Welding workstation for front box and rear box

Abstract

The invention discloses a front and rear box welding workstation, and relates to the technical field of welding fixtures, the front and rear box welding workstation comprises two turnover mechanisms, Y-direction lintel moving mechanisms, an X-direction centering mechanism, a three-direction pressing mechanism and a control unit, the two turnover mechanisms and a pair of welding robots are symmetrically arranged on the ground, each turnover mechanism is provided with one Y-direction lintel moving mechanism, each Y-direction lintel moving mechanism is provided with one X-direction centering mechanism, and each Y-direction lintel moving mechanism is provided with one X-direction centering mechanism. The two ends of the Y-direction lintel moving mechanism are each symmetrically provided with a three-direction pressing mechanism, a connecting beam is arranged between every two adjacent three-direction pressing mechanisms, a U-shaped beam structure is formed, the U-shaped beam structures are used for containing workpieces, the Y-direction lintel moving mechanism can be overturned by 180 degrees through the overturning mechanism, and the Y-direction lintel moving mechanism can be overturned by 180 degrees through the overturning mechanism. All the mechanisms and the welding robot are in communication connection with the control unit. According to the front and rear box welding work station, three-dimensional accurate positioning and pressing of workpieces can be achieved, welding deformation is reduced, the problems that operation is not standard, the size error is large, and the technology is difficult to control are solved, cost is reduced, and work efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling, in particular to a front and rear box welding workstation. Background Art

[0002] The box structure of a dump truck primarily involves box panels, reinforcements, and functional components, which typically require welding of these panels. Traditionally, the production of front and rear box panels, from assembly to welding, is entirely manual. The panels are large, making flipping them over time-consuming, labor-intensive, and difficult. Furthermore, manual assembly and welding procedures can lead to significant workpiece deformation and dimensional errors in the final product, significantly reducing work efficiency and failing to meet customer and market demands.

[0003] With the rapid development of artificial intelligence technology in recent years, more and more traditional jobs have been replaced by robots and artificial intelligence. This field is in urgent need of a front and rear box welding workstation that can improve production efficiency and reduce costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a front and rear box welding workstation to solve the problems existing in the above-mentioned prior art, thereby improving production efficiency and processing accuracy and reducing costs.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a front and rear box welding workstation, comprising a flipping mechanism, a Y-direction lintel moving mechanism, an X-direction centering mechanism, a three-directional clamping mechanism and a control unit, wherein two flipping mechanisms and a pair of welding robots are symmetrically arranged on the ground, each flipping mechanism is provided with a Y-direction lintel moving mechanism, a group of three-directional clamping mechanisms are symmetrically arranged at both ends of the Y-direction lintel moving mechanism, a connecting beam is respectively provided between adjacent three-directional clamping mechanisms to form a U-shaped beam structure, the U-shaped beam structure is used for placing a workpiece, the flipping mechanism can realize 180° flipping of the Y-direction lintel moving mechanism, and the flipping mechanism, the Y-direction lintel moving mechanism, the X-direction centering mechanism and the three-directional clamping mechanism are all communicatively connected to the control unit.

[0007] Preferably, the flipping mechanism is a positioner, the positioner is provided with a turntable, and the turntable is connected to the Y-direction beam moving mechanism.

[0008] Preferably, the Y-axis beam moving mechanism includes a base, a Y-axis moving frame and a screw slider mechanism, the screw slider mechanism is arranged in two groups in parallel and both ends of each screw are rotatably arranged on the base, the sliding nut of the screw slider mechanism is fixedly connected to the Y-axis moving frame and the two Y-axis moving frames can achieve relative movement, one end of each of the screws is connected to a servo motor through a reducer, and each of the Y-axis moving frames is provided with a pair of Y-axis slide rails, and the base is provided with a Y-axis slide groove matching the Y-axis slide rails.

[0009] Preferably, a tooling table is provided at one end of each of the Y-axis movable frames, and the two tooling tables are located in the same horizontal plane, and the three-directional clamping mechanism is provided on each of the tooling tables.

[0010] The y-axis movement mechanism is configured to move the cam member to the upper and lower surfaces of the cam member, and the cam member is configured to move the cam member to the lower surface of the cam member, the cam member being axles connected to the upper and lower surfaces of the cam member, and the cam member being axles connected to the lower and upper surfaces of the cam member.

