Welded steel plate surface quality detection system

Abstract

The welded steel plate surface quality detection system comprises a machine table which is horizontally penetrated by a steel plate conveying device, an image acquisition device is arranged at the top of the machine table, and a steel plate turn-over device is arranged at the lower part of the machine table; the image acquisition device comprises a front image acquisition part and a rear image acquisition part, and the front image acquisition part and the rear image acquisition part correspondingly acquire front and back plate surface images of a welded steel plate respectively; the steel plate turnover device comprises a left steel plate turnover arm and a right steel plate turnover arm, and the left steel plate turnover arm and the right steel plate turnover arm are arranged on the two sides of the steel plate conveying device. And the left steel plate turn-over arm and the right steel plate turn-over arm convert the front plate surface and the back plate surface of the welded steel plate through synchronous clamping, lifting and turn-over actions. Full-automatic quality detection of the surface of the welded steel plate is achieved, the front plate face and the back plate face of the welded steel plate are covered at the same time in detection, detection comprehensiveness and accuracy are effectively guaranteed, and detection efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding steel plate surface quality detection, and in particular relates to a welding steel plate surface quality detection system. Background Art

[0002] With the changes of the times, technology is also constantly innovating and iterating. From the construction of bridges and ships to the production, research and development of chips, there are certain inspection requirements for the surface quality of modern welded steel plates. Most industries in modern industry are based on steel plates; from bridges and elevated buildings to the production of equipment chips and precision instruments, they are closely related to steel plates and are indispensable. At present, my country occupies a large enough international market in the steel plate industry, and the corresponding domestic market is also spread throughout the country. Relatively speaking, the basic surface inspection technology of welded steel plates does not have more relevant scientific and technological technologies to popularize and improve, and is generally still in the stage of manual naked eye inspection, which is slow and inefficient. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a surface quality inspection system for welded steel plates, which not only realizes fully automatic quality inspection of the surface of welded steel plates, but also covers the front and back surfaces of welded steel plates at the same time, effectively ensuring the comprehensiveness and accuracy of inspection and improving inspection efficiency.

[0004] Technical solution: To achieve the above-mentioned purpose, a surface quality detection system for welded steel plates of the present invention comprises a machine platform that passes horizontally through a steel plate conveying device, an image acquisition device located above the steel plate conveying device is arranged on the top of the machine platform, and a steel plate flipping device located on the side of the steel plate conveying device is arranged at the bottom of the machine platform; the image acquisition device comprises a front image acquisition part and a rear image acquisition part along the conveying direction of the welded steel plate conveyed by the steel plate conveying device, the front image acquisition part and the rear image acquisition part respectively correspond to the collection of the front and back plate images of the welded steel plate, and a light source device is arranged between the front image acquisition part and the rear image acquisition part; the steel plate flipping device comprises a left steel plate flipping arm and a right steel plate flipping arm arranged on both sides of the steel plate conveying device, when the steel plate conveying device conveys the welded steel plate to the position between the front image acquisition part and the rear image acquisition part, the left steel plate flipping arm and the right steel plate flipping arm convert the front and back plate surfaces of the welded steel plate through synchronous clamping, lifting and flipping actions.

[0005] Furthermore, the front image acquisition unit and the rear image acquisition unit have the same structure; the front image acquisition unit or the rear image acquisition unit includes a mounting seat, a camera motion adjustment mechanism and an industrial camera, the industrial camera is arranged on the machine platform through the camera motion adjustment mechanism and the mounting seat, and the camera motion adjustment mechanism can drive the industrial camera to rise and fall to adjust the object distance between the industrial camera and the welding steel plate on the steel plate conveying device.

[0006] Furthermore, the light source device includes a strip light source, a swing shaft, a swing driving unit and a base; the swing driving unit is installed on the machine platform through the base, and the strip light source is connected to the swing driving unit through the swing shaft; the swing driving unit drives the swing shaft to drive the strip light source to swing forward and backward in the conveying direction of the steel plate conveying device, so as to adjust the lighting direction respectively corresponding to the front image acquisition unit and the rear image acquisition unit.

[0007] Furthermore, the left steel plate flipping arm and the right steel plate flipping arm have the same structure; the left steel plate flipping arm or the right steel plate flipping arm comprises a lifting mechanism and a clamping and flipping composite mechanism, and the clamping and flipping composite mechanism is installed on the machine platform through the lifting mechanism;

[0008] When the two clamping and flipping composite mechanisms of the left steel plate flipping arm and the right steel plate flipping arm cooperate to clamp the welded steel plate, the lifting mechanism drives the clamping and flipping composite mechanism to rise until the welded steel plate is separated from the steel plate conveying device, and the clamping and flipping composite mechanism drives the welded steel plate to flip;

[0009] The lifting mechanism drives the clamping and flipping composite mechanism to descend until the welding steel plate is close to the steel plate conveying device, and the two clamping and flipping composite mechanisms of the left steel plate flipping arm and the right steel plate flipping arm cooperate to release the welding steel plate, so that the welding steel plate falls onto the steel plate conveying device.

[0010] Furthermore, the lifting mechanism includes a lifting beam installed on the machine platform through a vertical linear servo slide module lifting activity; the clamping and flipping composite mechanism includes a turntable installed on the lifting beam through a rotating shaft, a clamp fixedly connected to the turntable through a connecting rod, and a transverse cylinder installed on the lifting beam; the power input end of the rotating shaft is connected to a flip servo motor; the rotating shaft includes an integrally formed cylindrical shaft body and a square shaft body, the cylindrical shaft body is rotationally connected to the lifting beam, and the square shaft body is axially slidingly connected to the turntable; the outer ring of the turntable is circumferentially grooved to form an annular groove, and an axial limit head is provided on the telescopic rod of the transverse cylinder, and the axial limit head radially extends into the annular groove, so that the axial limit head and the turntable are axially limited and circumferentially slidingly connected.

[0011] Furthermore, a connecting plate mechanism is provided on the clamping plate; a guide groove is provided on the clamping plate, and the connecting plate mechanism includes a connecting plate and a screw connected by threads, the connecting plate and the guide groove are slidably matched, and the two ends of the screw are respectively rotatably connected to the mounting plate and the cross beam installed on the clamping plate, and a connecting plate servo motor driving the connecting screw is provided on the mounting plate;

[0012] The connecting plate is provided with a sliding driving force through a connecting plate servo motor, including a material connecting state of extending out of the guide groove and a non-material connecting state of returning to the guide groove. The welding steel plate is clamped by the clamping plate and is flipped from the front plate surface to the back plate surface state by a flipping driving force provided by a flipping servo motor. The connecting plate is converted from a non-material connecting state to a material connecting state, so as to support the welding steel plate through the connecting plate extending out of the guide groove.

[0013] Furthermore, when the clamping plate clamps the welding steel plate, there is a distance L between the connecting plate and the welding steel plate.

[0014] Furthermore, an anti-drop cover is threadedly screwed onto the end of the square shaft body portion of the rotating shaft.

[0015] Beneficial effect: The front image acquisition unit of the present invention is responsible for acquiring images of the front surface of the welded steel plate. After the front image acquisition is completed, when the welded steel plate is conveyed to the position of the steel plate flipping device, the left steel plate flipping arm and the right steel plate flipping arm cooperate to realize the back surface of the welded steel plate, so that the back surface of the welded steel plate faces upward, and then the rear image acquisition unit acquires images of the back surface of the welded steel plate. By analyzing the images acquired from the front and back surfaces, the surface rust, surface dirt, welding marks after welding, whether there are cracks at the welding joint, and whether the welded steel plate is burned through can be obtained, thereby judging whether the welded steel plate is qualified. The detection has a high degree of automation, and the detection covers the front and back surfaces of the welded steel plate at the same time, which effectively ensures the comprehensiveness and accuracy of the detection, and improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the location of the rear image acquisition unit and the light source device;

[0018] Figure 3 This is a structural schematic diagram of the location of the right steel plate flipping arm;

[0019] Figure 4 for Figure 3 A schematic diagram of the structure enlargement of the A region in the middle;

[0020] Figure 5 It is a structural schematic diagram of the welded steel plate being clamped and lifted;

