Method for friction stir welding of multiple pieces of conductive copper busbar to copper wire and auxiliary welding device

Abstract

The application discloses a kind of multi-piece conductive copper bar and copper wire friction stir welding method and auxiliary welding device, it is related to electric joint welding technical field, wherein welding method includes: step one, the end of multiple copper wires is solidified to form end solidified copper wire;Step two, multiple end solidified copper wires are sequentially arranged side by side and are correspondingly arranged copper bar on the side of solidified end, form multiple butt joints, copper bar is clamped between every adjacent two butt joints;Step three, after the friction stir welding of multiple butt joints, multiple copper bars, arc guide plate and arc receiving plate, arc guide plate and arc receiving plate are cut off, and multiple side-by-side welding joints are separated from copper bar place.The application further provides an auxiliary welding device to assist welding, the scheme provided by the application can improve welding efficiency.

Description

Technical Field

[0001] This invention relates to the field of electrical connector welding technology, and in particular to a method and auxiliary welding device for friction stir welding of multiple conductive copper busbars and copper wires. Background Technology

[0002] With the rapid growth in electricity demand and the increase in power load, electrical components require a large number of conductive copper busbars and copper wires to connect to the power supply input and load terminals to ensure the reliability of the power system. For example, patent CN202210941115.5 discloses a welding joint of conductive copper busbar and multi-strand copper wire and a friction stir welding method, providing a welding method and apparatus for friction extrusion forming of multi-strand copper wire wrapped in copper foil and copper busbar. However, this apparatus can only weld a single joint, resulting in low efficiency and failing to meet the requirements of modern enterprises for large-scale industrial production. Summary of the Invention

[0003] The purpose of this invention is to provide a method and auxiliary welding device for friction stir welding of multiple conductive copper busbars and copper wires, so as to solve the problems existing in the prior art and improve the efficiency of friction stir welding.

[0004] To achieve the above objectives, the present invention provides the following solution:

[0005] This invention provides a method for friction stir welding of multiple conductive copper busbars and copper wires, comprising:

[0006] Step 1: Curing the ends of multi-strand copper wires to form end-cured copper wires;

[0007] Step 2: Arrange multiple copper wires with cured ends side by side in sequence and set copper busbars one by one on one side of the cured ends to form multiple docking parts. A copper strip is sandwiched between each pair of adjacent docking parts.

[0008] Step 3: After performing friction stir welding on the multiple mating parts, the multiple copper strips, the arc-starting plate and the arc-ending plate, cut off the arc-starting plate and the arc-ending plate, and separate the multiple parallel welded joints from the copper strips.

[0009] Preferably, in step one, multiple strands of copper wire are placed in a pressing machine, and resistance welding is used to press and weld their ends to form copper wires with solidified ends.

[0010] Preferably, the arc-starting plate and the arc-ending plate are made of copper.

[0011] The present invention also provides an auxiliary welding device, comprising: a support member and a clamping member. The support member is provided with a station for placing copper busbars, end-cured copper wires, an arc-starting plate, and an arc-ending plate. Multiple end-cured copper wires are arranged side by side in sequence, and copper busbars are arranged one-to-one on one side of the cured ends to form multiple mating parts. A copper strip is clamped between each pair of adjacent mating parts. The clamping member is used to press and fix the copper busbars, end-cured copper wires, arc-starting plate, and arc-ending plate onto the support member.

[0012] Preferably, the support member is a support plate, and the work station is formed on the front side of the support plate. The work station for placing the copper wire is the first work station, and multiple first work stations are arranged side by side. A partition is fixedly arranged between adjacent first work stations.

[0013] Preferably, the clamping component is provided with three types: a first clamping unit, a second clamping unit, and a third clamping unit; the first clamping unit is used to clamp the copper wire, the second clamping unit is used to clamp the copper busbar, and the third clamping unit is used to clamp the arc-starting plate and the arc-ending plate.

[0014] The first, second, and third clamping units each include a fixing member and a clamping bolt disposed on the front side of the support plate. The fixing member is fixedly disposed on the front side of the support plate. The copper wire, the copper busbar, the arc-initiating plate, and the arc-reducing plate are disposed between the fixing member and the support plate. The clamping bolt is disposed perpendicular to the support plate and threadedly connected to the fixing member. Rotating the clamping bolt allows the clamping bolt to move closer to or away from the support plate to achieve the purpose of clamping the corresponding components.

[0015] Preferably, the first clamping unit and the second clamping unit further include a pad, wherein the pad in the first clamping unit is disposed between the plurality of copper wires and the clamping bolts, and the pad in the second clamping unit is disposed between the plurality of copper busbars and the clamping bolts.

