CN109676039B

CN109676039B - Pipe sizing system

Info

Publication number: CN109676039B
Application number: CN201811512178.9A
Authority: CN
Inventors: 冯伟杰; 朱志峰; 梁波; 蔡之挺; 王韬程; 王明旺
Original assignee: Shouhua Electromechanical Shanghai Co ltd
Current assignee: Shouhua Electromechanical Shanghai Co ltd
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2020-10-23
Anticipated expiration: 2038-12-11
Also published as: CN109676039A

Abstract

The invention discloses a pipe sizing system which comprises a sizing mill and a transfer device, wherein the sizing mill comprises a rack, a die changing mechanism and a sizing mechanism, the sizing mechanism comprises a sizing driving and clamping device, the transfer device is connected with the die changing mechanism, the die changing mechanism and the sizing mechanism are arranged on the rack, and the clamping device is arranged on the die changing mechanism. The pipe sizing system can replace and transfer different sizing dies, realizes the multifunctional sizing on the same system, has small friction force of the die changing mechanism and the transferring device, and is convenient and quick to replace and transfer the sizing dies.

Description

Pipe sizing system

Technical Field

The invention belongs to the field of pipe sizing processing devices, and particularly relates to a pipe sizing system.

Background

The pipe fitting is widely applied to daily life and industrial production, the sleeving between the pipe fittings can be seen everywhere in a pipe network, the sleeving condition is met in that two ends to be sleeved are respectively a narrow end and a wide end, the pipe diameter of the narrow end is smaller than that of the wide end, and the narrow end is sleeved into the wide end to realize sleeving connection. The pipe diameter of the purchased pipe fitting is fixed according to the design requirement, and when two pipe fittings are sleeved or one pipe fitting is sleeved with an equipment port, the port of the pipe fitting to be sleeved is expanded or reduced in diameter, or the pipe diameter of a certain pipe fitting is integrally changed. The prior sizing system has a monotonous process and can only realize single type of sizing. Different processing dies are needed for expanding or reducing the diameter of the pipe fitting, and different dies are needed when the outer diameter of the pipe fitting to be expanded or reduced has larger difference. The machining die needs a sizing driving device for driving operation, in order to reduce cost, a plurality of different dies can share one sizing driving device, and when different machining dies need to be used, the sizing driving device or the position of the machining die is moved. In addition, most of the existing sizing dies adopt hydraulic power as a sizing driving device, and oil leakage is easy to occur due to hydraulic driving.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a pipe sizing system which can replace and transfer different sizing dies, realizes the multifunctional sizing on the same system, has small friction of a die replacing mechanism and a transfer device, and is convenient and quick to replace and transfer sizing dies.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a pipe type sizing system, its characterized in that, includes sizing mill and transfer device, and the sizing mill includes frame, retooling mechanism and sizing mechanism, and sizing mechanism includes sizing drive arrangement and clamping device, and transfer device and retooling mechanism link up, and retooling mechanism and sizing mechanism install in the frame, and clamping device installs in retooling mechanism.

The die change mechanism comprises a die change groove, and the transfer device is provided with a die discharging groove connected with the die change groove.

The transfer device is detachably connected with the sizing mill.

The transfer device is connected with the sizing mill through a clamping device.

The die changing mechanism further comprises a supporting table, and the clamping device is installed on the supporting table.

The supporting table comprises an upper table top, and the clamping device is installed on the upper table top.

The die changing groove penetrates through the board surface of the upper table surface from one side of the upper table surface in a concave mode.

The open end of the upper table-board die changing groove is the rear end, and the end opposite to the rear end is the front end.

The supporting platform further comprises a bottom plate and a supporting plate, the upper table top and the bottom plate are arranged in parallel at intervals, and the supporting plate is arranged between the upper table top and the bottom plate in an enclosing mode to form a non-closed side face.

The clamping device comprises two die clamping devices, and the two die clamping devices are respectively positioned on the upper table surfaces at two sides of the die changing groove.

And the near front ends of the upper table surfaces on the two sides of the die changing groove are respectively provided with a die lifting device.

