Omnibearing positioning tool for friction stir welding

Abstract

The invention relates to an omni-directional positioning tool for friction stir welding, and belongs to the technical field of cooling fin welding, the omni-directional positioning tool for friction stir welding comprises a tool table and a clamping and fixing unit arranged on the tool table, and the clamping and fixing unit comprises a horizontal fixing mechanism and a rotary pressing mechanism which are arranged on the tool table; the rotary pressing mechanism comprises a pressing block, a telescopic connecting rod hinged to the pressing block, a fixing assembly arranged on the telescopic connecting rod and a driving source arranged on the tool table, the hinged axis of the telescopic connecting rod is arranged in the horizontal direction, and the end, away from the pressing block, of the telescopic connecting rod is hinged to the tool table; the fixing assembly is used for limiting stretching of the telescopic connecting rod or relieving limitation on stretching of the telescopic connecting rod. The driving source is used for driving the end, away from the cooling fin part placing position, of the pressing block to move upwards or downwards. The tool has the effects that the tool can be suitable for combined heat dissipation structures with different thicknesses, and the application range of the tool is widened.

Description

Technical Field

[0001] The invention relates to the technical field of heat sink welding, and in particular to an omnidirectional positioning tool for friction stir welding. Background Art

[0002] Friction stir welding is a solid-state welding technology that achieves material connection through mechanical stirring and friction heat. It is mainly suitable for welding materials such as aluminum alloys, magnesium alloys, and copper alloys.

[0003] In the processing of combined heat dissipation structures, stir friction welding is usually used to weld the upper and lower heat sink components together to form a heat sink structure, wherein the upper surface of the heat sink component located at the bottom is provided with a groove, and the heat sink component located at the top is used to be fixedly embedded in the groove. During operation, the heat sink component located at the top is first embedded in the groove of the heat sink component located at the bottom, and the combined heat sink is placed on the tooling, and then the heat sink component located at the bottom is clamped and fixed by the tooling, and then the heat sink component located at the top is pressed tightly against the groove of the heat sink component located at the bottom, and then the welding head of the stir friction welding is used to spot weld the two heat sink components at the fitting position, and then the tooling is released to unlock the heat sink component located at the top to make way for the welding head, and then the welding is performed along the circumference of the fitting position of the two heat sink components by the welding head.

[0004] At present, in order to facilitate the adjustment of the tooling to lock or make way for the heat sink components located above, electric or pneumatic fixing methods have appeared in the tooling. However, the electric or pneumatic fixing methods can often only fix combined heat dissipation structures of the same thickness, resulting in a smaller scope of application. Summary of the invention

[0005] In order to be applicable to combined heat dissipation structures of different thicknesses and expand the application scope of the tooling, the present invention provides an omnidirectional positioning tooling for friction stir welding.

[0006] The present invention provides an all-round positioning tool for friction stir welding, which adopts the following technical solution: 10. The 30th anniversary celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the Chinese celebration of the

[0007] Preferably, the telescopic link includes a first link hinged on the workbench and a second link slidably inserted into the first link, the sliding direction of the second link is perpendicular to the hinge axis of the first link, the end of the second link away from the first link is hinged on the clamping block, an elastic member for supporting the second link is arranged between the first link and the second link, the elastic force of the elastic member is greater than the sum of the gravity of the clamping block and the second link, the fixing assembly is arranged on the first link, and the fixing assembly is used to fix the second link relative to the first link or release the relative fixation between the second link and the first link.

[0008] Preferably, the fixing assembly 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 workbench, an adsorption member arranged on the clamping 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 parallel to the sliding direction of the second connecting rod, the first rack is used to engage with the second rack, the adjusting block is located below the clamping block, the sliding direction of the adjusting block is set in the vertical direction, the adsorption member is used to adsorb the adjusting block and move it upward after the clamping block is rotated to a horizontal state, and the transmission member is used to push the first rack to slide in a direction close to the second rack when the adjusting block moves upward.

[0009] Preferably, the adsorption member includes a first magnet arranged on the clamping block and a second magnet arranged on the adjusting block, the first magnet is used to adsorb the second magnet to drive the adjusting block to move upward, and the adsorption force between the first magnet and the second magnet is greater than the gravity of the adjusting block.

