CN114227009A

CN114227009A - Metal pipe tensioning and circular cutting device and method

Info

Publication number: CN114227009A
Application number: CN202111654268.3A
Authority: CN
Inventors: 陈金祥; 肖涛; 高垒; 袁伟涛; 邹凡; 赖胜鹏; 林小波; 杨小君; 朱建海
Original assignee: Guangdong Zhongke Weijing Photonics Manufacturing Technology Co ltd
Current assignee: Guangdong Zhongke Weijing Photonics Manufacturing Technology Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-03-25
Anticipated expiration: 2041-12-30
Also published as: CN114227009B

Abstract

The invention discloses a metal pipe tensioning and circular cutting device which comprises an automatic feeding and discharging mechanism, a clamping and tensioning mechanism and a laser cutting mechanism, wherein the clamping and tensioning mechanism comprises a first linear motor module, a fine adjustment assembly, a middle connection assembly and a reference assembly, wherein the fine adjustment assembly, the middle connection assembly and the reference assembly are sequentially connected onto the first linear motor module in a sliding manner; the fine adjustment assembly, the middle connection assembly and the reference assembly receive the metal pipe conveyed by the automatic feeding and discharging mechanism, the fine adjustment assembly or the reference assembly is switched to a torque mode and moves to tension the metal pipe, the fine adjustment assembly and the reference assembly rotate synchronously to achieve circular cutting of the metal pipe, and the middle connection assembly clamps and supports the metal pipe all the time in the circular cutting process, so that the fine metal pipe can be maintained to rotate stably, radial runout of a pipe fitting is small, and the machined surface of the pipe fitting is guaranteed to be maintained in a laser focus range. The invention also discloses a metal tube tensioning and circular cutting method.

Description

Metal pipe tensioning and circular cutting device and method

Technical Field

The invention relates to the technical field of laser cutting, in particular to a tensioning and circular cutting device and a tensioning and circular cutting method for depth setting processing of an ultra-fine metal pipe fitting.

Background

As is well known, the ratio of the length to the diameter (namely the length-diameter ratio) of a cylindrical body material to a tubular body material cannot be too large, otherwise the cylindrical body material is easy to deform due to the self gravity, so that the cylindrical body material swings like a skipping rope in the rotating process, and cannot keep a stable posture.

The existing laser rotary cutting processing equipment cannot achieve good positioning on an ultra-thin metal pipe, particularly a metal pipe with the diameter less than 1mm, and the ultra-thin metal pipe is easy to deform to cause radial run-out in the processing process, so that the processing position deviates from a laser focus, and the processing effect cannot be achieved.

Therefore, it is necessary to provide a tensioning and circular cutting device and a tensioning and circular cutting method capable of maintaining the stable rotation of the ultra-fine metal pipe, making the radial run-out of the pipe small, and maintaining the processing surface within the laser focus range, so as to solve the above problems.

Disclosure of Invention

The invention aims to provide a metal pipe tensioning and ring cutting device which can maintain stable rotation of an ultra-fine metal pipe, make radial runout of the pipe small and maintain the processing surface of the pipe within a laser focus range.

Another object of the present invention is to provide a method for tensioning and girdling a metal pipe, which can maintain a stable rotation of an ultra-fine metal pipe, minimize radial run-out of the pipe, and maintain a working surface of the pipe within a laser focus range.

In order to achieve the purpose, the technical scheme of the invention is as follows: the metal pipe tensioning and circular cutting device comprises an automatic feeding and discharging mechanism, a clamping and tensioning mechanism and a laser cutting mechanism, wherein the clamping and tensioning mechanism comprises a first linear motor module, a fine adjustment assembly, a middle connection assembly and a reference assembly which are sequentially connected onto the first linear motor module in a sliding mode, and one of the fine adjustment assembly and the reference assembly has a position mode and a moment mode; the fine adjustment assembly comprises a first direct-drive rotary table and a first electric paw arranged on the side part of the first direct-drive rotary table; the reference assembly comprises a second direct-drive rotary table and a second electric paw, the second direct-drive rotary table is arranged opposite to the first direct-drive rotary table, and the second electric paw is arranged in parallel with the first electric paw; the middle connection component comprises a third electric paw which is arranged in parallel with the first electric paw and the second electric paw; the first electric gripper, the second electric gripper and the third electric gripper are used for receiving the metal pipe conveyed by the automatic feeding and discharging mechanism, when the first direct-drive rotary table and the second direct-drive rotary table clamp the metal pipe, the fine-tuning assembly or the reference assembly is switched to a torque mode and moves to tension the metal pipe, the metal pipe is circularly cut through synchronous rotation of the first direct-drive rotary table and the second direct-drive rotary table, and the third electric gripper always clamps and supports the metal pipe in the circular cutting process.

Preferably, the first linear motor module extends along the X-axis direction; the first direct-drive rotary table and the second direct-drive rotary table are oppositely arranged along the X-axis direction, the first electric paw, the second electric paw and the third electric paw are arranged in parallel along the X-axis direction, and the first electric paw, the second electric paw and the third electric paw can move along the Y-axis direction.

Preferably, the fine tuning assembly further includes a fine tuning module, the fine tuning module is connected to the first direct-drive turntable and can drive the first direct-drive turntable to move along the X-axis or Y-axis direction, and the fine tuning module drives the first direct-drive turntable to move so as to calibrate the position of the first direct-drive turntable.

Preferably, the intermediate engagement assembly is movable along the X-axis direction to allow the third electric gripper to grip a position of the metal pipe to be laser-cut.

Preferably, the metal pipe tensioning and ring cutting device further comprises a moving platform capable of moving along the X-axis and Y-axis directions, the first linear motor module is mounted on the moving platform, the first electric gripper, the second electric gripper and the third electric gripper can receive the metal pipe conveyed by the automatic feeding and discharging mechanism through the movement of the moving platform, and the metal pipe clamped and tensioned by the first direct-drive turntable and the second direct-drive turntable can be moved to the position below the laser cutting mechanism for processing.

Preferably, the moving platform is further provided with a guide rail extending along the X-axis direction, and the fine adjustment assembly and the reference assembly are both connected to the guide rail in a sliding manner.

Preferably, the automatic loading and unloading mechanism comprises a second linear motor module, a third linear motor module and a plurality of clamping jaw assemblies; the second linear motor module is arranged above the first linear motor module and extends along the Y-axis direction; the third linear motor module is arranged on the second linear motor module and extends along the X-axis direction; the clamping jaw assemblies are arranged on the third linear motor module at intervals, and each clamping jaw assembly can stretch out and draw back along the vertical direction; and the second linear motor module and the third linear motor module drive the clamping jaw assemblies to synchronously move so as to convey the metal pipe to the upper part of the clamping and tensioning mechanism or output the processed metal pipe.

Preferably, the clamping jaw assembly comprises a driving part, a sliding rail and a clamping jaw, the sliding rail is mounted on the third linear motor module and extends along the vertical direction, the clamping jaw is connected to the sliding rail in a sliding mode, and the driving part is connected with the clamping jaw and used for driving the clamping jaw to move up and down along the sliding rail.

Preferably, the metal pipe tensioning and circular cutting device further comprises a buffer bin, the buffer bin is arranged on one side of the clamping and tensioning mechanism and is located below the automatic feeding and discharging mechanism, and the buffer bin is used for storing the metal pipe to be cut and cut.

Correspondingly, the invention also discloses a metal tube girdling and tensioning method using the metal tube tensioning and girdling device, which comprises the following steps:

(1) controlling a clamping jaw assembly of the automatic feeding and discharging mechanism to synchronously move so as to clamp the metal pipe and transfer the metal pipe to the upper part of the moving platform;

(2) controlling a first electric paw, a second electric paw and a third electric paw of the clamping and tensioning mechanism to synchronously extend out and clamp the metal pipe;

(3) driving the fine adjustment assembly to move a certain distance towards the direction of the metal pipe so that the first direct-drive rotating table penetrates into one end of the metal pipe, and then controlling the first direct-drive rotating table to be closed and clamping one end of the metal pipe at constant pressure;

(4) the control reference assembly moves a certain distance towards the direction of the metal pipe so that the second direct-drive rotary table penetrates into the other end of the metal pipe, and then the second direct-drive rotary table is controlled to be closed and clamps the other end of the metal pipe at constant pressure;

(5) controlling a clamping jaw assembly of the automatic loading and unloading mechanism to loosen the metal pipe and return;

(6) controlling the first electric gripper and the second electric gripper to release the metal pipe and retract to a safe position;

(7) the fine adjustment assembly is controlled to be switched from a position mode to a torque mode, the fine adjustment assembly is driven to slowly move along the axial direction of the metal pipe by constant torque, the metal pipe is gradually tensioned, and the fine adjustment assembly is controlled to stop moving when the tension of the metal pipe is balanced with the tension of the metal pipe;

(8) controlling the first direct-drive rotary table and the second direct-drive rotary table to synchronously rotate;

(9) and controlling the moving platform to move so as to transfer the metal pipe to the lower part of the laser cutting mechanism, and enabling the metal pipe to be located at the laser focus position for circular cutting.

Compared with the prior art, the metal pipe tensioning and circular cutting device has the advantages that the clamping and tensioning mechanism is provided with the fine adjustment assembly, the middle connection assembly and the reference assembly which are sequentially arranged, the fine adjustment assembly is provided with the first direct-drive rotary table and the first electric paw, the reference assembly is provided with the second direct-drive rotary table and the second electric paw, and the middle connection assembly is provided with the third electric paw; while the fine tuning assembly or the reference assembly is provided with a position mode and a moment mode. Therefore, the metal pipe is received and clamped through the first electric paw, the second electric paw and the third electric paw, and straightening of two ends of the metal pipe can be achieved; the first direct-drive rotary table and the second direct-drive rotary table are accurately aligned to two ends of the metal pipe through the movement of the fine adjustment assembly and the movement of the reference assembly, so that the rapid material penetration is realized, and the processing effect is improved; secondly, the two ends of the metal pipe are respectively clamped by the first direct-drive rotary table and the second direct-drive rotary table, and one of the first direct-drive rotary table and the second direct-drive rotary table outputs constant tension to axially pull the metal pipe under the condition of keeping the product not deformed by switching a fine-tuning assembly or a reference assembly from a position mode to a moment mode, so that the metal pipe is gradually tensioned, and the metal pipe is prevented from being deformed due to overlarge or undersize tension; and moreover, the first direct-drive rotary table and the second direct-drive rotary table synchronously rotate at a constant rotating speed in the state of tensioning the metal pipe, and meanwhile, the third electric claw clamps and supports the middle part of the metal pipe, so that the metal pipe is prevented from easily generating radial run-out, the problem that a processing point caused by soft deformation of the metal pipe is not in a laser focus is effectively solved, and the circular cutting processing process of the metal pipe is more stable and reliable. In conclusion, the metal pipe tensioning and ring cutting device has the characteristics of accurate position and fine regulation and control, and provides a more precise, more stable and more reliable processing mode for the laser depth setting processing of the ultra-thin metal pipe and similar products.

Correspondingly, the metal tube ring cutting and tensioning method using the metal tube tensioning and ring cutting device of the invention also has the same technical effects.

Drawings

FIG. 1 is a schematic structural view of the metal pipe tensioning and ring cutting apparatus of the present invention.

Fig. 2 is a schematic structural view of the automatic loading and unloading mechanism in fig. 1.

Fig. 3 is a schematic view of the clamping and tensioning mechanism of fig. 1.

Fig. 4 is a schematic view of fig. 3 at another angle after the first and second drive mechanisms are removed.

Fig. 5 is a schematic structural diagram of the fine adjustment assembly in fig. 4.

Fig. 6 is a schematic structural view of the fiducial assembly of fig. 4.

FIG. 7 is a schematic view of the intermediate adapter assembly of FIG. 4.

Fig. 8 is a top view of fig. 4.

FIG. 9 is a schematic view showing a state where the automatic loading and unloading mechanism of the present invention transports a metal tube to a position above a movable platen.

FIG. 10 is a schematic view of the clamping and tensioning mechanism of the present invention receiving a metal tube.

FIG. 11 is a schematic top view of the clamping and tensioning mechanism of the present invention.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements. The metal pipe tensioning and ring cutting device 1 and the tensioning and ring cutting method provided by the invention are particularly suitable for fixed-depth processing of metal pipes with the lengths of 200mm-800mm and the diameters of 0.2mm-1mm, namely, are mainly suitable for processing modes without cutting, but are not limited to the above, and can be also used for precisely processing other metal pipe fittings with flexible characteristics and similar products.

Referring to fig. 1-11, the metal pipe tensioning and circular cutting apparatus 1 of the present invention comprises a base 100, and an automatic loading and unloading mechanism 200, a clamping and tensioning mechanism 300, and a laser cutting mechanism 400 mounted thereon. Wherein, the laser cutting mechanism 400 is fixed at one end of the base 100, and a processing area is arranged below the laser cutting mechanism 400; the clamping and tensioning mechanism 300 is movably arranged on the base 100 and can move to the position below the laser cutting mechanism 400, the metal pipe is clamped, fixed and tensioned through the clamping and tensioning mechanism 300, and then the metal pipe is conveyed to a machining area for circular cutting machining; the automatic loading and unloading mechanism 200 is disposed at one side of the clamping and tensioning mechanism 300, and is used for conveying the metal pipes to be processed to the clamping and tensioning mechanism 300 one by one, and removing the processed metal pipes from the clamping and tensioning mechanism 300.

