An automatic folding device for automobile sheet metal parts

Abstract

The application discloses an automatic flanging device for automobile sheet metal parts and relates to the technical field of sheet metal machining. The triangular limiting plate and the rolling wheel are integrated in the device shell covering space, and the arc-shaped groove is adapted to the connection shaft revolution track, the in-situ indexing switching effect is realized without leaving the working space, the mechanical arm movement stroke is greatly shortened, the production rhythm and path continuity in the compact environment are improved, and thus the defects that the robot must first perform the axial lifting action to make the flanging head completely separate from the working space before indexing rotation in the switching process of the prior art are compensated, the frequent rising, rotating and descending greatly increase the movement stroke and lead to long production rhythm, and the compact machining environment cannot be adapted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sheet metal processing, and particularly relates to an automatic flanging device for automobile sheet metal parts. BACKGROUND

[0002] In the automobile manufacturing process, the flanging of sheet metal parts is a crucial process. The flanging process is usually used for the connection of inner and outer plates of cover parts such as doors, engine covers and trunk covers. By folding and covering the edge of the outer plate on the inner plate, a high-strength mechanical connection and good appearance sealing are achieved. The current automatic flanging device for automobile sheet metal mainly relies on an industrial robot to complete the task with a mounted execution head.

[0003] The automatic flanging device for automobile sheet metal in the prior art is usually composed of an industrial robot end-mounted square flanging head. The power is transmitted to the main shaft through a reducer by a single motor. During operation, the mechanical arm drives the flanging head to move along the edge, and the fixed roller installed on the side is used to extrude and form the sheet metal part. However, in the switching process, due to the large rotating radius of the square flanging head and the exposed structure, the robot must first perform a large axial lifting action to completely separate the flanging head from the working space before indexing rotation, which greatly increases the motion stroke and leads to a long production rhythm, making it difficult to adapt to compact processing environments. Secondly, the transmission force balance and rigid locking ability are insufficient. The existing single cantilever driving structure is prone to force imbalance and deflection of the main shaft under the reaction force of high-strength rolling. The locking mainly relies on motor electronic self-locking or friction braking, which lacks physical hard limiting. In the face of thick plate parts, it is easy to cause small displacement or gear slipping, resulting in uneven flanging pressure and difficulty in ensuring process consistency and accelerating mechanical wear.

[0004] In view of the above technical defects, a solution is proposed. SUMMARY

[0005] The purpose of the present application is to integrate the triangular limiting plate and the rolling wheel in the device shell covering space, and use the arc-shaped groove to adapt to the connection shaft revolution track, to achieve the effect of in-situ indexing switching without leaving the working space, greatly shortening the mechanical arm motion stroke, improving the production rhythm and path continuity in compact environment, thereby making up for the defects of the prior art in the switching process. Due to the large rotating radius of the square flanging head and the exposed structure, the robot must first perform a large axial lifting action to completely separate the flanging head from the working space before indexing rotation, which greatly increases the motion stroke and leads to a long production rhythm, making it difficult to adapt to compact processing environments.

[0006] In order to achieve the above object, the present application adopts the following technical scheme: An automatic flanging device for automobile sheet metal parts comprises a device shell and an arc-shaped groove, the arc-shaped groove is arranged on one side and the other side surface of the inner wall of the device shell, one side surface of the device shell is provided with an engaging groove, one side surface of the device shell is fixedly installed with a positioning bearing, the inner wall of the positioning bearing is fixedly installed with a main shaft, the outer side surface of the main shaft is fixedly installed with a first helical gear, the outer side surface of the first helical gear is fixedly installed with a spur gear, one side surface of the spur gear is provided with a limiting ring, one side surface of the device shell is installed with a driving mechanism, the inner wall of the limiting ring is installed with a rotating assembly.

