A bridge-mounted hanging robot arc welding workstation

Abstract

The present invention discloses a bridge-mounted hanging robot arc welding workstation, which includes double-sided tracks, shielding gas cylinders, gantry skeletons, cage ladders, electrical control cabinets, maintenance platforms, MAG welding torch systems, standard robots, safety blocks, traveling automatic lubrication systems, dual motors, switchable tooling fixtures and system control cabinets. This bridge-mounted hanging robot arc welding workstation is convenient and efficient in operation. By coordinating the dual motors, the bridge gantry can move at high speed on the tracks. The motor is controlled by a PLC, enabling the gantry to stay at any position within the travel range with an accuracy of 0.05 mm. When the robot obtains the position of the weld seam and its own position through the PLC, it runs a specific program to complete welding, and can accurately complete the one-time welding of ultra-long parts with millimeter-level accuracy. Workpieces can be loaded by an overhead crane. After being positioned by the fixture, welding can be completed at a speed of 10 mm / s, reducing the labor intensity of workers.

Description

Technical Field

[0001] The present invention relates to the technical field of car body welding in rail transit, and specifically provides a bridge-mounted hanging robot arc welding workstation. Background Technique

[0002] At present, car body welding is all manual welding. All fixtures do not have fixed clamping devices. Instead, jigs are used to complete approximate positioning, and manual welding is carried out. Tools with strong anti-deformation force are required to complete the positioning of the overall assembly and closing, and this is likely to cause a series of problems:

[0003] 1. Poor accuracy. There is no special tooling to complete fixed clamping, and the accuracy of manual welding is poor.

[0004] 2. Low output. Whether it is the movement between welds or the movement of people, it is necessary to move the welding cable and extract sufficient welding materials, and the work efficiency is extremely low.

[0005] 3. Difficult to operate. It is difficult for workers to ensure the welding quality at the millimeter level within a length of more than ten meters. Summary of the Invention

[0006] The purpose of the present invention is to provide a bridge-mounted hanging robot arc welding workstation to solve the problems of poor accuracy, low output, and difficult operation in the existing car body welding in the above-mentioned background technique.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A bridge-mounted hanging robot arc welding workstation includes double-sided tracks, a shielding gas cylinder, a gantry skeleton, a cage ladder, an electric control cabinet, a maintenance platform, a MAG welding torch system, a standard robot, safety blocks, a traveling automatic lubrication system, a double motor, a switchable fixture, and a system control cabinet. The double-sided tracks are installed on the ground, and a gantry skeleton is arranged on the double-sided tracks. A maintenance platform is arranged above the gantry skeleton, and an electric control cabinet and a MAG welding torch system are arranged on the maintenance platform. A standard robot is arranged below the maintenance platform, and a cage ladder is arranged outside the maintenance platform. A shielding gas cylinder is arranged on the left side of the gantry skeleton, and a traveling automatic lubrication system, a double motor, and a system control cabinet are arranged on the right side of the gantry skeleton. Safety blocks are arranged at both ends of the double motor, and the switchable fixture is located directly below the standard robot;

[0008] The switchable tooling fixture includes a Z-axis handle control system, an X-axis handle control system, a Z-axis pallet, an X-axis unit mounting plate, a steel structure support, a Z-axis shaft fixed support, a Y-axis handle control system, a Y-axis fixed support, an X-axis shaft rotating mounting base plate, a Z-axis unit fixture, and an X-axis unit fixture. The Z-axis handle control system, the X-axis handle control system, and the Y-axis handle control system are installed on the steel structure support. The Z-axis handle control system is connected to the Z-axis shaft fixed support, and the Z-axis pallet and the Z-axis unit fixture are installed on the Z-axis shaft fixed support. The X-axis handle control system is connected to the X-axis unit mounting plate and the X-axis shaft rotating mounting base plate, and the X-axis unit fixture is installed on the X-axis unit mounting plate. The Y-axis handle control system is connected to the Y-axis fixed support.

[0009] Preferably, the output ends of the dual motors are meshed with the bilateral tracks through gears.

