Metal part laser cutting robot

Abstract

The invention relates to the technical field of metal part cutting, in particular to a metal part laser cutting robot which comprises a main body ring and an auxiliary ring, a rotating mechanism is arranged on the inner side of the main body ring and the inner side of the auxiliary ring, and the rotating mechanism comprises two third empty grooves formed in the inner side of the main body ring and the inner side of the auxiliary ring correspondingly. And annular limiting grooves are formed in the main body ring and the auxiliary ring in the third empty grooves in a communicating mode correspondingly, rotating rings are rotationally connected into the two annular limiting grooves correspondingly, fixed rings are fixedly connected to the inner side faces of the two rotating rings correspondingly, and a cutting and impurity removing mechanism is arranged on the side faces, located on the inner side of the main body ring, of the fixed rings. The inert gas is sprayed to the laser cutting mechanism through the multiple first gas outlet holes, so that the cutting area of the laser cutting mechanism is filled with the inert gas, metal is prevented from reacting with oxygen and the like in air at the high temperature, the consumption of the inert gas is small, and the flatness of cutting seams after cutting is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal part cutting, and in particular to a metal part laser cutting robot. Background Art

[0002] Pipeline laser cutting is to irradiate a high-energy-density laser beam onto the surface of the pipeline, so that the pipeline material is quickly heated to the melting point or boiling point, and at the same time, the molten or vaporized material is blown away from the cutting area with the help of high-pressure gas, thereby forming an incision. When cutting metal pipes, due to the greater hardness of metal pipes, the cut is also larger after cutting. In some petrochemical factories, the distance between the processing workshop and the storage tank is often very far, and they are generally transported through metal pipes. When a metal pipe is broken due to collision or other circumstances, the broken section of the pipe needs to be replaced.

[0003] In the prior art, when it is necessary to cut and repair a damaged part of a pipeline, this section of the pipeline needs to be taken out from the pipeline system, and then placed in a laser cutting machine for rotational cutting, and then the repaired annular pipeline is welded to the incision. The cutting operation is cumbersome and the efficiency is very low. The inside of the transported metal pipeline is generally contaminated with impurities, which are prone to react when exposed to high temperatures. For some longer pipelines, it is difficult to clean the inner wall of the pipeline through the ports at both ends. When laser cutting some metal pipelines, it is necessary to prevent the cutting area from contacting with the air. The prior art generally introduces inert gas into the inside of the metal pipe to prevent the metal pipe from reacting with the air, and the consumption of inert gas is relatively large. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a metal laser cutting robot.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a metal laser cutting robot, comprising a main ring and a secondary ring, wherein a rotating mechanism is arranged on the inner sides of the main ring and the secondary ring, wherein the rotating mechanism comprises two third empty grooves respectively opened on the inner sides of the main ring and the secondary ring, wherein the main ring and the secondary ring are respectively provided with annular limiting grooves in the third empty grooves, wherein rotating rings are rotatably connected in the two annular limiting grooves, wherein the inner sides of the two rotating rings are respectively fixedly connected with fixed rings, wherein a cutting and impurity removing mechanism is arranged on the side of the fixed ring located on the inner side of the main ring, wherein the cutting and impurity removing mechanism comprises a third electric telescopic rod arranged on the side of the fixed ring, wherein the telescopic end of the third electric telescopic rod is fixedly connected with a support plate, wherein a laser cutting mechanism is arranged on the side of the support plate, and a limiting mechanism is arranged on the end faces of the main ring and the secondary ring.

[0006] Preferably, a fourth electric telescopic rod is penetrated through the end surface of the support plate, the telescopic end of the fourth electric telescopic rod is fixedly connected to a hollow tube, a sliding tube is slidably provided at one end of the hollow tube, the end of the sliding tube is fixedly connected to a fixing plate, a second through hole communicating with the sliding tube is provided at the end of the fixing plate, a cavity communicating with the second through hole is provided inside the fixing plate, a plurality of second air outlet holes communicating with the cavity are provided at the other end of the fixing plate, and a flexible scraper is fixedly connected to the end of the fixing plate.

