Welding device for aluminum alloy sections

Abstract

The invention discloses a welding device for aluminum alloy profiles, which belongs to the field of aluminum profile processing and comprises a base, two moving seats slidably connected to the upper end of the base and two screw driving parts connected into the base and respectively driving the two moving seats to move. One side of each moving seat is connected with an inner supporting assembly, and each inner supporting assembly comprises a column body rotationally connected to one side of the corresponding moving seat, a plurality of first inner supporting parts movably inserted into the column body, and a first driving assembly located in the column body and driving one ends of the first inner supporting parts to move towards the outside of the column body; according to the scheme, the mode that the inner supporting assembly and the outer clamping assembly are used for clamping and positioning pipe fittings at the same time is adopted, the inner supporting assembly can support the inner walls of the pipe fittings and prevent the pipe fittings from being stressed and deviated in the welding process, the outer clamping assembly clamps the pipe fittings from the outside, ports of the two pipe fittings are aligned, joint staggering is avoided, and the coaxiality of the two pipe fittings in the welding process is guaranteed; and through welding and forming are facilitated, the staggered joint amount is small, and roundness and attractiveness are achieved after welding is completed.

Description

Technical Field

[0001] This invention relates to the field of aluminum profile processing, and more specifically, to a welding apparatus for aluminum alloy profiles. Background Technology

[0002] Aluminum alloy profiles, simply put, are long strips of aluminum alloy that have a specific cross-sectional shape and size, formed by processing aluminum alloy through certain processes.

[0003] In order to improve the welding accuracy when welding cylindrical aluminum alloy profiles, the prior art (Chinese invention patent with announcement number CN118371970) discloses a welding device for aluminum alloy profiles, which clamps the aluminum alloy tube by setting a clamping mechanism.

[0004] While mechanical clamping structures can secure aluminum alloy pipe fittings and make them more stable during welding, most current clamping and positioning structures rely on either internal support or external clamping. Internal supports act within the pipe to resist shrinkage and collapse during heating, maintaining roundness; however, their constraint on the outer wall position is limited. Even when the internal supports hold the inner walls of two pipes in place, relative misalignment can still occur. External clamps can press the outer walls of the two pipes together, making them appear aligned, but ellipticity errors or uneven wall thickness at the pipe ends can lead to misalignment of the inner walls. Using only external clamps cannot guarantee coaxiality between the two pipe fittings, affecting welding accuracy and quality. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a welding device for aluminum alloy profiles.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A welding device for aluminum alloy profiles includes a base, two movable seats slidably connected to the upper end of the base, two screw drive units connected inside the base and respectively driving the two movable seats to move, and a welding assembly connected to the upper end of the base.

[0008] Each of the two movable seats is connected to an inner support assembly on one side, and the inner support assembly includes a column rotatably connected to one side of the movable seat, a plurality of inner support parts movably inserted into the inside of the column, and a drive assembly located inside the column and driving one end of the plurality of inner support parts to move outward from the column.

[0009] Both of the aforementioned movable seats are connected to an external clamping assembly on one side. The external clamping assembly includes a vertical plate fixed to one side of the movable seat, a hollow groove opened inside the vertical plate, multiple external clamping parts movably inserted into the vertical plate and with one end extending into the hollow groove, a second drive assembly located inside the vertical plate and driving one end of the multiple external clamping parts to move towards the center of the hollow groove, multiple arc-shaped clamping plates respectively fixed to one end of the multiple external clamping parts, and ball bearings rotatably connected to one side of the multiple arc-shaped clamping plates. The output shaft of the third motor is connected to the fifth gear.

[0010] Furthermore, the drive assembly includes a turntable 1 rotatably connected to the interior of the column, a gear 4 fixed to one side of the turntable 1, a motor 2 fixed to the interior of the column, a gear 3 rotatably connected to the interior of the column and meshing with the gear 4, multiple guide grooves 1 opened inside the turntable 1, and multiple rotating parts 3 respectively fixed to one side of multiple inner support parts 1 and located in the guide grooves 1. One end of the multiple inner support parts 1 extends outward from the interior of the column. The output shaft of the motor 2 is connected to the gear 3, and a heat dissipation sleeve is fitted around the outside of the motor 2.

[0011] Furthermore, the drive assembly 2 includes a gear disk 1 rotatably connected inside the upright plate and a gear 5 meshing with the gear disk 1, multiple guide grooves 2 opened inside the gear disk 1, and multiple rotating parts 4 respectively fixed to one side of multiple outer clamps and located in the guide grooves 2. A motor 3 is fixed to one side of the upright plate, and the output shaft of the motor 3 is connected to the gear 5.

[0012] Furthermore, the base is also connected to a coordinating rotation assembly that drives the two columns to rotate synchronously. The coordinating rotation assembly includes two gears 2 and two gears 1 respectively rotatably connected to one side of the two movable seats, three fixed seats fixed to the upper end of the base, and two rotating shafts whose two ends are rotatably connected to the two adjacent fixed seats. The two gears 2 are respectively fixed to the outside of the two columns, and the two gears 2 mesh with the two gears 1 respectively. One of the fixed seats is fixed to one side of a motor 1, and the output shaft of the motor 1 is fixed to one end of one of the columns. One end of the two columns is fixed.

[0013] Furthermore, the inner support portion has a movable groove inside, and a grinding block is slidably connected in the movable groove. A spring is fixed to the lower end of the grinding block, and the other end of the spring is connected to the inner wall of the movable groove.

[0014] Furthermore, each of the two movable seats is connected to a traction assembly on one side, and the traction assembly includes a bracket fixed to one side of the movable seat, a guide rod with both ends fixed to the inner wall of the bracket and one side of the movable seat respectively, a lead screw with both ends rotatably connected to the inner wall of the bracket and one side of the movable seat respectively, a movable seat movably sleeved outside the guide rod and screwed to the outside of the lead screw, a motor fixed to one side of the bracket and with its output shaft connected to the lead screw, a clearance groove opened inside the column body, a traction inner support part slidably connected in the clearance groove, and a connecting column movably inserted inside the column body, with one end of the connecting column fixed to the traction inner support part and the other end of the connecting column rotatably connected to one side of the movable seat.

[0015] Furthermore, the traction inner support includes a slide block 1 movably connected inside the clearance groove, a motor 6 fixed to one side of the slide block 1, a turntable 3 rotatably connected inside the slide block 1, a gear 2 fixed to one side of the turntable 3, a gear 6 rotatably connected inside the slide block 1 and meshing with the gear 2, multiple guide grooves 4 opened inside the turntable 3, multiple inner support parts 3 movably connected inside the slide block 1, and multiple rotating parts 2 respectively fixed to one side of the multiple inner support parts 3 and located in the guide grooves 4. The other ends of the multiple inner support parts 3 protrude from the slide block 1 and the clearance groove and extend outward.

[0016] Furthermore, one end of one of the columns is connected to a flush support assembly, which includes a base, a turntable 2 rotatably connected inside the base, an inner rotating shaft fixed to one end of the turntable 2, multiple guide grooves 3 opened inside the turntable 2, multiple inner support parts 2 movably inserted into the base, multiple rotating parts 1 respectively fixed to one side of the multiple inner support parts 2 and located in the guide grooves 3, and multiple support rollers respectively rotatably connected to one side of the multiple inner support parts 2. One end of the multiple inner support parts 2 extends outward from the base; a connecting shaft is fixed to one end of the base, and the other end of the connecting shaft passes through the column, the inner support assembly, the traction inner support part, the connecting column, the movable base, and is fixed to the inner wall of the bracket 1. The inner rotating shaft is rotatably connected inside the connecting shaft. A motor 4 is fixed to one side of the bracket, and the output shaft of the motor 4 is connected to the inner rotating shaft.

[0017] Furthermore, a turntable five is rotatably connected to one side of the base, and multiple slots are provided on one side of the turntable five. Multiple inserts for inserting into the slots are fixed to one end of another column.

[0018] Furthermore, a welding assembly is connected to the base, and the welding assembly includes a frame fixed to the base, a cylinder fixed to the upper end of the frame, a lifting seat slidably connected to the inner wall of the frame and fixed to the telescopic end of the cylinder, two turntables four rotatably connected to both sides of the lifting seat and rotating synchronously, a motor seven fixed to one side of the lifting seat for driving the two turntables four to rotate, two slides two slidably connected to one side of the two turntables four, two screw adjustment parts connected to one side of the two turntables four for driving the slides two to move, a bracket two fixed to one side of the slides two, a grinding roller rotatably connected inside the bracket two, a motor eight fixed to one side of the slides two and driving the grinding roller to rotate, and a welding part fixed to the lower end of the lifting seat.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) This solution uses an internal support component and an external clamping component to clamp and position the pipe fittings simultaneously. The internal support can support the inner wall of the pipe and prevent the pipe from shifting under stress during welding. The external clamping clamps from the outside to align the ends of the two pipes, avoid misalignment, and ensure the coaxiality of the two pipe fittings during the welding process. At the same time, the internal support is equivalent to a mold core, which can offset the shrinkage caused by welding thermal stress and maintain roundness. The external clamping can limit the expansion or misalignment of the outer wall, avoid local burn-out, and prevent deformation at the welded end of the pipe fitting. The combination of the two can make the weld gap more uniform, which is conducive to penetration and forming. The amount of misalignment is small, and the weld is round and beautiful after completion.

[0021] (2) This scheme is equipped with a flush support assembly. Multiple internal support parts can move to make multiple support rollers contact the inner wall of the weld joint of the two pipes, positioning the inside of the weld joint of the two pipes, forcing the inner wall of the joint of the two pipes to align, reducing misalignment, and maintaining the coaxiality of the pipes; at the same time, during welding heating, local shrinkage force will appear near the joint, and the support rollers form point support in this area, which can resist part of the shrinkage force and reduce the collapse or elliptical deformation of the pipe opening.

[0022] (3) This solution sets up grinding blocks, springs and other structures inside the inner support. When the pipe fitting is sleeved on the outside of the column, the inner support is controlled to move towards the inner wall of the pipe and the grinding block can contact the inner wall of the pipe. When the pipe fitting is moved outside the column, the grinding block can grind the inner wall of the pipe fitting, improve the flatness of the inner wall surface of the pipe fitting, make the fit between the inner support and the pipe wall more uniform, and make the positioning effect more reliable, which helps to ensure the coaxiality and stability of the pipe during welding. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of gear one, gear two, and the clearance groove of the present invention;

[0025] Figure 3 This is a schematic diagram of the second driving component of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal support component structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the four structures of the present invention: traction component, base, connecting shaft, and motor.

[0028] Figure 6 This is a schematic diagram of the traction inner support structure of the present invention;

[0029] Figure 7 This is a cross-sectional view of the inner support portion of the present invention;

[0030] Figure 8 This is a schematic diagram of the flush support component structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the turntable and slot structure of the present invention;

[0032] Figure 10 This is a schematic diagram of the welding assembly structure of the present invention.

[0033] Explanation of the labels in the diagram:

[0034] 1. Base; 2. Screw drive unit; 3. Moving seat; 4. Cooperative rotation assembly; 41. Fixed seat; 42. Motor 1; 43. Rotating shaft; 44. Gear 1; 45. Gear 2; 5. Inner support assembly; 51. Column; 52. Motor 2; 53. Heat dissipation sleeve; 54. Gear 3; 55. Turntable 1; 56. Guide groove 1; 57. Inner support unit 1; 571. Movable groove; 572. Grinding block; 573. Spring; 6. Outer clamp assembly; 61. Vertical plate; 62. Motor 3; 63. Gear 5; 64. Gear disc 1; 65. Guide groove 2; 66. Outer clamp; 67. Arc-shaped clamp; 68. Ball bearing; 7. Flush support assembly; 71. Seat; 72. Connecting shaft; 73. Motor 4; 74. Inner rotating shaft; 75. Turntable 2; 76. Guide groove 3; 7 7. Rotating part one; 78. Inner support part two; 79. Support roller; 8. Traction assembly; 81. Bracket one; 82. Guide rod; 83. Screw; 84. Motor five; 85. Movable seat; 86. Connecting column; 87. Traction inner support part; 871. Slide one; 872. Motor six; 873. Gear six; 874. Gear plate two; 875. Turntable three; 876. Guide groove four; 877. Rotating part two; 878. Inner support part three; 88. Alternating groove; 9. Welding assembly; 91. Frame; 92. Lifting seat; 93. Cylinder; 94. Grinding roller; 95. Motor seven; 96. Turntable four; 97. Screw adjustment part; 98. Slide two; 981. Motor eight; 982. Bracket two; 99. Welding part; 10. Turntable five; 101. Slot; 102. Insert block. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1 to 10 A welding device for aluminum alloy profiles includes a base 1, two movable seats 3 slidably connected to the upper end of the base 1, two screw drive parts 2 connected inside the base 1 and respectively driving the two movable seats 3 to move, and a welding assembly 9 connected to the upper end of the base 1.

[0037] Each of the two movable seats 3 is connected to an inner support assembly 5 on one side, and the inner support assembly 5 includes a column 51 rotatably connected to one side of the movable seat 3, a plurality of inner support parts 57 movably inserted into the inside of the column 51, and a drive assembly located inside the column 51 and driving one end of the plurality of inner support parts 57 to move out of the column 51.

[0038] Both of the movable seats 3 are connected to an external clamping assembly 6 on one side. The external clamping assembly 6 includes a vertical plate 61 fixed to one side of the movable seat 3, a hollow groove opened inside the vertical plate 61, multiple external clamping parts 66 movably inserted into the vertical plate 61 and with one end extending into the hollow groove, a driving assembly 2 located inside the vertical plate 61 and driving one end of the multiple external clamping parts 66 to move towards the center of the hollow groove, multiple arc-shaped clamping plates 67 respectively fixed to one end of the multiple external clamping parts 66, and ball bearings 68 rotatably connected to one side of the multiple arc-shaped clamping plates 67. The output shaft of the motor 3 62 is connected to the gear 5 63.

[0039] The drive assembly includes a turntable 55 rotatably connected inside the column 51, a gear 4 fixed to one side of the turntable 55, a motor 52 fixed inside the column 51, a gear 54 rotatably connected inside the column 51 and meshing with the gear 4, multiple guide grooves 56 formed inside the turntable 55, and multiple rotating parts 57 fixed to one side of multiple inner support parts 57 and located in the guide grooves 56. One end of the multiple inner support parts 57 extends outward from inside the column 51. The output shaft of the motor 52 is connected to the gear 54, and a heat dissipation sleeve 53 is fitted around the motor 52.

[0040] The second drive assembly includes a gear disk 64 rotatably connected inside the upright plate 61 and a gear 63 meshing with the gear disk 64, multiple guide grooves 65 opened inside the gear disk 64, and multiple rotating parts 4 respectively fixed to one side of multiple outer clamps 66 and located in the guide grooves 65. A motor 62 is fixed to one side of the upright plate 61, and the output shaft of the motor 62 is connected to the gear 63.

[0041] The base 1 is also connected to a coordinating rotation assembly 4 that drives the two columns 51 to rotate synchronously. The coordinating rotation assembly 4 includes two gears 45 and two gears 44 respectively rotatably connected to one side of the two movable seats 3, three fixed seats 41 fixed to the upper end of the base 1, and two rotating shafts 43 rotatably connected to the two adjacent fixed seats 41 at both ends. The two gears 45 are respectively fixed to the outside of the two columns 51, and the two gears 45 mesh with the two gears 44 respectively. A motor 42 is fixed to one side of one of the fixed seats 41, and the output shaft of the motor 42 is fixed to one end of one of the columns 51. One end of one of the rotating shafts 43 passes through one of the fixed seats 41 and is fixed to one end of the other rotating shaft 43.

[0042] By adopting the above technical solution, the two tubular aluminum profiles to be welded are respectively sleeved on the outside of the two columns 51. The motor 2 52 inside the two columns 51 is controlled to drive the turntable 1 55 to rotate. The rotation of the turntable 1 55 can drive the rotating part 3 on one side of the inner support part 1 57 to move through the guide groove 1 56. The movement of the rotating part 3 can drive the inner support part 1 57 to move, so that the inner support part 1 57 moves from inside the column 51 to the outside until one end of the inner support part 1 57 contacts the inner wall of the pipe fitting. The inner support part 1 57 provides internal support to the inner wall of the pipe fitting. The motor 3 62 on one side of the two vertical plates 61 is controlled to drive the gear 5 63 to rotate. The rotation of the gear 5 63 drives the gear disk 1 64 to rotate. The rotation of the gear disk 1 64 drives the rotating part 4 on one side of the outer clamping part 66 to move through the guide groove 2 65. The movement of the rotating part 4 can drive the gear disk 1 64 to move through the guide groove 2 65. The outer clamp 66 is able to move towards the center of the hollow groove opened on the vertical plate 61, so that the arc-shaped clamping plate 67 at one end of the outer clamp 66 moves closer to the outer surface of the pipe, so that the multiple balls 68 on one side of the arc-shaped clamping plate 67 are in contact with the outer surface of the pipe, and the clamping force is applied to the outer surface of the pipe through the outer clamp 66. It should be noted that by installing sensors inside both the column 51 and the vertical plate 61 to detect the outward extension distance of the inner support 57 and the outer clamp 66, the outward extension distance of the inner support 57 and the outer clamp 66 inside the two columns 51 and the two vertical plates 61 can be controlled to be the same, which facilitates the centering and clamping of the two pipes. The sensor for detecting the movement distance of the object is a mature prior art, which will not be described in detail here, and the sensor is not shown in the drawings of this application specification.

[0043] The inner support holds the inner wall of the pipe, preventing it from shifting under stress during welding. The outer clamp clamps it from the outside, aligning the ends of the two pipes and preventing misalignment, thus ensuring the coaxiality of the two pipes during welding. At the same time, the inner support acts as a core, counteracting the shrinkage caused by welding thermal stress and maintaining roundness. The outer clamp restricts the expansion or misalignment of the outer wall, preventing localized burn-in and deformation at the welded ends of the pipes. The combination of the two results in a more uniform weld gap, which is beneficial for penetration and forming, minimizing misalignment, and producing a neat and aesthetically pleasing weld.

[0044] After the pipe fittings are clamped and positioned simultaneously by the inner support assembly 5 and the outer clamping assembly 6, the control screw drive unit 2 drives the two moving seats 3 to move towards each other. The gear 44 on one side of the two moving seats 3 can translate outside the two rotating shafts 43, so that the two pipe fittings are brought closer to each other. When one end of the two pipe fittings contacts each other, the welding assembly 9 welds the seam at the connecting end of the two pipe fittings. During the welding process, the control motor 42 works. Since one end of the two rotating shafts 43 is fixed, when the motor 42 works, it can drive the two rotating shafts 43 to rotate simultaneously. The rotation of the two rotating shafts 43 drives the two gears 44 and the column 51 to rotate. The rotation of the column 51 can cause the inner support assembly 5 to rotate. The rotation of the inner support assembly 5 drives the pipe fitting to rotate through the inner support part 57 supported inside the pipe fitting, so that the two pipe fittings rotate synchronously and are welded.

[0045] like Figure 2 , Figures 4-7 As shown, the inner support part 57 has a movable groove 571 inside, and a grinding block 572 is slidably connected in the movable groove 571. A spring 573 is fixedly connected to the lower end of the grinding block 572, and the other end of the spring 573 is connected to the inner wall of the movable groove 571.

[0046] Each of the two movable seats 3 is connected to a traction assembly 8 on one side. The traction assembly 8 includes a bracket 81 fixed to one side of the movable seat 3, a guide rod 82 with both ends fixed to the inner wall of the bracket 81 and one side of the movable seat 3 respectively, a lead screw 83 with both ends rotatably connected to the inner wall of the bracket 81 and one side of the movable seat 3 respectively, a movable seat 85 movably sleeved outside the guide rod 82 and screwed outside the lead screw 83, a motor 84 fixed to one side of the bracket 81 and whose output shaft is connected to the lead screw 83, a clearance groove 88 opened inside the column 51, a traction inner support part 87 slidably connected in the clearance groove 88, and a connecting column 86 movably inserted inside the column 51. One end of the connecting column 86 is fixed to the traction inner support part 87, and the other end of the connecting column 86 is rotatably connected to one side of the movable seat 85.

[0047] The traction inner support 87 includes a slide block 871 movably connected inside the clearance groove 88, a motor 872 fixed to one side of the slide block 871, a turntable 875 rotatably connected inside the slide block 871, a gear 874 fixed to one side of the turntable 875, a gear 873 rotatably connected inside the slide block 871 and meshing with the gear 874, multiple guide grooves 876 opened inside the turntable 875, multiple inner support parts 878 movably connected inside the slide block 871, and multiple rotating parts 877 fixed to one side of the multiple inner support parts 878 and located in the guide grooves 876. The other ends of the multiple inner support parts 878 protrude from the slide block 871 and the clearance groove 88 and extend outward.

[0048] By adopting the above technical solution, one end of the pipe fitting is fitted onto the outside of the column 51, and multiple inner supports 57 are controlled to move outward from inside the column 51. At this time, the outward end of the inner support 57 is not in contact with the inner wall of the pipe fitting. By extending the inner support 57, the outer surface of the grinding block 572 is made to contact the inner wall of the pipe fitting first, so that the area of ​​the inner wall of the pipe fitting that is about to contact the inner support 878 can be cleaned and simply rough ground. Then, the motor 872 is controlled to work, and the motor 872 drives the gear 873 to rotate. The rotation of the gear 873 drives the gear disc 874 and the turntable 875 to rotate. The rotation of turntable 3 875 drives multiple rotating parts 2 877 to move via guide groove 4 876. When multiple rotating parts 2 877 move in guide groove 4 876, they can drive inner support parts 3 878 to move inside slide 1 871. One end of multiple inner support parts 3 878 extends outward and moves towards the inner wall of the pipe fitting. Through multiple inner support parts 3 878, the pipe fitting can be internally supported at the end facing the moving seat 3. After multiple inner support parts 3 878 internally support the pipe fitting, control motor 5 84 works and drives screw 83 to rotate. The rotation of screw 83 drives movable seat 85 to move. Movable seat 85 moves smoothly. The guide rod 82 moves horizontally, and during the horizontal movement of the movable seat 85, it can drive the connecting column 86 and the traction inner support part 87 to move horizontally. Multiple inner support parts 878 can move horizontally in the relief groove 88. When multiple inner support parts 878 move horizontally, they can drive the entire pipe to move horizontally outside the base 1. During the horizontal movement of the pipe, the grinding block 572 can move and grind a part of the inner wall of the pipe. When the other end of the pipe reaches the edge of one end of the column 51, the motor 84 stops working. At this time, the motor 52 is controlled to continue rotating so that multiple inner support parts 57 continue to extend until one end of multiple inner support parts 57 is reached. The grinding block 572 contacts the inner wall of the pipe fitting, providing internal support to the other end of the pipe fitting. When the inner support part 57 contacts the inner wall of the pipe fitting, the grinding block 572 moves into the movable groove 571, and the spring 573 is compressed. The traction inner support part 87 is used to provide internal support to the inner wall of one end of the pipe fitting. At the same time, the traction inner support part 87 is also used to translate and drive the pipe fitting to translate outside the column 51. Since part of the inner wall of the pipe fitting has been ground by the grinding block 572, the surface flatness of the inner wall of the pipe fitting is improved. The inner support part 57 and the inner support part 878 fit more evenly with the pipe wall, and the positioning effect is more reliable, which helps to ensure the coaxiality and stability of the pipe during welding.

[0049] like Figure 2 , Figure 5 , Figure 8 and Figure 9As shown, one end of one of the columns 51 is also connected to a flush support assembly 7, and the flush support assembly 7 includes a base 71, a turntable 75 rotatably connected inside the base 71, an inner rotating shaft 74 fixed to one end of the turntable 75, a plurality of guide grooves 76 formed inside the turntable 75, a plurality of inner supports 78 movably inserted inside the base 71, a plurality of rotating parts 77 respectively fixed to one side of the plurality of inner supports 78 and located in the guide grooves 76, and rotatably connected to the plurality of inner supports 78. Multiple support rollers 79 on one side, and one end of multiple inner support parts 78 protruding from the seat body 71 and extending outward; one end of the seat body 71 is fixedly connected to a connecting shaft 72, and the other end of the connecting shaft 72 passes through the column 51, the inner support assembly 5, the traction inner support part 87, the connecting column 86, the movable seat 85 and is fixedly connected to the inner wall of the bracket 81; the inner rotating shaft 74 is rotatably connected inside the connecting shaft 72; one side of the bracket 81 is fixedly connected to a motor 73, and the output shaft of the motor 73 is connected to the inner rotating shaft 74.

[0050] The base 71 is rotatably connected to a turntable 10 on one side, and a plurality of slots 101 are provided on one side of the turntable 10. A plurality of inserts 102 for inserting into the slots 101 are fixed to one end of another column 51.

[0051] By adopting the above technical solution, when the pipe fittings are installed on the outside of both inner support components 5, and the control screw drive unit 2 drives the two moving seats 3 to move towards each other, so that the two pipe fittings are close to each other and one end of the two pipe fittings are in contact, the joint to be welded between the two pipe fittings is located outside the seat body 71. At this time, the control motor 4 73 drives the inner rotating shaft 74 to rotate inside the connecting shaft 72. The rotation of the inner rotating shaft 74 can drive the turntable 2 75 to rotate inside the seat body 71. The rotation of the turntable 2 75 drives the multiple rotating parts 1 77 to move through the guide groove 3 76. The multiple rotating parts 1 77 move in the guide groove 3 76 and drive the multiple inner support parts 2 78 to move in the seat body 71, so that one end of the multiple inner support parts 2 78 extends out and moves towards the weld joint at the end where the two pipe fittings are connected. When 78 moves towards the inner wall of the pipe, the support rollers 79 inside the multiple inner support parts 78 can contact the inner wall of the pipe. Since the seat 71 is fixed to one end of the connecting shaft 72 and the other end of the connecting shaft 72 is fixed to the bracket 81, when the two inner support components 5 drive the two pipes to rotate synchronously, the seat 71 will not rotate synchronously with the two pipes. At this time, the inner wall of the weld joint connecting the two pipes is in rolling contact with the multiple support rollers 79. The multiple support rollers 79 position the inside of the weld joint of the two pipes, forcing the inner walls of the joint of the two pipes to align, reducing misalignment, and maintaining the coaxiality of the pipes. At the same time, when welding is heated, local shrinkage force will appear near the joint. The support rollers 79 form point support in this area, which can resist part of the shrinkage force and reduce pipe collapse or elliptical deformation.

[0052] like Figure 1 and Figure 10 As shown, a welding assembly 9 is connected to the base 1, and the welding assembly 9 includes a frame 91 fixed to the base 1, a cylinder 93 fixed to the upper end of the frame 91, a lifting seat 92 slidably connected to the inner wall of the frame 91 and fixed to the telescopic end of the cylinder 93, two turntables 96 rotatably connected to both sides of the lifting seat 92 and rotating synchronously, a motor 95 fixed to one side of the lifting seat 92 for driving the two turntables 96 to rotate, two slide blocks 98 slidably connected to one side of the two turntables 96, and two slide blocks 98 connected to the two turntables 96 respectively. The turntable 4 96 has two screw adjustment parts 97 for driving the slide 2 98 to move, a bracket 2 982 fixed to one side of the slide 2 98, a grinding roller 94 rotatably connected inside the bracket 2 982, a motor 8 981 fixed to one side of the slide 2 98 and driving the grinding roller 94 to rotate, and a welding part 99 fixed to the lower end of the lifting seat 92; the lifting seat 92 has a worm gear and a worm connected to the worm gear drive inside, the two ends of the worm gear are fixed to the two turntables 4 96 respectively, and the output shaft of the motor 8 981 is connected to the worm.

[0053] By adopting the above technical solution, after the two inner support components 5 and the two outer clamping components 6 fix the two pipe fittings with inner support and outer clamping, before welding, the two moving seats 3 are controlled to move towards each other, so that the two pipe fittings move towards each other and move to the bottom of the frame 91. The cylinder 93 is controlled to extend and drive the lifting seat 92 to descend, so that the center of the turntable 96 is on the same axis as the center of the pipe fitting. Then, the screw adjustment part 97 is controlled to work to drive the slide 98 to move. The movement of the slide 98 drives the grinding roller 94 to move, so that the grinding roller 94 can contact the outer surface or inner surface of the pipe fitting. The motor 981 works to drive the grinding roller 94 to rotate, and grinds the outer or inner surface of the connected end of the two pipe fittings that needs to be welded, thereby improving the weld quality.

[0054] Instructions for use: Place the two tubular aluminum profiles to be welded onto the outside of the two columns 51 respectively. Control the motor 2 52 inside the two columns 51 to drive the turntable 1 55 to rotate. The rotation of the turntable 1 55 drives the rotating part 3 on one side of the inner support part 1 57 to move through the guide groove 1 56. The movement of the rotating part 3 drives the inner support part 1 57 to move, causing the inner support part 1 57 to move from inside the column 51 outwards until one end of the inner support part 1 57 contacts the inner wall of the pipe. The inner support part 1 57 then presses against the inner wall of the pipe. The internal support controls the operation of motor 3 62 on one side of the two vertical plates 61. The operation of motor 3 62 drives gear 5 63 to rotate, which in turn drives gear disc 1 64 to rotate. The rotation of gear disc 1 64 drives the rotating part 4 on one side of the outer clamping part 66 to move through guide groove 2 65. The movement of rotating part 4 drives the outer clamping part 66 to move towards the center of the hollow groove opened on the vertical plate 61, so that the arc-shaped clamping plate 67 at one end of the outer clamping part 66 moves closer to the outer surface of the pipe, causing multiple [features] on one side of the arc-shaped clamping plate 67 to [move]. The ball bearing 68 is in contact with the outer surface of the pipe fitting, and the outer clamping part 66 applies clamping force to the outer surface of the pipe fitting. After the pipe fitting is clamped and positioned by the inner support assembly 5 and the outer clamping assembly 6, the screw drive part 2 is controlled to drive the two moving seats 3 to move towards each other, so that the two pipe fittings are close to each other. Then, the welding assembly 9 is controlled to grind the outer or inner surface of the connecting end of the two pipe fittings to be welded. After grinding, the moving seat 3 is controlled to continue to move, so that one end of the two pipe fittings contacts each other. The flush support assembly 7 is used to position the inside of the weld joint of the two pipe fittings. Then, the welding part 99 is controlled to work to weld the weld joint of the two pipe fittings. During the welding process, the motor 42 is controlled to work, driving the two rotating shafts 43 to rotate simultaneously. The rotation of the two rotating shafts 43 drives the two gears 44 and the column 51 to rotate. The rotation of the column 51 enables the inner support assembly 5 to rotate. The rotation of the inner support assembly 5 drives the pipe fitting to rotate through the inner support part 57 supported inside the pipe fitting, so that the two pipe fittings rotate synchronously and are welded.

[0055] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A welding device for aluminum alloy profiles, comprising a base (1), two movable seats (3) slidably connected to the upper end of the base (1), two screw drive units (2) connected inside the base (1) and respectively driving the two movable seats (3) to move, and a welding assembly (9) connected to the upper end of the base (1), characterized in that: Each of the two movable seats (3) is connected to an inner support assembly (5) on one side, and the inner support assembly (5) includes a column (51) rotatably connected to one side of the movable seat (3), a plurality of inner support parts (57) movably inserted into the inside of the column (51), and a drive assembly located inside the column (51) and driving one end of the plurality of inner support parts (57) to move out of the column (51). Both of the two movable seats (3) are connected to an external clamping assembly (6) on one side. The external clamping assembly (6) includes a vertical plate (61) fixed to one side of the movable seat (3), a hollow groove opened inside the vertical plate (61), multiple external clamping parts (66) movably inserted into the vertical plate (61) and one end extending into the hollow groove, a second drive assembly located inside the vertical plate (61) and driving one end of the multiple external clamping parts (66) to move towards the center of the hollow groove, multiple arc-shaped clamping plates (67) fixed to one end of the multiple external clamping parts (66), and ball bearings (68) rotatably connected to one side of the multiple arc-shaped clamping plates (67). The output shaft of the motor (62) is connected to the gear (63).

2. The welding device for aluminum alloy profiles according to claim 1, characterized in that: The drive assembly includes a turntable (55) rotatably connected inside the column (51), a gear four fixed to one side of the turntable (55), a motor two (52) fixed inside the column (51), a gear three (54) rotatably connected inside the column (51) and meshing with the gear four, multiple guide grooves one (56) opened inside the turntable (55), and multiple rotating parts three respectively fixed to one side of multiple inner support parts one (57) and located in the guide grooves one (56). One end of the multiple inner support parts one (57) extends outward from inside the column (51). The output shaft of the motor two (52) is connected to the gear three (54), and a heat dissipation sleeve (53) is sleeved on the outside of the motor two (52).

3. The welding device for aluminum alloy profiles according to claim 2, characterized in that: The second drive assembly includes a gear disk 1 (64) rotatably connected inside the upright plate (61) and a gear 5 (63) meshing with the gear disk 1 (64), a plurality of guide grooves 2 (65) opened inside the gear disk 1 (64), and a plurality of rotating parts 4 respectively fixed to one side of a plurality of outer clamps (66) and located in the guide grooves 2 (65). A motor 3 (62) is fixed to one side of the upright plate (61), and the output shaft of the motor 3 (62) is connected to the gear 5 (63).

4. The welding device for aluminum alloy profiles according to claim 3, characterized in that: The base (1) is also connected to a co-rotating assembly (4) that drives the two columns (51) to rotate synchronously. The co-rotating assembly (4) includes two gears (45) and two gears (44) respectively rotatably connected to one side of the two movable seats (3), three fixed seats (41) fixed to the upper end of the base (1), and two rotating shafts (43) rotatably connected to the two adjacent fixed seats (41) at both ends. The two gears (45) are respectively fixed to the outside of the two columns (51), and the two gears (45) mesh with the two gears (44) respectively. One of the fixed seats (41) is fixed to one side of a motor (42), and the output shaft of the motor (42) is fixed to one end of one of the columns (51). One end of one rotating shaft (43) passes through one of the fixed seats (41) and is fixed to one end of the other rotating shaft (43).

5. The welding device for aluminum alloy profiles according to claim 4, characterized in that: The inner support part (57) has a movable groove (571) inside, and a grinding block (572) is slidably connected in the movable groove (571). A spring (573) is fixedly connected to the lower end of the grinding block (572), and the other end of the spring (573) is connected to the inner wall of the movable groove (571).

6. The welding device for aluminum alloy profiles according to claim 5, characterized in that: Each of the two movable seats (3) is connected to a traction assembly (8) on one side, and the traction assembly (8) includes a bracket (81) fixed to one side of the movable seat (3), a guide rod (82) with both ends fixed to the inner wall of the bracket (81) and one side of the movable seat (3) respectively, a screw rod (83) with both ends rotatably connected to the inner wall of the bracket (81) and one side of the movable seat (3) respectively, and a movable seat (83) movably sleeved on the outside of the guide rod (82) and screwed on the outside of the screw rod (83). 5) Motor 5 (84) fixed to one side of bracket 1 (81) and whose output shaft is connected to lead screw (83), a clearance groove (88) opened inside column (51), a traction inner support part (87) slidably connected in clearance groove (88), and a connecting column (86) movably inserted into column (51), with one end of connecting column (86) fixedly connected to traction inner support part (87), and the other end of connecting column (86) rotatably connected to one side of movable seat (85).

7. The welding device for aluminum alloy profiles according to claim 6, characterized in that: The traction inner support (87) includes a slide block 1 (871) movably connected inside the relief groove (88), a motor 6 (872) fixed to one side of the slide block 1 (871), a turntable 3 (875) rotatably connected inside the slide block 1 (871), a gear 2 (874) fixed to one side of the turntable 3 (875), a gear 6 (873) rotatably connected inside the slide block 1 (871) and meshing with the gear 2 (874), a plurality of guide grooves 4 (876) opened inside the turntable 3 (875), a plurality of inner support parts 3 (878) movably connected inside the slide block 1 (871), and a plurality of rotating parts 2 (877) respectively fixed to one side of the plurality of inner support parts 3 (878) and located in the guide grooves 4 (876). The other ends of the plurality of inner support parts 3 (878) protrude from the slide block 1 (871) and the relief groove (88) and extend outward.

8. The welding apparatus for aluminum alloy profiles according to claim 7, characterized in that: One end of one of the columns (51) is also connected to a flush support assembly (7), and the flush support assembly (7) includes a base (71), a turntable two (75) rotatably connected inside the base (71), an inner rotating shaft (74) fixed to one end of the turntable two (75), a plurality of guide grooves three (76) opened inside the turntable two (75), a plurality of inner support parts two (78) movably inserted into the base (71), a plurality of rotating parts one (77) respectively fixed to one side of the plurality of inner support parts two (78) and located in the guide grooves three (76), and a plurality of rotating parts one (77) respectively rotatably connected to one side of the plurality of inner support parts two (78). Multiple support rollers (79), one end of multiple inner support parts (78) protrudes from the seat (71) and extends outward; one end of the seat (71) is fixedly connected to a connecting shaft (72), and the other end of the connecting shaft (72) passes through the column (51), the inner support assembly (5), the traction inner support part (87), the connecting column (86), the movable seat (85) and is fixedly connected to the inner wall of the bracket (81); the inner rotating shaft (74) is rotatably connected to the inside of the connecting shaft (72); one side of the bracket (81) is fixedly connected to a motor (73), and the output shaft of the motor (73) is connected to the inner rotating shaft (74).

9. The welding apparatus for aluminum alloy profiles according to claim 8, characterized in that: The base (71) is rotatably connected to a turntable five (10) on one side, and a plurality of slots (101) are provided on one side of the turntable five (10). A plurality of inserts (102) for inserting into the slots (101) are fixed to one end of another column (51).

10. A welding device for aluminum alloy profiles according to claim 9, characterized in that: The base (1) is connected to a welding assembly (9), which includes a frame (91) fixed to the base (1), a cylinder (93) fixed to the upper end of the frame (91), a lifting seat (92) slidably connected to the inner wall of the frame (91) and fixed to the telescopic end of the cylinder (93), two turntables (96) rotatably connected to both sides of the lifting seat (92) and rotating synchronously, and a motor (95) fixed to one side of the lifting seat (92) for driving the two turntables (96) to rotate. Two slide blocks two (98) are respectively slidably connected to one side of the two turntables four (96), two screw adjustment parts (97) are respectively connected to one side of the two turntables four (96) for driving the slide blocks two (98) to move, a bracket two (982) is fixed to one side of the slide blocks two (98), a grinding roller (94) is rotatably connected inside the bracket two (982), a motor eight (981) is fixed to one side of the slide blocks two (98) and drives the grinding roller (94) to rotate, and a welding part (99) is fixed to the lower end of the lifting seat (92).

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