[0007] The rotating assembly comprises a rotating ring, the rotating ring is slidingly installed on the inner wall of the limiting ring, one side surface of the rotating ring is fixedly installed with a limiting plate, the inner wall of the limiting plate is fixedly installed with a rotating bearing, the inner wall of the rotating bearing is fixedly installed with a connecting shaft, the outer side surface of the connecting shaft is fixedly installed with a driven gear, the outer side surface of the connecting shaft is fixedly installed with a rolling wheel, and the end of the connecting shaft is provided with a positioning hole.

[0008] Further, the arc-shaped groove is two, the two arc-shaped grooves are respectively distributed on one side and the other side surface of the inner wall of the device shell, the positioning bearing is two and is respectively distributed on one side and the other side surface of the device shell, the main shaft is fixedly connected with the inner walls of the two positioning bearings, the main shaft is rotatably connected between the positioning bearing and the device shell, the first helical gear is two and is equidistantly distributed on the outer side surface of the main shaft, the outer side surface of each first helical gear is correspondingly provided with a spur gear, and one side surface of each spur gear is correspondingly provided with a limiting ring.

[0009] Further, the limiting plate is two, the two limiting plates are respectively distributed on one side surface of the two spur gears, one side surface of the two limiting plates is correspondingly provided with a rotating ring, the two limiting plates are rotatably connected with the limiting rings installed on one side surface of the two spur gears through the rotating ring, the rotating bearing is six, and every three rotating bearings are a group and are respectively distributed on one side surface of the two limiting plates.

[0010] Further, the connecting shaft is three, each connecting shaft is fixedly connected with the inner walls of the two rotating bearings, the connecting shaft is rotatably connected between the rotating bearing and the limiting plate, the outer side surface of each connecting shaft is correspondingly provided with a rolling wheel, the driven gear is six, and every two driven gears are a group and are respectively distributed on the outer side surface of the three connecting shafts, the driven gears and the spur gears are meshed with each other, and the end of each connecting shaft is correspondingly provided with a positioning hole.

[0011] Further, the driving mechanism comprises a switching assembly and a driving assembly, the switching assembly comprises a limiting hole, the limiting hole is arranged on one side and the other side surface of the equipment shell, the one side surface of the equipment shell is fixedly installed with an electric telescopic rod, and the extending end of the electric telescopic rod is installed with a limiting column.

[0012] Further, the electric telescopic rod is two, the two electric telescopic rods are respectively distributed on one side and the other side surface of the equipment shell, the output end of each electric telescopic rod is correspondingly distributed with a limiting column, the outer side surface of the limiting column is slidably connected with the inner wall of the limiting hole, and one end of the limiting column is rotatably inserted into the inner wall of the limiting hole.

[0013] Further, the driving assembly comprises a connecting arm, the connecting arm is fixedly installed on the top end surface of the equipment shell, the one side surface of the connecting arm is installed with a transmission bearing, the inner wall of the transmission bearing is fixedly installed with a driving shaft, the bottom end surface of the driving shaft is installed with a second helical gear, the one side surface of the equipment shell is installed with a protective plate, the outer side surface of the driving shaft is engaged with a speed reduction gear, and the top end surface of the connecting arm is fixedly installed with a driving motor.

[0014] Further, the transmission bearing is two, the two transmission bearings are respectively distributed on the one side and the other side surface of the connecting arm, the inner wall of each transmission bearing is fixedly installed with a driving shaft, the driving shaft is rotatably connected between the transmission bearing and the connecting arm, the bottom end of each driving shaft is correspondingly distributed with a second helical gear, the two second helical gears are respectively engaged with the two first helical gears for mutual transmission, the outer side surfaces of the two driving shafts are correspondingly distributed with speed reduction gears, the two speed reduction gears are mutually engaged for transmission, and the output end of the driving motor is fixedly connected with the top end of one speed reduction gear.