[0016] Preferably, it further includes a side clamping unit, which includes a side clamping bolt. The front side of the support plate near both ends is provided with a boss. The work station is located between two of the bosses. The arc-starting plate and the arc-ending plate are respectively provided on both sides of the joint of the plurality of copper busbars and the copper wire. The side clamping bolt is threaded to the boss along a direction parallel to the extension of the plurality of copper busbars. The side clamping bolt is threaded to both bosses. The side clamping bolts on the two bosses can respectively abut against the arc-starting plate and the arc-ending plate and press the arc-starting plate and the arc-ending plate against the copper wire and the side of the copper wire between them.

[0017] Preferably, a pressure rod is also threadedly connected to the boss, the pressure rod is parallel to the side clamping bolt, and the pressure rod is used to clamp the copper busbar and the copper wire.

[0018] Preferably, the front side of the support plate is provided with a through groove for the stirring head to move, and the through groove is directly opposite the docking part.

[0019] The present invention achieves the following technical effects compared to the prior art:

[0020] The solution provided by this invention enables simultaneous welding of multiple joints, thereby improving production efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A flowchart of a friction stir welding method for multiple conductive copper busbars and copper wires provided in Example 1;

[0023] Figure 2 This is a schematic diagram of the auxiliary welding device provided in Embodiment 2;

[0024] Figure 3 for Figure 2 The front view;

[0025] Figure 4 This is a schematic diagram of the structure after the copper wires, copper busbars, copper strips, arc-starting plates, and arc-ending plates, after the ends have been cured, are arranged on the workstation.

[0026] Figure 5 This is a structural schematic diagram of the support component;

[0027] Figure 6 This is a schematic diagram showing the arrangement of copper wires, copper busbars, and copper strips after end curing.

[0028] Figure 7 This is a schematic diagram of the structure of the copper wire after end curing;

[0029] In the diagram: 1-End-cured copper wire; 2-Copper busbar; 3-Copper strip; 4-Supporting component; 5-First clamping unit; 6-Second clamping unit; 7-Third clamping unit; 8-Arc-initiating plate; 9-Arc-terminating plate; 10-Fixing component; 11-Clamping bolt; 12-Pad; 13-Partition plate; 14-Through groove; 15-Boss; 16-Pressure rod; 17-Side clamping bolt. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] This embodiment provides a method for friction stir welding of multiple conductive copper busbars and copper wires, such as... Figure 1 As shown, it includes:

[0034] Step 1: Curing the ends of multi-strand copper wires to form end-cured copper wire 1; preferably, resistance welding is used to press the ends of the copper wires together. Specifically, multi-strand copper wires are placed in a pressing machine, and resistance welding is used to press the ends together to form end-cured copper wire 1.

[0035] Step 2: Arrange multiple copper wires 1 with their ends cured side by side in sequence, and set copper busbars 2 one by one on one side of the cured ends to form multiple docking parts. A copper strip 3 is sandwiched between each pair of adjacent docking parts.

[0036] Step 3: After performing friction stir welding on multiple butt joints, multiple copper strips 3, arc-starting plate 8 and arc-ending plate 9, cut off the arc-starting plate 8 and arc-ending plate 9, and separate the multiple parallel welded joints from the copper strips 3.

[0037] The embodiments of the present invention achieve the purpose of welding multiple joints simultaneously. There is no limit to the specific number of joints, which can be set according to needs.

[0038] In this embodiment of the invention, before step one, the copper busbar 2, copper wire and copper strip 3 to be welded need to be wiped with acetone or alcohol to remove surface oil stains, and the surface burrs of the weld need to be removed with a file or trimmer to ensure good flatness.

[0039] In this embodiment of the invention, the arc-initiating plate 8 and the arc-terminating plate 9 are made of copper.

[0040] To assist in welding according to Embodiment 1, the present invention also provides the following embodiments:

[0041] Example 2

[0042] This embodiment provides an auxiliary welding device, such as... Figures 1 to 7As shown, it includes: a support member 4 and a clamping member. The support member 4 is provided with a station for placing copper busbars 2, end-cured copper wires 1, arc-starting plates 8 and arc-ending plates 9. Multiple end-cured copper wires 1 are arranged side by side in sequence, and copper busbars 2 are arranged one-to-one on one side of the cured ends to form multiple mating parts. A copper strip 3 is clamped between each pair of adjacent mating parts. The clamping member is used to press and fix the copper busbars 2, end-cured copper wires 1, arc-starting plates 8 and arc-ending plates 9 onto the support member 4.

[0043] In this embodiment, the support member 4 is used to provide support, the clamping member is used to clamp the various components, and the auxiliary welding device provided in this embodiment is used to clamp the copper busbar 2, the end-cured copper wire 1, the arc-starting plate 8, and the arc-ending plate 9 to facilitate the friction stir welding process.

[0044] In the above embodiments, the support member 4 only needs to be able to support each component, and the clamping member only needs to be able to clamp each component. Therefore, the embodiments of the present invention do not limit the structure of the support member 4 or the clamping mechanism of the clamping member.

[0045] There are various types of support members 4 that can provide support. In some embodiments, the support member 4 is a support plate. A work station is formed on the front of the support plate. The first work station is used to place copper wires. Multiple first work stations are arranged side by side. A partition 13 is fixedly arranged between adjacent first work stations. The partition 13 is integrally formed with the support plate. The partition 13 is used to isolate each copper wire. Here, copper wire refers to a cluster composed of multiple strands of copper wire.

[0046] In some embodiments, the clamping components are provided in three types: a first clamping unit 5, a second clamping unit 6, and a third clamping unit 7; the first clamping unit 5 is used to clamp the copper wire, the second clamping unit 6 is used to clamp the copper busbar 2, and the third clamping unit 7 is used to clamp the arc-starting plate 8 and the arc-ending plate 9.

[0047] The first clamping unit 5, the second clamping unit 6, and the third clamping unit 7 each include a fixing member 10 and a clamping bolt 11 disposed on the front side of the support plate. The fixing member 10 is fixedly disposed on the front side of the support plate. The copper wire, copper busbar 2, arc-inducing plate 8, and arc-extinguishing plate 9 are disposed between the fixing member 10 and the support plate. The clamping bolt 11 is disposed perpendicular to the support plate and threadedly connected to the fixing member 10. Rotating the clamping bolt 11 can make the clamping bolt 11 approach or move away from the support plate to achieve the purpose of clamping the corresponding components.

[0048] Multiple clamping bolts 11 can be provided. In order to improve the clamping effect, the first clamping unit 5 and the second clamping unit 6 also include a pad 12. The pad 12 in the first clamping unit 5 is disposed between multiple copper wires and clamping bolts 11, and the pad 12 in the second clamping unit 6 is disposed between multiple copper busbars 2 and clamping bolts 11.

[0049] In some embodiments, the auxiliary welding device provided by the present invention further includes a side clamping unit, which includes a side clamping bolt 17. A boss 15 is provided on the front side of the support plate near both ends. The work station is located between two bosses 15. An arc-starting plate 8 and an arc-ending plate 9 are respectively provided on both sides of the multiple copper busbars 2 and the copper wire docking part. The side clamping bolt 17 is threaded to the boss 15 along the direction parallel to the extension of the multiple copper busbars 2. The two bosses 15 are threaded with side clamping bolts 17. The side clamping bolts 17 on the two bosses 15 can respectively abut against the arc-starting plate 8 and the arc-ending plate 9 and press the arc-starting plate 8 and the arc-ending plate 9 against the copper wire and the side of the copper wire between them.

[0050] Considering that copper wire and copper busbar 2 are placed between the two bosses 15, it is impossible for the total width of the copper wire and the total width of the copper busbar 2 to be exactly the same as the distance between the two bosses 15. Therefore, the bosses 15 are unlikely to effectively limit the copper busbar 2 and copper wire. Therefore, in this embodiment of the invention, a pressure rod 16 is also threadedly connected to the bosses 15. The pressure rod 16 is parallel to the side clamping bolt 17 and is used to clamp the copper busbar 2 and copper wire. In total, there are four pressure rods 16, with pressure rods 16 provided on both sides of the copper wire and both sides of the copper busbar 2.

[0051] In some embodiments, the front side of the support plate is provided with a through groove 14 for the stirring head to move, and the through groove 14 is directly opposite the docking part. The through groove 14 allows the stirring head to move.

[0052] The steps for welding using auxiliary equipment are as follows:

[0053] Step 1: Wipe the copper busbar 2, copper wire and copper strip 3 to be welded with acetone or alcohol to remove surface oil and dirt. Use a file or trimmer to remove burrs from the weld surface to ensure good flatness.

[0054] Step 2: The copper wire to be welded is subjected to resistance welding and pressing to form a copper wire with cured ends.

[0055] Step 3: Place the copper busbar 2 to be welded and the end-cured copper wire on the support plate, and at the same time put in the copper strip 3 to align the ends of the copper busbar 2 and the copper wire.

[0056] Step 4: Fix the pad 12 above the workpiece to be welded and tighten it by means of the clamping bolts 11 in the first clamping unit 5 and the second clamping unit 6. Fix the arc-starting plate 8 and the arc-ending plate 9 to the side of the workpiece to be welded and tighten them by means of the clamping bolts 11 in the third clamping unit 7. Then tighten the pressure rod 16 to press the side of the workpiece to be welded. At this time, the workpiece to be welded is positioned in the required position and the assembly is completed.

[0057] Step 5: Weld the workpiece according to the welding process and its process path.

[0058] Step 6: After welding, release the backing plate 12, the arc-starting plate 8, the arc-ending plate 9, and the pressure rod 16.

[0059] Step 7: Cut off the arc-starting plate 8, the arc-ending plate 9, and the copper strip 3 to form a conductive copper busbar 2 and a copper wire friction stir welded joint.

[0060] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An auxiliary welding device, characterized in that: Friction stir welding of conductive copper busbars and copper wires includes: a support and a clamping component. The support has stations for placing copper busbars, end-cured copper wires, an arc-starting plate, and an arc-ending plate. Multiple end-cured copper wires are arranged side-by-side, with copper busbars corresponding to each end on one side of the cured ends, forming multiple mating portions. A copper strip is clamped between each pair of adjacent mating portions. The clamping component is used to press and fix the copper busbars, end-cured copper wires, arc-starting plate, and arc-ending plate onto the support. The support is a support plate, and the stations are formed on its front side. The first station is for placing the copper wires, and multiple first stations are arranged side-by-side. A partition is fixedly installed between adjacent first stations. The clamping component has three types: The system comprises a first clamping unit, a second clamping unit, and a third clamping unit. The first clamping unit is used to clamp the copper wire, the second clamping unit is used to clamp the copper busbar, and the third clamping unit is used to clamp the arc-starting plate and the arc-ending plate. Each of the first, second, and third clamping units includes a fixing member and a clamping bolt disposed on the front side of the support plate. The fixing member is fixedly disposed on the front side of the support plate. The copper wire, the copper busbar, the arc-starting plate, and the arc-ending plate are disposed between the fixing member and the support plate. The clamping bolt is disposed perpendicular to the support plate and threadedly connected to the fixing member. Rotating the clamping bolt allows it to move closer to or away from the support plate to achieve the purpose of clamping the corresponding components. It also includes a side clamping unit, which includes a side clamping bolt. The front of the support plate near both ends is provided with a boss. The work station is located between two bosses. The arc-starting plate and the arc-ending plate are respectively provided on both sides of the joint of the multiple copper busbars and the copper wire. The side clamping bolt is threaded to the boss along the arrangement direction of the multiple copper busbars. The side clamping bolt is threaded to both bosses. The side clamping bolts on the two bosses can respectively abut against the arc-starting plate and the arc-ending plate, and press the arc-starting plate and the arc-ending plate against the sides of the copper wire and the copper busbar between them. A pressure rod is also threadedly connected to the boss. The pressure rod is parallel to the side clamping bolt and is used to clamp the copper busbar and the copper wire.

2. The auxiliary welding device according to claim 1, characterized in that: The first clamping unit and the second clamping unit further include a pad. The pad in the first clamping unit is disposed between the plurality of copper wires and the clamping bolts, and the pad in the second clamping unit is disposed between the plurality of copper busbars and the clamping bolts.

3. The auxiliary welding device according to claim 1, characterized in that: The front of the support plate is provided with a through groove for the stirring head to move, and the through groove is directly opposite the docking part.

4. A method for friction stir welding of multiple conductive copper busbars and copper wires, characterized in that: The welding is performed using the auxiliary welding apparatus according to any one of claims 1 to 3, comprising: Step 1: Curing the ends of multi-strand copper wires to form end-cured copper wires; Step 2: Arrange multiple copper wires with cured ends side by side in sequence and set copper busbars one by one on one side of the cured ends to form multiple docking parts. A copper strip is sandwiched between each pair of adjacent docking parts. Step 3: After performing friction stir welding on the multiple mating parts, the multiple copper strips, the arc-starting plate and the arc-ending plate, cut off the arc-starting plate and the arc-ending plate, and separate the multiple parallel welded joints from the copper strips.

5. The friction stir welding method for multiple conductive copper busbars and copper wires according to claim 4, characterized in that: In step one, multiple strands of copper wire are placed into a pressing machine, and resistance welding is used to press and weld the ends of the wires to form copper wires with solidified ends.

6. The method for friction stir welding of multiple conductive copper busbars and copper wires according to claim 4, characterized in that: The arc-starting plate and the arc-ending plate are made of copper.

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