A new type of friction stir welding clamping device

Abstract

The present invention discloses a novel friction stir welding clamping device, which relates to the technical field of welding auxiliary equipment, including: a cylinder, a cylinder bracket, a pressure plate, a pressure wheel, a scraper and a transmission assembly, the pressure plate is slidably connected to the cylinder bracket, the cylinder is fixed on the cylinder bracket and drives the pressure plate to slide vertically, the pressure wheel is rotatably installed on the pressure plate and drives the connected transmission assembly, the transmission assembly includes: a transmission shaft, a first transmission gear, a second transmission gear and a cam, the transmission shaft is horizontally rotatably installed on the pressure plate, the first transmission gear and the cam are respectively arranged at both ends of the transmission shaft, the second transmission gear and the pressure wheel are coaxially arranged and mesh with the first transmission gear, a shaft rod for installing a scraper is provided on the pressure plate, the shaft rod is slidably connected to the pressure plate and the end of the shaft rod is on one side of the cam, the present invention can form compression on the workpiece when the friction welding equipment is operating, reduce the risk of welding through, and can simultaneously clean up aluminum chips on the weld, eliminating the trouble of manual cleaning, thereby improving efficiency and practicality.

Description

Technical Field

[0001] The invention relates to the technical field of welding auxiliary equipment, and in particular to a novel friction stir welding clamping device. Background Art

[0002] Friction stir welding refers to the use of heat generated by the friction between the high-speed rotating welding tool and the workpiece to soften the material to be welded and cause plastic deformation. When the welding tool moves forward along the welding interface, the plasticized material is transferred from the front to the back of the welding tool under the action of the rotating friction force of the welding tool, and a dense solid phase weld is formed under the extrusion of the welding tool.

[0003] Thermal deformation during friction stir welding can cause partial warping of aluminum profiles during welding. Aluminum profiles have a hollow structure, and warping of the profiles can increase the risk of wear through during friction stir welding. Previously, a pressure plate was generally used for clamping, which can be divided into two situations: one is manual clamping with a pressure plate, which has low production efficiency and high labor costs; the other is clamping with automated tooling, which is very expensive. In addition, after welding, manual handheld tools are required to scrape off aluminum chips on the weld, which greatly affects efficiency. Summary of the Invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes a novel friction stir welding clamping device.

[0005] A new type of stir friction welding clamping device includes: a cylinder, a cylinder bracket, a pressure plate, a pressure wheel, a scraper and a transmission assembly. The pressure plate is slidably connected to the cylinder bracket. The cylinder is fixed on the cylinder bracket and drives the pressure plate to slide vertically. The pressure wheel is rotatably installed on the pressure plate and drives the connected transmission assembly. The transmission assembly includes a transmission shaft, on which a first transmission gear and a cam are provided. The pressure wheel is coaxially connected to a second transmission gear that can mesh with the first transmission gear. A shaft rod for installing a scraper is slidably provided on the pressure plate on one side of the cam.

[0006] As a further optimization of the above scheme, a through-hole is reserved on the pressing plate for the stirring head of the friction welding equipment to pass through. The pressing plate is also provided with a first slot for adapting the installation of the pressure wheel, a second slot for installing the transmission assembly and a third slot for installing the scraper. The first slot and the third slot are symmetrically arranged on the front and rear sides of the pressing plate relative to the through-hole, and the second slot is located on one side of the through-hole and is perpendicular to the first slot and the third slot.

[0007] As a further optimization of the above solution, the axial direction of the shaft is parallel to the rotational axis of the pressure wheel, and the axial direction of the transmission shaft is perpendicular to the axial direction of the shaft.

[0008] As a further optimization of the above solution, the shaft rod slides through the inner wall of the third slot and a spring is sleeved on one end of the shaft rod. The shaft rod has an annular limit block plate, one end of the spring abuts the inner wall of the third slot, and the other end abuts the limit block plate.

[0009] As a further optimization of the above solution, the first transmission gear and the second transmission gear are both bevel gears, and the diameter of the second transmission gear is larger than that of the first transmission gear.

[0010] As a further optimization of the above solution, a guide block is slidably installed on the cylinder bracket, the cylinder output shaft is connected to the guide block, and the bottom end of the guide block is fixedly connected to the pressure plate.

