阅读说明：本技术 一种激光焊接焊缝视觉跟踪系统 (Laser welding seam visual tracking system ) 是由 宋维建 孙建军 黄承 于 2019-12-13 设计创作，主要内容包括：本发明公开了一种激光焊接焊缝视觉跟踪系统,包括激光焊接机Z轴,所述激光焊接机Z轴的正面下方设置有焊接头,焊接头的右侧面连接有线性模组,所述线性模组的右侧面固定在激光焊接机Z轴上,顶部设置有驱动其在移动模组安装架上作前后滑动的伺服电机,左侧外部设置有与激光焊接机Z轴固定连接的视觉组件安装板,所述视觉组件安装板的左侧面固定设置有光源安装架,光源安装架的底部固定连接有光源,顶部设置有相机,视觉组件安装板的下方设置有气刀。这种激光焊接焊缝视觉跟踪系统能有效找准焊接中心,降低定位工装的要求,适用于焊接轻度不规整焊缝的焊接机,使焊接头可以跟踪焊缝运行,从而增加良品率,保证焊接质量以及焊接效率。(The invention discloses a laser welding seam visual tracking system which comprises a Z shaft of a laser welding machine, wherein a welding head is arranged below the front surface of the Z shaft of the laser welding machine, the right side surface of the welding head is connected with a linear module, the right side surface of the linear module is fixed on the Z shaft of the laser welding machine, a servo motor for driving the linear module to slide back and forth on a movable module mounting frame is arranged at the top of the linear module, a visual component mounting plate fixedly connected with the Z shaft of the laser welding machine is arranged outside the left side of the linear module, a light source mounting frame is fixedly arranged on the left side surface of the visual component mounting plate, a light source is fixedly connected to the bottom of the light source mounting frame, a. The laser welding seam visual tracking system can effectively find the welding center, reduces the requirement of a positioning tool, is suitable for welding machines for welding slight irregular seams, enables a welding head to track the operation of the seams, and accordingly increases the yield and ensures the welding quality and the welding efficiency.)

1. The utility model provides a laser welding seam visual tracking system, includes laser-beam welding machine Z axle (22), its characterized in that: a welding head (7) with the top connected with an optical fiber is arranged below the front surface of a Z shaft (22) of the laser welding machine, the right side surface of the welding head (7) is connected with a linear module (8) capable of driving the welding head to move back and forth, the right side surface of the linear module (8) is provided with a movable module mounting rack (17), the movable module mounting rack (17) is fixedly connected onto the Z shaft (22) of the laser welding machine, the linear module (8) and the movable module mounting rack (17) are in sliding fit through a sliding block and a sliding groove which are mutually matched, the top of the linear module (8) is provided with a servo motor (13) driving the linear module mounting rack to slide back and forth on the movable module mounting rack (17) and form an X0 shaft, the outside of the left side of the linear module mounting rack is provided with a visual component mounting plate (6) fixedly connected with the Z shaft (22) of the laser welding machine, the left side, the bottom of the light source mounting frame (5) is fixedly connected with a circular light source (3) concentric with a central hole of the light source mounting frame, the top of the light source mounting frame is provided with a camera (1), a lens (2) of the camera (1) vertically faces downwards and corresponds to the center of the central hole in the light source mounting frame (5), and the camera (1) is fixedly connected to the left side face of the visual component mounting plate (6) through a camera mounting frame (14); an air knife (15) corresponding to the bottom of the light source (3) is arranged below the visual component mounting plate (6), and the air knife (15) is connected with an air knife bracket (16) fixedly connected below the right side of the visual component mounting plate (6); the camera (1), the light source (3), the linear module (8) and the servo motor (13) are connected with a PLC arranged outside a Z shaft (22) of the laser welding machine through a circuit and are controlled through the PLC.

2. The laser weld visual tracking system of claim 1, wherein: servo motor (13) pass through fixed setting motor mounting panel (9) fixed connection together of terminal surface before linear module (8), the transmission shaft in servo motor (13) and linear module (8) passes two preset through-holes on motor mounting panel (9) and extends in the preceding terminal surface outside of motor mounting panel (9), be provided with synchronous pulley (12) and lower synchronous pulley (10) respectively on the extension of transmission shaft in servo motor (13) and linear module (8), go up synchronous pulley (12) and connect through hold-in range (11) transmission down between synchronous pulley (10), servo motor (13) drive down synchronous pulley (10) through last synchronous pulley (12) and hold-in range (11) and rotate to drive linear module (8) back-and-forth movement on removal module mounting bracket (17).

3. The laser weld visual tracking system of claim 1, wherein: fixedly connected with cylinder mounting panel (21) on laser-beam welding machine Z axle (22), cylinder mounting panel (21) are located the top of removing module mounting bracket (17), and its right flank is fixed and is provided with cylinder (20), the one end that has the piston rod on cylinder (20) is down, and its end fixing is provided with pipe clamp (19) of blowing, be fixed with blow pipe (18) that end-to-end connection protection trachea, oral area and soldered connection (7) correspond on pipe clamp (19) of blowing, blow pipe (18) are through piston rod drive pipe clamp (19) of blowing and are realized the up-and-down motion.

4. The laser weld visual tracking system of claim 1, wherein: the dust removal device is characterized in that a dust removal pipe (4) is fixedly connected to a Z shaft (22) of the laser welding machine through a mounting plate, the dust removal pipe (4) is located below the left side of the light source (3), the head of the dust removal pipe is bent and corresponds to the welding head (7), and the tail end of the dust removal pipe is connected with an air extractor arranged outside the Z shaft (22) of the laser welding machine through a hose.

5. The laser weld visual tracking system of claim 2, wherein: and dustproof shells are arranged on the outer sides of the lower synchronous pulley (10), the synchronous belt (11) and the upper synchronous pulley (12).

6. The laser weld visual tracking system of claim 2, wherein: the lower synchronous pulley (10) and the upper synchronous pulley (12) are both toothed wheels, and the synchronous belt (11) is a toothed belt and is in toothed meshing with the lower synchronous pulley (10) and the upper synchronous pulley (12).

7. The laser weld visual tracking system of claim 3, wherein: the two blowing pipes (18) are symmetrically arranged on the left side and the right side of the welding head (7), and the two blowing pipes (18) are connected with a blowing pipe clamp (19) which is sleeved on the outer side of the top of the welding head (7) and is connected with a piston rod of the air cylinder (20).

Technical Field

The invention relates to the field of laser welding of ion-exchange membrane electrolytic cells, in particular to a visual tracking system for a laser welding seam.

Background

The chlor-alkali industry is one of the most basic chemical industries, and the current domestic production modes are a diaphragm method and an ion exchange membrane method; ion membrane electrolyzers are common components in the modern chlor-alkali industry. In the manufacturing process of the ion membrane electrolytic cell, the grid plate is welded with other parts, which is a big problem.

At present, the welding of the ion membrane electrolytic cell and the fixing work of the grid plate are finished manually, and the requirements of the rest parts on the positions are not particularly strict, so that the welding requirement points of the grid plate and the connecting plate are not on the same straight line, and the welding center points are irregularly offset left and right. However, due to the action of the ion membrane electrolytic cell in the chlor-alkali industry, the welding contact length and quality of the grid plate and the frame have strict requirements, and although a manual welding mode can meet certain requirements, the manual welding consumes more time, and the production efficiency is not high.

Due to the development of modern industry, the laser welding process is continuously improved, the specific gravity of laser welding in industrial application is continuously increased, the laser welding can finish welding with higher quality at higher speed, and the production efficiency is improved; but because the welding of ionic membrane electrolysis trough and grid plate fixed its welding point belong to irregular arrangement, the welding of current laser welding mode is easy to weld partially, consequently need artifical repair welding after welding, and the loss still appears easily to the inefficiency.

Disclosure of Invention

The invention aims to solve the technical problem of providing a laser welding seam visual tracking system which can track a welding seam, can fully weld a workpiece and improve the welding efficiency.

In order to solve the technical problems, the invention is realized by the following technical scheme: a laser welding seam visual tracking system comprises a laser welding machine Z shaft, wherein a welding head with the top connected with an optical fiber is arranged below the front side of the laser welding machine Z shaft, the right side surface of the welding head is connected with a linear module capable of driving the welding head to move back and forth, the right side surface of the linear module is provided with a movable module mounting rack which is fixedly connected on the laser welding machine Z shaft, the linear module and the movable module mounting rack are in sliding fit through a slide block and a slide groove which are mutually matched, the top of the linear module is provided with a servo motor for driving the linear module to slide back and forth on the movable module mounting rack and form an X0 shaft, the visual component mounting plate fixedly connected with the laser welding machine Z shaft is arranged outside the left side of the linear module mounting rack, and the left side surface of the visual component mounting plate is fixedly provided with, the bottom of the light source mounting frame is fixedly connected with an annular light source concentric with a central hole of the light source mounting frame, the top of the light source mounting frame is provided with a camera, a lens of the camera is vertically downward and corresponds to the center of the central hole on the light source mounting frame, and the camera is fixedly connected to the left side surface of the visual component mounting plate through the camera mounting frame; an air knife corresponding to the bottom of the light source is arranged below the vision component mounting plate and connected with an air knife bracket fixedly connected below the right side of the vision component mounting plate; the camera, the light source, the linear module and the servo motor are connected with a PLC arranged outside a Z shaft of the laser welding machine through a circuit and are controlled through the PLC.

Preferably, the servo motor is fixedly connected with the motor mounting plate fixedly arranged on the front end face of the linear module, the servo motor and a transmission shaft in the linear module penetrate through two preset through holes in the motor mounting plate and extend to the outer side of the front end face of the motor mounting plate, an upper synchronous belt pulley and a lower synchronous belt pulley are respectively arranged on the extension ends of the transmission shaft in the servo motor and the linear module, the upper synchronous belt pulley and the lower synchronous belt pulley are connected through synchronous belt transmission, and the servo motor drives the lower synchronous belt pulley to rotate through the upper synchronous belt pulley and the synchronous belt, so that the linear module is driven to move back and forth on the movable module mounting frame.

Preferably, the laser welding machine is characterized in that a cylinder mounting plate is fixedly connected to the Z shaft of the laser welding machine and located above the movable module mounting frame, a cylinder is fixedly arranged on the right side face of the cylinder, one end, provided with a piston rod, of the cylinder faces downwards, a blowing pipe clamp is fixedly arranged at the end of the cylinder, a blowing pipe, corresponding to the welding head, of the mouth portion of the protective gas pipe and the blowing pipe clamp, connected at the tail end of the blowing pipe clamp, is fixed to the blowing pipe clamp, and the blowing pipe drives the blowing pipe clamp to.

Preferably, the laser welding machine is fixedly connected with a dust removal pipe through a mounting plate on the Z axis, the dust removal pipe is positioned below the left side of the light source, the head of the dust removal pipe is bent and corresponds to the welding head, and the tail end of the dust removal pipe is connected with an air extractor arranged outside the Z axis of the laser welding machine through a hose.

Preferably, the outer sides of the lower synchronous pulley, the synchronous belt and the upper synchronous pulley are provided with dustproof shells.

Preferably, the lower synchronous pulley and the upper synchronous pulley are both toothed wheels, and the synchronous belt is a toothed belt which is in toothed engagement with the lower synchronous pulley and the upper synchronous pulley.

Preferably, the number of the air blowing pipes is two, the two air blowing pipes are symmetrically arranged on the left side and the right side of the welding head, and the two air blowing pipes are connected through an air blowing pipe clamp which is sleeved on the outer side of the top of the welding head and connected with a piston rod of the air cylinder.

Compared with the prior art, the invention has the advantages that: the laser welding seam visual tracking system can effectively find the welding center, reduces the requirement of a positioning tool, is suitable for welding machines for welding slight irregular seams, enables a welding head to track the operation of the seams, and accordingly increases the yield and ensures the welding quality and the welding efficiency.

Drawings

The invention is further described below with reference to the accompanying drawings.

Fig. 1 and fig. 2 are schematic perspective views of a laser welding seam visual tracking system according to the present invention.

In the figure: 1. a camera; 2. a lens; 3. a light source; 4. a dust removal pipe; 5. a light source mounting bracket; 6. a vision assembly mounting plate; 7. welding a head; 8. a linear module; 9. a motor mounting plate; 10. a lower synchronous pulley; 11. a synchronous belt; 12. an upper synchronous pulley; 13. a servo motor; 14. a camera mounting bracket; 15. an air knife; 16. an air knife bracket; 17. a mobile module mounting rack; 18. an air blowing pipe; 19. an air blowing pipe clamp; 20. a cylinder; 21. a cylinder mounting plate; 22. laser-beam welding machine Z axle.

Detailed Description

The invention is described in detail below with reference to the following figures and embodiments:

the laser welding seam visual tracking system shown in fig. 1 and 2 comprises a laser welding machine Z shaft 22, a welding head 7 with the top connected with an optical fiber is arranged below the front side of the laser welding machine Z shaft 22, the right side surface of the welding head 7 is connected with a linear module 8 capable of driving the welding head to move back and forth, the right side surface of the linear module 8 is provided with a movable module mounting rack 17, the movable module mounting rack 17 is fixedly connected on the laser welding machine Z shaft 22, the linear module 8 and the movable module mounting rack 17 are in sliding fit through a sliding block and a sliding groove which are mutually matched, the top of the linear module 8 is provided with a servo motor 13 for driving the linear module to slide back and forth on the movable module mounting rack 17 and form an X0 shaft, the left outside of the linear module 8 is provided with a visual component mounting rack 6 fixedly connected with the laser welding machine Z shaft 22, and the left side surface of the visual component mounting rack 6 is fixedly, the bottom of the light source mounting frame 5 is fixedly connected with an annular light source 3 concentric with a central hole of the light source mounting frame, the top of the light source mounting frame is provided with a camera 1, a lens 2 of the camera 1 is vertically downward and corresponds to the center of the central hole on the light source mounting frame 5, and the camera 1 is fixedly connected to the left side surface of the visual component mounting plate 6 through a camera mounting frame 14; an air knife 15 corresponding to the bottom of the light source 3 is arranged below the vision component mounting plate 6, and the air knife 15 is connected with an air knife bracket 16 fixedly connected below the right side of the vision component mounting plate 6; the camera 1, the light source 3, the linear module 8 and the servo motor 13 are connected with a PLC arranged outside the Z shaft 22 of the laser welding machine through a circuit and are controlled through the PLC.

In order to ensure that the servo motor 13 can be bound with the linear module 8, and the linear module 8 can drive the motion of the servo motor 13, the servo motors 13 are fixedly connected together through a motor mounting plate 9 fixedly arranged on the front end surface of the linear module 8, the servo motor 13 and a transmission shaft in the linear module 8 penetrate through two preset through holes on the motor mounting plate 9 and extend outside the front end surface of the motor mounting plate 9, the servo motor 13 and the extending end of the transmission shaft in the linear module 8 are respectively provided with an upper synchronous belt wheel 12 and a lower synchronous belt wheel 10, the upper synchronous belt wheel 12 and the lower synchronous belt wheel 10 are in transmission connection through a synchronous belt 11, and the servo motor 13 drives the lower synchronous belt wheel 10 to rotate through the upper synchronous belt wheel 12 and the synchronous belt 11, so that the linear module 8 is driven to move back and forth on the movable module mounting frame 17.

In order to ensure the welding quality of the welding head 7, an air cylinder mounting plate 21 is fixedly connected to a Z shaft 22 of the laser welding machine, the air cylinder mounting plate 21 is positioned above the movable module mounting frame 17, an air cylinder 20 is fixedly arranged on the right side surface of the air cylinder, one end of the air cylinder 20 with a piston rod faces downwards, an air blowing pipe clamp 19 is fixedly arranged at the end part of the air cylinder 20, an air blowing pipe 18 with a tail end connected with a protective air pipe and an opening part corresponding to the welding head 7 is fixed on the air blowing pipe clamp 19, and the air blowing pipe 18 drives the air blowing pipe clamp 19 through the; the two blowing pipes 18 are symmetrically arranged on the left side and the right side of the welding head 7, and the two blowing pipes 18 are connected through a blowing pipe clamp 19 which is sleeved on the outer side of the top of the welding head 7 and is connected with a piston rod of an air cylinder 20.

In order to prevent welding head 7 from falling on welding spots to affect welding during welding, dust removal pipe 4 is fixedly connected to laser welding machine Z shaft 22 through a mounting plate, dust removal pipe 4 is located below the left side of light source 3, the head of dust removal pipe is bent and corresponds to welding head 7, and the tail end of dust removal pipe is connected with an air extractor arranged outside laser welding machine Z shaft 22 through a hose.

In order to prevent welding slag or dust from falling and depositing and affecting the transmission between the linear module 8 and the servo motor 13, the outer sides of the lower synchronous pulley 10, the synchronous belt 11 and the upper synchronous pulley 12 are provided with dustproof shells.

In order to ensure the transmission stability between the lower synchronous pulley 10 and the upper synchronous pulley 12, the lower synchronous pulley 10 and the upper synchronous pulley 12 are both toothed wheels, and the synchronous belt 11 is a toothed belt which is in toothed engagement with the lower synchronous pulley 10 and the upper synchronous pulley 12.

The specific working principle is as follows: firstly, adjusting a machine tool host according to the welding requirements of a welding part, inputting specific welding parameters by a user, editing a corresponding welding program, moving a Z shaft 22 of a laser welding machine to a welding start position after the editing is finished, and operating the machine tool to start welding; after welding starts, the photographing interval time of the camera 1 is calculated, the camera 1 takes pictures of a welding piece at intervals in a specified time through the lens 2, the light source 3 is turned on during photographing, light is supplemented to a photographing area, so that the camera 1 can take pictures more clearly, and a vision system can conveniently process the pictures; meanwhile, the air knife 15 blows air to prevent welding slag generated by welding of the welding head 7 from splashing on the light source 3, the lens 2 and the camera 1 and burning out the devices; processing the image generated by photographing through an external visual system to generate coordinate data, writing the coordinate data into a buffer area, reading the data from the buffer area by an external PLC, and processing the data to generate compensation coordinates; then the PLC controls the servo motor 13 to move through servo drive according to the generated data, the servo motor 13 drives the upper synchronous belt wheel 12 connected with the servo motor to rotate, and drives the lower synchronous belt wheel 10 to rotate through the synchronous belt 11, so as to drive the linear module 8 connected with the servo motor to move, then the linear module 8 drives the welding head 7 connected with the servo motor to move, so that welding position compensation is carried out, the welding point of the welding head 7 can be on the welding center of a welding piece, and the welding quality is guaranteed. When welding, the air cylinder 20 moves in a ventilation mode, the air blowing pipe 18 is conveyed to a welding point corresponding to the welding head 7 through the piston rod, meanwhile, welding shielding gas is blown out, welding quality is guaranteed, when the welding head 7 welds, the dust removal pipe is used for exhausting air towards the periphery of the welding head 7, welding slag is sucked away, and the welding slag is prevented from falling on the welding point and affecting the welding effect.

The visual tracking system for the laser welding seam can effectively find the welding center, and can realize accurate welding through an X, Y, Z shaft driven by a servo on a laser welding machine tool and an X0 shaft compensated in position, wherein the welding precision is +/-0.15 mm from the welding center of a grid plate; during welding, a camera 1 firstly takes pictures to take points, then offset coordinates are formed through processing of software and a PLC and transmitted to a host, the host controls a Y axis and an X0 axis to perform position compensation, a welding head 7 is enabled to accurately find the position, the welding seam is ensured to be good, meanwhile, the requirement of a positioning tool is lowered, the welding machine is suitable for welding slight irregular welding seams, the welding head can track the operation of the welding seams, the yield is increased, and the welding quality and the welding efficiency are ensured.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.