Full-automatic front floor production line

Abstract

The invention discloses a full-automatic front floor production line which comprises a body assembling unit used for gluing a front floor sub-assembly and a central channel assembly and then assembling the front floor sub-assembly and the central channel assembly into a front floor body through spot welding, and transferring the front floor body to a cross beam assembling unit; the cross beam assembling unit is used for assembling a seat cross beam and a front floor body into a first product through spot welding and transferring the first product to the repair welding assembling unit; the repair welding assembly unit is used for performing repair welding on the product I to form a product II; the stud assembling unit is used for grabbing the second product to weld the stud to obtain a third product and transferring the third product to the arc welding assembling unit; the arc welding assembly unit is used for carrying out arc welding on the third product to obtain a finished product and transferring the finished product to the detection offline unit; and the detection off-line unit is used for carrying out welding detection on the finished products and off-line qualified products detected to be qualified. Automatic welding and assembling of the front floor are achieved, the flexibility of the whole production line is high, and the production changing time is greatly shortened; and the non-processing time is reduced, and the whole production takt is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive front floor welding technology, and more particularly to a fully automated front floor production line. Background Technology

[0002] The front floor assembly is a core structural component of the front underside of the vehicle body, primarily responsible for support, connection, and safety functions. It is typically assembled into a single unit by welding together the front floor body (including integral and split types), the central tunnel assembly, and seat crossbeams. Currently, front floor assembly welding production lines mostly employ a "multi-spot welding machine + robotic welding" model. This type of production line suffers from the following technical bottlenecks: First, while large multi-spot welding machines are highly efficient, they require a large floor space and involve high investment. Furthermore, the complex fixture adjustments during vehicle model changes result in insufficient production line flexibility and difficulty in increasing cycle time. Second, the front floor assembly typically involves multiple processes such as spot welding, arc welding, and adhesive application. The existing model, limited by the multi-spot welding machine structure, disperses these process devices throughout the production line according to assembly steps, leading to numerous workpiece transfers and positioning steps, resulting in significant cumulative errors. Therefore, a front floor assembly production line with high flexibility and fast production cycle time is needed to meet the production needs of various current vehicle models. Summary of the Invention

[0003] This invention provides a fully automated front floor production line to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A fully automated front floor production line includes: The body assembly unit is used to apply adhesive to the front floor sub-assembly and the central tunnel assembly and spot weld them together to form the front floor body, and then transfer the front floor body to the crossbeam assembly unit. The crossbeam assembly unit is used to spot weld the seat crossbeam and the front floor body into product one, and then transfer product one to the repair welding assembly unit. The welding repair assembly unit is used to weld product one into product two. The stud assembly unit is used to pick up the welding stud of product two to obtain product three, and then transfer product three to the arc welding assembly unit; The arc welding assembly unit is used to perform arc welding on product three to obtain the finished product, and then transfer the finished product to the inspection and off-line unit; The inspection and removal unit is used to perform welding inspection on finished products and remove qualified products from the production line.

[0005] Beneficial effects: The fully automated front floor production line disclosed in this application, by setting up a body assembly unit, a crossbeam assembly unit, a repair welding assembly unit, a stud assembly unit, an arc welding assembly unit, and an inspection and unloading unit, can realize automated welding and assembly of the front floor. The entire production line has high flexibility and can significantly shorten changeover time. At the same time, this layout allows multiple robots to work collaboratively around a platform, avoiding frequent product transfers and repetitive positioning, reducing non-processing time, and effectively improving the overall production cycle time. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] Figure 1 This is a schematic diagram of the layout of a fully automated front floor production line disclosed in this invention; Figure 2 This is a schematic diagram of the structure of a front floor sub-assembly loading vehicle for a fully automated front floor production line disclosed in this invention; Figure 3 This is a rear view of the central aisle assembly loading vehicle of a fully automated front floor production line disclosed in this invention. Figure 4 This is a side view of the central aisle assembly loading vehicle of a fully automated front floor production line disclosed in this invention; Figure 5 This is a bottom view of the central aisle assembly loading vehicle of a fully automated front floor production line disclosed in this invention; Figure 6 This is a schematic diagram of the central base mechanism of a fully automated front floor production line disclosed in this invention; Figure 7 This is a schematic diagram of the central clamping mechanism of a fully automated front floor production line disclosed in this invention. Figure 8 This is a schematic diagram of the structure of the first slide fixture in a fully automated front floor production line disclosed in this invention. Figure 1 ; Figure 9 This is a schematic diagram of the structure of the first slide fixture in a fully automated front floor production line disclosed in this invention. Figure 2 ; Figure 10 This is a schematic diagram of the first slide clamping mechanism of a fully automated front floor production line disclosed in this invention. Figure 11This is a schematic diagram of the stud welding machine for a fully automated front floor production line disclosed in this invention; Figure 12 This is a schematic diagram of the flipping platform clamping of a fully automated front floor production line disclosed in this invention. Figure 13 This is a schematic diagram of the structure of a flipping platform in a fully automated front floor production line disclosed in this invention; Figure 14 This is a schematic diagram of the structure of the fourth slide fixture of a fully automated front floor production line disclosed in this invention; Figure 15 This is a schematic diagram of the automatic grinding station of a fully automated front floor production line disclosed in this invention.

