Positioning device for welding door and window aluminum frame

Abstract

The invention relates to the technical field of door and window welding, in particular to a door and window aluminum frame welding positioning device which comprises a table plate, a base is fixedly mounted at the top of the table plate through a plurality of supporting rods, two symmetrical first electric push rods are fixedly mounted at the bottom of the base, and mounting frames are fixedly mounted at the telescopic ends of the two first electric push rods. Second electric push rods are fixedly mounted at the tops of the two mounting frames, thickness measuring plates are fixedly mounted at the telescopic ends of the bottoms of the two second electric push rods, ejector rods are welded to the bottoms of the two thickness measuring plates, pressing plates are slidably arranged at the bottoms of the two ejector rods, an extension rod is welded to the side wall of one pressing plate, and the extension rod is welded to the side wall of the other pressing plate. The welding speed, the preheating speed and the preheating temperature are adaptively adjusted according to the downward moving distance of the thickness measuring plate, and the influence of air hole defects and hot cracks on the product quality is reduced; while the welding effect is improved, the energy loss is reduced, and the workload of manual operation of workers is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of door and window welding, in particular to a welding positioning device for door and window aluminum frames. Background Art

[0002] The welding of aluminum frames for doors and windows is a key process in the manufacturing process of doors and windows. Its quality directly affects the strength, sealing, aesthetics and service life of doors and windows. Welding connects the cut aluminum profiles into a complete door and window frame, providing necessary support and stability for doors and windows. High-quality welding can effectively prevent gaps in doors and windows, ensure good air tightness and water tightness, and improve the sound insulation, heat insulation and waterproof performance of doors and windows. The treatment of welding marks directly affects the appearance of doors and windows. Fine welding technology can make doors and windows more beautiful and generous. In the early days, manual arc welding, gas welding and other methods were mainly used, which had low efficiency, poor precision and unstable welding quality. With the advancement of technology, high-precision and high-efficiency welding methods such as argon arc welding and laser welding have gradually become popular, effectively improving welding quality and production efficiency. When welding customized aluminum frames for doors and windows in the factory, the positioning device must first be used to accurately position the aluminum frames for doors and windows. Subsequently, the staff must adjust the relevant welding parameters according to the wall thickness of the aluminum frames for doors and windows to be welded. This process is relatively time-consuming, thereby slowing down the welding rate of the aluminum frames for doors and windows to a certain extent; for this reason, the present invention provides a welding positioning device for aluminum frames for doors and windows. Summary of the invention

[0003] The object of the present invention is to provide a welding positioning device for aluminum frames of doors and windows to solve the problems raised in the above-mentioned background technology.

[0004] The technical solution of the present invention is: a welding and positioning device for aluminum frames of doors and windows, comprising a table board, a base is fixedly installed on the top of the table board through a plurality of support rods, two symmetrical electric push rods 1 are fixedly installed on the bottom of the base, the telescopic ends of the two electric push rods 1 are fixedly installed with mounting frames, the tops of the two mounting frames are fixedly installed with electric push rods 2, the telescopic ends of the two electric push rods 2 are fixedly installed with thickness measuring plates, the bottoms of the two thickness measuring plates are welded with push rods, and the bottoms of the two push rods are slidably provided with pressure plates, an extension rod is welded on the side wall of one of the pressure plates, the bottom of the table board is rotatably connected to a rotating drum, and the end of the extension rod away from the corresponding pressure plate is slidably provided in a spiral groove on the outer peripheral wall of the rotating drum, the outer peripheral wall of the rotating drum is fixedly sleeved with a gear, the bottom of the table board is slidably provided with a slide rod 2, and the end of the slide rod A linkage frame is welded, and a rack meshing with the gear is welded on one side of the linkage frame away from the sliding rod 2. A screw rod is rotatably connected to the bottom of the table board, and a sliding rod 3 is welded on the end of the screw rod. A core body is slidably provided on the outer peripheral wall of the sliding rod 3, and the core body is rotatably connected between the two sides of the linkage frame, and a rubber ring is provided on the external fixed sleeve of the core body. The set electric push rod 1 can drive the mounting frame and the thickness measuring plate to move linearly, so as to adapt to the different lengths of the door and window aluminum frames; the subsequently set electric push rod 1 drives the thickness measuring plate to move to the inner side of the corresponding door and window aluminum frame; the subsequently set electric push rod 2 drives the thickness measuring plate to move downward, so that the bottom of the thickness measuring plate abuts against the bottom of the inner side of the corresponding door and window aluminum frame, so as to measure the wall thickness of the door and window aluminum frame; wherein, the set thickness measuring plate can also perform secondary limit fixation on the door and window aluminum frame, so as to enhance the stability of the door and window aluminum frame during welding.

