Automatic feeding mechanism for brazing filler metal sheets and welding device

Abstract

The utility model discloses an automatic feeding mechanism for brazing filler metal sheets and a welding device, and relates to the technical field of welding equipment, the feeding mechanism comprises a brazing filler metal groove used for vertically placing the brazing filler metal sheets; the material pushing assembly is located on one side of the brazing filler metal groove and used for pushing the brazing filler metal pieces in a stepping mode. The discharging hole is formed in the bottom wall of the brazing filler metal groove and used for vertically discharging the brazing filler metal sheets; the discharging roller is located on the other side of the brazing filler metal groove and used for vertically discharging the brazing filler metal pieces towards the discharging hole during rotation. The material receiving groove is located below the brazing filler metal groove and used for receiving the discharged brazing filler metal pieces, keeping the brazing filler metal pieces in a vertical state and conveying the brazing filler metal pieces to a workpiece welding position so as to complete the feeding action; the feeding mechanism has a certain feeding speed, feeding is accurate, and brazing filler metal pieces are kept in a vertical state all the time in the feeding process; the welding device comprises the feeding mechanism and the material moving mechanism, and the butt joint positioning precision of the copper-clad aluminum bar is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of welding equipment technology, specifically relating to an automatic feeding mechanism for brazing filler metal sheets and a welding device. Background Technology

[0002] Copper-clad aluminum busbars are composite materials that combine copper and aluminum, commonly used in power systems, electronic equipment, and other applications requiring high electrical conductivity. Due to their wide range of applications, copper-clad aluminum busbars have stringent dimensional requirements, often necessitating brazing. Currently, brazing of copper-clad aluminum busbars largely relies on manual operation, posing safety and efficiency challenges. Therefore, welding devices have been developed that use clamps to fix, rotate, and align the copper-clad aluminum busbars, employing laser welding heads and electromagnetic induction welding heads for welding, and utilizing control panels and CNC modules to complete all welding actions, thus solving the problems associated with manual welding. However, in practical applications, the feeding of the brazing filler metal also affects welding quality and efficiency. The brazing filler metal is relatively thin, making manual feeding slow and difficult to maintain consistently high efficiency over extended periods. Furthermore, human factors can easily lead to inaccurate placement and angular deviations of the brazing filler metal, affecting the stability of the weld quality. There are also some automatic feeding structures suitable for thin-sheet brazing filler metals. Most of them adopt horizontal feeding. The brazing filler metal sheets are placed horizontally. On the one hand, the surface will be deformed and scratched due to friction and collision during the movement. On the other hand, it is not convenient for welding long strip copper-clad aluminum busbars. As a result, the welding device needs to be operated by a multi-degree-of-freedom robotic arm, which is too costly. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic feeding mechanism and welding device for brazing filler metal sheets with a simple structure and reasonable design in order to solve the above problems.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] An automatic feeding mechanism for brazing filler metal sheets includes:

[0006] A solder groove is used to vertically place solder pieces.

[0007] A pusher assembly, located on one side of the solder groove, is used to step and push the solder sheet;

[0008] A feeding hole is provided on the bottom wall of the brazing filler groove for vertical feeding of the brazing filler sheet;

[0009] The feeding roller, located on the other side of the brazing filler groove, is used to vertically feed the brazing filler sheet into the feeding hole when it rotates.

[0010] The receiving groove, located below the brazing filler groove, is used to receive the brazing filler sheet after it is unloaded and to keep it in a vertical position for conveying it to the workpiece welding position to complete the loading action.

[0011] As a further optimization of this utility model, the feeding assembly includes a stepper driver and a feeding plate located at the driving end of the stepper driver.

[0012] As a further optimization of this utility model, the brazing filler groove includes:

[0013] The base plate has at least two grooves on both sides along the stepping direction;

[0014] There are two side plates, which are movably mounted above the base plate. The side plates are fixed to the sliding grooves on the base plate by fasteners.

[0015] As a further optimization of this utility model, the bottom plate is provided with sanding plates on the upper and lower sides and the inner sides of the two side plates for grinding the edges of the brazing filler metal sheet.

[0016] As a further optimization of this utility model, one end of the feeding roller is provided with a driving device, and the surface of the feeding roller is evenly provided with burr protrusions.

