A side shift frame automatic welding assembly production line

Abstract

This application relates to the field of machining technology, and in particular to an automatic welding and assembly production line for a side-shifting frame. The line includes a feeding device, comprising a first robotic arm for feeding and assembling various workpieces; a pre-positioning device comprising a crossbeam positioning assembly and a vertical beam positioning assembly. The crossbeam positioning assembly includes a first support, a crossbeam cylinder, and a crossbeam baffle, with the cylinder and baffle respectively installed at both ends of the first support along its length, and the piston rod of the cylinder moving towards the baffle. The vertical beam positioning assembly includes a second support, a vertical beam cylinder, and a vertical beam baffle, with the cylinder and baffle respectively installed at both ends of the second support along its length, and the piston rod of the cylinder moving towards the baffle; a spot welding device for spot welding the assembled workpieces; and a circumferential welding device for circumferential welding the spot-welded workpieces. This application effectively reduces misalignment of workpieces during assembly of the side-shifting frame, improving the welding accuracy and quality of the side-shifting frame.

Description

Technical Field

[0001] This application relates to the field of machining technology, and in particular to an automatic welding and assembly production line for a side-shifting frame. Background Technology

[0002] The side shifter is one of the main components of a forklift attachment structure. Its main components include an upper crossbeam, a lower crossbeam, and two vertical beams. In industrial production, the side shifter can be installed on a crane or forklift to connect the forks to the mast body. The forks can slide on the side shifter to move goods from one position to another when transporting them.

[0003] However, in the current traditional side-shifting frame production process, a semi-automated operation mode is still used. Due to the manual operation, the welding accuracy is inevitably affected, and it cannot be guaranteed that the welding robot will place the grasped workpieces neatly. This can easily cause misalignment of the workpieces, resulting in welding deviations, affecting the welding quality of the side-shifting frame, and reducing production efficiency. Summary of the Invention

[0004] To reduce misalignment of workpieces during assembly of the side-shifting frame and improve welding accuracy and quality, this application provides an automated welding and assembly production line for the side-shifting frame, employing the following technical solution:

[0005] An automated welding and assembly production line for a side-shifting frame includes:

[0006] The feeding device (1) includes a first robotic arm (13), which is used to feed and assemble each workpiece;

[0007] A pre-positioning device (2) includes a crossbeam positioning assembly (21) and a vertical beam positioning assembly (22). The crossbeam positioning assembly (21) includes a first bracket (211), a crossbeam cylinder (212), and a crossbeam baffle (213). The crossbeam cylinder (212) and the crossbeam baffle (213) are respectively installed at both ends of the first bracket (211) along its length. The piston rod of the crossbeam cylinder (212) moves toward the crossbeam baffle (213). The vertical beam positioning assembly (22) includes a second bracket (221), a vertical beam cylinder (222), and a vertical beam baffle (223). The vertical beam cylinder (222) and the vertical beam baffle (223) are respectively installed at both ends of the second bracket (221) along its length. The piston rod of the vertical beam cylinder (222) moves toward the vertical beam baffle (223).

[0008] Spot welding device (3), the spot welding device (3) is used to spot weld each assembled workpiece;

[0009] The ring welding device (4) is used to perform ring welding on each workpiece that has been spot welded.

[0010] By adopting the above technical solution, the assembly and welding of the side-shifting frame are achieved through the cooperation of the feeding device, spot welding device, and circumferential welding device. Furthermore, by setting up a pre-positioning device, the upper and lower crossbeams and vertical beams can be pre-positioned before the first robotic arm performs assembly, thereby ensuring accurate assembly of the upper and lower crossbeams and vertical beams. This prevents welding errors caused by component misalignment during welding, optimizes the assembly of each component at the source, reduces the occurrence of misalignment of components during the assembly of the side-shifting frame, and improves the welding and assembly efficiency and quality of the side-shifting frame.

[0011] Preferably, the crossbeam positioning assembly includes a crossbeam tensioning cylinder fixedly connected to the first bracket, the crossbeam tensioning cylinder being located between the crossbeam cylinder and the crossbeam baffle, and the moving direction of the piston rod of the crossbeam tensioning cylinder being perpendicular to the moving direction of the piston rod of the crossbeam cylinder. The vertical beam positioning assembly includes a vertical beam tensioning cylinder fixedly connected to the second bracket, the vertical beam tensioning cylinder being located between the vertical beam cylinder and the vertical beam baffle, and the moving direction of the piston rod of the vertical beam tensioning cylinder being perpendicular to the moving direction of the piston rod of the vertical beam cylinder.

[0012] By adopting the above technical solution, when the first robot arm places the upper and lower crossbeams and the vertical beam on the crossbeam positioning assembly and the vertical beam positioning assembly respectively, the crossbeam cylinder and the crossbeam baffle limit the position of the upper and lower crossbeams in the length direction, the vertical beam cylinder and the vertical beam baffle limit the position of the vertical beam in the length direction, and the crossbeam tensioning cylinder and the vertical beam tensioning cylinder limit the position of the upper and lower crossbeams and the vertical beam in the width direction respectively, thereby achieving the pre-positioning of the upper and lower crossbeams and the vertical beam.

[0013] Preferably, the feeding device further includes a second robotic arm and two feeding turntables. Two feeding turntables are rotatably connected to the two feeding turntables respectively. A motor is fixedly installed inside the feeding turntable, and the output shaft of the motor is fixedly connected to the feeding turntable. A first placement seat and a second placement seat are fixedly installed on the two feeding turntables respectively. The first placement seat includes two fixedly connected first placement plates, and the second placement seat includes two fixedly connected second placement plates. The two first placement plates and the two second placement plates gradually move away from each other from top to bottom to form an inclined surface.

[0014] By adopting the above technical solution, the loading turntable can store as many lifting rings, sliding blocks, hydraulic cylinder supports, and reinforcing ribs as possible, reducing the number of times parts need to be placed manually. The inclined surfaces of the first and second placement plates facilitate the robot arm to firmly grasp parts for loading.

[0015] Preferably, the spot welding device includes a spot welding turntable and a spot welding clamping assembly. The spot welding turntable is installed between the first manipulator and the second manipulator. The spot welding turntable is used to define the placement position of the side-shifting frame. The spot welding clamping assembly includes a first limiting module for limiting the upper crossbeam and the hydraulic cylinder support. The first limiting module includes an upper crossbeam cylinder and a hydraulic cylinder support cylinder assembly fixedly connected to the spot welding turntable. The upper crossbeam cylinder and the hydraulic cylinder support cylinder assembly are respectively located on both sides of the upper crossbeam.

[0016] By adopting the above technical solution, the coordinated arrangement of the spot welding turntable and the spot welding clamping assembly can limit the position of the side-shifting frame, ensuring that the components of the side-shifting frame remain stable and do not shift during spot welding. The first limiting module can simultaneously limit the position of the upper crossbeam and the hydraulic cylinder support. The cylinders of the upper crossbeam and the hydraulic cylinder support are located on both sides of the upper crossbeam, which can apply forces in opposite directions to the upper crossbeam and lock the position of the upper crossbeam.

[0017] Preferably, the hydraulic cylinder support cylinder assembly includes a first hydraulic cylinder support cylinder and a second hydraulic cylinder support cylinder. The piston rod of the first hydraulic cylinder support cylinder is fixedly connected to a first push plate, and the piston rod of the second hydraulic cylinder support cylinder is fixedly connected to a second push plate. The first push plate is fixedly connected to a first connecting rod, and the end of the first connecting rod away from the first push plate is fixedly connected to a second connecting rod. The length directions of the first connecting rod and the second connecting rod are perpendicular to each other, and the second hydraulic cylinder support cylinder is located at the end of the second connecting rod away from the first connecting rod.

[0018] By adopting the above technical solution, the first push plate and the second push plate can clamp the cylinder support and press it against the upper crossbeam. At the same time as clamping the cylinder support, a force is applied to the upper crossbeam in a direction away from the lower crossbeam, which reduces the number of clamping parts and simplifies the device.

[0019] Preferably, the spot welding clamping assembly includes a second limiting module. The second limiting module includes a pushing cylinder, a pushing block, and a reinforcing rib cylinder fixedly connected to the spot welding turntable. The pushing cylinder and the pushing block are respectively located on opposite sides of the vertical beam. The piston rod of the pushing cylinder abuts against the vertical beam and its movement direction is perpendicular to the length direction of the vertical beam. The reinforcing rib cylinder is located in the side shift frame and corresponds one-to-one with the number of reinforcing ribs. The piston rod of the reinforcing rib cylinder is fixedly connected to a reinforcing rib placement column.

[0020] By adopting the above technical solution, the second limiting module can clamp the rectangular frame formed by the side-shifting frame in both the inner and outer directions. That is, the reinforcing rib cylinder can clamp the reinforcing rib at the four corners inside the side-shifting frame, and the cooperation between the pushing cylinder and the pushing block can clamp the side of the side-shifting frame, making the upper and lower crossbeams and vertical beams of the side-shifting frame more stable.

[0021] Preferably, the spot welding clamping assembly includes a third limiting module for pressing the lower crossbeam and the lower slide block seat. The third limiting module includes a lower crossbeam cylinder and a lower slide block seat cylinder fixedly mounted on the spot welding turntable. The piston rod of the lower crossbeam cylinder abuts against the lower crossbeam and its movement direction is perpendicular to the length direction of the lower crossbeam. The piston rod of the lower slide block seat cylinder is fixedly connected to a lower pressure frame, which is located above the lower crossbeam. When the piston rod of the lower slide block seat cylinder retracts, it causes the lower pressure frame to press against the lower slide block seat.

[0022] By adopting the above technical solution, the third limiting module can limit the lower crossbeam and the lower slide block respectively. The piston rod of the lower slide block cylinder drives the lower pressure frame to press against the lower slide block, while the lower pressure frame gives the lower crossbeam a downward pressure, so that the lower crossbeam is pressed against the spot welding turntable.

[0023] Preferably, the piston rod of the lower crossbeam cylinder is fixedly connected to a pull plate, the lower crossbeam is located on the pull plate, and a lower crossbeam stop is fixedly installed on the spot welding turntable, the lower crossbeam stop being located at the end of the lower crossbeam away from the upper crossbeam.

[0024] By adopting the above technical solution, the piston rod of the lower crossbeam cylinder retracts, causing the pulling plate to move, so that the lower crossbeam is pressed against the lower crossbeam stop block, thereby limiting the position of the lower crossbeam.

[0025] Preferably, the circumferential welding device includes a circumferential welding robot, a fixed column, and a circumferential welding frame. The circumferential welding robot is located on the side near the circumferential welding frame and is used to perform circumferential welding on the side-shifting frame. The fixed column is rotatably connected to a first turntable, and a turntable connecting rod is fixedly installed on the first turntable. A second turntable is rotatably connected to both ends of the turntable connecting rod in the length direction, and the second turntable is fixedly connected to the circumferential welding frame.

[0026] By adopting the above technical solution, and through the cooperation of the circumferential welding robot and the circumferential welding frame, the side-shifting frame that has been spot-welded can be circumferentially welded without manual intervention. The first turntable can be set to enable the rotation of the entire circumferential welding frame, so that the circumferential welding and unloading work will not interfere with each other. The second turntable can be set to enable the rotation of the circumferential welding frame to cooperate with the circumferential welding robot to weld the side-shifting frame.

[0027] Preferably, the conveying device includes a transfer bracket, a sliding rod, a gripping frame, and a gripping cylinder. A sliding rail is provided above the transfer bracket, the sliding rod is slidably connected to the sliding rail, the gripping cylinder is fixedly connected to the sliding rod, and the piston rod of the gripping cylinder is fixedly connected to the gripping frame.

