Turnover device for impact extrusion of bolt holes

Abstract

The invention provides a turnover device for impact extrusion of bolt holes. The turnover device comprises a rack, a lifting assembly, a front conveying assembly, a turnover assembly and a rear conveying assembly. The lifting assembly is arranged right in front of a lower die of a punching machine and used for stably lifting out the hub inner ring obtained after punching and extruding are completed from the upper end of the lower die and transversely transferring the hub inner ring to the front conveying assembly. The lifting assembly comprises a moving mechanism, a lifting mechanism and a lifting mechanism, the moving mechanism is installed on the front side of the lower end of the rack, the lifting mechanism is fixed to the moving end of the moving mechanism, and the lifting mechanism is fixed to the top end of the lifting mechanism. Through cooperation of the lifting assembly, the conveying assembly and the overturning assembly, lifting, precise conveying and stable overturning of the hub inner ring after impact extrusion are achieved, manual taking, transferring and guiding operation is not needed, and the problems that manual taking is high in labor intensity and low in efficiency, and potential safety hazards exist are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, and in particular to a device for flipping punched bolt holes. Background Technology

[0002] As a core load-bearing component of vehicles such as automobiles and construction machinery, the structural stability of the wheel hub directly affects the driving safety of the vehicle. The inner ring of the wheel hub, as a key part connecting the wheel hub to the axle and braking system, requires multiple evenly distributed bolt holes to be machined on its annular end face to achieve the fixed installation of the wheel hub.

[0003] The specific structure and process of the existing wheel hub inner ring bolt hole stamping process are as follows: The stamping equipment mainly consists of an upper die, a lower die, and a stamping drive mechanism. The surface of the lower die is provided with an annular positioning groove that precisely matches the outer circle contour of the inner ring of the wheel hub. A punching die is set at the bottom of the positioning groove corresponding to the bolt hole position. A punching punch is fixed at the bottom of the upper die corresponding to the die position. During stamping, the inner ring blank of the wheel hub is placed into the annular positioning groove of the lower die. Radial positioning is achieved through the positioning groove. Then, the stamping drive mechanism drives the upper die to move downward. The punch and the die cooperate to complete the stamping and forming of the inner ring bolt hole of the wheel hub.

[0004] However, during the aforementioned processing, after the bolt holes are punched, the inner ring of the wheel hub is tightly stuck in the annular positioning groove of the lower die due to the adhesion and friction after stamping. It is difficult to quickly detach from the die, and subsequent processing (such as bolt hole chamfering, tapping, inner ring grinding, etc.) requires flipping the inner ring of the wheel hub. Currently, some companies have installed a simple push rod lifting structure at the bottom of the positioning groove of the lower die of the stamping machine to reduce labor intensity. That is, several push rods are driven by cylinders to extend upward and push the inner ring of the wheel hub out of the positioning groove. However, this structure has obvious defects: First, the contact area between the push rod and the inner ring of the wheel hub is small, and the inner ring of the wheel hub is subjected to uneven force during ejection, which is prone to local deformation and affects the accuracy of subsequent processing; Second, the push rod can only achieve vertical lifting and cannot achieve lateral movement. The ejected inner ring of the wheel hub still needs to be manually transferred and flipped onto the conveying device. During the transfer process, the inner ring of the wheel hub is prone to displacement and tilting, which makes it impossible to accurately position the subsequent conveying and flipping processes, further reducing production efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the existing technology. The present invention proposes a flipping device for punching bolt holes.

