Pressing tool and equipment for laser welding

Abstract

The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a laser welding hold-down clamp and equipment, and the middle of the laser welding hold-down clamp is hollow to form a laser channel for laser to pass through. And an air blowing channel is arranged at the lower part of the pressing tool for laser welding. Nitrogen serving as shielding gas is blown into the welding point position through the gas blowing channel. A dust suction ring way is arranged in the upper portion of the pressing tool for laser welding, and at least one side of the upper portion of the pressing tool for laser welding is provided with a dust suction opening. And the dust extraction opening, the dust extraction loop and the laser channel are sequentially communicated to form a dust extraction channel. The dust suction opening can communicate with an air suction pump, and negative pressure is provided by the air suction pump, so that smoke dust sequentially passes through the laser channel, the dust suction annular channel and the dust suction opening and then flows out of the laser welding pressing tool. On the whole, a traditional dust extraction channel is improved, so that the dust extraction efficiency and the dust extraction effect are greatly improved, the amount of smoke detained near a welding point position is reduced, the weld penetration stability is high, and the pseudo soldering phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery manufacturing, in particular to a press and equipment for laser welding. Background Art

[0002] The laser welding process is involved in the process of assembling the battery cells into modules. The laser welding process is mostly used for the welding of busbars, side panels and nickel sheets. When performing the laser welding process, the parts to be welded are pressed with the help of a traditional laser welding press. At the same time, nitrogen is blown to the welding point through a traditional laser welding press, and nitrogen is used as a shielding gas. However, the shielding gas will increase the smoke near the welding point, and a large amount of smoke will block the laser. Therefore, it is also necessary to use a traditional laser welding press to extract the smoke away from the welding point.

[0003] However, when using traditional laser welding presses to extract smoke from welding points, the extraction effect is generally poor, and a large amount of smoke is still retained near the welding points, resulting in unstable weld penetration and, in severe cases, cold welds. Utility Model Content

[0004] In order to solve the problem that when using a traditional laser welding press to extract smoke from the welding point, the extraction effect is general, and a large amount of smoke is still retained near the welding point, resulting in unstable weld penetration and, in severe cases, cold welding, the utility model provides a laser welding press and equipment.

[0005] In order to achieve the purpose of the utility model, a laser welding press is provided. The middle part of the laser welding press is hollow to form a laser channel, the lower part is provided with an air blowing channel, the interior of the upper part is provided with a dust extraction loop, and at least one side of the upper part is provided with a dust extraction port; the dust extraction port, the dust extraction loop and the laser channel are connected in sequence to form a dust extraction channel.

[0006] In some specific embodiments, the dust extraction channel is higher than the bottom end surface of the laser welding press by a first preset distance.

[0007] In some specific embodiments, it also includes:

[0008] The shielding ring is installed in the dust extraction channel, with a second preset distance reserved between the outer wall and the inner wall of the dust extraction channel, a third preset distance reserved between the top and the top of the dust extraction channel, and a fourth preset distance reserved between the bottom and the bottom of the dust extraction channel.

[0009] In some specific embodiments, the shielding ring is installed in the dust extraction channel by rivets.

[0010] In some specific embodiments, a blowing ring channel is provided inside the lower part of the laser welding press, an air inlet is provided on the outer side of the lower part, and an air outlet is provided on the inner side of the lower part;

[0011] The air inlet, the air blowing channel and the air outlet are connected in sequence to form an air blowing channel.

[0012] In some specific embodiments, the diameter of the air inlet is 2 mm-4 mm;

[0013] The diameter of the dust extraction port is 5mm-7mm.

[0014] In some specific embodiments, it also includes:

[0015] The upper base has a dust extraction loop inside, a dust extraction port on at least one side, an air inlet on the outer side of the lower part, and a groove at the bottom;

[0016] The lower base has a groove on the top and an air outlet on the inner side, and the top is detachably connected to the upper base; the grooves on the lower base and the upper base form an air blowing loop.

[0017] In some specific embodiments, there are multiple air outlets, which are respectively connected to the air blowing ring channel and are evenly distributed around the axis of the lower base;

[0018] And / or, there are two or more air inlets.

[0019] In some specific embodiments, a connecting flange is provided on the top surface of the upper base, and a first mounting hole is provided on the connecting flange;

[0020] And / or, a second mounting hole is provided at the bottom of the upper base, and a second mounting hole is opened on the lower base.

[0021] A laser welding device based on the same concept includes the laser welding press provided by any of the above specific embodiments.

