An apparatus for detecting internal defects of a hinge beam

Abstract

This utility model discloses a device for detecting internal defects in hinge beams, comprising a dual-station alternating detection component, including a first-station detection platform and a second-station detection platform symmetrically arranged on the left and right, and an embedded centering and alignment mechanism; a detection component, including a six-axis robotic arm and internal detection probes located at the end of the six-axis robotic arm that scan the outer surface of the hinge beam one by one according to a preset path trajectory; and a three-axis travel mechanism, including a lateral travel component for switching between the two stations and for the lateral movement of the six-axis robotic arm, a longitudinal travel component for the longitudinal movement of the six-axis robotic arm, and a vertical travel component for the vertical movement of the six-axis robotic arm. This utility model adopts a dual-station alternating detection mode, realizing parallel operation of detection and loading / unloading. When the hinge beam at one station is being scanned and detected, the operator can simultaneously complete the unloading and clamping operations at the other station. The three-axis travel mechanism drives the detection component to move between the two stations, eliminating equipment waiting time.

Description

Technical Field

[0001] This utility model belongs to the technical field of hinge beam production equipment, and in particular relates to a device for detecting internal defects in hinge beams. Background Technology

[0002] Hinge beams are critical load-bearing components in ultra-high pressure equipment such as six-sided jacking presses. Because hinge beams typically operate under extreme conditions (such as high temperature, high pressure, and alternating loads), their internal quality directly affects the safe operation and service life of the entire equipment. After precision casting, hinge beams may develop internal defects such as cracks, shrinkage cavities, and inclusions, which can become stress concentration points, leading to sudden fatigue fracture during service and causing significant economic losses or even safety accidents.

[0003] Currently, conventional techniques for non-destructive testing (NDT) of large forgings and castings mainly include: manual ultrasonic testing, where inspectors scan the hinge beam surface with a handheld probe. This method is highly dependent on the operator's experience and skill, prone to errors in the scanned area of ​​the hinge beam surface, and inefficient with high labor intensity; fixed flaw detectors, where the workpiece needs to be hoisted to a fixed position and inspected using a single probe or simple scanning device. Such equipment often lacks efficient positioning and clamping systems, and the loading, unloading, and alignment time can even exceed the inspection itself, and it is difficult to fully cover the surface of complex-shaped workpieces; automated NDT systems, some advanced systems employ automation technology, such as multi-axis scanning mechanisms or robots. However, these systems are usually single-station designs, and the inspection efficiency is still limited by the loading and unloading time. Furthermore, when dealing with heavy workpieces like hinge beams, they lack efficient and accurate automatic alignment solutions, still requiring significant manual intervention to adjust the workpiece's posture to ensure the accuracy of the inspection path. Therefore, there is an urgent need in this field for a specialized device capable of highly automated, efficient, and accurate inspection of internal defects in hinge beams to overcome many bottlenecks in existing technologies. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device for detecting internal defects in hinge beams, so as to solve the technical problems mentioned in the background art.

[0005] This utility model provides the following technical solution: A device for detecting internal defects in a hinge beam, comprising: The dual-station alternating detection component includes a first-station detection platform and a second-station detection platform symmetrically arranged on the left and right. The upper middle part of the first-station detection platform and the second-station detection platform are respectively provided with a centering and alignment mechanism for correcting the attitude of the hinge beam. The centering and alignment mechanism includes a centering movable block located inside the beam body. The side of the centering movable block is provided with a pushing component along its axial direction for centering the hinge beam. The centering movable block can drive the hinge beam to rotate around the axis through the driving component to adjust the angle of the hinge beam. The detection component includes a six-axis robotic arm and an internal detection probe located at the end of the six-axis robotic arm that scans the outer surface of the hinge beam one by one according to a preset path trajectory. The three-axis travel mechanism includes a lateral travel assembly for switching between two workstations and for the lateral movement of the six-axis robotic arm, a longitudinal travel assembly for the longitudinal movement of the six-axis robotic arm, and a vertical travel assembly for the vertical movement of the six-axis robotic arm.

[0006] Preferably, the drive assembly includes a drive shaft, which is vertically mounted on the center of the first workstation detection platform via a first bearing. The upper end of the drive shaft is located at the lower center of the centrally located movable block, and the lower end of the drive shaft is connected to the output shaft of a reducer. The input shaft of the reducer is connected to the rotating shaft of a first motor. The first motor is a servo motor.