[0007] Preferably, the hollow tube includes a first straight tube, the upper end of the first straight tube is fixedly connected to the telescopic end of the fourth electric telescopic rod, a plurality of first air outlet holes are opened on the side of the first straight tube, and the plurality of first air outlet holes face the laser cutting mechanism, a gas storage tank is fixedly connected to the side of the fixing ring, a first through hole is opened on the side of the first straight tube, the gas outlet end of the gas storage tank is fixedly connected to a control valve, the upper port of the control valve is fixedly connected to a delivery pipe, and the other end of the delivery pipe is communicated with the first through hole.

[0008] Preferably, the hollow tube includes a curved tube and a second straight tube, one end of the curved tube is fixedly connected to the first straight tube, the other end of the curved tube is fixedly connected to the second straight tube, the side surface of the sliding tube is fixedly connected to a fixed body at a position close to the end, the side surface of the fixed body is slidingly matched with the inner side surface of the second straight tube, a fifth empty groove is provided on the end surface of the fixed body, and two second placement grooves are symmetrically provided at the end of the fixed body, springs are respectively fixedly connected in the two second placement grooves, and the ends of the two springs are fixedly connected to sealing plates that slide with the fifth empty groove.

[0009] Preferably, a cut-off ring is fixedly connected to the side surface of the second straight tube at a position close to the end, the inner side surface of the cut-off ring is tightly fitted with the outer side surface of the sliding tube, the end of the cut-off ring is fixedly connected to two symmetrically arranged fixing rods, and the end of the fixed body is penetrated by two third through holes corresponding to the positions of the fixing rods.

[0010] Preferably, the inner side surface of the second straight tube is provided with a spiral protrusion, the side surface of the fixed body cooperates with the spiral protrusion to form a spiral rotation pair, and the angle of rotation between the side surface of the fixed body and the spiral protrusion is 90°.

[0011] Preferably, the end faces of the two fixing rings are respectively provided with a fourth empty groove, the two fixing rings are respectively fixedly connected with a gear ring in the fourth empty groove, the end of the main ring is fixedly connected with a motor, the transmission shaft end of the motor is fixedly connected with a gear meshing with the gear ring in the fourth empty groove, the side faces of the main ring and the auxiliary ring are respectively symmetrically provided with first placement grooves, the main ring is respectively fixedly connected with a second electric telescopic rod in the two first placement grooves, the telescopic ends of the two second electric telescopic rods are respectively fixedly connected with matching plates, the side faces of the main ring and the auxiliary ring are respectively fixedly connected with connecting plates, the two rotating grooves are respectively fixedly connected with conductive rings, the end faces of the main ring and the auxiliary ring are respectively provided with third placement grooves, and the two third placement grooves are respectively fixedly connected with conductive rods in contact with the conductive rings.

[0012] Preferably, the limiting mechanism includes four first empty grooves symmetrically opened on the sides of the main ring and the auxiliary ring, and the sides of the main ring and the auxiliary ring are respectively provided with second empty grooves communicating with the first empty grooves, and the four first empty grooves are respectively fixedly connected to the first electric telescopic rods, and the telescopic ends of the four first electric telescopic rods are respectively fixedly connected to the clamping plates.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Place the inner sides of the main ring and the auxiliary ring on the side of the metal pipe that needs to be cut. At this time, ensure that the contact side of the main ring and the fixed ring in the auxiliary ring is in a vertical state. Then extend the two second electric telescopic rods, and the two second electric telescopic rods drive the matching plate to engage into the first placement groove in the auxiliary ring, so that the main ring and the fixed ring in the auxiliary ring are connected to form an integral ring structure. Then extend the four first electric telescopic rods at the same time. The four first electric telescopic rods respectively drive the clamping plates to squeeze the outer wall of the metal pipe. There is no need to remove the entire section of the metal pipe, which improves the cutting efficiency and ensures that the device remains stable during the process of cutting the metal pipe.