[0021] Figure 6 It is a structural schematic diagram of the welding steel plate when it is flipped from the front surface to the back surface and lowered. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] like Figure 1 , Figure 5 as well as Figure 6 As shown, a welding steel plate surface quality detection system comprises a machine platform 1 which passes horizontally through a steel plate conveying device 2, wherein an image acquisition device 3 located above the steel plate conveying device 2 is arranged on the top of the machine platform 1, and a steel plate turning device 4 located on the side of the steel plate conveying device 2 is arranged on the lower part of the machine platform 1; the image acquisition device 3 comprises a front image acquisition part 3.1 and a rear image acquisition part 3.2 along the conveying direction of the welding steel plate 5 conveyed by the steel plate conveying device 2, wherein the front image acquisition part 3.1 and the rear image acquisition part 3.2 respectively correspond to the image acquisition of the welding steel plate 5 The front and back surface images of the steel plate are connected, and a light source device 6 is arranged between the front image acquisition part 3.1 and the rear image acquisition part 3.2; the steel plate turning device 4 includes a left steel plate turning arm 4.1 and a right steel plate turning arm 4.2 arranged on both sides of the steel plate conveying device 2. When the steel plate conveying device 2 conveys the welding steel plate 5 to the position between the front image acquisition part 3.1 and the rear image acquisition part 3.2, the left steel plate turning arm 4.1 and the right steel plate turning arm 4.2 convert the front and back surfaces of the welding steel plate 5 through synchronous clamping, lifting and flipping actions. The front image acquisition unit 3.1 of the present invention is responsible for acquiring images of the front surface of the welded steel plate 5. After the front image acquisition is completed, when the welded steel plate 5 is transported to the position of the steel plate flipping device 4, the left steel plate flipping arm 4.1 and the right steel plate flipping arm 4.2 cooperate to realize the back surface of the welded steel plate 5, so that the back surface of the welded steel plate 5 faces upward, and then the rear image acquisition unit 3.2 acquires images of the back surface of the welded steel plate 5. By analyzing the images acquired from the front and back surfaces, the surface rust, surface dirt, welding marks after welding, whether there are cracks in the welding joint, and whether the welded steel plate is burned through are obtained, thereby judging whether the welded steel plate is qualified. The detection has a high degree of automation, and the detection covers the front and back surfaces of the welded steel plate at the same time, effectively ensuring the comprehensiveness and accuracy of the detection, and improving the detection efficiency.

[0024] like Figure 2 As shown, the front image acquisition unit 3.1 has the same structure as the rear image acquisition unit 3.2; the front image acquisition unit 3.1 or the rear image acquisition unit 3.2 includes a mounting seat 31, a camera motion adjustment mechanism 32 and an industrial camera 33, and the industrial camera 33 is arranged on the machine platform 1 through the camera motion adjustment mechanism 32 and the mounting seat 31, and the camera motion adjustment mechanism 32 can drive the industrial camera 33 to move up and down to adjust the object distance between the industrial camera 33 and the welded steel plate 5 on the steel plate conveying device 2, so that the imaging is clearer, and the obtained image can be more conducive to finding the defects on the surface of the welded steel plate 5. The industrial camera 33 is used to replace the human eye to perform real-time detection and monitoring management on the output welded steel plate 5, and defective welded steel plates can be screened out in time. The camera motion adjustment mechanism 32 can adopt a mechanical arm, a lifting drive device or a servo motor screw drive mechanism.

[0025] The first type of welded steel plate surface quality defect is severe rust, which mainly detects 50% or more of the total area of ​​the welded steel plate surface rust. If the rusty steel plate is used for welding during the welding process, if the rust on the surface of the welded steel plate is serious, it will have a certain impact on the welding result. For example, the rust part will make the weld more prone to pores during welding, which will affect the bonding between the two welded plates during the welding process, and will also produce slag inclusions, which will eventually lead to poor fusion of the welded plates.

[0026] The second type of surface quality defect of welded steel plates is the presence of dirt such as oil. The main detection of oil defects is the location of oil on the surface of welded steel plates. The detection range is that the area of ​​oil is not less than 6% of the entire steel plate. If the welded steel plate has dirt defects such as oil, welding will cause pores in the weld seam, and it is very likely to cause false welding, which will greatly reduce the strength of the welded structure and shorten the service life. If this phenomenon occurs in an important structure, it will cause an accident with very serious consequences. This is very demanding for welding products with high welding sealing properties.

[0027] Finding the location of the weld mark is conducive to a clearer understanding of the situation of the weld mark welding interface, and is also conducive to targeted analysis and detection of defect targets. After finding the location of the weld mark of the welded steel plate, the characteristic screening of the position defects of the weld mark is carried out. The first type of weld mark defect is weld mark crack. In real industrial engineering, if welding cracks appear during welding, it will cause great harm to production operations. Not only that, it will also cause major on-site accidents, because welding cracks are one of the most dangerous deficiencies in welding projects; the second type of weld mark defect is welding burn-through. When welding steel plates have welding burn-through, it is basically the burn-through of the welding base material during welding, which will obviously cause some irreparable damage to the welded steel plates.