[0007] Preferably, the pushing assembly includes a plurality of first telescopic cylinders, the axial direction of which is arranged radially along the central movable block, the cylinder body of which is located inside the central movable block, and the piston rod of which is provided with a first push plate, the outer end face of which is an arc surface with the same curvature as the inner wall of the beam; the plurality of first telescopic cylinders are arranged sequentially at equal intervals along the axial direction of the central movable block. The plurality of first telescopic cylinders extend and retract synchronously.

[0008] Preferably, the upper end of the central movable block is further provided with a plurality of second telescopic cylinders arranged vertically upwards. The cylinder body of the second telescopic cylinder is located inside the central movable block, and the piston rods of the plurality of second telescopic cylinders are connected to a first top plate. The plurality of second telescopic cylinders are arranged at equal intervals along the axial direction of the central movable block, and the plurality of second telescopic cylinders work synchronously. The plurality of second telescopic cylinders extend and retract synchronously.

[0009] Preferably, the lateral travel assembly includes a first lateral base and a second lateral base symmetrically arranged on the front and rear sides of the first and second workstation detection platforms. The first lateral base contains a first lead screw and a second motor for driving the lead screw to rotate. A plurality of first ball bearing nuts are fitted onto the first lead screw, and a first movable seat is connected to each of the first ball bearing nuts. A first longitudinal base is positioned above the first movable seat, and the first longitudinal base is connected to the first movable seat via a first support rod. The second lateral base contains a second lead screw and a third motor for driving the second lead screw to rotate. A plurality of second ball bearing nuts are fitted onto the second lead screw, and a second movable seat is connected to each of the second ball bearing nuts. A second longitudinal base is positioned above the second movable seat, and the second longitudinal base is connected to the second movable seat via a second support rod.

[0010] Preferably, the first transverse base and the second transverse base are U-shaped channel steels. The first lead screw is disposed in the U-shaped groove of the first transverse base. The two ends of the first lead screw are respectively connected to the first transverse base through bearings. The upper end surface of the first transverse base is provided with a first guide rod in the transverse direction. The two ends of the first guide rod are respectively connected to the first transverse base through a first connecting seat. The first movable seat is provided with a first guide hole that matches the first guide rod.

[0011] Preferably, the second lead screw is disposed in the U-shaped groove of the second transverse base, and the two ends of the second lead screw are respectively connected to the second transverse base through bearings. The upper end surface of the second transverse base is provided with a second guide rod in the transverse direction. The two ends of the second guide rod are respectively connected to the second transverse base through a second connecting seat. The second movable seat is provided with a second guide hole adapted to the second guide rod.

[0012] Preferably, the longitudinal stroke assembly includes a third lead screw and a third guide rod disposed between the first longitudinal base and the second longitudinal base. A third ball nut block is adapted to the third lead screw, and a third guide slider is adapted to the third guide rod. A third movable seat is provided at the lower end of the third ball nut block and the third guide slider. A fourth motor for driving the third lead screw to rotate is provided on the outer side of the first longitudinal base.

[0013] Preferably, the vertical stroke assembly includes a vertical plate disposed on the lower end face of the third movable seat. A fourth lead screw and a fourth guide rail are disposed vertically on the front end face of the vertical plate. A fourth ball nut block is adapted to the fourth lead screw, and a fourth guide slider is adapted to the fourth guide rail. A fourth movable seat is disposed at the front end of the fourth ball nut block and the fourth guide slider. The base of the six-axis robotic arm is disposed on the front end face of the fourth movable seat. A fifth motor for driving the fourth lead screw to rotate is disposed on the third movable seat.

[0014] Preferably, the aforementioned.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention provides a hinge beam internal defect detection device. By setting up a dual-station alternating detection component and adopting a dual-station alternating detection mode, the detection and loading / unloading operations are realized in parallel. When the hinge beam on one station is being scanned and detected, the operator can simultaneously complete the unloading and clamping operations on the other station. The three-axis stroke mechanism drives the detection component to move between the two stations, eliminating equipment waiting time and theoretically increasing the detection efficiency by nearly 100%. It is particularly suitable for batch detection scenarios.

[0016] (2) The present invention provides a hinge beam internal defect detection device. By setting a three-axis stroke mechanism and combining it with a six-axis robotic arm, the three-axis stroke mechanism provides a wide range, high rigidity and high precision macroscopic positioning. The six-axis robotic arm gives the end internal detection probe a high degree of freedom of movement, so that it can flexibly adjust its posture and fit the complex curved surface of the hinge beam at the optimal angle. This ensures that the internal detection probe can maintain the best acoustic coupling conditions throughout the scanning path, which significantly improves the integrity of the detection area and the defect detection rate of the hinge beam surface. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a top view of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the first station testing platform of this utility model.

