阅读说明：本技术 一种用于无缝钢管生产用定径机 (Sizing mill for seamless steel pipe production ) 是由 郑元红 吴勉 吴伟 徐贞富 李定杰 田龙 于 2021-06-18 设计创作，主要内容包括：本发明涉及钢管生产技术领域,具体是涉及一种用于无缝钢管生产用定径机,包括,机架；推进装置,推进装置设置于机架的一侧；引导装置,引导装置设置于机架上；定径装置,定径装置可滑动的设置于机架上；其特征在于,所述定径装置包括有一个定径组件和驱动组件；定径组件,定径组件可滑动的设置于机架上；驱动组件,驱动组件固定安装于定径组件的一侧,驱动组件用以驱动定径组件转动,本发明通过推进装置实现了如何对无缝钢管的推进工作,通过引导装置实现了如何对无缝钢管的引导传输工作,通过定径装置实现了如何对无缝钢管进行定径及成型的工作,实现了无缝钢管的自动化定径工作,定径效率高且定径后无缝钢管外壁光滑无压痕。(The invention relates to the technical field of steel pipe production, in particular to a sizing mill for producing seamless steel pipes, which comprises a frame; the propelling device is arranged on one side of the rack; the guiding device is arranged on the rack; the sizing device is arranged on the rack in a sliding manner; the sizing device is characterized by comprising a sizing assembly and a driving assembly; the sizing assembly is arranged on the rack in a sliding manner; the seamless steel pipe sizing device comprises a sizing device, a driving component and a propelling device, wherein the sizing device is used for sizing the seamless steel pipe, the driving component is fixedly arranged on one side of the sizing component and is used for driving the sizing component to rotate.)

1. A sizing mill for producing seamless steel pipes comprises,

a frame (1);

the propelling device (2) is arranged on one side of the rack (1), the output end of the propelling device (2) is arranged towards the rack (1), and the propelling device (2) is used for pushing the seamless steel pipe to move towards the rack (1);

the guide device (3), the guide device (3) is arranged on the frame (1);

the sizing device (4) is arranged on the rack (1) in a sliding manner, and the sizing device (4) is arranged along the long side direction of the rack (1);

it is characterized in that the preparation method is characterized in that,

the sizing device (4) comprises a sizing assembly (5) and a driving assembly (6);

the sizing assembly (5), the sizing assembly (5) is slidably arranged on the rack (1);

the drive assembly (6), drive assembly (6) fixed mounting is in one side of sizing subassembly (5), and drive assembly (6) are used for driving sizing subassembly (5) and rotate.

2. A sizing mill for seamless steel tube production according to claim 1,

sizing subassembly (5) are equipped with the multiunit, divide into first sizing subassembly (7), second sizing subassembly (8) (5) and third sizing subassembly (9), first sizing subassembly (7), second sizing subassembly (8) and third sizing subassembly (9) are arranged in proper order and are set up on frame (1), and first sizing subassembly (7), second sizing subassembly (8) and third sizing subassembly (9) set up along the long limit direction of frame (1), and second sizing subassembly (8) and third sizing subassembly (9) all are the same with first sizing subassembly (7) structure.

3. A sizing mill for seamless steel tube production according to claim 2,

the first diameter fixing component (7) comprises a first mounting rack (10), and the lower end of the first mounting rack (10) is slidably arranged on the rack (1);

the first bearing (11), the first bearing (11) is embedded and installed at the upper end of the first mounting rack (10);

the disc-shaped frame (12), the disc-shaped frame (12) is fixedly arranged on the inner ring of the first bearing (11), and three rolling elements (13) which are equidistantly distributed along the axial direction of the disc-shaped frame (12) are also fixedly arranged in the disc-shaped frame (12);

the annular frame (14), the annular frame (14) is fixedly installed on one side of the disc-shaped frame (12), and the diameter of the annular frame (14) is smaller than that of the disc-shaped frame (12);

the first fluted disc (15), the first fluted disc (15) is installed outside the annular frame (14) in a sleeved mode.

4. A sizing mill for seamless steel tube production according to claim 3,

the rolling element (13) comprises a first fixing frame (16), the fixing frame (16) is arranged in a U shape, one end of the fixing frame (16) is fixedly arranged in the disc-shaped frame (12), and the other end of the fixing frame (16) is arranged towards the axis direction of the disc-shaped frame (12); two sides of the end part of the fixed frame (16) are also fixedly provided with a second bearing (17) in an embedded manner;

the first rotating shaft (18) is arranged in the middle of the second bearing (17) in a crossing mode, and two ends of the first rotating shaft (18) are fixedly connected with the inner ring of the second bearing (17) respectively;

the rolling wheel (19), the rolling wheel (19) is installed in the middle of the first rotating shaft (18) in a sleeved mode.

5. A sizing mill for seamless steel tube production according to claim 4, characterized in that the outer part of each roller (19) of the three rollers (19) has two circular conical surfaces at both ends, and a central circular arc concave surface connected to the two circular conical surfaces, the circular conical surfaces of two adjacent rollers (19) are mutually butted, and the three central circular arc concave surfaces surround to form a circular hole.

6. A sizing mill for seamless steel tube production according to claim 4,

the driving assembly (6) comprises a first support frame (20), the first support frame (20) is arranged along the long side direction of the rack (1), and the first support frame (20) is fixedly arranged on one side of the sizing assembly (5);

the second rotating shaft (21) is rotatably arranged at the end part of the first supporting frame (20) through third bearings (22) fixedly arranged at two ends of the second rotating shaft (21), and the middle part of the second bearing (17) is arranged in a rectangular shape;

the driving fluted discs (23) are divided into a second fluted disc (24), a third fluted disc (25) and a fourth fluted disc (26), the second fluted disc (24), the third fluted disc (25) and the fourth fluted disc (26) are arranged at equal intervals along the axis direction of the second rotating shaft (21), the fixed positions of the second fluted disc (24), the third fluted disc (25) and the fourth fluted disc (26) are arranged in one-to-one correspondence with the first sizing assembly (7), the second sizing assembly (8) and the third sizing assembly (9), and the disc diameters from the second fluted disc (24) to the third fluted disc (25) are gradually reduced;

the gear belts (27), the number of the gear belts (27) is multiple, and the gear belts (27) are respectively used for driving and connecting the driving fluted disc (23) and the first fluted disc (15);

the servo motor (28), the servo motor (28) is set on the frame (1);

and the synchronous belt (29), the synchronous belt (29) is used for driving and connecting the output shaft of the servo motor (28) and the second rotation.

7. A sizing mill for seamless steel tube production according to claim 6,

frame (1) is including a mount table (30) and supporting leg (31), and supporting leg (31) fixed mounting is used for supporting mount table (30) in mount table (30) lower extreme, it runs through respectively to be provided with first spout (32) and second spout (33) still to top-down in the installation, and first spout (32) and second spout (33) set up in mount table (30) surface along the long limit direction of frame (1), and first spout (32) and second spout (33) are used for supplying interval between first sizing subassembly (7), second sizing subassembly (8) and third sizing subassembly (9) sliding adjustment each subassembly, and it is fixed with lock nut (34) after finishing adjusting.

8. A sizing mill for seamless steel tube production according to claim 1,

the propulsion device (2) comprises a second support frame (35), and the second support frame (35) is arranged at one end of the rack (1) along the long edge of the rack (1);

the linear driver (36), the linear driver (36) is fixedly mounted on the second supporting frame (35), and the output end of the linear driver (36) is arranged towards the rack (1);

and the propelling head (37), wherein the propelling head (37) is fixedly arranged at the output end of the linear driver (36).

9. A sizing mill for seamless steel tube production according to claim 1,

the guiding device (3) comprises a third supporting frame (38), and the third supporting frame is vertically arranged in the middle of the propelling device (2) and the sizing device (4);

put frame (39), put frame (39) fixed mounting in the top of third support frame (38), put frame (39) along the long edge direction level setting of third support frame (38), it is a rectangular block to put frame (39), and a V-arrangement opening (40) have still been seted up to the upper end of rectangular block, V-arrangement opening (40) are used for putting seamless steel pipe.

Technical Field

The invention relates to the technical field of steel pipe production, in particular to a sizing mill for producing seamless steel pipes.

Background

The sizing process of the steel pipe is one of important processes on a steel pipe production line, the roundness, the surface roughness, the circumferential residual stress distribution and the like of the steel pipe are directly determined, the currently universal steel pipe sizing equipment adopts a two-roller, three-roller or four-roller extrusion sizing device to carry out sizing, but in the traditional rolling process, because a plurality of groups of rollers are spliced and not integrally formed, the splicing parts of the plurality of groups of rollers can form extrusion impressions on the outer wall of the steel pipe when the steel pipe is sized;

at present, equipment which can finish the sizing work of the steel pipe with high efficiency and does not have extrusion indentation on the outer wall of the steel pipe after sizing is needed.

Disclosure of Invention

In order to solve the technical problem, a sizing mill for producing seamless steel pipes is provided.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

preferably, the sizing mill for seamless steel pipe production comprises,

a frame;

the propelling device is arranged on one side of the rack, the output end of the propelling device faces the rack, and the propelling device is used for pushing the seamless steel pipe to move towards the rack;

the guiding device is arranged on the rack;

the sizing device is arranged on the rack in a sliding manner and is arranged along the long edge direction of the rack;

the sizing device comprises a sizing assembly and a driving assembly;

the sizing assembly is arranged on the rack in a sliding manner;

the drive assembly is fixedly arranged on one side of the sizing assembly and is used for driving the sizing assembly to rotate.

Preferably, the sizing subassembly is equipped with the multiunit, divide into first sizing subassembly, second sizing subassembly and third sizing subassembly, first sizing subassembly, second sizing subassembly and third sizing subassembly are arranged in proper order and are set up in the frame, and first sizing subassembly, second sizing subassembly and third sizing subassembly set up along the long edge direction of frame, and second sizing subassembly and third sizing subassembly all are the same with first sizing subassembly structure.

Preferably, the first diameter fixing component comprises a first mounting frame, and the lower end of the first mounting frame is slidably arranged on the rack;

the first bearing is embedded and arranged at the upper end of the first mounting frame;

the disc-shaped frame is fixedly arranged on the inner ring of the first bearing, and three rolling elements which are equidistantly distributed along the axial direction of the disc-shaped frame are fixedly arranged in the disc-shaped frame;

the annular frame is fixedly arranged on one side of the disc-shaped frame, and the diameter of the annular frame is smaller than that of the disc-shaped frame;

the first fluted disc is sleeved outside the annular frame.

Preferably, the rolling element comprises a first fixing frame, the fixing frame is arranged in a U shape, one end of the fixing frame is fixedly arranged in the disc-shaped frame, and the other end of the fixing frame is arranged towards the axis direction of the disc-shaped frame; two sides of the end part of the fixed frame are also fixedly provided with a second bearing in an embedded manner;

the first rotating shaft stretches across the middle part of the second bearing, and two ends of the first rotating shaft are fixedly connected with the inner ring of the second bearing respectively;

the rolling wheel is sleeved and arranged in the middle of the first rotating shaft.

The outside of each roll pinch roller of three roll pinch rollers has the annular circular conical surface at both ends to and connect in the annular circular arc concave surface placed in the middle of two annular circular conical surfaces, the annular circular conical surface of two adjacent roll pinch rollers contradicts each other and three annular circular arc concave surfaces placed in the middle surround and form a circular port.

Preferably, the driving assembly comprises a first support frame, the first support frame is arranged along the long edge direction of the rack, and the first support frame is fixedly arranged on one side of the sizing assembly;

the second rotating shaft is rotatably arranged at the end part of the first support frame through third bearings fixedly arranged at two ends, and the middle part of the second bearing is arranged in a rectangular shape;

a plurality of driving fluted discs which are divided into a second fluted disc, a third fluted disc and a fourth fluted disc, wherein the second fluted disc, the third fluted disc and the fourth fluted disc are arranged at equal intervals along the axis direction of the second rotating shaft, the fixed positions of the second fluted disc, the third fluted disc and the fourth fluted disc are arranged in one-to-one correspondence with the first sizing assembly, the second sizing assembly and the third sizing assembly, and the disc diameters from the second fluted disc to the third fluted disc are gradually reduced;

the gear belts are provided with a plurality of gear belts which are respectively used for driving and connecting the driving fluted disc and the first fluted disc;

the servo motor is arranged on the rack;

and the synchronous belt is used for driving an output shaft connected with the servo motor to rotate with the second.

Preferably, the frame is including a mount table and supporting leg, and supporting leg fixed mounting is used for supporting the mount table at the mount table lower extreme, still top-down runs through respectively in the installation and is provided with first spout and second spout, and first spout and second spout set up in the mount table surface along the long limit direction of frame, and first spout and second spout are used for supplying first sizing subassembly, second sizing subassembly and third sizing subassembly sliding adjustment interval between each subassembly, and it is fixed with lock nut after finishing adjusting.

Preferably, the propelling device comprises a second support frame, and the second support frame is arranged at one end of the frame along the long edge of the frame;

the linear driver is fixedly arranged on the second support frame, and the output end of the linear driver faces the rack;

the propelling head is fixedly arranged at the output end of the linear driver.

Preferably, the guiding device comprises a third support frame, and the third support frame is vertically arranged in the middle of the propelling device and the sizing device;

the placing frame is fixedly installed on the top end of the third supporting frame, the placing frame is horizontally arranged along the long edge direction of the third supporting frame, the placing frame is a rectangular block, a V-shaped opening is further formed in the upper end of the rectangular block, and the V-shaped opening is used for placing the seamless steel pipe.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention realizes the propelling work of the seamless steel pipe through the propelling device, realizes the guiding transmission work of the seamless steel pipe through the guiding device, realizes the sizing and forming work of the seamless steel pipe through the sizing device, and solves the technical problem of automatically propelling, guiding transmission and sizing the seamless steel pipe.

2. According to the invention, the process of sizing and forming the seamless steel pipe for multiple times is realized through the matching of the first sizing assembly, the second sizing assembly and the third sizing assembly.

3. The invention realizes the process of driving the rolling element to rotate when the rolling element performs sizing on the seamless steel pipe through the matching of the rolling element, the disc-shaped frame and the first bearing, and solves the technical problem that the surface of the seamless steel pipe is indented during sizing of the seamless steel pipe through the rolling element.

4. The invention realizes the process of how to drive the sizing assembly to rotate by matching the servo motor and the driving fluted disc, and solves the technical problem of how to drive the sizing assembly to rotate.

5. The invention solves the technical problem of how to advance the seamless steel tube by matching the linear driver with the advancing head fixedly arranged at the output end.

Drawings

FIG. 1 is a first perspective view of the present invention;

FIG. 2 is a second perspective view of the present invention;

FIG. 3 is a perspective view of a sizing assembly of the present invention;

FIG. 4 is a perspective view of a portion of the sizing assembly of the present invention;

FIG. 5 is a front view of a portion of the sizing assembly of the present invention;

FIG. 6 is a perspective view of the drive assembly of the present invention;

FIG. 7 is a perspective view of the frame, propulsion unit and guide unit of the present invention;

fig. 8 is a perspective view of the guide device of the present invention.

The reference numbers in the figures are:

1-a frame; 2-a propulsion device; 3-a guiding device; 4-sizing device; 5-sizing the assembly; 6-a drive assembly; 7-a first gauge assembly; 8-a second sizing assembly; 9-a third sizing assembly; 10-a first mounting frame; 11-a first bearing; 12-a disc-shaped frame; 13-a rolling element; 14-an annular frame; 15-a first toothed disc; 16-a fixing frame; 17-a second bearing; 18-a first shaft; 19-a rolling wheel; 20-a first support frame; 21-a second rotating shaft; 22-a third bearing; 23-driving a fluted disc; 24-a second toothed disc; 25-a third fluted disc; 26-a fourth fluted disc; 27-a gear belt; 28-servo motor; 29-a synchronous belt; 30-an installation table; 31-supporting legs; 32-a first runner; 33-a second runner; 34-a locking nut; 35-a second support; 36-a linear drive; 37-a pusher head; 38-a third support; 39-placing a frame; 40-V shaped opening.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In order to solve the technical problem of how to finish the sizing operation on the seamless steel pipe, as shown in fig. 1 to 8, the following technical scheme is provided:

a sizing mill for producing seamless steel pipes comprises,

a frame 1;

the propelling device 2 is arranged on one side of the rack 1, the output end of the propelling device 2 is arranged towards the rack 1, and the propelling device 2 is used for pushing the seamless steel pipe to move towards the rack 1;

the guide device 3, the guide device 3 is set up on the framework 1;

the sizing device 4 is arranged on the rack 1 in a sliding manner, and the sizing device 4 is arranged along the long side direction of the rack 1;

the sizing device 4 comprises a sizing assembly 5 and a driving assembly 6;

the sizing assembly 5 is arranged on the rack 1 in a sliding manner;

and the driving assembly 6 is fixedly arranged on one side of the sizing assembly 5, and the driving assembly 6 is used for driving the sizing assembly 5 to rotate.

Specifically, when the sizing operation of the seamless steel pipe is required, a worker firstly puts the heated seamless steel pipe to the end part of the guide device 3, then abuts one end of the seamless steel pipe against the output end of the propulsion device 2, the propulsion device 2 is connected with an external power supply to drive the propulsion device 2 to work after the abutment is finished, the propulsion device 2 drives the seamless steel pipe with the abutted output end to push towards the sizing component 5, then the external power supply is connected to start the driving component 6, the driving component 6 drives the sizing component 5 to rotate, the seamless steel pipe can enter the sizing device 4 more accurately through the guide of the guide device 3, when the seamless steel pipe is pushed into the sizing component 5 through the propulsion device, the seamless steel pipe is rolled and sized through the sizing component 5, and the sizing component 5 in the rotating process can complete the rolling and rolling operation of the outer wall of the seamless steel pipe more comprehensively, so that the outer wall of the seamless steel pipe is smoother.

Further, in order to solve the technical problem of how to size the seamless steel pipe, as shown in fig. 3, the following technical solutions are provided:

sizing subassembly 5 is equipped with the multiunit, divide into first sizing subassembly 7, second sizing subassembly 85 and third sizing subassembly 9, first sizing subassembly 7, second sizing subassembly 8 and third sizing subassembly 9 are arranged in proper order and are set up in frame 1, and first sizing subassembly 7, second sizing subassembly 8 and third sizing subassembly 9 set up along the long edge direction of frame 1, and second sizing subassembly 8 and third sizing subassembly 9 all are the same with first sizing subassembly 7 structure.

Specifically, when seamless steel pipe passes through advancing device 2 and pushes towards first sizing subassembly 7, the tip of seamless steel pipe at first gets into inside first sizing subassembly 7, carries out preliminary sizing work to seamless steel pipe through first sizing subassembly 7, gets into inside second sizing subassembly 8 and the third sizing subassembly 9 afterwards, inside second sizing subassembly 8 and the third sizing subassembly 9 of passing through respectively, final forming, the sizing diameter of first sizing subassembly 7 to third sizing subassembly 9 reduces the setting one by one, and the sizing diameter of third sizing subassembly 9 is final sizing diameter, for more the completion to the sizing work of seamless steel pipe, can also be at every group sizing subassembly one side fixed mounting high frequency coil, let seamless steel pipe heat the softening before carrying out the sizing to more the completion sizing work that still.

Further, in order to solve the technical problem of how to roll the seamless steel tube, as shown in fig. 4 and 5, the following technical solutions are provided:

the first diameter fixing component 7 comprises a first mounting frame 10, and the lower end of the first mounting frame 10 is slidably arranged on the rack 1;

the first bearing 11, the first bearing 11 is mounted on the upper end of the first mounting frame 10 in an embedded manner;

the disc-shaped frame 12 is fixedly arranged on the inner ring of the first bearing 11, and three rolling elements 13 which are equidistantly distributed along the axial direction of the disc-shaped frame 12 are further fixedly arranged in the disc-shaped frame 12;

the annular frame 14, the annular frame 14 is fixedly mounted on one side of the disc-shaped frame 12, the diameter of the annular frame 14 is smaller than that of the disc-shaped frame 12;

the first fluted disc 15 is sleeved outside the annular frame 14.

Specifically, when the seamless steel pipe is pushed towards the first gauge component 7 through the pushing device 2, the end of the seamless steel pipe firstly enters the middle of the rolling element 13 of the first gauge component 7, preliminary rolling is completed on the seamless steel pipe through the rolling element 13, the disc frame 12 is driven to rotate inside the first bearing 11 through the driving of the driving component 6 in the rolling process, the seamless steel pipe is rolled through the matching rolling element 13, and therefore comprehensive rolling work on the seamless steel pipe is achieved.

Further, as shown in fig. 4 and 5:

the rolling element 13 comprises a first fixing frame 16, the fixing frame 16 is arranged in a U shape, one end of the fixing frame 16 is fixedly arranged inside the disc-shaped frame 12, and the other end of the fixing frame 16 is arranged towards the axis direction of the disc-shaped frame 12; two sides of the end part of the fixed frame 16 are also fixedly provided with a second bearing 17 in an embedded manner;

the first rotating shaft 18 is arranged in the middle of the second bearing 17 in a crossing mode, and two ends of the first rotating shaft 18 are fixedly connected with the inner ring of the second bearing 17 respectively;

the rolling wheel 19 is sleeved on the middle part of the first rotating shaft 18.

Each roll pinch roller 19 outside of three roll pinch rollers 19 has the annular circular conical surface at both ends to and connect in the annular circular arc concave surface in the middle of two annular circular conical surfaces, and the annular circular conical surface of two adjacent roll pinch rollers 19 supports each other and three annular circular arc concave surfaces in the middle of surround and form a circular port.

The annular conical surface plays the effect that mutual position was injectd, promptly, when the steel pipe diameter slightly big makes the 19 positions of individual roll pinch roller take place outside displacement, this annular conical surface contradicts each other and makes three roll pinch rollers 19 can be even carry out the sizing to the steel pipe, and its every position of outer wall that can ensure the steel pipe of inside circular port is handled by the sizing, designs more rationally.

Secondly, a locking rod 160 is inserted between the two ends of the fixing frame 16, and the locking rod 160 can prevent the two ends of the fixing frame 16 from being forced to bend inwards or outwards in opposite directions, thereby strengthening the structure.

The two ends of the locking rod 160 are rotatably connected with conical wheels 161, one conical wheel 161 is abutted against one annular conical surface, and the designed conical wheels 161 can ensure that the outer opening of the central annular arc concave surface expands outwards to cause sizing defects. A compression spring 162 is sleeved on the locking rod 160, and two ends of the compression spring 162 are abutted against the tapered wheels 161, and the design of the compression spring 162 can enable the tapered wheels 161 to move synchronously, so that the smoothness of the forced rotation of the roller 19 is improved.

Specifically, the rolling wheel 19 is used for completing the rolling work of the outer wall of the seamless steel tube pushed by the pushing device 2, and through the second bearings 17 fixedly installed at the two ends of the first rotating shaft 18, the rolling wheel 19 can synchronously rotate along with the pushing speed of the seamless steel tube, and no matter the pushing speed of the seamless steel tube is high or low, the rolling wheel 19 can be always attached to the outer wall of the seamless steel tube until the rolling work of the outer wall of the seamless steel tube is completed.

Further, in order to solve the technical problem of how to drive the sizing assembly 5 to rotate, as shown in fig. 6, the following technical solutions are provided:

the driving assembly 6 comprises a first support frame 20, the first support frame 20 is arranged along the long side direction of the rack 1, and the first support frame 20 is fixedly arranged on one side of the sizing assembly 5;

the second rotating shaft 21 is rotatably mounted at the end part of the first support frame 20 through third bearings 22 fixedly mounted at two ends of the second rotating shaft 21, and the middle part of the second bearing 17 is arranged in a rectangular shape;

a plurality of driving toothed discs 23 are arranged, and the driving toothed discs 23 are divided into second toothed discs 24, third toothed discs 25 and fourth toothed discs 26, the second toothed discs 24, the third toothed discs 25 and the fourth toothed discs 26 are arranged at equal intervals along the axis direction of the second rotating shaft 21, the fixed positions of the second toothed discs 24, the third toothed discs 25 and the fourth toothed discs 26 are arranged in one-to-one correspondence with the first sizing assemblies 7, the second sizing assemblies 8 and the third sizing assemblies 9, and the disc diameters of the second toothed discs 24 to the third toothed discs 25 are gradually reduced;

a plurality of gear belts 27, wherein the gear belts 27 are respectively used for driving and connecting the driving fluted disc 23 and the first fluted disc 15;

the servo motor 28, the servo motor 28 is set up on framework 1;

and the synchronous belt 29 is used for driving and connecting the output shaft of the servo motor 28 with the second rotation of the synchronous belt 29.

Specifically, when the first sizing assembly 7, the second sizing assembly 8 and the third sizing assembly 9 need to be driven to rotate respectively, an external power supply is firstly connected to drive the servo motor 28 to rotate, the servo motor 28 drives the second rotating shaft 21 to rotate through the synchronous belt 29 in output end transmission connection, the second rotating shaft 21 drives the driving fluted disc 23 installed in an external sleeving manner and the first sizing assembly 7, the second sizing assembly 8 and the third sizing assembly 9 respectively connected with the driving fluted disc 23 in a transmission manner through the gear belt 27 to rotate in sequence under rotation, and as the disc diameters of the second fluted disc 24 to the third fluted disc 25 are gradually reduced, when the first sizing assembly 7, the second sizing assembly 8 and the third sizing assembly 9 are driven and the three sizing assemblies 5 rotate, the rotating speeds among the three sizing assemblies 5 are respectively set from fast to slow, so that the outer wall of the seamless steel pipe after sizing can be molded more comprehensively, The outer wall of the seamless steel pipe is smoother and has no indentation.

Further, as shown in fig. 7:

frame 1 is including a mount table 30 and supporting leg 31, and supporting leg 31 fixed mounting is used for supporting mount table 30 at the 30 lower extreme of mount table, still top-down runs through respectively in the installation and is provided with first spout 32 and second spout 33, and first spout 32 and second spout 33 set up in mount table 30 surface along the long limit direction of frame 1, and first spout 32 and second spout 33 are used for supplying the interval between each subassembly of first fixed diameter subassembly 7, second fixed diameter subassembly 8 and the sliding adjustment of third fixed diameter subassembly 9, and it is fixed with lock nut 34 after finishing adjusting.

Specifically, need adjust the interval between sizing subassembly 5 as the staff to when reaching better roll-in effect, the staff can be through loosening lock nut 34, then slide along the long limit direction of first spout 32 and second spout 33 to the clearance between first sizing subassembly 7, second sizing subassembly 8 and the third sizing subassembly 9 in proper order and adjust, and the back staff is locking sizing subassembly 5 through lock nut 34 after finishing adjusting can.

Further, in order to solve the technical problem of how to push the seamless steel pipe, as shown in fig. 7, the following technical solutions are provided:

the propulsion device 2 comprises a second support frame 35, and the second support frame 35 is arranged at one end of the frame 1 along the long edge of the frame 1;

the linear driver 36 is fixedly arranged on the second supporting frame 35, and the output end of the linear driver 36 faces the rack 1;

and the propelling head 37, wherein the propelling head 37 is fixedly arranged at the output end of the linear driver 36.

Specifically, the pushing head 37 should collide with the seamless steel tube, and then slowly push the seamless steel tube towards the inside of the sizing assembly 5 under the driving of the linear driver 36, so that the sizing operation of the seamless steel tube is completed through the sizing assembly 5.

Further, in order to solve the technical problem of how to guide and transmit the seamless steel tube, as shown in fig. 8, the following technical solutions are provided:

the guiding device 3 comprises a third supporting frame 38, and the third supporting frame is vertically arranged in the middle of the propelling device 2 and the sizing device 4;

the placing frame 39 is fixedly installed at the top end of the third supporting frame 38, the placing frame 39 is horizontally arranged along the long side direction of the third supporting frame 38, the placing frame 39 is a rectangular block, a V-shaped opening 40 is further formed in the upper end of the rectangular block, and the V-shaped opening 40 is used for placing the seamless steel pipe.

Specifically, under the working condition, a worker firstly puts one end of the seamless steel pipe to the top end of the putting frame 39, then clamps the outer wall of the seamless steel pipe to the V-shaped opening 40, thereby completing the putting limiting work on the seamless steel pipe, then the seamless steel pipe enters the sizing device 4 along the long side direction of the V-shaped opening 40 under the pushing of the pushing device 2, and finally the guiding transmission work on the seamless steel pipe is completed.

The invention realizes the propelling work of the seamless steel pipe through the propelling device 2, realizes the guiding transmission work of the seamless steel pipe through the guiding device 3, realizes the sizing and forming work of the seamless steel pipe through the sizing device 4, realizes the automatic sizing work of the seamless steel pipe, has high sizing efficiency, and has smooth outer wall without indentation after sizing.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.