An automobile parts welding machine

Abstract

The application discloses a kind of automobile parts welding machine, it is related to laser welding technical field, the present application includes protection component and rotary cylinder, the protection component includes lifting assembly and push frame, one end of the push frame is rotatably connected with slide pipe, the other end is connected with lifting assembly, the cavity both sides are provided with guide frame, the slide pipe slides in guide frame, the slide pipe end is rotatably connected with gear one, the rotary cylinder both ends are rotatably connected with corresponding gear one, and the intermediate rod is fixed between the rotary cylinder both ends and corresponding gear one, the cavity side wall is provided with rack one parallel with guide frame, and the rack one is engaged with corresponding gear one. The advantages are that: the lifting assembly, push frame and gear rack cooperation structure are set in the application, the rotary cylinder can move along the laser head axial direction and rotate synchronously, so that the dynamic processing of the surface of optical protection piece is realized, and long-term attachment of pollutants is avoided.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a welding machine for automotive parts. Background Technology

[0002] Laser welding utilizes a high-energy-density laser beam to act on the workpiece, causing the material to rapidly heat up to a molten or vaporized state in a very short time. With the help of an auxiliary gas, the material is joined or removed, thus completing the welding or cutting process. The laser beam is transmitted and focused by optical elements and then output to the workpiece surface from the nozzle end. Therefore, the state of the optical elements has a significant impact on laser energy transfer and processing quality.

[0003] In actual processing, the workpiece will generate a large amount of metal vapor, smoke and dust and splash particles under the action of laser. Under the action of high temperature and the influence of thermal convection, these gases and particles tend to rise along the direction of the laser head and accumulate in the area near the nozzle. At the same time, under the action of airflow disturbance, some particles will adhere to the surface of the optical protective component at the front end of the laser head. As the processing time increases, they gradually accumulate, which leads to a decrease in the light transmittance of the optical components, affects the stability of laser output, and even causes a decrease in the quality of the laser spot and processing defects.

[0004] Existing technologies typically use a gas blowing structure at the laser head to blow away the surface of optical protective components to reduce particle deposition. However, this method mainly relies on the airflow to blow away attached particles, which has limited effectiveness in removing contaminants that have already adhered or stuck. Furthermore, it is still difficult to avoid the gradual accumulation of contaminants during continuous processing, which affects processing efficiency and the stable operation of the equipment. Therefore, it is necessary to provide a structure that can effectively treat optical protective components during laser processing. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automotive parts welding machine that solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A welding machine for automotive parts includes a welding table with a laser head movably mounted on it. The laser head has a cavity inside, and a protective lens is installed inside the cavity. The machine also includes a protective assembly and a rotating cylinder. The protective assembly includes a lifting assembly and a pusher frame. Two pusher frames are provided. One end of the pusher frame is rotatably connected to a slide tube, and the other end is connected to the lifting assembly. Guide frames are provided on both sides of the cavity. The slide tube slides inside the guide frames. A gear is rotatably connected to the end of the slide tube. An intermediate rod is fixed between each end of the rotating cylinder and the corresponding gear. The rotating cylinder moves axially to the outside of the protective lens and is positioned corresponding to its surface. A rack parallel to the guide frame is provided on the side wall of the cavity. The rack meshes with the corresponding gear. A dust cover and an arc-shaped cover are used to protect the rotating drum from dust. The dust cover is connected to the slide tube, and the arc-shaped cover is rotatably installed inside the dust cover. An opening and closing component is provided between the arc-shaped cover and the dust cover. A cleaning assembly for dust removal from the rotating drum is housed inside the dust cover.

[0007] Furthermore, the outer wall of the rotating cylinder is provided with bristles, the slide tube is connected to the inside of the rotating cylinder, and several dust suction holes are opened through the rotating cylinder, alternating with the bristles. A negative pressure device is connected to the end of the slide tube.

[0008] Furthermore, the dust cover includes a cavity, the cleaning component is disposed inside the cavity, and baffles are provided at the ends of the rack and dust cover near the rotating cylinder.

[0009] Furthermore, the cleaning component includes a fixed plate, which is fixed inside the cavity. Several movable columns are inserted into the fixed plate, and scrapers are connected to the ends of the movable columns. Several springs are arranged between the scrapers and the fixed plate, and the ends of the springs are attached to the rotating cylinder.

[0010] Furthermore, the opening and closing assembly includes two sleeves, which are respectively set at both ends of the arc-shaped cover. The sleeves are fitted on the outside of the corresponding intermediate rod. The dust cover has through holes on both sides for the sleeves to rotate. Gear II is provided on the outside of each sleeve. Two racks II are fixed on the side wall of the cavity, and the racks II mesh with the corresponding gear II.

[0011] Furthermore, the lifting assembly includes a drive screw and a lifting plate. The drive screw is rotatably connected inside the cavity, and a motor that drives the drive screw to rotate is installed inside the cavity. The two ends of the lifting plate are rotatably connected to the corresponding push frame. A threaded sleeve is also rotatably installed in the middle of the lifting plate, and the threaded sleeve is threadedly connected to the outside of the drive screw.

[0012] Furthermore, after the dust cover and the arc-shaped cover are closed, a dustproof chamber is formed that covers the outside of the rotating cylinder.

[0013] Furthermore, the dust cover is provided with two connecting ears, which are used to fix the dust cover to the slide tube.

[0014] Compared with existing technologies, the advantages of this invention are: 1. This invention, by setting up a lifting assembly, a pushing frame, and a gear and rack structure, enables the rotating cylinder to move along the laser head axis and rotate synchronously, thereby achieving dynamic treatment of the surface of the optical protective component and avoiding long-term adhesion of contaminants.

[0015] 2: This invention improves pollutant removal efficiency by setting bristles and dust suction holes on the outside of the rotating cylinder and using a negative pressure device to agitate and remove attached particles at the same time.

[0016] 3: The present invention uses an opening and closing structure consisting of a dust cover and an arc-shaped cover to seal and protect the rotating cylinder when it is not in operation, thereby preventing external dust from causing secondary pollution to the cleaning components.

[0017] 4. This invention, by setting an elastic scraper structure, continuously scrapes the surface of the rotating cylinder during rotation, preventing contaminants from accumulating on the surface of the rotating cylinder and ensuring the long-term effectiveness of the cleaning components. In addition, the setting of the dust cover and the baffle on the arc-shaped cover can reduce the dispersion of scraped dust and reduce secondary pollution to the protective lens. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an automotive parts welding machine proposed in this invention; Figure 2 This is a top view of the welded joint; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 for Figure 4 A schematic diagram of the structure in which the threaded sleeve is used in conjunction with the push frame; Figure 6 for Figure 5 A structural diagram from another perspective; Figure 7 for Figure 6 Schematic diagram of the rotating cylinder; Figure 8 for Figure 7 Top view; Figure 9 for Figure 8 Sectional view of CC; Figure 10 for Figure 9 A schematic diagram of the structure of the arc-shaped cover.

[0019] In the diagram: 1. Welding table; 11. Moving frame; 2. Laser head; 21. Component; 22. Protective lens; 23. Cavity; 3. Drive screw; 31. Lifting plate; 32. Threaded sleeve; 33. Pushing frame; 34. Sliding tube; 35. Guide frame; 36. Rotating cylinder; 361. Brush bristles; 362. Dust suction hole; 37. Gear 1; 38. Rack 1; 4. Dust cover; 40. Connecting ear; 41. Convex cavity; 42. Arc-shaped cover; 43. Sleeve; 44. Gear 2; 45. Rack 2; 46. Baffle; 5. Fixing plate; 51. Scraper; 52. Moving column; 53. Spring. Detailed Implementation

[0020] To improve the contamination resistance of optical protective components during laser welding, such as... Figures 1-10 As shown, this embodiment provides an automotive parts welding machine, which includes a welding table 1 and a movable frame 11 on the welding table 1. The movable frame 11 is used to drive the laser head 2 to move along a predetermined trajectory on the welding table 1, thereby realizing continuous welding processing of workpieces at different positions. The laser head 2 is equipped with an optical element 21 and a protective lens 22 is installed inside the cavity 23 to isolate the high-temperature gas and particles generated during the welding process and prevent them from directly entering the optical system. In the actual welding process, the metal material melts or even vaporizes rapidly under the action of the laser, generating a large amount of metal vapor and fine particles. These particles move upward under the action of thermal convection and gradually accumulate towards the front end of the laser head, becoming the main source of contamination of the optical protective component.

[0021] In order to actively treat the above-mentioned pollutants, such as Figures 3-5 As shown, a protective assembly and a rotating cylinder 36 are installed inside the laser head 2. The protective assembly includes a lifting assembly and a pusher frame 33. The lifting assembly consists of a drive screw 3, a lifting plate 31, and a threaded sleeve 32. The drive screw 3 is rotated by a motor, causing the threaded sleeve 32 to move axially, thereby driving the lifting plate 31 to move up and down. Both ends of the lifting plate 31 are connected to the pusher frame 33, and the other end of the pusher frame 33 is rotatably connected to the slide tube 34, so that the slide tube 34 can move axially during the lifting process without swaying. In use, by controlling the rotation of the drive screw 3, the rotating cylinder 36 can move closer to the protective lens 22, thereby entering the cleaning station, or move away from the area to enter the standby position, realizing the on-demand operation of the structure.

[0022] Based on achieving axial movement, in order to ensure that the rotating cylinder 36 synchronously generates rotational motion during the movement, such as Figure 4 or Figure 5 As shown, guide frames 35 are provided on both sides of the cavity 23, and the slide tube 34 is slidably disposed in the guide frames 35. A gear 37 is installed at the end of the slide tube 34. A rack 38 parallel to the guide frames 35 is provided on the side wall of the cavity 23. The gear 37 and the rack 38 mesh with each other. The rotating cylinder 36 is fixedly connected to the gear 37 through the intermediate rod. When the slide tube 34 moves linearly along the guide frame 35, the gear 37 rotates under the constraint of the rack 38, thereby driving the rotating cylinder 36 to rotate synchronously. Through this structure, the rotating cylinder 36 can generate circumferential motion when it approaches the protective lens 22, thereby disturbing the particles attached to the surrounding area and improving the subsequent cleaning effect.

[0023] To further improve the removal effect, such as Figure 7As shown, brush bristles 361 are provided on the outside of the rotating cylinder 36, and multiple suction holes 362 are opened on the rotating cylinder 36. The suction holes 362 are connected to the inside of the sliding tube 34, and the end of the sliding tube 34 is connected to an external negative pressure device. In actual operation, when the rotating cylinder 36 rotates, the brush bristles 361 first contact the particles attached to the vicinity of the protective lens 22, agitating and loosening them, causing the particles to detach from their attached state. At the same time, driven by the rotation, the particles move towards the suction holes 362 under the centrifugal force and airflow disturbance, and are sucked into the sliding tube 34 under the action of negative pressure, thereby achieving timely removal of particles. This structure changes the cleaning process from a simple blowing to a combination of disturbance and adsorption, significantly improving the treatment effect.

[0024] Considering that cleaning components are easily contaminated by external dust when not in use, such as Figures 8-10 As shown, a dust cover 4 is provided on the outside of the slide tube 34, and an arc-shaped cover 42 is provided inside the dust cover 4. The two are connected by an opening and closing assembly, which consists of a sleeve 43, a gear 44, and a rack 45. When the slide tube 34 drives the rotating cylinder 36 to move, the sleeve 43 rotates under the action of the rack 45, thereby driving the arc-shaped cover 42 to open or close. After the rotating cylinder 36 leaves the working area, the arc-shaped cover 42 and the dust cover 4 close to form a closed space, covering the rotating cylinder 36 inside, thereby isolating external dust and preventing it from adhering to the cleaning structure, ensuring the cleaning effect of subsequent use.

[0025] To prevent dust accumulation on the rotating drum 36 during long-term use, such as Figure 9 As shown, a cleaning component is installed inside the dust cover 4. The cleaning component includes a fixed plate 5, a moving column 52, a scraper 51, and a spring 53. Under the action of the spring 53, the scraper 51 always adheres to the outer surface of the rotating cylinder 36. When the rotating cylinder 36 rotates, the scraper 51 continuously scrapes its surface to remove the dust attached to it, thereby preventing particles from accumulating on the surface of the rotating cylinder 36, ensuring that the dust suction hole 362 is unobstructed, and improving the overall cleaning efficiency.

[0026] During the cleaning process, the scraped particles are easily diffused outwards by the rotational disturbance. To prevent these particles from re-entering the optical area, such as... Figure 9 As shown, a baffle 46 is provided on the side of the dust cover 4 near the rotating cylinder 36. The baffle 46 and the dust cover 4 together form a partially semi-enclosed space. When the scraper 51 is working, the peeled particles are confined in this space and sucked away under negative pressure, thereby preventing the particles from spreading towards the protective lens 22 and effectively reducing the possibility of secondary pollution.

[0027] To ensure structural stability, such as Figure 6As shown, a connecting ear 40 is provided on the dust cover 4. The dust cover 4 is fixed to the slide tube 34 through the connecting ear 40, so that the dust cover 4 can move synchronously with the slide tube 34, thereby always maintaining a consistent relative position with the rotating cylinder 36 and ensuring the coordinated work between the components.

[0028] Compared with existing technologies that rely solely on gas jet cleaning, this invention utilizes a rotating cylinder structure that can move axially and rotate synchronously, combined with brush agitation, negative pressure adsorption, elastic scraping, and a closed protective structure, to achieve multi-path treatment of contaminants. This not only effectively removes attached particles but also controls the particle diffusion path during the cleaning process, preventing secondary pollution. Consequently, it significantly improves the cleaning efficiency and lifespan of optical components during laser welding and enhances equipment operational stability.

[0029] In actual use, the working process of this device is as follows: When the laser head 2 is performing welding operations, the lifting assembly is in the initial position and the rotating cylinder 36 is in the non-working area to avoid affecting the normal output of the laser. As the welding time increases, when particle accumulation is detected near the protective lens 22 or when the preset time is reached, the drive motor starts and drives the drive screw 3 to rotate, causing the lifting plate 31 to move downward, thereby driving the slide tube 34 and the rotating cylinder 36 to move closer to the protective lens 22.

[0030] During the movement, gear 37 rotates under the action of rack 38, driving the rotating cylinder 36 to rotate synchronously. When the rotating cylinder 36 enters the working position, its outer bristles 361 disturb the attached particles, causing the particles to detach from the surface. At the same time, the negative pressure equipment is activated, and the particles are adsorbed and removed through the dust suction hole 362. During this process, the scraper 51 simultaneously scrapes the surface of the rotating cylinder 36 to prevent particles from accumulating on its surface.

[0031] After cleaning is completed, the lifting component moves in the opposite direction, causing the rotating cylinder 36 to leave the working area. During the movement, the arc-shaped cover 42 gradually closes under the action of the opening and closing component, eventually forming a closed cavity with the dust cover 4, covering the rotating cylinder 36 inside. At the same time, the baffle 46 restricts the residual particles, allowing them to be removed under negative pressure and preventing them from escaping. Through the above process, periodic cleaning of the optical protective components is achieved, effectively reducing particle adhesion and improving the stability of laser welding.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A welding machine for automotive parts, comprising a welding table (1), wherein a laser head (2) is movably disposed on the welding table (1), and a cavity (23) is formed inside the laser head (2), wherein a protective lens (22) is installed inside the cavity (23), characterized in that, Also includes: The protective assembly includes a lifting assembly and a pusher frame (33). There are two pusher frames (33). One end of the pusher frame (33) is rotatably connected to a slide tube (34), and the other end is connected to the lifting assembly. Guide frames (35) are provided on both sides of the cavity (23). The slide tube (34) slides inside the guide frame (35). Gear 1 (37) is rotatably connected to the end of the slide tube (34). An intermediate rod is fixed between the two ends of the rotating cylinder (36) and the corresponding gear 1 (37). The rotating cylinder (36) moves axially to the outside of the protective lens (22) and is set corresponding to its surface. A rack 1 (38) parallel to the guide frame (35) is provided on the side wall of the cavity (23). The rack 1 (38) meshes with the corresponding gear 1 (37). A dust cover (4) and an arc-shaped cover (42) are used to protect the rotating cylinder (36) from dust. The dust cover (4) is connected to the slide tube (34). The arc-shaped cover (42) is rotatably disposed inside the dust cover (4). An opening and closing assembly is provided between the arc-shaped cover (42) and the dust cover (4). A cleaning assembly for dust removal from the rotating drum (36), the cleaning assembly being disposed inside the dust cover 4.

2. The automotive parts welding machine according to claim 1, characterized in that, The outer wall of the rotating cylinder (36) is provided with bristles (361), the slide tube (34) is connected to the inside of the rotating cylinder (36), and a number of dust suction holes (362) alternately arranged with the bristles (361) are opened through the rotating cylinder (36). A negative pressure device is connected to the end of the slide tube (34).

3. The automotive parts welding machine according to claim 1, characterized in that, The dust cover (4) includes a cavity (41), the cleaning component is disposed inside the cavity (41), and baffles (46) are provided on the end of the rack (45) and the dust cover (4) near the rotating cylinder (36).

4. The automotive parts welding machine according to claim 2, characterized in that, The cleaning assembly includes a fixed plate (5) which is fixed inside the cavity (41). Several movable columns (52) are inserted into the fixed plate (5). The ends of the movable columns (52) are connected to scrapers (51). Several springs (53) are provided between the scrapers (51) and the fixed plate (5). The ends of the springs (53) are attached to the rotating cylinder (36).

5. The automotive parts welding machine according to claim 1, characterized in that, The opening and closing assembly includes two sleeves (43), which are respectively disposed at both ends of the arc-shaped cover (42). The sleeves (43) are sleeved on the outside of the corresponding intermediate rod. The dust cover (4) has through holes on both sides for the sleeves (43) to rotate. Gears (44) are provided on the outside of each sleeve (43). Two racks (45) are fixed on the side wall of the cavity (23). The racks (45) mesh with the corresponding gears (44).

6. The automotive parts welding machine according to claim 1, characterized in that, The lifting assembly includes a drive screw (3) and a lifting plate (31). The drive screw (3) is rotatably connected inside the cavity (23). A motor for driving the drive screw (3) to rotate is provided inside the cavity (23). The two ends of the lifting plate (31) are rotatably connected to the corresponding push frame (33). A threaded sleeve (32) is also rotatably provided in the middle of the lifting plate (31). The threaded sleeve (32) is threadedly connected to the outside of the drive screw (3).

7. The automotive parts welding machine according to claim 5, characterized in that, After the dust cover (4) and the arc-shaped cover (42) are closed, a dustproof cavity is formed covering the outside of the rotating cylinder (36).

8. The automotive parts welding machine according to claim 1, characterized in that, The dust cover (4) is provided with two connecting ears (40), and the dust cover (4) is fixedly connected to the slide tube (34) through the connecting ears (40).

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