An automatic polishing and removing device for flash burrs of an automobile aluminum alloy die casting

Abstract

This invention discloses an automatic grinding and burr removal device for die-cast aluminum alloy parts for automobiles, belonging to the technical field of grinding equipment. The device includes a frame, a support frame, a clamping and rotating mechanism, a grinding and burr removal mechanism, a transmission mechanism, and a lifting mechanism. The lifting mechanism, linked to the transmission mechanism, drives the clamping and rotating mechanism to automatically clamp the workpiece and synchronously raise and lower the grinding and burr removal mechanism. A geared motor achieves differential operation via multi-stage transmission wheels, causing the clamping and rotating mechanism to drive the workpiece to rotate at low speed. The cutting tool on the grinding and burr removal mechanism cuts off the outer contour burrs at high speed, while the grinding discs simultaneously perform elastic grinding on the parting surface burrs. An electric push rod can adjust the processing position to adapt to workpieces of different specifications. This device integrates cutting and grinding processes, requiring only one clamping of the workpiece, eliminating the need for transfer and secondary positioning processes, effectively improving processing efficiency and product accuracy, and reducing production and labor costs. It is suitable for mass production of aluminum alloy motor end caps.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to an automatic grinding and removal device for burrs and flash on automotive aluminum alloy die-cast parts. Background Technology

[0002] Automotive motor end caps are mostly made of aluminum alloy through die casting. Due to factors such as the mold closing gap, die casting pressure, and the flow characteristics of molten metal, the workpiece is prone to flash and burrs at the maximum outer contour and parting surface. If these are not cleaned, they will directly affect the subsequent assembly accuracy and motor performance. Therefore, the end caps must be deburred and de-flaked after die casting.

[0003] The current standard processing procedure is as follows: First, the aluminum alloy motor end cover is fixed on a special fixture. Then, the cutting equipment drives the tool to make a circular cutting motion along the maximum outer contour of the end cover to remove the burrs at the outer contour. Because aluminum alloy is relatively soft and has good plasticity, after the burrs on the outer contour are removed, a large number of small burrs will still remain at the edge of the parting surface of the end cover. These minor defects cannot be removed by the cutting process and will not meet the product appearance and assembly standards.