[0011] As a further optimization of the above solution, the cylinder is fixed to the front of the cylinder bracket, and the rear of the cylinder bracket is provided with an arc-shaped clamping plate that can be adapted to the main shaft of the friction welding equipment.

[0012] As a further optimization of the above solution, the arc-shaped clamping plate has a guide bar extending downward, and a guide column that can slide with the guide bar is fixed on the pressure plate.

[0013] 1. The present invention proposes a new type of friction stir welding clamping device. The pressure wheel and the pressure plate can press the workpiece to prevent the workpiece from tilting and causing welding through. The rolling of the pressure wheel can move the scraper back and forth under the transmission of the transmission assembly, thereby completing the cleaning of aluminum chips on the weld, which is extremely convenient.

[0014] 2. In the novel friction stir welding clamping device proposed in the present invention, the sliding cooperation between the guide bar and the guide column makes the lifting and lowering of the pressure plate more stable, avoiding the pressure plate from tilting due to the pressure of the cylinder on one end of the pressure plate, which ultimately affects the clamping effect.

[0015] 3. The novel friction stir welding clamping device proposed in the present invention has a through hole that can block the flying chips generated by friction welding to a certain extent, preventing them from flying around. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a novel friction stir welding clamping device proposed by the present invention;

[0017] Figure 2 A top view of a novel friction stir welding clamping device proposed by the present invention;

[0018] Figure 3 This is a schematic diagram of the usage status of a new type of stir friction welding clamping device proposed by the present invention. DETAILED DESCRIPTION

[0019] A novel friction stir welding clamping device proposed in this embodiment is referred to as Figures 1 to 3 , including: a cylinder 1, a cylinder bracket 2, a pressure plate 3, a pressure wheel 4, a scraper 5 and a transmission component.

[0020] A through opening 301 is reserved on the pressing plate 3 for the stirring head of the friction welding equipment to pass through. The pressing plate 3 is also provided with a first slot 302 for adapting the installation of the pressure wheel 4, a second slot 303 for installing the transmission assembly and a third slot 304 for installing the scraper 5. The first slot 302 and the third slot 304 are symmetrically arranged on the front and rear sides of the pressing plate 3 relative to the through opening 301, and the second slot 303 is located on one side of the through opening 301 and is perpendicular to the first slot 302 and the third slot 304.

[0021] The presence of the through-port 301 can block the flying chips generated by friction welding to a certain extent, so as to prevent them from flying around.

[0022] The pressure plate 3 is slidably connected to the cylinder bracket 2, and the cylinder 1 is fixed on the cylinder bracket 2 and drives the pressure plate 3 to slide vertically. More specifically, the cylinder 1 is fixed to the front of the cylinder bracket 2, and the rear of the cylinder bracket 2 is provided with an arc-shaped clamping plate that can be adapted to the main shaft of the friction welding equipment. A guide block 13 is slidably installed on the cylinder bracket 2, and the output shaft of the cylinder 1 is connected to the guide block 13. The bottom end of the guide block 13 is fixedly connected to the pressure plate 3. The guide block 13 is pushed by the cylinder to make the pressure plate 3 rise and fall, and then the pressure wheel 4 installed on the pressure plate 3 can press the workpiece.

[0023] In order to further stabilize the lifting process of the pressing plate 3 , a guide bar 14 extending downward is provided on the arc-shaped clamping plate, and a guide column 15 that can slide with the guide bar 14 is fixed on the pressing plate 3 .

[0024] The pressure wheel 4 is rotatably installed in the first slot 302 and drives the connected transmission assembly, which includes: a transmission shaft 6, a first transmission gear 7, a second transmission gear 8 and a cam 9. The transmission shaft 6 is horizontally rotatably installed on the pressure plate 3. The first transmission gear 7 and the cam 9 are respectively arranged at both ends of the transmission shaft 6. The second transmission gear 8 is coaxially arranged with the pressure wheel 4 and meshes with the first transmission gear 7.

[0025] Specifically, the first transmission gear 7 and the second transmission gear 8 are both bevel gears, and the diameter of the second transmission gear 8 is much larger than that of the first transmission gear 7. In this way, when the pressure wheel 4 rolls, the second transmission gear 8 engages and transmits the first transmission gear 7, and the transmission shaft 6 has a faster rotation speed.

