CN219234261U - Dust hood and laser welding equipment - Google Patents

Abstract

The application discloses dust excluding hood and laser welding equipment. The dust hood comprises a side wall which surrounds and forms a welding cavity, a dust removing opening is formed in the side wall along a first direction, a first welding opening and a second welding opening are respectively formed at two opposite ends of the side wall along a second direction, the first welding opening is used for laser injection, the second welding opening is used for being close to an object to be welded, at least part of the side wall is obliquely arranged relative to the second direction, and the inner surface of the side wall faces the first welding opening; wherein the first direction and the second direction are arranged in an intersecting manner. The dust excluding hood of this application is convenient for smoke and dust and welding slag to be taken away from the welding chamber through the dust removal mouth, has improved the dust removal effect.

Description

Dust hood and laser welding equipment

Technical Field

The application relates to the field of welding technology, in particular to a dust hood and laser welding equipment.

Background

The laser welding equipment is a machine for producing laser welding workpieces, and utilizes the heat generated by laser to butt-weld two parts together, thereby realizing high-efficiency automation. In the laser welding process, a large amount of smoke dust is generated near the welding position, and the smoke dust can form defects of dust pollution, welding slag and the like at the welding position, so that the quality of a workpiece is influenced, and the working environment is polluted.

At present, a conventional dust removing mode generally comprises the step of placing a dust removing cover on the periphery of a welding spot, and exhausting air in the dust removing cover to remove dust in a welding area. But the smoke dust and welding slag generated by the current laser welding easily fall to the surface or the inside of the object to be welded along the inner surface of the dust hood, so that the dust removal effect is reduced.

Disclosure of Invention

The embodiment of the application provides a dust excluding hood and laser welding equipment, and it can improve the dust removal effect of dust excluding hood.

In a first aspect, an embodiment of the present application provides a dust hood, including a side wall enclosing to form a welding cavity, where a dust removing opening is formed in the side wall along a first direction, opposite ends of the side wall along a second direction are respectively a first welding opening and a second welding opening, the first welding opening is used for laser to inject, the second welding opening is used for being close to an object to be welded, at least part of the side wall is obliquely arranged relative to the second direction, and an inner surface of the side wall faces the first welding opening; wherein the first direction and the second direction are arranged in an intersecting manner.

In the scheme, the dust hood can be placed above the object to be welded during laser welding, the second welding port is aligned with the welding spot, then the generated laser can penetrate into the welding cavity through the first welding port by the laser welding device, and smoke dust and welding slag in the welding cavity are pumped away through the dust removal port on the side wall during welding. Because at least part of side wall is inclined to the second direction and the inner surface faces the first welding port, the part forms a rebound surface, spark generated by laser welding can rebound to the direction of the first welding port after touching the part, and the spark is difficult to fall to the direction of the second welding port, so that smoke dust and welding slag can be pumped away from the welding cavity through the dust removing port, and the dust removing effect is improved.

In some embodiments, the side wall comprises two first side walls oppositely arranged along the first direction and two second side walls oppositely arranged along the third direction, the first side walls are connected with the second side walls, at least one of the two first side walls is obliquely arranged relative to the second direction, and the inner surface of the side wall faces the first welding port; wherein the first direction and the third direction are arranged to intersect.

In the above-mentioned scheme, after the spark that laser welding produced touched the internal surface to the first lateral wall of slope, can rebound to the direction of first welding mouth for smoke and dust and welding slag are difficult for dropping to the direction of second welding mouth, and the smoke and dust and welding slag of being convenient for are taken away from the welding chamber through the dust removal mouth, have improved the dust removal effect. And the two first side walls and the two second side walls are enclosed to form the side wall, so that the volume of a welding cavity formed by enclosing the side wall is larger, and welding is facilitated.

In some embodiments, the dust removing opening is formed in one of the two first side walls, that is, the side wall has only one dust removing opening, which can facilitate the arrangement of one dust removing cover respectively at two welding spots which are relatively arranged to be welded, i.e. the design of separating the dust removing covers. If the distance between two opposite welding spots changes, the distance between the two dust hoods can be adjusted adaptively, and the dust hood of the embodiment can adapt to objects to be welded with different sizes, so that the compatibility of the dust hood is improved.

In some embodiments, the edge of the dust removing opening is close to the edge of the first side wall, so that the area of the dust removing opening is increased, and the dust removing effect is further improved.

