A method for using a protective gas device for laser welding equipment

Abstract

The present application relates to a shielding gas device for laser welding equipment, belonging to the field of laser welding technology. The device comprises an air supply mechanism, a support mechanism, and a diversion mechanism. The air supply mechanism is used to output shielding gas. The support mechanism comprises a connecting plate and two first side plates, the two first side plates being spaced apart, the two ends of the connecting plate being connected to the first ends of the two first side plates, and the connecting plate being used to connect to the air supply mechanism. The diversion mechanism comprises a housing, the two sides of which are slidably connected to the two first side plates, allowing the housing to move vertically relative to the support mechanism. The housing is provided with an air intake structure, which is located at the first end of the housing and is used to connect to the air supply mechanism, allowing shielding gas to flow into the housing. The vertical sliding between the housing and the support mechanism allows the volume of the shielding space between the housing and the support mechanism to be adjusted, thereby adjusting the time it takes for the shielding gas in the shielding space to fill. The present application improves the adjustability of the shielding gas device.

Description

Technical Field

[0001] The present application relates to the field of laser welding technology, and in particular to a protective gas device for laser welding equipment. Background Art

[0002] Laser welding technology plays a vital role in modern industrial manufacturing and is widely used in a variety of fields, including automotive, aerospace, and electronics. This technology uses a high-energy-density laser beam to rapidly melt and solidify materials. This technology offers advantages such as high welding speed, a small heat-affected zone, and minimal deformation, significantly improving production efficiency and product quality.

[0003] However, in practical applications, a key issue facing laser welding is oxidation of the weld seam, which not only affects weld quality but can also lead to reduced weld strength and poor appearance. To prevent oxidation in the weld seam, a shielding gas is typically used during welding. Currently, shielding gas supply systems in related technologies typically use a gas delivery mechanism to supply shielding gas into a hood that is fixedly connected to the welding equipment, allowing the shielding gas within the hood to cover the weld and provide protection.

[0004] However, the shielding gas filling speed within the hood needs to be adjusted under different welding conditions to optimize the shielding effect. For example, when the workpiece is thick and the weld is deep, the shielding gas in the hood needs to be filled quickly to speed up the cooling of the weld. When the workpiece is thin and the weld is shallow, the shielding gas filling time needs to be appropriately extended to reduce the uneven welding caused by excessive cooling of the weld. However, due to the fixed internal space size of the hood and poor adjustability, it is difficult to adapt to the different weld depths of workpieces of different thicknesses after welding, resulting in unsatisfactory shielding effect and thus affecting welding quality.

[0005] The above-mentioned related technologies have the defect that the protective gas device has poor adjustability. Summary of the Invention

[0006] In order to improve the adjustability of a shielding gas device, the present application provides a shielding gas device for laser welding equipment.

[0007] The shielding gas device for laser welding equipment provided in this application adopts the following technical solution:

[0008] A shielding gas device for laser welding equipment is used to enable shielding gas to be distributed around the periphery of the weld after the laser welding equipment welds the workpiece to form a weld, comprising: a gas supply mechanism for outputting shielding gas; a support mechanism, the support mechanism comprising a connecting plate and two first side plates, the two first side plates being arranged at intervals, the two ends of the connecting plate being respectively connected to the first ends of the two first side plates, the connecting plate being used to connect the gas supply mechanism; a diversion mechanism, the diversion mechanism comprising a cover, the two sides of the cover being slidably connected to the two first side plates so that the cover can move vertically relative to the support mechanism, the cover being provided with an air intake structure, the air intake structure being arranged at the first end of the cover, the air intake structure being used to connect the gas supply mechanism so that shielding gas can pass into the cover, the vertical sliding between the cover and the support mechanism makes the volume of the protection space between the cover and the support mechanism adjustable, so as to adjust the filling time of the shielding gas in the protection space.

[0009] By adopting the above technical solution, the supporting mechanism provides support for the diverter mechanism, and the two first side plates are connected by a connecting plate so that the supporting mechanism is an integral structure. The diverter mechanism is sandwiched between the two first side plates, and the size of the protective space between the cover shell and the supporting mechanism above the workpiece can be adjusted by relative sliding between the cover shell and the supporting mechanism. The air supply mechanism transports protective gas into the protective space through the air intake structure, and protects the periphery of the weld by the protective gas to isolate the air, thereby reducing the risk of the weld being rapidly oxidized in the air and affecting the welding effect. Since the cover shell and the supporting mechanism are slidably connected, the volume of the protective space formed by the cover shell and the supporting mechanism can be adjusted, so that the air intake flow rate of the air supply mechanism can be maintained without changing the air intake flow rate. In this case, the filling time of the shielding gas in the cover is adjusted according to the thickness of the workpiece. When the thickness of the workpiece is small, the volume of the shielding space between the cover and the support mechanism is larger, and the filling time of the shielding gas in the shielding space is longer, which can give the weld enough time to cool slowly and reduce the risk of uneven welding due to extreme cooling; when the thickness of the workpiece is large, the volume of the shielding space between the cover and the support mechanism is smaller, and the filling time of the shielding gas in the shielding space is shortened, which helps to accelerate the cooling of the weld by the shielding gas in the shielding space and reduce the problem of increased oxidation risk due to slow cooling. The device can facilitate the welding process of workpieces of different thicknesses by making the volume of the shielding space adjustable.

