Friction stir welding clamp and method for aluminum alloy liquid cooling plate

Abstract

The invention provides an aluminum alloy liquid cooling plate friction stir welding clamp and method, and relates to the technical field of liquid cooling plate welding. The aluminum alloy liquid cooling plate friction stir welding clamp comprises a support used for being fixed to a friction stir welding equipment platform; the clamping mechanism comprises a driving assembly and two clamping plates, the driving assembly is in driving connection with the two clamping plates, so that the two clamping plates synchronously move towards each other or move away from each other, and grooves are formed in the top sides of the opposite surfaces of the two clamping plates; and the welding surface expanding mechanism comprises a barrier strip, the barrier strip is used for abutting against the top of the side face of the aluminum alloy liquid cooling plate, and the barrier strip is arranged in the groove in a lifting mode. According to the clamping device, the clamping requirements of aluminum alloy liquid cooling plates with different heights are met within a certain range, particularly, the two sides of the tops of the aluminum alloy liquid cooling plates abut against each other in a targeted mode through the height adjustability of the two barrier strips, and then the clamping stability during friction stir welding is improved.

Description

Technical Field

[0001] This invention relates to the field of liquid-cooled plate welding technology, and more specifically, to a friction stir welding fixture and method for aluminum alloy liquid-cooled plates. Background Technology

[0002] In the liquid-cooled plate manufacturing industry, many types of aluminum alloy cold-cooled plates require internal cavity sealing via friction stir welding. The suitability and stability of the clamping fixtures used to hold the liquid-cooled plate during the welding process have a crucial impact on weld formation and quality. In some cases, the welding sealing surface of the liquid-cooled plate is located on the side of the plate (i.e.,...). Figure 2 The top surface of the aluminum alloy liquid cooling plate 100 has three sealing block parts 110 that need to be welded. The weld seam is along the outer contour circumferential direction of the sealing block parts 110 that need to be welded. If the liquid cooling plate is placed horizontally for welding using the traditional method, the melting depth and appearance requirements of the product cannot be met, or even welding may not be possible.

[0003] Chinese Patent Publication No. CN117245316A discloses a friction stir welding fixture and method for aluminum alloy liquid cooling plates. However, the fixture relies on manual operation for clamping, which seriously affects the welding efficiency of aluminum alloy liquid cooling plates. Furthermore, its stops cannot be adapted to aluminum alloy liquid cooling plates of different heights, which has certain limitations in actual production. Summary of the Invention

[0004] To address the above problems, this invention provides an aluminum alloy liquid-cooled plate friction stir welding fixture and method.

[0005] In a first aspect, the present invention provides an aluminum alloy liquid-cooled plate friction stir welding fixture, comprising: A bracket is used to fix the friction stir welding equipment platform. The clamping mechanism includes a drive assembly and two clamping plates. The drive assembly is driven to the two clamping plates so that the two clamping plates move synchronously toward each other or move apart. The top sides of the opposite surfaces of the two clamping plates are provided with grooves. The welding surface expansion mechanism includes a stop bar, which is used to abut against the top side of the aluminum alloy liquid cooling plate, and the stop bar is vertically and flexibly disposed in the groove.

[0006] Optionally, the welding surface expansion mechanism further includes an inclined top bar, the bar having a horizontal surface at the top, a short vertical surface on one side, a long vertical surface on the other side, and an inclined surface at the bottom. The upper surface of the inclined top bar slides in contact with the inclined surface at the bottom of the bar, and the inclined top bar is used to slide within the groove to raise and lower the bar.

[0007] Optionally, rubber pads are provided on the opposite surfaces of both clamping plates.

[0008] Optionally, the clamping plate is further provided with a heat dissipation mechanism, the heat dissipation mechanism comprises a liquid inlet main flow channel, a liquid outlet main flow channel and liquid cooling branch flow channels integrally formed in the clamping plate, the liquid inlet main flow channel is close to the upper edge of the clamping plate, the liquid outlet main flow channel is close to the lower edge of the clamping plate, a plurality of liquid cooling branch flow channels are equidistantly arranged between the liquid inlet main flow channel and the liquid outlet main flow channel, and the two liquid cooling branch flow channels on both sides are close to the two side edges of the clamping plate, respectively, and the two ends of the liquid cooling branch flow channel are communicated with the liquid inlet main flow channel and the liquid outlet main flow channel, respectively.

