An all-round positioning tool for friction stir welding

Abstract

The present invention relates to an all-round positioning tooling for friction stir welding, belonging to the technical field of heat sink welding. The all-round positioning tooling for friction stir welding includes a tooling table and a clamping and fixing unit arranged on the tooling table. The clamping and fixing unit includes a horizontal fixing mechanism and a rotating pressing mechanism arranged on the tooling table. The rotating pressing mechanism includes a pressing block, a telescopic connecting rod hinged to the pressing block, a fixing component arranged on the telescopic connecting rod, and a driving source arranged on the tooling table. The hinge axis of the telescopic connecting rod is arranged in the horizontal direction. One end of the telescopic connecting rod away from the pressing block is hinged to the tooling table. The fixing component is used to restrict the telescopic movement of the telescopic connecting rod or release the restriction on the telescopic movement of the telescopic connecting rod. The driving source is used to drive one end of the pressing block away from the placement position of the heat sink component to move upward or downward. The present invention has the effect of being applicable to combined heat dissipation structures with different thicknesses and expanding the applicable range of the tooling.

Description

Technical Field

[0001] The present invention relates to the technical field of heat sink welding, and in particular to an all-round positioning tooling for friction stir welding. Background Art

[0002] Friction stir welding is a solid-state welding technology that realizes material connection through mechanical stirring and frictional heat, and is mainly applicable to the welding of materials such as aluminum alloys, magnesium alloys, and copper alloys.

[0003] In the processing of combined heat sink structures, the upper and lower heat sink components are usually welded together by friction stir welding to form a heat sink structure. Among them, a groove is provided on the upper surface of the lower heat sink component, and the upper heat sink component is used to be fixedly embedded in the groove. During operation, first, the upper heat sink component is embedded in the groove of the lower heat sink component, the combined heat sink is placed on the tooling, then the lower heat sink component is clamped and fixed by the tooling, and then the upper heat sink component is pressed against the groove of the lower heat sink component. Then, the welding head of friction stir welding is used to spot weld the fitting position of the two heat sink components, and then the locking of the upper heat sink component by the tooling is released to make way for the welding head, and then the welding head is used to weld along the circumference of the fitting part of the two heat sink components.

[0004] Currently, in order to facilitate the adjustment of the tooling to lock or make way for the upper heat sink component, the tooling has adopted an electric or pneumatic fixing method, but the electric or pneumatic fixing method often can only fix combined heat sink structures of the same thickness, resulting in a small application range. Summary of the Invention

[0005] In order to be applicable to combined heat sink structures of different thicknesses and expand the application range of the tooling, the present invention provides an all-round positioning tooling for friction stir welding.

[0006] The all-round positioning tooling for friction stir welding provided by the present invention adopts the following technical solutions:

[0007] An all-round positioning tooling for friction stir welding, comprising a tooling table and a clamping and fixing unit arranged on the tooling table. The clamping and fixing unit includes a horizontal fixing mechanism and a rotating pressing mechanism arranged on the tooling table. The horizontal fixing mechanism is used for clamping and fixing a heat sink component with a groove below in the horizontal direction. The rotating pressing mechanism includes a pressing block, a telescopic connecting rod hinged on the pressing block, a fixing component arranged on the telescopic connecting rod, and a driving source arranged on the tooling table. The pressing block is used for pressing the heat sink component above into the groove of the heat sink component below. The hinge axis of the telescopic connecting rod is arranged in the horizontal direction. One end of the telescopic connecting rod away from the pressing block is hinged to the tooling table. The telescopic direction of the telescopic connecting rod is perpendicular to the hinge axis of the telescopic connecting rod. The fixing component is used for restricting or releasing the telescopic movement of the telescopic connecting rod. The driving source is used for driving one end of the pressing block away from the placement position of the heat sink component to move up or down.

[0008] Preferably, the telescopic connecting rod includes a first connecting rod hinged on the tooling table and a second connecting rod slidably inserted into the first connecting rod. The sliding direction of the second connecting rod is perpendicular to the hinge axis of the first connecting rod. One end of the second connecting rod away from the first connecting rod is hinged to the pressing block. An elastic member for supporting the second connecting rod is arranged between the first connecting rod and the second connecting rod. The elastic force of the elastic member is greater than the sum of the gravity of the pressing block and the second connecting rod. The fixing component is arranged on the first connecting rod and is used for relatively fixing the second connecting rod and the first connecting rod or releasing the relative fixation between the second connecting rod and the first connecting rod.

[0009] Preferably, the fixing component includes a first rack slidably arranged on the first connecting rod, a second rack arranged on the second connecting rod, an adjusting block slidably arranged on the tooling table, an adsorbing member arranged on the pressing block, and a transmission member arranged on the first rack. The sliding direction of the first rack is perpendicular to the sliding direction of the first connecting rod. The length directions of the first rack and the second rack are both parallel to the sliding direction of the second connecting rod. The first rack is used for meshing with the second rack. The adjusting block is located below the pressing block. The sliding direction of the adjusting block is arranged in the vertical direction. The adsorbing member is used for adsorbing the adjusting block to move up after the pressing block rotates to the horizontal state. The transmission member is used for pushing the first rack to slide towards the direction close to the second rack when the adjusting block moves up.

[0010] Preferably, the adsorbing member includes a first magnet arranged on the pressing block and a second magnet arranged on the adjusting block. The first magnet is used for adsorbing the second magnet to drive the adjusting block to move up. The adsorption force between the first magnet and the second magnet is greater than the gravity of the adjusting block.

