Special-shaped blank crack repairing equipment and repairing method thereof

Abstract

The invention discloses special-shaped blank crack repairing equipment and a repairing method thereof, and relates to the technical field of special-shaped blank crack repairing. Comprising a bottom plate, three pairs of U-shaped clamping rails are fixedly arranged on the bottom plate, a translation sliding plate is clamped in each pair of U-shaped clamping rails, a fixed plate is fixedly arranged on the rear side edge of the bottom plate, a fixed connecting plate is arranged above the fixed plate, a pair of bent connecting plates are arranged on the two sides of the fixed connecting plate, and the fixed connecting plate and the bent connecting plates are fixedly connected with the three translation sliding plates respectively; three L-shaped hollowed-out supports are fixedly arranged on the bottom plate, notch gears are rotationally arranged in the corners of the L-shaped hollowed-out supports, bending swing arms are fixedly arranged on the notch portions of the notch gears, and the three bending swing arms and the three translation sliding plates are alternately distributed on the bottom plate. Through the double clamping effect, the clamping stability of the cracked special-shaped blank is enhanced, and the special-shaped blank is effectively prevented from accidentally moving or falling off in the repairing process.

Description

Technical Field

[0001] The invention relates to the technical field of profiled blank crack repairing, and in particular to profiled blank crack repairing equipment and a repairing method thereof. Background Art

[0002] During the production process of the continuous casting machine, due to production fluctuations and other reasons, longitudinal cracks may appear on the surface of the produced slab. For cracked slabs, they need to be fixed by clamping and repaired through a certain repair process.

[0003] The Chinese utility model patent discloses a slab surface longitudinal crack repair device (publication number: CN217965667U), which includes a horizontal long plate, a translation part, a lifting mechanism, a PLC and a mobile cutting mechanism; the horizontal long plate is located directly above the conveying roller, and the horizontal long plate is set on the ground through brackets at four ends; the translation part is set on the lower end surface of the horizontal long plate; the lifting mechanism is set on the translation part, and the mobile cutting mechanism is set on the lifting mechanism; the translation part includes a rotating part and a displacement mechanism; the rotating part is set on the lower end surface of the horizontal long plate, and the displacement mechanism is set on the rotating part.

[0004] For irregular shaped blanks, since the shape of the blanks may be relatively complex, it is difficult to clamp and fix them during repair. However, the repair device disclosed in the above patent and the existing repair equipment cannot stably clamp the cracked blanks, which makes it easy to move or shake during the repair process, thereby affecting the repair effect and efficiency. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and propose a device and method for repairing cracks in profiled blanks. The present invention adopts the following technical solutions: A device for repairing cracks in profiled blanks, comprising a bottom plate, three pairs of evenly distributed U-shaped rails are fixedly arranged on the left and right sides and the rear side of the top surface of the bottom plate, a slidably connected translation slide plate is clamped in each pair of the U-shaped rails, a fixed plate is fixedly arranged on the rear side of the bottom plate, a suspended fixed connecting plate is arranged above the fixed plate, a pair of staggeredly distributed bending connecting plates are arranged on the upper and lower sides of the fixed connecting plate, and the front end portion of the fixed connecting plate and the front end portions of the pair of bending connecting plates are respectively fixedly connected to the three translation slide plates; Three evenly distributed L-shaped hollow brackets are fixed on the left and right sides and the front side of the top surface of the base plate, and a notched gear is rotatably provided in the corner of each L-shaped hollow bracket. A bending swing arm is fixed in the notch part of each notched gear, and the three bending swing arms and three translation slides are alternately distributed on the base plate.

[0006] Preferably, a U-shaped groove is formed in the translation slide plate. A trapezoidal slider is slidably engaged in the middle of the U-shaped groove. First chamfers are formed at both ends of the trapezoidal slider. A pair of symmetrically distributed side sliders are slidably engaged on both sides in the U-shaped groove. Second chamfers are formed at the inner ends of each side slider.

[0007] Preferably, oval pin holes are formed in the trapezoidal slider and the pair of side sliders. Three limit pin shafts are fixedly arranged in the middle and on both sides in the U-shaped groove. The top end of each limit pin shaft is slidably inserted into the corresponding oval pin hole. A limit spring is fixedly arranged in the middle of each limit pin shaft, and the three limit springs are staggered.

[0008] Preferably, a first groove is formed at the outer end of each side slider. A first spring is fixedly arranged inside each first groove. A first T-shaped clamping block is fixedly arranged at the outer end of each first spring, and a pair of adjacent first T-shaped clamping blocks are staggeredly distributed.

