[go: up one dir, main page]

CN216138613U - Large-section I-shaped steel beam unit manufacturing line - Google Patents

Large-section I-shaped steel beam unit manufacturing line Download PDF

Info

Publication number
CN216138613U
CN216138613U CN202122184257.5U CN202122184257U CN216138613U CN 216138613 U CN216138613 U CN 216138613U CN 202122184257 U CN202122184257 U CN 202122184257U CN 216138613 U CN216138613 U CN 216138613U
Authority
CN
China
Prior art keywords
machine
assembly line
section
transmission roller
degree
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202122184257.5U
Other languages
Chinese (zh)
Inventor
陆安伟
李凯东
张丽萍
仇应强
钦朱杰
谢振宇
李单勇
宁捷
柴文广
姜运程
张怡凡
刘潇康
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jinzhu Transportation Construction Co Ltd
Original Assignee
Zhejiang Jinzhu Transportation Construction Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Jinzhu Transportation Construction Co Ltd filed Critical Zhejiang Jinzhu Transportation Construction Co Ltd
Priority to CN202122184257.5U priority Critical patent/CN216138613U/en
Application granted granted Critical
Publication of CN216138613U publication Critical patent/CN216138613U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The utility model provides a large-section I-shaped steel beam unit manufacturing assembly line which comprises an assembling assembly line, a welding assembly line and a correcting assembly line; the assembling production line comprises a transmission roller production line, a 180-degree mobile turnover machine, an assembling machine and a mobile steel plate hoisting machine, wherein the assembling machine is connected with the transmission roller production line and arranged above the transmission roller production line; the welding assembly line comprises a transmission roller assembly line, a 180-degree movable turnover machine, a 45-degree turnover machine and a cantilever type automatic submerged arc welding machine, wherein the 45-degree turnover machine is arranged on two sides of the transmission roller assembly line, the 180-degree movable turnover machine and the transmission roller assembly line are arranged in an orthogonal mode, and the cantilever type automatic submerged arc welding machine is arranged on the outer side of the 45-degree turnover machine; the large-section I-shaped steel beam unit manufacturing line has the functions of automatic positioning, automatic assembly, automatic welding, automatic correction and the like.