[0011] Preferably, the transmission member includes a transmission rod disposed on the first rack. An inclined surface is provided on the adjusting block, and the distance from the inclined surface to the first link decreases from top to bottom. The transmission rod is used for relatively slidingly abutting against the inclined surface on the adjusting block. A return spring is provided on the first rack, and one end of the return spring away from the first rack is disposed on the first link. When the return spring is in a natural state, the first rack and the second rack are in a disengaged state. When the second magnet on the adjusting block is adsorbed and cooperated with the first magnet, the adjusting block abuts against the transmission rod, and the first rack and the second rack are engaged with each other.

[0012] Preferably, the driving source includes a first air cylinder installed on the tooling table. One end of the pressing block away from the placement position of the heat sink component is hinged to the end of the piston rod of the first air cylinder. The clamping and fixing unit further includes a first control valve rod disposed on the tooling table, and the first air cylinder is wirelessly connected to the first control valve rod.

[0013] Preferably, a plurality of rotating pressing mechanisms are provided in the clamping and fixing unit, and the rotating pressing mechanisms are used to correspond to the heat sink components located above.

[0014] Preferably, a plurality of clamping and fixing units are provided, and the plurality of clamping and fixing units are arranged at intervals along the length direction of the tooling table.

[0015] Preferably, the horizontal fixing mechanism includes a fixed seat disposed on the tooling table, a sliding seat slidably disposed on the tooling table, and a sliding member disposed on the tooling table. The fixed seat and the sliding seat are oppositely arranged, the sliding direction of the sliding seat is arranged in the horizontal direction, and the sliding member is used to adjust the sliding of the sliding seat in a direction close to or away from the fixed seat.

[0016] Preferably, the sliding member includes a second air cylinder disposed on the tooling table and a single-sided inclined block disposed on the moving end of the second air cylinder. The extending direction of the second air cylinder is arranged in the vertical direction. The single-sided inclined block is located on the side of the sliding seat away from the fixed seat. The surface of the single-sided inclined block close to the sliding seat is an inclined surface, and the inclined surface slopes upward toward the side close to the sliding seat. The sliding seat is slidably engaged with the inclined surface of the single-sided inclined block. The clamping and fixing unit further includes a second control valve rod disposed on the tooling table, and the second air cylinder is wirelessly connected to the second control valve rod.

[0017] In summary, the present invention includes the following beneficial technical effects:

[0018] During the welding operation, place the assembled heat dissipation structure that has been fitted up and down at the clamping and fixing unit of the tooling table. Then, use the horizontal fixing mechanism to clamp and fix the heat sink component with a groove at the bottom from the horizontal direction. Next, drive the pressing block to move upward at one end away from the placement position of the heat sink component through the driving source. During the movement of the pressing block, the telescopic connecting rod will be driven to rotate towards the direction close to the assembled heat dissipation structure. After the pressing block abuts against the heat sink component, as the driving source drives the end of the pressing block away from the heat sink component to continue moving upward, the telescopic connecting rod cooperates with the rotation of the pressing block and extends until the pressing block rotates to a horizontal state and presses the heat sink component above during welding into the groove of the heat sink component below during welding. Then, use the fixing component to restrict the telescopic movement of the telescopic connecting rod, thereby maintaining the pressing effect of the pressing block on the heat sink component. Since the telescopic connecting rod can elongate with the continuous upward movement of the driving source and the rotation of the pressing block after the end of the pressing block abuts against the heat sink component, it can not only save operation time and ensure the welding efficiency of the heat sink component, but also adapt to assembled heat dissipation structures of different thicknesses, expanding the applicable range of the tooling to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic horizontal view of the overall structure of an embodiment of the present invention.

[0020] Figure 2 is a schematic cross-sectional view of the horizontal structure of a single set of clamping and fixing units in an embodiment of the present invention.

[0021] Figure 3 is a schematic view of the structure of the rotating pressing mechanism in an embodiment of the present invention.

[0022] Figure 4 is a schematic view of the structure of the rotating pressing mechanism from another angle in an embodiment of the present invention.

[0023] Figure 5 is a partial cross-sectional view of another state of the rotating pressing mechanism in an embodiment of the present invention.

[0024] Figure 6 is Figure 5 an enlarged view of part A in

[0025] Figure 7 is a schematic view of the structure of the horizontal fixing mechanism in an embodiment of the present invention.

[0026] Explanation of the accompanying drawings: 1. workbench; 2. horizontal fixing mechanism; 21. fixed seat; 22. sliding seat; 23. sliding member; 231. second cylinder; 232. single-sided inclined block; 3. rotating clamping mechanism; 31. clamping block; 32. telescopic connecting rod; 321. first connecting rod; 322. second connecting rod; 33. fixing assembly; 331. first rack; 332. second rack; 333. adjusting block; 334. adsorption member; 3341. first magnet; 3342. second magnet; 335. transmission member; 3351. transmission rod; 34. driving source; 341. first cylinder; 4. reset spring; 5. mounting groove; 6. mounting plate; 7. pulling spring; 8. support plate; 9. sliding groove; 10. guide block; 11. limit frame; 12. first control valve stem; 13. second control valve stem; 14. vertical plate. DETAILED DESCRIPTION

[0027] The following combination Figures 1 - 7 The present invention is described in further detail.

[0028] The embodiment of the present invention discloses an all-round positioning tool for stir friction welding. Figure 1 The all-round positioning tool for friction stir welding includes a tooling table 1 and a clamping and fixing unit. The tooling table 1 is rectangular and is used to be installed at a desired position of the welding machine. The clamping and fixing unit is arranged on the tooling table 1, and the clamping and fixing unit corresponds to the combined heat dissipation structure one by one. In order to improve the processing efficiency, multiple groups of clamping and fixing units are arranged at intervals along the length direction of the tooling table 1. In the embodiment of the present invention, two groups of clamping and fixing units are arranged. In other embodiments, the number of clamping and fixing units can be set as needed.

[0029] Reference Figure 2 and Figure 3 Each group of clamping and fixing units includes a horizontal fixing mechanism 2 and a rotating clamping mechanism 3. The horizontal fixing mechanism 2 is arranged on the workbench 1. The horizontal fixing mechanism 2 is used to clamp and fix the heat sink component with a groove located below in the horizontal direction. The rotating clamping mechanism 3 includes a clamping block 31, a telescopic connecting rod 32, a fixing assembly 33 and a driving source 34. The clamping block 31 is movably arranged on the workbench 1. The cross section of the clamping block 31 is rectangular and the longitudinal section is a right-angled trapezoid. The lower surface of the clamping block 31 is a plane to facilitate pressing the heat sink component; the clamping block 31 is used to press the heat sink component located above onto the groove of the heat sink component located below.

[0030] Reference Figure 2 and Figure 3, One end of the telescopic connecting rod 32 is hinged to the pressing block 31, and the other end is hinged to the tooling table 1. The hinge axis of the telescopic connecting rod 32 is arranged in the horizontal direction, and the hinge axis of the telescopic connecting rod 32 is perpendicular to the length direction of the pressing block 31. The telescopic direction of the telescopic connecting rod 32 is perpendicular to the hinge axis of the telescopic connecting rod 32. The pressing block 31 is movably connected to the tooling table 1 through the telescopic connecting rod 32; the driving source 34 is fixedly installed on the tooling table 1. The driving source 34 is located on one side of the telescopic connecting rod 32 away from the placement position of the heat sink component. The driving source 34 is used to drive one end of the pressing block 31 away from the placement position of the heat sink component to move up or down. The fixing component 33 is arranged on the telescopic connecting rod 32. The fixing component 33 is used to limit the telescopic movement of the telescopic connecting rod 32 or release the restriction on the telescopic movement of the telescopic connecting rod 32.

[0031] When the pressing mechanism 3 rotates to the initial state, one end of the pressing block 31 away from the placement position of the heat sink component approaches the surface of the tooling table 1, while one end of the pressing block 31 close to the placement position of the heat sink component tilts upward. The upper end of the telescopic connecting rod 32 tilts toward the side away from the placement position of the heat sink component, thereby providing sufficient space for the placement of the combined heat dissipation structure.

[0032] During the welding operation, first place the combined heat dissipation structure that has been fitted up and down at the clamping and fixing unit of the tooling table 1. Then, clamp and fix the heat sink component with a groove at the bottom in the horizontal direction through the horizontal fixing mechanism 2. Next, drive the driving source 34 to drive one end of the pressing block 31 away from the placement position of the heat sink component to move upward. At this time, the pressing block 31 will drive the telescopic connecting rod 32 to rotate toward the direction close to the heat sink component. After the pressing block 31 abuts against the heat sink component, as the driving source 34 continues to drive one end of the pressing block 31 away from the heat sink component to move upward, the telescopic connecting rod 32 will cooperate with the rotation of the pressing block 31 until the pressing block 31 rotates to the horizontal state and presses the heat sink component at the upper part into the groove of the heat sink component at the lower part. At this time, the telescopic movement of the telescopic connecting rod 32 is restricted by the fixing component 33. Thus, under the condition that the driving source 34 is fixed and the telescopic movement of the telescopic connecting rod 32 is restricted, the pressing effect of the pressing block 31 is ensured; since the telescopic connecting rod 32 can elongate with the continuous upward movement of the driving source 34 and cooperate with the rotation of the pressing block 31 after the end of the pressing block 31 abuts against the heat sink component, it can adapt to combined heat dissipation structures of different thicknesses, and to a certain extent, expands the applicable range of the tooling.

[0033] Next, spot welding is performed on the joint of the two heat sink components that are fitted up and down through the welding head of friction stir welding. Then, the driving source 34 drives the pressing block 31 to move downward at one end away from the placement position of the heat sink component. At this time, the pressing block 31 drives the telescopic connecting rod 32 to rotate in a direction away from the heat sink component. Then, the telescopic restriction on the telescopic connecting rod 32 is released through the fixing component 33. As the driving source 34 continues to drive the end of the pressing block 31 to move downward, the end of the pressing block 31 that abuts against the heat sink component tilts upward until it returns to the initial state, so that the pressing block 31 is separated from the upper heat sink component, facilitating the welding head of friction stir welding to make way, realizing the quick locking or loosening of the heat sink component, ensuring the welding efficiency. After that, the welding head of friction stir welding can weld the joint of the two heat sink components that are fitted up and down along the circumference. The fixing method of the present invention can not only save operation time and ensure the welding efficiency of the heat sink component, but also be applicable to the welding process of heat sink components with different thicknesses.

[0034] Refer to Figure 2 , a plurality of rotating pressing mechanisms 3 are provided in each clamping and fixing unit. The rotating pressing mechanism 3 is used to correspond to the upper heat sink component. Specifically, when the cross-sectional area of the upper heat sink component embedded in the groove is greater than a preset value, four rotating pressing mechanisms 3 correspond to it, and the four rotating pressing mechanisms 3 are located at the four corners of the heat sink component to achieve all-round clamping and positioning of the workpiece. When the cross-sectional area of the upper heat sink component is less than the preset value, only one rotating pressing mechanism 3 may correspond to it. Among them, the preset value can be set as required. In the embodiment of the present invention, two grooves are provided on the lower heat sink component, and heat sink components are respectively embedded in the grooves. The cross-sectional area of one heat sink component is greater than the preset value, and it is pressed and fixed by the four rotating pressing mechanisms 3 at the four corners. The cross-sectional area of the other heat sink component is less than the preset value, and it is pressed and fixed by one rotating pressing mechanism 3. In other embodiments, the number of the rotating pressing mechanisms 3 can be set as required.

[0035] Refer to Figure 2 , Figure 3 and Figure 4, for facilitating the driving of one end of the pressing block 31 away from the heat sink component to move upward or downward, an installation groove 5 is formed on the tooling table 1. The installation grooves 5 correspond to the pressing blocks 31 one by one, and the installation groove 5 is located below the corresponding pressing block 31. The driving source 34 includes a first cylinder 341, and the first cylinder 341 is embedded in the installation groove 5 below the corresponding pressing block 31. The extending direction of the first cylinder 341 is arranged along the vertical direction. One end of the pressing block 31 away from the heat sink component is hinged to the end of the piston rod of the corresponding first cylinder 341. The hinge axis between the pressing block 31 and the piston rod of the first cylinder 341 is parallel to the hinge axis between the pressing block 31 and the telescopic connecting rod 32. Each set of clamping and fixing units further includes a first control valve rod 12 installed on the tooling table 1. The first cylinders 341 in each set of clamping and fixing units are wirelessly connected to the corresponding first control valve rods 12. In other embodiments, the first cylinder 341 can be replaced by an electric cylinder, an electric push rod, or the like.

[0036] During use, by operating the first control valve rod 12 to drive the first cylinder 341 to work, the first cylinder 341 drives one end of the corresponding pressing block 31 away from the heat sink component to move upward or downward, so as to realize the pressing or yielding of the pressing block 31. The pneumatic fixing method can greatly save the switching time between the pressing and yielding of the pressing block 31 and ensure the welding efficiency.

[0037] Refer to Figure 3 , two telescopic connecting rods 32 are hinged to each pressing block 31, and the two telescopic connecting rods 32 are located on the opposite sides of the corresponding pressing block 31, which helps to strengthen the rotational stability of the pressing block 31.

[0038] Refer to Figure 2 and Figure 3 , an installation plate 6 is fixed on the cylinder block of each first cylinder 341. The installation plate 6 is located on the side of the piston rod of the corresponding first cylinder 341 close to the heat sink component. The telescopic connecting rod 32 includes a first connecting rod 321 and a second connecting rod 322. The first connecting rod 321 is hinged to the installation plate 6 below the corresponding pressing block 31. The hinge axis of the first connecting rod 321 is perpendicular to the length direction of the corresponding pressing block 31, so that the two first connecting rods 321 corresponding to the pressing block 31 are hinged on both sides of the corresponding installation plate 6; the second connecting rod 322 is slidably inserted into the corresponding first connecting rod 321, and the sliding direction of the second connecting rod 322 is perpendicular to the hinge axis of the first connecting rod 321. One end of the second connecting rod 322 away from the first connecting rod 321 is hinged to the side of the corresponding pressing block 31. The distance from the hinge point of the second connecting rod 322 and the corresponding pressing block 31 to the side of the pressing block 31 close to the heat sink component is greater than the distance from the hinge point of the second connecting rod 322 and the corresponding pressing block 31 to the side of the pressing block 31 away from the heat sink component, so as to facilitate the end of the pressing block 31 close to the heat sink component to rotate within a larger range.

[0039] Refer toFigure 3 and Figure 5 , the cross-sections of the first connecting rod 321 and the second connecting rod 322 are both circular. In other embodiments, the cross-sections of the first connecting rod 321 and the second connecting rod 322 can both be rectangular. An elastic member for supporting the corresponding second connecting rod 322 is provided between the first connecting rod 321 and the second connecting rod 322. The elastic force of the elastic member is greater than the sum of the gravity of the pressing block 31 and the second connecting rod 322. The fixing assembly 33 is arranged on the first connecting rod 321. Specifically, the elastic member includes a pulling spring 7. The pulling spring 7 is located inside the first connecting rod 321. The extending direction of the pulling spring 7 is parallel to the sliding direction of the second connecting rod 322. One end of the pulling spring 7 is fixed on the surface of the corresponding second connecting rod 322 close to the first connecting rod 321, and the other end is fixed on the inner wall of the first connecting rod 321 on the side away from the corresponding pressing block 31. The elastic force of the pulling spring 7 is greater than the sum of the gravity of the pressing block 31 and the two second connecting rods 322 on both sides, so that the second connecting rod 322 will not move relative to the first connecting rod 321 only under the action of the gravity of the pressing block 31.

[0040] When the pressing block 31 rotates to the horizontal state and the pulling spring 7 is in the natural state, the distance from the lower surface of the pressing block 31 to the upper surface of the tooling table 1 is the standard thickness of the combined heat dissipation structure. During the processing of the combined heat dissipation structure with the standard thickness, when the pressing block 31 rotates to drive the telescopic connecting rod 32 to rotate, there will be no relative sliding between the second connecting rod 322 and the first connecting rod 321 of the telescopic connecting rod 32 under the elastic force of the pulling spring 7. When the thickness of the combined heat dissipation structure is greater than the standard thickness, before the pressing block 31 rotates to the horizontal state, its end abuts against the edge of the heat sink component. At this time, as the first cylinder 341 continues to drive the end of the pressing block 31 away from the heat sink component to move upward, the pressing block 31 will pull the corresponding two second connecting rods 322 to move away from the tooling table 1, realizing the elongation of the telescopic connecting rod 32. And under the pulling force of the pulling spring 7, the end of the pressing block 31 close to the heat sink component always abuts against the heat sink component until the first cylinder 341 drives the pressing block 31 to the horizontal state. At this time, the pulling spring 7 is in the stretched state. The second connecting rod 322 and the first connecting rod 321 are relatively fixed through the fixing assembly 33, so that the heat sink component located above can be pressed into the groove of the heat sink component located below. Since the second connecting rod 322 can slide and adjust according to different combined heat dissipation structure components with a thickness greater than the standard thickness, it can be applied to combined heat dissipation structures with different thicknesses, expanding the scope of application.

[0041] Refer to Figure 5 and Figure 6, for facilitating the relative fixation of the second link 322 and the first link 321 to restrict the telescoping of the telescopic link 32 or releasing the fixation between the second link 322 and the first link 321 to release the restriction on the telescoping of the telescopic link 32, the fixing assembly 33 includes a first rack 331, a second rack 332, an adjusting block 333, an adsorbing member 334 and a transmission member 335. The first rack 331 corresponds to the first link 321 one by one. The first rack 331 is slidably disposed on the side of the corresponding first link 321 close to the pressing block 31. The sliding direction of the first rack 331 is perpendicular to the sliding direction of the second link 322. Specifically, a support plate 8 is fixed on the side of the first link 321 close to the corresponding pressing block 31, and a guide rod (not marked in the figure) is fixed on the support plate 8. The first rack 331 is slidably sleeved on the corresponding guide rod to guide the sliding of the first rack 331.

[0042] Refer to Figure 5 and Figure 6 , the second rack 332 corresponds to the second link 322 one by one. The second rack 332 is fixed on the side of the second link 322 close to the corresponding pressing block 31. The length directions of the first rack 331 and the second rack 332 are both parallel to the sliding direction of the second link 322. A notch (not marked in the figure) for the first rack 331 to slide through is formed on the side of the first link 321 close to the corresponding pressing block 31. The first rack 331 is used to mesh with the second rack 332 through the notch.

[0043] Refer to Figure 3 and Figure 5 , the adjusting block 333 is located below the corresponding pressing block 31. The adjusting block 333 is slidably disposed on the corresponding mounting plate 6. The sliding direction of the adjusting block 333 is arranged vertically. A vertical rod (not marked in the figure) for guiding the sliding of the adjusting block 333 is fixed on the mounting plate 6. The adsorbing member 334 is disposed on the pressing block 31. The adsorbing member 334 is used to adsorb the adjusting block 333 to move upward after the pressing block 31 rotates to the horizontal state. The transmission member 335 is disposed on the first rack 331. The transmission member 335 is used to push the first rack 331 to slide toward the direction close to the second rack 332 when the adjusting block 333 moves upward.

[0044] Refer to Figure 5, to facilitate the adsorption of the adjustment block 333 to move upward after the pressing block 31 rotates to the horizontal state, the adsorbing member 334 includes a first magnet 3341 and a second magnet 3342. The first magnet 3341 is fixed on the surface of the pressing block 31 close to the mounting plate 6, and the second magnet 3342 is fixed on the upper surface of the adjustment block 333. The first magnet 3341 is used to adsorb the second magnet 3342 to drive the adjustment block 333 to move upward. The adsorption force between the first magnet 3341 and the second magnet 3342 is much greater than the gravity of the adjustment block 333. To ensure that the first magnet 3341 can only adsorb the second magnet 3342 to move after the pressing block 31 rotates to the horizontal state, a limiting frame 11 is fixed on the surface of the pressing block 31 close to the mounting plate 6. The first magnet 3341 is located within the limiting frame 11. The thickness of the limiting frame 11 is set as required so that when the pressing block 31 is not in the horizontal state, the first magnet 3341 will not adsorb the second magnet 3342.

[0045] Refer to Figure 3 and Figure 6 , to facilitate the first rack 331 to slide in the direction close to the second rack 332 during the upward movement of the adjustment block 333, the upper end of the adjustment block 333 is an isosceles trapezoid and the lower end is a rectangle; the transmission member 335 includes a transmission rod 3351. The transmission rod 3351 is fixedly passed through the first rack 331. One end of the transmission rod 3351 slides through the corresponding first connecting rod 321, and the other end extends toward the adjustment block 333. Slopes are provided on both opposite sides of the adjustment block 333, corresponding to the transmission rod 3351 one by one. The distance from the slope to the corresponding first connecting rod 321 on one side decreases from top to bottom. The transmission rod 3351 is used to relatively slide and abut against the corresponding slope on the adjustment block 333. The surface of the transmission rod 3351 close to the adjustment block 333 is a convex arc surface, which is convenient for relative sliding with the slope of the adjustment block 333; a return spring 4 is sleeved on the transmission rod 3351. One end of the return spring 4 is fixed on the first connecting rod 321, and the other end is fixed on the first rack 331. When the return spring 4 is in the natural state, the first rack 331 and the second rack 332 are in a disengaged state. When the second magnet 3342 on the adjustment block 333 is adsorbed and cooperated with the first magnet 3341, the plane connected below the slope of the adjustment block 333 abuts against the corresponding transmission rod 3351 on one side, and the first rack 331 and the second rack 332 are in a meshed state.

[0046] When one end of the pressing block 31 close to the heat sink component tilts upward to be in the initial state, the plane where the first magnet 3341 is located intersects with the plane where the second magnet 3342 is located. The first magnet 3341 and the second magnet 3342 are in a disengaged state. The transmission rod 3351 and the slope on the adjustment block 333 are in a disengaged state. The return spring 4 is in the natural state, so that the first rack 331 and the second rack 332 are in a disengaged state, thus facilitating the rotation of the pressing block 31 in the direction close to the heat sink component.

[0047] When the side of the pressing block 31 away from the heat sink component moves upward under the action of the corresponding first cylinder 341, the pressing block 31 gradually rotates to a horizontal state, making the first magnet 3341 gradually align with the corresponding second magnet 3342. When the pressing block 31 rotates to the horizontal state and presses the heat sink component located above into the groove of the heat sink component located below, the first magnet 3341 aligns with the corresponding second magnet 3342. Then, the first magnet 3341 adsorbs the second magnet 3342 and drives the adjusting block 333 to move in the direction of the pressing block 31. Then, the inclined surface of the adjusting block 333 slides relative to the corresponding transmission rod 3351 on one side. The inclined surface of the adjusting block 333 abuts against the transmission rods 3351 on both sides and drives the first rack 331 to approach the second rack 332 until the plane below the inclined surface of the adjusting block 333 abuts against the corresponding transmission rod 3351 on one side. At this time, the first rack 331 meshes with the second rack 332, realizing the relative fixation of the first connecting rod 321 and the second connecting rod 322, thereby ensuring the pressing effect of the pressing block 31 in the horizontal state.

[0048] Refer to Figure 3 and Figure 5 As shown in FIGS. and, a vertical plate 14 is fixed on the mounting plate 6. The vertical plates 14 correspond to the first connecting rods 321 one by one. The vertical plates 14 are located on the side of the corresponding first connecting rods 321 away from the piston rod of the first cylinder 341. The vertical plates 14 are arranged in the vertical direction. When the first connecting rod 321 abuts against the corresponding vertical plate 14, the first connecting rod 321 is in a vertical state; under the limitation of the vertical plate 14, the first connecting rod 321 will not tilt in the direction of approaching the heat sink component.

[0049] Refer to Figure 2 and Figure 7 As shown in FIGS. and, to facilitate clamping and fixing the heat sink component located below in the horizontal direction, the horizontal fixing mechanism 2 includes a fixed seat 21, a sliding seat 22 and a sliding member 23. The fixed seat 21 is fixedly installed on the tooling table 1 by bolts. A sliding groove 9 is formed on the tooling table 1. The sliding seat 22 is slidably arranged in the sliding groove 9. The sliding direction of the sliding seat 22 is arranged in the horizontal direction. The fixed seat 21 and the sliding seat 22 are arranged oppositely. The heat sink component is placed between the fixed seat 21 and the sliding seat 22. Specifically, the sliding direction of the sliding seat 22 is parallel to the arrangement direction of the sliding seat 22 and the fixed seat 21. The sliding member 23 is arranged in the sliding groove 9. The sliding member 23 is used to adjust the sliding seat 22 to slide in the direction of approaching or departing from the fixed seat 21.

[0050] Refer to Figure 2 and Figure 7, for facilitating the adjustment of the sliding of the sliding seat 22 in the direction of approaching or departing from the fixed seat 21, the sliding member 23 includes a second cylinder 231 and a unilateral inclined block 232. The second cylinder 231 is fixedly embedded in the sliding groove 9, the extending direction of the second cylinder 231 is arranged along the vertical direction, the unilateral inclined block 232 is fixed on the moving end of the second cylinder 231, the unilateral inclined block 232 slidably penetrates through the sliding groove 9, and the unilateral inclined block 232 is located on the side of the sliding seat 22 away from the fixed seat 21. The surface of the unilateral inclined block 232 close to the sliding seat 22 is an inclined surface, and the distance from the inclined surface to the fixed seat 21 increases from top to bottom. The sliding seat 22 is in sliding fit with the inclined surface of the unilateral inclined block 232. The clamping and fixing unit further includes a second control valve rod 13 arranged on the tooling table 1, and the second cylinder 231 is wirelessly connected to the second control valve rod 13.

[0051] When it is necessary to drive the sliding seat 22 to slide in the direction of approaching the fixed seat 21, operate the second control valve rod 13 to start the second cylinder 231 to drive the unilateral inclined block 232 to move downward. Since the inclined surface of the unilateral inclined block 232 is in sliding fit with the sliding seat 22, during the downward movement of the unilateral inclined block 232, the sliding seat 22 is abutted by the inclined surface and slides in the direction of approaching the fixed seat 21, which helps to clamp the heat sink component located below during welding; when it is necessary to drive the sliding seat 22 to slide in the direction of departing from the fixed seat 21, operate the second control valve rod 13 to start the second cylinder 231 to drive the unilateral inclined block 232 to move upward. At this time, during the upward movement of the unilateral inclined block 232, the sliding seat 22 is pulled to slide in the direction of departing from the fixed seat 21, which helps to loosen the sliding seat 22 from the heat sink component located below during welding and facilitates the removal of the heat sink component.

[0052] Refer to Figure 2 and Figure 7 , to help guide the sliding of the unilateral inclined block 232, a guide block 10 is fixedly arranged in the sliding groove 9. The guide block 10 is located on the side of the unilateral inclined block 232 away from the sliding seat 22, and the plane on the side of the unilateral inclined block 232 away from the sliding seat 22 is in sliding fit with the guide block 10.

[0053] Refer to Figure 2 and Figure 7 , there are two sets of horizontal fixing mechanisms 2 for each clamping and fixing unit. The arrangement direction of the fixed seat 21 and the sliding seat 22 in one set of the horizontal fixing mechanism 2 is perpendicular to the arrangement direction of the fixed seat 21 and the sliding seat 22 in the other set of the horizontal fixing mechanism 2. The sliding grooves 9 correspond to the sliding seats 22 one by one, so that the fixed seats 21 and the sliding seats 22 in the two clamping and fixing units are located on the four sides of the rectangular heat sink component. Designing the horizontal fixing mechanism 2 of each clamping and fixing unit into two sets helps to improve the clamping and fixing effect on the heat sink component. The second cylinders 231 in the clamping and fixing units are all wirelessly connected to the second control valve rod 13.