[0010] Preferably, the transmission member includes a transmission rod arranged on the first rack, the adjusting block is provided with an inclined surface, the distance from the inclined surface to the first connecting rod decreases from top to bottom, the transmission rod is used to slide relative to the inclined surface on the adjusting block, a return spring is provided on the first rack, and the end of the return spring away from the first rack is arranged on the first connecting rod, 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 is meshed with the second rack.

[0011] Preferably, the driving source includes a first cylinder installed on a workbench, and one end of the clamping block away from the placement position of the heat sink component is hinged to the end of the piston rod of the first cylinder. The clamping and fixing unit also includes a first control valve stem arranged on the workbench, and the first cylinder is wirelessly connected to the first control valve stem.

[0012] Preferably, a plurality of rotating and pressing mechanisms are provided in the clamping and fixing unit, and the rotating and pressing mechanisms are used to correspond to the heat sink component located above.

[0013] Preferably, 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.

[0014] Preferably, the horizontal fixing mechanism includes a fixed seat arranged on the workbench, a sliding seat slidably arranged on the workbench and a sliding member arranged on the workbench, the fixed seat and the sliding seat are arranged opposite to each other, the sliding direction of the sliding seat is arranged along the horizontal direction, and the sliding member is used to adjust the sliding seat to slide in a direction close to or away from the fixed seat.

[0015] Preferably, the sliding member includes a second cylinder arranged on the workbench and a single-sided inclined block arranged on the movable end of the second cylinder, the extension direction of the second 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 side of the single-sided inclined block close to the sliding seat is an inclined surface, and the inclined surface is inclined upward toward the side close to the sliding seat, the sliding seat and the inclined surface of the single-sided inclined block are slidably matched, and the clamping and fixing unit also includes a second control valve stem arranged on the workbench, and the second cylinder is wirelessly connected to the second control valve stem.

[0016] In summary, the present invention includes the following beneficial technical effects: During the welding operation, the combined heat dissipation structure that has been embedded up and down is placed on the clamping and fixing unit of the workbench, and then the heat sink component with the groove at the bottom is clamped and fixed in the horizontal direction by the horizontal fixing mechanism, and then the end of the clamping block away from the placement position of the heat sink component is driven by the driving source to move upward. During the movement of the clamping block, the telescopic connecting rod will be driven to rotate in the direction close to the combined heat dissipation structure. After the clamping block abuts against the heat sink component, as the driving source drives the end of the clamping block away from the heat sink component to continue to move upward, the telescopic connecting rod cooperates with the rotation of the clamping block and extends. Until the clamping block rotates to a horizontal state to press the heat sink component located on the upper side during welding into the groove of the heat sink component located on the lower side during welding, and then limit the extension and retraction of the telescopic connecting rod by the fixing assembly, so as to maintain the clamping effect of the clamping block on the heat sink component; because the telescopic connecting rod can be extended in coordination with the rotation of the clamping block as the driving source continues to move upward after the end of the clamping 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 can adapt to combined heat dissipation structures of different thicknesses, thereby expanding the scope of application of the tooling to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a horizontal schematic diagram of the overall structure of an embodiment of the present invention.

[0018] Figure 2 It is a cross-sectional view of the transverse structure of a single group of clamping and fixing units in an embodiment of the present invention.

[0019] Figure 3 It is a structural schematic diagram of the rotary pressing mechanism in an embodiment of the present invention.

[0020] Figure 4 It is a structural schematic diagram of another angle of the rotating pressing mechanism in an embodiment of the present invention.

[0021] Figure 5 It is a partial cross-sectional view of another state of the rotary clamping mechanism in the embodiment of the present invention.

[0022] Figure 6 yes Figure 5 Enlarged view of part A.

[0023] Figure 7 It is a structural schematic diagram of the horizontal fixing mechanism in an embodiment of the present invention.

[0024] 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

[0025] The following combination Figure 1-Figure 7 The present invention is described in further detail.

[0026] 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.

[0027] 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.

[0028] Reference Figure 2 and Figure 3One end of the telescopic link 32 is hinged on the clamping block 31, and the other end is hinged on the workbench 1. The hinge axis of the telescopic link 32 is arranged in the horizontal direction, and the hinge axis of the telescopic link 32 is perpendicular to the length direction of the clamping block 31. The telescopic direction of the telescopic link 32 is perpendicular to the hinge axis of the telescopic link 32. The clamping block 31 is movably connected to the workbench 1 through the telescopic link 32; the driving source 34 is fixedly installed on the workbench 1, and the driving source 34 is located on the side of the telescopic link 32 away from the placement position of the heat sink component. The driving source 34 is used to drive the end of the clamping block 31 away from the placement position of the heat sink component to move upward or downward. The fixing component 33 is arranged on the telescopic link 32, and the fixing component 33 is used to limit the extension and retraction of the telescopic link 32 or release the restriction on the extension and retraction of the telescopic link 32.