Description

Large-section I-shaped steel beam unit manufacturing line
Technical Field
The utility model relates to the technical field of steel beam manufacturing construction, in particular to a large-section I-shaped steel beam unit manufacturing production line.
Background
With the rapid development of economy in China, the transportation industry also obtains wide development space, the construction range and the investment cost of bridge projects are further enlarged, and bridge construction materials are changed from traditional concrete bridges to steel structure bridges. In order to widely popularize steel structure bridges, the transportation department issues: the guidance on the propulsion of steel structure bridges for highways (cross road issue No. 2016,115) by the department of transportation is about the steel structure bridges to become one of the main bridge types for future bridge construction, and the steel structure bridges are also the bridge types most suitable for large-scale industrial construction. The I-shaped steel plate composite beam has the advantages of simple section, convenience in manufacturing and installation, high bearing capacity and the like, and is widely applied to the construction of expressway bridges, urban viaducts and large bridge approach bridges in recent years.
In the manufacturing process of the I-shaped steel plate composite beam, the following technical problems are also existed in the large-section I-shaped steel beam except that the problems of low mechanization degree, large personnel investment, low processing precision of components, poor welding quality, long manufacturing period and the like generally existing in the processing and manufacturing of steel structures: the automatic assembly welding method comprises the steps of firstly, automatically assembling and welding different plate thicknesses, secondly, automatically assembling precision and stability of the ultrahigh web, and thirdly, automatically welding the submerged arc welding. Therefore, how to solve the problems existing in the process of processing and manufacturing the I-shaped steel beam, the manufacturing precision of the I-shaped steel beam is improved, and the construction quality of the bridge is directly related.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a large-section I-shaped steel beam unit manufacturing production line which improves the manufacturing precision of I-shaped steel beams and increases the bridge construction quality.
In order to solve the technical problem, the utility model provides a large-section I-shaped steel beam unit manufacturing assembly line which comprises an assembling assembly line, a welding assembly line and a correcting assembly line; the assembling production line comprises a transmission roller production line, a 180-degree movable turnover machine, an assembling machine and a movable steel plate hoisting machine, wherein the transmission roller production line, the 180-degree movable turnover machine, the assembling machine and the movable steel plate hoisting machine are arranged in the assembling production line, the assembling machine is connected with the transmission roller production line in the assembling production line and is arranged above the transmission roller production line in the assembling production line, the movable steel plate hoisting machine is arranged above the transmission roller production line in the assembling production line, and the 180-degree movable turnover machine and the transmission roller production line in the assembling production line are arranged in an orthogonal mode.
The utility model has the following characteristics and beneficial effects:
1. compared with the prior art, the I-shaped steel beam unit manufacturing assembly line adopted in the utility model has the characteristics of digitalization, intellectualization, automation, high adaptability, high stability and high safety, the production efficiency and the manufacturing quality are greatly improved, the main structure realizes the automation of positioning, assembling, welding and correcting, and the technical benefit advantage is obvious.
2. The combined 180-degree movable turnover machine adopted by the utility model has the advantages of reasonable structure, simple operation, capability of realizing 90-degree and 180-degree nondestructive turnover of the I-shaped steel beam unit, flexibility, maneuverability, great improvement on the operation efficiency and obvious technical benefit advantage.
3. The 45-degree turnover machine and the welding section conveying roller are perfectly matched, so that the transmission operation and the welding operation are not influenced mutually, and meanwhile, the 45-degree turnover machine is matched with a cantilever type automatic submerged arc welding machine to realize automatic turnover welding.
4. The driving roller unit adopted by the utility model is provided with the balance adjusting device, so that the problems of uneven field and the like are well solved, and the smoothness of the whole driving roller assembly line is ensured.
Drawings
FIG. 1 is a schematic layout of a large section I-beam unit manufacturing line;
FIG. 2 is a flow chart of a process line for manufacturing a large-section I-beam unit;
FIG. 3 is a perspective view of the driving roller unit;
FIG. 4 is a schematic diagram of an assembly pipeline;
FIG. 5 is a left side view of FIG. 4;
FIG. 6 is a schematic view of a moving steel plate hoist;
FIG. 7 is a side view of the moving steel plate hoist;
FIG. 8 is a perspective view of a welding segment transfer roll;
FIG. 9 is a schematic layout of a 45 ° tipper;
FIG. 10 is a schematic illustration of the turn-over operation of the 45 ° turner;
