Hydraulic jig for friction stir welding

Abstract

The utility model discloses a kind of hydraulic jigs for friction stir welding, including bottom plate, the bottom plate middle part is equipped with backing plate, the top of the backing plate is equipped with support block around, the backing plate middle part is equipped with support plate, the support block is used to support product edge, the backing plate is used to support product middle part, the bottom plate is equipped with several product compression units and several weld bead compression units, the product compression unit is used to press product edge in support block, the weld bead compression unit is used to press product middle part on backing plate;The utility model's hydraulic jigs for friction stir welding adopts product compression unit, weld bead compression unit and window compression unit, through the first pressure plate, second pressure plate and third pressure plate of oil cylinder drive firmly fixed product on support block and support plate, using the incompressible characteristics of liquid, so that the pressure of oil cylinder does not appear attenuation, guarantee workpiece clamping force stable and reliable, to improve welding accuracy.

Description

Technical Field

[0001] This utility model relates to automotive parts processing technology, specifically a hydraulic fixture for friction stir welding. Background Technology

[0002] Friction stir welding (FSW) is a solid-state welding technology that has seen rapid development in recent years due to the increasing demand for high-quality welding in industries such as aerospace and automotive manufacturing. Currently, FSW has not only significantly improved welding speed and joint strength but has also optimized automation and welding efficiency. With the development of intelligent monitoring and remote data transmission technologies, FSW design increasingly emphasizes the integration of these technologies to enhance welding quality and production efficiency.

[0003] Currently, most friction stir welding in the industry uses pneumatic tooling fixtures to fix products. Although welding can be completed, the pressure of the pneumatic tooling is easily affected by fluctuations in the air source. Under continuous load, pressure may decrease, resulting in unstable workpiece clamping force. This is especially true in long weld seams, where cumulative errors can occur, affecting welding accuracy. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a hydraulic fixture for friction stir welding, which provides stable and reliable workpiece clamping force and improves welding accuracy.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solution: a hydraulic fixture for friction stir welding, comprising a base plate, a pad in the middle of the base plate, support blocks around the top of the pad, a support plate in the middle of the pad, the support blocks supporting the edge of the product, the pad supporting the middle of the product, the base plate having a plurality of product pressing units and a plurality of weld pressing units, the product pressing units pressing the edge of the product onto the support blocks, and the weld pressing units pressing the middle of the product onto the pad.

[0006] Preferably, the base plate is provided with an oil passage plate, which has a plurality of oil delivery channels. The oil passage plate is located below the pad plate, the product pressing unit, the weld pressing unit, and the window pressing unit.

[0007] Preferably, the base plate is provided with an oil collecting block, which is located on one side of the oil circuit plate. The oil collecting block is provided with a plurality of control channels, which are connected to the oil delivery channels.

[0008] Preferably, the product pressing unit includes a hydraulic cylinder, a hinge block, and a first pressure plate. The hydraulic cylinder is fixed to the oil circuit plate and is connected to the oil delivery channel. The top end of the piston rod of the hydraulic cylinder is hinged to one end of the first pressure plate. The middle part of the first pressure plate is hinged to the top end of the hinge block. The bottom end of the hinge block is hinged to the hydraulic cylinder. The other end of the first pressure plate is provided with a first pressure head.

[0009] Preferably, the weld bead clamping unit includes a hydraulic cylinder, a hinge block, and a second pressure plate. The hydraulic cylinder is fixed to the hydraulic circuit plate and communicates with the oil supply channel. The top end of the piston rod of the hydraulic cylinder is hinged to one end of the second pressure plate. The middle part of the second pressure plate is hinged to the top end of the hinge block. The bottom end of the hinge block is hinged to the hydraulic cylinder. A second pressure head is provided at the other end of the second pressure plate. A proximity switch is provided on one side of the second pressure plate. The proximity switch is used to sense the second pressure plate.

[0010] Preferably, a window clamping unit is provided on one side of the base plate. The window clamping unit includes a hydraulic cylinder, a hinge block, and a third pressure plate. The hydraulic cylinder is fixed to the oil circuit plate and is connected to the oil delivery channel. The top of the piston rod of the hydraulic cylinder is hinged to one end of the third pressure plate. The middle part of the third pressure plate is hinged to the top of the hinge block. The bottom end of the hinge block is hinged to the hydraulic cylinder. A third pressure head is provided at the other end of the third pressure plate. A proximity switch is provided on one side of the third pressure plate. The proximity switch is used to sense the third pressure plate.

[0011] Preferably, the pad is provided with guide pins around its perimeter, and the guide pins are fixed to the oil circuit plate.

[0012] Preferably, the base plate has several lifting lugs on both sides.

[0013] In summary, this utility model achieves the following technical effects: This utility model discloses a hydraulic fixture for friction stir welding, which employs a product clamping unit, a weld clamping unit, and a window clamping unit. The first, second, and third pressure plates are driven by hydraulic cylinders to firmly fix the product to the support block and the support plate. By utilizing the incompressible properties of liquids, the pressure of the hydraulic cylinder will not decrease, ensuring stable and reliable workpiece clamping force, thereby improving welding accuracy. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the hydraulic fixture for friction stir welding according to this utility model; Figure 2 This is a schematic diagram of the product clamping unit of the hydraulic fixture for friction stir welding according to this utility model; Figure 3 This is a schematic diagram of the weld bead clamping unit of the hydraulic fixture for friction stir welding of this utility model; Figure 4This is a schematic diagram of the window clamping unit of the hydraulic fixture for friction stir welding of this utility model; Figure 5 This is a schematic diagram of the product fixing state of the hydraulic fixture for friction stir welding according to this utility model; Instruction manual drawing reference numerals: 1. Base plate; 2. Oil circuit plate; 3. Oil collection block; 4. Pad plate; 5. Support block; 6. Support plate; 7. Product clamping unit; 71. First pressure plate; 8. Weld clamping unit; 81. Second pressure plate; 82. Second pressure head; 9. Window clamping unit; 91. Third pressure plate; 92. Third pressure head; 10. Guide pin; 11. Lifting lug; 12. Proximity switch; 13. Hydraulic cylinder; 14. Hinge block; 15. Product. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0017] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] Example 1: like Figure 1 , 5 As shown, a hydraulic fixture for friction stir welding includes a base plate 1, a pad 4 in the middle of the base plate 1, support blocks 5 around the top of the pad 4, a support plate 6 in the middle of the pad 4, the support blocks 5 supporting the edges of a product 15, the pad 4 supporting the middle of the product 15, the base plate 1 having a plurality of product 15 clamping units 7 and a plurality of weld bead clamping units 8, the product 15 clamping units 7 pressing the edges of the product 15 against the support blocks 5, and the weld bead clamping units 8 pressing the middle of the product 15 against the pad 4; wherein the support plate 6 and the support blocks 5 are both fixed to the pad 4 by fastening bolts.

[0022] Product 15 includes a cavity, a cavity cover, and a window. Product 15 clamping unit 7 presses the cavity onto support block 5, weld clamping unit 8 presses the cavity cover onto the cavity, and window clamping unit 9 is used to press the cavity cover onto the cavity after avoiding the window.

[0023] The hydraulic fixture for friction stir welding in this embodiment employs a product 15 clamping unit 7, a weld bead clamping unit 8, and a window clamping unit 9. The first clamping plate 71, the second clamping plate 81, and the third clamping plate 91 are driven by the hydraulic cylinder 13 to firmly fix the product 15 onto the support block 5 and the support plate 6. Utilizing the incompressible properties of liquids, the fixture can provide a uniform and constant clamping force, effectively resisting the lateral torque and axial pressure generated by the high-speed rotation of the stirring head. This avoids minor displacement of the workpiece during welding, has a strong rigidity advantage, ensures welding quality, and improves welding efficiency.

[0024] The base plate 1 is provided with an oil passage plate 2, which has several oil supply channels. The oil passage plate 2 is located below the pad plate 4, the product 15 clamping unit 7, the weld clamping unit 8, and the window clamping unit 9. The oil passage plate 2 supplies oil to the oil cylinder 13 through the oil supply channels, thereby providing hydraulic oil circulation for the entire tooling. Each oil supply channel corresponds to the oil cylinder 13. The oil supply channels are connected to an external hydraulic system.

[0025] The base plate 1 is provided with an oil collecting block 3, which is located on one side of the oil circuit plate 2. The oil collecting block 3 is provided with several control channels, which are connected to the oil delivery channels. The control channels can adjust the amount of hydraulic oil in the oil delivery channels to achieve the effect of hydraulic control.

[0026] like Figure 2 As shown, the product 15 pressing unit 7 includes a hydraulic cylinder 13, a hinge block 14, and a first pressure plate 71. The hydraulic cylinder 13 is fixed to the oil circuit plate 2 and is connected to the oil supply channel. The top end of the piston rod of the hydraulic cylinder 13 is hinged to one end of the first pressure plate 71. The middle part of the first pressure plate 71 is hinged to the top end of the hinge block 14. The bottom end of the hinge block 14 is hinged to the hydraulic cylinder 13. The other end of the first pressure plate 71 is provided with a first pressure head.

[0027] like Figure 3 As shown, the weld bead clamping unit 8 includes a hydraulic cylinder 13, a hinge block 14, and a second pressure plate 81. The hydraulic cylinder 13 is fixed to the oil circuit plate 2 and is connected to the oil supply channel. The top end of the piston rod of the hydraulic cylinder 13 is hinged to one end of the second pressure plate 81. The middle part of the second pressure plate 81 is hinged to the top end of the hinge block 14. The bottom end of the hinge block 14 is hinged to the hydraulic cylinder 13. A second pressure head 82 is provided at the other end of the second pressure plate 81. A proximity switch 12 is provided on one side of the second pressure plate 81. The proximity switch 12 is used to sense the second pressure plate 81.

[0028] like Figure 4As shown, a window pressing unit 9 is provided on one side of the base plate 1. The window pressing unit 9 includes a hydraulic cylinder 13, a hinge block 14, and a third pressure plate 91. The hydraulic cylinder 13 is fixed to the oil circuit plate 2 and is connected to the oil supply channel. The top end of the piston rod of the hydraulic cylinder 13 is hinged to one end of the third pressure plate 91. The middle part of the third pressure plate 91 is hinged to the top end of the hinge block 14. The bottom end of the hinge block 14 is hinged to the hydraulic cylinder 13. A third pressure head 92 is provided at the other end of the third pressure plate 91. A proximity switch 12 is provided on one side of the third pressure plate 91. The proximity switch 12 is used to sense the third pressure plate 91.

[0029] Guide pins 10 are provided around the pad 4, and the guide pins 10 are fixed to the oil circuit plate 2; the guide pins 10 can limit the positioning block.

[0030] The base plate 1 has several lifting lugs 11 on both sides.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A hydraulic fixture for friction stir welding, characterized in that, The device includes a base plate, a pad in the center of the base plate, support blocks around the top of the pad, a support plate in the center of the pad, support blocks for supporting the product edges, and the pad for supporting the product center. The base plate is provided with several product pressing units and several weld pressing units. The product pressing units are used to press the product edges onto the support blocks, and the weld pressing units are used to press the product center onto the pad.

2. The hydraulic fixture for friction stir welding according to claim 1, characterized in that, The base plate is provided with an oil passage plate, which has several oil delivery channels. The oil passage plate is located below the pad plate, the product pressing unit, the weld pressing unit, and the window pressing unit.

3. A hydraulic fixture for friction stir welding according to claim 2, characterized in that, The base plate is provided with an oil collecting block, which is located on one side of the oil circuit plate. The oil collecting block is provided with several control channels, which are connected to the oil delivery channels.

4. A hydraulic fixture for friction stir welding according to claim 2, characterized in that, The product pressing unit includes a hydraulic cylinder, a hinge block, and a first pressure plate. The hydraulic cylinder is fixed to the oil circuit plate and is connected to the oil supply channel. The top of the piston rod of the hydraulic cylinder is hinged to one end of the first pressure plate. The middle part of the first pressure plate is hinged to the top of the hinge block. The bottom end of the hinge block is hinged to the hydraulic cylinder. The other end of the first pressure plate is provided with a first pressure head.

5. A hydraulic fixture for friction stir welding according to claim 4, characterized in that, The weld bead clamping unit includes a hydraulic cylinder, a hinge block, and a second pressure plate. The hydraulic cylinder is fixed to the hydraulic circuit board and is connected to the oil supply channel. The top of the piston rod of the hydraulic cylinder is hinged to one end of the second pressure plate. The middle part of the second pressure plate is hinged to the top of the hinge block. The bottom end of the hinge block is hinged to the hydraulic cylinder. A second pressure head is provided at the other end of the second pressure plate. A proximity switch is provided on one side of the second pressure plate. The proximity switch is used to sense the second pressure plate.

6. A hydraulic fixture for friction stir welding according to claim 5, characterized in that, A window clamping unit is provided on one side of the base plate. The window clamping unit includes a hydraulic cylinder, a hinge block, and a third pressure plate. The hydraulic cylinder is fixed to the oil circuit plate and is connected to the oil delivery channel. The top of the piston rod of the hydraulic cylinder is hinged to one end of the third pressure plate. The middle part of the third pressure plate is hinged to the top of the hinge block. The bottom end of the hinge block is hinged to the hydraulic cylinder. A third pressure head is provided at the other end of the third pressure plate. A proximity switch is provided on one side of the third pressure plate. The proximity switch is used to sense the third pressure plate.

7. A hydraulic fixture for friction stir welding according to claim 2, characterized in that, Guide pins are provided around the pad, and the guide pins are fixed to the oil circuit plate.

8. A hydraulic fixture for friction stir welding according to claim 1, characterized in that, Several lifting lugs are provided on both sides of the base plate.

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