Double-sided friction stir welding equipment based on variable fusion depth

Abstract

The invention relates to the technical field of friction stir welding, in particular to double-sided friction stir welding equipment based on variable fusion depth, which comprises a fixing frame and a welding assembly, the fixing frame is of a square frame structure, and two groups of adjusting assemblies are mounted in the fixing frame; the adjusting assemblies are arranged at the upper end and the lower end of the fixing frame, two sets of measuring assemblies are installed in the welding assembly, each measuring assembly comprises a side plate, a sliding shaft is slidably connected to the interior of the side plate, a rack is fixedly connected to the outer wall of the side plate, and a gear is rotatably connected to the outer wall of the sliding shaft. A second electric telescopic rod drives a connecting plate to move downwards, a sliding shaft descends along with the connecting plate and is limited in a side plate, a gear and a rack rotate in a meshed mode to assist the sliding shaft in moving downwards, meanwhile, a pointer also moves downwards along with the sliding shaft, lifting of the connecting plate and a stirring head is accurately controlled through the pointer in combination with a scale strip, and accurate control over the welding depth is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of friction stir welding, and particularly to a double-sided friction stir welding device with variable penetration depth. Background Art

[0002] The double-sided friction stir welding device is an advanced welding technology device dedicated to realizing the double-sided simultaneous friction stir welding of workpieces. Friction stir welding (FSW) is a solid-state joining technology. Through the rotation and axial pressure of the stirring head (tool head), the workpiece material undergoes plastic deformation under the action of the stirring head and realizes joining. The double-sided friction stir welding device further improves the efficiency and quality of friction stir welding, and is particularly suitable for the welding of complex structures and thick plate materials; while the double-sided friction stir welding device with variable penetration depth is a welding device that can adjust the welding depth, and a structure for adjusting the height of the stirring head is added to the double-sided friction stir welding device to achieve the effect of variable penetration depth.

[0003] However, in the prior art, although the conventional double-sided friction stir welding device can achieve the effect of double-sided simultaneous friction stir welding of workpieces during the welding process, it cannot accurately control the welding depth during the process of adjusting the welding depth. Generally, the operator observes with the naked eye to roughly adjust the height of the stirring head to achieve the effect of variable penetration depth, but the observation with the naked eye is not accurate, which easily leads to the welding depth not meeting the design requirements, and further affects the use effect of the workpiece. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a double-sided friction stir welding device with variable penetration depth.

[0005] To achieve the above object, the present invention adopts the following technical solution: A double-sided friction stir welding device based on variable penetration depth, comprising a fixed frame and a welding assembly. The welding assembly is used for friction welding of workpieces. The fixed frame is of a square frame structure. An adjustment assembly is installed inside the fixed frame. There are two sets of the adjustment assemblies, which are arranged at the upper and lower ends of the fixed frame. The adjustment assemblies installed at the upper and lower ends of the fixed frame are used to drive the welding assembly to perform position adjustment and movement, which can be adjusted horizontally or vertically. A measurement assembly is installed inside the welding assembly. There are two sets of the measurement assemblies, which are used to measure the moving distance of the welded part inside the welding assembly, so as to facilitate height adjustment according to the dimensional requirements of workpiece welding. Combining with the measurement assembly can make the moving distance more accurate. The measurement assembly includes side plates. A sliding shaft is slidably connected inside the side plates. The sliding shaft is limited to slide inside the side plates. A rack is fixedly connected to the outer wall of the side plates. A gear is rotatably connected to the outer wall of the sliding shaft. The gear meshes with the rack. A pointer is fixedly connected to the outer wall of the sliding shaft. A scale bar is fixedly connected to the outer wall of the side plates. The pointer is slidably connected to the outer wall of the scale bar. Using the pointer in combination with the scale bar, the distance that the pointer slides outside the scale bar represents the moving distance of the welding assembly.

[0006] The welding assembly includes a sliding seat, which is fixedly connected to the outer wall of the side plates. The two side plates are connected through the sliding seat. An electric telescopic rod two is fixedly connected to the lower surface of the sliding seat. There are two electric telescopic rods two, and they are synchronously telescoped and adjusted. The output end of the electric telescopic rod two is fixedly connected to a connecting plate. The electric telescopic rod two is used to drive the connecting plate to perform lifting adjustment.

