CN204449889U - Automatic system around the circle - Google Patents

Abstract

Automatic rounding system. An automatic rounding system with high production efficiency, high degree of automation, one-time molding and good consistency is provided. It includes a frame, a moving mechanism, a circle-circling mechanism, at least one set of positioning welding mechanisms and a pair of lifting mechanisms. The workbench is provided with a positioning groove, and the moving mechanism includes a pair of fixed frames, a moving motor, and a transmission wheel. and a transmission belt, the pair of fixing frames are respectively arranged on the pair of lifting mechanisms, and the circle-circling mechanism includes a circle-circle driving motor, a motor fixing seat, a circle-circle seat and a translation fixing device, and the translation fixing device is located on Between the pair of fixed frames, the round seat includes a clamping body and a round rod, and an anti-skid guide groove is provided on the round surface, and the positioning welding mechanism includes a clamping device, a shearing device, a sliding device, Rear positioning device, left welding positioning device and right welding positioning device. The utility model has good overall continuity, high processing efficiency, good product consistency and high degree of automation.

Description

Automatic rounding system

technical field

The utility model relates to a rounding system, in particular to a system for rounding and welding the tail of a rod-shaped material.

Background technique

In the production of test tube brushes, thimbles and other products, the products are usually made by planting hair on the rod body or molding the rod body, but when in use, they can only be placed on the platform, which is easy to be contaminated with bacteria, especially test tube brushes. Affect the cleaning effect of the test tube. At present, there is also a production mode in which rod-shaped materials are circled by manual operation or semi-automatic equipment on the market. Manual operation has the problems of low efficiency and heavy workload. Although semi-automatic equipment has improved work efficiency, it still needs to cut, Circling, fixed step-by-step operation, low degree of automation; at the same time, due to multiple positioning, the dimensional consistency of circling is poor.

On December 3, 2014, the National Bureau disclosed a utility model patent with an application number of "201420270105.4" and a name called "a kind of circular mechanism". For round products, the circle-circling mechanism includes the first mechanical arm, the second mechanical arm and the clamping shaft. By changing the setting direction of the clamping shaft and adding the third mechanical arm used to assist in supporting the product on the clamping shaft, it can achieve circular, The purpose of stable production. However, in actual use, there are still the following problems: 1. In a unit time, it can only be processed one by one, and the work efficiency is low; It has the function of fulcrum and cutting. Although it increases the position stability of the workpiece, it also scratches the surface of the workpiece, affects the mechanical performance, and the overall safety of the equipment is low.

On August 15, 2012, the National Bureau disclosed a utility model patent with the application number "201120538042.2" and the name "H-shaped lining around the circle device". Steel strips with equal curvature radii are produced under mutual extrusion around the round rod, pressure roller I, pressure roller II and pressure roller III. However, the following defects still exist: one, the steel strip becomes round and walks sideways, so that the stability of the steel strip after the circle is poor; two, automatic cutting cannot be realized, which causes inconvenience in use and reduces work efficiency.

Utility model content

Aiming at the above problems, the utility model provides an automatic rounding system with high production efficiency, high degree of automation, one-time molding and good consistency.

The technical scheme of the utility model is: including a frame, a moving mechanism, a circle mechanism, at least one set of positioning welding mechanisms and a pair of lifting mechanisms, the positioning welding mechanism is arranged on the frame, and the frame It includes a workbench parallel to the XY plane, the pair of lifting mechanisms are arranged on the frame, and the circle-circling mechanism is arranged on the moving mechanism and located above the positioning welding mechanism;

The workbench is provided with positioning grooves corresponding to the positioning welding mechanism one by one;

The moving mechanism includes a pair of fixed frames, a moving motor, a transmission wheel, and a transmission belt moving along the X direction. The pair of fixed frames are respectively arranged on the pair of lifting mechanisms and move up and down along the Z axis. , the mobile motor and the transmission wheel are respectively arranged on the pair of fixed frames, and the transmission belt is arranged between the mobile motor and the transmission wheel;

