Laser welding device based on machine vision sorting

Abstract

The utility model discloses a laser welding device based on machine vision sorting, which comprises a machine body, a controller, a workpiece clamping mechanism, a laser welder, a detection camera and a laser moving mechanism, a welding station is arranged on the table top of the machine body, and a workpiece is clamped by the workpiece clamping mechanism and is horizontally and longitudinally positioned on the welding station. The laser welding device and the detection camera are arranged in the longitudinal direction and installed on the base, the laser welding device and the detection camera are located over a welding station, and the base is driven by the laser moving mechanism to adjust welding coordinates and focusing center coordinates. According to the welding device, the laser welding device and the detection camera are arranged on the laser moving mechanism in parallel, the detection procedure and the laser welding procedure are achieved by sharing a welding station, procedure switching is omitted, compact arrangement of the station is facilitated, the detection camera and the laser welding device are relatively static, focusing center coordinate adjustment is conducted with welding coordinates as base points, and focusing can be conducted rapidly and accurately; the laser welding device and the detection camera share one adjusting system, and the device is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of welding equipment, in particular to a laser welding device based on machine vision sorting. Background Art

[0002] In the processing of tubular or joint-type plastic or metal products, laser welding is a key process for achieving pipe-sleeve connections. Welding quality must be inspected and judged after completion. Quality control is required for every product in the welding process, and defective products must be promptly reworked or scrapped. Traditional manual visual inspection is limited by subjective experience, resulting in large quality control errors and the need for offline inspection, which reduces production and quality control efficiency.

[0003] With the continuous improvement of the degree of automation, automated welding and automated inspection have been widely promoted and applied in the processing field. Visual components are used to collect welds in the laser welding process for automatic image analysis to realize automated inspection. For example, the patent CN202023080411.6 online laser welding device has multiple stations set up through a turntable, and the inspection station is set behind the welding station. It can realize online inspection of weld quality after welding. However, since welding and inspection are located at two independent stations respectively, it not only takes up the turntable space for layout, increases the equipment structure size, and increases the sequence time, but also needs to set up two drive mechanisms to realize their respective adjustments. Therefore, whether in terms of production efficiency or equipment cost, the structure and process layout of the welding device in the prior art still need to be improved. Utility Model Content

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a laser welding device based on machine vision sorting to solve one or more problems raised in the above background technology.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A laser welding device based on machine vision sorting includes a machine body, a controller, a workpiece clamping mechanism, and a laser welder, a detection camera and a laser moving mechanism respectively connected to the controller. A welding station is set on the machine body table. The workpiece is clamped by the workpiece clamping mechanism and positioned horizontally and longitudinally on the welding station. The laser welder and the detection camera are arranged longitudinally and installed on a base. Both are located directly above the welding station. The base is driven by the laser moving mechanism to adjust the welding coordinates and the focus center coordinates.

[0007] Furthermore, it also includes a workstation turntable, which is electrically connected to the controller. The workstation turntable is provided with a loading station, a welding station, a marking station and a sorting station, which is used to rotate and automatically switch processes between the various workstations. Each workstation is provided with a workpiece clamping mechanism.

[0008] Furthermore, the workpiece clamping mechanism includes a driving mechanism, a clamping head and a positioning center. The clamping head and the positioning center are arranged relative to each other and are used to position the workpiece on the positioning center line constructed by the two. One end of the workpiece is inserted and clamped in the clamping head, and the other end is supported by the positioning center. The clamping head is driven to rotate by the driving mechanism, and the driving mechanism is electrically connected to the controller.

[0009] Furthermore, the laser moving mechanism includes a longitudinal drive mechanism and a vertical drive mechanism. The longitudinal drive mechanism is installed on the machine body table and is located next to the welding station. The vertical drive mechanism is arranged on the longitudinal drive mechanism. The base is fixed to the side of the drive end of the vertical drive mechanism. The welding head of the laser welder is aligned with the positioning center line directly below it.

