Large-current welding machine working head and welding machine thereof

Abstract

The utility model relates to a large-current welding machine working head and a welding machine thereof, and the large-current welding machine working head is provided with a welding working head which comprises an upper working head and a lower working head; welding power sources which operate independently are arranged on the two sides of the welding working head respectively, the two sides of the upper working head are connected with the positive electrodes of the two welding power sources through conductive parts at the same time, and the two sides of the lower working head are connected with the negative electrodes of the two welding power sources through conductive parts at the same time. The large-current welding machine is provided with a closed frame, and an operation cavity is formed in the middle of the closed frame. The large-current welding machine working head is installed on the closed frame. And an upper working electrode and a lower working electrode are arranged in the working chamber. According to the utility model, the two welding power supplies which operate independently are arranged on the two sides of the working head of the welding machine, so that the current flowing to the welding power supplies through the working head is reduced to half, the overcurrent reliability of a connecting part is improved, and the service life of equipment is further prolonged.

Description

Technical Field

[0001] The utility model relates to a working head of a welding machine capable of realizing high-current welding and a welding machine adopting the working head, belonging to the field of welding machine equipment. Background Art

[0002] With the development of circuit technology, the current applied in electrical equipment is getting larger and larger, especially in technologies such as electric vehicle charging technology or in high-current circuit breakers; in order to achieve excessive current, it is necessary to weld the connecting busbar and the bus bar to ensure stable and reliable connection.

[0003] As Figure 1 shown, it is the connection of the busbar 12 and the bus bar 11, and a welding area 13 is formed at the connection; when several busbars 12 are welded to the bus bar 11, if the form of welding the single busbar 12 in sequence is adopted, the welding process is relatively long, and there may be problems with the welding quality. When welding the subsequent busbars 12, the temperature of the welding area 13 is relatively high, which may cause the previously welded busbars 12 and the bus bar 11 to become detached, etc.

[0004] Therefore, in order to improve the welding reliability between the busbar 12 and the bus bar 11, generally, it is required that several busbars 12 and the bus bar 11 are welded at one time, and an aluminum flexible connection welding machine and a welding process similar to the one with the Chinese patent publication number CN107378224A are used. However, as the size of the welding area 13 becomes larger, in order to achieve reliable welding between the busbar 12 and the bus bar 11, the current that the welding machine needs to load in this area also needs to be very large, often reaching more than 100KA; in this case, the connecting cable between the power supply of the welding machine and the working head of the welding machine often has its service life reduced due to the need to bear a very large current passing through. After welding several times, due to excessive current at the connection and serious heating, ablation and fracture will occur; therefore, it is necessary to often replace the new connecting cable to continue the welding work.

[0005] To meet the welding requirements, it is necessary to modify the structure of the working head of the welding machine and the structure of the welding machine, in order to improve the over-current reliability of the connection of the working head of the welding machine, so as to realize the continuous and reliable use of the welding machine. Content of the Utility Model

[0006] The purpose of the utility model is to provide a working head of a high-current welding machine and its welding machine. Two independent operating welding power supplies are respectively connected to both sides of the working head of the welding machine, so that the current flowing through the working head to the welding power supply is reduced by half, thereby improving the over-current reliability of the connection part and further improving the service life of the equipment; at the same time, the structure of the high-current welding machine is also improved, and the frame is changed to a closed frame, improving the reliability of the equipment.

[0007] To achieve the above-mentioned utility model purpose, in the first aspect of the present utility model, a working head of a high-current welding machine is provided, which is provided with a welding working head, including an upper working head and a lower working head;

[0008] On both sides of the welding working head, independently operating welding power supplies are respectively provided, and both of the 2 welding power supplies have a positive electrode and a negative electrode;

[0009] Both sides of the upper working head are simultaneously connected to the positive electrodes of the 2 welding power supplies through conductive components, and both sides of the lower working head are simultaneously connected to the negative electrodes of the 2 welding power supplies through conductive components;

[0010] An upper working electrode is provided at the bottom of the upper working head, and a lower working electrode is provided at the top of the lower working head; the upper working electrode and the lower working electrode are opposite to each other to form a welding operation area.

