Automatic welding machine double chuck mechanism

Abstract

This utility model provides a dual-chuck mechanism for an automatic welding machine, including a base, a moving drive assembly, a fixed chuck assembly, a moving chuck assembly, a rotating drive assembly, and a stage. The moving drive assembly includes a first servo motor, a lead screw, and a guide rail. The fixed chuck assembly and the moving chuck assembly are arranged opposite each other on the guide rail, with the fixed chuck assembly fixed relative to the base. Driven by the first servo motor and the lead screw, the moving chuck assembly can move closer to and further away from the fixed chuck assembly along the guide rail to clamp the workpiece. The rotating drive assembly includes a second servo motor, a first synchronous shaft, and a second synchronous shaft. The second servo motor drives the fixed chuck assembly and the moving chuck assembly via the synchronous shafts to make the two chucks rotate synchronously, achieving the final welding action. This dual-chuck mechanism has one stationary and one moving chuck; the static part provides basic support, while the dynamic part allows for precise adjustment. The chucks use pneumatic chucks and customized high-precision chucks, ensuring accurate positioning and high repeatability.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, and in particular to a double chuck mechanism for an automatic welding machine. Background Technology

[0002] Double-headed chucks are core components used for workpiece positioning and clamping on automated machine tools. Existing double-headed chuck structures, as seen in the utility model patent with authorization announcement number CN202639341U, generally have two chucks, a main chuck and an auxiliary chuck. The main and auxiliary chucks are brought closer or further apart by a transmission device. The transmission device is generally designed to be quite complex, and the main and auxiliary chucks cannot rotate simultaneously, which cannot meet the welding requirements of automatic welding machines.

[0003] In view of this, it is necessary to improve the existing chuck mechanism to solve the above problems. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a double chuck mechanism for an automatic welding machine.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an automatic welding machine double chuck mechanism, including a base, a moving drive assembly, a fixed chuck assembly, a moving chuck assembly, a rotating drive assembly, and a platform, wherein... The base, located at the bottom of the entire mechanism, is used to support the mechanism and connect to other equipment; The moving drive assembly includes a first servo motor, a lead screw, and a guide rail. The first servo motor is located on the right side of the base, with its output end connected to one end of the lead screw. The other end of the lead screw extends to the left side of the base and is connected to the moving chuck assembly. The guide rail consists of two rails located on the base on both sides of the lead screw. The fixed chuck assembly and the movable chuck assembly are arranged opposite each other on the guide rail. The fixed chuck assembly is fixed relative to the base. Driven by the first servo motor and the lead screw, the movable chuck assembly can move closer to and away from the fixed chuck assembly along the guide rail to clamp the workpiece. A stage is set between the fixed chuck assembly and the movable chuck assembly, and is fixed relative to the base by a side support plate. It is used to support the chuck concentric calibration mechanism. The side support plate is set on the side of the base. A rotation drive assembly, located on one side of the motion drive assembly, includes a second servo motor, a first synchronous transmission assembly, a second synchronous transmission assembly, a third synchronous transmission assembly, a first synchronous shaft, a second synchronous shaft, and a coupling. The second servo motor is fixed to the left side of the base. The first and second synchronous shafts are coaxially positioned above the second servo motor, with their opposite ends connected via a coupling. The other end of the first synchronous shaft extends to the left and is connected to the input end of the second synchronous transmission assembly, while the output end of the second synchronous transmission assembly is connected to the fixed chuck assembly. The other end of the second synchronous shaft extends to the right and is connected to the input end of the third synchronous transmission assembly, while the output end of the third synchronous transmission assembly is connected to the movable chuck assembly. The first synchronous transmission assembly is vertically positioned, with its input end connected to the output shaft of the second servo motor and its output end connected to the first synchronous shaft.

[0006] Furthermore, the movable chuck assembly includes a movable high-precision chuck, a movable base plate, and a movable seat. The movable base plate is connected to the guide rail via a slider. The bottom of the movable seat is fixed to the movable base plate, and the upper end is connected to a second high-precision chuck, which faces the side of the fixed chuck assembly.

[0007] Furthermore, the fixed chuck assembly includes a first high-precision chuck, a fixed base plate, and a fixed seat. The fixed base plate is connected to the guide rail via a slider and is fixed to the side support plate. The bottom of the fixed seat is fixed to the fixed base plate, and the upper end is connected to the first high-precision chuck. The first high-precision chuck and the second high-precision chuck are directly opposite each other.

[0008] Specifically, the first synchronous transmission assembly includes a first synchronous belt, a first driving pulley, and a first driven pulley. The first driving pulley is mounted on the output shaft of the second servo motor, and the first driven pulley is mounted on the first synchronous shaft. The first synchronous belt drives the first driving pulley and the first driven pulley, and transmits torque through the second servo motor, the first driving pulley, the first synchronous belt, and the first driven pulley to drive the first synchronous shaft to rotate.

[0009] Specifically, the second synchronous transmission assembly includes a second synchronous belt, a second driving pulley, a second driven pulley, a housing, and a tensioning pulley. The second synchronous belt, the second driving pulley, the second driven pulley, and the tensioning pulley are all housed inside the housing. The second driving pulley is located at the left end of the first synchronous shaft, and the second driven pulley is located on the left side of the fixed chuck assembly and is coaxial with the first high-precision chuck. The second synchronous belt is driven and connected to the second driving pulley and the second driven pulley. The tensioning pulley is located below the second synchronous belt and presses the second synchronous belt inward. The tensioning pulley is fixed to the fixed base plate through a tensioning bracket.

[0010] Specifically, the third synchronous transmission assembly includes a third synchronous belt, a third driving pulley, a third driven pulley, a housing, and a tensioning pulley. The third synchronous belt, the third driving pulley, the third driven pulley, and the tensioning pulley are all housed inside the housing. The third driving pulley is located at the right end of the second synchronous shaft. The third driven pulley is located on the right side of the movable chuck assembly and is coaxial with the second high-precision chuck. The third synchronous belt is driven and connected to the third driving pulley and the third driven pulley. The tensioning pulley is located below the third synchronous belt and presses the third synchronous belt inward. The tensioning pulley is fixed to the movable base plate through a tensioning bracket.

[0011] Furthermore, to ensure transmission stability, the system also includes a first bracket, a second bracket, a third bracket, and a fourth bracket. The lower end of the first bracket is fixed to the base, and the upper end is connected to the first synchronous transmission assembly to support it. The second bracket is positioned below the coupling, with its bottom fixed to the base. Two support plates are located at the upper end of the second bracket, respectively positioned on the left and right sides of the coupling. The right end of the first synchronous shaft is rotatably connected to the left support plate via a bearing, and the left end of the second synchronous shaft is rotatably connected to the right support plate via a bearing. The third... The bracket is located on the front side of the movable base plate and is coaxial with the third drive wheel of the movable chuck assembly. The bottom of the third bracket is fixedly connected to the movable base plate, and the upper end is rotatably connected to the second synchronous shaft through a transmission nut. The second synchronous shaft is a screw. The rotation of the second synchronous shaft can convert the linear movement of the transmission nut on the second synchronous shaft, thereby driving the movable base plate to move along the guide rail through the third bracket. The transmission nut is fixedly connected to the third drive wheel, so that the third drive wheel and the transmission nut move synchronously. The fourth bracket is located at the right end of the second synchronous shaft, with its bottom fixedly connected to the base and its upper end connected to the right end of the second synchronous shaft through a bearing.

[0012] By setting up multiple supports, the various components of the rotary drive assembly can be made more stable during transmission.

[0013] Furthermore, it also includes connecting corner pieces, of which there are multiple connecting corner pieces arranged along the circumference of the base to achieve connection and fixation between the base and other mechanisms or equipment.

[0014] Furthermore, when changing to different product models, in order to ensure positioning accuracy, the fixed chuck needs to be fine-tuned. This also includes a fine-tuning mechanism, which consists of multiple sets arranged around the circumference of the fixed seat. These mechanisms can fine-tune the position of the fixed seat in the front-back and left-right directions. Each set of fine-tuning mechanisms includes an adjusting block and an adjusting screw. The adjusting block is fixedly connected to the fixed base plate, and the adjusting screw is threaded onto the adjusting block with its end abutting against the fixed seat. By adjusting the length of the adjusting screw, the position of the fixed seat can be fine-tuned.

[0015] The beneficial effects of this utility model are as follows: The automatic welding machine double chuck mechanism provided by this utility model adopts a double chuck mechanism, one static and one dynamic. The static part provides basic support, while the dynamic part realizes precise adjustment. The chuck uses a pneumatic chuck and a customized high-precision chuck, which is accurate in positioning and has high repeatability. While moving, it can drive the workpiece to rotate, thus meeting the welding requirements of the automatic welding machine. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a three-dimensional structural diagram of the double chuck mechanism of the automatic welding machine of this utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of the double chuck mechanism of the automatic welding machine of this utility model.

[0019] Figure 3 This is a partial enlarged structural diagram of the side near the fixed chuck assembly.

[0020] Figure 4 yes Figure 3 A schematic diagram of the structure with some components removed (excluding the cover and the first support).

[0021] In the diagram: 1. Base; 2. First high-precision chuck; 3. Second high-precision chuck; 4. Fixed base plate; 5. Movable base plate; 6. Stage; 7. Side support plate; 9. Connecting corner piece; 10. First servo motor; 11. Lead screw; 12. Guide rail; 13. Second servo motor; 14. First synchronous transmission assembly; 14.1. First synchronous belt; 14.2. First driving pulley; 14.3. First driven pulley; 15. Second synchronous transmission assembly; 15.1. 15.2. Cover, 15.3. Second driving pulley, 15.4. Second driven pulley, 15.5. Second synchronous belt, 15.6. Tensioner pulley, 15.7. Tensioner bracket, 16. Third synchronous transmission assembly, 17. First synchronous shaft, 18. Second synchronous shaft, 19. Coupling, 20. First bracket, 21. Second bracket, 22. Third bracket, 23. Fourth bracket, 24. First dial indicator, 25. Second dial indicator, 26. Fixed base, 27. Moving base. Detailed Implementation

[0022] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1 and Figure 2As shown, this utility model discloses an automatic welding machine double chuck mechanism, including a base 1, a moving drive assembly, a fixed chuck assembly, a moving chuck assembly, a rotating drive assembly, and a platform 6. The base 1 is located below the entire mechanism and serves to support it and connect it to other equipment. The moving drive assembly includes a first servo motor 10, a lead screw 11, and guide rails 12. The first servo motor 10 is located on the right side of the base 1, with its output end connected to one end of the lead screw 11. The other end of the lead screw 11 extends to the left side of the base 1 and connects to the moving chuck assembly. The guide rails 12 consist of two rails mounted on the lead screw 11. The workpiece is clamped on the base 1 on both sides. A fixed chuck assembly and a movable chuck assembly are arranged opposite each other on the guide rail 12. The fixed chuck assembly is fixed relative to the base 1. The movable chuck assembly, driven by the first servo motor 10 and the lead screw 11, can move closer to and further away from the fixed chuck assembly along the guide rail 12 to clamp the workpiece. The movable chuck assembly includes a movable high-precision chuck, a movable base plate 5, and a movable seat 27. The movable base plate 5 is connected to the guide rail 12 via a slider. The bottom of the movable seat 27 is fixed to the movable base plate 5, and the upper end is connected to a second high-precision chuck 3, which faces the fixed chuck assembly. The fixed chuck assembly includes a first high-precision chuck 2, a fixed base plate 4, and a fixed seat 26. The fixed base plate 4 is connected to the guide rail 12 via a slider, and its side is fixed to the side support plate 7. The bottom of the fixed seat 26 is fixed to the fixed base plate 4, and the upper end is connected to the first high-precision chuck 2, which faces the second high-precision chuck 3. The stage 6 is positioned between the fixed chuck assembly and the movable chuck assembly, and is fixed relative to the base 1 via a side support plate 7. It is used for the chuck concentric calibration mechanism, and the side support plate 7 is positioned on the side of the base 1. The chuck concentric calibration mechanism includes a first dial indicator 24 and a second dial indicator 25, which are perpendicular to each other. After the two chucks are assembled, the chucks are calibrated and measured to ensure their alignment and positioning accuracy. A rotation drive assembly, located on one side of the movable drive assembly, includes a second servo motor 13, a first synchronous transmission assembly 14, a second synchronous transmission assembly 15, a third synchronous transmission assembly 16, a first synchronous shaft 17, a second synchronous shaft 18, and a coupling 19. The second servo motor 13 is fixed to the left side of the base 1. The first synchronous shaft 17 and the second synchronous shaft 18 are coaxially arranged above the second servo motor 13, and their opposite ends are connected by a coupling. The other end of the first synchronous shaft 17 extends to the left and is connected to the input end of the second synchronous transmission assembly 15, and the output end of the second synchronous transmission assembly 15 is connected to the fixed chuck assembly. The other end of the second synchronous shaft 18 extends to the right and is connected to the input end of the third synchronous transmission assembly 16, and the output end of the third synchronous transmission assembly 16 is connected to the movable chuck assembly. The first synchronous transmission assembly 14 is vertically arranged, with its input end connected to the output shaft of the second servo motor 13 and its output end connected to the first synchronous shaft 17.To ensure transmission stability, the system also includes a first bracket 20, a second bracket 21, a third bracket 22, and a fourth bracket 23. The lower end of the first bracket 20 is fixed to the base 1, and the upper end is connected to the first synchronous transmission assembly 14 to support it. The second bracket 21 is located below the coupling, with its bottom fixed to the base 1. It has two support plates at its upper end, which are respectively located on the left and right sides of the coupling. The right end of the first synchronous shaft 17 is rotatably connected to the left support plate via a bearing, and the left end of the second synchronous shaft 18 is rotatably connected to the right support plate via a bearing. The third bracket 20... 2. The third bracket 22 is located on the front side of the movable base plate 5 and is coaxial with the third drive wheel of the movable chuck assembly. The bottom of the third bracket 22 is fixedly connected to the movable base plate 5, and the upper end is rotatably connected to the second synchronous shaft 18 through a transmission nut. The second synchronous shaft 18 is a screw. The rotation of the second synchronous shaft 18 can convert the linear movement of the transmission nut on the second synchronous shaft 18, thereby driving the movable base plate 5 to move along the guide rail 12 through the third bracket 22. The transmission nut is fixedly connected to the third drive wheel, so that the third drive wheel and the transmission nut move synchronously. The fourth bracket 23 is located at the right end of the second synchronous shaft 18, with its bottom fixedly connected to the base 1 and its upper end connected to the right end of the second synchronous shaft 18 through a bearing. It also includes connecting corner pieces 9, of which there are multiple connecting corner pieces 9, which are arranged circumferentially along the base 1 to realize the connection and fixation of the base 1 with other mechanisms or equipment.

