Multi-angle welding machine tool with automatic feeding function

Abstract

The invention discloses a multi-angle welding machine tool with an automatic feeding function, and particularly relates to the technical field of machine tool machining, the multi-angle welding machine tool comprises a machine tool base, and the top surface of the machine tool base is provided with a lifting supporting assembly used for bearing a round pipe workpiece. A round pipe workpiece is lifted by the lifting supporting assembly, so that the center of the round pipe workpiece and the midpoint of the rotating disc are collinear, the jacking rod is driven to ascend due to upward thrust generated by extrusion of the inclined face of the jacking block and the slope, and the maximum jacking height of the jacking rod is that the bottom face of the jacking block is flush with the top face of the machine tool base. After jacking, the circular pipe workpieces on the supporting platform are lifted to the height equal to the height of the middle point of the rotating disc, the two to-be-welded circular pipe workpieces are lifted at a time, then the two circular pipe workpieces are pushed by the moving seat to get close to the direction of the fixed seat, alignment welding of the circular pipe workpieces is facilitated, and the welding quality is improved.

Description

Technical Field

[0001] This invention relates to the field of machine tool processing technology, specifically to a multi-angle welding machine tool with automatic feeding function. Background Technology

[0002] Welding machine tools are equipment used for welding, which can realize automated, efficient and high-precision welding operations; they can reduce the labor intensity of workers and improve production efficiency; they can ensure welding quality and consistency. In order to reduce the labor burden of manual material loading by workers, welding machine tools with automatic material loading have appeared on the market, improving the mechanical efficiency of welding.

[0003] When welding round tube workpieces, it is usually necessary to manually align the workpieces that are delivered. However, manual alignment is time-consuming and requires repetitive operation for each welding operation, resulting in high labor intensity, high labor costs, and low automation. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-angle welding machine tool with automatic feeding function, so as to solve the problems mentioned in the background art, which require manual alignment of the conveyed workpieces, which need to be aligned every time welding, resulting in repetitive operation, high labor intensity, high labor costs, and low degree of automation.

[0005] The present invention can be achieved through the following technical solution: a multi-angle welding machine tool with automatic feeding function, including a machine tool base, a lifting support assembly for supporting round tube workpieces is provided on the top surface of the machine tool base, a fixed seat fixed to the top surface of the machine tool base and a movable seat sliding on the machine tool base are respectively provided on both sides of the lifting support assembly, and a rotating disk is rotatably installed on the inner side of the top of the movable seat and the fixed seat. The lifting support assembly is used to lift two round tube workpieces and align them with the midpoint of the rotating disk.

[0006] The lifting support assembly includes a lead screw mounted on the top surface of the machine tool base and connected to the drive end of a dual-axis motor, and two ramps on the top surface of the machine tool base. There are two lead screws with opposite thread directions. A sleeve block is threaded onto the outer surface of the lead screw. The sleeve block is a hollow structure, and a lifting rod is arranged vertically inside the sleeve block. One end of the lifting rod, which extends into the sleeve block, is connected to a lifting block, and the top end of the lifting rod is connected to a support platform for supporting the round tube workpiece. The two ramps are symmetrically arranged, and one side of the lifting block has an inclined surface that fits against the ramp.

[0007] A further technical improvement of the present invention is that: a locking wall block for limiting the top of the lifting block is provided on the bottom surface of the inner cavity of the sleeve block; a spring is sleeved on the outer surface of one end of the lifting rod that extends into the inner cavity of the sleeve block; and the two ends of the spring are respectively fixed to the top surface of the inner cavity of the sleeve block and the top surface of the lifting block.

[0008] A further technical improvement of the present invention is that: four gripper assemblies for limiting and clamping round tube workpieces are installed on the inner wall surface of the rotating disk. The gripper assembly includes a clamping seat that slides along the inner wall surface of the rotating disk. There are four clamping seats arranged in an L-shape, and the four clamping seats are simultaneously close to each other or simultaneously far apart. Each clamping seat has a clamping block slidably installed inside for contacting round tube workpieces of different diameters.

