Panel correcting device for steel box girder processing

Abstract

The present application relates to the field of correction processing, in particular to a kind of faceplate correction device for steel box girder processing, including machine body and the conveyor being located at the front end of machine body, device further includes: at least one bracing plate, be located on the machine body and close to conveyor;Movable support, by two symmetrical hinged in the bottom of the bracing plate swing arm and the connecting frame of connecting two swing arms is formed.The present application is before steel plate bites into straightening roll, utilize the automatic cleaning of upper and lower surface of faceplate by polishing roller with conveying linkage, thoroughly removes oxide scale, welding slag and other hard contaminants, and by scraper to the contamination of polishing barrier, this fundamentally avoids these hard things under the pressure of huge straightening to be pressed into the surface of straightening roll and form the problem of dent, indentation, significantly reduce the wear of straightening roll, reduce the maintenance cost and time of frequent shutdown repair or replacement roll, simultaneously, clean plate surface also avoids the scratch of subsequent workpiece surface by contaminant, improves the surface quality of steel box girder finished product.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of correction processing, in particular to a panel correction device for steel box girder processing. BACKGROUND

[0002] As a key load-bearing component of modern bridges and large buildings, the flatness of the panel of the steel box girder is the basis for ensuring the welding quality and precision of the overall structure. Before the steel box girder is assembled and welded, the steel plate used to make the panel must be flattened to eliminate the internal stress and warping deformation generated during rolling, transportation and cutting. If the deformed steel plate is directly used for assembly and welding, it will lead to difficulties in splicing, difficulty in controlling the quality of the weld, and ultimately affect the structural strength and safety of the entire girder.

[0003] At present, the steel plate is mainly flattened by a straightening machine, which applies a huge pressure to the steel plate through a plurality of groups of upper and lower staggered straightening rollers to make it undergo elastic-plastic deformation to achieve the purpose of flattening. However, during actual feeding, this process faces several significant problems:

[0004] Firstly, during the early rolling and open-air storage process, a hard oxide skin is formed on the surface of the steel plate, and after numerical control cutting or plasma cutting, a large amount of slag and burrs are left on the edges and surface. When these steel plates with contaminants enter the straightening machine, under the pressure of tens of tons or even hundreds of tons, these hard materials such as oxide skin and slag will be pressed into the relatively soft flattening roller surface like a mold, forming pits, indentations or scratches. This not only seriously damages the expensive straightening roller, reducing its service life and flattening accuracy, but also may cause secondary scratches on the surface of subsequent workpieces;

[0005] Secondly, the panel for the steel box girder is often thick and has warping due to internal stress, and the head of the panel is particularly difficult to feed into the straightening roller. The operator usually needs to use tools such as crowbars to assist in feeding near the dangerous roller gap during equipment operation, which poses a great risk of mechanical injury and highlights the safety hazards. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a panel correction device for steel box girder processing to solve the technical problems in the prior art.

[0007] In order to achieve the above purpose, the present application provides a panel correction device for steel box girder processing, which comprises a machine body and a conveyor arranged at the front end of the machine body, and further comprises:

[0008] At least one support plate is arranged on the machine body and close to the conveyor;

[0009] The movable support is composed of two symmetrical swing arms hinged to the bottom of the support plate and a connecting frame connecting the two swing arms.

[0010] an auxiliary roller rotatably mounted between one end of the two swing arms;

[0011] a grinding roller rotatably mounted at the other end of the two swing arms and higher than the auxiliary roller, one end of the grinding roller being fixed with a driven gear;

[0012] a motor fixed on the movable support, an output end of the motor penetrating the swing arm and being fixed with a driving gear engaged with the driven gear;

[0013] a pre-pressing assembly for driving the auxiliary roller to press the steel plate;

[0014] a mounting pin fixed at the bottom of the other end of the swing arm;

[0015] a side plate fixed symmetrically at the bottom of the support plate;