[0009] Preferably, a pair of rectangular rings are fixedly arranged at the two corners at the rear side of the top surface of the fixed plate. The rear ends of the pair of bending connecting plates are respectively slidably inserted through the corresponding rectangular rings. An electric telescopic cylinder with a rearward telescopic end is fixedly arranged in the middle of the top surface of the fixed plate. The end of the telescopic rod of the electric telescopic cylinder is fixedly connected to the rear end of the fixed connecting plate.

[0010] Preferably, a pair of first racks are fixedly arranged on both sides of the fixed connecting plate. A second rack is fixedly arranged on the rear section of each bending connecting plate. A pair of linkage shafts are rotatably inserted into the rear side of the top surface of the fixed plate. A concentrically fixed linkage gear is sleeved on the top end of each linkage shaft. Each linkage gear is meshed and connected with the adjacent first rack and second rack.

[0011] Preferably, an obliquely distributed rectangular pressing block is fixedly arranged at the top end of each bending swing arm. A second groove is formed at the bottom end of each rectangular pressing block. A second spring is fixedly arranged inside each second groove. A second T-shaped clamping block is fixedly arranged at the outer end of each second spring.

[0012] Preferably, a triangular bracket is fixedly arranged in the middle of the bottom surface of the bottom plate. A circular through hole is formed in the middle of the triangular bracket. A servo motor with an upward output end is fixedly arranged inside the circular through hole. A concentrically fixed fixed disk is sleeved at the end of the motor shaft of the servo motor.

[0013] Preferably, the bottom surface of the fixed plate is hinged with three evenly distributed hinged rods, and the outer end of each hinged rod is provided with a movably hinged rectangular slide, each of the rectangular slides slides through the bottom of the L-shaped hollow bracket on the corresponding side, and each rectangular slide is fixed with a fixed rack, and each of the fixed racks is meshed and connected with the corresponding notched gear.

[0014] The present invention also proposes a repair method for a profiled blank crack repair device, comprising the following steps: Step 1: Place the cracked special-shaped blank in the middle of the top surface of the bottom plate, start the electric telescopic cylinder, control the telescopic rod of the electric telescopic cylinder to shorten, drive the fixed connecting plate and a pair of first racks to translate forward, the first racks are engaged to drive the linkage gear to rotate, and the linkage gears are engaged to drive the second rack and the bent connecting plate to slide backward along the rectangular ring, and then synchronously drive the three translation slides to translate toward the cracked special-shaped blank along the three pairs of U-shaped rails; Step 2: When the translation slide plate translates, under the tension of the three limit springs, the first T-shaped clamp block on one side is first driven to press against the cracked special-shaped blank, and then the first spring is driven to compress and deform, and then the side slider on one side slides backward along the limit pin shaft, and drives the trapezoidal slider to slide laterally along the limit pin shaft, and then drives the side slider on the other side to slide forward along the limit pin shaft, and then drives the first T-shaped clamp block on the other side to press against the cracked special-shaped blank, and the cracked special-shaped blank is preliminarily clamped and fixed by three pairs of first T-shaped clamp blocks; Step three, start the servo motor, the motor shaft of the servo motor drives the fixed plate to rotate synchronously, and under the hinged action of the hinged connecting rod, the rectangular slide plate is driven to slide outward along the L-shaped hollow bracket, and the fixed rack meshes to drive the notched gear and the bending swing arm to rotate toward the cracked special-shaped blank, and then drives the rectangular pressing block and the second T-shaped clamping block to rest on the special-shaped blank, and the cracked special-shaped blank is clamped and fixed again by three second T-shaped clamping blocks; Step 4: Repair the cracked special-shaped blanks, including defect detection, defect assessment, repair plan formulation, repair implementation, and repair quality inspection.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, under the action of the electric telescopic cylinder, three pairs of first T-shaped clamps can be synchronously driven to initially clamp and fix the cracked special-shaped blanks; the error and loss caused by the movement or shaking of the cracked special-shaped blanks during the repair process can be reduced, thereby ensuring the repair effect of the cracked special-shaped blanks; 2. In the present invention, under the action of the servo motor, three second T-shaped clamps can be synchronously driven to clamp and fix the cracked special-shaped blank again; ensuring that the cracked special-shaped blank maintains a fixed position and angle during the processing, which is beneficial to improving the repair accuracy, repair quality and repair efficiency; In summary, the present invention enhances the clamping stability of the cracked special-shaped blank through the double clamping effect, effectively prevents the cracked special-shaped blank from accidentally moving or falling off during the repair process, improves the safety of operation, and reduces the possibility of work accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an exploded schematic diagram of the overall structure of the present invention; Figure 3 It is a structural schematic diagram of the bottom plate and the fixing plate in the present invention; Figure 4 It is a structural schematic diagram of a fixed connecting plate and a pair of bent connecting plates in the present invention; Figure 5 It is an exploded schematic diagram of a fixed connecting plate and a pair of bent connecting plates in the present invention; Figure 6 It is an exploded schematic diagram of the translation slide in the present invention; Figure 7 It is a schematic diagram of the structure of three bending swing arms in the present invention; Figure 8 It is an exploded schematic diagram of three bent swing arms in the present invention; Serial numbers in the figure: 1. bottom plate; 11. U-shaped rail; 12. translation slide; 13. trapezoidal slider; 14. side slider; 15. first T-shaped clamp; 16. limit pin; 2. fixed plate; 21. electric telescopic cylinder; 22. fixed connecting plate; 23. rectangular ring; 24. bending connecting plate; 25. linkage gear; 3. L-shaped hollow bracket; 31. notched gear; 32. bending swing arm; 33. rectangular pressure block; 34. second T-shaped clamp; 4. triangular bracket; 41. servo motor; 42. fixed plate; 43. hinged connecting rod; 44. rectangular slide. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Embodiment 1: This embodiment provides a device for repairing cracks in profiled blanks. Figure 1-8, including a bottom plate 1. On the top surface of the bottom plate 1, three pairs of uniformly distributed U-shaped clamping rails 11 are fixedly arranged on the left and right sides and the rear side. A translation slide plate 12 that is slidably connected is clamped in each pair of U-shaped clamping rails 11. A fixing plate 2 is fixedly arranged on the rear side edge of the bottom plate 1. Above the fixing plate 2, a fixed connecting plate 22 is placed suspended. A pair of staggered bending connecting plates 24 are arranged on the upper and lower sides of the fixed connecting plate 22. The front end of the fixed connecting plate 22 and the front ends of the pair of bending connecting plates 24 are respectively fixedly connected to the three translation slide plates 12; On the left and right side edges and the front side edge of the top surface of the bottom plate 1, three uniformly distributed L-shaped hollow brackets 3 are fixedly arranged. A notched gear 31 is rotatably arranged inside the corner of each L-shaped hollow bracket 3. A bent swing arm 32 is fixedly arranged on the notched part of each notched gear 31. And the three bent swing arms 32 and the three translation slide plates 12 are alternately distributed on the bottom plate 1.

[0019] Embodiment 2: On the basis of Embodiment 1, this embodiment further includes the following content: As Figure 4 and Figure 6 shown, a 冂-shaped groove is formed in the translation slide plate 12. A trapezoidal slider 13 is slidably clamped in the middle of the 冂-shaped groove. First chamfers are formed at both ends of the trapezoidal slider 13. A pair of symmetrically distributed side sliders 14 are slidably clamped on both sides inside the 冂-shaped groove. Second chamfers are formed at the inner ends of each side slider 14; Elliptical pin holes are formed in the trapezoidal slider 13 and the pair of side sliders 14. Three limiting pin shafts 16 are fixedly arranged in the middle and on both sides inside the 冂-shaped groove. The top end of each limiting pin shaft 16 is slidably inserted into the corresponding elliptical pin hole. A limiting spring is fixedly arranged in the middle of each limiting pin shaft 16. And the three limiting springs are staggered; It should be noted that: in this embodiment, a first groove is formed at the outer end of each side slider 14. A first spring is fixedly arranged inside each first groove. A first T-shaped clamping block 15 is fixedly arranged at the outer end of each first spring. And a pair of adjacent first T-shaped clamping blocks 15 are staggered; When the translation slide plate 12 moves towards the special-shaped blank along the three pairs of U-shaped clamping rails 11, under the tension of the three limiting springs, a pair of side sliders 14 can be successively driven to slide forward, and the first T-shaped clamping blocks 15 are respectively driven to abut against the special-shaped blank, and the cracked special-shaped blank is preliminarily clamped and fixed by the three pairs of first T-shaped clamping blocks 15.

[0020] Embodiment 3: On the basis of Embodiment 2, this embodiment further includes the following content: As Figure 4 and Figure 5As shown, a pair of rectangular rings 23 are fixedly provided at the two corners on the rear side of the top surface of the fixed plate 2, and the rear ends of a pair of bent connecting plates 24 are respectively slidably inserted into the corresponding rectangular rings 23, and an electric telescopic cylinder 21 with a telescopic end facing backward is fixedly provided at the middle of the top surface of the fixed plate 2, and the end of the telescopic rod of the electric telescopic cylinder 21 is fixedly connected to the rear end of the fixed connecting plate 22; controlling the shortening of the telescopic rod of the electric telescopic cylinder 21 can drive the fixed connecting plate 22 and the pair of first racks to translate forward; A pair of first racks are fixed on both sides of the fixed connecting plate 22, and a second rack is fixed on the rear section of each bent connecting plate 24. A pair of linkage shafts are rotatably inserted on the rear side of the top surface of the fixed plate 2, and the top end of each linkage shaft is sleeved with a concentrically fixed linkage gear 25, and each linkage gear 25 is meshed and connected with the adjacent first rack and second rack; the meshing of the first rack drives the linkage gear 25 to rotate, and the linkage gear 25 then meshes to drive the second rack and the bent connecting plate 24 to slide backward along the rectangular ring 23.

[0021] The top end of each bending swing arm 32 is fixed with an obliquely distributed rectangular pressure block 33, the bottom end of each rectangular pressure block 33 is opened with a second groove, the interior of each second groove is fixed with a second spring, and the outer end of each second spring is fixed with a second T-shaped clamp block 34; the cracked special-shaped blank is clamped and fixed again by three second T-shaped clamp blocks 34.

[0022] Embodiment 4: Based on Embodiment 3, this embodiment also includes the following contents: like Figure 7 and Figure 8 As shown, a triangular bracket 4 is fixedly arranged in the middle of the bottom surface of the bottom plate 1, a circular through hole is opened in the middle of the triangular bracket 4, a servo motor 41 with an output end facing upward is fixedly arranged inside the circular through hole, and a concentrically fixed fixed disk 42 is sleeved on the motor shaft end of the servo motor 41; the motor shaft of the servo motor 41 drives the fixed disk 42 to rotate synchronously; The bottom surface of the fixed plate 42 is hinged with three evenly distributed hinged rods 43, and the outer end of each hinged rod 43 is provided with a movable hinged rectangular slide 44, each rectangular slide 44 slides through the bottom of the L-shaped hollow bracket 3 on the corresponding side, and each rectangular slide 44 is fixed with a fixed rack, and each fixed rack is meshed and connected with the corresponding notched gear 31; under the hinged action of the hinged rod 43, the rectangular slide 44 is driven to slide outward along the L-shaped hollow bracket 3, and the fixed rack meshes to drive the notched gear 31 and the bending swing arm 32 to rotate toward the cracked special-shaped blank.

[0023] Specifically, the working principle and operation method of the present invention are as follows: Step 1: Place the cracked special-shaped blank in the middle of the top surface of the bottom plate 1, start the electric telescopic cylinder 21, control the telescopic rod of the electric telescopic cylinder 21 to shorten, drive the fixed connecting plate 22 and a pair of first racks to translate forward, the first racks are engaged to drive the linkage gear 25 to rotate, and the linkage gear 25 is then engaged to drive the second rack and the bent connecting plate 24 to slide backward along the rectangular ring 23, and then synchronously drive the three translation slides 12 to translate toward the cracked special-shaped blank along the three pairs of U-shaped rails 11; Step 2: When the translation slide 12 translates, under the tension of the three limit springs, the first T-shaped clamp 15 on one side is first driven to press against the cracked special-shaped blank, and then the first spring is driven to compress and deform, and then the side slider 14 on one side slides backward along the limit pin 16, and drives the trapezoidal slider 13 to slide laterally along the limit pin 16, and then drives the side slider 14 on the other side to slide forward along the limit pin 16, and then drives the first T-shaped clamp 15 on the other side to press against the cracked special-shaped blank, and the cracked special-shaped blank is preliminarily clamped and fixed by three pairs of first T-shaped clamps 15; Step 3, start the servo motor 41, the motor shaft of the servo motor 41 drives the fixed plate 42 to rotate synchronously, and under the hinged action of the hinged connecting rod 43, drives the rectangular slide plate 44 to slide outward along the L-shaped hollow bracket 3, and the fixed rack meshes to drive the notched gear 31 and the bending swing arm 32 to rotate toward the cracked special-shaped blank, and then drives the rectangular pressing block 33 and the second T-shaped clamping block 34 to press against the cracked special-shaped blank, and the cracked special-shaped blank is clamped and fixed again by the three second T-shaped clamping blocks 34; Step 4: Repair the cracked special-shaped blanks, including defect detection, defect assessment, repair plan formulation, repair implementation, and repair quality inspection.

[0024] Specifically, firstly, the cracked special-shaped blanks are inspected in detail to determine the location, degree and type of cracking, and the causes of cracking are analyzed, such as material defects, improper production process, and improper heat treatment; Clean the cracked area and the surrounding debris and oil stains to ensure that the area to be repaired is clean. For areas with deeper cracks, grinding or cutting is required to facilitate subsequent repair work; Choose the appropriate repair method based on the severity and location of the crack; if the crack is shallow and located on the surface, use welding repair method; if the crack is deep or involves the internal structure, it is necessary to use cutting repair method or other more complex methods; Among them, the welding repair method is specifically: select appropriate welding methods and parameters to weld the cracks, and control the heat input during welding to avoid the generation of new thermal cracks; the cutting repair method is specifically: use flame cutting, plasma cutting, laser cutting to remove the cracks and part of the material around them, and then reconnect them; other repair methods include: mechanical correction, thermal correction, etc., which are carried out according to specific circumstances; After the repair is completed, the repaired area is post-processed, such as grinding and polishing, to ensure that the surface is flat and smooth; for the area repaired by welding, post-weld heat treatment is required to eliminate residual stress and improve the structural properties; Carry out quality inspection on the repaired special-shaped blanks to ensure that the repair effect meets the requirements; check whether there are new defects in the repaired area, and repair it again if necessary; record the key parameters and operation details of the repair process for subsequent analysis and improvement.

[0025] The present invention enhances the stable clamping of the cracked special-shaped blank during the repair process through the double clamping action, effectively prevents the cracked special-shaped blank from accidentally moving or falling off during the repair process, improves the safety of operation, and reduces the possibility of work accidents.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A profiled blank crack repairing device, characterized in that: It includes a bottom plate (1). On the left and right sides and the rear side of the top surface of the bottom plate (1), three pairs of uniformly distributed U-shaped card rails (11) are fixedly provided. A translation slide plate (12) that is slidably connected is clamped in each pair of the U-shaped card rails (11). A fixed plate (2) is fixedly provided on the rear side edge of the bottom plate (1). Above the fixed plate (2), a fixed connecting plate (22) is placed suspended. A pair of staggered bending connecting plates (24) are provided on the upper and lower sides of the fixed connecting plate (22). The front end of the fixed connecting plate (22) and the front ends of the pair of bending connecting plates (24) are respectively fixedly connected to the three translation slide plates (12). On the left and right side edges and the front side of the top surface of the bottom plate (1), three uniformly distributed L-shaped hollow brackets (3) are fixedly provided. A notched gear (31) is rotatably provided inside the corner of each L-shaped hollow bracket (3). A bending swing arm (32) is fixedly provided at the notched part of each notched gear (31). And the three bending swing arms (32) and the three translation slide plates (12) are alternately distributed on the bottom plate (1).

2. The device for repairing cracks of profiled blanks according to claim 1, characterized in that: A 冂-shaped groove is formed in the translation slide plate (12). A trapezoidal slider (13) is slidably clamped in the middle of the 冂-shaped groove. First chamfers are formed at both ends of the trapezoidal slider (13). A pair of symmetrically distributed side sliders (14) are slidably clamped on both sides inside the 冂-shaped groove. Second chamfers are formed at the inner ends of each side slider (14).

3. The device for repairing cracks of profiled blanks according to claim 2, characterized in that: Elliptical pin holes are formed in the trapezoidal slider (13) and the pair of side sliders (14). Three limit pin shafts (16) are fixedly provided in the middle and on both sides inside the 冂-shaped groove. The top end of each limit pin shaft (16) is slidably inserted into the corresponding elliptical pin hole. A limit spring is fixedly provided in the middle of each limit pin shaft (16). And the three limit springs are staggeredly distributed.

4. The device for repairing cracks of profiled blanks according to claim 3, characterized in that: A first groove is formed at the outer end of each side slider (14). A first spring is fixedly provided inside each first groove. A first T-shaped clamping block (15) is fixedly provided at the outer end of each first spring. And a pair of adjacent first T-shaped clamping blocks (15) are staggeredly distributed.

5. The device for repairing cracks of profiled blanks according to claim 4, characterized in that: A pair of rectangular rings (23) are fixedly provided at the two corners at the rear side of the top surface of the fixed plate (2). The rear ends of the pair of bending connecting plates (24) are respectively slidably inserted through the corresponding rectangular rings (23). And an electric telescopic cylinder (21) with a telescopic end facing backward is fixedly provided in the middle of the top surface of the fixed plate (2). The end of the telescopic rod of the electric telescopic cylinder (21) is fixedly connected to the rear end of the fixed connecting plate (22).

6. The device for repairing cracks of profiled blanks according to claim 5, characterized in that: A pair of first racks are fixedly provided on both sides of the fixed connecting plate (22). A second rack is fixedly provided on the rear section of each bending connecting plate (24). A pair of linkage shafts are rotatably inserted into the rear side of the top surface of the fixed plate (2). A concentrically fixed linkage gear (25) is sleeved on the top end of each linkage shaft. Each linkage gear (25) is meshed and connected to the adjacent first rack and second rack.

7. The device for repairing cracks of profiled blanks according to claim 6, characterized in that: The top end of each bending swing arm (32) is fixedly provided with an obliquely distributed rectangular pressing block (33), the bottom end of each rectangular pressing block (33) is provided with a second groove, the interior of each second groove is fixedly provided with a second spring, and the outer end of each second spring is fixedly provided with a second T-shaped clamping block (34).

8. The device for repairing cracks of profiled blanks according to claim 7, characterized in that: A triangular bracket (4) is fixedly provided in the middle of the bottom surface of the base plate (1), a circular through hole is provided in the middle of the triangular bracket (4), a servo motor (41) with an output end facing upward is fixedly provided inside the circular through hole, and a concentrically fixed fixing plate (42) is sleeved on the end of the motor shaft of the servo motor (41).

9. The device for repairing cracks of profiled blanks according to claim 8, characterized in that: The bottom surface of the fixed plate (42) is hingedly provided with three evenly distributed hinged connecting rods (43), and the outer end of each hinged connecting rod (43) is provided with a movable hinged rectangular slide plate (44), and each rectangular slide plate (44) slides through the bottom of the L-shaped hollow bracket (3) on the corresponding side, and each rectangular slide plate (44) is fixedly provided with a fixed rack, and each fixed rack is meshedly connected with the corresponding notched gear (31).

10. The method for repairing a profiled blank crack repair device according to claim 9, characterized in that: The following steps are involved: Step 1, placing the cracked special-shaped blank in the middle of the top surface of the bottom plate (1), starting the electric telescopic cylinder (21), controlling the telescopic rod of the electric telescopic cylinder (21) to shorten, driving the fixed connecting plate (22) and a pair of first racks to translate forward, the first racks engage to drive the linkage gear (25) to rotate, the linkage gear (25) then engages to drive the second rack and the bending connecting plate (24) to slide backward along the rectangular ring (23), and then synchronously drives the three translation slides (12) to translate along the three pairs of U-shaped rails (11) toward the cracked special-shaped blank; Step 2: When the translation slide plate (12) translates, under the tension of the three limit springs, the first T-shaped clamp block (15) on one side is first driven to press against the cracked special-shaped blank, and then the first spring is driven to compress and deform, and then the side slider (14) on one side slides backward along the limit pin (16), and drives the trapezoidal slider (13) to slide laterally along the limit pin (16), and then drives the side slider (14) on the other side to slide forward along the limit pin (16), and then drives the first T-shaped clamp block (15) on the other side to press against the cracked special-shaped blank, and the cracked special-shaped blank is initially clamped and fixed by three pairs of first T-shaped clamp blocks (15); Step 3, starting the servo motor (41), the motor shaft of the servo motor (41) drives the fixed plate (42) to rotate synchronously, and under the hinged action of the hinged connecting rod (43), drives the rectangular slide plate (44) to slide outward along the L-shaped hollow bracket (3), and the fixed rack meshes to drive the notched gear (31) and the bending swing arm (32) to rotate toward the cracked special-shaped blank, and then drives the rectangular pressing block (33) and the second T-shaped clamping block (34) to abut against the cracked special-shaped blank, and the cracked special-shaped blank is clamped and fixed again by the three second T-shaped clamping blocks (34); Step 4: Repair the cracked special-shaped blanks, including defect detection, defect assessment, repair plan formulation, repair implementation, and repair quality inspection.

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