CN112139659A

CN112139659A - Butt-joint laser hybrid welding system for thin plates of shipyard

Info

Publication number: CN112139659A
Application number: CN202011145423.4A
Authority: CN
Inventors: 汪彦钧; 潘润道; 彭敏林; 慎辰; 张吉平; 罗一恒; 李福森; 韩荃; 熊冠楚
Original assignee: China Shipbuilding NDRI Engineering Co Ltd
Current assignee: China Shipbuilding NDRI Engineering Co Ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2020-12-29

Abstract

The invention discloses a laser composite welding system for butt joint of thin plate jointed boards in a shipyard, which is characterized in that a laser composite welding jointed board pressure frame is arranged between a feeding platform and a discharging platform, and the laser composite welding jointed board pressure frame consists of an adjustable liner board and a grounding device which are arranged between two fixed type door frames, a piano key type pressing unit, a milling device, a recovery system and a welding device; the feeding platform pushes the thin plate to the welding station of the laser composite welding jointed plate pressure frame through the clamping frame, and the jointed plate is sent out of the system through the discharging platform after being automatically welded by the welding device, so that automatic line production of jointed plate butt joint is realized. Compared with the prior art, the invention has the advantages of integration of thin plate assembling, milling and welding, simple structure and good compatibility, is used for automatic butt welding of jointed plates of planar thin plates in the manufacturing and processing process of the plate-ship body of a shipyard, and can greatly improve the production efficiency of the butt welding of the thin plates.

Description

Butt-joint laser hybrid welding system for thin plates of shipyard

Technical Field

The invention relates to the technical field of jointed plate butt welding, in particular to a laser composite welding system for butt joint of thin plate jointed plates in a shipyard.

Background

Thin plate units with the plate thickness of less than 6mm account for considerable proportion in luxury cruise ships, high-end passenger rolling ships and military ships, and the assembling and welding processes of the thin plate units are greatly different from those of conventional ship plates. Due to the structural characteristics of the thin plate, the processing deformation is difficult to control, and the high requirement of shipowners on the shipbuilding quality is added, so that the production is mainly carried out domestically by high-level workers, which brings bottlenecks to large-scale production. The automatic and intelligent production capacity of the thin plate in the shipyard is improved, the construction time and the workload of workers are saved to the maximum extent, the promotion speed of intellectualization in the shipyard is facilitated, the advanced manufacturing level in China is improved, and basic services are provided for tourism economy, national defense equipment and the like. The jointed boards of the hull plane plates are butted, the long-distance welding seams of the jointed boards are very suitable for production line operation, but the production line of a shipyard cannot be similar to an automobile production line, the streamlined operation is completely realized, the plate thickness specifications of the jointed boards are greatly different due to different ship shapes or different parts of the same ship hull, the production line of the shipyard needs to be suitable for the assembling and welding processing of steel plates with various thicknesses, the jointed boards for thin plates need to be compatible with thick plates, and otherwise, the production efficiency cannot be fully improved.

Submerged arc welding, MIG or MAG arc welding methods are generally adopted in the steel plate butt welding of the shipyard in the prior art, the linear energy is large, the welding productivity is low, the defects of sensitivity to the defects of thick plates, difficulty in controlling the deformation of thin plates, reduction of joint performance and the like exist, and the modern shipbuilding requirements are difficult to adapt to no matter on the welding quality or speed.

Disclosure of Invention

The invention aims to provide a shipyard thin plate jointed plate butt-joint laser composite welding system aiming at the defects of the prior art, which adopts a hull thin plate welding system combining laser welding and MIG welding, integrates the integration of thin plate assembling, milling and welding, has the double advantages of high speed and good heat input quantity, can realize jointed plate butt-joint automatic welding of a single jointed plate with a plane thin plate with the thickness of 14mm, integrates the integration of thin plate assembling, milling and welding, can realize jointed plate butt joint with larger thickness by increasing welding gun and filling quantity, has good compatibility, simple structure and high device integration level, and greatly improves the production efficiency of the shipyard thin plate butt-joint welding.

