Aluminum bar manufactured through friction stir welding and friction stir welding equipment thereof

Abstract

The invention relates to the field of electrical connecting pieces, in particular to an aluminum bar manufactured through friction stir welding and friction stir welding equipment thereof.The aluminum bar comprises two connecting parts and a framework, the two connecting parts are located at the two ends of the framework respectively and connected with the framework, and the connecting parts are made of metal stable in chemical property; the framework is made of metal with a small density end, and a connecting hole is formed in the connecting part. According to the invention, the power strip has the effects of light weight and stability.

Description

Technical Field

[0001] The present application relates to the technical field of electrical connectors, and in particular to an aluminum bar made by stir friction welding and a stir friction welding device thereof. Background Art

[0002] With the development of new energy vehicles in my country, the requirements for lightweight vehicles are getting higher and higher. In addition, the competition for cost savings among major OEMs is becoming increasingly fierce. The automotive wiring harness industry is bound to develop towards low cost and lightweight.

[0003] Battery electrode connecting bars are commonly used electrical connectors in the field of automotive wiring harnesses. Specifically, multiple batteries of new energy vehicles are hard-connected through connecting bars, and the two ends of the connecting bars are fixed to the electrode sheets of the battery by screws. They mainly include copper bars and aluminum bars. Copper bars have stable chemical properties and high structural strength. Aluminum bars are light in weight and low in cost, but their properties are not stable enough and are prone to electrochemical corrosion when used.

[0004] How to reduce the mass of the connecting bar and ensure the stability of the connecting bar itself during use is a major research hotspot in the automotive industry. Summary of the invention

[0005] In order to reduce the mass of the connecting bar and ensure the stability of the automobile wiring harness terminal during use, the present application provides an aluminum bar made by stir friction welding and a stir friction welding device thereof.

[0006] on the one hand

[0007] The present application provides an aluminum bar made by friction stir welding and a friction stir welding device thereof, which adopts the following technical solutions:

[0008] An aluminum bar made by stir friction welding comprises a connecting part and a frame, wherein the connecting part is provided with two connecting parts, which are respectively located at two ends of the frame and connected to the frame, the connecting part is made of a metal with stable chemical properties, the frame is made of a metal with a small density, and a connecting hole is opened on the connecting part.

[0009] By adopting the above technical solution, when the wire row is used, the two connecting parts correspond to the two electrodes, screws are inserted into the connecting holes, the screws are threadedly connected to the electrodes and press the connecting parts to realize the connection between the wire row and the electrodes. The connecting parts are made of metal with stable chemical properties, so that the wire row is not prone to electrochemical corrosion. The skeleton is made of metal with low density to control the overall quality of the wire row, so that the wire row has the advantages of stability and light weight.

[0010] On the other hand, the present application provides a friction stir welding device that adopts the following technical solution:

[0011] A friction stir welding device comprises a machine platform, a spindle system mounted on the machine platform and a stirring head mounted on the spindle system, wherein the spindle system comprises a mounting frame mounted on the machine platform and two vertically arranged rotating shafts mounted on the mounting frame, wherein the two rotating shafts are arranged in parallel and spaced apart in the horizontal direction, and the vertical distance between the axes of the two rotating shafts is the same as the length of the skeleton, the stirring head is arranged with two corresponding rotating shafts and is mounted on the rotating shafts, and the rotation of the rotating shafts can drive the stirring head to rotate.

[0012] By adopting the above technical solution, the rotation of the rotating shaft drives the stirring head to rotate, and the distance between the two rotating shafts is equal to the length of the frame, so that the ends of the two stirring heads can correspond to the gap (connecting seam) between the connecting part and the frame. By moving between the wire row and the stirring head, the synchronous welding of the two connecting parts can be achieved, thereby improving the production efficiency of the wire row.

[0013] Optionally, the spindle system also includes an adjustment component, which includes two adjustment columns arranged corresponding to the rotating shafts, the adjustment columns are slidably connected to the mounting frame in a horizontal direction, the two rotating shafts are respectively rotatably connected to the two adjustment columns, and the sliding adjustment column can drive the two adjustment columns to move closer to or away from each other.