[0004] To remove residual burrs from the parting surface, the existing process requires disassembling the machined end cap from the fixture and transferring it to a separate grinding station for re-clamping and grinding. This separate-station processing mode involves multiple auxiliary processes such as disassembly, transfer, and re-clamping, significantly lengthening the processing time per piece, resulting in low overall production efficiency and making it unsuitable for large-scale industrial production. Furthermore, repeated disassembly and reassembly of the workpiece can cause misalignment of the positioning reference, leading to uneven grinding, dimensional deviations, and other problems, increasing the probability of defective products and resulting in high overall processing costs. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide an automatic grinding and removal device for burrs and flash on automotive aluminum alloy die-cast parts, so as to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic grinding and removal device for burrs and flash on automotive aluminum alloy die-cast parts, comprising a frame, a support frame, and a clamping and rotating mechanism for clamping and driving the workpiece to rotate. The clamping and rotating mechanism includes a placement frame, a telescopic drive rod, a toothed plate, a support, a clamping arm, a gear, a first spring frame, and a first hexagonal transmission cylinder. The placement frame is arranged vertically, the telescopic drive rod is coaxially and movably inserted inside the placement frame, the toothed plate is fixed to the upper end of the telescopic drive rod, the support is fixed to the outer side of the top of the placement frame, the gear is rotatably mounted on the support and meshes with the toothed plate for transmission, the clamping arm is fixedly connected to the gear, the first spring frame is assembled between the telescopic drive rod and the placement frame, and the first hexagonal transmission cylinder is axially movable and radially limited at the bottom end of the telescopic drive rod and is in transmission cooperation with the reduction motor. The placement frame has a cylindrical structure, and an integral support plate structure for supporting the parting surface of the workpiece is formed on the outside of the placement frame. The clamping arms are provided in multiple sets and are evenly distributed along the circumference of the placement frame. The first spring frame is an elastic element structure used to provide elastic preload for the clamping arm to clamp the workpiece; The removal and grinding mechanism simultaneously completes the removal of flash and the grinding of burrs. The removal and grinding mechanism includes a rotating column, a tool holder, a cutting tool, a connecting frame, an elastic mounting frame, a second spring frame, a grinding disc, and a second hexagonal transmission cylinder. The rotating column is movably sleeved on the outside of the second hexagonal transmission cylinder, the tool holder is fixed on the top of the rotating column, the cutting tool is installed on the end of the tool holder, the connecting frame is fixed on the side wall of the rotating column, the elastic mounting frame is elastically connected to the connecting frame through the second spring frame, the grinding disc is fixed on the top of the elastic mounting frame, and the side of the second hexagonal transmission cylinder is connected to the output end of the electric push rod. The grinding disc forms an elastic floating structure through the second spring frame, and the grinding disc elastically presses against the parting surface of the workpiece; A transmission mechanism that realizes the linkage between power transmission and stroke includes a first connecting rod, a second connecting rod, an axial lifting cylinder, a first transmission wheel, a second transmission wheel, and a third transmission wheel; The first and second connecting rods are hinged to form a connecting rod assembly. One end of the connecting rod assembly is connected to the lifting mechanism, and the other end is respectively connected to the telescopic drive rod and the rotating column. The axial lifting cylinder is fitted at the movement path of the connecting rod assembly. The first transmission wheel is fixed to the bottom of the first hexagonal transmission cylinder and connected to the output end of the reduction motor. The second transmission wheel is rotatably assembled at the hinge position of the first and second connecting rods. The third transmission wheel is fixed to the bottom of the second hexagonal transmission cylinder. The first transmission wheel and the second transmission wheel, as well as the second transmission wheel and the third transmission wheel, are all connected by transmission belts. The parallelogram linkage structure is composed of two sets of first connecting rods and two sets of second connecting rods, which is used to drive the removal and grinding mechanism to translate and adapt to workpieces of different specifications. The diameters of the first, second, and third transmission wheels decrease sequentially. A lifting mechanism that drives the overall lifting action, the lifting mechanism includes a fixed frame, a lead screw, a sliding fork and a stepper motor; The fixed frame is fixed on the support frame, the lead screw is vertically rotatably installed inside the fixed frame, the stepper motor is fixed at the bottom of the fixed frame and its output shaft is connected to the bottom end of the lead screw, the sliding fork is threaded onto the lead screw, and the sliding fork abuts and cooperates with the connecting rod assembly of the transmission mechanism. A geared motor that provides rotational power and an electric push rod that adjusts the machining spacing; The support frame is fixedly installed on the machine frame. The clamping and rotating mechanism, the removal and polishing mechanism, and the lifting mechanism are all assembled inside the support frame. The transmission mechanism is connected to the clamping and rotating mechanism, the removal and polishing mechanism, and the lifting mechanism respectively. The geared motor is fixed inside the machine frame and provides rotational power to the clamping and rotating mechanism and the removal and polishing mechanism. The electric push rod is connected to the removal and polishing mechanism to adjust their relative positions.

[0007] In summary, the present invention has the following main beneficial effects: 1. This invention integrates flash cutting and burr removal with a clamping and rotating mechanism and a deburring and polishing mechanism. Through the coordinated operation of a lifting mechanism and a transmission mechanism, flash removal and burr removal on the outer contour of the end cap and parting surface can be completed simultaneously at the same workstation. Once the workpiece is clamped and fixed by the clamping and rotating mechanism, it requires no disassembly, transfer, or repeated positioning. The lifting mechanism drives the overall lifting, and the transmission mechanism transmits power. The clamping and rotating mechanism drives the workpiece to rotate at low speed, while the cutting tool on the deburring and polishing mechanism rotates at high speed to remove flash. Simultaneously, the polishing disc polishes the burrs on the parting surface. The entire process is seamlessly connected, significantly reducing auxiliary time such as transfer and secondary clamping, greatly improving processing efficiency, and making it suitable for large-scale automated continuous production. 2. Throughout the entire process, the clamping and rotating mechanism maintains a fixed posture and a unified positioning benchmark, avoiding positioning offset problems caused by multiple disassembly and reassembly and workstation transfers. This effectively improves defects such as uneven grinding and dimensional deviations, enhancing processing accuracy and product qualification rate. The device achieves differentiated speed transmission through the cooperation of the first, second, and third transmission wheels, and flexibly adjusts the processing spacing with the electric push rod, adapting to motor end caps of different specifications. The integrated structure reduces the space occupied by multiple independent devices, simplifies production line layout, and reduces manual operation intensity and equipment investment costs, resulting in lower overall operating costs. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram showing the assembly state of the clamping rotation mechanism and the lifting mechanism of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point A; Figure 5 It is a schematic structural diagram of the deburring and grinding mechanism removed from the present invention; Figure 6 It is a schematic structural diagram of the transmission mechanism of the present invention.

[0009] In the figure: 1. Frame; 2. Support frame; 3. Clamping and rotating mechanism; 301. Placing rack; 302. Telescopic drive rod; 303. Tooth plate; 304. Support; 305. Clamping arm; 306. Gear; 307. First spring frame; 308. First hexagonal transmission cylinder; 4. Deburring and grinding mechanism; 401. Rotating column; 402. Tool handle; 403. Cutting tool; 404. Connecting frame; 405. Elastic mounting frame; 406. Second spring frame; 407. Grinding disc; 408. Second hexagonal transmission cylinder; 5. Transmission mechanism; 501. First connecting rod; 502. Second connecting rod; 503. Axial lifting cylinder; 504. First transmission wheel; 505. Second transmission wheel; 506. Third transmission wheel; 6. Lifting mechanism; 601. Fixed frame; 602. Screw rod; 603. Sliding fork; 604. Stepper motor; 7. Reduction motor; 8. Electric push rod. Specific embodiments

[0010] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0011] Next, the embodiments of the present invention will be described according to the overall structure of the present invention.

[0012] Embodiment 1 As Figure 1-6 shown, the present invention is an automatic deburring and grinding device for automotive aluminum alloy die-castings, which is integrally composed of a frame 1, a support frame 2, a clamping and rotating mechanism 3, a deburring and grinding mechanism 4, a transmission mechanism 5, a lifting mechanism 6, a reduction motor 7, and an electric push rod 8. The support frame 2 is fixedly installed on the frame 1, and the clamping and rotating mechanism 3, the deburring and grinding mechanism 4, and the lifting mechanism 6 are all assembled in the inner area of the support frame 2; the transmission mechanism 5 is respectively in transmission connection with the clamping and rotating mechanism 3, the deburring and grinding mechanism 4, and the lifting mechanism 6 to achieve action linkage and power transmission; the reduction motor 7 is fixedly installed inside the frame 1 to provide rotational power for the clamping and rotating mechanism 3 and the deburring and grinding mechanism 4; the electric push rod 8 is connected to the deburring and grinding mechanism 4 to adjust the relative working position of the deburring and grinding mechanism 4.

[0013] The clamping and rotating mechanism 3 includes a placement frame 301, a telescopic drive rod 302, a toothed plate 303, a support 304, a clamping arm 305, a gear 306, a first spring frame 307, and a first hexagonal transmission cylinder 308. The placement frame 301 is arranged vertically and has an overall cylindrical structure. A support plate structure is integrally formed on the outer side of the placement frame 301, which is used to support the parting surface of the automotive aluminum alloy motor end cover. The telescopic drive rod 302 is coaxially and movably inserted inside the placement frame 301 and can slide up and down axially. The toothed plate 303 is fixedly installed at the upper end of the telescopic drive rod 302. The support 304 is fixed on the top outer side of the placement frame 301. The gear 306 is rotatably mounted on the support 304, and the gear 306 meshes with the toothed plate 303 for transmission. Clamping arms 305 are fixedly connected to gears 306. Multiple clamping arms 305 are provided and evenly distributed along the circumference of the placement frame 301. A first spring frame 307 is assembled between the telescopic drive rod 302 and the placement frame 301, and provides elastic preload for the clamping arms 305 to clamp the workpiece by relying on its own elasticity. A first hexagonal transmission cylinder 308 is installed at the bottom end of the telescopic drive rod 302. The first hexagonal transmission cylinder 308 can move axially and be radially limited relative to the telescopic drive rod 302. At the same time, the first hexagonal transmission cylinder 308 forms a transmission cooperation with the reduction motor 7.

[0014] The deburring and polishing mechanism 4 includes a rotating column 401, a tool holder 402, a cutting tool 403, a connecting frame 404, an elastic mounting frame 405, a second spring frame 406, a polishing disc 407, and a second hexagonal transmission cylinder 408. The rotating column 401 is movably sleeved on the outside of the second hexagonal transmission cylinder 408 and can move axially along the second hexagonal transmission cylinder 408. The tool holder 402 is fixed to the top of the rotating column 401, and the cutting tool 403 is installed at the end of the tool holder 402 for removing burrs from the outer contour of the workpiece. The connecting frame 404 is fixed to the side wall of the rotating column 401. The elastic mounting frame 405 is elastically connected to the connecting frame 404 through the second spring frame 406. The polishing disc 407 is fixedly installed on the top of the elastic mounting frame 405. The polishing disc 407 forms an elastic floating structure with the help of the second spring frame 406, and can elastically press against the parting surface of the workpiece during operation to complete the burr polishing operation. The side of the second hexagonal transmission cylinder 408 is connected to the output end of the electric push rod 8, and the electric push rod 8 drives the second hexagonal transmission cylinder 408 and the overall removal and grinding mechanism 4 to adjust their positions.

[0015] The transmission mechanism 5 consists of a first connecting rod 501, a second connecting rod 502, an axial lifting cylinder 503, a first transmission wheel 504, a second transmission wheel 505, and a third transmission wheel 506. The first connecting rod 501 and the second connecting rod 502 are hinged together to form a connecting rod assembly. This device has two sets of these connecting rod assemblies, which together form a parallelogram connecting rod structure. One end of the connecting rod assembly cooperates with the lifting mechanism 6, and the other end is respectively connected to the telescopic drive rod 302 and the rotating column 401. The axial lifting cylinder 503 is correspondingly positioned on the movement path of the connecting rod assembly. The first transmission wheel 504 is fixed to the bottom of the first hexagonal transmission cylinder 308, and is also fixedly connected to the output end of the reduction motor 7. The second transmission wheel 505 is rotatably mounted at the hinge position of the first connecting rod 501 and the second connecting rod 502, and the third transmission wheel 506 is fixedly installed at the bottom of the second hexagonal transmission cylinder 408. The diameters of the first transmission wheel 504, the second transmission wheel 505, and the third transmission wheel 506 decrease sequentially. Power is transmitted between the first transmission wheel 504 and the second transmission wheel 505, and between the second transmission wheel 505 and the third transmission wheel 506, via transmission belts. The parallelogram linkage structure allows the grinding mechanism 4 to move as a whole, thus adapting to motor end caps of different specifications without obstructing power transmission between mechanisms.

[0016] The lifting mechanism 6 includes a fixed frame 601, a lead screw 602, a sliding fork 603, and a stepper motor 604. The fixed frame 601 is fixedly mounted on the support frame 2. The lead screw 602 is rotatably mounted inside the fixed frame 601 in a vertical direction. The stepper motor 604 is fixed to the bottom of the fixed frame 601, and its output shaft is connected to the bottom end of the lead screw 602 to drive the lead screw 602 to rotate in both directions. The sliding fork 603 is threaded onto the lead screw 602. When the lead screw 602 rotates, it drives the sliding fork 603 to reciprocate vertically. The sliding fork 603 engages with the linkage assembly of the transmission mechanism 5, thereby driving the entire linkage assembly to complete the linkage action.

[0017] The working principle of this invention is as follows: When in use, the three sets of clamping arms 305 of the clamping and rotating mechanism 3 in this device are in a vertical state, so that the operator can place the end cap horizontally on the surface of the placement frame 301 with its parting surface facing down. The placement frame 301 is a cylindrical structure that can pass through the central hole of the end cap. At the same time, an integrally formed support plate structure located below the parting surface of the end cap is fixed on the outside of the placement frame 301. At this time, the lifting mechanism 6 is activated. The lifting mechanism 6 drives the lead screw 602 to rotate through the stepper motor 604. As a result, the lead screw 602 drives the sliding fork 603 to rise to a certain extent. During the rise of the sliding fork 603, the first link 501 and the second link 502 of the transmission mechanism 5 drive the telescopic drive rod 302 to rise axially relative to the placement frame 301. When the telescopic drive rod 302 rises axially inside the placement frame 301, the multiple sets of toothed plates 303 fixed at its end will mesh with the gear 306, thereby driving the multiple sets of clamping arms 305 to complete the flipping, so that the multiple sets of clamping arms 305 complete the pressing and fixing effect on the upper surface of the end cover. At the same time, when the first link 501 and the second link 502 rise, the other two sets of first links 501 and second links 502 will drive the rotating column 401 of the removal grinding mechanism 4 to rise axially along the second hexagonal transmission cylinder 408. Thus, the rise of the rotating column 401 will drive the cutting tool 403 to rise through the tool holder 402, thereby enabling the cutting tool 403 to remove the end cap burrs after it starts to rotate. At the same time, the rotating column 401 will drive the grinding disc 407 to rise synchronously with the cutting tool 403 through the connecting frame 404 and the elastic mounting frame 405. The grinding disc 407 is fixedly installed on the top of the elastic mounting frame 405, and the elastic mounting frame 405 and the connecting frame 404 are elastically connected by the second spring frame 406. That is to say, as the grinding mechanism 4 rises as a whole, the cutting tool 403 can not only remove the burrs on the end cap, but also perform synchronous grinding operations by pressing the grinding disc 407 on the bottom part of the end cap. Furthermore, a first spring frame 307 is provided between the telescopic drive rod 302 and the placement frame 301, so as to ensure that after the telescopic drive rod 302 rises, the whole is also elastic to achieve the clamping and fixing effect of multiple clamping arms 305 on the end cap. Furthermore, a geared motor 7 is installed inside the frame 1. The output end of the geared motor 7 is fixedly connected to the central shaft of the first transmission wheel 504, and the first transmission wheel 504 is fixed to the bottom of the first hexagonal transmission cylinder 308. Thus, the first hexagonal transmission cylinder 308 can drive the clamping and rotating mechanism 3 to rotate as a whole. Meanwhile, the central shaft of the second transmission wheel 505 passes through the hinge between the first connecting rod 501 and the second connecting rod 502 and is movably connected by a bearing, while the central shaft of the third transmission wheel 506 is fixed to the bottom of the second hexagonal transmission cylinder 408. The first transmission wheel 504 and the second transmission wheel 505, as well as the second transmission wheel 505 and the third transmission wheel 506, are all connected by a transmission belt. In other words, the parallelogram linkage structure formed by the two sets of first linkage 501 and second linkage 502 allows the overall distance between the removal and polishing mechanism 4 and the clamping and rotating mechanism 3 to be adjusted to accommodate end caps of different sizes, while not affecting the transmission between the clamping and rotating mechanism 3 and the removal and polishing mechanism 4. Specifically, the output end of the electric push rod 8 is connected to the side of the second hexagonal transmission cylinder 408, so that the extension and retraction of the electric push rod 8 can drive the adjustment of the distance between the removal and grinding mechanism 4 and the clamping and rotating mechanism 3. Furthermore, the diameters of the first transmission wheel 504, the second transmission wheel 505, and the third transmission wheel 506 decrease sequentially. This means that the rotational speed of the first transmission wheel 504 is much lower than that of the third transmission wheel 506. Consequently, the high-speed third transmission wheel 506 can drive the cutting tool 403 to rotate at high speed, while the low-speed first transmission wheel 504 can drive the clamping rotation mechanism 3 to rotate slowly. Thus, under the high-speed cutting action of the cutting tool 403, the clamping rotation mechanism 3 can drive the end cap to rotate. Meanwhile, in conjunction with the synchronous extension and retraction function of the electric push rod 8, the cutting tool 403 can automatically adapt to the maximum outer contour of the end cap, thereby completing the end cap burr removal operation. At the same time, the grinding disc 407 can complete the synchronous parting surface burr grinding operation, resulting in a good overall performance.

[0018] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An automatic grinding and burr removal device for die-cast aluminum alloy parts for automobiles, characterized in that: It includes a frame (1), a support frame (2), a clamping and rotating mechanism (3) for clamping and driving the workpiece to rotate, a deburring and grinding mechanism (4) for simultaneously completing the removal of burrs and grinding, a transmission mechanism (5) for realizing the linkage of power transmission and stroke, a lifting mechanism (6) for driving the overall lifting action of the mechanism, a geared motor (7) for providing rotational power, and an electric push rod (8) for adjusting the processing distance. The support frame (2) is fixedly installed on the frame (1). The clamping and rotating mechanism (3), the removal and polishing mechanism (4), and the lifting mechanism (6) are all assembled inside the support frame (2). The transmission mechanism (5) is connected to the clamping and rotating mechanism (3), the removal and polishing mechanism (4), and the lifting mechanism (6) respectively. The reduction motor (7) is fixed inside the frame (1) and provides rotational power to the clamping and rotating mechanism (3) and the removal and polishing mechanism (4). The electric push rod (8) is connected to the removal and polishing mechanism (4) to adjust their relative positions.

2. The automatic burr polishing and removing device for the flash of the automobile aluminum alloy die casting, according to claim 1, characterized in that: The clamping and rotating mechanism (3) includes a placement frame (301), a telescopic drive rod (302), a toothed plate (303), a support (304), a clamping arm (305), a gear (306), a first spring frame (307), and a first hexagonal transmission cylinder (308). The placement rack (301) is arranged vertically. The telescopic drive rod (302) is coaxially and movably inserted inside the placement rack (301). The toothed plate (303) is fixed on the upper end of the telescopic drive rod (302). The support (304) is fixed on the outer side of the top of the placement rack (301). The gear (306) is rotatably mounted on the support (304) and meshes with the toothed plate (303) for transmission. The clamping arm (305) is fixedly connected to the gear (306). The first spring frame (307) is assembled between the telescopic drive rod (302) and the placement rack (301). The first hexagonal transmission cylinder (308) is axially movable and radially limited at the bottom end of the telescopic drive rod (302) and is in transmission cooperation with the reduction motor (7).

3. The automatic burr polishing and removing device for the flash of the automobile aluminum alloy die casting, according to claim 2, characterized in that: The placement frame (301) is a cylindrical structure. The outer side of the placement frame (301) is integrally formed with a support plate structure for supporting the parting surface of the workpiece. The clamping arms (305) are provided in multiple sets and are evenly distributed along the circumference of the placement frame (301).

4. The automatic burr polishing and removing device for the automobile aluminum alloy die casting flash according to claim 1, characterized in that: The removal and polishing mechanism (4) includes a rotating column (401), a tool holder (402), a cutting tool (403), a connecting frame (404), an elastic mounting frame (405), a second spring frame (406), a polishing disc (407), and a second hexagonal transmission cylinder (408). The rotating column (401) is movably sleeved on the outside of the second hexagonal transmission cylinder (408). The tool holder (402) is fixed on the top of the rotating column (401). The cutting tool (403) is installed on the end of the tool holder (402). The connecting frame (404) is fixed on the side wall of the rotating column (401). The elastic mounting frame (405) is elastically connected to the connecting frame (404) through the second spring frame (406). The grinding disc (407) is fixed on the top of the elastic mounting frame (405). The side of the second hexagonal transmission cylinder (408) is connected to the output end of the electric push rod (8).

5. The automatic burr polishing and removing device for the automobile aluminum alloy die casting flash according to claim 1, characterized in that: The transmission mechanism (5) includes a first connecting rod (501), a second connecting rod (502), an axial lifting cylinder (503), a first transmission wheel (504), a second transmission wheel (505), and a third transmission wheel (506). The first connecting rod (501) and the second connecting rod (502) are hinged to form a connecting rod assembly. One end of the connecting rod assembly is connected to the lifting mechanism (6), and the other end is respectively connected to the telescopic drive rod (302) and the rotating column (401). The axial lifting cylinder (503) is fitted at the movement path of the connecting rod assembly. The first transmission wheel (504) is fixed at the bottom of the first hexagonal transmission cylinder (308) and connected to the output end of the reduction motor (7). The second transmission wheel (505) is rotatably assembled at the hinge position of the first connecting rod (501) and the second connecting rod (502). The third transmission wheel (506) is fixed at the bottom of the second hexagonal transmission cylinder (408). The first transmission wheel (504) and the second transmission wheel (505), and the second transmission wheel (505) and the third transmission wheel (506) are all connected by transmission belts.

6. The automatic burr polishing and removing device for the flash of the automobile aluminum alloy die casting, according to claim 5, characterized in that: The diameters of the first transmission wheel (504), the second transmission wheel (505), and the third transmission wheel (506) decrease sequentially.

7. The automatic flash and burr polishing and removing device for automobile aluminum alloy die castings of claim 1, characterized in that: The lifting mechanism (6) includes a fixed frame (601), a lead screw (602), a sliding fork (603), and a stepper motor (604). The fixed frame (601) is fixed on the support frame (2), the lead screw (602) is vertically rotatably installed inside the fixed frame (601), the stepper motor (604) is fixed at the bottom of the fixed frame (601) and its output shaft is connected to the bottom end of the lead screw (602), the sliding fork (603) is threaded onto the lead screw (602), and the sliding fork (603) abuts against the connecting rod assembly of the transmission mechanism (5).

8. The automatic burr polishing and removing device for the flash of the automobile aluminum alloy die casting, according to claim 4, characterized in that: The grinding disc (407) forms an elastic floating structure through the second spring frame (406), and the grinding disc (407) elastically presses against the parting surface of the workpiece.

9. The automatic flash and burr polishing and removing device for automobile aluminum alloy die castings of claim 2, characterized in that: The first spring frame (307) is an elastic element structure used to provide elastic preload for the clamping arm (305) to clamp the workpiece.

10. The automatic flash and burr polishing and removing device for automobile aluminum alloy die castings according to claim 5, characterized in that: The parallelogram linkage structure is formed by two sets of first connecting rods (501) and two sets of second connecting rods (502), which is used to drive the removal and grinding mechanism (4) to translate and adapt to workpieces of different specifications.

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