[0020] Figure 3 This is a schematic diagram of the centering and alignment mechanism of this utility model.

[0021] Figure 4 This is a schematic diagram of the transverse stroke component structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the longitudinal stroke component structure of this utility model.

[0023] Figure 6 This is a schematic diagram of the vertical stroke component structure of this utility model.

[0024] In the diagram: 2. First station inspection platform; 3. Second station inspection platform; 41. Centered movable block; 42. Drive shaft; 43. First bearing; 44. Reducer; 45. First motor; 46. First telescopic cylinder; 47. First push plate; 48. Second telescopic cylinder; 49. First top plate; 410. First distance sensor; 411. Second distance sensor; 412. Third distance sensor; 51. Internal inspection probe; 52. Six-axis robotic arm; 71. First transverse base; 72. Second transverse base; 73. First lead screw; 74. First ball bearing nut block; 75. ... 76. First guide rod; 77. First movable seat; 78. First support rod; 79. First longitudinal base; 710. Second longitudinal base; 8. Longitudinal stroke assembly; 81. Third lead screw; 82. Third guide rod; 83. Third ball nut block; 84. Third guide slider; 85. Third movable seat; 86. Fourth motor; 91. Vertical plate; 92. Fourth lead screw; 93. Fourth movable seat; 94. Fourth guide rail; 95. Fifth motor; 10. Hinge beam; 101. First ear wall; 102. Second ear wall; 103. Third ear wall; 104. Beam body. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] This utility model provides a device for detecting internal defects in a hinge beam, referenced. Figure 1-6As shown, the device includes a dual-station alternating detection component, which comprises a first-station detection platform 2 and a second-station detection platform 3 arranged symmetrically on the left and right. The upper middle part of the first-station detection platform 2 and the second-station detection platform 3 are respectively provided with a centering and alignment mechanism for correcting the posture of the hinge beam 10. The centering and alignment mechanism includes a centering movable block 41 located inside the beam body 104. The side of the centering movable block 41 is provided with a pushing component along its axial direction for centering the hinge beam 10. The centering movable block 41 can drive the hinge beam 10 to rotate around the axis through the driving component to adjust the angle of the hinge beam 10. It also includes a detection component, which includes a six-axis robotic arm 52 and an internal detection probe 51 located at the end of the six-axis robotic arm 52 to scan the outer surface of the hinge beam 10 one by one according to a preset path trajectory. It also includes a three-axis travel mechanism, which includes a lateral travel component for switching between two workstations and for the lateral movement of the six-axis robotic arm 52, a longitudinal travel component for the longitudinal movement of the six-axis robotic arm 52, and a vertical travel component for the vertical movement of the six-axis robotic arm 52.

[0028] The drive assembly includes a drive shaft 42, which is vertically mounted in the middle of the first station inspection platform 2 via a first bearing 43. The upper end of the drive shaft 42 is located at the lower center of the centrally located movable block 41. The lower end of the drive shaft 42 is connected to the output shaft of a reducer 44, and the input shaft of the reducer 44 is connected to the rotating shaft of a first motor 45. The first motor is a servo motor. The dual-station alternating inspection component enables parallel operation of inspection and loading / unloading. When the hinge beam 10 at one station is undergoing scanning inspection, the operator can simultaneously complete unloading and clamping operations at the other station. The three-axis stroke mechanism drives the inspection component to move between the two stations, eliminating equipment waiting time and theoretically increasing inspection efficiency by nearly double, making it particularly suitable for batch inspection scenarios. By setting up a three-axis travel mechanism and combining it with a six-axis robotic arm, the three-axis travel mechanism provides a wide range, high rigidity, and high precision macroscopic positioning. The six-axis robotic arm 52 gives the end-effector internal detection probe 51 a high degree of freedom of movement, enabling it to flexibly adjust its posture and fit the complex curved surface of the hinge beam 10 at the optimal angle. This ensures that the internal detection probe 51 maintains the best acoustic coupling conditions throughout the scanning path, significantly improving the integrity of the detection area and the defect detection rate on the surface of the hinge beam 10.