[0009] Optionally, the heat dissipation mechanism further comprises an opening and closing assembly, and each opening and closing assembly is arranged at the communication position of the liquid cooling branch flow channel and the liquid inlet main flow channel, and when the opening and closing assembly is pressed, the opening and closing assembly is used for enabling the corresponding liquid cooling branch flow channel to be communicated with the liquid inlet main flow channel.

[0010] Optionally, the opening and closing assembly comprises a rubber ball, a pressing rod and a lower liquid passage, one end of the pressing rod is connected to the rubber pad, the other end of the pressing rod penetrates into the liquid inlet main flow channel and is connected with the rubber ball, the communication position of the liquid cooling branch flow channel and the liquid inlet main flow channel is provided as an arc-shaped groove, when the pressing rod is in an initial state, the rubber ball is located in the arc-shaped groove, when the pressing rod pushes the rubber ball, the lower liquid passage is formed between the rubber ball and the arc-shaped groove.

[0011] Optionally, the opening and closing assembly further comprises a floating ball and a rubber skin, the rubber ball is provided as a hollow structure, a plurality of liquid holes are arranged on the peripheral surface of the rubber ball, the floating ball is arranged in the rubber ball, the rubber skin is connected to the inner peripheral surface of the rubber ball, the rubber skin and the inner peripheral surface of the rubber ball form a negative pressure cavity, the floating ball is connected with the rubber skin, the peripheral surface of the rubber ball is further provided with a suction hole, one end of the suction hole faces the lower liquid passage, and the other end of the suction hole is communicated with the negative pressure cavity.

[0012] Optionally, the welding surface expansion mechanism further comprises a distance adjusting bolt, the distance adjusting bolt is threadedly connected to the top of the clamping plate, the end of the distance adjusting bolt is provided with a ball head, and the inclined top strip is provided with a ball groove for movably connecting the ball head.

[0013] Optionally, the aluminum alloy liquid cooling plate friction stir welding clamp further comprises two supporting plates and four sliding seats, the two supporting plates are connected to the bottom sides of the opposite faces of the two clamping plates, the four sliding seats are respectively connected to the top and bottom of the support, and the top and bottom of the clamping plate are respectively slidably connected to the corresponding sliding seats.

[0014] The aluminum alloy liquid cooling plate friction stir welding clamp has the beneficial effects that: after the support is fixed on the friction stir welding equipment platform, the aluminum alloy liquid cooling plate is placed between the two clamping plates, the two clamping plates are driven to move synchronously and oppositely by the driving assembly, the aluminum alloy liquid cooling plate is clamped, then the height of the stop strip is adjusted according to the height of the top surface of the aluminum alloy liquid cooling plate, and the two stop strips abut against the top two sides of the aluminum alloy liquid cooling plate respectively, so that the clamping requirement of the aluminum alloy liquid cooling plate with different heights is realized within a certain range, and the stability of clamping during friction stir welding is improved, especially through the height adjustability of the two stop strips, the top two sides of the aluminum alloy liquid cooling plate are abutted against specifically, and then the stability of clamping during friction stir welding is improved.

[0015] In a second aspect, the present application provides an aluminum alloy liquid cooling plate friction stir welding method, which adopts the aluminum alloy liquid cooling plate friction stir welding clamp as above, and comprises the following steps: S1: fixing the support on the friction stir welding equipment platform; S2: placing the aluminum alloy liquid cooling plate between the two clamping plates, and driving the two clamping plates to move synchronously and oppositely by the driving assembly to clamp the aluminum alloy liquid cooling plate; S3: adjusting the height of the stop strip, so that the upper surface of the stop strip is in the same horizontal plane as the top surface of the aluminum alloy liquid cooling plate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the aluminum alloy liquid cooling plate friction stir welding clamp of the embodiment of the present application; Figure 2 It is a structural schematic view of the aluminum alloy liquid cooling plate; Figure 3 It is a structural schematic view of the welding surface expansion mechanism in the aluminum alloy liquid cooling plate friction stir welding clamp of the embodiment of the present application; Figure 4 It is a structural schematic view of the stop strip in the aluminum alloy liquid cooling plate friction stir welding clamp of the embodiment of the present application; Figure 5 It is a schematic view of the aluminum alloy liquid cooling plate friction stir welding clamp in clamping a relatively narrow aluminum alloy liquid cooling plate; Figure 6 It is a schematic view of the aluminum alloy liquid cooling plate friction stir welding clamp in clamping a relatively wide aluminum alloy liquid cooling plate; Figure 7 It is a structural schematic view of the heat dissipation mechanism in the aluminum alloy liquid cooling plate friction stir welding clamp of the embodiment of the present application; Figure 8 It is a schematic view of the heat dissipation mechanism in the aluminum alloy liquid cooling plate friction stir welding clamp of the embodiment of the present application when the heat dissipation mechanism is not working; Figure 9 It is a state of the heat dissipation mechanism in the aluminum alloy liquid cooling plate friction stir welding clamp of the embodiment of the present application when the heat dissipation mechanism is working Figure 1 ; Figure 10 The working state of the heat dissipation mechanism in the aluminum alloy liquid cooling plate friction stir welding clamp of the embodiment of the present application Figure 2 .

[0017] Mark explanation: 1, support; 2, welding surface expansion mechanism; 21, blocking strip; 22, inclined top strip; 23, distance adjusting bolt; 3, clamping mechanism; 31, drive assembly; 33, clamping plate; 331, groove; 4, rubber pad; 5, heat dissipation mechanism; 51, liquid inlet main flow channel; 52, liquid outlet main flow channel; 53, liquid cooling branch flow channel; 54, opening and closing assembly; 541, rubber ball; 5411, adsorption hole; 5412, liquid hole; 542, floating ball; 543, rubber; 544, pressing rod; 545, liquid passage; 6, supporting plate; 7, sliding seat; 100, aluminum alloy liquid cooling plate; 110, sealing block part needing welding; 120, cooling flow channel. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0019] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0020] In the description of the present application, the description of the terms "embodiment", "one embodiment", "some embodiments", "exemplarily" and "one embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or embodiment are included in at least one embodiment or embodiment of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0021] The embodiment of the present application provides an aluminum alloy liquid cooling plate friction stir welding clamp, comprising: The support 1 is used for being fixed on the friction stir welding equipment platform; The clamping mechanism 3 comprises a drive assembly 31 and two clamping plates 33, the drive assembly 31 and the two clamping plates 33 are drivingly connected, so that the two clamping plates 33 move synchronously towards each other or away from each other, and the top side of the opposite surface of the two clamping plates 33 is provided with a groove 331; The welding surface expanding mechanism 2 comprises a baffle 21 used for abutting against the side top of the aluminum alloy liquid cooling plate 100, and the baffle 21 is arranged in the groove 331 in a lifting manner.

[0022] Specifically, the baffle 21 is made of aluminum alloy. Before welding, the sealing baffle part 110 to be welded is placed in the mounting groove on the top surface of the aluminum alloy liquid cooling plate 100, and the upper surface of the sealing baffle part 110 to be welded is ensured to be in the same horizontal plane as the top surface of the aluminum alloy liquid cooling plate 100 and the upper surface of the baffle 21. After steps S1, S2 and S3, the aluminum alloy liquid cooling plate 100 is finally welded by using a friction stir welding device to weld the weld seam on the top surface of the aluminum alloy liquid cooling plate 100. The driving assembly 31 can be two hydraulic cylinders, and the output ends of the two hydraulic cylinders are connected with the two clamping plates 33 respectively.

[0023] In this optional embodiment, in combination with Figure 1 , Figure 2 and Figure 3 , first, the support 1 is fixed on the platform of the friction stir welding device, then the aluminum alloy liquid cooling plate 100 is placed between the two clamping plates 33, the two clamping plates 33 are driven by the driving assembly 31 to move synchronously and oppositely, the aluminum alloy liquid cooling plate 100 is clamped, then the height of the baffle 21 is adjusted according to the height of the top surface of the aluminum alloy liquid cooling plate 100, so that the two baffles 21 abut against the two sides of the top of the aluminum alloy liquid cooling plate 100 respectively, thereby realizing the clamping requirement of the aluminum alloy liquid cooling plate 100 with different heights within a certain range, and especially through the height adjustability of the two baffles 21, the two sides of the top of the aluminum alloy liquid cooling plate 100 are abutted against specifically, thereby improving the stability of clamping during friction stir welding.

