A laser welding gun barrel with adjustable wire feeding angle and laser welding device

Abstract

This invention belongs to the field of laser welding technology and provides a laser welding gun barrel and laser welding device with adjustable wire feeding angle. The laser welding gun barrel, from top to bottom, includes an optical component connector, an adjusting tube, a telescopic tube, and a positioning adjustment nozzle. The telescopic tube includes a coaxially arranged and synchronously rotating graduated tube and a threaded tube. The optical component connector is threadedly connected to the upper end of the threaded tube. The adjusting tube is sleeved on the outside of the threaded tube. The positioning adjustment nozzle is threadedly installed at the lower end of the telescopic tube, and a fixing part for fixing the end of the wire feeding tube is provided on the side of the positioning adjustment nozzle. The positioning adjustment nozzle in this invention, by being threadedly installed on the lower side of the graduated tube, combined with the threaded engagement mechanism of the threaded tube and the adjusting tube, allows the lower positioning adjustment nozzle to be quickly fixed after circumferential rotation adjustment, making operation convenient and achieving rapid adjustment of the circumferential angle of the wire feeding tube.

Description

Technical Field

[0001] This utility model belongs to the field of laser welding technology, specifically relating to a laser welding gun barrel with adjustable wire feeding angle and a laser welding device. Background Technology

[0002] A laser welding system includes at least a laser emitter at the rear, a laser welding head at the front, and a wire feeding mechanism. If it is platform welding, the laser welding head is mounted on a multi-axis robot.

[0003] In existing technologies, the end of the wire feeding tube is usually fixed with a spring plate or other rigid component, and then the other end of the spring plate or other fixing component is fixed to the gun barrel with bolts. The tilt angle is adjusted to ensure that the wire feeding port aligns with the light outlet of the gun nozzle. For example, Chinese patent application number CN202420629366.4 discloses a structure for aligning the welding wire with the laser center in laser welding, including a laser welding head and a wire feeding tube and welding wire section that are inclined upwards. The laser welding head is equipped with a clamping assembly, the main body of which is a clamping sleeve. A fixed platform is fixedly installed on the top of the clamping sleeve, and a sliding platform is slidably fitted on the fixed platform. A wire feeding assembly is assembled on the top side of the sliding platform. A tube groove is opened in the wire feeding assembly, and a wire feeding tube is slidably fitted in the tube groove. The welding wire section is fitted in the wire feeding tube. An adjusting bolt communicating with the tube groove is opened on the top side of the wire feeding assembly, and the bottom end of the adjusting bolt is tightly attached to the top side of the wire feeding tube. This solution, through the wire feeding assembly in the top-side clamping assembly of the laser welding head, allows the wire feeding tube to be pressed tightly against the inner side of the tube groove in the wire feeding assembly by tightening the adjusting bolt, simultaneously adjusting the position of the welding wire section at the front end of the wire feeding tube, thereby adjusting its contact position with the laser at the front end of the laser welding head. However, this solution requires frequent tightening and loosening of the bolt when adjusting the angle of the wire feeding tube relative to the circumferential direction of the gun barrel, which is cumbersome. Therefore, to solve the above technical problems, this utility model provides a laser welding gun barrel and laser welding device with adjustable wire feeding angle positioning. Utility Model Content

[0004] The purpose of this invention is to overcome existing defects and provide a laser welding gun barrel and laser welding device with adjustable wire feeding angle.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] The primary objective of this invention is to provide a laser welding gun barrel with an adjustable wire feeding angle, comprising:

[0007] The telescopic tube includes a graduated tube and a threaded tube that are coaxially arranged and can rotate synchronously, with the graduated tube located at the lower end of the threaded tube;

[0008] An optical component connector is connected to the upper end of a threaded tube via a first internal thread.

[0009] The regulating tube is sleeved on the outside of the threaded tube, and has a second internal thread in the middle that mates with the threaded tube.

