Stir friction welding structure deformation control device and use method thereof

Abstract

The present application relates to a friction stir welding structure deformation control device and a method for using the device, comprising a connection block arranged on a welding head, a first cylinder electrically connected to a control system arranged on the connection block, a pressure arm connected to the piston rod of the first cylinder, a pressure wheel rotatably arranged on the pressure arm for pressing the edge of a bottom plate, the pressure wheel being close to the welding part of the welding head; the control system starts the first cylinder, the piston rod of the first cylinder extends, and the pressure wheel is pressed against the edge of the bottom plate; during the process of the welding head moving to realize welding, the pressure wheel is driven to roll along the edge of the bottom plate; when the welding head changes the welding direction, the pressure wheel also changes the rolling direction accordingly. The present application has the advantage of improving welding quality.

Description

Technical Field

[0001] The present application relates to the field of welding tooling, and in particular to a stir friction welding structure deformation control device and a method of using the same. Background Art

[0002] Friction stir welding is a new type of solid-phase joining technology, suitable for welding low-melting-point alloys. Its principle is to use a high-speed rotating stirring head to insert into the joint, and use the strong friction and stirring effect of the stirring head to make the welding joint area in a thermoplastic state and be broken and mixed, and then connected together under a certain pressure. The stirring head rotates and squeezes at high speed in the welding direction, and a weld is formed behind the stirring head, thus completing the solid-state connection.

[0003] The related technology discloses a battery tray for new energy vehicles, including a left crossbeam, a right crossbeam, a front crossbeam and a rear crossbeam distributed in a rectangular shape, and the four crossbeams are welded together with a bottom plate by stir friction welding.

[0004] Since the thickness of the bottom plate is relatively thin and the welding temperature is relatively high, when the welding head welds the bottom plate to the four beams, the edge of the bottom plate is easily deformed and warped due to the high temperature, resulting in poor welding quality and obvious shortcomings. Summary of the invention

[0005] In order to improve welding quality, the present application provides a stir friction welding structure deformation control device and a method of using the same.

[0006] In the first aspect, the present application provides a friction stir welding structure deformation control device, which adopts the following technical solution:

[0007] A friction stir welding structure deformation control device includes a connecting block arranged on a welding head, a first cylinder electrically connected to a control system is arranged on the connecting block, a piston rod of the first cylinder is connected to an extension arm, a pressure wheel for pressing the edge of a base plate is rotatably arranged on the extension arm, and the pressure wheel is close to the welding point of the welding head.

[0008] By adopting the above technical solution, before welding begins, the piston rod of the first cylinder is extended, so that the extension arm drives the pressure wheel to press tightly on the edge of the bottom plate. During welding, the welding head drives the pressure wheel to roll along the welding direction, and the pressure wheel has a rolling effect on the edge of the bottom plate, thereby limiting the deformation of the bottom plate edge caused by high temperature, which is conducive to improving the welding quality.

[0009] Optionally, a sliding seat is further provided on the connecting block, a sliding block is slidably fitted in the sliding seat, and the piston rod and the pressure arm of the first cylinder are both connected to the sliding block.

[0010] By adopting the above technical solution, the sliding block and the sliding seat are slidably matched, thereby guiding the lifting and lowering movement of the pressure wheel.

[0011] Optionally, a plurality of edge clamps are circumferentially arranged around the placement position of the battery tray, and the edge clamps include a pressure plate cylinder electrically connected to a control system, and a movable end of the pressure plate cylinder is connected to a pressure arm that is pressed tightly against the edge of the bottom plate.

[0012] By adopting the above technical solution, the control system starts the pressure plate cylinder, and the movable end of the pressure plate cylinder rotates, thereby driving the pressure arm to rotate and press against the edge of the bottom plate. During the welding process of the welding head along the weld, each pressure arm is lifted in turn, and after the welding head moves over, the pressure arm presses against the edge of the bottom plate again.

[0013] Optionally, a mounting base is provided on the other side of the welding head relative to the connecting block, a scraper is provided below the mounting base, and a second cylinder is also provided on the mounting base. The second cylinder is electrically connected to the control system and is used to drive the scraper to move up and down. The scraper is inclined toward the pressure wheel from top to bottom, and the lowest point of the scraper is used to press against the weld.