[0005] Preferably, a plurality of limit rods are welded to the bottom of the base, and the two mounting frames are slidably disposed between the corresponding two limit rods, respectively, and the set limit rods limit and constrain the mounting frames during movement.

[0006] Preferably, a plurality of slide bars 1 are welded to the bottom of the table top, and two pressure plates are slidably arranged between the corresponding two slide bars 1, and a spring 1 is wound around the outer peripheral wall of the plurality of slide bars 1.

[0007] Preferably, a strip block is welded at the bottom of the table top, and a second slide rod is slidably arranged on the side wall of the strip block, a second spring is wound around the outer peripheral wall of the second slide rod, and the second spring is connected between the strip block and the linkage frame.

[0008] Preferably, a motor is fixedly installed at the bottom of the table top, a conical table body is fixedly installed at the output end of the motor, and the outer wall of the rubber ring is in contact with the outer wall of the conical table body. The motor drives the conical table body to rotate, and the conical table body drives the rubber ring and the core body to rotate.

[0009] Preferably, a column frame is threadedly connected to the outer peripheral wall of the screw rod, and a laser welding device is fixedly installed on one end of the column frame.

[0010] Preferably, a plurality of cooling water channels are distributed circumferentially at equal intervals between the side walls at both ends of the core body, annular cooling water pipes are welded on the side walls at both ends of the core body, two annular push plates are welded on the bottom of the table board, and the two annular push plates slide in the inner cavities of the corresponding annular cooling water pipes respectively. During the movement of the core body, the set core body will drive the annular cooling water pipes on both sides thereof to move, thereby causing the annular cooling water pipes and the annular push plates to be relatively displaced, prompting the coolant in the annular cooling water pipes and the cooling water channels to flow, thereby dissipating the heat to the outer surface of the core body and the rubber ring fixedly mounted on the outer surface of the core body, thereby improving the service life of the rubber ring.

[0011] Preferably, a preheating box is fixedly installed on the side wall of the table top, and a check valve is arranged inside several air inlet pipes at the bottom of the preheating box. An air pump is fixedly installed on the top of the preheating box, and the input end of the air pump is connected with the inner cavity of the preheating box. A preheating pipe is fixedly installed on the side wall of the laser welding instrument, and the output end of the air pump is connected with the top of the preheating pipe through the air delivery pipe. Several electric heating wires and several conductive coils are fixedly installed at equal intervals in the inner cavity of the preheating box. Several sliding rods four are slidably arranged at equal intervals on the side wall of the preheating box, and several of the sliding rods four are fixedly installed with powered coils on one side of the inner cavity of the preheating box, and several electric heating wires and conductive coils are fixedly installed at equal intervals in the inner cavity of the preheating box. The wires are electrically connected to the corresponding energized coils respectively, and springs four are wound around the outer peripheral walls of the sliding rods four, and the springs four are respectively connected between the corresponding energized coils and the side walls of the inner cavity of the preheating box. A slope block is welded on the side of the sliding rod two away from the linkage frame. In the initial state, the several conductive coils and the corresponding energized coils are in a connected state; when the slope block moves linearly, the set slope block will push the several sliding rods four and the corresponding energized coils to move in turn, thereby disconnecting the several conductive coils from the corresponding energized coils in turn, thereby realizing adaptive adjustment of the number of energized heating wires, and then realizing adaptive adjustment of the preheating temperature.

[0012] The present invention provides a welding positioning device for aluminum frames of doors and windows through improvement, which has the following improvements and advantages compared with the prior art:

[0013] 1. The second electric push rod drives the thickness measuring plate to move downward, so that the bottom of the thickness measuring plate abuts against the bottom of the inner side of the corresponding door and window aluminum frame, so as to measure the wall thickness of the door and window aluminum frame; the thickness measuring plate can also perform secondary limit fixation on the door and window aluminum frame, so as to enhance the stability of the door and window aluminum frame during welding;

[0014] 2. According to the distance the thickness measuring plate moves down, the welding speed, preheating speed and preheating temperature are adjusted adaptively to reduce the impact of porosity defects and thermal cracks on product quality; while improving the welding effect, it reduces energy loss and reduces the workload of manual operation of the staff;

[0015] 3. During the movement of the core body, the set core body will drive the annular cooling water pipes on both sides to move, thereby causing the annular cooling water pipes and the annular push plate to have relative displacement, prompting the coolant in the annular cooling water pipes and the cooling water channel to circulate, thereby dissipating the heat of the outer surface of the core body and the rubber ring fixed on the outer surface of the core body, thereby improving the service life of the rubber ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the top structure of the base of the present invention;

[0019] Figure 3 It is a schematic diagram of the top rod structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the bottom structure of the table top of the present invention;

[0021] Figure 5 It is a schematic diagram of the pressing plate structure of the present invention;

[0022] Figure 6 The present invention Figure 5 A schematic diagram of the enlarged structure of part A;

[0023] Figure 7 It is a schematic diagram of the linkage frame structure of the present invention;

[0024] Figure 8 The present invention Figure 7 A schematic diagram of the enlarged structure of part B;

[0025] Fig. 9 It is a schematic diagram of the screw rod structure of the present invention;

[0026] Fig.10 The present invention Fig. 9 An enlarged schematic diagram of the C-section structure;

[0027] Fig.11 It is a schematic diagram of the structure of the conductive coil and the energized coil of the present invention.

[0028] Description of reference numerals:

[0029] 1. Table; 2. Base; 3. Electric push rod 1; 4. Mounting frame; 5. Electric push rod 2; 6. Thickness plate; 7. Push rod; 8. Pressure plate; 9. Extension rod; 10. Rotating drum; 11. Gear; 12. Sliding rod 2; 13. Linkage frame; 14. Rack; 15. Screw rod; 16. Sliding rod 3; 17. Core; 18. Rubber ring; 19. Limit rod; 20. Sliding rod 1; 21. Spring 1; 22. shaped block; 23, spring two; 24, motor; 25, conical platform; 26, column frame; 27, laser welding instrument; 28, cooling water channel; 29, annular cooling water pipe; 30, annular push plate; 31, preheating box; 32, one-way valve; 33, air pump; 34, preheating pipe; 35, heating wire; 36, conductive coil; 37, sliding rod four; 38, energized coil; 39, spring four; 40, inclined block. DETAILED DESCRIPTION

[0030] The present invention is described in detail below, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The present invention provides a welding positioning device for aluminum frames of doors and windows through improvement. The technical solution of the present invention is:

[0032] like Figure 1-Figure 11 As shown, a welding positioning device for aluminum frames of doors and windows comprises a table top 1, a base 2 is fixedly installed on the top of the table top 1 through a plurality of support rods, two symmetrical electric push rods 1 3 are fixedly installed on the bottom of the base 2, mounting frames 4 are fixedly installed on the telescopic ends of the two electric push rods 1 3, electric push rods 2 5 are fixedly installed on the tops of the two mounting frames 4, and thickness measuring plates 6 are fixedly installed on the telescopic ends of the two electric push rods 2 5. The electric push rods 1 3 can drive the mounting frames 4 and the thickness measuring plates 6 to move linearly to adapt to aluminum frames of doors and windows of different lengths; the electric push rods 1 3 are then driven The thickness measuring plate 6 is displaced to the inner side of the corresponding door and window aluminum frame; the electric push rod 25 is then arranged to drive the thickness measuring plate 6 to move downward, so that the bottom of the thickness measuring plate 6 is in contact with the bottom of the inner side of the corresponding door and window aluminum frame, so as to measure the wall thickness of the door and window aluminum frame; wherein, the thickness measuring plate 6 can also perform secondary limit fixation on the door and window aluminum frame, so as to enhance the stability of the door and window aluminum frame during welding; wherein, a plurality of limit rods 19 are welded to the bottom of the base 2, and the two mounting frames 4 are respectively slidably arranged between the corresponding two limit rods 19, and the limit rods 19 are arranged to limit the mounting frame 4 during the movement process.

[0033] Furthermore, a push rod 7 is welded to the bottom of the two thickness measuring plates 6, and a pressure plate 8 is slidably arranged at the bottom of the two push rods 7. A plurality of slide rods 20 are welded to the bottom of the table board 1, and the two pressure plates 8 are respectively slidably arranged between the corresponding two slide rods 20. A spring 21 is wound around the outer peripheral wall of the plurality of slide rods 20. An extension rod 9 is welded to the side wall of one of the pressure plates 8. A rotating drum 10 is rotatably connected to the bottom of the table board 1, and the end of the extension rod 9 away from the corresponding pressure plate 8 is slidably arranged in a spiral groove on the outer peripheral wall of the rotating drum 10. A gear 11 is fixedly sleeved on the outer peripheral wall of the rotating drum 10. A slide rod 12 is slidably arranged at the bottom of the table board 1. A strip block 22, and a second slide bar 12 is slidably arranged on the side wall of the strip block 22, a second spring 23 is wound on the outer peripheral wall of the second slide bar 12, and the second spring 23 is connected between the strip block 22 and the linkage frame 13, the end of the slide bar is welded with the linkage frame 13, and the side of the linkage frame 13 away from the second slide bar 12 is welded with a rack 14 meshing with the gear 11, the bottom of the table board 1 is rotatably connected with a screw rod 15, and a third slide bar 16 is welded at the end of the screw rod 15, a core body 17 is slidably arranged on the outer peripheral wall of the third slide bar 16, and the core body 17 is rotatably connected between the two sides of the linkage frame 13, a rubber ring 18 is fixedly sleeved on the outside of the core body 17, and a motor 24 is fixedly installed at the bottom of the table board 1 A conical platform 25 is fixedly installed at the output end of the motor 24, and the outer wall of the rubber ring 18 is in contact with the outer wall of the conical platform 25. A column frame 26 is threadedly connected to the outer peripheral wall of the screw rod 15, and a laser welding instrument 27 is fixedly installed at one end of the column frame 26. A preheating box 31 is fixedly installed on the side wall of the table top 1, and a check valve 32 is arranged inside several air inlet pipes at the bottom of the preheating box 31. An air pump 33 is fixedly installed on the top of the preheating box 31, and the input end of the air pump 33 is connected to the inner cavity of the preheating box 31. A preheating pipe 34 is fixedly installed on the side wall of the laser welding instrument 27, and the output end of the air pump 33 is connected to the top of the preheating pipe 34 through the air delivery pipe. During the downward movement of the thick plate 6, the thickness measuring plate 6 will drive the push rod 7, the pressure plate 8 and the extension rod 9 to move downward. When the extension rod 9 moves downward, it will drive the rotating drum 10 to rotate. The rotating drum 10 will drive the gear 11 to rotate. The gear 11 will drive the rack 14, the linkage frame 13, the core body 17 and the rubber ring 18 to move, so as to adaptively adjust the contact position between the outer wall of the rubber ring 18 and the outer wall of the conical platform 25 according to the downward movement distance of the thickness measuring plate 6, realize the speed change of the rubber ring 18, the core body 17, the sliding rod 16 and the screw 15, and then realize the adaptive adjustment of the movement speed of the column frame 26, the laser welding device 27 and the preheating tube 34.