[0008] In the diagram: 1. Main assembly unit; 11. Front floor sub-assembly loading trolley; 111. Front floor platform; 112. Support component; 113. Front floor positioning pin; 114. Front floor positioning pin lifting drive; 115. First inspection mounting bracket; 1151. First laser sensor; 1152. Second laser sensor; 1153. Third laser sensor; 116. Second inspection mounting bracket; 1161. Fourth laser sensor; 12. Central aisle assembly loading trolley; 121. Central base. Mechanism; 1211, Central Base; 12111, Pad Support Beam; 12112, Lateral Reinforcing Beam; 12113, Guide Wheel Support Beam; 1212, Central Guide Wheel; 1213, Central Guide Block; 12131, Central Guide Inclined Surface; 1214, Central Pad; 12141, Central Support Inclined Surface; 12142, Central Support Plane; 1215, Central Positioning Pin Hole; 1216, Central Limiting Block Mounting Base; 1217, Central Limiting Block; 1218, Central Clamp 12191. Tightening cylinder; 12192. Leveling mounting base; 12193. Leveling support leg; 12194. Leveling bolt; 12195. Leveling nut; 122. Central clamping mechanism; 1221. Central clamping connecting plate; 1222. Central guide plate; 1223. Central load-bearing wheel; 1224. Central positioning pin; 1225. Central positioning plate; 1226. Central locking block; 1227. Central transfer wheel; 123. Central base mounting base; 13. Handling and gluing robot; 14. 141. First slide table fixture; 1411. First slide table base mechanism; 1412. First slide table guide wheel; 1413. First slide table track; 1414. First slide table pad; 142. First slide table fixture mechanism; 1421. First slide table fixture connecting plate; 1422. First slide table guide plate; 1423. First slide table load-bearing wheel; 1426. First slide table locking block; 1427. First slide table transfer wheel; 15. First spot welding robot; 16. Seven-axis robot; 2. Crossbeam assembly unit; 21. Second slide table fixture; 22. Second spot welding robot; 23. First handling robot; 3. Repair welding assembly unit; 31. Repair welding platform; 32. Third spot welding robot; 4. Stud assembly unit; 41. Second handling robot; 42. Stud welding machine; 421. Welding machine bracket; 422. Welding torch mounting bracket; 423. Welding torch; 424. Welding machine drive cylinder; 43. Flipping platform; 431. Flipping base; 432. Flipping bracket; 433. Flipping fixture; 44. Third handling robot; 5. Arc welding assembly unit; 51. Third slide fixture; 52. Arc welding robot; 53. Fourth handling robot; 6. Inspection unit; 61. Inspection platform; 62. Inspection equipment; 63. Inspection and handling robot; 64. Fourth slide table fixture; 641. Fourth slide table base mechanism; 6411. Fourth slide table base; 6412. Fourth slide table support column; 6413. Fourth slide table guide rail; 642. Fourth slide table fixture mechanism; 6421. Fourth slide table fixture plate; 6422. Fourth slide table transfer wheel; 7. Automatic grinding station; 71. Grinding machine frame; 72. Floating assembly; 73. Grinding motor; 74. Grinding head. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, 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.

[0010] A fully automated front floor production line, combined with Figures 1-15As shown, the assembly includes: a body assembly unit 1, used to apply adhesive to the front floor sub-assembly and the central tunnel assembly and spot weld them together to form the front floor body, and then transfer the front floor body to the crossbeam assembly unit 2; the crossbeam assembly unit 2, used to spot weld the seat crossbeam and the front floor body together to form Product 1, and then transfer Product 1 to the repair welding assembly unit 3; the repair welding assembly unit 3, used to repair welding Product 1 to form Product 2; a stud assembly unit 4, used to pick up the welding studs of Product 2 to obtain Product 3, and then transfer Product 3 to the arc welding assembly unit 5; the arc welding assembly unit 5, used to perform arc welding on Product 3 to obtain the finished product, and then transfer the finished product to the inspection and off-line unit 6; the inspection and off-line unit 6, used to perform welding inspection on the finished product and remove the qualified products that pass the inspection from the line. This application enables automated welding assembly of the front floor by setting up a main body assembly unit 1, a crossbeam assembly unit 2, a repair welding assembly unit 3, a stud assembly unit 4, an arc welding assembly unit 5, and an inspection and off-line unit 6. The entire production line has high flexibility and can significantly shorten changeover time. At the same time, this layout allows multiple robots to work collaboratively around a platform, avoiding frequent product transfers and repetitive positioning, reducing non-processing time, and effectively improving the overall production cycle time.

[0011] Preferably, the body assembly unit 1 includes: a front floor sub-assembly loading trolley 11, a central channel assembly loading trolley 12, a handling and gluing robot 13, a first sliding table fixture 14, a first spot welding robot 15, and a seven-axis robot 16; the front floor sub-assembly loading trolley 11 is used to handle and position the front floor sub-assembly, the central channel assembly loading trolley 12 is used to handle and position the central channel assembly, the handling and gluing robot 13 is used to grab the front floor sub-assembly and the central channel assembly respectively, clamp them on the first sliding table fixture 14, and apply glue to the front floor sub-assembly and the central channel assembly, the first sliding table fixture 14 is used to clamp the front floor sub-assembly and the central channel assembly and move them to the welding area of ​​the first spot welding robot 15, the first spot welding robot 15 is used to spot weld the front floor sub-assembly and the central channel assembly on the first sliding table fixture 14 to form the front floor body, and the seven-axis robot 16 is used to grab the front floor body on the first sliding table fixture 14 and transfer it to the crossbeam assembly unit 2. The front floor assembly loading cart 11 and the central channel assembly loading cart 12 are used for loading. Then, the front floor assembly and the central channel assembly are coated with adhesive by the handling and gluing robot 13. The components are then gripped and clamped onto the first sliding table fixture 14. During subsequent spot welding, the workpieces do not need to be clamped again; they are moved directly by the first sliding table fixture 14. After spot welding, they are transferred by the seven-axis robot 16. The first spot welding robot 15 uses six-axis industrial robots. Two six-axis industrial robots equipped with hollow wrist robotic spot welding guns complete standard spot welding operations. The controller of the first spot welding robot 15 integrates a real-time weld quality monitoring unit. By monitoring the dynamic resistance curve and inter-electrode pressure changes during the welding process in real time and comparing them with a preset ideal model, the quality of each weld point is judged in real time. By monitoring the dynamic parameters of each weld point in real time and making immediate judgments, a shift from "outcome inspection" to "process prevention" is achieved, greatly reducing the defect rate of incomplete welds and missing welds, and significantly improving welding quality.

[0012] Preferably, the front floor sub-assembly loading trolley 11 includes: a front floor platform 111, a front floor support component, a front floor positioning component, and a front floor detection component; the front floor support component includes multiple support members 112 disposed on the front floor platform 111, which support the front floor sub-assembly; the front floor positioning component includes multiple front floor positioning pins 113 and a number of front floor positioning pin lifting drivers 114 equal to the number of front floor positioning pins 113, which are disposed on the front floor platform 111 and drive the front floor positioning pins 113 to insert into the first positioning hole of the front floor sub-assembly for positioning; the front floor detection component includes multiple support members 112 disposed on the front floor platform 111, which support the front floor sub-assembly; the front floor detection component includes multiple support members 112 disposed on the front floor platform 111, which support the front floor sub-assembly; the front floor support ... The platform 111 has a first testing mounting bracket 115 and a second testing mounting bracket 116. The first testing mounting bracket 115 is equipped with a first laser sensor 1151, a second laser sensor 1152, and a third laser sensor 1153. The beam of the first laser sensor 1151 is aligned with the second positioning hole on the front floor sub-assembly, the beam of the second laser sensor 1152 is aligned with the third positioning hole on the front floor sub-assembly, and the beam of the third laser sensor 1153 is aligned with the fourth positioning hole on the front floor sub-assembly. The second testing mounting bracket 116 is equipped with a fourth laser sensor 1161, and the beam of the fourth laser sensor 1161 is aligned with the fifth positioning hole on the front floor sub-assembly. The first positioning hole is a vertical hole on the front floor sub-assembly, which allows for precise positioning after the front floor positioning pin 113 is inserted. The second positioning hole is a vertical hole on the front floor sub-assembly, the third positioning hole is a horizontal hole on the front floor sub-assembly, and the fourth positioning hole is a horizontal hole on the front floor sub-assembly and is set perpendicular to the third positioning hole. The three-dimensional spatial direction is detected by the first laser sensor 1151, the second laser sensor 1152, and the third laser sensor 1153, which facilitates the installation and post-positioning inspection of the front floor sub-assembly.

[0013] Specifically, the front floor positioning pin lifting driver 114 uses a cylinder and is fixed to the upper surface of the front floor platform 111. The front floor positioning pin lifting driver 114 drives the front floor positioning pin 113 to rise and fall. In this embodiment, a side plate of a front floor sub-assembly is positioned by two diagonally opposite front floor positioning pins 113, thereby enabling the handling and gluing robot 13 to accurately grasp it. The front floor sub-assembly loading trolley 11 integrates high-precision positioning pins and clamping structures, adopts a modular design, and can be quickly adapted to the assembly of front floor assemblies of different vehicle models by replacing specific positioning modules.

[0014] Preferably, the central channel assembly loading car 12 includes a central base mechanism 121 and a central clamping mechanism 122. The central base mechanism 121 includes a central base 1211, a central guide wheel assembly located in the middle of the central base 1211, and a central guide block 1213 located at the front end of the central guide wheel assembly. The guide wheel assembly includes multiple pairs of central guide wheels 1212 arranged along the docking direction. The central guide block 1213 includes two opposing central guide inclined surfaces 12131. A guide channel is formed between the two central guide inclined surfaces 12131. The opening of the guide channel away from the central guide wheel assembly is wider than the opening towards the central guide wheel assembly. The central clamping mechanism 122 includes a central clamping connecting plate 1221 and a central guide plate 1222 fixed below the central clamping connecting plate 1221. The central guide plate 1222 is arranged along the docking direction. When the central clamping mechanism 122 docks with the central base mechanism 121 along the docking direction, the central guide plate 1222 is first inserted into the guide channel and then guided to be inserted sequentially between each pair of central guide wheels 1212 of the central guide wheel group. Each pair of central guide wheels 1212 abuts against and rolls from both sides of the central guide plate 1222. This application limits the tilt angle of the central guide plate 1222 by setting a central guide block 1213 and guides the central guide plate 1222, so that the central guide plate 1222 can initially align with the central guide wheel assembly. Subsequently, the central guide plate 1222 can reliably achieve docking guidance under the synergistic effect of the central guide block 1213 and the central guide wheel assembly. Furthermore, since the central guide plate 1222 passes through the central guide block 1213 first, it can avoid collision between the central guide plate 1222 and the central guide wheel assembly, which is conducive to ensuring the reliability and stability of the quick-change structure during long-term use.

[0015] Specifically, various cylinder-driven lever-type clamps are installed on the central clamp connecting plate 1221, and the design and arrangement are based on the characteristics of each vehicle model. This technology is existing technology and will not be described in detail here.

[0016] Specifically, the central guide block 1213 includes a guide base plate and two guide inclined posts fixed on the guide base plate. The two guide inclined posts are arranged opposite each other, perpendicular to the guide base plate and forming an included angle with each other, and gradually approach each other along the docking direction. The inner surfaces of the two guide inclined posts facing each other are the central guide inclined surfaces 12131, and the two guide inclined posts are rounded at all four corners. The guide base plate and the guide inclined posts are integrally formed, and the guide base plate is provided with screw holes. The guide base plate is fixedly connected to the central base 1211 by screws.

[0017] Specifically, the central guide wheel 1212 is rotatably connected to the Z-shaped seat, the Z-shaped seat is fixed to the guide wheel mounting plate by screws, and the guide wheel mounting plate is fixed to the central base 1211 by welding. A Z-shaped seat is provided at each end of the guide wheel mounting plate, so that the two central guide wheels 1212 are spaced apart to allow the central guide plate 1222 to pass through.

[0018] Specifically, a central pad 1214 is also fixed on the central base 1211. The central pad 1214 includes a central support inclined surface 12141 and a central support plane 12142. The central support inclined surface 12141 and the central support plane 12142 are arranged sequentially along the docking direction, and the distance between the central support inclined surface 12141 and the central base 1211 gradually increases along the docking direction. A central load-bearing roller 1223 is also fixed below the central clamp connecting plate 1221. When the central clamp mechanism 122 mates with the central base mechanism 121 in the mating direction, the central load-bearing roller 1223 rolls along the central support inclined surface 12141 to the central support plane 12142. By rolling the central load-bearing roller 1223 along the central support inclined surface 12141 to the central support plane 12142, the central load-bearing roller 1223 acts on the central support plane 12142 to support the central clamp connecting plate 1221.

[0019] Specifically, the central pad 1214 is a long plate with a wedge-shaped front end and a row of countersunk holes along its length. The central pad 1214 is fixed to the upper surface of the central base 1211 by screws. The central load-bearing wheel 1223 is made of iron to improve its load-bearing capacity.

[0020] Specifically, a central positioning pin hole 1215 is provided on the central base 1211, and a central positioning pin 1224 is provided on the central clamp connecting plate 1221. The central positioning pin 1224 is inserted into the central positioning pin hole 1215 for positioning.

[0021] Specifically, the upper surface of the central base 1211 has two central positioning pin holes 1215, one of which is a round hole and the other is an elongated hole, so as to make position adjustments.

[0022] Specifically, the central positioning pin 1224 includes: a right-angle pin seat fixed to the lower surface of the central clamp connecting plate 1221 by screws; a pin seat fixed to the right-angle pin seat by screws; and a pin installed in the pin hole of the pin seat. The pin seat is located on the outer front end of the central clamp connecting plate 1221 for easy operation. The pin seat has a vertical pin hole and a sliding groove on its side, including a vertical sliding groove and a horizontal sliding groove connecting the pin hole of the pin seat. The pin includes a vertical conical pin and a horizontal handle. The conical pin is located in the pin hole of the pin seat, and the handle moves in the sliding groove. When the handle slides to the bottom along the vertical sliding groove, the conical pin extends out of the pin hole of the pin seat; when the handle slides upward along the vertical sliding groove to the horizontal sliding groove and rotates to the horizontal sliding groove, the conical pin is lifted by the handle and retracts into the pin hole of the pin seat.

[0023] Specifically, a central limiting block mounting base 1216 is fixed on the central base 1211, a central limiting block 1217 is fixed on the central limiting block mounting base 1216, and a central positioning plate 1225 is fixed on the central clamp connecting plate 1221. The central positioning plate 1225 abuts against the central limiting block 1217 for limiting. The central base 1211 is also equipped with a central clamping cylinder 1218, and the central clamping connecting plate 1221 is also fixed with a central locking block 1226. The central clamping cylinder 1218 applies clamping force to the central locking block 1226, so that the central positioning plate 1225 abuts against the central limiting block 1217, thereby achieving precise and reliable limitation of the position of the central base 1211.

[0024] Specifically, the central limiting block mounting base 1216 is L-shaped, and its bottom is fixedly connected to the central base 1211 by screws. The central limiting block 1217 is fixedly connected to the upper part of the central limiting block mounting base 1216 by screws. The central limiting block 1217 includes a limiting boss, and positioning inclined surfaces are provided on both sides of the limiting boss. The central positioning plate 1225 is provided with a positioning block, and the positioning block has a limiting groove. The limiting groove and the two positioning inclined surfaces of the limiting boss are engaged to achieve precise positioning. In this embodiment, the central clamping cylinder 1218 is an Airtac welded clamping cylinder. When the central clamping cylinder 1218 is activated, its rocker arm rises and acts on the central locking block 1226.

[0025] Specifically, the central base 1211 is also provided with a leveling component for adjusting the level of the central base 1211. The leveling component includes at least three sets of leveling components, which are arranged in a triangular pattern. The leveling components include: a leveling fixing seat 12191, a leveling support leg 12192, a leveling bolt 12193, and a leveling nut 12194. The leveling fixing seat 12191 is fixed on the central base 1211. The leveling bolt 12193 is threadedly connected to the leveling fixing seat 12191 and passes through the leveling fixing seat 12191 before being fixedly connected to the leveling support leg 12192. The leveling nut 12194 is threadedly connected to the leveling bolt 12193 to lock the leveling bolt 12193. By loosening the leveling nut 12194, the leveling bolt 12193 can be adjusted, thereby adjusting the vertical distance between the leveling support leg 12192 and the leveling fixing seat 12191, thus achieving leveling through at least three sets of leveling components.

[0026] Specifically, six sets of leveling components are provided: two sets at the front of the central base 1211, two sets at the middle of the central base 1211, and two sets at the rear of the central base 1211. Leveling nuts 12194 are positioned above the leveling fixing base 12191 for easy tightening and loosening. The leveling fixing base 12191 is fixed to the central base 1211 by screws and has threaded through holes. The leveling bolts 12193 are screwed through the threaded through holes and then fixed to the leveling support legs 12192 by countersunk screws.

[0027] Specifically, the central base 1211 is also provided with a central base fixing seat 123, which has a through hole and is used to fix the central base 1211 by means of fasteners.

[0028] Specifically, the central base fixing seat 123 is L-shaped, with a through hole at its bottom for anchor bolts or expansion bolts to pass through. The upper part of the central base fixing seat 123 is welded and fixed to the side of the leveling fixing seat 12191. When the leveling support leg 12192 is raised and lowered, the central base fixing seat 123 is raised and lowered together with the leveling fixing seat 12191.

[0029] Specifically, the central base 1211 includes: two pad support beams 12111, two transverse reinforcing beams 12112, and one guide wheel support beam 12113. The two pad support beams 12111 and the one guide wheel support beam 12113 are arranged in parallel and along the docking direction. The guide wheel support beam 12113 is located between the two pad support beams 12111. The two transverse reinforcing beams 12112 are arranged in parallel between the two pad support beams 12111. The two ends of the transverse reinforcing beams 12112 are fixedly connected to the two pad support beams 12111 respectively. The guide wheel support beam 12113 intersects with and is fixedly connected to the two transverse reinforcing beams 12112. The central guide wheel assembly is mounted on the guide wheel support beam 12113, and the central guide block 1213 is mounted on the guide wheel support beam 12113. Each pad support beam 12111 is fixed with a central pad 1214 and a central limiting block mounting seat 1216. The central clamping cylinder 1218 and leveling components are also mounted on the pad support beam 12111. In this embodiment, there are a total of four central load-bearing wheels 1223, with two central load-bearing wheels 1223 corresponding to one central pad 1214. The structure of the central base 1211 is welded, which can reduce the structural weight while ensuring structural strength, facilitate transfer and installation, and avoid damaging the factory floor.

[0030] Specifically, the front end of the guide wheel support beam 12113 is T-shaped to facilitate the installation of the central guide block 1213. The guide wheel support beam 12113 and the transverse reinforcing beam 12112 are designed with a snap-fit ​​structure for splicing and welding, thereby reducing the height of the central base 1211. Furthermore, a clearance space is formed between the guide wheel support beam 12113 and the two pad support beams 12111, which can accommodate work shoes, making it convenient for workers to stand when loading and unloading parts without needing to step on the central clamp connecting plate 1221.

[0031] Specifically, at least three central transfer wheels 1227 are provided below the central clamp connecting plate 1221. These wheels support the movement of the central clamp connecting plate 1221, and the central load-bearing wheel 1223 rolls onto the central support plane 12142, causing it to lift off the ground. In this embodiment, four central transfer wheels 1227 are distributed at the four corners of the central clamp connecting plate 1221, allowing the central clamp connecting plate 1221 to be moved. When the central transfer wheel 1227 contacts the factory floor, the height of the central load-bearing wheel 1223 corresponds to the central support ramp 12141; when the central load-bearing wheel 1223 rolls onto the central support plane 12142, it lifts off the ground, and the entire weight of the central clamp mechanism 122 is supported by the central load-bearing wheel 1223. The central transfer wheels 1227 are lockable casters.

[0032] The central base mechanism 121 and the central clamping mechanism 122 of this application adopt the principle of positioning with one side and two pins, which is simple and reliable. After docking, the central load-bearing wheel 1223 bears the weight and the central transfer wheel 1227 is suspended in the air, ensuring the stability of the dimensions in the vertical direction.

[0033] Preferably, the first slide table clamp 14 includes: a first slide table base mechanism 141 and a first slide table clamp mechanism 142. The first slide table base mechanism 141 includes: a first slide table base 1411, a first slide table guide wheel assembly disposed in the middle of the first slide table base 1411, a first slide table track 1413, and a first slide table drive mechanism for driving the first slide table base 1411 to slide along the first slide table track 1413. The first slide table guide wheel assembly includes multiple pairs of first slide table guide wheels 1412 disposed along the sliding direction of the first slide table track 1413. The first slide table clamping mechanism 142 includes: a first slide table clamping connecting plate 1421 and a first slide table guide plate 1422 fixed below the first slide table clamping connecting plate 1421. The first slide table guide plate 1422 is arranged along the sliding direction of the first slide table track 1413. When the first slide table clamping mechanism 142 is connected to the first slide table base mechanism 141 along the sliding direction of the first slide table track 1413, the first slide table guide plate 1422 is inserted between each pair of first slide table guide wheels 1412 of the first slide table guide wheel group. Each pair of first slide table guide wheels 1412 abuts against and rolls from both sides of the first slide table guide plate 1422. This application achieves reliable docking guidance through the coordinated action of the first slide guide plate 1422 and the first slide guide wheel group. The first slide base 1411 is driven by the first slide drive mechanism to slide along the first slide track 1413, and then the first slide base 1411 drives the first slide clamping mechanism 142 on it to slide, thereby realizing the movement of the floor sub-assembly and the central channel assembly before clamping.

[0034] Specifically, various cylinder-driven lever-type clamps are installed on the first slide clamp connecting plate 1421, and the design and arrangement are based on the characteristics of each vehicle model. This technology is existing technology and will not be described in detail here.

[0035] Specifically, the first slide guide wheel 1412 is rotatably connected to the first slide base 1411, and the two first slide guide wheels 1412 are spaced apart to allow the first slide guide plate 1422 to pass through.

[0036] Specifically, a first slide base 1411 is also fixedly provided with a first slide pad 1414. The first slide pad 1414 includes a first slide support inclined surface and a first slide support plane. The first slide support inclined surface and the first slide support plane are arranged sequentially along the docking direction, and the distance between the first slide support inclined surface and the first slide base 1411 gradually increases along the docking direction. A first slide table load-bearing roller 1423 is also fixed below the first slide table clamping connecting plate 1421. When the first slide table clamping mechanism 142 docks with the first slide table base mechanism 141 along the docking direction, the first slide table load-bearing roller 1423 rolls along the first slide table support slope to the first slide table support plane. The first slide table load-bearing roller 1423 acts on the first slide table support plane to support the first slide table clamping connecting plate 1421, thereby achieving greater load-bearing capacity and more stable and accurate vertical position.

[0037] Specifically, the first slide base 1411 is provided with a first slide positioning pin hole, and the first slide fixture connecting plate 1421 is provided with a first slide positioning pin. The first slide positioning pin is driven by a cylinder to rise and insert into the first slide positioning pin hole for positioning.

[0038] Specifically, a first slide table limiting block mounting seat is fixed on the first slide table base 1411, a first slide table limiting block is fixed on the first slide table limiting block mounting seat, a first slide table limiting block is fixed on the first slide table clamp connecting plate 1421, a first slide table positioning plate is fixed on the first slide table positioning plate, a V-shaped block is provided on the first slide table positioning plate, and the V-shaped block and the first slide table limiting block are precisely positioned by cooperating with the V-shaped inclined surface; The first slide base 1411 is also provided with a first slide clamping cylinder, and the first slide clamp connecting plate 1421 is also fixed with a first slide locking block 1426. The first slide clamping cylinder applies clamping force to the first slide locking block 1426, so that the V-shaped block on the first slide positioning plate abuts against the first slide limiting block, thereby achieving accurate and reliable limitation of the position of the first slide clamp connecting plate 1421.

[0039] Specifically, four first slide table transfer wheels 1427 are provided below the first slide table clamp connecting plate 1421. The four first slide table transfer wheels 1427 are used to support the movement of the first slide table clamp connecting plate 1421, and the first slide table load-bearing wheel 1423 rolls onto the first slide table support plane, causing the first slide table transfer wheel 1427 to leave the ground.

[0040] Specifically, the first slide rail 1413 includes a ground rail and two linear guide rails mounted on the ground rail. The first slide base 1411 is connected to the slider of the linear guide rails. The first slide drive mechanism adopts a gear and rack structure. A motor is installed on the first slide base 1411, and the rack is installed on the ground rail. The motor drives the gear to rotate, and the rotation of the gear meshes with the rack, thereby driving the first slide base 1411 to slide.

[0041] Preferably, the crossbeam assembly unit 2 includes: a second sliding table fixture 21, a second spot welding robot 22, and a first handling robot 23. The second sliding table fixture 21 is used to clamp the front floor body grasped by the seven-axis robot 16 in the welding area of ​​the second spot welding robot 22. After the second sliding table fixture 21 carries the front floor body to the loading area of ​​the crossbeam assembly unit 2, it clamps the seat crossbeam. The second sliding table fixture 21 carries the front floor body and the seat crossbeam back to the welding area of ​​the second spot welding robot 22, where the second spot welding robot 22 performs spot welding on the front floor body and the seat crossbeam to form product one. The first handling robot 23 is used to grasp product one on the second sliding table fixture 21 and transfer it to the supplementary welding assembly unit 3. Specifically, the structure of the second sliding table fixture 21 is the same as that of the first sliding table fixture 14, and will not be described in detail here. By clamping with the second sliding table fixture 21, the seat crossbeam is clamped onto the front floor body without multiple clamping operations, resulting in more accurate positioning.

[0042] Preferably, the welding repair assembly unit 3 includes a welding repair platform 31 and a third spot welding robot 32. The welding repair platform 31 is used to clamp the product one grasped by the first handling robot 23, and the third spot welding robot 32 is used to weld the product one on the welding repair platform 31 into product two. By setting up the welding repair platform 31 and cooperating with the third spot welding robot 32, spot welding can be performed on the dead corner positions caused by clamping, thereby ensuring the overall welding accuracy and overcoming problems such as welding stress. Specifically, the welding repair platform 31 includes a welding repair base and a clamping component. The clamping component includes a pin positioning, a support column, and a lever-type clamp driven by a cylinder.

[0043] Preferably, the stud assembly unit 4 includes: a second handling robot 41, a stud welding machine 42, a flipping platform 43, and a third handling robot 44. The second handling robot 41 is used to grab the second product on the welding platform 31 and cooperate with the stud welding machine 42 to weld the stud, obtaining a semi-finished product 3. The flipping platform 43 is used to clamp the semi-finished product 3. The third handling robot 44 grabs the semi-finished product 3 on the flipping platform 43, flips it over, and cooperates with the stud welding machine 42 to weld the stud, obtaining a finished product 3. The third handling robot 44 then grabs the finished product 3 and transfers it to the arc welding assembly unit 5. By cooperating with the second handling robot 41 and the third handling robot 44 to the flipping platform 43, the product is flipped. By fully utilizing the second handling robot 41 and the third handling robot 44, the flexible degrees of freedom can be used to grab the second product or the semi-finished product 3 so that the stud welding machine 42 can weld it into place, and the product can also be transferred using its gripping ability. Meanwhile, the second handling robot 41 and the third handling robot 44 can operate in parallel without interfering with each other, and can take care of both the upper and lower processes, which is conducive to improving the production cycle; and they are more flexible and can better accommodate various vehicle models.

[0044] Specifically, the stud welding machine 42 includes: a welding machine bracket 421, a welding torch mounting bracket 422, a welding torch 423, and a welding machine drive cylinder 424; the welding torch mounting bracket 422 is rotatably connected to the welding machine bracket 421, and the welding torch 423 is mounted on the welding torch mounting bracket 422; the cylinder body of the welding machine drive cylinder 424 is rotatably connected to the welding machine bracket 421, and the piston rod is hinged to the welding torch mounting bracket 422. The welding machine drive cylinder 424 extends and drives the welding torch mounting bracket 422 to swing, thereby controlling the welding torch 423 to switch between horizontal and vertical downward.

[0045] Specifically, the flipping platform 43 includes: a flipping base 431, two flipping supports 432, and multiple flipping clamps 433. The two flipping supports 432 are welded and fixed to the flipping base 431 opposite to each other and spaced apart. The same side of the two flipping supports 432 forms an inclined placement surface. The multiple flipping clamps 433 are respectively disposed on the two flipping supports 432 and extend out of the inclined placement surface. The second handling robot 41 passes through the two flipping supports 432 and transports the semi-finished product 3 from the back side of the inclined placement surface. The semi-finished product 3 is clamped and fixed to one side of the inclined placement surface by the multiple flipping clamps 433 and is fixed at an angle. The third handling robot 44 grabs the semi-finished product 3 from the front side of the inclined placement surface, thereby realizing the flipping of the semi-finished product 3 to facilitate the welding of studs on both sides.

[0046] Preferably, the arc welding assembly unit 5 includes: a third sliding table fixture 51, an arc welding robot 52, and a fourth handling robot 53. The third sliding table fixture 51 is used to clamp the product three grasped by the third handling robot 44 in the welding area of ​​the arc welding robot 52. The arc welding robot 52 is used to perform arc welding on the product three on the third sliding table fixture 51 to obtain the finished product. The third sliding table fixture 51 carries the finished product to the unloading area of ​​the arc welding assembly unit 5. The fourth handling robot 53 is used to grasp the finished product on the third sliding table fixture 51 and transfer it to the inspection and unloading unit 6. Specifically, the structure of the third sliding table fixture 51 is the same type as that of the first sliding table fixture 14, and will not be described in detail here. The arc welding robot 52 is equipped with a multi-functional end effector, which can quickly switch between arc welding guns, glue guns, etc., and is responsible for completing special processes such as arc welding and glue sealing.

[0047] Preferably, the inspection and unloading unit 6 includes: an inspection platform 61, an inspection device 62, an inspection and handling robot 63, and a fourth sliding table fixture 64. The inspection platform 61 is used to carry and position the finished products grasped by the fourth handling robot 53. The inspection device 62 is used to perform quality inspection on the finished products. The inspection and handling robot 63 is used to grasp the qualified products that have passed the inspection and loading onto the fourth sliding table fixture 64. The fourth sliding table fixture 64 is used to carry the qualified products to the unloading area of ​​the inspection and unloading unit 6.

[0048] Specifically, the inspection platform 61 includes an inspection base and an inspection fixture component mounted on the inspection base. The inspection fixture component includes a pin positioning and a support column. The inspection equipment 62 uses a laser vision recognition system to scan the weld after the arc welding operation to detect defects such as incomplete welding and weld penetration, and to scan standard parts such as studs to detect defects such as incorrect welding and incomplete welding.

[0049] Specifically, the fourth slide table clamp 64 includes a fourth slide table base mechanism 641 and a fourth slide table clamp mechanism 642. The fourth slide table base mechanism 641 includes a fourth slide table base 6411, fourth slide table support columns 6412, a fourth slide table guide rail 6413, and a fourth slide table drive mechanism. Multiple fourth slide table support columns 6412 are fixed to the upper surface of the fourth slide table base 6411. The fourth slide table drive mechanism drives the fourth slide table base 6411 to slide along the fourth slide table guide rail 6413. The fourth slide table drive mechanism includes a drive motor and a gear and rack mechanism to move the fourth slide table base 6411. The fourth slide clamping mechanism 642 includes a fourth slide clamping plate 6421 and four fourth slide transfer wheels 6422 installed below the fourth slide clamping plate 6421. The fourth slide clamping plate 6421 is supported by multiple fourth slide support columns 6412, and the fourth slide transfer wheels 6422 are in contact with the ground. This allows the fourth slide clamping mechanism 642 to slide with the fourth slide base 6411, and when unloading, the fourth slide clamping mechanism 642 can be directly pulled to disengage from the fourth slide base mechanism 641.

[0050] Specifically, automatic grinding stations 7 are also provided in the main body assembly unit 1, the crossbeam assembly unit 2, and the repair welding assembly unit 3. After completing the preset number of welding points, each spot welding robot automatically goes to the automatic grinding station 7 to grind the electrode caps, ensuring that the electrode shape is always in optimal condition. The automatic grinding station 7 includes: a grinding frame 71, a floating component 72, a grinding motor 73, and a grinding head 74. The floating component 72 is installed on the grinding frame 71. The floating component 72 includes two floating bases fixed on the grinding frame 71, guide columns passing through the floating bases, springs sleeved on the guide columns, and a grinding mounting seat fixed on the upper end of the guide columns. When the grinding mounting seat is subjected to force, it can act on the springs, and the springs resist the movement of the grinding mounting seat to achieve floating support. The grinding motor 73 and the grinding head 74 are installed on the grinding mounting seat, and the grinding motor 73 drives the grinding head 74 to rotate.

[0051] This application utilizes various fixtures, including the front floor assembly loading cart 11, the central aisle assembly loading cart 12, the first slide table fixture 14, the second slide table fixture 21, the welding repair table 31, the flipping table 43, the third slide table fixture 51, the inspection table 61, and the fourth slide table fixture 64, and achieves a modular design. Each robot has high flexibility and can achieve intelligent switching. By changing the positioning module and calling the corresponding robot program, the vehicle model changeover can be completed within 10 minutes, making it more suitable for mixed-line production.

[0052] The working principle of the device in this application is as follows: First, the adhesive application robot 13 picks up the workpiece from the front floor sub-assembly loading car 11 and the central aisle assembly loading car 12, applies adhesive in the air, and after visual inspection to ensure there are no quality problems with the adhesive application, places the workpiece on the first slide table fixture 14, which then clamps the workpiece.

[0053] Subsequently, the first spot welding robot 15, according to a preset program and under the scheduling of the central control system, performs spot welding operations in an orderly manner. During the welding of each weld point, the real-time weld quality monitoring unit collects welding current, electrode pressure, and time parameters in real time and plots a dynamic resistance curve. This curve is compared in real time with the qualified standard curve in the database. If the match is higher than a set threshold, the weld point is deemed qualified, and "OK" is recorded in the data management and traceability unit; if an abnormality occurs, an alarm is immediately triggered, defect information is recorded, and personnel are prompted to intervene. Under the command of the central control system, the first spot welding robot 15 periodically goes to the automatic grinding station 7 to automatically grind the electrode caps, ensuring the continuous stability of welding quality.

[0054] Next, the seven-axis robot 16 transfers the workpiece to the crossbeam assembly unit 2 to assemble the seat crossbeam and perform spot welding. Then it is transferred to the repair welding assembly unit 3 for repair welding.

[0055] Then, after the main spot welding process is completed, the second handling robot 41 and the third handling robot 44 grab the workpiece and perform automatic welding, completing all the stud welding in sequence; after welding, it is placed on the third slide fixture 51, clamped, and then the two arc welding robots 52 perform welding, while the coding machine performs automatic coding.

[0056] Finally, after all the work is completed, the fourth handling robot 53 picks up the workpiece and performs visual inspection on the welds, stud welds, etc. After the inspection is completed, it scans the QR code, and feeds back and stores the visual inspection results.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fully automated pre-floor production line, characterized in that, include: The body assembly unit (1) is used to apply adhesive to the front floor sub-assembly and the central channel assembly and spot weld them together to form the front floor body, and to transfer the front floor body to the crossbeam assembly unit (2). The crossbeam assembly unit (2) is used to spot weld the seat crossbeam and the front floor body into product one, and transfer product one to the welding assembly unit (3). The welding assembly unit (3) is used to weld product one into product two. The stud assembly unit (4) is used to grab the welding stud of product two to obtain product three, and transfer product three to the arc welding assembly unit (5). The arc welding assembly unit (5) is used to perform arc welding on product three to obtain the finished product, and transfer the finished product to the inspection and off-line unit (6). The inspection and unloading unit (6) is used to inspect the welding of finished products and unload qualified products that pass the inspection.

2. The fully automated front floor production line according to claim 1, characterized in that, The main assembly unit (1) includes: a front floor sub-assembly loading trolley (11), a central aisle assembly loading trolley (12), a handling and gluing robot (13), a first sliding table fixture (14), a first spot welding robot (15), and a seven-axis robot (16); the front floor sub-assembly loading trolley (11) is used to handle and position the front floor sub-assembly, the central aisle assembly loading trolley (12) is used to handle and position the central aisle assembly, and the handling and gluing robot (13) is used to grip the front floor sub-assembly and the central aisle assembly respectively. The front floor sub-assembly and the central channel assembly are clamped on the first slide table fixture (14) and glue is applied. The first slide table fixture (14) is used to clamp the front floor sub-assembly and the central channel assembly and move them to the welding area of ​​the first spot welding robot (15). The first spot welding robot (15) is used to spot weld the front floor sub-assembly and the central channel assembly on the first slide table fixture (14) to form the front floor body. The seven-axis robot (16) is used to grab the front floor body on the first slide table fixture (14) and transfer it to the crossbeam assembly unit (2).

3. The fully automated front floor production line according to claim 2, characterized in that, The front floor sub-assembly loading trolley (11) includes: a front floor platform (111), a front floor support component, a front floor positioning component, and a front floor detection component; the front floor support component includes multiple support members (112) disposed on the front floor platform (111), and the multiple support members (112) support the front floor sub-assembly; the front floor positioning component includes multiple front floor positioning pins (113) and a front floor positioning pin lifting driver (114) with the same number of front floor positioning pins (113), the front floor positioning pin lifting driver (114) is disposed on the front floor platform (111) and drives the front floor positioning pins (113) to insert into the first positioning hole of the front floor sub-assembly for positioning; the front floor detection component includes multiple support members (112) disposed on the front floor platform (111) and a front floor positioning pin lifting driver (114) disposed on the front floor platform (111) and drives the front floor positioning pins (113) to insert into the first positioning hole of the front floor sub-assembly for positioning; the front floor detection component includes multiple support members (112) disposed on the front floor platform (111) and a front floor positioning pin lifting driver (114) to lift the front floor positioning pins (113) to insert into the first positioning hole of the front floor sub-assembly for positioning. 1) A first detection mounting bracket (115) and a second detection mounting bracket (116) are provided on the first detection mounting bracket (115). The first detection mounting bracket (115) is provided with a first laser sensor (1151), a second laser sensor (1152) and a third laser sensor (1153). The beam of the first laser sensor (1151) is aligned with the second positioning hole on the front floor sub-assembly. The beam of the second laser sensor (1152) is aligned with the third positioning hole on the front floor sub-assembly. The beam of the third laser sensor (1153) is aligned with the fourth positioning hole on the front floor sub-assembly. The second detection mounting bracket (116) is provided with a fourth laser sensor (1161). The beam of the fourth laser sensor (1161) is aligned with the fifth positioning hole on the front floor sub-assembly.

4. The fully automated front floor production line according to claim 2, characterized in that, The central channel assembly loading car (12) includes a central base mechanism (121) and a central clamping mechanism (122). The central base mechanism (121) includes a central base (1211), a central guide wheel assembly located in the middle of the central base (1211), and a central guide block (1213) located at the front end of the central guide wheel assembly. The guide wheel assembly includes multiple pairs of central guide wheels (1212) arranged along the docking direction. The central guide block (1213) includes two opposing central guide ramps (12131). A guide channel is formed between the two central guide ramps (12131). The opening of the guide channel away from the central guide wheel assembly is wider than the opening towards the central guide wheel assembly. The central clamping mechanism (122) includes a central clamping connecting plate (1221) and a central guide plate (1222) fixed below the central clamping connecting plate (1221). The central guide plate (1222) is arranged along the docking direction. When the central clamping mechanism (122) docks with the central base mechanism (121) along the docking direction, the central guide plate (1222) is first inserted into the guide channel and then guided to be inserted sequentially between each pair of central guide wheels (1212) of the central guide wheel group. Each pair of central guide wheels (1212) abuts against and rolls from both sides of the central guide plate (1222).

5. A fully automated front floor production line according to claim 2, characterized in that, The first slide table clamp (14) includes: a first slide table base mechanism (141) and a first slide table clamp mechanism (142). The first slide table base mechanism (141) includes: a first slide table base (1411), a first slide table guide wheel assembly disposed in the middle of the first slide table base (1411), a first slide table track (1413), and a first slide table drive mechanism for driving the first slide table base (1411) to slide along the first slide table track (1413). The first slide table guide wheel assembly includes multiple pairs of first slide table guide wheels (1412) disposed along the sliding direction of the first slide table track (1413). The first slide clamp mechanism (142) includes: a first slide clamp connecting plate (1421) and a first slide guide plate (1422) fixed below the first slide clamp connecting plate (1421). The first slide guide plate (1422) is arranged along the sliding direction of the first slide track (1413). When the first slide clamp mechanism (142) is connected with the first slide base mechanism (141) along the sliding direction of the first slide track (1413), the first slide guide plate (1422) is inserted between each pair of first slide guide wheels (1412) of the first slide guide wheel group. Each pair of first slide guide wheels (1412) abuts against and rolls from both sides of the first slide guide plate (1422).

6. The fully automated front floor production line according to claim 2, characterized in that, The beam assembly unit (2) includes: a second slide table fixture (21), a second spot welding robot (22) and a first transport robot (23). The second slide table fixture (21) is used to clamp the front floor body gripped by the seven-axis robot (16) in the welding area of ​​the second spot welding robot (22). After the second slide table fixture (21) carries the front floor body to the loading area of ​​the beam assembly unit (2), it clamps the seat beam. The second slide table fixture (21) carries the front floor body and the seat beam back to the welding area of ​​the second spot welding robot (22) and the second spot welding robot (22) performs spot welding on the front floor body and the seat beam to form product one. The first transport robot (23) is used to grab product one on the second slide table fixture (21) and transfer it to the welding assembly unit (3).

7. A fully automated front floor production line according to claim 6, characterized in that, The welding assembly unit (3) includes a welding platform (31) and a third spot welding robot (32). The welding platform (31) is used to clamp the product one grasped by the first handling robot (23). The third spot welding robot (32) is used to weld the product one on the welding platform (31) into product two.

8. A fully automated front floor production line according to claim 7, characterized in that, The stud assembly unit (4) includes: a second transport robot (41), a stud welding machine (42), a flipping platform (43), and a third transport robot (44). The second transport robot (41) is used to grab the product two on the welding platform (31) and cooperate with the stud welding machine (42) to weld the stud to obtain a semi-finished product three. The flipping platform (43) is used to clamp the semi-finished product three. The third transport robot (44) grabs the semi-finished product three on the flipping platform (43), flips it, and cooperates with the stud welding machine (42) to weld the stud to obtain a finished product three. The third transport robot (44) grabs the finished product three and transfers it to the arc welding assembly unit (5).

9. A fully automated front floor production line according to claim 8, characterized in that, The arc welding assembly unit (5) includes: a third slide table fixture (51), an arc welding robot (52), and a fourth handling robot (53). The third slide table fixture (51) is used to clamp the product three grasped by the third handling robot (44) in the welding area of ​​the arc welding robot (52). The arc welding robot (52) is used to perform arc welding on the product three on the third slide table fixture (51) to obtain the finished product. The third slide table fixture (51) carries the finished product to the unloading area of ​​the arc welding assembly unit (5). The fourth handling robot (53) is used to grasp the finished product on the third slide table fixture (51) and transfer it to the inspection and unloading unit (6).

10. A fully automated front floor production line according to claim 9, characterized in that, The inspection and off-line unit (6) includes: an inspection platform (61), an inspection device (62), an inspection and handling robot (63), and a fourth sliding table fixture (64). The inspection platform (61) is used to carry and position the finished products picked up by the fourth handling robot (53). The inspection device (62) is used to perform quality inspection on the finished products. The inspection and handling robot (63) is used to pick up the qualified products that have passed the inspection and place them onto the fourth sliding table fixture (64). The fourth sliding table fixture (64) is used to carry the qualified products to the off-line area of ​​the inspection and off-line unit (6).

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