Laser welding gun and gun body

Abstract

This invention discloses a gun body and a laser welding gun, relating to the technical field of laser welding. The gun body has a laser channel through which a laser beam can pass, including a first channel and a second channel connected to the first channel. The gun body includes a gun head, a gun body, and a flow-diverting element. The first channel is located inside the gun body, and the second channel is located inside the gun head, which is connected to the gun body. The gun head has multiple heat dissipation chambers. The flow-diverting element is housed in the first channel and has a first hole extending through the first channel for the laser beam to pass through. The flow-diverting element also has multiple air guide paths, each connected to a heat dissipation chamber. Cooling gas entering the first channel is guided to the heat dissipation chambers via the air guide paths to dissipate heat from the gun body. Each heat dissipation chamber is connected to the second channel, allowing the cooling gas to flow out of the gun head via the second channel. This invention solves the technical problem that existing laser welding guns are inconvenient for operators to hold for extended periods.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and more particularly to a gun body and a laser welding gun. Background Technology

[0002] When welding small batches of irregular welds, handheld laser welding guns are required to weld the workpieces. Laser welding guns generally consist of a gun body. During the welding process, due to the high temperature of the gun body, existing laser welding guns generally use water cooling. However, water cooling makes the overall weight of the gun body large, not lightweight, and inconvenient for workers to hold and operate for a long time. Summary of the Invention

[0003] In view of this, the present invention provides a gun body and a laser welding gun to solve the technical problem that existing laser welding guns are inconvenient for workers to hold for a long time.

[0004] To solve the above-mentioned technical problems, the first technical solution adopted by the present invention is as follows:

[0005] A gun body, wherein the gun body is provided with a laser channel that allows a laser to pass through, the laser channel including a first channel and a second channel communicating with the first channel; the gun body includes a gun head, a gun body and a shunt element, the first channel is disposed in the gun body and the second channel is disposed in the gun head, the gun head is connected to the gun body and the gun head is provided with a plurality of heat dissipation chambers;

[0006] The diversion element is housed in the first channel. The diversion element has a first hole extending through it along the first channel, which allows the laser to pass through. The diversion element also has multiple air guides, each of which is connected to a heat dissipation chamber. Cooling gas entering the first channel is guided to each heat dissipation chamber via each air guide to dissipate heat from the gun body. Each heat dissipation chamber is connected to the second channel so that the cooling gas can flow out of the gun head via the second channel.

[0007] In some embodiments of the gun body, the airflow path of the airflow guide is arranged in a serpentine pattern along the extension direction of the first channel on the peripheral sidewall of the flow divider element.

[0008] In some embodiments of the gun body, the heat dissipation chamber includes a first air passage and a second air passage. The gun head is also provided with a connecting chamber, and the connecting chamber is provided with a plurality of third air passages. Each first air passage is connected to each of the guide air passages and each of the third air passages, so as to introduce the cooling gas from each of the heat dissipation chambers to each of the third air passages. Each of the third air passages is also connected to each of the second air passages, so as to introduce the cooling gas into each of the second air passages. Each of the second air passages is also connected to the second channel, so as to exhaust the cooling gas out of the heat dissipation chamber.

[0009] In some embodiments of the gun body, the gun body further includes a flow guide, which is housed in the second channel. The flow guide has a second hole extending through it along the extension direction of the second channel, and the second hole is used for the laser to pass through. The size of the flow guide wall on the outer side of the flow guide gradually decreases along the extension direction of the second channel. A flow guide gap is formed between the flow guide wall and the inner wall forming the second channel. The flow guide gap is used to guide the cooling gas flowing out from each of the heat dissipation chambers into the second channel.

[0010] In some embodiments of the gun body, a plurality of diversion plates are provided on the heat dissipation groove forming the second air passage. Each diversion plate is arranged along the extension direction of the second air passage to divert the cooling gas. Each diversion plate is located between the inlet and outlet of the second air passage.

[0011] In some embodiments of the gun body, the flow path of the cooling gas in the first gas path is arc-shaped.

[0012] In some embodiments of the gun body, there are two heat dissipation chambers, which are located on opposite sides of the gun head, and the connecting chamber is located between the two heat dissipation chambers.

[0013] In some embodiments of the gun body, an annular groove is formed on the peripheral sidewall of the diverting element along the circumference of the diverting element, the annular groove is connected to each of the guiding air passages, and the gun body is provided with an air port for connecting an external blowing mechanism, the air port being located at the position corresponding to the annular groove.

