Integrated handheld laser welding gun

Abstract

The utility model relates to an integrated handheld laser welding gun which comprises an integrated welding gun body, a light path channel and a gas path channel, the light path channel and the gas path channel are arranged in the laser propagation direction, the light path channel is used for laser propagation, and the gas path channel is used for introducing cooling gas. And the integrated welding gun main body and the components arranged in the integrated welding gun main body are cooled through flowing cooling gas. An inlet of the gas path channel communicates with a cooling gas source, cooling gas can sequentially cool components arranged in the integrated welding gun body in the process of flowing along the gas path channel, a backflow pipeline does not need to be arranged in an air cooling mode, the size and the weight of the welding gun are reduced, handheld welding is facilitated, and the operation flexibility is improved; and the working intensity of an operator is reduced. And moreover, the cooling gas finally flows to the welding nozzle of the welding gun, and the cooling gas continuously plays a role in protecting the welding seam as shielding gas.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to an integrated handheld laser welding gun. Background Art

[0002] Laser welding is an efficient and precise welding method that uses a high energy density laser beam as a heat source. Laser welding is one of the important aspects of the application of laser material processing technology.

[0003] Laser welding guns are an important part of new laser welding equipment. They are flexible and convenient, and can perform welding in places that are difficult for large machinery or robots to reach. They have unique advantages and have therefore attracted much attention. However, due to the high heat generated by the laser, the laser output head needs to be cooled during use.

[0004] Most of the existing laser welding guns are water-cooled welding guns, which are designed with water-cooled lasers and water-cooled welding heads. This not only increases the size and weight of the welding gun, but also requires more connected pipes, making it inconvenient to hold welding. The welding gun is heavy, and the operator is tired after working for a long time. Water cooling also requires a circulating water tank, making the welding machine inconvenient to move as a whole, and limiting the use environment of the welding gun. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides an integrated handheld laser welding gun.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the integrated handheld laser welding gun of the utility model comprises an integrated welding gun body and an optical path channel and an air path channel arranged along the propagation direction of the laser;

[0009] The inlet of the gas path is communicated with a cooling gas source, and the cooling gas can sequentially cool the components arranged in the integrated welding gun body during the flow of the cooling gas along the gas path.

[0010] Optionally, a collimating mirror assembly, a galvanometer mirror assembly, a focusing mirror assembly and a protective mirror assembly are sequentially arranged in the optical path along the propagation direction of the laser.

[0011] Optionally, the collimator lens assembly comprises a collimator lens barrel and a collimator lens group;

[0012] The collimating lens barrel is arranged between the collimating lens group and the laser output head, the collimating lens barrel is threadedly connected to the integrated welding gun body, and the first end of the collimating lens barrel is abutted against the collimating lens group through a first gasket;

[0013] Optionally, the laser output head is threadedly connected to the second end of the collimating lens barrel.

[0014] Optionally, the gas path channel is provided on the integrated welding gun body, an outlet of the gas path channel is communicated with the optical path channel, and the outlet of the gas path channel is located outside the protective mirror assembly.

[0015] Optionally, the protective mirror assembly comprises a protective mirror drawer and a protective mirror group, and the protective mirror group is arranged in the protective mirror drawer;

[0016] The integrated welding gun body is provided with a mounting groove connected to the optical path channel, and the protective mirror drawer is detachably arranged in the mounting groove.

[0017] Optionally, two end surfaces of the protective lens assembly are both abutted against a second gasket.

[0018] Optionally, a heat-conducting component is provided on the outer peripheral surface of the protective mirror drawer, and the heat-conducting component is located in the air path channel.

[0019] Optionally, the protective mirror assembly also has a temperature detection unit, a through hole is opened on the integrated welding gun body at a position corresponding to the protective mirror drawer, the temperature detection unit is arranged in the through hole, and the temperature detection unit can detect the temperature of the heat conductive assembly in real time.

[0020] Optionally, the integrated handheld laser welding gun further comprises a welding gun housing, and one or more of a light output switch, a wire extraction switch, and an indicator light are provided on the welding gun housing.

[0021] (III) Beneficial effects

[0022] The inlet of the gas channel is connected to the cooling gas source. The cooling gas can cool the components arranged in the integrated welding gun body in sequence while flowing along the gas channel. The air cooling method does not require the setting of a return pipeline, which reduces the volume and weight of the welding gun, facilitates handheld welding, improves the flexibility of operation, and reduces the work intensity of the operator. In addition, the cooling gas eventually flows to the welding nozzle of the welding gun, and the cooling gas continues to protect the weld as a shielding gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an integrated welding gun body of an integrated handheld laser welding gun of the utility model;

[0024] Figure 2 It is a partial cross-sectional view of an integrated welding gun body of the integrated handheld laser welding gun of the utility model;

[0025] Figure 3 It is a cross-sectional view of the gas path of the integrated handheld laser welding gun of the utility model;

[0026] Figure 4 It is a schematic diagram of the installation of the protective lens assembly of the integrated handheld laser welding gun of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the integrated handheld laser welding gun of the utility model.

[0028] [Description of Reference Numerals]

[0029] 1: Laser output head; 11: Collimating lens barrel; 12: First gasket; 13: Collimating lens assembly; 14: Gasket; 15: Locking cap;

[0030] 2: One-piece welding gun body;

[0031] 3: Connector;

[0032] 4: Light output switch;

[0033] 5: galvanometer motor;

[0034] 6: temperature detection unit; 61: temperature probe;

[0035] 7: Focusing mirror assembly;

[0036] 8: protective mirror assembly; 81: protective mirror drawer; 82: protective mirror group; 83: pan seal; 84: pressure ring; 85: Teflon gasket; 86: thermal conductive assembly;

[0037] 9: Wire feeding switch;

[0038] 100. Welding gun housing. DETAILED DESCRIPTION

[0039] In order to better explain the utility model and facilitate understanding, the utility model is described in detail below with reference to the accompanying drawings and through specific implementation methods. Figure 1 The orientation is used as a reference.

[0040] Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0041] like Figure 1-5As shown, the utility model provides an integrated handheld laser welding gun, which includes an integrated welding gun body 2 and an optical path channel and an air path channel arranged along the propagation direction of the laser. The optical path channel is used for the propagation of the laser, and the air path channel is used for passing cooling gas. The integrated welding gun body 2 and the components arranged inside the integrated welding gun body 2 are cooled by the flowing cooling gas. Among them, the inlet of the air path channel is connected to the cooling gas source, and the cooling gas can cool the components arranged in the integrated welding gun body 2 in sequence during the flow of the cooling gas along the air path channel. The air cooling method does not require the setting of a return pipeline, which reduces the volume and weight of the welding gun, facilitates handheld welding, improves the flexibility of operation, and reduces the work intensity of the operator. In addition, the cooling gas eventually flows to the welding nozzle of the welding gun, and the cooling gas continues to play a role in protecting the weld as a shielding gas.

[0042] Furthermore, a collimator lens group 13, a galvanometer assembly, a focusing lens assembly 7 and a protective lens assembly 8 are sequentially arranged in the optical path channel along the propagation direction of the laser. After the laser passes through the collimator lens group 13, the divergent optical path changes, and the collimator lens group 13 outputs parallel light, which hits the reflector group driven by the galvanometer motor 5 in the galvanometer assembly, and the laser is reflected on the focusing lens group of the focusing lens assembly 7. After the laser is focused, it is focused to the focal position. A protective lens assembly 8 is arranged between the focusing lens group and the focal point to prevent external dust from contaminating the focusing lens assembly 7.

[0043] like Figure 1 As shown, the integrated welding gun body 2 includes a gun body and a handle connected to each other at a certain angle, which is convenient for holding and welding operations, and the collimating lens group 13 is arranged in the handle. Preferably, the integrated welding gun body 2 is integrally formed, which can effectively avoid the influence of the assembly accuracy on the welding gun optical path and gas path, avoid the risk of non-lighting and gas leakage due to deviation of the assembly angle, and also improve the sealing of the overall welding gun.

[0044] like Figure 2As shown, the collimator lens group 13 includes a collimator lens barrel 11 and a collimator lens group 13. The collimator lens barrel 11 is sleeved at the incident end of the optical path channel, and the collimator lens barrel 11 is located between the collimator lens group 13 and the laser output head 1, and the collimator lens barrel 11 is threadedly connected to the integrated welding gun body 2. The first side surface of the collimator lens group 13 abuts against the annular stopper in the optical path channel, and the upper end of the collimator lens barrel 11 abuts against the second side surface of the collimator lens group 13 through the first gasket 12. The collimator lens group 13 has a certain amount of deformation when it is deformed by heat, and the first gasket 12 can effectively prevent the risk of the collimator lens group 13 from breaking due to the hard limit of the collimator lens barrel 11 when it is deformed by heat. In other embodiments, a gasket 14 is also provided between the first side surface of the collimator lens group 13 and the annular stopper of the inner wall of the optical path channel to flexibly limit the collimator lens group 13. Specifically, a locking cap 15 is arranged in the optical path channel, the locking cap 15 is provided with an internal thread, the upper part of the collimating lens barrel 11 is provided with an external thread, the upper end of the collimating lens barrel 11 is sequentially installed with a first gasket 12, a collimating lens group 13 and a gasket 14, and then the locking cap 15 is pressed in, and the locking cap 15 and the collimating lens barrel 11 are connected by threaded cooperation, thereby tightening the first gasket 12, the collimating lens group 13 and the gasket 14.

[0045] See also Figure 2 , the laser output head 1 is threadedly connected to the lower end of the collimating lens barrel 11. Specifically, an internal thread is provided at the end of the laser output head 1, and an external thread is provided at the second end of the collimating lens barrel 11. The collimating lens barrel 11 and the laser output head 1 are threadedly screwed together. This avoids the situation in which the existing QBH (Quartz Block Head, laser output head 1) is easily installed improperly and causes focus deviation, and ensures that the light output direction, the collimating lens group 13 and the optical path channel in the handle of the integrated welding gun body 2 are coaxial, thereby ensuring the stability of the laser and making the welding effect more stable. In addition, a sloping top structure is provided on the top of the laser output head 1, and a plurality of circular holes are provided at intervals of set angles. A threaded hole corresponding to the circular hole is provided on the integrated welding gun body 2, and the integrated welding gun body 2 and the laser output head 1 can be fixed with a top screw.

[0046] like Figure 3 As shown, the gas path is provided on the integrated welding gun body 2, and the cooling gas of the cooling gas source enters the gas path through the joint 3, and the integrated welding gun body 2 is cooled along the gas path, thereby cooling the laser output head 1, the galvanometer assembly, and the focusing lens assembly 7 in sequence, and the outlet of the gas path is connected to the optical path through the opening inside the gas path, and the outlet of the gas path is located outside the protective lens assembly 8. After passing through the opening inside the gas path, the gas flows to the protective lens group 82, and under the obstruction of the outer side of the protective lens group 82, the gas passes through the gas guide ring and flows to the welding nozzle of the welding gun, and the cooling gas continues to protect the weld as a protective gas.

[0047] like Figure 4 As shown, the protective mirror assembly 8 includes a protective mirror drawer 81 and a protective mirror group 82. An annular groove for installing the protective mirror group 82 is provided in the protective mirror drawer 81, and the protective mirror group 82 is installed in the annular groove. An installation groove connected to the optical path is provided on the integrated welding gun body 2. The protective mirror drawer 81 is detachably arranged in the installation groove, and the protective mirror group 82 is easy to disassemble and assemble. The protective mirror drawer 81 is sealed and connected to the installation groove to prevent dust from entering the optical path through the installation groove.

[0048] See also Figure 4 , the two end faces of the protective lens group 82 are both in contact with the second gasket. Specifically, the left part of the protective lens group 82 is provided with a pan seal 83 to ensure that dust outside the welding gun cannot enter the right side of the protective lens group 82, which plays a sealing role. The right end of the protective lens group 82 is provided with a pressing ring 84, and the pressing ring 84 is provided with a groove for matching the Teflon gasket 85. The Teflon gasket 85 is fixed on the pressing ring 84 and then pressed on the protective lens group 82 to fix the protective lens group 82.

[0049] See also Figure 4 The outer surface of the protective mirror drawer 81 is provided with a heat-conducting component 86, preferably a heat-conducting copper sheet, with screw holes on the heat-conducting component 86, and screw holes on the bottom of the protective mirror drawer 81. The heat-conducting component 86 is closely attached to the protective mirror drawer 81, and the two are connected by screws. The heat of the entire protective mirror group 82 is transferred to the heat-conducting component 86. The heat-conducting component 86 is located in the air path channel, and the protective mirror group 82 is cooled by cooling air.

[0050] Furthermore, the protective mirror assembly 8 also has a temperature detection unit 6. A through hole is provided on the integrated welding gun body 2 at a position corresponding to the protective mirror drawer 81. The temperature detection unit 6 is arranged in the through hole. The temperature detection unit 6 can detect the temperature of the heat-conducting component 86 in real time. Specifically, the temperature detection unit 6 is located at the lower end of the protective mirror assembly 82. The temperature detection unit 6 is fixed to the welding gun body by screws. The temperature detection unit 6 contains a temperature probe 61. After the temperature detection unit 6 is installed and fixed, the temperature probe 61 is close to the heat-conducting component 86. The temperature change of the protective mirror assembly 82 is directly reflected on the temperature probe 61, and the detection is more sensitive. The temperature detection unit 6 is connected to the controller. When the protective mirror assembly 82 is dirty, has a burnt spot, or the galvanometer deflects and hits the side wall, the temperature change is transmitted to the controller in time, an alarm signal is generated, and the welding gun is controlled to cut off the light, so as to avoid the welding gun being burned due to the high temperature of the protective mirror assembly 82.

[0051] like Figure 5As shown, the integrated handheld laser welding gun also includes a welding gun housing 100, and the overall appearance has no exposed screw hole position. The welding gun housing 100 is spliced ​​in two pieces, and the welding gun housing 100 adopts a buckle design. The interior of the welding gun housing 100 adopts a positioning pin hole and a reinforcing rib buckle. Furthermore, a positioning pin is provided on the surface of the integrated welding gun body 2, and the positioning pin cooperates with the welding gun housing 100. The reinforcing rib on the welding gun housing 100 is snapped onto the integrated welding gun body 2 to ensure that the welding gun as a whole does not shake, is firmly installed, and is easy to use. The welding gun housing 100 is provided with one or more of a light switch 4, a wire drawing switch 9, and an indicator light. Through the wire drawing switch 9 on the welding gun, the wire drawing and feeding functions on the wire feeder can be realized. The user does not need to go to the wire feeder to operate, and the delivery and retraction of the welding wire can be realized, which saves the user's time and is more convenient to operate.

[0052] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0055] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An integrated handheld laser welding gun, characterized in that: The integrated handheld laser welding gun comprises an integrated welding gun body (2) and an optical path channel and an air path channel arranged along the propagation direction of the laser; The inlet of the gas path is connected to a cooling gas source, and the cooling gas can sequentially cool the components arranged in the integrated welding gun body (2) as it flows along the gas path.

2. The integrated handheld laser welding gun according to claim 1, characterized in that: A collimating mirror assembly (13), a galvanometer mirror assembly, a focusing mirror assembly (7) and a protective mirror assembly (8) are sequentially arranged in the optical path channel along the propagation direction of the laser.

3. The integrated handheld laser welding gun according to claim 2, characterized in that: The collimating lens assembly (13) comprises a collimating lens barrel (11) and a collimating lens assembly (13); The collimating lens barrel (11) is arranged between the collimating lens group (13) and the laser output head (1), the collimating lens barrel (11) is threadedly connected to the integrated welding gun body (2), and the first end of the collimating lens barrel (11) is in contact with the collimating lens group (13) via a first gasket (12).

4. The integrated handheld laser welding gun according to claim 3, characterized in that: The laser output head (1) is threadedly connected to the second end of the collimating lens barrel (11).

5. The integrated handheld laser welding gun according to claim 2, characterized in that: The gas path channel is arranged on the integrated welding gun body (2), the outlet of the gas path channel is communicated with the optical path channel, and the outlet of the gas path channel is located outside the protective mirror assembly (8).

6. The integrated handheld laser welding gun according to claim 2, characterized in that: The protective mirror assembly (8) comprises a protective mirror drawer (81) and a protective mirror group (82), wherein the protective mirror group (82) is arranged in the protective mirror drawer (81); The integrated welding gun body (2) is provided with a mounting groove connected to the optical path channel, and the protective mirror drawer (81) is detachably arranged in the mounting groove.

7. The integrated handheld laser welding gun according to claim 6, characterized in that: The two end surfaces of the protective mirror assembly (82) are both in contact with a second gasket.

8. The integrated handheld laser welding gun according to claim 6, characterized in that: A heat-conducting component (86) is provided on the outer peripheral surface of the protective mirror drawer (81), and the heat-conducting component (86) is located in the gas path channel.

9. The integrated handheld laser welding gun according to claim 8, characterized in that: The protective mirror assembly (8) also includes a temperature detection unit (6); a through hole is provided on the integrated welding gun body (2) at a position corresponding to the protective mirror drawer (81); the temperature detection unit (6) is arranged in the through hole; and the temperature detection unit (6) is capable of detecting the temperature of the heat-conducting assembly (86) in real time.

10. The integrated handheld laser welding gun according to claim 1, characterized in that: The integrated handheld laser welding gun further comprises a welding gun housing (100), and the welding gun housing (100) is provided with one or more of a light output switch (4), a wire feeding switch (9), and an indicator light.

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