[0016] a fixed cylinder fixed at one side of the side plate, a straight slot being formed in the side wall of the fixed cylinder;

[0017] a rotating sleeve rotatably mounted on the outer wall of the fixed cylinder, an arc-shaped slot being formed in the side wall of the rotating sleeve;

[0018] a first hinged rod, one end of the first hinged rod being hinged with the mounting pin and the other end of the first hinged rod being hinged with the outer wall of the rotating sleeve;

[0019] a moving rod movably penetrating the fixed cylinder, a guide pin being fixed on the side wall of the moving rod and extending into the arc-shaped slot through the straight slot;

[0020] a guide plate fixed on the side of the moving rod close to the swing arm.

[0021] Preferably, the two ends of the guide plate have extension ends inclined away from the adjacent swing arm.

[0022] Preferably, the pre-pressing assembly comprises at least one moving rod movably penetrating the support plate and a hinged piece fixed on the end of the moving rod;

[0023] at least one U-shaped bracket fixed on the connecting frame, the U-shaped bracket being hingedly mounted with the hinged piece;

[0024] a fixed ring fixed on the lower end of the moving rod and a first spring sleeved on the moving rod, two ends of the first spring being fixed between the surface of the support plate and the surface of the fixed ring.

[0025] Preferably, a long circular hole is formed in the middle of the hinged piece, and the upper end of the U-shaped bracket is hingedly mounted in the long circular hole through a rotating shaft.

[0026] Preferably, a waist-shaped hole is formed in the end of the first hinged rod hinged with the mounting pin, and the mounting pin is hingedly mounted in the waist-shaped hole.

[0027] Preferably, the device further comprises a sliding groove formed on the machine body, a sliding block sliding in the sliding groove, an adjusting screw rod rotatably installed on the machine body, and two threaded sleeves symmetrically installed on the adjusting screw rod;

[0028] The sliding block is fixed to the end of the support plate, and the outer wall of the threaded sleeve is hingedly connected with a second hinge rod, and the other end of the second hinge rod is hingedly connected to the top of the support plate.

[0029] Preferably, the left and right ends of the adjusting screw rod are both provided with threads, and the threads at the left and right ends are oppositely arranged.

[0030] Preferably, a limiting ring is fixed on the adjusting screw rod, and one side of the limiting ring abuts against the end of the adjacent threaded sleeve.

[0031] Preferably, the device further comprises a dust cover fixed between the two swing arms and located above the polishing roller, at least one movable rod penetrating through the outer wall of the dust cover, a scraper fixed to the bottom of the movable rod, and a second spring sleeved on the movable rod.

[0032] The polishing roller has a gap between the outer ring and the inner ring of the dust cover, the two ends of the second spring abut against the dust cover and the scraper respectively, and the end of the scraper away from the dust cover is provided with a slope facing the polishing roller.

[0033] Preferably, the support plate is provided with two, and the two support plates are symmetrically arranged on the machine body.

[0034] The beneficial effects of the present application are as follows: by using the panel straightening device for steel box girder processing, the upper and lower surfaces of the panel are automatically cleaned by the polishing roller connected with the conveying before the steel plate is bitten into the straightening roller, which completely removes the hard contaminants such as oxide scale and welding slag, and the scraped contaminants are blocked by the scraper, which fundamentally avoids the problem that these hard objects are pressed into the surface of the straightening roller to form pits and indentations under the huge straightening pressure, significantly reduces the wear of the straightening roller, reduces the maintenance cost and time of frequent shutdown and grinding or replacement of the roller, and at the same time, the clean panel surface also avoids scratching of the subsequent workpiece surface, and improves the surface quality of the finished steel box girder;

[0035] By means of the reversible auxiliary roller and the pre-pressing assembly, the head of the thick plate or the warped plate can be smoothly guided into the straightening roller gap, realizing the automation of auxiliary feeding, so that the operator does not need to perform the close-range and high-risk crowbar auxiliary operation near the dangerous straightening roller gap, fundamentally eliminating the risk of personal injury accidents, and meeting the strict requirements of safety production.

