A high flatness grinding device for steel strip

Abstract

The application provides a high-flatness grinding device for steel belt, which comprises a rack placed on a horizontal plane, a laser engraving mechanism installed at one end of the rack to form a feeding end, a feeding mechanism connected to the side of the laser engraving mechanism for conveying the steel belt, the feeding mechanism can drive the steel belt to move along the direction of the rack by rotating, a grinding mechanism installed at the middle section of the rack, the steel belt flows from the feeding mechanism to the grinding mechanism, the grinding mechanism comprises a plurality of grinding rings, the plurality of grinding rings are divided into two rows, the grinding rings in each row are arranged at intervals and abut against the grinding rings in the other row, each grinding ring rotates against the surface of the steel belt to grind the steel belt, and each row of grinding rings is connected with a leveling structure, the leveling structure abuts against the surface of the grinding ring in contact with the steel belt to detect the flatness of the grinding ring and level it. The high-flatness grinding device for steel belt simplifies the structure, improves the flatness of the surface of the steel belt and the grinding quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel strip processing, and particularly relates to a high-flatness grinding device for steel strip. BACKGROUND

[0002] As a basic industrial material, the steel strip is widely used in the fields of automobile manufacturing, precision electronics, household appliance shell and packaging, etc., and the surface flatness of the steel strip directly affects the subsequent processing quality and product performance. In the prior art, the surface of the steel strip is processed by means of abrasive belt grinding, abrasive roll grinding and abrasive disc grinding, wherein the methods of abrasive belt grinding and abrasive roll grinding can process the steel strip on both sides, but can cause vibration of the steel strip and cannot be used for high-precision processing.

[0003] When high-precision processing is required on the surface of the steel strip, the abrasive disc grinding is usually used, and the disc surface of the abrasive disc is pressed against the surface of the steel strip for grinding. This method requires high requirements for the incoming steel strip, and the steel strip needs to be pretreated by rough grinding and fine grinding to ensure the flatness of the surface of the steel strip and make the surface of the steel strip fully contact with the abrasive disc. However, the abrasive disc will be worn to a certain extent after long-time grinding, and the worn abrasive disc will form grinding marks on the steel strip, which not only affects the appearance of the steel strip, but also damages the flatness of the surface of the steel strip and the internal stress distribution, thereby reducing the product quality. SUMMARY

[0004] In view of the above, it is necessary to provide a rotor magnetizing device which can simplify the structure and improve the magnetizing precision.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] A high-flatness grinding device for steel strip, comprising: a rack, the rack is placed on a horizontal plane, one end of the rack is provided with a laser engraving mechanism to form an inlet end, and the laser engraving mechanism is used to ablate the uneven surface of the steel strip; an inlet mechanism, the inlet mechanism is arranged at the rear end of the laser engraving mechanism along the moving direction of the steel strip, and is used to convey the steel strip to move in a wave shape to facilitate the removal of stress of the steel strip, the inlet mechanism comprises a sand roll, the sand roll is abutted on the surface of the steel strip and rotates to remove the ablation impurities on the surface of the steel strip; a grinding mechanism, the grinding mechanism is installed in the middle section of the rack, and comprises a grinding frame, a grinding table and a grinding ring, the grinding frame is arranged on the top surface of the rack, the grinding table is arranged below the grinding frame, and the grinding ring is vertically arranged on the grinding frame and corresponds to the grinding table below; a leveling structure, the leveling structure is arranged in two groups, each group of leveling structure comprises a leveling frame and a leveling group, the leveling frame is arranged on the grinding frame and extends to be connected with the grinding table, and the leveling group is arranged on the leveling frame and arranged along the radial direction of the grinding ring.

[0007] Further, the laser engraving mechanism comprises a mounting rod and two laser emitters, the mounting rod is arranged in a door shape and comprises two vertical legs and a crossbeam connecting the two legs, the two laser emitters are arranged in a stack below the crossbeam, the laser emitting windows of the two laser emitters are oppositely arranged, and the steel belt is arranged in the gap between the two laser emitters.

[0008] Further, the feeding mechanism comprises two fixed plates and a plurality of conveying shafts rotatably arranged between the two fixed plates, the two fixed plates are in abutment with the mounting rod, each of the fixed plates is provided with two rows of shaft holes in the upper and lower sides, each of the conveying shafts is rotatably arranged in each of the shaft holes, the steel belt is arranged around each of the conveying shafts, so that the steel belt is conveyed in a wave shape in the feeding mechanism; the shaft end of each of the conveying shafts is sleeved with a belt connected with a sand roller, and the diameter of each of the conveying shafts is greater than that of the sand roller, so that the rotation speed of the sand roller is greater than that of the conveying shaft.

[0009] Further, each of the sand rollers is further provided with a dust suction pipe, the two ends of the dust suction pipe are respectively arranged in the two fixed plates, one end of the dust suction pipe extends out of the fixed plate to form an air suction end, a rotatable air suction fan is arranged in the air suction end, the air suction fan is connected with the conveying shaft, the conveying shaft drives the air suction fan to rotate, and the air suction fan extracts the air mixed with impurities in the dust suction pipe.

[0010] Further, the grinding frame comprises a horizontally arranged mounting plate and support rods connected to the four corners of the bottom surface of the mounting plate, two support rods arranged along the width direction of the steel belt are arranged as a group, a limiting shaft is arranged between each group of support rods, the steel belt is changed in conveying direction by being wound around the limiting shaft, and the end portions of the two limiting shafts are connected with motors, the motors drive the limiting shafts to rotate.

[0011] Further, the grinding table comprises an oil storage chamber, the oil storage chamber contains lubricating oil, the top surface of the grinding table is provided with fences protruding from both sides parallel to the moving direction of the steel belt, and flow grooves are arranged between the two fences and on the top surface of the grinding table in a crisscross manner to allow the lubricating oil to flow.

[0012] Further, the grinding frame further comprises two rows of grinding holes, the two rows of grinding holes are arranged in a staggered manner, each of the grinding holes is provided with a grinding sleeve, each of the grinding sleeves is in abutment with the grinding sleeve of the other row, each of the grinding sleeves is provided with a pressure cavity, the pressure cavity is connected with an oil supply pipe, the oil supply pipe is in communication with the oil storage chamber, a grinding ring is movably arranged in the pressure cavity close to the steel belt, and a constant pressure valve is arranged in the middle of the grinding ring, one end of the constant pressure valve is in communication with the pressure cavity, and the other end of the constant pressure valve is inclined towards the surface of the steel belt.

[0013] Further, the leveling frame comprises a leveling cavity, one end of the leveling cavity is provided with an opening in communication with the grinding table, the lubricating oil on the grinding table flows into the leveling cavity, the leveling cavity is provided with a drainage port, a filter screen is arranged in the drainage port, and a return pipe is connected to the lower end of the drainage port, the other end of the return pipe is in communication with the oil storage chamber.

[0014] Further, the leveling group comprises a leveling block fixed in the leveling cavity, two oil liquid cavities parallel to each other are formed in the length direction of the leveling block, the opening ends of the two oil liquid cavities are both directed to the grinding ring, the opening end of one of the oil liquid cavities is provided with a plurality of lifting pipes, and a communication port is arranged on the side wall close to the other oil liquid cavity, so that the two oil liquid cavities are communicated with each other, and the opening end of the other oil liquid cavity extends a baffle to block the oil liquid in the oil liquid cavity from flowing out.

[0015] Further, the leveling group further comprises a plurality of detection columns and a scraper, the plurality of detection columns are inserted into the plurality of lifting pipes and upwardly extend to abut against the grinding ring, the scraper is arranged in a "mouth" shape, the scraper is sleeved on the baffle and corresponds to the communication port, the top surface of the scraper is close to the grinding ring and has a gap, the oil liquid in the oil liquid cavity flows out from the communication port to drive the scraper to rise relative to the baffle.

