CN212216677U - Universal seamless steel pipe bending machine - Google Patents

Abstract

The utility model discloses a universal seamless steel pipe bending machine, which belongs to the technical field of pipe bending machines and comprises a frame, a bending mechanism, a first clamping mechanism and a second clamping mechanism which are respectively clamped at the two end sides of a seamless steel pipe, wherein the first clamping mechanism comprises an upper clamping block and a lower clamping block, the second clamping mechanism comprises an upper clamping plate and a lower clamping plate, the bottom of the lower clamping plate is connected with a hydraulic cylinder, the lower clamping block is connected with a longitudinal slide block which is arranged on a longitudinal screw rod in a connecting way, the longitudinal slide block and the lower clamping plate are respectively and fixedly connected with a top plate, a compression screw is arranged on the top plate in a thread matching way, and a pair of rollers are arranged; the bending mechanism comprises a circular turntable with a slide rail arranged on the front surface, two adjusting slide blocks are arranged on the slide rail, and an upper clamping plate and a lower clamping plate are respectively fixed on the two adjusting slide blocks. The utility model discloses can guarantee seamless steel pipe bending part's radian uniformity, still can adjust the bend radius and control the crooked arc length, the seamless steel pipe that general in different pipe diameters that can be better uses comparatively conveniently.

Description

Universal seamless steel pipe bending machine

Technical Field

The utility model relates to a bending machine technical field, specificly relate to a general seamless steel pipe bending machine.

Background

The seamless steel pipe has a hollow section, is used as a pipeline for conveying a large amount of fluid, such as pipelines for conveying petroleum, natural gas, coal gas, water and certain solid materials, and the like, and can be processed into a bent pipe with a certain curvature in the practical application process, in the prior art, the pipe bending work of the pipeline is generally manually operated by workers, repeated operation is needed for processing a bent pipe, a large amount of manpower is wasted, the workload of pipe bending personnel is increased, the pipe bending machine has the advantages that the pipe bending machine is manually operated by workers, certain potential safety hazards exist, the bending precision of bent pipes is relatively poor, the labor productivity is low, collapse and inner wrinkle are easily generated when some steel pipes with thin wall thicknesses are bent, the appearance of the steel pipes is damaged, and the steel pipes cannot be installed and used.

At present, in the prior art, a seamless steel tube bending machine is disclosed in patent with publication number CN 105583270B, which comprises a frame and two side wings disposed on the frame, a rotation block is rotatably connected between the side wings, a semicircular pipe bending die is detachably connected on the rotation block, a pipe bending groove matched with the seamless steel tube is disposed on the circumferential surface of the pipe bending die, a driving mechanism is disposed on the frame, a support plate is disposed below the rotation block, a support groove matched with the seamless steel tube is disposed on the support plate, a clamping mechanism for clamping the seamless steel tube on the pipe bending die is disposed on the rotation block, a sliding frame is disposed on the side of the side wings, a sliding block is slidably connected on the sliding frame, a plug is disposed at one end of the seamless steel tube, and a high-pressure air source is communicated with the other end of the seamless steel tube bending machine, the structure of the seamless steel tube bending machine is simple and convenient, the pipe bending device can prevent the collapse and the inner wrinkle of steel pipes with thinner wall thickness during pipe bending, and the pipe bending precision is high. However, it has the following problems: the bending die needs to be replaced to meet the application requirements of different bending requirements (different bending radiuses and bending arc lengths), and the application is inconvenient; and the device can not be well adapted to seamless steel pipes with different pipe diameters.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a general seamless steel pipe bending machine, it can prevent that the arc side from taking place to sink or interior wrinkle in the seamless steel pipe, and can guarantee seamless steel pipe bending part's radian uniformity, still can adjust bend radius and control bending arc length, and the commonality that can be better is used for the seamless steel pipe of different pipe diameters, and it is comparatively convenient to use.