[0010] Optionally, both of the two first side panels are provided with a sliding groove, the sliding groove extends vertically, and both sides of the cover shell are provided with a slider, and the slider is correspondingly arranged and slidably connected to the sliding groove.

[0011] By adopting the above technical solution, the cover shell and the first side plate can slide via the sliding groove and the slider, which helps to improve the reliability of sliding.

[0012] Optionally, the support mechanism includes two fasteners, and both of the first side panels are provided with fastening holes. The fasteners are arranged corresponding to the fastening holes, and the fasteners are screwed into the fastening holes. The ends of the fasteners are used to tighten the cover shell so that the cover shell is positioned after sliding relative to the first side panels.

[0013] By adopting the above technical solution, the fastener can be positioned after the cover shell and the first side plate slide relative to each other, so that the cover shell will not slide randomly during use, thereby improving stability and reliability.

[0014] Optionally, the diversion mechanism includes a first balancing layer and a second balancing layer both provided with through holes, the first balancing layer is arranged above the second balancing layer, and the through holes of the second balancing layer have a smaller aperture than that of the first balancing layer.

[0015] By adopting the above technical solution, the first uniform layer initially disperses the shielding gas evenly, and the second uniform layer further disperses the shielding gas evenly, which helps to improve the uniformity of the shielding gas in the protection space, thereby optimizing the protection effect on the weld.

[0016] Optionally, the diversion mechanism includes a compression channel, the longitudinal cross-sectional area of ​​the compression channel gradually changes, and the longitudinal cross-sectional area of ​​the compression channel at the first end close to the air supply mechanism is larger than the longitudinal cross-sectional area of ​​the compression channel at the second end away from the air supply mechanism, the first end of the compression channel is used to connect the air supply mechanism, the second end of the cover shell is provided with an air outlet groove, the second end of the compression channel can be aligned with the air outlet groove so that the air outlet groove outputs compressed gas, the air outlet groove is a strip structure, the longitudinal cross-sectional area of ​​the air outlet groove is equal to or smaller than the longitudinal cross-sectional area of ​​the second end of the compression channel, the air outlet groove is provided on one side of the welding head of the laser welding equipment, and the height of the air outlet groove is higher than the height of the welding point.

[0017] By adopting the above technical solution, the gradual change of the compression channel can gradually compress the input shielding gas and output it from the gas outlet slot, thereby spraying to form a compressed gas layer, which helps to form an isolation layer above the welding head of the laser welding equipment, reducing the air around the weld point, thereby helping to optimize the effect of isolating oxygen around the weld and improving the quality of the weld.

[0018] Optionally, the diversion mechanism includes a conveying channel, which is arranged above the first uniform layer, and the conveying channel is arranged below the compression channel. The conveying channel includes a first end and several evenly distributed second ends, and the second ends of several of the conveying channels are connected to the first end of the conveying channel. The first end of the conveying channel is used to connect the air supply mechanism, and the second ends of several of the conveying channels are provided with a one-way valve so that the protective gas can flow out from the second end of the conveying channel.

[0019] By adopting the above technical solution, the protective gas output by the air supply mechanism is input through the first end of the conveying channel and output from several second ends of the conveying channel. The protective gas can be preliminarily diverted through the conveying channel, and the uniformity of the protective gas in the cover is improved through the second ends of several evenly distributed conveying channels, so that the protective gas can be preliminarily diverted before reaching the first uniform layer; the setting of the one-way valve allows the protective gas in the cover to flow only from the first end to the second end of the conveying channel, reducing the risk of reverse flow of the protective gas and improving reliability.

[0020] Optionally, the air intake structure includes an upper air intake and a lower air intake, and the air supply mechanism selectively connects the upper air intake or the lower air intake, the upper air intake includes the first end of the compression channel and the first end of the conveying channel, and the lower air intake is vertically arranged between the conveying channel and the first uniform layer, and the lower air intake is provided with a one-way valve to allow the protective gas to flow from the air supply mechanism into the cover.

