Friction stir welding static shaft shoulder device for high-speed welding of battery tray

Abstract

The utility model relates to a friction stir welding static shaft shoulder device for high-speed welding of a battery tray, which comprises a static shaft shoulder stirring main body and a roller mechanism, and the roller mechanism is rigidly connected with the static shaft shoulder stirring main body through a hoop piece. An operator rotates the screw at the bottom end of the rack, drives the screw to axially move along the threaded hole and directly changes the compression amount of the spring arranged in the lower cylindrical shell in a sleeved mode through lifting of the pressing disc, then the pre-tightening force of the spring on the guide disc is adjusted, and after welding is started, the rotating wheel advances along with the stirring head and rolls in the mode of being attached to the surface of a weld joint. At the moment, shape fluctuation or welding load change of the welding seam can be transmitted to a roller carrier and a sliding rod through a rotating wheel, the sliding rod slides in a through hole of a lower cylindrical shell and pushes a guide disc to extrude a spring, the spring absorbs dynamic pressure fluctuation through elastic deformation, and real-time stretching and retracting of the spring can adapt to micro fluctuation of the surface of the welding seam; and finally, precise control and dynamic buffering of the roller pressure are achieved.

Description

Technical Field

[0001] This utility model relates to the field of static shoulder friction stir welding technology, specifically to a static shoulder device for high-speed welding of battery trays. Background Technology

[0002] Friction stir welding (FSW), as a solid-state joining technology, offers advantages such as high weld quality and minimal deformation. Static shoulder FSW technology, by improving the shoulder structure, effectively enhances the temperature field distribution and suppresses flash formation. Low-speed processes achieve uniform microstructure along the thickness direction, while high-speed processes reduce welding load and eliminate porosity defects. For example, Chinese utility model patent CN221473852U discloses a stirring head structure with rolling function, which controls the distance between the rolling assembly and the stirring head by adjusting the connecting rod assembly, allowing the rolling assembly to flexibly roll against the weld surface. However, this patent uses a fixed-stiffness spring assembly as elastic support, and its compression cannot be adjusted in real time. This makes it difficult to adapt the rolling pressure value to different material thicknesses and welding parameters, resulting in insufficient rolling pressure control precision. This directly affects the stability of the weld surface quality and the defect suppression effect. Utility Model Content

[0003] The main purpose of this utility model is to provide a static shoulder device for high-speed welding of battery trays by friction stir welding, in order to solve the problem that the existing stirring head structure with rolling function uses a spring assembly with fixed stiffness as elastic support, and its compression cannot be adjusted in real time, resulting in the difficulty of adapting the roller pressure value to different material thicknesses and welding parameters.

[0004] To achieve the above objectives, this utility model provides a static shoulder device for high-speed welding of battery trays using friction stir welding, including a static shoulder stirring body and a roller mechanism.

[0005] The roller mechanism includes a hoop, a frame, a lower column housing, and a spring;

[0006] The hoop is detachably fixed to the static shaft shoulder mixing body and is fixedly connected to the top of the frame. The bottom of the frame has a threaded hole, and the threaded hole is screwed with a screw rod.

[0007] Both ends of the lower column housing are coaxially perforated and fixedly connected to the frame via connecting rods. The end of the screw furthest from the frame is inserted into the upper perforated mating pressing plate, and a sliding rod is slidably installed in the lower perforation. One end of the sliding rod is inserted into the perforated mating guide plate, and the other end is fixed with a roller frame, which is equipped with rotating wheels.

[0008] The spring is sleeved inside the lower column housing, with one end abutting against the pressing plate and the other end of the spring fixedly connected to the guide plate.

[0009] A preferred embodiment is that the frame includes a support plate and an upper column shell;

[0010] One end of the bearing plate is fixedly connected to the hoop, and the other end is fixedly connected to the top of the upper column shell. A threaded hole is opened on the bottom wall of the upper column shell.

[0011] The two ends of the connecting rod are fixedly connected to the outer walls of the upper and lower column shells, respectively.

[0012] A preferred embodiment is that the hoop includes a hoop ring, which is fitted onto the stationary shoulder mixing body and has multiple threaded holes around its circumference. Each threaded hole is connected to a bolt, which abuts against the stationary shoulder mixing body. The hoop ring is fixedly connected to one end of the support plate.

[0013] A preferred embodiment is to have a through hole along the radial direction of the screw, into which a pin is inserted.

[0014] A preferred embodiment is that the pin is located between the upper and lower cylindrical shells and is positioned outside both.

[0015] A preferred embodiment is that the lower column housing has strip-shaped grooves on both sides along its axial direction, and ear plates are fixed on both sides of the guide plate. The two ear plates correspond one-to-one with the two strip-shaped grooves, and one end of each ear plate extends out of the strip-shaped groove.

[0016] A preferred embodiment is that the roller frame includes a base plate and two parallel inclined plates, one end of which is fixedly connected to the base plate and the other end is rotatably mounted on a rotating shaft, with the roller fixed on the rotating shaft, and the base plate is fixedly connected to the end of the slide bar away from the guide plate.

[0017] A preferred solution is a coaxial flange at the top of the upper column housing, with a removable bearing plate for the flange.

[0018] The beneficial effects of the above scheme are:

[0019] The roller mechanism is rigidly connected to the stationary shoulder stirring body via a clamp. Before welding, based on the material thickness of the battery tray and the welding parameters, the operator drives the screw at the bottom of the rotating frame to move axially along the threaded hole. The raising and lowering of the pressing plate directly changes the compression of the spring sleeved in the lower column shell, thereby adjusting the preload of the spring on the guide plate. When welding starts, the roller moves with the stirring head and rolls against the weld surface. At this time, fluctuations in the weld morphology or changes in welding load are transmitted to the roller frame and slide rod through the roller. The slide rod slides in the perforation of the lower column shell and pushes the guide plate to compress the spring. The spring absorbs dynamic pressure fluctuations through elastic deformation. The real-time extension and contraction of the spring can adapt to the micro-undulations of the weld surface, ultimately achieving precise control and dynamic buffering of the roller pressure. By mechanically adjusting the spring compression through the screw, different material thicknesses and welding parameter requirements can be quickly matched, avoiding pressure adaptation blind spots caused by fixed stiffness springs. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a front view structural schematic diagram of the static shoulder device for high-speed welding of battery trays using friction stir welding according to this utility model.

[0022] Figure 2 This is a three-dimensional structural diagram of the static shoulder device for high-speed welding of battery trays using friction stir welding.

[0023] Figure 3 This is a cross-sectional structural diagram of the static shoulder device for high-speed welding of battery trays according to this utility model.

[0024] Figure 4 This is a front view structural diagram of the static shaft shoulder device for high-speed welding of battery trays according to this utility model.

[0025] Explanation of reference numerals in the attached figures

[0026] 1. Static shaft shoulder mixing body; 2. Roller mechanism; 21. Hoop; 22. Frame; 23. Lower column shell; 24. Spring; 20. Threaded hole; 25. Screw; 252. Pressing plate; 230. Through hole; 26. Connecting rod; 28. Slide rod; 29. ​​Guide plate; 3. Roller frame; 31. Rotary wheel; 220. Support plate; 221. Upper column shell; 210. Hoop ring; 211. Threaded hole; 250. Through hole; 251. Pin; 230. Strip groove; 291. Ear plate; 32. Base plate; 33. Inclined plate; 34. Rotating shaft; 4. Flange. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Example:

[0029] like Figures 1-4 As shown, this embodiment provides a stationary shoulder device for high-speed welding of battery trays using friction stir welding, including a stationary shoulder stirring body 1 and a roller mechanism 2. The stationary shoulder stirring body 1 uses existing technology, so it will not be described in detail. Please refer to patent numbers: CN114289853B - Chinese Invention Patent: A Combined Stationary Shoulder Friction Stir Welding Tool or CN213969485U - Chinese Utility Model Patent: Stationary Shoulder Friction Stir Welding Device. Figure 1 As shown, the roller mechanism 2 includes a hoop 21, a frame 22, a lower column housing 23, and a spring 24. The hoop 21 is detachably fixed to the stationary shoulder stirring body 1, and is fixedly connected to the top of the frame 22. The hoop 21 includes a hoop ring 210, which is fitted onto the stationary shoulder stirring body 1. Multiple screw holes 211 are formed around the circumference of the hoop ring 210, and each screw hole 211 is threaded with a bolt (not shown). The bolt abuts against the stationary shoulder stirring body 1, thus completing the fixed installation of the hoop ring. Figure 2 As shown, the bottom end of the frame 22 has a threaded hole 20, and a screw 25 is screwed into the threaded hole 20. Both ends of the lower column housing 23 have coaxial through holes 230, and the lower column housing 23 is fixedly connected to the frame 22 via a connecting rod 26. Figure 3 As shown, the end of the screw 25 furthest from the frame 22 passes through the upper perforation 230 to mate with the pressing plate 252, while the lower perforation 230 slides along the slide rod 28. One end of the slide rod 28 passes through the perforation 230 to mate with the guide plate 29, and the other end of the slide rod 28 is fixedly mounted with a roller frame 3. The roller frame 3 is rotatably mounted with a rotating wheel 31. Figure 2 As shown, the roller frame 3 includes a base plate 32 and two parallel inclined plates 33. One end of the two inclined plates 33 is fixedly connected to the base plate 32, and the other end of the two inclined plates 33 is rotatably connected to a rotating shaft 34. The roller 31 is fixedly mounted on the rotating shaft 34. The base plate 32 is fixedly connected to the end of the slide rod 28 away from the guide plate 29. The frame 22 includes a support plate 220 and an upper column shell 221. One end of the support plate 220 is fixedly connected to the hoop 21, and the other end is fixedly connected to the top of the upper column shell 221. A threaded hole 20 is opened in the bottom wall of the upper column shell 221. The two ends of the connecting rod 26 are fixedly connected to the outer walls of the upper column shell 221 and the lower column shell 23, respectively. The spring 24 is sleeved in the lower column shell 23, and one end of the spring 24 abuts against the pressing plate 252, while the other end of the spring 24 is fixedly connected to the guide plate 29.

[0030] The roller mechanism 2 is rigidly connected to the stationary shoulder stirring body 1 by the hoop 21. Before welding, according to the material thickness of the battery tray and the welding parameters, the operator drives the screw 25 at the bottom of the rotating frame 22 to move axially along the threaded hole 20. The lifting and lowering of the pressing plate 252 directly changes the compression of the spring 24 sleeved in the lower column shell 23, thereby adjusting the preload of the spring 24 on the guide plate 29. When welding starts, the rotating wheel 31 moves with the stirring head of the stationary shoulder stirring body 1 and rolls against the weld surface. At this time, the morphological fluctuation of the weld or the change of welding load will be transmitted to the roller frame 3 and the slide rod 28 through the rotating wheel 31. The slide rod 28 slides in the through hole 230 of the lower column shell 23 and pushes the guide plate 29 to squeeze the spring 24. The spring 24 absorbs the dynamic pressure fluctuation through elastic deformation. The real-time extension and contraction of the spring 24 can adapt to the micro-undulations of the weld surface, and finally achieve precise control and dynamic buffering of the roller pressure. By mechanically adjusting the compression of the spring 24 using the screw 25, it is possible to quickly match the requirements of different material thicknesses and welding parameters, avoiding pressure mismatch caused by a fixed stiffness spring 24.

[0031] A through hole 250 is formed in the radial direction of the screw 25, and a pin 251 is inserted into the through hole 250. The pin 251 is located between the upper cylindrical shell 221 and the lower cylindrical shell 23, and is positioned outside both. The pin 251 facilitates the rotation of the screw 25 by the operator. The lower cylindrical shell 23 has slots 230 formed on both sides along its axial direction. Ear plates 291 are fixed on both sides of the guide plate 29, with each ear plate 291 corresponding to one of the slots 230, and one end of each ear plate protruding from the slot. This positions the guide plate 29 and prevents it from rotating. The top of the upper cylindrical shell 221 is coaxially connected to the flange 4, which is mounted on a detachable support plate 220.

[0032] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A static shoulder device for friction stir welding of battery trays for high-speed welding, characterized in that: The main body includes a stationary shoulder stirring unit, and also includes a roller mechanism; The roller mechanism includes a hoop, a frame, a lower column housing, and a spring; The hoop is detachably fixed to the static shaft shoulder stirring body and is fixedly connected to the top of the frame. The bottom end of the frame has a threaded hole, and a screw is screwed into the threaded hole. Both ends of the lower column shell are coaxially perforated and are fixedly connected to the frame via connecting rods. The end of the screw away from the frame passes through the upper perforated mating pressing plate, and the lower perforated slide rod is slidably mounted thereon. One end of the slide rod passes through the perforated docking guide plate, and the other end is fixed with a roller frame, on which a rotating wheel is mounted; The spring is sleeved inside the lower column housing, with one end abutting against the pressing plate and the other end of the spring fixedly connected to the guide plate.

2. The friction stir welding stationary shoulder device for high-speed welding of battery trays according to claim 1, characterized in that, The frame includes a support plate and an upper column shell; One end of the bearing plate is fixedly connected to the hoop, and the other end is fixedly connected to the top of the upper column shell. The threaded hole is opened on the bottom wall of the upper column shell. The two ends of the connecting rod are fixedly connected to the outer walls of the upper and lower column shells, respectively.

3. The friction stir welding stationary shoulder device for high-speed welding of battery trays according to claim 2, characterized in that, The hoop includes a hoop ring, which is fitted onto the stationary shoulder stirring body and has multiple screw holes around its circumference. Each screw hole is connected to a bolt, which abuts against the stationary shoulder stirring body. The hoop ring is fixedly connected to one end of the support plate.

4. The friction stir welding stationary shoulder device for high-speed welding of battery trays according to claim 2, characterized in that, The screw has a through hole along its radial direction, and a pin is inserted into the through hole.

5. The friction stir welding stationary shoulder device for high-speed welding of battery trays according to claim 4, characterized in that, The pin is located between the upper cylindrical shell and the lower cylindrical shell, and is disposed outside both of them.

6. The friction stir welding stationary shoulder device for high-speed welding of battery trays according to claim 1, characterized in that, The lower column housing has strip-shaped grooves on both sides along its axial direction, and ear plates are fixed on both sides of the guide plate. The two ear plates correspond one-to-one with the two strip-shaped grooves, and one end of each ear plate extends out of the strip-shaped groove.

7. The friction stir welding stationary shoulder device for high-speed welding of battery trays according to claim 1, characterized in that, The roller frame includes a base plate and two parallel inclined plates. One end of the two inclined plates is fixedly connected to the base plate, and the other end is rotatably mounted on a rotating shaft. The roller is fixedly mounted on the rotating shaft. The base plate is fixedly connected to the end of the slide rod away from the guide plate.

8. The friction stir welding stationary shoulder device for high-speed welding of battery trays according to claim 2, characterized in that, The top of the upper column housing has a coaxial flange, and the flange is detachable from the bearing plate.

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