[0014] By adopting the above technical solution, the sliding adjustment column makes the two adjustment columns approach or move away from each other, thereby changing the distance between the two rotating shafts to achieve welding of wire rows of different specifications.

[0015] Optionally, the spindle system further includes a linkage component, the linkage component includes a pulley and a belt ring, two pulleys are provided corresponding to the rotating shaft, and the belt is wrapped around the two pulleys.

[0016] By adopting the above technical solution, the two rotating shafts can rotate synchronously through the friction between the pulley and the belt ring.

[0017] Optionally, the spindle system also includes an adaptation component, defining a plane coinciding with the two rotating axes as a mid-plane, and the adaptation component includes a stabilizing wheel, which is arranged on one side of the mid-plane and can move in a direction perpendicular to the mid-plane, and the stabilizing wheel is located inside the belt loop.

[0018] By adopting the above technical solution, when the two rotating shafts approach or move away from each other, the tension of the belt can be adjusted by moving the position of the stabilizing wheel to maintain the friction between the belt and the pulley, thereby improving the stability of the rotating shaft during rotation.

[0019] Optionally, the adaptation component also includes two rotating rods, the ends of the two rotating rods that are close to each other are rotatably connected, and the ends of the two rotating rods that are away from each other are respectively rotatably connected to two adjustment columns, and the stabilizing wheel is rotatably connected to the end of the rotating rod away from the adjustment column.

[0020] By adopting the above technical solution, when the two adjustment columns approach or move away from each other, the rotating rod rotates relatively, thereby automatically driving the stabilizing wheel to approach or move away from the neutral plane, maintaining the friction between the pulley and the belt.

[0021] Optionally, a fixture is provided on the workbench, and the fixture includes a fixed block, a contoured groove for placing the workpiece is provided on the fixed block, a receiving cavity is provided inside the fixed block, a preheating component is provided in the receiving cavity, and the preheating component is used to heat the workpiece.

[0022] By adopting the above technical solution, a profiling groove is provided on the fixed block, which can limit the workpiece (here, the wire row) and improve the stability of the wire row welding process. At the same time, the preheating component heats the workpiece, which is convenient for the stirring head to weld the workpiece.

[0023] Optionally, the preheating assembly includes a coil and an iron core, the iron core is arranged below the contoured slot, and the coil is wound around the outside of the iron core.

[0024] By adopting the above technical solution, when the coil is passed through an alternating current, eddy currents can be generated in the iron core, thereby generating heat in the iron core to heat the workpiece. At the same time, a changing magnetic field is generated at both ends of the iron core, generating an induced current in the workpiece, which can stir the material during the welding process under the action of electromagnetic force, thereby improving the welding effect.

[0025] Optionally, the iron core can slide in a vertical direction, and a thermal deformation part is provided at the end of the iron core close to the ground. The thermal deformation part is arranged in a direction perpendicular to the iron core and one end is connected to the iron core. When the thermal deformation part is heated, the end away from the iron core can bend downward.

[0026] By adopting the above technical solution, under normal conditions, the iron core is located far away from the workpiece. When the workpiece needs to be welded, the temperature of the iron core rises, the thermal deformation part deforms, and abuts against the side wall of the receiving groove close to the ground. Under the interaction between the thermal deformation part and the side wall of the receiving groove, the iron core moves up to the workpiece to heat the workpiece. At the same time, after the coil is powered off, the iron core moves down away from the workpiece to increase the speed of cooling the workpiece.

[0027] Optionally, the iron core can slide in a direction horizontally and perpendicular to the length direction of the contoured groove, and an accompanying component is arranged in the accommodating chamber, the accompanying component includes a fixed cylinder and a piston, the piston is slidably fitted in the fixed cylinder, the iron core is connected to the piston, the fixed cylinder is filled with a thermal expansion liquid, and the fixed cylinder can exchange heat with the workpiece.

