An automatically positioned handrail skeleton welding tool

Abstract

The application provides an automatic positioning handrail framework welding tool, and relates to the technical field of automobile handrail framework manufacturing. The tool support is provided with an inner table groove in the upper portion, and a transposition servo motor is arranged in the inner table groove. The transposition servo motor is connected with and drives a rotary disc type welding table. Six handrail framework positioning tables are movably arranged on the rotary disc type welding table. A framework rod limiting seat is fixedly connected to the inner end of the upper surface of the handrail framework positioning table. The support rod and the rotary base shell are fixed and properly arranged by the rod body side clamping plate and the round head side clamping plate, respectively. The automatic butt joint, proper arrangement and fixation of the support rod and the rotary base shell are achieved. Manual operation is not needed, time and labor are saved, the problems of low placing efficiency and high deviation rate of manual placing of the handrail framework are solved. After the placing of the handrail framework is completed, the clamping mechanism in the tool is controlled to clamp the handrail framework. The finished product handrail framework after welding and assembly needs to be manually released from clamping and discharged, which is time-consuming and labor-consuming.

Description

Technical Field

[0001] This invention relates to the field of automotive armrest frame manufacturing technology, and in particular to an automatic positioning armrest frame welding fixture. Background Technology

[0002] Car armrests use an armrest frame as their internal support structure. The surface of the frame is covered with TPE leather or latex padding to improve the tactile comfort of the armrest. As the internal support structure of the armrest, the frame directly determines the functionality and durability of the armrest. Its structure must withstand the pressure of the occupant's elbow and is connected to the seat hinge through plug-in columns to ensure the stability of the armrest's opening and closing. The armrest frame is made of high-strength steel or lightweight alloys (such as aluminum alloy). In traditional car armrest frames, the rotating base shell and support rod at the hinge end with the seat are usually assembled by welding using intelligent welding robots.

[0003] Traditional automotive armrest frame welding and assembly processes require the use of tooling or fixtures for support, fixing and connecting the rotating base shell and support rods respectively. Welding robots have high requirements for workpiece positioning accuracy, requiring precise manual adjustment. Manual placement of the armrest frame is inefficient and has a high deviation rate. After the armrest frame is placed, the clamping mechanism in the tooling is controlled to clamp it. The finished armrest frame after welding and assembly needs to be manually released from the clamp and unloaded, which is time-consuming and labor-intensive. Summary of the Invention

[0004] This invention provides an automatically positioned handrail frame welding fixture to solve the problems of traditional automotive handrail frame welding and assembly processes that require the use of fixtures or jigs as supports to fix and connect the rotating base shell and support rods respectively. Welding robots have high requirements for workpiece positioning accuracy, requiring precise manual adjustment. Manual placement of the handrail frame is inefficient and has a high deviation rate. After the handrail frame is placed, the clamping mechanism in the fixture is controlled to clamp it. The finished handrail frame after welding and assembly needs to be manually released from the clamp and unloaded, which is time-consuming and labor-intensive.

[0005] This invention provides an automatic positioning handrail frame welding fixture, specifically comprising: a fixture support, an inner platform groove formed above the fixture support, a positioning servo motor installed inside the inner platform groove, the positioning servo motor connected to and driving a rotary welding table, six handrail frame positioning platforms movably mounted on the rotary welding table, a frame rod limiting seat fixedly connected to the inner end of the upper surface of the handrail frame positioning platform, a telescopic guide block slidably connected to the bottom of the handrail frame positioning platform, a guide block push rod fixedly connected to the outer end of the telescopic guide block, and a guide block push rod rotatably mounted on the guide block push rod via a bearing. The tooling support is equipped with an arc-shaped linkage track mounted on the top of the wheel via a bracket. The guide push wheel is rotatably connected to the arc-shaped linkage track. A round-headed centering push block is fixedly connected to the upper end of the guide block push rod. Two side push frames are movably connected above the handrail frame positioning platform. A push frame guide plate is fixedly connected below the side push frame. The push frame guide plate is slidably connected to the telescopic guide block. A rod side clamp plate and a round-headed side clamp plate are fixedly connected above the side push frame. An inclined push frame groove is opened on the side push frame. Two linkage guide rods are fixedly connected above the handrail frame positioning platform. The linkage guide rods are slidably connected inside the push frame groove.