The circle-circling mechanism includes a circle-circle driving motor, a motor fixing seat, a circle-circling seat and a translation fixing device, the translation fixing device is arranged between the pair of fixing frames, and the motor fixing seat is arranged on the translation fixing On the device, the circular driving motor is arranged on the motor fixing seat;

The circular seat includes a clamping body and a circular rod connected together, the circular rod is arranged on the side of the clamping body, and the clamping body is connected to the motor shaft of the circular drive motor , the side of the round rod facing the clamping body is a round surface, the round surface is provided with an anti-slip guide groove, and the cross-section of the anti-slip guide groove is triangular or arc-shaped;

The positioning welding mechanism includes a clamping device, a shearing device, a sliding device, a rear positioning device, a left welding positioning device and a right welding positioning device;

The clamping device includes a clamping fixture, a clamping cylinder, a support plate and a pair of clamping arms parallel to the XY plane, the clamping fixture is set on the bottom surface of the workbench, and the clamping cylinder is located On the clamping fixture, the pair of clamping arms are located above the positioning groove, including a fixed clamping arm and a movable clamping arm, and the fixed clamping arm is fixed on the workbench. The support plate is vertically movable on the clamping frame, and the upper end of the support plate passes through the workbench, and the lower end is connected to the clamping cylinder, and the movable clamping arm is set on the The upper end of the support plate is in the same plane as the fixed clamping arm;

The sliding device includes a slide plate sliding along the X direction and an inner positioning forming master, the sliding plate is movably arranged on the workbench, and the inner positioning forming master is arranged on the sliding plate;

The rear positioning device is located on the rear oblique side of the clamping device, and includes a rear positioning rod, a rear positioning fixing frame, a rear positioning cylinder and a rear positioning cylinder fixing seat, and the rear positioning cylinder fixing seat is arranged on the frame , the rear positioning cylinder is set on the rear positioning cylinder fixing seat, the rear positioning fixing frame is connected to the piston rod of the rear positioning cylinder, the rear positioning rod is arranged on the rear positioning fixing frame, And the rear positioning rod is located on the top surface of the workbench;

The left welding positioning device and the right welding positioning device are respectively located on both sides of the clamping device;

The left welding positioning device includes a left fixed frame, a left positioning cylinder, a left positioning rod and a connecting rod. The left fixed frame is installed on the workbench, and the left positioning cylinder is arranged on the left fixed frame. The connecting rod is movably arranged on the left fixed frame, and its upper end is connected to the piston rod of the left positioning cylinder. rod one;

The right welding positioning device includes a right fixing frame, a right positioning cylinder, a right positioning rod and two connecting rods, the right fixing frame is arranged on the bottom surface of the workbench, and the right positioning cylinder is arranged at the bottom of the right fixing frame , the connecting rod two is vertically arranged on the right fixed frame, the upper end of the connecting rod two passes through the workbench, and the lower end is connected to the piston rod of the right positioning cylinder, the right positioning rod The front end surface is a concave arc surface, and is connected to the upper end of the connecting rod two through the right clamping body.

The lower part of the inner positioning forming master is connected with a moving cylinder.

The translation fixing device in the circle-circling mechanism includes two sets of sliding guides parallel to each other and arranged along the X direction, the sliding guides include a sliding guide rail arranged along the X direction and a pair of sliders adapted to the sliding guide rails, The lower part of the slider is set on the motor fixing seat, and the upper part is movably clamped on the sliding guide rail.

The positioning welding mechanism also includes a rear positioning guide plate, the rear positioning guide plate is arranged on the workbench and is located on one side of the rear positioning rod, and the rear positioning guide plate is provided with a Compatible guide surfaces.

The shearing device includes a shearing fixture, a shearing cylinder, a pair of cutters, a cutter fixing plate and a connecting arm arranged along the Z direction, and the shearing fixture is mounted on the frame and located on the working The lower part of the table, the shearing cylinder is arranged on the shearing fixed frame, the pair of cutters include a fixed cutter and a movable cutter, and the fixed cutter and the movable cutter are symmetrically arranged on the cutter On the fixed plate, the upper part of the connecting arm is connected with the movable cutter, and the lower part is connected with the shearing cylinder.