[0024] Optionally, the welding surface expanding mechanism 2 further comprises an inclined top strip 22, the baffle 21 has a top horizontal surface, a short vertical surface on one side, a long vertical surface on the other side and an inclined surface at the bottom, the upper surface of the inclined top strip 22 is in sliding contact with the inclined surface at the bottom of the baffle 21, and the inclined top strip 22 is used for sliding in the groove 331 to lift or lower the baffle 21.

[0025] In this optional embodiment, in combination with Figure 3 and Figure 4As shown, the horizontal surface of the top of the baffle 21 is used to be at the same level as the top surface of the aluminum alloy liquid cooling plate 100, the long vertical surface of the baffle 21 is used to abut to the top of the side surface of the aluminum alloy liquid cooling plate 100, and the short vertical surface of the baffle 21 is used to abut to the clamping plate 33. In this way, the closer the part of the baffle 21 to the top side surface of the aluminum alloy liquid cooling plate 100, the thicker the thickness of the baffle 21, so that this part can well bear the downward pressure applied by the shaft shoulder of the stirring needle, and the farther the part of the baffle 21 from the top side surface of the aluminum alloy liquid cooling plate 100, the thinner the thickness of the baffle 21, which does not affect the welding process, thereby making the structure of the baffle 21 more reasonable, reducing the manufacturing cost of the baffle 21, and further reducing the welding cost of the aluminum alloy liquid cooling plate 100. By increasing the baffle 21, the welding of the ultra-narrow welding surface weld (the distance between the center position of the weld and the edge of the aluminum alloy liquid cooling plate 100 is small, and the baffle 21 cannot be used for friction stir welding without increasing the baffle 21, and the baffle 21 is equivalent to expanding the support surface to bear the axial downward pressure of the stirring weld without deflection) is realized.

[0026] Further, the opposite surfaces of the two clamping plates 33 are each provided with a rubber pad 4.

[0027] In this optional embodiment, the clamping plate 33 is combined with the baffle 21 and the rubber pad 4. Figure 1 , Figure 2 and Figure 7 As shown, the rubber pad 4 can be made of silicon rubber with a temperature resistance grade ≥200℃, which can withstand the instantaneous high temperature in the welding process of the aluminum alloy liquid cooling plate 100. The rubber pad 4 can be connected to the clamping surface (the side surface used to contact the aluminum alloy liquid cooling plate 100) of the clamping plate 33 in a hot pressing manner. The rubber pad 4 is rectangular, and the four sides of the rubber pad 4 extend to the periphery of the aluminum alloy liquid cooling plate 100, so that the rubber pad 4 is larger than the aluminum alloy liquid cooling plate 100 of various sizes to be welded. Since the cooling flow channel 120 is integrally formed in the aluminum alloy liquid cooling plate 100 and protrudes from the surface of the aluminum alloy liquid cooling plate 100, the rubber pad 4 can adapt to the protruding cooling flow channel 120 by its elasticity, so that the clamping plate 33 does not contact the protruding cooling flow channel 120, thereby avoiding damage to the cooling flow channel 120.

[0028] Optionally, the clamping plate 33 is further provided with a heat dissipation mechanism 5, which includes an inlet total flow channel 51, an outlet total flow channel 52 and liquid cooling branch flow channels 53 integrally formed in the clamping plate 33. The inlet total flow channel 51 is close to the upper edge of the clamping plate 33, the outlet total flow channel 52 is close to the lower edge of the clamping plate 33, and the liquid cooling branch flow channels 53 are equidistantly arranged between the inlet total flow channel 51 and the outlet total flow channel 52, and the two liquid cooling branch flow channels 53 on both sides are close to the two side edges of the clamping plate 33. The two ends of the liquid cooling branch flow channel 53 are respectively communicated with the inlet total flow channel 51 and the outlet total flow channel 52.

[0029] In this optional embodiment, in combination with Figure 5 As shown in Figure 6 As shown in the figure, by introducing cooling liquid into the liquid inlet main channel 51, the cooling liquid enters each liquid cooling branch channel 53, thereby fully cooling the clamping plate 33, and taking away the temperature of the rubber pad 4, thereby improving the service life of the rubber pad 4. Since the temperature of the heat generated by welding decreases from top to bottom, that is, the temperature on the rubber pad 4 decreases from top to bottom. By making the cooling liquid first enter the liquid inlet main channel 51 and flow from top to bottom in the liquid cooling branch channel 53, the utilization effect of the cooling liquid is improved. By cooling the rubber pad 4, the service life of the rubber pad 4 is prolonged, and the aluminum alloy liquid cooling plate 100 can be continuously cooled during the welding process. It is convenient to manually unload the aluminum alloy liquid cooling plate 100 after welding is completed, and provides a prerequisite for subsequent processing steps.

[0030] Further, the heat dissipation mechanism 5 further comprises an opening and closing assembly 54. Each liquid cooling branch channel 53 is provided with an opening and closing assembly 54 at the communication position with the liquid inlet main channel 51. When the opening and closing assembly 54 is pressed, the opening and closing assembly 54 is used to make the corresponding liquid cooling branch channel 53 communicate with the liquid inlet main channel 51.

[0031] In this optional embodiment, in combination with Figure 5 , Figure 6 As shown in Figure 7 As shown in the figure, for a narrower aluminum alloy liquid cooling plate 100, the aluminum alloy liquid cooling plate 100 exerts pressure on the opening and closing assembly 54, and the opening and closing assembly 54 makes the corresponding liquid cooling branch channel 53 communicate with the liquid inlet main channel 51, that is, the Figure 5 cooling liquid flows in the plurality of liquid cooling branch channels 53 in the covered area of the aluminum alloy liquid cooling plate 100, while the plurality of liquid cooling branch channels 53 in the remaining area have no cooling liquid flowing therein, thereby realizing on-demand cooling. That is, cooling liquid is introduced only into the liquid cooling branch channels 53 covered by the aluminum alloy liquid cooling plate 100, and cooling energy is accurately delivered to the high-heat-density area, thereby avoiding energy waste caused by ineffective heat dissipation.

[0032] Optionally, the opening and closing assembly 54 comprises a rubber ball 541, a pressing rod 544, and a lower liquid passage 545. One end of the pressing rod 544 is connected to the rubber pad 4, and the other end of the pressing rod 544 penetrates into the liquid inlet main channel 51 and is connected to the rubber ball 541. The communication position of the liquid cooling branch channel 53 with the liquid inlet main channel 51 is provided with an arc-shaped groove. When the pressing rod 544 is in an initial state, the rubber ball 541 is located in the arc-shaped groove. When the pressing rod 544 pushes the rubber ball 541, the lower liquid passage 545 is formed between the rubber ball 541 and the arc-shaped groove.

[0033] In this optional embodiment, in combination with Figure 8 , Figure 9 As shown in Figure 10As shown, for the part of the aluminum alloy liquid cooling plate 100 that is not pressed by the rubber pad 4, the pressing rod 544 is in the initial position, and the rubber ball 541 just blocks the arc-shaped groove, avoiding the cooling liquid in the liquid inlet main flow channel 51 from entering the liquid cooling branch flow channel 53. For the part of the aluminum alloy liquid cooling plate 100 that is not pressed by the rubber pad 4, the pressing rod 544 pushes the rubber ball 541 away from the arc-shaped groove, so that a liquid inlet passage 545 is formed between the rubber ball 541 and the arc-shaped groove, thereby allowing the cooling liquid in the liquid inlet main flow channel 51 to enter the liquid cooling branch flow channel 53, and realizing on-demand cooling.

[0034] Optionally, the opening and closing assembly 54 further comprises a floating ball 542 and a rubber 543. The rubber ball 541 is hollow, and a plurality of liquid holes 5412 are arranged on the circumferential surface of the rubber ball 541. The floating ball 542 is arranged in the rubber ball 542. The rubber 543 is connected to the inner circumferential surface of the rubber ball 541, and forms a negative pressure cavity with the inner circumferential surface of the rubber ball 541. The floating ball 542 is connected to the rubber 543. The circumferential surface of the rubber ball 541 is further provided with an adsorption hole 5411, one end of which faces the liquid inlet passage 545, and the other end of which communicates with the negative pressure cavity.