With continued reference to fig. 1, in the present invention, the laser cutting mechanism 400 has a laser processing assembly 410 disposed above the base 100, the light emitting direction of the laser processing assembly 410 is vertical to the downward direction, and the processing area is located below the laser processing assembly 410; when the metal pipe is transferred to the processing area, the laser output from the laser processing assembly 410 may process the metal pipe. The structure and principle of the rest of the laser cutting mechanism 400 in the present invention are conventional in the art and therefore will not be described in detail.

With reference to fig. 1, the metal pipe tensioning and circular cutting device 1 of the present invention further includes a buffer bin 500, the buffer bin 500 is disposed at one side of the clamping and tensioning mechanism 300, the buffer bin 500 is used for storing the metal pipe to be processed and finished, and the metal pipe is moved back and forth between the buffer bin 500 and the clamping and tensioning mechanism 300 by the automatic loading and unloading mechanism 200 to realize loading and unloading of the metal pipe.

In one embodiment of the present invention, there are two buffer bins 500, two buffer bins 500 are disposed in an upper-lower structure, and each buffer bin 500 can reciprocate along the X-axis direction, and a linear motor module or other driving mechanism can be used to drive the buffer bins 500 to reciprocate, which are conventional ways known to those skilled in the art and will not be described in detail herein. In addition, all be equipped with a plurality of constant head tanks or other location structures that are used for holding the tubular metal resonator on every buffering storehouse 500 simultaneously, make every buffering storehouse 500 once can carry a plurality of tubular metals to improve machining efficiency.

More specifically, when the two buffer bins 500 of the present invention are in operation, one of the buffer bins 500 full of metal tubes to be processed is moved to one side of the clamping and tensioning mechanism 300, for example, the buffer bin 500 located at the upper layer shown in fig. 1 is moved to one side of the clamping and tensioning mechanism 300, then the metal tubes thereon are transferred to the clamping and tensioning mechanism 300 one by the automatic loading and unloading mechanism 200, and are transported to the processing area by the clamping and tensioning mechanism 300 for processing, and after the processing is completed, the processed metal tubes are transferred back to the original position of the buffer bin 500 by the automatic loading and unloading mechanism 200, and thus the processing is performed repeatedly.

After all the metal pipes on the upper-layer cache bin 500 are processed, the upper-layer cache bin 500 moves forwards along the X axis to perform blanking; meanwhile, the lower buffer bin 500 is fully loaded with the metal pipe to be processed and moves to one side of the clamping and tensioning mechanism 300 in the negative direction of the X-axis, and then repeats the above-described processing process.

According to the invention, through the reciprocating alternation of the two buffer bins 500, the whole metal pipe tensioning and ring cutting device 1 can be ensured to be always in a processing state, so that the processing effect is improved. Understandably, the number of the cache bins 500 is not limited in this embodiment, and only one or more cache bins 500 may be provided.

Referring now to fig. 1 and 3-11, the clamping and tensioning mechanism 300 of the present invention includes a movable platform 310, a first linear motor module 320, a fine adjustment assembly 330, a reference assembly 340, and an intermediate engagement assembly 350. Wherein the moving platform 310 is movably mounted to the base 100. Referring to fig. 1 and 3, the movable platform 310 can move along the X-axis and Y-axis directions, and the metal pipe is moved to a processing area below the laser cutting mechanism 400 for processing by the movement of the movable platform 310, and the processed metal pipe is moved to a position below the automatic loading and unloading mechanism 200. The first linear motor module 320 is installed on the moving platform 310, the fine tuning assembly 330, the middle connecting assembly 350, and the reference assembly 340 are respectively connected to the first linear motor module 320, and the middle connecting assembly 350 is disposed between the fine tuning assembly 330 and the reference assembly 340, and the first linear motor module 320 can respectively drive the three to move along the X-axis direction. The fine adjustment assembly 330 and the reference assembly 340 are used for clamping two ends of a metal pipe and tensioning the metal pipe, the fine adjustment assembly 330 and the reference assembly 340 are also used for driving the metal pipe to rotate so as to achieve circular cutting, the middle connection assembly 350 is used for clamping and supporting the middle of the metal pipe so as to keep supporting in the circular cutting process of the metal pipe, radial runout of the metal pipe is reduced, and the problem that a processing point caused by soft deformation of the metal pipe is not in a laser focus is effectively solved.

With continued reference to fig. 3-4 and 8, the first linear motor module 320 includes a stator assembly 324, and a first linear motor 321, a second linear motor 322, and a third linear motor 323 slidably connected to the stator assembly 324, wherein the stator assembly 324 extends along the X-axis direction, the fine tuning assembly 330 is connected to the first linear motor 321, the reference assembly 340 is connected to the second linear motor 322, and the intermediate engaging assembly 350 is connected to the third linear motor 323, and the first linear motor module 320 can independently control the first linear motor 321, the second linear motor 322, and the third linear motor 323 to move along the stator assembly 324, so as to respectively drive the fine tuning assembly 330, the intermediate engaging assembly 350, and the reference assembly 340 to reciprocate along the X-axis direction.

With continued reference to fig. 1 and 3, the clamping and tensioning mechanism 300 further includes a first driving mechanism 360 and a second driving mechanism 370, the first driving mechanism 360 is installed below the moving platform 310 and is used for driving the moving platform 310 to move along the X-axis direction, and the second driving mechanism 370 is installed on the base 100 and connected to the first driving mechanism 360 and is used for driving the moving platform 310 to move along the Y-axis direction. The first driving mechanism 360 and the second driving mechanism 370 are preferably linear motor modules, but not limited thereto, and both may also adopt other driving forms, for example, a combination of a motor, a lead screw nut, and the like.