[0014] By adopting the above technical solution, during the movement of the welding head, the scraper is driven by the mounting seat to move along the weld, so as to remove the flash on the side of the weld.

[0015] Optionally, a reinforcing guide bar is vertically slidably provided on the mounting seat, the piston rod of the second cylinder and the blade are both connected to the reinforcing guide bar, the blade is also provided with a screw rod that slides through the reinforcing guide bar, and the screw rod is threadedly connected with a reinforcing nut that is tightened against the side of the reinforcing guide bar facing away from the blade.

[0016] By adopting the above technical solution, when the piston rod of the second cylinder is extended, the worker observes whether the lowest part of the blade is pressed against the bottom plate. If there is a gap, the worker rotates the reinforcing screw rod, thereby applying a certain pulling force to the blade through the screw rod to ensure that the lowest part of the blade is pressed against the bottom plate during the welding process.

[0017] Optionally, a dustpan-shaped feed port is provided at the bottom of the shovel, a feed trough is provided inside the shovel along its inclination direction, a storage box with a hollow interior is provided on the mounting seat, a hose is connected between the storage box and the feed trough, an air pump is provided on the mounting seat, the air pump is communicated with the storage box and is electrically connected to the control system, the connection point between the hose and the storage box is lower than the connection point between the air pump and the storage box, and a blocking net is provided between them.

[0018] By adopting the above technical solution, when welding starts, the control system starts the vacuum pump, and the vacuum pump sucks the waste chips shoveled off by the shovel into the storage box through the feed trough, feed port and hose, and the blocking net can reduce the possibility of the waste chips being directly sucked out of the storage box by the vacuum pump.

[0019] Optionally, an elastic film is provided at the bottom of the material storage box, the edge of the elastic film is bonded to the edge of the bottom of the material storage box, a hole is opened at the center of the elastic film and a magnetic ring for magnetic attraction with the material storage box is provided at the opening, and a plurality of discharge holes are opened between the bottom edge of the material storage box and the magnetic ring.

[0020] By adopting the above technical solution, after welding is completed, the worker places a receiving box under the magnetic ring, and then manually pulls the magnetic ring downward, and the elastic membrane is pulled and deformed into a funnel shape, so that the waste chips in the storage box fall into the receiving box through various discharge holes, thereby realizing the rapid removal of waste chips in the storage box.

[0021] In a second aspect, the present application provides a method for using a stir friction welding structure deformation control device, which adopts the following technical solution:

[0022] A method for using a friction stir welding structure deformation control device comprises the following steps:

[0023] S1. The control system starts the first cylinder, the piston rod of the first cylinder extends, and the pressing wheel is pressed tightly against the edge of the bottom plate;

[0024] S2. During the welding process, the welding head moves to drive the pressure wheel to roll along the edge of the bottom plate; when the welding head changes the welding direction, the pressure wheel also changes the rolling direction accordingly.

[0025] By adopting the above technical solution, during welding, the welding head drives the pressure wheel to roll along the welding direction, and the pressure wheel has a rolling effect on the edge of the base plate, thereby limiting the deformation of the edge of the base plate caused by high temperature, which is beneficial to improving the welding quality.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. During welding, the welding head drives the pressure wheel to roll along the welding direction, and the pressure wheel rolls the edge of the bottom plate, thereby limiting the deformation of the edge of the bottom plate caused by high temperature, which is beneficial to improving the welding quality;

[0028] 2. After the piston rod of the second cylinder is extended, the worker observes whether the lowest part of the blade is pressed against the bottom plate. If there is a gap, the worker turns the reinforcing screw rod, thereby applying a certain pulling force to the blade through the screw rod to ensure that the lowest part of the blade is pressed against the bottom plate during the welding process;

[0029] 3. After welding, the worker places a receiving box under the magnetic ring, and then manually pulls the magnetic ring downward. The elastic membrane is pulled and deformed into a funnel shape, so that the waste chips in the storage box fall into the receiving box through various discharge holes, thereby realizing the rapid removal of waste chips in the storage box. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural diagram of Example 1 of the present application.