[0026] A shaft 10 for mounting the scraper 5 is provided on the pressure plate 3. The shaft 10 slides through the inner wall of the third slot 304 and the end of the shaft 10 corresponds to the cam 9. A spring 11 is sleeved on one end of the shaft 10. The shaft 10 has an annular limit block 12. One end of the spring 11 abuts against the inner wall of the third slot 304, and the other end abuts against the limit block 12.

[0027] It is worth noting that the axial direction of the shaft 10 is parallel to the rotational axis of the pressure wheel 4 , and the axial direction of the transmission shaft 6 is perpendicular to the axial direction of the shaft 10 .

[0028] When the pressure wheel 4 rolls, the cam 9 rotates under the meshing transmission of the first transmission gear 7 and the second transmission gear 8. The rotation of the cam 9 can push the shaft 10 to slide axially in the third slot 304. During this process, the spring 11 is compressed. Under the interaction between the spring 11 and the cam 9, the scraper 5 moves back and forth, thereby cleaning the aluminum chips on the weld.

[0029] When a new type of stir friction welding clamping device proposed in this embodiment is in use, the stirring head of the friction welding equipment passes through the through opening 301 and abuts the workpiece. Under the push of the cylinder 1, the pressure plate 3 drives the pressure wheel 4 to move downward to form a pressure on the workpiece. During the movement of the friction welding equipment, the pressure wheel 4 rolls accordingly, and then the cam 9 rotates through the meshing transmission of the first transmission gear 7 and the second transmission gear 8. The rotation of the cam 9 can push the shaft 10 to slide axially in the third slot 304. During this process, the spring 11 will be compressed. Under the interaction between the spring 11 and the cam 9, the scraper 5 moves back and forth, thereby cleaning the aluminum chips on the weld.

[0030] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A new friction stir welding clamping device, characterized in that: include: A cylinder (1), a cylinder bracket (2), a pressure plate (3), a pressure wheel (4), and a scraper (5), wherein the pressure plate (3) is slidably connected to the cylinder bracket (2), the cylinder (1) is fixed on the cylinder bracket (2) and drives the pressure plate (3) to slide vertically, the pressure wheel (4) is rotatably mounted on the pressure plate (3) and is driven to be connected to a transmission assembly, the transmission assembly comprising a transmission shaft (6), a first transmission gear (7) and a cam (9) being provided on the transmission shaft (6), the pressure wheel (4) being coaxially connected to a second transmission gear (8) that can mesh with the first transmission gear (7), and a shaft (10) for mounting the scraper (5) being slidably provided on the pressure plate (3) and located on one side of the cam (9); The pressure plate (3) is provided with a through-hole (301) for the stirring head of the friction welding device to pass through. The pressure plate (3) is also provided with a first notch (302) for fitting the pressure wheel (4), a second notch (303) for fitting the transmission assembly, and a third notch (304) for fitting the scraper (5). The first notch (302) and the third notch (304) are symmetrically arranged on the front and rear sides of the pressure plate (3) relative to the through-hole (301). The second notch (303) is located on one side of the through-hole (301) and is perpendicular to the first notch (302) and the third notch (304). The axial direction of the shaft (10) is parallel to the rotational axis of the pressure wheel (4), and the axial direction of the transmission shaft (6) is perpendicular to the axial direction of the shaft (10); The shaft (10) slides through the inner wall of the third slot (304) and a spring (11) is sleeved on one end of the shaft (10). The shaft (10) has an annular limit block (12). One end of the spring (11) abuts against the inner wall of the third slot (304), and the other end abuts against the limit block (12). The first transmission gear (7) and the second transmission gear (8) are both bevel gears, and the diameter of the second transmission gear (8) is larger than that of the first transmission gear (7); A guide block (13) is slidably mounted on the cylinder bracket (2), an output shaft of the cylinder (1) is connected to the guide block (13), and a bottom end of the guide block (13) is fixedly connected to the pressure plate (3); The cylinder (1) is fixed to the front of the cylinder bracket (2), and the rear of the cylinder bracket (2) is provided with an arc-shaped clamping plate that can be adapted to the main shaft of the friction welding equipment.

2. The novel friction stir welding clamping device according to claim 1 is characterized in that: The arc-shaped clamping plate has a guide bar (14) extending downward, and a guide column (15) that can slide with the guide bar (14) is fixed on the pressing plate (3).

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