Referring to fig. 3-5 and 8-11, the fine adjustment assembly 330 includes a first slide table 331, a first direct-drive table 332, a first electric gripper 333 and a fine adjustment module 334. The first sliding table 331 is connected to the first linear motor 321 of the first linear motor module 320, the first direct-drive rotating table 332 is mounted on the first sliding table 331, and the axial direction of the rotating shaft of the first direct-drive rotating table is arranged along the X axis, the first direct-drive rotating table 332 is provided with a first clamping jaw 3321 capable of clamping a metal pipe, as shown in fig. 5, the metal pipe can be penetrated when the first clamping jaw 3321 is opened, the metal pipe can be clamped after the first clamping jaw 3321 is closed, the metal pipe is clamped by the first clamping jaw 3321 with constant pressure, and the pressure of the first clamping jaw 3321 can be preset and adjusted according to different metal pipes or other products; meanwhile, the first direct-drive rotary table 332 rotates to drive the metal pipe clamped by the first direct-drive rotary table to rotate so as to realize circular cutting. The fine adjustment module 334 is installed on the first sliding table 331 and connected to the first direct-drive rotating table 332, and is configured to drive the first direct-drive rotating table 332 to move along the X-axis and Y-axis directions for fine adjustment, so that the first clamping jaw 3321 of the first direct-drive rotating table 332 can be aligned to the center of the metal pipe, and the metal pipe can be inserted into the first clamping jaw 3321. It should be noted that the fine adjustment module 334 mainly adjusts the position of the first direct-drive rotating table 332 at a debugging stage before continuous production, and drives the first direct-drive rotating table 332 to move through the fine adjustment module 334 so as to enable the center of the first clamping jaw 3321 and the center of a clamping jaw (described in detail later) of the automatic loading and unloading mechanism 200 to be located on the same straight line, as shown in fig. 10-11, and then fixes the position of the first direct-drive rotating table 332, so that the penetration of the metal pipe can be realized only by driving the first direct-drive rotating table 332 to translate along the X-axis direction in the continuous production process, thereby improving the production efficiency. Understandably, the fine adjustment module 334 is not limited to adjustment before production, but can be used to adjust the position of the first direct drive turntable 332 at any time. The first electric gripper 333 is mounted on the first sliding table 331 through the first driving element 335, the first driving element 335 can drive the first electric gripper 333 to move along the Y-axis direction, as shown in fig. 5, the first electric gripper 333 can adjust the opening and closing size as required, and the metal pipe is clamped by the first electric gripper 333 to be straightened, so that the metal pipe to be machined is pre-positioned before passing, and the metal pipe to be machined is penetrated into the first electric gripper 3321 through the center of the first clamping jaw, and after the passing is completed, the first electric gripper 333 can loosen the metal pipe and return to a safe position.

Referring to fig. 3-4, 6 and 8-11, the reference assembly 340 includes a second sliding table 341, a second direct-drive turntable 342 and a second electric gripper 343. The second sliding table 341 is connected to the second linear motor 322 of the first linear motor module 320, the second direct-drive turntable 342 is mounted on the second sliding table 341 and is arranged opposite to the first direct-drive turntable 332, specifically, the second direct-drive turntable 342 and the first direct-drive turntable 332 are arranged opposite to each other along the X-axis direction, correspondingly, the second direct-drive turntable 342 is provided with a second clamping jaw 3421 capable of clamping a metal pipe, the second clamping jaw 3421 can be penetrated by the metal pipe when opened, the metal pipe can be clamped after the second clamping jaw 3421 is closed, the second clamping jaw 3421 clamps the metal pipe with constant pressure, and the pressure of the second clamping jaw 3421 can be preset and adjustable according to different metal pipes or other products; meanwhile, the second direct-drive rotary table 342 and the first direct-drive rotary table 332 synchronously rotate to drive the metal pipes clamped by the second direct-drive rotary table and the first direct-drive rotary table 332 to rotate so as to realize circular cutting. The second electric claw 343 is mounted on the second sliding table 341 through the second driving member 344, the second driving member 344 can drive the second electric claw 343 to move along the Y-axis direction, as shown in fig. 6, and the second electric claw 343 and the first electric claw 333 are arranged in parallel along the X-axis direction, as shown in fig. 8 to 11, the second electric claw 343 can also adjust the opening and closing size as required, and clamp the metal pipe through the second electric claw 343 to straighten the metal pipe, so as to perform the pre-positioning before the piercing, so that the metal pipe to be processed penetrates into the second electric claw 3421 through the center of the second clamping jaw, and after the piercing is completed, the second electric claw 343 can release the metal pipe and return to the safety position.

In the preferred embodiment of the present invention, in combination with the above description, the first clamping jaw 3321 of the first direct drive turntable 332 and the second clamping jaw 3421 of the second direct drive turntable 342 may further be provided with a guiding structure, such as a trumpet-shaped structure, a bevel structure, etc., to facilitate the introduction of the end of the metal pipe, thereby facilitating the penetration of the metal pipe.

Referring to fig. 1 to 11 again, when deep cutting is performed on a product having a flexible characteristic, such as an ultra-thin metal tube, the product needs to be tensioned and straightened, so that the subsequent processing operation is facilitated. Therefore, the present invention utilizes the cooperation of the fine adjustment assembly 330 and the reference assembly 340 to clamp the two ends of the metal pipe, and then utilizes one of the two assemblies to tension the metal pipe.

In one embodiment, the tensioning of the metal tube is accomplished using the datum assembly 340 as a datum axis for the machining and the trim assembly 330. Specifically, the fine adjustment assembly 330 is provided with a position mode and a moment mode, and specifically, the first linear motor 321 is used for switching between the position mode and the moment mode, when the first linear motor 321 works in the position mode, the first linear motor drives the fine adjustment assembly 330 to move along the X-axis direction to realize the material passing of the metal pipe, and when the first linear motor 321 is switched to the moment mode, the first linear motor 321 drives the fine adjustment assembly 330 to move along the axial direction (positive direction or negative direction of the X-axis) of the metal pipe with a constant moment until the metal pipe is tensioned.

Understandably, the fine adjustment assembly 330 can also serve as a reference axis, while the reference assembly 340 has a position mode and a moment mode, as well as can achieve the tensioning of the metal tube.

More specifically, the tension required to stretch the ends of the product during tensioning is different for different types/types of metal pipe or other flexible products. According to the invention, the magnitude of the tension force during tensioning is obtained in advance through calculation or test according to the difference of the elastic modulus and the bearable strain force of different products, and the tension force is prestored in a control system. In the tensioning process, the control system controls the first linear motor 321 to move according to the preset tension, so that the preset tension is accurately applied to two ends of the product, and the product can be straightened without deformation.

With reference to fig. 3-4, 7, and 8-11, the intermediate engaging assembly 350 includes a third sliding table 351 and a third electric claw 352, the third sliding table 351 is connected to the third linear motor 323 of the first linear motor module 320, the third electric claw 352 is mounted on the third sliding table 351 through a third driving member 353, the third driving member 353 can drive the third electric claw 352 to move along the Y-axis direction, and the third electric claw 352 is juxtaposed to the first electric claw 333 and the second electric claw 343 along the X-axis direction, as shown in fig. 8-11.

