft of the driving motor 4, and the driven pulley 52 is docked and installed at the end of the driving center shaft 51.

[0044] The working principle of the embodiment of the present utility model is: the drive motor 4 is used as a power element, and the drive motor 4 can drive the active central shaft 51 to rotate through the transmission assembly. The active central shaft 51 can simultaneously drive the two flap wheels 9 to rotate synchronously by utilizing the engagement between the driven gear 6 and the driving gear 5.

[0045] See also Figures 5-7 Embodiment 3: A flap wheel grinding device comprises a conveyor frame 1, on which a conveyor roller 11 for conveying a U-rib plate 100 is rotatably mounted. The device is characterized in that it further comprises an upper grinding mechanism 300 for grinding the upper surface of the U-rib plate 100 and a lower grinding mechanism 200 for grinding the lower surface of the U-rib plate 100. The upper grinding mechanism 300 and the lower grinding mechanism 200 are grinding mechanisms of the same structure.

[0046] The grinding mechanism includes a grinding frame 2 and a pair of flap wheel grinding assemblies 400 described in Example 2. The two flap wheel grinding assemblies 400 are arranged in a horizontal distribution. A centering drive mechanism is installed on the grinding frame 2. The centering drive mechanism is used to drive the two flap wheel grinding assemblies 400 to move toward or away from each other, and adjust the lateral spacing between the two flap wheel grinding assemblies 400.

[0047] The working principle of Example 3 of the present utility model is: the two flap wheel grinding assemblies 400 can be driven to move toward or away from each other through the middle driving mechanism, thereby adjusting the lateral distance between the two flap wheel grinding assemblies 400 to meet the grinding work of U-ribs of different widths.

[0048] As a specific solution, the centering drive mechanism adopts a pair of screw centering mechanisms, each screw centering mechanism includes a pair of centering supports 21 fixedly mounted on the grinding frame 2, a centering guide rod 24 is fixedly mounted between the centering supports 21, and a centering screw 22 is rotatably mounted between the centering supports 21, and the centering screw 22 is distributed with a forward thread segment and a reverse thread segment;

[0049] Both ends of the grinding bracket 3 of each flap wheel grinding assembly 400 are slidably fitted on the corresponding centering guide rod 24 through a guide seat 31; the guide seat 31 at the end of one of the grinding brackets 3 is fitted on the corresponding forward thread segment through a threaded hole, and the guide seat 31 at the end of the other grinding bracket 3 is fitted on the corresponding reverse thread segment through a threaded hole; the screw centering mechanism also includes a driving element 23 for driving the centering screw 22 to rotate.

[0050] Since a large number of U-ribs 100 of the same model are used in steel bridges, frequent adjustment of the centering drive mechanism is unnecessary. Therefore, the drive element 23 can be specifically an adjustment handwheel. Manually turning the adjustment handwheel drives the centering screw 22 to rotate. Since the two flap grinding assemblies 400 respectively drive the forward and reverse threaded sections docked on the centering screw 22, the rotating centering screw 22 drives the two flap grinding assemblies 400 to move toward or away from each other, thereby adjusting the lateral spacing between the two flap grinding assemblies 400. Of course, the drive element 23 can also be an adjustment motor to electrically drive the centering screw 22.

[0051] See also Figure 8 Embodiment 4: A flap wheel grinding device comprises a conveyor frame 1, on which a conveyor roller 11 for conveying a U-rib plate 100 is rotatably mounted. The device is characterized in that it further comprises an upper grinding mechanism 300 for grinding the upper surface of the U-rib plate 100 and a lower grinding mechanism 200 for grinding the lower surface of the U-rib plate 100. The upper grinding mechanism 300 and the lower grinding mechanism 200 are grinding mechanisms of the same structure.

[0052] The grinding mechanism includes a grinding frame 2 and a pair of flap wheel grinding assemblies 400 described in Example 1. The two flap wheel grinding assemblies 400 are arranged in a transverse distribution. A centering drive mechanism is installed on the grinding frame 2. The centering drive mechanism is used to drive the two flap wheel grinding assemblies 400 to move toward or away from each other and adjust the transverse distance between the two flap wheel grinding assemblies 400.

[0053] The active central shaft 51 is further provided with a spline hole. A splined long shaft 25 is rotatably mounted on the polishing frame 2. The two ends of the splined long shaft 25 are axially movable and inserted into corresponding spline holes. A synchronous drive motor 26 is also mounted on the polishing frame 2. The synchronous drive motor 26 is driven and connected to the splined long shaft 25 via a synchronous transmission mechanism. The synchronous transmission mechanism may include a first synchronous pulley 261, a second synchronous pulley 251, and a synchronous transmission belt 262. The synchronous transmission belt 262 is sleeved between the first synchronous pulley 261 and the second synchronous pulley 251. The first synchronous pulley 261 is docked and mounted on the end of the output shaft of the synchronous drive motor 26, and the second synchronous pulley 251 is docked and mounted on the splined long shaft 25.