[0029] The pushing assembly includes a plurality of first telescopic cylinders 46. The axial direction of the first telescopic cylinders 46 is arranged radially along the centering movable block 41. The cylinder body of the first telescopic cylinder 46 is located inside the centering movable block 41. The piston rod of the first telescopic cylinder 46 is provided with a first push plate 47. The outer end face of the first push plate 47 is an arc surface with the same curvature as the inner wall of the beam 104. The plurality of first telescopic cylinders 46 are arranged at equal intervals along the axial direction of the centering movable block 41. The plurality of first telescopic cylinders 46 extend and retract synchronously. When the hinge beam 10 is hoisted onto the first station inspection platform 2, its slot 104 is placed downwards, and the centering movable block 41 is located inside the slot of the beam 104. Then, through the synchronous extension of the first telescopic cylinders 46, the first push plate 47 can push the inner wall of the beam 104 to achieve the centering adjustment of the hinge beam 10. After the centering adjustment is completed, the first telescopic cylinders 46 retract synchronously.

[0030] The upper end of the central movable block 41 is also provided with a plurality of vertically upward-arranged second telescopic cylinders 48. The cylinder body of the second telescopic cylinders 48 is located inside the central movable block 41, and the piston rods of the plurality of second telescopic cylinders 48 are connected to the first top plate 49. The plurality of second telescopic cylinders 48 are arranged at equal intervals along the axial direction of the central movable block 41, and the plurality of second telescopic cylinders 48 work synchronously. The plurality of second telescopic cylinders 48 extend and retract synchronously. After the hinge beam 10 is centered and adjusted, the synchronous extension of the second telescopic cylinder 48 causes the first top plate 49 to contact the bottom of the groove of the beam body 104, thus lifting the hinge beam 10 to a certain height. Then, the operation of the first motor 45 drives the drive shaft 42 to rotate around the axis, which in turn drives the centered movable block 41 and the hinge beam 10 to rotate slowly around the axis, thereby adjusting the angle of the hinge beam 10. Then, the retraction of the second telescopic cylinder 48 causes the hinge beam 10 to fall onto the first station detection platform 2, so that the posture of the hinge beam 10 matches the position of the internal detection probe 51 when it detects according to the preset path trajectory, which facilitates the subsequent detection by the internal detection probe 51.

[0031] Furthermore, as one implementation method, refer to Figure 2 and Figure 3The hinge beam 10 includes a beam body 104. Three ear-shaped lugs are symmetrically arranged on the left and right sides of the beam body 104, and two ear-shaped lugs are symmetrically arranged on the front and rear sides of the beam body 104. The three ear-shaped lugs include a first ear-shaped lug 101, a second ear-shaped lug 102, and a third ear-shaped lug 103. A first distance sensor 410, a second distance sensor 411, and a third distance sensor 412 are arranged below the three ear-shaped lugs on the left side of the first workstation detection platform 2. The second distance sensor 411 is located directly below the second ear-shaped lug 102. The first distance sensor 410 is located on the lower end of the first ear-shaped lug 101, away from the second ear-shaped lug 102. The third distance sensor 412 is located on the lower end of the third ear-shaped lug 103, away from the second ear-shaped lug 102. During the slow rotation of the central movable block 41 and the hinge beam 10 around the axis, when the first ear wall 101, the second ear wall 102, and the third ear wall 103 respectively block the first distance sensor 410, the second distance sensor 411, and the third distance sensor 412, the first motor 45 stops working, thus adjusting the angle of the hinge beam 10. The first distance sensor 410 is located on the lower end of the first ear wall 101 away from the second ear wall 102, and the third distance sensor 412 is located on the lower end of the third ear wall 103 away from the second ear wall 102, as shown in the reference [reference needed]. Figure 2 At this point, the posture is adjusted to the correct position. When the hinge beam 10 continues to rotate clockwise, the third ear wall 103 will lose its obstruction of the third distance sensor 412, thus determining that the posture adjustment is not complete. When the hinge beam 10 continues to rotate counterclockwise, the first ear wall 101 will lose its obstruction of the first distance sensor 410, thus determining that the posture adjustment is not complete. Only when the first ear wall 101, the second ear wall 102, and the third ear wall 103 obstruct the first distance sensor 410, the second distance sensor 411, and the third distance sensor 412 respectively, will the posture adjustment be determined to be complete. This setting can improve the accuracy of the hinge beam 10 angle adjustment and replace manual judgment.

