Automatic welding production line for round tube and sleeve

Abstract

The application discloses a kind of automatic welding production line of round tube and bush, it is related to welding production line technical field, including round tube conveying line, bore assembly being arranged at the end of first conveying branch line and second conveying branch line, chip suction assembly being arranged at the other end of second conveying branch line, and welding assembly being arranged at the both ends of third conveying branch line, it is laterally transferred round tube between adjacent conveying branch line;The technical advantage of the application is: by setting round tube conveying line and round tube transfer line vertically and horizontally, first air cylinder is arranged at the both ends of transfer frame, barb is arranged at the end of transfer frame upward, efficient transfer is realized in the way of height difference between bore assembly, chip suction assembly and welding assembly;By setting pneumatic chuck, rotary drive part and welding locking piece, the circumferential rotation control of round tube is realized, by setting bushing box and bushing positioning structure, automatic taking of bushing is realized, and then full-automatic welding of round tube and bushing is realized, and welding efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of welding production line technology, and in particular to an automatic welding production line for round tubes and bushings. Background Technology

[0002] Welding between round tubes and bushings is a crucial process for achieving force transmission, motion guidance, and structural fixation between components, and is widely used in key equipment such as automotive transmission systems, hydraulic devices in construction machinery, and machine tool spindle assemblies. Round tubes, as common hollow structural components, are lightweight and rigid, and are often used as force or torque transmission carriers. Bushings, on the other hand, are mostly annular precision parts that serve to reduce friction, provide positioning and guidance, or offer sealing protection. The welding quality of both directly affects the overall assembly accuracy, load-bearing capacity, and service life.

[0003] Currently, both ends of the round tube require welding of bushings, but the transport of the round tube still relies on manual operation, which is not only time-consuming and labor-intensive, but also makes it difficult to ensure the consistency of transport positioning, directly affecting the stability of subsequent welding processes. If a production line is used for bushing welding of the round tube, a boring machine needs to be added to the production line to pre-treat the round tube in order to improve the welding quality. However, if the residual debris after pre-treatment is not cleaned up in time, it will affect the subsequent welding quality and the cleanliness of the environment. Moreover, in the production line, multiple welding machines and boring equipment are scattered and occupy a large area, making it difficult to optimize and integrate the round tube transport path, resulting in poor connection between various processes. Ultimately, this leads to low overall welding efficiency, which cannot meet the needs of large-scale production. Summary of the Invention

[0004] This device provides an automatic welding production line for round tubes and bushings, the specific implementation of which is as follows:

[0005] An automated welding production line for round tubes and bushings includes:

[0006] A circular tube conveying line for axially conveying circular tubes includes a first conveying branch line, a second conveying branch line, and a third conveying branch line arranged in parallel, with the circular tubes being laterally transferred between adjacent conveying branch lines via a circular tube transfer line.

[0007] A boring assembly is respectively located at the ends of the first conveying branch and the second conveying branch, and the boring assembly is provided with a first gripping conveying assembly for guiding the round tube.

[0008] The chip suction assembly is located at the other end of the second conveying branch line. The chip suction assembly includes a mounting box and a bag cage and a chip suction machine located at the air extraction end of the mounting box. The air extraction front end of the mounting box is provided with a sealing sleeve for inserting a round tube, and the outer side of the sealing sleeve is provided with a second clamping positioning member that locks the round tube after it is inserted.

[0009] Welding assemblies are located at both ends of the third conveying branch line. The welding assemblies have built-in bushing boxes. The round pipes on the third conveying branch line are fed into the welding assemblies by the second gripping conveying assembly and automatically welded to the bushings.

[0010] Based on the above technical solutions, in order to achieve efficient flow of round tubes in the processing flow, a longitudinal and transverse layout design was adopted. Through the longitudinal round tube conveying line and the transverse round tube transfer line, a closed-loop material transfer network covering the entire process of boring, chip cleaning and welding was constructed.

[0011] Preferably, the first conveying branch, the second conveying branch, and the third conveying branch have the same structure. Taking the first conveying branch as an example, it is provided with a lifting base at its bottom, and a number of V-shaped drive wheels are provided at equal intervals along its length at the top of the first conveying branch. Each V-shaped drive wheel is connected to a first drive motor through a sprocket and chain drive.

[0012] Preferably, the circular tube transfer line includes a first transfer frame disposed between the first and second conveying branches, and a second transfer frame disposed between the second and third conveying branches. Both ends of the first and second transfer frames are vertically provided with first cylinders, and both ends are provided with barbs at the gap between adjacent V-shaped drive wheels.

[0013] Based on the above technical solutions, this "height difference adaptation" transfer mode, through the three-dimensional interlacing and height difference transfer design in both directions, eliminates the need to occupy additional ground space to lay long conveyor tracks. The boring components, chip suction components, and welding components are arranged in a staggered and compact manner, which increases the overall equipment installation space utilization rate by more than 30% and further enhances the production adaptability of the production line.

[0014] Preferably, the first gripping and conveying assembly and the second gripping and conveying assembly have the same structure. Taking the first gripping and conveying assembly as an example, it includes a third vertical plate and a second translation structure disposed on the third vertical plate. The output end of the second translation structure is connected to a translation block. The translation block is provided with a pair of first V-shaped blocks that are engaged in reverse linkage through a gear and rack. The V-shaped openings of the pair of first V-shaped blocks act inward on the circular tube, and any one of the first V-shaped blocks is connected to the air arm end of the third cylinder.

[0015] Preferably, the boring assembly includes a first base, the rear end of the first base is provided with a first translation structure and a boring machine, and the front end of the first base is provided with a first clamping positioning component.

[0016] Preferably, the front end of the boring assembly is provided with a second positioning member, and the front end of the welding assembly is provided with a first positioning member. Both the first positioning member and the second positioning member are cylinder-driven baffle structures.

[0017] Based on the above technical solutions, a boring assembly and a chip removal assembly were set up. By performing a progressive treatment of "pre-processing + deep cleaning" on both ends of the round tube, the optimal working conditions were created for the subsequent welding process. After the boring process is completed, the chip removal assembly is immediately activated, and the iron filings and debris generated during the boring process are quickly removed by negative pressure adsorption.

[0018] Preferably, the welding assembly includes a second base body with a welding position. A pneumatic chuck is rotatably mounted on the front end of the welding position via a first vertical plate. The pneumatic chuck is connected to a rotation drive unit and a welding locking component. The welding assembly also includes an induction coil, a bushing positioning structure that slides at the rear end of the welding position, a bushing box located on the side of the welding position, and a welding torch structure located at the top of the welding position. The bushing box is connected to a longitudinal and transverse movement structure.

[0019] Preferably, a second motor is provided on the first vertical plate, and a first external gear ring is provided on the outside of the pneumatic chuck. The output end of the second motor is connected to the first external gear ring through a drive gear.

[0020] Preferably, the welding locking component includes a fourth cylinder and a rack disposed on the first vertical plate, one end of the rack being hinged to the first vertical plate, and the other end of the rack being connected to the arm end of the fourth cylinder.

[0021] The pneumatic chuck is equipped with a second external toothed ring, and the rack is actively engaged with the second external toothed ring.

[0022] Preferably, the welding torch structure includes a second vertical plate, a fourth translational structure, and a vertical movement structure, with the combined output end of the fourth translational structure and the vertical movement structure connected to a gas shielded torch head.

[0023] Based on the above technical solutions, in order to achieve fully automated operation of the welding process between the round tube and the bushing, a combination structure of "pneumatic chuck + rotation drive unit + welding locking component" is adopted for the circumferential rotation control of the round tube. The pneumatic chuck adopts a six-jaw self-centering design and is equipped with a pneumatic control valve group, which can automatically adjust the opening and closing amplitude of the jaws according to the diameter of the round tube. The welding locking component works with the pneumatic chuck to form a fixed position, effectively preventing radial runout of the round tube during rotation welding and ensuring the accuracy of the welding trajectory.

[0024] In summary, this application includes the following beneficial technical effects:

[0025] 1. This invention achieves efficient transfer of round tubes between the boring assembly, chip suction assembly, and welding assembly by setting up round tube conveying lines and round tube transfer lines in both directions, with a first cylinder at both ends of the transfer frame and a barb at the end of the transfer frame. This achieves efficient transfer of round tubes between the boring assembly, chip suction assembly, and welding assembly by means of height difference, realizes efficient utilization of installation space, and greatly improves the operation efficiency of the production line.

[0026] 2. This invention improves the quality and environmental cleanliness of subsequent welding between the round tube and the bushing by setting up a boring assembly and a chip removal assembly to pre-treat both ends of the round tube sequentially.

[0027] 3. The present invention has a simple structure. By setting a pneumatic chuck, a rotation drive unit and a welding locking component, the circumferential rotation control of the round tube is realized. By setting a bushing box and a bushing positioning structure, the automatic picking of the bushing is realized, thereby realizing the fully automatic welding of the round tube and the bushing and improving the welding efficiency. Attached Figure Description

[0028] Figure 1 This is a side view of the structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the attached structure of the present invention;

[0030] Figure 3 This is a side view of the circular tube conveying line and the circular tube transfer line in this invention.

[0031] Figure 4 This is a right-side structural schematic diagram of the circular tube conveying line and the circular tube transfer line in this invention;

[0032] Figure 5 This is a schematic diagram of the structure of the first conveying branch and the boring assembly in this invention;

[0033] Figure 6 This is a schematic diagram of the structure of the second conveying branch, the boring assembly, and the chip suction assembly in this invention;

[0034] Figure 7 This is a schematic diagram of the structure of the third conveying branch and welding assembly in this invention;

[0035] Figure 8 This is a side view of the boring assembly in this invention.

[0036] Figure 9 This is a schematic diagram of the structure of the first gripping and conveying component in this invention;

[0037] Figure 10 This is a side view of the chip removal assembly in this invention.

[0038] Figure 11 This is a front structural diagram of the welding assembly in this invention;

[0039] Figure 12 This is a schematic diagram of the back structure of the welding assembly in this invention;

[0040] Figure 13 This is a schematic diagram of the back structure of the pneumatic chuck in this invention. Figure 1 ;

[0041] Figure 14 This is a schematic diagram of the back structure of the pneumatic chuck in this invention. Figure 2 ;

[0042] Figure 15 This is a schematic diagram of the front structure of the pneumatic chuck in this invention;

[0043] Figure 16 This is a partial structural diagram of the welding assembly in this invention. Figure 1 ;

[0044] Figure 17 This is a partial structural diagram of the welding assembly in this invention. Figure 2 ;

[0045] Figure 18 This is a partial structural diagram of the welding assembly in this invention. Figure 3 .

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Circular tube conveyor line; 2. Circular tube transfer line; 3. Boring assembly; 4. Chip suction assembly; 5. Welding assembly; 6. First gripping and conveying assembly; 7. Second gripping and conveying assembly; 8. First positioning component; 9. Second positioning component; 10. Bushing.

[0048] 101. First conveyor branch line; 102. Second conveyor branch line; 103. Third conveyor branch line; 104. First drive motor; 105. Lifting base; 106. V-shaped drive wheel; 107. V-shaped lifting structure.

[0049] 201. First transfer frame; 202. Second transfer frame; 203. First cylinder; 204. Barrel.

[0050] 301. First base body; 302. First translation structure; 303. Boring machine; 304. First clamping and positioning component.

[0051] 401. Housing assembly; 402. Chip suction machine; 403. Bag cage; 404. Sealing sleeve; 405. Second clamp positioning component.

[0052] 501. Bushing positioning structure; 502. Welding torch structure; 503. Induction coil; 504. Pneumatic chuck; 505. Welding locking component; 506. First vertical plate; 507. Second motor; 508. Bushing box; 509. Second base.

[0053] 601. Third vertical plate; 602. Second translation structure; 603. Translation block; 604. Third cylinder; 605. First V-shaped block.

[0054] 3041, Second cylinder; 3042, Second V-block;

[0055] 5011, Central positioning axis; 5012, Third translation structure.

[0056] 5021, Second vertical plate; 5022, Fourth translational structure; 5023, Vertical translational structure; 5024, Gas-operated gun head.

[0057] 5041, First external gear ring; 5042, Second external gear ring.

[0058] 5051, fourth cylinder; 5052, rack and pinion.

[0059] 5071, Drive gear,

[0060] 5081. Use a notch; 5082. Longitudinal and transverse moving structure. Detailed Implementation

[0061] The specific embodiments of the present invention are described below with reference to the accompanying drawings and examples:

[0062] It should be noted that the structures, proportions, sizes, etc. illustrated in the accompanying drawings of this specification are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0063] Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity of description and are not intended to limit the scope of the invention. Any changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0064] The following is in conjunction with the appendix Figure 1-18 This application will be described in further detail.

[0065] This application discloses an automatic welding production line for round tubes and bushings.

[0066] Example 1: Refer to Figures 1 to 6 This embodiment discloses an automatic welding production line for round tubes and bushings, including...

[0067] The structure includes a circular tube conveying line 1 for axially conveying circular tubes, a boring assembly 3 located at the ends of the first conveying branch line 101 and the second conveying branch line 102, and a welding assembly 5 located at both ends of the third conveying branch line 103. The circular tube conveying line 1 includes the first conveying branch line 101, the second conveying branch line 102 and the third conveying branch line 103 arranged in parallel. The circular tubes are laterally transferred between adjacent conveying branches via a circular tube transfer line 2. In this structure, the circular tubes are sequentially transferred between adjacent first conveying branch lines 101, second conveying branch line 102 and third conveying branch line 103 via the circular tube transfer line 2.

[0068] The first conveying branch line 101, the second conveying branch line 102, and the third conveying branch line 103 have the same structure. Taking the first conveying branch line 101 as an example, it is provided with a lifting base 105 at its bottom. Several V-shaped drive wheels 106 are equidistantly arranged at the top of the first conveying branch line 101 along its length direction. Each V-shaped drive wheel 106 is connected to a first drive motor 104 through a sprocket and chain drive. In this structure, the lifting base 105 is a conventional lifting structure with motor-driven lead screw lifting. The center of the V-shaped drive wheel 106 is at a low position to prevent the round tube from shifting laterally during rotation.

[0069] The circular tube transfer line 2 includes a first transfer frame 201 located between the first conveying branch line 101 and the second conveying branch line 102, and a second transfer frame 202 located between the second conveying branch line 102 and the third conveying branch line 103. Both ends of the first transfer frame 201 and the second transfer frame 202 are vertically provided with first cylinders 203, and both ends are provided with barbs 204 at the gap between adjacent V-shaped drive wheels 106. In this structure, the first cylinders 203 on both sides of the first transfer frame 201 tilt the first transfer frame 201 through telescopic cylinders, thereby completing the lateral transfer of the circular tube, and the barbs 204 are used to prevent the circular tube from laterally overstepping.

[0070] Example 2: Refer to Figures 8 to 9 Based on the previous embodiment, this embodiment also discloses an automatic welding production line for round tubes and bushings. The boring assembly 3 is provided with a first gripping and conveying assembly 6 for introducing round tubes. The welding assembly 5 has a bushing box 508 inside. The round tube on the third conveying branch line 103 is fed into the welding assembly 5 through the second gripping and conveying assembly 7 and automatically welded to the bushing 10. In this structure, the two ends of the round tube are bored sequentially by the boring assembly 3 in order to improve the welding quality of the subsequent welding assembly 5.

[0071] The first gripping and conveying assembly 6 and the second gripping and conveying assembly 7 have the same structure. Taking the first gripping and conveying assembly 6 as an example, it includes a third vertical plate 601 and a second translation structure 602 disposed on the third vertical plate 601. The output end of the second translation structure 602 is connected to a translation block 603. In this structure, the translation block 603 is provided with a pair of first V-shaped blocks 605 that are linked in reverse by a gear and rack. The V-shaped openings of the pair of first V-shaped blocks 605 act inward on the round tube, and any one of the first V-shaped blocks 605 is connected to the arm end of the third cylinder 604.

[0072] The boring assembly 3 includes a first base 301. The rear end of the first base 301 is provided with a first translation structure 302 and a boring machine 303. The front end of the first base 301 is provided with a first clamping positioning member 304. The front end of the boring assembly 3 is provided with a second positioning member 9. The front end of the welding assembly 5 is provided with a first positioning member 8. The first positioning member 8 and the second positioning member 9 are both cylinder-driven baffle structures. In this structure, the first clamping positioning member 304 includes a pair of second cylinders 3041. The arms of the two second cylinders 3041 are provided with second V-shaped blocks 3042 facing inward. During boring, the V-faces of the two second V-shaped blocks 3042 clamp the round tube inward. The first positioning member 8 is used to mark the end position of the round tube before the welding assembly 5 is operated, so as to ensure accurate gripping by the subsequent second gripping and conveying assembly 7. Similarly, the second positioning member 9 is used to mark the end position of the round tube before the boring assembly 3 is operated.

[0073] Example 3: Reference Figure 1 and Figure 10 Based on the previous embodiment, this embodiment also discloses an automatic welding production line for round tubes and bushings, which further includes a chip suction assembly 4 located at the other end of the second conveying branch line 102. The chip suction assembly 4 includes a mounting box 401 and a bag cage 403 and a chip suction machine 402 located at the air extraction end inside the mounting box 401. The air extraction front end of the mounting box 401 is provided with a sealing sleeve 404 for inserting the round tube, and the outer side of the sealing sleeve 404 is provided with a second clamping positioning member 405 that locks the round tube after it is inserted. In this structure, the chip suction machine 402 and the bag cage 403 are conventional technical means in the art. After the sealing sleeve 404 is connected to the end of the round tube and the second clamping positioning member 405 clamps the round tube, the chip suction machine 402 sucks and cleans the debris inside the round tube from one side.

[0074] Example 4: Reference Figures 11 to 18Based on the previous embodiment, this embodiment also discloses an automatic welding production line for round tubes and bushings. The welding assembly 5 includes a welding torch structure 502, a second base 509, an induction coil 503, a bushing positioning structure 501 sliding at the rear end of the welding position, a bushing box 508 located on the side of the welding position, and a welding torch structure 502 located at the top of the welding position. In this structure, the bushing 10 is taken out of the bushing box 508 by the bushing positioning structure 501, and the induction coil 503 provides the corresponding temperature for welding. The bushing positioning structure 501 includes a third translation structure 5012 located on the second base 509. Structure 5012 is a motor lead screw structure. The output end of the third translation structure 5012 is provided with a central positioning shaft 5011 that can be inserted into the bushing box 508. The central positioning shaft 5011 is inserted into the inner side of the round tube to realize the clamping and picking of the round tube. The third conveying branch line 103 is provided with several V-shaped lifting structures 107 along its length direction. The V-shaped opening of the V-shaped lifting structure 107 is open upward, and the V-shaped lifting structure 107 and the V-shaped drive wheel 106 are arranged in a staggered manner. The V-shaped lifting structure 107 is used to lift the round tube of the third conveying branch line 103 to the picking height of the second gripping conveying component 7.

[0075] The second seat 509 has a welding position. A pneumatic chuck 504 is rotatably mounted on the front end of the welding position via the first vertical plate 506. The pneumatic chuck 504 is connected to a rotation drive unit and a welding locking component 505. A longitudinal and transverse movement structure 5082 is connected to the bottom of the bushing housing 508. The longitudinal and transverse movement structure 5082 is a motor screw structure. A second motor 507 is mounted on the first vertical plate 506. A first external gear ring 5041 is provided outside the pneumatic chuck 504. The output end of the second motor 507 is threaded to the first external gear ring 5041 via a drive gear 5071. Ring 5041, in this structure, the pneumatic chuck 504 is a conventional structure in the field. The pneumatic chuck 504 is clamped inward to the round tube. The second motor 507 drives the pneumatic chuck 504 and the round tube to rotate, thereby realizing the circumferential welding of the round tube and the bushing 10 at the abutment of the welding torch structure 502. The bushing box 508 has an inclined structure inside. Several bushings 10 are stacked on the upper part of the inclined surface. The bushing box 508 has a pick-up notch 5081 at the lower position. The central positioning shaft 5011 is inserted into the end of the bushing 10 through the pick-up notch 5081.

[0076] The welding locking component 505 includes a fourth cylinder 5051 and a rack 5052 mounted on the first vertical plate 506. One end of the rack 5052 is hinged to the first vertical plate 506, and the other end of the rack 5052 is connected to the arm end of the fourth cylinder 5051. The pneumatic chuck 504 is provided with a second external toothed ring 5042. The rack 5052 is actively engaged with the second external toothed ring 5042. In this structure, after the pneumatic chuck 504 and the round tube have rotated and before welding begins, the arm of the fourth cylinder 5051 extends, causing the rack 5052 to engage with the second external toothed ring 5042 to achieve circumferential locking of the pneumatic chuck 504 and the round tube, thereby improving the stability of the round tube during welding.

[0077] The welding torch structure 502 includes a second vertical plate 5021, a fourth translation structure 5022, and a vertical movement structure 5023. The combined output end of the fourth translation structure 5022 and the vertical movement structure 5023 is connected to a gas-shielded torch head 5024. In this structure, both the fourth translation structure 5022 and the vertical movement structure 5023 are motor-driven lead screw translation structures. The fourth translation structure 5022 and the vertical movement structure 5023 are used to achieve pre-adjustment of the welding position of the gas-shielded torch head 5024. The gas-shielded torch head 5024 includes a nozzle, a conductive tip, and a guide. The welding torch consists of components such as the nozzle holder and insulating sleeve. The nozzle is used to deliver protective gas to the welding area, preventing the welding wire tip, arc, and molten pool from contacting the air. The conductive tip is the channel through which the welding wire passes and also serves to conduct electricity. The conductive tip holder is used to fix the conductive tip. The insulating sleeve is used to prevent short circuits between the conductive parts and other parts of the torch body. During welding, active or inert protective gas is ejected from the welding torch body through the nozzle at the torch head, forming a protective cover at the nozzle opening. This keeps the welding wire and molten pool in a protective atmosphere that isolates them from the air, thereby ensuring welding quality.

[0078] The specific implementation process is as follows: After the round tube is processed by the external circular saw, it is axially moved to the boring assembly 3 through the first conveying branch line 101 to achieve boring of one end of the round tube; before boring, the second positioning member 9 is raised, the first conveying branch line 101 axially conveys the round tube, and after one end of the round tube abuts against the second positioning member 9, the first gripping conveying assembly 6 grips the round tube; after the second positioning member 9 is reset, the first gripping conveying assembly 6 sends the round tube into the boring assembly 3, and the first clamping positioning member 304 clamps the round tube during the actual boring;

[0079] After boring is completed, the first conveying branch 101 axially retracts the round tube, and the first transfer frame 201 feeds the round tube into the second conveying branch 102 by lifting and tilting. The boring assembly 3 bores the other end of the round tube on the second conveying branch 102. After pre-processing is completed, the round tube is fed into the chip suction assembly 4 through the second conveying branch 102. After the chip suction assembly 4 sucks out the iron chips, the second conveying branch 102 retracts the round tube.

[0080] The second transfer frame 202 feeds the round tube into the third conveying branch line 103 by lifting and tilting. The first positioning member 8 rises and the third conveying branch line 103 rotates so that the end of the round tube abuts against the first positioning member 8. The V-shaped lifting structure 107 lifts the round tube, and the second gripping conveying component 7 grips the round tube. After the first positioning member 8 is reset, the second gripping conveying component 7 feeds the round tube into the welding component 5 to realize the automatic welding of the round tube and the bushing 10. After the welding is completed, the round tube returns to its original position, and the above operation is repeated to complete the automatic welding of the other end.

[0081] Many other changes and modifications can be made without departing from the concept and scope of this invention. It should be understood that this invention is not limited to the specific embodiments, and the scope of this invention is defined by the appended claims.

Claims

1. An automatic welding production line for round tubes and bushings, characterized in that, include: A circular tube conveying line (1) for axial conveying of circular tubes includes a first conveying branch line (101), a second conveying branch line (102) and a third conveying branch line (103) arranged in parallel, and a circular tube is laterally transferred between adjacent conveying branches through a circular tube transfer line (2); A boring assembly (3) is respectively provided at the ends of the first conveying branch (101) and the second conveying branch (102). The boring assembly (3) is provided with a first gripping conveying assembly (6) for introducing the round tube. A chip suction assembly (4) is provided at the other end of the second conveying branch (102). The chip suction assembly (4) includes a mounting box (401) and a bag cage (403) and a chip suction machine (402) located at the air extraction end inside the mounting box (401). The air extraction front end of the mounting box (401) is provided with a sealing sleeve (404) for inserting a round tube, and the outer side of the sealing sleeve (404) is provided with a second clamping positioning member (405) that locks the round tube after it is inserted. Welding assemblies (5) are provided at both ends of the third conveying branch (103). The welding assembly (5) has a bushing box (508) inside. The round tube on the third conveying branch (103) is fed into the welding assembly (5) by the second gripping conveying assembly (7) and automatically welded to the bushing (10). The first conveying branch (101), the second conveying branch (102) and the third conveying branch (103) have the same structure. Taking the first conveying branch (101) as an example, it is provided with a lifting base (105) at its bottom. The top of the first conveying branch (101) is provided with a number of V-shaped drive wheels (106) at equal intervals along its length direction, and each V-shaped drive wheel (106) is connected to a first drive motor (104) through a sprocket and chain drive. The circular tube transfer line (2) includes a first transfer frame (201) disposed between the first transfer branch line (101) and the second transfer branch line (102), and a second transfer frame (202) disposed between the second transfer branch line (102) and the third transfer branch line (103). Both ends of the first transfer frame (201) and the second transfer frame (202) are provided with a first cylinder (203) vertically, and both ends are provided with barbs (204) at the gap between adjacent V-shaped drive wheels (106).

2. The automatic welding production line for round tubes and bushings according to claim 1, characterized in that, The first gripping and conveying component (6) and the second gripping and conveying component (7) have the same structure. Taking the first gripping and conveying component (6) as an example, it includes a third vertical plate (601) and a second translation structure (602) disposed on the third vertical plate (601). The output end of the second translation structure (602) is connected to a translation block (603). The translation block (603) is provided with a pair of first V-shaped blocks (605) that are engaged in reverse linkage with a gear and rack. The V-shaped openings of the pair of first V-shaped blocks (605) act inward on the round tube, and any one of the first V-shaped blocks (605) is connected to the arm end of the third cylinder (604).

3. The automatic welding production line for round tubes and bushings according to claim 1, characterized in that, The boring assembly (3) includes a first base (301), the rear end of the first base (301) is provided with a first translation structure (302) and a boring machine (303), and the front end of the first base (301) is provided with a first clamping positioning component (304).

4. The automatic welding production line for round tubes and bushings according to claim 1, characterized in that, The boring assembly (3) has a second positioning element (9) at its front end, and the welding assembly (5) has a first positioning element (8) at its front end. Both the first positioning element (8) and the second positioning element (9) are cylinder-driven baffle structures.

5. The automatic welding production line for round tubes and bushings according to claim 4, characterized in that, The welding assembly (5) includes a second base (509), on which a welding position is provided. A pneumatic chuck (504) is rotatably provided at the front end of the welding position via a first vertical plate (506). The pneumatic chuck (504) is connected to a rotation drive unit and a welding locking member (505). The welding assembly (5) further includes an induction coil (503), a bushing positioning structure (501) that slides at the rear end of the welding position, a bushing box (508) located on the side of the welding position, and a welding torch structure (502) located at the top of the welding position, and the bushing box (508) is connected to a longitudinal and transverse moving structure (5082).

6. The automatic welding production line for round tubes and bushings according to claim 5, characterized in that, The first vertical plate (506) is provided with a second motor (507), and the pneumatic chuck (504) is provided with a first external gear ring (5041) on the outside. The output end of the second motor (507) is connected to the first external gear ring (5041) through a drive gear (5071).

7. The automatic welding production line for round tubes and bushings according to claim 6, characterized in that, The welding locking component (505) includes a fourth cylinder (5051) and a rack (5052) disposed on the first vertical plate (506). One end of the rack (5052) is hinged to the first vertical plate (506), and the other end of the rack (5052) is connected to the arm end of the fourth cylinder (5051). The pneumatic chuck (504) is provided with a second external toothed ring (5042) on its outside, and the rack (5052) is actively engaged with the second external toothed ring (5042).

8. The automatic welding production line for round tubes and bushings according to claim 7, characterized in that, The welding torch structure (502) includes a second vertical plate (5021), a fourth translation structure (5022) and a vertical movement structure (5023), and the combined output end of the fourth translation structure (5022) and the vertical movement structure (5023) is connected to a gas shielded torch head (5024).

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