CN220196653U - Laser welding dust collector - Google Patents

Abstract

The utility model discloses a laser welding dust removing device which comprises a body and a protective cover. The body is provided with a cavity for passing laser, a blow hole for blowing air towards the obliquely lower direction based on the first direction is arranged on the body at a position which is lower than the inner part of the cavity, and a suction hole for sucking air towards the obliquely upper direction based on the first direction is arranged on the body at a position which is higher than the inner part of the cavity. The protective cover is arranged above the top cover of the battery, and is accommodated in the cavity in a top view, wherein the side edge of the protective cover is arc-shaped. The laser welding dust removing device can enable the blown protection gas to completely cover the welding position, achieves a better blowing protection effect, does not have dead angles in the diversion cavity, is not easy to accumulate dust in the diversion cavity, reduces dust dissipation, and improves welding quality.

Description

Laser welding dust collector

Technical Field

The utility model relates to the technical field of laser welding, in particular to a laser welding dust removing device.

Background

In the processing of, for example, batteries, laser welding is generally used to achieve a fixed connection of the housing and the top cover of the battery. In the process of carrying out laser welding on the battery, a large amount of smoke dust can be generated at the welding position of the shell and the top cover of the battery, and because the smoke dust temperature is higher and the adhesiveness is very strong, if the smoke dust is not timely removed, smaller smoke dust particles in the smoke dust can be attached to a battery clamp or the battery, so that the battery is polluted, the quality of the battery is further influenced, and the larger smoke dust particles can be adhered to the battery clamp and are difficult to clean, and the quality of the battery can be influenced.

In the prior art, the laser welding protection device can protect the welding position through blowing protection gas, reduces the probability of oxidizing the welding position, and collects dust generated by welding through suction. However, due to the structural design of the laser welding protection device in the prior art, the blown protection gas cannot completely cover the welding position, a better blowing protection effect cannot be achieved, dead angles exist in the diversion cavity, dust is easy to accumulate in the diversion cavity, and dust dissipation is caused, so that the welding quality is affected.

Disclosure of Invention

The present utility model aims to solve, at least to some extent, one of the problems of the prior art. Therefore, the utility model provides the laser welding dust removing device, which can improve the range of welding positions covered by the blown protection gas, achieve a better blowing protection effect, reduce dead angles in the diversion cavity, prevent dust from accumulating in the diversion cavity and reduce dust dissipation.

According to one aspect of the utility model, a laser welding dust removing apparatus includes: a body having a cavity for passing a laser light therethrough,

a blow hole for blowing air obliquely downward based on a first direction is arranged on the body at a position below the interior of the cavity,

an air suction hole for sucking air obliquely upward based on a first direction is formed in the body at an upper position relative to the interior of the cavity;

and the protective cover is arranged above the top cover of the battery, and is accommodated in the cavity in a top view state, wherein the side edge of the protective cover is arc-shaped.

The laser welding dust removing device according to one aspect of the utility model has the following beneficial effects: the range of welding positions covered by the blown protection gas can be improved, a better blowing protection effect is achieved, dead angles in the diversion cavity are reduced, dust is not easy to accumulate in the diversion cavity, and dust dissipation is reduced.

In some embodiments, the gas vent is annular and disposed about the axis of the cavity.

In some embodiments, the plurality of the air blowing holes are arranged in a plurality, and the plurality of the air blowing holes are circumferentially distributed on the body along the cavity.

In some embodiments, the cross-sectional shapes of the gas blowing hole and the gas suction hole in a second direction perpendicular to the first direction are tapered so as to be tapered from one end close to the cavity to one end open away from the cavity.

In some embodiments, an annular air inlet cavity communicated with the air blowing hole is arranged at a position below the body, and the annular air inlet cavity is arranged around the axle center of the cavity;

an annular air outlet cavity communicated with the air suction hole is arranged at the upper position of the body, and the annular air outlet cavity surrounds the axis of the cavity.

In some embodiments, the body comprises:

a substrate;

the first guide plate is overlapped with the substrate, and is arranged above the substrate and fixedly connected with the substrate;

the second guide plate is overlapped with the first guide plate, and is arranged above the first guide plate and fixedly connected with the first guide plate;

the substrate is provided with a first cavity, the first guide plate is provided with a second cavity, the second guide plate is provided with a third cavity, and the first cavity, the second cavity and the third cavity jointly form the cavity.

In some embodiments, the base plate and the first baffle together define the gas-blowing aperture and the annular gas-intake cavity, and the first baffle and the second baffle together define the gas-suction aperture and the annular gas-discharge cavity.

In some embodiments, a first conical surface and a second conical surface are formed on one surface of the substrate, which is close to the first guide plate, a third conical surface and a fourth conical surface are formed on one surface of the first guide plate, which is close to the substrate, the first conical surface and the third conical surface jointly limit the air blowing hole (102), and the second conical surface and the fourth conical surface jointly limit the annular air inlet cavity;

a fifth conical surface is formed on one surface of the first guide plate, which is close to the second guide plate, a sixth conical surface is formed on one surface of the second guide plate, which is close to the first guide plate, and the suction holes are limited by the fifth conical surface and the sixth conical surface.

In some embodiments, an air inlet pipe is connected to one end of the annular air inlet cavity, which is close to the outer surface of the second guide plate, and the protection air is blown into the annular air inlet cavity through the air inlet pipe and then blown out through the air blowing hole;

one end of the annular air outlet cavity, which is close to the outer surface of the first guide plate, is connected with an air outlet pipe, dust and protective gas are sucked into the annular air outlet cavity through the air suction hole, and then are sucked out through the air outlet pipe.

In some embodiments, the plurality of air inlet pipes are arranged at intervals in the circumferential direction of the first guide plate, and are communicated with a negative pressure air source for blowing in protective air into the air inlet pipes;

the air outlet pipes are arranged in a plurality, the air outlet pipes are circumferentially distributed at intervals on the periphery of the second guide plate, and the air outlet pipes are communicated with a negative pressure air source and used for providing suction force for the air outlet pipes.

According to the laser welding dust removing device, the protective gas is blown into the annular air inlet cavity through the air inlet pipe, and the protective gas is blown out to the welding position from the air blowing hole obliquely downwards based on the first direction, so that the welding seam between the top cover and the shell is in a state of being protected by the protective gas, meanwhile, dust generated in the laser welding process is blown up, the blown dust and the protective gas are sucked out through the air suction hole, and the dust and the protective gas are sucked out through the annular air outlet cavity and the air outlet pipe. Because the gas blowing hole sets up downwards based on the first direction is inclined, can improve the scope of the welding position that the shielding gas that blows out can cover, reach better protection effect of blowing, and reduce the dead angle in the water conservancy diversion intracavity, the dust is difficult to accumulate in the water conservancy diversion intracavity, reduces the dust escape.

Drawings

Fig. 1 is a perspective view of a laser welding dust removing device of the present utility model.

Fig. 2 is a top view of a laser welding dust collector.

Fig. 3 is a front view of a laser welding dust removing device.

Fig. 4 is a cross-sectional view at A-A in fig. 3.

Fig. 5 is an enlarged view at a in fig. 4.

Fig. 6 is a schematic diagram showing the flow direction of the shielding gas at A-A in fig. 3.

Fig. 7 is an enlarged view at B in fig. 6.

Reference numerals:

100. a body; 101. a cavity; 102. a blow hole; 103. an air suction hole; 104. an annular air inlet cavity; 105. an annular air outlet cavity; 110. a substrate; 111. a first cavity; 112. a first conical surface; 113. a second conical surface; 120. a first deflector; 121. a second cavity; 122. a third conical surface; 123. a fourth conical surface; 124. a fifth conical surface; 130. a second deflector; 131. a third cavity; 132. a sixth conical surface; 140. an air inlet pipe; 150. an air outlet pipe; 200. a protective cover; 300. a battery; 301. a housing; 302. and a top cover.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

The square aluminum shell battery comprises a shell and a top cover, and the shell and the top cover are welded together in a laser welding mode in the processing process of the square aluminum shell battery. In the laser welding process, protection gas is generally blown to the welding position of the shell and the top cover. The following beneficial effects can be brought to the welding position by blowing the shielding gas: 1) The welding seam molten pool can be effectively protected to reduce oxidization, and even can be prevented from being oxidized; 2) Can splash generated in the welding process, and plays a role in protecting a focusing mirror or a protecting mirror; 3) The welding seam molten pool can be uniformly spread when being solidified, so that the welding seam is uniformly and attractive in molding; 4) The shielding effect of metal steam plume or plasma cloud on laser can be effectively reduced, so that the laser energy reaching the surface of a workpiece is increased, and the effective utilization rate of the laser is increased; 5) Can effectively reduce weld seam air holes.

In the process of laser welding the housing and the top cover, a large amount of smoke dust is generated near the welding position, and the smoke dust can form defects such as dust pollution, welding slag and the like at the welding position. Because smoke and dust temperature is higher and the adhesion is very strong, if not in time get rid of the smoke and dust, less smoke and dust granule in the smoke and dust can adhere to battery anchor clamps or battery, causes the pollution to the battery, and then influences the quality of battery, and great smoke and dust granule then can glue to battery anchor clamps and be difficult to clear away, influences welding precision, and then also can influence the quality of battery. Therefore, when the shell and the top cover are subjected to laser welding, the welding position is required to be protected by blowing, so that on one hand, the oxidation of welding seams can be avoided, and on the other hand, generated smoke dust can be taken away, and the welding quality and the performance of a battery are ensured.

In the laser welding dust removing device in the prior art, the air blowing hole is generally perpendicular to the welding line, and the protection gas blown out by the air blowing hole cannot completely cover the welding position, so that a better air blowing protection effect cannot be achieved. And because the protective cover without the top cover or the edge of the protective cover is in a right-angle structure, dead angles exist in the protective gas diversion cavity, and smoke dust or dust generated in the welding process is easy to accumulate in the diversion cavity, so that the dust is scattered and adsorbed around a welding position, and the welding quality is influenced.

Therefore, according to the defects of the laser welding dust removing device in the prior art, the utility model discloses the laser welding dust removing device, which can ensure that the blown protection gas completely covers the welding position to achieve a better blowing protection effect, dead angles do not exist in a flow guide cavity, dust is not easy to accumulate in the flow guide cavity, dust dissipation is reduced, and welding quality is improved.

Referring to fig. 1 to 7, and mainly to fig. 1, 4 and 6, a laser welding dust removing device according to an aspect of the present utility model includes a body 100 and a protective cover 200.

The left-right direction in the figure is a first direction, and the up-down direction in the figure is a second direction.

The body 100 has a cavity 101 through which laser passes, the cavity 101 is located at the center of the body 100, and is a cavity penetrating up and down, and the laser can pass through the cavity 101 of the body 100 to weld the housing 301 and the top cover 302. The body 100 is provided with a gas hole 102 for blowing gas obliquely downward in the first direction, at a position below the inside of the cavity 101, and the body 100 is provided with a gas hole 103 for sucking gas obliquely upward in the first direction, at a position above the inside of the cavity 101. Specifically, during the welding process, the shielding gas is blown out from the gas vent 102 to the welding site to form a shielding gas layer at the welding site to isolate the welding site from air and prevent oxidation of the welding site. The air suction hole 103 can suck air around the axis of the cavity 101, and when dust generated in the welding process passes through the air suction hole 103, the dust can be timely sucked away by the air suction hole 103, so that the dust is prevented from being dissipated into the environment or attached to the battery 300 to influence the quality of the battery 300.

Further, in order to protect the post of the battery 300 from being contaminated by the welding slag during the laser welding, the shielding gas and the dust are simultaneously guided, and the shielding gas mixed with the dust is guided to the suction hole 103. The laser welding dust removing device of the present embodiment further includes a protective cover 200. The protection cover 200 is mounted above the top cover 302 of the battery 300, and the protection cover 200 is accommodated in the cavity 101 in a plan view, wherein side edges of the protection cover 200 are arc-shaped. In order to ensure that there is no dead angle of suction, the side edges of the protective cover 200 are provided in an arc shape, and the dust and the shielding gas are guided so that the shielding gas and the entrained dust blown out from the gas blowing hole 102 can be sucked away by the gas suction hole 103 in a path of arc transition. The dust is prevented from being accumulated at the side edge of the protection cover 200 to cause the dust to escape into the environment and attach to the welding position of the housing 301 and the top cover 302, so that the welding quality is ensured, and the performance of the battery 300 is further ensured.

In addition, the air blowing hole 102 is arranged below the air suction hole 103, so that the air blowing protection effect can be further improved, the contact area between the shielding gas and the welding position is increased, and meanwhile, dust can be blown upwards by the shielding gas, so that the dust can be sucked away by the air suction hole 103 more easily, the dust is prevented from being deposited below under the action of gravity, the welding position of the battery 300 is polluted, and the welding quality is affected.

The laser welding dust removing device according to one aspect of the utility model has the following beneficial effects: the protection gas that can make to blow out covers the welding position completely, reaches better protection effect of blowing, and does not have the dead angle in the water conservancy diversion intracavity, and the dust is difficult to accumulate in the water conservancy diversion intracavity, reduces the dust loss, improves welding quality. Specifically, in the laser welding dust removing apparatus of the present utility model, the shielding gas is blown out from the gas blowing hole 102 obliquely downward based on the first direction to the welding position, so that the weld between the housing 301 and the top cover 302 is in a state of being shielded by the shielding gas, and at the same time, dust generated during the laser welding process is blown up, and the suction hole 103 sucks out the blown-up dust and the shielding gas. Because the air hole 102 is arranged obliquely downwards based on the first direction, the blown protection air can completely cover the welding position, and a better air blowing protection effect is achieved. And because the side edge of the protective cover 200 is arc-shaped, no dead angle exists in the moving path of dust, dust is not easy to accumulate on the side edge of the protective cover 200, the dust collection rate is improved, the dust dissipation can be reduced, and the welding quality is improved.

Referring to fig. 1 and 2, in some embodiments, the gas vent 102 is annular and is disposed about the axis of the cavity 101. Specifically, the air blowing hole 102 may be provided in a ring shape, and the ring-shaped air blowing hole 102 can be matched with the welding position of the housing 301 and the top cover 302, so that the area of the welding position covered by the shielding gas is increased, and a better air flow out effect is ensured.

Further, as for the shape of the cavity 101, it may be specifically set according to the shape of the battery 300. For example, when the battery 300 is a square aluminum case battery 300, the cavity 101 may be provided in a rounded rectangle so that the shape of the cavity 101 matches the shape of the square aluminum case battery 300. Therefore, when the square aluminum-shell battery 300 is inserted into the cavity 101, the distance between the welding position of the square aluminum-shell battery 300 and the inner wall of the cavity 101 is smaller, so that the welding between the shell 301 and the top cover 302 is ensured to be completed under the sufficient protection of the shielding gas, so as to improve the welding quality and further improve the performance of the battery 300.

In some embodiments, the plurality of gas holes 102 are provided, and the plurality of gas holes 102 are circumferentially distributed in the body 100 along the cavity 101. Specifically, besides the above-mentioned configuration of the blowholes 102 to be one and the annular surrounding manner to blow the shielding gas at the welding position, a plurality of blowholes 102 may be provided, and the plurality of blowholes 102 may be uniformly and alternately disposed in the body 100 along the cavity 101 in a circumferential surrounding manner, so as to ensure that the shielding gas blown out from each blowhole 102 is uniformly distributed at the welding position, and ensure the welding quality. It will be appreciated that the air blowing holes 102 may take other suitable shapes or arrangements, and may be specifically selected according to practical needs, which are not limited herein.

Referring to fig. 3, 4, and 5, in some embodiments, the cross-sectional shapes of the gas blowing hole 102 and the gas suction hole 103 in the second direction are tapered in which they become smaller from one end near the cavity to one end far from the cavity. Specifically, the air hole 102 and the air suction hole 103 are both annular, and the cross-sectional shape of the air hole 102 along the second direction is tapered in a flaring shape with a smaller top and a larger bottom, and on the one hand, the air hole 102 is configured to be obliquely downward based on the first direction, so that the air pressure of the shielding gas at the inlet of the air hole 102 can be increased, and the effect of blowing the shielding gas can be improved. On the other hand, the section of the air blowing hole 102 is in a conical shape with a flaring shape with a small upper part and a big lower part along the second direction, so that the flow rate of the shielding gas can be controlled, the energy consumption is saved, the area of the shielding gas covering the welding seam is increased, and the pressure flow rate of the whole circumference of the battery 300 is uniform.

The design of the gas vent 102 is referred to herein as a "Laval nozzle" configuration. The Laval nozzle is an important component of the thrust chamber, the front half part of the nozzle is contracted from large to small to the middle to a narrow throat, the narrow throat is then expanded from small to large to the bottom of the arrow, and the gas in the arrow body flows into the front half part of the nozzle under high pressure, passes through the narrow throat and then escapes from the rear half part. This structure allows the velocity of the air stream to be varied by varying the spray cross-sectional area. The gas flow in the rocket engine moves backwards through the spray pipe under the pressure of the combustion chamber and enters the first stage of the spray pipe. At this stage, the gas movement follows the principle of "the flow velocity is large at a small section and the flow velocity is small at a large section when the fluid moves in the tube", so that the gas flow is continuously accelerated. When the narrow throat is reached, the flow rate has exceeded the sonic velocity. While transonic fluid does not follow the principle of 'large flow rate at small section and small flow rate at large section' when moving, but rather is contrary, the larger the section, the faster the flow rate. In the second stage, the velocity of the gas flow is further accelerated, thus generating a large thrust. The laval nozzle in effect acts as a "flow rate increaser". In this embodiment, the gas vent 102 is provided in a tapered shape with a flaring shape having a small top and a large bottom, so that the flow rate of the shielding gas can be increased, the effect of blowing the shielding gas is improved, the energy is saved, the area of the shielding gas covering the weld joint can be increased, the pressure and the flow rate of the whole circumference of the battery 300 are uniform, and the welding quality is further ensured.

Referring to fig. 4 and 5, in some embodiments, an annular air intake chamber 104 is provided in communication with the air hole 102 at a lower position of the body 100, the annular air intake chamber 104 being disposed around the axis of the cavity 101. An annular air outlet chamber 105 communicating with the air suction hole 103 is provided in an upper position of the body 100, and the annular air outlet chamber 105 is provided around the axis of the cavity 101. Specifically, the annular air inlet cavity 104 is communicated with the air blowing hole 102, the protection air is blown out through the air blowing hole 102 via the annular air inlet cavity 104, the volume of the annular air inlet cavity 104 is larger than that of the air blowing hole 102, the flow rate of the protection air entering the air blowing hole 102 via the annular air inlet cavity 104 can be increased, and the effects of air blowing protection and dust removal are improved. Meanwhile, the area of the shielding gas covering the welding seam can be increased, and the welding quality is improved. The annular air outlet cavity 105 is communicated with the air suction hole 103, dust and shielding gas are sucked into the annular air outlet cavity 105 through the air suction hole 103, and then the dust is guided out and collected through the annular air outlet cavity 105, so that the dust is prevented from escaping to influence the environment.

The air blowing hole 102, the air suction hole 103 and the side edges of the protective cover 200 together limit a flow guiding cavity, and the protective gas blown out by the air blowing hole 102 can be uniformly conducted to the air suction hole 103 through the transition of the flow guiding cavity, so that the air suction hole 103 can uniformly and stably absorb the protective gas and dust around the axis of the cavity 101, and the collection rate of dust is improved.

In addition, the shielding gas can be helium or argon, specifically, in the laser welding process, the common shielding gas mainly comprises nitrogen, helium or argon, but because the nitrogen can chemically react with aluminum alloy and carbon steel at a certain temperature to generate nitride, the brittleness of the welding seam can be improved, the toughness is reduced, and the mechanical property of the welding seam joint can be greatly adversely affected. Since the case 301 of the battery 300 is mostly an aluminum case, helium or argon is used as the shielding gas in the present embodiment in order to avoid the reaction between nitrogen and the aluminum case. Helium gas is minimally ionized, ascending metal vapor generated from a metal molten pool can be quickly expelled, helium is used as a protective gas, plasma can be maximally restrained, and accordingly penetration is increased, and welding speed is improved. In addition, helium gas is light and can escape, so that air holes are not easy to be formed at welding positions, welding quality can be improved, and the performance of the battery 300 is ensured.

Referring to fig. 3 and 4, in some embodiments, the body 100 includes a substrate 110, a first baffle 120, and a second baffle 130. The first baffle 120 and the substrate 110 are overlapped with each other, and the first baffle 120 is disposed above the substrate 110, and the first baffle 120 is fixedly connected with the substrate 110. The second baffle 130 and the first baffle 120 overlap each other, and the second baffle 130 is disposed above the first baffle 120, and the second baffle 130 is fixedly connected to the first baffle 120. The substrate 110 is formed with a first cavity 111, the first baffle 120 is formed with a second cavity 121, the second baffle 130 is formed with a third cavity 131, and the first cavity 111, the second cavity 121, and the third cavity 131 together form the cavity 101. Specifically, in this embodiment, the body 100 may be formed by arranging the substrate 110, the first baffle 120 and the second baffle 130 together, so as to process the substrate 110, the first baffle 120 and the second baffle 130, reduce the production cost and reduce the construction difficulty. In the laser welding process, the shell 301 and the top cover 302 are welded by the laser through the cavity 101 formed by the first cavity 111, the second cavity 121 and the third cavity 131 together, so that welding precision is ensured.

In some embodiments, the base plate 110 and the first baffle 120 cooperate to define the gas-blowing aperture 102 and the annular gas-intake cavity 104, and the first baffle 120 and the second baffle 130 cooperate to define the gas-suction aperture 103 and the annular gas-discharge cavity 105. Specifically, the substrate 110 is disposed below the first baffle 120, the second baffle 130 is disposed above the first baffle 120, and the order of the second baffle 130, the first baffle 120, and the substrate 110 is from top to bottom. The surfaces of the substrate 110 and the first deflector 120, which are close to each other, jointly limit the air blowing hole 102 and the annular air inlet cavity 104, wherein the air blowing hole 102 is communicated with the annular air inlet cavity 104, and the volume of the annular air inlet cavity 104 is larger than that of the air blowing hole 102, so that the flow speed of the protective air blown out by the air blowing hole 102 is increased, and a good air blowing effect is ensured.

Referring to fig. 6 and 7, in some embodiments, a first conical surface 112 and a second conical surface 113 are formed on a surface of the substrate 110 close to the first baffle 120, a third conical surface 122 and a fourth conical surface 123 are formed on a surface of the first baffle 120 close to the substrate 110, the first conical surface 112 and the third conical surface 122 together limit the blowhole 102, and the second conical surface 113 and the fourth conical surface 123 together limit the annular intake cavity 104. A fifth tapered surface 124 is formed on a surface of the first baffle 120 adjacent to the second baffle 130, a sixth tapered surface 132 is formed on a surface of the second baffle 130 adjacent to the first baffle 120, and the fifth tapered surface 124 and the sixth tapered surface 132 together define the air intake hole 103. Due to the arrangement of the above structure, the air blowing hole 102 and the annular air inlet cavity 104 are formed by the limitation of the base plate 110 and the first guide plate 120, the air suction hole 103 and the annular air inlet cavity 104 are formed by the limitation of the first guide plate 120 and the second guide plate 130, so that the air blowing hole is convenient to process, when the internal structure is required to be adjusted, the base plate 110, the first guide plate 120 and the second guide plate 130 can be separately processed, and then the air blowing hole and the annular air inlet cavity 104 are fixed, so that the adjustment of the internal structure can be completed, and the air blowing hole is convenient to process and convenient to maintain. The base plate 110 and the first guide plate 120 and the second guide plate 130 are fixedly connected, and the connection modes can adopt bonding, welding and the like, so that stable connection can be realized, gaps between the base plate 110 and the first guide plate 120 and gaps between the first guide plate 120 and the second guide plate 130 can be sealed, the protection gas can be sucked into the suction holes 103 from the gas blowing holes 102 through the guide cavities, the suction efficiency is improved, the dust collection rate is further improved, and the welding quality is ensured.

In addition, the second conical surface 113 of the substrate 110 and the fourth conical surface 123 of the first baffle 120 together define the annular air inlet chamber 104, and since the second conical surface 113 is a surface inclined downward based on the first direction, the thickness of the substrate 110 can be increased compared to a surface disposed horizontally, and the risk of deformation of the substrate 110 can be reduced.

In addition, the substrate 110 is made of high temperature resistant materials such as red copper, so as to ensure the strength of the substrate 110 and avoid the deformation of the substrate 110 due to heating in the welding process.

Referring to fig. 7, in some embodiments, an air inlet pipe 140 is connected to an end of the annular air inlet chamber 104 near the outer surface of the second baffle 130, and shielding air is blown into the annular air inlet chamber 104 via the air inlet pipe 140 and then blown out via the air blowing holes 102. One end of the annular air outlet cavity 105, which is close to the outer surface of the first guide plate 120, is connected with an air outlet pipe 150, and dust and shielding gas are sucked into the annular air outlet cavity 105 through the air suction hole 103 and then sucked out through the air outlet pipe 150. Specifically, the air inlet pipe 140 is connected with an external air inlet device, the protection air is blown into the annular air inlet cavity 104 through the air inlet pipe 140, then blown out to the welding position through the air blowing hole 102, dust mixed with the protection air is guided to the air suction hole 103 through the guide cavity, sucked out through the annular air outlet cavity 105 through the air outlet pipe 150, and then the dust is collected by the air suction device.

In some embodiments, the air inlet pipe 140 is provided with a plurality of air inlet pipes 140 circumferentially and alternately distributed on the periphery of the first baffle 120, and the air inlet pipe 140 is communicated with a negative pressure air source for blowing the shielding air into the air inlet pipe 140. The air outlet pipes 150 are provided in plurality, the air outlet pipes 150 are circumferentially and alternately distributed on the periphery of the second deflector 130, and the air outlet pipes 150 are communicated with a negative pressure air source and are used for providing suction force for the air outlet pipes 150. Specifically, the shielding gas may be helium or argon, the air inlet device may be a high-pressure steel bottle, the shielding gas is generally contained in the high-pressure steel bottle, and the shielding gas in the high-pressure steel bottle is introduced into the air blowing hole 102 through the air inlet pipe 140 when the high-pressure steel bottle needs to be used. The negative pressure air source connected with the air outlet pipe 150 can be generated by a dust collector, and the dust collector can collect sucked dust while generating negative pressure through a fan to provide suction force for the air outlet pipe 150. The plurality of air inlet pipes are arranged, so that the annular air inlet cavity 104 can be uniformly blown, and the effect of blowing the protective gas is improved. The plurality of air outlet pipes 150 are arranged, so that the air suction holes 103 can uniformly suck air around the axis of the cavity 101, the air suction effect is improved, the dust absorption rate is improved, and the welding quality is further ensured.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. Laser welding dust collector, its characterized in that includes:

a body (100), the body (100) having a cavity (101) for passing a laser light therethrough,

the body (100) is provided with a blow hole (102) for blowing air obliquely downward based on a first direction at a position below the inside of the cavity (101),

an air intake hole (103) for sucking air obliquely upward in a first direction is provided in the body (100) at an upper position relative to the interior of the cavity (101);

and a protective cover (200), wherein the protective cover (200) is mounted above a top cover (302) of the battery (300), and the protective cover (200) is accommodated in the cavity (101) in a top view state, and side edges of the protective cover (200) are arc-shaped.

2. The laser welding dust removal device according to claim 1, wherein the gas vent (102) is annular and is arranged around the axis of the cavity (101).

3. The laser welding dust removal device according to claim 1, wherein a plurality of the gas blowing holes (102) are provided, and the plurality of the gas blowing holes (102) are circumferentially distributed to the body (100) along the cavity (101).

4. A laser welding dust removing device according to claim 2 or 3, characterized in that the cross-sectional shapes of the gas blowing hole (102) and the gas suction hole (103) in a second direction perpendicular to the first direction are tapered so as to become smaller from an end closer to the cavity (101) to an end farther from the cavity (101).

5. The laser welding dust removal device according to claim 4, wherein an annular air inlet cavity (104) communicated with the air blowing hole (102) is arranged at a position below the body (100), and the annular air inlet cavity (104) is arranged around the axis of the cavity (101);

an annular air outlet cavity (105) communicated with the air suction hole (103) is arranged at the upper position of the body (100), and the annular air outlet cavity (105) is arranged around the axis of the cavity (101).

6. The laser welding dust removal device of claim 5, wherein the body (100) includes:

a substrate (110);

the first guide plate (120), the first guide plate (120) and the base plate (110) are overlapped with each other, the first guide plate (120) is arranged above the base plate (110), and the first guide plate (120) is fixedly connected with the base plate (110);

the second guide plate (130), the second guide plate (130) is overlapped with the first guide plate (120), the second guide plate (130) is arranged above the first guide plate (120), and the second guide plate (130) is fixedly connected with the first guide plate (120);

the substrate (110) is formed with a first cavity (111), the first deflector (120) is formed with a second cavity (121), the second deflector (130) is formed with a third cavity (131), and the first cavity (111), the second cavity (121) and the third cavity (131) jointly form the cavity (101).

7. The laser welding dust removal device of claim 6, wherein the base plate (110) and the first baffle (120) together define the gas vent (102) and the annular gas inlet chamber (104), and the first baffle (120) and the second baffle (130) together define the gas vent (103) and the annular gas outlet chamber (105).

8. The laser welding dust removing device according to claim 7, wherein a first conical surface (112) and a second conical surface (113) are formed on one surface of the substrate (110) close to the first guide plate (120), a third conical surface (122) and a fourth conical surface (123) are formed on one surface of the first guide plate (120) close to the substrate (110), the first conical surface (112) and the third conical surface (122) jointly limit the air blowing hole (102), and the second conical surface (113) and the fourth conical surface (123) jointly limit the annular air inlet cavity (104);

a fifth conical surface (124) is formed on one surface of the first guide plate (120) close to the second guide plate (130), a sixth conical surface (132) is formed on one surface of the second guide plate (130) close to the first guide plate (120), and the air suction hole (103) is limited by the fifth conical surface (124) and the sixth conical surface (132).

9. The laser welding dust removing device according to claim 8, wherein one end of the annular air inlet cavity (104) close to the outer surface of the second deflector (130) is connected with an air inlet pipe (140), and shielding air is blown into the annular air inlet cavity (104) through the air inlet pipe (140) and then blown out through the air blowing hole (102);

one end of the annular air outlet cavity (105) close to the outer surface of the first guide plate (120) is connected with an air outlet pipe (150), dust and shielding gas are sucked into the annular air outlet cavity (105) through the air suction holes (103), and then sucked out through the air outlet pipe (150).

10. The laser welding dust removing device according to claim 9, wherein a plurality of air inlet pipes (140) are provided, the plurality of air inlet pipes (140) are circumferentially distributed at intervals on the periphery of the first deflector (120), and the air inlet pipes (140) are communicated with a negative pressure air source for blowing in protective air into the air inlet pipes (140);

the air outlet pipes (150) are arranged in a plurality, the air outlet pipes (150) are circumferentially distributed at intervals on the periphery of the second guide plate (130), and the air outlet pipes (150) are communicated with a negative pressure air source and are used for providing suction force for the air outlet pipes (150).