[0029] When the rotating clamping mechanism 3 is in the initial state, the end of the clamping block 31 away from the placement position of the heat sink component is close to the surface of the workbench 1, and the end of the clamping block 31 close to the placement position of the heat sink component is tilted upward, and the upper end of the telescopic connecting rod 32 is inclined 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.

[0030] During welding, the combined heat dissipation structure that has been inserted up and down is first placed on the clamping and fixing unit of the workbench 1, and then the heat sink component with the groove located below is clamped and fixed in the horizontal direction by the horizontal fixing mechanism 2, and then the end of the clamping block 31 away from the placement position of the heat sink component is driven upward by the driving source 34. At this time, the clamping block 31 will drive the telescopic connecting rod 32 to rotate in the direction close to the heat sink component. After the clamping block 31 abuts against the heat sink component, as the driving source 34 continues to drive the clamping block 31 to move upward away from the end of the heat sink component, the telescopic connecting rod 32 will cooperate with the clamping block 3 1, until the pressing block 31 rotates to a horizontal state to press the heat sink component located above into the groove of the heat sink component located below. At this time, the telescopic link 32 is limited by the fixing assembly 33, so that the pressing effect of the pressing block 31 is guaranteed when the driving source 34 is fixed and the telescopic link 32 is limited. After the end of the pressing block 31 abuts against the heat sink component, the telescopic link 32 can extend in coordination with the rotation of the pressing block 31 as the driving source 34 continues to move upward, so that it can adapt to combined heat dissipation structures of different thicknesses, thereby expanding the scope of application of the tooling to a certain extent.

[0031] Then, the welding head of the friction stir welding is used to spot weld the joints of the two heat sink components that are embedded in the upper and lower parts. Then, the driving source 34 is used to 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 away from the heat sink component. Then, the telescopic restriction on the telescopic connecting rod 32 is released by the fixing assembly 33. As the driving source 34 continues to drive the end of the clamping block 31 to move downward, the end of the clamping block 31 that abuts 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, so as to make way for the friction welding welding head, thereby quickly locking or releasing the heat sink component and ensuring welding efficiency. Thereafter, the welding head of the friction stir welding can be used to weld the joints of the two heat sink components that are embedded in the upper and lower parts along the circumferential direction. 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 suitable for welding processing of heat sink components of different thicknesses.

[0032] Reference Figure 2 , there are multiple rotating clamping mechanisms 3 in each group of clamping and fixing units, and the rotating clamping mechanisms 3 are used to correspond to the heat sink component located above. Specifically, when the cross-sectional area of ​​the heat sink component located above and embedded in the groove is greater than the preset value, it corresponds to four rotating clamping mechanisms 3, and the four rotating clamping mechanisms 3 are located at the four corners of the heat sink component to achieve all-round clamping and positioning of the workpiece; and when the cross-sectional area of ​​the heat sink component located above is less than the preset value, it can correspond to only one rotating clamping mechanism 3, wherein the preset value can be set as needed. In an embodiment of the present invention, two grooves are provided on the heat sink component located below, and a heat sink component is embedded in each groove, one of which has a cross-sectional area greater than the preset value, and is clamped and fixed by four rotating clamping mechanisms 3 located at the four corners; the other heat sink component has a cross-sectional area less than the preset value, and is clamped and fixed by one rotating clamping mechanism 3. In other embodiments, the number of rotating clamping mechanisms 3 can be set as needed.

[0033] Reference Figure 2 , Figure 3 and Figure 4In order to facilitate the end of the clamping block 31 away from the heat sink component to move upward or downward, a mounting groove 5 is provided on the tooling table 1, and the mounting groove 5 corresponds to the clamping block 31 one by one. The mounting groove 5 is located below the corresponding clamping block 31. The driving source 34 includes a first cylinder 341, which is embedded in the mounting groove 5 below the corresponding clamping block 31. The extension direction of the first cylinder 341 is set in the vertical direction. The end of the clamping block 31 away from the heat sink component is hinged to the piston rod end of the corresponding first cylinder 341. The hinge axis between the clamping block 31 and the piston rod of the first cylinder 341 is parallel to the hinge axis between the clamping block 31 and the telescopic connecting rod 32. Each group of clamping and fixing units also includes a first control valve stem 12 installed on the tooling table 1, and the first cylinder 341 in each group of clamping and fixing units is wirelessly connected to the corresponding first control valve stem 12. In other embodiments, the first cylinder 341 can be replaced by an electric cylinder, an electric push rod, etc.

