Precise surface grinding machine with air suction rotary table

Abstract

The utility model relates to the technical field of grinding machines, in particular to an air suction rotary table precision surface grinding machine which comprises a working table, a linear motion module is installed on the working table, a dragging plate is installed on the linear motion module, a supporting seat is installed on the dragging plate, a rotary driving assembly is installed on the supporting seat, and an air suction carrying table is connected to the rotary driving assembly. The bottom of the air suction platform deck is rotationally connected with a supporting ring, the supporting ring is fixedly connected into the supporting seat, the supporting seat is further provided with a negative pressure generating assembly connected with the air suction platform deck, the surface of the air suction platform deck is provided with a plurality of annularly-divergent negative pressure holes, and self-adaptive suction nozzle assemblies are fixedly arranged in the negative pressure holes; according to the precise surface grinding machine with the air suction rotary table, workpieces in complex shapes can be precisely adsorbed, machining vibration caused by uneven adsorption force can be reduced, a negative pressure hole does not need to be adjusted according to the sizes of the workpieces, and the precise surface grinding machine can adapt to direct adsorption and fixation of various workpieces and has the advantages of being easy to operate and high in adsorption force.

Description

Technical Field

[0001] This utility model relates to the field of grinding technology, specifically to a precision surface grinder with an air suction rotary table. Background Technology

[0002] Precision surface grinders employ various methods for workpiece fixation, primarily including fixtures, electromagnetic chucks, and pneumatic suction stages. Traditional pneumatic suction stages rely on the principle of continuous negative pressure adsorption across the entire surface. This involves continuously evacuating air from an array of negative pressure holes on the stage surface using a vacuum pump, utilizing atmospheric pressure to press the workpiece onto the stage. Traditional fully open negative pressure structures require the workpiece to completely cover the negative pressure holes for effective sealing. However, for irregularly shaped parts (such as those with grooves, steps, or hollow structures) or small workpieces, uncovered negative pressure holes can lead to overall negative pressure leakage, reduced adsorption force, and consequently, machining vibration or workpiece displacement, resulting in flatness errors. Furthermore, partially open negative pressure structures require adjustments based on the part size each time, leading to cumbersome operation. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a precision surface grinder with a pneumatic suction turntable, which solves the technical problem that existing surface grinders are unable to automatically match workpieces and achieve adsorption.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a pneumatic suction rotary table precision surface grinder, including a worktable, a linear motion module mounted on the worktable, a slide mounted on the linear motion module, a support base mounted on the slide, a rotary drive assembly mounted on the support base, a pneumatic suction stage connected to the rotary drive assembly, a support ring rotatably connected to the bottom of the pneumatic suction stage, the support ring being fixedly connected to the support base, a negative pressure generating assembly connected to the pneumatic suction stage being mounted on the support base, a plurality of annularly diverging negative pressure holes being provided on the surface of the pneumatic suction stage, an adaptive suction nozzle assembly being fixedly installed in the negative pressure holes, a column being mounted on the worktable, and a grinding head assembly being provided on the column;

[0005] The adaptive suction nozzle assembly includes two sets of springs installed on the side wall of the negative pressure hole. The two sets of springs are symmetrically arranged. One end of each set of springs is connected to a sealing block that moves within the negative pressure hole. Above the two sealing blocks, there is a sleeve fixed within the negative pressure hole. The sleeve has an inner hole, and a pin is movably installed in the inner hole. A spherical block is fixed at the bottom of the pin.

[0006] Preferably, the cross-section of the sealing block is a right-angled trapezoid.

[0007] Preferably, a guide block is fixed on the outer wall of the ejector pin, and the guide block is slidably disposed in a guide groove opened on the inner wall of the inner hole.

[0008] Preferably, the bottom of the inner hole is provided with an inner spherical surface that is adapted to the spherical block.

[0009] Preferably, the rotary drive assembly includes a motor mounted on a support base, a drive wheel fixedly mounted on the output shaft of the motor, the drive wheel being connected to a driven wheel via a belt, and the driven wheel being fixedly mounted to the bottom of the air suction platform.

[0010] Preferably, the negative pressure generating component includes a vacuum pump mounted on a support base, a vacuum tube connected to the vacuum pump, a vacuum gauge mounted on the vacuum tube, one end of the vacuum tube passing through the support base and connected to a rotary joint, a connecting pipe connected to the rotary joint, and the connecting pipe fixed to the center of the bottom of the air suction platform.

