A device for intelligent switching of multiple car models produced on the same production line in a gate loop.

Abstract

This invention discloses an intelligent switching device for the co-production of multiple car models on a gate loop line. It includes a four-sided heavy-duty turntable, a fixture platform, a double-layer fixture library, an loading robot, a welding robot, and an unloading robot. The four-sided heavy-duty turntable is fixedly mounted on the ground to the left of the double-layer fixture library. The fixture platforms are positioned on both the turntable and the library and can slide between them. The loading robot is located on the lower left side of the turntable, the unloading robot on the lower right side, and the welding robot above it. One to ten fixture platforms are provided to enable switching production for up to ten car models on the corresponding platforms. This invention features a compact design, high fixture switching efficiency, and the ability to support mixed-line production of ten car models, effectively improving the car production cycle time.

Description

Technical Field

[0001] This invention relates to the field of fixture switching equipment, and in particular to an intelligent switching device for the co-production of multiple car models on an automotive door ring line. Background Technology

[0002] Currently, due to the rapid development of new energy vehicle technology, in order to increase product competitiveness and seize market share, new energy vehicles need to be updated at least once a year, and sometimes even three times a year. Generally speaking, building a new model production line in the short term does not meet current market demand. This requires that when planning new model production lines, it is necessary to be able to achieve the production of multiple models on a single production line.

[0003] To address this issue, existing technologies typically utilize fixture switching devices to switch fixtures required for different vehicle models on a single production line, thereby meeting the production needs of various models. However, current technologies achieve the switching of different fixture platforms through a fixture library switching device. This method includes a guide rail assembly with a servo slide mounted on it. The servo slide is slidably connected to the guide rail assembly, and multiple fixture libraries are connected to the guide rail assembly. Each fixture library has a fixture platform that can move onto the servo slide. The above method has three drawbacks: First, the fixture switching path is limited, making it impossible to switch to new production line fixtures during online production, and it cannot achieve multi-station parallel operation; second, it has low floor space utilization and poor scalability, failing to meet the demands of high-cycle, multi-variety production; third, adding a new vehicle model requires modifying the entire production line, resulting in high modification costs and disruption to normal production.

[0004] How to solve the above problems has become an urgent technical issue. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent switching device for the co-production of multiple car models on a car door ring line, which is compact in space, supports mixed production of ten car models, has high fixture switching efficiency, and can effectively improve the car production cycle.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for intelligent switching in the co-production of multiple car models on an automotive door ring line includes a four-sided heavy-duty turntable, a fixture platform, a double-layer fixture library, an loading robot, a welding robot, and an unloading robot. The four-sided heavy-duty turntable is fixedly mounted on the ground to the left of the double-layer fixture library. The fixture platform is mounted on both the four-sided heavy-duty turntable and the double-layer fixture library and can slide between them. The loading robot is positioned on the lower left side of the four-sided heavy-duty turntable. The robot is used to automatically load parts onto the fixture platform located on the four-sided heavy-duty turntable. The robot unloading parts is located on the lower right side of the four-sided heavy-duty turntable to automatically unload parts from the fixture platform located on the four-sided heavy-duty turntable. The welding robot is located above the four-sided heavy-duty turntable to automatically weld the workpieces located on the fixture platform located on the four-sided heavy-duty turntable. A total of 1 to 10 fixture platforms are provided to enable switching production of up to ten different vehicle models corresponding to the fixture platforms.

[0008] Preferably, the four-sided heavy-duty turntable includes a heavy-duty turntable, a rotating tetrahedral frame, clamping components, and a fixture platform fixing component; the heavy-duty turntable is installed on the ground, the rotating tetrahedral frame is disposed on the heavy-duty turntable and can rotate with the heavy-duty turntable to realize the switching of four workstation positions, the clamping components are disposed on the rotating tetrahedral frame, and four sets of clamping components are provided for clamping the fixture platform and realizing the pneumatic and electrical connection between the fixture platform and the four-sided heavy-duty turntable, and the fixture platform fixing component is disposed on the rotating tetrahedral frame, and four sets of fixture platform fixing components are provided for bearing, positioning and fixing the fixture platform.

[0009] Preferably, the clamping assembly includes a clamping cylinder, a clamping seat, a clamping block, a thrust cylinder, and a first pneumatic-electric module interface. The clamping cylinder is mounted on the rotating tetrahedral frame via the clamping seat. Each clamping assembly includes two sets of clamping cylinders. The clamping block is mounted on the movable end of the clamping cylinder to fix and clamp the fixture platform under the drive of the clamping cylinder. The thrust cylinder is mounted on the rotating tetrahedral frame, and the first pneumatic-electric module interface is located on the thrust cylinder to connect with a corresponding interface on the fixture platform under the drive of the thrust cylinder, thereby realizing the pneumatic-electric connection between the fixture platform and the tetrahedral heavy-duty turntable.

[0010] Preferably, the fixture platform fixing assembly includes a fixing frame, a universal ball joint, a mounting block, a clamping module, a first positioning module, a first guiding module, a vehicle model sensor, a sensor support, and a first limiting block. The fixing frame is fixedly disposed on the four sides of the rotating tetrahedral frame. The universal ball joint is fixedly mounted on the fixing frame via the mounting block. The universal ball joint is arranged in three rows and six columns to enable the fixture platform to slide on the fixture platform fixing assembly and to support the fixture platform. The first guiding module is fixedly disposed in the middle of the fixing frame. The first guiding module is arranged in two rows and five columns to guide the sliding process of the fixture platform. The vehicle model sensor is mounted on the fixing frame via the sensor support to sense the vehicle model information corresponding to the fixture platform. The clamping module is installed on the left and right sides of the fixing frame to clamp and fix the fixture platform. The first positioning module is installed on the left and right sides of the fixing frame to position the fixture platform. The first limiting block is disposed on the fixing frame to limit the sliding position of the fixture platform.