[0028] like Figure 2 As shown, the light source device 6 includes a strip light source 64, a swing shaft 63, a swing driving unit 62 and a base 61; the swing driving unit 62 is installed on the machine 1 through the base 61, and the swing driving unit 62 can select a swing servo motor, and the strip light source 64 is connected to the swing driving unit 62 through the swing shaft 63; the swing driving unit 62 drives the swing shaft 63 to drive the strip light source 64 to swing forward and backward in the conveying direction of the steel plate conveying device 2, so as to adjust the lighting direction corresponding to the front image acquisition unit 3.1 and the rear image acquisition unit 3.2 respectively, so as to realize lighting of two positions by a strip light source 64 under the action of swinging motion. Considering the surface reflectivity of the welded steel plate 5, the selected strip light source 64 can make the captured image more clearly reflect the weld position on the welded steel plate and the surrounding effect, and the strip light source is compact in size and more flexible and convenient to use, and can be applied to different positions and occasions.

[0029] like Figure 1 and Figure 3 As shown, the left steel plate flipping arm 4.1 and the right steel plate flipping arm 4.2 have the same structure; the left steel plate flipping arm 4.1 or the right steel plate flipping arm 4.2 comprises a lifting mechanism 41 and a clamping and flipping composite mechanism 42, and the clamping and flipping composite mechanism 42 is installed on the machine platform 1 through the lifting mechanism 41; Figure 5 As shown, when the two clamping and flipping composite mechanisms 42 of the left steel plate flipping arm 4.1 and the right steel plate flipping arm 4.2 cooperate to clamp the welded steel plate 5, the lifting mechanism 41 drives the clamping and flipping composite mechanism 42 to rise to make the welded steel plate 5 separate from the steel plate conveying device 2, and the clamping and flipping composite mechanism 42 drives the welded steel plate 5 to flip; Figure 6 As shown, the lifting mechanism 41 drives the clamping and flipping compound mechanism 42 to descend to make the welded steel plate 5 close to the steel plate conveying device 2, and the two clamping and flipping compound mechanisms 42 of the left steel plate flipping arm 4.1 and the right steel plate flipping arm 4.2 cooperate to release the welded steel plate 5, so that the welded steel plate 5 falls onto the steel plate conveying device 2. The lifting mechanism 41 of the steel plate flipping arm cooperates with the clamping and flipping compound mechanism 42 in the clamping, lifting and flipping movements. Under the premise of clamping the welded steel plate 5, the lifting purpose is to adjust the position of the welded steel plate 5, that is, to disengage or put it aside relative to the steel plate conveying device 2. The disengagement is to reserve enough flipping space, and the putting is to continue to transport the welded steel plate 5. The clamping and flipping compound mechanism 42 can integrate the dual functions of clamping and flipping, and can cooperate with the lifting mechanism 41 to complete the normal flipping operation of the welded steel plate 5, thereby ensuring the full coverage quality inspection of the front and back surfaces of the welded steel plate 5 and improving the inspection efficiency.

[0030] More specifically, Figure 3 As shown, the lifting mechanism 41 includes a lifting beam 412 installed on the machine platform 1 through a vertical linear servo slide module 411 for lifting and moving; the clamping and flipping composite mechanism 42 includes a turntable 422 installed on the lifting beam 412 through a rotating shaft 421, a clamping plate 426 fixedly connected to the turntable 422 through a connecting rod 425, and a transverse cylinder 424 installed on the lifting beam 412; the power input end of the rotating shaft 421 is connected to a flip servo motor 423; the rotating shaft 421 includes an integrally formed cylindrical shaft body and a square shaft body, the cylindrical shaft body is connected to the lifting beam 412 for rotation, and the square shaft body is connected to the turntable 422 for axial sliding; the outer ring of the turntable 422 is circumferentially grooved to form an annular groove 4220, and an axial limit head 428 is provided on the telescopic rod 4240 of the transverse cylinder 424, as shown in FIG. Figure 4As shown, the axial limit head 428 is fixedly installed by the mounting seat 429 in cooperation with the positioning screw 420, and the axial limit head 428 radially extends into the annular groove 4220, so that the axial limit head 428 and the rotating disk 422 are axially limited and circumferentially slidingly connected. The flexible connection between the rotating disk 422 and the rotating shaft 421 of the clamping and flipping composite mechanism 42 and the flexible connection between the rotating disk 422 and the telescopic rod 4240 can achieve the clamping movement and flipping movement of the relative welding steel plate 5 without interfering with each other, and the structures can also cooperate with each other to realize the dual functions of clamping and flipping, occupying little space and saving investment costs.

