CN220480544U - Protective gas component for laser welding, pressure regulating device and welding device - Google Patents

Abstract

The utility model relates to a protective gas assembly for laser welding, a pressure regulating device and a welding device, wherein the protective gas assembly comprises a supporting piece, an air knife and a protective gas conveying pipe, the blowing angle and the blowing direction of the protective gas are regulated by regulating the angle around the hinging position of the air knife and the supporting piece to verify the welding effect, the pressure regulating device comprises a cavity chamber, a clamp assembly and the protective gas assembly, the cavity chamber is provided with a light-transmitting plate, the cavity chamber is connected with a pressure measuring device and an exhaust device, the clamp assembly is highly adjustable and is beneficial to regulating the welding focal length on equipment with partial laser emergent height fixed, the air tightness is improved, the air pressure can be regulated between 0.003 and 0.2MPa, a redundant structure is not provided on the basis of meeting the functions of regulating the air pressure and regulating the protective gas direction angle, the pressure regulating device is used on various conventional laser welding equipment, the laser welding device is convenient to realize quick change compared with a glove box, the compatibility is strong, and the cost compression and the operation is simple and reliable when the laser welding process is developed.

Description

Protective gas component for laser welding, pressure regulating device and welding device

Technical Field

The utility model belongs to the field of laser welding, and particularly relates to a shielding gas assembly for laser welding, a pressure regulating device and a welding device.

Background

In the development of laser welding technology, some products need to verify the influence of different air pressures on the welding quality of the products to obtain optimal welding parameters. In the laser welding of partial products, the blowing protection gas is needed to play roles in protecting a focusing lens of a laser welding machine from metal vapor pollution and sputtering of liquid molten drops, dispersing plasma shielding generated by high-power laser welding and the like, but the blowing angle and the blowing direction of a protection gas hole in the prior art are kept unchanged relative to a welding protection gas joint all the time, and the welding effect is verified by being unfavorable for adjusting the blowing angle and the blowing direction of the protection gas.

When verifying the influence of different atmospheric pressure to product welding quality, generally adopt the glove box of laser welding to realize atmospheric pressure adjustable, but special glove box of laser welding exists with high costs, and area is big, and the change of type of different products is troublesome, and it is very troublesome to change the laser instrument of different models, power for verifying the welding effect in the technology development, still need the problem of debugging laser instrument after the change. In the prior art, although a working cabin for accommodating a product to be welded is provided, a welding protection gas joint can emit laser to pass through a light-transmitting lens on the surface of the working cabin to carry out laser welding on an internal welding product, but the defects that clamping of different products is inconvenient, welding focal length is inconvenient to adjust on equipment with fixed laser emergent height, slow mold changing and low compatibility are caused, and the air tightness limits the adjustable range of air pressure are overcome.

Disclosure of Invention

The utility model aims to solve at least one of the technical problems to a certain extent, and provides a protective gas assembly, a pressure regulating device and a welding device for laser welding, which can regulate the blowing angle and direction of protective gas to verify the welding effect, and have the advantages of low cost, portability in replacement, strong compatibility and good air tightness, and are beneficial to the development of laser welding technology.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a laser welding is with protection gas subassembly, includes support piece, at least a set of air knife and protection gas conveyer pipe, the air knife inboard is articulated with support piece, and the air knife is equipped with perpendicular first runner and the second runner of intercommunication, first runner is equipped with to air knife outside open-ended gas outlet, the import of second runner links to each other with the protection gas conveyer pipe.

Further, the support piece is provided with two symmetrical first L-shaped pieces, the air knife comprises two symmetrical second L-shaped pieces, and a locking bolt is arranged between the second L-shaped pieces and the first L-shaped pieces.

Further, the air knife comprises an upper cover and a base which are connected, the upper cover is provided with a notch, the notch is opened to the outer side of the upper cover to form a flat air outlet, a first flow passage is formed between the notch and the base and is opened to the base, and a second flow passage is arranged on the base.

Further, the support piece is provided with a first protective gas connector, an inlet of the second runner is connected with a second protective gas connector, and the protective gas conveying pipe is a hose, and two ends of the protective gas conveying pipe are respectively connected with the first protective gas connector and the second protective gas connector.

The utility model provides a pressure regulating device for laser welding, includes cavity room, anchor clamps subassembly and as above protection gas subassembly, the cavity room can be opened and close, and the cavity room is equipped with the light-passing board, and cavity room lateral wall is as support piece, and the cavity room is connected with pressure measuring device and exhaust apparatus, anchor clamps subassembly and air knife are located the cavity inside.