[0022] Beneficial effects of the utility model: the laser welding press of the utility model improves the traditional dust extraction channel, greatly improves the dust extraction efficiency and effect, reduces the amount of smoke trapped near the welding point, makes the weld penetration more stable, and avoids the occurrence of cold welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of some specific embodiments of a laser welding press of the utility model;

[0024] Figure 2 yes Figure 1 An exploded view of a press for laser welding is shown;

[0025] Figure 3 yes Figure 1 A cross-sectional view of a laser welding press along the axial direction is shown.

[0026] In the accompanying drawings, 110, upper base; 111, laser channel; 112, dust extraction loop; 113, dust extraction port; 114, air inlet; 115, connecting flange; 1151, first mounting hole; 120, lower base; 121, groove; 122, air outlet; 123, second mounting hole; 130, shielding ring; 140, rivet. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axis", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, rather than indicating or implying 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 the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "join", "hinge" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] As described in the background technology, when performing the laser welding process, the parts to be welded are pressed with the help of a conventional laser welding press. At the same time, nitrogen is blown to the welding point through a conventional laser welding press, and the nitrogen is used as a shielding gas. However, the shielding gas will increase the smoke near the welding point, and a large amount of smoke will block the laser. Therefore, it is necessary to use a conventional laser welding press to extract the smoke away from the welding point. However, when the smoke is extracted from the welding point with the help of a conventional laser welding press, the dust extraction effect is general, and a large amount of smoke is still retained near the welding point, resulting in unstable weld penetration and, in severe cases, a cold weld.

[0033] To improve the above problems, refer to Figure 1 , Figure 2 and Figure 3 , a laser welding press is provided, which is suitable for pressing against a workpiece to be welded. The middle part of the laser welding press is hollow to form a laser channel 111 for the laser to pass through. A blowing channel is provided at the lower part of the laser welding press. Nitrogen as a protective gas is blown into the welding point through the blowing channel. A dust extraction loop 112 is provided inside the upper part of the laser welding press, and a dust extraction port 113 is provided on at least one side of the upper part of the laser welding press. The dust extraction port 113, the dust extraction loop 112 and the laser channel 111 are connected in sequence to form a dust extraction channel. The dust extraction port 113 can be connected to an exhaust pump, and the exhaust pump provides negative pressure so that the smoke near the welding point flows out of the laser welding press after passing through the laser channel 111, the dust extraction loop 112 and the dust extraction port 113 in sequence. On the whole, by improving the traditional dust extraction channel, the dust extraction efficiency and effect are greatly improved, the amount of smoke trapped near the welding point is reduced, the weld penetration is more stable, and the occurrence of cold welding is avoided.

[0034] Specifically, in the exemplary embodiment, the dust extraction loop 112 is higher than the bottom end surface of the laser welding press by a first preset distance. Preferably, the first preset distance is 10 mm, 15 mm, 20 mm, 25 mm or 30 mm. In this way, the height difference between the dust extraction port 113 and the bottom end surface of the laser welding press is effectively reduced, and the dust extraction effect and efficiency are improved.

[0035] Specifically, in the exemplary embodiment, the laser welding press also includes a shielding ring 130, which is fixedly installed in the dust extraction channel 112. A second preset distance is reserved between the outer wall of the shielding ring 130 and the inner wall of the dust extraction channel 112, a third preset distance is reserved between the top and the top of the dust extraction channel 112, and a fourth preset distance is reserved between the bottom and the bottom of the dust extraction channel 112. Preferably, the second preset distance, the third preset distance and the fourth preset distance are 0.5mm-2mm. In this way, an annular negative pressure belt can be formed between the outer wall of the shielding ring 130 and the inner wall of the dust extraction channel 112, and the annular negative pressure belt can greatly improve the dust extraction effect and efficiency.

[0036] Preferably, fixing plates are respectively provided on opposite sides of the shielding ring 130 , and the fixing plates on both sides are fixedly connected to the upper base 110 through rivets 140 , so that the shielding ring 130 is fixedly installed in the dust extraction channel 112 .

[0037] Specifically, in the exemplary embodiment, a blowing annular channel is provided inside the lower part of the laser welding press, an air inlet 114 is provided on the outer side of the lower part, and an air outlet 122 is provided on the inner side of the lower part. The air inlet 114, the blowing annular channel and the air outlet 122 are connected in sequence to form an air blowing channel. The air inlet 114 can be connected to an air source, and the nitrogen from the air source flows through the air inlet 114, the blowing annular channel and the air outlet 122 in sequence and then blows toward the welding point.

[0038] Preferably, the diameter of the air inlet 114 is 2 mm, 3 mm or 4 mm, and the diameter of the dust extraction port 113 is 5 mm, 6 mm or 7 mm, so as to meet the air blowing effect and dust extraction effect.

[0039] Specifically, in the exemplary embodiment, the press for laser welding further includes an upper base 110 and a lower base 120. A dust extraction loop 112 is provided inside the upper base 110, and a dust extraction port 113 connected to the dust extraction loop 112 is provided on at least one side. An air inlet 114 is provided on the outer side of the lower part of the upper base 110, and a groove 121 is provided on the bottom. A groove 121 is provided on the top of the lower base 120, and an air outlet 122 is provided on the inner side. The grooves 121 on the lower base 120 and the upper base 110 form an air blowing loop. The air blowing loop can be pressurized so that the amount of nitrogen flowing out of each air outlet 122 is relatively uniform. The top of the lower base 120 is detachably connected to the upper base 110 to facilitate assembly and use and disassembly and maintenance.

[0040] Preferably, a conical abutment interface is provided in the middle of the lower base, which can effectively extend the service life of the lower base and the laser welding press.

[0041] Preferably, there are multiple air outlets 122, which are respectively connected to the air blowing ring channel and are evenly distributed around the axis of the lower base 120. And / or, there are more than two air inlets 114. Specifically, there are 5, 6, 7, 8, 9 or 10 air outlets 122. There are 2, 3, 4 or more than 5 air inlets 114.

[0042] Preferably, a connecting flange 115 is provided on the top surface of the upper base 110, and first mounting holes 1151 are provided at the four corners of the connecting flange 115. The first mounting holes 1151 are threaded holes. The upper base 110 can be mounted on the laser welding fixture by using the first screws through the first mounting holes 1151. And / or, second mounting holes 123 are provided at the four corners of the bottom of the upper base 110, and second mounting holes 123 are provided at the four corners of the lower base 120. The second mounting holes 123 are threaded holes. The lower base 120 and the upper base 110 can be fixedly connected by using the second screws through the second mounting holes 123.

[0043] The present invention provides a laser welding device, characterized in that it comprises a gas source, an air pump and a laser welding press provided by any of the above-mentioned specific embodiments. The gas source is connected to the gas inlet 114. The air pump is connected to the dust extraction port 113. By improving the traditional dust extraction channel, the dust extraction efficiency and dust extraction effect are greatly improved, the amount of smoke and dust trapped near the welding point is reduced, the weld penetration is more stable, and the occurrence of cold welding is avoided.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", "a specific embodiment" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the scope disclosed by the present invention according to the technical solution and the concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A press for laser welding, characterized in that: The laser welding press is hollow in the middle to form a laser channel, an air blowing channel is provided at the lower part, a dust extraction loop is provided inside the upper part, and a dust extraction port is provided on at least one side of the upper part; the dust extraction port, the dust extraction loop and the laser channel are connected in sequence to form a dust extraction channel.

2. The laser welding press according to claim 1, characterized in that: The dust extraction channel is higher than the bottom end surface of the laser welding press by a first preset distance.

3. The laser welding press according to claim 1, characterized in that: Also includes: A shielding ring is installed in the dust extraction channel, with a second preset distance reserved between the outer wall and the inner wall of the dust extraction channel, a third preset distance reserved between the top and the top of the dust extraction channel, and a fourth preset distance reserved between the bottom and the bottom of the dust extraction channel.

4. The laser welding press according to claim 3, characterized in that: The shielding ring is installed in the dust extraction channel by rivets.

5. The laser welding press according to any one of claims 1 to 4, characterized in that: The lower part of the laser welding press is provided with an air blowing ring channel inside, an air inlet is provided on the outer side of the lower part, and an air outlet is provided on the inner side of the lower part; The air inlet, the air blowing annular channel and the air outlet are connected in sequence to form the air blowing channel.

6. The laser welding press according to claim 5, characterized in that: The diameter of the air inlet is 2mm-4mm; The diameter of the dust extraction port is 5mm-7mm.

7. The laser welding press according to claim 5, characterized in that: Also includes: The upper base has the dust extraction ring channel inside, the dust extraction port on at least one side, the air inlet on the outer side of the lower part, and a groove at the bottom; The lower base has the groove on the top and the air outlet on the inner side, and the top is detachably connected to the upper base; the grooves on the lower base and the upper base form the blowing ring channel.

8. The laser welding press according to claim 7, characterized in that: There are multiple air outlets, which are respectively connected to the air blowing ring channel and are evenly distributed around the axis of the lower base; And / or, there are more than two air inlets.

9. The laser welding press according to claim 7, characterized in that: A connecting flange is provided on the top surface of the upper base, and a first mounting hole is opened on the connecting flange; And / or, a second mounting hole is provided at the bottom of the upper base, and the second mounting hole is opened on the lower base.

10. A laser welding device, characterized in that: A laser welding press comprising the press according to any one of claims 1 to 9.

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