A laser welding device for machining mechanical parts

Abstract

This invention relates to the field of intelligent welding system technology, specifically a laser welding device for processing mechanical parts. It includes a welding worktable body, a laser welder body, a fixed frame rotatably mounted outside the laser welder body, and a laser welding head fixedly mounted at the output end of the laser welder body. A corrugated telescopic ring is fixedly connected to the inner wall of the fixed frame. The beneficial effect of this invention is that during the left-right swaying of the gas supply frame, because the inner contour of the trapezoidal groove is set as a frustum, as the ball moves deeper into the trapezoidal groove, the inner contour of the trapezoidal groove becomes larger the deeper it goes. At this time, the gas in the gas supply frame will be ejected through the gap between the ball and the trapezoidal groove towards the outer wall of the laser welding head. The ejected gas can carry away the high temperature accumulated on the outer wall of the laser welding head due to mirror reflection, thus cooling the laser welding head.

Description

Technical Field

[0001] This invention relates to the field of intelligent welding system technology, specifically to a laser welding device for processing mechanical parts. Background Technology

[0002] Intelligent welding systems are welding systems that achieve full-process automation and intelligence in sensing, analysis, decision-making, execution and optimization. Laser welding is usually used in intelligent welding systems. Laser welding does not require welding rods and uses a high-energy-density laser beam as a heat source to perform precision welding on mechanical parts.

[0003] Currently, laser welding equipment for machining mechanical parts typically requires an external shielding gas device. This device continuously blows shielding gas towards the laser welding area for protection. Nitrogen is commonly used as the shielding gas, which can help prevent oxidation and porosity at the weld. However, existing laser welding equipment usually uses coaxial or side-blowing methods for the shielding gas. This method cannot cover complex welding situations when welding mechanical parts with more complex welds. Furthermore, when welding parts with a "smooth" surface, some of the laser light is reflected back to the welding head, which can easily cause overheating of the laser welding head and internal optical components. Summary of the Invention

[0004] This invention provides a laser welding device for machining mechanical parts. To achieve the above objective, this invention provides the following technical solution: A laser welding device for machining mechanical parts includes a welding worktable body, a laser welder body, a fixed frame rotatably mounted outside the laser welder body, and a laser welding head fixedly mounted at the output end of the laser welder body. A corrugated telescopic ring is fixedly connected to the inner wall of the fixed frame, and a jetting unit for jetting air towards the laser welding head is fixedly mounted on the outer wall of the corrugated telescopic ring. The jetting unit includes a gas delivery frame, which is fixedly connected to the outer wall of the corrugated telescopic ring.

[0005] Also includes:

[0006] A diffusion unit is used to increase the coverage of the jet unit. The diffusion unit includes a guide rod fixedly connected to the outer wall of the air delivery frame, and a ball bearing is rotatably mounted at one end of the guide rod.

[0007] A heat dissipation unit is used to uniformly dissipate heat from the outer wall of the laser welding head. The heat dissipation unit includes a gas supply pipe fixedly installed on the gas supply frame, and a ball is slidably installed on the inner wall of the gas supply pipe.

[0008] Preferably, the corrugated telescopic ring is configured as a telescopic corrugated ring, and a rotating sleeve is rotatably installed on the outer wall of the corrugated telescopic ring and the outer wall of the laser welder body. An annular groove is formed on the outer wall of the rotating sleeve, and a plurality of evenly distributed abutting protrusions are fixedly connected to the inner wall of the annular groove. The abutting protrusions are configured as hemispherical protrusions, and the guide rod and the ball are slidably connected to the inner wall of the annular groove.

[0009] Preferably, the inner wall of the gas pipeline is provided with a stepped groove, the stepped groove is configured as a groove of the inner contour of a stepped platform, a second return spring is fixedly connected to the inner wall of the stepped groove, a second fixing plate is fixedly connected to one end of the second return spring, and the outer wall of the ball is fixedly connected to the second fixing plate.

[0010] Preferably, the corrugated expansion ring is rotatably sleeved on the outer wall of the rotating sleeve, and a high-pressure nitrogen pipe is fixedly installed on the corrugated expansion ring.

[0011] Preferably, a first fixing plate is fixedly connected to the outer wall of the air supply frame, a first return spring is fixed to the outer wall of the first fixing plate, the first return spring is sleeved on the air supply frame, and the other end of the first return spring is fixedly connected to the inner wall of the fixing frame.

[0012] Preferably, the inner wall of the gas supply frame is provided with a gas supply groove, and the bottom opening of the gas supply groove faces the laser welding head.

[0013] Preferably, a first electric slide rail is fixedly installed on the inner wall of the welding workbench body, a second electric slide rail is fixedly installed on the moving end of the first electric slide rail, a third electric slide rail is fixedly installed on the moving end of the second electric slide rail, a second support frame is fixedly installed on the moving end of the third electric slide rail, and the laser welder body is fixedly installed on the second support frame.

[0014] Preferably, a mounting bracket is fixedly installed on the second support frame, a drive motor is fixedly installed on the mounting bracket, a first drive gear is fixedly connected to the output end of the drive motor, a second drive gear is meshed with the outer wall of the first drive gear, and the second drive gear is fixedly connected to the outer wall of the rotating sleeve.

[0015] Preferably, a first support frame is rotatably mounted on the outer wall of the main body of the welding workbench, a control panel is fixedly mounted on the first support frame, and a control screen is fixedly mounted on the control panel.

[0016] Preferably, a protective plate for preventing splashing is fixedly installed on the main body of the welding workbench, a temperature sensor and an alarm are fixedly installed on the main body of the welding workbench, and a placement rack is fixedly installed on the main body of the welding workbench.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] In this invention, during the left-right swaying of the gas supply frame, since the inner contour of the trapezoidal groove is set as a frustum, as the ball moves deeper into the trapezoidal groove, the inner contour of the trapezoidal groove becomes larger as it goes deeper. At this time, the gas in the gas supply frame will be ejected through the gap between the ball and the trapezoidal groove towards the outer wall of the laser welding head. The ejected gas can carry away the high temperature accumulated on the outer wall of the laser welding head due to mirror reflection, thus cooling the laser welding head. Each time the gas supply frame sways to one side, only one side of the gas supply pipe will eject gas outward, preventing excessive gas from ejecting gas outward and thus weakening the downward gas ejection protection effect of the gas supply frame.

[0019] 2. In this invention, the gas supply frame is in a swaying state when blowing air. The swaying state of the gas supply frame can increase the range and angle of the air blowing from the bottom outlet. Furthermore, the gas supply frame is in a state where one side is close to the laser welding head and the other side is far away from the laser welding head, thereby providing a further protective gas coverage for the laser welding head and the welding area.

[0020] 3. In this invention, high-pressure nitrogen gas is delivered to the inner wall of the gas supply frame through a high-pressure nitrogen pipe, and diffuses through the arc surface of the inner wall of the gas supply frame, filling the entire gas supply groove. It is then blown towards the welding position of the laser welding head through the opening at the bottom of the gas supply groove, blowing away the sparks that fly during welding and providing anti-oxidation protection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0023] Figure 3 This is an enlarged schematic diagram of the fixed frame and its surrounding structure according to the present invention;

[0024] Figure 4 This is an enlarged cross-sectional view of the fixed frame and its surrounding structure according to the present invention;

[0025] Figure 5 This is a further enlarged cross-sectional view of the fixed frame and its surrounding structure of the present invention;

[0026] Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle;

[0027] Figure 7 This is a top view enlarged cross-sectional schematic diagram of the fixed frame and its surrounding structure according to the present invention.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Welding workbench body; 2. Control screen; 3. Control panel; 4. First support frame; 5. Protective plate; 6. Temperature sensor; 7. Alarm; 8. Placement rack; 9. First electric slide rail; 10. Second electric slide rail; 11. Third electric slide rail; 12. Second support frame; 14. Mounting frame; 15. Drive motor; 16. Laser welder body; 17. First drive gear; 18. Second drive gear; 19. Rotating sleeve; 20. Annular groove; 21. Abutting protrusion; 22. Corrugated telescopic ring; 23. High-pressure nitrogen pipe; 24. Gas supply frame; 25. Gas supply groove; 26. First fixing plate; 27. First return spring; 28. Laser welding head; 30. Guide rod; 31. Ball bearing; 32. Trapezoidal groove; 33. Ball bearing; 34. Second fixing plate; 35. Second return spring; 36. Fixing frame; 38. Gas supply pipe. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1 - Figure 7 A laser welding device for machining mechanical parts includes a welding worktable body 1, a laser welder body 16, a fixed frame 36 rotatably mounted outside the laser welder body 16, and a laser welding head 28 fixedly mounted at the output end of the laser welder body 16. A corrugated telescopic ring 22 is fixedly connected to the inner wall of the fixed frame 36, and a jetting unit for jetting gas toward the laser welding head 28 is fixedly mounted on the outer wall of the corrugated telescopic ring 22. The jetting unit includes a gas supply frame 24, which is fixedly connected to the outer wall of the corrugated telescopic ring 22. Nitrogen gas is delivered to the inner wall of the gas supply frame 24 through a high-pressure nitrogen pipe 23, and diffuses through the arc surface of the inner wall of the gas supply frame 24, filling the entire gas supply groove 25. The gas is then blown toward the welding position of the laser welding head 28 through the opening at the bottom of the gas supply groove 25, blowing away sparks that fly during welding and providing anti-oxidation protection.

[0032] Also includes:

[0033] A diffusion unit is used to increase the coverage of the jet unit. The diffusion unit includes a guide rod 30 fixedly connected to the outer wall of the air delivery frame 24, and a ball bearing 31 is rotatably mounted on one end of the guide rod 30.

[0034] The corrugated telescopic ring 22 is configured as a telescopic corrugated ring. The outer wall of the corrugated telescopic ring 22 is rotatably mounted with a rotating sleeve 19 on the outer wall of the laser welder body 16. The outer wall of the rotating sleeve 19 is provided with an annular groove 20. The inner wall of the annular groove 20 is fixedly connected with a plurality of evenly distributed abutting protrusions 21. The abutting protrusions 21 are configured as hemispherical protrusions. The guide rod 30 and the ball 31 are slidably connected to the inner wall of the annular groove 20. When the abutting protrusions 21 move in a circle, they will intermittently abut against the ball 31. The abutting causes the ball 31 to bend the guide rod 30 in a direction away from the abutting protrusions 21 and move. The guide rod 30 moves synchronously with the gas supply frame 24 at one end. The movement of the second fixing plate 34 causes the first fixing plate 26 with the outer wall to move synchronously. When the first fixing plate 26 moves, it bends part of the first return spring 27 to store force, and the gas supply frame 24 moves as a whole.

[0035] The corrugated expansion ring 22 is rotatably sleeved on the outer wall of the rotating sleeve 19, and a high-pressure nitrogen pipe 23 is fixedly installed on the corrugated expansion ring 22.

[0036] A first fixing plate 26 is fixedly connected to the outer wall of the gas supply frame 24. A first return spring 27 is fixed to the outer wall of the first fixing plate 26. The first return spring 27 is sleeved on the gas supply frame 24. The other end of the first return spring 27 is fixedly connected to the inner wall of the fixing frame 36.

[0037] The inner wall of the gas supply frame 24 is provided with a gas supply groove 25. The bottom opening of the gas supply groove 25 faces the laser welding head 28. Since there are multiple abutment protrusions 21, the gas supply frame 24 is in a swaying state when blowing air after the drive motor 15 is started. The swaying state of the gas supply frame 24 can increase the range and angle of the air blowing from the bottom outlet. Furthermore, the gas supply frame 24 is in a state where one side is close to the laser welding head 28 and the other side is away from the laser welding head 28, thereby providing a further protective gas coverage for the laser welding head 28 and the welding area.

[0038] The inner wall of the welding workbench body 1 is fixedly installed with a first electric slide rail 9, the moving end of the first electric slide rail 9 is fixedly installed with a second electric slide rail 10, the moving end of the second electric slide rail 10 is fixedly installed with a third electric slide rail 11, the moving end of the third electric slide rail 11 is fixedly installed with a second support frame 12, and the laser welder body 16 is fixedly installed on the second support frame 12.

[0039] A mounting bracket 14 is fixedly installed on the second support frame 12. A drive motor 15 is fixedly installed on the mounting bracket 14. A first drive gear 17 is fixedly connected to the output end of the drive motor 15. A second drive gear 18 is meshed with the outer wall of the first drive gear 17. The second drive gear 18 is fixedly connected to the outer wall of the rotating sleeve 19.

[0040] The outer wall of the main body 1 of the welding workbench is rotatably mounted with a first support frame 4, a control panel 3 is fixedly mounted on the first support frame 4, and a control screen 2 is fixedly mounted on the control panel 3.

[0041] A protective plate 5 for preventing splashing is fixedly installed on the main body 1 of the welding workbench. A temperature sensor 6 and an alarm 7 are fixedly installed on the main body 1 of the welding workbench. A placement rack 8 is fixedly installed on the main body 1 of the welding workbench.

[0042] Example 2: This example is an improvement upon Example 1. For details, please refer to [link / reference]. Figure 1 - Figure 7 The heat dissipation unit is used to uniformly dissipate heat from the outer wall of the laser welding head 28. The heat dissipation unit includes an air supply pipe 38 fixedly installed on the air supply frame 24, and a ball bearing 33 is slidably installed on the inner wall of the air supply pipe 38.

[0043] The inner wall of the gas supply pipe 38 is provided with a stepped groove 32, which is a groove of the inner contour of a stepped platform. A second return spring 35 is fixedly connected to the inner wall of the stepped groove 32. A second fixing plate 34 is fixedly connected to one end of the second return spring 35. The outer wall of the ball 33 is fixedly connected to the second fixing plate 34. During the left and right swinging of the gas supply frame 24, the gas supply frame 24 will move synchronously with the multiple gas supply pipes 38 on the outer wall. When the gas supply pipes 38 move, the ball 33 will contact the outer wall of the laser welding head 28. The contact will cause the ball 33 to be forced to move deeper into the stepped groove 32. When moving, the ball 33 moves with the second fixing plate 34, compressing the second return spring 35 and causing the second return spring 35 to store force. Since the inner contour of the trapezoidal groove 32 is set as the inner contour of a frustum, as the ball 33 moves deeper into the trapezoidal groove 32, the inner contour of the trapezoidal groove 32 becomes larger as it goes deeper. At this time, the gas in the gas supply frame 24 will be ejected through the gap between the ball 33 and the trapezoidal groove 32 toward the outer wall of the laser welding head 28. The ejected gas can carry away the high temperature accumulated on the outer wall of the laser welding head 28 due to mirror reflection, thus cooling the laser welding head 28.

[0044] Working principle: During the welding process, the nitrogen venting system can be activated. High-pressure nitrogen is delivered to the inner wall of the gas supply frame 24 through the high-pressure nitrogen pipe 23, and diffused through the arc surface of the inner wall of the gas supply frame 24, filling the entire gas supply groove 25. The gas is then blown towards the welding position of the laser welding head 28 through the opening at the bottom of the gas supply groove 25, blowing away the sparks that fly during welding and providing anti-oxidation protection.

[0045] By starting the drive motor 15, the drive motor 15 drives the first drive gear 17 at the output end to rotate. When the first drive gear 17 rotates, it meshes with the second drive gear 18, causing the second drive gear 18 to rotate synchronously. The second drive gear 18 drives the rotating sleeve 19 to rotate along the outer wall of the laser welder body 16. When the rotating sleeve 19 rotates, it drives multiple abutting protrusions 21 to move in a circular trajectory. When the abutting protrusions 21 move in a circular motion, they will intermittently abut against the ball 31. The abutting causes the ball 31 to bend the guide rod 30 in the direction away from the abutting protrusions 21 and move. The guide rod 30 drives the air supply frame 24 at one end to move synchronously. The movement of the second fixing plate 34 will drive the first fixing plate 26 on the outer wall to move synchronously. When the first fixing plate 26 moves, it bends part of the first return spring 27 to store force, and the air supply frame 24 moves as a whole.

[0046] When a single abutting protrusion 21 releases its contact with the ball 31, the first return spring 27, which is in a stored state, returns to its original state from its bent state, along with the air delivery frame 24. Since there are multiple abutting protrusions 21, after the drive motor 15 is started, the air delivery frame 24 is in a swaying state when blowing air. The swaying air delivery frame 24 can increase the range and angle of the air blowing from the bottom outlet. Furthermore, the air delivery frame 24 is in a state where one side is close to the laser welding head 28 and the other side is away from the laser welding head 28, thereby providing further protective gas coverage for the laser welding head 28 and the welding area.

[0047] During the left-right swaying process of the gas supply frame 24, the gas supply frame 24 will move synchronously with the multiple gas supply pipes 38 on the outer wall. When the gas supply pipes 38 move, the rolling ball 33 will contact the outer wall of the laser welding head 28. The contact will cause the rolling ball 33 to be forced to move deeper into the trapezoidal groove 32. When moving, the rolling ball 33 will move with the second fixing plate 34 to compress the second return spring 35 and cause the second return spring 35 to store force. Since the inner contour of the trapezoidal groove 32 is set as the inner contour of the truncated cone, as the rolling ball 33 moves deeper into the trapezoidal groove 32, the inner contour of the trapezoidal groove 32 becomes larger as it goes deeper. At this time, the gas in the gas supply frame 24 will be ejected through the gap between the rolling ball 33 and the trapezoidal groove 32 towards the outer wall of the laser welding head 28. The ejected gas can carry away the high temperature accumulated on the outer wall of the laser welding head 28 due to mirror reflection and cool down the laser welding head 28.

[0048] Furthermore, each time the air supply frame 24 swings to one side, only one side of the air supply pipe 38 will expel air outward, preventing excessive air from the air supply pipe 38 from expelling air outward and thus weakening the downward airflow protection effect of the air supply frame 24.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser welding device for machining of mechanical parts, characterized in that: The utility model relates to a laser welding device, including welding workbench main part (1), laser welder main part (16), the fixed frame (36) of rotation installation in laser welder main part (16) outside and the laser welding head (28) of fixed installation in laser welder main part (16) output end, the inner wall fixed connection of fixed frame (36) has bellows expansion ring (22), the outer wall fixed mounting of bellows expansion ring (22) is used for the gas injection unit for the gas injection to laser welding head (28), the gas injection unit includes gas frame (24), gas frame (24) fixed connection on the outer wall of bellows expansion ring (22), Also include: Diffusion unit, the diffusion unit is used for increasing the coverage of gas injection unit, the diffusion unit includes fixed connection on the outer wall of gas frame (24) guide rod (30), one end of guide rod (30) rotatory mounting has ball (31), The heat dissipation unit is used for the uniform heat dissipation of the outer wall of laser welding head (28), and the heat dissipation unit includes gas pipe (38) fixedly installed on the gas frame (24), and the inner wall of the gas pipe (38) is slidably installed with a rolling ball (33), The inner wall of the gas pipe (38) is provided with a ladder groove (32), the ladder groove (32) is provided as a groove with a ladder inner contour, the inner wall of the ladder groove (32) is fixedly connected with a second return spring (35), one end of the second return spring (35) is fixedly connected with a second fixed sheet (34), and the outer wall of the rolling ball (33) is fixedly connected with the second fixed sheet (34).

2. The laser welding device for machining of mechanical parts according to claim 1, characterized in that: The bellows expansion ring (22) is provided as a telescopic bellows ring, the outer wall of the bellows expansion ring (22) is rotatably installed with a rotating sleeve (19) on the outer wall of the laser welder main part (16), the outer wall of the rotating sleeve (19) is provided with an annular groove (20), the inner wall of the annular groove (20) is fixedly connected with a plurality of uniformly distributed abutting protrusions (21), the abutting protrusions (21) are provided as hemispherical protrusions, and the guide rod (30) and the ball (31) are slidably connected to the inner wall of the annular groove (20).

3. The laser welding device for machining of mechanical parts as claimed in claim 1, wherein: The bellows expansion ring (22) is rotatably sleeved on the outer wall of the rotating sleeve (19), and a high-pressure nitrogen gas pipe (23) is fixedly installed on the bellows expansion ring (22).

4. The laser welding device for machining of mechanical parts according to claim 1, characterized in that: The outer wall of the gas frame (24) is fixedly connected with a first fixed sheet (26), the outer wall of the first fixed sheet (26) is fixedly connected with a first return spring (27), the first return spring (27) is sleeved on the gas frame (24), and the other end of the first return spring (27) is fixedly connected with the inner wall of the fixed frame (36).

5. The laser welding device for machining of mechanical parts as claimed in claim 1, wherein: The inner wall of the gas frame (24) is provided with a gas groove (25), and the bottom opening of the gas groove (25) faces the laser welding head (28).

6. The laser welding device for machining of mechanical parts as claimed in claim 1, wherein: The inner wall of the welding workbench body (1) is fixedly installed with a first electric sliding rail (9), the moving end of the first electric sliding rail (9) is fixedly installed with a second electric sliding rail (10), the moving end of the second electric sliding rail (10) is fixedly installed with a third electric sliding rail (11), the moving end of the third electric sliding rail (11) is fixedly installed with a second support frame (12), and the laser welder body (16) is fixedly installed on the second support frame (12).

7. The laser welding device for machining of mechanical parts as claimed in claim 6, wherein: The second support frame (12) is fixedly installed with a mounting bracket (14), the mounting bracket (14) is fixedly installed with a transmission motor (15), the output end of the transmission motor (15) is fixedly connected with a first transmission gear (17), the outer wall of the first transmission gear (17) is meshedly connected with a second transmission gear (18), and the second transmission gear (18) is fixedly connected to the outer wall of a rotating sleeve (19).

8. The laser welding device for machining of mechanical parts as claimed in claim 1, wherein: The outer wall of the welding workbench body (1) is rotatably installed with a first support frame (4), the first support frame (4) is fixedly installed with a control panel (3), and the control panel (3) is fixedly installed with a control screen (2).

9. The laser welding device for machining of mechanical parts as claimed in claim 1, wherein: The welding workbench body (1) is fixedly installed with a protective plate (5) for preventing splashing, the welding workbench body (1) is fixedly installed with a temperature sensor (6) and an alarm (7), and the welding workbench body (1) is fixedly installed with a placing rack (8).

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