[0036] In addition, the device utilizes a linkage mechanism to simultaneously drive the guide plate to retract towards the center while the auxiliary roller is raised for feeding and cleaning. This automatically centers and guides the moving steel plate, effectively preventing equipment damage caused by the steel plate hitting the machine body due to deviation. It ensures that the steel plate enters the straightening station smoothly in the correct posture, thereby improving the stability and production efficiency of the entire straightening process. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0039] Figure 2 This is a schematic diagram of a partial structure of the machine body, conveyor, and support plate in this invention;

[0040] Figure 3 This is a top view schematic diagram of some parts of the structure of the body, support plate and dust cover in this invention;

[0041] Figure 4 This is a schematic diagram of a partial structure of the machine body, support plate, and auxiliary rollers in this invention;

[0042] Figure 5 This is a schematic diagram of a partial structure of the support plate, side plate, and movable bracket in this invention;

[0043] Figure 6 This is an exploded view of a portion of the structure of the side plate, the first hinge rod, and the rotating sleeve in this invention.

[0044] Figure 7 This is a schematic diagram of a partial structure of the mounting pin, the first hinge rod, and the rotating sleeve in this invention;

[0045] Figure 8 This is an exploded view of a portion of the structure of the side plate, fixed cylinder, and moving rod in this invention;

[0046] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point A in the middle;

[0047] Figure 10 This is a schematic diagram of a partial structure of the movable support, adjusting screw, and support plate in this invention;

[0048] Figure 11 For the present invention Figure 10 Enlarged schematic diagram of the structure at point B;

[0049] Figure 12 It is the schematic view of local structure such as movable support, dust cover and scraper in the application;

[0050] Figure 13 It is the schematic view of local structure such as movable support, dust cover and scraper in the application; Figure 12 It is the enlarged schematic view of structure at C in the application.

[0051] Marked as:

[0052] 1, body; 2, conveyor; 3, support plate; 301, side plate; 4, movable support; 5, auxiliary roller; 6, grinding roller; 601, driven gear; 7, motor; 701, driving gear; 8, mounting pin; 9, first hinged rod; 10, fixed cylinder; 1001, straight groove; 11, rotating sleeve; 1101, arc-shaped groove; 12, moving rod; 1201, guide pin; 13, guide plate; 14, moving rod; 15, hinged piece; 16, U-shaped frame; 17, fixed ring; 18, first spring; 19, adjusting screw; 1901, limiting ring; 20, threaded sleeve; 21, second hinged rod; 22, dust cover; 23, movable rod; 24, scraper; 25, second spring. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the application more clear, the application will be further described in detail below with specific examples.

[0054] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the application should be understood as the usual meaning understood by those skilled in the art to which the application belongs. The terms "first", "second" and similar terms used in the application do not represent any order, quantity or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the terms cover the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. The terms "up", "down", "left", "right" and the like are only used to represent relative positional relationship, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0055] In a first aspect of the application, a panel correcting device for steel box girder processing is provided, as shown in the figure, comprising a body 1 and a conveyor 2 arranged at the front end of the body 1, the device further comprises: Figures 1-13

[0056] At least one support plate 3 is arranged on the body 1 and close to the conveyor 2.