[0034] When in use, the first cylinder 341 is driven to work by operating the first control valve stem 12, so that the first cylinder 341 drives the corresponding clamping block 31 to move upward or downward away from the end of the heat sink component, thereby realizing the clamping or giving way of the clamping block 31. The use of pneumatic fixing method can greatly save the switching time of the clamping block 31 between clamping and giving way, thereby ensuring welding efficiency.

[0035] Reference Figure 3 Each of the pressing blocks 31 has two hinged telescopic connecting rods 32 , and the two telescopic connecting rods 32 are located on opposite sides of the corresponding pressing block 31 , which helps to enhance the rotation stability of the pressing block 31 .

[0036] Reference Figure 2 and Figure 3 A mounting plate 6 is fixed to the cylinder body of each first cylinder 341, and the mounting 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 on the mounting plate 6 below the corresponding clamping block 31, and the hinge axis of the first connecting rod 321 is perpendicular to the length direction of the corresponding clamping block 31, so that the two first connecting rods 321 corresponding to the clamping block 31 are hinged on both sides of the corresponding mounting plate 6; the second connecting rod 322 is slidably arranged on the corresponding In the first connecting rod 321, the sliding direction of the second connecting rod 322 is perpendicular to the hinge axis of the first connecting rod 321, and the end of the second connecting rod 322 away from the first connecting rod 321 is hinged on the side of the corresponding clamping block 31, and the distance from the hinge point of the second connecting rod 322 and the corresponding clamping block 31 to the side of the clamping 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 clamping block 31 to the side of the clamping block 31 away from the heat sink component, so that the end of the clamping block 31 close to the heat sink component can rotate in a larger range.

[0037] Reference Figure 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 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 clamping block 31 and the second connecting rod 322. The fixing assembly 33 is provided on the first connecting rod 321. Specifically, the elastic member includes a pulling spring 7. The pulling spring 7 is located at the first connecting rod 321. In the rod 321, the extension 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 to the side of the corresponding second connecting rod 322 close to the first connecting rod 321, and the other end is fixed to the inner wall of the first connecting rod 321 away from the corresponding clamping block 31. The elastic force of the pulling spring 7 is greater than the sum of the gravity of the clamping block 31 and the 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 clamping block 31.

[0038] When the clamping block 31 rotates to a horizontal state and the pulling spring 7 is in a natural state, the distance from the lower surface of the clamping block 31 to the upper surface of the workbench 1 is the standard thickness of the combined heat dissipation structure. In the processing of the combined heat dissipation structure of standard thickness, the clamping block 31 rotates to drive the telescopic link 32 to rotate. Under the action of the elastic force of the pulling spring 7, no relative sliding will occur between the second link 322 and the first link 321 of the telescopic link 32. When the thickness of the combined heat dissipation structure is greater than the standard thickness, before the clamping block 31 rotates to a 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 clamping block 31 to move upward at one end away from the heat sink component, the clamping block 31 will pull the corresponding two second connecting rods 322 to move in a direction away from the workbench 1, thereby extending the telescopic connecting rod 32, and under the pulling force of the pulling spring 7, the end of the clamping block 31 close to the heat sink component is always in abutment with the heat sink component until the first cylinder 341 drives the clamping block 31 to a horizontal state. At this time, the pulling spring 7 is in a stretched state, and the second connecting rod 322 is relatively fixed to the first connecting rod 321 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 be slidably adjusted according to different combined heat dissipation structure components with a thickness greater than the standard, it can be suitable for combined heat dissipation structures of different thicknesses, thereby expanding the scope of application.

[0039] Reference Figure 5 and Figure 6The first gear 331 is provided with a plurality of teeth, and the plurality of teeth 332 are provided with a plurality of teeth 333 to be connected to the plurality of gears 334. The plurality of teeth 333 are provided with a plurality of teeth 335 to be connected to the plurality of gears 336. The plurality of teeth 337 are provided with a plurality of teeth 338 to be connected to the plurality of gears 339.

[0040] Reference Figure 5 and Figure 6 The second rack 332 corresponds to the second connecting rod 322 one by one, and the second rack 332 is fixed on the side of the second connecting rod 322 close to the corresponding clamping block 31. The length directions of the first rack 331 and the second rack 332 are parallel to the sliding direction of the second connecting rod 322. A notch (not marked in the figure) is provided on the side of the first connecting rod 321 close to the corresponding clamping block 31 for the first rack 331 to slide through, and the first rack 331 is used to mesh with the second rack 332 through the notch.

[0041] Reference Figure 3 and Figure 5 The adjusting block 333 is located below the corresponding pressing block 31, and the adjusting block 333 is slidably set on the corresponding mounting plate 6. The sliding direction of the adjusting block 333 is set in the vertical direction. A vertical rod (not marked in the figure) is fixed on the mounting plate 6 for guiding the sliding of the adjusting block 333. The adsorption member 334 is set on the pressing block 31. 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 set 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.

[0042] Reference Figure 5In order to facilitate the upward movement of the adjustment block 333 by adsorbing the clamping block 31 after the clamping block 31 rotates to a horizontal state, the adsorbing member 334 includes a first magnet 3341 and a second magnet 3342. The first magnet 3341 is fixed on a side of the clamping 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. In order to ensure that the first magnet 3341 can only adsorb the second magnet 3342 to move after the clamping block 31 rotates to a horizontal state, a limiting frame 11 is fixed on a side of the clamping block 31 close to the mounting plate 6. The first magnet 3341 is located in the limiting frame 11. The thickness of the limiting frame 11 is set as required so that when the clamping block 31 is not in a horizontal state, the first magnet 3341 will not adsorb the second magnet 3342.

[0043] Reference Figure 3 and Figure 6 In order to facilitate the first rack 331 to slide toward 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 penetrated on the first rack 331, one end of the transmission rod 3351 is slidably penetrated on the corresponding first connecting rod 321, and the other end extends toward the adjustment block 333, and the opposite sides of the adjustment block 333 are provided with inclined surfaces, and the inclined surfaces correspond to the transmission rod 3351 one by one. The distance from the inclined surface to the first connecting rod 321 on the corresponding side decreases from top to bottom, and the transmission rod 3351 is used to be aligned with the corresponding inclined surface on the adjustment block 333 Relative sliding abutment, the side of the transmission rod 3351 close to the adjustment block 333 is an outward convex arc surface, which is convenient for relative sliding with the inclined surface 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 a 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 matched with the first magnet 3341, the plane connected below the inclined surface of the adjustment block 333 abuts against the transmission rod 3351 on the corresponding side, and the first rack 331 and the second rack 332 are in a meshing state.

[0044] When one end of the clamping block 31 close to the heat sink component is tilted upward and is 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 inclined surface on the adjustment block 333 are in a disengaged state, and the return spring 4 is in a natural state, so that the first rack 331 and the second rack 332 are in a disengaged state, thereby facilitating the clamping block 31 to rotate toward the direction close to the heat sink component.

[0045] 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, so that the first magnet 3341 gradually aligns with the corresponding second magnet 3342. When the pressing block 31 rotates to a horizontal state to press 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, and then the first magnet 3341 attracts the second magnet 3342 to drive the adjustment block 333 toward the pressing block. The tightening block 31 moves in the direction of the tightening block 31, and then the inclined surface of the adjusting block 333 slides relative to the transmission rod 3351 on the corresponding side, and the inclined surface of the adjusting block 333 abuts the transmission rods 3351 on both sides to drive the first rack 331 close to the second rack 332, until the plane below the inclined surface of the adjusting block 333 abuts against the transmission rod 3351 on the corresponding side, the first rack 331 is meshed with the second rack 332, and the first connecting rod 321 and the second connecting rod 322 are relatively fixed, thereby ensuring the clamping effect of the clamping block 31 in the horizontal state.

[0046] Reference Figure 3 and Figure 5 A vertical plate 14 is fixed on the mounting plate 6, and the vertical plate 14 corresponds to the first connecting rod 321 one by one. The vertical plate 14 is located on the side of the corresponding first connecting rod 321 away from the piston rod of the first cylinder 341, and the vertical plate 14 is 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 toward the direction close to the heat sink component.

