A device for chamfering the end of a seamless steel tube

Abstract

The present application relates to the technical field of seamless steel pipe production equipment, and particularly relates to a pipe orifice corner grinding device for seamless steel pipes, which comprises a support frame, an installation plate is arranged on the support frame, a driving mechanism is arranged on the support frame and comprises a reciprocating component and a deflection component, the reciprocating component comprises a reciprocating piece which is slidingly arranged on the support frame, when the reciprocating piece moves along the length direction of the support frame, the deflection component can drive the installation plate to deflect relative to the support frame, a switching component is arranged on the installation plate, during the deflection of the installation plate relative to the support frame, the switching component cooperates with a positioning piece which is fixedly arranged on the installation plate, so that the position of the installation plate can be switched and fixed, and through the cooperation between the driving mechanism and the switching component, the burrs on the inner and outer walls of the pipe orifice of the seamless steel pipe body can be ground, so as to facilitate subsequent welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seamless steel pipe production equipment, in particular to a pipe orifice corner grinding device for seamless steel pipes. BACKGROUND

[0002] Seamless steel pipes are steel pipes made of whole metal without joints on the surface. According to the production method, the seamless pipes are divided into hot-rolled pipes, cold-rolled pipes, cold-drawn pipes, extruded pipes and top pipes. According to the cross-sectional shape, the seamless steel pipes are divided into circular and special-shaped pipes. The special-shaped pipes include square, oval, triangular, hexagonal, melon seed-shaped, star-shaped and finned pipe. According to the use, there are thick-walled pipes and thin-walled pipes. The seamless steel pipes are mainly used as oil drilling pipes, cracking pipes for petroleum and chemical industry, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors and aviation.

[0003] When the seamless steel pipe is used, the pipe orifice needs to be ground to remove the burrs at the pipe orifice of the seamless steel pipe, so as to improve the sealing performance of the pipe and ensure that the pipe will not leak or burst.

[0004] However, the current grinding of the pipe orifice is usually carried out by using an electric grinder or a pneumatic grinding head. During grinding, the operator needs to hold the electric grinder or the pneumatic grinding head to grind the pipe orifice. Since the grinding is manually operated, it is difficult to ensure the consistency of the inclination of the pipe orifice. When the seamless steel pipe is used, the welding time will be increased and the welding quality will be affected. SUMMARY

[0005] The present application aims to provide a pipe orifice corner grinding device for seamless steel pipes to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] A pipe orifice corner grinding device for seamless steel pipes, a support frame, an installation plate is arranged on the support frame;

[0008] A driving mechanism is arranged on the support frame and includes a reciprocating component and a deflection component. The reciprocating component includes a reciprocating member slidingly arranged on the support frame. When the reciprocating member moves along the length direction of the support frame, the deflection component can drive the installation plate to deflect relative to the support frame.

[0009] The switching assembly is arranged on the mounting plate, and the switching assembly is matched with the positioning member fixed on the mounting plate during the deflection of the mounting plate relative to the support frame, so that the position of the mounting plate can be switched and fixed.

[0010] As a further scheme of the present application, the reciprocating assembly further comprises two groups of pulleys rotatably arranged along the length direction of the support frame, and a belt is arranged on the two groups of pulleys, and a fixing column is arranged on the belt, and the fixing column is slidably connected with the reciprocating member.

[0011] As a further scheme of the present application, the reciprocating member comprises a reciprocating plate slidably arranged on the support frame, and a through groove is arranged on the reciprocating plate, and the fixing column is slidably arranged in the through groove.

[0012] As a further scheme of the present application, the deflection assembly comprises a drive gear rotatably arranged on the support frame, and the drive gear is engaged with a rack plate fixed on the reciprocating plate.

[0013] As a further scheme of the present application, the switching assembly comprises a fixing rod fixed on the mounting plate, the fixing rod is slidably connected with a fixing plate arranged on the support frame, a fixing shaft is arranged on the mounting plate, one end of the fixing shaft away from the mounting plate is rotatably arranged on the support frame, and the fixing shaft is connected with the drive gear through a transmission belt.

[0014] The switching assembly further comprises an elastic member slidably arranged on the mounting plate.

[0015] As a further scheme of the present application, the elastic member comprises a sliding rod fixed on the mounting plate, a spring is slidably arranged on the sliding rod, one end of the spring is abutted with the mounting plate, the other end of the spring is abutted with a sliding block slidably arranged on the sliding rod, and a pulley is rotatably arranged on the sliding block.

[0016] As a further scheme of the present application, the positioning member comprises a positioning plate fixed on the support frame, a symmetrical embedding groove is arranged on the positioning plate, and the embedding groove comprises symmetrical positioning grooves and guide surfaces.

[0017] As a further scheme of the present application, a fixing ring is further arranged on the support frame, a sleeving ring is rotatably arranged in the fixing ring, the sleeving ring is connected with a linkage wheel fixed on the support frame through a linkage belt, a rotating rod is coaxially fixed on the linkage wheel, the rotating rod is fixedly connected with an output shaft of a first motor fixed on the support frame, and the rotating rod is connected with one group of the pulleys through a bevel gear set.

[0018] Compared with the prior art, the present application has the following advantages:

[0019] With the cooperation between the driving mechanism and the switching assembly, by starting the first motor, the sleeve ring and the belt are driven to rotate synchronously, so that the seamless steel pipe body can rotate by itself when the grinding disc performs the deburring operation, thereby improving the deburring efficiency. After the sleeve ring drives the seamless steel pipe body to rotate for one round, the belt just drives the rack plate and the driving gear to mesh and rotate, drives the grinding disc and the mounting plate to deflect, and then under the cooperation of the elastic member and the fixing member, the grinding disc is switched from the state of being attached to the outer wall (inner wall) of the seamless steel pipe body to the state of being attached to the inner wall (outer wall) to continue the deburring. Under the cooperation of each component, the burrs on the inner and outer walls of the pipe opening of the seamless steel pipe body are all removed, so as to facilitate the subsequent welding use, thereby improving the welding quality and welding efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the pipe opening corner grinding device for the seamless steel pipe.

[0021] Figure 2 It is a structural schematic view of the main body structure in the pipe opening corner grinding device for the seamless steel pipe.

[0022] Figure 3 It is a structural schematic view of another view of the support frame in the pipe opening corner grinding device for the seamless steel pipe.

[0023] Figure 4 It is a structural schematic view of the deflection assembly in the pipe opening corner grinding device for the seamless steel pipe.

[0024] Figure 5 It is a structural schematic view of the connection between the deflection assembly and the switching assembly in the pipe opening corner grinding device for the seamless steel pipe.

[0025] Figure 6 It is a structural schematic view of the elastic member in the pipe opening corner grinding device for the seamless steel pipe.

[0026] Figure 7 It is a structural schematic view of the connection between the elastic member and the mounting plate in the pipe opening corner grinding device for the seamless steel pipe.

[0027] Figure 8 It is a structural schematic view of the positioning member in the pipe opening corner grinding device for the seamless steel pipe.

[0028] In the figure: 1, support frame; 101, T-shaped groove; 2, fixed ring; 3, sleeve ring; 4, seamless steel pipe body; 5, linkage belt; 6, linkage wheel; 7, belt; 701, fixed column; 8, rotating rod; 9, bevel gear set; 10, reciprocating plate; 1001, through groove; 1002, T-shaped block; 11, drive gear; 12, rack plate; 13, mounting plate; 1301, fixed rod; 1302, sliding groove; 14, positioning plate; 1401, positioning groove; 1402, guide surface; 15, fixed shaft; 16, transmission belt; 17, fixed plate; 1701, arc-shaped groove; 18, grinding disc; 19, sliding block; 1901, pulley; 1902, clamping block; 20, sliding rod; 21, spring; 22, pulley. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0030] In addition, the elements in the present application are referred to as "fixed to" or "provided on" another element, which can be directly on another element or can have a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or can have a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0031] Please refer to Figures 1-8 In the embodiments of the present application, a pipe orifice angle grinding device for a seamless steel pipe, a support frame 1 is provided with a mounting plate 13;

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 The above support frame 1 is arranged in a "7" structure, including a horizontal plate and a vertical plate, the mounting plate 13 is arranged on the horizontal plate, and the end of the vertical plate away from the horizontal plate is provided with a base, so that the whole device can stand on the horizontal plane.

[0033] A drive mechanism is arranged on the support frame 1, including a reciprocating assembly and a deflection assembly, the reciprocating assembly includes a reciprocating member slidingly arranged on the support frame 1, when the reciprocating member acts along the length direction of the support frame 1, the deflection assembly can drive the mounting plate 13 to deflect relative to the support frame 1;

[0034] The reciprocating assembly further comprises two groups of pulleys 22 rotatably mounted along the length direction of the support frame 1, and a belt 7 is arranged on the two groups of pulleys 22, and a fixing column 701 is arranged on the belt 7, and the fixing column 701 is in sliding connection with the reciprocating member;

[0035] The reciprocating member comprises a reciprocating plate 10 slidingly arranged on the support frame 1, and a through groove 1001 is formed in the reciprocating plate 10, and the fixing column 701 is slidingly arranged in the through groove 1001;

[0036] Specifically, please refer to Figure 1 、 Figure 2 、 Figure 4 The reciprocating plate 10 is symmetrically fixed with two groups of T-shaped blocks 1002 along the length direction of the reciprocating plate 10, and the T-shaped blocks 1002 are slidingly arranged in T-shaped grooves 101 formed in the support frame 1, and in the initial state, the fixing column 701 is located at the stroke end of the through groove 1001, and the T-shaped block 1002 is located at the stroke end of the T-shaped groove 101, when the belt 7 rotates, the fixing column 701 will rotate synchronously with the belt 7, and drive the reciprocating plate 10 to gradually rise along the T-shaped groove 101, and after the reciprocating plate 10 moves to the stroke end of the T-shaped groove 101, the continuously rotating belt 7 will drive the fixing column 701 to slide along the through groove 1001, and after the fixing column 701 moves to the end of the through groove 1001, the continuously rotating belt 7 will drive the reciprocating plate 10 to gradually descend along the T-shaped groove 101, and then the above process is repeated to make the reciprocating plate 10 reciprocate in the T-shaped groove 101.

[0037] The deflection assembly comprises a drive gear 11 rotatably mounted on the support frame 1, and the drive gear 11 is in meshing engagement with a rack plate 12 fixedly arranged on the reciprocating plate 10;

[0038] Specifically, please refer to Figure 1 、 Figure 2 、 Figure 4 The drive gear 11 is rotatably mounted on the support frame 1, and it is particularly noted that in the process of lifting and lowering the reciprocating plate 10 by the belt 7, the rack plate 12 fixedly arranged on the reciprocating plate 10 will be in meshing transmission rotation state with the drive gear 11, and after the rack plate 12 is separated from the drive gear 11, the rack plate 12 can drive the drive gear 11 to rotate by more than forty-five degrees, and then the rotating drive gear 11 will drive the mounting plate 13 to deflect under the action of the switching assembly.

[0039] Please refer to Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8The pipe orifice angle grinding device of the seamless steel pipe further comprises a switching assembly, which is arranged on the mounting plate 13 and cooperates with a positioning member fixedly arranged on the mounting plate 13 to switch and fix the position of the mounting plate 13 during the deflection of the mounting plate 13 relative to the support frame 1.

[0040] The switching assembly comprises a fixed rod 1301 fixedly arranged on the mounting plate 13, which is in sliding connection with a fixed plate 17 arranged on the support frame 1, and a fixed shaft 15 arranged on the mounting plate 13, one end of which away from the mounting plate 13 is rotatably arranged on the support frame 1, and the fixed shaft 15 is connected with the driving gear 11 through a transmission belt 16.

[0041] Specifically, please refer to Figure 1 、 Figure 5 The fixed plate 17 is provided with an arc-shaped groove 1701, the central angle of which is a right angle, and the fixed rod 1301 is slidingly arranged in the arc-shaped groove 1701, and the mounting plate 13 is provided with a grinding disc 18, the rotating shaft of which is fixedly connected with the output shaft of a second motor fixedly arranged on the mounting plate 13, and the output shaft of the second motor can drive the grinding disc 18 to continuously rotate in the same direction, thereby grinding the pipe orifice of the seamless steel pipe body 4 to eliminate burrs on the inner and outer walls of the pipe orifice.

[0042] Particularly, in actual production, the grinding angle of the pipe orifice is usually thirty degrees, sixty degrees and forty-five degrees, and when the seamless steel pipe body 4 is welded, the pipe orifice of the seamless steel pipe body 4 needs to be ground to eliminate the burrs on the inner and outer walls of the pipe orifice. Preferably, in this embodiment, forty-five degrees is taken as an example for description, that is, in the initial state, the grinding disc 18 and the horizontal ground keep a forty-five degree angle, and after the seamless steel pipe body 4 is clamped on the support frame 1, the inner wall of the pipe orifice of the seamless steel pipe body 4 is in contact with the grinding disc 18, at this time, the second motor is started, and the output shaft of the second motor drives the grinding disc 18 to continuously rotate in the same direction, and the rotating grinding disc 18 can grind the burrs on the inner wall or outer wall of the pipe orifice of the seamless steel pipe body 4, thereby eliminating the burrs on the inner wall of the pipe orifice of the seamless steel pipe body 4.

[0043] The switching assembly further comprises an elastic member slidingly arranged on the mounting plate 13.

[0044] Further, please refer to Figure 6 、 Figure 7The elastic member comprises a sliding rod 20 fixed on the mounting plate 13, a spring 21 is slidingly arranged on the sliding rod 20, one end of the spring 21 is in abutment with the mounting plate 13, and the other end is in abutment with a sliding block 19 slidingly arranged on the sliding rod 20, and a pulley 1901 is rotatably arranged on the sliding block 19;

[0045] In detail, referring to Figure 5 、 Figure 6 、 Figure 7 The left and right sides of the sliding block 19 are fixedly provided with clamping blocks 1902, the clamping blocks 1902 are slidingly arranged in the sliding grooves 1302 formed in the inner wall of the mounting plate 13, so that the clamping blocks 1902 can only slide in the axial direction of the sliding rod 20, and in particular, in the initial state, the spring 21 is in a compressed state, at this time, the spring 21 in the compressed state pushes the sliding block 19 away from the grinding disc 18, at this time, the pulley 1901 rotatably arranged on the sliding block 19 can always keep in a state of being forty-five degrees with the horizontal ground under the cooperation of the positioning member, so as to grind the burrs on the inner wall of the pipe opening of the seamless steel pipe body 4.

[0046] Further, referring to Figure 5 、 Figure 8 The positioning member comprises a positioning plate 14 fixed on the support frame 1, the positioning plate 14 is symmetrically provided with an embedded groove body, and the embedded groove body comprises symmetrically arranged positioning grooves 1401 and guide surfaces 1402;

[0047] In detail, referring to Figure 8The positioning groove 1401 and the guide surface 1402 are symmetrically provided with two groups. In the initial state, the pulley 1901 is located in the positioning groove 1401 away from the vertical plate of the support frame 1. When the belt 7 continuously rotates counterclockwise, the cooperation of the fixed column 701 and the through groove 1001 can drive the reciprocating plate 10 to descend along the length direction of the support frame 1 until the rack plate 12 is engaged with the drive gear 11. When the drive gear 11 rotates, the mounting plate 13 can rotate around the fixed shaft 15 as the center and the arc-shaped groove 1701 as the track under the connection of the transmission belt 16. When the mounting plate 13 rotates, the pulley 1901 will guide the sliding block 19 to gradually approach the grinding disc 18 along the axial direction of the sliding rod 20 under the guidance of the downward inclined guide surface 1402, and the elastic potential energy stored in the spring 21 is increased. When the pulley 1901 moves to the end of the guide surface 1402, the rack plate 12 just drives the drive gear 11 to rotate by forty-five degrees. At this time, the elastic potential energy stored in the spring 21 is the largest. Then, the continuously rotating belt 7 drives the rack plate 12 to continue to rotate the drive gear 11 by a small angle and separate from it. At this time, the pulley 1901 passes through the connecting surface of the two groups of guide surfaces 1402, and then the spring 21 starts to release the elastic potential energy to push the pulley 1901 to contact with the guide surface 1402 and force the sliding block 19 to gradually move away from the grinding disc 18 along the axial direction of the sliding rod 20 until the pulley 1901 contacts with the positioning groove 1401 close to the vertical plate of the support frame 1. At this time, the grinding disc 18 just rotates ninety degrees around the fixed shaft 15 to be attached to the outer wall of the pipe opening of the seamless steel pipe body 4, so as to continue to grind the burrs on the outer wall of the pipe opening of the seamless steel pipe body 4.

[0048] Further, please refer to Figure 1 , Figure 2 , Figure 3 , the support frame 1 is further provided with a fixed ring 2, the fixed ring 2 is rotatably installed with a sleeve ring 3, the sleeve ring 3 is connected with a linkage wheel 6 fixedly arranged on the support frame 1 through a linkage belt 5, the linkage wheel 6 is coaxially and fixedly provided with a rotating rod 8, the rotating rod 8 is fixedly connected with a first motor output shaft fixedly arranged on the support frame 1, and the rotating rod 8 is connected with one of the pulleys 22 through a bevel gear set 9;

[0049] The bevel gear set 9 comprises a first bevel gear and a second bevel gear, the first bevel gear is coaxially and fixedly connected with the rotating rod 8, and the second bevel gear is coaxially and fixedly connected with the pulley 22. When the rotating rod 8 is continuously and synchronously rotated by the first motor, the first bevel gear and the second bevel gear enter the meshing transmission state to drive the pulley 22 to continuously and synchronously rotate, thereby driving the belt 7 to continuously rotate clockwise.

[0050] In detail, please refer to Figure 1 , Figure 2 ,Figure 3 The radius of the sleeve ring 3 is multiple times the radius of the linkage wheel 6. After the first motor is started, the first motor drives the rotating rod 8 to rotate multiple turns, and then the linkage wheel 6 can drive the sleeve ring 3 to rotate one turn. In particular, the rotating speed of the first motor should not be too large, otherwise, the device will vibrate during the polishing process of the burr on the pipe opening of the seamless steel pipe body 4.

[0051] It should be noted that the inner wall of the sleeve ring 3 is provided with a series of clamping assemblies (not shown in the figure) along the circumferential direction of the inner wall. The clamping assemblies can be electric cylinders arranged along the circumferential direction of the inner wall of the sleeve ring 3. The contraction end of the electric cylinder points to the circle of the sleeve ring 3. They are controlled by the same motor and can simultaneously move towards the center of the circle of the sleeve ring 3. Thus, the seamless steel pipe body 4 placed in the sleeve ring 3 is clamped, so that the seamless steel pipe body 4 can be relatively fixed with the sleeve ring 3. The clamping surface at the contraction end of the electric cylinder should be provided with a silica gel pad with a high friction coefficient. The silica gel pad can increase the friction between the sleeve ring 3 and the seamless steel pipe body 4, and at the same time, it can reduce the damage of the clamping assembly to the seamless steel pipe body 4. Thus, the seamless steel pipe body 4 can be firmly fixed on the sleeve ring 3. When the sleeve ring 3 rotates, the seamless steel pipe body 4 can rotate synchronously with the sleeve ring 3, thereby speeding up the burr grinding of the grinding disc 18 on the pipe opening of the seamless steel pipe body 4.

[0052] In particular, after the sleeve ring 3 rotates one turn, the belt 7 drives the reciprocating plate 10 to rise along the length direction of the support frame 1 and enters the meshing transmission state with the drive gear 11. Then, the rotating drive gear 11 drives the grinding disc 18 to deflect under the connection of the transmission belt 16, and the grinding disc 18 is fixed after being deflected by ninety degrees under the cooperation of the elastic member and the positioning member. Thus, the grinding disc 18 can eliminate the burr on the other side of the seamless steel pipe body 4.

[0053] As described above, the pipe opening of the actual seamless steel pipe body 4 is not smooth, especially some cut seamless steel pipe bodies 4, and there are burrs on the inner wall and the outer wall of the cross section of the cut. Such burrs will affect the subsequent welding process. If not treated, it will increase the subsequent welding time and affect the subsequent welding quality and reduce the air tightness after welding. Therefore, in order to improve the quality and efficiency of welding, the burr on the pipe opening needs to be eliminated during use.

[0054] The pipe orifice corner grinding device of the seamless steel pipe utilizes the cooperation between the driving mechanism and the switching assembly, through starting the first motor, driving the sleeve ring 3 and the belt 7 to rotate synchronously, so that the grinding disc 18 can rotate the seamless steel pipe body 4 during the grinding operation, thereby improving the efficiency of burr elimination, and after the sleeve ring 3 drives the seamless steel pipe body 4 to rotate one circle, the belt 7 just drives the rack plate 12 and the driving gear 11 to mesh and rotate, drives the grinding disc 18 and the mounting plate 13 to deflect, and then under the cooperation of the elastic member and the fixing member, the grinding disc 18 is switched to the state of being attached to the inner wall (outer wall) of the seamless steel pipe body 4 in the state of being attached to the outer wall (inner wall) of the seamless steel pipe body 4, and continues to eliminate the burr; under the cooperation of each component, the burrs on the inner and outer walls of the pipe orifice of the seamless steel pipe body 4 are all eliminated, so as to facilitate subsequent welding use, thereby improving the welding quality and welding efficiency.

[0055] It will be obvious to a person skilled in the art that, without departing from the spirit or essential characteristics of the application, the present application can be implemented in other specific forms. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the description given above, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that, although the present specification is described in terms of embodiments, not every implementation embodies an independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A device for grinding the end of a seamless steel pipe, characterized in that, The utility model relates to a support frame (1) is provided with the mounting plate (13) on the support frame (1), drive mechanism, setting up on the support frame (1) includes reciprocating component and deflection subassembly, the reciprocating component includes the reciprocating piece of sliding setting on the support frame (1), when the reciprocating piece is along the length direction of the support frame (1) action, the deflection subassembly can drive the mounting plate (13) and the deflection of support frame (1) occurs, switching subassembly, setting up on the mounting plate (13), when the mounting plate (13) relative the deflection in the process of support frame (1), switching subassembly with the location piece of fixed setting on the mounting plate (13) cooperation, can the position of mounting plate (13) is switched fixed, the reciprocating component still includes the two groups of pulley (22) of rotation installation along the length direction of the support frame (1), two groups of pulley (22) are provided with the belt (7), the belt (7) is provided with fixed column (701), and the fixed column (701) is slidably connected with the reciprocating piece, the reciprocating piece includes the reciprocating plate (10) of sliding setting on the support frame (1), and the reciprocating plate (10) is provided with the through groove (1001) of opening, and the fixed column (701) is slidably arranged in the through groove (1001), the deflection subassembly rotation installation drive gear (11) on the support frame (1), and the drive gear (11) is engaged with the rack plate (12) of fixed setting on the reciprocating plate (10), reciprocating plate (10) is provided with two groups of T-shaped blocks (1002) in its length direction symmetry fixed setting, T-shaped block (1002) is slidably arranged in the T-shaped groove (101) of setting on the support frame (1), and in the initial state, the fixed column (701) is located at the stroke end of through groove (1001), and T-shaped block (1002) is located at the stroke end of T-shaped groove (101), when the belt (7) rotates, the fixed column (701) will rotate with the belt (7) synchronism, and drives the reciprocating plate (10) gradually rises along T-shaped groove (101) until the reciprocating plate (10) moves to the stroke end of T-shaped groove (101), and the belt (7) of continuing to rotate will drive the fixed column (701) along the through groove (1001) sliding until the fixed column (701) moves to the end of through groove (1001), and the belt (7) of continuing to rotate will drive the reciprocating plate (10) gradually falls along T-shaped groove (101), the switching subassembly includes the fixed rod (1301) of fixed setting on the mounting plate (13), the fixed rod (1301) is slidably connected with the fixed plate (17) of setting on the support frame (1), and the mounting plate (13) is provided with fixed shaft (15), and the one end of fixed shaft (15) away from the mounting plate (13) is rotationally installed on the support frame (1), and the fixed shaft (15) is connected with the drive gear (11) through transmission belt (16), and the switching subassembly still includes the elastic member of sliding setting on the mounting plate (13), ​ ​ ​ ​ ​ ​ ​ ​ The elastic member comprises a sliding rod (20) fixed on the mounting plate (13), a spring (21) is slidingly arranged on the sliding rod (20), one end of the spring (21) is in abutment with the mounting plate (13), the other end is in abutment with a sliding block (19) slidingly arranged on the sliding rod (20), and the sliding block (19) is rotatably provided with a pulley (1901).

2. A device for chamfering the corner of a seamless steel pipe mouth according to claim 1, wherein The positioning member comprises a positioning plate (14) fixed on the support frame (1), symmetrically formed embedding groove bodies are arranged on the positioning plate (14), and the embedding groove bodies comprise symmetrically arranged positioning grooves (1401) and guide surfaces (1402).

3. A device for chamfering the corner of a seamless steel pipe mouth according to claim 1, wherein The support frame (1) is further provided with a fixing ring (2), a sleeving ring (3) is rotatably arranged in the fixing ring (2), the sleeving ring (3) is connected with a linkage wheel (6) fixed on the support frame (1) through a linkage belt (5), a rotating rod (8) is coaxially fixed on the linkage wheel (6), the rotating rod (8) is fixedly connected with a first motor output shaft fixed on the support frame (1), and the rotating rod (8) is connected with one of the belt wheels (22) through a bevel gear set (9).

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