2. Technical scheme

In order to solve the above problem, the utility model adopts the following technical scheme:

a universal seamless steel tube bending machine comprises a rack, a bending mechanism, a first clamping mechanism and a second clamping mechanism, wherein the first clamping mechanism and the second clamping mechanism are respectively clamped at two end sides of a seamless steel tube;

the first clamping mechanism comprises an upper clamping block and a lower clamping block which are opposite up and down and are arranged in an aligned mode, the lower clamping block is connected to the longitudinal sliding block through a connecting rod, a top plate extending above the upper clamping block is fixedly connected to the longitudinal sliding block, a threaded hole is formed in the top plate, and a compression screw fixedly connected to the upper clamping block penetrates through the inner thread of the threaded hole in a matched mode;

the bending mechanism comprises a driving shaft vertically connected to the front face of the vertical plate through a bearing and a circular turntable fixedly sleeved on the driving shaft, a gear is fixedly sleeved on the driving shaft, a rack plate connected to the L-shaped frame plate is arranged at the bottom of the gear in a meshed mode, a sliding rail extending along the radius of the front face of the circular turntable is arranged on the radius of the front face of the circular turntable, two adjusting sliders are connected onto the sliding rail in a sliding mode, a positioning assembly is arranged between the sliding rail and the adjusting sliders, an upper clamping plate and a lower clamping plate which are opposite to each other in an up-down mode and aligned mode are respectively fixed on the two adjusting sliders, a roller is arranged on the opposite side of each of the upper clamping plate and the lower;

the second clamping mechanism comprises another group of upper clamping plates and lower clamping plates which are arranged beside the upper clamping plates and the lower clamping plates side by side, the bottom of each lower clamping plate is connected with a hydraulic cylinder which vertically extends downwards and is connected to the bottom in the mounting groove, one side of each lower clamping plate is fixedly connected with another top plate which extends to the upper part of the corresponding upper clamping plate, a threaded hole is formed in each top plate, another compression screw which is fixedly connected to the corresponding upper clamping plate is arranged in a penetrating mode in the threaded hole in an inner thread matching mode, and rollers are arranged on the opposite sides of the group of upper clamping plates and the.

Further, first lead screw slider structure still includes the guide bar that is on a parallel with horizontal lead screw, the one end of horizontal lead screw is connected with positive reverse motor, and the other end of horizontal lead screw is connected to the lateral wall of mounting groove through the bearing on, the both ends of guide bar are fixed respectively to the lateral wall of the corresponding side of mounting groove on, and sliding sleeve is equipped with the guide block with horizontal slider fixed connection on the guide bar. The guide block can only move transversely along the guide rod, and the guide block is fixedly connected with the transverse sliding block, so that the transverse sliding block can be prevented from rotating when the transverse lead screw rotates, the transverse sliding block is enabled to move horizontally along the length direction of the transverse lead screw, and the design requirement is met.

Furthermore, the top plate is in a transverse L shape, the threaded hole is formed in the transverse portion of the top plate, the vertical portion of the top plate is provided with a longitudinally extending sliding groove, and the upper clamping block and the corresponding upper clamping plate are respectively and fixedly provided with a guide plate in sliding connection with the corresponding sliding groove. The setting of spout and deflector can lead the lift removal of going up clamp splice and punch holder to be favorable to preventing to go up clamp splice and punch holder at the in-process off normal of going up and down.

Furthermore, the opposite surfaces of the upper clamping block and the lower clamping block are both concave arc-shaped curved surfaces. Can stably clamp the seamless steel pipe.

Furthermore, the positioning assembly comprises locking holes and two locking screws, wherein the locking holes are formed in the side wall of one side of the sliding rail at equal intervals along the height direction, and the two locking screws are in threaded fit with the locking holes. The locking screw is screwed out of the locking hole, the adjusting slide block can be loosened, the adjusting slide block is allowed to slide up and down along the slide rail, the locking screw is screwed in the locking hole, the adjusting slide block can be compressed, the locking of the adjusting slide block is realized, and the locking of the upper clamping plate and the lower clamping plate can be realized.

Further, both ends side of length direction all is equipped with the vertical measuring benchmark pole of fixing in the mounting groove bottom in the mounting groove, and measures the positive superscript of benchmark pole and has the height scale. The height of the corresponding end of the seamless steel tube can be conveniently known through the measuring marker post with the height scales, so that the horizontal state of the seamless steel tube can be kept when the seamless steel tube is installed, and a good foundation is laid for the subsequent bending treatment of the steel tube.

3. Advantageous effects

(1) The utility model discloses be equipped with first fixture and the second fixture of difference centre gripping seamless steel pipe both ends side, and set up first lead screw slider structure and drive seamless steel pipe lateral shifting, simultaneously through L shape frame plate, the rack board, the cooperation transmission of gear and drive shaft can drive circular carousel and rotate, in using, start the positive reverse motor of first lead screw slider structure, the crooked distolateral use second fixture place department as the fulcrum kickup that can drive seamless steel pipe, when the seamless steel pipe is crooked, the seamless steel pipe removes to its crooked distolateral, realize the bending process to seamless steel pipe, it is comparatively simple to control.

(2) The utility model discloses a first fixture relative and align the last clamp splice and the lower clamp splice that sets up including from top to bottom, second fixture relative and align the punch holder and the lower plate that set up including from top to bottom, through two housing screw in the precession of corresponding threaded hole or screw-out, can adjust the height of punch holder and punch holder respectively to can realize the centre gripping to the seamless steel pipe of different pipe diameters, the better general of this device ability promptly is in the seamless steel pipe of different pipe diameters.

(3) The utility model discloses the inboard at two sets of punch shanks and lower plate all is equipped with a pair of gyro wheel for punch shanks and lower plate allow seamless steel pipe to remove in the direction of perpendicular to slide rail when realizing centre gripping (highly restricted) to the corresponding end of seamless steel pipe, in the bending process of seamless steel pipe, treat on the seamless steel pipe that the part of bending passes through between the gyro wheel in succession, the roll extrusion of the gyro wheel of process both sides, can prevent that the inner arc side of seamless steel pipe from taking place to sink or interior wrinkle, still be favorable to promoting the smooth and easy nature of bending, thereby can guarantee that the radian of seamless steel pipe bending part is unanimous.

(4) The utility model discloses be equipped with first lead screw slider structure and drive seamless steel pipe lateral shifting, in the application, can be according to the crooked arc length of target product, through the unidirectional rotation time of control positive and negative motor that changes, the translation distance of the horizontal slider of control to the translation distance of steerable seamless steel pipe and rack plate, and then the turned angle of steerable circular carousel, finally realize the control to the crooked arc length of seamless steel pipe.

(5) The utility model discloses a vertical lead screw can realize the altitude mixture control to first fixture with vertical slider, can realize the regulation to second fixture through the pneumatic cylinder, and set up the altitude mixture control that can realize a set of punch holder and lower plate on the rotating disc through slide rail and adjusting block's cooperation, thereby can make the bending radius that the punch holder place department that uses the pneumatic cylinder upper end on the bending side of seamless steel pipe is the fulcrum kickup change thereupon, during the application, can adjust adjusting block for the position of slide rail and the position of vertical slider for vertical lead screw according to the bending radius of target product, realize the regulation to bending radius promptly.

To sum up, the utility model discloses can prevent that the arc side from taking place to sink or interior wrinkle in the seamless steel pipe, and can guarantee seamless steel pipe bending part's radian uniformity, still can adjust the bending radius and control the bending arc length, the general seamless steel pipe in different pipe diameters that can be better, it is comparatively convenient to use.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic structural view of section A-A of FIG. 1;

FIG. 3 is an enlarged view of the structure of the area A in FIG. 2;

fig. 4 is a side view of the first clamping mechanism and its driving elevating mechanism.