[0054] The implementation principle of the embodiment of the present invention is as follows: When the combined heat dissipation structure is not placed on the tooling, when the horizontal fixing mechanism 2 and the rotating pressing mechanism 3 are in the initial state, the sliding seat 22 is located at a position away from the corresponding fixed seat 21, the piston rod of the first cylinder 341 is in the retracted state, one end of the pressing block 31 away from the placement position of the heat sink component is close to the surface of the tooling table 1, and one end close to the placement position of the heat sink component is tilted upward, and the telescopic connecting rod 32 is inclined towards the piston rod of the corresponding first cylinder 341, so as to provide sufficient space for the placement of the combined heat dissipation structure.

[0055] During the welding operation, place the combined heat dissipation structure that has been vertically fitted at the clamping and fixing unit of the tooling table 1, so that the lower heat sink component in the combined heat dissipation structure is located between the sliding seat 22 and the corresponding fixed seat 21, and the two adjacent sides of the lower heat sink component are respectively in contact with the two fixed seats 21 in the clamping and fixing unit. Then operate the corresponding second control valve rod 13, and the second control valve rod 13 starts two second cylinders 231 to synchronously drive the corresponding single-sided inclined blocks 232 to move downward. During the downward movement of the single-sided inclined blocks 232, the sliding seat 22 is driven to slide towards the corresponding fixed seat 21 through the inclined surface contact, so as to clamp and fix the lower heat sink component during welding.

[0056] Then operate the first control valve rod 12 to drive a plurality of first cylinders 341 in the corresponding clamping and fixing unit to work, so that the first cylinders 341 synchronously drive the corresponding pressing blocks 31 at one end away from the heat sink component to move upward. At this time, the pressing block 31 will drive the telescopic connecting rod 32 to rotate towards the direction close to the heat sink component. After the end of the pressing block 31 abuts against the edge of the heat sink component, as the drive source 34 continues to drive the end of the pressing block 31 away from the heat sink component to move upward, the second connecting rod 322 and the first connecting rod 321 slide relative to each other, so that the telescopic connecting rod 32 extends to cooperate with the rotation of the pressing block 31 until the pressing block 31 rotates to a horizontal state and presses the heat sink component located above into the groove of the heat sink component located below. At this time, the first magnet 3341 is aligned with the corresponding second magnet 3342. Then, the first magnet 3341 adsorbs the second magnet 3342 to drive the adjusting block 333 to move towards the direction close to the pressing block 31. Then, the inclined surface of the adjusting block 333 slides relative to the transmission rod 3351 on the corresponding side, and the adjusting block 333 abuts against the transmission rods 3351 on both sides to drive the first rack 331 to approach the second rack 332 until the first magnet 3341 is adsorbed and fixed with the corresponding second magnet 3342, and the plane below the inclined surface of the adjusting block 333 abuts against the transmission rod 3351. At this time, the first rack 331 meshes with the second rack 332, realizing the relative fixation of the first connecting rod 321 and the second connecting rod 322, so that when the first cylinder 341 corresponding to the pressing block 31 in the horizontal state stops working, the pressing block 31 cannot rotate. Since the telescopic connecting rod 32 can extend with the continuous upward movement of the piston rod of the first cylinder 341 after the end of the pressing block 31 abuts against the heat sink component, and cooperate with the rotation of the pressing block 31, it can adapt to combined heat sink structures of different thicknesses, and to a certain extent, expands the applicable range of the tooling.

[0057] Then, the welding head of the friction stir welding is used to spot weld the joints of the two heat sink components that are interlocked up and down, and the two interlocked heat sink components are initially fixed. Then, the first control valve stem 12 is operated, and the first control valve stem 12 drives the multiple first cylinders 341 in the corresponding clamping and fixing units to synchronously drive the clamping block 31 to move downward at one end away from the placement position of the heat sink component. At this time, the clamping block 31 will drive the telescopic connecting rod 32 to rotate in the direction close to the telescopic rod of the first cylinder 341, and the first magnet 3341 gradually disengages from the second magnet 3342. The adjusting block 333 moves downward under the action of gravity, so that the transmission rod 3 The abutment force on 351 is reduced and it disengages from the inclined surface of the adjustment block 333, and then the return spring 4 pushes the first rack 331 away from the corresponding second rack 332, so that the first rack 331 is disengaged from the second rack 332, and as the first cylinder 341 continues to pull the clamping block 31 away from one end of the heat sink component and move downward, the end of the clamping block 31 abutting against the heat sink component is tilted upward until it returns to its initial state, thereby disengaging the clamping block 31 from the heat sink component located above during welding, making it easy to make way for the welding head of the friction welding, and realizing rapid locking or loosening of the heat sink component, thereby ensuring welding efficiency.

[0058] Afterwards, the two heat sink components that are embedded in each other up and down can be welded along the circumferential direction through the stir friction welding welding head. The fixing method of the present invention can not only save operation time and ensure the welding efficiency of the heat sink components, but also be applicable to heat sink components of different thicknesses, thereby expanding the scope of application.

