Galvanized strip steel plate shape straightening machine and method thereof

Abstract

The invention relates to the technical field of plate straightening equipment, and particularly discloses a galvanized strip steel plate straightening machine which comprises a base, a controller, a limiting structure, a pair of flattening structures and a pressing structure. The controller is fixedly arranged on the upper wall of the left end of the base and close to the rear side, the limiting structure is fixedly arranged on the upper wall of the base and located in the middle, the pair of flattening structures are symmetrically arranged on the left side and the right side of the limiting structure correspondingly, and the downward pressing structure is fixedly arranged on the upper wall of the base and located on the rear side of the limiting structure. Then the plates are pressed and fixed, the two ends are movably pushed and pressed to be corrected and flattened, the use requirements of the plates with different lengths to a certain degree can be met, length adjustment within a certain range can be conducted, and meanwhile correction use of the two ends of the vertical plates in the downward or downward bending state can be achieved by means of a downward pressing structure; multi-direction and multi-mode correction use is achieved, and meanwhile vertical plates are convenient to load and unload.

Description

Technical Field

[0001] The invention relates to the technical field of plate straightening equipment, in particular to a galvanized strip steel plate straightening machine and a method thereof. Background Art

[0002] Galvanized steel strip is a common metal material. After the surface of cold-rolled or hot-rolled steel strip is cleaned, it is immersed in high-temperature zinc liquid to attach a layer of zinc to the surface of the steel strip, thereby playing a protective and decorative role. This zinc layer can prevent the steel strip substrate from corrosion and extend its service life; the processed steel plate may have an irregular shape, or the plate may be deformed during transportation, etc., which needs to be corrected before it can be used. However, the existing plate straightening machine has a complex structure and high cost, and it mostly corrects the bending of the horizontal surface of the plate, and cannot achieve the bending correction of the plate wall thickness. Therefore, a galvanized steel strip plate straightening machine and method are designed. Summary of the invention

[0003] The object of the present invention is to provide a galvanized steel plate straightening machine and method thereof to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above-mentioned problems, the present invention provides the following technical solutions: a galvanized steel plate straightening machine, comprising a base, a controller, a limiting structure, a pair of flattening structures and a downward pressing structure; the controller is fixedly arranged on the upper wall of the left end of the base and close to the rear side, the limiting structure is fixedly arranged on the upper wall of the base and located in the middle, the pair of flattening structures are symmetrically arranged on the left and right sides of the limiting structure, and the downward pressing structure is fixedly arranged on the upper wall of the base and located on the rear side of the limiting structure.

[0005] Preferably, the limiting structure includes a pair of legs, a correction seat, a first electric slide rail, a second electric slide rail, a pair of first roller frames, a pair of first laying rollers and a pair of cameras; one end of the pair of legs is respectively fixedly arranged on the upper wall of the base, one end of the correction seat is fixedly arranged on the other end of the pair of legs, the first electric slide rail is fixedly arranged on the front end upper wall of the base and is located in the middle, the second electric slide rail is fixedly arranged on the first electric slide rail, and the second electric slide rail is perpendicular to the first electric slide rail, and the second electric slide rail is symmetrically provided with a second movable seat that moves relatively, one end of the pair of roller frames is respectively fixedly arranged on the second movable seat of the second electric slide rail, and the first roller frames move relatively, a pair of the first laying rollers are respectively movably arranged on the first roller frames, and the bottom end of the first laying roller is located above one end of the correction seat, and a pair of cameras are respectively arranged on one end of the first roller frames and the cameras are opposite to the correction seat.