[0028] By adopting the above technical solution, the conveying device can transfer and transport the side-shifting frame that has been spot-welded or circumferentially welded, and transfer the side-shifting frame to the circumferential welding turntable or unloading rack.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. By setting up a pre-positioning device, the feeding accuracy of the feeding device is improved, ensuring that the assembly positions of the upper and lower crossbeams and vertical beams are accurate and will not affect the welding work;

[0031] 2. By setting up the spot welding clamping assembly, the various components of the side-shifting frame are clamped, so that the position of the side-shifting frame is limited to the spot welding turntable. This prevents the welding quality from deteriorating and the welding efficiency from decreasing due to displacement, such as missing welds or incorrect welds. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the automatic welding and assembly production line for the side-shifting frame according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the feeding device according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the pre-positioning device according to an embodiment of this application;

[0035] Figure 4 yes Figure 2 Enlarged view of part A;

[0036] Figure 5 This is a schematic diagram of the structure of the cylinder support cylinder assembly in the embodiments of this application;

[0037] Figure 6 yes Figure 2 Enlarged view of part B;

[0038] Figure 7 This is a schematic diagram of the ring welding apparatus according to an embodiment of this application;

[0039] Figure 8 This is a schematic diagram of the conveying device according to an embodiment of this application;

[0040] Figure 9 This is a structural diagram of the side-shifting frame, which is the background technology of this application.

[0041] Explanation of reference numerals in the attached drawings: 1. Feeding device; 11. Palletizing seat; 12. Feeding turntable; 121. Feeding turntable; 122. First placement seat; 1221. First placement plate; 123. Second placement seat; 1231. Second placement plate; 124. Protruding ring; 125. Groove; 126. Protrusion; 127. Clamping post; 128. Clamping strip; 13. First robotic arm; 131. Rotating frame; 1311. Spot welding gun; 132. Adsorption block; 14. Second robotic arm; 2. Pre-positioning device; 21. Crossbeam positioning assembly; 211. First bracket; 212. Crossbeam cylinder; 213. Crossbeam baffle; 214. Crossbeam tensioning cylinder; 2141. First side plate; 22. Vertical beam positioning assembly; 221. Second... 222. Support frame; 223. Vertical beam cylinder; 224. Vertical beam baffle; 225. Vertical beam tensioning cylinder; 2241. Second side plate; 3. Spot welding device; 31. Spot welding turntable; 311. First rotating table; 312. First spot welding area; 313. Second spot welding area; 314. Lower crossbeam stop block; 315. Vertical beam stop block; 316. Push stop block; 317. First through hole; 318. Second through hole; 319. Fixed seat; 33. Baffle; 34. Rotating motor; 35. Placement column; 36. Spot welding clamping assembly; 361. First limit module; 3611. Upper crossbeam cylinder; 3612. Lower pressing cylinder; 36121. First connecting plate; 36122. Lower pressing arm; 3613. Lifting ring cylinder; 3613 1. Lifting ring placement column; 36132. Rotating arm; 36133. Pressure plate; 3614. Hydraulic cylinder support cylinder assembly; 36141. First hydraulic cylinder support cylinder; 36142. First push plate; 36143. First connecting rod; 36144. Second connecting rod; 36145. Second hydraulic cylinder support cylinder; 36146. Second push plate; 362. Second limit module; 3621. Vertical beam pushing cylinder; 3622. Pushing cylinder; 3623. Reinforcing rib cylinder; 3624. Reinforcing rib placement column; 363. Third limit module; 3631. Lower crossbeam cylinder; 3632. Pulling plate; 3633. Lower sliding block cylinder; 3634. Lower pressure frame; 4. Ring welding device; 41. Ring welding robot; 411. Welding torch changer; 42. Ring welding frame; 43. Fixed column; 431. First turntable; 432. Turntable connecting rod; 433. Second turntable; 44. Divider plate; 45. Ring welding clamping assembly; 451. Ring welding positioning cylinder; 452. Inner support positioning cylinder; 453. Rotary clamping cylinder; 5. Unloading rack; 6. Conveying device; 61. Transfer bracket; 611. Sliding rail; 62. Sliding rod; 621. Grabbing cylinder; 63. Grabbing frame; 7. Operating platform; 100. Side shift frame; 1001. Upper crossbeam; 10011. Upper tank; 10012. Lower tank; 1002. Vertical beam; 1003. Lifting ring; 1004. Hydraulic cylinder support; 1005. Lower sliding block seat; 1006. Lower crossbeam. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1 - Appendix Figure 9 This application will be described in further detail.

[0043] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0044] Reference Figure 1 and Figure 9 This application discloses an automatic welding and assembly production line for a side-shifting frame, comprising a long, rectangular operating platform 7 and a loading device 1, a pre-positioning device 2, a spot welding device 3, a circumferential welding device 4, and several unloading racks 5 mounted on the operating platform 7. The loading device 1 is used to transport and assemble the various components of the side-shifting frame 100 before welding. The pre-positioning device 2 is used to adjust and limit the positions of the upper and lower crossbeams and vertical beams 1002 during loading. The spot welding device 3 is used to spot weld the side-shifting frame 100, and the circumferential welding device 4 is used to perform circumferential welding on the spot-welded side-shifting frame 100. The unloading racks 5 are used to batch and centrally place the finished side-shifting frame 100 products. It also includes a conveying device 6 for transferring and conveying the side-shifting frame 100 during the production process.

[0045] Reference Figure 2 and Figure 9Since different side-shifting frames 100 contain different components, in this embodiment, the side-shifting frame 100 also includes a lifting ring 1003, two hydraulic cylinder supports 1004, and two sliding block seats 1005. Therefore, in order to ensure accurate loading of each component of the side-shifting frame 100, the loading device 1 includes a stacking seat 11, a loading turntable 12, a first robotic arm 13, and a second robotic arm 14. The first robotic arm 13 and the second robotic arm 14 are both rotatably connected to the operating platform 7. 14. Multiple palletizing bases 11 are arranged around the first robotic arm 13, and each palletizing base 11 is detachably connected to the operating platform 7. The palletizing bases 11 are used to store the upper crossbeam 1001, lower crossbeam 1006, and vertical beam 1002 to be welded. At least two loading turntables 12 are fixedly connected to the operating platform 7; one is used to store the lifting ring 1003, the hydraulic cylinder support 1004, and the reinforcing rib, and the other is used to store the lower sliding block seat 1005. Two feeding turntables 121 are rotatably connected to the upper part of the feed turntable 12. A motor is fixedly installed inside the feed turntable 12, and the output shaft of the motor is fixedly connected to the feed turntable 121. A first placement seat 122 and a second placement seat 123 are fixedly installed on the two feed turntables 121 respectively. The first placement seat 122 includes two fixedly connected first placement plates 1221, and the second placement seat 123 includes two fixedly connected second placement plates 1231. The inclined surfaces of the first placement plate 1221 are gradually separated from each other from top to bottom. The inclined surface of the first placement plate 1221 is divided into three placement areas for placing the lifting ring 1003, the hydraulic cylinder support 1004 and the reinforcing rib respectively. The three placement areas are respectively provided with a protruding ring 124 for hooking the lifting ring 1003, a groove 125 for placing the hydraulic cylinder support 1004 and a protrusion 126 for defining the position of the reinforcing rib. The second placement plate 1231 is fixedly provided with a locking post 127 and a locking strip 128 for placing the lower sliding block 1005.

