Top cover welding shielding gas flow equalizing device

Abstract

The utility model provides a shielding gas flow equalizing device for top cover welding, relates to the technical field of battery top cover welding, and solves the problems that a protection lens is aggravated in smudginess caused by shielding gas turbulent flow and negative pressure in the existing welding process, and FTY of top cover welding is influenced. The flow equalizing device comprises a flow equalizing ring used for equalizing shielding gas entering the coaxial blowing protection device during welding, the flow equalizing ring is installed at the position, corresponding to an air inlet hole, in the coaxial blowing protection device, a plurality of flow equalizing air holes are formed in the ring wall of the flow equalizing ring, the flow equalizing air holes are distributed in the shape of a sintered net filter element, and the flow equalizing ring is connected with the coaxial blowing protection device. The upper end and the lower end of the flow equalizing ring are symmetrically and fixedly connected with a set of butt joint flange plates used for being in butt joint with the inner wall of the coaxial blowing protection device and the flow equalizing ring, and a flow equalizing ring cavity is formed among the outer wall of the flow equalizing ring, the butt joint flange plates and the inner wall of the coaxial blowing protection device. The welding device has the advantages that uniform flow of shielding gas in the welding process is guaranteed, so that welding is flat and smooth, and the yield of products is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of battery top cover welding, in particular to a top cover welding protective gas flow equalization device. Background Art

[0002] At present, the top cover welding protective gas blowing method is as follows Figure 1-Figure 2 As shown, the airflow of the shielding gas enters through the air inlet, passes through the guide wall 4 upward through the protective lens, and then is filled and blown downward coaxially. This method is likely to produce turbulence and negative pressure, affecting the uniformity of the shielding gas. The turbulence of the shielding gas affects the FTY of the top cover welding, and is likely to produce bumps and pinholes, while the negative pressure will aggravate the dirtiness of the protective lens. Utility Model Content

[0003] The utility model aims to solve the problem that the protective lens is more contaminated due to the turbulence and negative pressure of the protective gas in the existing welding process, thus affecting the FTY of the top cover welding.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A top cover welding protective gas flow equalizing device, characterized in that it includes a flow equalizing ring for equalizing the flow of protective gas entering a coaxial air blowing protective device during welding, the flow equalizing ring is installed at a position corresponding to the air inlet hole in the coaxial air blowing protective device, the ring wall of the flow equalizing ring is provided with a plurality of flow equalizing holes, the flow equalizing holes are distributed in the shape of a sintered mesh filter element, the upper and lower ends of the flow equalizing ring are symmetrically fixedly connected with a group of docking flanges for docking the inner wall of the coaxial air blowing protective device and the flow equalizing ring, and a flow equalizing ring cavity is formed between the outer wall of the flow equalizing ring, the docking flange and the inner wall of the coaxial air blowing protective device.

[0006] A further improvement is that it also includes an installation groove arranged in the coaxial air blowing protection device, a mounting platform is arranged at the bottom of the installation groove, the lower end of the connecting flange is installed on the mounting platform, and the top surface of the upper end of the connecting flange is coplanar with the top surface of the coaxial air blowing protection device.

[0007] A further improvement is that the inner rings of the two butt flanges are welded to the outer peripheral walls of the corresponding ends of the current equalizing ring by laser welding.

[0008] A further improvement is that the flow equalizing ring is cut from a stainless steel sintered mesh filter element.

[0009] A further improvement is that the filtering accuracy of the stainless steel sintered mesh filter element is 200um.

[0010] A further improvement is that the height of the current equalizing ring is 15 mm.

[0011] A further improvement is that the outer diameter of the docking flange is 55 mm.

[0012] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0013] A flow equalizing device is added inside the coaxial air blowing protection device to ensure that the protective gas flows evenly during welding, making the welding smooth and flat, avoiding bumps and pinholes in the top cover welding, and preventing the protective lens from being easily dirty, thereby improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a three-dimensional schematic diagram of an existing welding coaxial air blowing protection device;

[0016] Figure 2 It is a schematic diagram of the internal structure of an existing welding coaxial air blowing protection device;

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the utility model in cooperation with the coaxial air blowing protection device;

[0018] Figure 4 It is a schematic diagram of the internal structure of the utility model in cooperation with the coaxial air blowing protection device;

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 6 It is a front structural schematic diagram of the utility model.