[0028] By adopting the above technical solution, during the welding process, the iron core can move along the length direction of the connection seam, and the material at the connection seam of the workpiece can be heated by moving the iron core, thereby improving the overall welding effect. At the same time, the iron core heats the workpiece, and the fixed tube is heated after the workpiece is heated up. As the thermal expansion liquid expands, it can drive the iron core to move, so that the iron core automatically moves with the movement of the stirring head, further improving the welding effect. In addition, after the workpiece is removed, the cold contraction of the thermal expansion part can drive the iron core to automatically reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the line array of an embodiment of the present application.

[0030] Figure 2 It is a schematic diagram of the overall structure of the friction stir welding equipment of an embodiment of the present application.

[0031] Figure 3 It is a schematic diagram of the structure of the spindle system of an embodiment of the present application.

[0032] Figure 4 It is a schematic diagram of the structure of the clamp of an embodiment of the present application.

[0033] Figure 5 This is an embodiment of the present application Figure 4 Enlarged view of part A.

[0034] Figure 6 It is a schematic diagram of the structure of the preheating component of an embodiment of the present application.

[0035] Figure 7 It is a schematic diagram of the connecting piece structure of an embodiment of the present application.

[0036] Figure 8 It is a schematic diagram of the accompanying component structure of an embodiment of the present application.

[0037] Figure numerals: 1, connecting part; 11, connecting hole; 2, frame; 21, insulating layer; 3, machine; 31, workbench; 4, spindle system; 41, mounting frame; 42, rotating shaft; 43, adjusting component; 431, adjusting column; 432, adjusting rod; 44, linkage component; 441, pulley; 442, belt loop; 45, adaptation component; 451, rotating rod; 452, stabilizing wheel; 5, clamp; 51, fixing block; 52, contoured groove ; 53. Accommodating chamber; 6. Preheating assembly; 61. Coil; 62. Iron core; 63. Thermal deformation member; 64. Heat conducting member; 65. Avoidance groove; 66. Transition member; 661. First connecting ring; 662. Second connecting ring; 663. Transition tube; 67. Mounting tube; 7. Accompanying assembly; 71. Fixed tube; 72. Piston; 73. Cache shell; 74. Connecting member; 741. Cross bar; 742. Vertical bar; 743. Connecting rod; 8. Stirring head. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-8 This application is described in further detail.

[0039] The present application discloses an aluminum bar made by stir friction welding

[0040] Reference Figure 1 , an aluminum busbar made by stir friction welding, comprising a connecting part 1 and a skeleton 2. Two connecting parts 1 are provided, and the two connecting parts 1 are respectively provided on both sides of the skeleton 2, and the connecting part 1 is used to contact and connect with the electrode sheet of a battery or other equipment. The skeleton 2 is used to connect the two connecting parts 1. In this embodiment, the skeleton 2 is a rectangular plate-like structure. In other embodiments, the skeleton 2 can be set to other shapes according to actual conditions, such as Z-type, L-type, etc., the connecting part 1 is made of copper, and the skeleton 2 is made of aluminum. During the use of the busbar, the copper connecting part 1 contacts the electrode, and the stability of its own chemical properties is utilized to reduce the electrochemical corrosion of the busbar. At the same time, the aluminum skeleton 2 is used to reduce the overall mass of the busbar, thereby achieving the goal of reducing the mass of the busbar while effectively ensuring the stability of the busbar during use.

[0041] Reference Figure 1 The connecting part 1 and the frame 2 are both plate-shaped structures with equal thickness, and the two are connected by friction welding. The frame 2 is wrapped with an insulating layer 21, and in this embodiment, the insulating layer 21 is rubber. The connecting part 1 is provided with a connecting hole 11 for inserting a screw.

[0042] The implementation principle of the aluminum bar made by friction stir welding in the embodiment of the present application is as follows: the bar is divided into two parts, wherein the part in contact with the electrode, i.e. the connecting part 1, is made of a metal with stable chemical properties to reduce the electrochemical corrosion during the use of the bar. The frame 2 is made of a light metal material to control the overall quality of the bar.