[0017] As a further optimization of this utility model, the receiving groove is a U-shaped groove plate, and several receiving grooves are arranged on a cyclically moving conveyor. The conveyor achieves cyclical movement through several drive rollers arranged on its inner side.

[0018] This utility model also provides a welding device for welding copper-clad aluminum busbar workpieces, including a first clamping block, a second clamping block, a laser welding head, an electromagnetic induction welding head, a control panel, and the aforementioned feeding mechanism and transferring mechanism.

[0019] The material transfer mechanism, located on one side of the feeding mechanism, is used to transfer the brazing filler metal sheet from the receiving groove to the copper-clad aluminum busbar workpiece to be welded. The material transfer mechanism includes a robotic arm and a material transfer fixture.

[0020] As a further optimization of this utility model, it also includes a pre-clamping mechanism located below the copper-clad aluminum busbar workpiece to be welded, for supporting the workpiece and pre-clamping the brazing filler metal piece. The pre-clamping mechanism includes a brazing filler metal clamp and a lifting component.

[0021] As a further optimization of this utility model, the electromagnetic induction welding head is a double-closed C-shape, and one end of the electromagnetic induction welding head is provided with a cantilever that slides along the length direction of the copper-clad aluminum busbar to be welded.

[0022] As a further optimization of this utility model, both the material transfer fixture and the brazing fixture are adjustable-distance fixtures.

[0023] This utility model has at least the following beneficial effects:

[0024] This feeding mechanism vertically places a certain number of brazing filler metal sheets in the filler metal trough, ensuring close contact between the foremost sheet and the discharge roller. A pusher assembly advances the filler metal sheet by moving it one sheet's thickness at a time. Each rotation of the discharge roller causes a filler metal sheet to vertically enter the receiving trough from the discharge hole. The receiving trough moves forward one step at a time, achieving automatic and rapid feeding of the filler metal sheets, improving production efficiency and reducing labor costs. During the feeding and movement of the filler metal sheets, they remain vertical at all times. With vertical feeding, the sheets fall sequentially, reducing the risk of accumulation or blockage. During vertical feeding, the filler metal sheets are primarily affected by gravity and slight air resistance, resulting in relatively little friction and collision with other components. Furthermore, the vertical position of the filler metal sheets during feeding allows the robotic arm to move only in the XY plane.

[0025] This welding device, combined with the aforementioned feeding mechanism, is an improvement on the existing welding device. By utilizing the cooperation between the material transfer mechanism and the feeding mechanism, the brazing filler metal sheet can be quickly and stably placed between the copper-clad aluminum busbars to be welded. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram of the automatic feeding mechanism for brazing filler metal sheets of this utility model;

[0027] Figure 2 This is a partial side view of the automatic feeding mechanism for brazing filler metal sheets of this utility model;

[0028] Figure 3 This is a schematic diagram of the unloading roller structure of the automatic feeding mechanism for brazing filler metal sheets of this utility model;

[0029] Figure 4 This is a schematic diagram of the receiving groove structure of the automatic feeding mechanism for brazing filler metal sheets of this utility model;

[0030] Figure 5 This is a schematic diagram of the movable structure of the brazing filler metal tray of the automatic feeding mechanism for brazing filler metal sheets of this utility model;

[0031] Figure 6 This is the utility model Figure 5 A schematic diagram of the cross-section of the brazing filler groove;

[0032] Figure 7 This is an overall schematic diagram of the welding device of this utility model;

[0033] Figure 8 This is a schematic diagram of the electromagnetic induction welding head structure of the welding device of this utility model;

[0034] Figure 9 This is a schematic diagram of the pre-clamping mechanism of the welding device of this utility model;

[0035] Figure 10 This is a schematic diagram of the material transfer mechanism of the welding device of this utility model.