[0011] Preferably, the double-layer fixture library includes a double-layer fixture library frame, double-layer fixture storage positions, floor hoisting components, floor servo slides, ground sliding components, ground servo slides, and switching storage positions. The double-layer fixture library frame is located on the right side of the four-sided heavy-duty turntable, and the double-layer fixture library frame is configured as a double-layer structure. Three sets of double-layer fixture storage positions are arranged on the first layer of the double-layer fixture library frame, and four sets are arranged on the second layer of the double-layer fixture library frame, for storing the fixture platform.

[0012] Preferably, the double-layer fixture storage location includes a first storage location, a second storage location, a third storage location, a fourth storage location, a fifth storage location, a sixth storage location, and a seventh storage location; wherein, the fifth storage location is an empty storage location, used for transferring the fixture platform from the second layer to the first layer or from the first layer to the second layer during the fixture platform switching process.

[0013] Preferably, the floor hoisting components are provided in two sets, including a first floor hoisting component and a second floor hoisting component. The first floor hoisting component and the second floor hoisting component are respectively set at corresponding positions on the double-layer fixture library frame and cooperate with corresponding double-layer fixture library positions to realize the vertical movement of the floor servo slide. The floor servo slides are provided in two sets, including a first floor servo slide and a second floor servo slide. The first floor servo slide is installed on the first floor hoisting component, and the second floor servo slide is installed on the second floor hoisting component. The floor servo slides and the... The double-layer fixture storage unit is configured to move the fixture platform in the double-layer fixture storage unit to the floor servo slide and further to the first or second floor via the floor hoisting assembly. The ground sliding assembly is installed in the middle of the double-layer fixture storage frame. The ground servo slide is installed on the ground sliding assembly and can move along the ground sliding assembly to realize the transfer of the fixture platform to the switching storage unit. The switching storage unit is set in the first layer of the double-layer fixture storage frame to realize the movement and docking of the fixture platform between the four-sided heavy-duty turntable and the double-layer fixture storage unit.

[0014] Preferably, the switching location includes a switching location fixing component, a switching servo slide, a second guide module, and a second positioning module. The switching servo slide can slide on the switching location fixing component to realize the switching and transfer of the fixture platform between the ground servo slide and the four-sided heavy-duty turntable. The second guide module is installed on the switching location fixing component to realize the sliding guidance of the fixture platform on the switching location. The second positioning module is located at the middle position of the switching location fixing component to position the fixture platform at the middle position of the switching location fixing component so that the switching servo slide can push the fixture platform from the left or right to move it to the ground servo slide or the four-sided heavy-duty turntable.

[0015] Preferably, the switching storage location fixing assembly includes a storage location fixing seat, a sliding rail, a rack, a second limiting block, a third limiting block, and a cable chain. The storage location fixing seat is fixedly installed on the ground. The sliding rail is installed on both sides of the middle part of the storage location fixing seat, and the rack is installed in the middle position of the storage location fixing seat. The second limiting block is installed at one end of the storage location fixing seat to limit the movement position of the switching servo slide and prevent the switching servo slide from sliding out of the safe position. The third limiting block is installed at the other end of the storage location fixing seat to limit the movement position of the switching servo slide and prevent the switching servo slide from sliding out of the safe position. One end of the cable chain is installed on the switching servo slide, and the other end of the cable chain is installed on the storage location fixing seat to protect the electrical circuits connected to the switching servo slide.

[0016] Preferably, the switching servo slide includes a slide motor, a motor base, a rolling gear, a slide plate, a first traction positioning block, a second traction positioning block, a first lifting cylinder, a second lifting cylinder, a fourth limiting block, and a fifth limiting block. The slide motor is mounted on the slide plate via the motor base. The rolling gear is mounted on the output end of the slide motor and can mesh with the rack under the drive of the slide motor, thereby driving the slide plate to move along the sliding rail. The slide plate is disposed on the sliding rail to realize the sliding of the switching servo slide on the switching position fixing assembly. The first traction positioning block is mounted on the first lifting cylinder. A lifting cylinder is installed on the left side of the slide plate. The first traction positioning block can move up and down under the drive of the first lifting cylinder and can cooperate with the first traction wheel on the fixture platform. The second traction positioning block is installed on the second lifting cylinder. The second traction positioning block can move up and down under the drive of the second lifting cylinder and can cooperate with the second traction wheel on the fixture platform. The fourth limiting block is disposed on the left side of the slide plate and cooperates with the second limiting block to limit the movement position of the slide plate. The fifth limiting block is disposed on the right side of the slide plate and cooperates with the third limiting block to limit the movement position of the slide plate.

[0017] Preferably, the clamping platform includes an L-shaped clamping platform frame, a sliding plate, a first traction wheel, a first positioning bushing, a second positioning bushing, a second traction wheel, a vehicle model sensing block, a sixth limiting block, and a second pneumatic / electrical interface; the sliding plate is disposed below the L-shaped clamping platform frame and is used to form sliding contact with the clamping platform fixing component, the switching storage location, the double-layer clamping storage location, the floor servo slide, and the ground servo slide; the first traction wheel and the second traction wheel are respectively disposed on the corresponding sides of the L-shaped clamping platform frame and are used to cooperate with the first traction positioning block and the second traction positioning block respectively to realize the traction into and out of the clamping platform and the switching transfer; the first positioning bushing and the second positioning bushing are located on the L-shaped... Below the fixture platform frame, positioning pins are used to cooperate with the switching storage location, the double-layer fixture storage location, the fixture platform fixing component, the floor servo slide, and the ground servo slide to achieve the fixing and positioning of the fixture platform; the vehicle model sensing block is set on the L-shaped fixture platform frame and can cooperate with the vehicle model sensor to achieve vehicle model production identification; the sixth limiting block is set on one side of the L-shaped fixture platform frame and can cooperate with the first limiting block on the four-sided heavy-duty turntable to achieve the limiting of the fixture platform; the second pneumatic and electrical interface is set on one side of the L-shaped fixture platform frame and can cooperate with the first pneumatic and electrical module interface to achieve the pneumatic and electrical connection between the fixture platform and the four-sided heavy-duty turntable.