[0015] As described above, due to the adoption of the above technical scheme, the beneficial effects of the present application are:

[0016] 1、The automobile sheet metal part automatic flanging device integrates the triangular limiting plate and the rolling wheel in the equipment shell cladding space, and uses the arc-shaped groove to adapt the connection shaft orbit, realizes the effect of in-situ indexing switching without leaving the working space, greatly shortens the mechanical arm movement stroke, improves the production rhythm and path continuity in the compact environment, and makes up for the defects that the robot must first perform a large amplitude axial lifting action to make the flanging head completely leave the working space before indexing rotation, which greatly increases the movement stroke and leads to long production rhythm, and cannot adapt to the compact processing environment.

[0017] 2、The automobile sheet metal part automatic flanging device, through the electric telescopic rod drive limit column axial plug-in connection shaft positioning hole, cooperate with double drive shaft synchronous reverse transmission structure, realizes the mechanical hard locking and the effect of main shaft stress balance, eliminates the displacement sliding gear under high strength rolling and the main shaft yaw phenomenon, significantly enhances the process rigidity, ensures the flanging precision and equipment life, thereby makes up the existing technology existing single cantilever drive architecture under the reaction force of high strength rolling easy to make the main shaft stress imbalance produces yaw, and its locking is mainly dependent on motor electronic self-locking or friction braking, lack of physical hard limit, when facing thick plate, it is easy to cause small displacement or sliding gear, leading to uneven flanging pressure, it is difficult to ensure the process consistency and accelerates the mechanical wear and tear defects. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall external structure schematic diagram of the present application is shown.

[0019] Figure 2 Another angle overall external structure schematic diagram of the present application is shown.

[0020] Figure 3 The connecting arm internal structure schematic diagram of the present application is shown.

[0021] Figure 4 The protective plate internal structure schematic diagram of the present application is shown.

[0022] Figure 5 The overall internal structure schematic diagram of the present application is shown.

[0023] Figure 6 The overall internal side structure schematic diagram of the present application is shown.

[0024] Figure 7 The limiting plate structure schematic diagram of the present application is shown.

[0025] Figure 8 The limiting plate internal structure schematic diagram of the present application is shown.

[0026] Figure 9 Another angle limiting plate internal structure schematic diagram of the present application is shown.

[0027] Figure 10 The rolling wheel external of the present application is shown.

[0028] Legend: 1, device shell; 101, arc-shaped groove; 102, meshing groove; 103, positioning bearing; 104, main shaft; 105, first bevel gear; 106, spur gear; 107, limiting ring; 2, rotating ring; 201, limiting plate; 202, rotating bearing; 203, connecting shaft; 204, driven gear; 205, rolling wheel; 206, positioning hole; 3, limiting hole; 301, electric telescopic rod; 302, limiting column; 4, connecting arm; 401, transmission bearing; 402, drive shaft; 403, second bevel gear; 404, protective plate; 405, speed reduction gear; 406, drive motor. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] It should be noted that in the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] As Figures 1-10 shown, an automatic flanging device for automobile sheet metal parts includes a device shell 1, two arc-shaped grooves 101 are symmetrically arranged on the inner wall of the device shell 1, and a meshing groove 102 is arranged on one side surface of the device shell 1;

[0032] Positioning bearings 103 are fixedly installed on the two side surfaces of the device shell 1, and the two ends of the transversely arranged main shaft 104 are respectively fixedly connected with the inner walls of the two positioning bearings 103, so as to realize the rotational connection between the main shaft 104 and the device shell 1. On the outer side surface of the main shaft 104, two first bevel gears 105 are fixedly installed at equal intervals, and a spur gear 106 is correspondingly installed on the outer side surface of each first bevel gear 105. A limiting ring 107 is arranged on one side surface of each spur gear 106.

[0033] In the embodiment of the present application, when the device switches the roller station, the mechanical arm does not need to drive the execution head to lift axially by a large amplitude, and the device can directly adjust the machine at the working position close to the workpiece. With the uniform rotation of the main shaft 104 and the central spur gear 106, the tangential thrust generated by the meshing of the spur gear 106 drives the rotating ring 2 to slide along the inner wall of the limiting ring 107 on the side of the spur gear 106, drives the triangular limiting plate 201, the driven gear 204 and the connecting shaft 203 to revolve around the center line of the main shaft 104, and in this dynamic process, the end of the connecting shaft 203 slides along the preset track of the arc-shaped groove 101.