[0043] The present application also discloses a friction stir welding device.

[0044] Reference Figure 2 and Figure 3 A friction stir welding device comprises a machine table 3, a spindle system 4 and a stirring head 8. The stirring head 8 is mounted on the spindle system 4, and the spindle system 4 is used to drive the stirring head 8 to rotate. A workbench 31 is arranged on the machine table 3, and the workbench 31 is used to place a workpiece. During the wire row welding process, the connection part 1 is placed at both ends of the skeleton 2, and the connection part 1 is abutted against the skeleton 2. Then the spindle system 4 drives the stirring head 8 to rotate at a high speed and gradually approaches the wire row. Until the welding needle on the stirring head 8 drills into the gap between the connection part 1 and the skeleton 2, and the shoulder of the stirring head 8 is in close contact with the surface of the connection part 1 and the surface of the skeleton 2. The heat generated by the friction between the welding needle on the stirring head 8 and the surrounding parent material and the heat generated by the friction between the shoulder of the stirring head 8 and the surface of the weldment work together to increase the temperature of the material at the joint (the gap between the connection part 1 and the skeleton 2) and soften it. Then the stirring head 8 or the wire row moves along the length of the gap between the connection part 1 and the frame 2, and the softened material flows to the rear of the stirring head 8 relative to the moving direction of the workpiece, forming a dense and firm welding joint, thereby realizing the welding between the connection part 1 and the frame 2.

[0045] Reference Figure 2 and Figure 3 The spindle system 4 includes a mounting frame 41 and two rotating shafts 42. The mounting frame 41 is mounted on the machine table 3 and can be raised and lowered and moved in the horizontal direction. The rotating shaft 42 is vertically mounted on the mounting frame 41 and can rotate around its own axis. The two rotating shafts 42 are arranged in parallel and spaced apart in the horizontal direction, and the vertical distance between the axes of the two rotating shafts 42 is equal to the length dimension of the skeleton 2. The stirring head 8 is installed below the rotating shaft 42. The rotating shaft 42 and the stirring head 8 can be fixed by a three-jaw chuck (not shown in the figure), or by other clamping methods. During the wire row welding process, the stirring heads 8 on the two rotating shafts 42 correspond to the two connecting seams, and then the workbench 31 or the spindle system 4 can be moved by the electronic control system of the stir friction welding device to achieve synchronous welding between the two connecting parts 1 and the skeleton 2, thereby improving the welding efficiency of the wire row.

[0046] Reference Figure 2 and Figure 3The spindle system 4 also includes an adjustment component 43, which includes two adjustment columns 431 arranged corresponding to the rotating shaft 42, and the adjustment column 431 is slidably connected to the mounting frame 41 along the horizontal direction. A through hole is opened in the adjustment column 431 corresponding to the rotating shaft 42, and the rotating shaft 42 is rotatably fitted in the through hole. The sliding adjustment column 431 can make the two adjustment columns 431 approach or move away from each other, thereby driving the two rotating shafts 42 to approach or move away from each other, so that the friction welding device can weld wire rows of different specifications.

[0047] Reference Figure 2 and Figure 3 The adjustment component 43 also includes an adjustment rod 432, which is arranged along the sliding direction of the adjustment column 431. The adjustment rod 432 is arranged between the two adjustment columns 431. The two ends of the adjustment rod 432 are respectively threadedly connected to the two adjustment columns 431. Rotating the adjustment rod 432 can drive the two adjustment columns 431 to move closer to or farther from each other synchronously, thereby realizing the adjustment of the position of the adjustment column 431.

[0048] Reference Figure 2 and Figure 3 The spindle system 4 also includes a linkage assembly 44, which includes a pulley 441 and a belt ring 442. The pulleys 441 are arranged to correspond to the rotating shaft 42. The pulleys 441 are fixedly sleeved on the rotating shaft 42, and the belt ring 442 is arranged around the two pulleys 441 to realize the synchronous rotation of the two rotating shafts 42. The linkage assembly 44 also includes an adaptation assembly 45, which includes two rotating rods 451 arranged corresponding to the adjustment column 431. One end of the rotating rod 451 is rotatably connected to the adjustment column 431, and the rotation axis between the rotating rod 451 and the adjustment column 431 is parallel to the axis of the rotating shaft 42. The ends of the two rotating rods 451 away from the adjustment column 431 are close to each other and rotatably connected to each other. The adaptation assembly 45 also includes a stabilizing wheel 452, which is coaxial with the rotation axis between the two rotating rods 451 and is rotatably connected to the rotating rod 451. The plane coinciding with the axes of the two rotating shafts 42 is defined as the mid-plane, and the adaption assembly 45 is symmetrically arranged in two groups about the mid-plane. The belt loop 442 is wound around the two stabilizing wheels 452 and the two pulleys 441 at the same time. When the two adjustment columns 431 approach each other, the rotating rod 451 drives the two stabilizing wheels 452 to move away from each other. When the two adjustment columns 431 move away from each other, the two stabilizing wheels 452 approach each other, so that the belt loop 442 and the pulley 441 can be kept in a tensioned state, thereby improving the stability of the rotating shaft 42 during rotation.

[0049] Reference Figure 2 and Figure 4A fixture 5 for placing the wire row is provided on the workbench 31, and the fixture 5 includes a fixing block 51, and the fixing block 51 is fixed on the workbench 31. A profiling groove 52 corresponding to the entire wire row is provided on the fixture 5, and the wire row can be embedded in the profiling groove 52, so as to limit the position of the wire row and improve the stability of the connecting part 1 and the frame 2 during the welding process.

[0050] Reference Figure 4 and Figure 5 , a receiving chamber 53 is provided inside the fixed block 51 at the position corresponding to the two connecting seams of the wire row, and a preheating assembly 6 is arranged inside the receiving chamber 53. The preheating assembly 6 includes a coil 61 and an iron core 62. The iron core 62 is vertically arranged in the receiving chamber 53, and the coil 61 is wound outside the iron core 62. The position of the iron core 62 corresponds to the profiling groove 52. After the wire row is embedded in the profiling groove 52, the iron core 62 corresponds to the connecting part 1 between the connecting part 1 and the skeleton 2, so that the position where the skeleton 2 and the connecting part 1 are connected can be preheated, so that the stirring head 8 can weld the wire row. On the other hand, the alternating current flows through the coil 61, and the two ends of the iron core 62 generate a changing magnetic field, which can generate an induced current in the wire row. Under the action of the electromagnetic force, the softened material can move, achieve the effect of stirring, and improve the effect of friction welding.

[0051] Reference Figure 4 and Figure 5 The iron core 62 can move along its own length direction, and the sliding iron core 62 can make it close to or away from the contoured groove 52. When the wire bar needs to be heated, the iron core 62 is moved close to the wire bar to increase the speed of heating the wire bar, thereby improving production efficiency. After the wire bar is welded, the iron core 62 is controlled to be away from the wire bar, so as to speed up the cooling speed of the wire bar and facilitate the disassembly of the wire bar.

[0052] Reference Figure 4 and Figure 6 The preheating assembly 6 also includes a mounting tube 67, which is a cylindrical structure with two ends open. The mounting tube 67 is mounted on the side wall of the accommodating cavity 53, and is slidably sleeved on the iron core 62 to enable the iron core 62 to slide in the vertical direction. The preheating assembly 6 also includes a thermal deformation member 63, which is a sheet-like structure as a whole and is arranged perpendicular to the length of the iron core 62. One end of the thermal deformation member 63 is connected to the side of the iron core 62 close to the ground, and the other end abuts against the side wall of the accommodating cavity 53.