[0007] The sliding shaft is fixedly connected to the outer wall of the connecting plate. There are two sliding shafts, which are respectively fixed on both sides of the outer wall of the connecting plate. When the connecting plate is lifted and lowered, it will drive the two sliding shafts to be lifted and lowered synchronously. A motor two is fixedly connected to the upper surface of the connecting plate. The output end of the motor two is fixedly connected to a stirring head. The motor two drives the stirring head to rotate. The rotation of the stirring head contacts the workpiece and generates frictional force on the workpiece. Combining with the electric telescopic rod two driving the connecting plate to lift and lower can cause the stirring head to move downward during rotation, so as to achieve the effect of friction stir welding of the workpiece.

[0008] One set of the adjustment assemblies is installed on the upper surface of the fixed frame, and the other set of the adjustment assemblies is installed on the lower surface of the fixed frame. The two sets of adjustment assemblies are respectively installed on the upper and lower surfaces of the fixed frame to facilitate simultaneous position adjustment of the two sets of welding assemblies and facilitate friction welding of different positions of the workpiece.

[0009] The adjusting assembly includes two fixed seats for supporting and fixing, two first electric telescopic rods, two sliding plates, a first motor, a lead screw, and a guide rod. The first electric telescopic rods are used to adjust the translational sliding of the two sliding plates, and the first motor drives the lead screw to rotate to facilitate the translational sliding of the welding assembly.

[0010] The two fixed seats are fixedly connected to the outer surface of the fixed frame. The two first electric telescopic rods are respectively fixedly connected to the outer walls of the two fixed seats. The two sliding plates are respectively fixed to the output ends of the two first electric telescopic rods. The two sliding plates are respectively slidably connected inside the two fixed seats. The first electric telescopic rods are used to drive the sliding plates to move, so that the sliding plates are limited to slide inside the fixed seats.

[0011] The main body end of the first motor is fixed to the outer wall of one of the sliding plates. One end of the lead screw is fixedly connected to the output end of the first motor. The lead screw is rotatably connected inside the two sliding plates. The guide rod is fixedly connected between the two sliding plates. The output end of the first motor is used to drive the lead screw to rotate, so that the lead screw is limited to rotate between the two sliding plates. Then, the guide rod is fixed between the two sliding plates to play a role in linear limiting.

[0012] The sliding seat is threadedly connected to the outer wall of the lead screw and slidably connected to the outer wall of the guide rod. When the first motor drives the lead screw to rotate, the rotation of the lead screw will drive the sliding seat to perform translational adjustment. The guide rod plays a limiting role on the sliding seat to prevent the sliding seat from rotating along with the lead screw during the translational adjustment. The translational adjustment of the sliding seat drives the second electric telescopic rod, the connecting plate, the second motor, the stirring head, and the measuring assembly to perform translational adjustment, realizing the friction welding work on different positions of the workpiece by moving the position during the friction welding process.

[0013] The present invention has the following beneficial effects:

[0014] 1. Compared with the prior art, in the structure of the present invention, the second electric telescopic rod drives the connecting plate to move downward. During the downward movement of the connecting plate, the sliding shaft moves downward and is limited to slide inside the side plate. During the downward movement of the sliding shaft, the gear meshes with the rack and causes rotation, and the gear plays an auxiliary role in downward movement. When the sliding shaft moves downward, the pointer also moves downward. Combining with the scale lines of the scale bar, the lifting distance of the connecting plate and the stirring head can be accurately controlled, so as to control the welding depth.

[0015] 2. Compared with the prior art, in the structure of the present invention, the two second electric telescopic rods drive the connecting plate to move downward. The downward movement of the connecting plate drives the second motor and the stirring head to move downward, so that the stirring head contacts the workpiece. The second motor is started to drive the stirring head to rotate. Combining the rotation of the stirring head and the downward movement of the stirring head, the workpiece material undergoes plastic deformation under the action of the stirring head and realizes connection.