Reference numerals: 1. mounting grooves; 2. a base; 3. a transverse slide block; 4. a bearing; 5. a lower clamping block; 6. a longitudinal slide block; 7. an upper clamping block; 8. a top plate; 9. a compression screw; 10. a longitudinal lead screw; 11. an L-shaped frame plate; 12. rotating the handle; 13. measuring a benchmark; 14. a rack plate; 15. A gear; 16. a drive shaft; 17. a circular turntable; 18. a slide rail; 19. adjusting the sliding block; 20. A roller; 21. an upper splint; 22. seamless steel pipes; 23. a lower splint; 24. a positive and negative rotation motor; 25. a transverse lead screw; 26. a vertical plate; 27. a hydraulic cylinder; 28. a locking hole; 29. a guide bar; 30. a guide block; 31. a threaded hole; 32. locking the screw; 33. a connecting rod; 34. a chute; 35. a guide plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Examples

As shown in fig. 1 and fig. 2, a universal seamless steel tube bender comprises a frame, a bending mechanism, and a first clamping mechanism and a second clamping mechanism respectively clamped at two end sides of a seamless steel tube, the frame comprises a base 2 provided with a concave mounting groove 1 and a vertical plate 26 connected with the rear side of the base 2, a first lead screw sliding block structure which is transversely arranged is arranged in the mounting groove 1, the first lead screw sliding block structure comprises a transverse lead screw 25 which is driven by a forward and reverse rotation motor 24 and a transverse sliding block 3 which is sheathed on the transverse lead screw 25 in a thread fit way, the upper end of the transverse sliding block 3 is connected with a longitudinal screw rod 10 which is longitudinally arranged through a bearing 4, and the longitudinal screw 10 is sheathed with a longitudinal slide block 6 in a thread fit manner, an inverted L-shaped frame plate 11 is vertically fixed at the rear side of the transverse slide block 3, the upper end of the longitudinal screw rod 10 penetrates through the transverse part of the L-shaped frame plate 11 and is connected with a rotating handle 12;

as shown in fig. 1 and 4, the first clamping mechanism includes an upper clamping block 7 and a lower clamping block 5 which are opposite up and down and are aligned, the lower clamping block 5 is connected to a longitudinal sliding block 6 through a connecting rod 33, a top plate 8 which extends above the upper clamping block 7 is fixedly connected to the longitudinal sliding block 6, a threaded hole 31 is formed in the top plate 8, and a pressing 29 screw 9 which is fixedly connected to the upper clamping block 7 is inserted in the threaded hole 31 in a threaded manner;

as shown in fig. 1 and 2, the bending mechanism includes a driving shaft 16 vertically connected to the front surface of a vertical plate 26 through a bearing 4 and a circular turntable 17 fixedly connected to the driving shaft 16, a gear 15 is fixedly connected to the driving shaft 16, a rack plate 14 connected to an L-shaped frame plate 11 is arranged at the bottom of the gear 15 in a meshing manner, a slide rail 18 extending along the radius of the circular turntable 17 is arranged on one radius of the front surface of the circular turntable 17, as shown in fig. 3, two adjusting sliders 19 are slidably connected to the slide rail 18, a positioning assembly is arranged between the slide rail 18 and the adjusting sliders 19, an upper clamping plate 21 and a lower clamping plate 23 are respectively fixed to the two adjusting sliders 19, the upper clamping plate 21 and the lower clamping plate 23 are respectively arranged at opposite sides, and the two rollers 20 are used for clamping a seamless steel pipe 22;

as shown in fig. 1, the second clamping mechanism includes another set of upper clamping plate 21 and lower clamping plate 23 juxtaposed to the side of the upper clamping plate 21 and lower clamping plate 23, a hydraulic cylinder 27 extending vertically downward and connected to the bottom of the mounting groove 1 is connected to the bottom of the lower clamping plate 23, another top plate 8 extending above the upper clamping plate 21 is fixedly connected to one side of the lower clamping plate 23, a threaded hole 31 is opened on the top plate 8, another compression screw 9 fixedly connected to the corresponding upper clamping plate 21 is inserted into the threaded hole 31 in a threaded manner, and a roller 20 is respectively disposed on the opposite sides of the set of upper clamping plate 21 and lower clamping plate 23.

In this embodiment, as shown in fig. 2, the first lead screw sliding block structure further includes a guide rod 29 parallel to the transverse lead screw 25, one end of the transverse lead screw 25 is connected with a forward and backward rotation motor 24, and the other end of the transverse lead screw 25 is connected to the side wall of the mounting groove 1 through a bearing 4, two ends of the guide rod 29 are respectively fixed to the side wall of the corresponding side of the mounting groove 1, and a guide block 30 fixedly connected with the transverse sliding block 3 is slidably sleeved on the guide rod 29. The guide block 30 can only move transversely along the guide rod 29, and because the guide block 30 is fixedly connected with the transverse sliding block 3, the transverse sliding block 3 can be prevented from rotating when the transverse lead screw 25 rotates, so that the transverse sliding block 3 is enabled to move horizontally along the length direction of the transverse lead screw 25, and the design requirement is ensured to be met.

In the present embodiment, as shown in fig. 4, the top plate 8 is in a transverse "L" shape, the threaded hole 31 is provided in a transverse portion of the top plate 8, a longitudinally extending sliding slot 34 is provided in a vertical portion of the top plate 8, and a guide plate 35 slidably connected to the corresponding sliding slot 34 is fixed to each of the upper clamping block 7 and the corresponding upper clamping plate 21. The sliding groove 34 and the guide plate 35 are arranged to guide the lifting movement of the upper clamping block 7 and the upper clamping plate 21, so that the upper clamping block 7 and the upper clamping plate 21 are prevented from deviating during lifting.

In this embodiment, as shown in fig. 4, the facing surfaces of the upper clamping block 7 and the lower clamping block 5 are both concave arc-shaped curved surfaces. The seamless steel pipe 22 can be clamped more stably.

In the present embodiment, as shown in fig. 2 and 3, the positioning assembly includes locking holes 28 formed on a side wall of the slide rail 18 at equal intervals in the height direction, and two locking screws 32 adapted to the threads of the locking holes 28. The locking screw 32 is screwed out of the locking hole 28, the adjusting slide block 19 can be loosened to allow the adjusting slide block to slide up and down along the slide rail 18, the locking screw 32 is screwed in the locking hole 28, the adjusting slide block 19 can be pressed to realize locking of the adjusting slide block, and the upper clamping plate 21 and the lower clamping plate 23 can be locked.

In this embodiment, as shown in fig. 1 and fig. 2, the measuring poles 13 vertically fixed at the bottom of the mounting groove 1 are respectively arranged at two ends of the mounting groove 1 in the length direction, and the front of the measuring poles 13 is marked with height scales. The height of the corresponding end of the seamless steel tube 22 can be known conveniently through the measuring standard rod 13 with the height scales, so that the horizontal state of the seamless steel tube 22 can be kept when the seamless steel tube 22 is installed, and a good foundation is laid for the subsequent bending treatment of the steel tube.

The specific application process of the universal seamless steel pipe bender is as follows:

firstly, one end of a seamless steel pipe 22 is clamped between an upper clamping block 7 and a lower clamping block 5, the other end of the seamless steel pipe 22 is clamped on the inner sides of two groups of upper clamping plates 21 and lower clamping plates 23, the heights of the upper clamping blocks 7 and the upper clamping plates 21 can be adjusted by screwing in or out two compression screws 9 in corresponding threaded holes 31, and an adjusting slide block 19 can be locked at different positions of a slide rail 18 by using locking screws 32, so that the seamless steel pipes 22 with different pipe diameters can be clamped, namely the device can be better and commonly used for seamless steel pipes 22 with different pipe diameters;

then, the position of the adjusting slide block 19 relative to the slide rail 18 and the position of the longitudinal slide block 6 relative to the longitudinal lead screw 10 are adjusted according to the bending radius of the target product, and the specific operation is as follows: the hydraulic cylinder 27 is started, the rotating handle 12 is rotated, the hydraulic cylinder 27 drives the second clamping mechanism fixed at the top of the second clamping mechanism to move up and down, the rotating handle 12 drives the longitudinal screw rod 10 to rotate, the two ends of the seamless steel tube 22 are limited, so that the longitudinal sliding block 6 cannot rotate, the longitudinal sliding block 6 is enabled to move up and down along the longitudinal screw rod 10, the first clamping mechanism and the second clamping mechanism are kept to be level as much as possible, the longitudinal sliding block 6 can be further finely adjusted by taking the measuring standard rod 13 as a standard, the first clamping mechanism and the second clamping mechanism can be guaranteed to be level, and the level state of the seamless steel tube 22 can be kept; simultaneously, an upper clamping plate 21 and a lower clamping plate 23 connected on the circular turntable 17 move to the two sides clamped on the seamless steel tube 22 along the slide rail 18 and are locked by a locking screw 32;

after the adjustment is finished, the forward and reverse rotation motor 24 is started to drive the transverse lead screw 25 to rotate, due to the guiding action of the guide rod 29 and the guide block 30, the transverse slider 3 moves along the length direction of the transverse lead screw 25, the transverse slider 3 drives the longitudinal lead screw 10 and the L-shaped frame plate 11 to move towards the side of the circular turntable 17, the seamless steel tube 22 and the rack plate 14 are driven to move transversely, the gear 15 is driven to rotate, the drive shaft 16 is driven to rotate, the circular turntable 17 is driven to rotate successfully, the slide rail 18 rotates along with the longitudinal lead screw, the corresponding end side of the seamless steel tube 22 is driven to rotate upwards by the adjusting slider 19 and the upper clamp plate 21 and the lower clamp plate 23 thereon, the bent end side of the seamless steel tube 22 bends upwards with the upper clamp plate 21 at the upper end of the hydraulic cylinder 27 as a fulcrum, and due to the arrangement of the roller 20, the seamless steel tube 22 is allowed to move in the direction, when the seamless steel tube 22 is bent, the seamless steel tube 22 moves towards the bent end side of the seamless steel tube 22, so that the seamless steel tube 22 is bent, and in the process, a part to be bent on the seamless steel tube 22 continuously passes through the rollers 20 and is rolled by the rollers 20 at the two sides, so that the inner arc side of the seamless steel tube 22 can be prevented from collapsing or wrinkling, the smoothness of bending is facilitated, and the radian consistency of the bent part of the seamless steel tube 22 can be ensured;

the translation distance of the transverse sliding block 3 can be controlled by controlling the unidirectional rotation time of the forward and reverse rotation motor 24 according to the bending arc length of a target product, so that the translation distance of the seamless steel pipe 22 and the rack plate 14 can be controlled, the rotation angle of the circular turntable 17 can be controlled, the bending arc length of the seamless steel pipe 22 can be controlled finally, after the forward and reverse rotation motor 24 stops driving, the bending processing of the seamless steel pipe 22 is finished, the forward and reverse rotation motor 24 is started to rotate reversely after the seamless steel pipe 22 is detached from the pipe bender, and the transverse sliding block 3, the rack plate 14 and the circular turntable 17 can be driven to reset so as to be used next time.

According to the above, the utility model discloses can prevent that the arc side from taking place to sink or interior wrinkle in the seamless steel pipe, and can guarantee the radian uniformity of seamless steel pipe bending part, still can adjust the bending radius and control the bending arc length, can be better general in the seamless steel pipe of different pipe diameters, it is comparatively convenient to use.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims (6)

1. A universal seamless steel tube bending machine is characterized by comprising a rack, a bending mechanism, a first clamping mechanism and a second clamping mechanism, wherein the first clamping mechanism and the second clamping mechanism are respectively clamped at two end sides of a seamless steel tube, the rack comprises a base (2) provided with a concave mounting groove (1) and a vertical plate (26) connected to the rear side of the base (2), a transversely arranged first lead screw slider structure is arranged in the mounting groove (1), the first lead screw slider structure comprises a transverse lead screw (25) driven by a forward and reverse motor (24) and a transverse slider (3) sleeved on the transverse lead screw (25) in a threaded adaptation manner, the upper end of the transverse slider (3) is connected with a longitudinally arranged longitudinal lead screw (10) through a bearing (4), a longitudinal slider (6) is sleeved on the longitudinal lead screw (10) in a threaded adaptation manner, an inverted L-shaped frame plate (11) is vertically fixed at the rear side of the transverse slider (3, the upper end of the longitudinal screw rod (10) penetrates through the transverse part of the L-shaped frame plate (11) and is connected with a rotating handle (12);

the first clamping mechanism comprises an upper clamping block (7) and a lower clamping block (5) which are opposite up and down and are arranged in an aligned mode, the lower clamping block (5) is connected to a longitudinal sliding block (6) through a connecting rod (33), a top plate (8) extending above the upper clamping block (7) is fixedly connected to the longitudinal sliding block (6), a threaded hole (31) is formed in the top plate (8), and a compression screw (9) fixedly connected to the upper clamping block (7) penetrates through the inner thread of the threaded hole (31) in a matched mode;

the bending mechanism comprises a driving shaft (16) vertically connected to the front face of a vertical plate (26) through a bearing (4) and a circular turntable (17) fixedly sleeved on the driving shaft (16), a gear (15) is fixedly sleeved on the driving shaft (16), a rack plate (14) connected to an L-shaped frame plate (11) is arranged at the bottom of the gear (15) in a meshing manner, a sliding rail (18) extending along the radius of the front face of the circular turntable (17) is arranged on one radius of the front face of the circular turntable (17), two adjusting sliders (19) are connected onto the sliding rail (18) in a sliding manner, a positioning assembly is arranged between the sliding rail (18) and the adjusting sliders (19), an upper clamping plate (21) and a lower clamping plate (23) which are opposite to each other up and down and are arranged in an aligned manner are respectively fixed onto the two adjusting sliders (19), and a roller (20) is respectively arranged on the, the two rollers (20) are used for clamping the seamless steel tube (22);

the second fixture is including another group of punch holder (21) and lower plate (23) that lie in above-mentioned punch holder (21) and lower plate (23) side by side, and the bottom of this lower plate (23) is connected with a vertical downwardly extending and is connected to pneumatic cylinder (27) of bottom in mounting groove (1), another roof (8) of punch holder (21) top is extended to lower plate (23) one side fixedly connected with, has seted up a screw hole (31) on this roof (8), and another compression screw (9) on corresponding punch holder (21) of fixedly connected to are worn to be equipped with in screw hole (31) internal thread adaptation, and the opposite side of this group of punch holder (21) and lower plate (23) is equipped with a gyro wheel (20) respectively.

2. The universal seamless steel tube bending machine according to claim 1, wherein the first screw slider structure further comprises a guide rod (29) parallel to the transverse screw (25), one end of the transverse screw (25) is connected with a forward and reverse rotation motor (24), the other end of the transverse screw (25) is connected to the side wall of the installation groove (1) through a bearing (4), two ends of the guide rod (29) are respectively fixed to the side wall of the corresponding side of the installation groove (1), and a guide block (30) fixedly connected with the transverse slider (3) is slidably sleeved on the guide rod (29).

3. The universal seamless steel tube bender according to claim 1, characterized in that the top plate (8) is in a transverse L shape, the threaded hole (31) is provided in a transverse portion of the top plate (8), a longitudinally extending sliding slot (34) is provided in a vertical portion of the top plate (8), and a guide plate (35) slidably connected with the corresponding sliding slot (34) is fixed on each of the upper clamping block (7) and the corresponding upper clamping plate (21).

4. The universal seamless steel pipe bender according to claim 1, characterized in that the opposite surfaces of the upper clamping block (7) and the lower clamping block (5) are concave arc-shaped curved surfaces.

5. The universal seamless steel pipe bender according to claim 1, characterized in that the positioning assembly comprises locking holes (28) which are arranged on a side wall of one side of the slide rail (18) at equal intervals along the height direction, and two locking screws (32) which are matched with the threads of the locking holes (28).

6. The universal seamless steel tube bender according to any one of claims 1 to 5, characterized in that both ends of the mounting groove (1) in the length direction are provided with measuring levers (13) vertically fixed at the bottom of the mounting groove (1), and the front surface of each measuring lever (13) is marked with height scales.

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