CN218135687U

CN218135687U - Gas protection device for laser welding of nickel plate

Info

Publication number: CN218135687U
Application number: CN202222197675.2U
Authority: CN
Inventors: 张华夏; 吴让大; 程德志; 李银华; 李坤; 付伟
Original assignee: Pentium Laser Wuhan Co ltd
Current assignee: Pentium Laser Zhejiang Co ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-12-27
Anticipated expiration: 2032-08-19

Abstract

The utility model discloses a gas protection device for nickel plate laser welding, it includes bottom plate and protection gas spout piece, and the bottom plate has seted up the air channel, and one side of bottom plate has seted up the inlet channel who communicates with the air channel, and the opposite side has seted up the air outlet channel who communicates with the air channel, and the bottom plate is used for supplying the nickel board to place, and the air channel is used for protecting the welding seam of nickel board bottom; the welding chamber has been seted up to the protection gas spout piece, and the welding mouth with the welding chamber intercommunication is seted up in the bottom in welding chamber to the protection gas spout piece, and the laser mouth with the welding chamber intercommunication is seted up at the top in welding chamber to the protection gas spout piece, and the first air inlet with the welding chamber intercommunication is seted up to the outer wall of protection gas spout piece, and the protection gas spout piece is used for protecting the welding seam at nickel plate top. To sum up, the above technical scheme has the following beneficial effects: protective gas enters the vent groove and the first gas inlet into the welding cavity from the gas inlet channel respectively, so that the generation of welding seam gas holes and the oxidation of the surface of a welding seam are avoided when the nickel plate is welded.

Description

Gas protection device for laser welding of nickel plate

Technical Field

The utility model relates to a frock clamp technical field, more specifically say, it relates to a gas protection device for nickel plate laser welding.

Background

Because nickel or nickel alloy has good plasticity and corrosion resistance, such as strong alkali corrosion resistance, the nickel or nickel alloy is widely applied to the fields of industrial alkali preparation, seawater desalination, petrochemical industry, nuclear industry and the like. However, because of the low thermal conductivity of nickel or nickel alloy, it is very easy to generate coarse crystal defects during the welding process of nickel or nickel alloy; in addition, due to high temperature in the welding process, oxygen, hydrogen or carbon dioxide and other gases in the air are easily absorbed, so that the pore defects are generated. To avoid these defects, the prior art uses an inert gas such as helium or argon to provide a welding protective atmosphere, or welds under vacuum conditions. However, the vacuum condition is too costly and the size of the welded workpiece is limited. Therefore, how to avoid the generation of pores in the welding seam when the nickel or the nickel alloy is welded is the technical problem to be solved by the application.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the gas protection device for the laser welding of the nickel plate is provided, and the gas protection device can provide gas protection for the front side and the back side of the welding line of the plate, so that the generation of the air hole of the welding line during welding is avoided.

In order to realize the purpose, the following technical scheme is provided:

a gas protection device for nickel plate laser welding comprises a bottom plate and a protective gas spraying block, wherein the bottom plate is provided with a vent groove, one side of the bottom plate is provided with a gas inlet channel communicated with the vent groove, the other side of the bottom plate is provided with a gas outlet channel communicated with the vent groove, the bottom plate is used for placing a nickel plate, and the vent groove is used for protecting a welding seam at the bottom of the nickel plate;

the welding chamber has been seted up to the protection gas spout piece, and the welding mouth with the welding chamber intercommunication is seted up in the bottom in welding chamber to the protection gas spout piece, and the laser mouth with the welding chamber intercommunication is seted up at the top in welding chamber to the protection gas spout piece, and the first air inlet with the welding chamber intercommunication is seted up to the outer wall of protection gas spout piece, and the protection gas spout piece is used for protecting the welding seam at nickel plate top.

To sum up, the technical scheme has the following beneficial effects: the transverse gas inlet channel is used for supplying protective gas to the vent groove, the vent groove is used for supplying the protective gas to be contacted with the welding seam at the bottom of the nickel plate, and the gas outlet channel is used for discharging the protective gas in the vent groove; the welding port is used for covering a welding area at the top of the nickel plate, the first gas inlet is used for enabling protective gas to enter the welding cavity, and the laser port is used for enabling laser to be injected into a welding seam covered by the welding port. Protective gas enters the vent groove and the first gas inlet into the welding cavity from the gas inlet channel respectively, so that the generation of welding seam gas holes and the oxidation of the surface of a welding seam are avoided when the nickel plate is welded. During the use, place the nickel board that needs the welded on the bottom plate, the welding seam is located the air channel top, and first air inlet is connected with the connecting pipe, and connecting pipe and laser head are connected, and the laser head welds the welding seam that the welding seam covers through laser mouth transmission laser beam, and when the laser beam removed the welding seam and weld along the direction that the welding seam extended, the connecting pipe drove the protection gas nozzle block and removed along the welding seam together to keep the relative position of laser head and laser mouth unchangeable.

Drawings

FIG. 1 is a schematic view of a base plate of a gas shield apparatus for laser welding of nickel plates;

FIG. 2 is a schematic cross-sectional view of a base plate of a gas shield apparatus for laser welding of nickel plates;

FIG. 3 is a schematic view of a shielding gas-jet block of a gas-shield apparatus for laser welding of nickel plates;

fig. 4 is a schematic sectional view of a shielding gas block of a gas shield apparatus for laser welding of nickel plates.

Reference numerals: 1. a nickel plate; 2. a laser beam; 10. a base plate; 11. a vent channel; 12. an air intake passage; 13. an air outlet channel; 20. a shielding gas spray block; 21. a welding cavity; 22. welding the opening; 23. a laser port; 24. a first air inlet; 25. a protection cavity; 26. protecting the mouth; 27. a second air inlet; 30. cooling the block; 31. a cooling chamber; 32. a cooling inlet; 33. a cooling outlet; 40. a baffle plate; 50. and (4) connecting the pipes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front", "back", "left", "right", "upper" and "lower" refer to directions in the drawings, and the terms "bottom" and "top", "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1 and 2, a gas protection device for laser welding of a nickel plate 1 comprises a bottom plate 10 and a protective gas spraying block 20, wherein the bottom plate 10 is provided with a vent groove 11, one side of the bottom plate 10 is provided with a gas inlet channel 12 communicated with the vent groove 11, the other side of the bottom plate 10 is provided with a gas outlet channel 13 communicated with the vent groove 11, the bottom plate 10 is used for placing the nickel plate 1, and the vent groove 11 is used for protecting a welding seam at the bottom of the nickel plate 1; welding chamber 21 has been seted up to protection gas spout piece 20, and protection gas spout piece 20 sets up the welding mouth 22 with welding chamber 21 intercommunication in the bottom of welding chamber 21, and protection gas spout piece 20 sets up the laser mouth 23 with welding chamber 21 intercommunication at the top of welding chamber 21, and the first air inlet 24 with welding chamber 21 intercommunication is seted up to the outer wall of protection gas spout piece 20, and protection gas spout piece 20 is used for the welding seam at protection nickel plate 1 top.

The gas inlet channel 12 is used for supplying protective gas to the vent groove 11, the vent groove 11 is used for supplying the protective gas to be contacted with the welding seam at the bottom of the nickel plate 1, and the gas outlet channel 13 is used for discharging the protective gas in the vent groove 11; the welding port 22 is used for covering the welding area on the top of the nickel plate 1, the first gas inlet 24 is used for supplying protective gas into the welding cavity 21, and the laser port 23 is used for supplying laser to the welding seam covered by the welding port 22. The protective gas respectively enters the vent groove 11 from the gas inlet channel 12 and the first gas inlet 24 into the welding cavity 21, thereby avoiding the generation of weld pores and the oxidation of the surface of a weld joint when the nickel plate 1 is welded. During the use, place nickel plate 1 that will need the welding on bottom plate 10, the welding seam is located the air channel 11 top, first air inlet 24 is connected with connecting pipe 50, connecting pipe 50 and laser head are connected, the laser head welds the welding seam that welding seam 22 covered through laser mouth 23 transmission laser beam 2, when laser beam 2 removed the welding seam and weld along the direction that the welding seam extends, connecting pipe 50 drove protective gas and spouts piece 20 and remove along the welding seam together, thereby keep the relative position of laser head and laser mouth 23 unchangeable.

As shown in fig. 3 and 4, the protection gas spray block 20 is further provided with a protection cavity 25, the protection gas spray block 20 is provided with a protection port 26 at the bottom of the protection cavity 25, the protection port being communicated with the protection cavity 25, and the outer wall of the protection gas spray block 20 is provided with a second gas inlet 27 communicated with the protection cavity 25. The protection chamber 25 is located one side of welding chamber 21, and during the welding, protection gas spout piece 20 removes to the direction of welding chamber 21 along protection chamber 25, and after protection chamber 25 let in protective gas through second air inlet 27, protection mouth 26 is used for discharging protective gas to the welding seam after the protection welding is good prevents that the welding seam from combining with the air.

A plurality of protection openings 26 are arranged at the bottom of the protection cavity 25. A plurality of has been seted up to protection mouth 26, and evenly arranges in the bottom of protection chamber 25 for supply protective gas to follow the welding seam contact after a plurality of protection mouth 26 blowout and welding are good uniformly, protection mouth 26 has seted up a plurality of speeds that can increase protective gas exhaust, improves protective gas's utilization ratio, lets protective gas more even discharge from the bottom of protection chamber 25.

The length of the protection cavity 25 is greater than the length of the welding cavity 21. Specifically, the length of the protection cavity 25 in the direction away from the welding cavity 21 is greater than the length of the welding cavity 21 in the direction away from the protector, that is, the length of the welding cavity 21 in the moving direction during welding along the shielding gas nozzle 20 is greater than the length of the protection cavity 25. After the nickel plate 1 is welded, the nickel plate needs to be solidified for a certain time, the length of the protection cavity 25 is lengthened, so that the time existing in the protection gas after the nickel plate 1 is welded can be prolonged, and the welding seam is prevented from being combined with the air.

