Welding copper nozzle pressing device

Abstract

The utility model discloses a welding copper nozzle pressing device which comprises a pressing mechanism, a dust extraction mechanism and a shielding gas mechanism, and the pressing mechanism comprises a copper nozzle mounting plate and a copper nozzle assembly arranged below the copper nozzle mounting plate; the copper nozzle assembly comprises a fixing block, a gas circuit connecting block and a pressing block fixedly connected with the gas circuit connecting block from top to bottom, the fixing block is fixedly connected with the copper nozzle mounting plate, and the gas circuit connecting block is slidably connected with the fixing block through an equal-height screw; welding holes which are communicated up and down are formed in corresponding positions of the copper nozzle mounting plate, the fixing block, the gas circuit connecting block and the pressing block; the dust extraction mechanism is used for removing smoke dust in time in the welding process; the shielding gas mechanism ensures that the to-be-welded part is prevented from being polluted by other gases and impurities during welding. By means of the structure, it is guaranteed that the pressing mechanism resets smoothly, the dust extraction effect is good, and the shielding gas blowing flow is monitored in real time so that the optimal welding effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to a welding copper nozzle pressing device. Background Art

[0002] In the process of assembling the power battery module line, one of the important links is the module Busbar welding, that is, welding different battery cells in series and parallel through busbars. The clamping device for the battery cells and busbars is the purpose of the present invention.

[0003] In the prior art, the clamping device used in the welding process often has the following problems: first, poor welding is caused by welding smoke obstruction and shading of welding holes; second, the flow rate of the shielding gas cannot be reasonably controlled, so that the entire welding process cannot be in an inert gas atmosphere, which will also affect the welding yield; third, the clamping mechanism does not rebound and reset smoothly, affecting the efficiency of equipment use. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a welding copper nozzle clamping device, which takes into account the dust extraction and air blowing protection functions under the premise of ensuring optimal welding clamping.

[0005] The technical solution of the utility model is:

[0006] It includes a travel frame A and a pressing mechanism, a dust extraction mechanism and a protective gas mechanism that move with the travel frame A. The pressing mechanism is fixed below the travel frame A and includes a copper nozzle mounting plate and a copper nozzle assembly arranged below the copper nozzle mounting plate.

[0007] The copper nozzle assembly includes a fixed block, an air circuit connection block and a pressing block fixedly connected to the air circuit connection block from top to bottom, the fixed block is fixedly connected to the copper nozzle mounting plate, the air circuit connection block is slidably connected to the fixed block by equal height screws, and the corresponding positions of the copper nozzle mounting plate, the fixed block, the air circuit connection block and the pressing block are provided with welding holes communicating with each other from top to bottom;

[0008] A dust extraction port and an air inlet hole are provided on the welding hole. One side of the dust extraction mechanism is connected to the welding hole through the dust extraction port, and the other side of the dust extraction mechanism is connected to an external dust collector through a dust extraction pipe. The protective gas mechanism is connected to the welding hole through the air inlet hole, and the protective gas mechanism is connected to an external protective gas source through a protective gas pipe.

[0009] Its further technical solution is:

[0010] The top opening and the bottom opening of the welding hole are both circular, and the circular size of the top opening is larger than the circular size of the bottom opening so that the inner surface of the welding hole is in the shape of an inverted cylindrical cone.

[0011] Its further technical solution is:

[0012] The equal height screws are arranged at the four corner points of the fixing block, and four groups of equal height screws are passed through the fixing block and are threadedly connected with the internal thread holes corresponding to the air path connection block.

[0013] Its further technical solution is:

[0014] Oil-free bushings are arranged at four corner points of the fixing block corresponding to the equal height screws.

[0015] Its further technical solution is:

[0016] A spring is sleeved on each set of equal-height screws, and two ends of the spring respectively abut against the lower end surface of the fixing block and the upper end surface of the gas path connecting block.

[0017] Its further technical solution is:

[0018] The dust extraction port is arranged on the gas path connection block and is communicated with the welding hole.

[0019] Its further technical solution is:

[0020] The air inlet through hole is formed on the pressing block and communicated with the welding hole. The air path connecting block is provided with an air inlet extending toward the pressing block, and the air inlet through hole is communicated with the air inlet.

[0021] Its further technical solution is:

[0022] An annular air inlet groove is formed on the upper end surface of the pressing block around the welding hole, and the annular air inlet groove is respectively connected with the air inlet port and the air inlet hole.

[0023] Its further technical solution is:

[0024] The protective air pipe is provided with a digital flow switch.

[0025] Its further technical solution is:

[0026] The copper nozzle assembly is provided with multiple groups and is arranged at intervals below the copper nozzle mounting plate.