[0006] To address the aforementioned issue of some companies using simple push-rod lifting structures at the bottom of the positioning groove of the lower die of a stamping press to reduce labor intensity, which involves using cylinders to drive several push rods upwards to eject the inner ring of the wheel hub from the positioning groove, this structure has significant drawbacks: First, the contact area between the push rods and the inner ring of the wheel hub is small, resulting in uneven force on the inner ring during ejection, which can easily lead to localized deformation and affect the accuracy of subsequent processing. Second, the push rods can only achieve vertical lifting and cannot move laterally. The ejected inner ring still needs to be manually transferred and flipped onto a conveying device. During the transfer process, the inner ring is prone to shifting and tilting, making it difficult to accurately position it in subsequent conveying and flipping processes, further reducing production efficiency. The technical solution adopted in this invention is: A flipping device for punching bolt holes includes: a frame, a lifting assembly, a front conveying assembly, a flipping assembly, and a rear conveying assembly; The lifting assembly is located directly in front of the lower die of the stamping press and is used to smoothly lift the inner ring of the wheel hub after stamping from the upper end of the lower die and transfer it laterally to the front conveying assembly. The lifting assembly includes a moving mechanism, a lifting mechanism and a supporting mechanism. The moving mechanism is installed on the front side of the lower end of the frame. The lifting mechanism is fixed to the moving end of the moving mechanism. The supporting mechanism is fixed to the top of the lifting mechanism and is coaxial with the lower die of the stamping press. The flipping component is located at the middle of the upper end of the frame and is connected to the conveying direction of the front conveying component. It is used to flip the inner ring of the wheel hub conveyed by the front conveying component and convey it to the rear conveying component. The flipping component includes a middle conveying mechanism, a guiding mechanism and a flipping mechanism.

[0007] Preferably, the moving mechanism includes a moving cavity, a lead screw, a guide rail, a slider, a servo motor, and a moving base. The moving cavity is located at the front of the lower end of the frame. The guide rail is installed parallel to the conveying direction of the moving cavity. The slider is slidably mounted on the upper end of the guide rail. The lead screw is rotatably connected to the middle of the moving cavity. The servo motor is located at the rear end of the moving cavity, and its output shaft is connected to the lead screw. The moving base is located at the upper end of the slider, and its lower end is threadedly connected to the lead screw. The lifting mechanism is installed on the upper end of the moving base and is used to drive the lifting mechanism to move.

[0008] Preferably, the lifting mechanism includes a mounting base, a first electric telescopic rod, and two guide rods. The mounting base is fixedly mounted on the upper end of the movable seat. The first electric telescopic rod is disposed in the middle of the lower end of the mounting base. The guide rods are slidably connected to both sides of the upper end of the mounting base. The bottom of the lifting mechanism is connected to the telescopic part of the upper end of the first electric telescopic rod and the top of the guide rods, and is used to push the lifting mechanism to move up and down.

[0009] Preferably, the lifting mechanism includes a lifting plate, two lifting frames, and a buffer pad. The lifting plate is disposed on the upper telescopic part of the first electric telescopic rod and the top of the guide rod. The two lifting frames are symmetrically disposed in an L-shape on the upper part of the lifting plate. The upper ends of the lifting frames extend to both sides of the lower end of the stamping machine's lower die, and are used to lift both sides of the lower end of the inner ring of the wheel hub. The buffer pad is disposed on the upper end of the lifting frame.

[0010] Preferably, the front conveying assembly and the rear conveying assembly are respectively installed on the front and rear sides of the upper end of the frame. The front conveying assembly is arranged parallel to the lifting assembly. The conveying direction of the front conveying assembly is towards the flipping assembly, and it is used to smoothly convey the inner ring of the wheel hub transferred by the lifting assembly to the flipping assembly. The rear conveying assembly is connected to the conveying direction of the flipping assembly, and it is used to convey the inner ring of the wheel hub after it has been flipped by the flipping assembly to the rear.

[0011] Preferably, the front conveying assembly and the rear conveying assembly each include a drive motor, a synchronous pulley, a conveying pulley, a conveyor belt, and a tensioning pulley. The drive motor is located on the front and rear sides of the upper end of the frame. The output shaft of the drive motor is connected to the synchronous pulley. The conveying pulley and the tensioning pulley are rotatably connected to the outside of the frame. The conveyor belt is driven to the outer ends of the conveying pulley and the tensioning pulley, and is used to drive the inner ring of the hub to move and convey.

[0012] Preferably, the surface of the conveyor belt is uniformly provided with a plurality of positioning protrusions arranged along the conveying direction for axial positioning of the inner ring of the hub during the conveying process.

