CN112917070A - Industrial welding robot - Google Patents
Industrial welding robot Download PDFInfo
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- CN112917070A CN112917070A CN202110138465.3A CN202110138465A CN112917070A CN 112917070 A CN112917070 A CN 112917070A CN 202110138465 A CN202110138465 A CN 202110138465A CN 112917070 A CN112917070 A CN 112917070A
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- fixedly connected
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0538—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor for rotating tubes, e.g. rollers
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses an industrial welding robot which comprises a base, wherein four supporting rods are fixedly connected to the base, a transverse plate is fixedly connected to the upper ends of the four supporting rods together, a groove is formed in the upper end of the base, two arc-shaped plates are connected in the groove in a sliding mode, a transmission mechanism is arranged between the two arc-shaped plates and the base, a plurality of driven rollers are installed at the upper ends of the two arc-shaped plates, supporting blocks located on the left side and the right side of the groove are fixedly connected to the base, an electric telescopic rod is fixedly connected to the bottom of the transverse plate, a welding head is fixedly connected to the output end of the electric telescopic rod, T-shaped rods are fixedly connected to two sides of the output end of the electric telescopic rod. The steel pipe clamping device is reasonable in structure, can clamp steel pipes, can ensure that the abutted positions of the steel pipes are positioned below a welding head, is convenient to weld, improves the working efficiency, and greatly reduces the labor capacity of workers.
Description
Technical Field
The invention relates to the technical field of robots, in particular to an industrial welding robot.
Background
The prior art discloses an industrial welding robot with application number of CN201910458924.9, which comprises a base, a left motor, a right motor, a gear, a mounting rod, an arc-shaped block, a lantern ring, a gear ring, a connecting frame, a lifting mechanism, a welding head, a distance sensor and the like; base top left side is equipped with left motor, and base top right side is equipped with right motor, all is equipped with the gear on the output shaft of left motor and right motor, and both sides all are equipped with the installation pole around the base top left and right sides. The device can be intelligently controlled to weld the steel pipe in the whole process through the arranged control box, the time for contacting sparks by eyes of people can be effectively reduced, the steel pipe can be further fixed through the arranged fixed annular sleeve and the pressing sleeve, and the joint of the steel pipe in the welding process is prevented from being separated.
When it welds the steel pipe, need the manual work to fix two steel pipes and the junction of two steel pipes needs under the soldered connection, so greatly reduced to steel pipe welding's efficiency, also increased staff's the amount of labour, therefore we have designed an industry welding robot and have solved above problem.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an industrial welding robot which can clamp a steel pipe, ensure that the butt of the steel pipe is positioned below a welding head, facilitate welding, improve working efficiency and greatly reduce the labor capacity of workers.
In order to achieve the purpose, the invention adopts the following technical scheme:
an industrial welding robot comprises a base, wherein four supporting rods are fixedly connected to the base, a transverse plate is fixedly connected to the upper ends of the four supporting rods together, a groove is formed in the upper end of the base, two arc-shaped plates are connected to the groove in a sliding mode, a transmission mechanism is arranged between the two arc-shaped plates and the base, a plurality of driven rollers are installed at the upper ends of the two arc-shaped plates, supporting blocks located on the left side and the right side of the groove are fixedly connected to the base, an electric telescopic rod is fixedly connected to the bottom of the transverse plate, a welding head is fixedly connected to the output end of the electric telescopic rod, T-shaped rods are fixedly connected to the two sides of the output end of the electric telescopic rod, arc-shaped blocks are arranged above the two arc-shaped plates, a plurality of power rollers are installed at the bottoms of, the interior bottom fixedly connected with of recess is first well hollow rod, sliding connection has first T type piece in the first well hollow rod, the upper end of first T type piece is higher than the upper end of driven voller, the first spring of fixedly connected with between the interior bottom of first T type piece and first well hollow rod, be equipped with down the mechanism between electric telescopic handle's output and the first T type piece, one of them be equipped with canceling release mechanical system between T type pole and the drive mechanism.
Preferably, drive mechanism includes the first screw rod of being connected with the recess inner wall rotation, the other end fixedly connected with second screw rod of first screw rod, it is equipped with the through-hole to run through on the first cavity pole, first screw rod and second screw rod all run through the through-hole and rather than rotate and be connected, the other end of second screw rod runs through the base and rather than rotate and be connected, the one end fixedly connected with hand wheel that second screw rod and first screw rod carried on the back mutually.