[0047] Reference Figure 2 and Figure 7 In order to facilitate the clamping and fixing of the heat sink component located below from 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 workbench 1 by bolts. The workbench 1 is provided with a sliding groove 9. The sliding seat 22 is slidably set in the sliding groove 9. The sliding direction of the sliding seat 22 is set in the horizontal direction. The fixed seat 21 and the sliding seat 22 are arranged opposite to each other. 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 set in the sliding groove 9. The sliding member 23 is used to adjust the sliding seat 22 to slide in the direction close to or away from the fixed seat 21.

[0048] Reference Figure 2 and Figure 7In order to facilitate the adjustment of the sliding seat 22 to slide in the direction close to or away from the fixed seat 21, the sliding member 23 includes a second cylinder 231 and a single-sided inclined block 232. The second cylinder 231 is fixedly embedded in the sliding groove 9. The extension direction of the second cylinder 231 is set in the vertical direction. The single-sided inclined block 232 is fixed on the moving end of the second cylinder 231. The single-sided inclined block 232 is slidably penetrated in the sliding groove 9, and 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. The distance from the inclined surface to the fixed seat 21 increases from top to bottom. The sliding seat 22 and the inclined surface of the single-sided inclined block 232 are slidably matched. The clamping and fixing unit also includes a second control valve stem 13 arranged on the workbench 1. The second cylinder 231 is wirelessly connected to the second control valve stem 13.

[0049] When it is necessary to drive the sliding seat 22 to slide in the direction close to the fixed seat 21, the second control valve stem 13 is operated, and the second cylinder 231 is started to drive the single-sided inclined block 232 to move downward. Since the inclined surface of the single-sided inclined block 232 slides with the sliding seat 22, the single-sided inclined block 232 slides in the direction close to the fixed seat 21 through the inclined surface during the downward movement, thereby helping 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 away from the fixed seat 21, the second control valve stem 13 is operated, and the second cylinder 231 is started to drive the single-sided inclined block 232 to move upward. At this time, the single-sided inclined block 232 pulls the sliding seat 22 to slide in the direction away from the fixed seat 21 during the upward movement, which helps to loosen the heat sink component located below during welding, thereby facilitating the removal of the heat sink component.

[0050] Reference Figure 2 and Figure 7 In order to help guide the sliding of the single-sided 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 single-sided inclined block 232 away from the sliding seat 22, and the plane of the single-sided inclined block 232 away from the sliding seat 22 is slidably matched with the guide block 10.

[0051] Reference Figure 2 and Figure 7 , each clamping and fixing unit has two sets of horizontal fixing mechanisms 2, in which the arrangement direction of the fixed seat 21 and the sliding seat 22 in one set of horizontal fixing mechanisms 2 is perpendicular to the arrangement direction of the fixed seat 21 and the sliding seat 22 in the other set of horizontal fixing mechanisms 2, and 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 each set of horizontal fixing mechanisms 2 of the clamping and fixing units into two sets helps to improve the clamping and fixing effect of the heat sink component, and the second cylinders 231 in the clamping and fixing units are wirelessly connected to the second control valve stem 13.

[0052] The implementation principle of the embodiment of the present invention is: when the combined heat dissipation structure is not placed on the tooling, the horizontal fixing mechanism 2 and the rotating clamping mechanism 3 are in the initial state, wherein the sliding seat 22 is located away from the corresponding fixing seat 21, the piston rod of the first cylinder 341 is in a retracted state, the end of the clamping block 31 away from the placement position of the heat sink component is close to the surface of the tooling table 1, and the end close to the placement position of the heat sink component is tilted upward, and the telescopic connecting rod 32 is inclined toward the piston rod of the corresponding first cylinder 341, thereby providing sufficient space for the placement of the combined heat dissipation structure.

[0053] During welding, the combined heat dissipation structure that has been fitted together is placed on the clamping and fixing unit of the workbench 1, so that the lower heat sink component in the combined heat dissipation structure is located between the sliding seat 22 and the corresponding fixing seat 21, and the adjacent two sides of the heat sink component located below are respectively abutted against the two fixing seats 21 in the clamping and fixing unit, and then the corresponding second control valve stem 13 is operated. The second control valve stem 13 starts the two second cylinders 231 to synchronously drive the corresponding single-sided bevel block 232 to move downward. During the downward movement, the single-sided bevel block 232 slides toward the direction close to the corresponding fixing seat 21 through the inclined surface abutting the sliding seat 22, thereby clamping and fixing the heat sink component located below during welding.

[0054] Then, the first control valve stem 12 is operated to drive the multiple first cylinders 341 in the corresponding clamping and fixing units to work, so that the first cylinder 341 synchronously drives the corresponding clamping block 31 to move upward away from the end 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 heat sink component. After the end of the clamping block 31 abuts against the edge of the heat sink component, as the driving source 34 continues to drive the clamping block 31 to move upward away from the end of the heat sink component, the second connecting rod 322 and the first connecting rod 321 slide relative to each other, so that the telescopic connecting rod 32 is extended to cooperate with the rotation of the clamping block 31, until the clamping block 31 rotates to a horizontal state to press the heat sink component located above into the groove of the heat sink component located below. At this time, the first magnet 3341 and the corresponding second magnet 3341 342 is aligned, then the first magnet 3341 attracts the second magnet 3342 to drive the adjusting block 333 to move towards the direction close to the clamping block 31, then the inclined surface of the adjusting block 333 slides relatively with the transmission rod 3351 on the corresponding side, and the adjusting block 333 abuts the transmission rod 3351 on both sides to drive the first rack 331 close to the second rack 332, until the first magnet 3341 and the corresponding second magnet 3342 are adsorbed and fixed, and the plane below the inclined surface of the adjusting block 333 abuts the transmission rod 3351, at this time, the first rack 331 is meshed with the second rack 332, so as to realize the relative fixation of the first connecting rod 321 and the second connecting rod 322, so that the clamping block 31 in the horizontal state cannot rotate when the corresponding first cylinder 341 stops working. Since the telescopic connecting rod 32 can be extended in coordination with the rotation of the clamping block 31 as the piston rod of the first cylinder 341 continues to move upward after the end of the clamping block 31 abuts against the heat sink component, it can adapt to combined heat dissipation structures of different thicknesses, thereby expanding the scope of application of the tooling to a certain extent.

[0055] 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.

[0056] 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.

[0057] 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 fix a heat sink component with a groove located below in a horizontal direction. The invention is used to press the heat sink component located above into the groove of the heat sink component located below. The hinge axis of the telescopic link (32) is arranged in the horizontal direction. The 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 component (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.

2. The all-round positioning tool for friction stir welding according to claim 1, characterized in that: 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 hinge axis of the first link (321); one end of the second link (322) away from the first link (321) is hinged on the clamping block (31); an elastic member for supporting the second link (322) is arranged between the first link (321) and the second link (322); the elastic force of the elastic member is greater than the sum of the weights of the clamping block (31) and the second link (322); the fixing assembly (33) is arranged on the first link (321); the fixing assembly (33) is used to relatively fix the second link (322) and the first link (321) or release the relative fixation between the second link (322) and the first link (321).

3. The omnidirectional positioning tool for friction stir welding according to claim 2, characterized in that: The fixing assembly (33) comprises a first rack (331) slidably arranged on the first connecting rod (321), 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), wherein the sliding direction of the first rack (331) is perpendicular to the sliding direction of the first connecting rod (321), and the length direction of the first rack (331) and the second rack (332) are perpendicular to each other. 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 set in the vertical direction. The adsorption member (334) is used to adsorb the adjusting block (333) and move it upward after the pressing block (31) is rotated to a horizontal state. The transmission member (335) is used to push the first rack (331) to slide in a direction close to the second rack (332) when the adjusting block (333) moves upward.

4. The all-round positioning tool for friction stir welding according to claim 3, characterized in that: The adsorption member (334) comprises 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 magnet (3341) and the second magnet (3342) is greater than the gravity of the adjusting block (333).

5. The omnidirectional positioning tool for friction stir welding according to claim 3, characterized in that: The transmission member (335) comprises a transmission rod (3351) arranged on the first rack (331); an inclined surface is arranged on the adjustment block (333); the distance between the inclined surface and the first connecting rod (321) decreases from top to bottom; the transmission rod (3351) is used for slidingly abutting against the inclined surface on the adjustment block (333); a return spring (4) is arranged on the first rack (331); one end of the return spring (4) away from the first rack (331) is arranged on the first connecting rod (321); when the return spring (4) is in a 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) and the first magnet (3341) are adsorbed and matched, the adjustment block (333) and the transmission rod (3351) abut against each other, and the first rack (331) and the second rack (332) are meshed.

6. 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).

7. 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.

8. 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).

9. An omnidirectional positioning tool for friction stir welding according to any one of claims 1 to 8, 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).

10. The all-round positioning tool for friction stir welding according to claim 9, 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).

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