[0031] Figure 2 It is a structural schematic diagram of the positional relationship between the connecting block, the first cylinder and the slide seat in Example 1 of the present application.

[0032] Figure 3 It is a structural diagram of Example 2 of the present application.

[0033] Figure 4 It is a schematic diagram of the positional relationship between the material storage box, welding head and pressure wheel in Example 2 of the present application.

[0034] Figure 5 It is a cross-sectional view of the positional relationship between the storage box, the hose and the scraper in Example 2 of the present application.

[0035] Explanation of the reference numerals in the accompanying drawings: 1. welding head; 2. base plate; 3. connecting block; 4. first cylinder; 5. extension arm; 6. pressure wheel; 7. slide seat; 8. slide block; 9. edge pressing piece; 91. pressure plate cylinder; 92. pressure arm; 10. mounting seat; 11. scraper; 110. feed port; 111. feed trough; 12. second cylinder; 13. reinforcement guide bar; 14. screw; 15. reinforcement nut; 16. storage box; 161. discharge hole; 17. hose; 18. vacuum pump; 19. screen; 20. elastic membrane; 21. magnetic ring. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-3 This application is described in further detail.

[0037] The embodiments of the present application disclose a friction stir welding structure deformation control device and a method of using the same.

[0038] Example 1

[0039] Reference Figure 1 and Figure 2 The deformation control device of the friction stir welding structure includes a connecting block 3 bolted to the welding head 1, a first cylinder 4 electrically connected to the control system is bolted above the connecting block 3, a sliding seat 7 is bolted below the connecting block 3, a sliding block 8 is slidably fitted in the sliding seat 7, and a piston rod of the first cylinder 4 is threadedly connected to the sliding block 8.

[0040] Reference Figure 1 and Figure 2 An extension arm 5 is bolted to the bottom of the slider 8 , and a pressure wheel 6 for pressing the edge of the bottom plate 2 is rotatably provided on the extension arm 5 , and the pressure wheel 6 is close to the welding position of the welding head 1 .

[0041] Before welding begins, the piston rod of the first cylinder 4 extends, and the slider 8 drives the extension arm 5 to move downward. The extension arm 5 drives the pressure wheel 6 to approach the welding position of the welding head 1 and press against the edge of the bottom plate 2.

[0042] During the welding process, the welding head 1 drives the pressure wheel 6 to move along the weld. When the pressure wheel 6 is always pressed against the bottom plate 2 , the pressure wheel 6 rolls on the bottom plate 2 along the weld.

[0043] Since the pressure wheel 6 is close to the welding point of the welding head 1, even if the position of the bottom plate 2 close to the welding point is subjected to high temperature, it is difficult to cause deformation such as warping due to the restriction of the pressure wheel 6, which is beneficial to improving the welding quality.

[0044] Reference Figure 1 and Figure 2 In addition, a plurality of edge clamping members 9 are arranged circumferentially around the placement position of the battery tray, and each edge clamping member 9 includes a pressure plate cylinder 91 electrically connected to the control system, and the movable end of the pressure plate cylinder 91 is fixedly connected to a pressure arm 92 for clamping the edge of the bottom plate 2.

[0045] Reference Figure 1 and Figure 2 Before welding begins, the control system starts the pressing plate cylinder 91, so that the movable end of the pressing plate cylinder 91 drives the pressing arm 92 to rotate, so that the pressing arm 92 is pressed tightly against the edge of the bottom plate 2.

[0046] During the movement of the welding head 1 , the plurality of pressing arms 92 are lifted up in sequence, and after the welding head 1 moves from the corresponding position, the pressing arms 92 press the bottom plate 2 again.

[0047] A plurality of edge clamps 9 cooperate to clamp the edges of the bottom plate 2 , thereby further reducing the possibility of deformation and warping of the edges of the bottom plate 2 due to high temperature.

[0048] The implementation principle of Example 1 is as follows: the control system starts the first cylinder 4 , the piston rod of the first cylinder 4 extends downward, and the pressure wheel 6 is pressed against the bottom plate 2 .

[0049] The welding head 1 drives the pressure wheel 6 to move along the weld, and the pressure wheel 6 rolls on the base plate 2. When the welding head 1 changes the welding direction, the pressure wheel 6 also changes the rolling direction accordingly. During the welding process, each pressure arm 92 is lifted up in turn, and after the welding head 1 moves from the corresponding position, each pressure arm 92 is pressed against the base plate 2 again.

[0050] The method for using the friction stir welding structure deformation control device in Example 1 comprises the following steps:

[0051] S1, the control system starts the first cylinder 4, the piston rod of the first cylinder 4 extends, and the pressing wheel 6 presses tightly against the edge of the bottom plate 2;

[0052] S2. During the process of the welding head 1 moving to realize welding, the pressure wheel 6 is driven to roll along the edge of the bottom plate 2; when the welding head 1 changes the welding direction, the pressure wheel 6 also changes the rolling direction accordingly; during the welding process, each pressure arm 92 is lifted up in turn, and after the welding head 1 moves from the corresponding position, each pressure arm 92 is pressed against the bottom plate 2 again.

[0053] Example 2

[0054] Reference Figure 3 , Figure 4 and Figure 5 The difference between this embodiment and embodiment 1 is that a mounting seat 10 is bolted to the other side of the welding head 1 relative to the connecting block 3, a reinforcing guide bar 13 is vertically slidably penetrated through the mounting seat 10, a second cylinder 12 electrically connected to the control system is bolted to the top of the mounting seat 10, and a piston rod of the second cylinder 12 passes through the mounting seat 10 and is threadedly connected to the reinforcing guide bar 13.

[0055] Reference Figure 3 , Figure 4 and Figure 5 A scraper 11 is bolted to the reinforcing guide bar 13 , and the scraper 11 is located below the mounting seat 10 . The scraper 11 is tilted toward the pressure wheel 6 from top to bottom, and the lowest point of the scraper 11 is used to press against the weld.

[0056] Refer to 3. Figure 4 and Figure 5 Before welding, the control system controls the piston rod of the second cylinder 12 to extend downward, so that the reinforcing guide bar 13 drives the scraper 11 to move downward, and the lowest edge of the scraper 11 is pressed against the bottom plate 2. When the welding head 1 drives the scraper 11 to move along the weld, the scraper 11 scrapes off the flash at the weld.

[0057] Reference Figure 3 , Figure 4 and Figure 5 The blade 11 is also fixedly connected with a screw rod 14 that slides through the reinforcing guide bar 13 . The screw rod 14 is horizontally arranged, and a reinforcing nut 15 is threadedly connected to the screw rod 14 . The reinforcing nut 15 is pressed against the side of the reinforcing guide bar 13 facing away from the blade 11 .

[0058] Reference Figure 1 , Figure 2 and Figure 3 When the piston rod of the second cylinder 12 extends downward, a certain gap may be left between the lowest point of the blade 11 and the base plate 2. At this time, the worker rotates the reinforcing nut 15 with the help of a tool, thereby applying a certain pulling force to the blade 11 through the screw rod 14.

[0059] Although the scraper 11 is made of metal, it can be slightly deformed under the pulling force applied by the screw 14, thereby eliminating the gap between the lowest point of the scraper 11 and the bottom plate 2, so that the lowest point of the scraper 11 can be pressed against the bottom plate 2, thereby improving the effect of removing the flash.

[0060] Reference Figure 3 , Figure 4 and Figure 5 In order to prevent the scraped burrs from scattering on the bottom plate 2, a dustpan-shaped feed port 110 is provided at the bottom of the scraper 11, and a feed trough 111 is provided inside the scraper 11 along its inclined direction. A hollow storage box 16 is bolted to the mounting seat 10, and a hose 17 is connected between the storage box 16 and the feed trough 111.

[0061] Reference Figure 3 , Figure 4 and Figure 5 A vacuum pump 18 connected to the material storage box 16 and electrically connected to the control system is bolted to the mounting seat 10. The connection point between the hose 17 and the material storage box 16 is lower than the connection point between the vacuum pump 18 and the material storage box 16, and a blocking net 19 is arranged between them. The blocking net 19 is fixedly connected to the material storage box 16.