[0011] By setting 2 independently operating welding power supplies and connecting them in parallel to both sides of the upper working head and the lower working head, the working current can be shunted, thereby effectively reducing the overcurrent of the conductive components and improving the safety and reliability.

[0012] Moreover, by setting 2 independently operating welding power supplies, the power requirement of the welding power supply itself is reduced, the purchase cost of the welding power supply is reduced, and the operating reliability of the welding power supply itself is also improved.

[0013] As a further improvement of the present utility model, both sides of the upper working head are respectively connected to the positive electrodes of the welding power supplies on both sides through flexible conductive connections.

[0014] Furthermore, a fixed conductive connecting plate is provided between the flexible conductive connection and the upper working head.

[0015] As a further improvement of the present utility model, the lower working head is fixedly installed on a conductive copper plate, and both sides of the conductive copper plate are connected to the negative electrodes of the welding power supplies on both sides through fixed conductive connecting plates.

[0016] In the second aspect of the present utility model, a high-current welding machine is provided, which is provided with an enclosed frame, and there is an operation chamber in the middle of the enclosed frame;

[0017] The above-mentioned working head of the high-current welding machine is installed on the enclosed frame;

[0018] A vertical driving device is installed on the upper cross beam of the enclosed frame, and the extending component of the vertical driving device is connected to the upper working head;

[0019] The lower working head is fixedly installed on the lower cross beam of the enclosed frame;

[0020] Two welding power supplies are respectively installed in the two side columns of the enclosed frame, and the welding power supplies are respectively connected to the upper working head and the lower working head through conductive components;

[0021] The working chamber is provided with an upper working electrode and a lower working electrode.

[0022] As a further improvement of the present utility model, a spray cooling water pipe is provided in the welding operation area;

[0023] The spray cooling water pipe is arranged along the working clamping direction of the upper working electrode or the lower working electrode;

[0024] The spray cooling water pipe is connected to an external cooling water source.

[0025] As a further improvement of the present utility model, 2 lower working electrodes are provided on the lower working head, 1 is a fixed electrode, and the other is a movable electrode;

[0026] The fixed electrode is directly installed on the lower working head;

[0027] The movable electrode is connected to the conductive copper plate through a flexible conductive connection;

[0028] The movable electrode is installed on a horizontal driving component;

[0029] The movable electrode and the fixed electrode cooperate to clamp and fix the component to be welded.

[0030] As a further improvement of the present utility model, a feeding mechanism is provided between the lower working head and the welding power source.

[0031] For the working head of the high-current welding machine and the welding machine of the present utility model, by arranging 2 independently operating welding power sources on both sides of the working head of the welding machine, the current flowing through the working head to the welding power source is reduced to half, thereby improving the over-current reliability of the connection part, and further improving the service life of the equipment.

[0032] Moreover, the frame of the high-current welding machine is changed to a closed frame, so that a greater pressure can be applied between the upper and lower working heads, improving the pressing force during the welding process, improving the welding reliability, and avoiding the frame from being deformed by force, thus improving the welding quality.

[0033] The working head of the high-current welding machine and the welding machine of the present utility model have a simple structure and are easy to manufacture; and the equipment is more reliable in use. Description of the Drawings

[0034] Figure 1 It is a schematic diagram of the connection structure of the bus bar and the bus bar;

[0035] Figure 2 It is the overall structure schematic diagram of the working head of the high-current welding machine of the present utility model Figure 1 ;

[0036] Figure 3 It is the overall structure schematic diagram of the working head of the high-current welding machine of the present utility modelFigure 2 ;

[0037] Figure 4 This is a schematic diagram of the overall structure of the working head of the high-current welding machine of the present utility model Figure 3 ;

[0038] Figure 5 This is a schematic diagram of the overall structure of the working head of the high-current welding machine of the present utility model Figure 4 ;

[0039] Figure 6 This is a schematic diagram of the overall structure of the working head of the high-current welding machine of the present utility model Figure 5 ;