The protective gas spraying block 20 is provided with a cooling block 30, and the cooling block 30 is provided with a cooling cavity 31, a cooling inlet 32 and a cooling outlet 33 which are communicated with the cooling cavity 31.

The inlet channel 12, the outlet channel 13, the first inlet 24, the second inlet 27, the cooling inlet 32 and the cooling outlet 33 are respectively provided with a connecting pipe 50. The connecting pipe 50 is used for introducing protective gas and is connected with the laser head.

The depth of the vent groove 11 is less than or equal to 30 mm. The deeper the vent groove 11, the more the required protective gas, and by reducing the depth of the vent groove 11, the amount of the protective gas can be reduced, so that the protective effect is better.

A baffle 40 is also included, the baffle 40 being for placement on the base plate 10 and for movement of the shield gas jet 20 within the baffle 40. In order to reduce the air flow, which is caused by the movement of the shielding gas nozzle block 20 during the welding process, and to reduce the air flow, a part of the air enters the weld, the baffle plates 40 are provided on both sides of the shielding gas nozzle block 20

Because the laser welding has great advantages at present, such as high laser welding speed, the protection requirement on the welding seam is improved. The scheme provides a set of gas protection device with double-side protection. Comprises a bottom plate 10, a baffle plate 40 and a protective gas spray block 20. The shielding gas spray block 20 has a water cooling function, the cooling inlet 32 is connected with water flow through the connecting pipe 50, the cooling outlet 33 is connected with water flow through the connecting pipe 50, and the water flow through the cooling block 30 can exchange heat with the shielding gas spray block 20 to prevent the shielding gas spray block 20 from being high in temperature. The shielding gas from the second inlet 27 enters the shielding chamber 25 and then is ejected from the shielding opening 26 at the lower side of the chamber to shield the welded seam after welding and prevent the welded seam from being combined with air. The first gas inlet 24 is communicated with pure argon, the argon from the first gas inlet 24 enters the welding cavity 21, and the part of the protective gas can inhibit plasma generated during welding, so that the welding stability is ensured, and meanwhile, air is prevented from entering a molten pool to cause welding seam oxidation. Wherein the laser beam 2 passes through the laser port 23.

Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The gas protection device for the laser welding of the nickel plate is characterized by comprising a bottom plate (10) and a protective gas spraying block (20), wherein the bottom plate (10) is provided with a vent groove (11), one side of the bottom plate (10) is provided with a gas inlet channel (12) communicated with the vent groove (11), the other side of the bottom plate is provided with a gas outlet channel (13) communicated with the vent groove (11), the bottom plate (10) is used for placing the nickel plate (1), and the vent groove (11) is used for protecting a welding seam at the bottom of the nickel plate (1);

welding chamber (21) have been seted up in protection gas spout piece (20), welding mouth (22) with welding chamber (21) intercommunication are seted up in the bottom in welding chamber (21) to protection gas spout piece (20), laser mouth (23) with welding chamber (21) intercommunication are seted up at the top in welding chamber (21) in protection gas spout piece (20), first air inlet (24) with welding chamber (21) intercommunication are seted up to the outer wall of protection gas spout piece (20), protection gas spout piece (20) are used for the welding seam at protection nickel plate (1) top.

2. The gas protection device for the laser welding of the nickel plates as claimed in claim 1, wherein the protective gas injection block (20) is further provided with a protective cavity (25), the protective gas injection block (20) is provided with a protective port (26) at the bottom of the protective cavity (25) and communicated with the protective cavity (25), and the outer wall of the protective gas injection block (20) is provided with a second gas inlet (27) communicated with the protective cavity (25).

3. The gas shielding device for laser welding of nickel plates as claimed in claim 2, characterized in that the shielding openings (26) at the bottom of the shielding chamber (25) are opened in several numbers.

4. Gas shielding device for laser welding of nickel plates according to claim 3, characterized in that the length of the shielding chamber (25) is greater than the length of the welding chamber (21).

5. The gas shield device for the laser welding of nickel plates as recited in claim 3, wherein a cooling block (30) is disposed on the shield gas injection block (20), the cooling block (30) is opened with a cooling cavity (31), and a cooling inlet (32) and a cooling outlet (33) which are communicated with the cooling cavity (31).

6. The gas shielding device for laser welding of nickel plates according to claim 5, characterized in that connecting pipes (50) are respectively arranged on the gas inlet channel (12), the gas outlet channel (13), the first gas inlet (24), the second gas inlet (27), the cooling inlet (32) and the cooling outlet (33).

7. Gas shielding device for laser welding of nickel plates according to any of claims 1 to 6, characterized in that the depth of the venting groove (11) is equal to or less than 30 mm.

8. The gas shield apparatus for laser welding of nickel plates according to any of claims 1 to 6, further comprising a baffle plate (40), wherein the baffle plate (40) is used for being placed on the base plate (10) and is used for moving the shield gas injection block (20) in the baffle plate (40).