The bottom plate is provided with a through hole penetrating through the bottom plate, and the through hole of the bottom plate is positioned right above the sizing driving device.

And two sides of the die changing groove are respectively provided with a cam mounting group, a plurality of cam bearing followers are arranged on the cam mounting groups, and the cam bearing followers are arranged in a rotating manner in situ.

The cam mounting group is positioned on one side of the die lifter, which is far away from the die changing groove.

The cam mounting group comprises a first cam mounting plate and a second cam mounting plate which are arranged on the same straight line at intervals, the length directions of the first cam mounting plate and the second cam mounting plate are overlapped and are parallel to the length direction of the die change groove, and a plurality of cam bearing followers are uniformly mounted on the first cam mounting plate and the second cam mounting plate along the length directions of the first cam mounting plate and the second cam mounting plate.

The clamping device is located at the space between the first cam mounting plate and the second cam mounting plate.

Preferably, the two die clamps are respectively positioned at the interval between the first cam mounting plate and the second cam mounting plate on two sides of the die change groove.

At least one row of steel ball rollers are respectively arranged at the two sides of the die changing groove close to the rear end, the steel ball rollers in each row are uniformly arranged, and the arrangement direction of the steel ball rollers in each row is parallel to the length direction of the die changing groove.

The steel ball roller and the die lifter are positioned on the same side of the cam mounting group.

The cam mounting group is arranged to protrude out of the upper table-board.

When the sizing die is arranged on the upper table top along the die changing groove in a sliding mode, the steel ball idler wheel and the cam bearing follower are in sliding contact with the sizing die.

The transfer device comprises an engagement surface, and the engagement surface is provided with a die outlet groove.

The joining surface and the upper table-board are positioned on the same horizontal plane.

The die cavity penetrates through the board surface of the joint surface from one side of the joint surface in a concave mode.

The width of the die discharging groove is equal to that of the die changing groove.

Two sides of the die discharging groove are respectively provided with at least one row of steel ball rollers, a plurality of steel ball rollers in each row are uniformly arranged, and the arrangement direction of the steel ball rollers in each row is parallel to the length direction of the die discharging groove.

When the opening of the die discharging groove and the opening of the die changing groove are spliced and closed, the steel ball rollers on the two sides of the die discharging groove are respectively positioned on the extension lines of the steel ball rollers on the two sides of the die changing groove.

And when the die discharging groove and the die changing groove are spliced and closed, the two hooks are respectively hooked with one hook pin.

The die discharging groove and the die changing groove are spliced and closed, and the sizing die slides to the upper table top or the joint surface along the die discharging groove and the die changing groove.

The bottom of transfer device is equipped with brake wheel and tight pulley.

The die changing mechanism is positioned above the sizing driving device.

The sizing driving device comprises a base, a screw rod mechanism and a driving mechanism, the screw rod mechanism is arranged on the base, the driving mechanism drives the screw rod mechanism to move, and the screw rod mechanism is detachably connected with the sizing die.

The screw mechanism comprises a ball screw and an upper end connecting joint of the ball screw, and the joint is detachably connected with the sizing die.

The joint is positioned right below the through hole on the bottom plate.

The lower end of the joint is connected with a lower connecting rod, and the lower connecting rod is sleeved outside the ball screw and is in threaded connection with the ball screw.

The sizing driving device further comprises a belt wheel mechanism, two ends of the belt wheel mechanism are respectively connected with the screw rod mechanism and the driving mechanism, and the driving mechanism drives the screw rod mechanism through the belt wheel mechanism.

The lower end of the ball screw is connected with a belt wheel mechanism.

The screw mechanism further comprises a positioning mechanism, the ball screw is movably connected with the positioning mechanism, and the positioning mechanism is fixedly connected with the base.

The positioning mechanism comprises a plurality of guide rods and a lower connecting plate which is horizontally arranged, a ball screw and the guide rods penetrate through the lower connecting plate, the ball screw is movably connected with the lower connecting plate, and two ends of each guide rod are respectively and fixedly connected with the lower connecting plate and the base.

The lower connecting plate is horizontally arranged, and the ball screw vertically penetrates through the lower connecting plate.

The plurality of guide rods are parallel to the ball screw and are uniformly arranged around the ball screw.

The positioning mechanism further comprises a sliding plate, a lower connecting plate and the sliding plate are arranged in parallel at intervals, the lower connecting plate is located above the sliding plate, and the ball screw penetrates through the centers of the lower connecting plate and the sliding plate.

A plurality of guide rods penetrate through the lower connecting plate and the sliding plate, the lower ends of the guide rods are fixedly connected with the lower connecting plate, and the upper ends of the guide rods are fixedly connected with the base.

The belt wheel mechanism comprises a first key-free synchronous belt wheel, a second key-free synchronous belt wheel and a belt, the two ends of the belt are respectively sleeved with the first key-free synchronous belt wheel and the second key-free synchronous belt wheel, the first key-free synchronous belt wheel is connected with a driving shaft of the driving mechanism, and the second key-free synchronous belt wheel is connected with the lower end of the ball screw.

Compared with the prior art, the invention has the beneficial effects that: the same system can support and drive different types of sizing moulds, the transfer device detachably connected with the die changing mechanism can be used for integrally replacing and transferring different types of sizing moulds, multifunctional sizing on the same system is realized, the friction force of the die changing mechanism and the transfer device is small, labor-saving and small in abrasion of the die changing mechanism, the sizing moulds are convenient and quick to replace and transfer, the processing field is saved, the utilization rate of equipment is improved, and the mechanical screw rod is adopted for driving and the oil leakage is avoided.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

FIG. 2 is a schematic view of a rack configuration according to an embodiment of the present invention;

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a rear view of FIG. 2;

FIG. 5 is a schematic view of a sizing drive according to an embodiment of the present invention;

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a schematic structural view of a mold changing mechanism according to an embodiment of the present invention;

FIG. 8 is a top view of FIG. 7;

FIG. 9 is a schematic structural diagram of a lift operation apparatus according to an embodiment of the present invention;

fig. 10 is a side view of fig. 9.

Detailed Description

The present invention provides a sizing system for tubes, which is described in more detail and fully below with reference to the following examples. The following examples are illustrative only and are not to be construed as limiting the invention.

A pipe sizing system is shown in figures 1-8 and comprises a sizing mill and a transfer device, wherein the sizing mill comprises a rack, a die changing mechanism and a sizing mechanism, the sizing mechanism comprises a sizing driving device and a clamping device, the transfer device is connected with the die changing mechanism, the die changing mechanism and the sizing mechanism are installed on the rack, and the clamping device is installed on the die changing mechanism.

The frame is a square frame as shown in fig. 2 to 4, an accommodating cavity is formed in the frame, and the sizing driving device and the die changing mechanism are located in the accommodating cavity of the frame. One side of the frame is an opening side, the opening side is an opening state, an operator can conveniently operate the device in the accommodating cavity, and the side opposite to the opening side is a safety door which can be opened or closed. The frame on the opening side of the frame is provided with a grating cover 11, an operation box 12 and a starting box bracket 13. A frame on the safety door side of the frame is provided with a triple box 14, an electromagnetic valve 15 and a three-point combination 16.

The clamping means of the sizing mechanism comprises two die clamps 38. The sizing driving device comprises a base 1, a screw rod mechanism, a belt wheel mechanism and a driving mechanism, wherein the driving mechanism is connected with the screw rod mechanism through the belt wheel mechanism and drives the screw rod mechanism to move, as shown in fig. 5 and 6. The screw mechanism includes a ball screw 24, four guide rods 23, and a lower link plate 21 and a slide plate 22 which are horizontally arranged. The lower connecting plate 21 and the sliding plate 22 are rectangular plates which are arranged in parallel at intervals and have basically the same size, and the central connecting line of the lower connecting plate 21 and the sliding plate 22 is vertical to the lower connecting plate 21 and the sliding plate 22. The guide rods 23 are parallel to the central connecting line, and four guide rods 23 penetrate through the lower connecting plate 21 and the sliding plate 22 and are respectively positioned at four corners of the lower connecting plate 21 and the sliding plate 22. The outer diameter of the part of the guide rod 23 penetrating through the lower connecting plate 21 is smaller than the outer diameter of the other part of the guide rod 23, a nut 231 is arranged at the end part of the guide rod 23 below the lower connecting plate 21, and the guide rod 23 and the lower connecting plate 21 are connected and fixed through the nut 231. The upper ends of the guide rods 23 are connected to the base 1, and the four guide rods 23, the lower connecting plate 21 and the sliding plate 22 are used for supporting and fixing the whole screw mechanism, so that the ball screw 24 can move in the direction vertical to the horizontal direction. The guide rod 23 above the sliding plate 22 is externally sleeved with an oilless bushing 232. The ball screw 24 vertically passes through the centers of the lower connecting plate 21 and the sliding plate 22, the upper end and the lower end of the ball screw 24 are respectively connected with a joint 241 and a belt wheel mechanism, and the joint 241 is used for connecting a sizing die. The lower end of the joint 241 is connected with a lower connecting rod 242, the lower connecting rod 242 is sleeved outside the ball screw 24 and is in threaded connection with the ball screw 24, the ball screw 24 is driven to rotate, the lower connecting rod 242 is pushed to move along the length direction of the ball screw 24, the joint 241 is driven to move synchronously, and the joint 241 drives the sizing die to expand or reduce the diameter of the pipeline. The ball screw 24 is connected to the lower connecting plate 21 through a screw bearing assembly 243. The driving mechanism comprises a servo motor 25 and a speed reducing motor 26, and the servo motor 25 is connected with and drives the speed reducing motor 26. The speed reducing motor 26 is installed on the servo seat 262 through the motor plate 261, the adjusting seat 263 is arranged on the servo seat 262, the adjusting screw 264 penetrates through the adjusting seat 263 and then is connected with the motor plate 261, and the adjusting screw 264 and the adjusting seat 263 adjust and fix the motor plate 261. The servo holder 262 is connected to the positioning plate 265, and the positioning plate 265 is connected and fixed to the base 1 by the second positioning pin 266. The belt wheel mechanism comprises a first key-free synchronous belt wheel 27, a second key-free synchronous belt wheel 28 and a belt 29, the two ends of the belt 29 are respectively sleeved with the first key-free synchronous belt wheel 27 and the second key-free synchronous belt wheel 28, the first key-free synchronous belt wheel 27 is connected with a motor shaft of a speed reducing motor 26, the second key-free synchronous belt wheel 28 is connected with the lower end of a ball screw 24, a servo motor 25 reduces the speed through the speed reducing motor 26 and drives the ball screw 24 through the first key-free synchronous belt wheel 27, the belt 29 and the second key-free synchronous belt wheel 28 in a transmission mode, and the ball screw 24 is driven to rotate.

The die changing mechanism is positioned on the base 1 and above the sizing driving device. As shown in fig. 7 and 8, the mold changing mechanism includes a support table, the support table includes an upper table 31, a bottom plate 32 and a support plate 33, the upper table 31 and the bottom plate 32 are both rectangular, the area of the upper table 31 is larger than that of the bottom plate 32, the upper table 31 and the bottom plate 32 are arranged in parallel at intervals, the support plate 33 surrounds three sides between the upper table 31 and the bottom plate 32, and one side is an opening. The upper table 31 has a mold changing groove, which is a notch, and the mold changing groove penetrates through the surface of the upper table 31 along one side of the upper table 31 in a concave manner to form a concave shape. The orientation of the upper table 31 is defined: the open end of the die changing groove is the rear end, and the end opposite to the rear end is the front end. The die change mechanism is located the holding cavity of frame, the back end of upper table surface 31 is towards the emergency exit of frame, the front end of upper table surface 31 is towards the opening side of frame. The front end of the upper table surface 31 is provided with a switch cover 311, a proximity switch 312, a rear positioning block 313 and a hydraulic buffer 314. The mold lifting device 34 is respectively arranged at the two sides of the mold changing groove of the upper table surface 31 near the front end, two rows of steel ball rollers 35 are respectively arranged at the two sides of the mold changing groove near the rear end, the steel ball rollers 35 in each row are uniformly arranged, and the arrangement direction of the steel ball rollers 35 in each row is parallel to the length direction of the mold changing groove. Two sides of the die change groove of the upper table surface 31 are respectively provided with a cam mounting group, and the cam mounting groups are positioned on the outer sides of the die lifter 34 and the steel ball roller 35 and protrude out of the upper table surface 31. The die lifter 34 is used for lifting the sizing die, and the die lifter 34 may adopt a technical scheme in the prior art, which is not described herein again. The cam mounting group comprises a first cam mounting plate 36 and a second cam mounting plate 37 which are arranged on a straight line at intervals, and the length directions of the first cam mounting plate 36 and the second cam mounting plate 37 are overlapped and are parallel to the length direction of the die change groove. A plurality of cam bearing followers 361 are uniformly mounted on the first cam mounting plate 36 and the second cam mounting plate 37 along the length direction thereof, and the cam bearing followers 361 are rotatably disposed in situ. The sizing die is slidably arranged on the upper table surface 31 along the die changing groove, when the sizing die slides, the steel ball roller 35 and the cam bearing follower 361 are in contact with the sizing die and roll or rotate along with the sliding of the sizing die, and the friction force generated when the sizing die slides is greatly reduced by the rolling of the steel ball roller 35 and the rotation of the cam bearing follower 361, so that the sizing die can conveniently enter or leave the upper table surface 31. The first cam mounting plate 36 and the second cam mounting plate 37 are fixedly connected to the upper table 31 by a first positioning pin 362. A die clamper 38 is arranged at the interval between the first cam mounting plate 36 and the second cam mounting plate 37, and the two die clampers 38 are used for clamping and fixing the sizing die. The two die holders 38 are respectively clamped in grooves on two sides of the die change groove, the die holders 38 are connected with the baffle 381, the baffle 381 abuts against two sides of the upper table top 31, and the baffle 381 is fixed on the upper table top 31 through the rotating shaft 382. The near-rear ends of the two sides of the mold changing groove are respectively provided with a bolt 315, and the two bolts 315 can be taken out and inserted into the jacks of the upper table-board 31. When a sizing die is arranged on the upper table top 31, the plug pin 315 is inserted into the jack to prevent the sizing die on the upper table top 31 from sliding out of the upper table top 31, and when the sizing die is about to enter the upper table top 31 or exit the upper table top 31, the plug pin 315 is pulled out from the jack to remove the block of the plug pin 315. A hook pin 316 is fixed to each of the two cam mounting sets near the rear end.

The bottom plate 32 is provided with a through hole penetrating through the bottom plate 32, the through hole of the bottom plate 32 is positioned right above the joint 241 of the sizing driving device, and after the sizing die is positioned on the upper table surface 31 and fixed, the joint 241 is in contact with and connected with the sizing die.

As shown in fig. 9 and 10, the lifting operation device includes a support 41, a support upper plate 411, a rod connecting plate 413, a box mounting plate 422, and two guide rods 412, wherein the support upper plate 411 and the rod connecting plate 413 are respectively connected to the upper end and the lower end of the support 41, the two guide rods 412 are arranged in parallel and spaced with the support 411, the upper end of each guide rod 412 is connected to the support upper plate 411, the lower ends of the two guide rods 412 are respectively sleeved inside a linear bearing 421, then the rod connecting plate 413 is connected through a cushion 415, and the linear bearing 421 is movably sleeved outside the guide rods 412 and moves along the guide rods 412. The case mounting plate 422 is mounted on the side of the linear bearing 421 away from the support 41, and is disposed to move together with the linear bearing 421. The box mounting plate 422 is provided with a control box 42, the upper end of the support 41 is provided with a chain groove 414, one end of a tank chain 44 is fixedly connected with the chain groove 414, and the other end is coiled in the control box 42. The upper and lower ends of the control box 42 are provided with hanging holes 424 and a handle 423, respectively. A through hole is formed on the upper support plate 411, a hanging rope of the spring balancer 43 passes through the through hole and the hanging rod 431 to be hung on the upper support plate 411, and a hook 432 is arranged at the lower end of the spring balancer 43. The hook 432 and the hanging hole 424 are hooked, the control box 42 is positioned at the upper end of the rack under the action of the spring balancer 43, when the control box needs to be operated, the control box 42 is pulled down through the handle 423 to drive the control box 42 and the linear bearing 421 to move downwards, the linear bearing 421 moves downwards along the guide rod 412, and the tank chain 44 coiled in the control box 42 is unfolded and extended. When the handle 423 is released, the control box 42 and the linear bearing 421 return to move upward by the spring balancer 43, and the tank chain 44 is reeled back into the control box 42. The control box 42 is located at the upper end of the frame when in an idle state, so as to avoid interference to operators and other working equipment on the ground, and when the control box 42 needs to be used, the control box can be quickly pulled down through the handle 423.

The transfer device comprises an engagement surface 51 which is positioned on the same horizontal plane with the upper table-board 31, the engagement surface 51 is used for supporting a sizing die, a die-discharging groove is arranged on the engagement surface 51, and the die-discharging groove penetrates through the board surface of the engagement surface 51 along one side of the engagement surface 51 in a concave manner to form a concave shape. The width of the die discharging groove is equal to the width of the die changing groove of the upper table top 31, two rows of steel ball rollers are respectively arranged on two sides of the die discharging groove, the steel ball rollers in each row are uniformly arranged, and the arrangement direction of the steel ball rollers in each row is parallel to the length direction of the die discharging groove. The transfer device is movable, and the bottom of transfer device is equipped with brake wheel and tight pulley for remove with fixed transfer device. Two hooks 52 are respectively fixed on two sides of the opening end of the mold stripping groove of the transfer device, and two hooks 52 are respectively hooked with a hook pin 316. The transfer device is pushed to move to the opening of the die discharging groove and the opening of the die changing groove of the upper table top 31 to be spliced and gathered, at the moment, the steel ball rollers on the two sides of the die discharging groove are respectively positioned on the extension lines of the steel ball rollers 35 on the two sides of the die changing groove of the upper table top 31, two hooks 52 are respectively hooked with one hook pin 316, and the fixed wheel is closed, so that the transfer device is fixedly connected with the die changing mechanism. The transfer device is used for replacing the sizing die on the upper table top 31, the opening of the die discharging groove and the opening of the die changing groove of the upper table top 31 are spliced and closed, and after the transfer device is fixed, the sizing die on the upper table top 31 is moved to the joint surface 51 of the transfer device along the die changing groove and the die discharging groove, or the sizing die on the joint surface 51 of the transfer device is moved to the upper table top 31.

Finally, it must be said here that: the above embodiments are only used for further detailed description of the technical solutions of the present invention, and should not be understood as limiting the scope of the present invention, and the insubstantial modifications and adaptations made by those skilled in the art according to the above descriptions of the present invention are within the scope of the present invention.

Claims

1. A pipe sizing system is characterized by comprising a sizing mill and a transfer device, wherein the sizing mill comprises a rack, a die changing mechanism and a sizing mechanism, the sizing mechanism comprises a sizing driving device and a clamping device, the transfer device is connected with the die changing mechanism, the die changing mechanism and the sizing mechanism are installed on the rack, and the clamping device is installed on the die changing mechanism;

the die changing mechanism comprises a die changing groove and a supporting table, the supporting table comprises an upper table board (31), the die changing groove penetrates through the board surface of the upper table board (31) inwards towards one side of the upper table board (31), the clamping device is arranged on the upper table board (31), the transferring device is provided with a die discharging groove connected with the die changing groove,

the open end of the upper table top (31) die changing groove is the rear end, the end opposite to the rear end is the front end, the near front ends of the upper table-boards (31) at the two sides of the die changing groove are respectively provided with a die lifter (34), the upper table-board (31) at two sides of the die changing groove is respectively provided with a cam installation set, the cam installation set is provided with a plurality of cam bearing followers (361), the cam bearing followers (361) are arranged in a normal position and in a rotating way, the cam installation set is positioned at one side of the die lifter (34) on the upper table-board (31) far away from the die changing groove, the upper table top (31) at two sides of the die change groove is respectively provided with at least one row of steel ball rollers (35) near the rear end, a plurality of steel ball rollers (35) at each row are uniformly arranged, the arrangement direction of the steel ball rollers (35) at each row is parallel to the length direction of the die change groove, when a sizing die is arranged on the upper table top (31) along the die change groove in a sliding way, the steel ball roller (35) and the cam bearing follower (361) are in sliding contact with the sizing die.

2. The tubular sizing system of claim 1, wherein: the transfer device is detachably connected with the sizing mill.

3. The tubular sizing system of claim 2, wherein: the transfer device is connected with the sizing mill through a clamping device.

4. The tubular sizing system of claim 1, wherein: the supporting platform further comprises a bottom plate (32) and a supporting plate (33), the upper table top (31) and the bottom plate (32) are arranged in parallel at intervals, and the supporting plate (33) is arranged between the upper table top (31) and the bottom plate (32) in an enclosing mode to form a non-closed side face.

5. The tubular sizing system of claim 1, wherein: the clamping device comprises two die clamping devices (38), and the two die clamping devices (38) are respectively positioned on the upper table surfaces (31) on two sides of the die changing groove.

6. The tubular sizing system of claim 4, wherein: the bottom plate (32) is provided with a through hole penetrating through the bottom plate (32), and the through hole of the bottom plate (32) is positioned right above the sizing driving device.

7. The tubular sizing system of claim 1, wherein: the cam mounting group comprises a first cam mounting plate (36) and a second cam mounting plate (37) which are arranged on a straight line at intervals, the length directions of the first cam mounting plate (36) and the second cam mounting plate (37) are overlapped and are parallel to the length direction of the die change groove, and a plurality of cam bearing followers (361) are uniformly mounted on the first cam mounting plate (36) and the second cam mounting plate (37) along the length directions of the cam bearing followers.

8. The tubular sizing system of claim 7, wherein: the clamping means is located at the spacing between the first cam mounting plate (36) and the second cam mounting plate (37).

9. The tubular sizing system of claim 1, wherein: the steel ball roller (35) and the die lifter (34) are positioned on the same side of the cam mounting group.

10. The tubular sizing system of claim 9, wherein: the cam mounting group is arranged to protrude from the upper table surface (31).

11. A tubular sizing system according to any of claims 2 to 10, wherein: the transfer device comprises an engagement surface (51), and the engagement surface (51) is provided with a die outlet groove.

12. The tubular sizing system of claim 11, wherein: the engagement surface (51) and the upper table-board (31) are located on the same horizontal plane.

13. The tubular sizing system of claim 12, wherein: the die-out groove penetrates through the plate surface of the connecting surface (51) in a concave manner towards one side of the connecting surface (51).

14. The tubular sizing system of claim 13, wherein: the width of the die discharging groove is equal to that of the die changing groove.

15. The tubular sizing system according to claim 13 or 14, wherein: two sides of the die discharging groove are respectively provided with at least one row of steel ball rollers, a plurality of steel ball rollers in each row are uniformly arranged, and the arrangement direction of the steel ball rollers in each row is parallel to the length direction of the die discharging groove.

16. The tubular sizing system of claim 15, wherein: when the opening of the die discharging groove and the opening of the die changing groove are spliced and closed, the steel ball rollers at two sides of the die discharging groove are respectively positioned on the extension lines of the steel ball rollers (35) at two sides of the die changing groove.

17. The tubular sizing system of claim 13, wherein: two hooks (52) are respectively fixed on two sides of the opening end of the die discharging groove, two hook pins (316) are fixed on the die changing mechanism, and when the die discharging groove and the die changing groove are spliced and closed, the two hooks (52) are respectively hooked with one hook pin (316).

18. The tubular sizing system of claim 13, wherein: the die discharging groove and the die changing groove are spliced and closed, and the sizing die slides to the upper table top (31) or the joining surface (51) along the die discharging groove and the die changing groove.

19. The tubular sizing system of claim 11, wherein: the bottom of transfer device is equipped with brake wheel and tight pulley.

20. A tubular sizing system according to any of claims 1 to 10, wherein: the die changing mechanism is positioned above the sizing driving device.

21. The tubular sizing system of claim 20, wherein: the sizing driving device comprises a base (1), a screw rod mechanism and a driving mechanism, wherein the screw rod mechanism is arranged on the base (1), the driving mechanism drives the screw rod mechanism to move, and the screw rod mechanism is detachably connected with the sizing die.

22. The tubular sizing system of claim 21, wherein: the screw mechanism comprises a ball screw (24), the upper end of the ball screw (24) is connected with an oil cylinder joint (241), and the oil cylinder joint (241) is detachably connected with a sizing die.

23. The tubular sizing system of claim 22, wherein: the oil cylinder joint (241) is positioned right below the through hole on the bottom plate (32).

24. The tubular sizing system of claim 23, wherein: the lower end of the oil cylinder joint (241) is connected with a lower connecting rod (242), and the lower connecting rod (242) is sleeved outside the ball screw (24) and is in threaded connection with the ball screw (24).

25. The tubular sizing system of claim 23, wherein: the sizing driving device further comprises a belt wheel mechanism, two ends of the belt wheel mechanism are respectively connected with the screw rod mechanism and the driving mechanism, and the driving mechanism drives the screw rod mechanism through the belt wheel mechanism.

26. The tubular sizing system of claim 25, wherein: the lower end of the ball screw (24) is connected with a belt wheel mechanism.

27. The tubular sizing system of claim 23, wherein: the screw mechanism further comprises a positioning mechanism, the ball screw (24) is movably connected with the positioning mechanism, and the positioning mechanism is fixedly connected with the base (1).

28. The tubular sizing system of claim 27, wherein: the positioning mechanism comprises a plurality of guide rods (23) and a lower connecting plate (21) which is horizontally arranged, a ball screw (24) and the guide rods (23) penetrate through the lower connecting plate (21), the ball screw (24) is movably connected with the lower connecting plate (21), and two ends of each guide rod (23) are respectively and fixedly connected with the lower connecting plate (21) and the base (1).

29. The tubular sizing system of claim 28, wherein: the lower connecting plate (21) is horizontally arranged, and the ball screw (24) vertically penetrates through the lower connecting plate (21).

30. The tubular sizing system of claim 29, wherein: the guide rods (23) are parallel to the ball screw (24) and are uniformly arranged around the ball screw (24).

31. The tubular sizing system of claim 30, wherein: the positioning mechanism further comprises a sliding plate (22), the lower connecting plate (21) and the sliding plate (22) are arranged in parallel at intervals, the lower connecting plate (21) is located above the sliding plate (22), and the ball screw (24) penetrates through the centers of the lower connecting plate (21) and the sliding plate (22).

32. The tubular sizing system of claim 31, wherein: a plurality of guide rods (23) penetrate through the lower connecting plate (21) and the sliding plate (22), the lower ends of the guide rods (23) are fixedly connected with the lower connecting plate (21), and the upper ends of the guide rods are fixedly connected with the base (1).

33. The tubular sizing system of claim 25, wherein: the belt wheel mechanism comprises a first key-free synchronous belt wheel (27), a second key-free synchronous belt wheel (28) and a belt (29), wherein the two ends of the belt (29) are respectively sleeved with the first key-free synchronous belt wheel (27) and the second key-free synchronous belt wheel (28), the first key-free synchronous belt wheel (27) is connected with a driving shaft of the driving mechanism, and the second key-free synchronous belt wheel (28) is connected with the lower end of the ball screw (24).