[0040] Figure 7 This is a schematic diagram of the overall structure of the high-current welding machine of the present utility model Figure 1 ;

[0041] Figure 8 This is a schematic diagram of the overall structure of the high-current welding machine of the present utility model Figure 2 . Specific embodiments

[0042] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings

[0043] The present utility model relates to a working head of a high-current welding machine and its welding machine. Among them, the specific structure of the working head of the high-current welding machine is as shown Figures 2 - 6 . There are provided 2 independently operating welding power sources 2. Both of the 2 welding power sources 2 have a positive electrode 21 and a negative electrode 22. A welding working head is further provided, including an upper working head 3 and a lower working head 4. The bottom of the upper working head 3 is provided with an upper working electrode 31, and the top of the lower working head 4 is provided with a lower working electrode 41. The upper working electrode 31 and the lower working electrode 41 face each other to form a welding operation area. The 2 welding power sources 2 are located on both sides of the welding operation area. Both sides of the upper working head 3 are simultaneously connected to the positive electrodes 21 of the 2 welding power sources 2 through conductive components, and both sides of the lower working head 4 are also simultaneously connected to the negative electrodes 22 of the 2 welding power sources 2 through conductive components

[0044] By providing 2 independently operating welding power sources 2 and connecting them in parallel to both sides of the upper working head 3 and the lower working head 4, the working current can be shunted, thereby effectively reducing the overcurrent of the conductive components and improving the safety and reliability

[0045] Moreover, by providing 2 independently operating welding power sources 2, the power requirement of the welding power source itself is reduced, the purchase cost of the welding power source is reduced, and the operating reliability of the welding power source 2 itself is also improved

[0046] The upper working head 3 is generally installed on the vertical driving device 7 and can move up and down. Therefore, both sides of the upper working head 3 are connected to the positive electrode 21 of the welding power source 2 through the flexible conductive connection 26. A fixed conductive connecting plate 27 can be further provided between the flexible conductive connection 26 and the upper working head 3 to improve the connection reliability.

[0047] Among them, the flexible conductive connection 26 can be a copper foil flexible connection, that is, composed of several stacked copper foils, and then the two ends are welded together. And the flexible conductive connection 26 is preferably arc-shaped, so that it can be adaptively adjusted with the up and down movement of the upper working head 3 to ensure a reliable connection between the upper working head 3 and the positive electrode 21 of the welding power source 2.

[0048] The lower working head 4 is generally fixedly installed on the base of the welding machine. Therefore, when the lower working head 4 is conductively connected to the welding power sources 2 on both sides, the lower working head 4 can be first fixedly installed on the conductive copper plate, and then both sides of the conductive copper plate are connected to the negative electrode 22 through the fixed conductive connecting plate 27.

[0049] Generally, there is 1 lower working electrode 41 on the lower working head 4, which is detachably installed and fixed on the top of the lower working head 4. Different lower working electrodes 41 can be replaced according to the shape of the welding target. Of course, in special cases, there can also be 2 lower working electrodes 41, 1 is a fixed electrode, and the other is a movable electrode. The movable electrode is connected to the conductive copper plate through the flexible conductive connection 26. The movable electrode is installed on the horizontal driving component 42, and the movable electrode can be controlled to cooperate with the fixed electrode to clamp and fix the component to be welded.

[0050] Preferably, a spray cooling water pipe 5 is also provided in the welding operation area, which is connected to an external cooling water source. During welding operation, cooling water is sprayed on the welding area to cool down. At the same time, a large amount of water vapor is formed when the water meets the heated component, isolating the air, especially isolating oxygen, to prevent the welded component from accelerating oxidation at high temperature.

[0051] The working head of a conventional welding machine has a "C" - shaped structure with a large open space, which is convenient for taking and placing the components to be welded. However, for the working head of the high - current welding machine of the present invention, since welding power sources 2 are arranged on both sides and there is only an opening in the front - rear direction, it is not very convenient to take and place the components to be welded. Therefore, a feeding mechanism 6 is provided between the lower working head 4 and the welding power source 2, which can move in and out, facilitating the feeding of the components to be welded into the welding operation area, especially to the lower working electrode 41, for convenient welding operation.

[0052] Such as Figure 7 、 Figure 8As shown in the figure, based on the structure of the working head of the above-mentioned high-current welding machine, the present utility model has also improved the structure of the high-current welding machine. A closed-frame 8 is used as the machine frame, which has an operation chamber 81 in the middle. An upper working electrode 31 and a lower working electrode 41 are provided in the operation chamber 81.

[0053] The vertical driving device 7 is fixed on the upper crossbeam of the closed-frame 8, and the extending component of the vertical driving device 7 is connected to the upper working head 3; the lower working head 4 is fixed on the lower crossbeam of the closed-frame 8; two welding power supplies 2 are installed in the columns on both sides of the closed-frame 8 and are respectively connected to the upper working head 3 and the lower working head 4 through conductive components.

[0054] Since the sizes of the welding parts are relatively large, the pressure output by the corresponding vertical driving device 7 also needs to be greater. Therefore, the closed-frame 8 is adopted. Compared with the traditional "C"-shaped frame, the upper working head 3 and the lower working head 4 are enclosed and restricted, and will not be displaced due to the increase in pressure, and it also avoids the displacement between the parts to be welded and the working electrodes during the welding process, resulting in a reduction in welding quality. That is, the high-current welding machine of the present utility model is more reliable during use and the welding quality is also better.

[0055] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present invention, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. High current welding machine working head, characterized in that: It is equipped with a welding work head, including an upper work head and a lower work head; Independently operated welding power sources are provided on both sides of the welding work head, and both welding power sources have positive and negative poles; Both sides of the upper working head are connected to the positive electrodes of the two welding power sources through conductive components at the same time, and both sides of the lower working head are connected to the negative electrodes of the two welding power sources through conductive components at the same time; An upper working electrode is arranged at the bottom of the upper working head, and a lower working electrode is arranged at the top of the lower working head; the upper working electrode and the lower working electrode are opposite to each other to form a welding operation area.

2. The high current welding machine working head as claimed in claim 1, characterized in that: The two sides of the upper working head are respectively connected to the positive electrodes of the welding power sources on both sides through flexible conductive connections.

3. The high current welding machine working head as claimed in claim 2, characterized in that: A fixed conductive connection plate is provided between the flexible conductive connection and the upper working head.

4. The high current welding machine working head as claimed in claim 1, characterized in that: The lower working head is fixedly mounted on the conductive copper plate, and two sides of the conductive copper plate are connected to the negative electrodes of the welding power sources on both sides through fixed conductive connecting plates.

5. High current welding machine, characterized in that, A closed frame is provided, and a working chamber is provided in the middle of the closed frame; A high current welding machine working head as described in any one of claims 1 to 4 is mounted on the closed frame; A vertical drive device is installed on the upper crossbeam of the closed frame, and the extended part of the vertical drive device is connected to the upper working head; A lower working head is fixedly mounted on the lower crossbeam of the closed frame; Two welding power sources are installed in the columns on both sides of the closed frame, and the welding power sources are connected to the upper working head and the lower working head respectively through conductive components; An upper working electrode and a lower working electrode are arranged in the working chamber.

6. The high current welding machine according to claim 5, characterized in that: The welding operation area is equipped with a spray cooling water pipe; The spray cooling water pipe is arranged along the working clamping direction of the upper working electrode or the lower working electrode; The spray cooling water pipe is connected to an external cooling water source.

7. The high current welding machine according to claim 5, characterized in that: The lower working head is provided with two lower working electrodes, one is a fixed electrode and the other is a movable electrode; The fixed electrode is directly mounted on the lower working head; The movable electrode is connected to the conductive copper plate via a flexible conductive connection; The movable electrode is mounted on the horizontal driving component; The movable electrode cooperates with the fixed electrode to clamp and fix the parts to be welded.

8. The high current welding machine according to claim 5, characterized in that: A feeding mechanism is arranged between the lower working head and the welding power source.

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