[0016] The beneficial effects of the present application are:

[0017] 1. When the steel belt is fed from the feeding end of the rack, it first passes through the laser engraving mechanism to be ablated by laser to make the surface uneven, then enters the feeding mechanism and is released from stress by rotating around the conveying shaft, and contacts the sand roller to grind off the impurities generated by laser ablation.

[0018] 2. The grinding disc grinds the steel belt against the grinding table, and the lubricating liquid in the flow groove is adsorbed on the bottom surface of the steel belt, which can reduce the friction between the steel belt and the top surface of the grinding table and absorb the heat generated during grinding, and the lubricating oil adsorbs the steel belt on the top surface of the grinding table to avoid vibration during grinding.

[0019] 3. The leveling group is arranged on the bottom surface of the grinding ring to support the horizontal rotation of the grinding ring, place the grinding ring which is inclined or jumps due to uneven stress, and the detection column can detect the change of the bottom surface of the grinding ring to control the scraper to grind the bottom surface of the grinding ring for leveling. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the high flatness grinding device for steel belt;

[0021] Figure 2 It is another axonometric view of the high flatness grinding device for steel belt;

[0022] Figure 3 It is a sectional view of the high flatness grinding device for steel belt;

[0023] Figure 4 It is a back axonometric view of the high flatness grinding device for steel belt;

[0024] Figure 5 It is an internal structure view of the leveling group.

[0025] BRIEF DESCRIPTION OF DRAWINGS:

[0026] 1. Frame; 11. Laser engraving mechanism; 111. Mounting rod; 112. Laser emitter; 2. Feeding mechanism; 21. Fixing plate; 22. Conveyor shaft; 23. Sanding roller; 24. Dust suction pipe; 3. Grinding mechanism; 31. Grinding frame; 311. Limiting shaft; 312. Motor; 313. Grinding sleeve; 314. Pressure chamber; 32. Grinding table; 321. Oil storage chamber; 322. Enclosure; 323. Flow channel; 33. Drive source; 34. Grinding ring; 35. Constant pressure valve; 4. Leveling structure; 41. Leveling frame; 411. Leveling cavity; 412. Return pipe; 42. Leveling group; 421. Leveling block; 4211. Oil cavity; 4212. Lifting pipe; 422. Detection column; 423. Scraper. Detailed Implementation

[0027] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0028] like Figures 1 to 3 As shown, this embodiment of the invention provides a high-flatness grinding device for steel strip, including a frame 1 placed on a horizontal plane. A laser engraving mechanism 11 is installed at one end of the frame 1, forming a feeding end. A feeding mechanism 2 for conveying steel strip is connected to the side of the laser engraving mechanism 11. The steel strip can be moved along the direction set by the rotation of the feeding mechanism 2. A grinding mechanism 3 is installed in the middle section of the frame 1, and the steel strip flows from the feeding mechanism 2 to the grinding mechanism 3. The grinding mechanism 3 includes a plurality of grinding rings 34, which are divided into two rows. Each row of grinding rings 34 is spaced apart and abuts against the grinding rings 34 in the other row. Each grinding ring 34 rotates against the surface of the steel strip to grind the steel strip. Each row of grinding rings 34 is connected to a leveling structure 4, which abuts against the surface of the grinding ring 34 in contact with the steel strip to detect the flatness of the grinding ring 34 and level it.

[0029] The laser engraving mechanism 11 includes a mounting rod 111 and two laser emitters 112. The mounting rod 111 is arranged in a gate shape and includes two vertical legs and a crossbeam connecting the two legs. The two legs are fixed on both sides of the feed end and are parallel to the width direction of the steel strip. The two laser emitters 112 are stacked at intervals under the crossbeam. The laser emission windows of the two laser emitters 112 are arranged opposite each other. The steel strip passes through the gap between the two laser emitters 112. Each laser emitter 112 emits a laser to ablate the surface of the adjacent steel strip, thereby improving the flatness of the steel strip surface.

