Double-station robot workstation for welding small parts

Abstract

The utility model discloses a double-station robot workstation for welding small parts, which comprises a mounting platform, a robot controller, a welding rotary table, a self-centering tool switching chuck, a pressing unit, an industrial robot, a welding mechanism, a station switching rotary table, an operation screen and an integrated working room, the installation platform is arranged at the bottom of the integrated working room, the operation screen is arranged on one side of the integrated working room through a suspension arm, and the robot controller is arranged in the space below a base of the industrial robot on the installation platform. The output end of the robot controller is electrically connected with the input end of the industrial robot, the input end of the welding rotary table, the input end of the welding mechanism, the input end of the in-station air cylinder, the input end of the electromagnetic valve and the input end of the sensor. The welding rotary table and the self-centering tool switching chuck are both arranged on a frame of the station switching rotary table. According to the utility model, the rotation angle of the large rotary table during station switching is reduced, and the distance between the center of the rotary table and the robot is shortened.

Description

Technical Field

[0001] The utility model relates to the relevant field of double-station robot workstations, in particular to a double-station robot workstation for small-piece welding. Background Art

[0002] Robotic automated welding effectively reduces manual labor intensity and the resulting hazards to the human body. Currently, it is widely used in automated manufacturing and processing enterprises, and standard production cells featuring robots equipped with positioners already have a broad application base. With the advent of small desktop welding robots, the welding of traditional small workpieces is gradually evolving from manual and semi-automatic small welding machines to desktop robotic welding mechanisms.

[0003] Compared to traditional welding machines, desktop robots offer the advantage of manually switching welding positions when welding a variety of products, allowing users to jump directly to the appropriate welding posture and position according to a preset program, eliminating the need for tedious adjustments. They can also weld straight lines, curves, and other weld forms that are previously difficult to achieve. Desktop robots are lightweight and compact, making them suitable for use in production workshops with low foundation loads and tight spaces for many small processing companies. Desktop robots allow for the ideal design of integrated welding platforms, and their compact layout allows for easy design of mobile equipment that can be moved as a whole. Furthermore, with the addition of protective fencing, their size can be smaller than that of traditional robot work units, allowing them to be manufactured to facilitate access to freight elevators without removing the fencing.

[0004] For example, the authorized patent with publication number CN204545742U (a rotary robot welding processing center) includes a base, a workroom, a positioner, a robot, and an exhaust port. The workroom is fixed on the base, the robot is fixed in the workroom, a notch is provided on one side of the workroom, the shape of the notch matches the shape of the positioner, the positioner is fixed in the notch, and one side of the positioner is located in the workroom and the other side is located outside the workroom. A work table is provided on the positioner, and the exhaust port is located on the side or top of the workroom. The rotary robot welding processing center provided by the utility model can provide a closed welding environment so that harmful gases generated during welding can be centrally processed, thereby reducing environmental pollution in the welding workshop, improving the quality of the welding environment, and improving welding efficiency and quality. In addition, the equipment occupies a small area.

[0005] The articulated serial structure of the desktop robot in the above-mentioned prior art affects the precise trajectory movement, making it impossible for the robot to complete the welding trajectory for small full-circle arc welding by itself. In particular, in the production of argon arc welding and laser welding, it needs to be assisted by the synchronous rotation of the turntable to complete the precise trajectory. Utility Model Content

[0006] The purpose of the present utility model is to provide a dual-station robot workstation for small-part welding, so as to solve the problem that the articulated serial structure of the desktop robot itself proposed in the above-mentioned background technology affects the precise trajectory movement, making it impossible for small full-arc welding to complete the welding trajectory by itself, especially in the production of argon arc welding and laser welding, which requires the assistance of the synchronous rotation of the turntable to complete the precise trajectory.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a dual-station robot workstation for small-part welding, comprising a mounting platform, a robot controller, a welding rotary table, a self-centering tool switching chuck, a clamping unit, an industrial robot, a welding mechanism, a station switching turntable, an operating screen and an integrated workroom, wherein the mounting platform is arranged at the bottom of the integrated workroom, the operating screen is arranged on one side of the integrated workroom through a boom, the robot controller is arranged in the space below the base of the industrial robot on the mounting platform, the output end of the robot controller is electrically connected to the input end of the industrial robot, the welding rotary table, the welding mechanism, the cylinder in the station, the solenoid valve, and the sensor, and the welding rotary table and the self-centering tool switching chuck are both arranged on the frame of the station switching turntable.

[0008] In a further embodiment, the welding rotary table and the self-centering tool switching chuck are both hollow, and the self-centering tool switching chuck is configured as a three-jaw chuck structure.

[0009] In a further embodiment, the pressing unit includes a positioning plate, a cylinder seat, a quick-release pin, a pressing cylinder, a pressing arm, a pressing head and a linear guide rail;

[0010] The cylinder seat and the pressure arm are installed on the frame of the workstation switching turntable through linear guide rails, maintaining a vertical straight line arrangement. The clamping cylinder is arranged on the cylinder seat and connected to the pressure arm. The pressure head is centrally symmetrical with the welding rotary table and the self-centering tooling switching chuck, and is arranged to rotate along the center. The quick-pull pin is inserted into the pin hole on the positioning plate.

[0011] In a further embodiment, the workstation switching turntable includes a frame, a slewing bearing, a hinge shaft, a fisheye bearing, and a hinge cylinder;

[0012] The frame is connected to the mounting platform via a slewing bearing, the hinge cylinder is arranged on the mounting platform, and the fisheye bearing is arranged at the end of the hinge cylinder piston rod and connected to the hinge shaft arranged on the frame.

[0013] In a further embodiment, the maximum rotation radius of the tooling is set to the minimum circumscribed circle diameter of the double workstations, and the rotation dimension of the workstation switching turntable within a range of 90 degrees is set within the maximum rotation radius of the tooling.

[0014] In a further embodiment, the welding rotary table, self-centering tool switching chuck and clamping unit are each provided with two groups, and the two groups of welding rotary tables, self-centering tool switching chucks and clamping units cooperate with each other to complete the clamping and replacement of the tooling and the clamping of the workpiece.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model reduces the rotation angle of the large turntable when switching workstations, shortens the distance between the turntable center and the robot, and can reduce the robot arm span range when selecting the model, adapting to the common arm span use of most current desktop robots. The rotation space of the large turntable is changed from a full circle to a similar oblong, reducing the length direction of the entire fence protection area. The size space improves equipment utilization, the welding workstation is closer to the edge of the isolation fence, and a window can be simply opened for teaching and observation, without the need for personnel to enter the fence for teaching or maintenance work. Welding equipment, electrical control boxes, etc. can be placed under the tooling platform area, making the space layout more compact. The welding workstation is closer to the edge of the isolation fence, and a window can be simply opened for teaching and observation, without the need for personnel to enter the fence for teaching or maintenance work. Welding equipment, electrical control boxes, etc. can be placed under the tooling platform area, making the space layout more compact. There are many implementation forms of the rotating mechanism of about 90 degrees to choose from. A low-cost ordinary cylinder push-pull rotation mechanism can meet actual use needs. With the help of buffering and hard limit, it can achieve the repeatability accuracy requirements. It is also easy to check and adjust. The work splash and arc isolation during welding can be achieved with a simple isolation plate on the turntable. Compared with the sliding door or lifting door structure used for larger welding sizes in fixed double-stations, it is much simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of a double-station robot workstation for small parts welding according to the present invention;

[0018] Figure 2 This is an inside view of the workstation of the utility model;

[0019] Figure 3 This is a schematic diagram of the core structure of the utility model;

[0020] Figure 4 This is an explanation of the size optimization of this utility model.

[0021] In the figure: 1. Installation platform; 2. Robot controller; 3. Welding rotary table; 4. Self-centering tool switching chuck; 5. Clamping unit; 6. Industrial robot; 7. Welding mechanism; 8. Workstation switching turntable; 9. Operation screen; 10. Integrated workroom; 101. Positioning plate; 102. Cylinder seat; 103. Quick-pull pin; 104. Clamping cylinder; 105. Pressing arm; 106. Pressing head; 107. Linear guide; 108. Fisheye bearing; 109. Hinge shaft; 110. Hinge cylinder; 111. Frame; 112. Slewing bearing; 404. Maximum rotation radius of tooling. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] See also Figure 1-4 The utility model provides an embodiment: a double-station robot workstation for small piece welding, comprising a mounting platform 1, a robot controller 2, a welding rotary table 3, a self-centering tool switching chuck 4, a clamping unit 5, an industrial robot 6, a welding mechanism 7, a workstation switching turntable 8, an operation screen 9 and an integrated workroom 10, wherein the mounting platform 1 is arranged at the bottom of the integrated workroom 10, and the operation screen 9 is arranged on one side of the integrated workroom 10 through a boom, the robot controller 2 is arranged in the space below the base of the industrial robot 6 on the mounting platform 1, the output end of the robot controller 2 is electrically connected to the input end of the industrial robot 6, the welding rotary table 3, the welding mechanism 7, the cylinder, the solenoid valve, and the sensor in the station, and the welding rotary table 3 and the self-centering tool switching chuck 4 are both arranged on the frame 111 of the workstation switching turntable 8.

[0024] The installation platform 1 is used to install all equipment, the operation screen 9 is used to intelligently control the equipment, the robot controller 2 is used to control the industrial robot 6, welding rotary table 3, welding mechanism 7, cylinders, solenoid valves and sensors in the station, and the welding rotary table 3 and the station switching turntable 8 are used to perform automatic welding and automatic station switching control.

[0025] Furthermore, the welding rotary table 3 and the self-centering tool switching chuck 4 are both hollow, and the self-centering tool switching chuck 4 is configured as a three-jaw chuck structure. This design facilitates the passage of additional air pipes or signal cables required for the tooling.

[0026] Furthermore, the pressing unit 5 includes a positioning plate 101, a cylinder base 102, a quick-pull pin 103, a pressing cylinder 104, a pressing arm 105, a pressing head 106 and a linear guide 107;

[0027] The cylinder seat 102 and the pressure arm 105 are installed on the frame 111 of the work station switching turntable 8 through a linear guide 107, maintaining a vertical line arrangement. The clamping cylinder 104 is arranged on the cylinder seat 102 and connected to the pressure arm 105. The pressure head 106 is centrally symmetrical with the welding rotary table 3 and the self-centering tool switching chuck 4, and is arranged to rotate along the center. The quick-pull pin 103 is inserted into the pin hole on the positioning plate 101. This set of structure is inserted into the pin hole of the positioning plate 101 through the quick-pull pin 103. According to the height of different clamping products and tooling, the position of the jack is manually switched to adjust the height. The clamping force is applied to the workpiece by pushing out the clamping cylinder 104 to ensure the positioning and fit of the workpiece.

[0028] Furthermore, the station switching turntable 8 includes a frame 111, a slewing bearing 112, a hinge shaft 109, a fisheye bearing 108 and a hinge cylinder 110;

[0029] Frame 111 is connected to mounting platform 1 via slewing bearing 112. Hinge cylinder 110 is mounted on mounting platform 1. Fisheye bearing 108 is located at the end of the piston rod of hinge cylinder 110 and is connected to hinge shaft 109 mounted on frame 111. The extension and retraction of hinge cylinder 110 can pull frame 111 to rotate around the center of slewing bearing 112. In actual use, to ensure the accuracy of angular position, fixed limit stops can be installed at both ends of the frame to limit the angle. If the turntable is relatively large and the frame superstructure is heavy, and a larger hinge cylinder is used, a buffer can be added to reduce impact and extend the service life of the equipment.

[0030] Furthermore, the tooling's maximum rotation radius 404 is set to the minimum circumscribed diameter of the dual-station system. The 90-degree rotation range of the station switching turntable 8 is designed to be within this radius. According to conventional design and planning, the large turntable would complete this radius when rotating 180 degrees. Furthermore, to avoid robot interference, the robot must be positioned outside this rotation range.

[0031] Furthermore, there are two sets of welding rotary tables 3, self-centering tool switching chucks 4 and clamping units 5, and the two sets of welding rotary tables 3, self-centering tool switching chucks 4 and clamping units 5 cooperate with each other to complete the clamping and replacement of the tooling and the clamping of the workpiece.

[0032] Working principle: When in use, all equipment is installed or connected to the installation platform 1. When relocating, the platform can be directly lifted by a forklift or hydraulic truck and moved as a whole without disassembling internal wiring or reassembling, calibrating, etc. Since the entire station is integrated and controlled, through the robot controller 2 industrial robot 6, welding rotary table 3 motor, various drive and control requirements of the cylinder, solenoid valve, and sensor in the station, and bus communication with the welding power supply in the welding mechanism 7, the welding process parameters during production are retrieved, and the two sets of welding rotary tables 3, self-centering tool switching chuck 4 and clamping unit 5 of the workstation are used to cooperate to complete the clamping and replacement of the tooling and the clamping of the workpiece. The welding rotary table 3 cooperates to complete the rotation movement of the tooling and workpiece during the welding production process. Its speed and angle are directly controlled by the robot controller 2, and the tooling fixture can be quickly replaced or directly used as a workpiece. The tooling can choose pneumatic or manual clamping according to the load and budget. The hollow structure of the welding turntable 3 and the self-centering tooling switching chuck 4 can facilitate the passage of additional air pipes or signal cables required for the tooling. The quick-pull pin 103 is inserted into the pin hole of the positioning plate 101. According to the height of different clamping products and tooling, the height can be adjusted by manually switching the position of the jack. The clamping force is applied to the workpiece by pushing out the clamping cylinder 104 to ensure the positioning and fit of the workpiece. The extension and contraction of the hinge cylinder 110 can pull the frame 111 to rotate around the center of the slewing bearing 112. In order to ensure the accuracy of the angular position, fixed limits can be installed at both ends of the frame to limit the angle. When the turntable is relatively large and the upper structure of the frame is heavy, a larger-sized hinge cylinder can be used. A buffer can also be added to reduce the impact and increase the service life of the equipment.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A dual-station robot workstation for small-part welding, comprising a mounting platform (1), a robot controller (2), a welding rotary table (3), a self-centering tool switching chuck (4), a clamping unit (5), an industrial robot (6), a welding mechanism (7), a station switching rotary table (8), an operating screen (9) and an integrated workroom (10), characterized in that: The mounting platform (1) is arranged at the bottom of the integrated workroom (10), the operating screen (9) is arranged on one side of the integrated workroom (10) through a crane arm, the robot controller (2) is arranged in the space below the base of the industrial robot (6) on the mounting platform (1), the output end of the robot controller (2) is electrically connected to the input end of the industrial robot (6), the welding rotary table (3), the welding mechanism (7), the cylinder in the station, the solenoid valve, and the sensor, and the welding rotary table (3) and the self-centering tool switching chuck (4) are both arranged on the frame (111) of the station switching turntable (8).

2. A dual-station robot workstation for small parts welding according to claim 1, characterized in that: The welding rotary table (3) and the self-centering tool switching chuck (4) are both hollow, and the self-centering tool switching chuck (4) is configured as a three-jaw chuck structure.

3. A dual-station robot workstation for small parts welding according to claim 1, characterized in that: The pressing unit (5) comprises a positioning plate (101), a cylinder seat (102), a quick-pull pin (103), a pressing cylinder (104), a pressing arm (105), a pressing head (106) and a linear guide rail (107); The cylinder seat (102) and the pressure arm (105) are mounted on the frame (111) of the station switching turntable (8) via a linear guide rail (107) and are arranged in a vertical line. The pressing cylinder (104) is arranged on the cylinder seat (102) and is connected to the pressure arm (105). The pressure head (106) is centrally symmetrical with the welding rotary table (3) and the self-centering tool switching chuck (4), and is arranged to rotate along the center. The quick-pull pin (103) is inserted into the pin hole on the positioning plate (101).

4. A dual-station robot workstation for small parts welding according to claim 1, characterized in that: The workstation switching turntable (8) includes a frame (111), a slewing bearing (112), a hinge shaft (109), a fisheye bearing (108), and a hinge cylinder (110); The frame (111) is connected to the mounting platform (1) via a slewing bearing (112), the hinge cylinder (110) is arranged on the mounting platform (1), and the fisheye bearing (108) is arranged at the end of the piston rod of the hinge cylinder (110) and connected to the hinge shaft (109) arranged on the frame (111).

5. The dual-station robot workstation for small parts welding according to claim 1, characterized in that: The maximum rotation radius (404) of the tooling is set as the minimum circumscribed circle diameter of the double workstations, and the rotation dimension of the workstation switching turntable (8) within a range of 90 degrees is set within the maximum rotation radius (404) of the tooling.

6. A dual-station robot workstation for small parts welding according to claim 1, characterized in that: The welding rotary table (3), the self-centering tool switching chuck (4) and the pressing unit (5) are each provided with two groups, and the two groups of the welding rotary table (3), the self-centering tool switching chuck (4) and the pressing unit (5) cooperate with each other to complete the clamping and replacement of the tool and the pressing of the workpiece.

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