[0016] 3. Compared with the prior art, in the structure of the present invention, two sets of adjustment components are used to drive the welding component to move longitudinally and horizontally, so that the stirring head can be adjusted in multiple directions. The two electric telescopic rods I inside each set of adjustment components need to be started simultaneously. The two electric telescopic rods I drive the two sliding plates to slide limitly inside the fixed seat at the same time. During the sliding process of the sliding plates, the lead screw and the guide rod are driven to move, realizing the longitudinal translation of the welding component. Start the motor I to drive the lead screw to rotate. The rotation of the lead screw combined with the guide rod enables the welding component to achieve horizontal translation, so that the stirring head can be adjusted horizontally and longitudinally during the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structure diagram of the present invention;

[0018] Figure 2 is the structure diagram of the sliding seat of the present invention;

[0019] Figure 3 is the structure diagram of the welding component of the present invention;

[0020] Figure 4 is the structure diagram of the measuring component of the present invention;

[0021] Figure 5 is the separated structure diagram of the sliding shaft and the gear of the present invention;

[0022] Figure 6 is the structure diagram of the adjustment component of the present invention.

[0023] LEGEND DESCRIPTION:

[0024] 1. Fixed frame; 2. Adjustment component; 201. Fixed seat; 202. Electric telescopic rod I; 203. Sliding plate; 204. Motor I; 205. Lead screw; 206. Guide rod; 3. Welding component; 301. Sliding seat; 302. Electric telescopic rod II; 303. Connecting plate; 304. Motor II; 305. Stirring head; 4. Measuring component; 401. Side plate; 402. Sliding shaft; 403. Rack; 404. Gear; 405. Pointer; 406. Scale bar. DETAILED DESCRIPTION OF THE INVENTION

[0025] Refer to Figures 1-6, a friction stir welding device with variable penetration depth provided by the present invention: It includes a fixed frame 1 and a welding assembly 3. The fixed frame 1 is of a square frame structure, and the inside of the fixed frame 1 is hollow. An adjusting assembly 2 is installed inside the fixed frame 1. There are two sets of adjusting assemblies 2, which are arranged at the upper and lower ends of the fixed frame 1. The two sets of adjusting assemblies 2 can drive the two sets of welding assemblies 3 to perform translational sliding adjustment. There are two sets of welding assemblies 3, which are symmetrically arranged at the upper and lower ends of the fixed frame 1 and are respectively combined and installed with the two sets of adjusting assemblies 2. A measuring assembly 4 is installed inside the welding assembly 3. There are two sets of measuring assemblies 4. The measuring assembly 4 is used to measure the lifting distance of the internal structure of the welding assembly 3, so as to adjust the lifting height of the internal structure of the welding assembly 3 according to actual needs, so as to accurately control the lifting distance and meet the requirements of friction welding. The measuring assembly 4 includes a side plate 401. A sliding shaft 402 is slidably connected inside the side plate 401. The sliding shaft 402 is limited to slide inside the side plate 401. A rack 403 is fixedly connected to the outer wall of the side plate 401. A gear 404 is rotatably connected to the outer wall of the sliding shaft 402. The gear 404 is limited to rotate on the outer wall of the sliding shaft 402. The gear 404 meshes with the rack 403. The rotation of the gear 404 can move up and down along the direction of the rack 403. A pointer 405 is fixedly connected to the outer wall of the sliding shaft 402. The pointer 405 is horizontally arranged. A scale bar 406 is fixedly connected to the outer wall of the side plate 401. The pointer 405 is slidably connected to the outer wall of the scale bar 406. The pointer 405 follows the sliding shaft 402 up and down, so that the pointer 405 can slide up and down along the scale bar 406 during the up and down sliding process, and thus it is convenient to observe the moving distance of the welding assembly 3.

[0026] The welding assembly 3 includes a sliding seat 301. The sliding seat 301 is fixedly connected to the outer wall of the side plate 401. The two sides of the sliding seat 301 are clamped on the outer wall of the side plate 401. An electric telescopic rod two 302 is fixedly connected to the lower surface of the sliding seat 301. There are two electric telescopic rods two 302. The output end of the electric telescopic rod two 302 is fixedly connected to a connecting plate 303. The electric telescopic rod two 302 drives the connecting plate 303 to perform lifting adjustment. The sliding shaft 402 is fixedly connected to the outer wall of the connecting plate 303. The lifting adjustment of the connecting plate 303 drives the sliding shaft 402 to perform lifting and sliding. A motor two 304 is fixedly connected to the upper surface of the connecting plate 303. The output end of the motor two 304 is rotatably connected inside the connecting plate 303. The output end of the motor two 304 is fixedly connected to a stirring head 305. The stirring head 305 is used for welding work. The motor two 304 drives the stirring head 305 to rotate. After the stirring head 305 rotates, welding work can be carried out.

[0027] One set of adjusting components 2 is installed on the upper surface of the fixing frame 1, and the other set of adjusting components 2 is installed on the lower surface of the fixing frame 1. The two sets of welding components 3 can be horizontally and vertically translated and adjusted through the two sets of adjusting components 2. The adjusting component 2 includes two fixing seats 201, two first electric telescopic rods 202, two sliding plates 203, one first motor 204, one lead screw 205 and one guide rod 206. The two fixing seats 201 are fixedly connected to the outer surface of the fixing frame 1. The two first electric telescopic rods 202 are respectively fixedly connected to the outer walls of the two fixing seats 201. The two sliding plates 203 are respectively fixed to the output ends of the two first electric telescopic rods 202. The two sliding plates 203 are respectively slidably connected to the inside of the two fixing seats 201. The main body end of the first motor 204 is fixed to the outer wall of one of the sliding plates 203. One end of the lead screw 205 is fixedly connected to the output end of the first motor 204. The first motor 204 is used to drive the lead screw 205 to rotate. The lead screw 205 is rotatably connected to the inside of the two sliding plates 203. The lead screw 205 is rotationally limited in the inside of the two sliding plates 203. The guide rod 206 is fixedly connected between the two sliding plates 203. The sliding seat 301 is threadedly connected to the outer wall of the lead screw 205. The rotation of the lead screw 205 is used to drive the sliding seat 301 to slide and adjust the distance. The sliding seat 301 is slidably connected to the outer wall of the guide rod 206. Synchronously start the two first electric telescopic rods 202, and use the two first electric telescopic rods 202 to drive the two sliding plates 203 to translate and slide synchronously. During the translation and sliding process of the two sliding plates 203, the welding component 3 can be vertically translated and adjusted. Start the first motor 204 to drive the lead screw 205 to rotate. During the rotation process of the lead screw 205, the welding component 3 can be horizontally translated and adjusted. The two guide rods 206 play a role of limiting and guiding during the horizontal translation adjustment process of the welding component 3, preventing the welding component 3 from rotating along with the rotation of the lead screw 205.

[0028] Working principle: When in use, first fix the fixing frame 1 at a suitable position. Connect the electric telescopic rod one 202, motor one 204, electric telescopic rod two 302 and motor two 304 installed inside the device to the remote control device. The remote control device is usually equipped with a remote controller, and the operator can control the start and stop of the electrical appliances inside the device through the remote controller. At the same time, the device of the present invention needs to be used in cooperation with the clamping and transporting device. The clamping and transporting device is used to clamp and transport the workpiece to be welded, and can achieve the effect of feeding. Use the clamping and transporting device to clamp and place the workpiece to be welded between the two stirring heads 305. After the preparation work is completed, the operator can adjust the distance between the two stirring heads 305 and the workpiece according to the actual depth required for welding. Since the two stirring heads 305 are in a state of one facing vertically downward and the other facing vertically upward, and the workpiece is clamped and placed between the two stirring heads 305 by the clamping and transporting device, therefore, the two stirring heads 305 can be used to weld both sides of the workpiece simultaneously. When welding both sides simultaneously, it is necessary to start the upper and lower sets of welding components 3, adjustment components 2 and measurement components 4 at the same time. If only one side needs to be welded, only one set of welding components 3, adjustment components 2 and measurement components 4 needs to be started;When performing welding work, first start the two electric telescopic rods II 302 to drive the connecting plate 303 to perform lifting adjustment. While the connecting plate 303 is being lifted and lowered, it drives the sliding shafts 402 on both sides to be lifted and lowered and slide within the side plates 401 while being limited. During the sliding process of the sliding shafts 402, the gears 404 are driven to be lifted and lowered. The gears 404 are meshed with the racks 403, so that the gears 404 rotate while being lifted and lowered. The gears 404 play a role in assisting the lifting adjustment. While the sliding shafts 402 are being lifted and lowered, the pointers 405 are also driven to be lifted and lowered. The pointers 405 are in contact with the outer walls of the scale bars 406. Combining with the scale lines on the outer walls of the scale bars 406 can assist the operator to observe the precise moving distance. When the distance reaches the depth required for welding, stop the electric telescopic rod II 302 in time to stop the movement of the stirring head 305. According to the actual welding depth required, the height of the stirring head 305 can be accurately adjusted by using the pointers 405 and the scale bars 406 in combination. Then start the motor II 304 to drive the stirring head 305 to rotate for welding work. During the welding process, it is necessary to continuously move the position. The adjustment of the adjustment assembly 2 can be used to drive the welding assembly 3 to be adjusted in different directions. First, start the two groups of electric telescopic rods I 202 to drive the sliding plates 203 to perform longitudinal adjustment. During the movement of the sliding plates 203, the lead screws 205 and the guide rods 206 are driven to move synchronously, thereby driving the welding assembly 3 to perform longitudinal movement. At the same time, the motor I 204 can also be started. The motor I 204 drives the lead screws 205 to rotate. During the rotation of the lead screws 205, combined with the limitation of the guide rods 206 on the sliding seats 301, the sliding seats 301 can be driven to perform horizontal translation adjustment, and thus the horizontal and longitudinal translation adjustments of the welding assembly 3 can be realized, and the position of the stirring head 305 can be flexibly adjusted according to the actual welding position.;

[0029] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-sided friction stir welding device with variable penetration depth, comprising a fixing frame (1) and a welding assembly (3), characterized in that: The fixing frame (1) is a square frame structure. An adjustment assembly (2) is installed inside the fixing frame (1). The adjustment assembly (2) is provided in two groups. The adjustment assembly (2) is arranged at the upper and lower ends of the fixing frame (1). A measuring assembly (4) is installed inside the welding assembly (3). The measuring assembly (4) is provided in two groups. The measuring assembly (4) comprises a side plate (401). A sliding shaft (402) is slidably connected inside the side plate (401). A rack (403) is fixedly connected to the outer wall of the side plate (401). A gear (404) is rotatably connected to the outer wall of the sliding shaft (402). The gear (404) meshes with the rack (403). A pointer (405) is fixedly connected to the outer wall of the sliding shaft (402). A scale bar (406) is fixedly connected to the outer wall of the side plate (401). The pointer (405) is slidably connected to the outer wall of the scale bar (406).

2. The double-sided friction stir welding equipment with variable penetration according to claim 1, characterized in that: The welding assembly (3) comprises a slide seat (301), the slide seat (301) being fixedly connected to the outer wall of the side plate (401), the lower surface of the slide seat (301) being fixedly connected to a second electric telescopic rod (302), and the output end of the second electric telescopic rod (302) being fixedly connected to a connecting plate (303).

3. The double-sided friction stir welding device with variable penetration according to claim 2, characterized in that: The sliding shaft (402) is fixedly connected to the outer wall of the connecting plate (303), the upper surface of the connecting plate (303) is fixedly connected to the second motor (304), and the output end of the second motor (304) is fixedly connected to the stirring head (305).

4. The double-sided friction stir welding equipment with variable penetration according to claim 1, characterized in that: One group of the adjustment components (2) is mounted on the upper surface of the fixing frame (1), and the other group of the adjustment components (2) is mounted on the lower surface of the fixing frame (1).

5. The double-sided friction stir welding device with variable penetration depth according to claim 4, characterized in that: The adjustment assembly (2) comprises two fixing seats (201), two electric telescopic rods (202), two slide plates (203), a motor (204), a screw rod (205) and a guide rod (206).

6. The double-sided friction stir welding device with variable penetration depth according to claim 5, characterized in that: The two fixing seats (201) are fixedly connected to the outer surface of the fixing frame (1), the two electric telescopic rods (202) are respectively fixedly connected to the outer walls of the two fixing seats (201), the two slide plates (203) are respectively fixed to the output ends of the two electric telescopic rods (202), and the two slide plates (203) are respectively slidably connected to the inside of the two fixing seats (201).

7. The double-sided friction stir welding device with variable penetration depth according to claim 6, characterized in that: The main body end of the motor one (204) is fixed to the outer wall of one of the slides (203), one end of the screw rod (205) is fixedly connected to the output end of the motor one (204), the screw rod (205) is rotatably connected to the inside of the two slides (203), and the guide rod (206) is fixedly connected between the two slides (203).

8. The double-sided friction stir welding device with variable penetration according to claim 2, characterized in that: The slide seat (301) is threadedly connected to the outer wall of the screw rod (205), and the slide seat (301) is slidably connected to the outer wall of the guide rod (206).

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