[0036] In the diagram: 100, feeding mechanism; 101, pushing assembly; 1011, stepper drive; 1012, pushing plate; 102, brazing filler groove; 1021, side plate; 1022, bottom plate; 1023, chute; 1024, fixing component; 103, unloading roller; 1031, burr protrusion; 104, unloading hole; 105, receiving groove; 1051, conveying component; 1052, drive roller; 106, sand plate; 200, first clamping block; 300, second clamping block; 400, laser welding head; 500, electromagnetic induction welding head; 501, cantilever; 600, pre-clamping mechanism; 601, lifting component; 602, brazing filler clamp; 700, material transfer mechanism; 701, robotic arm; 702, material transfer clamp; 800, control panel. Detailed Implementation

[0037] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0038] Example 1

[0039] like Figure 1 , Figure 2 As shown, the automatic feeding mechanism for brazing filler metal sheets in this embodiment includes:

[0040] The brazing filler groove 102 is used to vertically place the brazing filler sheet;

[0041] The pusher assembly 101 is located on one side of the brazing filler groove 102 and is used to push the brazing filler sheet in a stepping motion.

[0042] The feeding hole 104 is opened on the bottom wall of the brazing filler groove 102 and is used for vertical feeding of brazing filler sheets;

[0043] The feeding roller 103 is located on the other side of the brazing filler groove 102 and is used to vertically feed the brazing filler sheet into the feeding hole 104 when it rotates.

[0044] The receiving groove 105 is located below the brazing filler groove 102. It is used to receive the brazing filler sheet after it is unloaded and keep it in a vertical position to convey it to the workpiece welding position to complete the loading action.

[0045] In the above embodiment, a certain number of brazing filler metal sheets are placed in the brazing filler metal groove 102. The pusher assembly 101 pushes the sheet to make it come into close contact with the unloading roller 103. The pusher assembly 101 moves the thickness of one brazing filler metal sheet at a time. Each time the unloading roller 103 rotates, a brazing filler metal sheet is vertically inserted from the unloading hole 104 into a receiving groove 105. The receiving groove 105 moves the distance of one receiving groove at a time. The receiving groove 105 catches the unloaded brazing filler metal sheet and keeps it vertical, conveying it to the workpiece welding position to complete the loading action. During the unloading and movement of the brazing filler metal sheets, the sheets are always kept vertical. In the vertical unloading method, the brazing filler metal sheets fall one by one, making it less likely for them to accumulate or block each other. During the vertical unloading process, the brazing filler metal sheets are mainly subjected to gravity and slight air resistance, with relatively little friction and collision between the surface and other parts. Moreover, the brazing filler metal sheets remain vertical throughout the loading process, allowing the robotic arm to move only in the XY plane.

[0046] The opening width of the feeding hole 104 is greater than the thickness of one brazing filler metal sheet but less than the thickness of two brazing filler metal sheets, ensuring that only one brazing filler metal sheet enters the receiving groove 105 at a time. The width of the receiving groove 105 is less than the width of the brazing filler metal sheet.

[0047] It should be noted that the pusher assembly 101 includes a stepper drive 1011 and a pusher plate 1012 located at the drive end of the stepper drive 1011. The pusher plate 1012 pushes the brazing sheet to make it come into close contact with the feed roller 103. The stepper drive 1011 can be a cylinder, hydraulic cylinder or other device that can realize step propulsion, and there is no limitation here.

[0048] See Figure 3 One end of the feeding roller 103 is equipped with a driving device, preferably a servo motor. The surface of the feeding roller 103 is evenly provided with burr protrusions 1031 to increase the friction between the feeding roller 103 and the brazing filler metal sheet, so that the brazing filler metal sheet can smoothly enter the receiving groove 105.

[0049] See Figure 4 The receiving groove 105 is a U-shaped groove plate. The width of the receiving groove 105 is smaller than the width of the brazing filler plate. Several receiving grooves 105 are arranged on the circulating conveyor 1051. The bottom end of the receiving groove 105 is fixedly connected to the conveyor 1051. The conveyor 1051 achieves cyclic movement through several drive rollers 1052 arranged on the inner side, which can realize uninterrupted feeding. The conveyor 1051 here can be a conveyor belt, conveyor chain plate or other structures.

[0050] See Figure 5The solder groove 102 includes a base plate 1022 and two side plates 1021 located on the base plate 1022, which can limit the vertically arranged solder pieces. Furthermore, to enable the solder groove 102 to accommodate solder pieces of different sizes, at least two grooves 1023 are formed on both sides of the base plate 1022 along the stepping direction. The side plates 1021 are fixed to the grooves 1023 on the base plate 1022 by fasteners 1024, which can be bolts, fixing pins, etc. This allows the two side plates 1021 to be movably positioned above the base plate 1022. When the two side plates 1021 are close to each other, small-sized solder pieces are suitable; when they are far apart, large-sized solder pieces are suitable. When the side plate 1021 is movable, the two shaft ends of the feeding roller 102 can be moved and fixed on the side plate 1021; the lengths of the feeding roller 102 and the receiving groove 105 are both the minimum distance between the two side plates 1021; the length of the feeding hole 104 is the length of the largest size brazing filler metal sheet used.

[0051] Continue reading Figure 5 as well as Figure 6 Furthermore, in order to solve the problem that burrs on the edge of the brazing filler sheet may affect the welding of copper-clad aluminum busbars, a sanding plate 106 is provided on the upper and lower sides of the brazing filler sheet base plate 1022 and the inner side of the two side plates 1021. The base plate 1022 and the two side plates 1021 are extended in the stepping direction, so that the material groove 105 is covered more.

[0052] A certain number of brazing filler metal sheets are placed into the brazing filler metal groove 102. The pusher plate 1012 pushes the sheet so that the left, right, and lower edges of the brazing filler metal sheets come into contact with the abrasive plate 106. During the pushing process, the abrasive plate 106 polishes the brazing filler metal sheets. When the brazing filler metal sheets are fed into the receiving groove 105, the top of the brazing filler metal sheets is configured to be flush with the bottom of the brazing filler metal groove 102, so that the upper edge of the brazing filler metal sheets comes into contact with the abrasive plate 106 at the bottom of the base plate 1022. During the movement of the receiving groove 105, the upper edge is polished. Thus, all four edges of the brazing filler metal sheets, except for the two end surfaces, are polished, which can reduce burrs.

[0053] It should be noted that the brazing filler groove 102, the pusher assembly 101, and the receiving groove 105 are all mounted on the platform of the welding device via brackets.

[0054] Example 2

[0055] like Figure 7As shown, the welding device of this embodiment is used for welding copper-clad aluminum busbar workpieces. It includes a first clamping block 200, a second clamping block 300, a laser welding head 400, an electromagnetic induction welding head 500, and a control panel 800. The first clamping block 200 and the second clamping block 300 are arranged opposite to each other. The opposite end faces of the first clamping block 200 and the second clamping block 300 are respectively provided with clamping grooves. The clamping grooves are used to place the clamping end of the copper-clad aluminum busbar workpiece CCA (hereinafter referred to as workpiece CCA). The first clamping block 200 is provided with a distance adjustment device, and the second clamping block 300 is provided with a rotating motor. These are all technical solutions of existing welding devices. Moreover, the operation of this welding device is controlled by a PLC control module, which will not be described in detail here.

[0056] The welding apparatus of this embodiment includes the feeding mechanism 100 described in embodiment 1 and the transfer mechanism 700 located on one side of the feeding mechanism 100, which is used to transfer the brazing filler metal sheet from the receiving groove 105 to the copper-clad aluminum busbar workpiece to be welded.

[0057] See Figure 8 One end of the electromagnetic induction welding head 500 is provided with a cantilever 501 that slides along the length of the copper-clad aluminum busbar workpiece to be welded. The electromagnetic induction welding head 500 is in the form of a double-closed C-shape. Compared with the ring-shaped setting of the electromagnetic induction welding head 500 in the existing welding device, the C-shape in this embodiment does not require the workpiece CCA to be welded to pass through the ring-shaped electromagnetic induction welding head 500 before welding. This avoids obstruction of vision when the first clamping block 200 and the second clamping block 300 are adjusted. After the copper-clad aluminum busbar workpiece CCA to be welded is properly aligned, the electromagnetic induction welding head 500 can be rotated and turned over for electromagnetic welding.

[0058] See Figure 9 The pre-clamping mechanism 600, located below the workpiece to be welded copper-clad aluminum busbar, is used to support the workpiece and pre-clamp the brazing filler metal. The pre-clamping mechanism 600 includes a brazing filler metal clamp 602 and a lifting component 601. The lifting component 601 can be a cylinder, hydraulic cylinder, or other lifting device, which is not limited here.

[0059] See Figure 10 The material transfer mechanism 700 includes a robotic arm 701 and a material transfer fixture 702. The robotic arm 701 holds a piece of brazing filler metal from the receiving groove 105 and moves it in the XY plane between the copper-clad aluminum busbar workpieces to be welded. The width of the material transfer fixture 702 is less than the width of the brazing filler metal and greater than the width of the receiving groove. The height of the material transfer fixture 702 is much smaller than the height of the brazing filler metal.