[0021] By adopting the above technical solution, as the cover slides, after the cover slides upward into position, the air supply mechanism can be aligned with the lower air inlet, and after the shielding gas enters the cover, it directly passes through the first uniform layer and the second uniform layer to improve uniformity. At this time, the volume of the protection space is large, and the shielding gas filling time is long, which is suitable for weld protection of workpieces with smaller thickness; after the cover slides downward into position, the air supply mechanism can be aligned with the upper air inlet, so that the shielding gas can be respectively delivered to the compression channel and the delivery channel, and then when welding workpieces with larger thickness, on the one hand, by shortening the filling time of the shielding gas, the protection effect of the weld completed by welding is optimized, and on the other hand, the air isolation effect is achieved above the welding head through the air outlet groove, reducing the risk of affecting the welding effect due to oxidation.

[0022] Optionally, the air supply mechanism includes a relatively independent first air inlet and a second air inlet, at least one of the first air inlet and the second air inlet supplies protective gas to the protective space, the diameter of the first air inlet is larger than the diameter of the second air inlet, the first air inlet and the second air inlet can simultaneously cooperate with the lower air inlet, or the first air inlet and the second air inlet can simultaneously cooperate with the upper air inlet, when the first air inlet and the second air inlet simultaneously cooperate with the upper air inlet, the first air inlet cooperates with the first end of the compression channel, and the second air inlet cooperates with the first end of the delivery channel.

[0023] By adopting the above technical solution, when cooperating with the lower air inlet, since the first air inlet and the second air inlet are relatively independent, the shielding gas can be selectively delivered through at least one of the first air inlet and the second air inlet to improve the adjustability of the shielding gas filling time in the protection space, so as to be suitable for use with workpieces of different thicknesses; when cooperating with the upper air inlet, the first air inlet is coordinated with the compression channel and the second air inlet is coordinated with the delivery channel, so that shielding gas can be provided to the completed weld at the same time, and the air outlet groove can spray the compressed shielding gas, which helps to improve the protection effect of the weld of the workpiece with larger thickness, reduce the risk of oxidation during welding and after the weld is completed, and optimize the welding effect.

[0024] Optionally, a shielding mechanism is also included, which is used to cooperate with the laser welding equipment so that the shielding mechanism is arranged around the periphery of the welding point. The shielding mechanism includes a front baffle and two second side panels, the second side panels are arranged corresponding to the first side panels, the first end of the second side panel is connected to the second end of the first side panel, the front baffle is arranged at the second end of the second side panel, and the two ends of the front baffle are respectively connected to the second ends of the two first side panels.

[0025] By adopting the above technical solution, the shielding mechanism is arranged around the periphery of the welding point, which can optimize the isolation effect of the air and the welding effect, and at the same time reduce the safety hazards caused by metal splashing during welding.

[0026] Optionally, a first exhaust portion is provided on the lower side of the second end of the cover shell, and the first exhaust portion can allow the protective gas to flow from the cover shell into the shielding mechanism. A second exhaust portion is provided on the lower side of the first end of the cover shell, and the supporting mechanism is provided with a third exhaust portion. The second exhaust portion cooperates with the third exhaust portion to connect the interior of the cover shell with the external atmosphere.

[0027] By adopting the above technical solution, the first exhaust part can make the protective gas flow to the welding point, so that the welding point has an air isolation effect, thereby optimizing the welding effect; the second exhaust part and the second exhaust part can make the gas in the protective space flow out, thereby improving operational safety.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. The supporting mechanism provides support for the diverter mechanism, and the two first side plates are connected by a connecting plate to form the supporting mechanism as an integral structure. The diverter mechanism is sandwiched between the two first side plates. The size of the protective space between the cover shell and the supporting mechanism above the workpiece can be adjusted by relative sliding between the cover shell and the supporting mechanism. The air supply mechanism delivers protective gas into the protective space through the air intake structure, and the outer periphery of the weld is protected by the protective gas to isolate the air, thereby reducing the risk of the weld being rapidly oxidized in the air and affecting the welding effect. Since the cover shell and the supporting mechanism are slidably connected, the volume of the protective space formed by the cover shell and the supporting mechanism can be adjusted, so that the air intake flow of the air supply mechanism can be adjusted according to the air intake flow. The filling time of the shielding gas in the cover is adjusted according to the thickness of the workpiece. When the thickness of the workpiece is small, the volume of the shielding space between the cover and the support mechanism is larger, and the shielding gas filling time in the shielding space is longer, which can give the weld sufficient time to cool slowly and reduce the risk of uneven welding due to rapid cooling. When the thickness of the workpiece is large, the volume of the shielding space between the cover and the support mechanism is smaller, and the shielding gas filling time in the shielding space is shortened, which helps to accelerate the cooling of the weld by the shielding gas in the shielding space and reduce the problem of increased oxidation risk due to slow cooling. By making the volume of the shielding space adjustable, the device can be easily adapted to the welding process of workpieces of different thicknesses.

