CN113695433B

CN113695433B - Steel pipe forming equipment

Info

Publication number: CN113695433B
Application number: CN202110961613.1A
Authority: CN
Inventors: 史纪忠; 周德恒; 何叶磊
Original assignee: Hebei Dexu Welded Pipe Equipment Manufacturing Co ltd; Shijiazhuang Zhongtai Pipe Technology Development Co ltd
Current assignee: Hebei Dexu Welded Pipe Equipment Manufacturing Co ltd; Shijiazhuang Zhongtai Pipe Technology Development Co ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2023-06-20
Anticipated expiration: 2041-08-20
Also published as: CN113695433A

Abstract

The invention provides steel pipe forming equipment which comprises a frame, and a feeding unit, a rotary flat roller unit, an open-close flat roller unit, a bending-resistant unit, a rotary vertical roller unit, a first finish forming unit, a second finish forming unit and an output unit which are sequentially arranged on the frame along the conveying direction of a steel belt; the steel belt sequentially passes through the rotary flat roller unit, the open-close flat roller unit, the bending-resistant unit, the rotary vertical roller unit, the first fine forming unit and the second fine forming unit along the conveying direction after entering the equipment from the feeding unit, and is outwards fed out from the output unit after forming a pipe blank with a linear gap. The invention provides steel pipe forming equipment, which aims to realize the integrated production of steel pipes and improve the production efficiency of the steel pipes.

Description

Steel pipe forming equipment

Technical Field

The invention belongs to the technical field of steel pipe preparation, and particularly relates to steel pipe forming equipment.

Background

The steel pipe production process clamps the two sides of the steel belt through the roll shafts, the steel belt sequentially passes through a plurality of groups of roll shafts with different shapes and angles in the conveying process, so that the flat steel belt is gradually bent until an annular steel pipe blank is formed, and finally, the gaps of the steel pipe blank are fixedly connected through high-frequency welding, so that a finished steel pipe is formed. However, the existing steel pipe production equipment cannot complete the integrated production from steel belts to steel pipes, so that the production efficiency is low.

Disclosure of Invention

The invention aims to provide steel pipe forming equipment, which aims to realize the integrated production of steel pipes and improve the production efficiency of the steel pipes.

In order to achieve the above purpose, the invention adopts the following technical scheme: the steel pipe forming equipment comprises a frame, and a feeding unit, a rotary flat roller unit, an opening and closing flat roller unit, a bending-resistant unit, a rotary vertical roller unit, a first finish forming unit, a second finish forming unit and an output unit which are sequentially arranged on the frame along the conveying direction of a steel belt; the steel belt sequentially passes through the rotary flat roller unit, the open-close flat roller unit, the bending-resistant unit, the rotary vertical roller unit, the first fine forming unit and the second fine forming unit along the conveying direction after entering the equipment from the feeding unit, and is outwards sent out from the output unit after forming a tube blank with a linear gap.

In one possible implementation, the steel pipe forming apparatus further includes a vertical roll unit, a sizing unit, and a rough straightening unit disposed downstream of the output unit in a conveying direction.

In one possible implementation, the first finishing unit includes:

the first upper roller assembly is arranged on the frame by taking a first path as a rotation axis, the first path is perpendicular to the conveying direction and also perpendicular to the up-down direction, and is provided with a first positioning mechanism moving along the first path, and the first positioning mechanism is abutted with two side edges of an upper opening of the tube blank;

the first lower roller assembly is arranged on the frame by taking a second path as a rotation axis and is positioned below the first upper roller assembly, the second path is parallel to the first path, the first lower roller assembly is also in sliding fit with the frame along the up-down direction, and the first lower roller assembly is used for providing supporting force for the bottom of the tube blank; and

the first side roller assemblies are provided with two first side roller shafts, the two first side roller shafts are respectively arranged on the frame in a rotating mode by taking a third path as an axis, the third path is parallel to the upper and lower directions, the two first side roller shafts are symmetrically arranged by taking a conveying path as a symmetry axis, the two first side roller shafts are in sliding fit with the frame in the direction parallel to the first path, and the two first side roller shafts are used for applying extrusion force to two side surfaces of a tube blank.

In one possible implementation manner, the upper roller assembly includes a first upper roller shaft rotatably disposed on the frame with the first path as an axis, two ends of the first upper roller shaft are respectively provided with external threads with opposite rotation directions, and two first positioning mechanisms are respectively in threaded connection with two ends of the first upper roller shaft; the device also comprises two guide mechanisms which are respectively connected with the frame, wherein the guide mechanisms are used for limiting the first positioning mechanism to move in the axial direction of the first upper roll shaft.

In one possible implementation manner, the first finish forming unit further includes an oblique insert assembly, the oblique insert assembly includes two oblique insert rollers, the two oblique insert rollers are respectively rotatably disposed on the frame, the two oblique insert rollers are disposed on the frame along the mirror symmetry of the conveying path, and the two oblique insert rollers are disposed at an included angle, and the two oblique insert rollers are used for respectively providing support for two opposite sides of the outer peripheral surface of the tube blank.

In one possible implementation manner, the second finishing unit comprises two lining rollers respectively rotatably arranged on the frame, the two lining rollers are symmetrically arranged along the conveying path, the axis of each lining roller is perpendicular to the conveying path, and the lining rollers are used for being abutted against the inner surface of the tube blank.