[0010] Furthermore, a laser marking system is provided on the marking station, which includes a laser marker, a distance adjustment mechanism and a position adjustment mechanism. The laser marker is provided on the position adjustment mechanism for adjusting the lateral position of the laser marker. The position adjustment mechanism is supported by the distance adjustment mechanism for synchronously lifting and lowering the position adjustment mechanism and the laser marker.

[0011] Furthermore, a sorting mechanism is provided on the sorting station, and good product chutes and defective product chutes with different discharge directions are provided on the machine table. The sorting mechanism includes a sorting clamp, a lifting mechanism, a transverse conveying mechanism and a longitudinal conveying mechanism. The sorting clamp is installed on the lifting mechanism, and the longitudinal conveying mechanism is fixed on the machine table. The discharge ports of the good product chute and the defective product chute are located on the longitudinal sorting track of the longitudinal conveying mechanism. The longitudinal conveying mechanism supports and connects the transverse conveying mechanism, and the transverse conveying mechanism is connected to the lifting mechanism for moving and conveying between the sorting station and the longitudinal sorting track.

[0012] Compared with the existing technology, the laser welding device based on machine vision sorting in the present invention has the following beneficial effects:

[0013] This welding device simultaneously incorporates a laser welder and an inspection camera on a laser moving mechanism, allowing for online machine vision inspection of the weld seam after welding. The inspection and laser welding processes share a common welding station, eliminating the need for process switching between the two stations and facilitating a compact arrangement of stations within the processing area. Furthermore, because the inspection camera and laser welder are relatively stationary, relative adjustment of the focus center coordinates using the welding coordinates as a base point allows for rapid and accurate focusing. The laser welder and inspection camera share a common adjustment system, simplifying the device structure and reducing device cost.

[0014] The welding device integrates multiple working steps through a workstation turntable, automatically realizing one-stop welding, inspection and marking operations for tubular or joint products, with high efficiency in automated production and quality control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the laser welding device of the present utility model;

[0016] Figure 2 This is a three-dimensional diagram of the internal structure of the laser welding device of the present invention;

[0017] Figure 3 This is another three-dimensional diagram of the internal structure of the laser welding device of the present invention.

[0018] In the figure: 1. Machine body; 11. Upper box body; 12. Electric control box; 13. Display; 14. Controller; 2. Good product chute; 3. Bad product chute; 4. Laser moving mechanism; 41. Longitudinal drive mechanism; 42. Vertical drive mechanism; 5. Laser welder; 6. Laser marking system; 61. Laser marker; 62. Distance adjustment mechanism; 63. Position adjustment mechanism; 7. Sorting mechanism; 71. Lifting mechanism; 72. Horizontal conveying mechanism; 73. Sorting clamp; 74. Longitudinal conveying mechanism; 8. Workpiece clamping mechanism; 81. Clamping head; 82. Positioning center; 83. Driving mechanism; 9. Work station turntable; 91. Loading station; 92. Welding station; 93. Marking station; 94. Sorting station; 10. Inspection camera. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only the best 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 making creative efforts are within the scope of protection of the present invention.

[0020] This embodiment of the laser welding device based on machine vision sorting, such as Figure 1 The machine body 1 is composed of an upper box 11 and an electric control box 12. A display 13 is embedded on the upper box 11, and a controller 14 is hung on one side of the upper box 11 door. The upper box 11 is used to enclose a workpiece processing area. Figure 2-Figure 3As shown, a workstation turntable 9 is provided in the processing area. According to the welding process of tubular or joint workpieces, it generally includes laser welding, detection and laser marking. Therefore, a loading station 91, a welding station 92, a marking station 93 and a sorting station 94 are provided on the turntable station. The four stations are evenly arranged in a ring on the workstation turntable 9. Among them, the loading station 91 is located in the front side of the table, and the welding station 92 and the sorting station 94 are respectively located on the two sides of the table. The workstation turntable 9 is controlled by the controller 14 to rotate and switch each process in an orderly manner. The corresponding processing area is provided with a workpiece clamping mechanism 8, a laser welder 5, a detection camera 10, a laser moving mechanism 4, a laser marking system 6 and a sorting mechanism 7;