[0027] The beneficial technical effects of the utility model are as follows: in the copper nozzle assembly, by arranging oil-free bushings at the four corners of the fixed block, the air path connecting block is slidably connected to the fixed block by means of equi-height screws passing through the oil-free bushings, and a reset spring is sleeved on the equi-height screws to achieve smooth reset of the clamping mechanism; by opening a dust extraction port connected to the welding hole on the air path connecting block, an external dust collector removes welding smoke in the welding hole in time through the dust extraction port; by evenly opening a plurality of groups of air inlet holes connected to the welding holes on the pressing block in an annular direction, and providing a digital flow switch on the protective air pipe, an external protective gas source can reasonably and effectively provide protective gas to the welding hole through the air inlet hole; the structure is compatible with welding clamping, dust extraction and protective gas blowing functions at the same time, and ensures smooth reset of the clamping mechanism, good dust extraction effect, and real-time monitoring of the blowing protective gas flow rate to achieve the best welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the back of the overall structure of the utility model;

[0029] Figure 2 This is a schematic diagram of the copper nozzle installation plate of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the copper nozzle assembly of the utility model;

[0031] Figure 4 It is a cross-sectional schematic diagram of the copper nozzle assembly of the utility model;

[0032] Figure 5 It is a front view schematic diagram of the overall structure of the utility model;

[0033] in:

[0034] A. Travel rack;

[0035] 1. Clamping mechanism; 11. Copper nozzle mounting plate; 111. Receiving groove; 112. Screw groove; 12. Fixing block; 13. Air connection block; 131. Dust extraction port; 132. Air inlet; 14. Pressing block; 141. Air inlet hole; 142. Annular air inlet groove; 15. Equal height screws; 16. Oil-free bushing; 17. Elastic part; 18. Dust extraction pipe; 19. Digital flow switch; 2. Dust extraction mechanism; 3. Shielding gas mechanism; 4. Welding hole. DETAILED DESCRIPTION

[0036] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0037] like Figure 1The utility model provides a welding copper nozzle clamping device, including a travel frame and a clamping mechanism 1, a dust extraction mechanism 2 and a shielding gas mechanism 3 that move with the travel frame. The travel frame cooperates with an external servo mechanism so that the clamping mechanism 1 can clamp the workpiece to be welded before welding; the dust extraction mechanism 2 is connected to an external dust collector to remove smoke and dust in time during welding; the shielding gas mechanism 3 is connected to an external shielding gas source to protect the workpiece to be welded from being contaminated by other gases and impurities during welding.

[0038] like Figures 2 to 3 The clamping mechanism 1 is fixed under the travel frame, and includes a rectangular plate-shaped copper nozzle mounting plate 11 and a copper nozzle assembly arranged under the copper nozzle mounting plate 11. The copper nozzle assembly includes a fixed block 12, an air path connecting block 13 and a pressing block 14 in contact with the workpiece to be welded. The fixed block 12 is fixedly connected to the copper nozzle mounting plate 11 by screws, and the air path connecting block 13 is connected to the fixed block 12 by equal height screws 15. Specifically, the equal height screws 15 are arranged at the four corner points of the fixed block 12, and four groups of equal height screws 15 are penetrated through the fixed block 12 and threadedly connected with the internal threaded holes corresponding to the air path connecting block 13.

[0039] Furthermore, oil-free bushings 16 are provided at four corner points of the fixing block 12 corresponding to the equal-height screws 15 , and the gas path connecting block 13 is slidably connected to the fixing block 12 via the oil-free bushings 16 .

[0040] Further, such as Figure 2 The lower end surface of the copper nozzle mounting plate 11 is provided with a receiving groove 111 for accommodating the fixing block 12, and the receiving groove 111 is also provided with a screw groove 112 for allowing the equal height screw 15 to move up and down.

[0041] Furthermore, each set of equal height screws 15 is sleeved with an elastic member 17. In this embodiment, the elastic member 17 is a spring, and the two ends of the spring respectively abut against the lower end surface of the fixed block and the upper end surface of the gas path connection block. The fixed block 12 and the gas path connection block 13 are provided with spring grooves for accommodating springs on their opposite end surfaces. The compression of the spring provides a clamping force on the pressing block, and the spring also reduces the cold welding caused by the inadequate compression of the copper nozzle assembly during the welding process and the over-voltage damage to the battery cell.

[0042] The pressing block 14 is fixedly connected to the lower end surface of the gas path connecting block 13 by screws.

[0043] In this embodiment, the clamping mechanism 1 is provided with a welding hole 4 communicating with each other from top to bottom, and the welding hole 4 is provided at corresponding positions on the copper nozzle mounting plate 11 , the fixing block 12 , the gas path connecting block 13 and the pressing block 14 .

[0044] The top opening and the bottom opening of the welding hole 3 are both circular, and the circular size of the top opening is larger than the circular size of the bottom opening, so that the inner surface of the welding hole 4 is in the shape of an inverted cylindrical cone from top to bottom to avoid shading during welding.

[0045] Further, such as Figure 4 The bottom of the welding hole 4 extends downward along the pressing block 14 to form an annular flange 5, and the annular flange 5 corresponds to the position where the bar piece and the pole are fitted. During welding, the annular flange 5 is pressed downward to make the bar piece and the pole fit more closely, thereby improving the welding yield rate.