FIG. 11 is a schematic view of a 90 ° mobile upender;
FIG. 12 is a schematic layout of a 90 ° mobile upender;
fig. 13 is a schematic view of the step of 180 ° turn-over of the large section i-section steel beam unit.
Wherein: 1-transmission roller assembly line; 2-180 degree mobile turnover machine; 3-I-shaped steel beam unit; 4-assembling machine; 5-45 degree turning machine; 6-cantilever type automatic submerged arc welding machine; 7-hydraulic straightening machine; 8-longitudinal beam; 9-a roller; 10-a support leg; 11-balance adjustment means; 12-a recess; 13-electric hoist; 14-main beam; 15-the stent; 16-non-invasive clamp; 17-slide rail; 18-rail clamping device; 19-ground; 20-L-shaped roll-over stand; 21-hinge bolt; 22-hydraulic base; 23-welding section transfer roller; 24-moving steel plate hoisting machine; 25-driving roller unit; 26-90 degree mobile turnover machine; 27-a torsion machine; 28-axis of rotation; 29-flip arm two; 30-turning over the arm one; 31-transverse traveling mechanism.
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 that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
The technical solution of the present invention is further explained with reference to fig. 1 to 13.
The utility model provides a large-section I-shaped steel beam unit manufacturing assembly line which comprises an assembling assembly line, a welding assembly line and a correcting assembly line; the assembling production line comprises a transmission roller production line 1, a 180-degree mobile turnover machine 2, an assembling machine 4 and a mobile steel plate hoisting machine 24, wherein the transmission roller production line 1, the 180-degree mobile turnover machine 2 and the mobile steel plate hoisting machine 24 are arranged in the assembling production line, the assembling machine 4 is connected with the transmission roller production line 1 in the assembling production line and is arranged above the transmission roller production line 1 in the assembling production line, the mobile steel plate hoisting machine 24 is arranged above the transmission roller production line 1 in the assembling production line, and the 180-degree mobile turnover machine 2 in the assembling production line is arranged in an orthogonal mode with the transmission roller production line 1; the welding assembly line comprises a transmission roller assembly line 1, a 180-degree movable turnover machine 2, a 45-degree turnover machine 5 and a cantilever type automatic submerged arc welding machine 6 in the welding assembly line, wherein the 45-degree turnover machine 5 is arranged on two sides of the transmission roller assembly line 1 in the welding assembly line, the 180-degree movable turnover machine 2 in the welding assembly line is orthogonally arranged with the transmission roller assembly line 1, and the cantilever type automatic submerged arc welding machine 6 is arranged on the outer side of the 45-degree turnover machine 5; the correcting assembly line comprises a transmission roller assembly line 1, a 180-degree movable turnover machine 2 and a hydraulic correcting machine 7 in the correcting assembly line, wherein the 180-degree movable turnover machine 2 in the correcting assembly line is orthogonally arranged with the transmission roller assembly line 1, and the hydraulic correcting machine 7 is arranged on two sides of the transmission roller assembly line 1 in the correcting assembly line.
Wherein, the assembly line, the welding assembly line and the drive roller assembly line 1 in the correction assembly line jointly form a complete drive roller assembly line 1.
The transmission roller assembly line 1 is composed of transmission roller units 25 and welding section transmission rollers 23, the transmission roller units 25 are arranged at intervals, each transmission roller unit 25 comprises a longitudinal beam 8, a rolling shaft 9, a support leg 10 and a balance adjusting device 11, the support leg 10 is arranged below the longitudinal beam 8, the balance adjusting device 11 is arranged in the middle of the support leg 10, and the rolling shaft 9 is arranged between the longitudinal beams 8; the welding section conveying roller 23 comprises longitudinal beams 8, rolling shafts 9, supporting legs 10, balance adjusting devices 11 and notches 12, the supporting legs 10 are arranged below the longitudinal beams 8, the balance adjusting devices 11 are arranged in the middle of the supporting legs 10, the rolling shafts 9 are arranged between the longitudinal beams 8, and the notches 12 are asymmetrically arranged on the longitudinal beams 8 on two sides.
Specifically, the transmission roller units 25 are arranged at intervals, 180-degree movable tilters 2 can be inserted into the intervals, at least two longitudinal beams 8 are arranged and located on two sides of a rolling shaft 9 respectively, the rolling shaft 9 can rotate relative to the longitudinal beams 8, and the I-shaped steel beam units 3 are conveyed in the rotating process of the rolling shaft 9; in the transportation process, because the part of the field has the condition of not being stable enough, a balance adjusting device 11 is arranged in the middle of the supporting legs 10 and used for adaptively adjusting the height of the supporting legs 10, and when the field is not flat, an operator changes the height of each supporting leg 10 through the balance adjusting device 11 so as to ensure that the longitudinal beams 8 on the upper parts of the supporting legs 10 can maintain a stable state.
In addition, the installation positions of the longitudinal beam 8, the roller 9, the support leg 10 and the balance adjusting device 11 in the welding section conveying roller 23 are the same as those of the driving roller unit 25, and the notch 12 is asymmetrically arranged, so that after the 45-degree turnover machine 5 is installed in the notch 12, the 45-degree turnover machines 5 on two sides cannot interfere, and the use stability of the 45-degree turnover machine 5 is maintained.