[0030] The feeding mechanism 2 comprises two fixed plates 21 and a plurality of conveying shafts 22 rotatably arranged between the two fixed plates 21, the two fixed plates 21 are respectively abutted with the two legs of the mounting rod 111 and extend along the direction in which the steel belt moves; a plurality of shaft holes are formed in each fixed plate 21, the number of the shaft holes is the same as the number of the conveying shafts 22, each conveying shaft 22 is rotatably arranged in each shaft hole, and the steel belt is arranged around each conveying shaft 22, so that the steel belt is conveyed in a wave shape in the feeding mechanism 2. In addition, a sand roller 23 is arranged beside each conveying shaft 22 and abuts against the surface of the steel belt, the steel belt is arranged in the gap between the conveying shaft 22 and the sand roller 23, the end of the sand roller 23 extends out of the fixed plate 21 and is sleeved with a belt connected with the end of the conveying shaft 22. The diameter of the sand roller 23 is smaller than the diameter of the conveying shaft 22, so that when the sand roller 23 is driven to rotate by the belt, the rotating speed of the sand roller 23 is greater than the rotating speed of the conveying shaft 22, and under the action of the speed difference, the sand roller 23 grinds and removes the ablation impurities attached to the surface of the steel belt and eliminates the stress of the steel belt.

[0031] Further, in order to avoid the impurities removed by the sand roller 23 from being scattered into the air, a dust suction pipe 24 is arranged beside each sand roller 23, and the two ends of the dust suction pipe 24 are respectively arranged in the two fixed plates 21, one end of the dust suction pipe 24 extends out of the fixed plate 21 to form an air suction end, a rotatable air suction fan is arranged in the air suction end, and the air suction fan is connected with the conveying shaft 22 by gear engagement or belt transmission. In addition, the dust suction pipe 24 is provided with a suction port in the axial direction, the suction port covers the outer surface of the adjacent sand roller 23, and the impurities removed from the surface of the steel belt by the sand roller 23 enter the dust suction pipe 24 through the suction port. The conveying shaft 22 drives the air suction fan to rotate, and the air mixed with the impurities in the dust suction pipe 24 is sucked. It can be understood that the air suction end of each dust suction pipe 24 is connected with a filtering and collecting device for separating and collecting the impurities in the air, which is convenient for centralized treatment.

[0032] When the steel belt is subjected to surface flatness pretreatment, the steel belt is first passed between the two laser emitters 112, the laser emitters 112 emit laser to ablate the uneven parts of the surface of the steel belt and transfer heat to the steel belt, so as to heat the steel belt to facilitate the release of stress of the steel belt, and then the steel belt enters the feeding mechanism 2 and is wound around the plurality of conveying shafts 22, and the conveying shafts 22 change the conveying direction of the steel belt. The cross section of the bent steel belt is deformed, and then the surface away from the conveying shaft 22 is elongated, which facilitates the sand roller 23 to grind the impurities formed by ablation of the surface of the steel belt and drives the stress in the steel belt to be released along the direction in which the sand roller 23 is arranged.

[0033] Please refer to Figures 2 to 4The grinding mechanism 3 further comprises a grinding frame 31 arranged in the middle section of the rack 1 and a grinding table 32 arranged below the grinding frame 31 for supporting the steel belt. The grinding frame 31 is arranged on the top surface of the rack 1 and comprises a mounting plate arranged horizontally and four support rods connected to the four corners of the bottom surface of the mounting plate, wherein each of the four support rods extends downward to be fixed to the rack 1, two support rods arranged along the width direction of the steel belt are arranged as a group, a limiting shaft 311 is arranged between the support rods in each group, and the steel belt changes the conveying direction by winding on the limiting shaft 311. The ends of the two limiting shafts 311 are connected with motors 312, the motors 312 drive the limiting shafts 311 to rotate, thereby driving the steel belt to move, and the two motors 312 can pull the steel belt to be tensioned by being arranged at different rotating speeds. The grinding table 32 is arranged below the grinding frame 31, the grinding table 32 is arranged as a hollow structure to form an oil storage chamber 321, the oil storage chamber 321 contains lubricating oil for spraying onto the surface of the steel belt to improve the grinding precision. The top surface of the grinding table 32 is protruded with fences 322 on both sides parallel to the moving direction of the steel belt, and longitudinal and transverse intersecting flow grooves 323 are arranged on the top surface of the grinding table 32 between the two fences 322 for supplying lubricating oil to flow; the bottom surface of the steel belt moves against the top surface of the grinding table 32, and the flow grooves 323 are located below the steel belt. The lubricating oil sprayed on the steel belt flows into the flow grooves 323 and is then adsorbed on the surface of the steel belt, thereby reducing the friction between the bottom surface of the steel belt and the top surface of the grinding table 32. At the same time, the lubricating oil has viscosity, adsorbs the steel belt on the top surface of the grinding table 32 to move in the horizontal direction, so that the steel belt does not vibrate during the grinding process.

[0034] The grinding frame 31 further comprises two rows of grinding holes arranged in a staggered manner, a grinding sleeve 313 is arranged in each grinding hole, each grinding sleeve 313 abuts against a grinding sleeve 313 in the other row, and the grinding sleeves 313 support each other when rotating to avoid axial jumping of the grinding sleeves 313. Each row of grinding sleeves 313 is synchronously rotated by being sleeved with a synchronous belt, and a driving source 33 is arranged between the two rows of grinding sleeves 313 to drive the two rows of grinding sleeves 313 to synchronously rotate. A pressure cavity 314 is arranged in each grinding sleeve 313, one end of the pressure cavity 314 close to the driving source 33 is connected with an oil delivery pipe in communication with the oil storage chamber 321, and the lubricating oil in the oil storage chamber 321 enters the pressure cavity 314 through the oil delivery pipe. The other end of the pressure cavity 314 close to the steel belt is used for mounting a liftable grinding ring 34, a constant pressure valve 35 is arranged in the middle of the grinding ring 34, one end of the constant pressure valve 35 is in communication with the pressure cavity 314, and the other end is inclined towards the surface of the steel belt.

[0035] When the grinding ring 34 grinds the surface of the steel belt, the oil storage chamber 321 continuously provides lubricating oil into the pressure chamber 314, so that the lubricating oil in the pressure chamber 314 has pressure, and the grinding ring 34 is pressed against the surface of the steel belt to rotate and grind. When the pressure of the lubricating oil in the pressure chamber 314 exceeds the pressure set by the constant pressure valve 35, the constant pressure valve 35 opens, and the lubricating oil flows to the surface of the steel belt through the constant pressure valve 35. The steel belt moves to bring the lubricating oil into contact with the grinding ring 34. The lubricating oil absorbs the heat generated by the rotation of the grinding ring 34 and the friction of the steel belt, thereby preventing the steel belt from being deformed due to heat and affecting the flatness of the steel belt.

[0036] Please refer to Figures 3 to 5 Each leveling structure 4 includes a leveling frame 41 and a leveling group 42. The leveling frame 41 is fixed on each set of support rods and covers the adjacent set of grinding sleeves 313. The leveling frame 41 extends to abut against the grinding table 32 at the end below the grinding sleeve 313. The leveling frame 41 includes a leveling cavity 411. One end of the leveling cavity 411 is provided with an opening in communication with the grinding table 32, so that the lubricating oil on the grinding table 32 can flow into the leveling cavity 411. The one end of the leveling cavity 411 is provided with a drainage port. A filter screen is installed in the drainage port to filter impurities mixed in the lubricating oil. The lower end of the drainage port is connected with a return pipe 412. The other end of the return pipe 412 is in communication with the oil storage chamber 321. The filtered lubricating oil enters the oil storage chamber 321 through the return pipe 412. The leveling group 42 is arranged in the leveling cavity 411 and abuts against the bottom surface of the grinding ring 34 below the grinding ring 34, and is used for leveling the grinding ring 34 after wear.

[0037] The leveling group 42 comprises a leveling block 421, a plurality of detection columns 422 and a scraper 423. The leveling block 421 is fixed on the bottom surface of the leveling cavity 411 and arranged along the radial direction of the grinding ring 34. The length direction of the leveling block 421 is provided with two parallel oil liquid cavities 4211. The oil liquid cavities 4211 contain oil liquid. The opening ends of the two oil liquid cavities 4211 are both arranged towards the grinding ring 34. The opening end of one of the oil liquid cavities 4211 is provided with a plurality of lifting pipes 4212 extending into the oil liquid cavity 4211. The other side wall of the oil liquid cavity 4211 is provided with a communication port, so that the two oil liquid cavities 4211 are in communication for the oil liquid to flow in the two oil liquid cavities. The opening end of the other oil liquid cavity 4211 is provided with a baffle to block the oil liquid in the oil liquid cavity 4211 from flowing out. The plurality of detection columns 422 are inserted into the plurality of lifting pipes 4212. One end of each detection column 422 in the oil liquid cavity 4211 is connected with a spring in a compressed state to support the detection column 422 to move in the lifting pipe 4212. The other end of the detection column 422 extends out of the lifting pipe 4212 to abut against the grinding ring 34 to support the grinding ring 34 to rotate horizontally. The scraper 423 is arranged in a "mouth" shape. The scraper 423 is sleeved on the baffle and corresponds to the communication port. The top surface of the scraper 423 is close to the grinding ring 34 with a very small gap. When the oil liquid in the oil liquid cavity 4211 flows out of the communication port, the scraper 423 is driven to rise relative to the baffle.

[0038] When the bottom surface of the grinding ring 34 is unevenly worn, the spring pushes the detection column 422 to rise and abut against the bottom surface of the grinding ring 34. The detection column 422 is driven to move, and the oil liquid in the oil liquid cavity 4211 enters the lifting pipe 4212. The oil liquid is driven to flow, and the scraper 423 is driven to rise and abut against the grinding ring 34. The scraper 423 grinds the uneven bottom surface of the grinding ring 34, so that the surface of the steel belt ground by the grinding ring 34 is flat.