The purpose of the invention is realized as follows: a laser composite welding system for butt joint of spliced sheets in a shipyard comprises a production line consisting of a conveying device, a feeding platform and a discharging platform, and is characterized in that a laser composite welded plate pressure frame and a control platform thereof are arranged between the feeding platform and the discharging platform, wherein the laser composite welded plate pressure frame consists of an adjustable liner plate and a grounding device arranged between two fixed type door frames, a piano key type pressing unit, a milling device, a recovery system and a welding device; the control platform is connected with the conveying device, the feeding platform, the laser composite welding jointed board pressure frame and the discharging platform, so that the control and supervision of the production line are realized; the conveying device conveys the precut thin plate into a feeding platform through a lifting roller way; the feeding platform pushes the thin plate to the welding station of the laser composite welding jointed plate pressure frame through the clamping frame, and the jointed plate is sent out of the system through the discharging platform after being automatically welded by the welding device, so that automatic line production of jointed plate butt joint is realized.

The welding device consists of a welding frame arranged on the main beam, and a laser composite welding machine, a fifth servo motor, a sixth servo motor and a laser displacement sensor which are loaded on the welding frame, wherein the fifth servo motor adjusts the height of the welding frame to enable the laser composite welding machine to reach a welding station; the sixth servo motor drives the laser composite welding machine on the welding frame to walk along the welding seam; the laser displacement sensor is arranged on the laser composite welding machine to realize welding seam tracking.

The main beam of the fixed portal frame is provided with two clamping arms, two sides of the main beam are respectively provided with a second servo motor and a third servo motor, the clamping arms are driven to move along the direction of a welding seam and the direction of vertical height, and the main beam is driven by the first servo motor to move on the fixed portal frame along the flow direction of a production line; the clamping arm is L-shaped, and a clamping block controlled by a vision camera and a hydraulic cylinder is arranged on the front arm of the clamping arm.

The adjustable gasket plate and the grounding device are composed of a spiral lifter, a fourth servo motor and a spring grounding electrode which are arranged on the gasket plate.

The milling device and the recovery system are composed of an edge milling machine driven by a first motor and a welding flux/welding slag recovery vehicle driven by a second motor, and a laser displacement sensor for detecting the welding seam quality in real time is arranged on the welding flux/welding slag recovery vehicle.

Compared with the prior art, the invention has the capabilities of integrating thin plate splicing, milling and welding, integrating up/down alignment of steel plates, longitudinal/transverse movement centering, plate thickness difference adjustment, deformation-prevention restriction, plate edge milling and the like, has high speed and good heat input quantity, can realize the thickness of a single spliced plate of 14mm, and can realize the splicing automatic welding of a plane thin plate in the manufacturing and processing process of a plate ship body in a shipyard by increasing the welding gun and the filling quantity on the larger thickness.

Drawings

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

FIG. 2 is a schematic structural view of a pressure frame of a laser composite welding jointed board;

FIG. 3 is a schematic structural view of a fixed gantry;

FIG. 4 is a schematic view of an adjustable pad plate and a grounding device;

FIG. 5 is a schematic view of a milling device and a recycling system;

fig. 6 is a schematic structural view of a welding device.

Detailed Description

Referring to the attached figure 1, the laser composite welding plate pressure frame comprises a conveying device 1, a feeding platform 2, a laser composite welding plate pressure frame 3, a discharging platform 4 and a control platform 5. After the steel plates to be spliced are precut, the steel plates are received from the previous station through a lifting roller way of the conveying device 1 and enter a system, and are sent into a feeding platform 2 through a clamping frame to be pushed to a welding position of a laser composite welding plate pressure frame 3. When the first two boards are tailor-welded under the laser composite welding jigsaw pressure frame 3, the subsequent boards are fed according to the beat and temporarily stored on the feeding platform 2, the board rows which are tailor-welded are conveyed to the discharging platform 4 and the next station by the clamping frame, and the control platform 5 is used for an operator to control and supervise from the side of the production line.