[0060] In the above embodiment, after the workpiece CCA to be welded is placed in the clamping groove of the first clamping block 200 and the second clamping block 300, the pre-clamping mechanism 600 is moved so that the pre-clamping mechanism 600 is in the middle of the butt weld. The brazing filler clamp 602 rises and the bottom of the brazing filler clamp 602 is flush with the bottom of the workpiece CCA. The transfer clamp 702 clamps a piece of brazing filler from the receiving groove 105 and places it into the weld above the brazing filler clamp 602. Then the workpiece CCA clamped on the first clamping block 200 and the second clamping block 300 is adjusted so that the workpiece CCA is close to the brazing filler. Finally, the laser welding head 400 and the electromagnetic induction welding head 500 are used for welding.

[0061] It should be noted that both the transfer fixture 702 and the brazing filler fixture 602 are adjustable distance fixtures in the prior art, which are adjusted each time to fit the brazing filler sheet of the corresponding size.

[0062] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A brazing filler metal sheet automatic feeding mechanism characterized by comprising: a sheet feeding device; a sheet conveying device; a sheet cutting device; a sheet stacking device; and a sheet feeding control device. include: A solder groove is used to vertically place solder pieces. A pusher assembly, located on one side of the solder groove, is used to step and push the solder sheet; A feeding hole is provided on the bottom wall of the brazing filler groove for vertical feeding of the brazing filler sheet; The feeding roller, located on the other side of the brazing filler groove, is used to vertically feed the brazing filler sheet into the feeding hole when it rotates. The receiving groove, located below the brazing filler groove, is used to receive the brazing filler sheet after it is unloaded and to keep it in a vertical position for conveying it to the workpiece welding position to complete the loading action.

2. The automatic brazing filler metal sheet feeding mechanism according to claim 1, characterized in that, The feeding assembly includes a stepper driver and a feeding plate located at the driving end of the stepper driver.

3. The automatic brazing filler metal sheet feeding mechanism according to claim 1, characterized in that, The brazing filler groove includes: The base plate has at least two grooves on both sides along the stepping direction; There are two side plates, which are movably mounted above the base plate. The side plates are fixed to the sliding grooves on the base plate by fasteners.

4. The automatic brazing filler metal sheet feeding mechanism according to claim 3, characterized in that, The bottom plate is provided with sanding plates on the upper and lower sides and the inner sides of the two side plates for grinding the edges of the brazing filler metal sheet.

5. The automatic brazing filler metal sheet feeding mechanism according to claim 1, characterized in that, One end of the feeding roller is equipped with a driving device, and the surface of the feeding roller is evenly covered with burr protrusions.

6. The automatic brazing filler metal sheet feeding mechanism according to claim 1, characterized in that, The receiving trough is a U-shaped trough plate, and several receiving troughs are arranged on a cyclically moving conveyor. The conveyor moves cyclically through several drive rollers arranged on its inner side.

7. A welding apparatus for welding copper-clad aluminum busbars, comprising a first clamping block, a second clamping block, a laser welding head, an electromagnetic induction welding head, and a control panel, characterized in that, It also includes the feeding mechanism and the transferring mechanism as described in any one of claims 1-6; The material transfer mechanism, located on one side of the feeding mechanism, is used to transfer the brazing filler metal sheet from the receiving groove to the copper-clad aluminum busbar workpiece to be welded. The material transfer mechanism includes a robotic arm and a material transfer fixture.

8. A welding device according to claim 7, wherein It also includes a pre-clamping mechanism located below the copper-clad aluminum busbar workpiece to be welded, which is used to support the workpiece and pre-clamp the brazing filler metal. The pre-clamping mechanism includes a brazing filler metal clamp and a lifting component.

9. A welding device according to claim 8, wherein The electromagnetic induction welding head is a double-closed C-shape, and one end of the electromagnetic induction welding head is provided with a cantilever that slides along the length of the copper-clad aluminum busbar to be welded.

10. The welding device of claim 8, wherein, Both the material transfer fixture and the brazing fixture are adjustable-distance fixtures.

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