[0039] The above embodiments only express the implementation of the present application, but cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A high flatness lapping device for steel strip, characterized by, The utility model relates to a laser engraving and polishing device for corrugated steel belt, which comprises a frame (1) placed on a horizontal plane, a laser engraving mechanism (11) installed at one end of the frame (1) to form a feeding end, and a feeding mechanism (2) arranged behind the laser engraving mechanism (11) along the moving direction of the steel belt to convey the corrugated steel belt and facilitate the removal of stress from the steel belt. The feeding mechanism (2) comprises a sand roller (23) that rotates against the surface of the steel belt to remove the ablated impurities on the surface of the steel belt. The polishing mechanism (3) is installed in the middle section of the frame (1) and comprises a polishing frame (31), a polishing table (32), and a polishing ring (34). The leveling structure (4) is arranged in two groups, each group of leveling structure (4) comprising a leveling frame (41) and a leveling group (42), the leveling frame (41) being arranged on the polishing frame (31) and extending to be connected with the polishing table (32), and the leveling group (42) being arranged on the leveling frame (41) and arranged along the radial direction of the polishing ring (34). The laser engraving mechanism (11) comprises a mounting rod (111) and two laser emitters (112), the mounting rod (111) being arranged in a door shape and comprising two vertical legs and a crossbeam connecting the two legs, the two laser emitters (112) being arranged in a staggered manner below the crossbeam, and the laser emission windows of the two laser emitters (112) being oppositely arranged, with the steel belt being arranged in the gap between the two laser emitters (112). The feeding mechanism (2) comprises two fixed plates (21) and a plurality of conveying shafts (22) rotatably arranged between the two fixed plates (21), the two fixed plates (21) being arranged against the mounting rod (111), each fixed plate (21) being provided with two rows of shaft holes, each conveying shaft (22) being rotatably arranged in each shaft hole, the steel belt being arranged around each conveying shaft (22) so that the steel belt is conveyed in a wave shape in the feeding mechanism (2), each conveying shaft (22) being provided with a belt at the shaft end, the sand roller (23) being connected to the belt, and the diameter of each conveying shaft (22) being greater than that of the sand roller (23) so that the rotational speed of the sand roller (23) is greater than that of the conveying shaft (22). The polishing frame (31) comprises a horizontally arranged mounting plate and support rods connected to the bottom surface of the mounting plate, two support rods arranged along the width direction of the steel belt being arranged as a group, a limiting shaft (311) being arranged between each group of support rods, the steel belt being changed in conveying direction by being arranged around the limiting shaft (311), and the end portions of the two limiting shafts (311) being connected to motors (312), the motors (312) driving the limiting shafts (311) to rotate. ​ The grinding table (32) includes an oil storage chamber (321) containing lubricating oil, and fences (322) protruding from both sides of the top surface of the grinding table (32) in parallel with the moving direction of the steel belt, and flow grooves (323) are arranged between the two fences (322) to allow the lubricating oil to flow. The grinding frame (31) further includes two rows of grinding holes arranged in staggered manner, each grinding hole is provided with a grinding sleeve (313), each grinding sleeve (313) abuts against the grinding sleeve (313) of the other row, each grinding sleeve (313) is provided with a pressure cavity (314), the pressure cavity (314) is connected with an oil delivery pipe in communication with the oil storage chamber (321), a grinding ring (34) is movably installed at one end of the pressure cavity (314) close to the steel belt, and a constant pressure valve (35) is arranged in the middle of the grinding ring (34), one end of the constant pressure valve (35) is in communication with the pressure cavity (314), and the other end is inclined towards the surface of the steel belt. The leveling group (42) includes a leveling block (421) fixed in the leveling cavity (411), the length direction of the leveling block is provided with two parallel oil chambers (4211), the opening ends of the two oil chambers (4211) are both directed towards the grinding ring (34), the opening end of one of the oil chambers (4211) is provided with a plurality of lifting pipes (4212), and the side wall close to the other oil chamber (4211) is provided with a communication port, so that the two oil chambers (4211) are in communication with each other, and the opening end of the other oil chamber (4211) extends a baffle to block the oil in the oil chamber (4211) from flowing out. The leveling group (42) further includes a plurality of detection columns (422) and a scraper (423), the plurality of detection columns (422) are inserted into the plurality of lifting pipes (4212) and extend upwards to abut against the grinding ring (34), the scraper (423) is arranged in a "mouth" shape, the scraper (423) is sleeved on the baffle and corresponds to the communication port, the top surface of the scraper (423) is close to the grinding ring (34) with a gap, the oil in the oil chamber (4211) flows out from the communication port to drive the scraper (423) to rise relative to the baffle.

2. The high flatness lapping device for steel strip according to claim 1, characterized in that, Each sand roller (23) is further provided with a dust suction pipe (24), both ends of the dust suction pipe (24) are inserted into the two fixed plates (21), one end of the dust suction pipe (24) extends out of the fixed plate (21) to form an air suction end, a rotatable air suction fan is installed in the air suction end, the air suction fan is connected with the conveying shaft (22), the conveying shaft (22) rotates to drive the air suction fan to rotate, and the air suction fan extracts the air mixed with impurities in the dust suction pipe (24).

3. The high flatness lapping device for steel strip according to claim 1, characterized in that, The leveling frame (41) includes a leveling cavity (411), one end of the leveling cavity (411) is provided with an opening in communication with the grinding table (32), the lubricating oil on the grinding table (32) flows into the leveling cavity (411), the leveling cavity (411) is provided with a liquid discharge port, a filter screen is installed in the liquid discharge port, and a return pipe (412) is connected to the lower end of the liquid discharge port, the other end of the return pipe (412) is in communication with the oil storage chamber (321).

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