[0014] In some embodiments of the gun body, the extension direction of the first channel is set at an angle to the extension direction of the second channel, and the gun body further includes an optical component housed in the second channel, which enables the laser path to be changed from the extension direction of the first channel to the extension direction of the second channel.

[0015] To solve the above-mentioned technical problems, the second technical solution adopted by the present invention is as follows:

[0016] A laser welding gun includes the gun body described in the above embodiment.

[0017] Implementing the embodiments of the present invention will have the following beneficial effects:

[0018] The aforementioned gun body, applied to a laser welding torch, enables both the torch itself and the torch to achieve heat dissipation through air cooling. Specifically, the torch body is equipped with channels for cooling gas flow, allowing the cooling gas to flow sequentially from the outside through a flow divider, a heat dissipation chamber, and a second channel, forming a cooling path and achieving overall heat dissipation for the torch body. Furthermore, the flow divider also has a flow-diverting function, guiding the cooling gas through multiple air paths into multiple heat dissipation chambers, enabling the cooling gas to dissipate heat at multiple locations on the torch body, thus improving the heat dissipation effect. The torch body and laser welding torch of this invention adopt an air-cooled heat dissipation method, which, compared with the existing water-cooled heat dissipation method, is lighter and easier for operators to hold for extended periods, thereby solving the technical problem that existing laser welding torches are inconvenient for operators to hold for long periods. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a front view of the gun body in one embodiment;

[0021] Figure 2 for Figure 1 A partial structural diagram of the gun body is shown.

[0022] Figure 3 for Figure 1 A cross-sectional view of section AA in the middle;

[0023] Figure 4 for Figure 3 The diagram shows the structure of the current shunt element.

[0024] Figure 5 for Figure 4 A schematic diagram of the shunt element from another angle;

[0025] Figure 6 for Figure 3 The diagram shows the structure of the fixed-focus rod.

[0026] The components are as follows: 1. Gun head; 11. Mounting shell; 12. Focusing rod; 121. Flow guide outlet; 13. Welding head cylinder; 14. Second channel; 15. Heat dissipation chamber; 151. Second air passage; 1511. Flow divider plate; 1512. Heat dissipation outlet; 152. First air passage; 16. Connecting chamber; 161. Third air passage; 2. Gun body; 21. First channel; 22. Air port; 3. Flow divider element; 31. Annular groove; 32. Flow guide air passage; 33. Inlet; 34. Outlet; 35. First hole; 4. Mounting plate; 5. Optical element; 6. Flow guide; 61. Second hole; 62. Flow guide gap. Detailed Implementation

[0027] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many other different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0028] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] Existing laser welding guns generally use water cooling, but this makes the gun body heavy and not lightweight, making it inconvenient for workers to hold and operate it for a long time.

[0031] like Figure 1-6As shown, in one embodiment of the gun body, the gun body is provided with a laser channel that allows a laser to pass through. The laser channel includes a first channel 21 and a second channel 14 communicating with the first channel 21. The gun body includes a gun head 1, a gun body 2, and a diverting element 3. The first channel 21 is located inside the gun body 2, and the second channel 14 is located inside the gun head 1. The gun head 1 is connected to the gun body 2, and the gun head 1 is provided with multiple heat dissipation chambers 15. The diverting element 3 is housed in the first channel 21, and the diverting element 3 is provided with a first hole 35 extending through the first channel 21, which allows the laser to pass through. The diverting element 3 is also provided with multiple air guides 32, each of which is connected to a heat dissipation chamber 15. Cooling gas entering the first channel 21 is guided to each heat dissipation chamber 15 through each air guide 32 to dissipate heat from the gun body. Each heat dissipation chamber 15 is connected to the second channel 14 so that the cooling gas can flow out of the gun head 1 through the second channel 14.

[0032] In this embodiment, the cooling gas introduced into the first channel 21 by the air-blowing mechanism can be diverted by the diversion element 3 and introduced into each heat dissipation chamber 15, so that the cooling gas can dissipate heat to multiple parts of the gun body, improve the heat dissipation effect, and by adopting air cooling, compared with water cooling, the weight of the overall gun body is reduced, making it easier for the operator to hold and operate for a long time, thus solving the technical problem that existing laser welding guns are not convenient for operators to hold for a long time.

[0033] In one embodiment of the gun body, combined with Figure 4 and Figure 5 As shown, the flow path of the guide air passage 32 is arranged in a serpentine pattern along the extension direction of the first channel 21 on the peripheral sidewall of the flow splitting element 3.

[0034] In this embodiment, specifically, the diversion element 3 can be a cylindrical structure, and the groove structure forming the guide air passage 32 is arranged in a serpentine, i.e., S-shape along the circumference of the diversion element 3. When the diversion element 3 is a cylindrical structure, the number of guide air passages 32 is preferably set to two. The inlet 33 of the two guide air passages 32 are close to each other, forming S-shaped guide paths in the clockwise and counterclockwise directions along the circumference of the diversion element 3, respectively. This allows the cooling gas to be divided into two streams, which then enter the heat dissipation chamber 15 through the outlet 34 of the guide air passage 32. By setting the guide path of the guide air passage 32 in a serpentine form, the distance required for the cooling gas to pass through the diversion element 3 can be extended, thereby increasing the contact area between the cooling gas and the diversion element 3 and achieving a better heat dissipation effect.

[0035] It should be noted that the extension length of the serpentine groove forming the airflow path 32 after being divided into multiple single grooves can be unequal, that is, the extension length of each linear groove constituting the serpentine groove can be unequal.

[0036] In one embodiment of the gun body, combined with Figure 2 and Figure 3 As shown, the heat dissipation chamber 15 includes a first air passage 152 and a second air passage 151. The nozzle 1 is also provided with a connecting chamber 16, which contains a plurality of third air passages 161. Each first air passage 152 is connected to each guide air passage 32 and each third air passage 161 respectively, so that cooling gas can be introduced from each heat dissipation chamber 15 to each third air passage 161. Each third air passage 161 is also connected to each second air passage 151, so that cooling gas can be introduced into each second air passage 151. Each second air passage 151 is also connected to a second channel 14, so that cooling gas can be discharged from the heat dissipation chamber 15.

[0037] In this embodiment, by providing a first air passage 152 and a second air passage 151 in the heat dissipation chamber 15, the cooling gas entering the heat dissipation chamber 15 can be led out through the first air passage 152 to the third air passage 161, and then led back into the second air passage 151 of the heat dissipation chamber 15 through the third air passage 161. This allows the heat dissipation chamber 15 to be partially cooled first through the first air passage 152, and then the cooling gas is introduced into the third air passage 161 to dissipate heat at the tail end of the gun head 1 where the connecting chamber 16 is provided, and then introduced into other parts of the heat dissipation chamber 15 for heat dissipation. This extends the path of the cooling gas in the gun head 1, allowing the cooling gas to reach more parts of the gun head 1, thereby improving the heat dissipation efficiency and effect of the gun head 1.

[0038] Specifically, the third air passage 161 can be shaped like a "]" and flows from bottom to top, increasing the contact area with the tail end of the nozzle 1.

[0039] In one specific embodiment of the gun body, combined with Figure 1-3 As shown, the extension direction of the first channel 21 is set at an angle to the extension direction of the second channel 14. In this embodiment, it can be understood that the extension length of the gun body 2 matches the extension direction of the first channel 21. Similarly, the extension length of the gun head 1 also matches the extension direction of the second channel 14. When using the gun, the operator holds the gun body 2 so that the laser exit end of the gun head 1 is aligned with the position of the workpiece to be processed. Therefore, in order to facilitate the operator's use, the shape of the gun body is set as T-shaped, so that the extension direction of the first channel 21 and the extension direction of the second channel 14 form a certain angle. Preferably, the angle is greater than 90 degrees and less than 180 degrees, which is convenient for the operator to use.

[0040] In one embodiment of the gun body, combined with Figure 2As shown, the cooling gas is guided by the first air passage 152 to the tail end of the nozzle 1. The flow path of the first air passage 152 is arc-shaped, L-shaped, or similar. In the previous embodiment, the nozzle 1 and the nozzle body 2 are set at an angle, and the nozzle body 2 can be connected to the middle position of the nozzle 1. The head end of the nozzle 1 is farther away from the nozzle body 2 than the tail end. By setting the first air passage 152 to an arc shape, the cooling gas can be first guided into the third air passage 161 at the tail end, thereby dissipating heat and cooling the tail end of the nozzle 1.

[0041] In a specific embodiment of a gun body, combined with Figure 2 and Figure 3 As shown, there are two heat dissipation chambers 15, located on opposite sides of the nozzle head 1, with a connecting chamber 16 positioned between them. Specifically, the nozzle head 1 can be a rectangular shell structure, with the two heat dissipation chambers 15 located on opposite sides of the nozzle head 1 and the connecting chamber 16 positioned between the two heat dissipation chambers 15 on the tail end shell of the nozzle head 1. In this case, the inlet ends of the two first air passages 152 are connected to the outlet of the guide air passage 32 on the cylindrical structure.

[0042] Correspondingly, it is understandable that there are also two third air passages 161.

[0043] In one embodiment of the gun body, such as Figure 3 As shown, the gun body also includes a flow guide 6, which is housed in the second channel 14. The flow guide 6 has a second hole 61 extending through it along the extension direction of the second channel 14, allowing the laser to pass through. The size of the flow guide wall on the outer side of the flow guide 6 gradually decreases along the extension direction of the second channel 14, and a flow guide gap 62 is formed between the flow guide wall and the inner wall forming the second channel 14. The flow guide gap 62 is used to guide the cooling gas flowing out from each heat dissipation chamber 15 into the second channel 14.

[0044] In this embodiment, by providing the flow guide 6, it is possible to prevent multiple streams of cooling gas flowing out of the heat dissipation outlets 1512 of the multiple heat dissipation chambers 15 from forming a collision, thereby allowing the cooling gas to enter the second channel 14 more smoothly and then flow out through the laser outlet at the head end of the gun head 1.

[0045] Specifically, the cross-section of the guide member 6 can be circular, rectangular, or other shapes, with a circular shape being preferred.

[0046] In one embodiment of the gun body, combined with Figure 2 As shown, a plurality of diversion plates 1511 are provided on the heat dissipation groove forming the second air passage 151. Each diversion plate 1511 is arranged along the extension direction of the second air passage 151 so as to divert cooling gas. Each diversion plate 1511 is located between the inlet and outlet of the second air passage 151.

[0047] In this embodiment, the extension direction of the second air passage 151 may be parallel to the extension direction of the second channel 14, or form a certain angle with the extension direction of the second channel 14, with the angle being greater than 30 degrees. In the previous embodiment, the flow path of the guide air passage 32 was arranged in a serpentine manner, which could better dissipate heat from the gun body 2. In this embodiment, the second air passage 151 is divided into multiple branches, which can better diffuse to all parts of the heat dissipation chamber 15, increase the contact area with the gun head 1, and achieve a better heat dissipation effect.

[0048] It should be noted that in this invention, each air passage on the gun body can be formed by setting a groove, and then the air passage structure is formed by sealing it with a cover plate. For example, the guide air passage 32 can be formed by a serpentine reciprocating groove opened on the flow splitting element 3. The heat dissipation chamber 15 is also formed by opening a groove on the outer wall of the gun head 1, and then covering it with a cover plate, thereby forming the first air passage 152 and the second air passage 151, etc., which will not be described in detail.

[0049] In one embodiment of the gun body, such as Figure 4 and Figure 5 As shown, an annular groove 31 is provided on the side wall of the diverting element 3 along the circumference of the diverting element 3. The annular groove 31 is connected to each air guide passage 32. The gun body 2 is provided with an air port 22 for connecting an external blowing mechanism. The air port 22 is located at the corresponding position of the annular groove 31.

[0050] In this embodiment, an annular groove 31 is formed at the inlet of the flow diversion element 3 corresponding to the flow guide gas path 32. By setting the annular groove 31, external gas can be introduced into the flow guide gas path 32 through the annular groove 31. It should be noted that the side wall of the annular groove 31 away from the flow guide gas path 32 is sealed to the side wall of the first channel 21. The sealing method can be achieved by sealing rings or other sealing methods to prevent the cooling gas from flowing out from the laser inlet end of the gun body 2 away from the gun head 1.

[0051] In one embodiment of the gun body, combined with Figure 1-3 As shown, since the extension direction of the first channel 21 and the extension direction of the second channel 14 are set at an angle, in order to change the direction of the laser so that it can be changed from the extension direction of the first channel 21 to the extension direction of the second channel 14, the gun body of the present invention also includes an optical component. The optical component is housed in the second channel 14, and the laser path can be changed from the extension direction of the first channel 21 to the extension direction of the second channel 14 through the optical component. Specifically, the optical component is installed on the side wall of the gun head 1 away from the gun body 2, and can be mounted in the second channel 14 by fixing it with the mounting plate 4.

[0052] Understandably, the gun body also includes other optical elements 5, such as a collimating lens, which can be used to adjust the collimation of the laser to facilitate alignment with the workpiece's processing position.

[0053] Specifically, in the preceding embodiment, the gun head 1 has a rectangular shell structure. The optical components and collimating lens are fixedly mounted on the side wall between the two heat dissipation chambers 15. The gun head 1 includes a rectangular mounting shell 11, a focal length rod 12, and a welding head cylinder 13. The two heat dissipation chambers 15 are located on opposite sides of the mounting shell 11. The optical components and optical elements 5 are fixedly mounted on the mounting shell 11. The focal length rod 12 is fixedly connected to the end of the mounting shell 11 away from the end with the connecting chamber 16. The welding head cylinder 13 is fixedly connected to the end of the focal length rod 12 away from the mounting shell 11. All three have channels inside, which can be combined to form a second channel 14. The flow guide 6 is clamped and held by the focal length rod 12 and the mounting shell 11. The heat dissipation outlet 1512 of the second air passage 151 extends from the mounting shell 11 to the end face of the fixed focus rod 12, passes through the plate used to install the optical components and optical elements 5, and is then guided by the guide outlet 121 of the groove structure opened on the end face of the fixed focus rod 12 to the guide gap 62 between the fixed focus rod 12 and the guide member 6.

[0054] The present invention also relates to a laser welding torch, comprising the torch body as described in the above embodiment. The laser welding torch further comprises a laser generator, which is connected via a cable to the end of the torch body 2 away from the torch head 1.

[0055] By applying the gun body in the above embodiment, the laser welding gun in this embodiment can dissipate heat from the gun head 1 and the gun body 2 through air cooling. Due to the use of air cooling, the overall weight of the gun body is lighter than that of water cooling, making it easier for workers to hold and work for a long time.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A gun body, characterized in that, The gun body is provided with a laser channel that allows laser light to pass through. The laser channel includes a first channel and a second channel that communicates with the first channel. The gun body includes a gun head, a gun body, and a splitter element. The first channel is located inside the gun body, and the second channel is located inside the gun head. The gun head is connected to the gun body, and the gun head is provided with multiple heat dissipation chambers. The diversion element is housed in the first channel. The diversion element has a first hole extending through it along the first channel, which allows the laser to pass through. The diversion element also has multiple air guides, each of which is connected to a heat dissipation chamber. Cooling gas entering the first channel is guided to each heat dissipation chamber through the air guides to dissipate heat from the gun body. Each heat dissipation chamber is connected to the second channel so that the cooling gas can flow out of the gun head through the second channel. The heat dissipation chamber includes a first air passage and a second air passage. The tail of the gun head is also provided with a connecting chamber. The connecting chamber is provided with a plurality of third air passages. Each first air passage is connected to each of the guide air passages and each of the third air passages, so as to introduce the cooling gas from each of the heat dissipation chambers to each of the third air passages. Each of the third air passages is also connected to each of the second air passages, so as to introduce the cooling gas into each of the second air passages. Each of the second air passages is also connected to the second channel, so as to exhaust the cooling gas out of the heat dissipation chamber.

2. The gun body as described in claim 1, characterized in that, The flow path of the guiding air passage is arranged in a serpentine pattern along the extension direction of the first channel on the peripheral sidewall of the flow splitting element.

3. The gun body as described in claim 1, characterized in that, The gun body also includes a flow guide, which is housed in the second channel. The flow guide has a second hole extending through it along the extension direction of the second channel, and the second hole is used for the laser to pass through. The size of the flow guide wall on the outer side of the flow guide gradually decreases along the extension direction of the second channel. A flow guide gap is formed between the flow guide wall and the inner wall forming the second channel. The flow guide gap is used to guide the cooling gas flowing out from each of the heat dissipation chambers into the second channel.

4. The gun body as described in claim 1 or 3, characterized in that, The heat dissipation groove forming the second air passage is provided with multiple flow dividers. Each flow divider is arranged along the extension direction of the second air passage to divide the cooling gas. Each flow divider is located between the inlet and outlet of the second air passage.

5. The gun body as described in claim 1, characterized in that, The flow path of the cooling gas in the first gas path is arc-shaped.

6. The gun body as described in claim 1, characterized in that, The number of heat dissipation chambers is two, and the two heat dissipation chambers are located on opposite sides of the gun head, and the connecting chamber is located between the two heat dissipation chambers.

7. The gun body as described in claim 1, characterized in that, The flow divider element has an annular groove on its peripheral sidewall, which is connected to each of the air guide passages. The gun body is provided with an air port for connecting an external blowing mechanism, which is located at the position corresponding to the annular groove.

8. The gun body as described in claim 1, characterized in that, The extension direction of the first channel is set at an angle to the extension direction of the second channel. The gun body also includes an optical component, which is housed in the second channel and can change the path of the laser from the extension direction of the first channel to the extension direction of the second channel.

9. A laser welding gun, characterized in that, Includes the gun body as described in any one of claims 1-8.

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