[0057] ​The movable support 4 is composed of two symmetrical swing arms hinged to the bottom of the support plate 3 and a connecting frame connecting the two swing arms;

[0058] The auxiliary roller 5 is rotatably installed between one end of the two swing arms; it is to be added that the surface of the auxiliary roller 5 is a knurled metal roller;

[0059] The polishing roller 6 is rotatably installed at the other end of the two swing arms and is higher than the auxiliary roller 5, and one end of the polishing roller 6 is fixed with a driven gear 601; it is to be added that the two ends of the auxiliary roller 5 and the polishing roller 6 are rotatably installed on the swing arms through bearings to improve the stability of the rotation of the auxiliary roller 5 and the polishing roller 6;

[0060] The motor 7 is fixed on the movable support 4, and its output end penetrates the swing arm and is fixed with a driving gear 701 engaged with the driven gear 601;

[0061] The pre-pressing assembly is used to drive the auxiliary roller 5 to press the steel plate;

[0062] The mounting pin 8 is fixed to the bottom of the other end of the swing arm;

[0063] The side plate 301 is symmetrically fixed to the bottom of the support plate 3;

[0064] The fixed cylinder 10 is fixed to one side of the side plate 301, and a straight slot 1001 is formed in the side wall thereof;

[0065] The rotating sleeve 11 is rotatably installed on the outer wall of the fixed cylinder 10, and an arc-shaped slot 1101 is formed in the side wall thereof; it is to be added that the rotating sleeve 11 is rotatably installed between the inner wall and the outer wall of the fixed cylinder 10 through bearings to improve the stability of the rotation of the rotating sleeve 11;

[0066] The first hinged rod 9 is hinged at one end to the mounting pin 8 and at the other end to the outer wall of the rotating sleeve 11;

[0067] The moving rod 12 movably penetrates the fixed cylinder 10, and a guide pin 1201 extending into the arc-shaped slot 1101 through the straight slot 1001 is fixed to the side wall thereof;

[0068] The guide plate 13 is fixed to one side of the moving rod 12 close to the swing arm.

[0069] When the steel plate enters the direction of the straightening roll in the machine body 1 through the conveyor 2, first, the end of the steel plate contacts the auxiliary roller 5, at this time, the end of the steel plate is pressed on the curved surface of the auxiliary roller 5, trying to lift the auxiliary roller 5, this force will drive the whole swing arm to produce a tendency of rotating upward and backward around the hinge point with the support plate 3, when the auxiliary roller 5 is overturned upward and contacts the surface of the steel plate, through the lever principle, the swing arm drives the polishing roller 6 at the other end to rotate downward and contact the surface of the steel plate, at this time, under the drive of the motor 7, the driving gear 701 at the output end of the motor 7 is engaged with the driven gear 601 at the end of the polishing roller 6, so that the polishing roller 6 rotates, and the oxides, welding slag and burrs and other contaminants on the surface of the steel box girder panel are cleaned, avoiding that the oxides, welding slag and other hard substances are pressed into the relatively soft surface of the straightening roll like a mold under the straightening pressure of tens of tons or even hundreds of tons, forming pits, indentations or scratches;

[0070] When the swing arm is deflected, the mounting pin 8 at the bottom of the swing arm is deflected downward, pushing the first hinge rod 9, and the first hinge rod 9 pushes the hinge- connected rotating sleeve 11 at one end to rotate in the fixed cylinder 10, so as to make the rotating sleeve 11 push the guide pin 1201 on the moving rod 12 to move linearly along the straight slot 1001 on the side wall of the fixed cylinder 10 in rotation, so that the two moving rods 12 drive the corresponding guide plates 13 to move closer to the side wall of the steel plate, guiding the steel plate to the middle during conveying, avoiding the steel plate from being skewed when entering the position of the straightening roll in the machine body 1 and colliding with the machine body 1, causing damage to the straightening machine. Through this way, on the one hand, the auxiliary feeding before the steel plate is bitten can convey the steel box girder panel with a certain thickness and warping to the straightening roll, and the operator does not need to operate close to the roll gap in the dangerous area, greatly reducing the probability of safety accidents, on the other hand, through the combination of the linkage structure, the contaminants on the surface of the conveyed steel box girder panel can be cleaned, and the conveyed steel box girder panel is guided to avoid skewing.

[0071] In the embodiment: the two ends of the guide plate 13 have extension ends inclined away from the adjacent swing arm. Through the inclined setting of the extension ends, the angle between the two symmetrical guide plates 13 is increased, further facilitating the guiding of the steel plate.