The bottom surface of the cutting edge of the fixed cutter and the movable cutter is lower than the bottom surface of the fixed clamping arm, and the top surface of the cutting edge is higher than the top surface of the fixed clamping arm.

The left positioning rod forms an included angle of 40°-50° with the Y axis.

The right positioning rod forms an included angle of 40°-50° with the Y axis.

Both the left positioning rod and the right positioning rod are welding electrodes and are made of copper.

In the utility model, one circle-circling mechanism corresponds to a plurality of positioning welding mechanisms to realize material placement, circle-circling, and positioning welding simultaneously, that is, one positioning welding mechanism completes material clamping, cutting, and internal positioning to perform circle-circling, and completes left, right, Right and rear positioning, the circular mechanism moves to the next station, the overall continuity is good, and the processing efficiency is high. At the same time, the utility model adopts one-time positioning, forming and fixing in one time according to the clamping, cutting, internal positioning, rounding, and positioning welding processes, so as to ensure good product consistency and high degree of automation.

Description of drawings

Fig. 1 is a structural representation of the utility model,

Figure 2 is a bottom view of Figure 1,

Fig. 3 is a partial enlarged schematic diagram of I place in Fig. 1,

Fig. 4 is a three-dimensional schematic diagram one of the utility model,

Fig. 5 is the three-dimensional schematic diagram two of the utility model,

Fig. 6 is a three-dimensional schematic diagram one of the moving mechanism of the present invention,

Fig. 7 is the second perspective view of the moving mechanism of the utility model,

Fig. 8 is a three-dimensional schematic diagram one of the circle-circling mechanism of the present invention,

Fig. 9 is a three-dimensional schematic diagram II of the circle-circling mechanism of the present invention,

Fig. 10 is a schematic structural view of a round seat of the present utility model,

Figure 11 is a top view of Figure 10,

Fig. 12 is a three-dimensional schematic view of a round seat of the present invention,

Fig. 13 is a schematic structural view of the clamping device of the present invention,

Figure 14 is a top view of Figure 13,

Fig. 15 is a three-dimensional schematic diagram of a clamping device of the present invention,

Fig. 16 is a three-dimensional schematic diagram II of the clamping device of the present invention,

Fig. 17 is a schematic structural view of the rear positioning device of the present invention,

Figure 18 is a top view of Figure 17,

Fig. 19 is a three-dimensional schematic view of the rear positioning device of the present invention,

Fig. 20 is a schematic structural view of the left welding positioning device of the present invention,

Figure 21 is a sectional view of A-A in Figure 20,

Fig. 22 is a schematic perspective view of the left welding positioning device of the present invention,

Fig. 23 is a schematic structural view of the right welding positioning device of the present invention,

Fig. 24 is the bottom view of 23,

Fig. 25 is a schematic perspective view of the right welding positioning device of the present invention,

Fig. 26 is a three-dimensional schematic diagram of a shearing device of the present invention;

Among the figure, 1 is a frame, 11 is a workbench, and 111 is a positioning groove;

2 is a moving mechanism, 21 is a fixed mount, 22 is a mobile motor, 23 is a transmission wheel, and 24 is a transmission belt;

3 is a circular mechanism, 31 is a circular drive motor, 32 is a motor fixing seat, 33 is a circular seat, 331 is a clamping body, 332 is a circular rod, 3321 is a circular surface, 3322 is an anti-slip guide groove, 34 is a translation fixing device, 341 is a sliding guide device, 3411 is a sliding guide rail, and 3412 is a slider;

4 is a positioning welding mechanism, 41 is a clamping device, 411 is a clamping fixture, 412 is a clamping cylinder, 413 is a support plate, 414 is a fixed clamping arm, 415 is a movable clamping arm, 42 is a shearing device, 421 is a shear fixed frame, 422 is a shear cylinder, 423 is a fixed cutter, 424 is a movable cutter, 425 is a cutter fixed plate, 426 is a connecting arm, 43 is a sliding device, 431 is a slide plate, 432 is an internal positioning Forming model, 44 is the rear positioning device, 441 is the rear positioning rod, 442 is the rear positioning fixed frame, 443 is the rear positioning cylinder, 444 is the rear positioning cylinder fixing seat, 45 is the left welding positioning device, 451 is the left fixed frame, 452 is a left positioning cylinder, 453 is a left positioning rod, 454 is a connecting rod one, 455 is a left clamping body, 46 is a right welding positioning device, 461 is a right fixed mount, 462 is a right positioning cylinder, and 463 is a right positioning rod. 464 is two connecting rods, 465 is a right clamping body, 47 is a rear positioning guide plate, and 471 is a guide surface;

5 is a lifting mechanism.

Detailed ways

As shown in Figure 1-26, the utility model includes a frame 1, and also includes a moving mechanism 2, a circle mechanism 3, at least one set of positioning welding mechanisms 4 and a pair of lifting mechanisms 5, and the positioning welding mechanism 4 is located on the On the frame 1, the frame 1 includes a workbench 11 parallel to the XY plane, the pair of lifting mechanisms 5 are arranged on the frame 1, and the circle-circling mechanism 2 is arranged on the moving mechanism 2 on, and located above the tack welding mechanism 4;

The workbench 11 is provided with a positioning groove 111 corresponding to the positioning welding mechanism 4 one by one;

The moving mechanism 2 includes a pair of fixed mounts 21, a moving motor 22, a transmission wheel 23 and a transmission belt 24 moving in the X direction. The pair of fixed mounts 21 are respectively arranged on the pair of lifting mechanisms 5 and along the The Z axis moves up and down, the moving motor 22 and the transmission wheel 23 are respectively arranged on the pair of fixed mounts 21, and the transmission belt 24 is arranged between the moving motor 22 and the transmission wheel 23;

Described circle-circle mechanism 3 comprises circle-circle drive motor 31, motor holder 32, circle-circle seat 33 and translation fixture 34, and described translation fixture 34 is located between the described pair of fixed mounts 21, and described motor is fixed The seat 32 is arranged on the translation fixing device 34, and the circular driving motor 31 is arranged on the motor fixing seat 32;

The round seat 33 includes a clamping body 331 and a round rod 332 connected together, the round rod 332 is arranged on the side of the clamping body 331, and the clamping body 331 is connected to the round rod 332. On the motor shaft of the driving motor 31, the side of the round rod 332 facing the clamping body 331 is a round surface 3321, and the round surface 3321 is provided with an anti-skid guide groove 3322, and the cross-section of the anti-skid guide groove 3322 It is triangular or arc-shaped, among which the triangular shape is preferred, so that when the rod-shaped material can be wound into a circle along the trajectory of the anti-skid guide groove 3322, on the basis of ensuring accurate guidance and positioning, the friction with the material can be reduced as much as possible. contact area, thereby reducing friction and avoiding scratching the surface layer of the round material;

The positioning welding mechanism 4 includes a clamping device 41, a shearing device 42, a sliding device 43, a rear positioning device 44, a left welding positioning device 45 and a right welding positioning device 46;

The clamping device 41 includes a clamping fixture 411, a clamping cylinder 412, a support plate 413 and a pair of clamping arms parallel to the XY plane, the clamping fixture 411 is arranged on the bottom surface of the workbench 11, The clamping cylinder 412 is arranged on the clamping fixture 411, and the pair of clamping arms are located above the positioning groove 111 and include a fixed clamping arm 414 and a movable clamping arm 415. The tight arm 414 is fixed on the workbench 11, the support plate 413 is vertically movable on the clamping frame 411 and the upper end of the support plate 413 passes through the workbench 11, and the lower end is connected to On the clamping cylinder 412, the movable clamping arm 415 is arranged on the upper end of the support plate 413 and is in the same plane as the fixed clamping arm 414, and the support plate is driven by the clamping cylinder 412 413, and then drive the movable clamping arm 415 to do X upward reciprocating motion, thereby realizing the clamping-releasing motion;

The sliding device 43 includes a sliding plate 431 sliding along the X direction and an internal positioning forming master 432, the sliding plate 431 is movably arranged on the workbench 11, and the internal positioning forming former 432 is arranged on the sliding plate 431 ;

The rear positioning device 44 is located on the rear oblique side of the clamping device 41 (wherein the first quadrant, i.e. +X, +Y quadrant is preferred), includes a rear positioning rod 441, a rear positioning fixing frame 442, a rear positioning Cylinder 443 and rear positioning cylinder fixing seat 444, described rear positioning cylinder fixing seat 444 is located on the described frame 1, and described rear positioning cylinder 443 is located on the described rear positioning cylinder fixing seat 444, and described rear positioning is fixed The frame 442 is connected to the piston rod of the rear positioning cylinder 443, the rear positioning rod 441 is arranged on the rear positioning fixed frame 442, and the rear positioning rod 441 is located on the top surface of the workbench 11;

The left welding positioning device 45 and the right welding positioning device 46 are respectively located on both sides of the clamping device 41;

The left welding positioning device 45 comprises a left fixed mount 451, a left positioning cylinder 452, a left positioning rod 453 and a connecting rod one 454, the left fixed mount 451 is arranged on the workbench 11, and the left positioning cylinder 452 is set On the left fixed frame 451, the connecting rod one 454 is movably arranged on the left fixed frame 451, and the upper end is connected to the piston rod of the left positioning cylinder 452, and the front end of the left positioning rod 453 is concave. The arc surface is connected to the connecting rod one 454 through the left clamping body 455, and the left positioning rod 453 forms an included angle of 40°-50° with the Y axis;

Described right welding positioning device 46 comprises right fixed frame 461, right positioning cylinder 462, right positioning rod 463 and connecting rod two 464, and described right fixed frame 461 is located at the bottom surface of described workbench 11, and described right positioning cylinder 462 Located at the bottom of the right fixed frame 461, the second connecting rod 464 is vertically arranged on the right fixed frame 461, the upper end of the second connecting rod 464 passes through the workbench 11, and the lower end connects the On the piston rod of the right positioning cylinder 462, the front end face of the right positioning rod 463 is a concave arc surface, connected to the upper end of the connecting rod two 464 by the right clamping body 465, the right positioning rod 463 It forms an angle of 40°-50° with the Y axis.

The lower part of the internal positioning forming master 432 is connected with a moving cylinder, and the moving cylinder drives the internal positioning forming former 432 to move up and down in the Z direction, which is convenient for taking materials and prevents the internal positioning forming former 432 from colliding with other objects. interference occurs.

The front end surface of the rear positioning rod 441 is in the shape of a concave arc to increase the contact area with the rounded material, and to withstand the rounded material to the greatest extent so as to facilitate welding and fixing.

The translation fixing device 34 in the circle-circling mechanism 3 includes two sets of sliding guides 341 parallel to each other and arranged along the X direction. Adapted slider 3412, the lower part of the slider 3412 is set on the motor fixing seat 32, and the upper part is movably clamped on the sliding guide rail 3411, so as to improve the stability of the circle-circling mechanism.

The positioning welding mechanism 4 also includes a rear positioning guide plate 47, the rear positioning guide plate 47 is arranged on the workbench 11 and is positioned at one side of the rear positioning rod 441, and the rear positioning guide plate 47 is provided with The guide surface adapted to the rear positioning rod 441 improves the positioning accuracy of the rear positioning rod.

The shearing device 42 includes a shearing fixture 421, a shearing cylinder 422, a pair of cutters, a cutter fixing plate 425 and a connecting arm 426 arranged along the Z direction, and the shearing fixture 421 is located on the machine. On the frame 1 and located at the bottom of the workbench 11, the shear cylinder 422 is arranged on the shear fixed frame 421, and the pair of cutters include a fixed cutter 423 and a movable cutter 424. The cutter 423 and the movable cutter 424 are symmetrically arranged on the cutter fixed plate 425, the upper part of the connecting arm 426 is connected with the movable cutter 424, and the lower part is connected with the shearing cylinder 422, and the fixed cutter 423 and The bottom surface of the cutting edge of the movable cutter 424 is lower than the bottom surface of the fixed clamping arm 414, and the top surface of the cutting edge is higher than the top surface of the fixed clamping arm 414, ensuring that the tail of the bar is always in a pair of cuts. Between knives, improve cutting accuracy and work efficiency.

Both the left positioning rod 453 and the right positioning rod 463 are welding electrodes and are made of copper.

The course of action of the utility model is:

1) Clamping and positioning: place the rod-shaped material in the positioning groove, and the movable clamping arm closes to the fixed clamping arm to clamp the material;

2) Shearing: The shearing device moves to cut off the excess part of the tail of the material to ensure that the distance between the outer end surface of the clamping arm and the cutting edge of the shearing device is consistent, thereby improving the consistency and stability of the circle;

3) Inner positioning: the slide plate moves in the -X direction, and the inner positioning forming master sticks to the rod-shaped material and bends the rod-shaped material;

4) Rounding: The lifting device drives the rounding seat down, and the anti-skid guide groove on the rounding seat is close to the outer wall of the material to be rounded. Under the action of the rounding drive motor, the rounding seat rotates and the material Wound into a circular ring, and the tail of the rod-shaped material is in contact with the rod body;

5) Positioning and welding: the rear positioning rod, left positioning rod and right positioning rod are stretched out under the action of the cylinder to form a three-point support, which supports the material after the circle, moves up the circle seat, and the left welding positioning device and the right The welding positioning device is energized to form a welding point at the tail of the round material to achieve final fixation;

6) Remove the material: After welding and fixing, the rear positioning rod, left positioning rod and right positioning rod are retracted, the inner positioning forming master moves downward, and the movable clamping arm moves towards the +X direction to loosen the material and remove it. The material and the slide plate move in the +X direction to complete the reset; complete.

Claims (9)

1. Automatic circle-circling system, comprising a frame, characterized in that it also includes a moving mechanism, a circle-circling mechanism, at least one set of positioning welding mechanisms and a pair of lifting mechanisms, the positioning welding mechanisms are arranged on the frame, and the The frame includes a workbench parallel to the XY plane, the pair of lifting mechanisms are arranged on the frame, the circle-circling mechanism is arranged on the moving mechanism and is located above the positioning welding mechanism; The workbench is provided with positioning grooves corresponding to the positioning welding mechanism one by one; The moving mechanism includes a pair of fixed frames, a moving motor, a transmission wheel, and a transmission belt moving along the X direction. The pair of fixed frames are respectively arranged on the pair of lifting mechanisms and move up and down along the Z axis. , the mobile motor and the transmission wheel are respectively arranged on the pair of fixed frames, and the transmission belt is arranged between the mobile motor and the transmission wheel; The circle-circling mechanism includes a circle-circle driving motor, a motor fixing seat, a circle-circling seat and a translation fixing device, the translation fixing device is arranged between the pair of fixing frames, and the motor fixing seat is arranged on the translation fixing On the device, the circular driving motor is arranged on the motor fixing seat; The circular seat includes a clamping body and a circular rod connected together, the circular rod is arranged on the side of the clamping body, and the clamping body is connected to the motor shaft of the circular drive motor , the side of the round rod facing the clamping body is a round surface, the round surface is provided with an anti-slip guide groove, and the cross-section of the anti-slip guide groove is triangular or arc-shaped; The positioning welding mechanism includes a clamping device, a shearing device, a sliding device, a rear positioning device, a left welding positioning device and a right welding positioning device; The clamping device includes a clamping fixture, a clamping cylinder, a support plate and a pair of clamping arms parallel to the XY plane, the clamping fixture is set on the bottom surface of the workbench, and the clamping cylinder is located On the clamping fixture, the pair of clamping arms are located above the positioning groove, including a fixed clamping arm and a movable clamping arm, and the fixed clamping arm is fixed on the workbench. The support plate is vertically movable on the clamping frame, and the upper end of the support plate passes through the workbench, and the lower end is connected to the clamping cylinder, and the movable clamping arm is set on the The upper end of the support plate is in the same plane as the fixed clamping arm; The sliding device includes a slide plate sliding along the X direction and an inner positioning forming master, the sliding plate is movably arranged on the workbench, and the inner positioning forming master is arranged on the sliding plate; The rear positioning device is located on the rear oblique side of the clamping device, and includes a rear positioning rod, a rear positioning fixing frame, a rear positioning cylinder and a rear positioning cylinder fixing seat, and the rear positioning cylinder fixing seat is arranged on the frame , the rear positioning cylinder is set on the rear positioning cylinder fixing seat, the rear positioning fixing frame is connected to the piston rod of the rear positioning cylinder, the rear positioning rod is arranged on the rear positioning fixing frame, And the rear positioning rod is located on the top surface of the workbench; The left welding positioning device and the right welding positioning device are respectively located on both sides of the clamping device; The left welding positioning device includes a left fixed frame, a left positioning cylinder, a left positioning rod and a connecting rod. The left fixed frame is installed on the workbench, and the left positioning cylinder is arranged on the left fixed frame. The connecting rod is movably arranged on the left fixed frame, and its upper end is connected to the piston rod of the left positioning cylinder. rod one; The right welding positioning device includes a right fixing frame, a right positioning cylinder, a right positioning rod and two connecting rods, the right fixing frame is arranged on the bottom surface of the workbench, and the right positioning cylinder is arranged at the bottom of the right fixing frame , the connecting rod two is vertically arranged on the right fixed frame, the upper end of the connecting rod two passes through the workbench, and the lower end is connected to the piston rod of the right positioning cylinder, the right positioning rod The front end surface is a concave arc surface, and is connected to the upper end of the connecting rod two through the right clamping body. 2. The automatic circle-circling system according to claim 1, characterized in that the lower part of the inner positioning forming master is connected with a moving cylinder. 3. The automatic circle-circling system according to claim 1, wherein the translation fixing device in the circle-circling mechanism includes two sets of sliding guides parallel to each other and arranged along the X direction, and the slide guides include The sliding guide rail and a pair of sliding blocks adapted to the sliding guide rail are provided, the lower part of the sliding block is arranged on the motor fixing seat, and the upper part is movably clamped on the sliding guide rail. 4. The automatic circle-circling system according to claim 1, characterized in that, the positioning welding mechanism further comprises a rear positioning guide plate, and the rear positioning guide plate is arranged on the workbench and located on the rear positioning On one side of the rod, the rear positioning guide plate is provided with a guide surface adapted to the rear positioning rod. 5. The automatic circle-rounding system according to claim 1, wherein the shearing device comprises a shearing fixture, a shearing cylinder, a pair of cutters, a cutter fixing plate and a connecting arm arranged along the Z direction , the shearing fixture is set on the frame and is located at the lower part of the workbench, the shearing cylinder is arranged on the shearing fixture, and the pair of cutters include a fixed cutter and a movable cutter. The fixed cutter and the movable cutter are symmetrically arranged on the fixed cutter plate, the upper part of the connecting arm is connected with the movable cutter, and the lower part is connected with the shearing cylinder. 6. The automatic rounding system according to claim 5, characterized in that, the bottom surface of the cutting edge of the fixed cutter and the movable cutter is lower than the bottom surface of the fixed clamping arm, and the top surface of the cutting edge is high on the top surface of the fixed clamping arm. 7. The automatic circle-circling system according to claim 1, characterized in that, the left positioning rod forms an included angle of 40°-50° with the Y axis. 8. The automatic circle-circling system according to claim 1, characterized in that, the right positioning rod forms an included angle of 40°-50° with the Y axis. 9. The automatic circle-rounding system according to claim 1, characterized in that, both the left positioning rod and the right positioning rod are welding electrodes made of copper.