Further, the cavity room includes cavity bottom plate and a plurality of cavity curb plate, the cavity bottom plate links to each other with a plurality of cavity curb plate bottoms, and a plurality of cavity curb plate lateral parts interconnect, all are equipped with the sealant between cavity bottom plate and the cavity curb plate, between the adjacent cavity curb plate, are equipped with first silicone rubber pad between a plurality of cavity curb plates and the printing opacity board.

Further, the air knives and the protective gas conveying pipes are provided with a plurality of groups and are respectively distributed around the cavity chamber, and the clamp assembly is positioned at the centers of the plurality of groups of air knives.

Further, the fixture assembly comprises a mounting bottom plate, a sliding block and a waist-shaped hole are formed in the mounting bottom plate, the cavity chamber comprises a cavity base, a sliding groove and a mounting hole are formed in the cavity base, the sliding groove is in sliding fit with the sliding block in the vertical direction, and the waist-shaped hole corresponds to the mounting hole.

Further, the fixture assembly comprises a fixture bottom plate and a fixture pressing plate which are detachably connected, the fixture bottom plate is connected with the mounting bottom plate, the fixture bottom plate is provided with a die cavity, and the fixture pressing plate is provided with a through hole corresponding to the die cavity.

Further, the pressure measuring device comprises a digital display pressure gauge, the exhaust device comprises a vacuum pump, the cavity chamber is provided with a pressure gauge connector and a vacuum pump air pipe connector, the pressure gauge connector is connected with the digital display pressure gauge, the vacuum pump air pipe connector is connected with the vacuum pump, and a second silicone rubber pad is arranged between the vacuum pump air pipe connector and the cavity chamber.

A laser welding apparatus comprising a pressure regulating device as claimed in any one of the preceding claims and a laser welding mechanism located above the light-transmitting plate.

Compared with the prior art, the utility model has the beneficial effects that:

(1) The shielding gas component adopts shielding gas to flow along the shielding gas conveying pipe, flow is stabilized through the first flow passage and the second flow passage which are vertical to the air knife in a baffling way, products to be welded outside the air knife are blown out from the air outlet, and the blowing angle and the blowing direction of the shielding gas can be adjusted by adjusting the angle around the hinging position of the air knife and the supporting piece so as to verify the welding effect.

(2) The pressure regulating device clamps the product to be welded by adopting the clamp assembly, the clamp assembly slides along the sliding groove through the sliding block, the waist-shaped hole and the mounting hole correspondingly regulate the mounting height, so that the welding focal length can be regulated on the equipment with partial laser emergent height fixed, the clamp assemblies of different products can be replaced conveniently, and compared with a glove box, the quick mold changing is realized conveniently, and the compatibility is strong; meanwhile, the tightness is improved through the sealant and each silicone rubber pad, the pressure inside the cavity chamber can be adjusted between 0.003MPa and 0.2MPa through the pressure measuring device and the exhaust device, and the device has no redundant structure on the basis of meeting the functional basis of adjustable pressure and adjustable direction angle of the shielding gas, so that the occupied space and the cost of the device are greatly reduced.

(3) The pressure regulating device is used for forming the laser welding device on various conventional laser welding equipment, laser of the laser welding mechanism is welded on products through the light-transmitting plate, cost is saved, operation is simplified, the device is portable in replacement, compatibility is high, the problem that a glove box is troublesome in replacing a laser is avoided, the replacement is simple, and replacement and equipment debugging time is shortened.

And further, cost compression and operation are simple and reliable in the process of developing the laser welding process.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of embodiment 1 of the present utility model;

FIG. 2 is a perspective view of an air knife according to example 1 of the present utility model;

FIG. 3 is a perspective view of embodiment 2 of the present utility model;

FIG. 4 is an internal structural view of embodiment 2 of the present utility model;

FIG. 5 is a top view of embodiment 2 of the present utility model;

FIG. 6 is a cross-sectional view in the AA direction of FIG. 5;

FIG. 7 is a disassembled structural view of the clamp assembly of embodiment 2 of the present utility model;

FIG. 8 is a schematic view showing the installation of the installation base plate of embodiment 2 of the present utility model;

FIG. 9 is a structural view of a mounting base plate of embodiment 2 of the present utility model;

fig. 10 is a front view of embodiment 3 of the present utility model;

fig. 11 is a cross-sectional view in BB direction of fig. 10.