[0062] Reference Figure 3 , Figure 4 and Figure 5 Under the action of the vacuum pump 18, the scraps shoveled by the blade 11 are sucked into the storage box 16 through the feed port 110, the feed trough 111 and the hose 17. The screen 19 is used to reduce the suction of the vacuum pump 18, thereby directly sucking the scraps out of the storage box 16.

[0063] Reference Figure 3 , Figure 4 and Figure 5 An elastic membrane 20 is arranged at the bottom of the storage box 16, and the edge of the elastic membrane 20 is bonded to the edge of the bottom of the storage box 16. A hole is opened at the center of the elastic membrane 20 and a magnetic ring 21 for magnetic attraction with the storage box 16 is bonded at the opening. A plurality of discharge holes 161 are opened between the bottom edge of the storage box 16 and the magnetic ring 21, and the plurality of discharge holes 161 are evenly arranged around the circumference of the magnetic ring 21.

[0064] Reference Figure 3 , Figure 4 and Figure 5 After each welding is completed, the worker manually pulls down the magnetic ring 21, and the magnetic ring 21 pulls the elastic membrane 20 downward to deform and form a funnel shape, so that the waste chips accumulated in the storage box 16 leak out through the discharge hole 161 and the magnetic ring 21. The worker can place a receiving box for receiving materials under the magnetic ring 21, so that the waste chips in the storage box 16 can be easily removed without splitting or disassembling the storage box 16.

[0065] The implementation principle of Example 2 is as follows: the control system starts the first cylinder 4, the second cylinder 12 and the vacuum pump 18, the piston rods of the first cylinder 4 and the second cylinder 12 are extended downward, and the lowest points of the pressure wheel 6 and the scraper 11 are pressed against the bottom plate 2. The worker observes whether the lowest point of the scraper 11 is pressed against the bottom plate 2, and if so, welding is started directly; if not, the reinforcing nut 15 is rotated with the help of a tool, and the screw 14 applies a certain pulling force to the scraper 11, and the scraper 11 is slightly deformed and pressed against the bottom plate 2 before welding is started.

[0066] The welding head 1 drives the pressure wheel 6 and the scraper 11 to move along the weld, the pressure wheel 6 rolls on the bottom plate 2, and the scraper 11 scrapes off the waste generated by welding; when the welding head 1 changes the welding direction, the pressure wheel 6 and the scraper 11 also change the rolling direction accordingly; during the welding process, each pressure arm 92 is lifted in turn, and after the welding head 1 moves from the corresponding position, each pressure arm 92 is pressed against the bottom plate 2 again; the vacuum pump 18 draws the waste into the storage box 16 through the feed port 110, the feed trough 111 and the hose 17. After the welding is completed, the piston rods of the first cylinder 4 and the second cylinder 12 are retracted, the control system turns off the vacuum pump 18, the worker places a receiving box under the storage box 16, manually pulls the magnetic ring 21 downward, the elastic membrane 20 is stretched and deformed to a funnel shape, and the waste in the storage box 16 leaks into the receiving box through the discharge hole 161.

[0067] The method for using the friction stir welding structure deformation control device in Example 2 comprises the following steps:

[0068] S1, the control system starts the first cylinder 4, the second cylinder 12 and the vacuum pump 18, the piston rods of the first cylinder 4 and the second cylinder 12 are extended downward, and the lowest parts of the pressure wheel 6 and the scraper 11 are pressed against the bottom plate 2;

[0069] S2, the worker observes whether the lowest point of the scraper blade 11 is pressed against the bottom plate 2, and if so, welding starts directly; if not, the worker rotates the reinforcing nut 15 with the help of a tool, and the screw 14 applies a certain pulling force to the scraper blade 11, and the scraper blade 11 is slightly deformed and pressed against the bottom plate 2 before welding starts;

[0070] S3, the welding head 1 drives the pressure wheel 6 and the scraper 11 to move along the weld, the pressure wheel 6 rolls on the bottom plate 2, and the scraper 11 scrapes off the waste chips generated by welding; when the welding head 1 changes the welding direction, the pressure wheel 6 and the scraper 11 also change the rolling direction accordingly; during the welding process, each pressure arm 92 is lifted up in turn, and after the welding head 1 moves from the corresponding position, each pressure arm 92 is pressed against the bottom plate 2 again; the vacuum pump 18 draws the waste chips into the storage box 16 through the feed port 110, the feed trough 111 and the hose 17.