[0030] 2. The cover and the first side plate slide together through the sliding groove and the slider, which helps to improve the sliding reliability;

[0031] 3. The fastener can be positioned after the cover and the first side plate slide relative to each other, so that the cover will not slide randomly during use, thereby improving stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of a shielding gas device for laser welding equipment according to an embodiment of the present application.

[0033] Figure 2 Schematic diagram of a cover according to an embodiment of the present application.

[0034] Figure 3 This is a top view of a shielding gas device for laser welding equipment according to an embodiment of the present application.

[0035] Figure 4 yes Figure 3 Cross-section view at AA in the middle.

[0036] Description of reference numerals:

[0037] 1. Air supply mechanism; 11. First air inlet; 12. Second air inlet; 2. Support mechanism; 21. Connecting plate; 211. Third exhaust section; 22. First side panel; 221. Slide; 23. Fastener; 3. Diverter mechanism; 31. Cover; 311. Slider; 312. Air outlet groove; 313. First exhaust section; 314. Second exhaust section; 315. Upper air inlet; 316. Lower air inlet; 32. First equalizing layer; 33. Second equalizing layer; 34. Compression channel; 35. Delivery channel; 36. One-way valve; 4. Shielding mechanism; 41. Front baffle; 42. Second side panel. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1 -Attached Figure 4 The present application is further described in detail. In this embodiment, unless otherwise specified, the terms "connected", "connected" and "fixed" are understood in a broad sense, including fixed connection, detachable connection, connection to form an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through an intermediary, internal connection and interaction between two elements, and can be understood based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. Moreover, in the description of this embodiment, the terms "above", "below", "right", and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise specified, orientation words such as "inside" and "outside" used in this application refer to the outlines of the corresponding components themselves.

[0040] like Figure 1 As shown, the present invention discloses a shielding gas device for laser welding equipment (hereinafter referred to as the "device"). The device includes a gas supply mechanism 1, a support mechanism 2, and a flow distribution mechanism 3. The device is used to distribute shielding gas around the periphery of the weld after the laser welding equipment forms a weld seam on the workpiece.

[0041] The support mechanism 2 includes a connecting plate 21 and two first side plates 22, which are parallel and spaced apart. The two ends of the connecting plate 21 are connected to the first ends of the two first side plates 22, respectively. The connecting plate 21 is used to connect to the air supply mechanism 1. The connecting plate 21 connects the two first side plates 22, forming a single, integrated structure for the support mechanism 2, which provides support for the diversion mechanism 3. The laser welding equipment is connected to the support mechanism 2 or the diversion mechanism 3. The connection structure of the laser welding equipment can use existing structures such as hoop.

[0042] like Figure 1 and Figure 2 As shown, the diverter mechanism 3 includes a cover shell 31, and the two sides of the cover shell 31 are respectively slidably connected to the two first side plates 22, so that the cover shell 31 can move vertically relative to the support mechanism 2. The vertical sliding between the cover shell 31 and the support mechanism 2 makes the volume of the protective space between the cover shell 31 and the support mechanism 2 adjustable, so as to adjust the filling time of the protective gas in the protective space, and thus also facilitate the adjustment of the concentration of the protective gas in the protective space. The diverter mechanism 3 is clamped between the two first side plates 22, and the size of the protective space between the cover shell 31 and the support mechanism 2 above the workpiece can be adjusted through the relative sliding between the cover shell 31 and the support mechanism 2. There can be a certain gap between the first side plate 22 and the cover shell 31, so that high-temperature resistant fireproof cloth can be set on the inner side of the first side plate 22 and the cover shell 31 to ensure safety in use.

[0043] The gas supply mechanism 1 is used to output shielding gas. The housing 31 is provided with an air intake structure, which is located at the first end of the housing 31 and is connected to the gas supply mechanism 1 to allow shielding gas to flow into the housing 31. The gas supply mechanism 1 delivers shielding gas into the shielding space through the air intake structure. The shielding gas protects the periphery of the weld, isolating it from air and reducing the risk of rapid oxidation of the weld in the air, which could affect the welding effect.

[0044] like Figure 1 and Figure 2As shown, due to the sliding connection between the cover 31 and the support mechanism 2, the volume of the protective space formed by the cover 31 and the support mechanism 2 can be adjusted. This allows the shielding gas filling time within the cover 31 to be adjusted according to the thickness of the workpiece without changing the air intake flow rate of the gas supply mechanism 1. Specifically, when the workpiece thickness is relatively small, the cover 31 slides upward, increasing the volume of the protective space between the cover 31 and the support mechanism 2. This allows the shielding gas in the protective space to fill for a longer time, giving the weld seam sufficient time to cool slowly and reducing the risk of uneven welding due to rapid cooling. When the workpiece thickness is relatively large, the weld seam is wide and deep, and the cover 31 slides downward, decreasing the volume of the protective space between the cover 31 and the support mechanism 2. This shortens the shielding gas filling time within the protective space, helping to accelerate the cooling of the weld seam by the shielding gas in the protective space, reducing the risk of increased oxidation due to slow cooling, and also helping to reduce the amount of shielding gas used. By making the volume of the protective space adjustable, this device can be easily adapted to the welding process of workpieces of different thicknesses. It is understandable that when the protective gas fills the protective space, it can provide more reliable protection for the weld of the workpiece below the protective space and improve the anti-oxidation effect.

[0045] Optionally, both first side panels 22 are provided with vertically extending slide grooves 221. Slide blocks 311 are provided on both sides of the cover 31, corresponding to and slidably connected to the slide grooves 221. The cover 31 and first side panels 22 slide together via the slide grooves 221 and slide blocks 311, improving sliding reliability. A handle may be provided on the cover 31 to facilitate sliding movement of the cover 31.

[0046] like Figure 1 、 Figure 2 and Figure 3 As shown, the support mechanism 2 optionally includes two fasteners 23. Both first side plates 22 are provided with horizontally extending fastening holes, and the fasteners 23 are positioned corresponding to the fastening holes. The fasteners 23 may be bolts, and the fastening holes may be threaded holes. The fasteners 23 are threadedly engaged with the fastening holes, and the ends of the fasteners 23 are used to abut against the cover 31, positioning the cover 31 after sliding relative to the first side plates 22. The fasteners 23 can achieve positioning after the cover 31 and the first side plates 22 slide relative to each other, preventing the cover 31 from sliding freely during use, thereby improving stability and reliability.

[0047] Optionally, the device further includes a shielding mechanism 4. The shielding mechanism 4 comprises a front baffle 41 and two second side panels 42. The second side panels 42 are positioned corresponding to the first side panels 22, with the first ends of the second side panels 42 connected to the second ends of the first side panels 22. The front baffle 41 is positioned at the second end of the second side panels 42, with the two ends of the front baffle 41 respectively connected to the second ends of the two first side panels 22. The shielding mechanism 4 is designed to cooperate with the laser welding equipment, so that the shielding mechanism 4 is positioned around the weld point to optimize air isolation and welding quality while reducing safety hazards caused by metal spatter during welding.

[0048] like Figure 1 、 Figure 2 and Figure 4 As shown, optionally, a first exhaust portion 313 is provided on the lower side of the second end of the cover 31. The first exhaust portion 313 can allow the shielding gas to flow from the cover 31 to the inside of the shielding mechanism 4. The first exhaust portion 313 can allow the shielding gas to flow to the welding point, so that the welding point has an air isolation effect, thereby optimizing the welding effect. A second exhaust portion 314 is provided on the lower side of the first end of the cover 31, and a third exhaust portion 211 is provided on the connecting plate 21 of the support mechanism 2. The second exhaust portion 314 cooperates with the third exhaust portion 211 to connect the interior of the cover 31 with the external atmosphere. The second exhaust portion 314 and the second exhaust portion 314 can allow the air and shielding gas in the protection space to flow out, thereby improving operational safety.

[0049] Optionally, the diversion mechanism 3 includes a first equalizing layer 32 and a second equalizing layer 33, both of which are provided with through holes. The first equalizing layer 32 is provided above the second equalizing layer 33, and the through hole diameter of the second equalizing layer 33 is smaller than the through hole diameter of the first equalizing layer 32. The first equalizing layer 32 initially evenly disperses the shielding gas, and the second equalizing layer 33 further evenly disperses the shielding gas, which helps to improve the uniformity of the shielding gas within the protective space, thereby optimizing the protection effect on the weld. The first equalizing layer 32 can be provided with a cavity, and a steel wool can be provided in the cavity to perform a preliminary equalization function; the second equalizing layer 33 can be a copper mesh.

[0050] like Figure 1 、 Figure 2 and Figure 4As shown, the diversion mechanism 3 optionally includes a compression channel 34. The longitudinal cross-sectional area of ​​the compression channel 34 gradually changes along its length, with the longitudinal cross-sectional area of ​​the compression channel 34 at the first end near the air supply mechanism 1 being larger than the longitudinal cross-sectional area of ​​the compression channel 34 at the second end away from the air supply mechanism 1. The first end of the compression channel 34 is connected to the air supply mechanism 1. The second end of the housing 31 is provided with an outlet groove 312. The second end of the compression channel 34 can be aligned with the outlet groove 312, allowing the outlet groove 312 to output compressed gas. The outlet groove 312 is located on one side of the welding head of the laser welding equipment. The height of the outlet groove 312 is higher than the height of the weld point to form an insulating layer above the weld point. The height of the outlet groove 312 can be higher than the height of the top of the front baffle 41 to ensure smooth discharge of compressed gas. The outlet groove 312 is a strip-shaped structure, and the longitudinal cross-sectional area of ​​the outlet groove 312 is equal to or smaller than the longitudinal cross-sectional area of ​​the second end of the compression channel 34. The gradual change of the compression channel 34 can gradually compress the input shielding gas and output it from the gas outlet groove 312, thereby spraying to form a compressed gas layer, which helps to form an isolation layer above the welding head of the laser welding equipment, reduce the air around the weld point, and thus help to optimize the effect of isolating oxygen around the weld and improve the quality of the weld.

[0051] Optionally, the diversion mechanism 3 includes a delivery channel 35, which is located above the first uniform layer 32 and below the compression channel 34. The delivery channel 35 includes a first end and several evenly distributed second ends. The first end of the delivery channel 35 is used to connect to the air supply mechanism 1, and the second ends of the several delivery channels 35 are all connected to the first end of the delivery channel 35. The shielding gas output by the air supply mechanism 1 is input through the first end of the delivery channel 35 and output from the several second ends of the delivery channel 35. The shielding gas can be initially diverted through the delivery channel 35, and the uniformity of the shielding gas in the housing 31 can be improved through the second ends of the several evenly distributed delivery channels 35, so that the shielding gas can be initially diverted before reaching the first uniform layer 32. The second ends of the several delivery channels 35 are each provided with a one-way valve 36, so that the shielding gas can only flow from the first end of the delivery channel 35 to the second end and out of the second end of the delivery channel 35, reducing the risk of reverse flow of the shielding gas and improving reliability. A flow chamber is defined within the delivery channel 35. The upper end of the flow chamber is connected to the first end of the delivery channel 35, while the lower end of the flow chamber is connected to the second ends of several delivery channels 35. Because the compression channel 34 and the delivery channel 35 are disconnected and vertically spaced apart, the volume of the protective space is reduced after the cover 31 descends vertically, shortening the time it takes to fill with protective gas and achieve reliable protection.

[0052] like Figure 1 、 Figure 2 and Figure 4As shown, the air intake structure optionally includes an upper air intake 315 and a lower air intake 316, and the air supply mechanism 1 is selectively connected to the upper air intake 315 or the lower air intake 316. The upper air intake 315 includes the first end of the compression channel 34 and the first end of the delivery channel 35. The lower air intake 316 is vertically arranged between the delivery channel 35 and the first uniform layer 32. The lower air intake 316 is equipped with a one-way valve to prevent the protective gas from flowing only from the air supply mechanism 1 into the housing 31. As the cover shell 31 slides, after the cover shell 31 slides upward into position, the air supply mechanism 1 can be aligned with the lower air inlet 316. After the protective gas enters the cover shell 31, it directly passes through the first uniform layer 32 and the second uniform layer 33 to improve uniformity. At this time, the volume of the protection space is large and the protective gas filling time is long, which is suitable for weld protection of workpieces with smaller thicknesses; after the cover shell 31 slides downward into position, the air supply mechanism 1 can be aligned with the upper air inlet 315, so that the protective gas can be respectively delivered to the compression channel 34 and the delivery channel 35. Then, when welding workpieces with larger thicknesses, on the one hand, by shortening the filling time of the protective gas, the protection effect of the weld completed by welding is optimized. On the other hand, the air outlet groove 312 is used to achieve an air isolation effect above the weld point, reducing the risk of affecting the welding effect due to oxidation.

[0053] like Figure 1 、 Figure 2 and Figure 4 As shown, the air supply mechanism 1 optionally includes a relatively independent first air inlet 11 and a second air inlet 12, at least one of which supplies protective gas to the protective space. The first air inlet 11 and the second air inlet 12 can simultaneously cooperate with the lower air inlet 316, or the first air inlet 11 and the second air inlet 12 can simultaneously cooperate with the upper air inlet 315. When the workpiece is thick, when the first air inlet 11 and the second air inlet 12 simultaneously cooperate with the upper air inlet 315, the first air inlet 11 cooperates with the first end of the compression channel 34, and the second air inlet 12 cooperates with the first end of the delivery channel 35. The diameter of the first air inlet 11 is larger than the diameter of the second air inlet 12. Under normal circumstances, when machining workpieces of relatively thin thickness, shielding gas is delivered only through the second air inlet 12, reducing the problem of uneven welding caused by excessively rapid shielding gas delivery. In this case, the first air inlet 11 serves as a backup air inlet, which can be used alone or in conjunction with the second air inlet 12 to address situations such as failure of the first air inlet 11. It is understood that the air supply mechanism 1 also includes necessary structures for storing and delivering shielding gas, and existing structures can be selected as needed.