[0053] Reference Figure 4 and Figure 6When the thermal deformation member 63 is heated, the end thereof away from the iron core 62 can bend toward the ground. Then, under the interaction between the thermal deformation member 63 and the side wall of the accommodating cavity 53, the iron core 62 can be driven to move away from the ground, that is, toward the direction close to the wire row. In the actual welding process, the coil 61 is energized, and eddy currents are generated in the iron core 62, and the temperature of the iron core 62 rises accordingly. The temperature rise of the iron core 62 can be transmitted to the thermal deformation member 63, and then the thermal deformation member 63 automatically deforms to drive the iron core 62 close to the wire row, thereby heating the wire row. After the welding of the wire row is completed, the coil 61 is de-energized and the temperature of the iron core 62 decreases. Then, the thermal deformation member 63 drives the iron core 62 to move downward, so that the iron core 62 is away from the wire row.

[0054] Reference Figure 4 and Figure 6 In this embodiment, the thermal deformation member 63 is a bimetallic strip (a composite material composed of two or more metals or other materials with suitable properties, each layer has a different thermal expansion coefficient. When the temperature changes, the deformation of the active layer is greater than the deformation of the passive layer, so that the bimetallic strip as a whole will bend toward the passive layer).

[0055] Reference Figure 6 and Figure 7 A transition piece 66 is provided between the thermal deformation piece 63 and the iron core 62. The transition piece 66 includes a first connecting ring 661, a second connecting ring 662 and a transition tube 663. The first connecting ring 661 and the second connecting ring 662 are both annular structures. The first connecting ring 661 is attached to and fixedly connected to the end surface of the iron core 62. The second connecting ring 662 is arranged below the first connecting ring 661, and the outer side wall of the second connecting ring 662 is larger than the diameter of the iron core 62. The transition tube 663 is a truncated cone-shaped structure as a whole, one end of which is connected to the first connecting ring 661, and the other end is connected to the second connecting ring 662. The thermal deformation piece 63 is connected by the transition piece 66, which provides a larger installation space for the thermal deformation piece 63 and facilitates heat exchange between the thermal deformation piece 63 and the iron core 62.

[0056] Reference Figure 6 and Figure 7 A through hole connected to the accommodating cavity 53 is provided on the side wall of the profiling groove 52, and the through hole is filled with a heat conductor 64, which is made of an insulating material with a good thermal conductivity, such as alumina ceramic. When the iron core 62 slides, the end face can fit with the heat conductor 64 to transfer heat to the wire row. At the same time, the heat conductor 64 can better support the wire row to cope with the axial force of the wire row after the stirring head 8 abuts against the wire row.

[0057] Reference Figure 4 and Figure 5, at room temperature, the thermal deformation member 63 is perpendicular to the iron core 62, and an avoidance groove 65 is provided on the side wall of the accommodating cavity 53 at a position corresponding to the thermal deformation member 63, and the thermal deformation member 63 is in the avoidance groove 65. The avoidance groove 65 has sliding grooves on both side walls parallel to the length direction of the thermal deformation member 63, and a cylindrical adjustment column 431 is provided at the position of the thermal deformation member 63 corresponding to the sliding groove. One end of the adjustment column 431 away from the thermal deformation member 63 is inserted into the sliding groove, and the length direction of the sliding groove is parallel to the ground. The adjustment column 431 can slide in the sliding groove to adapt to the relative movement of the adjustment column 431 during the deformation process of the thermal deformation member 63.

[0058] Reference Figure 4 and Figure 5 The installation tube 67 can slide in a direction perpendicular to the length direction of the profiling groove 52, thereby driving the iron core 62 to move, so that the iron core 62 can heat different positions of the wire row in a targeted manner. The length direction of the thermal deformation member 63 is parallel to the sliding direction of the installation tube 67, and the length direction of the avoidance groove 65 corresponds to the thermal deformation member 63. One end of the thermal deformation member 63 is placed in the avoidance groove 65, which can limit the rotation of the iron core 62 and improve the stability of the iron core 62 during the movement.