[0034] Furthermore, a plurality of electric heating wires 35 and a plurality of conductive coils 36 are fixedly installed at equal intervals in the inner cavity of the preheating box 31, a plurality of sliding rods 37 are slidably arranged at equal intervals on the side wall of the preheating box 31, a plurality of sliding rods 37 are fixedly installed with a power-carrying coil 38 on one side of the inner cavity of the preheating box 31, and a plurality of electric heating wires 35 are electrically connected to the corresponding power-carrying coils 38 respectively, a plurality of springs 39 are wound around the outer peripheral walls of the plurality of sliding rods 37, and a plurality of springs 39 are respectively connected between the corresponding power-carrying coils 38 and the preheating box 3 1, a slope block 40 is welded on the side of the slide bar 12 away from the linkage frame 13. In the initial state, the plurality of conductive coils 36 and the corresponding energized coils 38 are in a connected state; when the slope block 40 moves linearly, the set slope block 40 will push the plurality of slide bars 37 and the corresponding energized coils 38 to move in sequence, thereby disconnecting the plurality of conductive coils 36 from the corresponding energized coils 38 in sequence, thereby realizing the adaptive adjustment of the number of energized heating wires 35, and then realizing the adaptive adjustment of the preheating temperature.

[0035] Furthermore, a number of cooling water channels 28 are equidistantly distributed circumferentially between the side walls at both ends of the core 17, annular cooling water pipes 29 are welded on the side walls at both ends of the core 17, two annular push plates 30 are welded on the bottom of the table top 1, and the two annular push plates 30 slide in the corresponding inner cavities of the annular cooling water pipes 29 respectively. During the movement of the core 17, the set core 17 will drive the annular cooling water pipes 29 on both sides to move, thereby causing the annular cooling water pipes 29 and the annular push plates 30 to relative displace, prompting the coolant in the annular cooling water pipes 29 and the cooling water channels 28 to flow, thereby dissipating the heat of the outer surface of the core 17 and the rubber ring 18 fixedly sleeved on the outer surface of the core 17, thereby improving the service life of the rubber ring 18.

[0036] Working principle: when in use, place the two door and window aluminum frames to be welded on the top of the base 2, and then use the positioning structure to limit and fix the two door and window aluminum frames; wherein, the set electric push rod 1 3 can drive the mounting frame 4 and the thickness measuring plate 6 to move linearly, so as to adapt to the door and window aluminum frames of different lengths; then the set electric push rod 1 3 drives the thickness measuring plate 6 to move to the inner side of the corresponding door and window aluminum frame; then the set electric push rod 2 5 drives the thickness measuring plate 6 to move downward, so that the bottom of the thickness measuring plate 6 abuts against the bottom of the inner side of the corresponding door and window aluminum frame, so as to measure the wall thickness of the door and window aluminum frame; wherein, the set thickness measuring plate 6 can also perform secondary limit and fixation on the door and window aluminum frame, so as to enhance the stability of the door and window aluminum frame during welding;

[0037] In the process of the thickness measuring plate 6 moving downward, the set thickness measuring plate 6 will drive the push rod 7, the pressure plate 8 and the extension rod 9 to move downward. Since the end of the extension rod 9 away from the pressure plate 8 is slidably arranged in the spiral groove on the outer peripheral wall of the rotating drum 10, the extension rod 9 will drive the rotating drum 10 to rotate when it moves downward, and the set rotating drum 10 will drive the gear 11 to rotate. The set gear 11 will drive the rack 14, the linkage frame 13, the core body 17 and the rubber ring 18 to move, so as to adjust the contact position of the outer wall of the rubber ring 18 with the outer wall of the conical platform 25 according to the downward movement distance of the thickness measuring plate 6, so as to realize the speed change of the rubber ring 18, the core body 17, the sliding rod 16 and the screw rod 15, and then The moving speed of the column frame 26, the laser welding device 27 and the preheating tube 34 can be adaptively adjusted; in addition, the displacement of the linkage frame 13 will also drive the slide bar 2 12 and the inclined plane block 40 to move linearly, wherein, in the initial state, a plurality of conductive coils 36 and corresponding energized coils 38 are in a connected state; when the inclined plane block 40 moves linearly, the set inclined plane block 40 will push a plurality of slide bars 4 37 and corresponding energized coils 38 to move in turn, thereby disconnecting a plurality of conductive coils 36 from corresponding energized coils 38 in turn, thereby adaptively adjusting the number of energized heating wires 35, thereby adaptively adjusting the preheating temperature; before welding, in the energized state The electric heating wire 35 and the air pump 33 work, and the external gas enters the inner cavity of the preheating box 31 through the one-way valve 32 at the bottom of the preheating box 31, and is heated under the action of the electric heating wire 35. The heated gas is blown out through the preheating tube 34 under the action of the air pump 33, and then the speed-changed screw rod 15 drives the column frame 26 and the preheating tube 34 to move, so as to preheat the part of the door and window aluminum frame to be welded; after the preheating is completed, the speed-changed screw rod 15 drives the column frame 26 and the laser welding device 27 to move, so as to weld the part of the door and window aluminum frame to be welded; when the distance the thickness measuring plate 6 moves downward is greater, it means that the wall thickness of the door and window aluminum frame to be welded is thinner, and the corresponding self- The faster the welding speed after adaptive adjustment, the shorter the time for gas to expand in the metal when welding thin plates, thereby reducing the impact of pore defects on product quality; at the same time, the preheating speed after adaptive adjustment is faster and the preheating temperature is lower, wherein the preheating treatment reduces the temperature difference generated by the aluminum frame during welding and reduces the risk of thermal cracks; in addition, while ensuring the preheating effect, adaptive adjustment reduces energy loss; conversely, the smaller the distance that the thickness measuring plate 6 moves downward, the thicker the wall thickness of the aluminum frame of the door and window to be welded, the slower the welding speed, the slower the preheating speed and the higher the preheating temperature, and the workload of manual operation of the staff is reduced through adaptive adjustment;

[0038] In addition, during the movement of the core 17, the core 17 will drive the annular cooling water pipes 29 on both sides to move, thereby causing the annular cooling water pipes 29 and the annular push plates 30 to be relatively displaced, prompting the coolant in the annular cooling water pipes 29 and the cooling water channels 28 to circulate, thereby dissipating the heat of the outer surface of the core 17 and the rubber ring 18 fixedly mounted on the outer surface of the core 17, thereby increasing the service life of the rubber ring 18.

[0039] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A welding positioning device for aluminum frames of doors and windows, comprising a table top (1), characterized in that: The top of the table top (1) is fixedly mounted with a base (2) via a plurality of support rods, the bottom of the base (2) is fixedly mounted with two symmetrical electric push rods (3), the telescopic ends of the two electric push rods (3) are fixedly mounted with mounting frames (4), the tops of the two mounting frames (4) are fixedly mounted with electric push rods (5), the telescopic ends of the two electric push rods (5) are fixedly mounted with thickness measuring plates (6), the bottoms of the two thickness measuring plates (6) are welded with push rods (7), the bottoms of the two push rods (7) are slidably provided with pressure plates (8), one of the side walls of the pressure plates (8) is welded with an extension rod (9), the bottom of the table top (1) is rotatably connected with a rotating drum (10), and the extension rod (9) is away from the corresponding pressure plate ( One end of the rotating drum (8) is slidably arranged in a spiral groove on the outer peripheral wall of the rotating drum (10), a gear (11) is fixedly sleeved on the outer peripheral wall of the rotating drum (10), a sliding rod 2 (12) is slidably arranged at the bottom of the table board (1), a linkage frame (13) is welded to the end of the sliding rod, and a rack (14) meshing with the gear (11) is welded to the side of the linkage frame (13) away from the sliding rod 2 (12), a screw rod (15) is rotatably connected to the bottom of the table board (1), a sliding rod 3 (16) is welded to the end of the screw rod (15), a core body (17) is slidably arranged on the outer peripheral wall of the sliding rod 3 (16), and the core body (17) is rotatably connected between the two sides of the linkage frame (13), and a rubber ring (18) is fixedly sleeved outside the core body (17).

2. The welding positioning device for door and window aluminum frames according to claim 1 is characterized in that: A plurality of limiting rods (19) are welded to the bottom of the base (2), and the two mounting frames (4) are respectively slidably arranged between the corresponding two limiting rods (19).

3. The welding positioning device for door and window aluminum frames according to claim 1 is characterized in that: A plurality of slide bars (20) are welded to the bottom of the table top (1), and two pressure plates (8) are respectively slidably arranged between two corresponding slide bars (20), and a spring (21) is wound around the outer peripheral wall of each of the slide bars (20).

4. The welding positioning device for door and window aluminum frames according to claim 1 is characterized in that: A strip block (22) is welded to the bottom of the table top (1), and a second slide bar (12) is slidably arranged on the side wall of the strip block (22). A second spring (23) is wound around the outer peripheral wall of the second slide bar (12), and the second spring (23) is connected between the strip block (22) and the linkage frame (13).

5. The welding positioning device for door and window aluminum frames according to claim 1 is characterized in that: A motor (24) is fixedly mounted on the bottom of the table top (1), a conical platform (25) is fixedly mounted on the output end of the motor (24), and the outer wall of the rubber ring (18) is in contact with the outer wall of the conical platform (25).

6. The welding positioning device for door and window aluminum frames according to claim 1 is characterized in that: A column frame (26) is threadedly connected to the outer peripheral wall of the screw rod (15), and a laser welding device (27) is fixedly installed on one end of the column frame (26).

7. The welding positioning device for door and window aluminum frames according to claim 1 is characterized in that: A plurality of cooling water channels (28) are distributed circumferentially at equal intervals between the side walls at both ends of the core (17), annular cooling water pipes (29) are welded to the side walls at both ends of the core (17), two annular push plates (30) are welded to the bottom of the table top (1), and the two annular push plates (30) slide in the inner cavities of the corresponding annular cooling water pipes (29), respectively.

8. The welding positioning device for door and window aluminum frames according to claim 6 is characterized in that: A preheating box (31) is fixedly mounted on the side wall of the table top (1), and a plurality of air inlet pipes at the bottom of the preheating box (31) are each provided with a one-way valve (32). An air pump (33) is fixedly mounted on the top of the preheating box (31), and the input end of the air pump (33) is connected to the inner cavity of the preheating box (31). A preheating pipe (34) is fixedly mounted on the side wall of the laser welding apparatus (27), and the output end of the air pump (33) is connected to the top of the preheating pipe (34) through an air delivery pipe. A plurality of electric heating wires (35) and a plurality of conductive coils (36) are fixedly mounted at equal intervals in the inner cavity of the preheating box (31). A plurality of sliding rods (37) are slidably arranged at equal intervals on the side wall of the preheating box (31); a plurality of the sliding rods (37) are fixedly installed with a power-carrying coil (38) on one side of the inner cavity of the preheating box (31); and a plurality of electric heating wires (35) are respectively electrically connected to the corresponding power-carrying coil (38); a plurality of springs (39) are wound around the outer peripheral walls of the plurality of sliding rods (37); and a plurality of springs (39) are respectively connected between the corresponding power-carrying coil (38) and the inner cavity side wall of the preheating box (31); and a slope block (40) is welded on the side of the sliding rod (12) away from the linkage frame (13).

Images