A high-precision and high-efficiency welding device and method for a cylindrical shell and an annular plate with a visual detection function

Abstract

The present invention discloses a high-precision and high-efficiency welding device and method for a cylindrical shell and an annular plate with a visual detection function. The present invention relates to the technical field of welding two annular plates inside a cylindrical shell. It includes a workbench, on which a locking and rotating assembly for locking the cylindrical shell and driving the cylindrical shell to rotate is provided. On both the left and right sides of the locking and rotating assembly, a clamping and welding assembly for clamping the annular plate, positioning the annular plate at a specified position of the cylindrical shell, and welding the annular plate inside the cylindrical shell is provided; a visual detection assembly for detecting whether the cylindrical shell is welded through is arranged between the two clamping and welding assemblies, and the visual detection assembly is located directly above the locking and rotating assembly. The beneficial effects of the present invention are: greatly improving the welding efficiency of the cylindrical shell and the annular plate, greatly improving the welding quality of the cylindrical shell and the annular plate, and greatly reducing the working intensity of workers.

Description

Technical Field

[0001] The present invention relates to the technical field of welding two annular plates inside a cylindrical shell, in particular to a high-precision and high-efficiency welding device and method for a cylindrical shell and an annular plate with a visual inspection function. Background Art

[0002] The structure of the product produced in a certain workshop is as Figures 1 - 2 shown. It includes a cylindrical shell 1, and two annular plates 2 are welded at both the left and right ends inside the cylindrical shell 1. The outer diameter of the annular plate 2 is equal to the inner diameter of the cylindrical shell 1. The two annular plates 2 are symmetric about the left and right of the cylindrical shell 1. Central holes coaxial with the cylindrical shell 1 are provided in the middle of the two annular plates 2. Among them, the structure of the cylindrical shell 1 is as Figures 3 - 4 shown, and the structure of the annular plate 2 is as Figures 5 - 6 shown. This kind of product is mainly used for filling water purification materials, such as granular resin.

[0003] The method for workers in a certain workshop to weld two annular plates 2 inside the cylindrical shell 1 to produce the required product is as follows:

[0004] S1. Take out a cylindrical shell 1 as Figures 3 - 4 shown, place the cylindrical shell 1 flat on the welding table 3 as Figure 7 shown, and ensure that the cylindrical shell 1 is directly below the pressing plate 4 of the pressing mechanism.

[0005] S2. The worker rotates the pressing plate 4 of the pressing mechanism downward so that the pressing plate 4 presses on the top of the cylindrical shell 1, thereby fixing the cylindrical shell 1 between the welding table 3 and the pressing plate 4 as Figure 8 shown.

[0006] S3. The worker takes out an annular plate 2 as Figures 5 - 6 shown, inserts the annular plate 2 into the cylindrical shell 1 from right to left, and adjusts the position of the annular plate 2 to position the annular plate 2 at the specified position of the cylindrical shell 1 as Figure 9 shown.

[0007] S4. The worker extends the welding head 5 of the laser welding machine into the cylindrical shell 1 from right to left, and ensures that the welding head 5 faces the contact position between the annular plate 2 and the cylindrical shell 1, thereby realizing the positioning of the welding head 5 as Figure 10 shown; after positioning, the worker turns on the laser welding machine, and the laser beam emitted by the welding head 5 irradiates the contact position between the annular plate 2 and the cylindrical shell 1, thereby initially welding the annular plate 2 to the cylindrical shell 1; then the worker operates the laser welding machine to make the welding head 5 rotate around the center line of the cylindrical shell 1, and the rotation direction of the welding head 5 is as Figure 10As shown by the arrow, when the welding head 5 rotates 360°, an annular weld scar is formed between the annular plate 2 and the cylindrical shell 1, thus realizing the welding of the first annular plate 2 inside the cylindrical shell 1;

[0008] S5. The worker repeats the operations in steps S3 - S4 once, and the second annular plate 2 can be welded inside the cylindrical shell 1, thus producing the required product. The structure of the produced product is as Figures 1 - 2 shown;

[0009] S6. The worker rotates the pressing plate 4 upward to separate the pressing plate 4 from the product. After separation, the worker stands the product upright to observe whether the cylindrical shell 1 of the product is welded through. If the cylindrical shell 1 of the product is not welded through, the worker transfers the product to the next process; if the cylindrical shell 1 of the product is welded through, the worker scraps the product;

[0010] S7. By repeating the operations in steps S1 - S6 in this way, multiple required products can be continuously produced.

[0011] However, although the method used in the workshop can weld two annular plates 2 inside the cylindrical shell 1, there are still the following technical defects in terms of technology:

[0012] I. In step S3, after the worker inserts the annular plate 2 into the cylindrical shell 1 from right to left, since the annular plate 2 is inside the cylindrical shell 1 and the worker cannot see the position where the annular plate 2 is located, the worker can only measure the distance between the right end face of the annular plate 2 and the right end face of the cylindrical shell 1 with a caliper every time the annular plate 2 is moved until the annular plate 2 is positioned at the specified position of the cylindrical shell 1. It can be seen that it takes a long time to adjust the annular plate 2 in place, thus prolonging the welding time between the annular plate 2 and the cylindrical shell 1 and reducing the welding efficiency of the cylindrical shell 1 and the annular plate 2.

[0013] II. In step S4, when the welding head 5 of the laser welding machine welds the contact position between the annular plate 2 and the cylindrical shell 1, since the annular plate 2 is not fixed, during the welding process, the annular plate 2 moves axially along the cylindrical shell 1, thus causing the welded annular plate 2 not to be at the specified position of the cylindrical shell 1 at all (while the process requires that the welded annular plate 2 be at the specified position of the cylindrical shell 1), thereby reducing the welding quality of the cylindrical shell 1 and the annular plate 2 and further reducing the production quality of the product.

[0014] III. During the entire welding process, two processes are required to weld two annular plates 2 into the cylindrical shell 1 respectively, which takes a long time to complete the welding of one cylindrical shell 1 and two annular plates 2, thus further reducing the welding efficiency of the cylindrical shell 1 and the annular plate 2. In addition, after welding, workers are required to check whether the cylindrical shell 1 of the product is welded through, which increases the working intensity of the workers.