[0018] Preferably, there are a total of 10 clamping platforms, including a first clamping platform, a second clamping platform, a third clamping platform, a fourth clamping platform, a fifth clamping platform, a sixth clamping platform, a seventh clamping platform, an eighth clamping platform, a ninth clamping platform, and a tenth clamping platform. The first clamping platform is disposed on the first storage location, the second clamping platform is disposed on the second storage location, the third clamping platform is disposed on the third storage location, the fourth clamping platform is disposed on the fourth storage location, the sixth clamping platform is disposed on the sixth storage location, and the seventh clamping platform is disposed on the seventh storage location. The fifth, eighth, ninth, and tenth clamping platforms are respectively mounted on four sets of clamping platform fixing assemblies on the four-sided heavy-duty turntable.

[0019] Due to the adoption of the above structure, the present invention has the following beneficial effects:

[0020] 1. In this invention, the double-layer fixture library occupies less floor space than the traditional single-layer library, supports the storage of fixtures for up to ten vehicle models, and adopts a vertical space stacking design with the four-sided heavy-duty turntable and the double-layer fixture library, which greatly improves the utilization rate of the longitudinal space of the production line.

[0021] 2. In this invention, the four-sided heavy-duty turntable operates in parallel at four stations, loading → welding → unloading → preparation, realizing continuous operation of the welding robot. The overall efficiency of the equipment is greatly improved compared with the traditional system. The four-sided heavy-duty turntable can also realize mixed-line production of one to four different models at the same station without changing fixtures and tooling.

[0022] 3. In this invention, the fixture platform can seamlessly switch between a four-sided heavy-duty turntable and a double-layer fixture library, supporting a 4+6 dynamic scheduling mode, namely: 4 permanent four-sided heavy-duty turntables + 6 standby double-layer fixture libraries. The number of compatible models for the production line is expanded to 10, far exceeding the industry average of 3-5 models. Furthermore, the double-layer fixture library can be used to import new models without affecting the normal production of models currently in production. Adding new models only requires adding a fixture platform module, thus shortening the production line modification cycle.

[0023] 4. In this invention, the double-layer fixture library uses two floor servo slides and one ground servo slide to import and export fixture platforms, which greatly improves the import and export speed of fixture platforms. It supports the optimization of mixed production scheduling for ten models within 72 hours through AI-based intelligent scheduling algorithms, which greatly improves the production efficiency of the production line.

[0024] In summary, the intelligent switching device of the present invention for the co-production of multiple car models on a gate ring line is compact in space and has high fixture switching efficiency. It can support mixed production of ten car models and effectively improve the car production cycle. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the four-sided heavy-load turntable in the present invention;

[0028] Figure 3 This is a schematic diagram of the clamping assembly of the four-sided heavy-duty rotary table in this invention;

[0029] Figure 4 This is a schematic diagram of the fixture platform fixing assembly of the four-sided heavy-duty rotary table in this invention.

[0030] Figure 5 This is a schematic diagram of the structure of the double-layer fixture library in this invention;

[0031] Figure 6 This is a schematic diagram showing the location of the double-layer fixture library in this invention;

[0032] Figure 7 This is a schematic diagram of the floor hoisting assembly and floor servo slide of the double-layer fixture library in this invention;

[0033] Figure 8 This is a schematic diagram of the switching location structure of the double-layer fixture library in this invention;

[0034] Figure 9 This is a schematic diagram of the switching location fixing component of the double-layer fixture library in this invention.

[0035] Figure 10 This is a schematic diagram of the servo slide structure for switching storage positions in the double-layer fixture library of the present invention.

[0036] Figure 11 This is a schematic diagram of the fixture platform structure in this invention;

[0037] Figure 12 This is a schematic diagram showing the position of the clamping platform in this invention;

[0038] Figure 13 This is a schematic diagram of the welding process in this invention. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please refer to Figures 1 to 13As shown, this invention provides an intelligent switching device for the co-production of multiple car models on a gate ring line, including a four-sided heavy-duty turntable 1, a fixture platform 2, a double-layer fixture library 3, an loading robot 4, a welding robot 5, and an unloading robot 6. The four-sided heavy-duty turntable 1 is fixedly mounted on the ground to the left of the double-layer fixture library 3. The fixture platform 2 is mounted on both the four-sided heavy-duty turntable 1 and the double-layer fixture library 3, and can slide between them. The loading robot 4 is located on the lower left side of the four-sided heavy-duty turntable 1 and is used to automatically load parts onto the fixture platform 2 located on the four-sided heavy-duty turntable 1. The unloading robot 6 is located on the lower right side of the four-sided heavy-duty turntable 1 and is used to automatically unload parts from the fixture platform 2 located on the four-sided heavy-duty turntable 1. The welding robot 5 is positioned above the four-sided heavy-duty turntable 1 and is used to automatically weld workpieces located on the fixture platform 2 on the four-sided heavy-duty turntable 1. There are 1-10 fixture platforms 2, such as 3, 6, or 10, depending on the needs. This allows for the switching production of up to ten different car models on the fixture platform 2, thus meeting the requirements of multi-model co-production on the automotive door ring line.