[0034] Referring to Figures 1-10 Specifically, the rotating assembly includes two rotating rings 2, which are slidingly installed on the inner walls of the two limiting rings 107. One side surface of each of the two rotating rings 2 is fixedly installed with a limiting plate 201, and one side surface of each of the two limiting plates 201 is provided with six rotating bearings 202, and every three of the six rotating bearings 202 are distributed on one side surface of each of the two limiting plates 201.

[0035] The connecting shaft 203 is fixedly connected with the inner walls of the two rotating bearings 202, and the connecting shaft 203 is rotatably connected between the rotating bearing 202 and the limiting plate 201. The outer side surface of each connecting shaft 203 is correspondingly provided with a rolling wheel 205. The driven gear 204 is six, and every two of the six driven gears 204 are distributed on the outer side surface of each of the three connecting shafts 203, and the driven gears 204 and the spur gears 106 are meshed with each other. The end of each connecting shaft 203 is correspondingly provided with a positioning hole 206.

[0036] In the embodiment of the present application, under the physical condition that the limiting plate 201 is completely fixed, the driven gear 204 drives the connecting shaft 203 to rotate at high speed in place under the support of the rotating bearing 202, and further drives the rolling wheel 205 at the end to generate continuous rolling energy. At this time, the external industrial robot drives the device to move along the spatial curve of the edge of the automobile sheet metal part according to the preset teaching track, the rolling wheel 205 generates friction heat and mechanical pressure by high-speed rotation, cooperates with the constant axial vertical downward pressure provided by the mechanical arm, and the auxiliary physical constraint positioning of the side engagement groove 102 of the equipment shell 1 to the edge path, and the edge of the sheet metal is curled, folded and finally pressed into the angle preset in the mold, and the edge folding task is completed. During the whole continuous operation, the positioning bearing 103 guarantees the coaxiality of the main shaft 104 under the complex alternating load, and all the reverse impact loads generated in the edge folding process are directly unloaded to the rigid bearing mechanism of the equipment shell 1 through the limiting column 302, avoiding unnecessary shear stress directly borne by the internal precision gear, and ensuring the mechanical precision and process consistency of the device in long-term operation cycle.

[0037] Referring toFigures 1-10 Specifically, the driving mechanism comprises a switching assembly and a driving assembly, the switching assembly comprises limiting holes 3, two electric telescopic rods 301 and two limiting columns 302, the limiting holes 3 are arranged on one side and the other side surface of the equipment shell 1 respectively, the two electric telescopic rods 301 are fixedly installed on one side and the other side surface of the equipment shell 1 respectively, and the extending end of each electric telescopic rod 301 is correspondingly provided with a limiting column 302.

[0038] The outer side surface of the limiting column 302 is in sliding connection with the inner wall of the limiting hole 3, and one end of the limiting column 302 is in rotary plug connection with the inner wall of the positioning hole 206.

[0039] In the embodiment of the application, when the rotation displacement of 120 degrees is completed, the rotation state of the equipment can be confirmed by the existing technology infrared sensor cooperating with the receiver, when the rotation is completed, the electric telescopic rod 301 drives the limiting column 302 to horizontally extend instantaneously, passes through the limiting hole 3 on the side of the equipment shell 1 and is plugged into the positioning hole 206 at the end of the connecting shaft 203 in the working position, the mechanical interference action rigidly locks the limiting plate 201 on the overall framework of the equipment shell 1, so that the limiting plate 201 completely loses the free degree of revolution, then the driving motor 406 is switched to the preset working speed, the power is transmitted to the main shaft 104 and the central spur gear 106 along the original path, since the limiting plate 201 has been locked, the torque generated by the rotation of the spur gear 106 cannot be converted into the revolution kinetic energy, but is fully converted into the normal driving force acting on the tooth surface of the driven gear 204.

[0040] The driving assembly comprises a connecting arm 4, the connecting arm 4 is fixedly installed on the top end surface of the equipment shell 1, the side surface of the connecting arm 4 is provided with a transmission bearing 401, the inner wall of the transmission bearing 401 is fixedly installed with a driving shaft 402, the bottom end surface of the driving shaft 402 is provided with a second helical gear 403, the side surface of the equipment shell 1 is provided with a protective plate 404, the outer side surface of the driving shaft 402 is engaged with a speed reducer 405, and the top end surface of the connecting arm 4 is fixedly installed with a driving motor 406; the transmission bearing 401 is two, the two transmission bearings 401 are distributed on one side and the other side surface of the connecting arm 4 respectively, the inner wall of each transmission bearing 401 is fixedly installed with a driving shaft 402, the driving shaft 402 is in rotary connection between the transmission bearing 401 and the connecting arm 4, the bottom end of each driving shaft 402 is correspondingly provided with a second helical gear 403, the two second helical gears 403 are in mutual engagement transmission with the two first helical gears 105 respectively, the outer side surfaces of the two driving shafts 402 are correspondingly provided with speed reducers 405, the two speed reducers 405 are in mutual engagement transmission, and the output end of the driving motor 406 is fixedly connected with the top end of one speed reducer 405.

[0041] Specific use process: in the initial preparation stage, first through the connecting arm 4 the overall frame of the device and the end of the industrial robot flange rigid bolt connection, and synchronous access control electric telescopic rod 301 and drive motor 406 electrical circuit, before the actual processing cycle, by another equipped with vacuum chuck assembly material handling robot arm will be processed from the original car sheet metal parts from the rack accurate take out, and stable placed in the pre-set base fold edge mold cavity, through the mold with hydraulic side pressure mechanism or pneumatic pressure assembly the edge and the main part of the automobile sheet metal parts for all-round physical fixed, for the subsequent high pressure rolling forming process to establish a stable physical support reference.

[0042] When the process needs to switch different specifications of rolling wheel 205 according to the thickness or edge curvature radius of sheet metal, the device enters the in situ station switching mode, at this time, the electric telescopic rod 301 installed on the inner wall of the equipment shell 1 is completely symmetrical, and the electric telescopic rod 301 is started and kept completely retracted, so that the limiting column 302 at the end of the electric telescopic rod 301 passes through the limiting hole 3 on the equipment shell 1 and completely separates from the positioning hole 206 at the end of the current connecting shaft 203. This action releases the rotation constraint of the triangular limiting plate 201 and its load assembly under the support of the three sets of rotating bearings 202, so that it is in the standby state of free revolution. Subsequently, the drive motor 406 starts to output torque. The power is first transmitted to the two vertical parallel drive shafts 402 through the transmission bearing 401 to realize synchronous rotation through the transmission bearing 401. The power is transmitted to the horizontally arranged main shaft 104 through the second bevel gear 403 at the end of the drive shaft 402 and the first bevel gear 105 at both ends of the main shaft 104.

[0043] Since the triangular limiting plate 201 and the three sets of rolling wheels 205 are integrated in the internal covering space of the equipment shell 1, and the rotating radius of the connecting shaft 203 when revolving is matched with the track height of the arc-shaped groove 101 opened on the inner wall of the equipment shell 1, the whole rotating assembly is limited in the contour range of the equipment shell 1 in the spatial dimension. Compared with the traditional square fold edge head which needs to be lifted as a whole to avoid the interference between the sheet metal part and the mold, the device does not need to lift the execution head by the mechanical arm for a large amplitude in the axial direction when switching the roller station. It can directly adjust the machine near the workpiece. With the uniform rotation of the main shaft 104 and the center spur gear 106, the tangential thrust generated by the meshing of the spur gear 106 drives the rotating ring 2 to slide along the inner wall of the limiting ring 107 on the side of the spur gear 106, driving the triangular limiting plate 201, the driven gear 204 and the connecting shaft 203 to revolve around the center line of the main shaft 104. In this dynamic process, the end of the connecting shaft 203 slides along the preset track of the arc-shaped groove 101.

[0044] When the 120-degree rotational displacement is completed, the rotation state of the device can be confirmed by the prior art infrared sensor cooperating with the receiver. When the rotation is completed, the electric telescopic rod 301 drives the limiting column 302 to extend horizontally at this time, passes through the limiting hole 3 on the side of the device shell 1, and is inserted into the positioning hole 206 at the end of the connecting shaft 203 in the working position in a plug-in manner. The mechanical interference action rigidly locks the limiting plate 201 on the overall framework of the device shell 1, so that it completely loses the free degree of revolution. Subsequently, the driving motor 406 is switched to the preset working speed, and the power is transmitted to the main shaft 104 and the center spur gear 106 along the original path. Since the limiting plate 201 has been locked, the torque generated by the rotation of the spur gear 106 cannot be converted into the revolution kinetic energy, but is fully converted into the normal driving force acting on the tooth surface of the driven gear 204.

[0045] Under the physical premise that the limiting plate 201 is completely fixed, the driven gear 204 drives the connecting shaft 203 to produce high-speed self-rotation on the spot under the support of the rotating bearing 202, thereby driving the end rolling wheel 205 to produce continuous rolling kinetic energy. At this time, the external industrial robot moves the device along the spatial curve of the edge of the automobile sheet metal part according to the preset teaching trajectory. The rolling wheel 205 generates friction heat and mechanical pressure by high-speed self-rotation, cooperates with the constant axial vertical downward pressure provided by the mechanical arm, and the auxiliary physical constraint positioning of the edge path by the side engagement groove 102 of the device shell 1, and curls, folds and finally presses the edge of the sheet metal into the preset angle of the mold, completes the flanging task. During the entire continuous operation, the positioning bearing 103 guarantees the coaxiality of the main shaft 104 under complex alternating loads. All reverse impact loads generated during the flanging process are directly unloaded to the rigid bearing mechanism of the device shell 1 through the limiting column 302, avoiding unnecessary shear stress directly borne by the internal precision gear, and ensuring the mechanical precision and process consistency of the device under long-term operation cycle.

[0046] The above are preferred embodiments of the present application, but do not limit the protection scope of the present application. Therefore, any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic bending device for automotive sheet metal parts, comprising a housing (1) and an arc-shaped groove (101), wherein the arc-shaped groove (101) is formed on one side and the other side surface of the inner wall of the housing (1), characterized in that: A meshing groove (102) is provided on one side surface of the equipment housing (1). A positioning bearing (103) is fixedly installed on one side surface of the equipment housing (1). A main shaft (104) is fixedly installed on the inner wall of the positioning bearing (103). A first helical gear (105) is fixedly installed on the outer surface of the main shaft (104). A spur gear (106) is fixedly installed on the outer surface of the first helical gear (105). A limit ring (107) is provided on one side surface of the spur gear (106). A drive mechanism is installed on one side surface of the equipment housing (1). A rotating component is installed on the inner wall of the limit ring (107). The rotating assembly includes a rotating ring (2), which is slidably mounted on the inner wall of a limiting ring (107). A limiting plate (201) is fixedly mounted on one side surface of the rotating ring (2). A rotating bearing (202) is fixedly mounted on the inner wall of the limiting plate (201). A connecting shaft (203) is fixedly mounted on the inner wall of the rotating bearing (202). A driven gear (204) is fixedly mounted on the outer surface of the connecting shaft (203). A rolling roller (205) is fixedly mounted on the outer surface of the connecting shaft (203). A positioning hole (206) is provided at the end of the connecting shaft (203).

2. The automatic bending device for automotive sheet metal parts according to claim 1, characterized in that, There are two arc-shaped grooves (101), which are respectively distributed on one side and the other side of the inner wall of the equipment housing (1). There are two positioning bearings (103), which are respectively distributed on one side and the other side of the equipment housing (1). The main shaft (104) is fixedly connected to the inner wall of the two positioning bearings (103). The main shaft (104) is rotatably connected to the equipment housing (1) through the positioning bearings (103). There are two first helical gears (105) that are equally distributed on the outer surface of the main shaft (104). Each outer surface of the first helical gear (105) is correspondingly distributed with a spur gear (106). Each side surface of the spur gear (106) is correspondingly distributed with a limiting ring (107).

3. The automatic bending device for automotive sheet metal parts according to claim 1, characterized in that, There are two limiting plates (201), which are respectively distributed on one side surface of the two spur gears (106). Rotating rings (2) are correspondingly distributed on one side surface of the two limiting plates (201). The two limiting plates (201) are rotatably connected to the limiting rings (107) installed on one side surface of the two spur gears (106) through the rotating rings (2). There are six rotating bearings (202), which are distributed in groups of three on one side surface of the two limiting plates (201).

4. The automatic bending device for automotive sheet metal parts according to claim 1, characterized in that, There are three connecting shafts (203), each of which is fixedly connected to the inner wall of two rotary bearings (202). The connecting shafts (203) are rotatably connected to the limiting plate (201) through the rotary bearings (202). Rolling rollers (205) are distributed on the outer surface of each connecting shaft (203). There are six driven gears (204), which are distributed in pairs on the outer surface of the three connecting shafts (203). The driven gears (204) mesh with the spur gears (106). A positioning hole (206) is provided at the end of each connecting shaft (203).

5. The automatic bending device for automotive sheet metal parts according to claim 1, characterized in that, The drive mechanism includes a switching component and a drive component. The switching component includes a limiting hole (3). The limiting hole (3) is disposed on one side and the other side surface of the equipment housing (1). An electric telescopic rod (301) is fixedly installed on one side surface of the equipment housing (1). A limiting post (302) is installed at the extended end of the electric telescopic rod (301).

6. The automatic bending device for automotive sheet metal parts according to claim 5, characterized in that, There are two electric telescopic rods (301), which are respectively distributed on one side and the other side of the equipment housing (1). Each electric telescopic rod (301) has a corresponding limit post (302) at its output end. The outer surface of the limit post (302) is slidably connected to the inner wall of the limit hole (3), and one end of the limit post (302) is rotatably inserted into the inner wall of the positioning hole (206).

7. The automatic bending device for automotive sheet metal parts according to claim 5, characterized in that, The drive assembly includes a connecting arm (4), which is fixedly installed on the top surface of the equipment housing (1). A transmission bearing (401) is installed on one side surface of the connecting arm (4). A drive shaft (402) is fixedly installed on the inner wall of the transmission bearing (401). A second helical gear (403) is installed on the bottom surface of the drive shaft (402). A protective plate (404) is installed on one side surface of the equipment housing (1). A reduction gear (405) meshes on the outer surface of the drive shaft (402). A drive motor (406) is fixedly installed on the top surface of the connecting arm (4).

8. The automatic bending device for automotive sheet metal parts according to claim 7, characterized in that, There are two transmission bearings (401), which are respectively distributed on one side and the other side of the connecting arm (4). A drive shaft (402) is fixedly installed on the inner wall of each transmission bearing (401). The drive shaft (402) is rotatably connected to the connecting arm (4) through the transmission bearing (401). A second helical gear (403) is distributed at the bottom of each drive shaft (402). The two second helical gears (403) mesh with the two first helical gears (105) respectively. A reduction gear (405) is distributed on the outer surface of each of the two drive shafts (402). The two reduction gears (405) mesh with each other. The output end of the drive motor (406) is fixedly connected to the top of one of its reduction gears (405).

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