Referring to fig. 8-11, a straight line L1 along which the centers of the first electric gripper 333, the second electric gripper 343, and the third electric gripper 352 are located is parallel to or aligned with a straight line L2 along which the centers of the first direct drive turntable 332 and the second direct drive turntable 342 are located. More specifically, when the first electric gripper 333, the second electric gripper 343, and the third electric gripper 352 move to the safety position, a straight line L1 where the centers of the three grippers are located is parallel to a straight line L2 where the centers of the first direct drive turntable 332 and the second direct drive turntable 342 are located, as shown in fig. 8. When the first electric gripper 333, the second electric gripper 343 and the third electric gripper 352 move to the clamping position along the Y axis in the negative direction, a straight line L1 where the centers of the three grippers are located, a straight line L2 where the center of the first direct-drive turntable 332 and the center of the second direct-drive turntable 342 are located, are located on the same straight line, that is, the centers of the three grippers are moved to the position shown by a straight line L2 in fig. 8, so that the three can clamp the metal pipe on the automatic loading and unloading mechanism 200, the state at this time is shown in fig. 10-11, the first electric gripper 333 and the second electric gripper 343 clamp the two ends of the metal pipe for straightening, and the third electric gripper 352 clamps the middle part of the metal pipe for preventing the metal pipe from bending, as shown in fig. 10-11; after the metal pipe is threaded into the first direct drive turntable 332 and the second direct drive turntable 342, the first electric gripper 333 and the second electric gripper 343 are released and retracted to the safety position, that is, both are retracted to the position shown by the straight line L1 in fig. 8.

In addition, when the first electric gripper 333, the second electric gripper 343, and the third electric gripper 352 clamp the metal pipe, the three are not completely clamped, and a certain space is reserved to allow the metal pipe to freely move. In the process of rotary circular cutting, the third electric claw 352 always clamps and supports the metal pipe, the metal pipe is guaranteed to be rotatable, the support of the third electric claw 352 enables the radial runout of the surface of the metal pipe nearby to be smaller than the laser focal depth (the laser focal depth is 0.2mm), and under the condition, the laser beam acts on the surface of the metal pipe, so that a good depth-fixing machining effect is achieved.

More specifically, in the present invention, the first linear motor module 320 drives the third linear motor 323 to move along the X-axis direction, so as to drive the third electric gripper 352 to move to a position of the metal pipe to be laser-cut and to clamp and support, that is, after each position is processed, the third electric gripper 352 is moved to the next position and to clamp and support, then the laser is turned on to process, and so on, thereby reducing the radial run-out degree of the metal pipe, and making the processing process more stable and reliable.

In the present invention, the first electric gripper 333, the second electric gripper 343, and the third electric gripper 352 are preferably formed by a non-metal wear-resistant material, so as to prevent the surface of the metal pipe from being damaged.

Referring to fig. 1 and fig. 3 to 4 again, in a preferred embodiment of the present invention, a guide rail 311 extending along the X-axis direction is further disposed on the movable platform 310, and the first sliding table 331 and the second sliding table 341 are slidably connected to the guide rail 311, so as to facilitate the movement adjustment of the fine adjustment assembly 330 and the reference assembly 340 along the X-axis direction.

Referring now to fig. 1-2, the automatic loading and unloading mechanism 200 includes a clamping jaw assembly 210, a second linear motor module 220, and a third linear motor module 230. The second linear motor module 220 is disposed above the first linear motor module 320 and extends along the X-axis direction, the plurality of clamping jaw assemblies 210 are disposed on the second linear motor module 220 at intervals, the second linear motor module 220 can respectively drive each clamping jaw assembly 210 to move along the X-axis direction, and each clamping jaw assembly 210 can extend and retract along the vertical direction. The third linear motor module 230 is connected to the second linear motor module 220 and extends along the Y-axis direction, and the third linear motor module 230 drives the second linear motor module 220 to reciprocate along the Y-axis direction, so as to realize the reciprocating movement of each clamping jaw assembly 210 between the clamping and tensioning mechanism 300 and the buffer storage bin 500.

As shown in fig. 2, in an embodiment of the present invention, three clamping jaw assemblies 210 are provided, and the three clamping jaw assemblies 210 are spaced apart from each other and are disposed on a second linear motor module 220 to clamp two ends and a middle portion of a metal pipe for transportation, so as to prevent the metal pipe from bending. Understandably, the number of the jaw assemblies 210 is not limited to three, but may be flexibly set according to the length of the metal pipe.

In the present invention, the three jaw assemblies 210 are identical in construction. Specifically, the clamping jaw assembly 210 includes a fourth driving part 211, a vertical slide rail 212, a connecting block 213 and a feeding clamping jaw 214, the vertical slide rail 212 is installed on the second linear motor module 220 and extends along the vertical direction, the connecting block 213 is slidably connected to the vertical slide rail 212, the feeding clamping jaw 214 is installed at the lower end of the connecting block 213 and is connected with the fourth driving part 211, and the fourth driving part 211 drives the feeding clamping jaw 214 to move up and down along the vertical slide rail 212.

The operation and process of the metal pipe ring cutting and tensioning device 1 of the present invention will now be described with reference again to figures 1-11.

In the first step, the metal pipe 2 is loaded. With particular reference to fig. 1-2 and 9-10, a buffer magazine 500 is fully loaded with the metal tubes 2 to be machined and moved to the side of the clamping and tensioning mechanism 300, as shown in fig. 1; then, the third linear motor module 230 drives the second linear motor module 220 to move forward along the Y axis, so as to drive the three clamping jaw assemblies 210 to move above the buffer storage bin 500 synchronously, and then control the three clamping jaw assemblies 210 to extend out and grab the metal pipe 2 synchronously, wherein the clamping jaw assemblies 210 at two ends clamp two ends of the metal pipe 2, the clamping jaw assembly 210 in the middle clamps the middle of the metal pipe 2, as shown in fig. 2 and 9-10, and then control the three clamping jaw assemblies 210 to retract synchronously; then, the third linear motor module 230 drives the second linear motor module 220 to move in the negative direction of the Y axis, so that the three clamping jaw assemblies 210 move to the upper side of the moving platform 310 synchronously, and then the three clamping jaw assemblies 210 are controlled to extend downwards synchronously to wait for the clamping and tensioning mechanism 300 to clamp the metal pipe 2.

Second, the clamping and tensioning mechanism 300 is threaded. Referring to fig. 8-11 in particular, since the first electric gripper 333, the second electric gripper 343, and the third electric gripper 352 have been moved to the clamping position in the negative direction along the Y axis in synchronization, that is, the center line of the three has been moved to the position of the line L2 in fig. 8, at this time, the first electric gripper 333, the second electric gripper 343, and the third electric gripper 352 are controlled to simultaneously open and clamp the metal pipe 2, as shown in fig. 10-11, wherein the first electric gripper 333 and the second electric gripper 343 are clamped at the two ends of the metal pipe 2, so as to straighten the two ends of the metal pipe 2, and the third electric gripper 352 is clamped at the middle of the metal pipe 2, so as to prevent the metal pipe 2 from bending. In this process, the automatic loading and unloading mechanism 200 still clamps the metal pipe 2. It should be noted that the first electric gripper 333, the second electric gripper 343, and the third electric gripper 352 are not completely clamped, but a certain space is reserved for the metal pipe 2 to move freely.

Then, the first linear motor module 320 drives the first linear motor 321 to move forward along the X axis, so as to drive the entire fine adjustment assembly 330 to move forward along the X axis for a certain distance, where the specific moving distance is determined according to the actual clamping length, when the fine adjustment assembly 330 is moved to the right position, the first clamping jaw 3321 of the first direct rotation table 332 can be inserted into one end of the metal pipe 2, as shown in fig. 10-11, then the first clamping jaw 3321 of the first direct rotation table 332 is controlled to close to clamp one end of the metal pipe 2, and the first clamping jaw 3321 clamps the metal pipe 2 at a constant pressure. Correspondingly, the first linear motor module 320 drives the second linear motor 322 to move a certain distance along the negative direction of the X axis, so as to drive the whole reference assembly 340 to move, the specific moving distance is also determined according to the actual clamping length, after the reference assembly 340 moves to the right position, the second clamping jaw 3421 of the second direct-drive turntable 342 penetrates into the other end of the metal pipe 2, as shown in fig. 10-11, and then the second clamping jaw 3421 of the second direct-drive turntable 342 is controlled to close to clamp the other end of the metal pipe 2, and the second clamping jaw 3421 also clamps the metal pipe 2 at a constant pressure.

At this time, the step of penetrating the metal pipe 2 is completed, and at this time, the three clamping jaw assemblies 210 of the automatic loading and unloading mechanism 200 are controlled to be opened at the same time, and the three clamping jaw assemblies 210 are controlled to ascend to a safe position; the first and second

motorized grippers

333, 343 are then controlled to release the metal tube 2 and move in the Y-axis forward direction back to the safe position, but the third motorized gripper 352 is still hot gripping the metal tube 2.

Third, the clamping and tensioning mechanism 300 tensions the metal pipe 2. Specifically, the first linear motor 321 controlling the first linear motor module 320 is switched from the position mode to the torque mode, and the first linear motor 321 drives the fine tuning assembly 330 to slowly move along the X axis in the positive direction or the negative direction with a constant torque (the set value is determined according to calculation or actual test), as shown in fig. 8 and 11, so as to gradually tension the metal tube 2, and when the torque of the first linear motor 321 is balanced with the tension of the metal tube 2, the first linear motor 321 stops moving. In particular, the second linear motor 342 of the reference assembly 340 remains in the position mode during this process.

And fourthly, performing circular cutting processing on the metal pipe 2. Referring to fig. 1 and 3 specifically, the moving platform 310 moves to a position below the laser cutting mechanism 400 along the negative Y-axis direction, as shown in fig. 1, and at the same time, the first direct-drive turntable 332 and the second direct-drive turntable 342 rotate synchronously while ensuring the tension state of the metal tube 2, and the rotation speeds of the two are determined by the processing technology, so that the metal tube 2 is located at the focal position of the laser to perform the depth-setting cutting processing. After a position is processed, the first linear motor module 320 may be controlled to drive the third linear motor 323 to move along the X-axis, so as to drive the third electric gripper 352 to move to a next position to be processed. The moving platform 310 is then moved along the X-axis to move the next machining position of the metal tube 2 to the laser focus position for machining.

And fifthly, blanking the metal pipe 2. Specifically, after the processing of the metal tube 2 is completed, the moving platform 310 moves to the lower side of the automatic feeding and discharging mechanism 200 along the Y-axis forward direction, as shown in fig. 1, the automatic feeding and discharging mechanism 200 drives the three clamping jaw assemblies 21 thereof to extend downwards to clamp the processed metal tube 2, and then drives the second linear motor module 220 to move along the Y-axis forward direction through the third linear motor module 230, so as to drive the three clamping jaw assemblies 210 to move synchronously to the upper side of the buffer storage bin 500, so as to place the processed metal tube 2 into the buffer storage bin 500.

Then, the automatic loading and unloading mechanism 200 again clamps the next metal pipe 2 to be processed in the buffer bin 500, and then repeats the first step and the fifth step until the processing is completed.

Referring again to fig. 1-11, the present invention also discloses a metal pipe ring cutting and tensioning method, which uses the metal pipe tensioning and ring cutting device 1 as described above, and the structural parts of the metal pipe tensioning and ring cutting device 1 will not be described repeatedly, and only the metal pipe ring cutting and tensioning method will be described in detail below.

Specifically, the method comprises the following steps:

s01, controlling the clamping jaw assemblies 210 of the automatic loading and unloading mechanism 200 to move synchronously to clamp the metal tube 2 and transfer the metal tube 2 to the upper side of the moving platform 310;

specifically referring to fig. 1-2 and 9-10, the third linear motor module 230 of the automatic loading and unloading mechanism 200 drives the second linear motor module 220 to move forward along the Y axis, so as to drive the three clamping jaw assemblies 210 to move synchronously to the upper side of the buffer storage bin 500, and then controls the three clamping jaw assemblies 210 to extend out synchronously and grab the metal pipe 2, wherein the clamping jaw assemblies 210 at two ends clamp two ends of the metal pipe 2, the clamping jaw assembly 210 in the middle clamps the middle of the metal pipe 2, and then controls the three clamping jaw assemblies 210 to retract synchronously; then, the third linear motor module 230 drives the second linear motor module 220 to move along the Y-axis in the negative direction, so that the three clamping jaw assemblies 210 synchronously move to the upper side of the moving platform 310, and then the three clamping jaw assemblies 210 are controlled to synchronously extend downwards, so as to convey the metal pipe 2 to the positions corresponding to the first direct-drive rotating table 332 and the second direct-drive rotating table 342 of the clamping and tensioning mechanism 300.