[0011] Preferably, the air suction platform has a disc-shaped cavity inside, which is connected to the connecting pipe and the negative pressure hole.

[0012] Preferably, the bottom of the support ring has a notch corresponding to the position of the vacuum tube.

[0013] By employing the above technical solution, this utility model provides a precision surface grinder with an air suction rotary table, which has at least the following beneficial effects:

[0014] 1. This air suction rotary table precision surface grinder has an adaptive suction nozzle assembly installed in the negative pressure hole of the air suction stage. When the workpiece is placed on the air suction stage, the workpiece will squeeze the ejector pin on the adaptive suction nozzle assembly and open the negative pressure hole. When the workpiece is not in contact with the workpiece, the negative pressure hole is closed under the action of the adaptive suction nozzle assembly. This avoids the problem of decreased adsorption force caused by negative pressure in the whole area. It can accurately adsorb workpieces with complex shapes, reduce processing vibration caused by uneven adsorption force, and does not require adjustment of the negative pressure hole according to the workpiece size. It can adapt to the direct adsorption and fixation of various workpieces and has the advantages of simple operation and strong adsorption force.

[0015] 2. This air suction rotary table precision surface grinder, because the air suction stage is in a rotating state during operation, can avoid the problem of pipe tangling by setting a rotary joint, and can also ensure sealing and avoid insufficient suction force caused by air leakage. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0017] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0018] Figure 2 This is a schematic diagram of the structure of each component on the support base of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection between the rotary drive assembly and the air suction platform of this utility model;

[0020] Figure 4 This is a cross-sectional structural schematic diagram of the air suction platform of this utility model;

[0021] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A;

[0022] Figure 6 This is a schematic diagram showing the internal cross-section of the sleeve of this utility model.

[0023] Figure label:

[0024] 1. Worktable; 2. Linear motion module; 3. Slide plate; 4. Support base; 5. Rotary drive assembly; 501. Motor; 502. Drive wheel; 503. Belt; 504. Driven wheel; 6. Support ring; 601. Notch; 7. Air suction platform; 701. Disc-shaped cavity; 702. Negative pressure hole; 8. Negative pressure generating assembly; 801. Vacuum pump; 802. Vacuum tube; 803. Rotary joint; 804. Connecting pipe; 805. Vacuum degree gauge; 9. Adaptive suction nozzle assembly; 901. Spring; 902. Sealing block; 903. Sleeve; 9031. Guide groove; 9032. Inner spherical surface; 904. Ejector pin; 905. Spherical block; 906. Guide block; 10. Column; 11. Grinding head assembly. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Precision surface grinders, as core equipment in the field of machining, are widely used in high-precision manufacturing scenarios such as aerospace, precision molds, optical components, and semiconductors.

[0027] Due to the inherent limitations of existing technologies in automatically matching workpieces and achieving adsorption, please refer to... Figures 1-6This embodiment provides a pneumatic suction rotary table precision surface grinder, which avoids the problem of decreased adsorption force caused by negative pressure throughout the entire area. It can accurately adsorb complex-shaped workpieces, reduce processing vibration caused by uneven adsorption force, and eliminates the need to adjust the negative pressure hole 702 according to the workpiece size. It can adapt to the direct adsorption and fixation of various workpieces and has the advantages of simple operation and strong adsorption force. The surface grinder includes a worktable 1, a linear motion module 2 installed on the worktable 1, a slide 3 installed on the linear motion module 2, a support base 4 installed on the slide 3, and a mounting plate 4 installed on the support base 4. A rotary drive assembly 5 is provided, which enables the air suction platform 7 to rotate, allowing the workpiece to complete the grinding operation during rotation. The air suction platform 7 is connected to the rotary drive assembly 5, and a support ring 6 is rotatably connected to the bottom of the air suction platform 7. The support ring 6 is fixed within a support base 4. A negative pressure generating assembly 8, connected to the air suction platform 7, is also installed on the support base 4. The negative pressure generating assembly 8 generates negative pressure within the air suction platform 7, thereby firmly adsorbing the workpiece onto the air suction platform 7, thus fixing the workpiece during the grinding process. The surface is provided with multiple annularly radiating negative pressure holes 702. The negative pressure holes 702 in the center are more densely packed, while those on the outer edges are sparser. This provides stronger adsorption force for small workpieces and better adsorption effect for large workpieces. An adaptive suction nozzle assembly 9 is fixed inside the negative pressure hole 702. The adaptive suction nozzle assembly 9 is used to control the flow of the negative pressure hole 702 to adapt to the fixation of different workpieces. A column 10 is also installed on the worktable 1, and a grinding head assembly 11 is installed on the column 10. In use, the workpiece is placed on the air suction stage 7. The workpiece will squeeze the ejector pin 904 on the adaptive suction nozzle assembly 9 and open the negative pressure hole 702. The negative pressure hole 702 is closed under the action of the adaptive suction nozzle assembly 9 for parts that are not in contact with the workpiece. When the negative pressure generating assembly 8 runs, it will generate a negative pressure adsorption effect on the open negative pressure hole 702, thereby firmly adsorbing the workpiece on the air suction stage 7. After the workpiece is fixed, the surface of the workpiece can be polished by the cooperation of the linear motion module 2 and the grinding head assembly 11.

[0028] Traditional air suction stage 7 uses a fixed, fully open negative pressure orifice 702, which cannot dynamically control the adsorption area according to the workpiece shape. This leads to unstable adsorption of irregularly shaped parts and negative pressure leakage for small-sized workpieces. Alternatively, using a partially open negative pressure orifice 702 requires adjustment according to the part size, resulting in cumbersome operation. For solutions to this problem, please refer to... Figures 4-6The adaptive suction nozzle assembly 9 includes two sets of springs 901 mounted on the side wall of the negative pressure hole 702. The two sets of springs 901 are symmetrically arranged, and one end of each set of springs 901 is connected to a sealing block 902 that moves within the negative pressure hole 702. Above the two sealing blocks 902, there is a sleeve 903 fixed within the negative pressure hole 702. The sleeve 903 has an inner hole, in which a push pin 904 is movably mounted. A spherical block 905 is fixed at the bottom of the push pin 904. When the workpiece is placed on the air suction platform 7, the workpiece will squeeze the push pin 904 on the adaptive suction nozzle assembly 9 and cause the spherical block 905 to move downward. The spherical block 905 squeezes the two sealing blocks 902 below to move. When the two sealing blocks 902 leak a gap, the negative pressure hole 702 is in the open state. When it is not in contact with the workpiece, the negative pressure hole 702 is in the closed state under the action of the adaptive suction nozzle assembly 9, thereby realizing the automatic matching of the negative pressure hole 702 and the workpiece.

[0029] Furthermore, the cross-section of the sealing block 902 is a right-angled trapezoid; the design of the right-angled trapezoid can ensure that the spherical block 905 can squeeze the two sealing blocks 902 to move, and can also make the contact surface of the two sealing blocks 902 a plane to ensure sealing.

[0030] Furthermore, a guide block 906 is fixed on the outer wall of the ejector pin 904, and the guide block 906 is slidably disposed in the guide groove 9031 opened on the inner wall of the inner hole; through the sliding action of the guide block 906 and the guide groove 9031, the ejector pin 904 can be ensured to move stably up and down in the vertical direction, avoiding the problem of the ejector pin 904 shaking.

[0031] Furthermore, an inner spherical surface 9032 adapted to the spherical block 905 is provided at the bottom of the inner hole; when the negative pressure hole 702 is in the closed state, the spherical block 905 is pressed upward by the sealing block 902 and adheres to the inner spherical surface 9032. In this way, the sealing block 902 can form a primary seal on the negative pressure hole 702, while the spherical block 905 and the inner spherical surface 9032 can form a secondary seal on the negative pressure hole 702, which has a double sealing effect and better sealing performance.

[0032] To achieve comprehensive grinding of the workpiece surface, please refer to... Figure 3 The rotary drive assembly 5 includes a motor 501 mounted on a support base 4. A drive wheel 502 is fixed on the output shaft of the motor 501. The drive wheel 502 is connected to a driven wheel 504 via a belt 503. The driven wheel 504 is fixed to the bottom of the air suction platform 7. The operation of the motor 501 can drive the drive wheel 502 to rotate. The drive wheel 502 drives the driven wheel 504 to rotate via the belt 503. The driven wheel 504 drives the air suction platform 7 to rotate, thereby rotating the workpiece.

[0033] To maintain a stable negative pressure within the air suction stage 7, please refer to... Figure 2 and Figure 3 The negative pressure generating component 8 includes a vacuum pump 801 mounted on a support base 4. A vacuum tube 802 is connected to the vacuum pump 801, and a vacuum gauge 805 is mounted on the vacuum tube 802. One end of the vacuum tube 802 passes through the support base 4 and is connected to a rotary joint 803. A connecting pipe 804 is connected to the rotary joint 803 and is fixed to the center of the bottom of the air suction platform 7. The vacuum pump 801 operates and discharges the air inside the air suction platform 7 through the vacuum tube 802, rotary joint 803, and connecting pipe 804, thereby forming a vacuum negative pressure state. Since the air suction platform 7 is in a rotating state during operation, the rotary joint 803 can avoid the problem of pipe tangling and ensure sealing, avoiding insufficient suction force caused by air leakage.

[0034] Furthermore, a disc-shaped cavity 701 is provided inside the air suction platform 7, and the disc-shaped cavity 701 is connected to the connecting pipe 804 and the negative pressure hole 702; through the disc-shaped cavity 701, it can be connected to all the negative pressure holes 702, so that the adsorption effect can be achieved when facing different workpieces.

[0035] Furthermore, the bottom of the support ring 6 is provided with a notch 601 corresponding to the position of the vacuum tube 802; the notch 601 is provided to avoid the vacuum tube 802, so that the vacuum tube 802 can extend into the support ring 6 and connect to the center of the air suction stage 7.

[0036] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision surface grinder with a pneumatic suction rotary table, comprising a worktable (1), characterized in that: A linear motion module (2) is installed on the workbench (1), a slide plate (3) is installed on the linear motion module (2), a support base (4) is installed on the slide plate (3), a rotary drive assembly (5) is installed on the support base (4), an air suction platform (7) is connected to the rotary drive assembly (5), a support ring (6) is rotatably connected to the bottom of the air suction platform (7), the support ring (6) is fixed in the support base (4), a negative pressure generating assembly (8) connected to the air suction platform (7) is also installed on the support base (4), a plurality of annularly divergent negative pressure holes (702) are provided on the surface of the air suction platform (7), an adaptive suction nozzle assembly (9) is fixed in the negative pressure holes (702), a column (10) is also installed on the workbench (1), and a grinding head assembly (11) is provided on the column (10). The adaptive suction nozzle assembly (9) includes two sets of springs (901) installed on the side wall of the negative pressure hole (702). The two sets of springs (901) are symmetrically arranged. One end of each set of springs (901) is connected to a sealing block (902) that moves within the negative pressure hole (702). Above the two sealing blocks (902), there is a sleeve (903) fixed within the negative pressure hole (702). The sleeve (903) has an inner hole, and a pin (904) is movably installed in the inner hole. A spherical block (905) is fixed at the bottom of the pin (904).

2. The air-suction rotary table precision surface grinder according to claim 1, characterized in that: The cross-section of the sealing block (902) is a right trapezoid.

3. The air-suction rotary table precision surface grinder according to claim 1, characterized in that: A guide block (906) is fixed on the outer wall of the ejector pin (904), and the guide block (906) is slidably disposed in the guide groove (9031) opened on the inner wall of the inner hole.

4. The air-suction rotary table precision surface grinder according to claim 1, characterized in that: The bottom of the inner hole is provided with an inner spherical surface (9032) that is adapted to the spherical block (905).

5. The air-suction rotary table precision surface grinder according to claim 1, characterized in that: The rotary drive assembly (5) includes a motor (501) mounted on a support base (4). A drive wheel (502) is fixed on the output shaft of the motor (501). The drive wheel (502) is connected to the driven wheel (504) via a belt (503). The driven wheel (504) is fixed to the bottom of the air suction platform (7).

6. The air-suction rotary table precision surface grinder according to claim 1, characterized in that: The negative pressure generating component (8) includes a vacuum pump (801) installed on the support base (4), a vacuum tube (802) connected to the vacuum pump (801), a vacuum gauge (805) installed on the vacuum tube (802), one end of the vacuum tube (802) passing through the support base (4) and connected to a rotary joint (803), a connecting pipe (804) connected to the rotary joint (803), and the connecting pipe (804) fixed at the center of the bottom of the air suction platform (7).

7. The air-suction rotary table precision surface grinder according to claim 6, characterized in that: The air suction platform (7) has a disc-shaped cavity (701) inside, which is connected to the connecting pipe (804) and the negative pressure hole (702).

8. The air-suction rotary table precision surface grinder according to claim 6, characterized in that: The bottom of the support ring (6) has a notch (601) corresponding to the position of the vacuum tube (802).

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