Automobile door trim multi-point conformal bending positioning and assembling machine

Abstract

The application discloses a kind of automobile door trim multi-point conformal bending positioning assembly machines, belong to bending assembly machine technical field, comprising: bending assembly mechanism, bending assembly mechanism includes hydraulic cylinder on workbench, hydraulic cylinder one end is connected with punch by push rod, and the top of workbench is uniformly fixed and installed with the limiting block corresponding with punch, and the one end of push rod is connected with the baffle and rack plate extending to the upper and lower ends inside storage box respectively by support;Rack plate outer wall has meshing transmission first gear, and the center shaft of first gear is connected with annular distribution guide plate, and guide plate is formed with guide cavity on the inner wall of storage box between guide plate.The application solves the problem that bending action, assembly part supply action and flexible pushing action need to be set power source respectively in the bending assembly process of existing automobile door trim, leading to the problem of complex device structure, difficult beat matching and insufficient assembly position stability.

Description

Technical Field

[0001] This invention belongs to the field of bending and assembly machine technology, specifically relating to a multi-point conformal bending and positioning assembly machine for automotive door trim strips. Background Technology

[0002] Automotive door trim strips are long, strip-shaped components installed on the doors of automobiles, serving both decorative and protective functions. They are divided into two main categories: door trim strips and door anti-scratch strips. Commonly used materials include ABS plastic, rubber, chrome-plated metal, and composite extruded materials.

[0003] The bending and assembly machine first bends the car door trim into shape on the same equipment and at the same workstation, and then completes the pressing, fastening, riveting and splicing of the parts. The bending and assembly processes are completed in a continuous manner, and the workpieces do not need to be disassembled and transferred.

[0004] During the bending and assembly process of automotive door trim strips, an additional power structure needs to be designed to assemble the workpiece onto the bent trim strip. Furthermore, a corresponding pushing mechanism is required to transport the workpiece, resulting in a complex structure, poor integration, and inconvenient repairs in case of damage. Additionally, during the image recognition and screening process for the automotive door trim strips, a robotic arm is needed to flip the strip for comprehensive image inspection. However, the high-frequency flipping motion of the robotic arm leads to mechanical wear, reducing the machine's lifespan. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-point conformal bending and positioning assembly machine for automotive door trim strips, in order to solve the problems that in the existing automotive door trim strip bending and assembly process, the bending action, the assembly parts supply action, and the flexible pushing action need to be equipped with separate power sources, resulting in complex device structure, difficulty in cycle matching, and insufficient stability of assembly position.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A multi-point conformal bending and positioning assembly machine for automotive door trim strips includes: A bending assembly mechanism includes a hydraulic cylinder on a workbench. One end of the hydraulic cylinder is connected to a punch via a push rod. Limiting blocks corresponding to the punch are fixedly installed around the top of the workbench. One end of the push rod is connected to a baffle plate and a rack plate extending to the upper and lower ends of the storage box via a bracket. The outer wall of the rack plate is engaged with a first gear, and the central shaft of the first gear is connected to an annularly distributed guide plate. Two adjacent guide plates and the inner wall of the storage box together form a guide cavity for accommodating a single assembly part. The outer wall of the first gear is engaged with a second gear that rotates in the opposite direction. The central shaft of the second gear and the first rotating shaft are connected by a belt drive. An elastic rod is fixedly installed on the first rotating shaft, and the outer wall of the elastic rod movably abuts against the assembly part of the car door trim.

[0007] Furthermore, the storage box is provided with a through hole communicating with the guide cavity. The outlet of the through hole is located above the assembly position of the bent car door trim. The outlet of the through hole corresponds to the assembly groove or assembly hole on the car door trim. The elastic rod extends into the unloading path of the storage box through the strip groove and applies a flexible thrust toward the through hole and assembly area to a single assembly part located at the outlet of the guide cavity. The effective tooth segment length of the rack plate matches the angular distance between adjacent guide plates, so that when the push rod completes one bending stroke, the first gear drives the guide plate to rotate through the angular distance of one guide cavity.

[0008] Furthermore, the outer wall of the storage box is provided with an arc-shaped groove connected to the guide plate, and the upper and lower ends of the inner wall of the storage box are provided with movable holes connected to the baffle plate and the rack plate. A shielding area is formed between the top surface of the baffle plate and the inner wall of the storage box. The first gear and the second gear are both connected to the inner wall of the storage box through bearings. The outer edge of the side plate on the worktable is provided with a rotating groove that is movably connected to the first rotating shaft. A retaining ring is fixedly installed on one end of the first rotating shaft near the belt. The storage box is provided with a through hole that penetrates its interior. The storage box and the worktable are fixedly connected by a bending rod. A stamping cavity is formed between the limiting blocks and placed on the top of the worktable. One end of the outer wall of the storage box is provided with a strip groove connected to an elastic rod. The elastic rod is distributed in a ring array on the first rotating shaft.

[0009] Furthermore, it also includes a flipping detection mechanism, which includes a first conveyor line and a second conveyor line placed at one end of the workbench. Both the first and second conveyor lines are mounted on the frame and extend along the length of the frame, and are used to carry and convey the car door trim strip. A drive motor is fixedly installed at one end of the frame on the first conveyor line. The output shaft of the drive motor is connected to a small gear inside the cover. A large gear meshes with the outer wall of the small gear.

[0010] Furthermore, the second rotating shaft at the center of the large gear is fixed on the first bevel gear, and the outer wall of the first bevel gear meshes with the second bevel gear fixed on the reciprocating screw. One end of the second rotating shaft is connected to a flipping rod placed between the first and second conveying lines. The connection between the cover and the frame is fixed by a positioning pin. The reciprocating screw has a first slider that is screwed on it. The first slider and the second slider on the second conveying line frame are connected by a swing rod.

[0011] Furthermore, the outer wall of the cover is provided with a first limiting groove connected to the first slider in the length direction, and the second conveyor frame is provided with a second limiting groove connected to the second slider in the height direction. The frame on the first conveyor line is equipped with a first camera by a positioning rod, and the extension end on one side of the second slider is connected to a second camera placed above the second conveyor line. The two ends of the swing rod are rotatably connected to the first slider and the second slider, respectively.

[0012] Furthermore, one end of the first slider is connected to a push plate positioned directly above the flipping rod, and a movable cavity connected to the flipping rod is formed between the first and second conveyor lines. The first and second cameras transmit signals to the display on the workbench via electrical connection.

[0013] Furthermore, the top of the workbench is provided with a positioning groove connected to the hydraulic cylinder, and the baffle has a closed position and a material-feeding position; in the closed position, the baffle blocks the assembly parts located above the guide cavity in the storage box; in the material-feeding position, the baffle releases the obstruction of the lowest assembly part, allowing a single assembly part to enter the corresponding guide cavity.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) In this invention, by setting a hydraulic cylinder, a push rod, and a punch on the worktable, and setting limit blocks corresponding to the punch around the top of the worktable, the car door trim strip can be subject to multi-directional limiting constraints after entering the stamping cavity, and then the punch completes the bending operation. This structure can limit the lateral movement and positional deviation of the car door trim strip during the bending process, so that the bending position corresponds to the predetermined assembly position, thereby improving the positioning accuracy and forming consistency of multi-point conformal bending.

[0015] (2) In this invention, the push rod synchronously drives the baffle plate and the rack plate to move, so that the hydraulic cylinder can control the unloading process of the assembled parts in the storage box while driving the punch to bend. The rack plate drives the first gear to rotate, and the first gear drives the circularly distributed guide plates to rotate in sequence, so that the assembled parts can enter the guide cavity formed between the adjacent guide plates and be transported to the assembly area according to the bending rhythm. This realizes the synchronous coordination between the bending action and the part loading action, reduces the manual unloading operation one by one, and improves the continuous assembly efficiency.

[0016] (3) In this invention, the first gear meshes and drives the second gear to rotate in the opposite direction. The second gear then drives the first shaft to rotate via a belt, so that multiple elastic rods on the first shaft can periodically abut against the assembly parts. During rotation, the elastic rods can flexibly push and assist the assembly parts, which can avoid damage to the parts caused by rigid impacts and reduce the probability of parts getting stuck, stacked, or having difficulty unloading in the storage box or guide area, thereby improving the positional stability of the assembly parts when they enter the assembly area.

[0017] (4) In this invention, by setting up a first conveyor line, a second conveyor line, a drive motor, a flipping rod, a first camera, and a second camera, the automotive door trim strip can be inspected on one side of its surface or in its initial state during the conveying process by the first camera, and then the flipping rod and the push plate can be used to flip it over so that the second camera can inspect the other side of its surface or in its assembled state. At the same time, the reciprocating screw, the first slider, the second slider, and the swing rod can drive the second camera to adjust its position, which helps to expand the detection range, improve the accuracy of screening the appearance, position, and assembly state of the automotive door trim strip, reduce omissions in manual inspection, and improve the stability of product quality. Attached Figure Description

[0018] 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 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.

[0019] Figure 1 This is a schematic diagram of the structure of a multi-point conformal bending and positioning assembly machine for automotive door trim strips according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a multi-point conformal bending and positioning assembly machine for automotive door trim strips according to the present invention. Figure 2 ; Figure 3 This is a front view of a multi-point conformal bending and positioning assembly machine for automotive door trim according to the present invention; Figure 4 This is the present invention. Figure 2 Enlarged view of point A; Figure 5 This is a schematic diagram of the interior of the storage box of the present invention; Figure 6 This is a schematic diagram of the meshing transmission between the first gear and the second gear of the present invention; Figure 7 This is the present invention. Figure 1 Enlarged view of point B; Figure 8 This is a schematic diagram of the meshing transmission of the first bevel gear and the second bevel gear of the present invention.

[0020] Reference numerals: 1. Bending assembly mechanism; 2. Workbench; 3. Hydraulic cylinder; 4. Push rod; 5. Punch; 6. Limit block; 7. Storage box; 8. Baffle plate; 9. Rack plate; 10. First gear; 11. Guide plate; 12. Guide cavity; 13. Second gear; 14. First rotating shaft; 15. Belt; 16. Elastic rod; 17. Retaining ring; 18. Through hole; 19. Strip groove; 20. Tilting detection mechanism; 21. First conveyor 21. Conveyor line; 22. Second conveyor line; 23. Drive motor; 24. Cover; 25. Small gear; 26. Large gear; 27. Second rotating shaft; 28. First bevel gear; 29. ​​Reciprocating screw; 30. Second bevel gear; 31. Tilting rod; 32. First slider; 33. Second slider; 34. Swing rod; 35. First limiting groove; 36. Second limiting groove; 37. First camera; 38. Second camera; 39. Push plate. Detailed Implementation

[0021] 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.

[0022] Reference manual attached Figure 1 To be continued Figure 8 As shown, this invention discloses a multi-point conformal bending and positioning assembly machine for automotive door trim strips, including a bending and assembly mechanism 1 and a flipping and detection mechanism 20. The bending and assembly mechanism 1 is used for positioning, bending, and synchronously introducing assembly parts for automotive door trim strips, while the flipping and detection mechanism 20 is used for conveying, flipping, and image detection of the bent or assembled automotive door trim strips, thereby enabling the automotive door trim strips to continuously complete bending, positioning, assembly, and inspection and screening processes.

[0023] The bending assembly mechanism 1 includes a hydraulic cylinder 3 mounted on a workbench 2. The top of the workbench 2 has a positioning groove that mates with the hydraulic cylinder 3. After the hydraulic cylinder 3 is installed in the positioning groove, it maintains a stable working position, preventing wobbling during reciprocating extension and retraction. One end of the hydraulic cylinder 3 is connected to a push rod 4, and the end of the push rod 4 away from the hydraulic cylinder 3 is connected to a punch 5. Limiting blocks 6 are fixedly installed around the top of the workbench 2. Multiple limiting blocks 6 form a stamping cavity at the top of the workbench 2. After the automotive door trim strip is placed in the stamping cavity, its circumferential position is restricted by the limiting blocks 6.

[0024] The punch 5 and the limiting block 6 are positioned correspondingly. When the hydraulic cylinder 3 drives the push rod 4 to extend, the push rod 4 drives the punch 5 to move towards the automotive door trim strip inside the stamping chamber. The punch 5 stamps and bends the part of the automotive door trim strip to be bent. Because the limiting block 6 can position and constrain the automotive door trim strip from multiple directions, the automotive door trim strip is less likely to move laterally or shift as a whole during the bending process. This ensures that the bending position is consistent with the preset assembly position, which is suitable for the positioning processing requirements of multi-point conformal bending of automotive door trim strips.

[0025] A storage box 7 is provided on one side of the workbench 2. The storage box 7 is fixedly connected to the workbench 2 by a bending rod, so that the storage box 7 can be kept in a position close to the stamping cavity and the assembly area. A through hole 18 is provided in the storage box 7, and the bottom of the through hole 18 forms an assembly area with the bent car door trim. Assembly parts can fall from the storage box 7 through the through hole 18 or be guided into the assembly area and be assembled with the bent car door trim.

[0026] One end of the push rod 4 is connected to the baffle plate 8 and the rack plate 9 via a bracket. The baffle plate 8 and the rack plate 9 extend to the upper and lower ends of the storage box 7, respectively. Movable holes are provided at both the upper and lower ends of the inner wall of the storage box 7, allowing the baffle plate 8 and the rack plate 9 to reciprocate within their respective movable holes. A blocking area is formed between the top surface of the baffle plate 8 and the inner wall of the storage box 7. When the baffle plate 8 is in the blocking position, it can temporarily block the assembled parts inside the storage box 7, preventing multiple assembled parts from falling simultaneously and affecting subsequent positioning and assembly.

[0027] The outer wall of the rack plate 9 meshes with the first gear 10 for transmission. The first gear 10 is mounted on the inner wall of the storage box 7 via bearings, enabling it to rotate stably relative to the storage box 7. Multiple annularly distributed guide plates 11 are connected to the central shaft of the first gear 10, forming guide cavities 12 between adjacent guide plates 11. The outer wall of the storage box 7 has arc-shaped grooves that mate with the guide plates 11. When the guide plates 11 rotate, they can move along the arc-shaped groove area, separating, supporting, and gradually guiding the assembled parts entering the guide cavity 12 to the location of the through hole 18.

[0028] While the hydraulic cylinder 3 pushes the punch 5 to perform a bending action, the push rod 4 synchronously drives the baffle plate 8 and the rack plate 9 to move through the bracket. When the rack plate 9 moves, it drives the first gear 10 to rotate, which in turn drives the guide plate 11 on the central shaft to rotate. This allows the assembled parts in the storage box 7 to enter the guide cavity 12 according to the rotation rhythm of the guide plate 11, and then be guided by the guide cavity 12 to the through hole 18. Thus, the bending action of the punch 5 and the guiding action of the assembled parts in the storage box 7 form a mechanical linkage, eliminating the need for an additional independent feeding drive source, thereby improving the consistency of the assembly action and the coordination of equipment operation.

[0029] The outer wall of the first gear 10 is also meshed with a second gear 13, which is also mounted on the inner wall of the storage box 7 via bearings. When the first gear 10 rotates, the second gear 13 rotates in the opposite direction due to the meshing action. The central shaft on the second gear 13 is connected to the first rotating shaft 14 via a belt 15. The first rotating shaft 14 is located at the edge of the outer wall of the side plate on the workbench 2. The edge of the outer wall of the side plate has a rotating groove that is movably connected to the first rotating shaft 14, allowing the first rotating shaft 14 to rotate stably. A retaining ring 17 is fixedly installed on the side of the first rotating shaft 14 near the belt 15. The retaining ring 17 can limit the lateral deviation of the belt 15 and improve the stability of the belt 15 during transmission.

[0030] Multiple elastic rods 16 are fixedly mounted on the first rotating shaft 14, and the multiple elastic rods 16 are arranged in a ring array. One end of the outer wall of the storage box 7 is provided with a strip groove 19 that cooperates with the elastic rods 16. The elastic rods 16 can rotate with the first rotating shaft 14 and move within the area of ​​the strip groove 19. The outer wall of the elastic rods 16 can move and abut against the assembly parts of the car door trim. When the second gear 13 drives the first rotating shaft 14 to rotate through the belt 15, the elastic rods 16 periodically contact the assembly parts, gently actuating and assisting in pushing the assembly parts, so that the assembly parts can smoothly enter the guide cavity 12 or the assembly area.

[0031] Because the elastic rod 16 has a certain degree of elasticity, it can provide a buffering effect when it comes into contact with the assembled parts, preventing rigid impact and reducing surface damage. Simultaneously, the periodic movement of the elastic rod 16 reduces the probability of the assembled parts getting stuck, stacked, or experiencing uneven feeding within the storage box 7, allowing them to enter the assembly area below the through hole 18 in a more stable posture, thus improving the reliability of the assembly positioning after the automotive door trim strip is bent.

[0032] In practice, the operator or an external feeding device places the car door trim to be processed into the stamping chamber at the top of the workbench 2, and the limiting block 6 positions the car door trim. After the hydraulic cylinder 3 is activated, it drives the push rod 4 to extend, and the push rod 4 drives the punch 5 to bend the car door trim. At the same time as the push rod 4 extends, the baffle plate 8 and the rack plate 9 move synchronously. The baffle plate 8 changes the obstruction state of the assembly parts in the storage box 7, and the rack plate 9 drives the first gear 10 to rotate. The first gear 10 drives the guide plate 11 to divide and guide the material, and the second gear 13 drives the first rotating shaft 14 and the elastic rod 16 to rotate through the belt 15 to help the assembly parts enter the assembly area stably. After the car door trim is bent, the assembly parts can fall into or be guided to the corresponding position of the bent car door trim, thereby completing the positioning assembly.

[0033] A flipping and inspection mechanism 20 is located at one end of the workbench 2 and includes a first conveyor line 21 and a second conveyor line 22. Both the first and second conveyor lines 21 and 22 are mounted on corresponding frames and extend along the length of the frames, used to carry and transport the automotive door trim strips. The first conveyor line 21 receives the bent and assembled automotive door trim strips and transports them towards the second conveyor line 22. The second conveyor line 22 continues to transport the flipped and inspected automotive door trim strips.

[0034] A drive motor 23 is fixedly mounted on one end of the frame on the first conveyor line 21. The output shaft of the drive motor 23 is connected to a small gear 25 inside the cover 24. The cover 24 and the frame are locked together by a positioning pin, which can protect and position the small gear 25, the large gear 26, and related transmission components. The outer wall of the small gear 25 meshes with the large gear 26 for transmission. The small gear 25 drives the large gear 26 to rotate, which can achieve stable power transmission and make subsequent flipping movements smoother.

[0035] A second rotating shaft 27 is located at the center of the large gear 26. One end of the second rotating shaft 27 is connected to a tilting rod 31 located between the first conveyor line 21 and the second conveyor line 22. A movable cavity is formed between the first conveyor line 21 and the second conveyor line 22 to cooperate with the tilting rod 31, which can rotate within the movable cavity. When the car door trim is conveyed by the first conveyor line 21 to a position close to the second conveyor line 22, the second rotating shaft 27 drives the tilting rod 31 to rotate. The tilting rod 31 supports, lifts, or tilts the car door trim, allowing it to enter the second conveyor line 22 in a changed posture.

[0036] A first bevel gear 28 is fixed on the second rotating shaft 27. A second bevel gear 30 meshes with the outer wall of the first bevel gear 28. The second bevel gear 30 is fixed on the reciprocating screw 29. When the second rotating shaft 27 rotates, the first bevel gear 28 drives the second bevel gear 30 to rotate, and the second bevel gear 30 further drives the reciprocating screw 29 to rotate. A first slider 32 is screw-driven on the reciprocating screw 29. A first limiting groove 35 is opened on the outer wall of the cover 24 along the length direction. The first slider 32 cooperates with the first limiting groove 35, so that the first slider 32 reciprocates along the direction of the first limiting groove 35 under the drive of the reciprocating screw 29.

[0037] The second conveyor line 22 has a second limiting groove 36 in the height direction of its frame, and a second slider 33 is connected within the second limiting groove 36. The first slider 32 and the second slider 33 are connected by a swing rod 34, with both ends of the swing rod 34 rotatably connected to the first slider 32 and the second slider 33, respectively. When the first slider 32 moves along the first limiting groove 35, it drives the second slider 33 to move up and down along the second limiting groove 36 via the swing rod 34. An extension end on one side of the second slider 33 is connected to a second camera 38, which is located above the second conveyor line 22. Therefore, when the second slider 33 moves up and down, it can drive the second camera 38 to adjust the detection height or detection position.

[0038] In addition, a first camera 37 is mounted on the frame of the first conveyor line 21 via positioning rods. The first camera 37 is located above the first conveyor line 21 and is used to capture images of the appearance, bending position, or assembly status of the automotive door trim before it is flipped. A second camera 38 is located above the second conveyor line 22 and is used to capture images of the other side of the automotive door trim after it has been flipped, at different angles, or in its assembled state. Both the first camera 37 and the second camera 38 are electrically connected to transmit the acquired signals to a display on the workbench 2, allowing operators to observe the inspection results or to use them in conjunction with an external control system for screening and judgment.

[0039] One end of the first slider 32 is also connected to a push plate 39, which is located directly above the flipping rod 31. When the flipping rod 31 flips the car door trim, the push plate 39 can assist in limiting or guiding the car door trim, preventing it from jumping, deviating, or deviating from the predetermined conveying path during the flipping process. The flipping rod 31, the push plate 39, the first conveying line 21, and the second conveying line 22 cooperate with each other to enable the car door trim to smoothly transition from the first conveying line 21 to the second conveying line 22, and complete posture adjustment during the transition.

[0040] In actual use, the car door trim strip is first positioned on the workbench 2 by the limiting block 6, and then the hydraulic cylinder 3 drives the punch 5 to complete the conformal bending. During the bending process, the push rod 4 simultaneously drives the baffle plate 8, rack plate 9, first gear 10, guide plate 11, second gear 13, belt 15, first rotating shaft 14 and elastic rod 16 to move, so that the assembly parts can stably enter the assembly area according to the bending rhythm. After bending and assembly, the car door trim strip enters the first conveyor line 21 and is first inspected by the first camera 37. Then, the drive motor 23 drives the flipping rod 31 to move through the small gear 25, large gear 26 and second rotating shaft 27, so that the car door trim strip flips to the second conveyor line 22. At the same time, the second rotating shaft 27 drives the first slider 32 to move through the first bevel gear 28, the second bevel gear 30 and the reciprocating screw 29. The first slider 32 drives the second slider 33 to rise and fall through the swing rod 34, so that the second camera 38 can perform a second inspection on the flipped car door trim strip.

[0041] Through the aforementioned structural combination, this embodiment integrates the positioning and bending of automotive door trim strips, the synchronous supply of assembly parts, flexible assisted unloading, conveying and flipping, and dual-camera inspection into a single device. This device not only improves the accuracy of the bending position of automotive door trim strips but also reduces manual material feeding and inspection processes, lowers the risk of assembly parts jamming or misalignment, and improves continuous production efficiency and product inspection consistency.

[0042] In use, the automotive door trim strip to be bent and assembled is first placed in the stamping cavity formed by multiple limiting blocks 6 at the top of the workbench 2. The limiting blocks 6 limit the automotive door trim strip from its periphery, ensuring that the part of the automotive door trim strip to be bent corresponds to the punch 5. After the hydraulic cylinder 3 is activated, it drives the push rod 4 forward, which in turn drives the punch 5 to move towards the automotive door trim strip. The punch 5 performs conformal stamping and bending of the automotive door trim strip. Because the automotive door trim strip is restricted by the limiting blocks 6 during the bending process, the positional offset generated during bending can be reduced, ensuring that the bending position is consistent with the subsequent assembly position.

[0043] As the push rod 4 moves forward, it simultaneously drives the baffle plate 8 and rack plate 9 to move within the storage box 7 via the bracket. The baffle plate 8 controls the blocking state of the assembled parts within the storage box 7, preventing them from falling prematurely before reaching the corresponding assembly cycle. When the rack plate 9 moves, it meshes with the first gear 10, causing the first gear 10 to rotate and drive multiple guide plates 11 on its central shaft to rotate synchronously. A guide cavity 12 is formed between adjacent guide plates 11. After the assembled parts enter the guide cavity 12, they are separated and guided one by one as the guide plates 11 rotate, and then sent to the through hole 18 position of the storage box 7.

[0044] During the rotation of the first gear 10, the first gear 10 simultaneously drives the second gear 13, which meshes with it, to rotate in the opposite direction. The second gear 13 drives the first shaft 14 to rotate via the belt 15, and the multiple elastic rods 16 on the first shaft 14 move in a circumferential direction accordingly. During rotation, the elastic rods 16 can pass through or approach the strip groove 19 on the outer wall of the storage box 7, and make active contact with the assembly parts of the car door trim, providing gentle pushing and assisting in pushing the assembly parts. Because the elastic rods 16 have an elastic buffering effect, they are less likely to cause hard collisions to the parts when pushing them, and at the same time, they can reduce the stacking, jamming, or uneven feeding of the assembly parts in the storage box 7.

[0045] After the car door trim strip is bent, the assembly parts enter the assembly area formed between the bottom of the through hole 18 of the storage box 7 and the bent car door trim strip, and cooperate with the corresponding assembly positions on the car door trim strip, thereby completing the directional supply and pre-positioning of the bent assembly parts. When the hydraulic cylinder 3 returns, the push rod 4 drives the punch 5, the baffle plate 8 and the rack plate 9 to reset. The first gear 10, the guide plate 11, the second gear 13, the first rotating shaft 14 and the elastic rod 16 complete the corresponding reset or reverse action with the linkage structure, so as to carry out the next bending assembly cycle.

[0046] After bending and assembly, the car door trim enters the flipping and inspection mechanism 20. The car door trim is first carried by the first conveyor line 21 and then conveyed to the second conveyor line 22. During the conveying process, the first camera 37 captures images of the upper surface of the car door trim, its bending state, or its initial assembly state, and transmits the captured signals to the display on the workbench 2 for the operator to observe and judge.

[0047] The workbench 2 is also equipped with a controller, which is electrically connected to the first camera 37, the second camera 38, the drive component of the first conveyor line 21, the drive component of the second conveyor line 22, the drive motor 23, and the rejection execution mechanism. The controller receives the posture images before and after bending collected by the first camera 37 and the flipped image collected by the second camera 38. Based on the preset door trim outline reference, the target area of ​​the assembly part, and the position deviation threshold, the controller determines the bending position of the car door trim, the presence or absence of the assembly part, the assembly offset, and the appearance defects. When the judgment result is qualified, the controller controls the second conveyor line 22 to continue conveying. When the judgment result is unqualified, the controller controls the rejection execution mechanism to guide the corresponding car door trim into the unqualified product channel and displays and stores the detection result.

[0048] When the car door trim moves to the movable cavity position between the first conveyor line 21 and the second conveyor line 22, the drive motor 23 starts and drives the pinion 25 to rotate. The pinion 25 drives the large gear 26 to rotate, and the large gear 26 drives the flipping rod 31 to rotate through the second rotating shaft 27. The flipping rod 31 supports and flips the car door trim in the movable cavity, so that the car door trim changes its posture and enters the second conveyor line 22. The push plate 39 set at one end of the first slider 32 is located directly above the flipping rod 31. When the flipping rod 31 moves, it can play an auxiliary limiting and guiding role for the car door trim, preventing the car door trim from jumping, deviating or falling off the conveying path during the flipping process.

[0049] When the second rotating shaft 27 rotates, it also drives the second bevel gear 30 to rotate via the first bevel gear 28. The second bevel gear 30 drives the reciprocating screw 29 to rotate. The reciprocating screw 29 drives the first slider 32 to reciprocate along the first limiting groove 35 on the cover 24. The first slider 32 then drives the second slider 33 to move up and down along the second limiting groove 36 on the frame of the second conveyor line 22 via the swing rod 34. The second camera 38 is installed on the extension end on one side of the second slider 33, so when the second slider 33 moves, it can drive the second camera 38 to adjust the detection height or detection position.

[0050] After the car door trim enters the second conveyor line 22, the second camera 38 captures images of the other side surface of the flipped car door trim, different angle positions, or the assembled state, and transmits the signals to the display. With the cooperation of the first camera 37 and the second camera 38, the different surfaces and assembly states of the car door trim before and after flipping can be detected and observed, making it easier to screen out products that are not bent properly, have abnormal assembly positions, or whose appearance does not meet the requirements.

[0051] In summary, this invention achieves multi-point conformal bending and positioning of automotive door trim strips through hydraulic cylinder 3, push rod 4, punch 5, and limiting block 6; it achieves rhythmic material guiding of assembly parts through baffle plate 8, rack plate 9, first gear 10, guide plate 11, and guide cavity 12; it achieves flexible assisted material feeding of assembly parts through second gear 13, belt 15, first rotating shaft 14, and elastic rod 16; and it achieves conveying, flipping, and bidirectional detection of automotive door trim strips through first conveyor line 21, second conveyor line 22, flipping rod 31, first camera 37, and second camera 38. The continuous cooperation between these mechanisms enables the automotive door trim strips to sequentially complete positioning bending, parts assembly, flipping conveying, and camera screening, improving the continuous operation capability and assembly detection stability of the equipment.

[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0053] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to only certain specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-point conformal bending and positioning assembly machine for automotive door trim strips, characterized in that, include: The bending assembly mechanism (1) includes a hydraulic cylinder (3) on a workbench (2). One end of the hydraulic cylinder (3) is connected to a punch (5) via a push rod (4). Limiting blocks (6) corresponding to the punch (5) are fixedly installed around the top of the workbench (2). One end of the push rod (4) is connected to a baffle plate (8) and a rack plate (9) extending to the upper and lower ends of the storage box (7) via a bracket. The outer wall of the rack plate (9) is engaged with a first gear (10). The central shaft of the first gear (10) is connected to a ring of guide plates (11). Two adjacent guide plates (11) and the inner wall of the storage box (7) together form a guide cavity (12) for accommodating a single assembly part. The outer wall of the first gear (10) is engaged with a second gear (13) that rotates in the opposite direction. The central shaft of the second gear (13) and the first rotating shaft (14) are connected by a belt (15). An elastic rod (16) is fixedly installed on the first rotating shaft (14). The outer wall of the elastic rod (16) moves against the assembly part of the car door trim.

2. The multi-point conformal bending and positioning assembly machine for automotive door trim strips according to claim 1, characterized in that, The storage box (7) is provided with a through hole (18) communicating with the guide cavity (12). The outlet of the through hole (18) is located above the assembly position of the bent car door trim. The outlet of the through hole (18) corresponds to the assembly groove or assembly hole on the car door trim. The elastic rod (16) extends into the unloading path of the storage box (7) through the strip groove (19) and applies a flexible thrust toward the through hole (18) and the assembly area to a single assembly part located at the outlet of the guide cavity (12). The effective tooth segment length of the rack plate (9) matches the angular distance between adjacent guide plates (11) so that when the push rod (4) completes one bending stroke, the first gear (10) drives the guide plate (11) to rotate through the angular distance of one guide cavity (12).

3. The multi-point conformal bending and positioning assembly machine for automotive door trim strips according to claim 2, characterized in that, The outer wall of the storage box (7) is provided with an arc-shaped groove that connects to the guide plate (11), and the upper and lower ends of the inner wall of the storage box (7) are provided with movable holes that connect to the baffle plate (8) and the rack plate (9). A baffle area is formed between the top surface of the baffle plate (8) and the inner wall of the storage box (7). The first gear (10) and the second gear (13) are connected to the inner wall of the storage box (7) at both ends through bearings. The outer edge of the side plate on the workbench (2) is provided with a rotating groove that is movably connected to the first rotating shaft (14). A retaining ring (17) is fixedly installed on one end of the first rotating shaft (14) near the belt (15). A through hole (18) is opened on the storage box (7) and it is fixedly connected to the workbench (2) by a bending rod. A stamping cavity is formed between the limiting blocks (6) and placed on the top of the workbench (2). A strip groove (19) connected to the elastic rod (16) is opened on one end of the outer wall of the storage box (7). The elastic rod (16) is distributed in a ring array on the first rotating shaft (14).

4. The multi-point conformal bending and positioning assembly machine for automotive door trim strips according to claim 1, characterized in that, It also includes a flipping detection mechanism (20), which includes a first conveyor line (21) and a second conveyor line (22) placed at one end of the workbench (2). The first conveyor line (21) and the second conveyor line (22) are both mounted on the frame and extend along the length of the frame, and are used to carry and convey the car door trim. A drive motor (23) is fixedly mounted on one end of the frame on the first conveyor line (21). The output shaft of the drive motor (23) is connected to a small gear (25) inside the cover (24). A large gear (26) meshes with the outer wall of the small gear (25).

5. The multi-point conformal bending and positioning assembly machine for automotive door trim strips according to claim 4, characterized in that, The second rotating shaft (27) at the center of the large gear (26) is fixed on the first bevel gear (28). The outer wall of the first bevel gear (28) meshes with the second bevel gear (30) fixed on the reciprocating screw (29). One end of the second rotating shaft (27) is connected to a flipping rod (31) placed between the first conveying line (21) and the second conveying line (22). The connection between the cover (24) and the frame is fixed by locking with a positioning pin. The first slider (32) is screwed on the reciprocating screw (29). The first slider (32) and the second slider (33) on the frame of the second conveying line (22) are connected by a swing rod (34).

6. The multi-point conformal bending and positioning assembly machine for automotive door trim strips according to claim 5, characterized in that, The outer wall of the cover (24) is provided with a first limiting groove (35) connected to the first slider (32) along the length direction. The frame of the second conveyor line (22) is provided with a second limiting groove (36) connected to the second slider (33) along the height direction. The frame on the first conveyor line (21) is equipped with a first camera (37) via a positioning rod. The extension end on one side of the second slider (33) is connected to a second camera (38) placed above the second conveyor line (22). The two ends of the swing rod (34) are rotatably connected to the first slider (32) and the second slider (33) respectively.

7. The multi-point conformal bending and positioning assembly machine for automotive door trim strips according to claim 6, characterized in that, One end of the first slider (32) is connected to a push plate (39) placed directly above the flip rod (31). An active cavity connected to the flip rod (31) is formed between the first conveyor line (21) and the second conveyor line (22). The first camera (37) and the second camera (38) transmit signals to the display on the workbench (2) through electrical connection.

8. The multi-point conformal bending and positioning assembly machine for automotive door trim strips according to claim 1, characterized in that, The top of the workbench (2) is provided with a positioning groove connected to the hydraulic cylinder (3). The baffle plate (8) has a closed position and a material feeding position. In the closed position, the baffle plate (8) covers the assembly parts located above the guide cavity (12) in the storage box (7). In the material feeding position, the baffle plate (8) releases the cover on the bottom assembly parts, allowing a single assembly part to enter the corresponding guide cavity (12).

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