[0072] In the embodiment: the pre-pressing assembly includes at least one movable rod 14 movably penetrating the support plate 3 and a hinge 15 fixed to the end of the movable rod 14; it should be noted that the movable rod 14 can be provided in plurality and movably penetrate the support plate 3 at equal intervals, so as to provide uniform and stable pressing action for the auxiliary roller 5;

[0073] At least one U-shaped bracket 16 fixed to the connecting frame, the U-shaped bracket 16 is hingedly installed with the hinge 15;

[0074] A fixed ring 17 is fixed to the lower end of the moving rod 14, and a first spring 18 is sleeved on the moving rod 14, and the two ends of the first spring 18 are fixed between the surface of the support plate 3 and the surface of the fixed ring 17.

[0075] After the auxiliary roller 5 is turned up to contact the surface of the steel plate, the U-shaped frame 16 is turned up at the same time, at this time, the U-shaped frame 16 pushes the articulated articulated member 15 to move upwards, so that the articulated member 15 drives the fixed moving rod 14 to rise, and the first spring 18 is pressed and squeezed under stress, at the same time, the first spring 18 generates a reverse force to push the articulated U-shaped frame 16 of the articulated member 15 to move downwards, so that the connecting frame pushes the auxiliary roller 5 to press the surface of the steel plate, realizing the auxiliary pressing action on the steel plate, and further helping the steel plate to enter the straightening roller;

[0076] In addition, it needs to be explained that, since the surface of the auxiliary roller 5 has knurled metal roller, after the auxiliary roller 5 is turned up to contact the surface of the steel plate, through the pre-pressing assembly, the auxiliary roller 5 generates a vertical downward pressure on the surface of the steel plate, significantly increases the normal pressure, thereby increasing the friction force, the contact point of the auxiliary roller 5 and the surface of the steel plate will generate a horizontal friction force, which is equivalent to a "thrust" to help the steel plate to enter the straightening roller, further playing the role of auxiliary pushing.

[0077] In the embodiment, a long circular hole is formed in the middle of the articulated member 15, and the upper end of the U-shaped frame 16 is hinged in the long circular hole. Since the upper end of the U-shaped frame 16 is hinged in the long circular hole in the middle of the articulated member 15, when the connecting frame is turned up by the swing arm, the turning of the U-shaped frame 16 is not interfered.

[0078] In the embodiment, a waist-shaped hole is formed in one end of the first articulated rod 9 hinged with the mounting pin 8, and the mounting pin 8 is hinged in the waist-shaped hole. When the first articulated rod 9 drives the articulated rotating sleeve 11 to rotate, the waist-shaped hole at the end of the first articulated rod 9 close to the mounting pin 8 is arranged to have a certain rotation allowance of the rotating sleeve 11, so as to avoid the normal rotation of the rotating sleeve 11.

[0079] In the embodiment, the device further comprises a sliding groove formed on the machine body 1, a sliding block sliding in the sliding groove, an adjusting screw 19 rotatably installed on the machine body 1, and two threaded sleeves 20 symmetrically screwed on the adjusting screw 19. It needs to be explained that the two ends of the adjusting screw 19 are rotatably installed between the machine body 1 through bearings.

[0080] The sliding block is fixed to the end of the support plate 3, the second articulated rod 21 is hinged on the outer wall of the threaded sleeve 20, and the other end of the second articulated rod 21 is hinged on the top of the support plate 3.

[0081] When it is necessary to adjust the height of the auxiliary roller 5 according to the thickness of the steel plate, the two threaded sleeves 20 symmetrically installed on the adjusting screw 19 are moved oppositely by rotating the adjusting screw 19, which drives the second articulated rod 21 to deflect, and since the support plate 3 is slidingly installed at both ends of the body 1, the second articulated rod 21 deflects and pulls the support plate 3 to vertically ascend, thereby achieving the effect of adjusting the height of the auxiliary roller 5 and improving the practicability.

[0082] In the embodiment, the left and right ends of the adjusting screw 19 are provided with threads, and the threads at the left and right ends are oppositely arranged. It should be noted that the threads at the left and right ends of the adjusting screw 19 are oppositely arranged, and during the rotation of the adjusting screw 19, the two threaded sleeves 20 can simultaneously move oppositely or relatively, thereby achieving the purpose of adjusting the height of the auxiliary roller 5.

[0083] In the embodiment, a limiting ring 1901 is fixed on the adjusting screw 19, and one side of the limiting ring 1901 abuts against the end of the adjacent threaded sleeve 20. By arranging the limiting ring 1901, when the auxiliary roller 5 is lowered to the limit position, the continuous movement of the threaded sleeve 20 is limited, thereby avoiding the collision of the two auxiliary rollers 5 and affecting the use.

[0084] In the embodiment, the device further comprises a dust cover 22 fixed between the two swing arms and located above the polishing roller 6, at least one movable rod 23 movably penetrating the outer wall of the dust cover 22, a scraper 24 fixed at the bottom of the movable rod 23, and a second spring 25 sleeved on the movable rod 23; it should be noted that a plurality of movable rods 23 can be arranged and movably penetrate the outer wall of the dust cover 22 at equal intervals, which can provide uniform and stable pressing action for the scraper 24.

[0085] The polishing roller 6 has a gap between the outer ring and the inner ring of the dust cover 22, the two ends of the second spring 25 abut against the dust cover 22 and the scraper 24 respectively, and one end of the scraper 24 away from the dust cover 22 is provided with a slope facing the polishing roller 6.

[0086] By arranging the dust cover 22, the dispersion of polishing dust can be reduced. When the steel plate contacts the slope of the scraper 24, the scraper 24 moves upward by extrusion of the slope, the second spring 25 is extruded and shrinks under stress, and when the slope of the scraper 24 is no longer extruded, the second spring 25 is elastically reset to push the scraper 24 to contact the surface of the steel plate. When the steel plate is conveyed, the scraper 24 scrapes the pollutants adhered to the surface of the steel plate, so that the pollutants are isolated on one side of the scraper 24, the pollutants on the surface of the steel plate enter the straightening roller, the maintenance cost and time of frequent shutdown and grinding or replacement of the roller are further reduced, the clean plate surface avoids scratching of the subsequent workpiece surface, and the surface quality of the finished steel box girder is improved.

[0087] In the embodiment, the two supporting plates 3 are symmetrically arranged on the machine body 1. It should be noted that, by arranging the two supporting plates 3, the auxiliary rollers 5 and the polishing rollers 6 can be arranged on the upper and lower surfaces of the steel plate simultaneously, so that the upper and lower surfaces of the steel plate can be polished simultaneously, and the steel plate can be guided and pushed.

[0088] Those skilled in the art should understand that the discussion of the above any embodiment is only exemplary, and is not intended to imply that the scope (including claims) of the present application is limited to these examples; the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

[0089] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any one of the above-mentioned alternatives, modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. A panel straightening device for steel box girder processing, comprising a machine body (1) and a conveyor (2) arranged at the front end of the machine body (1), characterized in that, The device further comprises: at least one support plate (3) arranged on the machine body (1) and close to the conveyor (2); a movable support (4) composed of two symmetrical swing arms hingedly connected to the bottom of the support plate (3) and a connecting frame connecting the two swing arms; an auxiliary roller (5) rotatably arranged between one end of the two swing arms; a polishing roller (6) rotatably arranged at the other end of the two swing arms and higher than the auxiliary roller (5), one end of the polishing roller (6) being fixed with a driven gear (601); a motor (7) fixed on the movable support (4), the output end of the motor (7) penetrating the swing arms and being fixed with a driving gear (701) engaged with the driven gear (601); a pre-pressing assembly for driving the auxiliary roller (5) to press the steel plate; a mounting pin (8) fixed to the other end of the swing arm; a side plate (301) fixed symmetrically to the bottom of the support plate (3); a fixed cylinder (10) fixed to one side of the side plate (301), the side wall of the fixed cylinder (10) being provided with a straight slot (1001); a rotating sleeve (11) rotatably arranged on the outer wall of the fixed cylinder (10), the side wall of the rotating sleeve (11) being provided with an arc-shaped slot (1101); a first hinged rod (9) hingedly connected at one end to the mounting pin (8) and at the other end to the outer wall of the rotating sleeve (11); a moving rod (12) movably penetrating the fixed cylinder (10), the side wall of the moving rod (12) being fixed with a guide pin (1201) extending into the arc-shaped slot (1101) through the straight slot (1001); a guide plate (13) fixed to one side of the moving rod (12) close to the swing arm; the device further comprises a dust cover (22) fixed between the two swing arms and above the polishing roller (6), at least one movable rod (23) movably penetrating the outer wall of the dust cover (22), a scraper (24) fixed to the bottom of the movable rod (23), and a second spring (25) sleeved on the movable rod (23); the outer ring of the polishing roller (6) and the inner ring of the dust cover (22) have a gap, the two ends of the second spring (25) abut against the dust cover (22) and the scraper (24) respectively, and one end of the scraper (24) away from the dust cover (22) is provided with a slope towards the polishing roller (6).

2. The panel straightening device for steel box girder processing according to claim 1, characterized in that, the two ends of the guide plate (13) have extension ends inclined away from the adjacent swing arm.

3. The panel straightening device for steel box girder processing according to claim 1, characterized in that, the pre-pressing assembly comprises at least one movement rod (14) movably penetrating the support plate (3) and a hinged piece (15) fixed to the end of the movement rod (14); at least one U-shaped frame (16) fixed to the connecting frame, the U-shaped frame (16) being hingedly connected to the hinged piece (15); a fixed ring (17) fixed to the lower end of the movement rod (14) and a first spring (18) sleeved on the movement rod (14), the two ends of the first spring (18) being fixed between the surface of the support plate (3) and the surface of the fixed ring (17).

4. The panel straightening device for steel box girder processing according to claim 3, characterized in that, a long circular hole is formed in the middle of the hinged piece (15), and the upper end of the U-shaped frame (16) is hingedly connected to the long circular hole through a rotating shaft.

5. The panel straightening device for steel box girder processing according to claim 1, characterized in that, a waist-shaped hole is formed in one end of the first hinged rod (9) hingedly connected to the mounting pin (8), and the mounting pin (8) is hingedly connected to the waist-shaped hole.

6. The panel straightening device for steel box girder fabrication of claim 1, wherein The device further comprises a sliding groove formed on the body (1), a sliding block sliding in the sliding groove, an adjusting screw rod (19) rotatably installed on the body (1), and two threaded sleeves (20) symmetrically installed on the adjusting screw rod (19). The sliding block is fixed to the end of the support plate (3), the outer wall of the threaded sleeve (20) is hingedly connected with a second hinge rod (21), and the other end of the second hinge rod (21) is hingedly connected to the top of the support plate (3).

7. The panel straightening device for steel box girder processing according to claim 6, characterized in that, The left and right ends of the adjusting screw rod (19) are provided with threads, and the thread directions of the left and right ends are oppositely arranged.

8. The panel straightening device for steel box girder fabrication according to claim 6, characterized in that, The adjusting screw rod (19) is fixed with a limiting ring (1901), and one side of the limiting ring (1901) abuts against the end of the adjacent threaded sleeve (20).

9. The panel straightening device for steel box girder fabrication of claim 1, wherein The support plate (3) is provided with two support plates (3), and the two support plates (3) are symmetrically arranged on the body (1).

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