[0031] In order to temporarily connect the welded steel plate 5 when the clamping plate 426 is loosened after turning over, so as to prevent the welded steel plate 5 from falling on the steel plate conveying device 2 due to the gradual reduction of the clamping force, the present invention is as follows: Figure 3 As shown, the clamping plate 426 is provided with a connecting plate mechanism 43; the clamping plate 426 is provided with a guide groove 427, and the connecting plate mechanism 43 includes a connecting plate 431 and a screw rod 432 connected by threads, the connecting plate 431 and the guide groove 427 are slidably matched, and the two ends of the screw rod 432 are respectively rotatably connected to the mounting plate 434 and the cross beam 435 mounted on the clamping plate 426, and the mounting plate 434 is provided with a connecting plate servo motor 433 that drives the connecting screw rod 432; Figure 5 and Figure 6 As shown, the connecting plate 431 provides a sliding driving force through the connecting plate servo motor 433, including a receiving state of extending out of the guide groove 427 and a non-receiving state of returning to the guide groove 427. The welding steel plate 5 is clamped by the clamping plate 426 and is flipped from the positive plate surface to the reverse plate surface state by the flipping servo motor 423. The connecting plate 431 is converted from the non-receiving state to the receiving state, so as to support the welding steel plate 5 through the connecting plate 431 extending out of the guide groove 427, thereby realizing temporary support for the welding steel plate 5 after the flipping. At this time, the clamping force completely disappears, and the welding steel plate 5 is only supported by the connecting plate 431. Based on the descending action of the lifting mechanism 41, at this time, the height of the welding steel plate 5 from the steel plate conveying device 2 is relatively low. When the two connecting plates 431 are returned to the guide groove 427 at the same time, the welding steel plate 5 loses support and falls on the steel plate conveying device 2. The posture will not be skewed, which is more conducive to the subsequent detection of its reverse plate surface.

[0032] It is worth noting that, since the plate surface of the welding steel plate 5 may be rusted, dirty, etc., when the connecting plate 431 is too close to the plate surface of the welding steel plate 5, the rust and dirt on the protruding plate surface will hinder the extension of the connecting plate 431, resulting in the connecting plate 431 being unable to extend normally and causing the material connection failure. Therefore, in the present invention, if Figure 2 As shown, when the clamping plate 426 clamps the welding steel plate 5, there is a spacing L between the connecting plate 431 and the welding steel plate 5, and sufficient distance is reserved to ensure the normal realization of the material connection function.

[0033] In order to prevent the turntable 422 from accidentally coming off the axis, Figure 3 As shown, an anti-drop cover 450 is screwed onto the end of the square shaft portion of the rotating shaft 421 .

[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A welding steel plate surface quality detection system, characterized in that: The invention comprises a machine platform (1) passing horizontally through a steel plate conveying device (2); an image acquisition device (3) located above the steel plate conveying device (2) is arranged on the top of the machine platform (1); a steel plate flipping device (4) located on the side of the steel plate conveying device (2) is arranged on the bottom of the machine platform (1); the image acquisition device (3) comprises a front image acquisition part (3.1) and a rear image acquisition part (3.2) along the conveying direction of the welded steel plate (5) conveyed by the steel plate conveying device (2); the front image acquisition part (3.1) and the rear image acquisition part (3.2) respectively capture the front and back images of the welded steel plate The steel plate flipping device (4) comprises a left steel plate flipping arm (4.1) and a right steel plate flipping arm (4.2) arranged on both sides of the steel plate conveying device (2); when the steel plate conveying device (2) conveys the welding steel plate (5) to a position between the front image acquisition part (3.1) and the rear image acquisition part (3.2), the left steel plate flipping arm (4.1) and the right steel plate flipping arm (4.2) convert the front and back surfaces of the welding steel plate (5) through synchronous clamping, lifting and flipping actions.

2. A welding steel plate surface quality detection system according to claim 1, characterized in that: The front image acquisition unit (3.1) and the rear image acquisition unit (3.2) have the same structure; the front image acquisition unit (3.1) or the rear image acquisition unit (3.2) comprises a mounting seat (31), a camera motion adjustment mechanism (32) and an industrial camera (33); the industrial camera (33) is arranged on the machine platform (1) via the camera motion adjustment mechanism (32) and the mounting seat (31); and the camera motion adjustment mechanism (32) can drive the industrial camera (33) to move up and down to adjust the object distance between the industrial camera (33) and the welding steel plate (5) on the steel plate conveying device (2).