Referring to fig. 2, the laser composite welded plate pressure frame 3 is composed of a fixed portal 31, an adjustable liner plate and grounding device 32, a piano type pressing unit 33, a milling device and recovery system 34 and a welding device 35; the fixed type door frames 31 are two and are arranged in the pit, and are welded and formed after the plates to be spliced are clamped, aligned and milled; the adjustable liner plate and grounding device 32 is arranged below the discharge area gantry and supports the welding seam area of the butt joint plate from the bottom; the piano type pressing unit 33 is arranged on the liner plate, can move horizontally and vertically together with the liner plate, presses the plate edge from the upper parts of the two sides of the welding line after the position is in place, ensures uniform stress on the whole length of the welding line and effectively reduces the deformation after welding; the milling device and the recovery system 34 are arranged in the pit and positioned between the two door frames, and are used for milling the plate edges to be butt-welded, so that the plate seam precision requirement required by laser welding is ensured, and meanwhile, chips, welding flux, welding slag and the like can be recovered; the welding device 35 is arranged above the adjustable liner plate and grounding device 32 and the piano type pressing unit 33, integrates a welding device combining laser and MAG, is close to the milling device, and completes laser composite welding and laser composite + MAG welding of the connected plates.

Referring to fig. 3, two clamping arms 312 are disposed on a main beam 311 of the fixed gantry 31, a second servo motor 314 and a third servo motor 315 are disposed on two sides of the main beam, respectively, and drive the clamping arms 312 to move along a welding seam direction and a vertical height direction, and the main beam 311 is moved on the fixed gantry 31 along a production line flow direction by a first servo motor 313; the clamping arm 312 is L-shaped, and a clamping block 318 controlled by a vision camera 316 and a hydraulic cylinder 317 is arranged on the front arm of the clamping arm; the clamping arms 312 can push plates, after the plates to be welded enter a working area in the laser composite welding jointed plate pressure frame 3, the servo motor 313 for controlling the main beam 311 to move along the flow direction of a production line, the servo motor 314 for controlling the two clamping arms 312 to move along the welding line direction and the servo motor 315 for controlling the two clamping arms 312 to move along the vertical height direction can be quickly started, the two clamping arms 312 are driven to move, the plates are photographed through the vision camera 316 arranged at the front end of the clamping arms 312, modeling is carried out in the system and compared with a database, the position is judged by extracting coordinates of four angular points of the plates, the thickness is judged by extracting coordinates of the upper surfaces of the plates, and the welding line centering adjustment and the vertical adjustment size can be automatically calculated after measurement is completed. Then the clamping arm 312 stops at the corresponding position, the clamping block 318 is controlled by the hydraulic cylinder 317 on the front arm to clamp the plate, the plate is driven by the first servo motor 313 to push or pull the plate to the edge milling position, and welding is completed after edge milling. The horizontal centering adjustment and the vertical height difference adjustment of the plate during edge milling and welding are realized by controlling the second servo motor 314 and the third servo motor 315.

Referring to fig. 4, the adjustable pad and ground device 32 is composed of a spiral lifter 321, a fourth servo motor 322 and a spring ground electrode 323 provided on a pad plate 324. After the plates are pre-spliced at the edge milling position, the spiral lifter 321 on the adjustable liner plate and grounding device 32 is started to lift the liner plate 324 to the corresponding position to support the plates, meanwhile, the piano type pressing unit 33 presses the plates from the upper side, and the milling device and the recovery system 34 work to mill the edge to be welded. After the edge milling is completed, the fourth servo motor 322 is started to push the plate on one side back to the corresponding welding position, and the welding device 35 works to perform laser composite welding on the two butt-joint plates. During welding, the grounding is realized through the spring grounding electrode 323 arranged between the gaskets, and the electrical safety is guaranteed.

Referring to fig. 5, the milling device and recycling system 34 is composed of an edge milling machine 342 driven by a first motor 341 and a flux/slag recycling vehicle 344 driven by a second motor 343, and the flux/slag recycling vehicle 344 is provided with a laser displacement sensor 345 for detecting the quality of a weld in real time. When the plate is milled, the milling device and recovery system 34 starts the first motor 341 to drive the edge milling machine 342 to mill the edges of the two plates simultaneously, and after the edge milling is completed, the edge milling machine 342 retracts to the end position without affecting the welding. In the welding process, the second motor 343 is in electrical linkage with the welding device 35, on one hand, drives the flux/slag recovery vehicle 344 to recover wastes such as flux and slag, and is used for eliminating laser scattering, and on the other hand, detects the welding seam quality in real time through the laser displacement sensor 345 arranged on the flux/slag recovery vehicle 344.

Referring to fig. 6, the welding device 35 is composed of a welding carriage 352 disposed on the main beam 351, and a laser hybrid welding machine 353, a fifth servo motor 354, a sixth servo motor 355 and a laser displacement sensor 356 which are mounted on the welding carriage 352, wherein the fifth servo motor 354 adjusts the height of the welding carriage 352 to drive the laser hybrid welding machine 353 to reach a proper welding station; the sixth servo motor 355 drives the laser composite welding machine 353 on the welding frame 352 to walk along the welding line, and butt flat welding of two spliced plates is completed; the laser displacement sensor 356 is arranged on the laser hybrid welding machine 353, and the weld tracking is realized through visual detection in the welding process.

The invention has been described in further detail in the foregoing for the purpose of illustration and not of limitation, and the equivalent implementations calculated without departing from the spirit and scope of the inventive concept are intended to be covered by the claims set forth at the end of this patent.

Claims

1. A butt-joint laser composite welding system for thin plate jointed boards in a shipyard comprises a production line consisting of a conveying device, a feeding platform and a discharging platform, and is characterized in that a laser composite welded board pressure frame and a control platform thereof are arranged between the feeding platform and the discharging platform, and the laser composite welded board pressure frame consists of an adjustable liner plate and a grounding device which are arranged between two fixed type door frames, a key type pressing unit, a milling device, a recovery system and a welding device; the control platform is connected with the conveying device, the feeding platform, the laser composite welding jointed board pressure frame and the discharging platform, so that the control and supervision of the production line are realized; the conveying device conveys the precut thin plate into a feeding platform through a lifting roller way; the feeding platform pushes the thin plate to the welding station of the laser composite welding jointed plate pressure frame through the clamping frame, and the jointed plate is sent out of the system through the discharging platform after being automatically welded by the welding device, so that automatic line production of jointed plate butt joint is realized.

2. The butt-joint laser hybrid welding system for the thin plate splicing plates in the shipyard as claimed in claim 1, wherein the welding device is composed of a welding carriage arranged on the main beam, and a laser hybrid welding machine, a fifth servo motor, a sixth servo motor and a laser displacement sensor which are loaded on the welding carriage, and the fifth servo motor adjusts the height of the welding carriage to enable the laser hybrid welding machine to reach a welding station; the sixth servo motor drives the laser composite welding machine on the welding frame to walk along the welding seam; the laser displacement sensor is arranged on the laser composite welding machine to realize welding seam tracking.

3. The laser hybrid welding system for butt joint of jointed sheets and boards in shipyard of claim 1, wherein two clamping arms are installed on the main beam of the fixed gantry, and a second servo motor and a third servo motor are installed on two sides of the main beam to drive the clamping arms to move along the direction of the welding seam and the vertical height direction, and the main beam is moved on the fixed gantry along the flow direction of the production line by the first servo motor; and a clamping block controlled by a vision camera and a hydraulic cylinder is arranged on the front arm of the clamping arm.

4. The laser hybrid welding system for butt joint of shipyard sheets and panels as claimed in claim 1, wherein said adjustable liner plate and grounding means comprises a screw elevator, a fourth servo motor and a spring grounding electrode disposed on the liner plate.

5. The laser hybrid welding system for butt joint of jointed shipyard sheets and boards as claimed in claim 1, wherein said milling device and recovery system is composed of a first motor-driven edge milling machine and a second motor-driven flux/slag recovery vehicle, said flux/slag recovery vehicle being equipped with a laser displacement sensor for real-time detection of the quality of the weld.