A friction stir welding auxiliary device with preheating function

Abstract

The utility model relates to welding technical field especially relates to a kind of preheating function's friction stir welding auxiliary device.A kind of preheating function's friction stir welding auxiliary device, including rack, cylinder, guide rail, sliding table, mounting plate, heating rod, heat block, rack left side middle part is fixedly connected with cylinder, rack upper portion both sides are fixedly connected with guide rail, two guide rails right side between slidingly connected with sliding table, the telescopic rod of cylinder right side is fixedly connected with sliding table, sliding table top slidingly connected with four mounting plates, every mounting plate inside is fixedly connected with two heating rods, every mounting plate inside is fixedly connected with heat block, corresponding heat block will corresponding two heating rods be wrapped.The utility model is transferred heat while clamping workpiece by clamping block, integrates clamping and preheating function, simplifies technological process, improves heat energy utilization efficiency, shortens preheating time, is favorable for promoting overall welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to an auxiliary device for friction stir welding with preheating function. Background Technology

[0002] Friction stir welding (FSW) is an advanced solid-state joining technology. Since its invention by the Welding Institute (TWI) in the early 1990s, it has been widely used in high-end manufacturing fields such as aerospace, rail transportation, shipbuilding, and new energy vehicles due to its advantages such as no melting of materials during welding, low heat input, small welding deformation, high joint strength, and no smoke and arc pollution. It is especially suitable for welding lightweight alloy materials such as aluminum alloys and magnesium alloys.

[0003] However, friction stir welding also faces some technical challenges in practical applications. When welding thick plates, high-melting-point alloys, or operating in low-temperature environments, the initial temperature is low, making it difficult for the stirring head to quickly generate sufficient frictional heat in the weld initiation area to fully plasticize the material. This can easily lead to defects such as keyholes, incomplete penetration, uneven flash, or excessive load on the stirring head, affecting joint quality and equipment lifespan. Furthermore, for long welds or complex structures, the heat accumulation varies in different areas of the weld, easily causing uneven microstructure and properties. Currently, to address these issues, increasing the spindle speed or downforce is often used to increase heat input, but this may lead to accelerated wear of the stirring head, material overheating, or new problems such as hot cracking.

[0004] Therefore, it is necessary to design an auxiliary device for friction stir welding with preheating function to solve the above problems. Utility Model Content

[0005] To overcome the drawbacks of uneven heating and accelerated wear of the stirring head, this utility model provides an auxiliary device for friction stir welding with preheating function.

[0006] The technical solution is as follows: A friction stir welding auxiliary device with preheating function, comprising a frame, a cylinder, guide rails, a slide, mounting plates, heating rods, heat-conducting blocks, clamping blocks, positive and negative threaded rods, and a crank handle. A cylinder is fixedly connected to the middle of the left side of the frame. Guide rails are fixedly connected to the front and rear sides of the upper part of the frame. A slide is slidably connected between the right sides of the two guide rails. The telescopic rod on the right side of the cylinder is fixedly connected to the slide. Four mounting plates are slidably connected to the top of the slide. Two heating rods are fixedly connected to the inner side of each mounting plate. A heat-conducting block is fixedly connected to the inner side of each mounting plate. The corresponding heat-conducting block wraps around the corresponding two heating rods. A clamping block is fixedly connected to the center end of every two mounting plates. The corresponding clamping block contacts the corresponding heat-conducting block. A positive and negative threaded rod is rotatably connected to the middle of the slide. The left and right sides of the positive and negative threaded rods are two sets of threads in opposite directions. The lower parts of the four mounting plates are threadedly connected to the positive and negative threaded rods. A crank handle is fixedly connected to the left side of the positive and negative threaded rods.

[0007] In a preferred embodiment of the present invention, a rubber ring is also included, and the handle is fitted with the rubber ring.

[0008] In a preferred embodiment of this utility model, it further includes a mounting base, a mounting rod, and a spring. Two mounting bases are fixedly connected to the front and rear sides of the top of the slide table. The four mounting bases are slidably connected to the mounting rods near the center end. A spring is connected between the corresponding mounting rod and the mounting base at the end away from the center end. The corresponding spring is set on the corresponding mounting rod.

[0009] In a preferred embodiment of the present invention, the device further includes a guide rod, a top block, and a second spring. Each mounting rod is slidably connected to the guide rod on both the left and right sides. A top block is fixedly connected between every two guide rods on the same side near the center end. Two second springs are connected between the corresponding top block and the corresponding mounting rod, and the corresponding second spring is sleeved on the corresponding guide rod.

[0010] In a preferred embodiment of the present invention, a wedge block is also included. The wedge block is fixedly connected to both the front and rear sides of the top of the frame, and the wedge block slides in contact with the mounting rod.

[0011] In a preferred embodiment of this utility model, a cooling fan is also included, with cooling fans fixedly connected to both the left and right sides of the rear end of the frame.

[0012] Beneficial effects: 1. This utility model transfers heat while clamping the workpiece through the clamping block, integrating clamping and preheating functions, simplifying the process, improving the efficiency of heat energy utilization, shortening the preheating time, and helping to improve the overall welding efficiency.

[0013] 2. This utility model drives the forward and reverse threaded rods to rotate by turning the rocker handle, so that the mounting plates on both sides of the slide move synchronously in opposite directions. It can flexibly adjust the clamping width to adapt to the preheating and welding requirements of workpieces of different sizes, and significantly improve the versatility and ease of operation of the equipment.

[0014] 3. By setting up symmetrical clamping and heating devices on the left and right sides, and cooperating with the reciprocating movement of the slide table, preheating, welding and cooling operations can be performed alternately, realizing continuous cyclic operation of the left and right workstations, which significantly improves equipment utilization and production efficiency.

[0015] 4. This utility model uses a cylinder to drive the slide table to move along the guide rail. By utilizing the cooperation between the wedge block on the top of the frame and the mounting rod, the top block is pushed to move automatically towards the center under the guidance of the guide rod. Combined with the elastic action of spring one and spring two, the workpiece is automatically centered and flexibly clamped, avoiding rigid extrusion that could cause workpiece deformation or damage, and ensuring positioning accuracy. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional sectional view of the cylinder, guide rail, and slide of this utility model.

[0018] Figure 3 This is a three-dimensional sectional view of the components of this utility model, including the top block, guide rod, and mounting rod.

[0019] Figure 4 This is a three-dimensional structural diagram of the wedge block, cooling fan, and frame of this utility model.

[0020] The markings in the attached diagram are: 1-frame, 2-cylinder, 3-guide rail, 4-slide table, 5-mounting plate, 6-heating rod, 61-heat conducting block, 7-clamping block, 8-positive and negative threaded rod, 9-handle, 10-rubber ring, 11-mounting base, 12-spring one, 121-spring two, 13-mounting rod, 14-guide rod, 15-top block, 16-wedge block, 17-cooling fan. Detailed Implementation

[0021] Example: An auxiliary device for friction stir welding with preheating function, such as... Figures 1-4As shown, the assembly includes a frame 1, a cylinder 2, guide rails 3, a slide table 4, mounting plates 5, heating rods 6, heat-conducting blocks 61, clamping blocks 7, forward and reverse threaded rods 8, and a crank handle 9. The cylinder 2 is mounted on the middle left side of the frame 1. Guide rails 3 are bolted to both the front and rear sides of the upper part of the frame 1. A slide table 4 is slidably connected between the right sides of the two guide rails 3. The telescopic rod on the right side of the cylinder 2 is fixedly connected to the slide table 4. Four mounting plates 5 are slidably connected to the top of the slide table 4. The four mounting plates 5 are symmetrically arranged in pairs. Each mounting plate 5 has a... Two heating rods 6 are provided. Each mounting plate 5 has a heat-conducting block 61 on its inner side. The corresponding heat-conducting block 61 wraps around the two heating rods 6. Each pair of mounting plates 5 is fixedly connected to a clamping block 7 near the center end. The corresponding clamping block 7 contacts the corresponding heat-conducting block 61. A positive and negative threaded rod 8 is rotatably connected to the middle of the slide table 4. The left and right sides of the positive and negative threaded rod 8 have two sets of threads in opposite directions. The lower parts of the four mounting plates 5 are threaded to the positive and negative threaded rod 8. A rocker handle 9 is welded to the left side of the positive and negative threaded rod 8.

[0022] like Figure 2 and Figure 3 As shown, it also includes a rubber ring 10, and the handle 9 is fitted with a rubber ring 10.

[0023] like Figure 3 As shown, it also includes a mounting base 11, a mounting rod 13, and a spring 12. Two mounting bases 11 are fixedly connected to the front and rear sides of the top of the slide table 4. The mounting rods 13 are slidably connected to the four mounting bases 11 near the center end. The corresponding mounting rods 13 are connected to the mounting bases 11 with springs 12 at the ends away from the center end. The corresponding springs 12 are sleeved on the corresponding mounting rods 13.

[0024] like Figure 3 As shown, it also includes a guide rod 14, a top block 15, and a second spring 121. Each mounting rod 13 is slidably connected to the guide rod 14 on both the left and right sides. A top block 15 is fixedly connected between every two guide rods 14 on the same side near the center end. Two second springs 121 are connected between the corresponding top block 15 and the corresponding mounting rod 13. The corresponding second spring 121 is sleeved on the corresponding guide rod 14.

[0025] like Figure 1 and Figure 4 As shown, it also includes a wedge block 16. The front and rear sides of the top of the frame 1 are fixedly connected with wedge blocks 16 by bolts, and the wedge blocks 16 slide in contact with the mounting rod 13.

[0026] like Figure 1 and Figure 4 As shown, it also includes a cooling fan 17. The cooling fan 17 is fixedly connected to the left and right sides of the rear end of the frame 1 by bolts, and the air outlet of the cooling fan 17 faces the slide table 4.

[0027] When preheating the workpiece for friction stir welding is required, the operator first turns the crank handle 9, causing the connected positive and negative threaded rods 8 to rotate. Each pair of threaded mounting plates 5 on the slide table 4 slides synchronously away from the center, thus adjusting the distance between the two mounting plates 5 to accommodate workpieces or welding areas of different widths. Rubber rings 10 are fitted onto the crank handle 9 to provide anti-slip and shock absorption. Then, the workpiece to be welded is placed between the two mounting plates 5 on the left side of the slide table 4 and between the two mounting plates 5 on the right side of the slide table 4. The cylinder 2 is then activated, causing the slide table 4 to move to the right along the guide rail 3. As the slide table 4 moves, the wedge-shaped blocks 16 on the front and rear sides of the top of the frame 1 contact the mounting rod 13, pushing the mounting rod 13 to move towards the center end against the elastic force of spring 12. This, in turn, drives the top block 15 at the front end to move forward under the guidance of the guide rod 14. Under the action of spring 121, the top block 15 flexibly contacts the side of the workpiece, achieving automatic centering and light clamping, ensuring the workpiece remains stable during preheating and subsequent welding, and preventing displacement. Then, the heating rods 6 are activated. The two heating rods 6 in each mounting plate 5 generate heat, which is evenly transferred to the clamping block 7 through the highly thermally conductive heat-conducting block 61. Turn the crank handle 9 to adjust the position of the mounting plate 5, which in turn drives the four mounting plates 5 and four clamping blocks 7 on the slide table 4 to clamp the workpiece. The clamping blocks 7 transfer heat to the workpiece for preheating treatment, allowing the workpiece to reach a suitable temperature. After preheating, the operator performs friction stir welding on the workpiece on the left side through the frame 1. After the treatment is completed, the cylinder 2 is started to move the slide table 4 to the left along the guide rail 3. The springs 12 and 2121 on the left side drive the mounting rod 13 and the top block 15 to reset. The mounting rod 13 and the top block 15 on the right side perform flexible centering and light clamping on the workpiece. The heating rod 6 on the left side is turned off, and then the heating rod 6 on the left side is started again. The cooling fan 17 provides forced air cooling to the surface of the workpiece on the left, accelerating the cooling rate, shortening the process cycle, and preventing excessive heat diffusion from affecting the surrounding area. While the workpiece on the left is being cooled, friction stir welding can be performed on the workpiece on the right. After the process is completed, the crank handle 9 is turned to move the clamping blocks 7 and mounting plates 5 on both sides to release the workpiece, allowing the cooled workpiece on the left to be removed. Then, the heating rod 6 on the left is turned off, and the cylinder 2 is started to move the slide table 4 to the right along the guide rail 3. Then, the cooling fan 17 on the right is started to provide forced air cooling to the surface of the workpiece on the right. After cooling, the workpiece is removed, improving work efficiency.

Claims

1. An auxiliary device for friction stir welding with preheating function, characterized in that: The machine includes a frame (1), a cylinder (2), a guide rail (3), a slide (4), a mounting plate (5), a heating rod (6), a heat-conducting block (61), a clamping block (7), a positive and negative threaded rod (8), and a crank handle (9). The cylinder (2) is fixedly connected to the middle left side of the frame (1). The guide rails (3) are fixedly connected to the front and rear sides of the upper part of the frame (1). The slide (4) is slidably connected between the right sides of the two guide rails (3). The telescopic rod on the right side of the cylinder (2) is fixedly connected to the slide (4). Four mounting plates (5) are slidably connected to the top of the slide (4). Two mounting plates (5) are fixedly connected to the inner side of each mounting plate (5). Heating rod (6), each mounting plate (5) has a heat-conducting block (61) fixedly connected to its inner side, the corresponding heat-conducting block (61) wraps around the corresponding two heating rods (6), each pair of mounting plates (5) has a clamp (7) fixedly connected near the center end, the corresponding clamp (7) contacts the corresponding heat-conducting block (61), the middle of the slide table (4) is rotatably connected to a positive and negative threaded rod (8), the left and right sides of the positive and negative threaded rod (8) are two sets of threads in opposite directions, the lower parts of the four mounting plates (5) are threadedly connected to the positive and negative threaded rod (8), and the left side of the positive and negative threaded rod (8) is fixedly connected to a rocker handle (9).

2. The friction stir welding auxiliary device with preheating function according to claim 1, characterized in that: It also includes a rubber ring (10), and the handle (9) is fitted with a rubber ring (10).

3. The friction stir welding auxiliary device with preheating function according to claim 2, characterized in that: It also includes a mounting base (11), a mounting rod (13) and a spring (12). Two mounting bases (11) are fixedly connected to the front and rear sides of the top of the slide table (4). The mounting rods (13) are slidably connected to the four mounting bases (11) near the center end. The corresponding mounting rods (13) are connected to the mounting bases (11) at the ends away from the center end by a spring (12). The corresponding springs (12) are sleeved on the corresponding mounting rods (13).

4. The friction stir welding auxiliary device with preheating function according to claim 3, characterized in that: It also includes guide rods (14), top blocks (15) and springs (121). Each mounting rod (13) is slidably connected to guide rods (14) on both the left and right sides. Top blocks (15) are fixedly connected between every two guide rods (14) on the same side near the center end. Two springs (121) are connected between the corresponding top blocks (15) and the corresponding mounting rods (13). The corresponding springs (121) are sleeved on the corresponding guide rods (14).

5. The friction stir welding auxiliary device with preheating function according to claim 4, characterized in that: It also includes wedge blocks (16), with wedge blocks (16) fixedly connected to the front and rear sides of the top of the frame (1), and the wedge blocks (16) slidingly contacting the mounting rod (13).

6. The friction stir welding auxiliary device with preheating function according to claim 5, characterized in that: It also includes a cooling fan (17), and the cooling fan (17) is fixedly connected to the left and right sides of the rear end of the frame (1).

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