[0010] The positioning and adjusting nozzle is connected to the lower end of the scale tube by a thread, and a fixing part for fixing the wire feeding tube is provided on the side.

[0011] Preferably, the positioning and adjusting nozzle includes a wire feeding tube positioning component and a nozzle, and the fixing part is disposed on the side of the wire feeding tube positioning component.

[0012] Preferably, the upper end of the wire feeding tube positioning component is connected to the lower end of the scale tube via a second threaded connecting tube and a third internal thread, and the nozzle is threadedly installed at the lower end of the wire feeding tube positioning component.

[0013] Preferably, the upper end of the nozzle is integrally provided with a central sleeve, the upper end of the central sleeve is connected to the lower end of the scale tube via a first threaded connecting tube and a third internal thread, and the wire feeding tube positioning component is movably sleeved on the outside of the central sleeve.

[0014] Preferably, the upper side of the scale tube has multiple circumferentially spaced threaded through holes, and limit bolts are installed in the threaded through holes. The lower side of the threaded tube has multiple limit grooves that mate with the inner ends of the limit bolts.

[0015] Preferably, the fixing part is a fixing plate with a strip-shaped hole in the middle, and no more than three wire feeding tube sleeves are installed on the side of the fixing plate by bolts, with the wire feeding tubes passing through the middle of the wire feeding tube sleeves.

[0016] Preferably, the fixing part has a fixing hole or a fixing groove with a side opening in the middle, and the wire feeding tube passes through the fixing hole or fixing groove.

[0017] Preferably, the outer side of the optical component connector is fixedly connected to one end of the auxiliary positioning component, and the other end of the auxiliary positioning component is fixedly connected to the wire feeding tube.

[0018] Another objective of this invention is to provide a laser welding device, comprising an optical component, a laser generator, and a laser welding gun barrel as provided in the first objective of this invention. The laser generator is connected to one end of the optical component, and the optical component connector of the laser welding gun barrel is connected to the other end of the optical component.

[0019] Based on the above technical solutions, the beneficial effects of this utility model compared with the prior art are as follows:

[0020] The positioning and adjusting nozzle of this invention is threaded onto the lower side of the scale tube. Combined with the threaded engagement mechanism between the threaded tube and the adjusting tube, the lower positioning and adjusting nozzle can be quickly fixed after circumferential rotation adjustment, making operation convenient and enabling rapid adjustment of the circumferential angle of the wire feed tube. When it is necessary to change the circumferential angle of the wire feed tube relative to the gun barrel, simply loosen the connection between the positioning and adjusting nozzle and the telescopic tube, and directly rotate to accurately position it to the target angle. This eliminates the need for repeatedly tightening and loosening traditional bolt fixing structures, solving the inefficiency problem caused by frequent bolt operations in existing technologies and significantly improving the convenience and accuracy of wire feed tube angle adjustment. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the laser welding gun barrel with adjustable wire feeding angle provided in Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the optical component connector provided in Embodiment 1 of this utility model;

[0024] Figure 3 This is a schematic diagram of the regulating tube provided in Embodiment 1 of this utility model;

[0025] Figure 4 This is a schematic diagram of the telescopic tube provided in Embodiment 1 of this utility model;

[0026] Figure 5 This is a cross-sectional structural diagram of the telescopic tube provided in Embodiment 1 of this utility model;

[0027] Figure 6 This is a schematic diagram of the wire feeding tube positioning component and the nozzle provided in Embodiment 1 of this utility model;

[0028] Figure 7 This is a schematic diagram of the wire feeding tube positioning component and the nozzle provided in Embodiment 2 of this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the laser welding gun barrel with adjustable wire feeding angle provided in Embodiment 3 of this utility model;

[0030] Figure 9 This is a schematic diagram of the structure of the laser welding gun barrel with adjustable wire feeding angle provided in Embodiment 4 of this utility model;