In some embodiments, the dust hood further comprises a dust removal pipe connected to the side having the dust removal opening in the side wall, the dust removal pipe being in communication with the welding chamber through the dust removal opening. The dust removal pipe can collect smoke dust and welding slag generated by welding, and is convenient for pumping away the smoke dust and the welding slag.

In some embodiments, the dust removal pipe includes a first pipe body disposed along an edge of the dust removal port, the first pipe body extending obliquely in a direction proximate to the first weld port.

In the scheme, the first pipe body is obliquely arranged in the direction close to the first welding port, so that smoke dust and welding slag can be conveniently pumped away in the direction of the first welding port, and the probability that the smoke dust and the welding slag drop downwards is reduced.

In some embodiments, the dust removal pipe still includes the second body, and the second body is including the first section and the second section that connect gradually, and first section and first body coupling, second section are to the direction bending extension of keeping away from the side wall, reduce the occupation space of second body for the structure of dust excluding hood is compacter.

In some embodiments, the dust removal pipe is provided with a wind measuring port, so that the wind speed in the welding cavity can be conveniently detected, and the wind speed can be adjusted according to requirements.

In some embodiments, at least one of the two second sidewalls is disposed obliquely to the second direction with its inner surface facing the first weld opening. After spark that laser welding produced touches the internal surface of the second lateral wall of slope, can rebound to the direction of first welding mouth for smoke and dust and welding slag are difficult for dropping to the direction of second welding mouth, and the smoke and dust and welding slag of being convenient for are taken away from the welding chamber through the dust removal mouth, have improved the dust removal effect.

In some embodiments, the cross section of the side wall is trapezoid, the length of the first side wall, which is not provided with the dust removing opening, along the third direction is D1, and the length of the first side wall, which is provided with the dust removing opening, along the third direction is D2, wherein D1 is less than D2. The internal surface of second lateral wall is towards the dust removal mouth, and the spark that laser welding produced touches behind the second lateral wall of slope, can rebound to the direction of dust removal mouth to smoke and dust and welding slag accessible direct dust removal mouth are taken away from the welding chamber, have improved dust removal efficiency.

In some embodiments, the dust hood includes a plurality of side panels arranged in sequence. The dust hood can remove dust by welding a plurality of welding spots simultaneously, and the production efficiency is improved.

In some embodiments, the dust hood is of a hollow structure between adjacent side walls, so that the weight of the dust hood is reduced, and the lightweight design of the dust hood is facilitated.

In some embodiments, the inclination angle of at least part of the side wall relative to the second direction is 10-20 degrees, so that after the spark generated by laser welding touches the part, the spark can rebound towards the direction of the first welding port, the spark cannot fall towards the direction of the second welding port easily, the inclination angle of the side wall is prevented from being too large, smoke dust and welding slag can rebound conveniently and then aim at the dust removal port, and the spark can be conveniently pumped out of the welding cavity.

In a second aspect, embodiments of the present application provide a laser welding apparatus including a dust hood and a laser welding device for providing a laser that is injected into a welding cavity.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an exploded structure of a battery cell according to some embodiments of the present application;

FIG. 2 is a schematic view of a dust hood according to some embodiments of the present application;

FIG. 3 is a schematic view of the dust hood of FIG. 2 at another angle;

FIG. 4 is a schematic structural view of a dust hood according to some embodiments of the present application;

fig. 5 is a schematic structural diagram of a battery cell and a dust hood according to some embodiments of the present disclosure;

FIG. 6 is a schematic view of a dust hood according to further embodiments of the present application;

FIG. 7 is a schematic view of a dust hood according to other embodiments of the present application;

FIG. 8 is a schematic view of a part of the dust hood according to other embodiments of the present application;

fig. 9 is a schematic structural view of a dust hood according to still other embodiments of the present application.

The reference numerals are as follows:

a dust hood 100; side wall 10; a welding chamber 10a; a dust removal port 10b; a first welding port 10c; a second welded joint 10d; a first side wall 11; a second side wall 12; a hollow structure 13; a dust removing pipe 30; a first pipe body 31; a second tube 32; a first section 321; a second section 322; a tuyere 31a; a battery cell 20; a housing 22; an end cap 21; a first side 20a; a second side 20b; a first direction X; a second direction Z; and a third direction Y.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

During laser welding, a large amount of smoke is generated near the welding position, and the smoke can form defects such as dust pollution, welding slag and the like at the welding position. The sparks generated by laser welding typically splash around to produce smoke and slag. The conventional dust removal mode generally comprises the step of placing a dust hood on the periphery of a welding spot, and exhausting air in the dust hood to remove dust in a welding area. But the internal surface of present dust excluding hood is vertical design, and the internal surface of dust excluding hood is vertical face promptly, and after the spark touched the internal surface of dust excluding hood, the smoke and dust and the welding slag that produce drop to the surface or the inside of waiting the welded object along the internal surface of dust excluding hood easily, have reduced dust removal effect.

In view of this, the application provides a technical scheme, in the technical scheme, the dust hood comprises a side wall which encloses to form a welding cavity, dust removal openings are formed in the side wall along a first direction, the opposite ends of the side wall along a second direction are respectively provided with a first welding opening and a second welding opening, the first welding opening is used for injecting laser, the second welding opening is used for being close to an object to be welded, at least part of the side wall is obliquely arranged relative to the second direction, and the inner surface of the side wall faces the first welding opening; wherein the first direction and the second direction are arranged in an intersecting manner. The dust hood can be placed above the object to be welded during laser welding, the second welding port is aligned with the welding spot, then the generated laser can penetrate into the welding cavity through the first welding port by the laser welding device, and smoke dust and welding slag in the welding cavity are pumped away through the dust removal port on the side wall during welding. Because at least part of side wall is inclined to the second direction and the inner surface faces the first welding port, the part forms a rebound surface, spark generated by laser welding can rebound to the direction of the first welding port after touching the part, and the spark is difficult to fall to the direction of the second welding port, so that smoke dust and welding slag can be pumped away from the welding cavity through the dust removing port, and the dust removing effect is improved.

It should be noted that, the dust hood of the embodiment of the present application is particularly suitable for being used as a dust hood welded by a housing and an end cover of a battery cell, but is not limited to be used as a dust hood welded by a housing and an end cover of a battery cell, and if other devices use the dust hood provided by the present application, the dust hood shall also fall into the protection scope of the present application. For example, the dust hood disclosed by the embodiment of the application can be further applied to dust removal in other occasions such as metal welding, woodworking, 3D printing, automobile maintenance and the like.

Wherein each battery cell may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped.

Referring to fig. 1, fig. 1 is a schematic diagram illustrating an exploded structure of a battery cell 20 according to some embodiments of the present disclosure. The battery cell 20 refers to the smallest unit constituting the battery. The battery cell 20 includes a housing 22, an electrode assembly 23, and other functional components. The end cap 21 refers to a member that is covered at the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 may be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cover 21 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 21 is not easy to deform when being extruded and collided, so that the battery cell 20 can have higher structural strength, and the safety performance can be improved. The end cap 21 may be provided with functional parts such as electrode terminals 26. The electrode terminals 26 may be used to be electrically connected with the electrode assembly 23 for outputting or inputting electric power of the battery cell 20.

The case 22 is an assembly for forming the internal environment of the battery cell 20, wherein the formed receiving chamber may be used to receive the electrode assembly 23, the electrolyte, and other components. The housing 22 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 22 may be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiments of the present application. The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20.

FIG. 2 is a schematic view of a dust hood according to some embodiments of the present application; fig. 3 is a schematic view of a dust hood shown in fig. 2 at another angle. Referring to fig. 2 and 3 in combination, the embodiment of the present application provides a dust hood 100, which includes a side wall 10 enclosing a welding cavity 10a, the side wall 10 is provided with a dust removing opening 10b along a first direction X, opposite ends of the side wall 10 along a second direction Z are respectively provided with a first welding opening 10c and a second welding opening 10d, the first welding opening 10c is used for injecting laser, the second welding opening 10d is used for approaching an object to be welded, at least part of the side wall 10 is obliquely arranged relative to the second direction Z, and the inner surface of the side wall 10 faces the first welding opening 10c; wherein the first direction X and the second direction Z are arranged in an intersecting manner.

The side wall 10 may have a circular ring shape, a rectangular parallelepiped shape or other polygonal shape with a welding chamber 10a formed in the middle. The first direction X may be a horizontal direction, and the dust removing port 10b may be a circular, rectangular or other polygonal shape. An exhaust fan may be connected to one side of the dust removing port 10b, and air inside the dust removing cap 100 may be extracted by the exhaust fan to maintain negative pressure inside the dust removing cap 100, and at the same time, smoke dust and welding slag may be extracted.

The second direction Z may be a vertical up-down direction, the dust hood 100 is located above the object to be welded, and the laser welding device is located above the dust hood 100. The laser welding apparatus may include a laser that generates a high-energy laser beam and an optical system that focuses the laser beam onto a workpiece through an optical element such as a collimator lens, a mirror, or the like. For example, the laser welding device can be a laser scanner, also called a laser galvanometer, which consists of an X-Y optical scanning head, an electronic drive amplifier and an optical reflection lens. The signal provided by the computer controller drives the optical scanning head through the driving amplifying circuit, so that the deflection of the laser beam is controlled in the X-Y plane.

Taking the to-be-welded object as the battery cell 20 as an example, when the end cover 21 of the battery cell 20 is welded to the housing 22, the dust hood 100 is placed above the battery cell 20, and the second welding port 10d is aligned with the welding points of the end cover 21 and the housing 22, so that the dust hood 100 surrounds the outer circumference of the welding points. The laser generated by the laser welding device can penetrate through the first welding port 10c to enter the welding cavity 10a, and during welding, smoke dust and welding slag in the welding cavity 10a are pumped out through the dust removing port 10b on the side wall 10.

In the above scheme, since at least part of the side wall 10 is obliquely arranged relative to the second direction Z, and the inner surface of the side wall is directed towards the first welding port 10c, a rebound surface is formed at the part, after the spark generated by laser welding touches the part, the spark can rebound towards the direction of the first welding port 10c, the spark is not easy to fall towards the direction of the second welding port 10d, and smoke dust and welding slag generated by the welding spark are conveniently pumped away from the welding cavity 10a through the dust removing port 10b, so that the dust removing effect is improved.

Fig. 4 is a schematic structural view of a dust hood according to some embodiments of the present application. As shown in fig. 4, in some embodiments, the side wall 10 includes two first side walls 11 disposed opposite to each other along the first direction X and two second side walls 12 disposed opposite to each other along the third direction Y, the first side walls 11 are connected to the second side walls 12, at least one of the two first side walls 11 is disposed obliquely to the second direction Z, and an inner surface thereof faces the first welding port 10c; wherein the first direction X and the third direction Y are disposed to intersect.

The second direction Z and the third direction Y may both be horizontal directions, for example, the second direction Z is a front-rear direction, and the third direction Y is a left-right direction. The dust removal port 10b may be provided on the first side wall 11 or the second side wall 12, the dust removal port 10b may be provided on only one of the first side walls 11 or one of the second side walls 12, the dust removal port 10b may be provided on both of the first side walls 11, or the dust removal port 10b may be provided on both of the second side walls 12.

In the above scheme, after the spark generated by laser welding touches the inner surface of the inclined first side wall 11, the spark can rebound towards the direction of the first welding port 10c, so that smoke dust and welding slag are not easy to fall towards the direction of the second welding port 10d, the smoke dust and the welding slag are conveniently pumped away from the welding cavity 10a through the dust removing port 10b, and the dust removing effect is improved. And the two first side walls 11 and the two second side walls 12 are enclosed to form the side wall 10, so that the volume of a welding cavity 10a formed by enclosing the side wall 10 is larger, and welding is facilitated.

In some embodiments, the dust removing opening 10b is formed in one of the two first sidewalls 11. That is, the side wall 10 has only one dust removing opening 10b, so that it is convenient to arrange one dust removing cover 100 respectively at two welding spots which are oppositely arranged to be welded, i.e. the dust removing cover 100 is designed in a split manner.

Fig. 5 is a schematic structural diagram of a battery cell and a dust hood according to some embodiments of the present application. As shown in fig. 5, taking the to-be-welded object as the battery cell 20 as an example, two opposite sides of the end cover 21 of the battery cell 20 along the first direction X are respectively a first side 20a and a second side 20B, the first side 20a and the second side 20B are respectively welded to the housing 22 of the battery cell 20, the first side 20a has a first welding point a, the second side 20B has a second welding point B, and the first welding point a and the second welding point B are oppositely arranged along the first direction X. If the dust removing openings 10B are formed in the two first side walls 11, a dust removing cover 100 is used to surround the first welding spot a and the second welding spot B which are oppositely arranged, so that a dust removing blind area is formed between the first welding spot a and the second welding spot B, the dust removing effect is poor, and smoke dust and welding slag are easily accumulated on the surface of the battery cell 20.

In this embodiment, only one first sidewall 11 is provided with a dust removing opening 10B, and a dust removing cover 100 may be disposed around the first welding point a, and a dust removing cover 100 may be disposed around the second welding point B. During welding, welding sparks do not exist between the first welding spot A and the second welding spot B, so that dust removing blind areas are eliminated. If the distance between two opposite welding spots changes, the distance between the two dust hoods 100 can be adaptively adjusted, and the dust hoods 100 of the embodiment can adapt to the objects to be welded with different sizes, so that the compatibility of the dust hoods 100 is improved.

In some embodiments, the edge of the dust removal port 10b is disposed near the edge of the first sidewall 11. The dust removing opening 10b may be rectangular, and the dust removing opening 10b is formed on the whole wall surface of the first side wall 11 as much as possible, so that the area of the dust removing opening 10b is increased, and the dust removing effect is further improved.

Fig. 6 is a schematic structural view of a dust hood according to other embodiments of the present application. As shown in fig. 6, the dust hood 100 further includes a dust removing pipe 30 connected to a side of the side body 10 having the dust removing port 10b, and the dust removing pipe 30 communicates with the welding chamber 10a through the dust removing port 10b. The dust removing pipe 30 may be disposed along the edge of the dust removing port 10b, and the dust removing pipe 30 may collect dust and slag generated by welding, so as to facilitate the pumping of the dust and slag away.

In some embodiments, the dust removing pipe 30 includes a first pipe body 31, the first pipe body 31 is disposed along an edge of the dust removing port 10b, and the first pipe body 31 is obliquely extended in a direction approaching the first welding port 10c, i.e., the first pipe body 31 is disposed obliquely upward. The first pipe body 31 is obliquely arranged in a direction close to the first welding port 10c, so that smoke dust and welding slag can be conveniently pumped away in the direction of the first welding port 10c, and the probability of falling down of the smoke dust and the welding slag is reduced.

In some embodiments, the dust removing tube 30 further includes a second tube body 32, where the second tube body 32 includes a first section 321 and a second section 322 that are sequentially connected, the first section 321 is connected to the first tube body 31, and the second section 322 is bent and extended in a direction away from the side wall 10.

The first section 321 extends obliquely, i.e., obliquely upward, in the direction of the first welding port 10c so that the direction of the wind received by the smoke and slag in the welding chamber 10a is in the direction of the first welding port 10c, preventing it from falling downward due to the action of gravity. The second section 322 is a bent pipe, and the bend extends upwards, and compared with the design that the second section 322 continues to extend along the extending direction of the first section 321, the size of the dust hood 100 in the horizontal direction can be reduced, the occupied space of the second pipe 32 is reduced, and the structure of the dust hood 100 is more compact.

In some embodiments, the dust removal tube 30 is provided with a tuyere 31a.

An air pipe protruding outwards can be arranged on the dust removing pipe 30, and an air measuring port 31a is arranged at one end of the air pipe away from the dust removing pipe 30. The wind speed of the dust hood 100 may be measured by a flow meter or an anemometer. The flow meter is a device that can directly measure the air flow rate, and is installed at the air-measuring port 31a, and the wind speed is calculated by reading the reading of the flow meter. The anemometer is a device capable of measuring wind speed, and can directly read the current wind speed by placing the anemometer at the wind measuring port 31a.

The wind speed in the dust hood 100 can be known through the wind measuring port 31a in the embodiment, so that the wind speed in the welding cavity 10a can be conveniently detected, and the wind speed can be adjusted according to the requirement.

Alternatively, the air measuring port 31a may be provided at a position close to the side wall 10, that is, a position close to the welding chamber 10a, so that the wind speed in the welding chamber 10a can be detected more accurately to be able to adjust the wind speed as required.

In some embodiments, at least one of the two second side walls 12 is disposed obliquely with respect to the second direction Z, and its inner surface faces the first welding port 10c.

That is, the inner surface of at least one of the two second side walls 12 faces obliquely upward, and specifically, the inner surface of one of the second side walls 12 may face obliquely upward, or the inner surfaces of both the second side walls 12 may face obliquely upward.

After the spark generated by laser welding touches the inner surface of the inclined second side wall 12, the spark can rebound towards the direction of the first welding port 10c, so that smoke dust and welding slag are not easy to fall towards the direction of the second welding port 10d, the smoke dust and the welding slag are conveniently pumped away from the welding cavity 10a through the dust removing port 10b, and the dust removing effect is improved.

Optionally, the two first side walls 11 and the two second side walls 12 are both obliquely arranged relative to the second direction Z, and the inner surfaces of the two first side walls and the two second side walls face the first welding port 10c, so that the inner surfaces of each side wall of the side wall 10 can form a rebound surface, and when sparks generated by laser welding splash everywhere, each side wall can rebound the sparks towards the direction of the first welding port 10c, thereby further improving the dust removal effect.

Further, the two first side walls 11 and the two second side walls 12 are both inclined with respect to the second direction Z, and the inner surfaces thereof face the first welding port 10c, and the dust removing port 10b is provided only on one first side wall 11, and the inclination angle of the first side wall 11 without the dust removing port 10b is larger than the inclination angle of the first side wall 11 with the dust removing port 10b. Since the rebound area of the first side wall 11 where the dust removing port 10b is not provided is larger, the rebound area of the first side wall 11 where the dust removing port 10b is provided is smaller, and the spark splashes to the dust removing port 10b can be directly drawn away, the inclination angle is not too large.

FIG. 7 is a schematic view of a dust hood according to other embodiments of the present application; fig. 8 is a schematic view of a part of the structure of a dust hood according to other embodiments of the present application. Referring to fig. 7 and 8 in combination, in other embodiments, the cross section of the side wall 10 is trapezoid, the length of the first sidewall 11 without the dust removal opening 10b along the third direction Y is D1, and the length of the first sidewall 11 with the dust removal opening 10b along the third direction Y is D2, where D1 < D2.

The inner surface of the second side wall 12 is not inclined towards the direction of the first welding port 10c, but towards the dust removing port 10b, and after the spark generated by laser welding touches the inclined second side wall 12, the spark can rebound towards the direction of the dust removing port 10b, so that smoke dust and welding slag can be pumped away from the welding cavity 10a through the direct dust removing port 10b, and the dust removing efficiency is improved.

Further, the two first side walls 11 are disposed obliquely with respect to the second direction Z, and the inner surfaces of the two first side walls 11 face the first welding hole 10c, the inner surfaces of the second side walls 12 do not face the first welding hole 10c, the dust removing hole 10b is disposed on only one first side wall 11, and the inclination angle of the first side wall 11 without the dust removing hole 10b is larger than the inclination angle of the first side wall 11 with the dust removing hole 10b.

Fig. 9 is a schematic structural view of a dust hood according to still other embodiments of the present application. As shown in fig. 9, in some embodiments, the dust hood 100 includes a plurality of side panels 10 arranged in sequence. The plurality of side frames 10 may be sequentially connected in the third direction Y. If the first side 20a of the battery unit 20 has a plurality of first welding spots a, the second side 20B of the battery unit 20 has a plurality of second welding spots B, a dust hood 100 can be placed at the upper end of the first side 20a of the battery unit 20, the plurality of side walls 10 are in one-to-one correspondence with the plurality of first welding spots a, and the periphery of each first welding spot a is surrounded by the side wall 10, so that dust can be removed from the plurality of first welding spots a at the same time. The other dust hood 100 is placed at the upper end of the second side 20B of the battery unit 20, the side walls 10 are in one-to-one correspondence with the second welding spots B, and the periphery of each second welding spot B is surrounded by the side walls 10, so that dust removal can be performed on the second welding spots B at the same time.

The dust excluding hood 100 can remove dust by welding a plurality of welding spots simultaneously, so that the production efficiency is improved.

In some embodiments, the dust hood 100 has a hollow structure 13 between adjacent side walls 10, which reduces the weight of the dust hood 100 and facilitates the lightweight design of the dust hood 100.

In some embodiments, at least a portion of side gusset 10 is inclined at an angle of 10 ° to 20 ° relative to second direction Z. If the inclination angle is too small, the rebound angle is also small, and the rebounded spark easily falls down to the surface of the object to be welded. If the inclination angle is too large, the spark may bounce to a region farther from the dust removing port 10b, and be less likely to be drawn away from the dust removing port 10b.