[0010] Preferably, the system control cabinet is connected to the MAG welding torch system, the standard robot, and the dual motors.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The bridge-mounted hanging robot arc welding workstation is convenient and efficient to operate. By coordinating the dual motors, the bridge gantry can move at high speed on the tracks. The motor is controlled by the PLC, enabling the gantry to stay at any position within the stroke with an accuracy of 0.05 mm. When the robot obtains the position of the weld seam and its own position through the PLC, it runs a specific program to complete the welding, and can accurately complete the one-time welding of ultra-long parts and ensure millimeter-level accuracy. The workpieces can be loaded by a crane. After being positioned by the fixture, the welding can be completed at a speed of 10 mm / s, reducing the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a structural schematic diagram of the present invention;

[0013] Figure 2 is a structural schematic diagram of the switchable tooling fixture of the present invention.

[0014] In the figure: bilateral tracks 1, shielding gas cylinder 2, gantry skeleton 3, cage ladder 4, electric control cabinet 5, maintenance platform 6, MAG welding torch system 7, standard robot 8, safety stop block 9, follow-up automatic lubrication system 10, dual motors 11, switchable tooling fixture 12, Z-axis handle control system 1201, X-axis handle control system 1202, Z-axis pallet 1203, X-axis unit mounting plate 1204, steel structure support 1205, Z-axis shaft fixed support 1206, Y-axis handle control system 1207, Y-axis fixed support 1208, X-axis shaft rotating mounting base plate 1209, Z-axis unit fixture 1210, X-axis unit fixture 1211, system control cabinet 13. DETAILED DESCRIPTION OF THE INVENTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] Please refer to Figure 1-2 , the present invention provides a technical solution: a bridge-mounted hanging robot arc welding workstation, including double-sided tracks 1, shielding gas cylinders 2, gantry frames 3, cage ladders 4, electrical control cabinets 5, maintenance platforms 6, MAG welding torch systems 7, standard robots 8, safety blocks 9, follow-up automatic lubrication systems 10, double motors 11, switchable tooling fixtures 12, and system control cabinets 13. The double-sided tracks 1 are installed on the ground, and a gantry frame 3 is arranged on the double-sided tracks 1. A maintenance platform 6 is arranged above the gantry frame 3, and an electrical control cabinet 5 and a MAG welding torch system 7 are arranged on the maintenance platform 6. A standard robot 8 is arranged below the maintenance platform 6, and a cage ladder 4 is arranged outside the maintenance platform 6. A shielding gas cylinder 2 is arranged on the left side of the gantry frame 3, and a follow-up automatic lubrication system 10, double motors 11, and a system control cabinet 13 are arranged on the right side of the gantry frame 3. Safety blocks 9 are arranged at both ends of the double motors 11. The switchable tooling fixture 12 is located directly below the standard robot 8. The output ends of the double motors 11 are meshed with the double-sided tracks 1 through gears. The system control cabinet 13 is connected to the MAG welding torch system 7, the standard robot 8, and the double motors 11 for control.

[0017] The switchable tooling fixture 12 includes a Z-direction handle control system 1201, an X-direction handle control system 1202, a Z-direction pallet 1203, an X-direction unit mounting plate 1204, a steel structure support 1205, a Z-direction shaft fixed support 1206, a Y-direction handle control system 1207, a Y-direction fixed support 1208, an X-direction shaft rotating mounting base plate 1209, a Z-direction unit fixture 1210, and an X-direction unit fixture 1211. The Z-direction handle control system 1201, the X-direction handle control system 1202, and the Y-direction handle control system 1207 are installed on the steel structure support 1205. The Z-direction handle control system 1201 is connected to the Z-direction shaft fixed support 1206, and a Z-direction pallet 1203 and a Z-direction unit fixture 1210 are installed on the Z-direction shaft fixed support 1206. The X-direction handle control system 1202 is connected to the X-direction unit mounting plate 1204 and the X-direction shaft rotating mounting base plate 1209, and an X-direction unit fixture 1211 is installed on the X-direction unit mounting plate 1204. The Y-direction handle control system 1207 is connected to the Y-direction fixed support 1208.