[0031] In the diagram: 1. Optical component connector; 101. Connector; 102. Connecting tube; 103. First internal thread; 2. Adjusting tube; 201. Second internal thread; 3. Telescopic tube; 301. Threaded tube; 3011. Limiting groove; 302. Scale tube; 3021. Threaded through hole; 303. Third internal thread; 4. Nozzle; 401. First threaded connecting tube; 402. Center sleeve; 5. Wire feed tube positioning component; 501. Second threaded connecting tube; 6. Auxiliary positioning component; 7. Wire feed tube; 8. Positioning and adjusting nozzle; 9. Fixing part; 901. Fixing plate; 902. Wire feed tube sleeve. Detailed Implementation

[0032] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0033] Example 1:

[0034] like Figure 1 The image shows an embodiment of the laser welding gun tube with adjustable wire feeding angle provided by this utility model. From top to bottom, it comprises an optical component connector 1, an adjusting tube 2, a telescopic tube 3, and a positioning and adjusting nozzle. The positioning and adjusting nozzle is composed of a wire feeding tube positioning component 5 and a nozzle 4, and is used for circumferential angle adjustment and positioning of the wire feeding tube.

[0035] The laser welding gun barrel has an optical path through hole in the middle and an optical component connected to the upper end. The laser emitted by the laser emitter is collimated, reflected and focused by the optical component and then emitted from the lower end of the laser welding gun barrel.

[0036] like Figure 2 As shown, the optical component connector 1 has two integrally formed parts, an upper part being a connector 101 and a lower part being a connecting tube 102. A first internal thread 103 is provided in the middle hole of the connecting tube 102. The optical component connector 1 is connected to an external laser emitter through the upper connector 101.

[0037] like Figure 3 As shown, the top of the intermediate hole of the regulating pipe 2 is provided with a second internal thread 201; the intermediate hole of the connecting pipe 102 and the regulating pipe 2 are coaxially arranged and have the same size, and the first internal thread 103 and the second internal thread 201 also have the same size.

[0038] The telescopic tube 3 in this embodiment of the present invention includes a scale tube 302 and a threaded tube 301 that are coaxially arranged and can rotate synchronously. The scale tube 302 is disposed at the lower end of the threaded tube 301. The upper end of the threaded tube 301 is connected to the connecting tube 102 by a thread. The adjusting tube 2 is sleeved on the outside of the threaded tube 301. The outer thread of the threaded tube 301 is threadedly engaged with the first internal thread 103 and the second internal thread 201. The upper end face of the adjusting tube 2 is in contact with the lower end face of the optical component connector 1.

[0039] Preferably, the threaded tube 301 and the graduated tube 302 are detachably connected, which facilitates replacement when the threaded tube 301 wears out. Figure 4 and Figure 5 As shown, the upper side of the scale tube 302 has multiple circumferentially spaced threaded through holes 3021, and limit bolts are installed in the threaded through holes 3021. The lower side of the threaded tube 301 has multiple limit grooves 3011 that mate with the inner end of the limit bolts.

[0040] This invention effectively prevents relative rotation between the threaded tube 301 and the graduated tube 302 during rotation or under stress by using a limiting bolt and a limiting groove 3011, ensuring the stability of the overall structure. When replacing the threaded tube, the two parts can be quickly separated simply by loosening the limiting bolt, without the need for complicated tools or procedures, making disassembly and assembly convenient.

[0041] like Figure 6 As shown, the upper end of the wire feeding tube positioning component 5 is provided with a second threaded connecting tube 501 that mates with the third internal thread 303 at the lower end of the scale tube 302. The lower end of the wire feeding tube positioning component 5 is connected to the upper end of the nozzle 4 via a thread, and a fixing part 9 for fixing the end of the wire feeding tube 7 is provided on the side.

[0042] In this utility model, the wire feeding tube positioning component 5 can fix the wire feeding tube 7 through the fixing part 9, and the angle of the wire feeding tube 7 can be easily adjusted by the movable connection with the scale tube 302 and the nozzle 4.

[0043] As a preferred option, such as Figure 1 and Figure 6 As shown, the fixing part 9 is a fixing plate 901 with a strip-shaped hole in the middle. The fixing plate 901 has three or fewer wire feeding tube sleeves 902 installed on its side by bolts. The wire feeding tube 7 passes through the middle of the wire feeding tube sleeve 902.

[0044] The number of wire feeding tube sleeves 902 in this utility model can be selected and adjusted according to multiple wire feeding needs, which is highly flexible. The wire feeding tube sleeves 902 can be stably fixed by the fixing plate 901.

[0045] When adjusting the circumferential angle of the wire feed tube 7 relative to the gun barrel, this invention first loosens the wire feed tube positioning component 5 of the positioning and adjusting nozzle 8, and rotates the wire feed tube positioning component 5 to rotate the wire feed tube 7 relative to the gun barrel to a suitable angle. Then, keeping the wire feed tube positioning component 5 fixed, the telescopic tube 3 is loosened, and the scale tube 302 is tightened again with the wire feed tube positioning component 5 under the threaded engagement of the threaded tube 301 and the first internal thread 103. Finally, the adjusting tube 2 is rotated upward along the threaded tube 301, so that the upper end face of the adjusting tube 2 is pressed against the lower end face of the optical component connector 1 again, completing the angle adjustment.

[0046] It should be noted that the telescopic length of the telescopic tube 3 relative to the optical component connector 1 will affect the distance between the barrel and the workpiece. This problem can be solved by adjusting the settings of the six-axis robot that drives the barrel to move. The effect of the change in the telescopic length of the telescopic tube 3 on the light spot is negligible (the light beam after focusing is conical. The telescopic tube 3 is often used for oscillating laser welding, but in this application, when the telescopic tube 3 is turned, one revolution is only the length of one pitch, which does not exceed 1.5mm and can be ignored).

[0047] Example 2:

[0048] like Figure 7 As shown, this embodiment is based on embodiment 1, only the assembly method of the nozzle 4 of the positioning and adjusting nozzle 8 and the wire feeding tube positioning component 5 is adjusted. In this embodiment, the upper end of the nozzle 4 is integrally provided with a central sleeve 402, and the wire feeding tube positioning component 5 is movably sleeved on the outside of the central sleeve 402. The upper end of the central sleeve 402 is connected to the lower end of the scale tube 302 through the first threaded connecting tube 401 and the third internal thread 303.

[0049] In this embodiment, the wire feeding tube positioning component 5 is directly and movably sleeved on the outside of the central sleeve 402 of the nozzle 4. When it is necessary to adjust the wire feeding angle, it is not necessary to change the telescopic length of the telescopic tube 3. Simply loosen the nozzle 4, then rotate the wire feeding tube positioning component 5 to the target angle, and finally tighten the nozzle 4.

[0050] Example 3:

[0051] Based on Embodiment 1, this embodiment adjusts the structure of the positioning and adjusting nozzle 8 and the fixing part 9. In this embodiment, the positioning and adjusting nozzle 8 adopts an integrated structure design, and the fixing part 9 has a fixing hole or a fixing groove with a side opening in the middle, through which the wire feeding tube 7 passes.

[0052] like Figure 8 As shown, only the structure of the fixing hole is illustrated. In this embodiment, the wire feeding tube 7 is fixed by means of slotting or hole. The end of the wire feeding tube 7 can directly pass through the fixing hole or fixing slot, and then be fixed by bolts on the side.

[0053] Example 4:

[0054] like Figure 9 As shown, this embodiment adds an auxiliary positioning component 6 based on embodiment 1. One end of the auxiliary positioning component 6 is fixedly installed on the outside of the optical component connector 1, and the other end is fixedly connected to the wire feeding tube 7.

[0055] In this embodiment, the auxiliary positioning component 6 can provide a fulcrum for the wire feeding tube 7, improving its stability. It should be noted that when adjusting the wire feeding angle, the wire feeding tube 7 must first be separated from the auxiliary positioning component 6 before proceeding with the adjustment.

[0056] Example 5:

[0057] This embodiment provides a laser welding device, including an optical component, a laser generator, and a laser welding gun barrel provided in any one of embodiments 1 to 4. The laser generator is connected to one end of the optical component, and the optical component connector of the laser welding gun barrel is connected to the other end of the optical component. The laser enters the optical component and the laser welding gun barrel sequentially through the laser generator, and finally exits from the positioning and adjusting nozzle.

[0058] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0059] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A laser welding gun barrel with adjustable wire feeding angle, characterized in that, Including: The telescopic tube (3) includes a scale tube (302) and a threaded tube (301) that are coaxially arranged and can rotate synchronously, with the scale tube (302) located at the lower end of the threaded tube (301); The optical component connector (1) is connected to the upper end of the threaded tube (301) via the first internal thread (103); The regulating tube (2) is sleeved on the outside of the threaded tube (301), and a second internal thread (201) that mates with the threaded tube (301) is opened in the middle; The positioning and adjusting nozzle (8) is connected to the lower end of the scale tube (302) by a thread, and a fixing part (9) for fixing the wire feeding tube (7) is provided on the side.

2. The laser welding gun barrel with adjustable wire feeding angle according to claim 1, characterized in that, The positioning and adjusting nozzle (8) includes a wire feeding tube positioning component (5) and a nozzle (4), and the fixing part (9) is disposed on the side of the wire feeding tube positioning component (5).

3. The laser welding gun barrel with adjustable wire feeding angle according to claim 2, characterized in that, The upper end of the wire feeding tube positioning component (5) is connected to the lower end of the scale tube (302) via the second threaded connecting tube (501) and the third internal thread (303). The nozzle (4) is installed at the lower end of the wire feeding tube positioning component (5) via a thread.

4. The laser welding gun barrel with adjustable wire feeding angle according to claim 2, characterized in that, The nozzle (4) is integrally provided with a central sleeve (402) at the upper end. The upper end of the central sleeve (402) is connected to the third internal thread (303) at the lower end of the scale tube (302) through the first threaded connecting tube (401). The wire feeding tube positioning component (5) is movably sleeved on the outside of the central sleeve (402).

5. The laser welding gun barrel with adjustable wire feeding angle according to claim 1, characterized in that, The upper side of the scale tube (302) is provided with a plurality of circumferentially spaced threaded through holes (3021), and a limit bolt is installed in the threaded through holes (3021). The lower side of the threaded tube (301) is provided with a plurality of limit grooves (3011) that cooperate with the inner end of the limit bolt.

6. The laser welding gun barrel with adjustable wire feeding angle according to claim 1, characterized in that, The fixing part (9) is a fixing plate (901) with a strip hole in the middle. The fixing plate (901) has three or fewer wire feeding tube sleeves (902) installed on its side by bolts. The wire feeding tube (7) passes through the middle of the wire feeding tube sleeve (902).

7. The laser welding gun barrel with adjustable wire feeding angle according to claim 1, characterized in that, The fixing part (9) has a fixing hole or a fixing groove with a side opening in the middle, and the wire feeding tube (7) passes through the fixing hole or fixing groove.

8. The laser welding gun barrel with adjustable wire feeding angle according to claim 1, characterized in that, The outer side of the optical component connector (1) is fixedly connected to one end of the auxiliary positioning component (6), and the other end of the auxiliary positioning component (6) is fixedly connected to the wire feeding tube (7).

9. A laser welding apparatus, comprising an optical component and a laser generator, wherein the laser generator is connected to one end of the optical component, characterized in that, It also includes a laser welding gun barrel as described in any one of claims 1-8, wherein the optical component connector (1) of the laser welding gun barrel is connected to the other end of the optical component.

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