[0059] Reference Figure 4 and Figure 8 , the accommodating chamber 53 is also provided with an accompanying component 7 for driving the installation cylinder 67 to move, and the accompanying component 7 includes a fixed cylinder 71 and a piston 72. The piston 72 is slidably fitted in the fixed cylinder 71, and the fixed cylinder 71 is filled with a heat expansion liquid, which is mercury in this embodiment. The piston 72 is connected to the installation cylinder 67, and the fixed cylinder 71 is located near the contour groove 52. In the actual welding process, the coil 61 is energized, the iron core 62 generates heat and moves upward, abutting against the heat conductor 64, and then the wire row is heated, and the heat is transferred to the fixed cylinder 71 after the wire row is heated. Then the mercury expands and drives the piston 72 to move. At this time, the piston 72 can drive the installation cylinder 67 to move automatically, realizing the automatic movement of the installation cylinder 67. As the iron core 62 continuously heats different positions of the wire row, the mercury absorbs more and more heat, and continuously expands to drive the piston 72 to move. Then the coil 61 is powered off, the wire row is cooled, and the piston 72 is driven to reset, so that the installation cylinder 67 is automatically reset for welding again.

[0060] Reference Figure 4 and Figure 8 The accompanying component 7 also includes a buffer shell 73, which is arranged above the fixed cylinder 71. The inside of the buffer shell 73 is hollow and filled with mercury. The inside of the buffer shell 73 is connected to the inside of the fixed cylinder 71, and the mercury inside the buffer shell 73 can enter the fixed cylinder 71 to push the piston 72 to move. The buffer shell 73 is flush with the side wall of the profiling groove 52 close to the ground, and the line row can fit with the buffer shell 73 after being placed in the profiling groove 52.

[0061] Reference Figure 4 and Figure 8 A connecting piece 74 is provided between the piston 72 and the mounting cylinder 67, and the connecting piece 74 includes a cross bar 741, a vertical bar 742, and a connecting rod 743. Two vertical bars 742 are provided, and the two vertical bars 742 are provided on both sides of the fixed cylinder 71 in a direction horizontally and perpendicular to the sliding direction of the mounting cylinder 67, and are slidably connected with the fixed cylinder 71. The cross bar 741 is provided at one end of the fixed cylinder 71 and is located between the two vertical bars 742. The two ends of the cross bar 741 are integrally formed with the two vertical bars 742 to form a U-shaped structure. The connecting rod 743 is provided between the piston 72 and the cross bar 741, and its two ends are fixedly connected to the piston 72 and the cross bar 741 respectively. The connection between the piston 72 and the mounting cylinder 67 is realized.

[0062] Reference Figure 4 and Figure 5 The accompanying components 7 are arranged in two groups, and the two groups of accompanying components 7 are respectively arranged on both sides of the trajectory line of the sliding direction of the installation cylinder 67. The two groups of accompanying components 7 drive the installation cylinder 67 to move from both sides of the installation cylinder 67, thereby improving the stability of the installation cylinder 67 during the movement.

[0063] Reference Figure 4 and Figure 8 A connecting pipe is provided between the cache shells 73 in the two groups of accompanying components 7, and the two ends of the connecting pipe are respectively connected to the inside of the two cache shells 73 to make the pressure in the two cache shells 73 equal, thereby improving the uniformity of the force on the installation cylinder 67 and further improving the stability of the installation cylinder 67 during movement.

[0064] The implementation principle of a friction stir welding device in an embodiment of the present application is as follows: two rotating shafts 42 drive two stirring heads 8 to rotate, and the two stirring heads 8 simultaneously perform friction stir welding on two connecting parts 1, thereby improving the efficiency of wire row welding forming.

[0065] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An aluminum bar made by friction stir welding, characterized in that: The invention comprises a connecting part (1) and a frame (2), wherein the connecting part (1) is provided in two parts, the two connecting parts (1) are respectively located at two ends of the frame (2) and connected to the frame (2), the connecting part (1) is made of a metal with stable chemical properties, the frame (2) is made of a metal with low density, and a connecting hole (11) is provided on the connecting part (1).