[0071] S4. After welding is completed, the piston rods of the first cylinder 4 and the second cylinder 12 are retracted, the control system turns off the vacuum pump 18, the worker places a receiving box under the storage box 16, and manually pulls the magnetic ring 21 downward, the elastic membrane 20 is stretched and deformed into a funnel shape, and the waste chips in the storage box 16 leak out into the receiving box through the discharge hole 161.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A friction stir welding structure deformation control device, characterized in that: The invention comprises a connection block (3) arranged on a welding head (1), the connection block (3) being provided with a first cylinder (4) electrically connected to a control system, the piston rod of the first cylinder (4) being connected with an extension arm (5), the extension arm (5) being rotatably provided with a pressure wheel (6) for pressing the edge of a bottom plate (2), the pressure wheel (6) being close to a welding position of the welding head (1); A mounting seat (10) is provided on the other side of the welding head (1) relative to the connecting block (3), a scraper (11) is provided below the mounting seat (10), and a second cylinder (12) is also provided on the mounting seat (10), the second cylinder (12) is electrically connected to the control system and is used to drive the scraper (11) to move up and down, the scraper (11) is tilted from top to bottom toward the pressure wheel (6), and the lowest point of the scraper (11) is used to press against the weld; The bottom of the scraper (11) is provided with a dustpan-shaped feed port (110), and the scraper (11) is provided with a feed trough (111) along its inclined direction. The mounting seat (10) is provided with a material storage box (16) with a hollow interior, and a hose (17) is connected between the material storage box (16) and the feed trough (111). The mounting seat (10) is provided with an air pump (18) which is in communication with the material storage box (16) and is electrically connected to a control system, and the connection point between the hose (17) and the material storage box (16) is lower than the connection point between the air pump (18) and the material storage box (16), and a blocking net (19) is provided between them. An elastic film (20) is provided at the bottom of the material storage box (16), the edge of the elastic film (20) is bonded to the edge of the bottom of the material storage box (16), a hole is opened at the center of the elastic film (20), and a magnetic ring (21) for magnetic attraction with the material storage box (16) is provided at the opening, and a plurality of discharge holes (161) are opened between the bottom edge of the material storage box (16) and the magnetic ring (21).

2. The friction stir welding structure deformation control device according to claim 1, characterized in that: The connecting block (3) is also provided with a sliding seat (7), a sliding block (8) is slidably fitted inside the sliding seat (7), and the piston rod and the pressure arm (92) of the first cylinder (4) are both connected to the sliding block (8).

3. The friction stir welding structure deformation control device according to claim 1, characterized in that: A plurality of edge clamps (9) are arranged circumferentially around the placement position of the battery tray, the edge clamps (9) comprising a pressure plate cylinder (91) electrically connected to a control system, the movable end of the pressure plate cylinder (91) being connected to a pressure arm (92) for clamping the edge of the bottom plate (2).

4. The friction stir welding structure deformation control device according to claim 1, characterized in that: A reinforcing guide bar (13) is vertically slidably provided on the mounting seat (10), the piston rod of the second cylinder (12) and the scraper (11) are both connected to the reinforcing guide bar (13), the scraper (11) is also provided with a screw rod (14) that slides through the reinforcing guide bar (13), and a reinforcing nut (15) is threadedly connected to the screw rod (14) and is tightly pressed against the side of the reinforcing guide bar (13) facing away from the scraper (11).

5. A method for using the friction stir welding structure deformation control device according to any one of claims 1 to 4, characterized in that: The steps include: S1. The control system starts the first cylinder (4), the piston rod of the first cylinder (4) extends, and the pressing wheel (6) is pressed tightly against the edge of the bottom plate (2); S2. During the process of the welding head (1) moving to realize welding, the pressure wheel (6) is driven to roll along the edge of the bottom plate (2); when the welding head (1) changes the welding direction, the pressure wheel (6) also changes the rolling direction accordingly.

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