[0046] Reference Figure 2 To facilitate loading, a rotating frame 131 is fixedly installed at the end of the first robotic arm 13. An adsorption block 132 is rotatably connected to the end of the rotating frame 131 away from the first robotic arm 13. An adsorption block 132 is rotatably connected to the end of the second robotic arm 14. When loading is required, the first robotic arm 13 drives the adsorption block 132 to grab the parts on the palletizing base 11, and the second robotic arm 14 drives the adsorption block 132 to grab the parts on the loading turntable 12 for handling and assembly. In this application, the adsorption block 132 is shown as a magnetic block.

[0047] Reference Figure 2 and Figure 3The pre-positioning device 2 is located between the palletizing base 11 and the spot welding device 3. The pre-positioning device 2 includes a crossbeam positioning assembly 21 and a vertical beam positioning assembly 22. The crossbeam positioning assembly 21 includes a first bracket 211 fixedly mounted on the operating platform 7. The first bracket 211 is elongated and has a crossbeam cylinder 212 and a crossbeam baffle 213 fixedly mounted at both ends along its length. At least one crossbeam tensioning cylinder 214 is also fixedly mounted on the first bracket 211. The crossbeam tensioning cylinder 214 is located between the crossbeam cylinder 212 and the crossbeam baffle 213. The piston rod of the crossbeam tensioning cylinder 214 is fixedly connected to a first side plate 2141 for limiting the position of the upper and lower crossbeams, and the moving direction of the piston rod of the crossbeam tensioning cylinder 214 is perpendicular to the length direction of the first bracket 211. The vertical beam positioning assembly 22 includes a second bracket 221 fixedly mounted on the operating platform 7. The second bracket 221 is elongated and frame-shaped. A vertical beam cylinder 222 and a vertical beam baffle 223 are fixedly mounted at both ends of the second bracket 221 along its length. At least one vertical beam tensioning cylinder 224 is also fixedly mounted on the second bracket 221. The vertical beam tensioning cylinder 224 is located between the vertical beam cylinder 222 and the vertical beam baffle 223. The piston rod of the vertical beam tensioning cylinder 224 is fixedly connected to a second side plate 2241 for limiting the position of the vertical beam 1002. The moving direction of the piston rod of the vertical beam tensioning cylinder 224 is perpendicular to the length direction of the second bracket 221. The first bracket 211 and the second bracket 221 are arranged parallel to each other. The length of the first bracket 211 is greater than the length of the second bracket 221. When the first robotic arm 13 grabs the upper and lower crossbeams onto the crossbeam positioning assembly 21, the piston rod of the crossbeam cylinder 212 pushes the upper and lower crossbeams toward the first side plate 2141, and the crossbeam tensioning cylinder 214 clamps the upper and lower crossbeams, thereby achieving the pre-positioning of the upper and lower crossbeams. The first robotic arm 13 then grabs the pre-positioned upper and lower crossbeams onto the spot welding device 3. The pre-positioning method of the vertical beam 1002 is the same as that of the crossbeam, and will not be described in detail here.

[0048] Reference Figure 2 and Figure 9A spot welding gun 1311 is detachably connected to the rotating frame 131 of the first robotic arm 13. The spot welding gun 1311 is used to spot weld the various parts of the side-shifting frame 100 after loading. The spot welding device 3 includes a spot welding turntable 31, which is located between the first robotic arm 13 and the second robotic arm 14. The spot welding turntable 31 includes a first rotating platform 311 and a fixed base 319. The fixed base 319 is fixedly mounted on the operating platform 7. The first rotating platform 311 is rotatably connected above the fixed base 319. The first rotating platform 311 can rotate 180 degrees around itself. A baffle 33 is fixedly mounted on the first rotating platform 311, which divides the first rotating platform 311 into a first spot welding area 312 and a second spot welding area 313. The first rotating platform 311 is provided with a placement station for placing the upper and lower crossbeams and the vertical beam 1002. The placement station is located within the first spot welding area 312 and the second spot welding area 313. During loading, the first... A robotic arm 13 sequentially grasps the upper crossbeam 1001, the vertical beam 1002, the lower crossbeam 1006, and the vertical beam 1002, placing them in the first spot welding area 312 on the spot welding turntable 31. The spot welding turntable 31 rotates 180 degrees, causing the first spot welding area 312 to rotate to the position of the second robotic arm 14. The second robotic arm 14 sequentially grasps the lower slide block 1005, the reinforcing rib, the lifting ring 1003, and the hydraulic cylinder support 1004, placing them in the first spot welding area 312. (The last sentence appears to be incomplete and possibly refers to a process involving all components.) After the loading is completed, all parts are fixed in position. At the same time, the first robot arm 13 continues to grab parts in sequence and place them in the second spot welding area 313. The spot welding turntable 31 continues to rotate 180 degrees. The first robot arm 13 performs spot welding on each part in the first spot welding area 312. The second robot arm 14 continues to load parts into the second spot welding area 313. This process is repeated. The two spot welding areas can perform loading and spot welding work at the same time, which improves the efficiency of loading and spot welding.

[0049] Reference Figure 4 and Figure 9To fix the position of the side-shifting frame 100 to be welded, a spot welding clamping assembly 36 is provided on the spot welding turntable 31. The spot welding clamping assembly 36 includes a first limiting module 361, which includes an upper crossbeam cylinder 3611, a lower pressing cylinder 3612, and a lifting ring cylinder 3613 fixedly mounted on the first turntable 311. The upper crossbeam 1001 includes an upper groove 10011 and a lower groove 10012, which are fixedly connected to form an upper crossbeam 1001 with an "S"-shaped cross-section. The upper crossbeam cylinder 3611... At least two cylinders are provided: two upper crossbeam cylinders 3611 are located at the end of the upper crossbeam 1001 away from the lower crossbeam 1006, and the piston rods of both upper crossbeam cylinders 3611 abut against the lower groove 10012, for pushing the upper crossbeam 1001 towards the lower crossbeam 1006; one upper crossbeam cylinder 3611 is located between the upper crossbeam 1001 and the lower crossbeam 1006, for pushing the upper crossbeam 1001 away from the lower crossbeam 1006; the piston rod of the lower cylinder 3612 is fixedly connected to a long strip-shaped first connecting plate 36121. The first connecting plate 36121 has two fixedly connected lower pressure arms 36122 at its two ends along its length. The lower pressure arms 36122 abut against the upper groove 10011 of the upper crossbeam 1001. When the piston rod of the lower pressure cylinder 3612 retracts, it drives the lower pressure arms 36122 to move downward to press the upper crossbeam 1001. The lifting ring cylinder 3613 is located on the side of the upper crossbeam 1001 away from the lower crossbeam 1006. The piston rod of the lifting ring cylinder 3613 is fixedly connected to a lifting ring placement column 36131. ​​A rotating arm 36132 is rotatably connected above the lifting ring placement column 36131. The rotating arm 36132 is fixedly connected to the pressure plate 36133. The first rotating table 311 is fixedly connected to the rotating motor 34. The output shaft of the rotating motor 34 is fixedly connected to the rotating arm 36132. When the lifting ring 1003 is placed in the lifting ring 1003 placement slot, the rotating motor 34 drives the rotating arm 36132 to rotate so that the pressure plate 36133 presses the lifting ring 1003. The piston rod of the lifting ring cylinder 3613 retracts, causing the lifting ring placement column 36131 to move toward the upper crossbeam 1001 so that the lifting ring 1003 abuts against the upper crossbeam 1001.

[0050] Reference Figure 5 and Figure 6Two placement columns 35 for placing the hydraulic cylinder support 1004 are fixedly installed on the first rotating platform 311. The two placement columns 35 are located between the upper crossbeam 1001 and the lower crossbeam 1006. The first rotating platform 311 has four first through holes 317. The spot welding clamping assembly 36 also includes a hydraulic cylinder support cylinder assembly 3614. The hydraulic cylinder support cylinder assembly 3614 is located on the side of the first rotating platform 311 near the fixed base 319. The hydraulic cylinder support cylinder assembly 3614 includes a first hydraulic cylinder support cylinder 36141 and a second hydraulic cylinder support cylinder 36145. The pushing direction of the first hydraulic cylinder support cylinder 36141 is perpendicular to the pushing direction of the second hydraulic cylinder support cylinder 36145. The piston rod of the first hydraulic cylinder support cylinder 36141 is fixedly connected to a first push plate 36142, which passes through a first through hole 317. A first connecting rod 36143 is fixedly connected to the first push plate 36142, and a second connecting rod 36144 is fixedly connected to the end of the first connecting rod 36143 away from the first push plate 36142. The first connecting rod 36143 and the second connecting rod 36144... The length directions are perpendicular to each other. The second hydraulic cylinder support cylinder 36145 is located at the end of the second connecting rod 36144 away from the first connecting rod 36143. The piston rod of the second hydraulic cylinder support cylinder 36145 passes through the second connecting rod 36144 and is fixedly connected to the second push plate 36146. The second push plate 36146 passes through the first through hole 317. The second push plate 36146 is provided with a chamfer to fit the shape of the hydraulic cylinder support 1004. The number of hydraulic cylinder support cylinder assemblies 3614 corresponds one-to-one with the number of hydraulic cylinder supports 1004. When the hydraulic cylinder support is... When 1004 is placed on the placement column 35, the first hydraulic cylinder support cylinder 36141 drives the first push plate 36142 to move toward the second push plate 36146, so that the hydraulic cylinder support 1004 abuts against the first push plate 36142. The second hydraulic cylinder support cylinder 36145 drives the second push plate 36146 to move toward the upper crossbeam 1001, so that the second push plate 36146 abuts against the hydraulic cylinder support 1004, thereby clamping the hydraulic cylinder support 1004 between the first push plate 36142 and the second push plate 36146 and abutting against the upper crossbeam 1001.

[0051] Reference Figure 4 and Figure 5The spot welding clamping assembly 36 includes a second limiting module 362. The second limiting module 362 includes a vertical beam pushing cylinder 3621, a pushing cylinder 3622, and a reinforcing rib cylinder 3623, all fixedly mounted on the first rotating platform 311. Two vertical beam pushing cylinders 3621 are provided, each located at one end of the length of one of the two vertical beams 1002, and both are positioned close to the upper crossbeam 1001. Two vertical beam stops 315 are fixedly mounted on the first rotating platform 311, each located at one end of one of the two vertical beams 1002 away from the vertical beam pushing cylinders 3621. The piston rods of the two vertical beam pushing cylinders 3621 abut against the two vertical beams 1002, pushing the vertical beams 1002 towards the vertical beam stops 315. At least one pushing stop 316 is fixedly mounted on the first rotating platform 311. The pushing cylinders 3622 and the pushing stop 316 are... Located on opposite sides of the two vertical beams 1002, the piston rod of the push cylinder 3622 abuts against one of the vertical beams 1002, pushing the vertical beam 1002 toward the push block 316. The reinforcing rib cylinder 3623 is located on the side of the first rotating platform 311 near the fixed seat 319. The number of reinforcing rib cylinders 3623 corresponds one-to-one with the number of reinforcing ribs. In this application, four reinforcing ribs are shown as an example. The first rotating platform 311 has four second through holes 318, which are located below the four corners of the side shift frame 100. The piston rod of the reinforcing rib cylinder 3623 is fixedly connected to the reinforcing rib placement column 3624. The reinforcing rib placement column 3624 passes through the second through holes 318. When the four reinforcing ribs are placed on the reinforcing rib placement column 3624, the piston rods of the four reinforcing rib cylinders 3623 extend and drive the reinforcing rib placement column 3624 to move, so that the reinforcing ribs abut against the four corners of the side shift frame 100.

[0052] Reference Figure 6 and Figure 9The spot welding clamping assembly 36 also includes a third limiting module 363. The third limiting module 363 includes a lower crossbeam cylinder 3631 and a lower slide block cylinder 3633, which are fixedly mounted on the first rotating table 311. The lower crossbeam cylinder 3631 is located at the end of the lower crossbeam 1006 away from the upper crossbeam 1001. The piston rod of the lower crossbeam cylinder 3631 is fixedly connected to a "U"-shaped pull plate 3632. The lower crossbeam 1006 is located above the pull plate 3632. Two lower crossbeam stops 314 are fixedly mounted on the first rotating table 311. The two lower crossbeam stops 314 are located at both ends of the lower crossbeam cylinder 3631. When the piston rod of the lower crossbeam cylinder 3631 drives the pull plate 3632 to move, The inner wall of the pull plate 3632 abuts against the lower crossbeam 1006. The lower crossbeam cylinder 3631 is used to pull the lower crossbeam 1006 toward the lower crossbeam stop 314. The lower slide block cylinder 3633 is located at the end of the lower crossbeam 1006 away from the upper crossbeam 1001. The piston rod of the lower slide block cylinder 3633 is fixedly connected to the lower pressure frame 3634. The lower pressure frame 3634 is located above the lower crossbeam 1006. When the lower slide block 1005 is placed on the lower crossbeam 1006, the piston rod of the lower slide block cylinder 3633 retracts, causing the lower pressure frame 3634 to move downward to press the lower slide block 1005. The number of lower slide block cylinders 3633 corresponds one-to-one with the number of lower slide blocks 1005.

[0053] Reference Figure 2 and Figure 7 The circumferential welding device 4 includes a circumferential welding robot 41, a fixed column 43, and a circumferential welding frame 42. The circumferential welding robot 41 is rotatably connected to the operating platform 7. The fixed column 43 is fixedly connected to the operating platform 7. A first turntable 431 is rotatably connected to one end of the fixed column 43 away from the operating platform 7. A turntable connecting rod 432 is fixedly installed on the first turntable 431. A second turntable 433 is rotatably connected to both ends of the turntable connecting rod 432 along its length. The second turntable 433 is fixedly connected to the circumferential welding frame 42. A partition plate 44 is fixedly connected to the connecting rod 432, separating the two ring welding frames 42 so that they do not interfere with each other during ring welding and transfer of the side-shifting frame 100. The turntable connecting rod 432 can rotate 360 ​​degrees around the axis of the first turntable 431, and the ring welding frame 42 can rotate 360 ​​degrees around the axis of the second turntable 433. The ring welding robot 41 and the second robot 14 are located on the same side, and a ring welding gun for ring welding the side-shifting frame 100 is fixedly installed at the end of the ring welding robot 41. The number of ring welding frames 42 and ring welding devices 4 is not limited. In this embodiment, two ring welding frames 42 and two ring welding devices 4 are shown to improve the production efficiency of the side-shifting frame 100.

[0054] Reference Figure 7 and Figure 9The circumferential welding device 4 also includes a circumferential welding clamping assembly 45 for fixing the position of the side-shifting frame 100. The circumferential welding clamping assembly 45 includes a circumferential welding positioning cylinder 451, an inner support positioning cylinder 452, and a rotary pressing cylinder 453 fixedly mounted on the circumferential welding frame 42, so as to press the upper and lower crossbeams and vertical beams 1002 of the side-shifting frame 100 onto the circumferential welding frame 42, thereby confining the spot-welded side-shifting frame 100 onto the circumferential welding frame 42. The type and number of cylinders in the circumferential welding clamping assembly 45 are not limited. In this embodiment, the above-mentioned cylinders are used as examples for illustration.

[0055] Reference Figure 1 and Figure 8 The conveying device 6 includes a transfer bracket 61, a sliding rod 62, and a gripping frame 63. The transfer bracket 61 is fixedly mounted on the operating platform 7. The height of the transfer bracket 61 is higher than that of the loading device 1, the circumferential welding device 4, and the unloading frame 5. A sliding rail 611 is provided above the transfer bracket 61 and extends along the length of the operating platform 7. The sliding rod 62 is slidably connected to the sliding rail 611. The sliding rod 62 is driven to move along the sliding rail 611 by a driving component. A gripping cylinder 621 is fixedly connected to the end of the sliding rod 62 away from the sliding rail 611. The piston rod of the gripping cylinder 621 is connected to the gripping frame 63. The system is fixedly connected. When the side-shifting frame 100 needs to be transferred to the circumferential welding device 4 or the unloading rack 5, the driving component drives the sliding rod 62 to move along the sliding rail 611, thereby moving the gripping frame 63 above the side-shifting frame 100. The gripping cylinder 621 extends to make the gripping frame 63 grip the side-shifting frame 100. The gripping cylinder 621 retracts, and the driving component continues to drive the sliding rod 62 to move above the circumferential welding frame 42 or the unloading rack 5. The gripping cylinder 621 extends to transport the side-shifting frame 100 to the circumferential welding device 4 or the unloading rack 5, thereby realizing the transfer and transport of the side-shifting frame 100 between the spot welding device 3, the circumferential welding device 4, and the unloading rack 5. In this embodiment, the conveying device 6 uses an electromagnet to magnetically grasp and transport the side-shifting frame 100.

[0056] The specific implementation process of this application embodiment is as follows: The first robot arm 13 sequentially grasps the upper crossbeam 1001, the vertical beam 1002, the lower crossbeam 1006, and the vertical beam 1002 and places them on the pre-positioning device 2 for pre-positioning. Then, the pre-positioned upper crossbeam 1001, vertical beam 1002, lower crossbeam 1006, and vertical beam 1002 are placed sequentially on the placement station in the first spot welding area 312 on the first rotating table 311. The spot welding rotating table 31 rotates 180 degrees, so that the first spot welding area 312 rotates to the second robot arm 14. The second robot arm 14 sequentially grasps the lower slider seat 1005, the reinforcing rib, the lifting ring 1003, and the hydraulic cylinder support 1004 and places them in the corresponding placement positions for assembly. At the same time, the first robot arm 13 continues to sequentially grasp the components to the second spot welding area 313. In the placement station, the spot welding turntable 31 continues to rotate 180 degrees. After all components are loaded, the spot welding clamping assembly 36 fixes the positions of all components of the side shift frame 100. The fixing sequence is as follows: the two vertical beam push cylinders 3621 push the vertical beam 1002 towards the vertical beam stop 315, the push cylinder 3622 pushes the vertical beam 1002 towards the push stop 316, the lower crossbeam cylinder 3631 pulls the pull plate 3632 towards the lower crossbeam stop 314, so that the lower crossbeam 1006 is pressed against the lower crossbeam stop 314, the upper crossbeam cylinder 3611 located between the upper crossbeam 1001 and the lower crossbeam 1006 pushes the upper crossbeam 1001 away from the lower crossbeam 1006, and the side of the upper crossbeam 1001 away from the lower crossbeam 1006... Two upper crossbeam cylinders 3611 push the upper crossbeam 1001 towards the lower crossbeam 1006. The piston rod of the lower pressing cylinder 3612 retracts, causing the lower pressing arm 36122 to move downward to press the upper crossbeam 1001. The rotating motor 34 drives the rotating arm 36132 to rotate, causing the pressure plate 36133 to press the lifting ring 1003. The piston rod of the lifting ring cylinder 3613 retracts, causing the lifting ring placement column 36131 to move towards the upper crossbeam 1001, so that the lifting ring 1003 abuts against the upper crossbeam 1001. The first hydraulic cylinder support cylinder 36141 drives the first push plate 36142 to move towards the second push plate 36146, so that the hydraulic cylinder support 1004 abuts against the first push plate 36142. The second hydraulic cylinder support cylinder 36145 drives the second push plate 36146 to move towards the second push plate 36146. Plate 36146 moves toward the upper crossbeam 1001, causing the second push plate 36146 to abut against the cylinder support 1004, thereby clamping the cylinder support 1004 between the first push plate 36142 and the second push plate 36146 and abutting against the upper crossbeam 1001. The piston rod of the lower slide block cylinder 3633 retracts, driving the lower pressure frame 3634 to move downward to press the lower slide block 1005 against the lower crossbeam 1006. The piston rods of the four reinforcing rib cylinders 3623 extend, driving the reinforcing rib placement column 3624 to move, so that the reinforcing ribs abut against the four corners of the side shift frame 100. The spot welding gun 1311 of the first robot 13 performs spot welding on the fixed side shift frame 100 components. The second robot 14 continues to feed materials to the spot welding turntable 31, and so on.

[0057] After the side-shifting frame 100 is spot-welded, the drive unit drives the sliding rod 62 to move along the sliding rail 611, so as to move the gripping frame 63 to above the spot-welding turntable 31. The gripping cylinder 621 extends to make the gripping frame 63 grip the side-shifting frame 100. The gripping cylinder 621 retracts, and the drive unit continues to drive the sliding rod 62 to move above the ring welding frame 42. The gripping cylinder 621 extends to place the side-shifting frame 100 on the ring welding frame 42. The ring welding clamping assembly 45 fixes the side-shifting frame 100 on the ring welding frame 42. The turntable connecting rod 432 rotates 360 degrees around the axis of the first turntable 431, and the ring welding frame 42 rotates 360 degrees around the axis of the second turntable 433, so that the ring welding robot 41 performs ring welding on the side-shifting frame 100.

[0058] After the circumferential welding of the side-shifting frame 100 is completed, the driving component drives the sliding rod 62 to move along the sliding rail 611, so as to move the gripping frame 63 to above the circumferential welding frame 42. The gripping cylinder 621 extends to make the gripping frame 63 grip the side-shifting frame 100. The gripping cylinder 621 retracts, and the driving component continues to drive the sliding rod 62 to move to above the unloading frame 5. The gripping cylinder 621 extends to place the side-shifting frame 100 on the unloading frame 5, and the unloading is completed.

[0059] The aforementioned production line can automatically grasp, assemble, spot weld, circumferentially weld, and unload the various components of the side-shifting frame 100, thereby enabling mass production of the side-shifting frame 100. Furthermore, during loading, the upper and lower crossbeams and vertical beams 1002 of the side-shifting frame 100 are pre-positioned, reducing the occurrence of misalignment of the various components of the side-shifting frame 100 during assembly, improving the welding and assembly efficiency of the side-shifting frame 100, and increasing the production efficiency of the side-shifting frame 100.

[0060] The embodiments described in this application are preferred embodiments and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. An automated welding and assembly production line for a side-shifting frame, characterized in that, include: The feeding device (1) includes a first robotic arm (13), which is used to feed and assemble each workpiece; A pre-positioning device (2) includes a crossbeam positioning assembly (21) and a vertical beam positioning assembly (22). The crossbeam positioning assembly (21) includes a first bracket (211), a crossbeam cylinder (212), and a crossbeam baffle (213). The crossbeam cylinder (212) and the crossbeam baffle (213) are respectively installed at both ends of the first bracket (211) along its length. The piston rod of the crossbeam cylinder (212) moves toward the crossbeam baffle (213). The vertical beam positioning assembly (22) includes a second bracket (221), a vertical beam cylinder (222), and a vertical beam baffle (223). The vertical beam cylinder (222) and the vertical beam baffle (223) are respectively installed at both ends of the second bracket (221) along its length. The piston rod of the vertical beam cylinder (222) moves toward the vertical beam baffle (223). Spot welding device (3), the spot welding device (3) is used to spot weld each assembled workpiece; A ring welding device (4) is used to perform ring welding on each workpiece that has been spot welded; The beam positioning assembly (21) includes a beam tensioning cylinder (214) fixedly connected to the first bracket (211). The beam tensioning cylinder (214) is located between the beam cylinder (212) and the beam baffle (213). The moving direction of the piston rod of the beam tensioning cylinder (214) is perpendicular to the moving direction of the piston rod of the beam cylinder (212). The vertical beam positioning assembly (22) includes a vertical beam tensioning cylinder (224) fixedly connected to the second bracket (221). The vertical beam tensioning cylinder (224) is located between the vertical beam cylinder (222) and the vertical beam baffle (223). The moving direction of the piston rod of the vertical beam tensioning cylinder (224) is perpendicular to the moving direction of the piston rod of the vertical beam cylinder (222). The feeding device (1) further includes a second robotic arm (14) and two feeding turntables (12). Two feeding turntables (121) are rotatably connected to the two feeding turntables (12). A motor is fixedly installed inside the feeding turntable (12). The output shaft of the motor is fixedly connected to the feeding turntable (121). A first placement seat (122) and a second placement seat (123) are fixedly installed on the two feeding turntables (121). The first placement seat (122) includes two fixedly connected first placement plates (1221). The second placement seat (123) includes two fixedly connected second placement plates (1231). The two first placement plates (1221) and the two second placement plates (1231) gradually move away from each other from top to bottom to form an inclined surface. The spot welding device (3) includes a spot welding turntable (31) and a spot welding clamping assembly (36). The spot welding turntable (31) is installed between the first robot (13) and the second robot (14). The spot welding turntable (31) is used to limit the placement position of the side shift frame (100). The spot welding clamping assembly (36) includes a first limiting module (361) for limiting the upper crossbeam (1001) and the cylinder support (1004). The first limiting module (361) includes an upper crossbeam cylinder (3611) and a cylinder support cylinder group (3614) fixedly connected to the spot welding turntable (31). The upper crossbeam cylinder (3611) and the cylinder support cylinder group (3614) are located on both sides of the upper crossbeam (1001). The cylinder support cylinder assembly (3614) includes a first cylinder support cylinder (36141) and a second cylinder support cylinder (36145). The piston rod of the first cylinder support cylinder (36141) is fixedly connected to a first push plate (36142). The piston rod of the second cylinder support cylinder (36145) is fixedly connected to a second push plate (36146). The first push plate (36142) is fixedly connected to a first connecting rod (36143). The end of the first connecting rod (36143) away from the first push plate (36142) is fixedly connected to a second connecting rod (36144). The length directions of the first connecting rod (36143) and the second connecting rod (36144) are perpendicular to each other. The second cylinder support cylinder (36145) is located at the end of the second connecting rod (36144) away from the first connecting rod (36143).

2. The automatic welding and assembly production line for a side-shifting frame according to claim 1, characterized in that, The spot welding clamping assembly (36) includes a second limiting module (362), which includes a push cylinder (3622), a push stop (316), and a reinforcing rib cylinder (3623) fixedly connected to the spot welding turntable (31). The push cylinder (3622) and the push stop (316) are located on opposite sides of the vertical beam (1002). The piston rod of the push cylinder (3622) abuts against the vertical beam (1002) and its moving direction is perpendicular to the length direction of the vertical beam (1002). The reinforcing rib cylinder (3623) is located inside the side shift frame (100) and corresponds one-to-one with the number of reinforcing ribs. The piston rod of the reinforcing rib cylinder (3623) is fixedly connected to a reinforcing rib placement column (3624).

3. The automatic welding and assembly production line for a side-shifting frame according to claim 1, characterized in that, The spot welding clamping assembly (36) includes a third limiting module (363) for pressing the lower crossbeam (1006) and the lower slide block (1005). The third limiting module (363) includes a lower crossbeam cylinder (3631) and a lower slide block cylinder (3633) fixedly mounted on the spot welding turntable (31). The piston rod of the lower crossbeam cylinder (3631) abuts against the lower crossbeam (1006) and its moving direction is perpendicular to the length direction of the lower crossbeam (1006). The piston rod of the lower slide block cylinder (3633) is fixedly connected to a lower pressure frame (3634). The lower pressure frame (3634) is located above the lower crossbeam (1006). When the piston rod of the lower slide block cylinder (3633) retracts, it drives the lower pressure frame (3634) to press against the lower slide block (1005).

4. The automatic welding and assembly production line for a side-shifting frame according to claim 3, characterized in that, The piston rod of the lower crossbeam cylinder (3631) is fixedly connected to a pull plate (3632), the lower crossbeam (1006) is located on the pull plate (3632), and a lower crossbeam stop (314) is fixedly installed on the spot welding turntable (31). The lower crossbeam stop (314) is located at the end of the lower crossbeam (1006) away from the upper crossbeam (1001).

5. The automatic welding and assembly production line for a side-shifting frame according to claim 1, characterized in that, The circumferential welding device (4) includes a circumferential welding manipulator (41), a fixed column (43), and a circumferential welding frame (42). The circumferential welding manipulator (41) is located on the side of the circumferential welding frame (42). The circumferential welding manipulator (41) is used to perform circumferential welding on the side-shifting frame (100). The fixed column (43) is rotatably connected to a first turntable (431). A turntable connecting rod (432) is fixedly installed on the first turntable (431). A second turntable (433) is rotatably connected to both ends of the turntable connecting rod (432) in the length direction. The second turntable (433) is fixedly connected to the circumferential welding frame (42).

6. The automatic welding and assembly production line for a side-shifting frame according to claim 1, characterized in that, It also includes a conveying device (6), which includes a transfer bracket (61), a sliding rod (62), a gripping frame (63) and a gripping cylinder (621). A sliding rail (611) is provided above the transfer bracket (61), the sliding rod (62) is slidably connected to the sliding rail (611), the gripping cylinder (621) is fixedly connected to the sliding rod (62), and the piston rod of the gripping cylinder (621) is fixedly connected to the gripping frame (63).

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