[0006] Furthermore, the bottom of the armrest frame positioning platform is provided with a balance adjustment platform, a balance guide rod is slidably connected below the balance adjustment platform, a balance push plate is fixedly connected to the lower end of the balance guide rod, a balance push spring is fixedly connected between the balance push plate and the balance adjustment platform, and a balance support wheel is rotatably connected to the lower surface of the balance push plate.

[0007] Furthermore, a horizontal directional ring is fixedly connected inside the inner platform groove by a bracket. The horizontal directional ring has two tilting inclined plates through bending processing. The balance support wheel is rolledly connected to the upper surface of the horizontal directional ring.

[0008] Furthermore, the two ends of the arc-shaped linkage track extend into a constriction track, and the inner surfaces of the arc-shaped linkage track and the constriction track are arc-shaped structures.

[0009] Furthermore, a positioning platform connecting shaft is fixedly connected to one end of the handrail frame positioning platform facing the center of the rotary welding platform. The positioning platform connecting shaft is rotatably connected to the rotary welding platform through a bearing. Two guide plate through holes are longitudinally opened in the handrail frame positioning platform.

[0010] Furthermore, a lower guide seat is installed below the positioning platform of the handrail frame by screws, and two retractable guide rods are installed below the lower guide seat by screws. Two reset springs are fixedly connected to the bottom of the lower guide seat, and the other end of the reset springs is fixedly connected to the telescopic guide block.

[0011] Furthermore, the telescopic guide block has a transverse sliding groove extending through it, and a radial sliding groove is provided above the telescopic guide block, with the radial sliding groove slidably connected to the retractable guide rod.

[0012] Furthermore, the upper half of the pusher guide plate moves through the guide plate opening, and the lower half of the pusher guide plate is slidably connected in the transverse groove.

[0013] Furthermore, the upper end of the skeleton rod limiting seat is bent to form a limiting flange, and limiting side rods are fixedly connected to both sides of the bottom of the skeleton rod limiting seat.

[0014] Furthermore, both the rod-side clamp and the round-head side clamp have an "L" shaped structure, and the round-head side clamp has an arc-shaped structure.

[0015] This invention provides an automatic positioning welding fixture for handrail frames, which has the following advantages:

[0016] The handrail frame welding fixture of this invention is used for welding the rotating base shell and support rod parts of the automotive handrail frame. It features a rotatable rotary welding table that supports six sets of handrail frame positioning tables. These positioning tables can be used to place and fix six sets of handrail frames. During loading, the rotating base shell and support rod are manually placed above the handrail frame positioning tables, with the mating ends of the support rods facing the rotating base shell. Precise alignment and alignment are not required, nor is it necessary to control the fixture to clamp the workpiece. As the rotary welding table rotates backward under the drive of the shifting servo motor, the guide rollers and the retraction rail... The guide wheel contacts and forms a rolling connection. After entering the arc-shaped linkage track, the telescopic guide block is pushed towards the center of the rotary welding table by the limiting of the arc-shaped linkage track. The round-headed centering push block pushes the cylindrical rotating base shell towards the center of the handrail frame positioning table, so that it fits with the arc edge of the support rod end. At the same time, as the push frame inclined groove and the linkage guide rod slide together, the side push frame is pushed towards the center of the handrail frame positioning table. The support rod and the rotating base shell are fixed and aligned by the rod side clamp and the round-head side clamp respectively. The automatic docking, alignment and fixation of the support rod and the rotating base shell are realized without manual operation, saving time and effort.

[0017] Furthermore, the handrail frame positioning platform in this invention is installed in a rotary welding station. As the rotary welding station rotates, the bottom of the handrail frame positioning platform remains horizontal through a rolling connection between a balance support wheel and a horizontal directional ring. When the handrail frame positioning platform moves to a position close to the welding robot, the balance support wheel rolls into a tilting ramp and tilts with the ramp's inclined structure, causing the handrail frame positioning platform to rotate and automatically flip the side of the car handrail frame towards the welding robot. This allows the welding robot to perform welding more quickly and accurately. Compared with existing fixed welding fixtures, this invention features a unit-type workpiece flipping function, which allows the workpiece to flip in conjunction with the rotation of the fixture, avoiding welding dead angles and incomplete welds caused by the orientation of the handrail frame. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram:

[0021] Figure 1 A schematic diagram of the overall structure of this application is shown;

[0022] Figure 2 This shows a schematic diagram of the structure behind the tooling support of this application;

[0023] Figure 3 This application shows Figure 2 A top-view structural diagram;

[0024] Figure 4 This invention provides a schematic diagram of the internal structure of the internal platform groove.