[0032] The transverse travel assembly includes a first transverse base 71 and a second transverse base 72 symmetrically arranged on the front and rear sides of the first workstation detection platform 2 and the second workstation detection platform 3. The first transverse base 71 has a first lead screw 73 and a second motor 75 for driving the first lead screw 73 to rotate. Several first ball bearing nut blocks 74 are fitted onto the first lead screw 73, and a first movable seat 77 is connected to each ball bearing nut block 74. A first longitudinal base 79 is located above the first movable seat 77 and is connected to the first movable seat 77 via a first support rod 78. The second transverse base 72 has a second lead screw and a third motor for driving the second lead screw to rotate. Several second ball bearing nut blocks are fitted onto the second lead screw, and a second movable seat is connected to each ball bearing nut block. A second longitudinal base 710 is located above the second movable seat and is connected to the second movable seat via a second support rod. The first transverse base 71 and the second transverse base 72 are selected as U-shaped channel steel. The second motor 75 and the third motor work synchronously. Through the synchronous operation of the second motor 75 and the third motor, the first lead screw 73 and the second lead screw can be driven to rotate synchronously, thereby causing the first movable seat 77 and the second movable seat to move synchronously in the lateral direction, thereby driving the lateral movement of the detection component and the switching between the two workstations.

[0033] The first lead screw 73 is disposed within the U-shaped groove of the first transverse base 71. Both ends of the first lead screw 73 are connected to the first transverse base 71 via bearings. A first guide rod 76 is provided transversely on the upper surface of the first transverse base 71. Both ends of the first guide rod 76 are connected to the first transverse base 71 via first connecting seats. A first guide hole adapted to the first guide rod 76 is provided on the first movable seat 77. The second lead screw is disposed within the U-shaped groove of the second transverse base. Both ends of the second lead screw are connected to the second transverse base 72 via bearings. A second guide rod is provided transversely on the upper surface of the second transverse base 72. Both ends of the second guide rod are connected to the second transverse base 72 via second connecting seats. A second guide hole adapted to the second guide rod is provided on the second movable seat. The first guide rod 76 and the second guide rod improve the stability of the first movable seat 77 and the second movable seat during transverse movement, thereby improving the stability of the detection component during transverse movement.

[0034] The longitudinal travel assembly includes a third lead screw 81 and a third guide rod 82 disposed between the first longitudinal base 79 and the second longitudinal base 710. A third ball bearing nut block 83 is fitted onto the third lead screw 81, and a third guide slider 84 is fitted onto the third guide rod 82. A third movable seat 85 is provided at the lower end of the third ball bearing nut block 83 and the third guide slider 84. A fourth motor 86 for driving the rotation of the third lead screw 81 is disposed on the outer side of the first longitudinal base 79. The axial direction of the third lead screw 81 and the third guide rod 82 is longitudinal. The fourth motor 86 is a servo motor. The operation of the fourth motor 86 drives the rotation of the third lead screw 81, thereby causing the third movable seat 85 to move longitudinally, realizing the longitudinal movement of the detection component.

[0035] The vertical travel assembly includes a vertical plate 91 located on the lower end face of the third movable seat 85. A fourth lead screw 92 and a fourth guide rail 94 are vertically arranged on the front end face of the vertical plate 91. A fourth ball bearing nut block is fitted onto the fourth lead screw 92, and a fourth guide slider is fitted onto the fourth guide rail 94. A fourth movable seat 93 is located at the front end of the fourth ball bearing nut block and the fourth guide slider. The base of the six-axis robotic arm 52 is located on the front end face of the fourth movable seat 93. A fifth motor 95, a servo motor, is mounted on the third movable seat 85 to drive the rotation of the fourth lead screw 92. The operation of the fifth motor 95 drives the rotation of the fourth lead screw 92, thereby causing the fourth movable seat 93 to move vertically, thus realizing the vertical movement of the detection component. This device realizes the entire process from loading the hinge beam 10, automatic alignment, dual-station switching, adaptive scanning to detection completion. The entire process is highly automated, reducing manual intervention.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A hinge beam internal defect detection apparatus characterized by, include: The dual-station alternating detection component includes a first station detection platform (2) and a second station detection platform (3) arranged symmetrically on the left and right. The upper middle part of the first station detection platform (2) and the second station detection platform (3) are respectively provided with a centering and alignment mechanism for correcting the posture of the hinge beam (10). The centering and alignment mechanism includes a centering movable block (41) located inside the beam body (104). The side of the centering movable block (41) is provided with a pushing component along its axial direction for centering the hinge beam (10). The centering movable block (41) can drive the hinge beam (10) to rotate around the axis through the driving component to adjust the angle of the hinge beam (10). The detection components include a six-axis robotic arm (52) and an internal detection probe (51) located at the end of the six-axis robotic arm (52) to scan the outer surface of the hinge beam (10) one by one according to a preset path trajectory. The three-axis travel mechanism includes a lateral travel assembly for switching between two workstations and for the lateral movement of the six-axis robotic arm (52), a longitudinal travel assembly for the longitudinal movement of the six-axis robotic arm (52), and a vertical travel assembly for the vertical movement of the six-axis robotic arm (52).

2. The device for detecting internal defects of a hinge beam according to claim 1, wherein The drive assembly includes a drive shaft (42), which is vertically mounted on the middle of the first workstation detection platform (2) via a first bearing (43). The upper end of the drive shaft (42) is located at the lower middle of the central movable block (41). The lower end of the drive shaft (42) is connected to the output shaft of the reducer (44), and the input shaft of the reducer (44) is connected to the rotating shaft of the first motor (45).

3. The apparatus for detecting internal defects of a hinge beam according to claim 2, wherein The pushing assembly includes a plurality of first telescopic cylinders (46), the axial direction of the first telescopic cylinders (46) is arranged radially along the central movable block (41), the cylinder body of the first telescopic cylinders (46) is located inside the central movable block (41), the piston rod of the first telescopic cylinders (46) is provided with a first push plate (47), the outer end face of the first push plate (47) is an arc surface with the same curvature as the inner wall of the beam (104); the plurality of first telescopic cylinders (46) are arranged sequentially at equal intervals along the axial direction of the central movable block (41).

4. The apparatus for detecting internal defects of a hinge beam according to claim 3, wherein The upper end of the central movable block (41) is also provided with a plurality of second telescopic cylinders (48) arranged vertically upward. The cylinder body of the second telescopic cylinder (48) is located inside the central movable block (41), and the piston rods of the plurality of second telescopic cylinders (48) are connected to the first top plate (49). The plurality of second telescopic cylinders (48) are arranged at equal intervals along the axial direction of the central movable block (41), and the plurality of second telescopic cylinders (48) work synchronously.

5. The device for detecting internal defects of a hinge beam according to claim 1, wherein The lateral travel assembly includes a first lateral base (71) and a second lateral base (72) symmetrically arranged on the front and rear sides of the first workstation detection platform (2) and the second workstation detection platform (3); the first lateral base (71) has a first lead screw (73) and a second motor (75) for driving the first lead screw (73) to rotate inside it. The first lead screw (73) is fitted with a plurality of first ball nut blocks (74), and a first movable seat (77) is connected to the first ball nut blocks (74). The first movable seat (77) is located above the first movable seat (77). A first longitudinal base (79) is provided, which is connected to the first movable seat (77) via a first support rod (78); a second transverse base (72) is provided with a second lead screw and a third motor for driving the second lead screw to rotate inside the second lead screw, and a plurality of second ball nut blocks are adapted on the second lead screw, and a second movable seat is connected to the second ball nut blocks. A second longitudinal base (710) is provided above the second movable seat, and the second longitudinal base (710) is connected to the second movable seat via a second support rod.

6. The apparatus for detecting internal defects of a hinge beam according to claim 5, wherein The longitudinal stroke assembly includes a third lead screw (81) and a third guide rod (82) disposed between the first longitudinal base (79) and the second longitudinal base (710). A third ball nut block (83) is adapted on the third lead screw (81), and a third guide slider (84) is adapted on the third guide rod (82). A third movable seat (85) is provided at the lower end of the third ball nut block (83) and the third guide slider (84). A fourth motor (86) for driving the third lead screw (81) to rotate is provided on the outer side of the first longitudinal base (79).

7. The device for detecting internal defects of a hinge beam according to claim 6, wherein The vertical stroke assembly includes a vertical plate (91) located on the lower end face of the third movable seat (85). A fourth lead screw (92) and a fourth guide rail (94) are vertically arranged on the front end face of the vertical plate (91). A fourth ball nut block is adapted on the fourth lead screw (92), and a fourth guide slider is adapted on the fourth guide rail (94). A fourth movable seat (93) is provided at the front end of the fourth ball nut block and the fourth guide slider. The base of the six-axis robotic arm (52) is located on the front end face of the fourth movable seat (93). A fifth motor (95) for driving the fourth lead screw (92) to rotate is provided on the third movable seat (85).

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