[0015] 2. The inert gas in the gas tank enters the delivery pipe, then enters the hollow pipe, and is ejected from a plurality of first air outlets. The inert gas is ejected toward the laser cutting mechanism through the plurality of first air outlets, so that the area cut by the laser cutting mechanism is filled with inert gas to prevent the metal from reacting with oxygen in the air at high temperatures. The consumption of inert gas is small, and the flatness of the cutting seam after cutting is improved. At the same time, the sliding tube drives the flexible scraper on the side of the fixed plate to move to the area to be cut by the laser cutting mechanism, and the inner wall of the metal pipe to be cut is cleaned by the flexible scraper. At the same time, the ejected inert gas can also clean the area to be cut again to prevent dust from affecting the flatness of the cutting seam, and prevent impurities remaining on the inner wall of the metal pipe from reacting at high temperatures, thereby improving the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is an overall cross-sectional structural diagram of the present invention;

[0018] Figure 3 It is a partial cross-sectional structural diagram of the present invention;

[0019] Figure 4 The schematic diagram of the partial structure of the cutting and impurity removal mechanism of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 5 The schematic diagram of the partial structure of the cutting and impurity removal mechanism of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 6 For the present invention Figure 3 A magnified image of point A;

[0022] Figure 7 For the present invention Figure 3 The enlarged view of point B;

[0023] Figure 8 For the present invention Figure 5 Enlarged view of point C;

[0024] Fig. 9 For the present invention Figure 5 Enlarged view of point D.

[0025] 1. Main ring; 2. Limiting mechanism; 3. Rotating mechanism; 4. Cutting and impurity removal mechanism; 5. Laser cutting mechanism; 6. Gas tank; 11. Auxiliary ring; 12. Third placement slot; 13. Conductive rod; 14. Rotating slot; 15. Conductive ring; 21. Connecting plate; 22. First empty slot; 23. First electric telescopic rod; 24. Clamping plate; 25. Second empty slot; 31. Third empty slot; 32. Annular limiting slot; 33. Rotating ring; 34. Fixed ring; 35. Fourth empty slot; 36. Gear ring; 37. Gear; 38. First placement slot; 39. Second electric telescopic rod; 310. Matching plate; 311. Motor; 41. Support plate; 4 2. Hollow tube; 43. First air outlet; 44. First through hole; 46. Sliding tube; 47. Fixed plate; 48. Second air outlet; 49. Flexible scraper; 410. Second through hole; 411. Cavity; 412. Third electric telescopic rod; 413. Fourth electric telescopic rod; 414. Delivery pipe; 415. Control valve; 421. First straight tube; 422. Bend tube; 423. Second straight tube; 424. Stop ring; 425. Spiral protrusion; 427. Fixed rod; 428. Fixed body; 429. Third through hole; 4210. Fifth empty slot; 4211. Sealing plate; 4212. Second placement slot; 4213. Spring. DETAILED DESCRIPTION

[0026] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0027] See also Figure 1 - Fig. 9 A metal laser cutting robot comprises a main ring 1 and a secondary ring 11, wherein a rotating mechanism 3 is arranged inside the main ring 1 and the secondary ring 11.

[0028] In this embodiment, the rotating mechanism 3 includes two third hollow grooves 31 respectively opened on the inner sides of the main ring 1 and the auxiliary ring 11, and the main ring 1 and the auxiliary ring 11 are respectively provided with annular limiting grooves 32 in the third hollow grooves 31, and rotating rings 33 are respectively rotatably connected in the two annular limiting grooves 32, and the inner sides of the two rotating rings 33 are respectively fixedly connected with fixed rings 34.