[0009] A further technical improvement of the present invention is that: a bevel gear 1 is mounted on the inner wall of the rotating disk via a servo motor, and four sliding grooves are provided on the inner surface of the rotating disk. The end of the bevel gear 1 is engaged with four bevel gears 2. A screw is fixedly connected to the middle of each bevel gear 2. The end of the screw is rotatably connected to the inner cavity of the rotating disk, and a moving block is threaded onto the outer surface of the screw. The end of the moving block passes through the sliding groove and is fixed to the outer wall of the clamping seat.

[0010] A further technical improvement of the present invention is that: a stepped cavity is provided on the surface of the clamping seat, the stepped cavity including an outer cavity and an inner cavity, the diameter of the outer cavity being larger than the diameter of the inner cavity;

[0011] The clamping block has a mounting post on its side that enters the outer cavity of the stepped cavity. Two springs are installed in the two inner cavities at the ends of the mounting post. Each spring has a stop block fixed to its end that abuts against the outer cavity. The end face of the spring has a push block for pushing the stop block to move.

[0012] A further technical improvement of the present invention is that: a limiting plate 1 and a limiting plate 2 for limiting the circular tube workpiece are respectively rotatably installed on both sides of the top surface of the support platform; a conveyor belt 1 for conveying the circular tube workpiece is provided on one side of the support platform; and a conveyor belt 2 for conveying the welded circular tube workpiece is provided on the other side of the support platform.

[0013] A further technical improvement of the present invention is that: the first limiting plate and the second limiting plate are respectively located at the gap between the second conveyor belt and the first conveyor belt, and a baffle plate pushed by a reciprocating electric push rod is provided on the side of the gap of the first conveyor belt near the second limiting plate. The baffle plate is used to block the round tube workpiece.

[0014] A further technical improvement of the present invention is that a pusher block driven by a stroke cylinder is installed in the slot at the top of the second limit plate, and the pushing surface of the pusher block is set as an arc-shaped structure.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The lifting support assembly raises the round tube workpiece to a height such that the center of the workpiece is collinear with the midpoint of the rotating disk. During the lifting motion, a dual-axis motor drives two lead screws to rotate in the same direction. Since the lead screws have two sets of threads in opposite directions, which engage with the threads of two sets of sleeve blocks respectively, the two sets of sleeve blocks slide along the top surface of the machine tool base, driving the two sets of lifting blocks to move together. The inclined surface on the lifting block slides along the slope. During the sliding process, the compression between the inclined surface of the lifting block and the slope generates a force... The thrust from above drives the lifting rod to rise. The maximum lifting height of the lifting rod is when the bottom surface of the lifting block is flush with the top surface of the machine tool base. After lifting, the round tube workpiece on the support platform is raised to the same height as the center of the turntable. Two round tube workpieces to be welded are raised at the same time. While being raised, the two sets of support platforms will also move closer to each other, so that the welding ends of the two round tube workpieces are brought closer to each other. Then, the moving seat pushes the two round tube workpieces closer to the fixed seat, which facilitates the alignment and welding of the round tube workpieces and improves the welding quality.

[0017] 2. The moving seat pushes the round tube workpiece on the support platform toward the fixed seat. At this time, the connection of the two round tube workpieces is in contact. In this state, the four clamping seats are in the open state, and the clamping blocks on the inner side of the clamping seats contact the side wall of the round tube workpiece. Then, the servo motor drives the first bevel gear to rotate. Under the meshing of the first bevel gear, the two perpendicularly set bevel gears rotate, realizing the rotation of the screw. Through the threaded connection between the screw and the moving block, the moving block slides in the sliding groove, thereby driving the clamping seats to move toward the center of the rotating disk. The four clamping seats move toward the center position synchronously, firmly clamping the round tube workpiece. The clamping blocks are designed with different arc lengths to adapt to the clamping of round tube workpieces of different diameters, improving applicability and making disassembly and assembly simple. In addition, the mounting column is hidden in the stepped cavity, and the clamping seats will not interfere with the movement of the rotating disk when sliding clamping.

[0018] 3. Limiting plate one is vertically positioned with the support platform, while limiting plate two is flush with conveyor belt one. Limiting plate one blocks the round tube workpiece conveyed by conveyor belt one. Then, a reciprocating electric push rod pushes the baffle plate upward to block the round tube workpiece conveyed by conveyor belt one. Afterward, a rotary motor drives limiting plate two to rotate upward. At this time, the outer surface of the round tube workpiece contacts the surfaces of limiting plate one and limiting plate two, limiting the two sides of the round tube workpiece. Then, following the lifting height of the support platform, it is convenient to align the two round tube workpieces. After welding, the support platform moves downward to one side of conveyor belt two, while limiting plate one flips downward. The stroke cylinder pushes the pusher block to act on the surface of the welded round tube workpiece. The round tube workpiece is moved from the support platform to conveyor belt two and automatically discharged. Attached Figure Description

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 3 This is a schematic diagram showing the structural connection between the rotating disk and the clamping seat of the present invention;

[0023] Figure 4 For the present invention Figure 3 A magnified view of a section at point B in the middle;

[0024] Figure 5 This is a schematic diagram showing the structural connection between the support platform and the first and second limiting plates of the present invention.

[0025] Figure 6 This is a top view of the support platform and conveyor belt of the present invention.

[0026] In the diagram: 1. Machine tool base; 3. Support platform; 4. Fixed seat; 5. Moving seat; 6. Lead screw; 7. Sleeve block; 8. Lifting rod; 9. Lifting block; 10. Inclined slope; 11. Inclined surface; 12. Spring 1; 13. Rotary disk; 14. Bevel gear 1; 15. Bevel gear 2; 16. Screw; 17. Moving block; 18. Sliding groove; 19. Clamping seat; 20. Clamping block; 21. Conveyor belt 1; 22. Baffle plate; 23. Conveyor belt 2; 24. Limiting plate 1; 25. Limiting plate 2; 26. Pushing block; 27. Stepped cavity; 28. Mounting column; 29. ​​Spring 2; 30. Stop block; 31. Pushing block. Detailed Implementation

[0027] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0028] Please see Figures 1-6As shown, the present invention provides a multi-angle welding machine tool with automatic feeding function, including a machine tool base 1. A lifting support assembly for supporting round tube workpieces is provided on the top surface of the machine tool base 1. Fixed seats 4, fixed to the top surface of the machine tool base 1, and movable seats 5, sliding on the machine tool base 1, are respectively provided on both sides of the lifting support assembly. Rotary disks 13 are rotatably mounted on the inner surfaces of the tops of both the movable seats 5 and the fixed seats 4. A conveyor belt 21 for conveying the round tube workpiece is provided on one side of the support platform 3, and a conveyor belt 23 for conveying the welded round tube workpiece is provided on the other side of the support platform 3. The round tube workpiece is conveyed by the conveyor belts... The conveyor belt 21 provides interval conveying, and after welding, the workpieces are output via conveyor belt 23, achieving automated feeding and unloading of the round tube workpieces. This reduces downtime and improves welding efficiency. The lifting support assembly is used to lift two round tube workpieces and align them with the midpoint of the rotating disk 13. The lifting support assembly includes a lead screw 6 mounted on the top surface of the machine tool base 1 and connected to the drive end of a dual-axis motor, and two ramps 10 on the top surface of the machine tool base 1. There are two lead screws 6 with opposite thread directions. A sleeve block 7 is threaded onto the outer surface of the lead screw 6. The sleeve block 7 is hollow, and a lifting rod 8 is arranged vertically inside the sleeve block 7. One end of the lifting rod 8, which extends into the sleeve block 7, is connected to a lifting block 9. The top end of the lifting rod 8 is connected to a support platform 3 for supporting the round tube workpiece. Two ramps 10 are symmetrically arranged. One side of the lifting block 9 is provided with an inclined surface 11 that fits against the ramp 10. The round tube workpiece is conveyed to the top surface of the support platform 3 by the conveyor belt 21. Then, the lifting support assembly lifts the round tube workpiece to a height such that the center of the round tube workpiece is collinear with the midpoint of the rotating disk 13. During the lifting motion, the two lead screws 6 are driven by a dual-axis motor to rotate in the same direction. Since the lead screws 6 are threadedly engaged with the sleeve block 7, the sleeve block 7 slides along the top surface of the machine tool base 1. During the sliding process, the lifting block 9 moves together with it. The inclined surface 11 on the lifting block 9 slides along the direction of the ramp 10. During the sliding process, the upward thrust generated by the compression between the inclined surface 11 of the lifting block 9 and the ramp 10 causes the lifting rod 8 to rise. The maximum lifting height of the lifting rod 8 is when the bottom surface of the lifting block 9 is flush with the top surface of the machine tool base 1. After lifting, the round tube workpiece on the support platform 3 is raised to the same height as the midpoint of the rotating disk 13. Two round tube workpieces to be welded are raised at one time. Then, the moving seat 5 pushes the two round tube workpieces closer to the fixed seat 4 to facilitate the alignment and welding of the round tube workpieces and improve the welding quality.

[0029] Please see Figure 2As shown, the bottom surface of the inner cavity of the sleeve block 7 is provided with a locking wall block for limiting the top end of the lifting block 9. A spring 12 is sleeved on the outer surface of one end of the lifting rod 8 that extends into the inner cavity of the sleeve block 7. The two ends of the spring 12 are fixed to the top surface of the inner cavity of the sleeve block 7 and the top surface of the lifting block 9, respectively. The maximum deformation of the spring 12 is greater than the height of the lifting block 9. The lifting rod 8 is driven upward by the compression of the lifting block 9, which simultaneously compresses the spring 12 to produce elastic deformation. When the lifting block 9 reaches one end of the ramp 10, the spring 12 automatically resets and limits the bottom end of the lifting rod 8 through the locking wall block.

[0030] Please see Figure 1 and Figure 3 As shown, four gripper assemblies for limiting and clamping round tube workpieces are installed on the inner wall of the rotating disk 13. Each gripper assembly includes a clamping seat 19 that slides along the inner wall of the rotating disk 13. Four clamping seats 19 are arranged in an L-shape, and the four clamping seats 19 can simultaneously approach or move away from each other. Each clamping seat 19 has a clamping block 20 slidably installed inside for contacting round tube workpieces of different diameters. A bevel gear 14 is mounted on the inner wall of the rotating disk 13 via a servo motor. Four sliding grooves 18 are provided on the inner surface of the rotating disk 13. The ends of the bevel gear 14 mesh with four bevel gears 15. A screw 16 is fixedly connected to the middle of each bevel gear 15. The end of the screw 16 is rotatably connected to the inner cavity of the rotating disk 13, and a moving block 17 is threaded onto the outer surface of the screw 16. The end of the moving block 17 passes through the sliding groove 18 and is fixed to the outer wall of the clamping seat 19. The round tube workpiece is initially located on two support platforms 3. When… After the midpoint of the round tube workpiece and the rotating disk 13 are collinear, the moving seat 5 pushes the round tube workpiece on the support platform 3 towards the fixed seat 4. At this time, the connection of the two round tube workpieces is in contact. In this state, the four clamping seats 19 are in the open state, and the clamping blocks 20 on the inner side of the clamping seats 19 are in contact with the side wall of the round tube workpiece. Then, the servo motor drives the bevel gear 14 to rotate. Under the meshing of the bevel gear 14, the two bevel gears 15 set perpendicularly to each other rotate, realizing the rotation of the screw 16. Through the threaded connection between the screw 16 and the moving block 17, the moving block 17 slides in the sliding groove 18, thereby driving the clamping seat 19 to move towards the center of the rotating disk 13. The four clamping seats 19 move towards the center position synchronously, firmly clamping the round tube workpiece. The rotating disk 13 on the moving seat 5 is driven by an external motor. The driving of the rotating disk 13 realizes the multi-angle rotation of the two welded round tube workpieces, which facilitates welding.

[0031] Please see Figure 3 and Figure 4As shown, the clamping seat 19 has a stepped cavity 27 on its surface, and a sliding groove on its L-shaped surface. The stepped cavity 27 includes an outer cavity and an inner cavity, with the diameter of the outer cavity being larger than that of the inner cavity. The clamping block 20 has a sliding block on its surface that matches the sliding groove, and a mounting post 28 is provided on the side of the clamping block 20 that enters the outer cavity of the stepped cavity 27. Two springs 29 are installed in the two inner cavities at the ends of the mounting posts 28. Each end of the spring 29 is fixedly connected to a stop block 30 that abuts against the outer cavity. The end face of the spring 29 is provided with a push block 31 for pushing the stop block 30 to move. The clamping seat 19 and the clamping block 20 are interchangeable. During installation, by pressing the two push blocks 31 inward, the spring 29 moves the stop block 30. The connecting stop 30 compresses the second spring 29, causing the end of the stop 30 to enter the inner cavity of the end of the mounting post 28. At this time, the other end of the stop 30 is flush with the outer surface of the mounting post 28, making it convenient for the mounting post 28 to pass through the inner cavity of the stepped cavity 27. When the end of the mounting post 28 leaves the inner cavity of the stepped cavity 27 and reaches the outer cavity, the second spring 29 returns to its original shape. At this time, the stop 30 contacts the inner wall surface of the outer cavity of the stepped cavity 27, thereby realizing the installation of the clamping block 20. According to the usage requirements, the clamping block 20 is designed with different arc lengths to adapt to the clamping of round tube workpieces of different diameters, improving applicability and simplifying disassembly and assembly. In addition, the mounting post 28 is hidden in the stepped cavity 27, and the clamping seat 19 will not interfere with the movement of the rotating disk 13 when sliding clamping.

[0032] Please see Figure 1 As shown, a gantry is installed on the top surface of the machine tool base 1. A welding torch for welding the connection of two round tube workpieces is slidably installed on the side of the gantry. The welding torch welds the connection of the two round tube workpieces. The movable seat 5 is driven by a propulsion motor at the end of the machine tool base 1. The movement of the movable seat 5 facilitates the alignment of the ends of the two round tube workpieces.

[0033] Please see Figure 1 , Figure 5 and Figure 6As shown, one side of the top surface of the support platform 3 is connected to a limiting plate 24 via a rotary motor, and the other side of the top surface of the support platform 3 is connected to a limiting plate 25 via a rotary motor. The limiting plate 25 and the limiting plate 24 are used to limit the circular tube workpiece. The limiting plate 24 and the limiting plate 25 are located at the gap between the conveyor belt 23 and the conveyor belt 21, respectively. A baffle plate 22, pushed by a reciprocating electric actuator, is provided on the side of the gap of the conveyor belt 21 near the limiting plate 25. The baffle plate 22 is used to block the circular tube workpiece. A pusher block 26, pushed by a stroke cylinder, is installed in the slot at the top of the limiting plate 25. The pushing surface of the pusher block 26 is set as an arc structure. In actual operation, the limiting plate 24 is set perpendicular to the support platform 3, while the limiting plate 25 is set flush with the conveyor belt 21. The limiting plate 24 controls the workpiece conveyed by the conveyor belt 21. The round tube workpiece is blocked. Then, the reciprocating electric push rod pushes the baffle plate 22 upward to block the round tube workpiece conveyed by the first conveyor belt 21. Then, the rotary motor drives the second limit plate 25 to rotate upward by 90 degrees. At this time, the outer surface of the round tube workpiece is in contact with the surfaces of the first limit plate 24 and the second limit plate 25. In order to accommodate the limiting of round tube workpieces of different diameters, pads can be installed on the surfaces of the first limit plate 24 and the second limit plate 25 to limit the two sides of the round tube workpiece. Then, the support platform 3 is lifted to facilitate the alignment of the two round tube workpieces. After welding, the support platform 3 is lowered to one side of the second conveyor belt 23, while the first limit plate 24 is rotated downward by 90 degrees. The stroke cylinder pushes the pusher block 26 to act on the surface of the welded round tube workpiece. The round tube workpiece is moved out from the support platform 3 onto the second conveyor belt 23 and automatically discharged. Then, the feeding steps are repeated.

[0034] In use, the first limiting plate 24 is vertically positioned with the support platform 3, while the second limiting plate 25 is flush with the first conveyor belt 21. The first limiting plate 24 blocks the round tube workpieces subsequently conveyed by the first conveyor belt 21. Then, the reciprocating electric push rod pushes the baffle plate 22 upward to block the round tube workpieces conveyed by the first conveyor belt 21. After that, the rotary motor drives the second limiting plate 25 to rotate upward by 90 degrees. At this time, the outer surface of the round tube workpiece contacts the surfaces of the first limiting plate 24 and the second limiting plate 25, limiting the two sides of the round tube workpiece. Then, it rises with the support platform 3 to facilitate the alignment of the two round tube workpieces.

[0035] Then, the lifting support assembly raises the round tube workpiece to a height such that the center of the round tube workpiece is collinear with the midpoint of the rotating disk 13. During the lifting motion, the two lead screws 6 are driven by the dual-axis motor to rotate in the same direction. Since the lead screws 6 have two sets of threads in opposite directions and are respectively engaged with the threads of the two sets of sleeves 7, the two sets of sleeves 7 slide along the top surface of the machine tool base 1, driving the two sets of lifting blocks 9 to move together. The inclined surface 11 on the lifting block 9 slides along the direction of the ramp 10. During the sliding process, due to the squeezing of the inclined surface 11 of the lifting block 9 and the ramp 10, The pressure generates an upward thrust, which drives the lifting rod 8 to rise. The maximum lifting height of the lifting rod 8 is when the bottom surface of the lifting block 9 is flush with the top surface of the machine tool base 1. After lifting, the round tube workpiece on the support platform 3 is raised to the same height as the midpoint of the rotating disk 13, raising two round tube workpieces to be welded at the same time. At the same time as lifting, the two sets of support platforms 3 will also move closer to each other, so that the welding ends of the two round tube workpieces move closer to each other. Then, the moving seat 5 pushes the two round tube workpieces closer to the fixed seat 4, which facilitates the alignment and welding of the round tube workpieces and improves the welding quality.

[0036] The moving seat 5 pushes the round tube workpiece on the support platform 3 toward the fixed seat 4. At this time, the connection of the two round tube workpieces is in contact. In this state, the four clamping seats 19 are in the open state. The clamping block 20 on the inner side of the clamping seat 19 contacts the side wall of the round tube workpiece. Then, the servo motor drives the bevel gear 14 to rotate. Under the meshing of the bevel gear 14, the two vertically arranged bevel gears 15 rotate, realizing the rotation of the screw 16. Through the threaded connection between the screw 16 and the moving block 17, the moving block 17 slides in the sliding groove 18, thereby driving the clamping seat 19 to move toward the center of the rotating disk 13. The four clamping seats 19 move toward the center position at the same time, and firmly clamp the round tube workpiece. The clamping block 20 is designed with different arc lengths to adapt to the clamping of round tube workpieces of different diameters, improving applicability and making disassembly and assembly simple. In addition, the mounting column 28 is hidden in the stepped cavity 27, and the clamping seat 19 will not interfere with the movement of the rotating disk 13 when sliding clamping.

[0037] After welding, the support platform 3 moves downward to one side of the second conveyor belt 23, while the first limiting plate 24 rotates downward 90 degrees. The stroke cylinder pushes the pusher block 26 to act on the surface of the welded round tube workpiece. The round tube workpiece is moved from the support platform 3 onto the second conveyor belt 23 and is automatically discharged.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A multi-angle welding machine tool with automatic feeding function, comprising a machine tool base (1), characterized in that: The top surface of the machine tool base (1) is provided with a lifting support assembly for supporting the round tube workpiece. On both sides of the lifting support assembly, there are fixed seats (4) fixed to the top surface of the machine tool base (1) and movable seats (5) sliding on the machine tool base (1). The inner side of the top of the movable seat (5) and the fixed seat (4) are rotatably mounted with a rotating disk (13). The lifting support assembly is used to lift the two round tube workpieces and align them with the midpoint of the rotating disk (13). The lifting support assembly includes a lead screw (6) installed on the top surface of the machine tool base (1) and connected to the drive end of a dual-axis motor, and two ramps (10) provided on the top surface of the machine tool base (1). There are two lead screws (6), and the threads of the two lead screws (6) are opposite. A sleeve block (7) is threaded on the outer surface of the lead screw (6). The sleeve block (7) is a hollow structure, and a lifting rod (8) is provided in the interior of the sleeve block (7) along the vertical direction. One end of the lifting rod (8) extends into the interior of the sleeve block (7) and is connected to a lifting block (9). The top end of the lifting rod (8) is connected to a support platform (3) for supporting the round tube workpiece. The two ramps (10) are symmetrically arranged, and one side of the lifting block (9) is provided with an inclined surface (11) that fits against the ramp (10).

2. The multi-angle welding machine tool with automatic feeding function according to claim 1, characterized in that, The inner cavity bottom surface of the sleeve (7) is provided with a locking wall block for limiting the top of the lifting block (9). The lifting rod (8) extends into the outer surface of one end of the sleeve (7) and a spring (12) is sleeved thereon. The two ends of the spring (12) are respectively fixed to the top surface of the inner cavity of the sleeve (7) and the top surface of the lifting block (9).

3. A multi-angle welding machine tool with automatic feeding function according to claim 1, characterized in that, Four gripper assemblies for limiting and clamping round tube workpieces are installed on the inner wall surface of the rotating disk (13). The gripper assembly includes a clamping seat (19) that slides along the inner wall surface of the rotating disk (13). There are four clamping seats (19) arranged in an L-shape, and the four clamping seats (19) are simultaneously close to each other or simultaneously far away from each other. Each clamping seat (19) has a clamping block (20) slidably installed inside for contacting round tube workpieces of different diameters.

4. A multi-angle welding machine tool with automatic feeding function according to claim 3, characterized in that, A bevel gear (14) is mounted on the inner wall of the rotating disk (13) via a servo motor, and four sliding grooves (18) are provided on the inner surface of the rotating disk (13). The end of the bevel gear (14) is meshed with four bevel gears (15). A screw (16) is fixedly connected to the middle of each bevel gear (15). The end of the screw (16) is rotatably connected to the inner cavity of the rotating disk (13), and a moving block (17) is threaded onto the outer surface of the screw (16). The end of the moving block (17) passes through the sliding groove (18) and is fixed to the outer wall of the clamping seat (19).

5. A multi-angle welding machine tool with automatic feeding function according to claim 3, characterized in that, The clamping seat (19) has a stepped cavity (27) on its surface. The stepped cavity (27) includes an outer cavity and an inner cavity, and the diameter of the outer cavity is larger than the diameter of the inner cavity. The clamping block (20) has a mounting post (28) on its side that enters the outer cavity of the stepped cavity (27). Two springs (29) are installed in the two inner cavities at the ends of the mounting post (28). Each spring (29) has a stop block (30) fixed to its end that abuts against the outer cavity. The end face of the spring (29) is provided with a push block (31) for pushing the stop block (30) to move.

6. A multi-angle welding machine tool with automatic feeding function according to claim 1, characterized in that, The top surface of the support platform (3) is rotatably mounted with a limiting plate 1 (24) and a limiting plate 2 (25) for limiting the circular tube workpiece. A conveyor belt 1 (21) for conveying the circular tube workpiece is provided on one side of the support platform (3), and a conveyor belt 2 (23) for conveying the welded circular tube workpiece is provided on the other side of the support platform (3).

7. A multi-angle welding machine tool with automatic feeding function according to claim 6, characterized in that, The first limiting plate (24) and the second limiting plate (25) are located at the gap between the second conveyor belt (23) and the first conveyor belt (21), respectively. A baffle plate (22) driven by a reciprocating electric push rod is provided on the side of the gap of the first conveyor belt (21) near the second limiting plate (25). The baffle plate (22) is used to block the round tube workpiece.

8. A multi-angle welding machine tool with automatic feeding function according to claim 6, characterized in that, A pusher block (26) driven by a stroke cylinder is installed in the slot at the top of the limiting plate (25), and the pushing surface of the pusher block (26) is set as an arc structure.

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