[0025] Figure 5 A schematic diagram of the structure of the horizontal orientation ring of this application is shown;

[0026] Figure 6 A schematic diagram of the arc-shaped linkage track of this application is shown;

[0027] Figure 7 A schematic diagram of the bottom structure of the rotary welding station of this application is shown;

[0028] Figure 8 A schematic diagram of the structure at the bottom of the armrest frame positioning platform of this application is shown;

[0029] Figure 9 This application shows a schematic diagram of the structure above the armrest frame positioning platform;

[0030] Figure 10 This diagram shows the structure of the round-head centering push block and the side push frame of this application when they are fixed to the handrail frame;

[0031] Figure 11 This application shows Figure 10 The above is a structural diagram;

[0032] Figure 12 This diagram shows the structure of the telescopic guide block when it is separated from the side pusher frame.

[0033] Figure 13 A schematic diagram of the armrest frame positioning platform of this application is shown;

[0034] Figure 14 This application shows Figure 4A magnified structural diagram of point A in the middle;

[0035] Figure 15 This application shows Figure 4 A magnified structural diagram of a portion of point B in the middle.

[0036] Figure label:

[0037] 1. Tooling support; 101. Inner platform groove; 103. Horizontal directional ring; 104. Tilting ramp; 105. Arc-shaped linkage rail; 106. Retractable rail; 2. Positioning servo motor; 3. Rotary welding table; 4. Handrail frame positioning table; 401. Positioning table coupling; 402. Linkage guide rod; 403. Guide plate through-hole; 404. Lower guide seat; 405. Retractable guide rod; 406. Return spring; 5. Frame rod limiting seat; 501. Limiting fold 502. Limiting edge rod; 6. Balance adjustment platform; 601. Balance push plate; 602. Balance guide rod; 603. Balance push spring; 604. Balance support wheel; 7. Telescopic guide block; 701. Transverse slide groove; 702. Radial slide groove; 703. Guide block push rod; 704. Guide push wheel; 8. Round head centering push block; 9. Side push frame; 901. Push frame inclined groove; 902. Rod body side clamp; 903. Round head side clamp; 904. Push frame guide plate. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figures 1 to 15 :

[0040] This invention proposes an automatic positioning handrail frame welding fixture, comprising: a fixture support 1, an inner platform groove 101 on the upper part of the fixture support 1, a shifting servo motor 2 installed inside the inner platform groove 101, the shifting servo motor 2 connected to and driving a rotary welding table 3, six handrail frame positioning tables 4 movably mounted on the rotary welding table 3, a frame rod limiting seat 5 fixedly connected to the inner end of the upper surface of the handrail frame positioning table 4, a telescopic guide block 7 slidably connected to the bottom of the handrail frame positioning table 4, a guide block push rod 703 fixedly connected to the outer end of the telescopic guide block 7, a guide push wheel 704 rotatably mounted on the guide block push rod 703 via a bearing, and an arc-shaped linkage track 105 mounted on the upper part of the fixture support 1 via a bracket. The guide pusher 704 is rolled and connected to the arc-shaped linkage track 105. The upper end of the guide block push rod 703 is fixedly connected to the round-headed centering push block 8. The upper part of the handrail frame positioning platform 4 is movably connected to the two side push frames 9. The lower part of the side push frame 9 is fixedly connected to the push frame guide plate 904. The push frame guide plate 904 is slidably connected to the telescopic guide block 7. The upper part of the side push frame 9 is fixedly connected to the rod side clamp plate 902 and the round-headed side clamp plate 903. The side push frame 9 is inclinedly provided with a push frame inclined groove 901. The upper part of the handrail frame positioning platform 4 is fixedly connected to the two linkage guide rods 402. The linkage guide rods 402 are slidably connected inside the push frame inclined groove 901. The rotating base shell and support rod are placed through the handrail frame positioning platform 4. Under normal conditions, the return spring is used to... 406. The telescopic guide block 7 is pulled away from the center of the rotary welding table 3. The round-headed centering push block 8 and the side push frame 9 are located at the edge of the handrail frame positioning table 4, leaving sufficient space for the placement of the rotating base shell and the support rod. During loading, the rotating base shell and the support rod are manually placed above the handrail frame positioning table 4, so that the mating end of the support rod faces the rotating base shell. As the rotary welding table 3 rotates backward under the drive of the shifting servo motor 2, the guide push wheel 704 contacts the retraction track 106 and forms a rolling connection. After the guide push wheel 704 enters the arc-shaped linkage track 105, the telescopic guide block 7 is moved towards the center of the rotary welding table 3 by the limiting of the arc-shaped linkage track 105. The pusher 8 pushes the cylindrical rotating base shell towards the center of the handrail frame positioning platform 4, making it fit against the arc edge of the support rod end. At the same time, the sliding connection between the pusher groove 901 and the linkage guide rod 402 pushes the side pusher 9 towards the center of the handrail frame positioning platform 4. The support rod and the rotating base shell are fixed and aligned by the rod side clamp 902 and the round head side clamp 903 respectively, realizing the automatic docking, alignment and fixation of the support rod and the rotating base shell. Compared with the existing handrail frame welding fixture, there is no need for manual precise placement and alignment of the handrail frame, and the operation of the positioning mechanism in the control fixture to clamp the handrail frame is also omitted, making the centering and positioning effect more accurate and the loading and unloading efficiency higher.

[0041] In this embodiment, the two ends of the arc-shaped linkage track 105 extend in a straight line with a retractable track 106. The inner surfaces of the arc-shaped linkage track 105 and the retractable track 106 are arc-shaped structures. By setting the retractable track 106, the guide push wheel 704 contacts and rolls with the retractable track 106 before rotating into the arc-shaped linkage track 105. As the retractable track 106 gradually enters the arc-shaped linkage track 105, the guide push wheel 704 is slowly pushed towards the center of the rotary welding table 3, which slowly triggers the clamping structure to clamp and fix the handrail frame. When the handrail frame enters the welding area, it is fixed above the handrail frame positioning table 4. When it leaves the welding area, the guide push wheel 704 disengages from the arc-shaped linkage track 105, and the telescopic guide block 7 moves outward under the retraction action of the reset spring 406, slowly releasing the clamping and fixing of the handrail frame.

[0042] In this embodiment, a positioning platform shaft 401 is fixedly connected to one end of the handrail frame positioning platform 4 facing the center of the rotary welding platform 3. The positioning platform shaft 401 is rotatably connected to the rotary welding platform 3 via bearings. Two guide plate through-holes 403 are longitudinally provided in the handrail frame positioning platform 4. A lower guide seat 404 is installed below the handrail frame positioning platform 4 by screws. Two retractable guide rods 405 are installed below the lower guide seat 404 by screws. Two return springs 406 are fixedly connected to the bottom of the lower guide seat 404. The other end of the return spring 406 is fixedly connected to the telescopic guide block 7. A transverse groove 701 is provided transversely through the telescopic guide block 7. A radial groove 702 is provided above the telescopic guide block 7. The radial groove 702 is slidably connected to the retractable guide rods 405. The sliding connection between the radial groove 702 and the retractable guide rods 405 serves as a guide, and the return springs 406 keep the telescopic guide block 7 taut.

[0043] In this embodiment, the upper half of the pusher guide plate 904 moves through the guide plate through-hole 403, and the lower half of the pusher guide plate 904 is slidably connected in the transverse slide groove 701. With the cooperation of the pusher inclined groove 901 and the linkage guide rod 402, when the side pusher 9 moves linearly in the radial direction of the rotary welding table 3 under the push of the telescopic guide block 7, it can drive the side pusher 9 to move in the direction of the pusher guide plate 904, thereby realizing the synchronous clamping of the side of the handrail frame.

[0044] In this embodiment, the upper end of the frame rod limiting seat 5 is bent to form a limiting flange 501, and the bottom two sides of the frame rod limiting seat 5 are fixedly connected to limiting side rods 502. The rod side clamping plate 902 and the round head side clamping plate 903 are both L-shaped structures, and the round head side clamping plate 903 is arc-shaped. When the side pusher 9 moves linearly in the radial direction of the rotary welding table 3 under the push of the telescopic guide block 7, it can drive the side pusher 9 to move in the direction of the pusher guide plate 904. At the same time, the rod side clamping plate 902 and the round head side clamping plate 903 above the two side pushers 9 move synchronously towards the center of the side pusher 9, and synchronously clamp and center the car armrest frame rotating base shell and support rod above the armrest frame positioning platform 4.

[0045] In Example 2, based on Example 1, a balance adjustment platform 6 is provided at the bottom of the handrail frame positioning platform 4. A balance guide rod 602 is slidably connected below the balance adjustment platform 6. A balance push plate 601 is fixedly connected to the lower end of the balance guide rod 602. A balance push spring 603 is fixedly connected between the balance push plate 601 and the balance adjustment platform 6. A balance support wheel 604 is rotatably connected to the lower surface of the balance push plate 601. A horizontal directional ring 103 is fixedly connected to the inner platform groove 101 through a bracket. The horizontal directional ring 103 has two tilting inclined plates 104 formed by bending. The balance support wheel 604 is rotatably connected to the upper surface of the horizontal directional ring 103. Under normal conditions, the balance support wheel 604 and the horizontal directional ring 103 are connected to each other. The rolling connection of the ring 103 maintains the balance of the handrail frame positioning platform 4, ensuring that the handrail frame positioning platform 4 is always parallel to the horizontal directional ring 103. When the handrail frame positioning platform 4 moves to the position of the tilting ramp 104 along with the rotary welding table 3, the balance guide rod 602 retracts to balance the push plate 601, compressing the balance push spring 603. The balance support wheel 604 engages with the tilting ramp 104, causing the handrail frame positioning platform 4 to rotate to an angle parallel to the tilting ramp 104. This achieves the rotational reversal of the workpiece, making the side of the handrail frame face the welding robot, giving the welding robot a larger operating angle and avoiding welding dead angles due to the fixed orientation of the handrail frame.

[0046] The working principle of this embodiment: The intelligent welding robot is located behind the tooling support 1. During the welding and assembly of the rotating base shell and support rod in the car armrest frame, the pneumatic positioning servo motor 2 drives the rotary welding table 3 to rotate counterclockwise intermittently, with a single rotation angle of 60 degrees. The rotating base shell and support rod are manually placed on the armrest frame positioning table 4, so that the cylindrical rotating base shell is located at the outer edge of the armrest frame positioning table 4, and the support rod is located in the middle of the armrest frame positioning table 4, with the arc-shaped interface of the support rod facing the rotating base shell. As the rotary welding... Platform 3 rotates counterclockwise, causing the guide pusher 704 at that position to contact the retractable track 106, and slowly enters the arc-shaped linkage track 105 along the retractable track 106. During this process, the guide pusher 704 moves towards the center of the rotary welding platform 3, causing the telescopic guide block 7 to slide. The telescopic guide block 7 drives the round-headed centering pusher 8 to push the cylindrical rotating base shell towards the center of the handrail frame positioning platform 4, so that it fits against the arc-shaped edge of the support rod end. As the telescopic guide block 7 moves, it drives the side pusher 9 to move towards the center of the rotary welding platform 3. Under the sliding connection between the pusher inclined groove 901 and the linkage guide rod 402, the side pusher 9 moves towards the center of the rotary welding platform 3. The square pusher 9 moves towards the center of the handrail frame positioning platform 4. Through the cooperation of the rod side clamp 902, the round head side clamp 903, and the round head centering push block 8, the support rod is fixed and aligned with the rotating base shell, achieving automatic docking, alignment, and fixation of the support rod and the rotating base shell. When the handrail frame positioning platform 4 moves to the right side of the intelligent welding robot, the balance support wheel 604 contacts the tilting ramp 104, causing the handrail frame positioning platform 4 to rotate at a certain angle, so that the side of the car handrail frame above the handrail frame positioning platform 4 faces the welding robot. The welding robot then welds the joint of the handrail frame, while simultaneously welding the joint located to the left of the welding robot. The inclined weld seam above the handrail frame positioning platform 4 in the tilting plate 104 is welded. The handrail frame in the handrail frame positioning platform 4 located in front of the welding robot is welded. With the continuous intermittent movement of the rotary welding table 3, the handrail frame is cyclically welded and assembled. The welded handrail frame is conveyed from the left to the front as the rotary welding table 3 rotates, and the guide push wheel 704 is disengaged from the arc linkage track 105. The telescopic guide block 7 is reset under the tension of the reset spring 406. The round head centering push block 8 and the side push frame 9 automatically move away from the handrail frame, making it easy for the finished handrail frame to be manually collected.