[0059] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An all-round positioning tool for friction stir welding, characterized in that: The invention comprises a tooling table (1) and a clamping and fixing unit arranged on the tooling table (1), wherein the clamping and fixing unit comprises a horizontal fixing mechanism (2) and a rotating pressing mechanism (3) arranged on the tooling table (1), wherein the horizontal fixing mechanism (2) is used to clamp and fix a heat sink component with a groove located below in a horizontal direction, and the rotating pressing mechanism (3) comprises a pressing block (31), a telescopic connecting rod (32) hinged on the pressing block (31), a fixing assembly (33) arranged on the telescopic connecting rod (32), and a driving source (34) arranged on the tooling table (1), wherein the pressing block (31) is used to press the heat sink component located above into the groove of the heat sink component located below, and the hinge axis of the telescopic connecting rod (32) is The telescopic link (32) is arranged in a horizontal direction, one end of the telescopic link (32) away from the pressing block (31) is hinged to the workbench (1), the telescopic direction of the telescopic link (32) is perpendicular to the hinge axis of the telescopic link (32), the fixing assembly (33) is used to limit the telescopic movement of the telescopic link (32) or to release the restriction on the telescopic movement of the telescopic link (32), the driving source (34) is used to drive the end of the pressing block (31) away from the placement position of the heat sink component to move upward or downward, the telescopic link (32) comprises a first link (321) hinged on the workbench (1) and a second link (322) slidably inserted into the first link (321), the sliding direction of the second link (322) is perpendicular to the first link (321) ), one end of the second connecting rod (322) away from the first connecting rod (321) is hinged on the clamping block (31), an elastic member for supporting the second connecting rod (322) is arranged between the first connecting rod (321) and the second connecting rod (322), the elastic force of the elastic member is greater than the sum of the gravity of the clamping block (31) and the second connecting rod (322), the fixing component (33) is arranged on the first connecting rod (321), the fixing component (33) is used to relatively fix the second connecting rod (322) and the first connecting rod (321) or release the relative fixation between the second connecting rod (322) and the first connecting rod (321), the fixing component (33) includes a first rack ( 331), a second rack (332) arranged on the second connecting rod (322), an adjusting block (333) slidably arranged on the workbench (1), an adsorption member (334) arranged on the pressing block (31) and a transmission member (335) arranged on the first rack (331), the sliding direction of the first rack (331) is perpendicular to the sliding direction of the first connecting rod (321), the length directions of the first rack (331) and the second rack (332) are both parallel to the sliding direction of the second connecting rod (322), the first rack (331) is used to mesh with the second rack (332), the adjusting block (333) is located below the pressing block (31), and the sliding direction of the adjusting block (333) is arranged along the vertical direction,The adsorption member (334) is used to make the pressing block (31) rotate to a horizontal state and then adsorb the adjusting block (333) to move upward. The transmission member (335) is used to make the adjusting block (333) push the first rack (331) to slide in a direction close to the second rack (332) when the adjusting block (333) moves upward. The adsorption member (334) includes a first magnet (3341) arranged on the pressing block (31) and a second magnet (3342) arranged on the adjusting block (333). The first magnet (3341) is used to adsorb the second magnet (3342) to drive the adjusting block (333) to move upward. The adsorption force between the first rack (341) and the second magnet (3342) is greater than the gravity of the adjustment block (333), the transmission member (335) comprises a transmission rod (3351) arranged on the first rack (331), the adjustment block (333) is provided with an inclined surface, the distance from the inclined surface to the first connecting rod (321) decreases from top to bottom, the transmission rod (3351) is used for relative sliding contact with the inclined surface on the adjustment block (333), the first rack (331) is provided with a return spring (4), and the end of the return spring (4) away from the first rack (331) is arranged on the first connecting rod (321).

2. The all-round positioning tool for friction stir welding according to claim 1, characterized in that: When the return spring (4) is in a natural state, the first rack (331) and the second rack (332) are in a disengaged state, and when the second magnet (3342) on the adjustment block (333) is adsorbed and matched with the first magnet (3341), the adjustment block (333) is in contact with the transmission rod (3351), and the first rack (331) and the second rack (332) are meshed.

3. The omnidirectional positioning tool for friction stir welding according to claim 1, characterized in that: The driving source (34) comprises a first cylinder (341) mounted on the workbench (1); one end of the clamping block (31) away from the placement position of the heat sink component is hinged to the end of the piston rod of the first cylinder (341); the clamping and fixing unit also comprises a first control valve stem (12) arranged on the workbench (1); the first cylinder (341) is wirelessly connected to the first control valve stem (12).

4. The omnidirectional positioning tool for friction stir welding according to claim 1, characterized in that: A plurality of rotating and pressing mechanisms (3) are provided in the clamping and fixing unit, and the rotating and pressing mechanisms (3) are used to correspond to the heat sink component located above.

5. The omnidirectional positioning tool for friction stir welding according to claim 1, characterized in that: A plurality of the clamping and fixing units are provided, and the plurality of the clamping and fixing units are arranged at intervals along the length direction of the tooling table (1).

6. An omnidirectional positioning tool for friction stir welding according to any one of claims 1 to 5, characterized in that: The horizontal fixing mechanism (2) comprises a fixed seat (21) arranged on the workbench (1), a sliding seat (22) slidably arranged on the workbench (1), and a sliding member (23) arranged on the workbench (1); the fixed seat (21) and the sliding seat (22) are arranged opposite to each other, the sliding direction of the sliding seat (22) is arranged in a horizontal direction, and the sliding member (23) is used to adjust the sliding seat (22) to slide in a direction close to or away from the fixed seat (21).

7. The all-round positioning tool for friction stir welding according to claim 6, characterized in that: The sliding member (23) comprises a second cylinder (231) arranged on the workbench (1) and a single-sided inclined block (232) arranged on the movable end of the second cylinder (231); the extension direction of the second cylinder (231) is arranged in the vertical direction; the single-sided inclined block (232) is located on the side of the sliding seat (22) away from the fixed seat (21); the side of the single-sided inclined block (232) close to the sliding seat (22) is an inclined surface, and the inclined surface is inclined upward toward the side close to the sliding seat (22); the sliding seat (22) and the inclined surface of the single-sided inclined block (232) are slidably matched; the clamping and fixing unit also comprises a second control valve rod (13) arranged on the workbench (1); the second cylinder (231) is wirelessly connected to the second control valve rod (13).

Images