2. A friction stir welding device for welding the aluminum bar as claimed in claim 1, comprising a machine platform (3), a spindle system (4) mounted on the machine platform (3) and a stirring head (8) mounted on the spindle system (4), characterized in that: The spindle system (4) comprises a mounting frame (41) mounted on the machine platform (3) and two vertically arranged rotating shafts (42) mounted on the mounting frame (41); the two rotating shafts (42) are arranged in parallel and spaced apart in the horizontal direction, and the vertical distance between the axes of the two rotating shafts (42) is the same as the length of the skeleton (2); the stirring head (8) is provided with two corresponding rotating shafts (42) and is mounted on the rotating shafts (42); the rotation of the rotating shafts (42) can drive the stirring head (8) to rotate.

3. A friction stir welding device according to claim 2, characterized in that: The spindle system (4) also includes an adjustment component (43), the adjustment component (43) includes two adjustment columns (431) arranged corresponding to the rotating shaft (42), the adjustment column (431) is slidably connected to the mounting frame (41) in a horizontal direction, the two rotating shafts (42) are rotatably connected to the two adjustment columns (431), and the sliding adjustment column (431) can drive the two adjustment columns (431) to move closer to or farther away from each other.

4. A friction stir welding device according to claim 3, characterized in that: The spindle system (4) further comprises a linkage assembly (44), wherein the linkage assembly (44) comprises a pulley (441) and a belt ring (442), wherein two pulleys (441) are arranged corresponding to the rotating shaft (42), and the belt ring (442) is wound around the two pulleys (441).

5. A friction stir welding device according to claim 4, characterized in that: The spindle system (4) also includes an adaptation component (45), which defines a plane coinciding with the two rotating shafts (42) as a mid-plane, and the adaptation component (45) includes a stabilizing wheel (452), which is arranged on one side of the mid-plane and can move in a direction perpendicular to the mid-plane, and the stabilizing wheel (452) is located inside the belt loop (442).

6. A friction stir welding device according to claim 5, characterized in that: The adapting assembly (45) further comprises two rotating rods (451), the ends of the two rotating rods (451) being close to each other are rotatably connected, the ends of the two rotating rods (451) being away from each other are rotatably connected to two adjusting columns (431) respectively, and the stabilizing wheel (452) is rotatably connected to the ends of the rotating rods (451) away from the adjusting columns (431).

7. A friction stir welding device according to claim 2, characterized in that: A fixture (5) is arranged on the workbench (31), and the fixture (5) comprises a fixed block (51), and a contoured groove (52) for placing a workpiece is provided on the fixed block (51), and a receiving cavity (53) is provided inside the fixed block (51), and a preheating component (6) is arranged in the receiving cavity (53), and the preheating component (6) is used to heat the workpiece.

8. A friction stir welding device according to claim 7, characterized in that: The preheating component (6) comprises a coil (61) and an iron core (62), wherein the iron core (62) is arranged below the contoured slot (52), and the coil (61) is wound around the outside of the iron core (62).

9. A friction stir welding device according to claim 8, characterized in that: The iron core (62) is capable of sliding in a vertical direction. A thermal deformation member (63) is provided at one end of the iron core (62) close to the ground. The thermal deformation member (63) is provided in a direction perpendicular to the iron core (62) and one end is connected to the iron core (62). When heated, the end of the thermal deformation member (63) away from the iron core (62) can bend downward.

10. The friction stir welding equipment according to claim 8, characterized in that: The iron core (62) can slide in a direction horizontally and perpendicular to the length direction of the contoured groove (52); a companion component (7) is arranged in the accommodating cavity (53); the companion component (7) comprises a fixed cylinder (71) and a piston (72); the piston (72) is slidably fitted in the fixed cylinder (71); the iron core (62) is connected to the piston (72); the fixed cylinder (71) is filled with a thermal expansion liquid; and the fixed cylinder (71) can perform heat exchange with a workpiece.

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