In the above scheme, the range of the inclination angle of the side wall 10 relative to the second direction Z is moderate, so that the spark generated by laser welding can rebound in the direction of the first welding port 10c after touching the part, the side wall 10 is not easy to fall in the direction of the second welding port 10d, the inclination angle of the side wall 10 is avoided being too large, the dust and the welding slag can rebound and then be aligned to the dust removing port 10b, and the dust and the welding slag can be conveniently pumped out from the welding cavity 10 a.

In a second aspect, embodiments of the present application provide a laser welding apparatus including a dust cap 100 and a laser welding device for providing laser light that is injected into a welding chamber 10 a.

According to some embodiments of the present application, a dust hood 100 is provided, including a side wall 10 enclosing a welding cavity 10a, the side wall 10 is provided with a dust removing opening 10b along a first direction X, opposite ends of the side wall 10 along a second direction Z are respectively provided with a first welding opening 10c and a second welding opening 10d, the first welding opening 10c is used for injecting laser, the second welding opening 10d is used for approaching an object to be welded, at least part of the side wall 10 is obliquely arranged relative to the second direction Z, and an inner surface of the side wall 10 faces the first welding opening 10c; wherein the first direction X and the second direction Z are arranged in an intersecting manner. The side wall 10 comprises two first side walls 11 oppositely arranged along a first direction X and two second side walls 12 oppositely arranged along a third direction Y, wherein the first side walls 11 are connected with the second side walls 12, at least one of the two first side walls 11 is obliquely arranged relative to a second direction Z, and the inner surface of the side wall is towards the first welding port 10c; wherein the first direction X and the third direction Y are disposed to intersect. The dust removing opening 10b is formed in one of the two first side walls 11.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (14)

1. The dust hood is characterized by comprising a side wall which surrounds and forms a welding cavity, wherein a dust removing opening is formed in the side wall along a first direction, a first welding opening and a second welding opening are respectively formed at two opposite ends of the side wall along a second direction, the first welding opening is used for laser injection, the second welding opening is used for being close to an object to be welded, at least part of the side wall is obliquely arranged relative to the second direction, and the inner surface of the side wall faces the first welding opening;

wherein the first direction and the second direction are arranged in an intersecting manner.

2. The dust hood according to claim 1, wherein the side wall includes two first side walls disposed opposite to each other in a first direction and two second side walls disposed opposite to each other in a third direction, the first side walls being connected to the second side walls, at least one of the two first side walls being disposed obliquely to the second direction with an inner surface thereof facing the first welding port;

wherein the first direction and the third direction are arranged to intersect.

3. The dust hood according to claim 2, wherein the dust removal port is provided in one of the two first side walls.

4. A dust hood according to claim 3, wherein the edge of the dust removal opening is located adjacent to the edge of the first side wall.

5. The dust hood of claim 2 further comprising a dust tube connected to a side of the side wall having a dust port, the dust tube communicating with the weld chamber through the dust port.

6. The dust hood of claim 5, wherein the dust removal tube includes a first tube disposed along an edge of the dust removal port, the first tube extending obliquely in a direction proximate the first weld port.

7. The dust hood of claim 6, wherein the dust removal tube further comprises a second tube body comprising a first section and a second section connected in sequence, the first section being connected to the first tube body, the second section being bent and extended in a direction away from the side wall.

8. The dust hood according to claim 5, wherein the dust removal pipe is provided with a tuyere.

9. The dust hood according to claim 2, wherein at least one of the two second side walls is disposed obliquely to the second direction with its inner surface facing the first weld opening.

10. The dust hood according to claim 2, wherein the cross section of the side wall is trapezoidal, the length of the first side wall along the third direction, in which the dust removal opening is not provided, is D1, and the length of the first side wall along the third direction, in which the dust removal opening is provided, is D2, wherein D1 < D2.

11. The dust hood according to any one of claims 1 to 10, wherein the dust hood comprises a plurality of side walls which are arranged in sequence.

12. The dust hood of claim 11 wherein said dust hood is hollow between adjacent ones of said side panels.

13. The dust hood according to any one of claims 1 to 10, wherein at least part of the side walls are inclined at an angle of 10 ° to 20 ° with respect to the second direction.

14. A laser welding apparatus, comprising:

the dust hood of any one of claims 1 to 13; the method comprises the steps of,

and the laser welding device is used for providing laser which is injected into the welding cavity.

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