[0047] The following points should be noted in this article:

[0048] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0049] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0050] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An automatic positioning welding fixture for handrail frames, comprising: A tooling support (1) is provided above the tooling support (1), and an inner platform groove (101) is provided above the inner platform groove (101). A shifting servo motor (2) is installed inside the inner platform groove (101). The shifting servo motor (2) is connected to and drives a rotary welding table (3). The rotary welding table (3) is characterized in that six handrail frame positioning tables (4) are movably installed on the rotary welding table (3). A frame rod limiting seat (5) is fixedly connected to the inner end of the upper surface of the handrail frame positioning table (4). A telescopic guide block (7) is slidably connected to the bottom of the handrail frame positioning table (4). The outer end is fixedly connected to a guide block push rod (703), and the guide block push rod (703) is rotatably mounted with a guide push wheel (704) via a bearing. An arc-shaped linkage rail (105) is mounted above the tooling support (1) via a bracket. The guide push wheel (704) is rotatably connected to the arc-shaped linkage rail (105). A round-headed centering push block (8) is fixedly connected to the upper end of the guide block push rod (703). Two side push frames (9) are movably connected above the handrail frame positioning platform (4). A push frame guide plate (90) is fixedly connected below the side push frames (9). 4) The push frame guide plate (904) is slidably connected to the telescopic guide block (7). The side push frame (9) is fixedly connected with the rod side clamp plate (902) and the round head side clamp plate (903). The side push frame (9) is inclinedly provided with a push frame groove (901). The handrail frame positioning platform (4) is fixedly connected with two linkage guide rods (402). The linkage guide rods (402) are slidably connected inside the push frame groove (901). The handrail frame positioning platform (4) is provided with a balance adjustment platform (6) at the bottom. The balance adjustment platform (6) is slidably connected with a balance guide rod. The lower end of the rod (602) is fixedly connected to the balance push plate (601), and the balance push plate (601) is fixedly connected to the balance adjustment table (6). The lower surface of the balance push plate (601) is rotatably connected to the balance support wheel (604). The inner platform groove (101) is fixedly connected to the horizontal directional ring (103) by the bracket. The horizontal directional ring (103) is bent to have two tilting inclined plates (104). The balance support wheel (604) is rotatably connected to the upper surface of the horizontal directional ring (103).

2. The automatic positioning handrail frame welding fixture according to claim 1, characterized in that, The two ends of the arc-shaped linkage track (105) extend into a constriction track (106), and the inner surfaces of the arc-shaped linkage track (105) and the constriction track (106) are arc-shaped structures.

3. The automatic positioning handrail frame welding fixture according to claim 1, characterized in that, The end of the handrail frame positioning platform (4) facing the center of the rotary welding platform (3) is fixedly connected to the positioning platform connecting shaft (401). The positioning platform connecting shaft (401) is rotatably connected to the rotary welding platform (3) through the bearing. The handrail frame positioning platform (4) has two guide plate through holes (403) longitudinally.

4. The automatic positioning handrail frame welding fixture according to claim 3, characterized in that, The lower guide seat (404) is installed below the positioning platform (4) of the handrail frame by screws. Two retractable guide rods (405) are installed below the lower guide seat (404) by screws. Two reset springs (406) are fixedly connected to the bottom of the lower guide seat (404). The other end of the reset spring (406) is fixedly connected to the telescopic guide block (7).

5. The automatic positioning handrail frame welding fixture according to claim 4, characterized in that, The telescopic guide block (7) has a transverse groove (701) extending through it, and a radial groove (702) is provided above the telescopic guide block (7). The radial groove (702) is slidably connected to the retractable guide rod (405).

6. The automatic positioning handrail frame welding fixture according to claim 5, characterized in that, The upper half of the pusher guide plate (904) moves through the guide plate opening (403), and the lower half of the pusher guide plate (904) is slidably connected in the transverse groove (701).

7. The automatic positioning handrail frame welding fixture according to claim 1, characterized in that, The upper end of the skeleton rod limiting seat (5) is bent to form a limiting flange (501), and the bottom two sides of the skeleton rod limiting seat (5) are fixedly connected to limiting side rods (502).

8. The automatic positioning handrail frame welding fixture according to claim 1, characterized in that, Both the rod-side clamp (902) and the round-headed side clamp (903) have an "L" shaped structure, and the round-headed side clamp (903) has an arc-shaped structure.

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