[0018] Among them, the bilateral tracks 1 adopt a rack and pinion drive. The two legs of the bridge steel structure carry gears that rest on the racks. The safety blocks 9 are the blocks at the ends of the 4 tracks. The dual motors 11 already have over-travel protection. This component is only for safety considerations. The dual motors 11 are controlled by a PLC. The dual motors 11 have the function of synchronous operation. The follow-up automatic lubrication system 10 can make the rack and pinion maintenance-free during their service life. When maintenance personnel maintain the equipment, they only need to pay attention to the lubricating oil interface of the follow-up automatic lubrication system 10. The gantry frame 3 is a bridge-type gantry frame, which has the function of providing working height, provides sufficient accuracy to ensure the operation of the standard robot 8, carries energy, water, electricity, and gas equipment, and provides a site for manual debugging. The protective gas cylinder 2 contains inert gas, generally a mixed protective gas of carbon dioxide and argon. The cage ladder 4 ensures that workers can safely reach the maintenance platform 6. The standard robot 8 is hung upside down at the bottom of the gantry frame 3, so that the standard robot 8 will have higher accessibility. The switchable tooling fixture 12 offers many types of fixtures for the owner to choose from. It can be a fully automatic clamping fixture or a workbench clamp. The system control cabinet 13 can be used by people to start and stop the system, manually control the low-speed debugging operation and high-speed operation of the system.

[0019] During operation, workers put the workpiece into the switchable tooling fixture 12 by means of a crane or manual loading. Workers press the start button through the system control cabinet 13. The system starts, and the gantry frame 3 starts to move to the designated position of the standard robot 8 for welding. After welding is completed, the gantry frame 3 moves back to the original position, vacating the fixture and the workpiece. The chuck of the fixture automatically opens. Workers lift the workpiece out by crane and then cycle for the next operation. The content not described in detail in this description belongs to the prior art well-known to those skilled in the art.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bridge-mounted hanging robot arc welding workstation, comprising double-sided tracks (1), shielding gas cylinders (2), a gantry framework (3), a cage ladder (4), an electric control cabinet (5), a maintenance platform (6), a MAG welding torch system (7), a standard robot (8), safety blocks (9), a follow-up automatic lubrication system (10), double motors (11), a switchable work fixture (12) and a system control cabinet (13), characterized in that: The bilateral track (1) is installed on the ground, and a gantry frame (3) is arranged on the bilateral track (1). A maintenance platform (6) is arranged above the gantry frame (3), and an electric control cabinet (5) and a MAG welding torch system (7) are arranged on the maintenance platform (6). A standard robot (8) is arranged below the maintenance platform (6), and a cage ladder (4) is arranged outside the maintenance platform (6). A shielding gas cylinder (2) is arranged on the left side of the gantry frame (3), and a follow-up automatic lubrication system (10), a dual motor (11) and a system control cabinet (13) are arranged on the right side of the gantry frame (3). Safety stoppers (9) are arranged at both ends of the dual motor (11). The switchable fixture (12) is located directly below the standard robot (8); The switchable fixture (12) includes a Z-direction handle control system (1201), an X-direction handle control system (1202), a Z-direction pallet (1203), an X-direction unit mounting plate (1204), a steel structure support (1205), a Z-direction shaft fixed support (1206), a Y-direction handle control system (1207), a Y-direction fixed support (1208), an X-direction shaft rotating mounting base plate (1209), a Z-direction unit fixture (1210) and an X-direction unit fixture (1211). The Z-direction handle control system (1201), the X-direction handle control system (1202) and the Y-direction handle control system (1207) are installed on the steel structure support (1205). The Z-direction handle control system (1201) is connected to the Z-direction shaft fixed support (1206), and the Z-direction pallet (1203) and the Z-direction unit fixture (1210) are installed on the Z-direction shaft fixed support (1206). The X-direction handle control system (1202) is connected to the X-direction unit mounting plate (1204) and the X-direction shaft rotating mounting base plate (1209), and the X-direction unit fixture (1211) is installed on the X-direction unit mounting plate (1204). The Y-direction handle control system (1207) is connected to the Y-direction fixed support (1208); The output end of the dual motor (11) is engaged with the bilateral track (1) through a gear.

2. The bridge-mounted hanging robot arc welding workstation according to claim 1, wherein: The system control cabinet (13) is connected to the MAG welding torch system (7), the standard robot (8) and the dual motor (11) for control.

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