[0006] Preferably, the flattening structure includes a third electric slide rail, a movable arm, three pairs of connecting rods, a first hydraulic cylinder, three mounting bolts, a pair of sliding seats, three brackets, three second roller frames and three second laying rollers; the third electric slide rail is fixedly arranged on the upper wall of the front end of the base and is located on the left side of the first electric slide rail, one end of the movable arm is fixedly arranged on the third electric slide rail and the movable arm moves back and forth, and a cross-shaped sliding groove is penetrated through the middle of the other end, one end of the three pairs of connecting rods are respectively connected in series through relative cross-movement pins, and the middle part of one pair of connecting rods is movably connected through the mounting bolts, and the two ends of the first hydraulic cylinder are respectively movably connected between one end of one of the connecting rods, wherein A mounting bolt is screwed into the middle part of the upper wall at one end of the movable arm, and the other two mounting bolts are movably inserted in the sliding grooves respectively. A pair of the sliding seats are cross-shaped, and a pair of the sliding seats are movably inserted in the sliding grooves of the movable arm respectively, and the sliding seats are connected to the mounting bolts respectively. The three brackets are movably clamped on the movable arm respectively, and the two ends of the brackets are respectively fixedly connected to the front and rear side walls of the sliding seat and the front and rear side walls of one end of the movable arm. The brackets are respectively located at the intersection of the connecting rods, and one end of the three second roller frames is respectively fixedly set on the upper walls of the three brackets, and the second roller frames correspond to the first roller frames, and the three second laying rollers are respectively movably set on the second roller frames.

[0007] Preferably, the second laying roller is on the same horizontal line as the first laying roller.

[0008] Preferably, the pressing structure includes a fourth electric slide rail and a pair of pressing components, the fourth electric slide rail is fixedly arranged on the upper wall of the base and is located on the rear side of the correction seat, one of the pressing components is fixedly arranged on the upper wall of the base and is located on the left side of the fourth electric slide rail, the other pressing component is fixedly arranged on the fourth electric slide rail, and the two pressing components are respectively located symmetrically on the left and right ends of the correction seat, and the pair of pressing components respectively correspond to the flattening structures.

[0009] Preferably, the pressing assembly comprises a supporting plate, a second hydraulic cylinder, a sliding column, a sliding frame and a pair of pressing rollers;

[0010] The support plate is fixedly set on the fourth electric slide rail, one end of the second hydraulic cylinder is fixedly set on one end of the support plate, one end of the slide column is fixedly set on the middle part of the upper wall of the support plate, one end of the slide is movably mounted on the slide column, and one end of the slide is connected to the telescopic end of the second hydraulic cylinder, the other end of the slide is located in front of the other end of the correction seat, a pair of lower pressure rollers are respectively movably set on the other end of the slide and are symmetrical to each other, and the pair of lower pressure rollers are respectively located above one end of the correction seat.

[0011] Preferably, the lower pressure rollers are respectively located between the second laying rollers.

[0012] Preferably, when the lower pressing rollers move left and right, one of the lower pressing rollers is located between the first laying rollers.

[0013] A galvanized steel strip straightening method comprises the following steps:

[0014] Step 1: Support the device with the base, power it on, and then drive it with the controller;

[0015] Step 2: Stand the plate to be corrected and place it on the correction seat, and then use the first laying roller in the limiting structure to squeeze and fit the plate on the correction seat;

[0016] Step 3: Then, the two flattening structures are driven to apply force to both ends of the plate, so as to correct the bent ends of the plate and fit them on the correction seat;

[0017] Step 4: If both ends of the plate are twisted, the downward pressure structure can be driven to apply force to correct the two ends of the plate.

[0018] The invention proposes a galvanized steel plate straightening machine and method, which has the beneficial effects of: by vertically carrying the upright plate, pressing and fixing the plate, and pushing the two ends movably to correct and flatten it, it can meet the use requirements of plates of different lengths to a certain extent, and adjust the length within a certain range. At the same time, with the help of the downward pressing structure, the two ends of the vertical plate can be corrected and used in a downward or downward bending state, and the correction and use in multiple directions and ways can be achieved. At the same time, the upright plate is also convenient for loading and unloading. In summary, the invention has the following effects:

[0019] 1. Multi-directional correction can be achieved by correcting and flattening the two ends of the plate with movable push, and correcting the downward or downward bending state of the two ends of the vertical plate with the help of the downward pressure structure; this effectively guarantees the flatness and shape accuracy of the plate in different directions, greatly improving the quality of plate correction and effectively using it for the bending state of the plate.

[0020] 2. Not only is the plate pressed and fixed, but there are also push corrections at both ends and auxiliary corrections of the downward pressure structure. The combination of multiple correction methods can more comprehensively deal with various deformation problems that may occur in the plate, so that the plate as a whole can achieve an ideal correction effect.

[0021] 3. It can meet the needs of using plates of different lengths to a certain extent and adjust the length within a certain range, which means that the equipment has good versatility. The upright plates are easy to load and unload. Compared with the traditional loading and unloading method of flat plates, the upright plates are more convenient and quicker to operate. Operators can more easily place or remove the plates on the equipment, reducing physical exertion and operating difficulty during loading and unloading. The correction capabilities in multiple directions and methods and convenient loading and unloading operations all help to improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the assembly structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the split structure of the limiting structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the assembly structure of the limiting structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the split structure of the flattened structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the assembly structure of the flattening structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the split structure of the downward pressing structure of the present invention;

[0028] Figure 7 It is a schematic diagram of the assembly structure of the pressing-down structure of the present invention;

[0029] Figure 8 For the present invention Figure 4 A local enlarged view of point A in FIG.

[0030] Fig. 9 For the present invention Figure 4 A local enlarged view of point B in FIG.

[0031] Fig.10 For the present invention Figure 1 A partial enlarged view of point C in the figure.

[0032] In the figure: 1. base, 2. controller, 3. limit structure, 31. support leg, 32. correction seat, 33. first electric slide rail, 34. second electric slide rail, 35. first roller frame, 36. first laying roller, 37. camera, 4. flattening structure, 41. third electric slide rail, 42. moving arm, 43. connecting rod, 44. first hydraulic cylinder, 45. mounting bolt, 46. sliding seat, 47. bracket, 48. second roller frame, 49. second laying roller, 5. pressing structure, 51. fourth electric slide rail, 52. support plate, 53. second hydraulic cylinder, 54. slide column, 55. slide frame, 56. pressing roller, 6. sliding groove. DETAILED DESCRIPTION

[0033] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-10 The present invention provides a technical solution: a galvanized steel plate straightening machine, comprising a base 1, a controller 2, a limiting structure 3, a pair of flattening structures 4 and a pressing structure 5; the base 1 is rectangular, the controller 2 is fixedly arranged on the upper wall of the left end of the base 1 and close to the rear side, the limiting structure 3 is fixedly arranged on the upper wall of the base 1 and located in the middle, a pair of flattening structures 4 are symmetrically arranged on the left and right sides of the limiting structure 3, and the pressing structure 5 is fixedly arranged on the upper wall of the base 1 and located on the rear side of the limiting structure 3; supported by the base 1, the equipment is controlled by the controller 2, the plate is initially vertically limited by the limiting structure 3, the bent plate is vertically straightened and then laid out front and back by the flattening structure 4, and the plate after vertical limitation is corrected in the up and down directions by the pressing structure 5.

[0035] As a further solution of the present invention, the limiting structure 3 includes a pair of legs 31, a correction seat 32, a first electric slide rail 33, a second electric slide rail 34, a pair of first roller frames 35, a pair of first rollers 36 and a pair of cameras 37; one end of the pair of legs 31 is respectively fixedly arranged on the upper wall of the base 1, the correction seat 32 is L-shaped, one end of the correction seat 32 is fixedly arranged on the other end of the pair of legs 31, the first electric slide rail 33 is fixedly arranged on the front end upper wall of the base 1 and is located in the middle, the second electric slide rail 34 is fixedly arranged on the first electric slide rail 33, and the second electric slide rail 34 is perpendicular to the first electric slide rail 33, and the second electric slide rail 34 is symmetrically provided with a second movable seat that moves relatively, and one end of the pair of roller frames is respectively fixedly arranged On the second movable seat of the second electric slide rail 34, and the first roller frame 35 moves relatively, a pair of first laying rollers 36 are movably arranged on the first roller frame 35, and the bottom ends of the first laying rollers 36 are located above one end of the correction seat 32, a pair of cameras 37 are respectively arranged on one end of the first roller frame 35, and the cameras 37 are opposite to the correction seat 32; the correction seat 32 is supported at a certain height by the support legs 31 to correspond to the first laying roller 36 and the second laying roller 49, and the first laying roller 36 on the first roller frame 35 is driven by the first electric slide rail 33 to approach the correction seat 32 for extrusion and fixation, the spacing of the first laying rollers 36 can be adjusted by the second electric slide rail 34, and the position and method of the plate to be corrected can be autonomously detected by imaging with the cameras 37.

[0036] As a further solution of the present invention, the flattening structure 4 includes a third electric slide rail 41, a moving arm 42, three pairs of connecting rods 43, a first hydraulic cylinder 44, three mounting bolts 45, a pair of sliding seats 46, three brackets 47, three second roller frames 48 and three second laying rollers 49; the third electric slide rail 41 is fixedly arranged on the upper wall of the front end of the base 1 and is located on the left side of the first electric slide rail 33, one end of the moving arm 42 is fixedly arranged on the third electric slide rail 41 and the moving arm 42 moves forward and backward, the moving arm 42 is a rectangular rod body, and a cross is opened in the middle of the other end The first hydraulic cylinder 44 is a hydraulic cylinder having a plurality of connecting rods 43 and a plurality of connecting rods 43 connected to each other through a plurality of connecting rods 43. The first hydraulic cylinder 44 is a hydraulic cylinder having a plurality of connecting rods 43 connected to each other through ... The three brackets 47 are connected by mounting bolts 45, and the three brackets 47 are respectively movably mounted on the movable arm 42, and the two ends of the brackets 47 are respectively fixedly connected to the front and rear side walls of the sliding seat 46 and the front and rear side walls of one end of the movable arm 42, and the brackets 47 are respectively located at the intersection of the connecting rod 43, and one end of the three second roller frames 48 is respectively fixedly set on the upper wall of the three brackets 47, and the second roller frames 48 correspond to the first roller frames 35, and the three second laying rollers 49 are respectively movably set on the second roller frames 48, and the second laying rollers 49 are on the same horizontal line as the first laying rollers 36; through the third electric The movable slide rail 41 drives the second laying roller 49 on the second roller frame 48 to move relative to the correction seat 32 to correct the bent plate. By driving the first hydraulic cylinder 44, one of the pairs of connecting rods 43 is driven to flip relative to each other, so that the relatively serially connected connecting rods 43 are flipped synchronously, and then the sliding seat 46 connected by the mounting bolts 45 is adjusted to move equidistantly in the sliding groove 6 of the movable arm 42, so as to adjust the distance between the three second laying rollers 49 and adjust the force range and position. In order to apply force to the plate through the second laying rollers 49, the third electric slide rail 41 can be replaced with a hydraulic drive to apply force.

[0037] As a further solution of the present invention, the pressing structure 5 includes a fourth electric slide rail 51 and a pair of pressing components. The fourth electric slide rail 51 is fixedly arranged on the upper wall of the base 1 and is located on the rear side of the correction seat 32. One of the pressing components is fixedly arranged on the upper wall of the base 1 and is located on the left side of the fourth electric slide rail 51. The other pressing component is fixedly arranged on the fourth electric slide rail 51. The two pressing components are respectively located symmetrically at the left and right ends of the correction seat 32. The pair of pressing components respectively correspond to the flattening structure 4. The fourth electric slide rail 51 is used to drive one of the pressing components to move left and right to adjust the required correction position of the plate, and the other pressing component is used to apply downward force to fix one end of the plate to prevent the other end from tilting due to force.

[0038] As a further solution of the present invention, the pressing assembly includes a support plate 52, a second hydraulic cylinder 53, a slide column 54, a slide 55 and a pair of pressing rollers 56; the support plate 52 is rectangular, the support plate 52 is fixedly arranged on the fourth electric slide rail 51, one end of the second hydraulic cylinder 53 is fixedly arranged on one end of the support plate 52, one end of the slide column 54 is fixedly arranged in the middle of the upper wall of the support plate 52, one end of the slide 55 is movably mounted on the slide column 54, and one end of the slide 55 is connected to the telescopic end of the second hydraulic cylinder 53, the other end of the slide 55 is located at the front side of the other end of the correction seat 32, a pair of pressing rollers 56 are movably arranged on the other end of the slide 55 and are symmetrical to each other, and a pair of pressing rollers 56 are respectively located above one end of the correction seat 32; the second hydraulic cylinder 53 and the slide column 54 are carried by the support plate 52, and the slide 55 is driven to rise and fall with the help of the slide column 54 through the telescopic movement of the second hydraulic cylinder 53, so as to adjust the height and downward pressure of the pressing roller 56.

[0039] As a further solution of the present invention, the pressing rollers 56 are respectively located between the second laying rollers 49 to realize pressing the plate according to design requirements.

[0040] As a further solution of the present invention, when the lower pressing roller 56 moves left and right, one of the lower pressing rollers 56 is located between the first laying rollers 36, so as to realize the lower pressing roller 56 being able to apply force to different positions of the plate according to design requirements.

[0041] Working principle:

[0042] First, after the equipment is powered on with the stable support of the base 1, the equipment is controlled by the controller 2; by controlling the first laying roller 36 and the second laying roller 49 in the limiting structure 3 and the flattening structure 4 to be close to the correction seat 32 supported by the support leg 31 and maintaining a certain distance, the corresponding plate can be inserted into the correction seat 32 and located between the other end of the correction seat 32 and the first laying roller 36 and the second laying roller 49, and the middle part of the plate can be fixed at the first laying roller 36 (the length of the processed plate cannot be greater than the length of the correction seat 32 and the height of the other end of the correction group, and the number of the correction seat 32 and the second laying roller 49 is set according to actual needs);

[0043] Then, the first electric slide rail 33 is driven to drive the first laying roller 36 on the first roller frame 35 to move relative to the plate, and the plate is pressed on the correction seat 32 by the first laying roller 36 to fit; at this time, the second electric slide rail 34 can be driven to adjust the distance between the two first laying rollers 36 to adjust the force application fixed position, and the camera 37 is used for imaging, and the bending direction of the plate is automatically detected based on the existing technology and controlled by the controller 2;

[0044] When the plate is fixed vertically, the front side walls at both ends of the plate are wide walls, and the upper wall of the plate is the thickness wall of the plate; therefore, if the front and rear walls at both ends of the plate are bent in the front-to-back direction, they are driven by two symmetrically arranged groups of flattening structures 4, that is, the third electric slide rail 41 is driven to drive the moving arm 42 to move forward and backward, and the second laying roller 49 on the second roller frame 48 is driven to apply force to the two ends of the plate, so that the bending part of the plate is forced to reset through the shielding of the correction seat 32; at the same time, after the second laying roller 49 contacts the front side wall of the plate, the first hydraulic cylinder 44 can be driven to extend and retract, and the extension and retraction of the first hydraulic cylinder 44 drives one of them The connecting rods 43 are relatively flipped by means of the mounting bolts 45, and all the connecting rods 43 are driven to cross-flip at the same time, so as to adjust the spacing between the mounting bolts 45, that is, during the cross-flipping process of the connecting rods 43, the mounting bolts 45 move and drive the sliding seat 46 to move equidistantly in the sliding groove 6 of the movable arm 42, so as to adjust the spacing of the second paving rollers 49, that is, the two sets of flattening structures 4 realize the movement of the second paving rollers 49 to both sides, and after the distance is corrected or increased by the horizontal push force, the movement is driven by the third electric slide rail 41 for extrusion correction (at this time, the force driven by the third electric slide rail 41 can be replaced by the hydraulic cylinder drive according to the demand);

[0045] When both ends of the vertical plate bend upward or downward, after being limited by the limiting structure 3 and the flattening structure 4, the spacing between the second laying rollers 49 is increased, and then the pressing assembly in the pressing structure 5 on the left side of the correction seat 32 is first driven to fix one end of the plate; that is, the second hydraulic cylinder 53 on the support plate 52 is driven to contract, driving the slide 55 to slide down on the slide column 54, driving the corresponding pressing roller 56 to descend and press on the upper wall of the left end of the plate, and the pressing roller 56 will pass between the two second laying rollers 49 to fit and apply force;

[0046] Since the left end of the plate is limited front and back and up and down at this time, the fourth electric slide rail 51 can be controlled to drive another pressing component to move left and right to adjust the pressing position according to the bending part of the plate, and at the same time, the second hydraulic cylinder 53 is driven to drive the pressing roller 56 to descend to apply downward force to the other end of the plate to achieve correction. The pressing roller 56 located on the fourth electric slide rail 51 also passes between the second laying rollers 49 or the first laying rollers 36 to apply force for displacement, thereby finally achieving the correction requirements in two directions.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A galvanized steel plate straightening machine, characterized in that: The device comprises a base (1), a controller (2), a limiting structure (3), a pair of flattening structures (4) and a downward pressing structure (5); the controller (2) is fixedly arranged on the upper wall of the left end of the base (1) and close to the rear side, the limiting structure (3) is fixedly arranged on the upper wall of the base (1) and located in the middle, the pair of flattening structures (4) are symmetrically arranged on the left and right sides of the limiting structure (3), and the downward pressing structure (5) is fixedly arranged on the upper wall of the base (1) and located at the rear side of the limiting structure (3); The limiting structure (3) comprises a pair of legs (31), a correction seat (32), a first electric slide rail (33), a second electric slide rail (34), a pair of first roller frames (35), a pair of first laying rollers (36) and a pair of cameras (37); One end of a pair of legs (31) is fixedly arranged on the upper wall of the base (1), one end of the correction seat (32) is fixedly arranged on the other end of the pair of legs (31), the first electric slide rail (33) is fixedly arranged on the upper wall of the front end of the base (1) and is located in the middle, the second electric slide rail (34) is fixedly arranged on the first electric slide rail (33), and the second electric slide rail (34) is perpendicular to the first electric slide rail (33), and the second electric slide rail (34) is symmetrically arranged on the second electric slide rail (34) for relative movement, one end of a pair of roller frames is fixedly arranged on the second movable seat of the second electric slide rail (34), and the first roller frame (35) moves relatively, a pair of the first laying rollers (36) are movably arranged on the first roller frame (35), and the bottom end of the first laying roller (36) is located above one end of the correction seat (32), and a pair of cameras (37) are arranged on one end of the first roller frame (35), and the camera (37) is opposite to the correction seat (32).

2. A galvanized steel plate straightening machine according to claim 1, characterized in that: The flattening structure (4) comprises a third electric slide rail (41), a movable arm (42), three pairs of connecting rods (43), a first hydraulic cylinder (44), three mounting bolts (45), a pair of sliding seats (46), three brackets (47), three second roller frames (48) and three second laying rollers (49); The third electric slide rail (41) is fixedly arranged on the upper wall of the front end of the base (1) and is located on the left side of the first electric slide rail (33). One end of the movable arm (42) is fixedly arranged on the third electric slide rail (41) and the movable arm (42) moves forward and backward, and a cross-shaped sliding groove (6) is penetrated in the middle of the other end. One end of the three pairs of connecting rods (43) are respectively connected in series through relative cross-movement through pins, and the middle of one pair of connecting rods (43) is movably connected through the mounting bolt (45). The two ends of the first hydraulic cylinder (44) are respectively movably connected between one end of one of the connecting rods (43), one of the mounting bolts (45) is screwed into the middle of the upper wall of one end of the movable arm (42), and the other two mounting bolts (45) are respectively movably inserted into the sliding groove (6). The pair of sliding seats (46) are both cross-shaped, and the pair of sliding seats (46) are respectively movably inserted into the sliding grooves (6) of the moving arms (42), and the sliding seats (46) are respectively connected to the mounting bolts (45). The three brackets (47) are respectively movably clamped on the moving arms (42), and the two ends of the brackets (47) are respectively fixedly connected to the front and rear side walls of the sliding seats (46) and the front and rear side walls of one end of the moving arms (42). The brackets (47) are respectively located at the intersection of the connecting rods (43). One ends of the three second roller frames (48) are respectively fixedly arranged on the upper walls of the three brackets (47), and the second roller frames (48) correspond to the first roller frames (35). The three second laying rollers (49) are respectively movably arranged on the second roller frames (48).

3. A galvanized steel plate straightening machine according to claim 2, characterized in that: The second laying roller (49) and the first laying roller (36) are on the same horizontal line.

4. A galvanized steel plate straightening machine according to claim 3, characterized in that: The pressing structure (5) comprises a fourth electric slide rail (51) and a pair of pressing components, wherein the fourth electric slide rail (51) is fixedly arranged on the upper wall of the base (1) and is located at the rear side of the correction seat (32), wherein one of the pressing components is fixedly arranged on the upper wall of the base (1) and is located on the left side of the fourth electric slide rail (51), wherein the other pressing component is fixedly arranged on the fourth electric slide rail (51), and the two pressing components are respectively located symmetrically at the left and right ends of the correction seat (32), and the pair of pressing components respectively correspond to the flattening structure (4).

5. A galvanized steel plate straightening machine according to claim 4, characterized in that: The pressing assembly comprises a supporting plate (52), a second hydraulic cylinder (53), a sliding column (54), a sliding frame (55) and a pair of pressing rollers (56); The support plate (52) is fixedly arranged on the fourth electric slide rail (51), one end of the second hydraulic cylinder (53) is fixedly arranged on one end of the support plate (52), one end of the slide column (54) is fixedly arranged on the middle part of the upper wall of the support plate (52), one end of the slide frame (55) is movably mounted on the slide column (54), and one end of the slide frame (55) is connected to the telescopic end of the second hydraulic cylinder (53), the other end of the slide frame (55) is located in front of the other end of the correction seat (32), a pair of lower pressure rollers (56) are respectively movably arranged on the other end of the slide frame (55) and are symmetrical to each other, and the pair of lower pressure rollers (56) are respectively located above one end of the correction seat (32).

6. A galvanized steel plate straightening machine according to claim 5, characterized in that: The lower pressure rollers (56) are respectively located between the second laying rollers (49).

7. A galvanized steel plate straightening machine according to claim 6, characterized in that: When the lower pressing rollers (56) move left and right, one of the lower pressing rollers (56) is located between the first laying rollers (36).

8. A galvanized steel strip straightening method, which is applied to a galvanized steel strip straightening machine as claimed in claim 7, characterized in that: The following steps are involved: Step 1: Support the device with the base (1), power it on, and then drive it with the controller (2); Step 2: Stand the plate to be corrected and place it on the correction seat (32), and then use the first laying roller (36) in the limiting structure (3) to squeeze the plate onto the correction seat (32); Step 3: Then, the two flattening structures (4) are driven respectively to apply force to both ends of the plate, so as to correct the bent ends of the plate and fit them onto the correction seat (32); Step 4: If the two ends of the plate are twisted, the downward pressing structure (5) can be driven to apply force to the two ends of the plate to correct it.

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