In one possible implementation manner, the folding flat roller unit includes a plurality of groups of forming modules sequentially disposed on the frame along a conveying direction, and the forming modules include:

the second upper roller assembly is arranged on the frame by taking a fourth path as a rotation axis, the second upper roller assembly can slide on the frame along the up-down direction, the fourth path is perpendicular to the conveying direction and also perpendicular to the up-down direction, the second upper roller assembly is provided with a second positioning mechanism capable of moving along the fourth path, and the second positioning mechanism is abutted with two side edges of an upper opening of the tube blank;

the second lower roller assembly is arranged on the frame by taking a fifth path as a rotation axis and is positioned below the second upper roller assembly, the fifth path is parallel to the fourth path, the second lower roller assembly is also in sliding fit with the frame along the up-down direction, and the second lower roller assembly is used for providing supporting force for the bottom of the tube blank; and

the second side roller assemblies are provided with two second side roller shafts, the two second side roller shafts are respectively arranged on the frame in a rotating mode by taking a sixth path as an axis, the sixth path is parallel to the up-down direction, the two second side roller shafts are symmetrically arranged by taking a conveying path as a symmetrical axis, the two second side roller shafts are in sliding fit with the frame in the direction parallel to the fourth path, and the two second side roller shafts are used for applying extrusion force to two side surfaces of a tube blank.

In one possible implementation, the second lower roller assembly includes:

the second supporting frame is connected with the frame;

the second mounting frame is connected to the second supporting frame in a sliding manner along the up-down direction; and

the second lower roll shaft is rotationally connected with the second mounting frame by taking the fifth path as an axis.

In one possible implementation, the second upper roller assembly includes:

the two second connecting seats are respectively connected to the rack in a sliding manner along the up-down direction;

the two ends of the second upper roll shaft are respectively connected with the two second connecting seats, the second upper roll shaft is rotationally connected with the two second connecting seats by taking the fourth path as an axis, and the two second positioning mechanisms are respectively connected with the upper roll shaft; and

and the sixth driver is arranged on the frame, connected with one of the second connecting seats and used for driving the second connecting seats to slide along the up-down direction.

In one possible implementation, the second positioning mechanism includes:

the mounting seat is connected to the end part of the second upper roll shaft and is provided with a containing cavity with a downward opening; and

the positioning roller is rotationally arranged in the accommodating cavity by taking the fourth path as an axis, the positioning roller is partially positioned in the accommodating cavity, and the lower part of the positioning roller is used for being abutted with the side edge of the opening of the tube blank.

The steel pipe forming equipment provided by the invention has the beneficial effects that: compared with the prior art, the steel pipe forming equipment can straighten a whole roll of steel belt through the feeding unit and then feed the straightened steel belt into the rotary flat roller unit for preliminary processing, then the preliminarily formed pipe blank sequentially passes through the open-close flat roller unit, the bending-resistant unit, the rotary vertical roller unit, the first finish forming unit and the second finish forming unit to form the pipe blank with the linear gap, and finally the pipe blank is fed out from the output unit. The steel pipe forming equipment provided by the invention can realize the integrated processing from the steel belt to the formed pipe blank, does not need to manually transfer the pipe blank in the production process, improves the processing precision, realizes the automatic production of feeding, processing and outputting, and improves the production efficiency. In addition, the invention gradually completes the forming of the tube blank through a plurality of processing units, avoids the phenomena of tube blank cracking and the like in the processing process, and improves the qualification rate of products.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a steel pipe forming apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a first finishing unit according to an embodiment of the present invention;

FIG. 3 is a schematic view of the oblique insertion assembly of FIG. 2;

FIG. 4 is an enlarged view of a portion A of FIG. 3;

FIG. 5 is a schematic view of a first upper roll assembly for use in an embodiment of the present invention in contact with a tube blank;

FIG. 6 is a side view of a second finishing unit employed in an embodiment of the present invention;

FIG. 7 is a front view of a second finishing unit employed in an embodiment of the present invention;

FIG. 8 is an enlarged view of part B of FIG. 7;

FIG. 9 is a partial view of a liner tube in contact with a tube blank as used in an embodiment of the invention;

FIG. 10 is a schematic diagram of a folding flat roller unit according to an embodiment of the present invention;

FIG. 11 is a front view of a folding flat roller unit employed in an embodiment of the present invention;

FIG. 12 is a partial schematic view of a second upper roller assembly and a second side roller assembly employed in an embodiment of the present invention;

fig. 13 is a top view of a second upper roller assembly employed in an embodiment of the present invention.

In the figure: 1. a feeding unit; 2. a rotary flat roller unit; 3. an opening and closing flat roller unit; 301. a seventh driver; 302. a second upper roller shaft; 303. a second mounting base; 304. a positioning roller; 305. a second mounting frame; 306. a second lower roll shaft; 307. a fifth driver; 308. a second side roller; 309. a second support frame; 3010. a second connecting seat; 3011. a sixth driver; 4. a bending-resistant unit; 5. a rotary vertical roll unit; 6. a first finishing unit; 601. a first positioning mechanism; 602. a guide mechanism; 603. a first upper roller shaft; 604. a first side roller; 605. a first lower roll shaft; 605-1, roller sleeve; 606. a first connection base; 607. a first driver; 608. oblique inserting rollers; 609. a first support frame; 609-1, a first mount; 609-101, a second mount; 609-102, a first mount; 609-103, mounting blocks; 609-104, a first fixed block; 609-2, a support seat; 6010. a work table; 6011. a third driver; 6012. a fourth driver; 6013. a slide bar; 6014. a strip-shaped opening; 6015. an arc chute; 6016. a second driver; 7. a second finishing unit; 701. a lining roller; 702. a second fixed block; 703. a rotary gear; 8. an output unit; 9. a vertical roll unit; 10. sizing unit; 11. a rough straightening unit; 12. a frame; 13. a tube blank.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It should be noted that, the "rotation axis" refers to a rotation axis of the roller shaft, and does not refer to that the whole assembly is rotationally connected to the frame.

Referring to fig. 1, a steel pipe forming apparatus provided by the present invention will now be described. The steel pipe forming equipment comprises a frame 12, and a feeding unit 1, a rotary flat roller unit 2, an opening and closing flat roller unit 3, a bending unit 4, a rotary vertical roller unit 5, a first finish forming unit 6, a second finish forming unit 7 and an output unit 8 which are sequentially arranged on the frame 12 along the conveying direction of the steel belt; the steel strip sequentially passes through the rotary flat roller unit 2, the open-close flat roller unit 3, the bending-resistant unit 4, the rotary vertical roller unit 5, the first fine forming unit 6 and the second fine forming unit 7 along the conveying direction after entering the equipment from the feeding unit 1, and is outwards sent out from the output unit 8 after forming a pipe blank 13 with a linear gap.

Compared with the prior art, the steel pipe forming equipment provided by the invention has the advantages that a whole roll of steel belt can be straightened by the feeding unit 1 and then fed into the rotary flat roller unit 2 for preliminary processing, then the preliminary formed pipe blank 13 sequentially passes through the open-close flat roller unit 3, the bending-resistant unit 4, the rotary vertical roller unit 5, the first fine forming unit 6 and the second fine forming unit 7 to form the pipe blank 13 with a linear gap, and finally the pipe blank 13 is outwards fed out by the output unit 8. The steel pipe forming equipment provided by the invention can realize the integrated processing from the steel belt to the formed pipe blank 13, does not need to manually transfer the pipe blank 13 in the production process, improves the processing precision, realizes the automatic production of feeding, processing and outputting, and improves the production efficiency. In addition, the invention gradually completes the forming of the tube blank 13 through a plurality of processing units, avoids the phenomena of cracking of the tube blank 13 and the like in the processing process, and improves the qualification rate of products.

In some embodiments, referring to fig. 1, the steel pipe forming apparatus further includes a vertical roll unit 9, a sizing unit 10, and a rough straightening unit 11 disposed downstream of the output unit 8 in the conveying direction.

In this embodiment, after the pipe is sent out by the output unit 8, the outer peripheral surface of the pipe blank 13 is adjusted by the vertical roller unit 9, so that the outer peripheral surface of the pipe blank 13 forms a smooth arc surface, the outer diameter of the pipe blank 13 is further adjusted by the sizing unit 10, the outer diameter of the pipe blank 13 is ensured to be constant, and finally the straightness of the pipe blank 13 along the long axis direction is adjusted by the rough straightening unit 11. By adjusting the steps, the molding precision of the tube blank 13 is further improved, and the product quality is ensured.

In some embodiments, referring to fig. 2, the first finishing unit 6 includes a first upper roller assembly, a first lower roller assembly and a first side roller assembly, the first upper roller assembly is disposed on the frame 12 with a first path as a rotation axis, the first path is perpendicular to the conveying direction and also perpendicular to the up-down direction, the first upper roller assembly has a first positioning mechanism 601 moving along the first path, and the first positioning mechanism 601 abuts against two side edges of the upper opening of the tube blank 13; the first lower roller assembly is arranged on the frame 12 by taking the second path as a rotation axis and is positioned below the first upper roller assembly, the second path is parallel to the first path, the first lower roller assembly is also in sliding fit with the frame 12 along the up-down direction, and the first lower roller assembly is used for providing supporting force for the bottom of the tube blank 13; the first side roller assembly has two first side roller shafts 604, the two first side roller shafts 604 are all rotationally arranged on the frame 12 by taking a third path as an axis, the third path is parallel to the up-down direction, the two first side roller shafts 604 are symmetrically arranged by taking a conveying path as a symmetry axis, the two first side roller shafts 604 are also in sliding fit with the frame 12 in the direction parallel to the first path, and the two first side roller shafts 604 are used for applying extrusion force to two side surfaces of the tube blank 13.

The first positioning mechanism 601 of the first upper roller assembly can adjust the opening-closing distance according to the opening size required by the tube blank 13, and the opening of the tube blank 13 is gradually gathered in the forming process until being abutted with the first positioning mechanism 601, so that the opening size of the formed tube blank 13 is ensured to meet the requirement. The first lower roll assembly can support the bottom of the pipe blank 13, and meanwhile, the first lower roll assembly can move up and down according to the size of the processed pipe blank 13, so that the first lower roll assembly and the first upper roll assembly are matched to process the pipe blank 13 with different sizes. The two first side roller shafts 604 clamp the two sides of the tube blank 13 respectively, so that the two sides of the tube blank 13 form arc surfaces, and the distance between the two first side roller shafts 604 is adjusted according to the size requirement of the tube blank 13 to be processed, so as to be suitable for different size requirements of the tube blank 13. The device can adjust the interval between the first upper roller assembly and the first lower roller assembly according to production requirements, and can also adjust the interval between the two first side roller shafts 604, so that the outer peripheral surface of the tube blank 13 forms a smooth and round arc-shaped surface, and the first positioning mechanism 601 can axially slide along the self according to the opening requirements of the tube blank 13, thereby being applicable to different openings. The first upper roller assembly, the first lower roller assembly and the two first side roller shafts 604 can rotate, so that friction force applied to the tube blank 13 in the conveying process is reduced, and abrasion of the tube blank 13 is avoided. The structure can produce tube blanks 13 with different sizes without changing each part, reduces the production cost and can meet various production requirements

In some embodiments, referring to fig. 2, the first lower roller assembly includes two oppositely disposed first connecting seats 606, a first lower roller shaft 605 and a first driver 607, where the two first connecting seats 606 are respectively slidably disposed on the frame 12 along an up-down direction; the first lower roller 605 is arranged with the second path as an axis, and two ends of the first lower roller are respectively connected with the two first connecting seats 606 in a rotating way; the two first drivers 607 are both disposed on the frame 12, and the first drivers 607 are connected to the first connecting seat 606 for driving the first connecting seat 606 to move up and down.

The first driver 607 in this embodiment can drive the first lower roller shaft 605 to move up and down, so that the first connecting seat 606 slides up and down along the frame 12, and the interval between the first lower roller shaft 605 and the first upper roller assembly is adjusted to be suitable for tube blanks 13 with different sizes.

Alternatively, the first driver 607 is a cylinder, or a motor and a screw, and a nut on the screw is connected to the first lower roller shaft 605.

Optionally, a roller sleeve 605-1 is sleeved on the first lower roller shaft 605, and an arc-shaped forming surface is formed on the roller sleeve 605-1 and used for forming an arc-shaped surface on the bottom of the tube blank 13.

In some embodiments, referring to fig. 2 and fig. 5, the first upper roller assembly includes a first upper roller shaft 603 rotatably disposed on the frame 12 with a first path as an axis, two external threads with opposite rotation directions are respectively disposed at two ends of the first upper roller shaft 603, and two first positioning mechanisms 601 are respectively screwed at two ends of the first upper roller shaft 603; and two guide mechanisms 602 respectively connected to the frame 12, wherein the guide mechanisms 602 are used for limiting the movement of the first positioning mechanism 601 in the axial direction of the first upper roller shaft 603.

The two sides of the opening of the tube blank 13 are respectively abutted with two first positioning mechanisms 601 so as to ensure the opening size of the formed tube blank 13. The guide mechanism 602 guides the first positioning mechanism 601 from rotating when the first positioning mechanism 601 moves along the first path. The first upper roll shaft 603 is rotated to enable the two first positioning mechanisms 601 in threaded connection with the first upper roll shaft 603 to move in opposite directions along the first path, so that the distance between the two first positioning mechanisms 601 is adjusted to be suitable for different opening sizes of the tube blanks 13, the first upper roll assembly is not required to be replaced, the operation time is saved, and the production cost is reduced.

Alternatively, the present structure may rotate the first upper roller shaft 603 by a motor according to production requirements.

Optionally, the first positioning mechanism 601 includes a positioning seat sleeved outside the first upper roller shaft 603, a positioning part is circumferentially and annularly arranged on the positioning seat, the positioning part can be abutted with the side edge of the opening of the tube blank 13, and an internal thread is arranged on the positioning seat; the positioning seat is a cylindrical member, the positioning part is an annular positioning sheet, the positioning sheet is arranged at the opposite end of the positioning seat, and a step ring groove adjacent to the positioning sheet is formed at the opposite end of the positioning seat.

In some embodiments, referring to fig. 2 to 4, the first finishing unit 6 further includes an oblique insertion assembly, the oblique insertion assembly includes two oblique insertion rollers 608, the two oblique insertion rollers 608 are respectively rotatably disposed on the frame 12, the two oblique insertion rollers 608 are symmetrically disposed on the frame 12 along the conveying path in a mirror image manner, the two oblique insertion rollers 608 are disposed at an included angle, and the two oblique insertion rollers 608 are respectively used for providing support to opposite sides of the outer peripheral surface of the tube blank 13.

The contact blind points of the two oblique inserting rollers 608 on the first upper roller shaft 603, the first lower roller shaft 605 and the first side roller shaft 604 and the tube blank 13 provide supporting force for the outer peripheral surface of the tube blank 13, so that the defects that the support blind point area of the tube blank 13 is concave or convex due to extrusion molding in the molding process are avoided. The two oblique inserting rollers 608 respectively provide support for the two opposite sides of the tube blank 13, so that the surface of the tube blank 13 is uniformly stressed, and the formed tube blank 13 is prevented from reaching the ovality. The oblique insert roller 608 can rotate along with the conveying of the tube blank 13 so as to reduce friction force with the outer surface of the tube blank 13 and avoid abrasion of the tube blank 13. The device can ensure smooth and round surface of the tube blank 13 after being molded, and improves the product quality.

In some embodiments, referring to fig. 2 to 4, the oblique insertion roller 608 is disposed on the frame 12 through a connection mechanism, the connection mechanism includes a workbench 6010 and two first support frames 609 oppositely disposed on the workbench 6010, the two first support frames 609 are slidably disposed along a direction perpendicular to the conveying direction, and the two oblique insertion rollers 608 are respectively rotatably disposed on the two first support frames 609.

In this embodiment, two first support frames 609 slide along the direction perpendicular to the conveying direction, and the distance between two first support frames 609 can be adjusted, so that the supporting force can be provided for the pipe blanks 13 with different diameters, and when the diameter of the pipe blank 13 to be processed is changed, the whole device is not required to be replaced, so that the production cost is saved.

Optionally, a second driver 6016 is disposed on the working table 6010, where the second driver 6016 is connected to the first support frame 609 and can drive the first support frame 609 to slide.

Alternatively, the second driver 6016 may be a cylinder or a motor.

In some embodiments, referring to fig. 2 to 4, the first supporting frame 609 includes a supporting seat 609-2 and a first mounting seat 609-1, and the supporting seat 609-2 is slidably disposed on the frame 12 perpendicular to the conveying direction, so as to adjust the opening and closing distance between the two supporting seats 609-2; the first mounting seat 609-1 is slidably disposed on the supporting seat 609-2 along an up-down direction, and is used for adjusting the height of the first mounting seat 609-1, and the oblique insertion roller 608 is rotatably connected with the first mounting seat 609-1.

The supporting seats 609-2 can slide along the direction perpendicular to the conveying direction so as to adjust the opening and closing distance between the two supporting seats 609-2, the height of the first installation seat 609-1 can be adjusted, and when the size of the tube blank 13 changes, the supporting seats 609-2 and the first installation seat 609-1 are respectively adjusted so that the oblique inserting rollers 608 can provide supporting force for the tube blank 13, the adjusting range is enlarged, and the tube blank 13 with more sizes is suitable for. The oblique insert roller 608 is rotatably connected with the first mounting seat 609-1, in the tube blank 13 forming process, the formed tube blank 13 is continuously conveyed to the next station, meanwhile, the tube blank 13 of the previous station is conveyed, friction force between the oblique insert roller 608 and the tube blank 13 can be reduced through the rotary connection, and abrasion of the outer surface of the tube blank 13 is avoided.

Optionally, the first mounting seat 609-1 and the supporting seat 609-2 are respectively provided with a corresponding first mounting hole, and after the first mounting seat 609-1 is adjusted to a specified position, the corresponding first mounting holes can be connected and fixed through a threaded connector, so that the first mounting seat 609-1 is positioned.

In some embodiments, referring to fig. 2 to 4, the oblique insertion assembly further includes a third driver 6011 disposed on the supporting seat 609-2, and the third driver 6011 is connected to the first mounting seat 609-1 for driving the first mounting seat 609-1 to slide in an up-down direction.

The first mounting seat 609-1 is driven to slide through the third driver 6011, so that the first mounting seat 609-1 can be automatically adjusted without manual adjustment, the adjustment efficiency is improved, the adjustment precision can be increased, and the labor intensity of workers is reduced.

Optionally, the third driver 6011 includes a driving motor, a turbine, a worm, and a limiting seat, where the driving motor is disposed on the supporting seat 609-2; the turbine is connected with the output end of the motor; the worm is meshed with the turbine; the limit seat is fixed on the first mounting seat 609-1, and a spiral groove matched with the spiral tooth of the worm is formed in the inner annular surface of the limit seat.

The driving end of the driving motor enables the turbine to rotate, the worm meshed with the turbine rotates and the limiting seat moves in the up-down direction, so that the first mounting seat 609-1 is driven to move. The worm is connected with the first mounting seat 609-1 through the limiting seat, so that the first mounting seat 609-1 does not rotate along with the worm in the moving process, and the stability of the first mounting seat 609-1 is ensured.

In some embodiments, referring to fig. 2-4, a first mount 609-1 includes a first mount 609-102 slidably coupled to a support 609-2 and a second mount 609-101 rotatably coupled to the first mount 609-102, the second mount 609-101 being rotatable about an axis parallel to the conveying path, and a skewed roller 608 rotatably coupled to the second mount 609-101.

The second mounting member 609-101 can rotate in a plane perpendicular to the conveying plane, when producing tube blanks 13 with different sizes, different dies are usually adopted, contact blind points between the dies and the dies can be changed, and the rotating second mounting member 609-101 can enable the oblique inserting roller 608 to be suitable for different blind point areas, so that the application range of the device is enlarged.

In some embodiments, referring to fig. 2 to 4, the first mounting member 609-102 is provided with an arc chute 6015, and the second mounting member 609-101 is provided with an arc surface adapted to the arc chute 6015 so as to guide the rotation of the second mounting member 609-101.

The arcuate surface of the second mounting member 609-101 is capable of sliding within the arcuate chute 6015, enabling rotation of the second mounting member 609-101 about an axis parallel to the conveying path while providing guidance for rotation of the second mounting member 609-101 against shifting from the predetermined path. This simple structure has simplified connection structure and adapting unit, and it is convenient to adjust, has improved angle regulation's efficiency.

In some embodiments, referring to fig. 2 to 4, a strip-shaped opening 6014 is formed in the arc-shaped chute 6015 along the rotation direction of the second mounting member 609-101, a sliding strip 6013 capable of being slidably inserted into the strip-shaped opening 6014 is disposed on the second mounting member 609-101, a fourth driver 6012 is further disposed on the support seat 609-2, and a driving end of the fourth driver 6012 is connected to the sliding strip 6013 for driving the sliding strip 6013 to slide along the strip-shaped opening 6014.

The slide bar 6013 is capable of sliding along the arc-shaped slide groove 6015 in the bar-shaped opening 6014, and the slide bar 6013 is driven to slide by the fourth driver 6012, so that the second mounting pieces 609-101 rotate around the axis parallel to the conveying path to adjust the angle between the two second mounting pieces 609-101, and the two oblique insertion rollers 608 can provide support for the tube blanks 13 of different sizes.

Optionally, the fourth driver 6012 is an air cylinder, and the driving end of the air cylinder is hinged to the sliding strip 6013, so that the sliding strip 6013 can slide along the strip-shaped opening 6014 when the driving end stretches.

In some embodiments, not shown in the drawings, the sliding strip 6013 is provided with a latch, and the driving end of the fourth driver 6012 is connected with a gear capable of meshing with the latch.

The fourth driver 6012 drives the gear to rotate so that the slide bar 6013 engaged therewith rotates to realize the sliding of the slide bar 6013 along the arc-shaped slide groove 6015. The sliding bar 6013 is driven to rotate in a gear meshing mode, so that the position of the sliding bar 6013 can be accurately adjusted, the sliding bar 6013 is positioned at a designated position and is more stable and not easy to move, and the phenomenon that the inclined inserting roller 608 supports the tube blank 13 due to movement of the sliding bar 6013 in work is avoided.

In some embodiments, referring to fig. 2 to 4, the second mounting member 609-101 includes a first fixing block 609-104 and two mounting blocks 609-103 disposed opposite to the first fixing block 609-104, a mounting space for mounting the oblique insertion roller 608 is formed between the two mounting blocks 609-103, the first fixing block 609-104 is connected with the supporting seat 609-2, and two ends of the oblique insertion roller 608 are respectively connected with the two mounting blocks 609-103 in a rotating manner.

The oblique insertion roller 608 is disposed in the installation space, the first fixing blocks 609-104 are not affected when the oblique insertion roller 608 rotates, and the oblique insertion roller 608 can slide along with the first fixing blocks 609-104 when the first fixing blocks 609-104 slide along the sliding grooves, so that the angle of the oblique insertion roller 608 is adjusted. The device adopts a simple structure to realize the adjustment of the angle of the oblique inserting roller 608, and meanwhile, the connection relation between the oblique inserting roller 608 and the mounting blocks 609-103 is not influenced.

Optionally, bearings are respectively disposed at two ends of the oblique insertion roller 608, and the mounting blocks 609-103 are connected with the bearings through bearing blocks, so that the mounting blocks 609-103 are not affected while the oblique insertion roller 608 rotates.

In some embodiments, referring to fig. 6 to 9, the second finishing unit 7 includes two lining rollers 701 rotatably disposed on the frame 12, the two lining rollers 701 are symmetrically disposed along the conveying path, the axis of the lining rollers 701 is perpendicular to the conveying path, and the lining rollers 701 are used to abut against the inner surface of the tube blank 13.

The two lining rollers 701 are respectively connected with the frame 12, the two lining rollers 701 are symmetrically arranged to respectively apply pressing force to two opposite sides of the inner wall of the tube blank 13, support is provided for a blind spot area where the tube blank 13 is contacted with a die, collapse of the blind spot area where the tube blank 13 is contacted with the die due to extrusion is avoided, and the qualification rate of the formed tube blank 13 is improved.

In some embodiments, referring to fig. 6 to 9, the second finishing unit 7 further includes two connection assemblies rotatably connected to the frame 12 and respectively rotatably connected to the two lining rollers 701, and the connection assemblies can drive the lining rollers 701 to rotate around an axis parallel to the conveying path;

the connecting assembly rotates around the axis parallel to the conveying path, so that the lining rollers 701 synchronously rotate along with the connecting assembly, and the included angle between the two lining rollers 701 can be adjusted, so that the connecting assembly is suitable for tube blanks 13 in different sizes and different blind spot areas, the application range is enlarged, the lining rollers 701 do not need to be replaced when the tube blanks 13 in different sizes are produced, and the production cost is reduced.

In some embodiments, referring to fig. 6 to 9, the connection assembly includes a rotation gear 703 and a second fixed block 702, the rotation gear 703 is rotatably connected to the frame 12; the second fixed block 702 is fixedly connected to the rotary gear 703, and the lining roller 701 is rotatably connected to the second fixed block 702; in which rotating gears 703 on two coupling members are meshed.

The rotating gears 703 on the two connecting assemblies are meshed, when one rotating gear 703 rotates, the other rotating gear 703 synchronously rotates, so that the rotation angles of the two rotating gears 703 are consistent, the two lining rollers 701 are guaranteed to be arranged symmetrically all the time, and the adjustment precision is improved. Connecting the lining roller 701 with the rotating gear 703 through the second fixing block 702 improves the stability of the installation of the lining roller 701.

Alternatively, one of the rotation gears 703 is connected to a motor, and the rotation gear 703 is driven to rotate by the motor.

In some embodiments, referring to fig. 10 to 13, the open-close flat roller unit 3 includes a multi-component module sequentially disposed on the frame 12 along a conveying direction, the forming module includes a second upper roller assembly, a second lower roller assembly and a second side roller assembly, the second upper roller assembly is disposed on the frame 12 with a fourth path as a rotation axis, the second upper roller assembly can slide on the frame 12 along an up-down direction, the fourth path is perpendicular to the conveying direction and also perpendicular to the up-down direction, the second upper roller assembly has a second positioning mechanism capable of moving along the fourth path, and the second positioning mechanism is abutted with two side edges of the upper opening of the tube blank 13; the second lower roller assembly is arranged on the frame 12 by taking the fifth path as a rotation axis and is positioned below the second upper roller assembly, the fifth path is parallel to the fourth path, the second lower roller assembly is also in sliding fit with the frame 12 along the up-down direction, and the second lower roller assembly is used for providing supporting force for the bottom of the tube blank 13; the second side roller assembly has two second side roller shafts 308, the two second side roller shafts 308 are all rotationally arranged on the frame 12 by taking a sixth path as an axis, the sixth path is parallel to the up-down direction, the two second side roller shafts 308 are symmetrically arranged by taking a conveying path as a symmetry axis, the two second side roller shafts 308 are also in sliding fit with the frame 12 in a direction parallel to the fourth path, and the two second side roller shafts 308 are used for applying extrusion force to two side surfaces of the tube blank 13.

The second positioning mechanism of the second upper roller assembly can adjust the opening-closing distance according to the opening size required by the tube blank 13, and the opening of the tube blank 13 is gradually gathered in the forming process until the tube blank 13 is abutted with the second positioning mechanism, so that the opening size of the formed tube blank 13 is ensured to meet the requirement. The second lower roll assembly can support the bottom of the pipe blank 13, and meanwhile, the second upper roll assembly and the second lower roll assembly can move up and down according to the size of the processed pipe blank 13, so that the pipe blank 13 with different sizes is processed. The two second side roller shafts 308 respectively clamp the two sides of the tube blank 13 so that the two sides of the tube blank 13 form arc surfaces, and the distance between the two second side roller shafts 308 is adjusted according to the size requirement of the tube blank 13 to be processed so as to be suitable for different size requirements of the tube blank 13. The device can adjust the interval between the second upper roller assembly and the second lower roller assembly according to production requirements, and can also adjust the interval between the two second side roller shafts 308, so that the outer peripheral surface of the tube blank 13 forms a smooth and round arc surface, and the second positioning mechanism can axially slide along the second positioning mechanism according to the opening requirements of the tube blank 13, thereby being applicable to different openings. The structure can produce tube blanks 13 with different sizes without replacing various parts, reduces the production cost and can meet various production requirements.

In some embodiments, referring to fig. 10 to 13, the second lower roller assembly includes a second support bracket 309, a second mounting bracket 305, and a second lower roller shaft 306, the second support bracket 309 being connected to the frame 12; the second mounting frame 305 is slidably connected to the second supporting frame 309 along the up-down direction; the second lower roller shaft 306 is rotatably connected to the second mounting frame 305 with the fifth path as an axis.

In this embodiment, the second lower roller shaft 306 and the second upper roller assembly can respectively clamp and position the upper side and the lower side of the tube blank 13, so that the tube blank 13 forms an arc surface, the second lower roller shaft 306 is rotationally connected to the second mounting frame 305, friction force on the tube blank 13 can be reduced in the conveying process of the tube blank 13, and abrasion of the tube blank 13 is avoided. The second mounting frame 305 is slidably connected to the support frame along the up-down direction, and the height of the second lower roll shaft 306 can be adjusted, so that the distance between the second upper roll assembly and the second lower roll shaft 306 is adjusted according to the tube blanks 13 with different sizes, the second lower roll shaft 306 is not required to be replaced when the tube blanks 13 with different sizes are processed, and the production cost is reduced.

In some embodiments, referring to fig. 10 to 11, the second lower roller assembly further includes a fifth driver 307 disposed on the second supporting frame 309, where the fifth driver 307 is connected to the second mounting frame 305 for driving the second mounting frame 305 to slide.

The fifth driver 307 can drive the second mounting frame 305 to slide along the up-down direction, so that manual adjustment is not needed, and the labor consumed for adjusting the second mounting frame 305 is reduced.

Optionally, the fifth driver 307 is a cylinder.

Optionally, the fifth driver 307 includes a driving motor, a turbine, a worm, and a limiting seat, where the driving motor is disposed on the second supporting frame 309; the turbine is sleeved at the output end of the driving motor; the worm is meshed with the turbine and is rotationally connected to the frame 12; the limiting seat is fixed on the second mounting frame 305, and a spiral groove matched with the spiral tooth of the worm is formed in the inner annular surface of the limiting seat.

In some embodiments, referring to fig. 10 to 13, the second upper roller assembly includes two second connection seats 3010, a second upper roller shaft 302 and a sixth driver 3011, where the two second connection seats 3010 are slidably connected to the frame 12 along an up-down direction respectively; two ends of the second upper roll shaft 302 are respectively connected with two second connecting seats 3010, the second upper roll shaft 302 is rotationally connected to the two second connecting seats 3010 by taking a fourth path as an axis, and two second positioning mechanisms are respectively connected to the second upper roll shaft 302; the sixth driver 3011 is disposed on the frame 12 and connected to one of the second connection blocks 3010 for driving the second connection block 3010 to slide in an up-down direction.

The sixth driver 3011 drives the second connecting base 3010 to slide in the up-down direction, thereby adjusting the height of the second upper roller shaft 302 to meet the production process of the different-sized tube blanks 13. By providing one sixth driver 3011 to drive one of the second connection blocks 3010 to slide, because both the second connection blocks 3010 are connected to the second upper roller 302, the other second connection block 3010 slides synchronously, and the axis of the second upper roller 302 is ensured to be always arranged along the second path, compared with the case that two sixth drivers 3011 are adopted to drive two second connection blocks 3010 respectively, the energy consumption is reduced.

Optionally, the sixth driver 3011 includes a motor and a screw, and a nut on the screw is connected to the second connection base 3010, and the motor drives the screw of the screw to rotate, so that the thread moves up and down along the screw.

In some embodiments, referring to fig. 10 to 13, the second positioning mechanism includes a second mounting seat 303 and a positioning roller 304, where the second mounting seat 303 is connected to an end of the second upper roller shaft 302, and has a receiving cavity with a downward opening; the positioning roller 304 is rotatably disposed in the accommodating chamber with the fourth path as an axis, a portion of the positioning roller 304 is disposed in the accommodating chamber, and a lower portion of the positioning roller 304 is adapted to abut against an opening side edge of the tube blank 13.

The positioning roller 304 is partially positioned in the accommodating cavity, and when friction force between the positioning roller 304 and the tube blank 13 generates a large amount of heat, the accommodating cavity is favorable for heat dissipation. Meanwhile, the two ends of the positioning roller 304 are respectively connected with the inner wall of the accommodating cavity, so that the positioning roller 304 can be protected from being influenced or damaged by external environment, and the service life of the positioning roller 304 is prolonged.

In some embodiments, not shown in the drawings, two ends of the positioning roller 304 are respectively rotatably connected with a sliding seat, the sliding seat is slidably disposed in the accommodating cavity along the up-down direction, and the sliding seat is connected with the seventh driver 301, and the seventh driver 301 is disposed on the frame 12 and is used for driving the sliding seat to slide along the up-down direction.

The seventh driver 301 drives the positioning rollers 304 to slide in the accommodating cavity along the vertical direction, so that the height of each positioning roller 304 can be independently adjusted, the adjusting range is enlarged, the adjusting precision of the positioning rollers 304 can be improved, the positioning rollers 304 can be replaced to position and abut against the opening of the pipe blank 13, and the product processing precision is ensured.

Alternatively, the seventh driver 301 may be a cylinder or a motor, and when the seventh driver 301 is a motor, a screw structure is further included for connecting the slide holder and the motor.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The steel pipe forming equipment is characterized by comprising a frame, and a feeding unit, a rotary flat roller unit, an opening and closing flat roller unit, a bending-resistant unit, a rotary vertical roller unit, a first finish forming unit, a second finish forming unit and an output unit which are sequentially arranged on the frame along the conveying direction of a steel belt; the steel strip sequentially passes through the rotary flat roller unit, the open-close flat roller unit, the bending-resistant unit, the rotary vertical roller unit, the first fine forming unit and the second fine forming unit along the conveying direction after entering the equipment from the feeding unit, and is outwards sent out from the output unit after forming a tube blank with a linear gap;

the first finishing unit includes:

the first side roller assemblies are provided with two first side roller shafts, the two first side roller shafts are respectively arranged on the frame in a rotating mode by taking a third path as an axis, the third path is parallel to the up-down direction, the two first side roller shafts are symmetrically arranged by taking a conveying path as a symmetry axis, the two first side roller shafts are in sliding fit with the frame in the direction parallel to the first path, and the two first side roller shafts are used for applying extrusion force to two side surfaces of a tube blank;

the first finish forming unit further comprises an oblique inserting assembly, the oblique inserting assembly comprises two oblique inserting rollers, the two oblique inserting rollers are respectively and rotatably arranged on the frame, the two oblique inserting rollers are symmetrically arranged on the frame along a conveying path in a mirror image mode, the two oblique inserting rollers are arranged in an included angle mode, and the two oblique inserting rollers are used for respectively supporting two opposite sides of the outer peripheral surface of the tube blank;

the oblique inserting roller is arranged on the frame through a connecting mechanism, the connecting mechanism comprises a workbench and two first supporting frames which are oppositely arranged on the workbench, and the two first supporting frames are arranged in a sliding manner along the direction perpendicular to the conveying direction;

the first support frame comprises a support seat and a first installation seat, and the support seat is arranged on the frame in a sliding manner along the direction perpendicular to the conveying direction and is used for adjusting the opening and closing distance between the two support seats; the first mounting seat is arranged on the supporting seat in a sliding manner along the up-down direction and is used for adjusting the height of the first mounting seat, the first mounting seat comprises a first mounting piece in sliding connection with the supporting seat and a second mounting piece in rotating connection with the first mounting piece, the second mounting piece can rotate around an axis parallel to a conveying path, and the oblique inserting roller is in rotating connection with the second mounting piece.

2. The steel pipe forming apparatus according to claim 1, further comprising a vertical roll unit, a sizing unit, and a rough straightening unit provided downstream of the output unit in a conveying direction.

3. The steel pipe forming device as claimed in claim 1, wherein the first upper roller assembly comprises a first upper roller shaft rotatably arranged on the frame with the first path as an axis, two ends of the first upper roller shaft are respectively provided with external threads with opposite rotation directions, and two first positioning mechanisms are respectively connected with two ends of the first upper roller shaft in a threaded manner; the device also comprises two guide mechanisms which are respectively connected with the frame, wherein the guide mechanisms are used for limiting the first positioning mechanism to move in the axial direction of the first upper roll shaft.

4. The steel pipe forming apparatus as claimed in claim 1, wherein the second finishing unit comprises two lining rollers rotatably provided to the frame, respectively, the two lining rollers being symmetrically disposed along the conveying path, an axis of the lining rollers being perpendicular to the conveying path, the lining rollers being adapted to abut against an inner surface of the pipe blank.

5. The steel pipe forming apparatus as claimed in claim 1, wherein the open-close flat roller unit includes a plurality of sets of forming modules provided in the frame in order along a conveying direction, the forming modules including:

6. The steel tube forming apparatus as claimed in claim 5, wherein the second lower roller assembly comprises:

the second supporting frame is connected with the frame;

7. The steel tube forming apparatus as claimed in claim 5, wherein the second upper roller assembly comprises:

the two ends of the second upper roll shaft are respectively connected with the two second connecting seats, the second upper roll shaft is rotationally connected with the two second connecting seats by taking the fourth path as an axis, and the two second positioning mechanisms are respectively connected with the second upper roll shaft; and

8. The steel pipe forming apparatus as claimed in claim 7, wherein the second positioning mechanism comprises: