Polishing and fine trimming platform for large reverse aluminum profile extrusion die and using method of polishing and fine trimming platform

Abstract

The invention relates to the technical field of mold polishing, in particular to a polishing and fine trimming platform for a large reverse aluminum profile extrusion mold and a using method thereof.The polishing and fine trimming platform comprises a polishing platform, dust collection equipment, a clamp locking mechanism and a polisher are fixed to the inner side of the polishing platform, and a hollowed-out plate is fixed between the dust collection equipment and the clamp locking mechanism and between the dust collection equipment and the polisher; an auxiliary grinding device is fixed to the side, away from the dust collection equipment, of the hollowed-out plate and comprises an electric telescopic rod, the top end of the telescopic end of the electric telescopic rod is rotationally connected with a friction roller, an attaching structure is fixed to one side of the friction roller, and grinding layers are fixedly installed at the two ends of the attaching structure. According to the multi-hole synchronous polishing device, the requirements of holes with different depths are met through the arranged auxiliary polishing device, the polishing layer can be driven to be tightly attached to the hole wall, polishing of complex structures such as straight holes and special-shaped holes is considered, multi-hole synchronous operation is achieved, and the operation process is simplified.

Description

Technical Field

[0001] This invention relates to the field of mold polishing technology, specifically to a polishing and finishing platform for a large reverse aluminum profile extrusion mold and its usage method. Background Technology

[0002] The large reverse aluminum profile extrusion die polishing and repair platform is a professional equipment designed specifically for large reverse aluminum profile extrusion dies. It is used for the precision polishing, repair and surface treatment of dies. Its core functions include: providing stable support and multi-angle positioning for the die, achieving 360° rotation and precise lifting for easy all-round operation, integrating a polishing system to improve the surface quality of the die, and equipped with a dust removal system to improve the working environment.

[0003] The equipment uses a transparent protective enclosure, which can isolate metal shavings and dust splashes during polishing without affecting the operator's observation of mold details. The operating chamber is equipped with gooseneck adjustable lighting fixtures, which can accurately illuminate the detailed areas of the mold to meet the lighting requirements for fine polishing.

[0004] The holes in aluminum profile extrusion dies are usually polished by hand. The oilstone or sandpaper rod is slowly inserted into the hole and gently pushed and pulled along the hole wall. The polishing force is manually controlled.

[0005] Because the core component of the polishing and finishing platform for large reverse aluminum profile extrusion dies is a large die weighing several tons and with a large diameter, the design is bulky and has a rough stroke. The die holes are mostly small-diameter deep holes, irregular holes, or narrow cavities. The bulky platform mechanism cannot penetrate deep into the holes and may even mechanically interfere with the die body, making it impossible to get close to the hole opening. The holes are mostly distributed inside the die, which is a closed space and obstructs the view. In order to ensure rigidity, the polishing arm of the platform is usually designed as a short-stroke, high-load structure, which cannot polish the entire circumference or deep parts of the hole wall at the same time, reducing work efficiency.

[0006] Therefore, in response to the above problems, a polishing and finishing platform for a large reverse aluminum profile extrusion die and its usage method are proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a polishing and finishing platform for a large reverse aluminum profile extrusion die and its usage method, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A polishing and finishing platform for a large reverse aluminum profile extrusion die and its usage method are disclosed. The platform includes a polishing platform with a dust collection device, a clamping mechanism, and a polisher fixed to its inner side. A perforated plate is fixed between the dust collection device, the clamping mechanism, and the polisher. An auxiliary polishing device is fixed to the side of the perforated plate away from the dust collection device. The auxiliary polishing device includes an electric telescopic rod with a friction roller rotatably connected to the top of its telescopic end. A bonding structure is fixed to one side of the friction roller, and polishing layers are fixedly installed at both ends of the bonding structure. The bonding structure includes... The device includes a hydraulic chamber with an arc-shaped groove on its outer side and a rolling structure slidably connected to its inner side. Two elastic hollow columns are fixed to the inner ends of the hydraulic chamber, and sealing rings are fixed to the outer sides of both ends of the elastic hollow columns. A pressing device is fixed to the inner ends of the elastic hollow columns. A drive device is fixed to the outer side of the telescopic end of the electric telescopic rod. The drive device includes a fixed bracket, and a drive motor is fixed to the side of the fixed bracket closest to the vacuum cleaner. The main shaft of the drive motor passes through the fixed bracket and is fixedly connected to a friction wheel. The outer side of the friction wheel makes point contact with the outer side of the friction roller.

[0010] As a further optimization of the present invention, the extrusion device includes a support frame, a stepper motor is fixed to the inner side of one end of the elastic hollow column, a drive gear is fixed to one end of the main shaft of the stepper motor, one side of the drive gear is rotatably connected to the support frame, a driven gear is meshed on the outer side of the drive gear, and a plurality of guide grooves are opened on the inner side of the driven gear.

[0011] As a further optimization of the present invention, the support frame is slidably connected to a plurality of push rods, a limit rod is fixed on one side of the straight rod, a support plate is fixed to the arc-shaped end of the limit rod, and the outer side of the limit rod is slidably connected to the inner side of the guide groove.

[0012] As a further optimization of the present invention, the rolling structure includes a guide block, a fixed shaft is fixed to the upper arc of the guide block, a ball rotates on the outside of the fixed shaft, the lower end of the guide block is in contact with the hydraulic oil inside the hydraulic chamber, the ball is disposed inside the arc groove, and the outer surface of the ball is in close contact with the inner side of the polishing layer.

[0013] As a further optimization of the present invention, the hollow plate is provided with a plurality of through holes, which are distributed in a matrix on the surface of the hollow plate. Each through hole is circular in shape, and the center distance between two adjacent through holes is consistent. The auxiliary polishing device corresponds to the position and number of the mold holes.

[0014] As a further optimization of the present invention, the arc-shaped grooves and rolling structures are distributed in a circular array on the outside of the hydraulic chamber with the central axis of the hydraulic chamber as the axis, and the number of arc-shaped grooves corresponds one-to-one with the number of rolling structures.

[0015] As a further optimization of the present invention, the inner surface curvature of each arc groove is perfectly matched with the outer surface curvature of the ball, and the depth of the arc groove is set to one-third of the diameter of the ball.

[0016] As a further optimization of the present invention, the number of sealing rings is two, and the two sealing rings are respectively fixed at the two opening positions at both ends of the elastic hollow column. The outer diameter of the sealing ring is exactly equal to the outer diameter of the elastic hollow column, and the inner diameter of the sealing ring is consistent with the inner diameter of the elastic hollow column.

[0017] As a further optimization of the present invention, the plurality of push rods are evenly distributed in a ring on the inner side of the support frame with the center of the driven gear as the center, the length of each push rod is consistent, and the driven gear is rotatably connected to the support frame.

[0018] A method for using a polishing and finishing platform for a large reverse aluminum profile extrusion die;

[0019] S1: Start the grinding platform. Based on the size and number of mold holes, ensure that the number of auxiliary grinding devices corresponds one-to-one with the position of the mold holes. Set the extension stroke of the electric telescopic rod, the speed of the drive motor, and the initial thrust threshold of the extrusion device through the control system.

[0020] S11: The large reverse aluminum profile extrusion die to be polished is hoisted onto the perforated plate of the grinding platform and clamped in a centered manner by a clamping locking mechanism to ensure that the axis of the die hole is aligned with the center of the auxiliary grinding device. The matrix-style circular through holes of the perforated plate are simultaneously aligned with the dust collection equipment to prepare for subsequent chip removal.

[0021] S2: Activate the electric telescopic rod of the auxiliary polishing device, and adjust the telescopic movement according to the depth of the mold hole to accurately deliver the bonding structure and polishing layer into the hole;

[0022] S21: When the polishing layer extends into the designated position of the hole, the stepper motor of the extrusion device starts, driving the drive gear to rotate, which in turn drives the driven gear to rotate synchronously. The guide groove on the inner side of the driven gear rotates with the gear. The tilt angle of the guide groove drives the limit rod to drive the push rod to extend radially outward along the support frame. The support plate at the top of the push rod squeezes the elastic hollow column, the internal pressure increases and is transmitted to the hydraulic oil inside the hydraulic chamber. The hydraulic oil pushes the guide block to move radially outward along the hydraulic chamber, causing the balls on the outside of the fixed shaft to be pushed out of the arc groove. As all the rolling structures push outward in a circular array around the central axis of the hydraulic chamber, the polishing layer is evenly spread out and tightly adheres to the inner wall of the mold hole. The adhesion pressure is precisely controlled by the stepper motor speed.

[0023] S22: The inner wall of the hole is uneven. The reaction force of the polishing layer is transmitted to the hydraulic oil in the hydraulic chamber through the ball bearings. The change in hydraulic oil pressure is fed back to the control system of the extrusion device. The stepper motor drives the gear speed by fine-tuning the forward and reverse rotation, thereby adjusting the extension of the push rod to ensure that the polishing layer is always in close contact with the hole wall and the pressure is uniform. The guide block of the rolling structure slides dynamically with the hydraulic oil pressure. The ball bearings flexibly adjust the angle in the arc groove to adapt to the slight curvature changes of the inner wall of the hole.

[0024] S3: Then, start the drive motor of the drive device. Its main shaft drives the fixedly connected friction wheel to rotate. Through friction, the friction roller is driven to rotate synchronously, thereby driving the polishing layer to rotate in the mold hole.

[0025] S4: The auxiliary polishing device corresponds to the number of holes in the mold. All the polishing layers in the holes rotate synchronously under the drive of their respective drive devices to achieve parallel polishing of multiple holes. The metal debris generated by polishing is quickly sucked away by the dust collection device below through the matrix-style through holes of the hollow plate.

[0026] S5: When the preset polishing time is reached or the surface roughness of the hole is detected to meet the standard, the drive motor of the drive device stops running, the friction wheel and friction roller stop rotating, the polishing layer stops working, and all structures return to their positions.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. In this invention, the auxiliary grinding device can precisely control the depth of the grinding layer by its electric telescopic rod, adapting to the needs of holes of different depths. It can drive the grinding layer to fit tightly against the hole wall, taking into account the grinding of complex structures such as straight holes and irregular holes, realizing simultaneous operation of multiple holes and simplifying the operation process.

[0029] 2. In this invention, the driving device is designed to transmit power through point contact between the friction wheel and the friction roller, which ensures the high efficiency of power transmission and avoids mechanical interference with the bonding action of the grinding layer. This ensures that the power transmission and bonding action do not affect each other during the grinding process. Combined with the multi-hole synchronous grinding design, it enables the synchronous rotation of multiple grinding layers.

[0030] 3. In this invention, the rolling structure is designed so that the curvature of the ball and the arc groove are perfectly matched, and the depth of the arc groove is one-third of the diameter of the ball. This not only effectively limits the ball and prevents it from falling off during the grinding process, but also ensures the flexible rotation of the ball, reduces the rotational resistance of the grinding layer, and ensures that the top thrust at each point of the grinding layer is uniform and consistent, adapting to the slight curvature changes of the inner wall of the hole.

[0031] 4. In this invention, through the extrusion device, the stepper motor drives the push rod to extend and retract radially through gear transmission. The bonding pressure can be flexibly adjusted according to the hole size and material to avoid problems such as excessive grinding or poor bonding. Multiple push rods are evenly distributed in a ring around the driven gear to ensure that the grinding layer is subjected to balanced force. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the installation position of the drive device of the present invention;

[0034] Figure 3 This is a schematic diagram of the overall structure of the auxiliary polishing device of the present invention;

[0035] Figure 4 This is a schematic diagram of the installation position of the fitting structure of the present invention;

[0036] Figure 5 This is a schematic diagram of the cross-sectional structure of the polishing layer of the present invention;

[0037] Figure 6 This is a schematic diagram of the cross-sectional structure of the hydraulic chamber and the elastic hollow column of the present invention;

[0038] Figure 7 This is a schematic diagram of the overall structure of the extrusion device of the present invention;

[0039] Figure 8 This is a schematic diagram of the disassembled driven gear structure of the present invention;

[0040] Figure 9 This is a schematic diagram of the disassembled rolling structure of the present invention.

[0041] In the diagram: 1. Grinding platform; 2. Dust collection equipment; 3. Clamping locking mechanism; 4. Grinding tool; 5. Perforated plate;

[0042] 6. Drive unit; 61. Fixed bracket; 62. Drive motor; 63. Friction wheel;

[0043] 7. Auxiliary polishing device; 71. Electric telescopic rod; 72. Friction roller; 73. Polishing layer;

[0044] 74. Fitting structure; 741. Hydraulic chamber; 742. Arc-shaped groove;

[0045] 743, Rolling structure; 7431, Guide block; 7432, Fixed shaft; 7433, Ball bearing;

[0046] 744. Elastic hollow column;

[0047] 745. Extrusion device; 7451. Support frame; 7452. Stepper motor; 7453. Drive gear; 7454. Driven gear; 7455. Guide groove; 7456. Push rod; 7457. Limiting rod; 7458. Support plate;

[0048] 746. Sealing ring. Detailed Implementation

[0049] Please see Figures 1-9 The present invention provides a technical solution:

[0050] A polishing and finishing platform for a large reverse aluminum profile extrusion die and its usage method are disclosed. The platform includes a polishing platform 1, with a dust collection device 2, a clamping mechanism 3, and a polisher 4 fixed inside the platform 1. A perforated plate 5 is fixed between the dust collection device 2, the clamping mechanism 3, and the polisher 4. An auxiliary polishing device 7 is fixed to the side of the perforated plate 5 away from the dust collection device 2. The auxiliary polishing device 7 includes an electric telescopic rod 71, with a friction roller 72 rotatably connected to the top of the telescopic end of the electric telescopic rod 71. A bonding structure 74 is fixed to one side of the friction roller 72, and polishing layers 73 are fixedly installed at both ends of the bonding structure 74. The bonding structure 74 includes a hydraulic chamber 741. An arc-shaped groove 742 is provided on the outer side of the hydraulic chamber 741. A rolling structure 743 is slidably connected to the inner side of the hydraulic chamber 741. Elastic hollow columns 744 are fixed at both ends of the inner side of the hydraulic chamber 741. Sealing rings 746 are fixed on the outer sides of both ends of the elastic hollow columns 744. Extrusion devices 745 are fixed on both ends of the inner side of the elastic hollow columns 744. A drive device 6 is fixed on the outer side of the telescopic end of the electric telescopic rod 71. The drive device 6 includes a fixed bracket 61. A drive motor 62 is fixed on the side of the fixed bracket 61 near the vacuum cleaner 2. The main shaft of the drive motor 62 passes through the fixed bracket 61 and is fixedly connected to the friction wheel 63. The outer side of the friction wheel 63 is in point contact with the outer side of the friction roller 72.

[0051] The extrusion device 745 includes a support frame 7451, a stepper motor 7452 fixed to the inner side of one end of an elastic hollow column 744, a drive gear 7453 fixed to one end of the main shaft of the stepper motor 7452, one side of the drive gear 7453 being rotatably connected to the support frame 7451, a driven gear 7454 meshing with the outer side of the drive gear 7453, a plurality of guide grooves 7455 being opened on the inner side of the driven gear 7454, a plurality of push rods 7456 being slidably connected to the inner side of the support frame 7451, a limit rod 7457 fixed to the straight side of the push rod 7456, a support plate 7458 fixed to the arc-shaped end of the limit rod 7457, and the outer side of the limit rod 7457 being slidably connected to the inner side of the guide groove 7455.

[0052] Through the meshing transmission of the drive gear 7453 and the driven gear 7454, combined with the sliding cooperation of the guide groove 7455 and the limiting rod 7457, the radial extension and retraction of the push rod 7456 can be achieved, which can accurately control the bonding pressure of the polishing layer 73, avoid over-polishing or poor bonding, and improve the uniformity of polishing of the inner wall of the hole.

[0053] The rolling structure 743 includes a guide block 7431, a fixed shaft 7432 fixed at the upper arc of the guide block 7431, a ball bearing 7433 rotating on the outer side of the fixed shaft 7432, the lower end of the guide block 7431 in contact with the hydraulic oil inside the hydraulic chamber 741, the ball bearing 7433 being disposed inside the arc groove 742, and the outer surface of the ball bearing 7433 being in close contact with the inner side of the polishing layer 73.

[0054] The combined design of guide block 7431, fixed shaft 7432 and ball bearing 7433, together with the pressure transmission of hydraulic chamber 741, allows ball bearing 7433 to flexibly push the polishing layer 73. Moreover, the curvature of ball bearing 7433 and arc groove 742 are perfectly matched, ensuring the stability of the fit between polishing layer 73 and the inner wall of hole, and preventing the polishing layer 73 from shifting during the polishing process.

[0055] The perforated plate 5 has multiple through holes, which are distributed in a matrix on the surface of the perforated plate 5. Each through hole is circular in shape, and the center distance between two adjacent through holes is consistent. The auxiliary grinding device 7 corresponds to the position and number of the mold holes.

[0056] The matrix-like distribution of circular through holes, with the center-to-center spacing of adjacent through holes, ensures that the dust suction airflow evenly covers the entire working area, the debris discharge path is smooth, and local debris accumulation is avoided. The circular through hole design reduces the impact on the load-bearing capacity of the hollow plate 5 and ensures the stability of the large mold after placement.

[0057] The arc-shaped grooves 742 and the rolling structure 743 are arranged in a circular array on the outside of the hydraulic chamber 741 with the central axis of the hydraulic chamber 741 as the axis. The number of arc-shaped grooves 742 corresponds one-to-one with the number of rolling structures 743. The arc-shaped grooves 742 and the rolling structure 743 are arranged in a circular array to ensure that the polishing layer 73 is pushed evenly and to avoid damage to the polishing layer 73 or uneven polishing of the inner wall of the hole caused by local force concentration.

[0058] The inner surface curvature of each arc groove 742 is perfectly matched with the outer surface curvature of the ball 7433. The depth of the arc groove 742 is set to one-third of the diameter of the ball 7433. The balls 7433 are distributed in a circular array around the central axis of the hydraulic chamber 741, so that the pushing force at each point of the polishing layer 73 is uniform and consistent, further improving the polishing smoothness of the inner wall of the hole, especially suitable for polishing complex curved surfaces of irregular holes and deep holes.

[0059] There are two sealing rings 746, which are fixed at the two open ends of the elastic hollow column 744. The outer diameter of the sealing ring 746 is exactly the same as the outer diameter of the elastic hollow column 744, and the inner diameter of the sealing ring 746 is consistent with the inner diameter of the elastic hollow column 744. The sealing ring 746 is fixed at the two open ends of the elastic hollow column 744, and its inner and outer diameters are perfectly matched with those of the elastic hollow column 744, so as to achieve the sealing effect of the elastic hollow column 744, avoid pressure transmission failure caused by hydraulic oil leakage, and ensure the pushing accuracy of the fitting structure 74.

[0060] Multiple push rods 7456 are evenly distributed in a ring on the inner side of the support frame 7451 with the center of the driven gear 7454 as the center. The length of each push rod 7456 is consistent. The driven gear 7454 is rotatably connected to the support frame 7451. The multiple push rods 7456 are evenly distributed in a ring on the inner side of the support frame 7451 with consistent length to ensure the synchronicity of the extension of the push rods 7456 and to avoid the tilting of the polishing layer 73 caused by the inconsistent extension and retraction of the push rods 7456, thus ensuring the complete fit between the polishing layer 73 and the inner wall of the hole.

[0061] Workflow: Start the grinding platform 1. Based on the size and number of mold holes, ensure that the number of auxiliary grinding devices 7 corresponds one-to-one with the position of the mold holes. Set the extension stroke of the electric telescopic rod 71, the speed of the drive motor 62, and the initial thrust threshold of the extrusion device 745 through the control system.

[0062] The large reverse aluminum profile extrusion die to be polished is hoisted onto the hollow plate 5 of the polishing platform 1 and clamped by the clamping locking mechanism 3 to ensure that the axis of the die hole is aligned with the center of the auxiliary polishing device 7. The matrix-style circular through holes of the hollow plate 5 are simultaneously aligned with the dust collection device 2 to prepare for subsequent chip removal.

[0063] The electric telescopic rod 71 of the auxiliary polishing device 7 is activated, and its extension and retraction are adjusted according to the depth of the mold hole to precisely deliver the bonding structure 74 and the polishing layer 73 into the hole. When the polishing layer 73 reaches the designated position in the hole, the stepper motor 7452 of the extrusion device 745 is activated, driving the drive gear 7453 to rotate, which in turn drives the driven gear 7454 to rotate synchronously. The guide groove 7455 on the inner side of the driven gear 7454 rotates with the gear, and the tilt angle of the guide groove 7455 drives the limiting rod 7457 to drive the push rod 7456 radially along the support frame 7451. Extending outward, the support plate 7458 at the top of the push rod 7456 squeezes the elastic hollow column 744, increasing the internal pressure and transmitting it to the hydraulic oil inside the hydraulic chamber 741. The hydraulic oil pushes the guide block 7431 to move radially outward along the hydraulic chamber 741, causing the balls 7433 on the outside of the fixed shaft 7432 to be pushed out of the arc groove 742. As all the rolling structures 743 push outward in a circular array around the central axis of the hydraulic chamber 741, the polishing layer 73 is evenly spread out and tightly adheres to the inner wall of the mold hole. The adhesion pressure is precisely controlled by the speed of the stepper motor 7452.

[0064] The inner wall of the hole is uneven. The reaction force of the polishing layer 73 is transmitted to the hydraulic oil in the hydraulic chamber 741 through the ball bearing 7433. The change in hydraulic oil pressure is fed back to the control system of the extrusion device 745. The stepper motor 7452 drives the gear 7453 to rotate by forward and reverse fine adjustment, thereby adjusting the extension of the push rod 7456 to ensure that the polishing layer 73 is always in close contact with the hole wall and the pressure is uniform. The guide block 7431 of the rolling structure 743 slides dynamically with the hydraulic oil pressure. The ball bearing 7433 flexibly adjusts the angle in the arc groove 742 to adapt to the slight curvature change of the inner wall of the hole.

[0065] Then, the drive motor 62 of the drive device 6 is started, and its main shaft drives the fixedly connected friction wheel 63 to rotate. The friction roller 72 is fixedly connected to the bonding structure 74, which in turn drives the polishing layer 73 to rotate in the mold hole. During the polishing process, the balls 7433 of the rolling structure 743 not only support the polishing layer 73, but also rotate synchronously with the polishing layer 73, reducing the frictional loss between the polishing layer 73 and the hydraulic chamber 741.

[0066] The auxiliary polishing device 7 corresponds to the number of holes in the mold. All the polishing layers 73 in the holes rotate synchronously under the drive of their respective drive devices 6, realizing parallel polishing of multiple holes. The metal chips generated by polishing are quickly sucked away by the dust collection device 2 below through the matrix through holes of the hollow plate 5, avoiding chip accumulation and scratching the hole wall.

[0067] When the preset polishing time is reached or the surface roughness of the hole is detected to meet the standard, the drive motor 62 of the drive device 6 stops running, the friction wheel 63 and the friction roller 72 stop rotating, the polishing layer 73 stops working, and all structures return to their positions.

[0068] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A polishing and finishing platform for a large reverse aluminum profile extrusion die, comprising a grinding platform (1), characterized in that: The grinding platform (1) is fixed with a dust collection device (2), a clamping mechanism (3) and a grinder (4) on its inner side. A perforated plate (5) is fixed between the dust collection device (2), the clamping mechanism (3) and the grinder (4). An auxiliary grinding device (7) is fixed on the side of the perforated plate (5) away from the dust collection device (2). The auxiliary grinding device (7) includes an electric telescopic rod (71). A friction roller (72) is rotatably connected to the top end of the telescopic end of the electric telescopic rod (71). A fitting structure (74) is fixed on one side of the friction roller (72). A grinding layer (73) is fixedly installed at both ends of the fitting structure (74). The bonding structure (74) includes a hydraulic chamber (741), an arc-shaped groove (742) is provided on the outer side of the hydraulic chamber (741), a rolling structure (743) is slidably connected to the inner side of the hydraulic chamber (741), an elastic hollow column (744) is fixed at both ends of the inner side of the hydraulic chamber (741), a sealing ring (746) is fixed on the outer side of both ends of the elastic hollow column (744), and a pressing device (745) is fixed at both ends of the inner side of the elastic hollow column (744). The electric telescopic rod (71) has a drive device (6) fixed on the outside of its telescopic end. The drive device (6) includes a fixed bracket (61). A drive motor (62) is fixed on the side of the fixed bracket (61) near the vacuum cleaner (2). The main shaft of the drive motor (62) passes through the fixed bracket (61) and is fixedly connected to the friction wheel (63). The outside of the friction wheel (63) is in point contact with the outside of the friction roller (72).

2. The polishing and finishing platform for a large reverse aluminum profile extrusion die according to claim 1, characterized in that: The extrusion device (745) includes a support frame (7451), a stepper motor (7452) is fixed to the inner side of one end of the elastic hollow column (744), a drive gear (7453) is fixed to one end of the main shaft of the stepper motor (7452), one side of the drive gear (7453) is rotatably connected to the support frame (7451), a driven gear (7454) meshes with the outer side of the drive gear (7453), and a plurality of guide grooves (7455) are opened on the inner side of the driven gear (7454).

3. The polishing and finishing platform for a large reverse aluminum profile extrusion die according to claim 2, characterized in that: Multiple push rods (7456) are slidably connected to the inner side of the support frame (7451). A limit rod (7457) is fixed on one side of the straight rod of the push rod (7456). A support plate (7458) is fixed to the arc-shaped end of the limit rod (7457). The outer side of the limit rod (7457) is slidably connected to the inner side of the guide groove (7455).

4. The polishing and finishing platform for a large reverse aluminum profile extrusion die according to claim 1, characterized in that: The rolling structure (743) includes a guide block (7431), a fixed shaft (7432) is fixed at the upper arc of the guide block (7431), a ball (7433) rotates on the outside of the fixed shaft (7432), the lower end of the guide block (7431) is in contact with the hydraulic oil inside the hydraulic chamber (741), the ball (7433) is disposed inside the arc groove (742), and the outer surface of the ball (7433) is in close contact with the inner side of the polishing layer (73).

5. The polishing and finishing platform for a large reverse aluminum profile extrusion die according to claim 1, characterized in that: The perforated plate (5) has multiple through holes, which are distributed in a matrix on the surface of the perforated plate (5). Each through hole is circular in shape, and the center distance between two adjacent through holes is consistent. The auxiliary polishing device (7) corresponds to the position and number of the mold holes.

6. The polishing and finishing platform for a large reverse aluminum profile extrusion die according to claim 1, characterized in that: The arc-shaped grooves (742) and the rolling structures (743) are arranged in a circular array on the outside of the hydraulic chamber (741) with the central axis of the hydraulic chamber (741) as the axis. The number of arc-shaped grooves (742) corresponds one-to-one with the number of rolling structures (743).

7. The polishing and finishing platform for a large reverse aluminum profile extrusion die according to claim 1, characterized in that: The inner surface curvature of each of the arc grooves (742) is perfectly matched with the outer surface curvature of the ball (7433), and the depth of the arc groove (742) is set to one-third of the diameter of the ball (7433).

8. The polishing and finishing platform for a large reverse aluminum profile extrusion die according to claim 1, characterized in that: There are two sealing rings (746), which are fixed at the two opening positions at both ends of the elastic hollow column (744). The outer diameter of the sealing ring (746) is exactly the same as the outer diameter of the elastic hollow column (744), and the inner diameter of the sealing ring (746) is consistent with the inner diameter of the elastic hollow column (744).

9. The polishing and finishing platform for a large reverse aluminum profile extrusion die according to claim 3, characterized in that: Multiple push rods (7456) are evenly distributed in a ring on the inner side of the support frame (7451) with the center of the driven gear (7454) as the center. The length of each push rod (7456) is consistent. The driven gear (7454) is rotatably connected to the support frame (7451).

10. A method for using a polishing and finishing platform for a large reverse aluminum profile extrusion die according to any one of claims 1-9, characterized in that: S1: Start the grinding platform (1). According to the size and number of mold holes, ensure that the number of auxiliary grinding devices (7) corresponds to the position of the mold holes one by one. Set the extension stroke of the electric telescopic rod (71), the speed of the drive motor (62), and the initial thrust threshold of the extrusion device (745) through the control system. S11: The large reverse aluminum profile extrusion mold to be polished is hoisted onto the hollow plate (5) of the polishing platform (1) and centered and clamped by the clamping mechanism (3) to ensure that the axis of the mold hole is aligned with the center of the auxiliary polishing device (7). The matrix circular through holes of the hollow plate (5) are aligned with the dust collection device (2) to prepare for subsequent chip removal. S2: Start the electric telescopic rod (71) of the auxiliary polishing device (7), adjust the telescopic rod according to the depth of the mold hole, and accurately send the bonding structure (74) and polishing layer (73) into the hole; S21: When the polished layer (73) extends into the designated position of the hole, the stepper motor (7452) of the extrusion device (745) starts, driving the drive gear (7453) to rotate, which in turn drives the driven gear (7454) to rotate synchronously. The guide groove (7455) on the inner side of the driven gear (7454) rotates with the gear. The tilt angle of the guide groove (7455) drives the limiting rod (7457) to drive the push rod (7456) to extend radially outward along the support frame (7451). The support plate (7458) at the top of the push rod (7456) extrudes... The internal pressure of the elastic hollow column (744) increases and is transmitted to the hydraulic oil inside the hydraulic chamber (741). The hydraulic oil pushes the guide block (7431) to move radially outward along the hydraulic chamber (741), causing the balls (7433) on the outside of the fixed shaft (7432) to be pushed out of the arc groove (742). As all the rolling structures (743) push in a circular array around the central axis of the hydraulic chamber (741), the polishing layer (73) is evenly spread out and tightly fits the inner wall of the mold hole. The fitting pressure is precisely controlled by the speed of the stepper motor (7452). S22: The inner wall of the hole is uneven. The reaction force of the polishing layer (73) is transmitted to the hydraulic oil in the hydraulic chamber (741) through the ball (7433). The change in hydraulic oil pressure is fed back to the control system of the extrusion device (745). The stepper motor (7452) adjusts the speed of the drive gear (7453) by forward and reverse rotation, thereby adjusting the extension of the push rod (7456) to ensure that the polishing layer (73) is always in close contact with the hole wall and the pressure is uniform. The guide block (7431) of the rolling structure (743) slides dynamically with the hydraulic oil pressure. The ball (7433) flexibly adjusts the angle in the arc groove (742) to adapt to the small arc change of the inner wall of the hole. S3: Then, start the drive motor (62) of the drive device (6), whose main shaft drives the fixedly connected friction wheel (63) to rotate, and drives the friction roller (72) to rotate synchronously through friction, thereby driving the polishing layer (73) to rotate in the mold hole; S4: The auxiliary polishing device (7) corresponds to the number of mold holes. All the polishing layers (73) in the holes rotate synchronously under the drive of their respective drive devices (6) to achieve multi-hole parallel polishing. The metal chips generated by polishing are quickly sucked away by the vacuuming device (2) below through the matrix through holes of the hollow plate (5). S5: When the preset polishing time is reached or the surface roughness of the hole is detected to meet the standard, the drive motor (62) of the drive device (6) stops running, the friction wheel (63) and the friction roller (72) stop rotating, the polishing layer (73) stops working, and each structure returns to its position.

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