[0021] Among them, in order to save the arrangement space of the workstation turntable 9 in the processing area, the detection process and the laser welding process share the welding workstation 92, so the process switching between the two workstations is omitted, the laser welder 5 and the detection camera 10 are installed side by side on the base, and the detection camera 10 should be adjusted during installation to avoid the laser welder 5 blocking the weld area. In addition, since the detection camera 10 and the laser welder 5 are relatively stationary, the focus center thereof can be pre-adjusted. By setting the relative movement vector according to the welding coordinates of the laser welder 5, the focus center can be quickly aligned with the weld. The base is driven by the laser moving mechanism 4. Therefore, the laser welder 5 and the detection camera 10 can share the laser moving mechanism 4 to adjust the welding coordinates and the focus center coordinates.

[0022] like Figure 2 and Figure 3 As shown, the laser moving mechanism 4 includes a longitudinal drive mechanism 41 and a vertical drive mechanism 42. The longitudinal drive mechanism 41 is installed on the table of the machine body 1 and is located next to the welding station 92. It is used to lift and lower the laser welder 5 and the detection camera 10. The vertical drive mechanism 42 is provided on the longitudinal drive mechanism 41 and is used to longitudinally adjust the longitudinal coordinates of the laser welder 5 and the detection camera 10 according to the welding position of the workpiece. The base is fixed to the side of the driving end of the vertical drive mechanism 42. The longitudinal drive mechanism 41 is parallel to the positioning center line of the workpiece clamping mechanism 8. When the laser welder 5 is installed, its welding head should be aligned with the positioning center line of the welding station 92 directly below it.

[0023] Refer again Figure 2 and Figure 3Each workstation is provided with a workpiece clamping mechanism 8 for clamping and rotating the workpiece. In order to better ensure the coaxial accuracy of the circumferential welding process, the workpiece clamping mechanism 8 adopts a one-clamp-one-top positioning method, which includes a driving mechanism 83, a clamping head 81 and a positioning top 82. The clamping head 81 and the positioning top 82 are relatively collinearly arranged to determine the positioning center line of the workpiece clamping. One end of the workpiece is clamped in the clamping head 81, and the other end is supported by the positioning top 82 in conjunction with the positioning tapered hole thereon. The clamping head 81 is driven to rotate by the driving mechanism 83, and the controller 14 controls the driving mechanism 83 to perform feeding processing at a certain rotation speed.

[0024] Among them, such as Figure 2-Figure 3 As shown, the marking station 93 is located at the rear side of the table, and a laser marking system 6 is installed on it. The laser marking system 6 includes a laser marker 61, a distance adjustment mechanism 62 and a position adjustment mechanism 63. The distance adjustment mechanism 62 is installed on the table and is used to synchronously lift and lower the position adjustment mechanism 63 and the laser marker 61. The position adjustment mechanism 63 is supported by the distance adjustment mechanism 62. The laser marker 61 is set on the position adjustment mechanism 63. The position adjustment mechanism 63 can move laterally to adjust the lateral coordinate of the laser marker 61 so that the marking center of the laser marker 61 is accurately aligned with the central axis of the workpiece, that is, aligned with the positioning center line;

[0025] like Figure 1-Figure 3 As shown, the sorting station 94 sorts good and bad products according to the detection results of the detection camera 10, and a sorting mechanism 7 is provided on it. At the same time, a good product chute 2 and a bad product chute 3 with different sliding directions are provided on the table of the body 1, and the two extend out from different sides of the upper box 11 respectively. The sorting mechanism 7 includes a sorting claw 73, a lifting mechanism 71, a horizontal conveying mechanism 72 and a longitudinal conveying mechanism 74. The sorting claw 73 can be opened and closed to clamp and place the workpiece, which is installed at the driving end of the lifting mechanism 71. The horizontal conveying mechanism 72 is connected to the lifting mechanism 71 and is used for moving and conveying between the sorting station 94 and the longitudinal sorting track. The longitudinal conveying mechanism 74 is fixed on the table of the body 1, and the discharge ports of the good product chute 2 and the bad product chute 3 are located on the longitudinal sorting track of the longitudinal conveying mechanism 74. The horizontal conveying mechanism 72 is supported and driven by the longitudinal conveying mechanism 74.

[0026] For the connection between the components, electrical actuators, drivers, display 13 and controller 14 for realizing automatic control, the specific connection means can be referred to the above description. The connection relationships and connection means not mentioned are well known in the art and will not be described in detail herein.

[0027] The directional words such as "upper", "lower", "outer", "end", "side", "front", "back", "horizontal", and "vertical" mentioned in this article are based on the Figure 1-Figure 3These terms are mainly used to better describe the present invention and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation;

[0028] Furthermore, some of the above terms may be used to express other meanings besides indicating a direction or position relationship. For example, the term "upper" may also be used to express a certain dependency or connection relationship in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser welding device based on machine vision sorting, characterized by: It includes a machine body, a controller, a workpiece clamping mechanism, and a laser welder, a detection camera and a laser moving mechanism respectively connected to the controller. A welding station is set on the table of the machine body. The workpiece is clamped by the workpiece clamping mechanism and positioned horizontally and longitudinally on the welding station. The laser welder and the detection camera are arranged longitudinally and installed on a base. Both are located directly above the welding station. The base is driven by the laser moving mechanism to adjust the welding coordinates and the focusing center coordinates.

2. The laser welding device based on machine vision sorting according to claim 1, characterized in that: It also includes a workstation turntable, which is electrically connected to the controller. The workstation turntable is provided with a loading station, the welding station, the marking station and the sorting station, which is used for rotating and automatically switching between the various stations. The workpiece clamping mechanism is provided at each station.

3. The laser welding device based on machine vision sorting according to claim 2, characterized in that: The workpiece clamping mechanism includes a driving mechanism, a clamping head and a positioning center. The clamping head and the positioning center are arranged relative to each other and are used to position the workpiece on the positioning center line constructed by the two. One end of the workpiece is inserted and clamped on the clamping head, and the other end is supported by the positioning center. The clamping head is driven to rotate by the driving mechanism, and the driving mechanism is electrically connected to the controller.

4. The laser welding device based on machine vision sorting according to claim 3, characterized in that: The laser moving mechanism includes a longitudinal drive mechanism and a vertical drive mechanism. The longitudinal drive mechanism is installed on the table and is located next to the welding station. The vertical drive mechanism is arranged on the longitudinal drive mechanism. The base is fixed to the side of the drive end of the vertical drive mechanism. The welding head of the laser welder is aligned with the positioning center line directly below it.

5. The laser welding device based on machine vision sorting according to claim 2, characterized in that: The marking station is provided with a laser marking system, which includes a laser marker, a distance adjustment mechanism and a position adjustment mechanism. The laser marker is arranged on the position adjustment mechanism and is used to adjust the lateral position of the laser marker. The position adjustment mechanism is supported by the distance adjustment mechanism and is used to synchronously lift and lower the position adjustment mechanism and the laser marker.

6. The laser welding device based on machine vision sorting according to claim 2, characterized in that: The sorting station is provided with a sorting mechanism, and the table is provided with a good product chute and a defective product chute with different sliding directions. The sorting mechanism includes a sorting clamp, a lifting mechanism, a transverse conveying mechanism and a longitudinal conveying mechanism. The sorting clamp is installed on the lifting mechanism, and the longitudinal conveying mechanism is fixed on the table. The discharge ports of the good product chute and the defective product chute are located on the longitudinal sorting track of the longitudinal conveying mechanism. The longitudinal conveying mechanism supports and connects the transverse conveying mechanism, and the transverse conveying mechanism is connected to the lifting mechanism for moving and conveying between the sorting station and the longitudinal sorting track.

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