[0046] The dust extraction mechanism 2 is connected to the gas circuit connection block 13. Specifically, a dust extraction port 131 connected to the welding hole 4 is provided on the gas circuit connection block 13. The dust extraction port 131 extends along one side of the gas circuit connection block 13, and is then connected to an external dust collector through a dust extraction pipe 18 fixed on the side of the gas circuit connection block 13 to ensure that welding smoke is discharged during welding to prevent poor welding due to excessive welding smoke.

[0047] The shielding gas mechanism 3 is connected to the other side of the gas circuit connecting block 13. Specifically, an air inlet 132 is provided on the other side of the gas circuit connecting block 13. The air inlet 132 extends to the pressing block 14 through the gas circuit connecting block 13. An annular air inlet groove 142 is provided on the upper end surface of the pressing block 14 around the welding hole 4. The annular air inlet groove 142 is communicated with the air inlet 132. Correspondingly, a plurality of groups of air inlet holes 141 communicated with the annular air inlet groove 142 are evenly arranged in an annular direction on the inner surface of the welding hole 4 located on the pressing block 14, and shielding gas is supplied to the welding hole 4 through the air inlet holes 141.

[0048] The air inlet 132 is connected to an external shielding gas source through a shielding gas pipe to ensure that the welding process is in an inert gas atmosphere, thereby maximizing the yield of laser welding.

[0049] Further, such as Figure 5 The protective gas pipe is provided with a digital flow switch 19 to better control the flow of the protective gas.

[0050] In this embodiment, the copper nozzle assembly is provided with multiple groups, and the multiple groups of copper nozzle assemblies are spaced apart at the lower end of the copper nozzle mounting plate 11 to simultaneously press and weld multiple tabs and poles, thereby reducing the number of pressing times and improving welding efficiency.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A welding copper nozzle clamping device, characterized in that: It comprises a travel frame A and a pressing mechanism (1), a dust extraction mechanism (2) and a protective gas mechanism (3) which move with the travel frame A. The pressing mechanism (1) is fixed below the travel frame A and comprises a copper nozzle mounting plate (11) and a copper nozzle assembly arranged below the copper nozzle mounting plate (11); The copper nozzle assembly comprises, from top to bottom, a fixed block (12), an air path connection block (13), and a pressing block (14) fixedly connected to the air path connection block (13); the fixed block (12) is fixedly connected to the copper nozzle mounting plate (11); the air path connection block (13) is slidably connected to the fixed block (12) via equal height screws (15); and corresponding positions of the copper nozzle mounting plate (11), the fixed block (12), the air path connection block (13), and the pressing block (14) are provided with welding holes (4) communicating with each other from top to bottom; The welding hole (4) is provided with a dust extraction port (131) and an air inlet hole (141); one side of the dust extraction mechanism (2) is connected to the welding hole (4) via the dust extraction port (131); the other side of the dust extraction mechanism (2) is connected to an external dust collector via a dust extraction pipe (18); the protective gas mechanism (3) is connected to the welding hole (4) via the air inlet hole (141); and the protective gas mechanism (3) is connected to an external protective gas source via a protective gas pipe.

2. A welding copper nozzle clamping device according to claim 1, characterized in that: The top opening and the bottom opening of the welding hole (4) are both circular, and the circular size of the top opening is larger than the circular size of the bottom opening so that the inner surface of the welding hole (4) is in the shape of an inverted cylindrical cone.

3. A welding copper nozzle clamping device according to claim 1, characterized in that: The equal height screws (15) are arranged at four corner points of the fixing block (12), and four groups of equal height screws (15) are passed through the fixing block (12) and are threadedly connected to the corresponding internal threaded holes of the gas path connection block (13).

4. A welding copper nozzle clamping device according to claim 3, characterized in that: Oil-free bushings (16) are provided at four corner points on the fixing block (12) corresponding to the equal height screws (15).

5. A welding copper nozzle clamping device according to claim 3, characterized in that: A spring is sleeved on each set of equal height screws (15), and two ends of the spring respectively abut against the lower end surface of the fixing block (12) and the upper end surface of the gas path connecting block (13).

6. A welding copper nozzle clamping device according to claim 1, characterized in that: The dust extraction port (131) is provided on the gas path connection block (13) and is in communication with the welding hole (4).

7. A welding copper nozzle clamping device according to claim 1, characterized in that: The air intake hole (141) is provided on the pressing block (14) and is in communication with the welding hole (4); the air path connection block (13) is provided with an air intake port (132) extending toward the pressing block (14); and the air intake hole (141) is in communication with the air intake port (132).

8. A welding copper nozzle clamping device according to claim 7, characterized in that: An annular air intake groove (142) is provided on the upper end surface of the pressing block (14) around the welding hole (4), and the annular air intake groove (142) is respectively connected to the air inlet (132) and the air intake hole (141).

9. A welding copper nozzle clamping device according to claim 1, characterized in that: The protective air pipe is provided with a digital flow switch (19).

10. A welding copper nozzle clamping device according to claim 1, characterized in that: The copper nozzle components are provided in multiple groups and are arranged at intervals below the copper nozzle mounting plate (11).

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