[0041] refer to Figure 2 The tetrahedral heavy-duty turntable 1 includes a heavy-duty turntable 11, a rotating tetrahedral frame 12, clamping components 13, and a fixture platform fixing component 14. The heavy-duty turntable 11 is mounted on the ground. The rotating tetrahedral frame 12 is mounted on the heavy-duty turntable 11 and can rotate with the turntable 11 to switch between four workstation positions. The clamping components 13 are mounted on the rotating tetrahedral frame 12, and four sets of clamping components are provided for clamping the fixture platform 2 and establishing a pneumatic and electrical connection between the fixture platform 2 and the tetrahedral heavy-duty turntable 1. The fixture platform fixing component 14 is mounted on the rotating tetrahedral frame 12, and four sets of fixture platform fixing components are provided for bearing, positioning, and fixing the fixture platform 2.

[0042] refer to Figure 3The clamping assembly 13 includes a clamping cylinder 131, a clamping seat 132, a clamping block 133, a thrust cylinder 134, and a first pneumatic-electric module interface 135. The clamping cylinder 131 is mounted on the rotating tetrahedral frame 12 via the clamping seat 132. Preferably, each clamping assembly 13 includes two sets of clamping cylinders 131. The clamping block 133 is mounted on the movable end of the clamping cylinder 131 and can clamp and fix the fixture platform 2 under the drive of the clamping cylinder 131. The thrust cylinder 134 is mounted on the rotating tetrahedral frame 12, and the first pneumatic-electric module interface 135 is located on the thrust cylinder 134 and can connect to the corresponding interface on the fixture platform 2 under the drive of the thrust cylinder 134, thereby realizing the pneumatic-electric connection between the fixture platform 2 and the tetrahedral heavy-duty turntable 1.

[0043] refer to Figure 4 The clamping platform fixing assembly 14 includes a fixing frame 141, universal balls 142, mounting blocks 143, clamping modules 144, a first positioning module 145, a first guide module 146, a vehicle model sensor 147, a sensor support 148, and a first limiting block 149. The fixing frame 141 is fixedly disposed on the four sides of the rotating tetrahedral frame 12. The universal balls 142 are mounted and fixed to the fixing frame 141 via the mounting blocks 143. Preferably, the universal balls 142 are arranged in three rows and six columns to enable the clamping platform 2 to slide on the clamping platform fixing assembly 14 and to support the clamping platform 2. The first guide module 146 is mounted and fixed at the middle position of the fixing frame 141. Preferably, the first guide module 146 is arranged in two rows and five columns to guide the sliding process of the clamping platform 2. The vehicle model sensor 147 is mounted on the fixed frame 141 via the sensor support 148, and is used to sense the vehicle model information corresponding to the clamping platform 2. The clamping modules 144 are mounted on the left and right sides of the fixed frame 141, and preferably in two sets, for clamping and fixing the clamping platform 2. The first positioning modules 145 are mounted on the left and right sides of the fixed frame 141, and preferably in two sets, for positioning the clamping platform 2. The first limiting block 149 is disposed on the fixed frame 141 to limit the sliding position of the clamping platform 2.

[0044] refer to Figure 5The double-layer fixture library 3 includes a double-layer fixture library frame 31, double-layer fixture storage positions 32, a floor hoisting assembly 33, a floor servo slide 34, a ground sliding assembly 35, a ground servo slide 36, and a switching storage position 37. The double-layer fixture library frame 31 is located on the right side of the four-sided heavy-duty turntable 1, and the double-layer fixture library frame 31 is configured as a double-layer structure. Further, three sets of double-layer fixture storage positions 32 are arranged on the first layer of the double-layer fixture library frame 31, and four sets are arranged on the second layer of the double-layer fixture library frame 31, for storing the fixture platform 2.

[0045] refer to Figure 6 The double-layer fixture storage location 32 includes a first storage location 321, a second storage location 322, a third storage location 323, a fourth storage location 324, a fifth storage location 325, a sixth storage location 326, and a seventh storage location 327. The fifth storage location 325 is an empty storage location used for transferring fixtures from the second layer to the first layer or from the first layer to the second layer during the switching process of the fixture platform 2.

[0046] refer to Figure 7 The floor hoisting assembly 33 comprises two sets, including a first floor hoisting assembly 331 and a second floor hoisting assembly 332. The first floor hoisting assembly 331 and the second floor hoisting assembly 332 are respectively positioned at corresponding locations on the double-layer fixture library frame 31 and cooperate with corresponding double-layer fixture storage positions 32 to realize the vertical movement of the floor servo slide 34. The floor servo slide 34 comprises two sets, including a first floor servo slide 341 and a second floor servo slide 342. The first floor servo slide 341 is mounted on the first floor hoisting assembly 331, and the second floor servo slide 342 is mounted on the second floor hoisting assembly 332. The floor servo slide 34, in cooperation with the double-layer fixture storage positions 32, allows the fixture platform 2 in the double-layer fixture storage positions 32 to move onto the floor servo slide 34, and further move to the first or second floor via the floor hoisting assembly 33. The ground sliding assembly 35 is installed in the middle position of the double-layer fixture library frame 31. The ground servo slide 36 is installed on the ground sliding assembly 35 and can move along the ground sliding assembly 35, thereby realizing the transfer of the fixture platform 2 to the switching storage position 37. The switching storage position 37 is set in the first layer of the double-layer fixture library frame 31 and is used to realize the movement and docking of the fixture platform 2 between the four-sided heavy-duty turntable 1 and the double-layer fixture library 3.

[0047] refer to Figure 8The switching storage location 37 includes a switching storage location fixing component 371, a switching servo slide 372, a second guide module 373, and a second positioning module 374. The switching servo slide 372 can slide on the switching storage location fixing component 371, enabling the clamping platform 2 to switch and transfer between the ground servo slide 36 and the four-sided heavy-duty turntable 1. The second guide module 373 is mounted on the switching storage location fixing component 371, guiding the clamping platform 2 to slide on the switching storage location 37. The second positioning module 374 is located at the center of the switching storage location fixing component 371, positioning the clamping platform 2 in the middle position of the switching storage location fixing component 371, allowing the switching servo slide 372 to push the clamping platform 2 from the left or right side onto the ground servo slide 36 or the four-sided heavy-duty turntable 1.

[0048] refer to Figure 9 The switching storage location fixing assembly 371 includes a storage location fixing seat 3711, a sliding rail 3712, a rack 3713, a second limiting block 3714, a third limiting block 3715, and a cable chain 3716. The storage location fixing seat 3711 is fixedly mounted on the ground. The sliding rail 3712 is installed on both sides of the middle portion of the storage location fixing seat 3711. The rack 3713 is installed at the middle position of the storage location fixing seat 3711. The second limiting block 3714 is installed at one end of the storage location fixing seat 3711 to restrict the movement of the switching servo slide 372, preventing the switching servo slide 372 from sliding out of its safe position. The third limiting block 3715 is installed at the other end of the storage location fixing seat 3711 to restrict the movement of the switching servo slide 372, preventing the switching servo slide 372 from sliding out of its safe position. One end of the drag chain 3716 is mounted on the switching servo slide 372, and the other end of the drag chain 3716 is mounted on the storage location fixing seat 3711, for protecting the electrical lines connected to the switching servo slide 372.

[0049] refer to Figure 10The switching servo slide 372 includes a slide motor 3721, a motor base 3722, a rolling gear 3723, a slide plate 3724, a first traction positioning block 3725, a second traction positioning block 3726, a first lifting cylinder 3727, a second lifting cylinder 3728, a fourth limiting block 3729, and a fifth limiting block 37210. One end of the drag chain 3716 is mounted on the slide plate 3724 of the switching servo slide 372, and the slide motor 3721 is mounted on the slide plate 3724 via the motor base 3722. The rolling gear 3723 is mounted on the output end of the slide motor 3721 and can mesh with the rack 3713 under the drive of the slide motor 3721, thereby driving the slide plate 3724 to move along the sliding rail 3712. The slide plate 3724 is disposed on the slide rail 3712, thereby enabling the switching servo slide 372 to slide on the switching storage position fixing assembly 371. The first traction positioning block 3725 is mounted on the first lifting cylinder 3727, which is mounted on the left side of the slide plate 3724. The first traction positioning block 3725 can move up and down under the drive of the first lifting cylinder 3727 and can cooperate with the first traction wheel 23 on the clamping platform 2. The second traction positioning block 3726 is mounted on the second lifting cylinder 3728, and can move up and down under the drive of the second lifting cylinder 3728 and can cooperate with the second traction wheel 26 on the clamping platform 2. The fourth limiting block 3729 is disposed on the left side of the slide plate 3724 and cooperates with the second limiting block 3714 to limit the movement position of the slide plate 3724. The fifth limiting block 37210 is disposed on the right side of the slide plate 3724 and cooperates with the third limiting block 3715 to restrict the movement position of the slide plate 3724.

[0050] refer to Figure 11The clamping platform 2 includes an L-shaped clamping platform frame 21, a sliding plate 22, a first traction wheel 23, a first positioning bushing 24, a second positioning bushing 25, a second traction wheel 26, a vehicle model sensing block 27, a sixth limiting block 28, and a second pneumatic / electrical interface 29. The sliding plate 22 is located below the L-shaped clamping platform frame 21 and cooperates with the clamping platform fixing assembly 14, the switching storage space 37, the double-layer clamping storage space 32, the floor servo slide 34, and the ground servo slide 36. The sliding plate 22 can form sliding contact with the first guide module 146 and the second guide module 373. The first traction wheel 23 and the second traction wheel 26 are respectively located on the corresponding sides of the L-shaped clamping platform frame 21 and cooperate with the first traction positioning block 3725 and the second traction positioning block 3726 respectively to realize the traction into and out of the clamping platform 2 and the switching transfer. The first positioning bushing 24 and the second positioning bushing 25 are located below the L-shaped fixture platform frame 21 and are used to cooperate with the positioning pins in the switching storage position 37, the double-layer fixture storage position 32, the fixture platform fixing assembly 14, the floor servo slide 34, and the ground servo slide 36 to achieve the fixing and positioning of the fixture platform 2. The vehicle model sensing block 27 is disposed on the L-shaped fixture platform frame 21 and can cooperate with the vehicle model sensor 147 to achieve vehicle model production identification. The sixth limiting block 28 is disposed on one side of the L-shaped fixture platform frame 21 and can cooperate with the first limiting block 149 on the four-sided heavy-duty turntable 1 to achieve the limiting of the fixture platform 2. The second pneumatic-electric interface 29 is disposed on one side of the L-shaped fixture platform frame 21 and can cooperate with the first pneumatic-electric module interface 135 to achieve the pneumatic-electric connection between the fixture platform 2 and the four-sided heavy-duty turntable 1.

[0051] refer to Figure 12The fixture platform 2 comprises 10 units, including a first fixture platform 201, a second fixture platform 202, a third fixture platform 203, a fourth fixture platform 204, a fifth fixture platform 205, a sixth fixture platform 206, a seventh fixture platform 207, an eighth fixture platform 208, a ninth fixture platform 209, and a tenth fixture platform 210. The first fixture platform 201 is located on the first storage location 321, the second fixture platform 202 is located on the second storage location 322, the third fixture platform 203 is located on the third storage location 323, the fourth fixture platform 204 is located on the fourth storage location 324, the sixth fixture platform 206 is located on the sixth storage location 326, and the seventh fixture platform 207 is located on the seventh storage location 327. The fifth clamping platform 205, the eighth clamping platform 208, the ninth clamping platform 209, and the tenth clamping platform 210 are respectively installed on the clamping modules 144 of the four sets of clamping platform fixing components 14 on the four-sided heavy load turntable 1.

[0052] refer to Figure 13 The welding process of the present invention may include the following steps:

[0053] At times S1 and T0, the loading robot 4 completes the loading of parts at station A.

[0054] At S2, T0+45 seconds, the four-sided heavy load turntable 1 rotates 90°, and the loading robot 4 completes the loading of material at station B.

[0055] At S3 and T0+90 seconds, the four-sided heavy load turntable 1 continues to rotate 90°, the loading robot 4 completes the loading at station C, and the welding robot 5 completes the welding at station A.

[0056] At S4, T0+135 seconds, the four-sided heavy load turntable 1 continues to rotate 90°, the loading robot 4 completes the loading of D station, the unloading robot 6 removes the workpiece from A station, and the welding robot 5 completes the welding of B station.

[0057] At S5 and T0+180 seconds, the four-sided heavy-load turntable 1 continues to rotate 90°, the loading robot 4 completes the loading of the workpiece at station A, the unloading robot 6 removes the workpiece from station B, and the welding robot 5 completes the welding at station C.

[0058] Through the above cyclical actions, a production cycle of 45 seconds per piece can be achieved.

[0059] The fixture platform switching process of the present invention can be described in the following case, that is, replacing the fifth fixture platform 205 located on the four-sided heavy load turntable 1 with the first fixture platform 201 of the second layer of the double-layer fixture library 3.

[0060] The first step involves guiding the first clamping platform 201 onto the ground servo slide 36. The first clamping platform 201 is moved from the first storage location 321 onto the first floor servo slide 341; the first floor hoisting assembly 331 transports the first floor servo slide 341 and the first clamping platform 201 on it to the first floor; the first clamping platform 201 is then transferred to the fifth storage location 325; subsequently, the first floor hoisting assembly 331 transports the first floor servo slide 341 back to the second floor; the ground servo slide 36 is moved to the vicinity of the fifth storage location 325 via the ground sliding assembly 35; the fifth storage location 325 transfers the first clamping platform 201 onto the ground servo slide 36.

[0061] The second step is to move the fifth clamping platform 205 from the four-sided heavy load turntable 1 to the vicinity of the third storage location 323. Specifically, the second-floor servo slide 342 in the double-layer fixture library 3 moves to the vicinity of the switching position 37 on the first floor of the double-layer fixture library 3; the fifth fixture platform 205 is located on the four-sided heavy-duty turntable 1; the switching servo slide 372 on the switching position 37 is connected to the first traction wheel 23 on the fifth fixture platform 205 through the first traction positioning block 3725, and pulls the fifth fixture platform 205 to the middle position of the switching position 37; subsequently, the second positioning module 374 positions the fifth fixture platform 205; the switching servo slide 372 moves to the corresponding traction position and is connected to the second traction wheel 26 on the fifth fixture platform 205 through the second traction positioning block 3726; the switching servo slide 372 pushes the fifth fixture platform 205 onto the second-floor servo slide 342; the second-floor hoisting assembly 332 transports the second-floor servo slide 342 and the fifth fixture platform 205 on it to the vicinity of the third position 323 in the second floor.

[0062] The third step involves guiding the first clamping platform 201 onto the four-sided heavy-duty turntable 1. Specifically, the ground sliding assembly 35 transports the ground servo slide 36 and the first clamping platform 201 on it to the vicinity of the switching storage position 37; the switching servo slide 372 connects to the second traction wheel 26 on the first clamping platform 201 via the second traction positioning block 3726, and pulls the first clamping platform 201 to the middle position of the switching storage position 37; the second positioning module 374 positions the first clamping platform 201; subsequently, the switching servo slide 372 moves to the corresponding traction position and connects to the first traction wheel 23 on the first clamping platform 201 via the first traction positioning block 3725; the switching servo slide 372 pushes the first clamping platform 201 to move onto the four-sided heavy-duty turntable 1. After the first clamping platform 201 enters the four-sided heavy-duty turntable 1, the first guide module 146 on the clamping platform fixing assembly 14 guides the first clamping platform 201. When the first clamping platform 201 reaches the position of the first limit block 149 on the clamping platform fixing assembly 14, the first positioning module 145 positions the first clamping platform 201, and the clamping module 144 clamps the first clamping platform 201. At the same time, the vehicle model sensor 147 cooperates with the vehicle model sensing block 27 to determine the current production vehicle model. Further, the clamping assembly 13 on the four-sided heavy-duty turntable 1 fixes and clamps the first clamping platform 201. The first pneumatic-electric module interface 135 on the clamping assembly 13 cooperates and connects with the second pneumatic-electric interface 29 on the first clamping platform 201, thereby completing the mechanical and pneumatic-electric connection between the first clamping platform 201 and the four-sided heavy-duty turntable 1.

[0063] The fourth step involves guiding the fifth clamping platform 205 to the first storage location 321. Specifically, the ground sliding assembly 35 moves the ground servo slide 36 to the other end; the second-floor hoisting assembly 332 transports the second-floor servo slide 342 and the fifth clamping platform 205 thereon to the first floor; the switching servo slide 372 connects to the second traction wheel 26 on the fifth clamping platform 205 via the second traction positioning block 3726, and moves the fifth clamping platform 205 to the middle position of the switching storage location 37; subsequently, the second-floor hoisting assembly 332 transports the second-floor servo slide 342 back to the second floor; the ground sliding assembly 35 moves the ground servo slide 36 to the vicinity of the switching storage location 37; and the switching servo slide 372 transfers the fifth clamping platform 205 to the ground servo slide 321. On the slide 36; the ground sliding assembly 35 transports the ground servo slide 36 and the fifth clamping platform 205 on it to the vicinity of the fifth storage location 325, and transfers the fifth clamping platform 205 into the fifth storage location 325; subsequently, the ground sliding assembly 35 moves the ground servo slide 36 away; the first floor hoisting assembly 331 moves the first floor servo slide 341 to the first floor, and transfers the fifth clamping platform 205 in the fifth storage location 325 onto the first floor servo slide 341; finally, the first floor hoisting assembly 331 moves the first floor servo slide 341 and the fifth clamping platform 205 on it to the second floor, and transfers the fifth clamping platform 205 into the first storage location 321.

[0064] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a conventional manner in the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention using the methods and techniques disclosed above, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the present invention's technical solutions still fall within the protection scope of the present invention.

Claims

1. A device for intelligent switching of multiple car models produced on a single automotive door ring line, characterized in that: It includes a four-sided heavy-duty turntable, a fixture platform, a double-layer fixture library, an loading robot, a welding robot, and an unloading robot. The four-sided heavy-duty turntable is fixedly installed on the ground to the left of the double-layer fixture library. The fixture platform is installed on the four-sided heavy-duty turntable and the double-layer fixture library and can slide and switch between the four-sided heavy-duty turntable and the double-layer fixture library. The loading robot is installed on the lower left side of the four-sided heavy-duty turntable to automatically load parts onto the fixture platform located on the four-sided heavy-duty turntable. The unloading robot is installed on the lower right side of the four-sided heavy-duty turntable to automatically unload parts from the fixture platform located on the four-sided heavy-duty turntable. The welding robot is installed above the four-sided heavy-duty turntable to automatically weld the workpieces located on the fixture platform located on the four-sided heavy-duty turntable. A total of 1 to 10 fixture platforms are provided to realize the switching production of up to ten different car models corresponding to the fixture platforms.

2. The device for intelligent switching of multiple car models on a shared production line as described in claim 1, characterized in that: The four-sided heavy-duty rotary table includes a heavy-duty rotary table, a rotating tetrahedral frame, clamping components, and a fixture platform fixing component. The heavy-duty rotary table is installed on the ground. The rotating tetrahedral frame is set on the heavy-duty rotary table and can rotate with the heavy-duty rotary table to achieve switching between four workstation positions. The clamping components are set on the rotating tetrahedral frame, and four sets of clamping components are provided for clamping the fixture platform and realizing the pneumatic and electrical connection between the fixture platform and the four-sided heavy-duty rotary table. The fixture platform fixing component is set on the rotating tetrahedral frame, and four sets of fixture platform fixing components are provided for bearing, positioning, and fixing the fixture platform.

3. The device for intelligent switching of multiple car models on a shared production line as described in claim 2, characterized in that: The clamping assembly includes a clamping cylinder, a clamping seat, a clamping block, a thrust cylinder, and a first pneumatic-electric module interface. The clamping cylinder is mounted on the rotating tetrahedral frame via the clamping seat. Each clamping assembly contains two sets of clamping cylinders. The clamping block is mounted on the movable end of the clamping cylinder to fix and clamp the fixture platform under the drive of the clamping cylinder. The thrust cylinder is mounted on the rotating tetrahedral frame, and the first pneumatic-electric module interface is located on the thrust cylinder to connect with a corresponding interface on the fixture platform under the drive of the thrust cylinder, thereby realizing the pneumatic-electric connection between the fixture platform and the tetrahedral heavy-duty rotary table.

4. The device for intelligent switching of multiple car models on a shared production line as described in claim 3, characterized in that: The clamping platform fixing assembly includes a fixing frame, universal balls, mounting blocks, clamping modules, a first positioning module, a first guiding module, a vehicle model sensor, a sensor support, and a first limiting block. The fixing frame is fixedly disposed on the four sides of the rotating tetrahedral frame. The universal balls are mounted and fixed to the fixing frame via the mounting blocks. The universal balls are arranged in three rows and six columns to enable the clamping platform to slide on the clamping platform fixing assembly and to support the clamping platform. The first guiding module is mounted and fixed in the middle of the fixing frame. The first guiding module is arranged in two rows and five columns to guide the sliding process of the clamping platform. The vehicle model sensor is mounted on the fixing frame via the sensor support to sense the vehicle model information corresponding to the clamping platform. The clamping module is installed on the left and right sides of the fixing frame to clamp and fix the clamping platform. The first positioning module is installed on the left and right sides of the fixing frame to position the clamping platform. The first limiting block is disposed on the fixing frame to limit the sliding position of the clamping platform.

5. The device for intelligent switching of multiple car models on a shared production line as described in claim 1, characterized in that: The double-layer fixture library includes a double-layer fixture library frame, double-layer fixture storage positions, floor hoisting components, floor servo slides, ground sliding components, ground servo slides, and switching storage positions. The double-layer fixture library frame is located on the right side of the four-sided heavy-duty turntable, and the double-layer fixture library frame is configured as a double-layer structure. Three sets of double-layer fixture storage positions are arranged on the first layer of the double-layer fixture library frame, and four sets are arranged on the second layer of the double-layer fixture library frame, for storing the fixture platform.

6. The device for intelligent switching of multiple car models on a shared production line as described in claim 5, characterized in that: The dual-layer fixture storage location includes a first storage location, a second storage location, a third storage location, a fourth storage location, a fifth storage location, a sixth storage location, and a seventh storage location; wherein, the fifth storage location is an empty storage location, used for transferring the fixture platform from the second layer to the first layer or from the first layer to the second layer during the fixture platform switching process.

7. The device for intelligent switching of multiple car models on a shared production line as described in claim 6, characterized in that: The floor hoisting assembly comprises two sets, including a first floor hoisting assembly and a second floor hoisting assembly. The first floor hoisting assembly and the second floor hoisting assembly are respectively positioned at corresponding locations on the double-layer fixture library frame and cooperate with corresponding double-layer fixture spaces to realize the vertical movement of the floor servo slide. The floor servo slide comprises two sets, including a first floor servo slide and a second floor servo slide. The first floor servo slide is mounted on the first floor hoisting assembly, and the second floor servo slide is mounted on the second floor hoisting assembly. The floor servo slide and the double-layer fixture library frame... The fixture storage unit is configured to move the fixture platform in the double-layer fixture storage unit to the floor servo slide and further to the first or second floor via the floor hoisting assembly. The ground sliding assembly is installed in the middle of the double-layer fixture storage frame. The ground servo slide is installed on the ground sliding assembly and can move along the ground sliding assembly to realize the transfer of the fixture platform to the switching storage unit. The switching storage unit is set in the first layer of the double-layer fixture storage frame to realize the movement and docking of the fixture platform between the four-sided heavy-duty turntable and the double-layer fixture storage unit.

8. The device for intelligent switching of multiple car models on a shared production line as described in claim 7, characterized in that: The switching storage location includes a switching storage location fixing component, a switching servo slide, a second guide module, and a second positioning module. The switching servo slide can slide on the switching storage location fixing component to realize the switching and transfer of the fixture platform between the ground servo slide and the four-sided heavy-duty turntable. The second guide module is installed on the switching storage location fixing component to realize the sliding guidance of the fixture platform on the switching storage location. The second positioning module is located at the middle position of the switching storage location fixing component to position the fixture platform at the middle position of the switching storage location fixing component so that the switching servo slide can push the fixture platform from the left or right to move it to the ground servo slide or the four-sided heavy-duty turntable.

9. The device for intelligent switching of multiple car models on a shared production line as described in claim 8, characterized in that: The switching storage location fixing assembly includes a storage location fixing seat, a sliding rail, a rack, a second limiting block, a third limiting block, and a cable chain. The storage location fixing seat is fixedly installed on the ground. The sliding rail is installed on both sides of the middle part of the storage location fixing seat, and the rack is installed in the middle position of the storage location fixing seat. The second limiting block is installed at one end of the storage location fixing seat to limit the movement of the switching servo slide and prevent the switching servo slide from sliding out of the safe position. The third limiting block is installed at the other end of the storage location fixing seat to limit the movement of the switching servo slide and prevent the switching servo slide from sliding out of the safe position. One end of the cable chain is installed on the switching servo slide, and the other end of the cable chain is installed on the storage location fixing seat to protect the electrical circuits connected to the switching servo slide.

10. The device for intelligent switching of multiple car models on a shared production line as described in claim 9, characterized in that: The switching servo slide includes a slide motor, a motor base, a rolling gear, a slide plate, a first traction positioning block, a second traction positioning block, a first lifting cylinder, a second lifting cylinder, a fourth limit block, and a fifth limit block. The slide motor is mounted on the slide plate via the motor base. The rolling gear is mounted on the output end of the slide motor and can mesh with the rack under the drive of the slide motor, thereby driving the slide plate to move along the sliding rail. The slide plate is set on the sliding rail to realize the sliding of the switching servo slide on the switching position fixing assembly. The first traction positioning block is mounted on the first lifting cylinder. A cylinder is installed on the left side of the slide plate. The first traction positioning block can move up and down under the drive of the first lifting cylinder and can cooperate with the first traction wheel on the fixture platform. The second traction positioning block is installed on the second lifting cylinder. The second traction positioning block can move up and down under the drive of the second lifting cylinder and can cooperate with the second traction wheel on the fixture platform. The fourth limiting block is disposed on the left side of the slide plate and cooperates with the second limiting block to limit the movement position of the slide plate. The fifth limiting block is disposed on the right side of the slide plate and cooperates with the third limiting block to limit the movement position of the slide plate.

11. The device for intelligent switching of multiple car models on a shared production line as described in claim 10, characterized in that: The clamping platform includes an L-shaped clamping platform frame, a sliding plate, a first traction wheel, a first positioning bushing, a second positioning bushing, a second traction wheel, a vehicle model sensing block, a sixth limiting block, and a second pneumatic / electrical interface. The sliding plate is located below the L-shaped clamping platform frame and is used to form sliding contact with the clamping platform fixing components, the switching storage location, the double-layer clamping storage location, the floor servo slide, and the ground servo slide. The first traction wheel and the second traction wheel are respectively located on the corresponding sides of the L-shaped clamping platform frame and are used to cooperate with the first traction positioning block and the second traction positioning block respectively to realize the traction into and out of the clamping platform and the switching transfer. The first positioning bushing and the second positioning bushing are located on the L-shaped clamp. Below the platform frame, positioning pins are used to cooperate with the switching storage location, the double-layer fixture storage location, the fixture platform fixing component, the floor servo slide, and the ground servo slide to achieve the fixing and positioning of the fixture platform; the vehicle model sensing block is set on the L-shaped fixture platform frame and can cooperate with the vehicle model sensor to achieve vehicle model production identification; the sixth limiting block is set on one side of the L-shaped fixture platform frame and can cooperate with the first limiting block on the four-sided heavy-duty turntable to achieve the limiting of the fixture platform; the second pneumatic and electrical interface is set on one side of the L-shaped fixture platform frame and can cooperate with the first pneumatic and electrical module interface to achieve the pneumatic and electrical connection between the fixture platform and the four-sided heavy-duty turntable.

12. The device for intelligent switching of multiple car models on a shared production line according to any one of claims 1 to 11, characterized in that: The fixture platform comprises 10 units, including a first fixture platform, a second fixture platform, a third fixture platform, a fourth fixture platform, a fifth fixture platform, a sixth fixture platform, a seventh fixture platform, an eighth fixture platform, a ninth fixture platform, and a tenth fixture platform. The first fixture platform is positioned at the first storage location, the second fixture platform at the second storage location, the third fixture platform at the third storage location, the fourth fixture platform at the fourth storage location, the sixth fixture platform at the sixth storage location, and the seventh fixture platform at the seventh storage location. The fifth, eighth, ninth, and tenth fixture platforms are respectively mounted on four sets of fixture platform fixing assemblies on the four-sided heavy-duty turntable.

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