Laser welding AOI detection equipment

Abstract

The invention belongs to the technical field of visual inspection, and particularly relates to laser welding AOI (automatic optical inspection) equipment which comprises a laser welding head, a mounting frame, an XYZ three-axis moving mechanism, a blowing mechanism, a first visual inspection mechanism and a second visual inspection mechanism. The blowing mechanism is arranged on the mounting frame through a first adjustable cantilever; the second visual inspection mechanism is vertically fixed at the bottom of the mounting frame and is positioned on the rear side of the laser beam; the first visual inspection mechanism is arranged on the mounting frame through a fixed cantilever; the first visual detection mechanism and the blowing mechanism are located on left and right sides of the laser beam; the air blowing mechanism is provided with a long-strip-shaped air outlet and is arranged in the front-back direction. In the machining process, through cooperation of the air blowing mechanism, the first visual detection mechanism and the second visual detection mechanism, the accuracy of the detection effect can be guaranteed, and the adverse effect of welding dust fog on the detection effect can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of visual inspection technology, and in particular to laser welding AOI inspection equipment. Background Art

[0002] In the field of visual inspection, the inspection parameters for laser welding process mainly include the following aspects: Weld flatness: The weld should be even and flat, without obvious unevenness. When observed with the naked eye, the undulation of the weld surface should be within the specified tolerance range, generally not exceeding ±0.1mm.

[0003] ‌Weld width consistency‌: The width of the weld should remain relatively consistent throughout the weld length. Use a measuring tool (such as a caliper, micrometer, etc.) to measure the width of the weld at different locations. The width deviation should generally not exceed ±10% of the average width‌.

[0004] No welding defects: There should be no cracks, pores, slag inclusions, incomplete fusion and other defects on the weld surface. It can be checked by naked eye observation, magnifying glass or non-destructive testing methods (such as radiographic testing, ultrasonic testing, magnetic testing, etc.).

[0005] ‌ Penetration depth and weld width detection‌: According to the welding process requirements, metallographic analysis, sectioning and other methods are used to detect the penetration depth and weld width of the weld. For example, the penetration depth should reach a certain proportion of the material thickness (such as more than 50%), and the weld width should also be within the design requirements. ‌ However, in the daily processing, the welding dust and mist in the air around the welding point will affect the detection of the above parameters. Therefore, it is necessary to design a device that can reduce the impact of laser welding dust and mist to meet production needs. Summary of the invention

[0006] The object of the present invention is to provide a laser welding AOI inspection device to solve the problems raised in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a laser welding AOI inspection equipment, comprising a laser welding head that outputs a laser beam vertically downward, a mounting frame for mounting the laser welding head, an XYZ three-axis moving mechanism for driving the mounting frame to move, a blower mechanism for blowing air toward the welding point, and a first visual inspection mechanism for inspecting the welding point before welding, and a second visual inspection mechanism for inspecting the welding point after welding; the blower mechanism is arranged on the mounting frame through a first adjustable cantilever; the second visual inspection mechanism is vertically fixed to the bottom of the mounting frame and is located on the rear side of the laser beam; the first visual inspection mechanism is arranged on the mounting frame through a fixed cantilever; the first visual inspection mechanism and the blower mechanism are located on the left and right sides of the laser beam; the blower mechanism has a long strip-shaped air outlet and is arranged along the front-to-back direction.

[0008] The laser welding AOI inspection equipment described in the present invention, wherein the laser welding head includes a welding head body that emits light horizontally, and a conversion head that converts the angle of the light beam of the welding head body and points it vertically downward; the second visual inspection mechanism is located below the front end of the welding head body.

[0009] The laser welding AOI inspection equipment described in the present invention, wherein the conversion head includes a base, and a conversion chamber is provided on the lower side wall of the base; the conversion head also includes a reflective lens and an output lens arranged in the conversion chamber, and two deflection motors that respectively drive the reflective lens and the output lens to deflect; the reflective lens is vertically arranged, and the output lens is horizontally arranged.