[0011] Preferably, the three-direction clamping mechanism includes an X-direction clamping mechanism, a Y-direction clamping mechanism and a Z-direction clamping mechanism, and the X-direction clamping mechanism is provided with the Y-direction clamping mechanism and the Z-direction clamping mechanism. The X-direction clamping mechanism can move along the X direction, the Y-direction clamping mechanism can move along the Y direction, and the Z-direction clamping mechanism can move along the Z direction.

[0012] Preferably, the U-shaped beam structure includes an X-direction support beam and two Y-direction support beams, the X-direction support beam is provided with a Z-direction clamping mechanism, the two Y-direction support beams are arranged parallel to the Y-direction crossbeam moving mechanism, and the two ends of the Y-direction support beam are respectively connected to the corresponding X-direction clamping mechanism; the X-direction clamping mechanism includes an X-direction clamping block, which is arranged on the X-direction centering mechanism and located on the outside of the Y-direction support beam.

[0013] Preferably, the top surface of the X-direction pressing block is provided with an inwardly inclined slope, the X-direction pressing block is higher than the upper surface of the Y-direction support beam and is located on the outside of the Y-direction support beam, and several proximity switches are provided on the upper surface of the Y-direction support beam.

[0014] Preferably, the Y-direction clamping mechanism includes a base, a screw slider mechanism and a Y-direction clamping block, the screw slider mechanism is arranged above the base along the Y direction, one end of the screw of the screw slider mechanism is connected to a servo motor through a reducer, and the other end is rotatably arranged on the base, the sliding nut of the screw slider mechanism is also passed through a Y guide rail, the Y guide rail is parallel to the screw and is arranged on the base, and the Y-direction clamping block is arranged on the sliding nut; an X-direction fine-tuning mechanism is arranged between the mounting seat and the base, the X-direction fine-tuning mechanism includes an X-direction moving cylinder and a pair of slide rails, one end of the X-direction moving cylinder is connected to the mounting seat and the other end is connected to the base, a slide groove is provided on the base, and a slide rail is provided on the mounting seat, and the slide rail matches the slide groove.

[0015] Preferably, the Z-direction clamping mechanism includes a screw slider mechanism and a Z-direction clamping block, the screw slider mechanism and guide cylinder are vertically arranged on the mounting seat of the X-direction clamping mechanism, the screw of the screw slider mechanism passes through the guide cylinder and is rotatably arranged at both ends on the guide cylinder, the lower end of the screw is connected to the servo motor through a reducer, the side wall of the guide cylinder is provided with a guide groove, the sliding nut of the screw slider mechanism is connected to a U-shaped bracket, one end of the U-shaped bracket passes through the guide groove, and the other end is connected to the Z-direction clamping block below; the guide cylinder is rotatably arranged on the mounting seat, and the guide cylinder is externally connected to a rotating mechanism, the rotating mechanism includes a steering cylinder, a rack and a gear ring, the top rod of the steering cylinder is connected to the rack, a gear ring is provided on the outer wall of the guide cylinder, and the gear ring can mesh with the rack, the rack is slidably arranged in a transverse groove, and the rack can make the gear ring rotate 90° at a central angle, and the gear ring is located on the inner side of the transverse groove.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The front and rear box welding workstation designed by the present invention can achieve three-dimensional accurate positioning and clamping of the workpiece through the flipping mechanism, Y-axis lintel moving mechanism, X-axis centering mechanism, and three-directional clamping mechanism, reducing welding deformation, thereby solving the problems of non-standard operation, large dimensional error, and difficult process control, and greatly reducing labor costs and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of a front and rear box welding workstation in an embodiment of the present invention;

[0020] Figure 2 The structure diagram of the Y-axis beam moving mechanism in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 3 The structure diagram of the Y-axis beam moving mechanism in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 4 Schematic diagram of the structure of the X-axis centering mechanism in an embodiment of the present invention Figure 1 ;

[0023] Figure 5 Schematic diagram of the structure of the X-axis centering mechanism in an embodiment of the present invention Figure 2 ;

[0024] Figure 6 A schematic diagram of the partial structure of the X-axis centering mechanism in an embodiment of the present invention;

[0025] Figure 7 The structure diagram of the Z-direction pressing mechanism in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 8 The structure diagram of the Z-direction pressing mechanism in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 9 The structure diagram of the Z-direction pressing mechanism in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0028] Figure 10 The structure diagram of the Y-direction pressing mechanism in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 11 The structure diagram of the Y-direction pressing mechanism in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 12 The structure diagram of the Y-direction pressing mechanism in the embodiment of the present invention is shown in FIG. Figure 3 ;

[0031] In the figure: 1-welding robot, 2-positioner, 3-turntable, 4-base, 5-Y-direction moving frame, 6-screw slider mechanism, 7-servo motor, 8-reducer, 9-Y-direction slide rail, 10-Y-direction slide groove, 11-tooling table, 12-X-direction support beam, 13-Y-direction support beam, 14-X-direction clamping block, 15-fixed seat, 16-slide seat, 17-slide block, 18-X-direction slide rail, 19-mounting seat, 20-X-direction moving cylinder, 21-slide rail, 22-proximity switch, 23-pulley transmission mechanism, 24-base, 25-Y-direction clamping block, 26-Y-direction guide rail, 27-guide cylinder, 28-guide groove, 29-Z-direction clamping block, 30-U-shaped bracket, 31-steering cylinder, 32-rack, 33-transverse groove. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] The purpose of the present invention is to provide a front and rear box welding workstation to solve the problems existing in the prior art, thereby improving production efficiency and processing accuracy and reducing costs.

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] Example 1

[0036] like Figures 1 to 12 As shown, in this embodiment, a front and rear box welding workstation is provided, including a flip mechanism, a Y-direction beam moving mechanism, an X-direction centering mechanism, a three-directional clamping mechanism, and a control unit. Two flip mechanisms and a pair of welding robots are symmetrically arranged on the ground. Each flip mechanism is provided with a Y-direction beam moving mechanism. A set of three-directional clamping mechanisms are symmetrically arranged at both ends of the Y-direction beam moving mechanism. A connecting beam is provided between adjacent three-directional clamping mechanisms to form a U-shaped beam structure. The U-shaped beam structure is used to place workpieces. The flip mechanism can achieve 180° flipping of the Y-direction beam moving mechanism. The flip mechanism, the Y-direction beam moving mechanism, the X-direction centering mechanism, the three-directional clamping mechanism, and the welding robot are all communicatively connected to the control unit. In this embodiment, the Y-direction beam moving mechanism and the X-direction centering mechanism can achieve two-dimensional accurate positioning of the front box or the rear box, and the three-directional clamping mechanism is used to clamp the box plate, thereby reducing the movement and welding deformation of the box plate during welding, thereby solving the problems of unstandardized operation, large dimensional error, and difficult process control.

[0037] As an optional solution, the turning mechanism in this embodiment is a positioner, and a turntable 3 is provided on the positioner. The turntable 3 is connected to a Y-direction beam moving mechanism to realize the turning movement of the workpiece.

[0038] As an optional solution, the Y-direction beam moving mechanism in this embodiment includes a base 4, a Y-direction moving frame 5, and a screw slider mechanism. The screw slider mechanism is arranged in two groups in parallel, and both ends of each screw are rotatably arranged on the base 4. The sliding nut of the screw slider mechanism is fixedly connected to the Y-direction moving frame 5, and the two Y-direction moving frames 5 can achieve relative movement. One end of each screw is connected to a servo motor 7 through a reducer, and each Y-direction moving frame 5 is provided with a pair of Y-direction slide rails 9. The base 4 is provided with a Y-direction slide 10 that matches the Y-direction slide rails 9. Among them, the servo motor 7 is connected to the reducer 8, and the output shaft of the reducer 8 is connected to the screw through a coupling, so that the movement speed of the screw is adjustable and the movement accuracy is improved. The two Y-direction beam moving mechanisms move simultaneously to achieve the Y-direction centering of the box plate; the turntable 3 is connected to the base 4. Before loading, the Y-direction beam moving mechanism can be moved to the appropriate position along the Y direction according to the size of the workpiece.

[0039] As an optional solution, in this embodiment, a tooling table 11 is provided at one end of each Y-axis movable frame 5, and the two tooling tables 11 are in the same horizontal plane, so that the two tooling tables 11 can achieve relative movement. A three-directional clamping mechanism is provided on both tooling tables 11, which facilitates the three-dimensional accurate positioning and clamping of the workpiece (front and rear boxes), thereby reducing welding deformation.

[0040] As an optional solution, the X-direction centering mechanism in this embodiment includes a pulley transmission mechanism 23, a screw slider mechanism and a slide 16. A fixed seat 15 is fixedly connected to the workbench 11 of each Y-direction movable frame 5. A servo motor is fixedly connected to the lower portion of the fixed seat 15, and a pair of X-direction slides are provided above the fixed seat 15. A slide 16 is provided above the fixed seat 15, and a pair of X-direction slide rails 18 are provided below the slide 16. The X-direction slides are slidably matched with the X-direction slide rails 18 through sliders 17. A pair of sliders 17 are provided below the slide 16, and the X-direction slides and the sliders 17 are slidably arranged. The servo motor is connected to a reducer, which is connected to the end of the screw of the screw slider mechanism through a pulley transmission mechanism 23. Both ends of the screw are rotatably connected to the fixed seat 15. The sliding nut on the screw is fixedly connected to the lower surface of the slide 16. The screw and the X-direction slide are both arranged along the X-direction. A mounting seat 19 is provided on the slide 16. The four X-direction centering mechanisms move simultaneously to achieve the X-direction centering of the box plate. The mounting seat 19 is connected to the Y-direction support beam 13 of the U-beam structure and the X-direction clamping block 14 of the X-direction clamping mechanism. In addition, the Z-direction clamping mechanism is also fixed on the mounting seat 19.

[0041] As an optional solution, the three-directional clamping mechanism in this embodiment includes an X-direction clamping mechanism, a Y-direction clamping mechanism, and a Z-direction clamping mechanism. The X-direction clamping mechanism is provided with a Y-direction clamping mechanism and a Z-direction clamping mechanism. The X-direction clamping mechanism can move in the X direction, the Y-direction clamping mechanism can move in the Y direction, and the Z-direction clamping mechanism can move in the Z direction. The Z-direction clamping device and the Y-direction clamping device are both fixed to the base 24 of the X-direction clamping mechanism. When the X-direction clamping mechanism moves, it drives both the Y-direction clamping mechanism and the Z-direction clamping mechanism to move in the X direction. When the Y-direction clamping mechanism moves, it drives both the Z-direction clamping mechanism to move in the Y direction. Finally, the Z-direction clamping mechanism is adjusted to move in the Z direction, thereby achieving three-directional clamping of the box plate.

[0042] As an optional solution, the U-shaped beam structure in this embodiment includes an X-axis support beam 12 and two Y-axis support beams 13. A Z-axis clamping mechanism is provided on the X-axis support beam 12. Both Y-axis support beams 13 are arranged parallel to the Y-axis traverse mechanism, and the ends of the Y-axis support beams 13 are connected to the corresponding X-axis clamping mechanisms. The notches in the U-shaped beam structure serve as feed and discharge ports.

[0043] As an optional solution, in this embodiment, the top surface of the X-direction clamping block 14 is provided with an inwardly inclined slope. The X-direction clamping block 14 is higher than the upper surface of the Y-direction support beam 13 and is located on the outside of the Y-direction support beam 13. Several proximity switches 22 are provided on the upper surface of the Y-direction support beam 13 for detecting whether a workpiece is placed.

[0044] As an optional solution, the Y-direction clamping mechanism in this embodiment includes a base 24, a screw slider mechanism and a Y-direction clamping block 25. A screw slider mechanism is arranged above the base 24 along the Y direction. One end of the screw of the screw slider mechanism is connected to a servo motor through a reducer, and the other end is rotatably arranged on the base 24. The sliding nut of the screw slider mechanism is also passed through a Y guide rail 26. The Y guide rail 26 is parallel to the screw and is arranged on the base 24. The Y-direction clamping block 25 is arranged on the sliding nut, and the Y guide rail 26 is used to guide the sliding nut.

[0045] As an optional solution, in this embodiment, an X-direction fine-tuning mechanism is provided between the mounting seat 19 and the base 24. The X-direction fine-tuning mechanism includes an X-direction moving cylinder 20 and a pair of slide rails 21. One end of the X-direction moving cylinder 20 is connected to the mounting seat 19 and the other end is connected to the base 24. A slide groove is provided on the base 24, and a slide rail 21 is provided on the mounting seat 19. The slide rail 21 matches the slide groove. In this embodiment, the Y-direction clamping is achieved by driving the screw rod to rotate by a servo motor, so that the Y-direction clamping block 25 moves along the Y-direction to clamp the workpiece; if the position of the Y-direction clamping mechanism is not suitable (there is a gap in the box plate), fine-tuning can be performed along the X-direction by the X-direction moving cylinder 20.

[0046] As an optional solution, the Z-direction clamping mechanism in this embodiment includes a screw slider mechanism and a Z-direction clamping block 29. A screw slider mechanism and a guide cylinder 27 are vertically arranged on the mounting seat 19 of the X-direction clamping mechanism. The screw of the screw slider mechanism passes through the guide cylinder 27 and both ends are rotatably arranged on the guide cylinder 27. The lower end of the screw is connected to a servo motor through a reducer. A guide groove 28 is vertically provided on the side wall of the guide cylinder 27. The sliding nut of the screw slider mechanism is connected to a U-shaped bracket 30. One end of the U-shaped bracket 30 passes through the guide groove 28 and the other end passes through the guide groove 28. A Z-direction clamping block 29 is connected to the lower part of one end; the guide cylinder 27 is rotatably mounted on the mounting seat 19, and a rotating mechanism is connected to the outside of the guide cylinder 27. The rotating mechanism includes a steering cylinder 31, a rack 32, and a gear ring. The top rod of the steering cylinder 31 is connected to the rack 32, and a gear ring is provided on the outer wall of the guide cylinder 27. The gear ring preferably has arc teeth with a central angle of 90 degrees. The gear ring can mesh with the rack 32. The rack 32 is slidably mounted in a transverse groove 33. The rack 32 can rotate the gear ring 90 degrees. The gear ring is located on the inner side of the transverse groove 33. Among them, the Z-direction clamping mechanism drives the screw to rotate by a servo motor, so that the Z-direction clamping block 29 moves up and down along the Z direction to clamp the workpiece; the Z-direction clamping block 29 drives the rack and gear to rotate through the steering cylinder 31, which can rotate the clamping head 360 degrees. When the workpiece is loaded, the clamping head needs to rotate a certain angle and leave a certain space to avoid interference with the workpiece movement.

[0047] Specifically, in the initial state, the positioner rotates to the original position (horizontal state). Depending on the workpiece (front box or rear box), the Y-axis lintel moving mechanism controls the Y-axis movement of the lintel to the appropriate position; the Y-axis centered servo motor moves the tooling table 11 to the appropriate position, and the fork automatically transports the workpiece to the tooling. The control unit determines whether the workpiece is placed through the proximity switch 22 (according to the computer of the control unit automatically identifying the type of workpiece, some of the X-axis clamping mechanism needs to be activated to move the Y-axis clamping mechanism to the appropriate position) to complete the X-axis positioning; the Y-axis clamping mechanism is controlled to fix the workpiece in the Y-axis, and the Z-axis steering cylinder 31 is controlled to flip the Z-axis clamping block 29 90°. Finally, the Z-axis clamping mechanism is controlled to position the workpiece in the Z-axis, and the positioning and tightening of the front and rear box plates are completed.

[0048] This embodiment enables a workstation to realize precise and rigid automated welding of the front and rear boxes, solving the problems of large dimensional deviations of the front and rear boxes, no standardized operations, and difficult process control, and greatly reduces labor costs and improves work efficiency; the rigid connection structure realizes high-fit and high-precision positioning between the front and rear box plates, prevents deformation after welding, and is suitable for compatible development of a variety of carriages. Carriages of different lengths and widths can be spliced ​​at this workstation, and relying on the high-precision positioning of the servo, the assembly error is greatly reduced, the benchmark is unified, and the process is clarified.

[0049] Example 2

[0050] The specific working process of the front and rear box welding workstation in this embodiment is as follows:

[0051] In step S1, a person manually calls for the required material through the control unit's operating machine. After receiving the command, the stacker crane retrieves the corresponding workpiece from the warehouse (each workpiece has a corresponding code). Before loading the workpiece, the four sets of Y-axis beam moving mechanisms move the Y-axis support beam 13 to the origin position, and the four sets of X-axis clamping mechanisms move the four tooling tables outward to the origin position.

[0052] In step S2, the telescopic fork in the loading mechanism automatically transports the workpiece to the workbench and then automatically retracts. At this time, two sets of proximity switches 22 are used to determine whether the workpiece is placed on the workbench. If not, the subsequent series of clamping and positioning actions will not be performed. If the proximity switch 22 is triggered, it means that a workpiece is detected on the workbench, and then the clamping operation will continue according to the set program.

[0053] S3, the control unit first activates the four groups of X-direction clamping mechanisms simultaneously to position and clamp the workpiece in the X direction, and then activates the four groups of Y-direction clamping mechanisms simultaneously to position and clamp the workpiece in the Y direction (if the Y-direction clamping position is not appropriate, it can be adjusted along the X direction by the X-direction moving cylinder 20); since there are many types of structures of the front and rear boxes, some are square and some have rounded corners, the Y-direction clamping mechanism cannot press on the rounded corners, so the position of the Y-direction clamping mechanism needs to be adjusted by the cylinder.

[0054] S4, 5 groups of Z-direction clamping mechanisms, rotate the Z-direction clamping block 29 90°, and the 5 groups of Z-direction clamping mechanisms work to clamp the workpiece. After the workpiece positioning and clamping are completed, front welding begins; each servo motor has a built-in Hall sensor or torque sensor. The Hall sensor and torque sensor are both communicated with the control unit, so that after the servo motor rotates into place, the control unit can control the motor to automatically stop rotating through sensor data detection.

[0055] After front-side welding is complete, the control unit controls the positioner to rotate 180°, with the workpiece's reverse side facing upward, and reverse welding begins. Once reverse welding is complete, the five Z-clamping mechanisms rotate the Z-clamping block 29 90°, releasing the clamp. The four X-clamping mechanisms and the four Y-clamping mechanisms activate and release the clamps. At this point, the stacker receives a command to remove the workpiece and enter the next cycle. Using a stacker for front and rear box loading and unloading logistics is convenient, labor-saving, and improves work efficiency.

[0056] The front and rear box welding workstation in this embodiment can meet all the positioning, clamping and welding requirements of the front and rear boxes. It can complete the welding of both the front and back surfaces with one clamping, thereby improving work efficiency.

[0057] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A front and rear box welding workstation, characterized by: It includes a flipping mechanism, a Y-direction beam moving mechanism, an X-direction centering mechanism, a three-directional clamping mechanism and a control unit. The two flipping mechanisms and a pair of welding robots are symmetrically arranged on the ground. Each flipping mechanism is provided with a Y-direction beam moving mechanism. A group of three-directional clamping mechanisms are symmetrically arranged at both ends of the Y-direction beam moving mechanism. A connecting beam is respectively provided between adjacent three-directional clamping mechanisms to form a U-shaped beam structure. The U-shaped beam structure is used to place the workpiece. The flipping mechanism can realize 180° flipping of the Y-direction beam moving mechanism. The flipping mechanism, the Y-direction beam moving mechanism, the X-direction centering mechanism and the three-directional clamping mechanism are all communicatively connected to the control unit.

2. The front and rear box welding workstation according to claim 1, characterized in that: The turning mechanism is a positioner, and a turntable is provided on the positioner. The turntable is connected to the Y-direction beam moving mechanism.

3. The front and rear box welding workstation according to claim 1, characterized in that: The Y-axis beam moving mechanism includes a base, a Y-axis moving frame and a screw slider mechanism. The screw slider mechanism is provided with two groups in parallel and both ends of each screw are rotatably provided on the base. The sliding nut of the screw slider mechanism is fixedly connected to the Y-axis moving frame and the two Y-axis moving frames can achieve relative movement. One end of each of the screws is connected to a servo motor through a reducer, and each of the Y-axis moving frames is provided with a pair of Y-axis slide rails. The base is provided with a Y-axis slide groove matching the Y-axis slide rails.

4. The front and rear box welding workstation according to claim 3, characterized in that: A tooling platform is provided at one end of each of the Y-axis movable frames, and the two tooling platforms are located in the same horizontal plane. The three-directional pressing mechanism is provided on each tooling platform.

5. The front and rear box welding workstation according to claim 1, characterized in that: The y-axis direction of the wheelbase is adjusted to the vertical with the help of the guide rails, and the guide rails are connected with the up-down knob of the wheel base to rotate with the guide railss.

6. The front and rear box welding workstation according to claim 5, characterized in that: The three-direction clamping mechanism includes an X-direction clamping mechanism, a Y-direction clamping mechanism and a Z-direction clamping mechanism. The X-direction clamping mechanism is provided with the Y-direction clamping mechanism and the Z-direction clamping mechanism. The X-direction clamping mechanism can move along the X direction, the Y-direction clamping mechanism can move along the Y direction, and the Z-direction clamping mechanism can move along the Z direction.

7. The front and rear box welding workstation according to claim 6, characterized in that: The U-shaped beam structure includes an X-direction support beam and two Y-direction support beams. A Z-direction clamping mechanism is provided on the X-direction support beam. The two Y-direction support beams are arranged parallel to the Y-direction crossbeam moving mechanism, and the two ends of the Y-direction support beam are respectively connected to the corresponding X-direction clamping mechanism; the X-direction clamping mechanism includes an X-direction clamping block, which is arranged on the X-direction centering mechanism and located on the outside of the Y-direction support beam.

8. The front and rear box welding workstation according to claim 6, characterized in that: The top surface of the X-direction pressing block is provided with an inwardly inclined slope. The X-direction pressing block is higher than the upper surface of the Y-direction support beam and is located on the outside of the Y-direction support beam. Several proximity switches are provided on the upper surface of the Y-direction support beam.

9. The front and rear box welding workstation according to claim 6, characterized in that: The Y-direction clamping mechanism includes a base, a screw slider mechanism and a Y-direction clamping block, the screw slider mechanism is arranged above the base along the Y direction, one end of the screw of the screw slider mechanism is connected to a servo motor through a reducer, and the other end is rotatably arranged on the base, the sliding nut of the screw slider mechanism is also passed through a Y guide rail, the Y guide rail is parallel to the screw and is arranged on the base, and the Y-direction clamping block is arranged on the sliding nut; an X-direction fine-tuning mechanism is arranged between the mounting seat and the base, the X-direction fine-tuning mechanism includes an X-direction moving cylinder and a pair of slide rails, one end of the X-direction moving cylinder is connected to the mounting seat, and the other end is connected to the base of the Y-direction clamping mechanism, a slide groove is provided on the base, and a slide rail is provided on the mounting seat, and the slide rail matches the slide groove.

10. The front and rear box welding workstation according to claim 6, characterized in that: The Z-direction clamping mechanism includes a screw slider mechanism and a Z-direction clamping block, and the screw slider mechanism and guide cylinder are vertically arranged on the mounting seat of the X-direction clamping mechanism, the screw of the screw slider mechanism passes through the guide cylinder and is rotatably arranged at both ends on the guide cylinder, the lower end of the screw is connected to the servo motor through a reducer, the side wall of the guide cylinder is vertically provided with a guide groove, the sliding nut of the screw slider mechanism is connected to a U-shaped bracket, one end of the U-shaped bracket passes through the guide groove, and the other end is connected to the Z-direction clamping block below; the guide cylinder is rotatably arranged on the mounting seat, and the guide cylinder is externally connected to a rotating mechanism, and the rotating mechanism includes a steering cylinder, a rack and a gear ring, the top rod of the steering cylinder is connected to the rack, and a gear ring is provided on the outer wall of the guide cylinder, and the gear ring can mesh with the rack, and the rack is slidably arranged in a transverse groove, and the rack can make the gear ring rotate 90° at a central angle, and the gear ring is located on the inner side of the transverse groove.

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