Preferably, the first screw rod and the second screw rod have opposite thread directions, and are fixedly connected through welding.
Preferably, stop gear is including the cover on T type pole and rather than sliding connection's second T type piece, fixedly connected with second spring between second T type piece and the T type pole, the second spring housing is in the outside of T type pole, the pole is well in the upper end fixedly connected with second of arc piece, the lower extreme of second T type piece runs through the second well pole and rather than inner wall sliding connection, fixedly connected with fourth spring between the interior bottom of second T type piece and second well pole.
Preferably, the power roller is externally provided with an anti-slip sleeve, and the anti-slip sleeve is made of rubber.
Preferably, the pressing mechanism comprises two L-shaped rods fixed in front of and behind the output end of the electric telescopic rod, the front end and the rear end of the first T-shaped block are fixedly connected with abutting blocks, and the two abutting blocks are respectively opposite to the two L-shaped rods.
Preferably, canceling release mechanical system is including fixing the gear on the second screw rod outer wall, fixedly connected with horizontal pole on the T type pole, the below of horizontal pole is equipped with the rack board, fixedly connected with third spring and telescopic link do not wear the thing third spring cover in the outside of telescopic link between rack board and the horizontal pole.
Preferably, the two supporting blocks are arranged in an arc shape, and the arc concave surfaces of the supporting blocks are flush with the upper end of the driven roller.
Compared with the prior art, the invention has the beneficial effects that:
placing the two welded steel pipes on the arc-shaped plate, abutting against the upper ends of the driven roller and the supporting block, abutting against the steel pipes and the first T-shaped block, starting an electric telescopic rod, driving a welding head, an L-shaped rod, the T-shaped rod and the arc-shaped block to move downwards by the electric telescopic rod, and abutting a power roller against the upper ends of the steel pipes along with the downward movement of the output end of the electric telescopic rod, so that the steel pipes can be clamped through the power roller and the driven roller; the output end of the electric telescopic rod continues to move downwards, the L-shaped rod abuts against the abutting block, so that the abutting block and the first T-shaped block can move downwards and do not abut against the steel pipe, the output end of the electric telescopic rod continues to move, the rack plate is meshed with the gear and drives the gear to rotate, and the arc plates cannot rotate in the grooves and the thread directions of the first screw rod and the second screw rod are opposite, so that when the first screw rod and the second screw rod rotate, relative movement of the two arc plates can be realized, relative movement of the two steel pipes can be realized, when the two steel pipes abut against each other, the welding head is close to the steel pipe, and the abutting part of the steel pipe is just opposite to the welding head; so not only can carry out stable spacing to the steel pipe, also can guarantee simultaneously that the counterbalance department of steel pipe is relative with the soldered connection, when improving work efficiency, also greatly reduced staff's the amount of labour.
In conclusion, the steel pipe clamping device is reasonable in structure, can clamp steel pipes, can ensure that the abutted positions of the steel pipes are located below a welding head, is convenient to weld, improves the working efficiency, and greatly reduces the labor amount of workers.
Drawings
FIG. 1 is a schematic structural diagram of an industrial welding robot according to the present invention;
FIG. 2 is a side view of a first T-block of an industrial welding robot in accordance with the present invention;
FIG. 3 is a side view of an output end of an electric telescopic rod in an industrial welding robot according to the present invention;
FIG. 4 is a side view of a hollow rod in an industrial welding robot in accordance with the present invention;
fig. 5 is a side view of a part of the structure of an arc-shaped plate in the industrial welding robot.
In the figure: the device comprises a base 1, a groove 2, an arc-shaped plate 3, a first screw rod 4, a second screw rod 5, a first hollow rod 6, a first spring 7, a first T-shaped block 8, a butting block 9, a driven roller 10, a supporting block 11, a supporting rod 12, a transverse plate 13, an electric telescopic rod 14, a T-shaped rod 15, a welding head 16, a L-shaped rod 17, a second T-shaped block 18, a second spring 19, a second hollow rod 20, a fourth spring 21, an arc-shaped block 22, a power roller 23, an anti-skid sleeve 24, a cross rod 25, a rack plate 26, a gear 27, a telescopic rod 28, a third spring 29, a through hole 30 and a hand wheel 31.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-5, an industrial welding robot, includes base 1, four bracing pieces 12 of fixedly connected with on the base 1, the common fixedly connected with diaphragm 13 in upper end of four bracing pieces 12, the upper end of base 1 is equipped with recess 2, and sliding connection has two arcs 3 in the recess 2, and the bottom of arc 3 is the rectangle setting, so can slide in recess 2.
Be equipped with drive mechanism between two arc 3 and the base 1, drive mechanism includes the first screw rod 4 of being connected with 2 inner wall rotations of recess, the other end fixedly connected with second screw rod 5 of first screw rod 4, it is equipped with through-hole 30 to run through on the first hollow rod 6, first screw rod 4 and second screw rod 5 all run through-hole 30 and rotate rather than being connected, the other end of second screw rod 5 runs through base 1 and rotates rather than being connected, the one end fixedly connected with hand wheel 31 that second screw rod 5 and first screw rod 4 carried on the back mutually, the outside cover of hand wheel 31 is equipped with the lag, can protect the hand of work.
The thread directions of the first screw rod 4 and the second screw rod 5 are opposite, and the first screw rod 4 and the second screw rod 5 are fixedly connected by welding, so that the first screw rod 4 and the second screw rod 5 can be stably connected together; when rotating first screw 4 and second screw 5, because arc 3 can't rotate in recess 2, consequently first screw 4 and second screw 5 when rotating, can realize that two arc 3 are relative or move back to back.
A plurality of driven rollers 10 are arranged at the upper ends of the two arc-shaped plates 3, and the driven rollers 10 are distributed in an arc shape; fixedly connected with is located the supporting shoe 11 of the both sides about recess 2 on the base 1, and two supporting shoes 11 are the arc setting, and the arc concave surface of supporting shoe 11 flushes with the upper end of driven voller 10, so can be stable support steel pipe.
An electric telescopic rod 14 is fixedly connected to the bottom of the transverse plate 13, a welding head 16 is fixedly connected to the output end of the electric telescopic rod 14, T-shaped rods 15 are fixedly connected to two sides of the output end of the electric telescopic rod 14, and a tetrafluoride film is arranged on the outer wall of each T-shaped rod 15 to facilitate sliding of the second T-shaped block 18; the top of two arc 3 all is equipped with arc piece 22, and a plurality of power rollers 23 are installed to the bottom of arc piece 22, and power roller 23 is the arc at the concave surface of arc piece 22 and distributes, and the outside of power roller 23 is equipped with antiskid cover 24, and antiskid cover 24's material is rubber.
Be equipped with stop gear between the T type pole 15 of two arc pieces 22 and homonymy, stop gear is including the cover on T type pole 15 and rather than sliding connection's second T type piece 18, fixedly connected with second spring 19 between second T type piece 18 and the T type pole 15, second spring 19 covers the outside at T type pole 15, the upper end fixedly connected with second hollow pole 20 of arc piece 22, the lower extreme of second T type piece 18 runs through second hollow pole 20 and rather than inner wall sliding connection, fixedly connected with fourth spring 21 between the interior bottom of second T type piece 18 and second hollow pole 20.
Recess 2's the first hollow pole 6 of interior bottom fixedly connected with, sliding connection has first T type piece 8 in the first hollow pole 6, the upper end of first T type piece is higher than the upper end of driven voller 10, first T type piece 8 and the first interior bottom of well hollow pole 6 between first spring 7 of fixedly connected with, be equipped with between the output of electric telescopic handle 14 and the first T type piece 8 and push down the mechanism, push down the mechanism including fixing two L type poles 17 at the back before 14 outputs of electric telescopic handle, the equal fixedly connected with in both ends supports piece 9 around the first T type piece 8, two support piece 9 respectively with two L type poles 17 just relatively.
A reset mechanism is arranged between one T-shaped rod 15 and the transmission mechanism, the reset mechanism comprises a gear 27 fixed on the outer wall of the second screw rod 5, a cross rod 25 is fixedly connected onto the T-shaped rod 15, a rack plate 26 is arranged below the cross rod 25, and a third spring 29 and a telescopic rod 28 are fixedly connected between the rack plate 26 and the cross rod 25, and the third spring 29 is sleeved outside the telescopic rod 28.
In the invention, a worker puts two welded steel pipes on an arc-shaped plate 3 and abuts against the upper ends of a driven roller 10 and a supporting block 11, the steel pipes abut against a first T-shaped block 8, then the electric telescopic rod 14 is started, the electric telescopic rod 14 drives a welding head 16, an L-shaped rod 17, a T-shaped rod 15 and an arc-shaped block 22 to move downwards, and a power roller 23 abuts against the upper ends of the steel pipes along with the downward movement of the output end of the electric telescopic rod 14, so that the steel pipes can be clamped through the power roller 23 and the driven roller 10;
the output end of the electric telescopic rod 14 continues to move downwards, the L-shaped rod 17 abuts against the abutting block 9, so that the abutting block 9 and the first T-shaped block 8 can move downwards and do not abut against the steel pipe, the output end of the electric telescopic rod 14 continues to move, the rack plate 26 is meshed with the gear 27 and drives the gear to rotate at the moment, and the arc-shaped plates 3 cannot rotate in the grooves 2, and the thread directions of the first screw rod 4 and the second screw rod 5 are opposite, so that the relative movement of the two arc-shaped plates 3 can be realized when the first screw rod 4 and the second screw rod 5 rotate;
because the T-shaped rod 15 moves downwards all the time, the second T-shaped block 18 moves downwards to compress the fourth spring 21, so that the steel pipe can be more stably limited; when the two arc plates 3 move relatively, the second T-shaped block 18 moves along with the arc plates 3, so that the two steel pipes can move relatively; when the two steel pipes are abutted, the welding head 16 is close to the steel pipes, the abutted part of the steel pipes is just opposite to the welding head 16, and the welding head 16 is started to weld and connect the two steel pipes; then starting the power roller 23, and driving the steel pipe to rotate by the rotation of the power roller 23, so that the steel pipe can be circumferentially welded;
after the welding is finished, the electric telescopic rod 14 is reset, the rack plate 26 drives the gear 27 to rotate reversely, and the arc-shaped plate 3 and the steel pipe move relatively or together; the first screw rod 4 and the second screw rod 5 are reset, the corresponding arc-shaped plate 3 is reset, the first T-shaped block 8 is reset under the action of the first spring 7 and is abutted against the steel pipe, the second T-shaped block 18 is reset under the action of the second spring 19, and finally, all the blocks are reset;
the whole process of welding the steel pipe is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The industrial welding robot comprises a base (1) and is characterized in that four supporting rods (12) are fixedly connected to the base (1), a transverse plate (13) is fixedly connected to the upper ends of the four supporting rods (12) jointly, a groove (2) is formed in the upper end of the base (1), two arc-shaped plates (3) are connected to the groove (2) in a sliding mode, a transmission mechanism is arranged between the two arc-shaped plates (3) and the base (1), a plurality of driven rollers (10) are installed at the upper ends of the two arc-shaped plates (3), supporting blocks (11) located on the left side and the right side of the groove (2) are fixedly connected to the base (1), an electric telescopic rod (14) is fixedly connected to the bottom of the transverse plate (13), a welding head (16) is fixedly connected to the output end of the electric telescopic rod (14), and T-shaped rods (15) are fixedly connected to the two, two the top of arc (3) all is equipped with arc piece (22), a plurality of power rollers (23) are installed to the bottom of arc piece (22), two be equipped with stop gear between T type pole (15) of arc piece (22) and homonymy, interior bottom fixedly connected with of recess (2) first well hollow rod (6), sliding connection has first T type piece (8) in first well hollow rod (6), the upper end of first T type piece (8) is higher than the upper end of driven voller (10), first T type piece (8) and first well fixedly connected with first spring (7) between the interior bottom of hollow rod (6), be equipped with down between the output of electric telescopic handle (14) and first T type piece (8) and push down the mechanism, one of them be equipped with canceling release mechanical system between T type pole (15) and the drive mechanism.
2. The industrial welding robot as claimed in claim 1, wherein the transmission mechanism comprises a first screw (4) rotatably connected with the inner wall of the groove (2), the other end of the first screw (4) is fixedly connected with a second screw (5), a through hole (30) is arranged on the first hollow rod (6) in a penetrating manner, the first screw (4) and the second screw (5) both penetrate through the through hole (30) and are rotatably connected with the same, the other end of the second screw (5) penetrates through the base (1) and is rotatably connected with the same, and a hand wheel (31) is fixedly connected with one end of the second screw (5) opposite to the first screw (4).
3. The industrial welding robot as claimed in claim 2, characterized in that the first screw (4) and the second screw (5) have opposite thread directions, and the first screw (4) and the second screw (5) are fixedly connected by welding.
4. The industrial welding robot as claimed in claim 1, wherein the limiting mechanism comprises a second T-shaped block (18) sleeved on the T-shaped rod (15) and slidably connected with the T-shaped rod, a second spring (19) is fixedly connected between the second T-shaped block (18) and the T-shaped rod (15), the second spring (19) is sleeved outside the T-shaped rod (15), a second hollow rod (20) is fixedly connected to the upper end of the arc-shaped block (22), the lower end of the second T-shaped block (18) penetrates through the second hollow rod (20) and slidably connected with the inner wall of the second hollow rod, and a fourth spring (21) is fixedly connected between the second T-shaped block (18) and the inner bottom of the second hollow rod (20).
5. The industrial welding robot according to claim 1, characterized in that the power roller (23) is externally provided with an anti-slip sleeve (24), and the anti-slip sleeve (24) is made of rubber.
6. The industrial welding robot as claimed in claim 1, wherein the pressing mechanism comprises two L-shaped rods (17) fixed at the front and back of the output end of the electric telescopic rod (14), the front and back ends of the first T-shaped block (8) are fixedly connected with abutting blocks (9), and the two abutting blocks (9) are respectively opposite to the two L-shaped rods (17).
7. The industrial welding robot as claimed in claim 3, wherein the reset mechanism comprises a gear (27) fixed on the outer wall of the second screw (5), a cross bar (25) is fixedly connected to the T-shaped bar (15), a rack plate (26) is arranged below the cross bar (25), and a third spring (29) and a telescopic rod (28) are fixedly connected between the rack plate (26) and the cross bar (25), and the third spring (29) is sleeved outside the telescopic rod (28).
8. An industrial welding robot according to claim 1, characterized in that both said support blocks (11) are arc-shaped and the arc-shaped concave surfaces of said support blocks (11) are flush with the upper end of the driven roller (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138465.3A CN112917070A (en) | 2021-02-01 | 2021-02-01 | Industrial welding robot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110138465.3A CN112917070A (en) | 2021-02-01 | 2021-02-01 | Industrial welding robot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112917070A true CN112917070A (en) | 2021-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110138465.3A Pending CN112917070A (en) | 2021-02-01 | 2021-02-01 | Industrial welding robot |
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| CN (1) | CN112917070A (en) |
Cited By (5)
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| CN113941822A (en) * | 2021-11-23 | 2022-01-18 | 江苏韦兰德特种装备科技有限公司 | Equipment for liquefied natural gas cylinder for vehicle and welding method thereof |
| CN114289964A (en) * | 2022-01-19 | 2022-04-08 | 合肥宏程机械科技有限公司 | Welding equipment for stainless steel pipe |
| CN114654160A (en) * | 2022-04-14 | 2022-06-24 | 桂林航天工业学院 | Butt welding machine and driving assembly |
| CN114713941A (en) * | 2022-06-07 | 2022-07-08 | 江苏格兰环境科技有限公司 | Heating furnace girth welding device |
| CN116460515A (en) * | 2023-06-20 | 2023-07-21 | 江苏泰高建设有限公司 | Metal piece welding device for constructional engineering |
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| CN113941822B (en) * | 2021-11-23 | 2024-05-14 | 江苏韦兰德特种装备科技有限公司 | Welding equipment and welding method for liquefied natural gas cylinder for vehicle |
| CN114289964A (en) * | 2022-01-19 | 2022-04-08 | 合肥宏程机械科技有限公司 | Welding equipment for stainless steel pipe |
| CN114654160A (en) * | 2022-04-14 | 2022-06-24 | 桂林航天工业学院 | Butt welding machine and driving assembly |
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| CN116460515A (en) * | 2023-06-20 | 2023-07-21 | 江苏泰高建设有限公司 | Metal piece welding device for constructional engineering |
| CN116460515B (en) * | 2023-06-20 | 2023-09-01 | 江苏泰高建设有限公司 | Metal piece welding device for constructional engineering |
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