Remove steel sheet hoisting machine 24 constitute by two upset gallows at least, the upset gallows includes electric block 13, girder 14, support 15, does not have and hinders clamp 16, slide rail 17 and clamping rail ware 18, slide rail 17 sets up on the ground 19 of 1 both sides of driving roller assembly line, support 15 bottom is equipped with clamping rail ware 18, sets up on slide rail 17, support 15 top is equipped with girder 14, be equipped with two at least electric block 13 on the girder 14, electric block 13 passes through the rope and connects and does not hinder clamp 16.
Specifically, the support 15 moves along the slide rail 17 through the rail clamping device 18 to finish the action of hoisting and conveying the steel plate to the transmission roller assembly line 1, in the hoisting and conveying process, the outer side of the steel plate is clamped through the damage-free clamp 16 to be fixed, the steel plate is controlled to ascend and descend by pulling or loosening the rope, the steel plate is driven to ascend, hoist and lower in the conveying process by matching with the movement of the support 15, and the electric hoist 13 can move relative to the main beam 14 to adjust the distance between the electric hoists 13.
When the steel plate is processed, a numerical control cutting machine is used for accurately cutting and blanking the steel plate parts, a chamfering machine is used for polishing and accurately trimming cuts, and a beveling machine and an edge milling machine are used for processing welded edges needing to be processed or plates with high precision requirements.
Then hoisting the processed steel plate to a transmission roller assembly line 1 in an assembly line by using a movable steel plate hoisting machine 24, positioning the lower wing plate on an I-shaped rod assembly machine, then positioning the web plate, and then turning over the assembled T-shaped assembly by using a 180-degree movable turnover machine 2 and positioning the T-shaped assembly to the lower wing plate; and (3) conveying the assembled I-shaped steel beam unit (3) to a welding production line, and performing welding line operation on the I-shaped steel beam unit (3) by using a 45-degree turnover machine (5).
The 45-degree turnover machine 5 is composed of an L-shaped turnover frame 20 and a hydraulic base 22, the L-shaped turnover frame 20 is connected with the hydraulic base 22 through a hinge bolt 21, and when the L-shaped turnover frame 20 rotates relative to the hydraulic base 22, the L-shaped turnover frame 20 rotates along the axis of the hinge bolt 21.
The 180-degree movable turnover machine 2 is formed by at least mutually matching and turning two 90-degree movable turnover machines 26, each 90-degree movable turnover machine 26 comprises a first turnover arm 30, a second turnover arm 29, a rotating shaft 28, a twisting machine 27 and a transverse travelling mechanism 31, each first turnover arm 30 and each second turnover arm 29 form a 90-degree included angle, the length is H, the thickness is delta, the height of the large-section I-shaped steel beam unit 3 is recorded as a, the width is recorded as H, a + delta is more than H and less than a +2 delta, the first turnover arm 30 and the second turnover arms 29 are connected into a whole through the rotating shaft 28, the twisting machines 27 are installed at two ends of the rotating shaft 28, the transverse travelling mechanisms 31 are arranged at the bottom of each twisting machine 27, and the transverse travelling mechanisms 31 are orthogonal to the transmission roller assembly line 1 and can be arranged at the positions of gaps among the transmission roller units 25.
Specifically, when the 180-degree mobile tilter 2 needs to drive the i-beam unit 3 to overturn, the twister 27 drives the rotating shaft 28 to rotate, and then drives the first overturning arm 30 and the second overturning arm 29 to rotate through the rotating shaft 28, so that the second overturning arm 29 in the vertical state rotates to the horizontal state, the first overturning arm 30 in the horizontal state rotates to the vertical state, and then drives the i-beam unit 3 between the second overturning arm 29 and the first overturning arm 30 to rotate by 90 °.
The large-section I-shaped steel beam unit 3 is turned over for 180 degrees through the following scheme: inserting a first 90-degree movable tilter 26 at one side of the large-section I-shaped steel beam unit 3, starting the first 90-degree movable tilter to turn 90 degrees, then moving the first 90-degree movable tilter 26 out in the opposite direction, then inserting a second 90-degree movable tilter 26 at one side of the large-section I-shaped steel beam unit 3 after turning 90 degrees, moving the second 90-degree movable tilter 26 for a distance of h +2 delta + a, starting the second 90-degree movable tilter 26 to turn 90 degrees, and similarly moving the second 90-degree movable tilter 26 out in the opposite direction to complete the 180-degree turning of the large-section I-shaped steel beam unit 3.
Specifically, due to the orthogonal arrangement of the transverse travelling mechanism 31 and the transmission roller assembly line 1, the 180-degree movable turnover machine 2 at the interval of the transmission roller unit 25 can move along the interval position, and the moving direction of the 180-degree movable turnover machine 2 is perpendicular to the conveying direction of the transmission roller assembly line 1.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides a big cross-section I-steel beam unit manufacturing line which characterized in that: the device comprises an assembly production line, a welding production line and a correction production line; the assembling production line comprises a transmission roller production line (1), a 180-degree movable turnover machine (2), an assembling machine (4) and a movable steel plate hoisting machine (24), wherein the assembling machine (4) is connected with the transmission roller production line (1) in the assembling production line and is arranged above the transmission roller production line (1) in the assembling production line, the movable steel plate hoisting machine (24) is arranged above the transmission roller production line (1) in the assembling production line, and the 180-degree movable turnover machine (2) in the assembling production line is orthogonally arranged with the transmission roller production line (1).
2. The large-section i-section steel beam unit manufacturing line according to claim 1, wherein: the welding assembly line comprises a transmission roller assembly line (1), a 180-degree movable turnover machine (2), a 45-degree turnover machine (5) and a cantilever type automatic submerged arc welding machine (6) in the welding assembly line, wherein the 45-degree turnover machine (5) is arranged on two sides of the transmission roller assembly line (1) in the welding assembly line, the 180-degree movable turnover machine (2) in the welding assembly line is orthogonally arranged with the transmission roller assembly line (1), and the cantilever type automatic submerged arc welding machine (6) is arranged on the outer side of the 45-degree turnover machine (5).
3. The large-section i-section steel beam unit manufacturing line according to claim 1, wherein: the correcting assembly line comprises a transmission roller assembly line (1), a 180-degree movable turnover machine (2) and a hydraulic correcting machine (7) in the correcting assembly line, wherein the 180-degree movable turnover machine (2) in the correcting assembly line is orthogonally arranged with the transmission roller assembly line (1), and the hydraulic correcting machine (7) is arranged on two sides of the transmission roller assembly line (1) in the correcting assembly line.
4. The large-section i-section steel beam unit manufacturing line according to claim 1, wherein: driving roller assembly line (1) constitute by driving roller unit (25) and welding section transfer roller (23), driving roller unit (25) are arranged at a certain interval each other, and driving roller unit (25) include longeron (8), roller bearing (9), landing leg (10) and balance adjusting device (11), longeron (8) below is equipped with landing leg (10), landing leg (10) middle part is equipped with balance adjusting device (11), roller bearing (9) set up between longeron (8).
5. The large-section I-shaped steel beam unit manufacturing line according to claim 4, wherein: the welding section conveying roller (23) comprises notches (12), and the notches (12) are asymmetrically arranged on the longitudinal beams (8) on two sides.
6. The large-section i-section steel beam unit manufacturing line according to claim 1, wherein: the movable steel plate hoisting machine (24) at least comprises two overturning hanging frames, each overturning hanging frame comprises a main beam (14), a support (15), a sliding rail (17) and a rail clamping device (18), the sliding rail (17) is arranged on the ground (19) on two sides of the transmission roller assembly line (1), the rail clamping devices (18) are arranged at the bottom of the support (15) and arranged on the sliding rails (17), and the main beams (14) are arranged at the top of the support (15).
7. The large-section I-shaped steel beam unit manufacturing line according to claim 6, wherein: be equipped with two at least electric block (13) on girder (14), no damage clamp (16) is connected through the rope in electric block (13).
8. The large-section i-section steel beam unit manufacturing line according to claim 2, wherein: 45 upset machine (5) constitute by L type roll-over stand (20) and hydraulic base (22), L type roll-over stand (20) and hydraulic base (22) are connected through articulated bolt (21), when L type roll-over stand (20) rotated for hydraulic base (22), L type roll-over stand (20) rotated along the axis of articulated bolt (21).
9. The large-section i-section steel beam unit manufacturing line according to claim 1, wherein: the 180-degree movable turnover machine (2) is formed by at least mutually matching and turning two 90-degree movable turnover machines (26), each 90-degree movable turnover machine (26) comprises a first turnover arm (30) and a second turnover arm (29), and the first turnover arm (30) and the second turnover arm (29) form an included angle of 90 degrees.
10. The large-section i-section steel beam unit manufacturing line according to claim 9, wherein: the turnover arm I (30) and the turnover arm II (29) are connected into a whole through a rotating shaft (28), twisting machines (27) are installed at two ends of the rotating shaft (28), a transverse walking mechanism (31) is arranged at the bottom of each twisting machine (27), and the transverse walking mechanism (31) is orthogonal to the transmission roller assembly line (1).
CN202122184257.5U 2021-09-09 2021-09-09 Large-section I-shaped steel beam unit manufacturing line Active CN216138613U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122184257.5U CN216138613U (en) 2021-09-09 2021-09-09 Large-section I-shaped steel beam unit manufacturing line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122184257.5U CN216138613U (en) 2021-09-09 2021-09-09 Large-section I-shaped steel beam unit manufacturing line

Publications (1)

Publication Number Publication Date
CN216138613U true CN216138613U (en) 2022-03-29

Family

ID=80811517

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122184257.5U Active CN216138613U (en) 2021-09-09 2021-09-09 Large-section I-shaped steel beam unit manufacturing line

Country Status (1)

Country Link
CN (1) CN216138613U (en)

Similar Documents

Publication Publication Date Title
CN111604622A (en) Application method of horizontal digital assembly welding technology for welding H-shaped steel
CN104308447A (en) Automatic overturning device for linear steel tube bundle structural components
CN104325231B (en) Steel pipe bundle combining structure component automatic assembling welder
CN102139432B (en) Tool device for crane
CN104353937A (en) Automatic assembling and welding device for straight steel pipe bundles
CN113601194B (en) Manufacturing production line and construction method of large-section I-shaped steel beam unit
JP2005002702A (en) Apparatus for erecting/removing saddle type monorail girder
CN216138613U (en) Large-section I-shaped steel beam unit manufacturing line
CN114012372A (en) Construction method of super-large-diameter single-pile composite cylinder
JPH09256323A (en) Bridge girder erection device
CN110205946B (en) Swivel spherical hinge steel skeleton for bridge swivel construction
CN104400430A (en) Automatic production process and device of steel pipe bundle combined structural component
JPH1052794A (en) Girder material assembling equipment
CN115262414A (en) Trestle-free steel girder sliding track construction and installation structure and construction method
CN214530227U (en) Supporting equipment for bridge engineering construction
CN202037427U (en) Tooling device for crane
CN114310119A (en) Automatic assembling machine for H-shaped steel
CN108465985B (en) Double-splice welding correction production line
CN216334968U (en) Movable type H-shaped steel 90-degree turnover mechanism
CN117505739A (en) A box girder steel bar assembly frame and assembly method
CN214770301U (en) Stirrup welding production line
CN212886018U (en) Rebar cage segmented connection processing platform
CN115488567A (en) Multidirectional automatic adjusting jig frame for large-diameter steel pipe assembly and using method
CN116275848A (en) A horizontal automatic rounding device for large pressure steel pipes
CN216780885U (en) Turning tool for steel pipe welding manufacturing

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant