CN107717193B - Numerical control steel pipe bundle cutting machine - Google Patents
Numerical control steel pipe bundle cutting machine Download PDFInfo
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- CN107717193B CN107717193B CN201711159870.3A CN201711159870A CN107717193B CN 107717193 B CN107717193 B CN 107717193B CN 201711159870 A CN201711159870 A CN 201711159870A CN 107717193 B CN107717193 B CN 107717193B
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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
- B23K10/00—Welding or cutting by means of a plasma
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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)
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- Arc Welding In General (AREA)
Abstract
The invention relates to a numerical control steel pipe bundle cutting machine, and belongs to the technical field of cutting equipment. The steel tube bundle cutting device comprises an input roller way, an input turnover mechanism, an input intermediate roller way, a steel tube bundle cutting host, an output intermediate roller way, an output roller way and an output turnover mechanism, wherein the input end of the steel tube bundle cutting host is provided with the input intermediate roller way, the input end of the input intermediate roller way is provided with the input roller way, and one side of the input roller way is provided with the input turnover mechanism; the output end of the steel pipe bundle cutting host is provided with an output middle roller way, the output end of the output middle roller way is provided with an output roller way, and one side of the output roller way is provided with an output turnover mechanism. The invention has simple, compact and reasonable structure and stable and reliable work, is convenient for workers to operate while greatly reducing the equipment cost, greatly improves the cutting quality of the steel pipe bundle, and is suitable for the mass production of the steel pipe bundle.
Description
Technical Field
The invention relates to a numerical control steel pipe bundle cutting machine, and belongs to the technical field of cutting equipment.
Background
At present, the domestic steel pipe bundle cutting and punching processing is mainly carried out by manual punching, mainly through scribing, lofting, cutting or drilling by workers, the cutting efficiency is very low, the cutting precision is not high, the labor intensity of the workers is high, and the steel pipe bundle cutting and punching processing is not suitable for mass production of the steel pipe bundles.
Disclosure of Invention
The invention aims to overcome the defects, and provides the numerical control steel pipe bundle cutting machine which is convenient for workers to operate while greatly reducing the equipment cost, greatly improves the cutting quality of the steel pipe bundle and is suitable for mass production of the steel pipe bundle.
According to the technical scheme provided by the invention, the numerical control steel pipe bundle cutting machine comprises an input roller way, an input turnover mechanism, an input intermediate roller way, a steel pipe bundle cutting host, an output intermediate roller way, an output roller way and an output turnover mechanism, and is characterized in that: an input middle roller way is arranged at the input end of the steel tube bundle cutting host, an input roller way is arranged at the input end of the input middle roller way, and an input turnover mechanism is arranged at one side of the input roller way; an output middle roller way is arranged at the output end of the steel tube bundle cutting host, an output roller way is arranged at the output end of the output middle roller way, and an output turnover mechanism is arranged at one side of the output roller way;
the steel pipe bundle cutting host comprises a main frame, a lifting portal, a lifting guide rail, a lifting frame, a lifting mechanism, a transverse guide rail, a transverse frame, a transverse mechanism, a telescopic mechanism, an initial positioning anti-collision device, a plasma cutting torch, a host internal roller way, a length measuring device, a reference roller assembly and a side push roller assembly, wherein a host internal roller way is arranged in the middle of the inside of the main frame, and the host internal roller way is provided with the length measuring device; a lifting portal is fixed in the main frame, a plurality of side-push roller assemblies are arranged on the left side of the lifting portal, a plurality of reference roller assemblies are arranged on the right side of the lifting portal, and each side-push roller assembly and one reference roller assembly are arranged in bilateral symmetry along the lifting portal; the left side and the right side of the lifting portal frame are provided with lifting guide rails, and the lifting guide rails are connected with a lifting frame in a sliding manner; a lifting mechanism is arranged between the lifting frame and the lifting portal frame, a transverse moving guide rail is arranged on the lifting frame, the transverse moving guide rail is connected with a transverse moving frame in a sliding way, and a transverse moving mechanism is arranged between the transverse moving frame and the transverse moving guide rail; the transverse moving frame is connected with a telescopic mechanism, the telescopic mechanism is connected with an initial positioning anti-collision device, and the initial positioning anti-collision device is connected with a plasma cutting torch.
Further, length measuring device includes spring holder, spring beam, spring clamp, pinch roller seat, pinch roller gear, encoder and encoder gear, fixes the spring beam on the spring holder, the suit spring on the spring beam, and spring clamp sliding connection is on the spring beam and by the spring-supported, fixes the pinch roller seat on the spring clamp, rotates on the pinch roller seat and connects the pinch roller, and pinch roller gear is connected to pinch roller one end, and the pinch roller gear is connected with encoder gear engagement, and the encoder gear passes through the coupling joint encoder.
Furthermore, the initial positioning anti-collision device comprises a fixing flange, a clamping flange, a front flange, a positioning pin, a steel wire rope, a spring and a proximity switch, wherein the fixing flange is connected with the front flange through the steel wire rope, the clamping flange is arranged between the fixing flange and the front flange, the positioning pin is arranged in the clamping flange, the spring is arranged between the clamping flange and the fixing flange, and the proximity switch is connected to the clamping flange.
Furthermore, the side-push roller assembly comprises a base, a guide sleeve, a guide rod, a side-push roller seat, a side-push cylinder and a side-push roller, wherein the guide sleeve is fixed on the base, the guide rod is connected in the guide sleeve in a sliding manner, the front end of the guide rod is connected with the side-push roller seat, the front end of the side-push roller seat is provided with the side-push roller, and the rear end of the side-push roller seat is connected with the driving end of the side-push cylinder.
Furthermore, the lifting door frame is of a door-shaped structure.
Compared with the prior art, the invention has the following advantages:
the invention has simple, compact and reasonable structure and stable and reliable work, is convenient for workers to operate while greatly reducing the equipment cost, greatly improves the cutting quality of the steel pipe bundle, and is suitable for the mass production of the steel pipe bundle.
Drawings
FIG. 1 is a front view of the present invention.
FIG. 2 is a top view of the present invention.
Fig. 3 is a side view of the steel pipe bundle cutting main machine.
Fig. 4 is a top view of the steel pipe bundle cutting main machine.
Fig. 5 is a front view of the side thrust roller assembly.
Fig. 6 is a front view of the length measuring device.
Fig. 7 is a front view of the collision avoidance device in an initial position.
Description of the reference numerals: 1-input roller way, 2-input turnover mechanism, 3-input middle roller way, 4-steel tube bundle cutting host machine, 4.1-main frame, 4.2-lifting portal frame, 4.3-lifting guide rail, 4.4-lifting frame, 4.5-lifting mechanism, 4.6-transverse guide rail, 4.7-transverse frame, 4.8-transverse mechanism, 4.9-telescopic mechanism, 4.10-initial positioning anti-collision device, 4.10.1-fixed flange, 4.10.2-clamping flange, 4.10.3-front flange, 4.10.4-positioning pin, 4.10.5-steel wire rope, 4.10.6-spring, 4.10.7-proximity switch, 4.11-plasma cutting torch, 4.12-main machine inner roller way, 4.1-main frame, 4.9-telescopic mechanism, 4.10-initial positioning anti-collision device, 4.10.1-fixed flange, 4.10.2-clamping flange, 4.10.3-front flange, 4.4.10.4-positioning pin, 4.10.5-steel wire rope, 4.6-spring, 4.10.7-proximity switch, 4.11-plasma cutting torch, 4.12-main machine inner roller way 4.13-length measuring device, 4.13.1-spring seat, 4.13.2-spring rod, 4.13.3-spring, 4.13.4-spring press plate, 4.13.5-pinch roller seat, 4.13.6-pinch roller, 4.13.7-pinch roller gear, 4.13.8-encoder, 4.13.9-encoder gear, 4.14-reference roller component, 4.15-side push roller component, 4.15.1-base, 4.15.2-guide sleeve, 4.15.3-guide rod, 4.15.4-side push roller seat, 4.15.5-side push cylinder, 4.15.6-side push roller, 5-output middle roller way, 6-output roller way, 7-output turnover mechanism and 8-numerical control operation cabinet.
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
as shown in fig. 1 to 2, the present invention mainly includes an input roller bed 1, an input turnover mechanism 2, an input intermediate roller bed 3, a steel pipe bundle cutting host 4, an output intermediate roller bed 5, an output roller bed 6, and an output turnover mechanism 7.
An input intermediate roller way 3 is arranged at the input end of the steel tube bundle cutting host 4, an input roller way 1 is arranged at the input end of the input intermediate roller way 3, and an input turnover mechanism 2 is arranged on one side of the input roller way 1.
An output middle roller way 5 is arranged at the output end of the steel pipe bundle cutting host machine 4, an output roller way 6 is arranged at the output end of the output middle roller way 5, and an output turnover mechanism 7 is arranged on one side of the output roller way 6.
As shown in fig. 3 to 4, the steel pipe bundle cutting host 4 comprises a main frame 4.1, a lifting gantry 4.2, a lifting guide rail 4.3, a lifting frame 4.4, a lifting mechanism 4.5, a transverse guide rail 4.6, a transverse frame 4.7, a transverse mechanism 4.8, a telescopic mechanism 4.9, an initial positioning anti-collision device 4.10, a plasma cutting torch 4.11, a host inner roller way 4.12, a length measuring device 4.13, a reference roller assembly 4.14 and a side push roller assembly 4.15.
The middle part in the main frame 4.1 is provided with a main machine inner roller way 4.12, and the main machine inner roller way 4.12 is provided with a length measuring device 4.13.
As shown in fig. 6, the length measuring device 4.13 includes a spring seat 4.13.1, a spring rod 4.13.2, a spring 4.13.3, a spring pressing plate 4.13.4, a pinch roller seat 4.13.5, a pinch roller 4.13.6, a pinch roller gear 4.13.7, an encoder 4.13.8 and an encoder gear 4.13.9, the spring rod 4.13.2 is fixed on the spring seat 4.13.1, the spring 4.13.3 is sleeved on the spring rod 4.13.2, and the spring pressing plate 4.13.4 is slidably connected to the spring rod 4.13.2 and supported by the spring 4.13.3. Fixed pinch roller seat 4.13.5 on spring board 4.13.4, rotate on the pinch roller seat 4.13.5 and connect pinch roller 4.13.6, pinch roller gear 4.13.7 is connected to pinch roller 4.13.6 one end, and pinch roller gear 4.13.7 is connected with encoder gear 4.13.9 meshing, and encoder gear 4.13.9 passes through coupling joint encoder 4.13.8. The workpiece enters the main machine, the pressing wheel is in contact with the lower surface of the workpiece under the action of the spring, the workpiece moves to drive the pressing wheel to rotate, and the number of turns of the rotation of the pressing wheel is fed back to the system by the encoder and converted into the moving distance of the workpiece.
The main frame 4.1 is internally fixed with a lifting door frame 4.2, and the lifting door frame 4.2 is of a door-shaped structure. A plurality of side-push roller assemblies 4.15 are arranged on the left side of the lifting portal 4.2, a plurality of reference roller assemblies 4.14 are arranged on the right side of the lifting portal 4.2, and each side-push roller assembly 4.15 and one reference roller assembly 4.14 are arranged along the lifting portal 4.2 in bilateral symmetry.
As shown in fig. 5, the side push roller assembly 4.15 includes a base 4.15.1, a guide sleeve 4.15.2, a guide rod 4.15.3, a side push roller seat 4.15.4, a side push cylinder 4.15.5 and a side push roller 4.15.6, the guide sleeve 4.15.2 is fixed on the base 4.15.1, the guide sleeve 4.15.2 is slidably connected with the guide rod 4.15.3, the front end of the guide rod 4.15.3 is connected with the side push roller seat 4.15.4, the side push roller seat 4.15.6 is arranged at the front end of the side push roller seat 4.15.4, and the rear end of the side push roller seat 4.15.4 is connected with the driving end of the side push cylinder 4.15.5. When the side-push roller assembly 4.15 works, the air cylinder acts to push the steel pipe bundle workpiece to be close to the reference roller assembly.
The left side and the right side of the lifting portal frame 4.2 are provided with lifting guide rails 4.3, and the lifting guide rails 4.3 are connected with a lifting frame 4.4 in a sliding way. A lifting mechanism 4.5 is arranged between the lifting frame 4.4 and the lifting door frame 4.2, and the lifting mechanism 4.5 can drive the lifting frame 4.4 to move up and down along the lifting guide rail 4.3. The lifting frame 4.4 is provided with a transverse moving guide rail 4.6, the transverse moving guide rail 4.6 is connected with a transverse moving frame 4.7 in a sliding way, and a transverse moving mechanism 4.8 is arranged between the transverse moving frame 4.7 and the transverse moving guide rail 4.6. The transverse moving frame 4.7 is connected with a telescopic mechanism 4.9, the telescopic mechanism 4.9 is connected with an initial positioning anti-collision device 4.10, and the initial positioning anti-collision device 4.10 is connected with a plasma cutting torch 4.11.
As shown in fig. 7, the initial positioning anti-collision device 4.10 includes a fixed flange 4.10.1, a clamping flange 4.10.2, a front flange 4.10.3, a positioning pin 4.10.4, a steel cable 4.10.5, a spring 4.10.6 and a proximity switch 4.10.7.
The fixed flange 4.10.1 is connected with the front flange 4.10.3 through a steel wire rope 4.10.5, the clamping flange 4.10.2 is arranged between the fixed flange 4.10.1 and the front flange 4.10.3, the positioning pin 4.10.4 is arranged in the clamping flange 4.10.2, the spring 4.10.6 is arranged between the clamping flange 4.10.2 and the fixed flange 4.10.1, and the proximity switch 4.10.7 is connected to the clamping flange 4.10.2. When the cutting torch is in work, the clamping flange moves backwards when the cutting torch touches a workpiece, the proximity switch is fed back to the system in a sensing manner to find the position of the workpiece, then the telescopic mechanism drives the cutting torch to move backwards, the clamping flange resets to the position of the positioning pin under the action of the spring, and the cutting torch returns to the state before collision.
When the steel pipe bundle cutting machine works in practice, a steel pipe bundle is horizontally placed or conveyed on the input turnover mechanism, the input turnover mechanism enables the turnover mechanism to turn over through the action of a hydraulic cylinder to vertically place the steel pipe bundle on an input roller way, the input roller way conveys the steel pipe bundle into a main machine inner roller way of a steel pipe bundle cutting main machine through the rotation of a motor, a side-push roller wheel enables the steel pipe bundle to be close to a reference roller wheel through the action of a cylinder, a length measuring device starts counting and length measuring, and a numerical control system controls a lifting portal frame and a moving mechanism servo motor; the distance between the plasma cutting torch and the DC motor on the telescopic mechanism is controlled; sensing the position of a workpiece through an initial positioning anti-collision device; the two sides of the steel pipe bundle are simultaneously cut and processed, the system controls the length measuring device to count the conveying distance and then perform circular cutting and processing, after cutting, the output roller way conveys the steel pipe bundle out of the steel pipe bundle cutting host machine to the input roller way through the rotation of the motor, and the input turnover mechanism enables the turnover mechanism to turn over to place the steel pipe bundle horizontally through the action of the hydraulic cylinder. The invention effectively realizes the high-precision numerical control steel pipe bundle cutting machine which can greatly reduce the labor intensity of workers and is suitable for cutting steel pipe bundles in large batches.
The foregoing description is illustrative of the present invention and is not to be construed as limiting thereof, the scope of the invention being defined by the appended claims, which may be modified in any manner without departing from the spirit of the invention.
Claims (4)
1. The utility model provides a cutting machine is restrainted to numerical control steel pipe, includes roll table (1) in the middle of input (1), input tilting mechanism (2), roll table (3), steel pipe bundle cutting host computer (4), roll table (5) in the middle of the output, rollgang (6) and output tilting mechanism (7), characterized by: an input middle roller way (3) is arranged at the input end of the steel tube bundle cutting host (4), an input roller way (1) is arranged at the input end of the input middle roller way (3), and an input turnover mechanism (2) is arranged on one side of the input roller way (1); an output intermediate roller way (5) is arranged at the output end of the steel tube bundle cutting host (4), an output roller way (6) is arranged at the output end of the output intermediate roller way (5), and an output turnover mechanism (7) is arranged on one side of the output roller way (6);
the steel pipe bundle cutting host machine (4) comprises a host machine frame (4.1), a lifting portal frame (4.2), a lifting guide rail (4.3), a lifting frame (4.4), a lifting mechanism (4.5), a transverse moving guide rail (4.6), a transverse moving frame (4.7), a transverse moving mechanism (4.8), a telescopic mechanism (4.9), an initial positioning anti-collision device (4.10), a plasma cutting torch (4.11), a host machine inner roller way (4.12), a length measuring device (4.13), a reference roller wheel assembly (4.14) and a side pushing roller wheel assembly (4.15), wherein a host machine inner roller way (4.12) is arranged in the middle of the host machine frame (4.1), and a length measuring device (4.13) is arranged on the host machine inner roller way (4.12); a lifting portal (4.2) is fixed in the main frame (4.1), a plurality of side-push roller assemblies (4.15) are arranged on the left side of the lifting portal (4.2), a plurality of reference roller assemblies (4.14) are arranged on the right side of the lifting portal (4.2), and each side-push roller assembly (4.15) and one reference roller assembly (4.14) are arranged in bilateral symmetry along the lifting portal (4.2); the left side and the right side of the lifting portal (4.2) are provided with lifting guide rails (4.3), and the lifting guide rails (4.3) are connected with lifting frames (4.4) in a sliding way; a lifting mechanism (4.5) is arranged between the lifting frame (4.4) and the lifting door frame (4.2), a transverse moving guide rail (4.6) is arranged on the lifting frame (4.4), the transverse moving frame (4.7) is connected on the transverse moving guide rail (4.6) in a sliding way, and a transverse moving mechanism (4.8) is arranged between the transverse moving frame (4.7) and the transverse moving guide rail (4.6); the transverse frame (4.7) is connected with a telescopic mechanism (4.9), the telescopic mechanism (4.9) is connected with an initial positioning anti-collision device (4.10), and the initial positioning anti-collision device (4.10) is connected with a plasma cutting torch (4.11);
the initial positioning anti-collision device (4.10) comprises a fixed flange (4.10.1), a clamping flange (4.10.2), a front flange (4.10.3), a positioning pin (4.10.4), a steel wire rope (4.10.5), a spring (4.10.6) and a proximity switch (4.10.7), wherein the fixed flange (4.10.1) is connected with the front flange (4.10.3) through the steel wire rope (4.10.5), the clamping flange (4.10.2) is arranged between the fixed flange (4.10.1) and the front flange (4.10.3), the positioning pin (4.10.4) is arranged in the clamping flange (4.10.2), the spring (4.10.6) is arranged between the clamping flange (4.10.2) and the fixed flange (4.10.1), and the proximity switch (4.10.7) is connected to the clamping flange (4.10.2).
2. The numerical control steel pipe bundle cutting machine according to claim 1, characterized in that: the length measuring device (4.13) comprises a spring seat (4.13.1), a spring rod (4.13.2), a spring (4.13.3), a spring pressing plate (4.13.4), a pinch roller seat (4.13.5), a pinch roller (4.13.6), a pinch roller gear (4.13.7), an encoder (4.13.8) and an encoder gear (4.13.9), the spring seat (4.13.1) is fixed with the spring rod (4.13.2), the spring rod (4.13.2) is sleeved with the spring (4.13.3), the spring pressing plate (4.13.4) is slidably connected onto the spring rod (4.13.2) and supported by the spring (4.13.3), the pinch roller seat (4.13.5) is fixed onto the spring pressing plate (4.13.4), the pinch roller seat (4.13.5) is rotatably connected with the pinch roller (4.13.6), one end of the pinch roller gear (4.13.6) is connected with the pinch roller gear (4.13.7.7), and the encoder (4.13.9) is connected with the pinch roller gear (13.9) through a coupler (13.9).
3. The numerical control steel pipe bundle cutting machine according to claim 1, characterized in that: the side-push roller component (4.15) comprises a base (4.15.1), a guide sleeve (4.15.2), a guide rod (4.15.3), a side-push roller seat (4.15.4), a side-push cylinder (4.15.5) and a side-push roller (4.15.6), wherein the guide sleeve (4.15.2) is fixed on the base (4.15.1), the guide rod (4.15.3) is connected in the guide sleeve (4.15.2) in a sliding manner, the front end of the guide rod (4.15.3) is connected with the side-push roller seat (4.15.4), the front end of the side-push roller seat (4.15.4) is provided with the side-push roller (4.15.6), and the rear end of the side-push roller seat (4.15.4) is connected with the driving end of the side-push cylinder (4.15.5).
4. The numerical control steel pipe bundle cutting machine according to claim 1, characterized in that: the lifting door frame (4.2) is of a door-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711159870.3A CN107717193B (en) | 2017-11-20 | 2017-11-20 | Numerical control steel pipe bundle cutting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711159870.3A CN107717193B (en) | 2017-11-20 | 2017-11-20 | Numerical control steel pipe bundle cutting machine |
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| CN107717193A CN107717193A (en) | 2018-02-23 |
| CN107717193B true CN107717193B (en) | 2022-12-02 |
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| CN201711159870.3A Active CN107717193B (en) | 2017-11-20 | 2017-11-20 | Numerical control steel pipe bundle cutting machine |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109454317B (en) * | 2018-12-27 | 2024-03-26 | 江苏双友智能装备科技股份有限公司 | Online automatic steel pipe cutting device and cutting method thereof |
| CN114799569A (en) * | 2022-05-31 | 2022-07-29 | 杭州固建机器人科技有限公司 | Processing equipment and processing method |
| CN115055897B (en) * | 2022-07-28 | 2023-11-28 | 天元建设集团有限公司 | Steel tube bundle tail end positioning and clamping device of steel tube bundle welding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201610436U (en) * | 2010-01-29 | 2010-10-20 | 锦州万友机械部件有限公司 | Roll horizontal-type high-frequency quenching machine tool |
| KR101249490B1 (en) * | 2011-02-25 | 2013-04-01 | (주)엔에스 | Slitting apparatus |
| CN203862977U (en) * | 2013-12-30 | 2014-10-08 | 南阳汉冶特钢有限公司 | Slab continuous casting and cut length measuring device |
| CN104709656B (en) * | 2015-03-11 | 2017-01-11 | 杭萧钢构股份有限公司 | Automatic-distributing conveyor line system for steel tube bundles |
| CN206479831U (en) * | 2017-03-01 | 2017-09-08 | 锦州美联桥汽车部件有限公司 | Light-wall pipe customized cut-off apparatus control system |
| CN107052646B (en) * | 2017-03-23 | 2019-07-30 | 宁波金凤焊割机械制造有限公司 | A kind of tracking device for welding of steel pipe bundle |
| CN107160002A (en) * | 2017-03-27 | 2017-09-15 | 宁波金凤焊割机械制造有限公司 | A kind of steel pipe bundle end cut method and system |
| CN207547846U (en) * | 2017-11-20 | 2018-06-29 | 无锡华联科技集团有限公司 | Numerically controlled steel pipe beam cutting machine |
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2017
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