S02, controlling the first electric claw 333, the second electric claw 343 and the third electric claw 352 of the clamping and tensioning mechanism 300 to synchronously extend and clamp the metal pipe 2;

referring to fig. 3-4 and 9-11 in particular, since the first electric gripper 333, the second electric gripper 343 and the third electric gripper 352 have been moved to the working position along the negative Y-axis direction in synchronization, that is, the center line of the three has been moved to the position of the line L2 in fig. 8, at this time, the first electric gripper 333, the second electric gripper 343 and the third electric gripper 352 are controlled to simultaneously open and grip the metal pipe 2, as shown in fig. 10-11, wherein the first electric gripper 333 and the second electric gripper 343 are held at the two ends of the metal pipe 2, so as to straighten the two ends of the metal pipe 2, and the third electric gripper 352 is held at the middle part of the metal pipe 2, so as to prevent the metal pipe 2 from bending. In addition, the first electric gripper 333, the second electric gripper 343, and the third electric gripper 352 are not completely clamped, but a certain space is reserved to allow the metal pipe 2 to move freely. In this process, the three jaw assemblies 210 of the automatic loading and unloading mechanism 200 still grip the metal pipe 2.

S03, driving the fine tuning assembly 330 to move a certain distance towards the metal tube 2 so that the first direct-rotation table 332 penetrates into one end of the metal tube 2, and then controlling the first direct-rotation table 332 to close to clamp one end of the metal tube 2 at a constant pressure;

referring to fig. 3-5 and 8-11, the first linear motor module 320 drives the first linear motor 321 to move forward along the X axis, so as to drive the entire fine tuning assembly 330 to move forward along the X axis for a certain distance, where the specific moving distance is determined according to the actual clamping length, when the fine tuning assembly 330 is moved to the right position, the first clamping jaw 3321 of the first direct drive table 332 can be inserted into one end of the metal pipe 2, as shown in fig. 10-11, and then the first clamping jaw 3321 of the first direct drive table 332 is controlled to close to clamp one end of the metal pipe 2, and the first clamping jaw 3321 clamps the metal pipe 2 at a constant pressure.

S04, driving the reference assembly 340 to move a certain distance towards the direction of the metal pipe 2 so that the second direct-drive rotary table 342 penetrates into the other end of the metal pipe 2, and then controlling the second direct-drive rotary table 342 to be closed to clamp the other end of the metal pipe 2 at a constant pressure;

referring to fig. 3-4, 6, and 8-11, the first linear motor module 320 drives the second linear motor 322 to move a certain distance in the negative direction of the X axis, so as to drive the entire reference assembly 340 to move, the specific moving distance is also determined according to the actual clamping length, when the reference assembly 340 moves to the right position, the second clamping jaw 3421 of the second direct-drive turntable 342 penetrates into the other end of the metal pipe 2, as shown in fig. 10-11, and then the second clamping jaw 3421 of the second direct-drive turntable 342 is controlled to close to clamp the other end of the metal pipe 2, and the second clamping jaw 3421 also clamps the metal pipe 2 at a constant pressure.

S05, controlling the clamping jaw assembly 210 of the automatic loading and unloading mechanism 200 to loosen the metal pipe 2 and return to a safe position;

referring specifically to fig. 1-2 and 9-10, the three jaw assemblies 210 are controlled to open simultaneously and then the three jaw assemblies 210 are controlled to rise to the safety position.

S06, controlling the first electric gripper 333 and the second electric gripper 343 to loosen the metal pipe 2 and retract to a safe position;

referring specifically to fig. 1, 3-4, and 8-11, the first and second

electric grippers

333, 343 are controlled to release the metal tube 2 and move forward along the Y-axis to retract to the safety position, i.e., the three are retracted to the position shown by the line L1 in fig. 8, but the third electric gripper 352 is still holding the metal tube 2.

S07, controlling the fine tuning assembly 330 to switch from the position mode to the torque mode, and then driving the fine tuning assembly 330 to slowly move along the axial direction of the metal tube 2 with a constant torque, so that the metal tube 2 is gradually tensioned, and controlling the fine tuning assembly 330 to stop moving when the tension force is balanced with the tension force of the metal tube 2;

referring to fig. 3-5 and 8-11, the first linear motor 321 of the first linear motor module 320 is controlled to switch from the position mode to the torque mode, so that the first linear motor 321 drives the fine tuning assembly 330 to move along the X axis slowly in the positive direction or the negative direction with a constant torque (the set value is determined according to calculation or actual test), as shown in fig. 8 and 11, the metal tube 2 is gradually tensioned, and when the tension of the first linear motor 321 is balanced with the tension of the metal tube 2, the first linear motor 321 stops moving. In particular, the second linear motor 342 of the reference assembly 340 remains in the position mode during this process.

S08, controlling the first direct-drive rotary table 332 and the second direct-drive rotary table 342 to synchronously rotate;

referring to fig. 1, 3-4 and 8-11, the first direct-drive turntable 332 and the second direct-drive turntable 342 rotate synchronously under the condition that the metal pipe 2 is kept tensioned, and the rotation speed of the two is determined by the processing technology, so that the metal pipe 2 can be positioned at the laser focus position for depth-fixed cutting processing.

S09, driving the moving platform 310 to move and transfer the metal tube 2 to the lower part of the laser cutting mechanism 400, and making the metal tube 2 located at the laser focus position for circular cutting.

Specifically referring to fig. 1, the moving platform 310 moves to a position below the laser cutting mechanism 400 along the negative Y-axis direction, so that the metal tube 2 is positioned at the laser focus position for performing the depth-fixing cutting process; after a position is machined, the first linear motor module 320 may be controlled to drive the third linear motor 323 to move along the X axis to drive the third electric gripper 352 to move to a next position to be machined, and then the moving platform 310 may be driven to move along the X axis to move a next machining position of the metal tube 2 to a laser focus position for machining.

Referring again to fig. 1, in the metal pipe circular cutting and tensioning method of the present invention, the step S09 is followed by the following steps:

and S10, moving the processed metal pipe 2 to the buffer bin 500.

Specifically, the driving moving platform 310 moves to the lower side of the automatic feeding and discharging mechanism 200 along the Y axis, then the three clamping jaw assemblies 21 controlling the automatic feeding and discharging mechanism 200 extend downwards to clamp the processed metal tube 2, and then the third linear motor module 230 is controlled to drive the second linear motor module 220 to move along the Y axis, so as to drive the three clamping jaw assemblies 210 to move synchronously to the upper side of the buffer storage bin 500, and then the three clamping jaw assemblies 210 are controlled to extend downwards to place the processed metal tube 2 into the buffer storage bin 500.

The above steps S01 to S10 are repeated until all the metal pipes 2 in the buffer bin 500 are processed. Then, the next buffer bin 500 is replaced to ensure continuous processing, thereby improving the processing efficiency.

In summary, according to the metal pipe tensioning and ring cutting device 1 of the present invention, the clamping and tensioning mechanism 300 comprises the fine tuning assembly 330, the reference assembly 340, and the intermediate connecting assembly 350, which are sequentially disposed, wherein the fine tuning assembly 330 comprises the first direct-driven turntable 332 and the first electric gripper 333, the reference assembly 340 comprises the second direct-driven turntable 342 and the second electric gripper 343, and the intermediate connecting assembly 350 comprises the third electric gripper 352; while the trim component 330 or the reference component 340 is provided with a position mode and a moment mode. Therefore, the straightening of the two ends of the metal pipe 2 can be realized by receiving and clamping the metal pipe 2 by the first electric gripper 333, the second electric gripper 343 and the third electric gripper 352; the first direct-drive rotary table 332 and the second direct-drive rotary table 342 are accurately aligned to two ends of the metal pipe 2 through the movement of the fine adjustment assembly 330 and the reference assembly 340, so that rapid material penetration is realized, and the processing effect is improved; secondly, the two ends of the metal pipe 2 are respectively clamped by the first direct-drive rotary table 332 and the second direct-drive rotary table 342, and one of the first direct-drive rotary table and the second direct-drive rotary table outputs constant tension through switching from a position mode to a moment mode by the fine adjustment assembly 330 or the reference assembly 340 so as to axially pull the metal pipe 2 under the condition of keeping the product not deformed, so that the metal pipe 2 is gradually tensioned, and the metal pipe 2 is prevented from being deformed due to overlarge or undersize tension; moreover, the first direct-drive rotary table 332 and the second direct-drive rotary table 342 synchronously rotate at a constant rotating speed in the state that the metal pipe 2 is tensioned, and meanwhile, the third electric claw 352 clamps and supports the middle part of the metal pipe 2, so that the metal pipe 2 is not easy to generate radial run-out, the problem that a processing point caused by the soft deformation of the metal pipe 2 is not in a laser focus is effectively solved, and the circular cutting processing process of the metal pipe 2 is more stable and reliable. In conclusion, the metal pipe tensioning and ring cutting device 1 has the characteristics of accurate position and fine regulation and control, and provides a more precise, more stable and more reliable processing mode for the laser depth setting processing of the ultra-thin metal pipe 2 and similar products.

Correspondingly, the metal tube ring cutting and tensioning method using the metal tube tensioning and ring cutting device 1 of the present invention has the same technical effects.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. The utility model provides a tubular metal resonator tensioning and ring cutting device which characterized in that, includes unloading mechanism, centre gripping and straining device, laser cutting mechanism in automation, wherein, centre gripping and straining device include:

the device comprises a first linear motor module, a fine adjustment assembly, a middle connection assembly and a reference assembly, wherein the fine adjustment assembly, the middle connection assembly and the reference assembly are sequentially connected onto the first linear motor module in a sliding mode, and one of the fine adjustment assembly and the reference assembly is provided with a position mode and a moment mode;

the fine adjustment assembly comprises a first direct-drive rotary table and a first electric paw arranged on the side part of the first direct-drive rotary table;

the reference assembly comprises a second direct-drive rotary table and a second electric paw, the second direct-drive rotary table is arranged opposite to the first direct-drive rotary table, and the second electric paw is arranged in parallel with the first electric paw;

the middle connection component comprises a third electric paw which is arranged in parallel with the first electric paw and the second electric paw;

the first electric gripper, the second electric gripper and the third electric gripper are used for receiving the metal pipe conveyed by the automatic feeding and discharging mechanism, when the first direct-drive rotary table and the second direct-drive rotary table clamp the metal pipe, the fine-tuning assembly or the reference assembly is switched to a torque mode and moves to tension the metal pipe, the metal pipe is circularly cut through synchronous rotation of the first direct-drive rotary table and the second direct-drive rotary table, and the third electric gripper always clamps and supports the metal pipe in the circular cutting process.

2. The metal tube tensioning and ring cutting apparatus of claim 1, wherein said first linear motor module extends in an X-axis direction; the first direct-drive rotary table and the second direct-drive rotary table are oppositely arranged along the X-axis direction, the first electric paw, the second electric paw and the third electric paw are arranged in parallel along the X-axis direction, and the first electric paw, the second electric paw and the third electric paw can move along the Y-axis direction.

3. A metal tube tensioning and ring cutting apparatus as claimed in claim 1, wherein the fine adjustment assembly further comprises a fine adjustment module connected to the first direct drive turntable and adapted to drive movement thereof in the X-axis or Y-axis direction, the fine adjustment module adapted to drive movement of the first direct drive turntable to adjust the position thereof.

4. The metal tube tensioning and ring cutting device of claim 1, wherein the intermediate engagement assembly is movable in an X-axis direction to allow the third motorized gripper to grip the metal tube at a location to be laser cut.

5. The metal pipe tensioning and girdling device of claim 1, further comprising a moving platform capable of moving along an X-axis direction and a Y-axis direction, wherein the first linear motor module is mounted on the moving platform, and the first electric gripper, the second electric gripper and the third electric gripper can receive the metal pipe conveyed by the automatic feeding and discharging mechanism through the movement of the moving platform, and can move the metal pipe clamped and tensioned by the first direct-drive turntable and the second direct-drive turntable to a position below the laser cutting mechanism for processing.

6. The metal tube tensioning and ring cutting device of claim 5, wherein the moving platform is further provided with a guide rail extending along the X-axis direction, and the fine adjustment assembly and the reference assembly are both slidably connected to the guide rail.

7. The metal tube tensioning and ring cutting device of claim 1, wherein the automated loading and unloading mechanism comprises:

the second linear motor module is arranged above the first linear motor module and extends along the X-axis direction;

the third linear motor module is connected to the second linear motor module and extends along the Y-axis direction;

the clamping jaw assemblies are arranged on the second linear motor module at intervals, and each clamping jaw assembly can stretch out and draw back along the vertical direction;

and the second linear motor module and the third linear motor module drive the clamping jaw assemblies to move so as to convey the metal pipe to be processed to the upper part of the clamping and tensioning mechanism or output the processed metal pipe.

8. The metal tube tensioning and ring cutting device of claim 7, wherein the jaw assembly includes a driving member, a vertical slide mounted to the second linear motor module and extending in a vertical direction, and a loading jaw slidably connected to the vertical slide, the driving member being connected to the loading jaw and adapted to drive the loading jaw up and down along the vertical slide.

9. The metal tube tensioning and circular cutting device according to claim 1, further comprising a buffer bin disposed at one side of the clamping and tensioning mechanism and below the automatic loading and unloading mechanism, wherein the buffer bin is used for storing the metal tubes to be processed and finished.

10. A method of tensioning and ring-cutting a metal tube using the metal tube tensioning and ring-cutting apparatus as claimed in any one of claims 1 to 9, comprising the steps of: