阅读说明：本技术 保护气装置和激光焊接设备 (Shielding gas device and laser welding equipment ) 是由 邓金保 郑志伟 柳宇飞 郑权 莫小辉 钱赞 谭俊文 唐华 黄子龙 董建伟 高云松 于 2019-10-21 设计创作，主要内容包括：本发明涉及一种保护气装置和激光焊接设备,该保护气装置包括压筒和与压筒连接的气嘴,其中,压筒内设有气路,气路具有进气口及与进气口连通的出气口；气嘴设有喷气口；气路设置有多条,间隔设置在压筒内,且各出气口沿第一方向间隔设置,喷气口沿第一方向延伸并与各出气口均连通。本发明提供的保护气装置能够有效提高保护气的覆盖面积,提高焊接效果和焊接的稳定性。(The invention relates to a shielding gas device and laser welding equipment, wherein the shielding gas device comprises a pressure cylinder and an air nozzle connected with the pressure cylinder, wherein a gas path is arranged in the pressure cylinder, and the gas path is provided with a gas inlet and a gas outlet communicated with the gas inlet; the air tap is provided with an air nozzle; the gas circuit is provided with many, and the interval sets up in pressing a section of thick bamboo, and each gas outlet sets up along the first direction interval, and the air jet extends and all communicates with each gas outlet along the first direction. The shielding gas device provided by the invention can effectively improve the coverage area of the shielding gas and improve the welding effect and the welding stability.)

1. A shielding gas device, comprising:

the pressing cylinder is internally provided with a gas path, and the gas path is provided with a gas inlet and a gas outlet communicated with the gas inlet; and

the air nozzle is connected with the pressing cylinder and provided with an air nozzle;

the air paths are arranged in the pressure cylinder at intervals, the air outlets are arranged at intervals along a first direction, and the air nozzles extend along the first direction and are communicated with the air outlets.

2. The shielding gas apparatus of claim 1, wherein each of the gas inlets is spaced apart in a second direction, and the second direction is perpendicular to the first direction.

3. The shielding gas device according to claim 1, wherein the shape of the gas path comprises at least one of an L-shape, a linear shape, a Z-shape, a curved shape, and a broken line shape.

4. The shielding gas device according to claim 1, wherein the gas nozzle is provided with a buffer chamber, the gas nozzle is communicated with the gas path through the buffer chamber, and the volume of the buffer chamber is gradually reduced on the path of the shielding gas flowing through the buffer chamber.

5. The shielding gas device as claimed in claim 4, wherein the gas nozzle comprises a gas inlet surface, a connecting surface and a gas outlet surface connected in sequence, one side of the buffer chamber close to the gas outlet is arranged on the gas inlet surface, the gas outlet surface is provided with the gas nozzle, the gas inlet surface is perpendicular to the connecting surface, and a dihedral angle between the connecting surface and the gas outlet surface is an obtuse angle.

6. The shielding gas apparatus according to claim 1, further comprising a gas joint connected to the pressure tube and communicating with the gas inlet.

7. The shielding gas device according to claim 6, wherein a plurality of gas connectors are provided, and each gas connector is communicated with at least two gas paths.

8. The shielding gas device according to claim 6, further comprising a connecting structure through which the gas joint is connected with the pressure cylinder.

9. The shielding gas device according to claim 1, further comprising a sealing plate connected to the pressing cylinder and located on the same side of the pressing cylinder as the gas nozzle, wherein the sealing plate is provided with a notch, the gas nozzle is located in the notch, and the gas nozzle is communicated with the notch.

10. A laser welding apparatus, characterized by comprising the shielding gas device of any one of claims 1 to 9.

Technical Field

The invention relates to the field of laser welding, in particular to a shielding gas device and laser welding equipment.

Background

In the laser welding process of workpieces, weld quality problems such as air holes generated in welding seams, poor forming and the like can be caused by the fact that molten pool metal contacts air. And because the laser welding temperature is very high, the molten pool metal can easily generate plasma cloud or metal vapor, thereby influencing the transmission of laser and being not beneficial to the stability of the welding process. Therefore, in the laser welding process, the protective gas is introduced to prevent molten pool metal from contacting air during welding, and simultaneously, the plasma cloud and the metal vapor are blown off, so that the welding effect and the stability of the welding process are improved. For the existing shielding gas device, a row type copper pipe shielding gas device is typical, but the diameter of a copper pipe is small, the shielding gas coverage area is limited, the protection effect is limited, and the welding quality of a workpiece can be influenced.

Disclosure of Invention

Aiming at the problem of laser welding protection, the invention provides a shielding gas device capable of effectively improving the welding effect.

A protective gas device comprises a pressure cylinder and an air nozzle connected with the pressure cylinder, wherein a gas path is arranged in the pressure cylinder, and the gas path is provided with a gas inlet and a gas outlet communicated with the gas inlet; the gas circuit is provided with many, and the interval sets up in pressing a section of thick bamboo, and each gas outlet sets up along the first direction interval, and the air cock is equipped with the air jet, and the air jet extends and all communicates with each gas outlet along the first direction.

In one embodiment, the air inlets are spaced along a second direction, and the second direction is perpendicular to the first direction.

In one embodiment, the air path is at least one of L-shaped, linear, Z-shaped, curved and broken.

In one embodiment, the air tap is provided with a buffer cavity, the air nozzle is communicated with the air passage through the buffer cavity, and the volume of the buffer cavity is gradually reduced on the path of the protective air flowing through the buffer cavity.

In one embodiment, the air tap comprises an air inlet face, a connecting face and an air outlet face which are connected in sequence, one side of the buffer cavity close to the air outlet is arranged on the air inlet face, the air outlet face is provided with an air jet, the air inlet face is perpendicular to the connecting face, and a dihedral angle between the connecting face and the air outlet face is an obtuse angle.

In one embodiment, the air connecting device further comprises an air connector, wherein the air connector is connected with the pressing cylinder and is communicated with the air inlet.

In one embodiment, the air connectors are provided in plurality, and each air connector is communicated with at least two air paths.

In one embodiment, the device further comprises a connecting structure, and the air connector is connected with the pressing cylinder through the connecting structure.

In one embodiment, the sealing device further comprises a sealing plate, the sealing plate is connected with the pressing cylinder and is located on the same side of the pressing cylinder as the air nozzle, the sealing plate is provided with a notch, the air nozzle is located in the notch, and the air nozzle is communicated with the notch.

The invention also provides laser welding equipment comprising any one of the shielding gas devices.

The embodiment of the invention has the following beneficial effects:

foretell protective gas device is equipped with the gas circuit of many gas outlets and air cock intercommunication in pressing the section of thick bamboo, and the air cock air jet extends along the direction that sets up of each gas outlet, and protective gas in each gas circuit is sprayed by the air cock air jet after the air cock is inside converges, can effectively improve the coverage area of protective gas, and then improves welding effect and welded stability.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Wherein:

FIG. 1 is a schematic structural diagram of a shielding gas device according to an embodiment;

FIG. 2 is a schematic cross-sectional view of the shielding gas device shown in FIG. 1;

FIG. 3 is a schematic view of the air faucet of the shielding gas device shown in FIG. 1;

FIG. 4 is a side view of the air cap of the shielding gas device shown in FIG. 1;

FIG. 5 is a cross-sectional view of the air faucet shown in FIG. 4 taken in the direction A-A;

fig. 6 is a schematic structural view of a sealing plate in the shielding gas device shown in fig. 1.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only. The term "plurality", as used herein, is considered to be at least two, i.e., to include two and more than two.

Unless defined otherwise, 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 belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the process of laser welding of workpieces, due to the existence of air and plasma cloud or metal steam caused by high temperature, the welding effect and the stability of the welding process are seriously influenced, and protective gas needs to be introduced in the process of laser welding. However, the existing shielding gas device has limited shielding gas coverage area, so that the protection effect is limited, and the welding quality of workpieces is influenced. Based on this, this embodiment provides a shielding gas device to effectively improve the welding effect.

Specifically, referring to fig. 1 and 2, the shielding gas device includes a pressure cylinder 1 and a gas nozzle 2 connected to the pressure cylinder 1. Wherein, be equipped with gas circuit 11 in pressing a section of thick bamboo 1, gas circuit 11 has air inlet 111 and the gas outlet 112 of being linked together with air inlet 111. The air passages 11 are arranged in the pressing cylinder 1 at intervals, and the air outlets 112 are arranged at intervals along the first direction I; the air faucet 2 is provided with an air nozzle 21, and the air nozzle 21 extends along the first direction I and is communicated with each air outlet 112.

In the embodiment of the present application, the first direction I is selected in relation to the welding position of the workpiece surface, and generally, the first direction I is arranged parallel to the welding direction of the welding position of the workpiece surface, and when the area of the gas nozzle 21 is large enough, the first direction I may form a certain angle with the welding direction of the welding position of the workpiece surface, as long as the shielding gas jetted through the gas nozzle 2 can form a shielding gas layer at the welding position of the workpiece surface, and can play a certain role in protecting the welding position of the workpiece surface during the welding process. In addition, one gas nozzle 21 may be provided, or a plurality of gas nozzles may be provided, which is determined by the size of the single gas nozzle 21 and the required amount of shielding gas for the welding position of the workpiece surface during welding, and is not limited in this application.

A plurality of air channels 11 are arranged in the pressure cylinder 1 at intervals, and air outlets 112 of the air channels 11 are arranged at intervals along the first direction I and communicated with air outlets 21 which are also arranged in an extending mode along the first direction I. The protective gas enters the pressure cylinder 1 from the gas inlet 111 of each gas path 11, flows out from the gas outlet 112, flows in the gas nozzle 2 and is sprayed out from the gas nozzle 21, so that the coverage area of the protective gas at the welding position on the surface of the workpiece can be effectively increased, and the welding effect and the welding stability of the workpiece in the laser welding process can be further improved.

The air passages 11 are spaced apart, and the air outlets 112 are spaced apart along the first direction I, so that the air inlets 111 are also spaced apart. The air inlets 111 may be arranged in a predetermined direction or may be distributed in a disordered state.

As shown in fig. 2, the air inlets 111 are further spaced along a second direction II, and the second direction II is perpendicular to the first direction I. Each air inlet 111 is arranged according to the second direction II perpendicular to the first direction I, the structure is simple, production and processing are convenient, the application range of the protective gas device is expanded, and popularization and application of the protective gas device are facilitated.

In the present embodiment, the air inlet 111 and the air outlet 112 are respectively disposed on two adjacent surfaces of the pressing cylinder 1, specifically, in the present embodiment, the pressing cylinder 1 is in a rectangular parallelepiped shape and includes a first surface and a second surface that are disposed adjacent to each other, the air inlet 111 is disposed on the first surface, and the air outlet 112 is disposed on the second surface. In other embodiments, the air inlet 111 and the air outlet 112 may also be disposed on the same surface of the pressure cylinder 1, for example, the air inlet 111 and the air outlet 112 may both be disposed on a second surface, in which case, the air path may be U-shaped; the air inlet 111 and the air outlet 112 may also be disposed on two opposite surfaces of the pressing cylinder 1, which are not described in detail herein.

Further, in the present embodiment, the extension of the first surface in the second direction II is smaller than the extension of the second surface in the first direction I, and the distance between two adjacent air inlets 111 is smaller than the distance between two adjacent air outlets 112. The arrangement ensures that the coverage area of the protective gas is larger, the volume of the pressing cylinder 1 can be reduced, and the space occupied by the protective gas device is further reduced.

Further, the shape of the air path 11 includes at least one of an L shape, a linear shape, a Z shape, a curved shape, and a broken line shape. In some embodiments, the shape of each air path 11 may be the same, for example, the air paths 11 may be all L-shaped, and the shape of each air path 11 may also be different from each other, for example, one of the air paths is L-shaped, and the other air paths are linear or Z-shaped, and the like. Specifically to this embodiment, L type is all set for to gas circuit 11, because L type gas circuit workable, and the gas circuit of L type has certain cushioning effect to the flow of protective gas, makes in protective gas can be comparatively steady gets into air cock 2, does benefit to the protective gas and forms even gas in air cock 2, and then is favorable to improving welding effect.

As shown in fig. 2 and 3, the gas nozzle 2 is further provided with a buffer chamber 22, the gas nozzle 21 is communicated with the gas path 11 through the buffer chamber 22, and the volume of the buffer chamber 22 is gradually reduced on the path of the protective gas flowing through the buffer chamber 22. The gradual decrease in the volume of the buffer chamber 22 in the present embodiment refers to the gradual decrease in the volume of the buffer chamber 22 on the path of the shielding gas flowing through the buffer chamber 22, including the case where the volume of the buffer chamber 22 is not changed or is increased on part of the path. After the shielding gas in each gas path 11 enters the buffer cavity 22 from each gas outlet 112, the rectification of the shielding gas can be realized by the buffering action of the buffer cavity 22, the shielding gas can be uniformly blown on the surface of a workpiece after being sprayed out from the gas nozzle 21 after flowing through the buffer cavity 22, and a shielding gas layer is formed at the welding position of the surface of the workpiece, so that welding slag can be effectively reduced, the tension after welding is increased, and the welding effect is further improved.

As shown in fig. 3, 4, and 5, in the present embodiment, the cushion chamber 22 is provided in a stepped shape. More specifically, the air faucet 2 is provided with three cavities, namely a first cavity 221, a second cavity 222 and a third cavity 223, the first cavity 221, the second cavity 222 and the third cavity 223 are communicated to form the buffer cavity 22, wherein the first cavity 221 is communicated with the air outlet 112, the third cavity 223 is communicated with the air outlet 21, the volumes of the first cavity 221, the second cavity 222 and the third cavity 223 are gradually reduced, and the shielding gas can sequentially pass through the first cavity 221, the second cavity 222 and the third cavity 223 when flowing through the buffer cavity 22.

It should be understood that, in other embodiments, the number of the cavities in the gas nozzle 2 may also be two, four or more, and when the number of the cavities is greater than or equal to 3, the volumes of two or more cavities may be equal, for example, for the first cavity, the second cavity and the third cavity in this embodiment, the volumes of the first cavity and the second cavity may also be equal, or the volumes of the second cavity and the third cavity may also be equal.

Further, the shape of the buffer chamber 22 may be a stepped shape, a trapezoidal shape, a circular truncated cone shape, a spiral shape, or an irregular shape.

Further, the air faucet 2 comprises an air inlet surface 23, a connecting surface 24 and an air outlet surface 25 which are sequentially connected, one side of the buffer cavity 22 close to the air outlet 112 is arranged on the air inlet surface 23, the air outlet surface 25 is provided with an air jet 21, the air inlet surface 23 is perpendicular to the connecting surface 24, and a dihedral angle between the connecting surface 24 and the air outlet surface 25 is an obtuse angle. The direction that the protective gas got into air cock 2 is not on a straight line with the direction that leaves air cock 2, can effectively ensure the protective gas more and at the inside buffering misce bene of air cock 2 to be favorable to guaranteeing that the protective gas can evenly blow on the welding position surface on workpiece surface, further improve welding effect. In addition, this kind of structure is set to air cock 2, can effectively ensure that air jet 21 is directly relative with workpiece surface's welding position, make the protective gas directly blow on workpiece surface's welding position and form the protective gas layer, avoid the protective gas because of blowing the waste that the protective gas coverage area that causes to other directions is little and the protective gas, effectively improve the coverage area of protective gas, and then be favorable to improving the welding effect of work piece, and practice thrift the quantity of protective gas, help popularization and application of protective gas device on industrial production.

As shown in fig. 1 and 2, the shielding gas device further includes a gas joint 3, and the gas joint 3 is connected to the pressure cylinder 1 and is communicated with the gas inlet 111. The gas joint 3 is used for externally connecting a gas source for providing shielding gas and has good connection stability, so that the shielding gas is smoothly introduced into the gas path 11, the welding effect is improved, and the gas source is conveniently and quickly detached by a worker to improve the working efficiency. It will be understood that in other embodiments, it is also possible to provide an interface directly to the air supply on the pressure tube 1, so that the separately formed air connection 3 is omitted.

Further, the air connectors 3 are provided in plurality, and each air connector 3 is communicated with at least two air paths 11. The gas connectors 3 are arranged in a plurality of numbers and can be connected with a plurality of gas sources to ensure that sufficient protective gas is supplied in the welding process. Each air connector 3 is communicated with at least two air paths 11, so that the structure can be simplified, the occupied space can be reduced, and the welding cost can be reduced on the premise of sufficient supply of the shielding gas. Specifically, in this embodiment, the number of the air connectors 3 is two, the number of the air paths 11 is four, and each air connector 3 is connected with two air paths 11. Of course, in other embodiments, the number of the gas connectors 3 and the number of the gas paths 11 may be changed according to the actual welding situation, for example, the number of the gas connectors 3 may also be 1, 3 or more, and the number of the gas paths 11 may also be 2, 3, 5 or more.

It is worth mentioning that the distance between two adjacent air inlets 111 is smaller, so that the size of the air connector 3 can be correspondingly reduced, and the space occupied by the shielding gas device is further reduced.

In addition, the corresponding relationship between the air connectors 3 and the air paths 11 may also be changed, for example, in an embodiment, the air connectors 3 may also be arranged in one-to-one correspondence with the air paths 11, that is, each air path 11 is correspondingly communicated with one air connector 3, or in other embodiments, only one air connector 3 may be arranged, and one air connector 3 is correspondingly communicated with all the air paths 11, or in other embodiments, each air connector 3 may also be correspondingly communicated with three or more air paths 11.

It should be noted that, in the specific implementation manner of the present embodiment, each air path 11 is communicated with at least one air connector 3. If there is not the gas circuit 11 with the gas connection 3 intercommunication, then the protective gas in other gas circuits can follow gas outlet 112 escape this gas circuit 11, causes the waste of protective gas, and further, if the air inlet 111 of this gas circuit 11 is not sealed, communicates with the atmosphere, then protective gas escapes from this air inlet 111, causes the gas leakage phenomenon, not only causes the waste of protective gas, still can not ensure that there is sufficient protective gas among the laser welding process, and welding effect is poor. Each gas circuit 11 is connected with at least one gas connector 3, so that the gas tightness of the protective gas device in the working process can be guaranteed, the protective gas is distributed at the welding position on the surface of a workpiece, and the welding effect is further improved.

Specifically, one air passage 11 may communicate with one air connector 3, or may communicate with two or another number of air connectors 3. For example, in one embodiment, there are two air connectors 3, there are 5 air paths 11 in a certain direction, each air connector 3 is respectively communicated with 3 air paths 11, and the air path 11 in the middle position is communicated with both air connectors 3. When an air path 11 communicates with a plurality of air connectors 3, it is possible to ensure the air tightness of the device through a certain structural design, for example, structural design is performed on the air connectors 3, so that the adjacent air connectors 3 can be tightly attached or connected together, or a sealing member is additionally arranged between the adjacent air connectors 3, or structural design is performed on the air inlet 111 of the air path 11 to ensure the air tightness of the air connectors 3 connected with the air path 11.

Further, the protective gas device also comprises a connecting structure, and the gas joint 3 is connected with the pressure cylinder 1 through the connecting structure. Specifically, the connecting structure comprises an air inlet plate 41 and a bottom plate 42, wherein one air joint 3 is connected with the pressing cylinder 1 through the air inlet plate 41, so that the stability of connection between the air joint 3 and the pressing cylinder 1 can be improved; the other air joint 3 is stably connected with the pressure cylinder 1 through the bottom plate 42, and meanwhile, the bottom plate 42 can be matched with other external structures and equipment, so that the installation and the application of the protective air device are facilitated, and the application range of the protective air device is expanded.

In this embodiment, the air inlet plate 41 is detachable from the bottom plate 42, that is, the connection structure is a split structure, and in other embodiments, the air inlet plate 41 may be integrally formed with the bottom plate 42, that is, the connection structure may also be an integrated structure. In other embodiments, the connection structure may be omitted, and the air joint 3 may be directly connected to the pressure tube 1.

As shown in fig. 1, fig. 2 and fig. 5, the shielding gas device further includes a sealing plate 5, the sealing plate 5 is connected to the pressure cylinder 1 and located at the same side of the pressure cylinder 1 as the gas nozzle 2, the sealing plate 5 is provided with a gap 51, the gas nozzle 2 is located in the gap 51, and the gas nozzle 21 is communicated with the gap 51. In the work piece laser welding process, sealing member 5 can closely laminate with the work piece, has reduced the relative size that the protective gas can fill the space volume, prevents that the protective gas from to keeping away from the laser welding position diffusion, not only can practice thrift the quantity of protective gas, still helps forming stable effectual protective gas layer to help improving welding effect.

The embodiment also provides laser welding equipment comprising any one of the shielding gas devices. The laser welding equipment refers to equipment comprising a laser welding head and any one of the shielding gas devices.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.