[0035] In this optional embodiment, the rubber ball 541, the floating ball 542 and the rubber 543 can all be made of high-temperature-resistant silicone rubber. Figure 8 The rubber ball 541, the floating ball 542 and the rubber 543 can all be made of high-temperature-resistant silicone rubber. Figure 9 When the liquid inlet main flow channel 51 is filled with cooling liquid, the cooling liquid will enter the rubber ball 541 through the liquid holes 5412. The density of the floating ball 542 is less than that of water, so that the floating ball 542 floats up and pulls the rubber 543, so that the volume of the negative pressure cavity tends to increase. At this time, the adsorption hole 5411 is tightly attached to the arc-shaped groove, so that the adsorption hole 5411 generates adsorption force on the surface of the arc-shaped groove, and the rubber ball 541 is more tightly attached to the arc-shaped groove, thereby improving the sealing performance and avoiding the cooling liquid in the liquid inlet main flow channel 51 from flowing into the liquid cooling branch flow channel 53. Figure 10 As shown, for the part of the aluminum alloy liquid cooling plate 100 that is not pressed by the rubber pad 4, the pressing rod 544 is in the initial position, and the rubber ball 541 just blocks the arc-shaped groove, avoiding the cooling liquid in the liquid inlet main flow channel 51 from entering the liquid cooling branch flow channel 53. For the part of the aluminum alloy liquid cooling plate 100 that is not pressed by the rubber pad 4, the pressing rod 544 pushes the rubber ball 541 away from the arc-shaped groove, so that a liquid inlet passage 545 is formed between the rubber ball 541 and the arc-shaped groove, thereby allowing the cooling liquid in the liquid inlet main flow channel 51 to enter the liquid cooling branch flow channel 53, and realizing on-demand cooling.

[0036] In summary, the friction stir welding working environment of the aluminum alloy liquid cooling plate 100 is often accompanied by high temperature (up to 200℃ or more during welding) and cooling liquid chemical corrosion. The opening and closing assembly 54 designed in the scheme is triggered completely by the physical pressure of the aluminum alloy liquid cooling plate 100 through a mechanical opening and closing mode, without the need for power supply or control signal, avoiding the risks of circuit failure, electromagnetic interference (EMI) or power failure, and can operate with zero power consumption, and has the characteristics of low cost and high reliability.

[0037] Optionally, the welding surface expanding mechanism 2 further comprises a distance adjusting bolt 23, the distance adjusting bolt 23 is threadedly connected to the top of the clamping plate 33, and the end of the distance adjusting bolt 23 is provided with a ball head, and the inclined top strip 22 is internally provided with a ball groove for movably connecting the ball head.

[0038] In the optional embodiment, the transverse position of the inclined top strip 22 in the groove 331 is adjusted by rotating the distance adjusting bolt 23, so as to achieve the purpose of adjusting the height of the stop strip 21.

[0039] Optionally, the aluminum alloy liquid cooling plate friction stir welding clamp further comprises two supporting plates 6 and four sliding seats 7, the two supporting plates 6 are connected to the bottom sides of the opposite faces of the two clamping plates 33, the four sliding seats 7 are respectively connected to the top and bottom of the support 1, and the top and bottom of the clamping plate 33 are respectively slidably connected to the corresponding sliding seats 7.

[0040] In the optional embodiment, the two supporting plates 6 are connected to the bottom sides of the opposite faces of the two clamping plates 33, and the four sliding seats 7 are respectively connected to the top and bottom of the support 1, and the top and bottom of the clamping plate 33 are respectively slidably connected to the corresponding sliding seats 7. Figure 1 As shown in FIG. 6, when the two clamping plates 33 are close to each other, the opposite faces of the two supporting plates 6 can abut together, so that the bottom surface of the aluminum alloy liquid cooling plate 100 can be placed on the upper surfaces of the two supporting plates 6, and then the aluminum alloy liquid cooling plate 100 is lifted up. In other optional embodiments, a containing groove for slidably connecting the supporting plate 6 can be formed on the bottom side of the opposite faces of the two clamping plates 33, and a plurality of compression springs are arranged in the containing groove, and the two ends of the compression spring are respectively abutted on the supporting plate 6 and the side face of the containing groove. Thus, when the two clamping plates 33 are close to each other, after the opposite faces of the two supporting plates 6 abut together, the supporting plate 6 is retracted into the corresponding containing groove and compresses the compression spring, until the two clamping plates 33 are close to the distance at which the aluminum alloy liquid cooling plate 100 can be clamped. That is, the greater the thickness of the aluminum alloy liquid cooling plate 100, the greater the distance between the two clamping plates 33, and the smaller the distance of the two supporting plates 6 retracted into the corresponding containing groove, so that the part of the upper surfaces of the two supporting plates 6 for lifting the bottom surface of the aluminum alloy liquid cooling plate 100 is larger. Conversely, the smaller the thickness of the aluminum alloy liquid cooling plate 100, the smaller the distance between the two clamping plates 33, and the greater the distance of the two supporting plates 6 retracted into the corresponding containing groove, so that the part of the upper surfaces of the two supporting plates 6 for lifting the bottom surface of the aluminum alloy liquid cooling plate 100 is smaller. Thus, the part of the two supporting plates 6 for lifting the bottom surface of the aluminum alloy liquid cooling plate 100 can be adaptively adjusted according to the thickness of the aluminum alloy liquid cooling plate 100 to be clamped, thereby improving the practicability. Figure 1As shown, the sliding seat 7 can be fixed on the support 1 by bolt connection or welding, and the sliding seat 7 is provided with a sliding groove for the top surface and the bottom surface of the clamping plate 33 to slide, so that the upper surface and the lower surface of the clamping plate 33 are respectively slidably connected on the corresponding two sliding seats 7, so that the clamping plate 33 plays a limiting and guiding role when sliding transversely, thereby improving the clamping precision of the clamping plate 33 on the aluminum alloy liquid cooling plate 100.

[0041] The embodiment of the present application also provides an aluminum alloy liquid cooling plate friction stir welding method, which adopts the aluminum alloy liquid cooling plate friction stir welding clamp, and comprises the following steps: S1: fixing the support 1 on the platform of a friction stir welding device; S2: placing the aluminum alloy liquid cooling plate 100 between the two clamping plates 33, and clamping the aluminum alloy liquid cooling plate 100 by driving the two clamping plates 33 to move synchronously and oppositely through the driving assembly 31; S3: adjusting the height of the blocking strip 21, so that the upper surface of the blocking strip 21 is at the same horizontal plane as the top surface of the aluminum alloy liquid cooling plate 100.

[0042] Although the present application is disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications will all fall within the protection scope of the present application.

Claims

1. An aluminum alloy liquid-cooled plate friction stir welding fixture, characterized by, The utility model relates to a friction stir welding device platform fixing support, and belongs to the field of friction stir welding equipment. The utility model discloses a friction stir welding device platform fixing support, which comprises a support (1) for being fixed on a friction stir welding device platform, a clamping mechanism (3) and a welding surface expanding mechanism (2). The welding surface expanding mechanism (2) further comprises a slanting top strip (22), the top strip (21) has a horizontal surface at the top, a short vertical surface at one side, a long vertical surface at the other side and a slanting surface at the bottom, the upper surface of the slanting top strip (22) is in sliding contact with the slanting surface at the bottom of the top strip (21), and the slanting top strip (22) is used for sliding in the groove (331) to lift or lower the top strip (21). The opposite surfaces of the two clamping plates (33) are provided with rubber pads (4).

2. The aluminum alloy liquid-cooled plate friction stir welding fixture of claim 1, wherein, The clamping plate (33) is further provided with a heat dissipation mechanism (5), the heat dissipation mechanism (5) comprises a liquid inlet main flow channel (51), a liquid outlet main flow channel (52) and liquid cooling branch flow channels (53) which are integrally formed in the clamping plate (33), the liquid inlet main flow channel (51) is close to the upper edge of the clamping plate (33), the liquid outlet main flow channel (52) is close to the lower edge of the clamping plate (33), a plurality of liquid cooling branch flow channels (53) are equidistantly arranged between the liquid inlet main flow channel (51) and the liquid outlet main flow channel (52), and the two liquid cooling branch flow channels (53) on the two sides are close to the two side edges of the clamping plate (33), respectively, and the two ends of the liquid cooling branch flow channel (53) are communicated with the liquid inlet main flow channel (51) and the liquid outlet main flow channel (52), respectively.

3. The aluminum alloy liquid-cooled plate friction stir welding fixture of claim 1, wherein, The heat dissipation mechanism (5) further comprises an opening and closing assembly (54), one opening and closing assembly (54) is arranged at the communication position of each liquid cooling branch flow channel (53) and the liquid inlet main flow channel (51), and when the opening and closing assembly (54) is pressed, the opening and closing assembly (54) is used for enabling the corresponding liquid cooling branch flow channel (53) to be communicated with the liquid inlet main flow channel (51).

4. The aluminum alloy liquid-cooled plate friction stir welding fixture of claim 3, wherein, The opening and closing assembly (54) comprises a rubber ball (541), a pressing rod (544) and a liquid passage (545), one end of the pressing rod (544) is connected in the rubber pad (4), the other end of the pressing rod (544) penetrates into the liquid inlet main flow channel (51) and is connected with the rubber ball (541), the communication position of the liquid cooling branch flow channel (53) and the liquid inlet main flow channel (51) is provided with an arc-shaped groove, when the pressing rod (544) is in an initial state, the rubber ball (541) is located in the arc-shaped groove, when the pressing rod (544) pushes the rubber ball (541), the liquid passage (545) is formed between the rubber ball (541) and the arc-shaped groove.

5. The aluminum alloy liquid-cooled plate friction stir welding fixture of claim 4, wherein, ​ 6. The aluminum alloy liquid-cooled plate friction stir welding fixture of claim 5, wherein, ​ 7. The aluminum alloy liquid-cooled plate friction stir welding fixture of claim 6, wherein, The opening and closing assembly (54) further comprises a rubber ball (541) and a rubber skin (543), the rubber ball (541) is a hollow structure, a plurality of liquid holes (5412) are arranged on the peripheral surface of the rubber ball (541), the floating ball (542) is arranged in the rubber ball (542), the rubber skin (543) is connected to the inner peripheral surface of the rubber ball (541), the rubber skin (543) and the inner peripheral surface of the rubber ball (541) form a negative pressure cavity, the floating ball (542) is connected to the rubber skin (543), the peripheral surface of the rubber ball (541) is further provided with a suction hole (5411), one end of the suction hole (5411) faces the lower liquid passage (545), and the other end of the suction hole (5411) is in communication with the negative pressure cavity.

8. The aluminum alloy liquid-cooled plate friction stir welding fixture of claim 2, wherein, The welding surface expanding mechanism (2) further comprises a distance adjusting bolt (23), the distance adjusting bolt (23) is threadedly connected to the top of the clamping plate (33), the end of the distance adjusting bolt (23) is provided with a ball head, and the inclined top strip (22) is internally provided with a ball groove for movably connecting the ball head.

9. The aluminum alloy liquid-cooled plate friction stir welding fixture of claim 1, wherein, The aluminum alloy liquid cooling plate friction stir welding clamp further comprises two supporting plates 6 and four sliding seats 7, the two supporting plates 6 are connected to the bottom sides of the opposite faces of the two clamping plates 33, the four sliding seats 7 are respectively connected to the top and bottom of the support 1, and the top and bottom of the clamping plate 33 are respectively slidably connected to the corresponding sliding seats 7.

10. A method of friction stir welding of an aluminum alloy liquid cold plate, characterized by, The aluminum alloy liquid cooling plate friction stir welding clamp comprises the following steps: S1: fixing the support (1) on the friction stir welding equipment platform; S2: placing the aluminum alloy liquid cooling plate (100) between the two clamping plates (33), driving the two clamping plates (33) to move synchronously and approach each other by the driving assembly (31), and clamping the aluminum alloy liquid cooling plate (100); S3: adjusting the height of the stop bar (21) so that the upper surface of the stop bar (21) is at the same level as the top surface of the aluminum alloy liquid cooling plate (100).

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