3. A welding steel plate surface quality detection system according to claim 2, characterized in that: The light source device (6) comprises a strip light source (64), a swing shaft (63), a swing driving unit (62) and a base (61); the swing driving unit (62) is mounted on the machine platform (1) via the base (61), and the strip light source (64) is connected to the swing driving unit (62) via the swing shaft (63); the swing driving unit (62) drives the swing shaft (63) to drive the strip light source (64) to swing forward and backward in the conveying direction of the steel plate conveying device (2), so as to adjust the lighting direction corresponding to the front image acquisition unit (3.1) and the rear image acquisition unit (3.2) respectively.

4. A welding steel plate surface quality detection system according to claim 3, characterized in that: The left steel plate flipping arm (4.1) and the right steel plate flipping arm (4.2) have the same structure; the left steel plate flipping arm (4.1) or the right steel plate flipping arm (4.2) comprises a lifting mechanism (41) and a clamping and flipping composite mechanism (42); the clamping and flipping composite mechanism (42) is installed on the machine platform (1) via the lifting mechanism (41); When the two clamping and flipping composite mechanisms (42) of the left steel plate flipping arm (4.1) and the right steel plate flipping arm (4.2) cooperate to clamp the welded steel plate (5), the lifting mechanism (41) drives the clamping and flipping composite mechanism (42) to rise until the welded steel plate (5) is separated from the steel plate conveying device (2), and the clamping and flipping composite mechanism (42) drives the welded steel plate (5) to flip; The lifting mechanism (41) drives the clamping and flipping composite mechanism (42) to descend to a state where the welding steel plate (5) is close to the steel plate conveying device (2), and the two clamping and flipping composite mechanisms (42) of the left steel plate flipping arm (4.1) and the right steel plate flipping arm (4.2) cooperate to release the welding steel plate (5), so that the welding steel plate (5) falls onto the steel plate conveying device (2).

5. A welding steel plate surface quality detection system according to claim 4, characterized in that: The lifting mechanism (41) comprises a lifting beam (412) installed on the machine platform (1) through a vertical linear servo slide module (411) for lifting and moving; the clamping and flipping composite mechanism (42) comprises a turntable (422) installed on the lifting beam (412) through a rotating shaft (421), a clamping plate (426) fixedly connected to the turntable (422) through a connecting rod (425), and a transverse cylinder (424) installed on the lifting beam (412); the power input end of the rotating shaft (421) is connected to a flipping servo motor (423); the rotating shaft (421) 421) comprises an integrally formed cylindrical shaft body and a square shaft body, the cylindrical shaft body is rotationally connected to the lifting beam (412), and the square shaft body is axially slidingly connected to the turntable (422); the outer ring of the turntable (422) is circumferentially grooved to form an annular groove (4220), and an axial limit head (428) is provided on the telescopic rod (4240) of the transverse cylinder (424), and the axial limit head (428) radially extends into the annular groove (4220), so that the axial limit head (428) and the turntable (422) are axially limited and circumferentially slidingly connected.

6. A welding steel plate surface quality detection system according to claim 5, characterized in that: The clamping plate (426) is provided with a connecting plate mechanism (43); the clamping plate (426) is provided with a guide groove (427), the connecting plate mechanism (43) comprises a connecting plate (431) and a screw rod (432) connected by threads, the connecting plate (431) and the guide groove (427) are slidably matched, the two ends of the screw rod (432) are respectively rotatably connected to a mounting plate (434) and a cross beam (435) mounted on the clamping plate (426), and a connecting plate servo motor (433) for driving the connecting screw rod (432) is provided on the mounting plate (434); The connecting plate (431) provides a sliding driving force through a connecting plate servo motor (433), including a material-connecting state of extending out of the guide groove (427) and a non-material-connecting state of returning to the guide groove (427). The welding steel plate (5) is clamped by the clamping plate (426) and is flipped from the front plate surface to the back plate surface state by a flipping driving force provided by a flipping servo motor (423). The connecting plate (431) is converted from the non-material-connecting state to the material-connecting state, so as to support the welding steel plate (5) through the connecting plate (431) extending out of the guide groove (427).

7. A welding steel plate surface quality detection system according to claim 6, characterized in that: When the clamping plate (426) is in a state of clamping the welding steel plate (5), a distance L is provided between the connecting plate (431) and the welding steel plate (5).

8. A welding steel plate surface quality detection system according to claim 5 or 6, characterized in that: An anti-drop cover (450) is screwed onto the end of the square shaft portion of the rotating shaft (421).

Images