[0054] The working principle of the fourth embodiment of the present invention is as follows: during the grinding operation, the synchronous drive motor 26 drives the spline long shaft 25 to rotate through the synchronous transmission mechanism, and the rotating spline long shaft 25 can simultaneously drive the active central shafts 51 of the two flap wheel grinding assemblies 400 to rotate, and each active central shaft 51 can drive the corresponding two flap wheels 9 to rotate;

[0055] Since the spline long shaft 25 and the spline hole of the active center shaft 51 are spline-matched, the spline long shaft 25 can make relative axial movement with the active center shaft 51 along the axial direction. The entire driving process does not affect the spacing adjustment between the two flap wheel grinding assemblies 400. The utility model can simultaneously drive four flap wheels 9 to rotate through a synchronous drive motor 26. Two flap wheels 9 form a group, which can grind the area to be welded at the corresponding position of the U rib 100. Compared with Example 3, the number of motor assemblies is relatively less, and the overall assembly is relatively lower.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A flap wheel grinding assembly, comprising a grinding bracket (3), characterized in that: A hydraulic cylinder (7) is fixedly mounted on the grinding bracket (3); a lifting bracket (8) is butt-jointed with the telescopic end of the hydraulic cylinder (7); swing arms (81) are rotatably mounted on both ends of the lifting bracket (8); a driven gear (6) is rotatably mounted on the lower end of the swing arm (81); and a flap wheel (9) for grinding the U-rib (100) is butt-jointed with the end of the driven central axis (61) of the driven gear (6); A driving gear (5) is rotatably mounted in the middle of the polishing bracket (3), and the driving gear (5) is simultaneously meshed and connected with the driven gears (6) on both sides. A pair of symmetrically arranged circular arc guide grooves (32) are also provided on the polishing bracket (3), and the circular arc guide grooves (32) are used to limit and guide the driven central axis (61), so that the driven gear (6) and the driving gear (5) always maintain meshing.

2. The flap wheel grinding assembly according to claim 1, characterized in that: It also includes a pressure sensor, which is installed on the oil supply pipeline of the hydraulic cylinder (7). A pressure regulating valve for regulating the internal hydraulic pressure of the hydraulic cylinder (7) is also installed on the oil supply pipeline of the hydraulic cylinder (7). The pressure sensor and the pressure regulating valve are both electrically connected to the controller.

3. The flap wheel grinding assembly according to claim 1, characterized in that: The driven central shaft (61) is also rotatably mounted with a guide wheel (62), and the driven central shaft (61) is mounted in the circular arc guide groove (32) through the guide wheel (62).

4. The flap wheel grinding assembly according to claim 1, characterized in that: A driving motor (4) is also mounted on the polishing bracket (3), and the driving motor (4) is drivingly connected to the driving central shaft (51) of the driving gear (5) through a transmission assembly.

5. The flap wheel grinding assembly according to claim 4, characterized in that: The transmission assembly comprises a driving pulley (41), a driven pulley (52) and a transmission belt, wherein the transmission belt is sleeved between the driving pulley (41) and the driven pulley (52), the driving pulley (41) is docked and mounted on the end of the output shaft of the driving motor (4), and the driven pulley (52) is docked and mounted on the end of the driving central shaft (51).

6. A flap wheel grinding device, comprising a conveyor frame (1), on which a conveyor roller (11) for conveying a U-rib plate (100) is rotatably mounted, characterized in that: It also includes an upper grinding mechanism (300) for grinding the upper surface of the U-rib plate (100) and a lower grinding mechanism (200) for grinding the lower surface of the U-rib plate (100), wherein the upper grinding mechanism (300) and the lower grinding mechanism (200) have the same structure. The grinding mechanism includes a grinding frame (2) and a pair of flap wheel grinding assemblies (400) according to any one of claims 4-5, wherein the two flap wheel grinding assemblies (400) are arranged in a transverse distribution, and a centering drive mechanism is installed on the grinding frame (2), and the centering drive mechanism is used to drive the two flap wheel grinding assemblies (400) to move toward or away from each other, and adjust the transverse distance between the two flap wheel grinding assemblies (400).

7. The flap wheel grinding device according to claim 6, characterized in that: The centering drive mechanism adopts a pair of screw centering mechanisms, each screw centering mechanism comprises a pair of centering supports (21) fixedly mounted on the grinding frame (2), a centering guide rod (24) fixedly mounted between the centering supports (21), a centering screw (22) rotatably mounted between the centering supports (21), and a forward thread segment and a reverse thread segment distributed on the centering screw (22); Both ends of the grinding bracket (3) of each flap wheel grinding assembly (400) are slidably fitted on the corresponding centering guide rod (24) through the guide seat (31); The guide seat (31) at the end of one grinding bracket (3) is fitted on the corresponding forward thread segment through a threaded hole, and the guide seat (31) at the end of the other grinding bracket (3) is fitted on the corresponding reverse thread segment through a threaded hole. The screw centering mechanism further comprises a driving element (23) for driving the centering screw (22) to rotate.

8. A flap wheel grinding device, comprising a conveyor frame (1), on which a conveyor roller (11) for conveying a U-rib plate (100) is rotatably mounted, characterized in that: It also includes an upper grinding mechanism (300) for grinding the upper surface of the U-rib plate (100) and a lower grinding mechanism (200) for grinding the lower surface of the U-rib plate (100), wherein the upper grinding mechanism (300) and the lower grinding mechanism (200) have the same structure. The grinding mechanism comprises a grinding frame (2) and a pair of flap wheel grinding assemblies (400) according to any one of claims 1 to 3, wherein the two flap wheel grinding assemblies (400) are arranged in a transverse distribution, and a centering drive mechanism is installed on the grinding frame (2), and the centering drive mechanism is used to drive the two flap wheel grinding assemblies (400) to move toward or away from each other, and adjust the transverse distance between the two flap wheel grinding assemblies (400); The driving center shaft (51) of the driving gear (5) is also provided with a spline hole, and a spline long shaft (25) is rotatably mounted on the polishing frame (2), with both ends of the spline long shaft (25) being axially movable and inserted into the corresponding spline holes; A synchronous drive motor (26) is also installed on the polishing frame (2), and the synchronous drive motor (26) is drivingly connected to the spline long shaft (25) through a synchronous transmission mechanism.

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