[0010] The laser welding AOI inspection equipment described in the present invention is characterized in that an air collecting mechanism is provided on the mounting frame at a side of the laser beam away from the air blowing mechanism, the air collecting mechanism is connected to the mounting frame through an adjustable cantilever, and the air collecting mechanism has a long strip-shaped air inlet and is parallel to the air outlet on the left and right; when assembled in place, the horizontal straight-line distance between the air inlet and the laser beam is less than half of the horizontal straight-line distance between the air outlet and the laser beam.

[0011] The laser welding AOI inspection equipment described in the present invention, wherein the air blowing mechanism and the air collecting mechanism both include an air hood with a triangular cross-section, an air collecting cylinder connected to the smaller end of the air hood, and a connecting air pipe vertically fixed in the middle of the air collecting cylinder; the larger ends of the two air hoods respectively form the air inlet and the air outlet; the air inlet is horizontally arranged, and the air outlet is inclined downward; an air flow diffuser plate is provided in the air hood; when assembled in place, the connecting air pipe and the laser beam are both located in a vertical plane arranged along the left-right direction.

[0012] The laser welding AOI detection equipment of the present invention is characterized in that the upper end of the wind hood is longitudinally rotatable and provided with an infrared sensor facing the welding point.

[0013] The laser welding AOI inspection equipment described in the present invention, wherein the first adjustable cantilever and the adjustable cantilever both include a fixing seat for fixing the communicating air pipe, and a fixing arm longitudinally rotatably connected to the fixing seat; the rotating shaft of the fixing seat is arranged along the front-to-back direction, and the communicating air pipe is detachably connected to the fixing seat.

[0014] The laser welding AOI inspection equipment described in the present invention, wherein the XYZ three-axis moving mechanism includes a Z-axis lifting module for adjusting the up and down position of the laser welding head, an X-axis lateral movement module for driving the left and right position of the Z-axis lifting module, and a Y-axis lateral movement module for driving the X-axis lateral movement module to move forward and backward.

[0015] The laser welding AOI inspection equipment described in the present invention, wherein the Y-axis lateral movement module and the X-axis lateral movement module both include a screw motor module and a slide rail; the Z-axis lifting module is slidably arranged on the slide rail of the X-axis lateral movement module; the left and right sides of the Z-axis lifting module are vertically provided with a receiving frame extending downward, the receiving frame is located above the slide rail of the X-axis lateral movement module, and the lower end of the receiving frame is provided with a guide wheel that rolls in contact with the upper surface of the slide rail of the X-axis lateral movement module.

[0016] The laser welding AOI inspection equipment of the present invention, wherein a feeding mechanism for horizontally conveying workpieces in the left and right directions is provided below the X-axis lateral movement module, the feeding mechanism comprising two feeding brackets which are parallel and opposite to each other, a feeding belt which is longitudinally rotated and arranged on the top of the feeding bracket, and a belt driving motor which drives the feeding belt to rotate Compared with the prior art, the present invention has the following beneficial effects: during the processing, a horizontal wind beam in a surface shape is blown toward the welding point through the air outlet of the blower mechanism, so that the first visual inspection mechanism and the second visual inspection mechanism can obtain clearer images during inspection, thereby ensuring the accuracy of the inspection effect and greatly reducing the adverse effects of welding dust and fog on the inspection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a bird's-eye view of the overall structure of the present invention.

[0019] Figure 2 for Figure 1 An enlarged view of the location of the first visual detection mechanism.

[0020] Figure 3 for Figure 1 Enlarged view of the middle support frame.

[0021] Figure 4 for Figure 1 Bottom view of .

[0022] Figure 5 for Figure 4 Enlarged view of the center belt drive motor location.

[0023] Figure 6 It is the overall structural diagram of the Z-axis lifting module of the present invention.

[0024] Figure 7 It is the internal structure diagram of the conversion head of the present invention.

[0025] Figure 8 It is a side view of the present invention.

[0026] Fig. 9 for Figure 8 AA section view.

[0027] Fig.10 for Fig. 9 A magnified view of the local structure.

[0028] Fig.11 It is a three-dimensional diagram of the gas collecting mechanism of the present invention. DETAILED DESCRIPTION

[0029] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0032] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be described clearly and completely in combination with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are partial embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0034] This embodiment discloses Figures 1 to 11 The laser welding AOI inspection equipment shown in the figure (the full English name of AOI is: Automated Optical Inspection, i.e. automatic optical inspection) includes a laser welding head 10 that outputs a laser beam vertically downward, a mounting frame 20 for mounting the laser welding head 10, an XYZ three-axis moving mechanism 30 for driving the mounting frame 20 to move, a blower mechanism 40 for blowing air toward the welding point, and a first visual inspection mechanism 50 for inspecting the welding point before welding, and a second visual inspection mechanism 60 for inspecting the welding point after welding; wherein the first visual inspection mechanism 50 and the second visual inspection mechanism 60 are both high-precision cameras; the blower mechanism 40 is arranged on the mounting frame 20 through a first adjustable cantilever 190; the second visual inspection mechanism 60 vertically It is fixed at the bottom of the mounting frame 20 and is located at the rear side of the laser beam; the first visual inspection mechanism 50 is arranged on the mounting frame 20 through a fixed cantilever 70; the first visual inspection mechanism 50 and the air blowing mechanism 40 are located on the left and right sides of the laser beam, and the first visual inspection mechanism 50 is arranged obliquely and directly opposite the welding point; the air blowing mechanism 40 has a long strip-shaped air outlet 41 and is arranged along the front-to-back direction; during the processing, a horizontal air beam in a surface shape is blown toward the welding point through the air outlet of the air blowing mechanism 40, so that the first visual inspection mechanism 50 and the second visual inspection mechanism 60 can obtain clearer images during inspection, which can ensure the accuracy of the inspection effect and greatly reduce the adverse effects of welding dust and fog on the inspection effect.

[0035] Furthermore, an annular light source 80 is provided below the second visual inspection mechanism 60, a mounting plate 90 is provided on the upper side of the annular light source 80, a light hole 100 is provided on the mounting plate 90 corresponding to the cavity of the annular light source 80, a first polarizer 110 inclined at 45 degrees and a protective box 120 wrapped around the outer side of the filter are provided on the upper side of the mounting plate 90, windows 121 are provided at the top and bottom of the protective box 120, and a second polarizer 130 is provided in the top window 121, and a through hole 131 is provided in the center of the second polarizer 130 for the first visual inspection mechanism 5 0 shooting, during the processing, the second polarizer 130 of different apertures can be replaced according to different shooting requirements. Furthermore, a light-emitting unit 140 that emits light toward the lower side wall of the first polarizer 110 is provided on one side of the first polarizer 110 inside the protective box 120, and is used to reflect the light vertically downward through the lower side wall of the first polarizer 110 to the workpiece. Through the cooperation of the first polarizer 110, the second polarizer 130 and the light-emitting unit 140, the quality of the image obtained by the second visual inspection mechanism 60 can be guaranteed, and the interference of diffuse interference light can be reduced.

[0036] In this embodiment, the laser welding head 10 includes a welding head body 101 that emits light horizontally, and a conversion head 102 that converts the light beam of the welding head body 101 and points it vertically downward; the second visual detection mechanism 60 is located below the front end of the welding head body 101 and in front of the surface wind beam, so that when the welding head body 101 moves forward, the surface wind beam can clear the dust and mist in front of the welding point in advance to avoid interference.

[0037] In this embodiment, the conversion head 102 includes a base 1021, and a conversion chamber 10a is recessed on the lower side wall of the base 1021; the conversion head 102 also includes a reflective lens 1022 and an output lens 1023 arranged in the conversion chamber 10a, and two deflection motors 1024 for driving the reflective lens 1022 and the output lens to deflect respectively; the reflective lens 1022 is vertically arranged, and the output lens is horizontally arranged. By electrically connecting the two deflection motors 1024 to the control host, the deflection angle of the laser beam can be adjusted.

[0038] In the present embodiment, an air collecting mechanism 150 is provided on the mounting frame 20 on the side where the laser beam is away from the air blowing mechanism 40. The air collecting mechanism 150 is connected to the mounting frame 20 via a second adjustable cantilever 160. The air collecting mechanism 150 has a long air inlet 1501 and is parallel to the air outlet 41. When assembled in place, the horizontal straight-line distance between the air inlet 1501 and the laser beam is less than half of the horizontal straight-line distance between the air outlet 41 and the laser beam, so that the welding point is closer to the air inlet 1501. The surface wind beam blown out through the air outlet 41 forms a Bernoulli effect, which can further ensure that the dust and mist around the welding point can quickly enter the air inlet 1501.