The marks in the figure: support 1, air knife 2, first flow channel 201, second flow channel 202, air outlet 203, upper cover 204, base 205, notch 206, second L-shaped member 207;

the protective gas pipeline 3, the first L-shaped piece 4, the locking bolt 5, the first protective gas connector 6 and the second protective gas connector 7;

a cavity chamber 8, a cavity bottom plate 801, a cavity side plate 802, a sealant 803, a first silicone rubber pad 804, a light-transmitting plate 805, a cavity base 806, a sliding chute 8061 and a mounting hole 8062;

the fixture assembly 9, the mounting base plate 901, the slider 9011, the waist-shaped hole 9012, the fixture base plate 902, the positioning pin hole 9021, the die cavity 9022, the fixture pressing plate 903, the through hole 9031 and the connecting hole 9032;

the device comprises a digital display pressure gauge 10, a vacuum pump 11, a pressure gauge joint 12, a vacuum pump air pipe joint 13, a bracket 14, a laser welding mechanism 15, a product 16, a second silicone rubber pad 17 and a third silicone rubber pad 18.

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 and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" or "a number" means two or more, unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1:

as shown in fig. 1-2, in a preferred embodiment of a shielding gas assembly for laser welding according to the present utility model, the shielding gas assembly includes a support member 1, at least one set of air knives 2 and a shielding gas delivery pipe 3, the inner sides of the air knives 2 are hinged to the support member 1, the air knives 2 are provided with a first flow channel 201 and a second flow channel 202 which are vertically communicated, the first flow channel 201 is provided with an air outlet 203 which is opened to the outer side of the air knives 2, and an inlet of the second flow channel 202 is connected with the shielding gas delivery pipe 3.

After the support piece 1 is fixedly installed, when the protection gas is required to be blown in the laser welding of partial products, the protection gas is introduced into the protection gas conveying pipe 3, flows in a baffling manner along the protection gas conveying pipe 3 through the first flow channel 201 and the second flow channel 202 which are vertical to the air knife 2, and is blown out from the air outlet 203 to the products to be welded on the outer side of the air knife 2, so that the protection effect of the laser welding is provided, the angle of the air knife 2 relative to the support piece 1 can be adjusted by hinging the inner side of the air knife 2 with the support piece 1, and then the angle and the direction of an air outlet are changed, so that the welding effect can be verified by adjusting the blowing angle and the direction of the protection gas.

Further, the support member 1 is provided with two symmetrical first L-shaped members 4, the air knife 2 comprises two symmetrical second L-shaped members 207, a locking bolt 5 is arranged between the second L-shaped members 207 and the first L-shaped members 4, the locking bolt 5 comprises a smooth section and a threaded section, after the locking bolt 5 passes through the first L-shaped members 4 and the second L-shaped members 207, the smooth section is matched with the first L-shaped members 4 and the second L-shaped members 207, the threaded section is connected with a nut, after the nut is unscrewed, the angle of the air knife 2 relative to the support member 1 is adjusted, and after the nut is screwed down, the hinged installation of the air knife 2 and the adjustment of the angle around the hinged position of the air knife 2 relative to the support member 1 are conveniently, quickly and simply realized.

Further, the air knife 2 includes an upper cover 204 and a base 205 that are connected, the upper cover 204 and the base 205 can be detachably connected through bolts, the upper cover 204 is provided with a notch 206, the notch 206 opens to the outside of the upper cover 204 to form a flat air outlet 203, the notch 206 opens to the base 205 and forms a first flow channel 201 with the base 205, and the second flow channel 202 is arranged on the base 205, so that the protective gas entering the air knife 2 from the inlet of the second flow channel 202 can uniformly enter the second flow channel 202 after impacting the upper cover 204, and is ejected along the air outlet 203.

Further, be equipped with first protection gas connector 6 on the support piece 1, the access connection of second runner 202 has second protection gas connector 7, protection gas conveyer pipe 3 is the hose and both ends are connected with first protection gas connector 6 and second protection gas connector 7 respectively, and the protection gas in the support piece 1 outside can get into air knife 2 inside through first protection gas connector 6, protection gas conveyer pipe 3 and second protection gas connector 7 in proper order, blows out to support piece 1 inboard, when adjusting the angle of air knife 2 around articulated position, can be through the flexibility that protection gas conveyer pipe 3 is the hose, adaptation angle variation, and simple structure is further convenient for keep protection gas to carry and blow out angle modulation.

Example 2:

as shown in fig. 3-9, in a preferred embodiment of a pressure regulating device for laser welding according to the present utility model, the pressure regulating device includes a cavity chamber 8, a fixture assembly 9, and a shielding gas assembly as described in embodiment 1, where the cavity chamber 8 can be opened and closed, the cavity chamber 8 is provided with a light-transmitting plate 805, a side wall of the cavity chamber 8 is used as a supporting member 1, the cavity chamber 8 is connected with a pressure measuring device and an exhaust device, and the fixture assembly 9 and the air knife 2 are located inside the cavity chamber 8.

As shown in fig. 3-6, further, the cavity chamber 8 includes a cavity bottom plate 801 and a plurality of cavity side plates 802, the cavity bottom plate 801 is connected with the bottoms of the plurality of cavity side plates 802, the sides of the plurality of cavity side plates 802 are connected with each other, sealant 803 is disposed between the cavity bottom plate 801 and the cavity side plates 802 and between adjacent cavity side plates 802, after the cavity bottom plate 801 and the cavity side plates 802 are assembled by screws, glue can be coated at the joint gaps, after the glue is cooled, the sealant 803 is formed, the tightness of the cavity bottom plate 801 and the cavity side plates 802 is improved, a first silicone rubber pad 804 is disposed between the plurality of cavity side plates 802 and the light-transmitting plate 805, the top of the light-transmitting plate 805 and the cavity side plates 802 can be detachably connected by screws, the opening and closing of the cavity chamber 8 is achieved, the shore hardness of the first silicone rubber pad 804 is preferably 35-45, the tightness of the installation of the light-transmitting plate 805 can be improved by the first silicone rubber pad 804, and the air pressure adjustable range can be increased by the air tightness.

Further, the cavity chamber 8 is preferably made of aluminum alloy, and the cavity bottom plate 801 and the cavity side plate 802 are good in strength and convenient to glue, and the size of the cavity chamber 8 is preferably 0.25m 0.21m 0.15m.

Further, the light-transmitting plate 805 is made of tempered glass with a light transmittance of more than 95%, and has high hardness and light transmittance, so that the laser welding is facilitated.

Further, the air knives 2 and the protective gas conveying pipe 3 are provided with a plurality of groups and are respectively distributed around the cavity chamber 8, the clamp assembly 9 is positioned at the centers of the air knives 2 of the plurality of groups, the air knives 2 are detachably connected with the cavity chamber 8, a protective gas pipeline connected with a plug or the second protective gas connector 7 is provided with a valve, if the protective gas is not needed in the product laser welding, the air knives 2 can be dismantled, the plug or the valve is closed at the second protective gas connector 7 so as to keep the tightness of the cavity chamber 8, if the protective gas is needed in the product laser welding, the surrounding air knives 2 can be opened as required, and the protective gas is blown to the product to be welded on the clamp assembly 9, so that the application is more flexible, and the clamp assembly is applicable to products with the size of 120mm by 50mm by 30 mm.

As shown in fig. 7-9, further, the fixture assembly 9 includes a mounting base 901, a slider 9011 and a waist-shaped hole 9012 are provided on the mounting base 901, the cavity chamber 8 includes a cavity base 806, a chute 8061 and a mounting hole 8062 are provided on the cavity base 806, the chute 8061 is slidingly matched with the slider 9011 in the vertical direction, the waist-shaped hole 9012 corresponds to the mounting hole 8062, the mounting height can be adjusted by sliding the slider 9011 along the chute 8061 when the fixture assembly 9 is mounted, and a screw is used to pass through the waist-shaped hole 9012 to connect the mounting hole 8062, so as to connect the cavity base 806 with the cavity base 806, the adjustment range is preferably within 40mm, and the welding focal length can be adjusted on a device with a fixed laser light emitting height.

Further, the clamp assembly 9 includes a clamp bottom plate 902 and a clamp pressing plate 903 which are detachably connected, the clamp bottom plate 902 is connected with the mounting bottom plate 901, corresponding positioning pin holes 9021 are formed in the clamp bottom plate 902 and the mounting bottom plate 901, a die cavity 9022 is formed in the clamp bottom plate 902, a through hole 9031 corresponding to the die cavity 9022 is formed in the clamp pressing plate 903, the die cavity 9022 can be matched with the shape of a product to be welded, corresponding connecting holes 9032 are formed in the clamp pressing plate 903 and the clamp bottom plate 902, after the product to be welded is placed in the die cavity 9022 of the clamp bottom plate 902, the clamp pressing plate 903 can be placed above the clamp bottom plate 902 and the product to be welded, the clamp pressing plate 903 and the clamp bottom plate 902 are connected through the connecting holes 9032 by screws, clamping of the product to be welded is achieved, the clamp assembly 9 is simple in structure, different products can be replaced conveniently, rapid mold replacement is achieved, and compatibility is strong.

Further, the pressure measuring device comprises a digital display pressure gauge 10, the exhaust device comprises a vacuum pump 11, the cavity chamber 8 is provided with a pressure gauge connector 12 and a vacuum pump air pipe connector 13, the pressure gauge connector 12 is connected with the digital display pressure gauge 10 through a pipeline, a bracket 14 for installing the digital display pressure gauge 10 is arranged on the outer side of the cavity chamber 8, the pressure value in the cavity chamber 8 can be displayed through the digital display pressure gauge 10, the vacuum pump air pipe connector 13 is connected with the vacuum pump 11, the vacuum pump air pipe connector 13 is in threaded connection with the cavity chamber 8 and is provided with a second silicone rubber pad 17, the Shore hardness of the second silicone rubber pad 17 is preferably between 35 and 45, the air tightness is further improved, and the pressure in the cavity chamber 8 is convenient to adjust by the vacuumizing operation.

The assembly and pressure regulating working principle of the pressure regulating device is as follows:

the cavity bottom plate 801 and the cavity side plate 802 are assembled, the vacuum pump air pipe joint 13 and the cavity side plate 802 are locked through threads, the air tightness is guaranteed through the second silicon rubber pad 17, the digital display pressure gauge 10 is installed on the outer side of the cavity side plate 802 through the support 14, the pressure gauge joint 12 and the cavity side plate 802 are connected, the air knife 2 is connected on the inner side of the cavity side plate 802, and the protection air assembly, the pressure measuring device and the exhaust device are assembled through the connecting pipe.

The product to be welded is arranged in the clamp assembly 9, the fixed height of the clamp assembly 9 is adjusted to ensure the position accuracy of the product, the first silicon rubber pad 804 is placed, the top of the toughened glass and the top of the cavity side plate 802 are locked, the power and the working mode of the vacuum pump 11 are adjusted, the air in the cavity chamber 8 is pumped out through the vacuum pump 11, and the air pressure in the device can be adjusted between 0.003MPa and 0.2 MPa.

On the basis of meeting the functions of adjustable air pressure and adjustable direction angle of the shielding gas, the device has no redundant structure, so that the occupied space and cost of the device are greatly reduced, and the cost compression and the operation are simple and reliable when the laser welding process is developed.

Example 3:

as shown in fig. 10-11, in a preferred embodiment of a laser welding apparatus according to the present utility model, the laser welding apparatus includes a pressure regulating device as described in embodiment 2 and a laser welding mechanism 15 located above the light-transmitting plate 805, so that the cost is low, and the pressure regulating device can be used in various conventional laser welding apparatuses in a compatible manner, thereby avoiding the problem of troublesome replacement of the laser in the glove box.

Further, the welding table is included, the cavity bottom plate 801 is connected with the welding table through screws, and a third silicon rubber pad 18 is arranged between the screws and the cavity bottom plate 801, so that the pressure regulating device is convenient to seal and fix.

The working principle of the laser welding device is as follows:

after the product to be welded is clamped by the clamp assembly 9, the cavity chamber 8 is sealed, the pressure regulating device is used for regulating the pressure, if the protective gas is required to be blown, the protective gas assembly works, during welding, the laser of the laser welding mechanism 15 is welded on the product through the light-transmitting plate 805, namely toughened glass, after the parameters are recorded after the welding is finished, the pressure regulating device can be removed by loosening the fixing screw of the toughened glass, loosening the fixing screw of the cavity bottom plate 801 and the fixing screw of the equipment, opening the cavity chamber 8, taking out the product, replacing other products to realize quick replacement, and the mould replacement is convenient and quick, so that the working efficiency is greatly improved.

The welding device is beneficial to saving cost, simplifying operation, has strong compatibility, can be used on most welding equipment, has simple type changing and reduces the time for type changing and equipment debugging.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims (10)

1. The utility model provides a protection gas subassembly for laser welding, its characterized in that includes support piece (1), at least a set of air knife (2) and protection gas conveyer pipe (3), air knife (2) inboard is articulated with support piece (1), and air knife (2) are equipped with perpendicular first runner (201) and second runner (202) of intercommunication, first runner (201) are equipped with towards air knife (2) outside open-ended gas outlet (203), the import of second runner (202) links to each other with protection gas conveyer pipe (3).

2. A shielding gas assembly for laser welding according to claim 1, wherein the support member (1) is provided with two symmetrical first L-shaped members (4), the air knife (2) comprises two symmetrical second L-shaped members (207), and a locking bolt (5) is provided between the second L-shaped members (207) and the first L-shaped members (4).

3. The shielding gas assembly for laser welding according to claim 1, wherein the air knife (2) comprises an upper cover (204) and a base (205) which are connected, the upper cover (204) is provided with a notch (206), the notch (206) is opened to the outer side of the upper cover (204) to form a flat air outlet (203), the notch (206) is opened to the base (205) and forms a first runner (201) with the base (205), and the second runner (202) is arranged on the base (205).

4. The shielding gas assembly for laser welding according to claim 1, wherein the support member (1) is provided with a first shielding gas connector (6), the inlet of the second runner (202) is connected with a second shielding gas connector (7), and the shielding gas conveying pipe (3) is in a hose shape, and two ends of the shielding gas conveying pipe are respectively connected with the first shielding gas connector (6) and the second shielding gas connector (7).

5. The utility model provides a pressure regulating device for laser welding, its characterized in that includes cavity room (8), anchor clamps subassembly (9) and the shielding gas subassembly of claim 1, cavity room (8) can open and close, and cavity room (8) are equipped with light-transmitting plate (805), and cavity room (8) lateral wall is as support piece (1), and cavity room (8) are connected with pressure measuring device and exhaust apparatus, anchor clamps subassembly (9) and air knife (2) are located inside cavity room (8).

6. The pressure regulating device for laser welding according to claim 5, wherein the cavity chamber (8) comprises a cavity bottom plate (801) and a plurality of cavity side plates (802), the cavity bottom plate (801) is connected with the bottoms of the cavity side plates (802), the side parts of the cavity side plates (802) are mutually connected, sealant (803) is arranged between the cavity bottom plate (801) and the cavity side plates (802) and between the adjacent cavity side plates (802), and a first silicone rubber pad (804) is arranged between the cavity side plates (802) and the light-transmitting plate (805).

7. The pressure regulating device for laser welding according to claim 5, wherein the air knives (2) and the protective gas conveying pipe (3) are provided with a plurality of groups and are respectively distributed around the cavity chamber (8), and the clamp assembly (9) is positioned at the center of the plurality of groups of air knives (2).

8. The pressure regulating device for laser welding according to claim 5, wherein the clamp assembly (9) comprises a mounting base plate (901), a clamp base plate (902) and a clamp press plate (903) which are detachably connected, a sliding block (9011) and a waist-shaped hole (9012) are arranged on the mounting base plate (901), the cavity chamber (8) comprises a cavity base (806), a sliding groove (8061) and a mounting hole (8062) are arranged on the cavity base (806), the sliding groove (8061) is in sliding fit with the sliding block (9011) in the vertical direction, the waist-shaped hole (9012) corresponds to the mounting hole (8062), the clamp base plate (902) is connected with the mounting base plate (901), a die groove (9022) is arranged on the clamp base plate (902), and a through hole (9031) corresponding to the die groove (9022) is arranged on the clamp press plate (903).

9. The pressure regulating device for laser welding according to claim 5, wherein the pressure measuring device comprises a digital display pressure gauge (10), the exhaust device comprises a vacuum pump (11), the cavity chamber (8) is provided with a pressure gauge joint (12) and a vacuum pump air pipe joint (13), the pressure gauge joint (12) is connected with the digital display pressure gauge (10), the vacuum pump air pipe joint (13) is connected with the vacuum pump (11), and a second silicone rubber pad (17) is arranged between the vacuum pump air pipe joint (13) and the cavity chamber (8).

10. A laser welding device, characterized by comprising a pressure regulating device according to any of claims 5-9 and a laser welding mechanism (15) above the light-transmitting plate (805).