CN111203458B

CN111203458B - Pipe orifice shaping machine for pipeline welding

Info

Publication number: CN111203458B
Application number: CN202010154658.3A
Authority: CN
Inventors: 王白石
Original assignee: Kunshan Zhengan Fluid Equipment Co ltd
Current assignee: Kunshan Zhengan Fluid Equipment Co ltd
Priority date: 2020-03-08
Filing date: 2020-03-08
Publication date: 2023-02-28
Anticipated expiration: 2040-03-08
Also published as: CN111203458A

Abstract

The invention discloses a pipe orifice shaping machine for pipeline welding, which belongs to the technical field of pipe orifice shaping machines and comprises a base, wherein a gear is installed at the power end of the right side of a motor through a speed reducer, the top of the gear is meshed with the bottom of a transmission gear, a pipe orifice shaping assembly is installed at the top of a thread adjusting rod through a bearing, limiting rods are arranged on the left side and the right side of the joint of the outer wall of the bottom of the pipe orifice shaping assembly and the thread adjusting rod, the bottom of each limiting rod extends to the outer wall of the bottom of the base, after a pipe is fixed, the thread adjusting rod is rotated to enable the pipe orifice shaping assembly to ascend, a lower compression roller and the outer wall of the bottom of the pipe are in the same horizontal line, then a screw rod is rotated to enable a U-shaped movable seat to move towards the left side, the outer wall of the bottom of the pipe is positioned between the upper compression roller and the lower compression roller, a movable plate is descended through rotation of the threaded rod, at the moment, the upper compression roller is abutted against the inner wall of the pipe, and the motor drives the pipe to rotate so as to shape the pipe orifice.

Description

Pipe orifice shaping machine for pipeline welding

Technical Field

The invention relates to the technical field of pipe orifice shaping machines, in particular to a pipe fitting pipe orifice shaping machine for pipeline welding.

Background

The common connection mode of metal pipeline is flange and welding two kinds, when welding the pipeline, the circularity uniformity requirement of weld crater is stricter, if the circularity uniformity precision of tube socket department is not enough, can lead to the welding seam to increase, will cause welding defects such as burn-through, leak welding, incomplete penetration, the plastic method commonly used at present welds the part of will aliging at whole circle weld crater earlier, then adopts heating and hammering method to force to make the heating part warp, but this kind of mode plastic effect is relatively poor, rely on the manual work to carry out and hardly keep the precision, for this reason, we provide a pipe fitting mouth of pipe trimmer for pipeline welding.

Disclosure of Invention

The invention aims to provide a pipe orifice shaper for pipeline welding, which solves the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a pipe fitting mouth of pipe trimmer for pipeline welding, includes the base, base top outer wall left and right sides is equipped with the supplementary piece and the fixed plate of propping of pipe fitting respectively, the mounting hole that link up about fixed plate right side outer wall top is equipped with, and the dwang is installed through the bearing to the mounting hole inner chamber, both ends extend to the fixed plate both sides and are equipped with carousel and drive gear respectively about the dwang, fixed plate right side outer wall middle part is equipped with the motor, motor right side power end installs the gear through the reduction gear, gear top and drive gear bottom meshing, carousel left side outer wall center is equipped with the spliced pole, the spliced pole hoop outer wall is close to the one end annular array of carousel and is equipped with three electric putter groups, carousel left side outer wall is equipped with three spout groups with the outside annular array of spliced pole junction, sliding connection has the clamp splice in the spout, clamp splice activity is pegged graft and is kept away from one end of spliced pole at electric putter, just clamp splice left side outer wall is equipped with the screw with the dead lever matched with, just the electric putter outer wall is equipped with the screw that link up from top and the left and right side of the supplementary junction of pipe fitting, is equipped with the screw thread regulation pole, is equipped with the screw regulation pole about the screw regulation pole, the top outer wall of the base top is equipped with the outer wall of the plastic and all extends to the spacing pole bottom of pole.

Further, mouth of pipe plastic subassembly is including setting up the installing frame at screw thread adjusting rod top, the lead screw is installed through the bearing to installing frame right side inner wall, the lead screw left end extends to installing frame left side outer wall and is equipped with the rocking handle, the lead screw overlaps with the junction cover of installing frame left side outer wall and is equipped with the bearing, installing frame bottom inner wall is equipped with the activity groove, and sliding connection has a U type sliding seat in the activity groove, U type sliding seat top extends to installing frame top outer wall, installing frame top outer wall is equipped with the fluting with U type sliding seat matched with, U type sliding seat thread bush is established at the lead screw outer wall, both sides all are equipped with the activity groove around U type sliding seat left side stretches out the end, and two sets of activity inslot sliding bush are equipped with the fly leaf, the bull stick is installed through bearing in fly leaf right-hand member face center, bull stick outer wall cover is equipped with the compression roller, U type sliding seat inner chamber is equipped with down the compression roller, fly leaf and U type sliding seat left side outer wall middle part all are equipped with the connecting block, the top bottom outer wall installs the threaded rod through the bearing, the threaded rod bottom outer wall, the threaded rod extends to bottom connecting block bottom outer wall and is equipped with the bottom connecting block.

Furthermore, the outer wall of the left side of the auxiliary pipe supporting piece is provided with a channel which is through from left to right, a pull rod is movably inserted in the center of the outer wall of the top of the auxiliary pipe supporting piece, the bottom of the pull rod extends to the inside of the channel and is provided with a tightening plate, the outer wall of the top of the tightening plate is uniformly provided with a supporting spring, the top of the supporting spring is connected with the inner wall of the top of the channel, the outer walls of the front side and the rear side of the auxiliary pipe supporting piece are movably inserted with inserted rods, two groups of the opposite ends of the inserted rods extend to the inner cavity of the channel and are provided with auxiliary clamping blocks, two groups of the opposite ends of the inserted rods extend to the outer wall of the auxiliary pipe supporting piece and are provided with fixing pieces, springs are fixedly arranged on the outer sides of the joints of the fixing pieces and the inserted rods, and are fixedly connected with the outer walls of the auxiliary pipe supporting piece and sleeved with the springs.

Further, the left side annular array of spliced pole hoop outer wall and electric putter junction is equipped with three mounting grooves of group, the activity is pegged graft in the mounting groove has the kicking block, three groups the relative one side outer wall of kicking block is equipped with reset spring, reset spring's the other end and the mounting groove inner wall connection, just kicking block longitudinal section is right trapezoid, the kicking block is close to the cross-sectional width that spliced pole one side is greater than the cross-sectional width of keeping away from spliced pole one side, just the kicking block left side is the inclined plane.

Furthermore, the outer wall of the left side of the pipe fitting auxiliary supporting piece is movably inserted with a positioning rod at the top of the joint of the channel, and the outer wall of the left side of the pull rod is provided with a height adjusting hole matched with the positioning rod.

Furthermore, an auxiliary supporting block is arranged on the left side of the joint of the outer wall of the top of the base and the fixing plate, the top of the auxiliary supporting block is attached to the bottom of the rotary table, and an annular sliding groove matched with the auxiliary supporting block is arranged on the outer wall of the rotary table in the circumferential direction.

Furthermore, an inclined strut is installed on the right side of the joint of the rotating rod and the upper pressing roller through a bearing, and the top of the inclined strut is connected with the top of the outer wall of the right side of the movable plate.

Furthermore, ball grooves are uniformly formed in the outer wall of one side, the outer wall of the bottom of the abutting plate and the inner wall of the bottom of the channel, which are opposite to the two groups of auxiliary clamping blocks, and balls are arranged in the ball grooves.

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

1. after the pipe fitting is fixed, the screw thread adjusting rod is rotated to enable the pipe orifice shaping assembly to ascend, the lower pressing roller and the outer wall of the bottom of the pipe fitting are located on the same horizontal line, then the screw rod is rotated to enable the U-shaped movable seat to move towards the left side, the outer wall of the bottom of the pipe fitting is located between the upper pressing roller and the lower pressing roller, the movable plate descends by rotating the threaded rod, the upper pressing roller abuts against the inner wall of the pipe fitting downwards, and the motor drives the pipe fitting to rotate so as to shape the pipe orifice;

2. when the pipe fitting inserts, at first upwards stimulate the pull rod make to support tight board and upwards open, then make supplementary tight piece of clamp open to both sides pulling inserted bar, can loosen pull rod and inserted bar after inserting the pipe fitting this moment, support tight board and supplementary tight piece of clamp and support the outer wall of tight pipe fitting under the drive that resets of supporting spring and spring, make the pipe fitting rotation more steady, and the kicking block plays the heart effect when the pipe fitting inserts, make reset spring compression, the elasticity that reset spring deformation produced makes the kicking block support tight pipe fitting inner wall, make the center of pipe fitting coincide with the center of spliced pole, the electric putter of being convenient for drives the clamp splice and fixes the pipe fitting right-hand member.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of the turntable of the present invention;

FIG. 3 is a schematic view of the installation of the threaded adjusting rod and the mounting frame of the present invention;

fig. 4 is a left side view of the auxiliary supporting member for pipe fittings of the invention.

In the figure: 1. a base; 2. a tube auxiliary stay; 3. a fixing plate; 4. rotating the rod; 5. a transmission gear; 6. a motor; 7. a gear; 8. a turntable; 9. connecting columns; 10. an electric push rod; 11. a chute; 12. a clamping block; 13. fixing the rod; 14. mounting grooves; 15. a return spring; 16. a top block; 17. a threaded adjusting rod; 18. a limiting rod; 19. a pipe orifice shaping component; 20. installing a frame; 21. a screw rod; 22. a U-shaped movable seat; 23. a movable plate; 24. a rotating rod; 25. an upper compression roller; 26. a diagonal brace; 27. a lower pressing roller; 28. connecting blocks; 29. a threaded rod; 30. positioning a rod; 31. a support spring; 32. a ball bearing; 33. inserting a rod; 34. a spring; 35. a fixing sheet; 36. an auxiliary clamping block; 37. a pull rod; 38. a propping plate; 39. and an auxiliary supporting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The invention provides a technical scheme that: a pipe orifice shaper for pipeline welding, please refer to fig. 1-2, comprises a base 1, the left and right sides of the outer wall of the top of the base 1 are respectively provided with a pipe auxiliary support member 2 and a fixing plate 3, the top of the outer wall of the right side of the fixing plate 3 is provided with a mounting hole which is through from left to right, the inner cavity of the mounting hole is provided with a rotating rod 4 through a bearing, the left and right ends of the rotating rod 4 extend to the two sides of the fixing plate 3 and are respectively provided with a turntable 8 and a transmission gear 5, the middle part of the outer wall of the right side of the fixing plate 3 is provided with a motor 6, the motor 6 is powered by an external power supply, the power end of the right side of the motor 6 is provided with a gear 7 through a reducer, the top of the gear 7 is meshed with the bottom of the transmission gear 5, the center of the outer wall of the left side of the turntable 8 is provided with a connecting column 9, when the pipe fitting fixing device is used, one end of a pipe fitting is inserted into the pipe fitting auxiliary supporting piece 2, the right end of the pipe fitting abuts against the outer wall of the left side of the rotary table 8, then the electric push rod 10 is started to enable the clamping block 12 to abut against the inner wall of the pipe fitting to fix the pipe fitting, then the motor 6 is started to enable the gear 7 to drive the transmission gear 5, the rotating rod 4, the rotary table 8 and the pipe fitting to rotate, the electric push rod 10 adopts a storage battery to supply power, a cavity is arranged at one side of the joint of the connecting column 9 and the rotary table 8, and the storage battery is arranged in the cavity;

referring to fig. 1-2, a clamping block 12 is movably inserted into one end of an electric push rod 10 far from a connecting column 9, a screw hole is formed in the outer wall of the left side of the clamping block 12, a fixing rod 13 is arranged in the screw hole, a screw hole matched with the fixing rod 13 is formed in the outer wall of the electric push rod 10, the clamping block 12 is convenient to remove and replace, the clamping block 12 is generally an arc-shaped block and is suitable for the inner wall of a pipe fitting, a vertically through screw hole is formed in the left side of the joint of the outer wall of the top of a base 1 and an auxiliary supporting piece 2 of the pipe fitting, a thread adjusting rod 17 is arranged in the screw hole, a pipe orifice shaping assembly 19 is mounted at the top of the thread adjusting rod 17 through a bearing, limiting rods 18 are arranged on the left side and the right side of the joint of the outer wall of the bottom of the pipe orifice shaping assembly 19 and the thread adjusting rod 17, the bottoms of the limiting rods 18 extend to the outer wall of the bottom of the base 1, and the pipe orifice shaping assembly 19 is located below the passage of the auxiliary supporting piece 2 before the pipe fitting is inserted into the auxiliary supporting piece 2, and insertion of the pipe fitting is not affected;

referring to fig. 3, the pipe orifice shaping assembly 19 includes a mounting frame 20 disposed on the top of a threaded adjusting rod 17, a lead screw 21 is mounted on the inner wall of the right side of the mounting frame 20 through a bearing, a crank is disposed on the outer wall of the left side of the mounting frame 20 at the left end of the lead screw 21, a bearing is sleeved at the joint of the lead screw 21 and the outer wall of the left side of the mounting frame 20, a movable groove is disposed on the inner wall of the bottom of the mounting frame 20, a U-shaped movable seat 22 is slidably connected in the movable groove, the top of the U-shaped movable seat 22 extends to the outer wall of the top of the mounting frame 20, a slot matched with the U-shaped movable seat 22 is disposed on the outer wall of the lead screw 21 at the top, movable grooves are disposed on the front and rear sides of the left extending end of the U-shaped movable seat 22, movable plates 23 are slidably sleeved in the two groups of movable grooves, a rotating rod 24 is mounted at the center of the right end surface of the movable plate 23 through a bearing, an upper compression roller 25 is sleeved on the outer wall of the rotating rod 24, a lower compression roller 27 is arranged in the inner cavity of the U-shaped movable seat 22, connecting blocks 28 are arranged in the middle of the outer walls of the left sides of the movable plate 23 and the U-shaped movable seat 22, a threaded rod 29 is mounted on the outer wall of the bottom of the top connecting block 28 through a bearing, a rocking handle is arranged on the outer wall of the bottom of the threaded rod 29 extending to the outer wall of the bottom connecting block 28, after the pipe fitting is fixed, the pipe orifice shaping assembly 19 is lifted by rotating the threaded adjusting rod 17, the lower compression roller 27 and the outer wall of the bottom of the pipe fitting are in the same horizontal line, then the U-shaped movable seat 22 moves to the left side by rotating the threaded rod 21, the outer wall of the bottom of the pipe fitting is located between the upper compression roller 25 and the lower compression roller 27, the movable plate 23 is lowered by rotating the threaded rod 29, the upper compression roller 25 abuts against the inner wall of the pipe fitting downwards, and the motor 6 drives the pipe fitting to rotate so as to shape the pipe orifice;

referring to fig. 4, a left outer wall of the auxiliary pipe supporting member 2 is provided with a left-right through channel, a pull rod 37 is movably inserted into the center of the top outer wall of the auxiliary pipe supporting member 2, the bottom of the pull rod 37 extends into the channel and is provided with a tightening plate 38, the top outer wall of the tightening plate 38 is uniformly provided with a support spring 31, the top of the support spring 31 is connected with the top inner wall of the channel, the outer walls of the front side and the rear side of the auxiliary pipe supporting member 2 are movably inserted with an insertion rod 33, one end of each of two groups of insertion rods 33 opposite to each other extends into an inner cavity of the channel and is provided with an auxiliary clamping block 36, one end of each of the two groups of insertion rods 33 opposite to each other is provided with a fixing plate 35, the outer side of the connection between the fixing plate 35 and the insertion rod 33 is fixedly connected with the outer wall of the auxiliary pipe supporting member 2, and the spring 34 is sleeved on the outer wall of the insertion rod 33, when a pipe is inserted, the pipe is firstly, the pull rod 37 is pulled upwards to open the tightening plate 37 and the auxiliary clamping block 33 drives the outer wall of the pipe to be tightened, so that the pipe rotates more stably;

referring to fig. 1, three sets of mounting grooves 14 are formed in an annular array on the left side of the joint of the outer circumferential wall of the connecting column 9 and the electric push rod 10, a top block 16 is movably inserted in each mounting groove 14, a return spring 15 is arranged on the outer wall of one side, opposite to the three sets of top blocks 16, the other end of each return spring 15 is connected with the inner wall of the corresponding mounting groove 14, the longitudinal section of each top block 16 is in a right trapezoid shape, the section width of one side, close to the connecting column 9, of each top block 16 is larger than the section width of one side, far away from the connecting column 9, the left side of each top block 16 is an inclined surface, each top block 16 plays a centering role when a pipe is inserted, the top blocks 16 are extruded inwards when the pipe is inserted, so that the return springs 15 compress the top blocks 16, elastic force generated by deformation of the return springs 15 enables the top blocks 16 to abut against the inner wall of the pipe, the center of the pipe coincides with the center of the connecting column 9, and the electric push rod 10 drives the clamp blocks 12 to fix the right end of the pipe;

referring to fig. 4, a positioning rod 30 is movably inserted into the top of the joint of the left outer wall of the pipe fitting auxiliary supporting member 2 and the channel, and a height adjusting hole matched with the positioning rod 30 is formed in the left outer wall of the pull rod 37, when the pull rod 37 is operated, the positioning rod 30 can be inserted and fixed, and then any one group of the insertion rods 33 is pulled and then inserted into the pipe fitting, so that the single-person operation can be realized;

referring to fig. 1, an auxiliary supporting block 39 is arranged on the left side of the joint of the outer wall of the top of the base 1 and the fixed plate 3, the top of the auxiliary supporting block 39 is attached to the bottom of the turntable 8, and an annular chute matched with the auxiliary supporting block 39 is arranged on the outer wall of the turntable 8 in the circumferential direction to support the turntable 8 in an auxiliary manner, so that the turntable 8 rotates more stably;

referring to fig. 3, an inclined strut 26 is mounted on the right side of the joint of the rotating rod 24 and the upper press roll 25 through a bearing, the top of the inclined strut 26 is connected with the top of the outer wall of the right side of the movable plate 23, and the rotating rod 24 and the upper press roll 25 are reinforced, so that the upper press roll 25 operates stably and the shaping effect is improved;

referring to fig. 4, ball grooves are uniformly formed on the outer wall of the opposite side of the two sets of auxiliary clamping blocks 36, the outer wall of the bottom of the resisting plate 38 and the inner wall of the bottom of the channel, and balls 32 are arranged in the ball grooves to reduce friction with the pipe and maintain the smoothness of rotation of the pipe.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A pipe orifice shaper for pipeline welding, includes base (1), its characterized in that: the pipe fitting auxiliary supporting piece (2) and the fixed plate (3) are respectively arranged on the left side and the right side of the outer wall of the top of the base (1), a left mounting hole and a right mounting hole which are communicated are formed in the top of the outer wall of the right side of the fixed plate (3), a rotating rod (4) is mounted in an inner cavity of the mounting hole through a bearing, a rotating disc (8) and a transmission gear (5) are respectively arranged at the left end and the right end of the rotating rod (4) and extend to the two sides of the fixed plate (3), a motor (6) is arranged in the middle of the outer wall of the right side of the fixed plate (3), a gear (7) is mounted at the power end of the right side of the motor (6) through a speed reducer, the top of the gear (7) is meshed with the bottom of the transmission gear (5), a connecting column (9) is arranged at the center of the outer wall of the left side of the rotary table (8), three groups of electric push rods (10) are arranged at the annular array of one end, close to the rotary table (8), of the annular outer wall of the connecting column (9), three groups of sliding grooves (11) are arranged at the annular array of the outer side of the joint of the outer wall of the left side of the rotary table (8) and the connecting column (9), clamping blocks (12) are connected in the sliding grooves (11) in a sliding manner, the clamping blocks (12) are movably inserted into one end, far away from the connecting column (9), of the electric push rods (10), screw holes are formed in the outer wall of the left side of the clamping blocks (12), fixing rods (13) are arranged in the screw holes, and screw holes matched with the fixing rods (13) are formed in the outer wall of the electric push rods (10), the left side of the joint of the outer wall of the top of the base (1) and the pipe fitting auxiliary support piece (2) is provided with a screw hole which is communicated up and down, a thread adjusting rod (17) is arranged in the screw hole, the top of the thread adjusting rod (17) is provided with a pipe orifice shaping assembly (19) through a bearing, the left side and the right side of the joint of the outer wall of the bottom of the pipe orifice shaping assembly (19) and the thread adjusting rod (17) are both provided with a limiting rod (18), the bottom of the limiting rod (18) extends to the outer wall of the bottom of the base (1), the pipe orifice shaping assembly (19) comprises an installation frame (20) arranged at the top of the thread adjusting rod (17), the inner wall of the right side of the installation frame (20) is provided with a screw rod (21) through a bearing, the left end of the screw rod (21) extends to the outer wall of the left side of the installation frame (20) and is provided with a rocking handle, the joint of the outer wall of the left side of the screw rod (21) and the installation frame (20) is provided with a bearing, the inner wall of the bottom of the installation frame (20) is provided with a movable groove, the U-shaped movable seat (22) is slidably connected with a U-shaped movable seat (22), two sets of movable seat (22), the movable seat (22) are arranged on the two sets of the movable seat (22), and the movable seat (22) are arranged on the movable seat, and the movable seat (22) are arranged on the movable seat, two sets of the movable seat (22) are arranged on the movable seat (22) and matched with two sets of the movable groove on the movable seat (22) on the movable seat, rotating rod (24) are installed through the bearing in fly leaf (23) right-hand member face center, rotating rod (24) outer wall cover is equipped with compression roller (25), U type sliding seat (22) inner chamber is equipped with down compression roller (27), fly leaf (23) and U type sliding seat (22) left side outer wall middle part all are equipped with connecting block (28), top connecting block (28) bottom outer wall installs threaded rod (29) through the bearing, threaded rod (29) bottom extends to bottom connecting block (28) bottom outer wall and is equipped with the rocking handle, diagonal brace (26) are installed through the bearing in rotating rod (24) and the right side of last compression roller (25) junction, the top and fly leaf (23) right side outer wall top of diagonal brace (26) are connected.

2. The pipe orifice shaper of claim 1, wherein: the pipe fitting is assisted and is propped up piece (2) left side outer wall and be equipped with the passageway that link up about, pipe fitting is assisted and is propped up piece (2) top outer wall center activity and peg graft and have pull rod (37), pull rod (37) bottom extends to and is equipped with in the passageway and supports tight board (38), it evenly is equipped with supporting spring (31) to support tight board (38) top outer wall, supporting spring (31) top and passageway top inner wall connection, pipe fitting is assisted and is propped up piece (2) front and back both sides outer wall and all activity pegs graft and have inserted bar (33), and is two sets of the relative one end of inserted bar (33) extends to the passageway inner chamber and is equipped with supplementary tight piece (36), and is two sets of one back of body of inserted bar (33) is carried forward the back of the body and is extended to pipe fitting and is assisted and is propped up piece (2) outer wall and is equipped with stationary blade (35), the outside fixed mounting of stationary blade (35) and inserted bar (33) junction has spring (34), the other end and pipe fitting is assisted and is propped up piece (2) outer wall fixed connection, just spring (34) cover is established at inserted bar (33).

3. The pipe orifice shaper for pipe welding of claim 1, wherein: spliced pole (9) hoop outer wall is equipped with three mounting grooves of group (14) with the left side annular array of electric putter (10) junction, mounting groove (14) internalization is pegged graft and is had kicking block (16), three groups the relative one side outer wall of kicking block (16) is equipped with reset spring (15), reset spring (15)'s the other end and mounting groove (14) inner wall connection, just kicking block (16) longitudinal section is right trapezoid, kicking block (16) are close to the cross-sectional width of spliced pole (9) one side and are greater than the cross-sectional width of keeping away from spliced pole (9) one side, just kicking block (16) left side is the inclined plane.

4. The pipe orifice shaper for pipe welding of claim 2, wherein: the top of the joint of the outer wall of the left side of the pipe fitting auxiliary supporting piece (2) and the channel is movably inserted with a positioning rod (30), and the outer wall of the left side of the pull rod (37) is provided with a height adjusting hole matched with the positioning rod (30).

5. The pipe orifice shaper for pipe welding of claim 1, wherein: the left side of the joint of the outer wall of the top of the base (1) and the fixed plate (3) is provided with an auxiliary supporting block (39), the top of the auxiliary supporting block (39) is attached to the bottom of the rotary table (8), and the annular outer wall of the rotary table (8) is provided with an annular sliding groove matched with the auxiliary supporting block (39).

6. The pipe orifice shaper of claim 2, wherein: the outer wall of one side, the outer wall of the bottom of the abutting plate (38) and the inner wall of the bottom of the channel, which are opposite to the two groups of auxiliary clamping blocks (36), are uniformly provided with ball grooves, and balls (32) are arranged in the ball grooves.