[0029] The end faces of the two fixed rings 34 are respectively provided with fourth slots 35, and the two fixed rings 34 are respectively fixedly connected with gear rings 36 in the fourth slots 35. The end of the main ring 1 is fixedly connected with a motor 311, and the transmission shaft end of the motor 311 is fixedly connected with a gear 37 meshing with the gear ring 36 in the fourth slot 35. The sides of the main ring 1 and the auxiliary ring 11 are respectively symmetrically provided with first placement slots 38, and the main ring 1 is respectively fixedly connected with second electric telescopic rods 39 in the two first placement slots 38, and the telescopic ends of the two second electric telescopic rods 39 are respectively fixedly connected with matching plates 310. The sides of the main ring 1 and the auxiliary ring 11 are respectively fixedly connected with connecting plates 21, and the two rotating grooves 14 are respectively fixedly connected with conductive rings 15. The end faces of the main ring 1 and the auxiliary ring 11 are respectively provided with third placement slots 12, and the two third placement slots 12 are respectively fixedly connected with conductive rods 13 in contact with the conductive rings 15.

[0030] Specifically, the motor 311 drives the gear 37 to rotate, and the gear 37 cooperates to drive the gear ring 36 to rotate, thereby driving the two fixing rings 34 to rotate along the outer wall of the metal tube.

[0031] In this embodiment, a cutting and impurity removing mechanism 4 is provided on the side of the fixed ring 34 located on the inner side of the main ring 1, and the cutting and impurity removing mechanism 4 includes a third electric telescopic rod 412 arranged on the side of the fixed ring 34, and the telescopic end of the third electric telescopic rod 412 is fixedly connected to a support plate 41, and a laser cutting mechanism 5 is provided on the side of the support plate 41.

[0032] A fourth electric telescopic rod 413 is provided through the end surface of the support plate 41, and the telescopic end of the fourth electric telescopic rod 413 is fixedly connected to a hollow tube 42, a sliding tube 46 is slidably provided at one end of the hollow tube 42, and a fixing plate 47 is fixedly connected to the end of the sliding tube 46, and a second through hole 410 communicating with the sliding tube 46 is provided at the end of the fixing plate 47, and a cavity 411 communicating with the second through hole 410 is provided inside the fixing plate 47, and a plurality of second air outlet holes 48 communicating with the cavity 411 are provided at the other end of the fixing plate 47, and a flexible scraper 49 is fixedly connected to the end of the fixing plate 47.

[0033] The hollow tube 42 includes a first straight tube 421, the upper end of the first straight tube 421 is fixedly connected to the telescopic end of the fourth electric telescopic rod 413, a plurality of first air outlet holes 43 are opened on the side of the first straight tube 421, and a plurality of the first air outlet holes 43 face the laser cutting mechanism 5, a gas storage tank 6 is fixedly connected to the side of the fixing ring 34, a first through hole 44 is opened on the side of the first straight tube 421, the gas outlet end of the gas storage tank 6 is fixedly connected to the control valve 415, the upper port of the control valve 415 is fixedly connected to the delivery pipe 414, and the other end of the delivery pipe 414 is connected to the first through hole 44.

[0034] The hollow tube 42 includes a curved tube 422 and a second straight tube 423, one end of the curved tube 422 is fixedly connected to the first straight tube 421, and the other end of the curved tube 422 is fixedly connected to the second straight tube 423, and the side of the sliding tube 46 is fixedly connected with a fixed body 428 at a position close to the end, and the side of the fixed body 428 is slidingly matched with the inner side of the second straight tube 423, and the end face of the fixed body 428 is provided with a fifth empty groove 4210, and the end of the fixed body 428 is symmetrically provided with two second placement grooves 4212, and the two second placement grooves 4212 are respectively fixedly connected with springs 4213, and the ends of the two springs 4213 are fixedly connected with sealing plates 4211 that slide with the fifth empty groove 4210.

[0035] A cut-off ring 424 is fixedly connected to the side surface of the second straight tube 423 near the end, and the inner side surface of the cut-off ring 424 is tightly fitted with the outer side surface of the sliding tube 46. The end of the cut-off ring 424 is fixedly connected to two symmetrically arranged fixing rods 427, and the end of the fixing body 428 is penetrated by two third through holes 429 corresponding to the positions of the fixing rods 427.

[0036] The inner side surface of the second straight tube 423 is provided with a spiral protrusion 425 , and the side surface of the fixing body 428 cooperates with the spiral protrusion 425 to form a spiral rotation pair, and the angle of the cooperation between the side surface of the fixing body 428 and the spiral protrusion 425 is 90°.

[0037] Specifically, the gas in the gas storage tank 6 moves to the second straight pipe 423 through the delivery pipe 414, and the gas pushes the sliding tube 46 to move to the side of the cut-off ring 424 through the seal of the sealing plate 4211 and the fixed body 428. During the movement, the sliding tube 46 rotates 90° through the cooperation between the spiral protrusion 425 and the fixed body 428. At the same time, the sliding tube 46 drives the flexible scraper 49 on the side of the fixed plate 47 to move to the area that the laser cutting mechanism 5 is about to cut, and the inner wall of the metal tube to be cut is cleaned by the flexible scraper 49 to prevent impurities remaining on the inner wall of the metal tube from reacting at high temperature.

[0038] In this embodiment, the end surfaces of the main ring 1 and the auxiliary ring 11 are provided with limiting mechanisms 2 .

[0039] The limiting mechanism 2 includes four first slots 22 symmetrically opened on the sides of the main ring 1 and the auxiliary ring 11, and the sides of the main ring 1 and the auxiliary ring 11 are respectively opened with second slots 25 communicating with the first slots 22, and the four first slots 22 are respectively fixedly connected with first electric telescopic rods 23, and the telescopic ends of the four first electric telescopic rods 23 are respectively fixedly connected with clamping plates 24.

[0040] Specifically, the main ring 1 and the fixed ring 34 in the secondary ring 11 are connected to form an integral ring structure, and then the four first electric telescopic rods 23 are extended at the same time. The four first electric telescopic rods 23 respectively drive the clamping plates 24 to squeeze the outer wall of the metal pipe to ensure that the device remains stable during the process of cutting the metal pipe.

[0041] When in use, clean the outer wall of the metal tube, then place the inner sides of the main ring 1 and the auxiliary ring 11 on the side of the metal tube that needs to be cut. At this time, ensure that the contact side of the main ring 1 and the fixed ring 34 in the auxiliary ring 11 is in a vertical state, then extend the two second electric telescopic rods 39, and the two second electric telescopic rods 39 drive the matching plate 310 to engage into the first placement groove 38 in the auxiliary ring 11, so that the main ring 1 and the fixed ring 34 in the auxiliary ring 11 are connected into an integral annular structure, and then extend the four first electric telescopic rods 23 at the same time, and the four first electric telescopic rods 23 respectively drive the clamping plates 24 to squeeze the outer wall of the metal tube to ensure that the device remains stable during the process of cutting the metal tube.

[0042] Then start the motor 311, which drives the gear 37 to rotate. The gear 37 cooperates to drive the gear ring 36 to rotate, thereby driving the two fixed rings 34 to rotate along the outer wall of the metal tube. While rotating, the staff controls the control valve 415 to open, so that the inert gas in the gas tank 6 enters the delivery pipe 414, and then enters the hollow tube 42, and is ejected from the first air outlet holes 43. The inert gas is sprayed toward the laser cutting mechanism 5 through the first air outlet holes 43, so that the area cut by the laser cutting mechanism 5 is filled with inert gas, which prevents the metal from reacting with oxygen in the air at high temperature, thereby improving the flatness of the cutting seam after cutting.

[0043] After the motor 311 drives the laser cutting mechanism 5 to rotate for a distance, the motor 311 drives the hollow tube 42 to move above the cutting seam. At this time, the plane where the fixed plate 47 and the hollow tube 42 are located coincides with the cutting seam. Then the fourth electric telescopic rod 413 extends, driving the hollow tube 42 and the fixed plate 47 to move through the cutting seam to the inner wall of the metal tube. At this time, the gas in the gas storage tank 6 moves to the second straight tube 423 through the delivery pipe 414. The gas pushes the sliding tube 46 to move to the side of the cut-off ring 424 through the seal between the sealing plate 4211 and the fixed body 428. During the movement, the sliding tube 46 rotates 90° through the cooperation between the spiral protrusion 425 and the fixed body 428. At the same time, the sliding tube 46 drives the flexible scraper 49 on the side of the fixed plate 47 to move to the area to be cut by the laser cutting mechanism 5. The inner wall of the metal tube to be cut is cleaned by the flexible scraper 49 to prevent the impurities remaining on the inner wall of the metal tube from reacting at high temperature, thereby improving the safety of the device.

[0044] When the fixed body 428 moves to the stop ring 424 under the push of the gas, the fixed rod 427 at the end of the stop ring 424 passes through the third through hole 429, driving the sealing plate 4211 to move out of the fifth slot 4210. At this time, a part of the gas enters the second through hole 410 through the inner side of the sliding tube 46, and is finally discharged from the plurality of second air outlets 48 through the cavity 411, ensuring that the inner wall of the metal tube cutting area is always filled with inert gas during laser cutting, thereby improving the stability of the device.

[0045] During the laser cutting process, an annular positive conductor and a negative conductor are arranged on the inner side of the conductive ring 15, and the two fixed rings 34 are respectively provided with positive contact sheets and negative contact sheets on the sides communicating with the rotating groove 14, the positive contact sheets are in contact with the positive conductor, and the negative contact sheets are in contact with the negative conductor, the positive contact sheets and the negative contact sheets are respectively electrically connected to the positive and negative poles of the second electric telescopic rod 39, the third electric telescopic rod 412, the fourth electric telescopic rod 413 and the control valve 415 on the inner side of the fixed ring 34 through electric wires, and the positive conductor and the negative conductor are electrically connected to the positive and negative poles of the external power supply through electric wires, thereby ensuring that when the fixed ring 34 rotates, various electronic components on the fixed ring 34 can be stably connected to the external power supply.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A metal laser cutting robot, comprising a main ring (1) and a secondary ring (11), characterized in that: A rotating mechanism (3) is arranged on the inner side of the main ring (1) and the auxiliary ring (11), and the rotating mechanism (3) comprises two third hollow grooves (31) respectively arranged on the inner side of the main ring (1) and the auxiliary ring (11), and an annular limiting groove (32) is arranged in the third hollow grooves (31) so as to communicate with each other, and a rotating ring (33) is rotatably connected in the two annular limiting grooves (32), and the inner side surfaces of the two rotating rings (33) are respectively fixedly connected with a fixed member. A fixed ring (34), a cutting and impurity removal mechanism (4) is arranged on the side of the fixed ring (34) located inside the main ring (1), the cutting and impurity removal mechanism (4) comprises a third electric telescopic rod (412) arranged on the side of the fixed ring (34), the telescopic end of the third electric telescopic rod (412) is fixedly connected to a support plate (41), the side of the support plate (41) is provided with a laser cutting mechanism (5), and the end surfaces of the main ring (1) and the auxiliary ring (11) are provided with a limiting mechanism (2).

2. A metal laser cutting robot according to claim 1, characterized in that: A fourth electric telescopic rod (413) is provided through the end surface of the support plate (41); the telescopic end of the fourth electric telescopic rod (413) is fixedly connected to a hollow tube (42); a sliding tube (46) is slidably provided at one end of the hollow tube (42); the end of the sliding tube (46) is fixedly connected to a fixing plate (47); a second through hole (410) communicating with the sliding tube (46) is provided at the end of the fixing plate (47); a cavity (411) communicating with the second through hole (410) is provided inside the fixing plate (47); a plurality of second air outlet holes (48) communicating with the cavity (411) are provided at the other end of the fixing plate (47); and a flexible scraper (49) is fixedly connected to the end of the fixing plate (47).

3. A metal laser cutting robot according to claim 2, characterized in that: The hollow tube (42) comprises a first straight tube (421), the upper end of the first straight tube (421) is fixedly connected to the telescopic end of the fourth electric telescopic rod (413), a plurality of first air outlet holes (43) are provided on the side of the first straight tube (421), and the plurality of first air outlet holes (43) face the laser cutting mechanism (5), a gas storage tank (6) is fixedly connected to the side of the fixing ring (34), a first through hole (44) is provided on the side of the first straight tube (421), a control valve (415) is fixedly connected to the gas outlet end of the gas storage tank (6), an upper end of the control valve (415) is fixedly connected to a delivery pipe (414), and the other end of the delivery pipe (414) is in communication with the first through hole (44).

4. The metal laser cutting robot according to claim 2, characterized in that: The hollow tube (42) comprises a curved tube (422) and a second straight tube (423), one end of the curved tube (422) is fixedly connected to the first straight tube (421), and the other end of the curved tube (422) is fixedly connected to the second straight tube (423), a fixed body (428) is fixedly connected to the side surface of the sliding tube (46) at a position close to the end, the side surface of the fixed body (428) is slidably matched with the inner side surface of the second straight tube (423), a fifth empty groove (4210) is provided on the end surface of the fixed body (428), and two second placement grooves (4212) are symmetrically provided at the end of the fixed body (428), and springs (4213) are respectively fixedly connected in the two second placement grooves (4212), and the ends of the two springs (4213) are fixedly connected with sealing plates (4211) slidably matched with the fifth empty groove (4210).

5. The metal laser cutting robot according to claim 4, characterized in that: A stop ring (424) is fixedly connected to the side surface of the second straight tube (423) at a position close to the end, and the inner side surface of the stop ring (424) is tightly fitted with the outer side surface of the sliding tube (46). The end of the stop ring (424) is fixedly connected to two symmetrically arranged fixing rods (427), and the end of the fixing body (428) is penetrated by two third through holes (429) corresponding to the positions of the fixing rods (427).

6. The metal laser cutting robot according to claim 4, characterized in that: The inner side surface of the second straight tube (423) is provided with a spiral protrusion (425), the side surface of the fixed body (428) and the spiral protrusion (425) form a spiral rotation pair, and the angle of the coordinated rotation between the side surface of the fixed body (428) and the spiral protrusion (425) is 90°.

7. The metal laser cutting robot according to claim 1, characterized in that: The end surfaces of the two fixing rings (34) are respectively provided with fourth slots (35), and the two fixing rings (34) are respectively fixedly connected with a gear ring (36) in the fourth slots (35). The end of the main body ring (1) is fixedly connected with a motor (311), and the transmission shaft end of the motor (311) is fixedly connected with a gear (37) meshing with the gear ring (36) in the fourth slot (35). The end surfaces of the two fixing rings (34) are respectively symmetrically provided with four first placement slots (38), and the two first placement slots (38) located on the end surface of one fixing ring (34) are respectively fixedly connected with a second An electric telescopic rod (39), the telescopic ends of the two second electric telescopic rods (39) are respectively fixedly connected with matching plates (310), the sides of the main ring (1) and the auxiliary ring (11) are respectively fixedly connected with connecting plates (21), the sides of the two fixed rings (34) are respectively provided with rotation grooves (14), the two rotation grooves (14) are respectively fixedly connected with conductive rings (15), the end faces of the main ring (1) and the auxiliary ring (11) are respectively provided with third placement grooves (12), and the two third placement grooves (12) are respectively fixedly connected with conductive rods (13) in contact with the conductive rings (15).

8. The metal laser cutting robot according to claim 1, characterized in that: The limiting mechanism (2) comprises four first empty slots (22) symmetrically arranged on the side surfaces of the main ring (1) and the auxiliary ring (11); the side surfaces of the main ring (1) and the auxiliary ring (11) are respectively provided with second empty slots (25) communicating with the first empty slots (22); the four first empty slots (22) are respectively fixedly connected with first electric telescopic rods (23); and the telescopic ends of the four first electric telescopic rods (23) are respectively fixedly connected with clamping plates (24).

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