[0026] like Figure 3 and Figure 4As shown, the first synchronous transmission assembly 14 includes a first synchronous belt 14.1, a first driving pulley 14.2, and a first driven pulley 14.3. The first driving pulley 14.2 is disposed on the output shaft of the second servo motor 13, and the first driven pulley 14.3 is disposed on the first synchronous shaft 17. The first synchronous belt 14.1 is connected between the first driving pulley 14.2 and the first driven pulley 14.3, and transmits torque through the second servo motor 13, the first driving pulley 14.2, the first synchronous belt 14.1, and the first driven pulley 14.3 to drive the first synchronous shaft 17 to rotate. The second synchronous transmission assembly 15 includes a second synchronous belt 15.4, a second driving pulley 15.2, a second driven pulley 15.3, a cover 15.1, and a tensioning pulley 15.5. The second synchronous belt 15.4, the second driving pulley 15.2, the second driven pulley 15.3, and the tensioning pulley 15.5 are all housed inside the cover 15.1. The second driving pulley 15.2 is located at the left end of the first synchronous shaft 17. The second driven pulley 15.3 is located on the left side of the fixed chuck assembly and is coaxial with the first high-precision chuck 2. The second synchronous belt 15.4 is drivenly connected to the second driving pulley 15.2 and the second driven pulley 15.3. The tensioning pulley 15.5 is located below the second synchronous belt 15.4 and presses the second synchronous belt 15.4 inward. The tensioning pulley 15.5 is fixed to the fixed base plate 4 through a tensioning bracket 15.6. The structure of the third synchronous transmission assembly 16 is basically the same as that of the second synchronous transmission assembly 15, and their components have a one-to-one correspondence. Therefore, its diagram can be referred to. Figure 3 and Figure 4 Specifically, it includes a third synchronous belt, a third driving pulley, a third driven pulley, a cover, and a tensioning pulley. The third synchronous belt, the third driving pulley, the third driven pulley, and the tensioning pulley are all housed inside the cover. The third driving pulley is located at the right end of the second synchronous shaft 18. The third driven pulley is located on the right side of the movable chuck assembly and is coaxial with the second high-precision chuck 3. The third synchronous belt is driven and connected to the third driving pulley and the third driven pulley. The tensioning pulley is located below the third synchronous belt and presses the third synchronous belt inward. The tensioning pulley is fixed to the movable base plate 5 through a tensioning bracket.

[0027] When changing to different models of products, in order to ensure positioning accuracy, the fixed chuck needs to be fine-tuned, which also includes a fine-tuning mechanism (not shown in the figure). The fine-tuning mechanism consists of multiple sets, which are arranged around the circumference of the fixed seat and can fine-tune the position of the fixed seat in the front-back and left-right directions. Each set of fine-tuning mechanisms includes an adjusting block and an adjusting screw. The adjusting block is fixedly connected to the fixed base plate 4, and the adjusting screw is threadedly connected to the adjusting block, with its end abutting against the fixed seat 26. The position of the fixed seat 26 can be fine-tuned by adjusting the length of the adjusting screw.

[0028] Working principle: The dual-chuck structure consists of a fixed chuck assembly, a movable chuck assembly, and a motion drive assembly comprising a lead screw 11, a guide rail 12, a servo motor, and a synchronous shaft. The robotic arm transports the parts between the two chuck assemblies. The chucks drive high-precision grippers to clamp the parts, the motor drives the movable chuck to the designated position, and the synchronous shaft enables the dual chucks to rotate synchronously, achieving the final welding operation.

[0029] The fixed chuck assembly has a bottom fixed base plate 4 with a fine-tuning mechanism consisting of an adjusting screw and a locking nut, which facilitates fine-tuning during subsequent model changes. The movable chuck assembly is connected to the guide rail 12 and the lead screw 11 via the movable base plate 5. Both the movable and fixed parts use custom-made high-precision chucks with a clamping accuracy within ±0.005mm, ensuring that the final product meets the accuracy requirements. The fixed chuck and the movable chuck are connected by a synchronous shaft to ensure synchronous movement during axial rotation.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A double-chuck mechanism for an automatic welding machine, characterized in that: It includes a base, a moving drive assembly, a fixed chuck assembly, a moving chuck assembly, a rotating drive assembly, and a stage, among which, The base, located at the bottom of the entire mechanism, is used to support the mechanism and connect to other equipment; The moving drive assembly includes a first servo motor, a lead screw, and a guide rail. The first servo motor is located on the right side of the base, with its output end connected to one end of the lead screw. The other end of the lead screw extends to the left side of the base and is connected to the moving chuck assembly. The guide rail consists of two rails located on the base on both sides of the lead screw. The fixed chuck assembly and the movable chuck assembly are arranged opposite each other on the guide rail. The fixed chuck assembly is fixed relative to the base. Driven by the first servo motor and the lead screw, the movable chuck assembly can move closer to and away from the fixed chuck assembly along the guide rail to clamp the workpiece. A stage is set between the fixed chuck assembly and the movable chuck assembly, and is fixed relative to the base by a side support plate. It is used to support the chuck concentric calibration mechanism. The side support plate is set on the side of the base. A rotation drive assembly, located on one side of the motion drive assembly, includes a second servo motor, a first synchronous transmission assembly, a second synchronous transmission assembly, a third synchronous transmission assembly, a first synchronous shaft, a second synchronous shaft, and a coupling. The second servo motor is fixed to the left side of the base. The first and second synchronous shafts are coaxially positioned above the second servo motor, with their opposite ends connected via a coupling. The other end of the first synchronous shaft extends to the left and is connected to the input end of the second synchronous transmission assembly, while the output end of the second synchronous transmission assembly is connected to the fixed chuck assembly. The other end of the second synchronous shaft extends to the right and is connected to the input end of the third synchronous transmission assembly, while the output end of the third synchronous transmission assembly is connected to the movable chuck assembly. The first synchronous transmission assembly is vertically positioned, with its input end connected to the output shaft of the second servo motor and its output end connected to the first synchronous shaft.

2. The automatic welding machine double chuck mechanism as described in claim 1, characterized in that: The movable chuck assembly includes a movable high-precision chuck, a movable base plate, and a movable seat. The movable base plate is connected to the guide rail via a slider. The bottom of the movable seat is fixed to the movable base plate, and the upper end is connected to a second high-precision chuck. The second high-precision chuck faces the side of the fixed chuck assembly.

3. The automatic welding machine double chuck mechanism as described in claim 2, characterized in that: The fixed chuck assembly includes a first high-precision chuck, a fixed base plate, and a fixed seat. The fixed base plate is connected to the guide rail by a slider and is fixed to the side support plate. The bottom of the fixed seat is fixed to the fixed base plate, and the upper end is connected to the first high-precision chuck. The first high-precision chuck and the second high-precision chuck are directly opposite each other.

4. The automatic welding machine double chuck mechanism as described in claim 1, characterized in that: The first synchronous transmission assembly includes a first synchronous belt, a first driving pulley, and a first driven pulley. The first driving pulley is mounted on the output shaft of the second servo motor, and the first driven pulley is mounted on the first synchronous shaft. The first synchronous belt drives the first driving pulley and the first driven pulley, and transmits torque through the second servo motor, the first driving pulley, the first synchronous belt, and the first driven pulley to drive the first synchronous shaft to rotate.

5. The automatic welding machine double chuck mechanism as described in claim 1, characterized in that: The second synchronous transmission assembly includes a second synchronous belt, a second driving pulley, a second driven pulley, a housing, and a tensioning pulley. The second synchronous belt, the second driving pulley, the second driven pulley, and the tensioning pulley are all housed inside the housing. The second driving pulley is located at the left end of the first synchronous shaft, and the second driven pulley is located on the left side of the fixed chuck assembly and is coaxial with the first high-precision chuck. The second synchronous belt is driven and connected to the second driving pulley and the second driven pulley. The tensioning pulley is located below the second synchronous belt and presses the second synchronous belt inward. The tensioning pulley is fixed to the fixed base plate by a tensioning bracket.

6. The automatic welding machine double chuck mechanism as described in claim 1, characterized in that: The third synchronous transmission assembly includes a third synchronous belt, a third driving pulley, a third driven pulley, a housing, and a tensioning pulley. The third synchronous belt, the third driving pulley, the third driven pulley, and the tensioning pulley are all housed inside the housing. The third driving pulley is located at the right end of the second synchronous shaft. The third driven pulley is located on the right side of the movable chuck assembly and is coaxial with the second high-precision chuck. The third synchronous belt is driven and connected to the third driving pulley and the third driven pulley. The tensioning pulley is located below the third synchronous belt and presses the third synchronous belt inward. The tensioning pulley is fixed to the movable base plate by a tensioning bracket.

7. The automatic welding machine double chuck mechanism as described in claim 1, characterized in that: It also includes a first bracket, a second bracket, a third bracket, and a fourth bracket. The lower end of the first bracket is fixed to the base, and the upper end is connected to the first synchronous transmission assembly to support the first synchronous transmission assembly. The second bracket is located below the coupling, and its bottom is fixed to the base. The upper end of the second bracket has two support plates, which are respectively located on the left and right sides of the coupling. The right end of the first synchronous shaft is rotatably connected to the left support plate through a bearing, and the left end of the second synchronous shaft is rotatably connected to the right support plate through a bearing. The third bracket is located on the front side of the movable base plate and is coaxial with the third drive wheel of the movable chuck assembly. The bottom of the third bracket is fixed to the movable base plate, and its upper end is rotatably connected to the second synchronous shaft through a transmission nut. The transmission nut is fixed to the third drive wheel, so that the third drive wheel and the transmission nut move synchronously. The fourth bracket is located at the right end of the second synchronous shaft, with its bottom fixed to the base and its upper end connected to the right end of the second synchronous shaft through a bearing.

8. The automatic welding machine double chuck mechanism as described in claim 1, characterized in that: It also includes connecting corner pieces, which are multiple in number and arranged along the circumference of the base to achieve connection and fixation between the base and other mechanisms or equipment.

9. The automatic welding machine double chuck mechanism as described in claim 1, characterized in that: It also includes a fine-tuning mechanism, which consists of multiple sets arranged around the circumference of the fixed base. The fine-tuning mechanism can fine-tune the position of the fixed base in the front-back and left-right directions. Each set of fine-tuning mechanisms includes an adjusting block and an adjusting screw. The adjusting block is fixedly connected to the fixed base plate, and the adjusting screw is threaded onto the adjusting block with its end abutting against the fixed base. The position of the fixed base can be fine-tuned by adjusting the length of the adjusting screw.

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