[0039] In the present embodiment, the air blowing mechanism 40 and the air collecting mechanism 150 both include an air hood a1 with a triangular cross-section, an air collecting cylinder a2 connected to the smaller end of the air hood a1, and a connecting air pipe a3 vertically fixed in the middle of the air collecting cylinder a2; wherein the connecting air pipe a3 of the air blowing mechanism 40 is connected to an external positive pressure source device, and the connecting air pipe a3 of the air collecting mechanism 150 is connected to an external negative pressure source device; specifically, the air hood a1 is in the shape of an elongated strip, and the air collecting cylinder a2 and the air hood a1 are both arranged in the front-to-back direction; the larger ends of the two air hoods a1 respectively form an air inlet 1501 and an air outlet 41; the air inlet 1501 is arranged horizontally, and the air outlet The air vent 41 is tilted downward so that the blown air beam passes through the surface of the workpiece and enters the air inlet 1501; further, an air diffuser plate 170 is provided in the wind hood a1, and a plurality of air holes 171 are evenly arranged on the air diffuser plate 170, which are used to evenly diffuse the air in the air collecting cylinder a2 into the entire wind hood a1; when assembled in place, the connecting air pipe and the laser light beam are both located in a vertical plane arranged along the left and right directions to ensure that the position of the welding point is located on the left and right center lines of the surface-shaped air beam flowing out through the air diffuser plate 170, to ensure that the dust and mist before and after the welding point can be quickly blown into the air inlet 1501 during welding.

[0040] In this embodiment, the upper end of the wind hood a1 is longitudinally rotated and provided with an infrared sensor 180 facing the welding point, which is used to detect whether dust and fog gather near the welding point. When the degree of dust and fog accumulation reaches a certain level, the infrared sensor 180 can be used to feed back the situation to the control host in real time, so that the background system can make adjustments immediately, realize closed-loop control, and ensure the stability and anti-interference of the system.

[0041] In this embodiment, the first adjustable cantilever 190 and the second adjustable cantilever 160 both include a fixed seat b1 for fixing the communicating air pipe a3, and a fixed arm b2 connected to the fixed seat b1 for longitudinal damping rotation; the rotating shaft of the fixed seat b1 is arranged along the front-to-back direction, and the communicating air pipe a3 is detachably connected to the fixed seat b1; specifically, the rotating shaft of the fixed seat b1 can be replaced by a bolt, so that while adjusting the inclination angle of the fixed arm b2, it can also be used to lock the fixed arm b2 and maintain the adjusted angle, achieving multiple goals at one stroke; in the actual processing process, the angle of the outlet of the wind hood a1 can be adjusted by the fixed arm b2 with an adjustable angle, which makes it convenient for the operator to make adjustments according to the shape and structure of the welding point of the workpiece, so as to ensure that high-quality recognition images can be obtained for different workpieces, greatly improving the accuracy and adaptability of system recognition.

[0042] In this embodiment, the XYZ three-axis moving mechanism 30 includes a Z-axis lifting module 301 for adjusting the up and down position of the laser welding head 10, an X-axis lateral movement module 302 for driving the left and right position of the Z-axis lifting module 301, and a Y-axis lateral movement module 303 for driving the X-axis lateral movement module 302 to move forward and backward; wherein, the Y-axis lateral movement module 303 and the X-axis lateral movement module 302 both include a screw motor module c1 and a slide rail c2, and of course, the screw motor module c1 can also be replaced by a linear motor or a cylinder; the Z-axis lifting module 301 is slidably arranged on the slide rail c2 of the X-axis lateral movement module 302; the left and right sides of the Z-axis lifting module 301 are vertically provided with downwardly extending The supporting frame 200 is fixed on the mounting frame 20, and the supporting frame 200 is located above the slide rail c2 of the X-axis transverse module 302. The lower end of the supporting frame 200 is provided with a guide wheel 210 that rolls with the upper surface of the slide rail c2 of the X-axis transverse module 302, and the circumferential side wall of the guide wheel 210 is provided with an annular groove 211 that is adapted to the slide rail c2 of the X-axis transverse module 302. Through the cooperation of the supporting frame 200 and the guide wheel 210, it can not only further guide the mounting frame 20, but also assist in supporting the mounting frame 20 and limiting the downward adjustment position of the mounting frame 20, so as to avoid excessive downward adjustment of the mounting frame 20.

[0043] Among them, the Z-axis lifting module 301 includes a slide 3a slidably connected to the slide rail c2 of the X-axis lateral movement module 302, a movable seat 3b arranged on the upper surface of the slide 3a and sliding horizontally along the front and rear directions through the guide rail 220, and a lifting plate 3c arranged above the movable seat 3b; the slide 3a and the lifting plate 3c are longitudinally slidably connected by the guide shaft 230, and the mounting frame 20 is arranged on the upper surface of the lifting plate 3c. In order to ensure stability, the guide shaft 230 has multiple and is arranged around the edge of the lifting plate 3c; further, fixed plates 240 are vertically upwardly provided at the front and rear ends of the slide 3a, and the two fixed plates 240 are connected together by an adjusting screw 250 along the front and rear directions. The adjusting screw 25 The front and rear ends of 0 are respectively connected to the two fixed plates 240 for fixed-axis rotation, and the adjusting screw 250 passes through the movable seat 3b and is rotatably connected thereto; a lifting block 260 located above the movable seat 3b is also provided on the adjusting screw 250 between the two fixed plates 240, and the lower end of the lifting block 260 and the upper end of the movable seat 3b are respectively provided with two inclined surfaces 270 parallel to each other, and the upper and lower ends of the inclined surfaces are arranged along the front and rear, and the upper end of the lifting block 260 is fixed to the lower surface of the lifting plate 3c. When the adjusting screw 250 is rotated, the lifting block 260 can be pushed to slide up and down on the inclined surface 270 on the movable seat 3b, thereby realizing the up and down adjustment of the lifting plate 3c, and then realizing the up and down adjustment of the mounting frame 20.

[0044] In order to prevent the lifting block 260 from separating from the movable seat 3b to the left and right, a guide rib 3b1 is provided on the inclined surface 270 of the movable seat 3b along the front-to-back direction, and a guide groove 261 adapted to the guide rib 3b1 is provided on the inclined surface 270 of the lifting block 260. The guide groove 261 is also used to avoid the adjusting screw 250 when the lifting block is lowered to the lowest position, so that the overall structural height of the Z-axis lifting module is further reduced.

[0045] In addition, the Z-axis lifting module 301 can also be replaced by a vertically arranged cylinder or screw motor module c1.

[0046] In this embodiment, a feeding mechanism 280 for horizontally conveying workpieces in the left and right directions is provided below the X-axis transverse movement module 302. The feeding mechanism 280 includes two feeding brackets 281 that are parallel and opposite to each other in the front and rear directions, and a feeding belt 282 that is longitudinally rotatably arranged on the top of the feeding bracket 281, and a belt driving motor 283 that drives the feeding belt 282 to rotate. Batch workpiece processing can be achieved through the cooperation of the belt driving motor 283 and the feeding belt 282 to ensure processing efficiency.

[0047] The specific detection steps of this equipment are as follows: When the workpiece is moved to the right position, the welding point is identified and located by the first visual inspection mechanism 50 in advance and inspected synchronously, providing the background control system with information on whether the next step of processing can be carried out; When the first detection is completed, the air blowing mechanism and the air collecting mechanism 150 work synchronously to form a plane-shaped wind beam at the welding point in advance to clean up the dust and foreign matter around the welding point; Furthermore, the welding head body 101 is started and the welding point is welded by the laser beam. During the welding process, the air blowing mechanism and the air collecting mechanism 150 continue to work, and the infrared sensor 180 detects in real time whether there is high-temperature dust fog gathering around the welding point. If there is high-temperature dust fog, the background control system is triggered to increase the wind speed of the surface wind beam. When welding is completed, the surface air beam continues to work, and the second visual inspection mechanism 60 performs visual inspection on the welding point after welding, and uploads the obtained image information to the background control system for standard judgment.

[0048] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A laser welding AOI inspection equipment, characterized in that: It includes a laser welding head that outputs a laser beam vertically downward, a mounting frame for mounting the laser welding head, an XYZ three-axis moving mechanism for driving the mounting frame to move, a blower mechanism for blowing air toward the welding point, and a first visual inspection mechanism for inspecting the welding point before welding, and a second visual inspection mechanism for inspecting the welding point after welding; the blower mechanism is arranged on the mounting frame through a first adjustable cantilever; the second visual inspection mechanism is vertically fixed to the bottom of the mounting frame and is located on the rear side of the laser beam; the first visual inspection mechanism is arranged on the mounting frame through a fixed cantilever; the first visual inspection mechanism and the blower mechanism are located on the left and right sides of the laser beam; the blower mechanism has a long strip-shaped air outlet and is arranged along the front-to-back direction.

2. The laser welding AOI inspection equipment according to claim 1, characterized in that: The laser welding head comprises a welding head body for emitting light horizontally, and a conversion head for converting the light beam of the welding head body to point vertically downward; the second visual detection mechanism is located below the front end of the welding head body.

3. The laser welding AOI inspection equipment according to claim 2, characterized in that: The conversion head includes a base, and a conversion chamber is provided on the lower side wall of the base; the conversion head also includes a reflective lens and an output lens arranged in the conversion chamber, and two deflection motors that drive the reflective lens and the output lens to deflect respectively; the reflective lens is arranged vertically, and the output lens is arranged horizontally.

4. The laser welding AOI inspection equipment according to claim 1, characterized in that: An air collecting mechanism is provided on the mounting frame at a side of the laser beam facing away from the air blowing mechanism. The air collecting mechanism is connected to the mounting frame via a second adjustable cantilever. The air collecting mechanism has a long air inlet and is parallel to the air outlet on the left and right. When assembled in place, the horizontal straight-line distance between the air inlet and the laser beam is less than half of the horizontal straight-line distance between the air outlet and the laser beam.

5. The laser welding AOI inspection equipment according to claim 4, characterized in that: The blowing mechanism and the air collecting mechanism both include an air hood with a triangular cross-section, an air collecting cylinder connected to the smaller end of the air hood, and a connecting air pipe vertically fixed in the middle of the air collecting cylinder; the larger ends of the two air hoods respectively form the air inlet and the air outlet; the air inlet is horizontally arranged, and the air outlet is inclined downward; an air flow diffuser plate is provided in the air hood; when assembled in place, the connecting air pipe and the laser beam are both located in a vertical plane arranged along the left-right direction.

6. The laser welding AOI inspection equipment according to claim 5, characterized in that: The upper end of the wind shield is longitudinally rotated and provided with an infrared sensor facing the welding point.

7. The laser welding AOI inspection equipment according to claim 5, characterized in that: The first adjustable cantilever and the second adjustable cantilever both include a fixing seat for fixing the communicating air pipe, and a fixing arm connected to the fixing seat for longitudinal rotation; the rotating shaft of the fixing seat is arranged along the front-rear direction, and the communicating air pipe is detachably connected to the fixing seat.

8. The laser welding AOI inspection equipment according to claim 1, characterized in that: The XYZ three-axis moving mechanism includes a Z-axis lifting module for adjusting the up and down position of the laser welding head, an X-axis lateral movement module for driving the left and right position of the Z-axis lifting module, and a Y-axis lateral movement module for driving the X-axis lateral movement module to move forward and backward.

9. The laser welding AOI inspection equipment according to claim 8, characterized in that: The Y-axis lateral movement module and the X-axis lateral movement module both include a screw motor module and a slide rail; the Z-axis lifting module is slidably arranged on the slide rail of the X-axis lateral movement module; the left and right sides of the Z-axis lifting module are vertically provided with a receiving frame extending downward, the receiving frame is located above the slide rail of the X-axis lateral movement module, and the lower end of the receiving frame is provided with a guide wheel that rolls with the upper surface of the slide rail of the X-axis lateral movement module.

10. The laser welding AOI inspection equipment according to claim 8, characterized in that: A feeding mechanism for horizontally conveying workpieces in the left and right directions is provided below the X-axis transverse movement module. The feeding mechanism includes two feeding brackets that are parallel and opposite to each other in front and back, a feeding belt that is longitudinally rotated and arranged on the top of the feeding bracket, and a belt drive motor that drives the feeding belt to rotate.

Images