[0021] Explanation of the accompanying reference numerals: coaxial air blowing protection device 1, air inlet 2, flow equalizing device 3, flow equalizing ring 31, flow equalizing air hole 32, docking flange 33, flow equalizing ring cavity 34, guide wall 4, mounting groove 5, mounting platform 6, protective gas flow direction 7. DETAILED DESCRIPTION

[0022] See also Figure 3-Figure 6As shown, the technical solution adopted in this specific embodiment is: a top cover welding shielding gas flow equalizing device, including a flow equalizing ring 31 for equalizing the flow of shielding gas entering the coaxial air blowing protection device 1 during welding, the flow equalizing ring 31 is installed at the position corresponding to the air inlet 2 in the coaxial air blowing protection device 1, and the ring wall of the flow equalizing ring 31 is provided with a plurality of flow equalizing holes 32, and the flow equalizing holes 32 are distributed in the shape of a sintered mesh filter element. The upper and lower ends of the flow equalizing ring 31 are symmetrically fixedly connected with a group of docking flanges 33 for docking the inner wall of the coaxial air blowing protection device 1 and the flow equalizing ring 31, and a flow equalizing ring cavity 34 is formed between the outer wall of the flow equalizing ring 31 and the docking flange 33 as well as the inner wall of the coaxial air blowing protection device 1.

[0023] It also includes a mounting groove 5 arranged in the coaxial air blowing protection device 1, a mounting platform 6 is arranged at the bottom of the mounting groove 5, the lower end of the connecting flange 33 is installed on the mounting platform 6, and the top surface of the upper end of the connecting flange 33 is coplanar with the top surface of the coaxial air blowing protection device 1.

[0024] The inner rings of the two butt flanges 33 are welded to the outer peripheral walls of the corresponding ends of the current equalizing ring 31 by laser welding.

[0025] The flow equalizing ring 31 is cut from a stainless steel sintered mesh filter element.

[0026] Among them, the filtering accuracy of the stainless steel sintered mesh filter element is 200um.

[0027] The height of the current equalizing ring 31 is 15 mm.

[0028] Wherein, the outer diameter of the docking flange 33 is 55 mm.

[0029] The working principle of the utility model is as follows: the guide of the original coaxial air blowing protection device is milled off to form a mounting groove and a mounting platform, and then the 200um stainless steel sintered mesh filter element is cut into a ring with a height of 15mm, which is a flow-equalizing ring, and then two docking flanges with an outer diameter of 55mm are laser spot welded to the upper and lower ends of the outer wall of the flow-equalizing ring, and then the flow-equalizing ring is placed in the mounting groove, and the docking flange at the lower end is installed on the mounting platform, and the top of the coaxial air blowing protection device at the upper end is flush, and a flow-equalizing ring cavity is formed between the flow-equalizing ring and the inner wall of the mounting groove and the flange. During welding, the protective gas enters the flow-equalizing ring cavity from the air inlet, and enters the coaxial through the flow-equalizing air holes, that is, the filter holes of the stainless steel sintered mesh filter element, to ensure the uniformity of the protective gas during welding, avoid welding bumps and pinholes caused by the turbulence of the protective gas, and aggravate the dirtiness of the protective lens caused by the negative pressure, and use the filter holes of the stainless steel sintered mesh filter element as the flow-equalizing air holes, so as to achieve a better flow-equalizing effect.

[0030] The above shows and describes the basic principle and main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. Anything not described in detail in the utility model is a well-known technology of those skilled in the art.

Claims

1. A top cover welding shielding gas flow equalization device, characterized in that: It includes a flow equalizing ring for evenly distributing the protective gas entering the coaxial air blowing protection device during welding. The flow equalizing ring is installed at the position corresponding to the air inlet hole in the coaxial air blowing protection device. The ring wall of the flow equalizing ring is provided with a plurality of flow equalizing holes. The flow equalizing holes are distributed in the shape of a sintered mesh filter element. The upper and lower ends of the flow equalizing ring are symmetrically fixedly connected with a group of docking flanges for docking the inner wall of the coaxial air blowing protection device and the flow equalizing ring. A flow equalizing ring cavity is formed between the outer wall of the flow equalizing ring, the docking flange and the inner wall of the coaxial air blowing protection device.

2. A top cover welding shielding gas flow equalization device according to claim 1, characterized in that: It also includes an installation groove arranged in the coaxial air blowing protection device, a mounting platform is arranged at the bottom of the installation groove, the lower end of the connecting flange is installed on the mounting platform, and the top surface of the upper end of the connecting flange is coplanar with the top surface of the coaxial air blowing protection device.

3. A top cover welding shielding gas flow equalizing device according to claim 2, characterized in that: The inner rings of the two butt flanges are welded to the outer peripheral walls of the corresponding ends of the current equalizing ring by laser welding.

4. The top cover welding shielding gas flow equalizing device according to claim 2, characterized in that: The flow equalizing ring is cut from a stainless steel sintered mesh filter element.

5. The top cover welding shielding gas flow equalizing device according to claim 4, characterized in that: The filtration accuracy of the stainless steel sintered mesh filter element is 200um.

6. A top cover welding shielding gas flow equalization device according to claim 5, characterized in that: The height of the current equalizing ring is 15 mm.

7. The top cover welding shielding gas flow equalizing device according to claim 6, characterized in that: The outer diameter of the docking flange is 55 mm.

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