[0054] When the air supply mechanism 1 cooperates with the lower air inlet 316, since the first air inlet 11 and the second air inlet 12 are relatively independent, shielding gas can be selectively delivered through at least one of the first air inlet 11 and the second air inlet 12, thereby improving the adjustability of the shielding gas filling time in the protective space, and facilitating its application to workpieces of different thicknesses. When the air supply mechanism 1 cooperates with the upper air inlet 315, the first air inlet 11 cooperates with the compression channel 34, and the second air inlet 12 cooperates with the delivery channel 35, thereby simultaneously providing shielding gas to the completed weld. At the same time, the outlet groove 312 can eject compressed shielding gas, which helps to improve the protection effect on the welds of thicker workpieces, reduce the risk of oxidation during welding and after the weld is completed, and optimize the welding effect. It is understandable that the device also includes necessary structures for connection, support, drive, positioning, sealing, limiting and control functions to enable the device to operate normally; the shape, size, material and number of settings of each part of the device can be determined as needed to achieve the corresponding function.

[0055] The embodiment of the present application is a shielding gas device for laser welding equipment. The implementation principle is as follows: the diverter mechanism 3 is sandwiched between the two first side plates 22. The size of the shielding space between the shielding shell 31 and the support mechanism 2 can be adjusted by relative sliding between the shielding shell 31 and the support mechanism 2 above the workpiece. The air supply mechanism 1 delivers shielding gas into the shielding space through the air intake structure. The shielding gas protects the periphery of the weld to isolate the air and reduce the risk of the weld being rapidly oxidized in the air and affecting the welding effect. Without changing the air intake flow of the air supply mechanism 1, when the thickness of the workpiece is small, the shielding shell 3 is made to The volume of the protective space between the cover 31 and the support mechanism 2 is large, and the filling time of the protective gas in the protective space is long, which can give the weld enough time to cool slowly and reduce the risk of uneven welding due to extreme cooling; when the thickness of the workpiece is large, the volume of the protective space between the cover 31 and the support mechanism 2 is small, and the filling time of the protective gas in the protective space is shortened, which helps to accelerate the cooling of the weld by the protective gas in the protective space and reduce the problem of increased oxidation risk due to too slow cooling speed. The device can be conveniently applied to the welding process of workpieces of different thicknesses by making the volume of the protective space adjustable.

[0056] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for using a shielding gas device for laser welding equipment, comprising: a shielding gas device for laser welding equipment; wherein the shielding gas device for laser welding equipment is used to enable shielding gas to be distributed around the periphery of a weld after the laser welding equipment welds a workpiece to form a weld; and wherein: The protective gas device for laser welding equipment includes: A gas supply mechanism (1), used for outputting protective gas; A support mechanism (2), the support mechanism (2) comprising a connecting plate (21) and two first side plates (22), the two first side plates (22) being spaced apart, the two ends of the connecting plate (21) being respectively connected to the first ends of the two first side plates (22), and the connecting plate (21) being used to connect to the air supply mechanism (1); A diversion mechanism (3), the diversion mechanism (3) includes a cover shell (31), two sides of the cover shell (31) are slidably connected to the two first side plates (22), so that the cover shell (31) can move vertically relative to the support mechanism (2), the cover shell (31) is provided with an air intake structure, the air intake structure is arranged at the first end of the cover shell (31), the air intake structure is used to connect the air supply mechanism (1), so that the protective gas can pass into the cover shell (31), the vertical sliding between the cover shell (31) and the support mechanism (2) makes the volume of the protective space between the cover shell (31) and the support mechanism (2) adjustable, so as to adjust the filling time of the protective gas in the protective space; A gap is provided between the first side plate (22) and the cover shell (31), and a high-temperature resistant fireproof cloth is provided in the gap; The two first side plates (22) are each provided with a slide groove (221), the slide groove (221) extending vertically, and both sides of the cover shell (31) are provided with a slider (311), the slider (311) being arranged correspondingly to the slide groove (221) and being slidably connected; The support mechanism (2) includes two fasteners (23), and the two first side plates (22) are each provided with a fastening hole. The fasteners (23) are arranged corresponding to the fastening holes. The fasteners (23) are screwed into the fastening holes. The ends of the fasteners (23) are used to press against the cover (31) so that the cover (31) is positioned after sliding relative to the first side plate (22). The method for using the protective gas device for laser welding equipment includes: Without changing the air intake flow rate of the air supply mechanism (1), when the thickness of the workpiece is small, the volume of the protective space between the cover shell (31) and the support mechanism (2) is made larger, and the filling time of the protective gas in the protective space is longer, which can give the weld sufficient time to cool slowly; when the thickness of the workpiece is large, the volume of the protective space between the cover shell (31) and the support mechanism (2) is made smaller, and the filling time of the protective gas in the protective space is shortened, which helps to accelerate the cooling of the weld by the protective gas in the protective space. By making the volume of the protective space adjustable, the device can be conveniently applied to the welding process of workpieces of different thicknesses.

2. The method for using the shielding gas device for laser welding equipment according to claim 1, characterized in that: The diversion mechanism (3) comprises a first balancing layer (32) and a second balancing layer (33), both of which are provided with through holes. The first balancing layer (32) is arranged above the second balancing layer (33), and the through hole diameter of the second balancing layer (33) is smaller than the through hole diameter of the first balancing layer (32).

3. The method for using the shielding gas device for laser welding equipment according to claim 2, characterized in that: The diversion mechanism (3) includes a compression channel (34), the longitudinal cross-sectional area of ​​the compression channel (34) gradually changes, the longitudinal cross-sectional area of ​​the first end of the compression channel (34) close to the air supply mechanism (1) is larger than the longitudinal cross-sectional area of ​​the second end of the compression channel (34) away from the air supply mechanism (1), the first end of the compression channel (34) is used to connect to the air supply mechanism (1), the second end of the cover (31) is provided with an air outlet groove (312), the second end of the compression channel (34) can be aligned with the air outlet groove (312), so that the air outlet groove (312) outputs compressed gas, the air outlet groove (312) is a strip-shaped structure, the longitudinal cross-sectional area of ​​the air outlet groove (312) is equal to or smaller than the longitudinal cross-sectional area of ​​the second end of the compression channel (34), the air outlet groove (312) is provided on one side of the welding head of the laser welding equipment, and the height of the air outlet groove (312) is higher than the height of the welding point.

4. The method for using the shielding gas device for laser welding equipment according to claim 3, characterized in that: The diversion mechanism (3) includes a conveying channel (35), the conveying channel (35) is arranged above the first uniform layer (32), the conveying channel (35) is arranged below the compression channel (34), the conveying channel (35) includes a first end and a plurality of evenly distributed second ends, the second ends of the plurality of conveying channels (35) are all connected to the first end of the conveying channel (35), the first end of the conveying channel (35) is used to connect to the air supply mechanism (1), and the second ends of the plurality of conveying channels (35) are all provided with a one-way valve (36) so that the protective gas can flow out from the second end of the conveying channel (35).

5. The method for using the shielding gas device for laser welding equipment according to claim 4, characterized in that: The air intake structure comprises an upper air intake (315) and a lower air intake (316); the air supply mechanism (1) is selectively connected to the upper air intake (315) or the lower air intake (316); the upper air intake (315) comprises a first end of the compression channel (34) and a first end of the delivery channel (35); the lower air intake (316) is vertically arranged between the delivery channel (35) and the first uniform layer (32); the lower air intake (316) is provided with a one-way valve to allow the protective gas to flow from the air supply mechanism (1) into the housing (31).

6. The method for using the shielding gas device for laser welding equipment according to claim 5, characterized in that: The air supply mechanism (1) includes a relatively independent first air inlet (11) and a second air inlet (12), at least one of the first air inlet (11) and the second air inlet (12) supplies protective gas to the protective space, the diameter of the first air inlet (11) is larger than the diameter of the second air inlet (12), the first air inlet (11) and the second air inlet (12) can simultaneously cooperate with the lower air inlet (316), or the first air inlet (11) and the second air inlet (12) can simultaneously cooperate with the upper air inlet (315), when the first air inlet (11) and the second air inlet (12) simultaneously cooperate with the upper air inlet (315), the first air inlet (11) cooperates with the first end of the compression channel (34), and the second air inlet (12) cooperates with the first end of the delivery channel (35).

7. The method for using the shielding gas device for laser welding equipment according to claim 1, characterized in that: The invention also includes a shielding mechanism (4), which is used to cooperate with the laser welding equipment so that the shielding mechanism (4) is arranged around the periphery of the welding point. The shielding mechanism (4) includes a front baffle (41) and two second side panels (42), the second side panels (42) are arranged corresponding to the first side panels (22), the first end of the second side panel (42) is connected to the second end of the first side panel (22), the front baffle (41) is arranged at the second end of the second side panel (42), and the two ends of the front baffle (41) are respectively connected to the second ends of the two first side panels (22).

8. The method for using the shielding gas device for laser welding equipment according to claim 7, characterized in that: A first exhaust portion (313) is provided on the lower side of the second end of the cover shell (31), and the first exhaust portion (313) can allow the protective gas to flow from the cover shell (31) into the shielding mechanism (4). A second exhaust portion (314) is provided on the lower side of the first end of the cover shell (31), and the support mechanism (2) is provided with a third exhaust portion (211). The second exhaust portion (314) cooperates with the third exhaust portion (211) to connect the interior of the cover shell (31) with the external atmosphere.

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