[0015] Therefore, there is an urgent need for a welding device and method that can greatly improve the welding efficiency of the cylindrical shell and the annular plate, greatly improve the welding quality of the cylindrical shell and the annular plate, and greatly reduce the working intensity of the workers. Summary of the Invention

[0016] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-precision and high-efficiency welding device and method for cylindrical shells and annular plates with a visual detection function, which can greatly improve the welding efficiency of cylindrical shells and annular plates, greatly improve the welding quality of cylindrical shells and annular plates, and greatly reduce the working intensity of workers.

[0017] The purpose of the present invention is achieved through the following technical solutions: A high-precision and high-efficiency welding device for cylindrical shells and annular plates with a visual detection function, which includes a workbench. On the workbench, there is a locking and rotating assembly for locking the cylindrical shell and driving the cylindrical shell to rotate. On both the left and right sides of the locking and rotating assembly, there is a clamping and welding assembly for clamping the annular plate, positioning the annular plate at a specified position of the cylindrical shell, and welding the annular plate into the cylindrical shell; Between the two clamping and welding assemblies, there is a visual detection assembly for detecting whether the cylindrical shell is welded through, and the visual detection assembly is located directly above the locking and rotating assembly;

[0018] The clamping and welding assembly on the right side includes a vertical plate fixed on the workbench, a driving motor fixed on the left end face of the vertical plate, a driving gear fixed on the output shaft of the driving motor, and a guide rod horizontally sliding through the vertical plate. The left end of the guide rod is fixed with a moving plate, and on the right end face of the moving plate, there is a rack fixed and extending through the vertical plate to the right, and the rack meshes with the driving gear;

[0019] On the left end face of the moving plate, there is a fixed shaft, and on the left end of the fixed shaft, there is a frame. Inside the frame, a horizontally extending horizontal cylinder is welded. The horizontal cylinder is coaxial with the fixed shaft. Both the left and right ends of the horizontal cylinder are closed. A first motor is fixed on the right closed end of the horizontal cylinder. A circular baffle is welded on the outer cylindrical surface of the horizontal cylinder. Two rectangular slots are opened on the cylindrical surface of the horizontal cylinder on the left side of the circular baffle. Inside the rectangular slots, a bent rod is articulated through a spindle. One end of the bent rod is a round head, and the other end extends into the horizontal cylinder;

[0020] A lead screw extending into the horizontal cylinder is connected to the output shaft of the first motor. A nut is threadedly connected to the lead screw. Both the upper and lower ends of the nut are hinged with connecting rods, and the other ends of the two connecting rods are respectively hinged to the extended ends of the two bent rods.

[0021] The clamping and welding assembly further includes a driven gear rotatably mounted outside the fixed shaft and a second motor fixed to the left end face of the moving plate. A driving gear is mounted on the output shaft of the second motor. The driving gear meshes with the driven gear. A bracket extending leftward is fixed to the left end face of the driven gear. The bracket extends to the right side of the circular baffle, and a welding head disposed obliquely is fixed to the extended end. The welding head is connected to the power supply line of the laser welding machine.

[0022] A conical cylinder is fixed to the left closed end of the horizontal cylinder. The large end face of the conical cylinder is butted against the horizontal cylinder.

[0023] The outer diameter of the horizontal cylinder is equal to the diameter of the central hole of the annular plate.

[0024] A ball bearing is fixed to the outside of the fixed shaft. The driven gear is fixed to the outer ring of the ball bearing.

[0025] Two clamping and welding assemblies are symmetrically arranged about the locking and rotating assembly left and right.

[0026] The locking and rotating assembly includes two frames fixed to the workbench, two rollers rotatably mounted between the two frames, and a servo motor fixed to the left frame. The servo motor is connected to the rotating shaft of the front roller. Locking cylinders are fixed to the outer walls of the two frames. The piston rods of the locking cylinders penetrate through the frames, and locking blocks are fixed to the extended ends.

[0027] The vision detection assembly includes a cross plate fixed between the vertical plates of the two clamping and welding assemblies and a vertical cylinder fixed to the top surface of the cross plate. The piston rod of the vertical cylinder penetrates downward through the cross plate, and a lifting plate is fixed to the extended end. CCD cameras are fixed to both the left and right ends of the lifting plate. Both CCD cameras are vertically arranged and are located directly above the area enclosed by the two rollers.

[0028] The high-precision and high-efficiency welding device further includes a controller, which is electrically connected to the driving motor, the first motor, the second motor, the servo motor, the locking cylinder, the vertical cylinder, and the laser welding machine via signal lines.

[0029] A high-precision and high-efficiency welding method for a cylindrical shell and an annular plate with a vision detection function includes the following steps:

[0030] S1. Locking and fixing the cylindrical shell. The specific operation steps are as follows:

[0031] S11. The worker takes out a cylindrical shell and places it flat within the area enclosed by the two rollers of the locking and rotating assembly. At this time, the cylindrical shell is in contact with both rollers. Meanwhile, the bottom wall of the cylindrical shell is just positioned between the two locking blocks of the locking and rotating assembly. Also, the cylindrical shell is just coaxial with the horizontal cylinders of the two clamping and welding assemblies.

[0032] S12. Control the piston rods of the two locking cylinders of the locking and rotating assembly to extend. The piston rods drive the locking blocks to move towards the bottom wall of the cylindrical shell. When the piston rods of the two locking cylinders are fully extended, the bottom wall of the cylindrical shell is just locked between the two locking blocks, thus achieving the locking and fixing of the cylindrical shell.

[0033] S2. Clamp and fix two annular plates on the horizontal cylinders of the two clamping and welding assemblies respectively. The specific operation steps are as follows:

[0034] S21. Take out an annular plate, slip the annular plate from left to right onto the conical cylinder of the right clamping and welding assembly. Then the worker pushes the annular plate to the right until the annular plate abuts against the circular baffle.

[0035] S22. Control the first motor of the right clamping and welding assembly to start. The first motor drives the lead screw to rotate. The nut sleeve moves leftward along the lead screw. The nut sleeve drives the two connecting rods to move leftward synchronously. The two connecting rods respectively drive the two bent rods to rotate around their respective pins. The round heads of the bent rods rotate out of the rectangular grooves and press on the annular plate. When the first motor runs for the set time, the annular plate is just clamped and fixed between the round heads of the bent rods and the circular baffle, thus achieving the clamping and fixing of the first annular plate on the horizontal cylinder of the right clamping and welding assembly.

[0036] S23. The worker repeats the operations of steps S21 - S22 once, and the second annular plate can be clamped and fixed on the horizontal cylinder of the left clamping and welding assembly, and finally, the two annular plates are respectively clamped and fixed on the horizontal cylinders of the two clamping and welding assemblies.

[0037] S3. Position both annular plates at the designated positions on the cylindrical shell. The specific operation steps are as follows:

[0038] S31. Control the driving motor of the clamping and welding assembly on the right to start. The driving motor drives the driving gear to rotate counterclockwise. The driving gear drives the rack to move leftward. The rack drives the moving plate to move leftward. The moving plate drives the fixed shaft to move leftward. The fixed shaft drives the frame, the horizontal cylinder, and the clamped annular plate to move leftward synchronously. The clamped annular plate gradually inserts into the cylindrical shell from right to left. At the same time, the moving plate also drives the second motor, the bracket, and the welding head to move leftward synchronously. When the driving motor runs to the set time point, the controller controls the driving motor to turn off. At this time, the annular plate is just positioned at the specified position at the right end of the cylindrical shell. At the same time, the welding head of the clamping and welding assembly on the right just faces the contact position between the annular plate and the cylindrical shell.

[0039] S32. The worker controls the driving motor of the clamping and welding assembly on the left to start. The driving motor drives the driving gear to rotate clockwise. The driving gear drives the rack to move rightward. The clamped annular plate gradually inserts into the cylindrical shell from left to right. When the driving motor runs to the set time point, the controller controls the driving motor to turn off. At this time, the annular plate is just positioned at the specified position at the left end of the cylindrical shell. At the same time, the welding head of the clamping and welding assembly on the left just faces the contact position between the annular plate and the cylindrical shell.

[0040] S4. Control the laser welding machines of the two clamping and welding assemblies to start. The laser beams emitted by the welding heads irradiate the contact position between the annular plate and the cylindrical shell, thereby initially welding the annular plate to the cylindrical shell. Then turn on the second motor to start. The second motor drives the driving gear to rotate. The driving gear drives the driven gear to rotate around the axis of the fixed shaft. The driven gear drives the bracket thereon to rotate around the axis of the fixed shaft synchronously. The bracket drives the welding head to rotate synchronously. When the welding head rotates 360°, the controller controls the laser welding machine and the second motor to turn off, thereby realizing the simultaneous welding of the two annular plates inside the cylindrical shell, and finally producing the required product.

[0041] S5. Conduct visual inspection on the surface of the cylindrical shell of the product. The specific operation steps are as follows:

[0042] S51. Control the first motors of the two clamping and welding assemblies to reverse. The bending rods gradually separate from the annular plates of the product. When the first motors run for the set time, the controller controls the first motors to turn off. At this time, the bending rods have re-entered the rectangular grooves. Then control the driving motors of the two clamping and welding assemblies to reverse so that the horizontal cylinders withdraw from the cylindrical shells of the product.

[0043] S52. Control the piston rods of the two locking cylinders of the locking and rotating assembly to retract. The piston rods drive the locking blocks to move away from the bottom wall of the cylindrical shell of the product. At this time, the product is in the detection station of the visual inspection assembly.

[0044] S53. Control the piston rod of the vertical cylinder of the vision detection component to extend downward. The piston rod drives the lifting plate to move downward, and the lifting plate drives the two CCD lenses to move downward synchronously. When the piston rod of the vertical cylinder is fully extended, the two CCD lenses are just directly above the two annular plates of the product.

[0045] S54. Start the servo motor of the locking and rotating component. The servo motor drives the front roller to rotate, and the roller drives the cylindrical shell of the product to rotate around its own axis. During the rotation, the CCD lens detects the surface of the cylindrical shell in real time. If the CCD lens detects that the cylindrical shell of the product is not welded through, the worker transfers the product to the next process. If the cylindrical shell of the product is welded through, the worker scraps the product, thus finally realizing the vision detection of the surface of the cylindrical shell of the product.

[0046] S6. Repeat the operations in steps S1 to S5 in this way, and multiple required products can be continuously produced.

[0047] The present invention has the following advantages: greatly improving the welding efficiency of the cylindrical shell and the annular plate, greatly improving the welding quality of the cylindrical shell and the annular plate, and greatly reducing the working intensity of workers. Description of the Drawings

[0048] Figure 1 Isometric view of the product;

[0049] Figure 2 For Figure 1 Main sectional schematic diagram of

[0050] Figure 3 Isometric view of the cylindrical shell;

[0051] Figure 4 For Figure 3 Main sectional schematic diagram of

[0052] Figure 5 Isometric view of the annular plate;

[0053] Figure 6 For Figure 5 Main sectional schematic diagram of

[0054] Figure 7 Schematic diagram of placing the cylindrical shell flat on the welding table;

[0055] Figure 8 Schematic diagram of fixing the cylindrical shell between the welding table and the pressing plate;

[0056] Figure 9 Schematic diagram of positioning the annular plate at the specified position of the cylindrical shell;

[0057] Figure 10 Schematic diagram of realizing the positioning of the welding head;

[0058] Figure 11 is the structural schematic diagram of the present invention;

[0059] Figure 12 is Figure 11 the main sectional schematic diagram of;

[0060] Figure 13 is the structural schematic diagram of the clamping and welding assembly;

[0061] Figure 14 is Figure 13 the main sectional schematic diagram of;

[0062] Figure 15 is the connection schematic diagram of the horizontal cylinder and the conical cylinder;

[0063] Figure 16 is Figure 15 the main sectional schematic diagram of;

[0064] Figure 17 is the connection schematic diagram of the first motor, the lead screw, the nut sleeve, the connecting rod and the bent rod;

[0065] Figure 18 is the structural schematic diagram of the locking and rotating assembly;

[0066] Figure 19 is Figure 18 the top view of;

[0067] Figure 20 is Figure 18 the main sectional schematic diagram of;

[0068] Figure 21 is the structural schematic diagram of the vision detection component;

[0069] Figure 22 is the schematic diagram of placing the cylindrical shell flat in the area enclosed by the two rollers of the locking and rotating assembly;

[0070] Figure 23 is the schematic diagram of realizing the locking and fixing of the cylindrical shell;

[0071] Figure 24 is the schematic diagram of leaning the annular plate against the circular baffle;

[0072] Figure 25 is the schematic diagram of realizing the clamping and fixing of the first annular plate on the horizontal cylinder of the clamping and welding assembly on the right side;

[0073] Figure 26 is the schematic diagram of positioning the annular plate to the specified position at the right end of the cylindrical shell;

[0074] Figure 27Schematic diagram for the horizontal cylinder to withdraw from the cylindrical shell of the product;

[0075] Figure 28 Schematic diagram for two CCD lenses to be just above the two annular plates of the product;

[0076] In the figure:

[0077] 1 - cylindrical shell, 2 - annular plate, 3 - welding table, 4 - pressing plate, 5 - welding head;

[0078] 6 - workbench, 7 - locking and rotating assembly, 8 - clamping and welding assembly, 9 - vision inspection assembly;

[0079] 10 - vertical plate, 11 - driving motor, 12 - driving gear, 13 - guide rod, 14 - moving plate, 15 - rack; 16 - fixed shaft, 17 - frame, 18 - horizontal cylinder, 19 - first motor, 20 - circular baffle, 21 - rectangular groove, 22 - pin shaft, 23 - bent rod; 24 - lead screw, 25 - nut sleeve, 26 - connecting rod; 27 - driven gear, 28 - second motor, 29 - bracket, 30 - conical cylinder;

[0080] 31 - frame, 32 - roller, 33 - servo motor, 34 - locking cylinder, 35 - locking block;

[0081] 36 - horizontal plate, 37 - vertical cylinder, 38 - lifting plate, 39 - CCD lens. Specific implementation mode

[0082] The following further describes the present invention in conjunction with the accompanying drawings. The protection scope of the present invention is not limited to the following:

[0083] As Figures 11 - 21 shown, a high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a vision inspection function, which includes a workbench 6. A locking and rotating assembly 7 for locking the cylindrical shell 1 and driving the cylindrical shell 1 to rotate is arranged on the workbench 6. Clamping and welding assemblies 8 for clamping the annular plate 2, positioning the annular plate 2 to a specified position of the cylindrical shell 1, and welding the annular plate 2 inside the cylindrical shell 1 are arranged on both the left and right sides of the locking and rotating assembly 7. The two clamping and welding assemblies 8 are symmetrically arranged about the locking and rotating assembly 7; A vision inspection assembly 9 for detecting whether the cylindrical shell 1 is welded through is arranged between the two clamping and welding assemblies 8, and the vision inspection assembly 9 is located directly above the locking and rotating assembly 7.

[0084] The clamping and welding assembly 8 on the right side includes a vertical plate 10 fixed on the workbench 6, a driving motor 11 fixed on the left end face of the vertical plate 10, a driving gear 12 fixed on the output shaft of the driving motor 11, and a guide rod 13 horizontally sliding through the vertical plate 10. A moving plate 14 is fixed at the left end of the guide rod 13. A rack 15 is fixed on the right end face of the moving plate 14 and penetrates through the vertical plate 10 to the right. The rack 15 meshes with the driving gear 12;

[0085] A fixed shaft 16 is fixed on the left end face of the moving plate 14. A frame 17 is fixed at the left end of the fixed shaft 16. A horizontal cylinder 18 extending to the left is welded inside the frame 17. The outer diameter of the horizontal cylinder 18 is equal to the diameter of the central hole of the annular plate 2. A conical cylinder 30 is fixed on the left closed end of the horizontal cylinder 18. The large end face of the conical cylinder 30 is butted against the horizontal cylinder 18. The horizontal cylinder 18 is coaxial with the fixed shaft 16. Both the left and right ends of the horizontal cylinder 18 are closed. A first motor 19 is fixed on the right closed end of the horizontal cylinder 18. A circular baffle 20 is welded on the outer cylindrical surface of the horizontal cylinder 18. Two rectangular grooves 21 are formed on the cylindrical surface of the horizontal cylinder 18 and are located on the left side of the circular baffle 20. A bent rod 23 is hinged in the rectangular groove 21 through a shaft 22. One end of the bent rod 23 is a round head, and the other end extends into the horizontal cylinder 18.

[0086] A lead screw 24 extending into the horizontal cylinder 18 is connected to the output shaft of the first motor 19. A nut 25 is threadedly connected to the lead screw 24. Connecting rods 26 are hinged to the upper and lower ends of the nut 25 respectively. The other ends of the two connecting rods 26 are respectively hinged to the extended ends of the two bent rods 23.

[0087] The clamping and welding assembly 8 further includes a driven gear 27 rotatably installed outside the fixed shaft 16 and a second motor 28 fixed on the left end face of the moving plate 14. A driving gear is installed on the output shaft of the second motor 28. The driving gear meshes with the driven gear 27. A bracket 29 extending to the left is fixed on the left end face of the driven gear 27. The bracket 29 extends to the right side of the circular baffle 20, and a welding head 5 arranged obliquely is fixed on the extended end. The welding head 5 is connected to the power cord of the laser welding machine. A ball bearing is fixed outside the fixed shaft 16. The driven gear 27 is fixed on the outer ring of the ball bearing.

[0088] The locking and rotating assembly 7 includes two frames 31 fixed on the workbench 6, two rollers 32 rotatably installed between the two frames 31, and a servo motor 33 fixed on the left frame 31. The servo motor 33 is connected to the rotating shaft of the front roller 32; Locking cylinders 34 are fixed on the outer walls of the two frames 31. The piston rods of the locking cylinders 34 penetrate through the frames 31, and locking blocks 35 are fixed on the extended ends.

[0089] The visual detection component 9 includes a cross plate 36 fixed between the vertical plates 10 of the two clamping and welding assemblies 8, and a vertical cylinder 37 fixed on the top surface of the cross plate 36. The piston rod of the vertical cylinder 37 penetrates downward through the cross plate 36, and a lifting plate 38 is fixed on the extending end. CCD cameras 39 are fixed on both the left and right ends of the lifting plate 38. Both CCD cameras 39 are vertically arranged and are directly above the area enclosed by the two rollers 32.

[0090] This high-precision and high-efficiency welding device further includes a controller, which is electrically connected to the drive motor 11, the first motor 19, the second motor 28, the servo motor 33, the locking cylinder 34, the vertical cylinder 37, and the laser welding machine through signal lines. Workers can control the extension or retraction of the piston rods of the locking cylinder 34 and the vertical cylinder 37 through the controller. At the same time, they can also control the start or stop of the drive motor 11, the first motor 19, the second motor 28, the servo motor 33, and the laser welding machine, thus facilitating the operation of workers and featuring a high degree of automation.

[0091] A high-precision and high-efficiency welding method for a cylindrical shell and an annular plate with a visual detection function includes the following steps:

[0092] S1. Locking and fixing the cylindrical shell 1, and its specific operation steps are as follows:

[0093] S11. Workers take out a cylindrical shell 1 as shown in Figures 3 - 4 and place the cylindrical shell 1 flat in the area enclosed by the two rollers 32 of the locking and rotating assembly 7, as shown in Figure 22 . At this time, the cylindrical shell 1 is in contact with both rollers 32. At the same time, the bottom wall of the cylindrical shell 1 is just located between the two locking blocks 35 of the locking and rotating assembly 7. At the same time, the cylindrical shell 1 is just coaxial with the horizontal cylinders 18 of the two clamping and welding assemblies 8.

[0094] S12. Control the piston rods of the two locking cylinders 34 of the locking and rotating assembly 7 to extend. The piston rods drive the locking blocks 35 to move towards the bottom wall direction of the cylindrical shell 1. When the piston rods of the two locking cylinders 34 are fully extended, the bottom wall of the cylindrical shell 1 is just locked between the two locking blocks 35, thus realizing the locking and fixing of the cylindrical shell 1, as shown in Figure 23 .

[0095] S2. Clamp and fix the two annular plates 2 on the horizontal cylinders 18 of the two clamping and welding assemblies 8 respectively, and its specific operation steps are as follows:

[0096] S21. Take out an annular plate 2 as shown in Figures 5 - 6 and sleave the annular plate 2 from left to right on the conical cylinder 30 of the right clamping and welding assembly 8. Then the worker pushes the annular plate 2 to the right until the annular plate 2 abuts against the circular baffle 20, asFigure 24 as shown

[0097] S22. Control the first motor 19 of the clamping and welding assembly 8 on the right to start. The first motor 19 drives the lead screw 24 to rotate. The nut sleeve 25 moves leftward along the lead screw 24. The nut sleeve 25 drives the two connecting rods 26 to move leftward synchronously. The two connecting rods 26 respectively drive the two bending rods 23 to rotate around their respective pin shafts 22. The round heads of the bending rods 23 rotate out of the rectangular groove 21 and press on the annular plate 2. When the first motor 19 runs for the set time, the annular plate 2 is just clamped and fixed between the round heads of the bending rods 23 and the circular baffle 20, thus realizing clamping and fixing the first annular plate 2 on the horizontal cylinder 18 of the clamping and welding assembly 8 on the right, as Figure 25 shown

[0098] S23. The worker repeats the operations of steps S21 - S22 once, and the second annular plate 2 can be clamped and fixed on the horizontal cylinder 18 of the clamping and welding assembly 8 on the left, and finally realizes clamping and fixing the two annular plates 2 on the horizontal cylinders 18 of the two clamping and welding assemblies 8 respectively;

[0099] S3. Position both annular plates 2 at the specified positions on the cylindrical shell 1. The specific operation steps are as follows:

[0100] S31. Control the driving motor 11 of the clamping and welding assembly 8 on the right to start. The driving motor 11 drives the driving gear 12 to rotate counterclockwise. The driving gear 12 drives the rack 15 to move leftward. The rack 15 drives the moving plate 14 to move leftward. The moving plate 14 drives the fixed shaft 16 to move leftward. The fixed shaft 16 drives the frame 17, the horizontal cylinder 18 and the clamped annular plate 2 to move leftward synchronously. The clamped annular plate 2 gradually inserts into the cylindrical shell 1 from right to left. At the same time, the moving plate 14 also drives the second motor 28, the bracket 29 and the welding head 5 to move leftward. When the driving motor 11 runs to the set time point, the controller controls the driving motor 11 to turn off. At this time, the annular plate 2 is just positioned at the specified position at the right end of the cylindrical shell 1, as Figure 26 shown, and at the same time, the welding head 5 of the clamping and welding assembly 8 on the right just faces the contact position between the annular plate 2 and the cylindrical shell 1;

[0101] S32. The worker controls the driving motor 11 of the clamping and welding assembly 8 on the left to start. The driving motor 11 drives the driving gear 12 to rotate clockwise. The driving gear 12 drives the rack 15 to move rightward. The clamped annular plate 2 gradually inserts into the cylindrical shell 1 from left to right. When the driving motor 11 runs to the set time point, the controller controls the driving motor 11 to turn off. At this time, this annular plate 2 is just positioned at the specified position at the left end of the cylindrical shell 1, and at the same time, the welding head 5 of the clamping and welding assembly 8 on the left just faces the contact position between the annular plate 2 and the cylindrical shell 1;

[0102] S4. Start the laser welding machine for the two clamping and welding assemblies 8. The laser beam emitted by the welding head 5 irradiates the contact position between the annular plate 2 and the cylindrical shell 1, thereby preliminarily welding the annular plate 2 to the cylindrical shell 1. Then, turn on the second motor 28 to start. The second motor 28 drives the driving gear to rotate. The driving gear drives the driven gear 27 to rotate around the axis of the fixed shaft 16. The driven gear 27 drives the bracket 29 thereon to rotate synchronously around the axis of the fixed shaft 16. The bracket 29 drives the welding head 5 to rotate synchronously. The rotation direction of the welding head 5 is as Figure 26 shown by the solid arrow in the figure; after the welding head 5 rotates 360°, the controller controls the laser welding machine and the second motor 28 to turn off, thereby realizing the simultaneous welding of the two annular plates 2 inside the cylindrical shell 1, and finally producing the required product. The structure of the produced product is as Figures 1 - 2 shown;

[0103] Among them, in step S2, the worker first puts the annular plate 2 on the conical cylinder 30 of the clamping and welding assembly 8, and then pushes the annular plate 2 until the annular plate 2 abuts against the circular baffle 20. Then, control the first motor 19 of the clamping and welding assembly 8 to start, so that the bending rod 23 rotates, and then clamp and fix the annular plate 2 between the round head of the bending rod 23 and the circular baffle 20; in step S3, control the driving motor 11 of the clamping and welding assembly 8 to start, so that the clamped annular plate 2 gradually embeds into the cylindrical shell 1. When the driving motor 11 runs to the set time, the annular plate 2 is just positioned at the specified position of the cylindrical shell 1.

[0104] It can be seen from this that compared with the welding method in the workshop as Figures 7 - 10 shown in the figure, there is no need for workers to frequently adjust the position of the annular plate 2 to position the annular plate 2 at the specified position of the cylindrical shell 1. Instead, the annular plate 2 is positioned at the specified position of the cylindrical shell 1 quickly and in one go, thus greatly shortening the welding time between the annular plate 2 and the cylindrical shell 1, and further greatly improving the welding efficiency of the cylindrical shell 1 and the annular plate 2.

[0105] In addition, in step S4, during the welding process of the welding head 5 that makes a rotational motion at the contact position between the annular plate 2 and the cylindrical shell 1, since the annular plate 2 is always clamped and fixed between the round head of the bending rod 23 and the circular baffle 20, it effectively avoids the axial offset of the annular plate 2 along the cylindrical shell 1, and further ensures that the welded annular plate 2 is always at the specified position of the cylindrical shell 1. It can be seen from this that compared with the welding method in the workshop as Figures 7 - 10 shown in the figure, the welding quality of the cylindrical shell 1 and the annular plate 2 is greatly improved, and further the production quality of the product is greatly improved.

[0106] S5. Conduct visual inspection on the surface of the cylindrical shell 1 of the product. The specific operation steps are as follows:

[0107] S51. Control the first motor 19 of the two clamping and welding assemblies 8 to reverse. The bending rod 23 gradually separates from the annular plate 2 of the product. When the first motor 19 runs for the set time, the controller controls the first motor 19 to turn off. At this time, the bending rod 23 has re-entered the rectangular groove 21. Then control the drive motor 11 of the two clamping and welding assemblies 8 to reverse, so that the horizontal cylinder 18 withdraws from the cylindrical shell 1 of the product, as Figure 27 shown;

[0108] S52. Control the piston rods of the two locking cylinders 34 of the locking and rotating assembly 7 to retract. The piston rods drive the locking blocks 35 to move away from the bottom wall of the cylindrical shell 1 of the product. At this time, the product is at the detection station of the visual inspection assembly 9;

[0109] S53. Control the piston rod of the vertical cylinder 37 of the visual inspection assembly 9 to extend downward. The piston rod drives the lifting plate 38 to move downward, and the lifting plate 38 drives the two CCD lenses 39 to move downward synchronously. When the piston rod of the vertical cylinder 37 is fully extended, the two CCD lenses 39 are just above the two annular plates 2 of the product, as Figure 28 shown;

[0110] S54. Control the servo motor 33 of the locking and rotating assembly 7 to start. The servo motor 33 drives the front roller 32 to rotate, and the roller 32 drives the cylindrical shell 1 of the product to rotate around its own axis. The rotation direction of the cylindrical shell 1 is as Figure 28 shown by the arrow in the figure. During the rotation process, the CCD lens 39 detects the surface of the cylindrical shell 1 in real time. If the CCD lens 39 detects that the cylindrical shell 1 of the product is not welded through, the worker transfers the product to the next process; if the cylindrical shell 1 of the product is welded through, the worker scraps the product, thus finally realizing the visual inspection of the surface of the cylindrical shell 1 of the product;

[0111] S6. Repeat the operations in steps S1 - S5 in this way, and multiple required products can be continuously produced.

[0112] Among them, from steps S1 - S4, it can be seen that through the linkage cooperation of the first motor 19, the drive motor 11 and the second motor 28 of the two clamping and welding assemblies 8 of this welding device, two annular plates 2 can be welded into the cylindrical shell 1 at one time, and thus two products can be produced at one time. It can be seen from this that compared with the welding devices in the workshop, such as Figures 7 - 10The shown welding method does not require workers to weld two annular plates 2 into the cylindrical shell 1 in two separate processes, thus greatly shortening the welding time between the cylindrical shell 1 and the two annular plates 2, and further greatly improving the welding efficiency between the cylindrical shell 1 and the annular plates 2.

[0113] In addition, as can be seen from step S5, after the product is produced, only need to first control the piston rod of the vertical cylinder 37 of the vision detection component 9 to extend downward so that the two CCD lenses 39 are respectively directly above the two annular plates 2 of the product, and then control the servo motor 33 of the locking and rotating component 7 to start, then it can be detected whether the cylindrical shell 1 of the product is welded through. It can be seen that there is no need for workers to observe whether the cylindrical shell 1 of the product is welded through, thus greatly reducing the working intensity of the workers.

Claims

1. A high-precision and high-efficiency welding device for cylindrical shells and annular plates with visual detection function, characterized in that: It includes a workbench (6), on which a locking and rotating assembly (7) for locking the cylindrical shell (1) and driving the cylindrical shell (1) to rotate is provided. On the left and right sides of the locking and rotating assembly (7), there are clamping and welding assemblies (8) for clamping the annular plate (2), positioning the annular plate (2) at a specified position of the cylindrical shell (1), and welding the annular plate (2) inside the cylindrical shell (1). Between the two clamping and welding assemblies (8), a vision inspection assembly (9) for detecting whether the cylindrical shell (1) is welded through is provided, and the vision inspection assembly (9) is located directly above the locking and rotating assembly (7). The clamping and welding assembly (8) on the right side includes a vertical plate (10) fixed on the workbench (6), a driving motor (11) fixed on the left end face of the vertical plate (10), a driving gear (12) fixed on the output shaft of the driving motor (11), and a guide rod (13) horizontally sliding through the vertical plate (10). The left end of the guide rod (13) is fixed with a moving plate (14), and a rack (15) extending rightward through the vertical plate (10) is fixed on the right end face of the moving plate (14). The rack (15) meshes with the driving gear (12). A fixed shaft (16) is fixed on the left end face of the moving plate (14). The left end of the fixed shaft (16) is fixed with a frame (17). A horizontal cylinder (18) extending leftward is welded inside the frame (17). The horizontal cylinder (18) is coaxial with the fixed shaft (16). The left and right ends of the horizontal cylinder (18) are both closed. A first motor (19) is fixed on the right closed end of the horizontal cylinder (18). A circular baffle (20) is welded on the outer cylindrical surface of the horizontal cylinder (18). Two rectangular grooves (21) are provided on the cylindrical surface of the horizontal cylinder (18) on the left side of the circular baffle (20). A bent rod (23) is hinged in the rectangular groove (21) through a spindle (22). One end of the bent rod (23) is a round head, and the other end extends into the horizontal cylinder (18). A lead screw (24) extending into the horizontal cylinder (18) is connected to the output shaft of the first motor (19). A nut sleeve (25) is threadedly connected to the lead screw (24). Connecting rods (26) are hinged to the upper and lower ends of the nut sleeve (25). The other ends of the two connecting rods (26) are respectively hinged to the extending ends of the two bent rods (23). The clamping and welding assembly (8) further includes a driven gear (27) rotatably installed outside the fixed shaft (16), and a second motor (28) fixed on the left end face of the moving plate (14). A driving gear is installed on the output shaft of the second motor (28). The driving gear meshes with the driven gear (27). A bracket (29) extending leftward is fixed on the left end face of the driven gear (27). The bracket (29) extends to the right side of the circular baffle (20), and a tilted welding head (5) is fixed on the extending end. The welding head (5) is connected to the power supply line of the laser welding machine.

2. The high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a visual detection function according to claim 1, characterized in that: A conical cylinder (30) is fixed on the left closed end of the horizontal cylinder (18). The large end face of the conical cylinder (30) is butted against the horizontal cylinder (18).

3. The high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a visual detection function according to claim 2, wherein: The outer diameter of the horizontal cylinder (18) is equal to the diameter of the central hole of the annular plate (2).

4. The high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a visual detection function according to claim 3, characterized in that: A ball bearing is fixedly installed outside the fixed shaft (16), and the driven gear (27) is fixedly installed on the outer ring of the ball bearing.

5. The high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a visual detection function according to claim 4, characterized in that: The two clamping and welding assemblies (8) are symmetrically arranged on the left and right with respect to the locking and rotating assembly (7).

6. The high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a visual detection function according to claim 5, characterized in that: The locking and rotating assembly (7) includes two frames (31) fixedly installed on the workbench (6), two rollers (32) rotatably installed between the two frames (31), and a servo motor (33) fixedly installed on the left frame (31). The servo motor (33) is connected to the rotating shaft of the front roller (32); locking cylinders (34) are fixedly installed on the outer walls of the two frames (31). The piston rods of the locking cylinders (34) penetrate through the frames (31), and locking blocks (35) are fixedly installed on the extending ends.

7. The high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a visual detection function according to claim 6, characterized in that: The vision detection assembly (9) includes a cross plate (36) fixedly installed between the vertical plates (10) of the two clamping and welding assemblies (8), and a vertical cylinder (37) fixedly installed on the top surface of the cross plate (36). The piston rod of the vertical cylinder (37) penetrates downward through the cross plate (36), and a lifting plate (38) is fixedly installed on the extending end. CCD cameras (39) are fixedly installed at the left and right ends of the lifting plate (38); the two CCD cameras (39) are both vertically arranged and are both directly above the area enclosed by the two rollers (32).

8. A high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a visual detection function, characterized in that: This high-precision and high-efficiency welding device further includes a controller, which is electrically connected to the drive motor (11), the first motor (19), the second motor (28), the servo motor (33), the locking cylinder (34), the vertical cylinder (37), and the laser welding machine through signal lines.

9. A high-precision and high-efficiency welding method for a cylindrical shell and an annular plate with a visual detection function, using a high-precision and high-efficiency welding device for a cylindrical shell and an annular plate with a visual detection function as described in claim 8, characterized in that: It includes the following steps: S1. Locking and fixing of the cylindrical shell (1), and the specific operation steps are as follows: S11. A worker takes out a cylindrical shell (1) and places the cylindrical shell (1) flat in the area enclosed by the two rollers (32) of the locking and rotating assembly (7). At this time, the cylindrical shell (1) is in contact with both rollers (32). At the same time, the bottom wall of the cylindrical shell (1) is just between the two locking blocks (35) of the locking and rotating assembly (7). At the same time, the cylindrical shell (1) is just coaxial with the horizontal cylinders (18) of the two clamping and welding assemblies (8). S12. Control the piston rods of the two locking cylinders (34) of the locking and rotating assembly (7) to extend. The piston rods drive the locking blocks (35) to move towards the bottom wall of the cylindrical shell (1). When the piston rods of the two locking cylinders (34) are fully extended, the bottom wall of the cylindrical shell (1) is just locked between the two locking blocks (35), thereby realizing the locking and fixing of the cylindrical shell (1). S2. Clamp and fix the two annular plates (2) on the horizontal cylinders (18) of the two clamping and welding assemblies (8) respectively, and the specific operation steps are as follows: S21. Take out an annular plate (2), sleuth the annular plate (2) from left to right on the conical cylinder (30) of the right clamping and welding assembly (8), and then the worker pushes the annular plate (2) to the right until the annular plate (2) abuts against the circular baffle (20). S22. Start the first motor (19) of the clamping and welding assembly (8) on the right side. The first motor (19) drives the lead screw (24) to rotate. The nut sleeve (25) moves leftward along the lead screw (24). The nut sleeve (25) drives the two connecting rods (26) to move leftward synchronously. The two connecting rods (26) respectively drive the two bending rods (23) to rotate around their respective pin shafts (22). The round heads of the bending rods (23) rotate out of the rectangular groove (21) and press on the annular plate (2). When the first motor (19) runs for the set time, the annular plate (2) is just clamped and fixed between the round head of the bending rod (23) and the circular baffle (20), thus realizing clamping and fixing the first annular plate (2) on the horizontal cylinder (18) of the clamping and welding assembly (8) on the right side; S23. The worker repeats the operations in steps S21 - S22 once, and the second annular plate (2) can be clamped and fixed on the horizontal cylinder (18) of the clamping and welding assembly (8) on the left side, and finally realizes clamping and fixing the two annular plates (2) on the horizontal cylinders (18) of the two clamping and welding assemblies (8) respectively; S3. Position both annular plates (2) at the specified positions on the cylindrical shell (1). The specific operation steps are as follows: S31. Start the drive motor (11) of the clamping and welding assembly (8) on the right side. The drive motor (11) drives the drive gear (12) to rotate counterclockwise. The drive gear (12) drives the rack (15) to move leftward. The rack (15) drives the moving plate (14) to move leftward. The moving plate (14) drives the fixed shaft (16) to move leftward. The fixed shaft (16) drives the frame (17), the horizontal cylinder (18) and the clamped annular plate (2) to move leftward synchronously. The clamped annular plate (2) gradually inserts into the cylindrical shell (1) from right to left. At the same time, the moving plate (14) also drives the second motor (28), the bracket (29) and the welding head (5) to move leftward synchronously. When the drive motor (11) runs to the set time point, the controller controls the drive motor (11) to turn off. At this time, the annular plate (2) is just positioned at the specified position at the right end of the cylindrical shell (1), and at the same time, the welding head (5) of the clamping and welding assembly (8) on the right side just faces the contact position between the annular plate (2) and the cylindrical shell (1); S32. The worker starts the drive motor (11) of the clamping and welding assembly (8) on the left side. The drive motor (11) drives the drive gear (12) to rotate clockwise. The drive gear (12) drives the rack (15) to move rightward. The clamped annular plate (2) gradually inserts into the cylindrical shell (1) from left to right. When the drive motor (11) runs to the set time point, the controller controls the drive motor (11) to turn off. At this time, the annular plate (2) is just positioned at the specified position at the left end of the cylindrical shell (1), and at the same time, the welding head (5) of the clamping and welding assembly (8) on the left side just faces the contact position between the annular plate (2) and the cylindrical shell (1); S4. Start the laser welding machine that controls the two clamping and welding assemblies (8). The laser beam emitted by the welding head (5) irradiates the contact position between the annular plate (2) and the cylindrical shell (1), thereby initially welding the annular plate (2) to the cylindrical shell (1). Then, turn on the second motor (28) to start. The second motor (28) drives the driving gear to rotate. The driving gear drives the driven gear (27) to rotate around the axis of the fixed shaft (16). The driven gear (27) drives the bracket (29) thereon to rotate synchronously around the axis of the fixed shaft (16). The bracket (29) drives the welding head (5) to rotate synchronously. After the welding head (5) rotates 360°, the controller controls the laser welding machine and the second motor (28) to turn off, thus realizing the simultaneous welding of the two annular plates (2) inside the cylindrical shell (1), and finally producing the required product; S5. Conduct visual inspection on the surface of the cylindrical shell (1) of the product. The specific operation steps are as follows: S51. Control the first motor (19) of the two clamping and welding assemblies (8) to reverse. The bending rod (23) gradually separates from the annular plate (2) of the product. When the first motor (19) runs for the set time, the controller controls the first motor (19) to turn off. At this time, the bending rod (23) has re-entered the rectangular groove (21). Then, control the driving motor (11) of the two clamping and welding assemblies (8) to reverse, so that the horizontal cylinder (18) withdraws from the cylindrical shell (1) of the product; S52. Control the piston rods of the two locking cylinders (34) of the locking and rotating assembly (7) to retract. The piston rods drive the locking blocks (35) to move away from the bottom wall of the cylindrical shell (1) of the product. At this time, the product is at the detection station of the visual inspection assembly (9); S53. Control the piston rod of the vertical cylinder (37) of the visual inspection assembly (9) to extend downward. The piston rod drives the lifting plate (38) to move downward. The lifting plate (38) drives the two CCD cameras (39) to move downward synchronously. When the piston rod of the vertical cylinder (37) is fully extended, the two CCD cameras (39) are just directly above the two annular plates (2) of the product; S54. Control the servo motor (33) of the locking and rotating assembly (7) to start. The servo motor (33) drives the front roller (32) to rotate. The roller (32) drives the cylindrical shell (1) of the product to rotate around its own axis. During the rotation process, the CCD camera (39) detects the surface of the cylindrical shell (1) in real time. If the CCD camera (39) detects that the cylindrical shell (1) of the product is not welded through, the worker transfers the product to the next process; if the cylindrical shell (1) of the product is welded through, the worker scraps the product, thus finally realizing the visual inspection of the surface of the cylindrical shell (1) of the product; S6. Repeat the operations in steps S1 to S5 in this way, and multiple required products can be continuously produced.

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