[0013] Preferably, the middle conveying mechanism is installed in the middle of the flipping assembly and is used to convey the inner wheel ring of the wheel hub from the front conveying assembly to the rear. The middle conveying mechanism has the same structural layout as the front conveying assembly and the rear conveying assembly. The guiding mechanism is installed on the front side of the flipping assembly and is used to guide the inner wheel ring of the wheel hub conveyed by the middle conveying mechanism to the center. The flipping mechanism is installed on the rear side of the flipping assembly and is used to flip the inner wheel ring of the wheel hub conveyed by the middle conveying mechanism.

[0014] Preferably, the guiding mechanism includes two side plates, a second electric telescopic rod, a guide platform, a guide motor, a transmission wheel, a guide wheel, and a guide belt. The side plates are disposed on both sides of the upper end of the frame. The second electric telescopic rod is mounted on the outer side of the side plates. The guide platform is slidably connected to the upper end of the side plates, and the telescopic portion of the side end of the second electric telescopic rod is connected to the guide platform. The guide motor is disposed on the side end of the guide platform, and the upper output shaft portion of the guide motor is connected to the transmission wheel. The guide wheel is rotatably connected to the upper end of the guide platform. The guide belt is drively connected to the outer ends of the transmission wheel and the guide wheel. A sliding rod is disposed on the outer wall of the upper end of the frame, and the sliding rod is slidably connected through the lower end of the guide platform for horizontal sliding limit of the guide platform.

[0015] Preferably, the flipping mechanism includes a motor bracket, a flipping motor, a pulley assembly, a flipping shaft, and a flipping disc. The motor bracket is located on the upper end of the frame, and the flipping motor is located on the outer side of the motor bracket. The inner output shaft of the flipping motor is connected to the pulley assembly for transmission, and the pulley assembly is connected to the flipping shaft for transmission. The flipping shaft is rotatably connected to the middle of the upper end of the frame. The flipping disc is connected to the outer curved surfaces on both sides of the flipping shaft. The outer end of the flipping disc has a flipping groove that matches the outer end of the inner ring of the hub, and there are several flipping grooves, which are symmetrically distributed sequentially around the outer end of the flipping disc.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention achieves lifting, precise conveying, and stable flipping of the inner ring of the wheel hub after extrusion through the coordinated operation of the lifting component, conveying component, and flipping component. It eliminates the need for manual handling of parts, transfer, and guiding operations, effectively solving the problems of high labor intensity, low efficiency, and safety hazards associated with manual parts handling.

[0017] The lifting mechanism of this invention is driven by a first electric telescopic rod, in conjunction with a guide rod, to ensure that the lifting mechanism is stable and tilt-free. The lifting mechanism adopts an L-shaped lifting frame design, in conjunction with a buffer pad, to avoid contact with the outer surface of the inner ring of the wheel hub and bolt holes. This not only alleviates the lifting impact force, but also effectively avoids problems such as product deformation, surface scratches and bolt hole burrs falling off, thus improving the product processing quality.

[0018] The conveying assembly of this invention uses an anti-slip conveyor belt, along with positioning protrusions and a guiding mechanism, to stably convey and precisely guide the inner ring of the wheel hub, preventing deviation, tilting, and slippage during conveying. The synchronized operating rhythm of each component ensures smooth transitions between processes, improving production continuity. The flipping assembly uses a flipping wheel and flipping groove to achieve a precise 180° flip of the inner ring of the wheel hub. After flipping, the bolt hole positions of the inner ring of the wheel hub are precisely aligned with subsequent processing stations, effectively ensuring the accuracy of subsequent processing. Attached Figure Description

[0019] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 ; Figure 4 This is a schematic diagram of the structure at point A of the present invention; Figure 5 This is a schematic diagram of the structure at point B of the present invention; Figure 6 This is a schematic diagram of the structure at point C of the present invention; Figure 7 This is a schematic diagram of the structure at point D of the present invention.

[0020] Reference numerals: 1. Frame; 2. Lifting assembly; 201. Moving mechanism; 202. Lifting mechanism; 203. Supporting mechanism; 3. Front conveying assembly; 301. Drive motor; 302. Synchronous pulley; 303. Conveying pulley; 304. Conveyor belt; 305. Tensioning pulley; 4. Tilting assembly; 401. Moving cavity; 402. Lead screw; 403. Guide rail; 404. Slider; 405. Servo motor; 406. Moving seat; 5. Rear conveying assembly; 501. Mounting base; 502. First electric telescopic rod 503, Guide rod; 6, Middle conveying mechanism; 601, Lifting plate; 602, Lifting frame; 603, Buffer pad; 7, Guiding mechanism; 8, Tilting mechanism; 801, Side plate; 802, Second electric telescopic rod; 803, Guide platform; 804, Guide motor; 805, Transmission wheel; 806, Guide wheel; 807, Guide belt; 808, Slide rod; 901, Motor bracket; 902, Tilting motor; 903, Pulley assembly; 904, Tilting shaft; 905, Tilting disc; 906, Tilting groove. Detailed Implementation

[0021] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0022] Specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0023] Please see Figures 1-7 , This embodiment proposes a flipping device for punching bolt holes, including a frame 1, a lifting component 2, a front conveying component 3, a flipping component 4, and a rear conveying component 5. The lifting component 2 is installed on the front side of the lower end of the frame 1, and the front conveying component 3, the flipping component 4, and the rear conveying component 5 are sequentially fixedly installed on the upper end of the frame 1.

[0024] The lifting assembly 2 is located directly in front of the lower die of the stamping press. It is used to smoothly lift the inner ring of the wheel hub after stamping from the upper end of the lower die and transfer it laterally to the front conveying assembly 3. The lifting assembly 2 includes a moving mechanism 201, a lifting mechanism 202, and a supporting mechanism 203. The moving mechanism 201 is installed on the lower front side of the frame 1. The lifting mechanism 202 is fixed to the moving end of the moving mechanism 201. The supporting mechanism 203 is fixed to the top of the lifting mechanism 202, and the supporting mechanism 203 is coaxially corresponding to the lower die of the stamping press.

[0025] Please see Figure 4 The moving mechanism 201 includes a moving cavity 401, a lead screw 402, a guide rail 403, a slider 404, a servo motor 405, and a moving base 406. The moving cavity 401 is bolted to the front of the lower end of the frame 1. The guide rail 403 is screwed parallel to the conveying direction of the moving cavity 401. The slider 404 is slidably mounted on the upper end of the guide rail 403. The lead screw 402 is rotatably connected to the middle of the moving cavity 401 via a rotating shaft and is parallel to the guide rail 403. The servo motor 405 is screwed to the rear end of the moving cavity 401, and its output shaft is connected to the lead screw 402 via a coupling. The moving base 406 is screwed to the upper end of the slider 404, thereby achieving linear sliding limit through the cooperation of the guide rail 403 and the slider 404. The lower end of the moving base 406 is threadedly connected to the lead screw 402. The lifting mechanism 202 is mounted on the upper end of the moving base 406, thereby driving the lifting mechanism 202 to move precisely through the moving mechanism 201.

[0026] The lifting mechanism 202 includes a mounting base 501, a first electric telescopic rod 502, and two guide rods 503. The mounting base 501 is fixedly mounted on the upper end of the movable base 406 with screws. The first electric telescopic rod 502 is fitted through the lower middle part of the mounting base 501, with the telescopic portion at the upper end of the first electric telescopic rod 502 vertically upward. The guide rods 503 are vertically slidably connected to both sides of the upper end of the mounting base 501 via sliding sleeves. The bottom of the lifting mechanism 203 is fixedly connected to the telescopic portion at the upper end of the first electric telescopic rod 502 and the top of the guide rods 503. The first electric telescopic rod 502 pushes the lifting mechanism 203 to move up and down, and the guide rods 503 provide vertical guidance for the lifting mechanism 203 to prevent tilting during the lifting process.

[0027] The lifting mechanism 203 includes a lifting plate 601, two lifting frames 602, and a buffer pad 603. The lifting plate 601 is fixedly mounted on the telescopic part of the upper end of the first electric telescopic rod 502 and the top of the guide rod 503. The two lifting frames 602 are symmetrically welded to the upper end of the lifting plate 601 in an L-shape, and the upper ends of the lifting frames 602 extend to both sides of the lower end of the stamping die, used to lift the lower ends of the inner ring of the wheel hub. The buffer pad 603 is bonded to the upper surface of the lifting frame 602. The buffer pad 603 reduces the impact force during lifting, prevents the lifting frame 602 from scratching the inner ring of the wheel hub, and prevents the inner ring of the wheel hub from slipping during lifting.

[0028] The front conveying assembly 3 and the rear conveying assembly 5 are respectively installed on the front and rear sides of the upper end of the frame 1. The front conveying assembly 3 is arranged parallel to the lifting assembly 2. The conveying direction of the front conveying assembly 3 is towards the tilting assembly 4, and it is used to smoothly convey the inner ring of the wheel hub transferred from the lifting assembly 2 to the tilting assembly 4. The rear conveying assembly 5 is connected to the conveying direction of the tilting assembly 4, and it is used to convey the inner ring of the wheel hub after it has been tilted by the tilting assembly 4 to the rear.

[0029] Please see Figure 5 The front conveying assembly 3 and the rear conveying assembly 5 have identical structures, both including a drive motor 301, a synchronous pulley 302, a conveyor pulley 303, a conveyor belt 304, and a tension pulley 305. The drive motor 301 is bolted to the front and rear sides of the upper end of the frame 1, and the output shaft at the side end of the drive motor 301 is keyed to the synchronous pulley 302. The conveyor pulley 303 and the tension pulley 305 are rotatably connected to the outside of the frame 1 by pins. The conveyor belt 304 is driven and sleeved on the outer ends of the conveyor pulley 303 and the tension pulley 305, driving the inner ring of the hub to move and convey. The surface of the conveyor belt 304 is evenly provided with several positioning protrusions (not shown in the figure) arranged along the conveying direction, which are used to axially position the inner ring of the hub during the conveying process and prevent the inner ring of the hub from slipping.

[0030] The flipping assembly 4 is installed at the middle of the upper end of the frame 1, connected to the conveying direction of the front conveying assembly 3. It is used to flip the inner ring of the wheel hub conveyed by the front conveying assembly 3 by 180° and convey it to the rear conveying assembly 5, so that the unprocessed surface of the inner ring of the wheel hub faces upward, adapting to the requirements of subsequent bolt hole chamfering, tapping and other processing procedures. The flipping assembly 4 includes a middle conveying mechanism 6, a guiding mechanism 7 and a flipping mechanism 8. The middle conveying mechanism 6 is installed in the middle of the flipping assembly 4 and is used to convey the inner ring of the wheel hub from the front conveying assembly 3 to the rear. The middle conveying mechanism 6 has the same structural layout as the front conveying assembly 3 and the rear conveying assembly 5. The guiding mechanism 7 is installed on the front side of the flipping assembly 4 and is used to center and guide the inner ring of the wheel hub conveyed by the middle conveying mechanism 6. The flipping mechanism 8 is installed on the rear side of the flipping assembly 4 and is used to flip the inner ring of the wheel hub conveyed by the middle conveying mechanism 6.

[0031] Please see Figure 7The guiding mechanism 7 includes two side plates 801, a second electric telescopic rod 802, a guide platform 803, a guiding motor 804, a transmission wheel 805, a guide wheel 806, and a guide belt 807. The side plates 801 are bolted to both sides of the upper end of the frame 1. The second electric telescopic rod 802 is mounted on the outer side of the side plates 801. The guide platform 803 is slidably connected to the upper end of the side plates 801, and the telescopic portion of the side end of the second electric telescopic rod 802 is fixedly connected to the guide platform 803. The guiding motor 804 is screwed to the side end of the guide platform 803, and the output shaft at the upper end of the guiding motor 804 is keyed to the transmission wheel 805. The guide wheel 806 is rotatably connected to the upper end of the guide platform 803 via a pin, and the guide belt 807 is sleeved on the outer ends of the transmission wheel 805 and the guide wheel 806. A slide rod 808 is welded to the outer wall of the upper end of the frame 1. The slide rod 808 is slidably connected to the lower end of the guide table 803 through a sliding sleeve, thereby limiting the horizontal sliding of the guide table 803 through the slide rod 808.

[0032] Please see Figure 6 The flipping mechanism 8 includes a motor bracket 901, a flipping motor 902, a pulley set 903, a flipping shaft 904, and a flipping disc 905. The motor bracket 901 is mounted on the upper end of the frame 1 with screws. The flipping motor 902 is mounted on the outer side of the motor bracket 901 with screws. The output shaft on the inner side of the flipping motor 902 is connected to the pulley set 903, and the pulley set 903 is connected to the flipping shaft 904. The flipping shaft 904 is rotatably connected to the middle of the upper end of the frame 1 via bearings. The flipping disc 905 is connected to the outer curved surfaces on both sides of the flipping shaft 904 via keys. The outer end of the flipping disc 905 has a flipping groove 906 that matches the outer end of the inner ring of the hub. Several flipping grooves 906 are provided and symmetrically distributed along the outer end of the flipping disc 905.

[0033] The specific working process of this invention is as follows: Step 1: Stamping process: Place the inner ring blank of the wheel hub on the upper end of the lower die of the stamping machine, start the stamping machine, and the stamping drive mechanism drives the upper die to move downward to complete the stamping and forming of the bolt holes of the inner ring of the wheel hub; after the stamping is completed, the stamping drive mechanism drives the upper die to move upward and reset.

[0034] Step 2: Lifting and Transfer Process: After the inner ring of the wheel hub is punched, immediately extend the first electric telescopic rod 502 of the lifting mechanism 202, thereby driving the lifting mechanism 203 to lift upward. When the lifting mechanism 203 lifts, the buffer pad 603 at the upper end of the lifting frame 602 fits against the lower sides of the inner ring of the wheel hub, smoothly lifting the inner ring of the wheel hub from the upper end of the lower mold. Then, start the servo motor 405 of the moving mechanism 201. The servo motor 405 drives the lead screw 402 to rotate. Through the thread force of the lead screw 402, the moving seat 406 moves backward in a straight line along the upper end of the guide rail 403, moving the lifting mechanism 203 and the inner ring of the wheel hub directly above the front conveying component 3. Next, control the lifting mechanism 202 to move downward, driving the lifting mechanism 203 to place the inner ring of the wheel hub smoothly on the upper end of the front conveying component 3. Finally, the moving mechanism 201 and the lifting mechanism 202 are reset, ready for the next lifting operation.

[0035] Step 3: Conveying and Guiding Process: The drive motor 301 of the front conveying component 3 is started, driving the synchronous pulley 302 to cooperate with the conveying wheel 303 to drive the conveyor belt 304 to rotate and convey, thereby driving the inner ring of the hub to be conveyed backward. When the inner ring of the hub is conveyed backward, the second electric telescopic rod 802 is controlled to extend inward synchronously, driving the guide table 803 to move inward along the slide rod 808, thereby driving the guide belt 807 to move inward synchronously; at the same time, the guide motor 804 is started, driving the transmission wheel 805 to cooperate with the guide wheel 806 to drive the guide belt 807 to rotate and convey. The guide belt 807 moving inward guides the inner ring of the hub to be centered, ensuring that the inner ring of the hub is smoothly and centrally conveyed towards the flipping component 4.

[0036] Step 4: Tilting process: When the inner ring of the wheel hub is conveyed towards the tilting assembly 4, it moves to the tilting disc 905 and is embedded in the tilting groove 906. After the inner ring of the wheel hub is in place, the tilting motor 902 is started, which drives the pulley group 903 to rotate. The pulley group 903 drives the tilting shaft 904 to rotate, and the tilting shaft 904 drives the tilting disc 905 to rotate, thereby causing the inner ring of the wheel hub inside the tilting groove 906 to rotate 180°. After the tilting is completed, the tilted inner ring of the wheel hub is conveyed to the rear conveying assembly 5, realizing the continuous operation of lifting, conveying and tilting the inner ring of the wheel hub after the bolt holes are punched.

[0037] In this embodiment, compared with the existing processing mode of manual part handling and individual flipping, the flipping device significantly improves production efficiency, greatly reduces product damage rate, significantly reduces labor intensity, and significantly improves production safety, making it fully adaptable to the production needs of large-scale, high-precision wheel hub inner rings.

[0038] Compared with the prior art, the present invention has the following significant advantages: This invention achieves lifting, precise conveying, and stable flipping of the inner ring of the wheel hub after extrusion through the coordinated operation of the lifting component, conveying component, and flipping component. It eliminates the need for manual handling of parts, transfer, and guiding operations, effectively solving the problems of high labor intensity, low efficiency, and safety hazards associated with manual parts handling.

[0039] The lifting mechanism 202 is driven by the first electric telescopic rod 502, and works with the guide rod 503 to ensure that the lifting mechanism 203 is lifted smoothly without tilting. The lifting mechanism 203 adopts an L-shaped lifting frame 602 design, and works with the buffer pad 603 to avoid contact with the outer surface of the inner ring of the wheel hub and the bolt holes. This not only alleviates the lifting impact force, but also effectively avoids problems such as product deformation, surface scratches and bolt hole burrs falling off, thus improving the product processing quality.

[0040] The conveying assembly uses a non-slip 304 conveyor belt, along with positioning protrusions and a guide mechanism 7, to stably convey and precisely guide the inner ring of the wheel hub, preventing deviation, tilting, and slippage during conveying. The synchronized operating rhythm of each component ensures smooth transitions between processes, improving production continuity. The tilting assembly uses a tilting disc 905 with a tilting groove 906 to achieve a precise 180° tilt of the inner ring of the wheel hub. After tilting, the bolt hole positions of the inner ring are precisely aligned with subsequent processing stations, effectively ensuring the accuracy of subsequent processing.

[0041] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A device for flipping punched bolt holes, characterized in that, include: Frame, lifting assembly, front conveyor assembly, tilting assembly, and rear conveyor assembly; The lifting assembly is located directly in front of the lower die of the stamping press and is used to smoothly lift the inner ring of the wheel hub after stamping from the upper end of the lower die and transfer it laterally to the front conveying assembly. The lifting assembly includes a moving mechanism, a lifting mechanism and a supporting mechanism. The moving mechanism is installed on the front side of the lower end of the frame. The lifting mechanism is fixed to the moving end of the moving mechanism. The supporting mechanism is fixed to the top of the lifting mechanism and is coaxial with the lower die of the stamping press. The flipping component is located at the middle of the upper end of the frame and is connected to the conveying direction of the front conveying component. It is used to flip the inner ring of the wheel hub conveyed by the front conveying component and convey it to the rear conveying component. The flipping component includes a middle conveying mechanism, a guiding mechanism and a flipping mechanism.

2. The device for flipping the punched bolt hole according to claim 1, characterized in that, The moving mechanism includes a moving cavity, a lead screw, a guide rail, a slider, a servo motor, and a moving base. The moving cavity is located at the front of the lower end of the frame. The guide rail is installed parallel to the conveying direction of the moving cavity. The slider is slidably mounted on the upper end of the guide rail. The lead screw is rotatably connected to the middle of the moving cavity. The servo motor is located at the rear end of the moving cavity, and its output shaft is connected to the lead screw. The moving base is located on the upper end of the slider, and its lower end is threadedly connected to the lead screw. The lifting mechanism is installed on the upper end of the moving base and is used to drive the lifting mechanism to move.

3. The device for flipping the punched bolt hole according to claim 1, characterized in that, The lifting mechanism includes a mounting base, a first electric telescopic rod, and two guide rods. The mounting base is fixedly mounted on the upper end of the movable seat. The first electric telescopic rod is located in the middle of the lower end of the mounting base. The guide rods are slidably connected to both sides of the upper end of the mounting base. The bottom of the lifting mechanism is connected to the telescopic part of the upper end of the first electric telescopic rod and the top of the guide rods, and is used to push the lifting mechanism to move up and down.

4. The device for flipping the punched bolt hole according to claim 1, characterized in that, The lifting mechanism includes a lifting plate, two lifting frames, and a buffer pad. The lifting plate is located on the upper telescopic part of the first electric telescopic rod and the top of the guide rod. The two lifting frames are symmetrically arranged in an L-shape on the upper part of the lifting plate. The upper ends of the lifting frames extend to both sides of the lower end of the stamping machine's lower die, and are used to lift both sides of the lower end of the inner ring of the wheel hub. The buffer pad is located on the upper end of the lifting frame.

5. The device for flipping the punched bolt hole according to claim 1, characterized in that, The front conveying assembly and the rear conveying assembly are respectively installed on the front and rear sides of the upper end of the frame. The front conveying assembly is arranged parallel to the lifting assembly. The conveying direction of the front conveying assembly is towards the flipping assembly, and it is used to smoothly convey the inner ring of the wheel hub transferred by the lifting assembly to the flipping assembly. The rear conveying assembly is connected to the conveying direction of the flipping assembly, and it is used to convey the inner ring of the wheel hub after it has been flipped by the flipping assembly to the rear.

6. The device for flipping the punched bolt hole according to claim 1, characterized in that, The front conveying assembly and the rear conveying assembly each include a drive motor, a synchronous pulley, a conveyor wheel, a conveyor belt, and a tensioning pulley. The drive motor is located on the front and rear sides of the upper end of the frame. The output shaft of the drive motor is connected to the synchronous pulley. The conveyor wheel and the tensioning pulley are rotatably connected to the outside of the frame. The conveyor belt is driven to the outer ends of the conveyor wheel and the tensioning pulley, and is used to drive the inner ring of the hub to move and convey.

7. The device for flipping punched bolt holes according to claim 6, characterized in that, The surface of the conveyor belt is uniformly provided with several positioning protrusions arranged along the conveying direction, which are used to axially position the inner ring of the hub during the conveying process.

8. The device for flipping the punched bolt hole according to claim 1, characterized in that, The middle conveying mechanism is installed in the middle of the flipping assembly and is used to convey the inner ring of the wheel hub from the front conveying assembly to the rear. The middle conveying mechanism has the same structural layout as the front conveying assembly and the rear conveying assembly. The guiding mechanism is installed on the front side of the flipping assembly and is used to guide the inner ring of the wheel hub conveyed by the middle conveying mechanism to the center. The flipping mechanism is installed on the rear side of the flipping assembly and is used to flip the inner ring of the wheel hub conveyed by the middle conveying mechanism.

9. The device for flipping the punched bolt hole according to claim 1, characterized in that, The guiding mechanism includes two side plates, a second electric telescopic rod, a guide platform, a guide motor, a transmission wheel, a guide wheel, and a guide belt. The side plates are located on both sides of the upper end of the frame. The second electric telescopic rod is mounted on the outer side of the side plates. The guide platform is slidably connected to the upper end of the side plates, and the telescopic portion of the side end of the second electric telescopic rod is connected to the guide platform. The guide motor is located at the side end of the guide platform, and the upper output shaft of the guide motor is connected to the transmission wheel. The guide wheel is rotatably connected to the upper end of the guide platform. The guide belt is drively connected to the outer ends of the transmission wheel and the guide wheel. A sliding rod is provided on the outer wall of the upper end of the frame, and the sliding rod is slidably connected to the lower end of the guide platform for horizontal sliding limit of the guide platform.

10. The device for flipping the punched bolt hole according to claim 1, characterized in that, The flipping mechanism includes a motor bracket, a flipping motor, a pulley assembly, a flipping shaft, and a flipping disc. The motor bracket is located on the upper side of the frame, and the flipping motor is located on the outer side of the motor bracket. The inner output shaft of the flipping motor is connected to the pulley assembly for transmission, and the pulley assembly is connected to the flipping shaft for transmission. The flipping shaft is rotatably connected to the middle of the upper end of the frame. The flipping disc is connected to the outer curved surfaces on both sides of the flipping shaft. The outer end of the flipping disc has a flipping groove that matches the outer end of the inner ring of the hub, and there are several flipping grooves, which are symmetrically distributed sequentially around the outer end of the flipping disc.

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