Welding mechanism

Abstract

A welding mechanism comprises an air cylinder and a carrying plate. Three groups of air cylinders are vertically mounted on a horizontal extension plate of the carrier plate, the bottom of each group of air cylinders is in transmission butt joint with a pole pressure head, a left tab pressure head and a right tab pressure head through floating assemblies, and pressure head structures at the bottoms of the pole pressure head, the left tab pressure head and the right tab pressure head are in spot welding contact with tabs to be welded; and conductive copper plates are paved at the top parts of the pole pressing head, the left tab pressing head and the right tab pressing head. According to the welding mechanism, the whole structure is achieved through the welding mechanism with two sets of welding power sources, two sets of welding transformers and one set of three air cylinders, the air cylinders installed at the positions of a pole column pressing head and a left pole lug pressing head are connected to the positive electrode sides of the two sets of transformers, and a welding loop is shared and finally returns to the negative electrode sides of the welding transformers. Compared with a welding structure of a single group of welding ends, the synchronous welding structure of the three groups of welding ends can improve the welding efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of tab welding equipment, and in particular relates to a welding mechanism. Background Art

[0002] Single-sided tab welding equipment plays an important role in the production process of lithium batteries. Its technical improvement direction should be aimed at improving welding accuracy, reducing thermal impact, improving welding efficiency, ensuring welding quality, and achieving intelligence and environmental protection to meet market demand and technological development trends.

[0003] The single-side tab welding process mainly uses laser welding, ultrasonic welding and resistance welding. These welding methods have their own advantages and disadvantages. For example, laser welding has high precision but high equipment cost, ultrasonic welding has little heat impact but complicated operation, and resistance welding has high efficiency but welding quality is easily affected by welding parameters. Therefore, in practical applications, it is necessary to select the appropriate welding process according to the specific situation.

[0004] Therefore, the present application provides a welding mechanism, the entire structure is implemented by two sets of welding power supplies, two sets of welding transformers, and a set of three-cylinder welding mechanisms, wherein the cylinders installed at the pole pressure head and the left pole ear pressure head position are connected to the positive side of the two sets of transformers, and the welding circuit is shared and finally returns to the negative side of the welding transformer. The synchronous welding structure of three sets of welding ends can improve the welding efficiency compared with the welding structure of a single set of welding ends; and the two sets of synchronously driven welding pole pressure heads and left pole ear pressure heads can cooperate to complete the double-station synchronous spot welding process, with a simple structure and high operating precision. Summary of the invention

[0005] In order to achieve the above object, the technical solution of the utility model is as follows:

[0006] A welding mechanism comprises a cylinder and a carrier plate; three groups of cylinders are vertically mounted on a horizontal extension plate of the carrier plate, the bottom of each group of cylinders is respectively connected to a pole pressure head, a left pole lug pressure head and a right pole lug pressure head through a floating assembly, and the pole pressure head, the left pole lug pressure head and the right pole lug pressure head bottom pressure head structure are in spot welding contact with the pole lug to be welded;

[0007] The tops of the pole pressure head, the left pole tab pressure head and the right pole tab pressure head are all paved with conductive copper plates.

[0008] Further, the floating assembly includes a floating cover plate and a floating joint;

[0009] The floating joint is connected to the driving rod at the bottom of the cylinder through transmission, and the floating joint is installed in the through hole at the center of the floating cover along the limit, and the bottom end surface of the floating cover is fixedly connected to the lower pressure head.

[0010] Furthermore, the lower pressure head is a vertically bent plate structure, and the lower pressure head horizontal plate structure is respectively in guiding and pushing contact with the insulating pads on the upper surfaces of the pole pressure head, the left pole lug pressure head and the right pole lug pressure head through insulating guide rods.

[0011] Furthermore, a conductive copper plate, a first pressure head fixing plate and a second pressure head fixing plate are respectively installed between the insulating pad and the pole pressure head, and the upper end surfaces of the left pole tab pressure head and the right pole tab pressure head.

[0012] Furthermore, the conductive copper plate and the two groups of downward pressing heads installed on the upper end of the first pressing head fixing plate are in a synchronous downward pressing connection structure.

[0013] Furthermore, the control circuits of the pole pressure head, the left pole tab pressure head and the right pole tab pressure head are all distributed in the pipeline crawler, and the pipeline crawler is an upward extending structure along the back side of the carrier plate.

[0014] The beneficial effects of the utility model are:

[0015] Compared with the prior art, the present application provides a welding mechanism, the entire structure of which is implemented by two sets of welding power supplies, two sets of welding transformers, and a set of three-cylinder welding mechanisms, wherein the cylinders installed at the pole pressure head and the left pole ear pressure head position are connected to the positive side of the two sets of transformers, and the welding circuit is shared and finally returns to the negative side of the welding transformer. The synchronous welding structure of three sets of welding ends can improve the welding efficiency compared with the welding structure of a single set of welding ends; and the two sets of synchronously driven welding pole pressure heads and left pole ear pressure heads can cooperate to complete the double-station synchronous spot welding process, with a simple structure and high operating precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a structural schematic diagram of a welding mechanism.

[0017] Figure 2 This is a front view of a bottom electrode head assembly of a welding mechanism according to the utility model.

[0018] List of Figure Symbols:

[0019] 1 is a cylinder, 2 is a carrier plate, 3 is a lower pressure head, 4 is a pipeline track, 5 is a pole pressure head, 6 is a floating joint, 7 is a left pole ear pressure head, 8 is a right pole ear pressure head, 10 is a floating cover plate, 12 is an insulating pad, 13 is a conductive copper plate, 14 is a first pressure head fixing plate, and 15 is a second pressure head fixing plate. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations. It should be understood that the following specific implementations are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0021] like Figure 1and Figure 2 As shown in Figure 2 , a welding mechanism includes a cylinder and a carrier plate. On the horizontally extending plate of the carrier plate 2, three groups of cylinders 1 are vertically installed. The bottom of each group of cylinders is respectively in transmission connection with a pole post press head 5, a left pole ear press head 7, and a right pole ear press head 8 through a floating assembly. The bottom press head structures of the pole post press head 5, the left pole ear press head 7, and the right pole ear press head 8 are in spot welding contact with the pole ears to be welded.

[0022] Conductive copper plates 13 are laid on the tops of the pole post press head 5, the left pole ear press head 7, and the right pole ear press head 8.

[0023] As Figure 1 and Figure 2 shown in Figure 2 , the floating assembly includes a floating cover plate 10 and a floating joint 6.

[0024] The floating joint 6 is in transmission connection with the driving rod at the bottom of the cylinder 1. The floating joint 6 is installed along a through hole limited at the center of the floating cover plate 10, and the bottom end face of the floating cover plate 10 is fixedly connected to a lower press head 3.

[0025] As Figure 1 and Figure 2 shown in Figure 2 , the lower press head 3 has a vertically bent plate structure. The horizontal plate structure of the lower press head 3 is in guiding push - top contact with insulating pads 12 on the upper end faces of the pole post press head 5, the left pole ear press head 7, and the right pole ear press head 8 through insulating guide rods.

[0026] As Figure 1 and Figure 2 shown in Figure 2 , conductive copper plates 13, a first press head fixing plate 14, and a second press head fixing plate 15 are respectively installed between the insulating pads 12 and the upper end faces of the pole post press head 5, the left pole ear press head 7, and the right pole ear press head 8.

[0027] As Figure 1 and Figure 2 shown in Figure 2 , the two groups of lower press heads 3 installed on the tops of the conductive copper plates 13 and the first press head fixing plate 14 have a synchronous downward - pressing connection structure.

[0028] As Figure 1 and Figure 2 shown in Figure 2 , the control circuits of the pole post press head 5, the left pole ear press head 7, and the right pole ear press head 8 are all distributed in a pipeline crawler 4, and the pipeline crawler 4 has an upward - extending structure along the back of the carrier plate 2.

[0029] In summary, during welding, the PLC control signal calls the solenoid valve to control the cylinder to press down the material to be welded. The area directly below the electrode is supported by a copper conductor, and the entire mechanism can achieve double - point welding.

[0030] It should be noted that the above content only illustrates the technical idea of the present utility model, and cannot be used to limit the protection scope of the present utility model. For those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can still be made, and these improvements and refinements all fall within the protection scope of the claims of the present utility model.

Claims

1. A welding mechanism, comprising a cylinder and a carrier plate; characterized in that: Three sets of cylinders (1) are vertically installed on the horizontal extension plate of the carrier plate (2). The bottom of each set of cylinders is respectively in transmission connection with the pole post press head (5), the left pole ear press head (7), and the right pole ear press head (8) through floating components. The bottom press head structures of the pole post press head (5), the left pole ear press head (7), and the right pole ear press head (8) are in spot welding contact with the pole ears to be welded. Conductive copper plates (13) are laid on the tops of the pole post press head (5), the left pole ear press head (7), and the right pole ear press head (8).

2. The welding mechanism according to claim 1, characterized in that: Floating component It includes a floating cover plate (10) and a floating joint (6); The floating joint (6) is in transmission connection with the driving rod at the bottom of the cylinder (1). The floating joint (6) is installed along a through hole in the center of the floating cover plate (10). The bottom end face of the floating cover plate (10) is fixedly connected to the lower press head (3).

3. The welding mechanism according to claim 2, characterized in that: The lower press head (3) has a vertically bent plate structure. The horizontal plate structure of the lower press head (3) is in guiding push - contact with the insulating pads (12) on the upper end faces of the pole post press head (5), the left pole ear press head (7), and the right pole ear press head (8) through insulating guide rods.

4. A welding mechanism according to claim 3, characterized in that: Conductive copper plates (13), a first press head fixing plate (14), and a second press head fixing plate (15) are respectively installed between the insulating pads (12) and the upper end faces of the pole post press head (5), the left pole ear press head (7), and the right pole ear press head (8).

5. A welding mechanism according to claim 4, characterized in that: The two groups of lower press heads (3) installed on the tops of the conductive copper plate (13) and the first press head fixing plate (14) have a synchronous downward - pressing connection structure.

6. The welding mechanism according to claim 1, wherein: The control circuits of the pole post press head (5), the left pole ear press head (7), and the right pole ear press head (8) are all distributed in the pipeline crawler (4), and the pipeline crawler (4) has an upward - extending structure along the back of the carrier plate (2).

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