Grinding structure for optical crystal blank machining

Abstract

The utility model relates to the technical field of optical crystal blank processing, in particular to a grinding structure for optical crystal blank processing, which comprises a support frame arranged on a machine base, a grinding component for performing targeted adjustment grinding according to the position of an optical crystal blank is arranged on the support frame, and a mounting plate is arranged on the machine base. A placing seat is mounted on the mounting plate, a vacuum suction pipe is mounted on the placing seat, a vacuum chuck for adsorbing and fixing an optical crystal blank is mounted at the top of the vacuum suction pipe, and a rotating mechanism for driving the vacuum suction pipe to rotate is arranged on the vacuum suction pipe. According to the utility model, the crystal blank is firmly adsorbed on the vacuum chuck through the vacuum suction force generated by the vacuum pump, so that the influence on the optical performance of the crystal blank caused by the damage to the corners of the crystal blank due to side edge clamping is avoided, and the vacuum chuck is a rubber pad with a cambered surface structure at the top, has certain elasticity, and can be better attached to the cambered surface crystal blank; the friction force with a crystal blank is increased, so that the adsorption stability is improved.

Description

Technical Field

[0001] This utility model relates to the field of optical crystal blank processing technology, and in particular to a grinding structure for optical crystal blank processing. Background Technology

[0002] For example, Chinese patent CN217966379U discloses a grinding structure for processing optical crystal blanks. The servo motor is started to drive the rotating shaft to rotate. Under the transmission of the belt and pulley, the rotating rod on the right side rotates, causing the turntable to rotate. This pulls the two connecting plates and drives the mounting blocks to move relative to or away from each other. With the cooperation of the spring, the two moving plates move relative to or away from each other, thereby adjusting the distance between the two connecting rods and the clamping plate to fix blank crystals of different sizes.

[0003] The optical crystal blank processing mechanism in the above application uses clamping plates to hold and fix the optical crystal blank from both sides of the beam. However, since optical crystal blanks have different uses and various shapes, when clamping and fixing circular or irregularly shaped crystal blanks, the clamping plates can only clamp a point on the edge of the circular or irregularly shaped crystal, resulting in a small contact area. This easily leads to stress concentration, causing edge and corner damage and destroying the optical uniformity of the crystal. Furthermore, when it is necessary to grind the side of the crystal blank, the presence of the clamping plates makes it impossible to grind the side of the crystal, requiring repeated replacement of different clamps, which reduces the grinding efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a grinding structure for processing optical crystal blanks. It solves the technical problem that the side clamping method in existing technologies leads to stress concentration in the optical crystal blanks, causing edge and corner damage and destroying the optical uniformity of the crystals. It achieves the purpose of vacuum adsorption and fixation of optical crystal blanks, avoiding damage to the crystals due to clamping.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a grinding structure for processing optical crystal blanks, including a support frame mounted on a machine base, a grinding component mounted on the support frame for targeted grinding according to the position of the optical crystal blank, a mounting plate mounted on the machine base, a placement seat mounted on the mounting plate, a vacuum suction tube mounted on the placement seat, a vacuum suction cup mounted on the top of the vacuum suction tube for adsorbing and fixing the optical crystal blank, and a rotating mechanism for driving the vacuum suction tube to rotate.

[0006] A further improvement is that the vacuum suction cup has a lotus-shaped structure, and its top is a rubber pad with a certain degree of elasticity. The top of the vacuum suction cup has an arc-shaped structure. A main suction channel with a large diameter is opened at the center of the top of the vacuum suction cup and communicates with the vacuum suction tube. Multiple secondary suction channels with a smaller diameter are opened in a ring array outside the main suction channel, and a connecting tube is installed between the bottom of the secondary suction channels and the vacuum suction tube.

[0007] A further improvement is that the placement base has a vacuum passage that communicates with the vacuum suction tube, and a connecting suction tube is installed at the bottom of the vacuum passage. A vacuum pump is installed at the bottom of the connecting suction tube, and a dust removal component is installed on the connecting suction tube to remove any small amount of dust that may be accidentally sucked into the connecting suction tube.

[0008] A further improvement is that the dust removal assembly includes a dust removal pipe installed on the connecting suction pipe, a cyclone separator installed at the upper end of the inner wall of the dust removal pipe, an electrostatic adsorption ring installed in the middle of its outer side, an annular dust collection box installed along the inner wall of the dust removal pipe, and a filter mesh installed at the bottom of the inner wall of the dust removal pipe.

[0009] A further improvement is that the rotating mechanism includes a sealed bearing installed on the outside of the vacuum passage on the placement seat, and the vacuum suction tube is rotatably connected to the sealed bearing. A toothed ring is fitted on the vacuum suction tube, and a gear is meshed on the toothed ring. A drive motor for driving the gear to rotate is installed in the motor compartment on the placement seat.

[0010] A further improvement is that the grinding assembly includes multiple sets of moving components mounted on the base and support frame, and a mounting base is mounted on the vertical moving component on the support frame. A grinding motor is mounted on the mounting base, and the output end of the grinding motor is connected to the grinding head via a coupling.

[0011] By means of the above technical solution, this utility model provides a grinding structure for processing optical crystal blanks, which has at least the following beneficial effects:

[0012] 1. This utility model uses the vacuum suction force generated by the vacuum pump to firmly adsorb the crystal blank onto the vacuum chuck, avoiding damage to the edges and corners of the crystal blank caused by side clamping, which would affect its optical performance. In addition, the vacuum chuck has a certain degree of elasticity in the rubber pad with the arc surface structure on the top, which can better fit the arc surface of the crystal blank, increase the friction with the crystal blank, and thus improve the stability of adsorption.

[0013] 2. This utility model adopts a main suction channel and a secondary suction channel design on the vacuum suction cup. The main suction channel provides the main adsorption force to ensure that the central part of the crystal blank is firmly adsorbed, while the surrounding secondary suction channels form multiple adsorption points, which can make up for the problem of insufficient adsorption force of the main suction channel in the edge area of ​​the crystal blank, so that the adsorption force is more evenly distributed on the surface of the crystal blank and improves the overall adsorption stability.

[0014] 3. In this invention, when the dust-laden airflow passes through the cyclone separator, the dust is thrown towards the inner wall of the dust removal pipe under the action of centrifugal force. Then, the electrostatic adsorption ring is activated to adsorb and fix the dust thrown towards the inner wall of the dust removal pipe, thereby achieving dust separation of the dust-laden airflow and preventing dust from entering the vacuum pump and causing damage to the vacuum pump.

[0015] 4. This utility model drives a gear to rotate via a drive motor, which in turn drives a meshing gear ring to rotate, thereby causing the vacuum suction tube to rotate within a sealed bearing. This, in turn, causes the optical crystal blank adsorbed on the vacuum suction cup at the top of the vacuum suction tube to rotate. In conjunction with the grinding assembly, the side of the optical crystal blank is ground, eliminating the need for repeated fixture changes and improving grinding efficiency. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the placement base and its structure according to the present invention;

[0020] Figure 3 This is a cross-sectional view of the internal structure of the placement base of this utility model;

[0021] Figure 4 This is a cross-sectional view of the internal structure of the dust removal component of this utility model;

[0022] Figure 5 This is a schematic diagram of a partial independent structure of the grinding component of this utility model.

[0023] In the diagram: 1. Base; 2. Support frame;

[0024] 3. Grinding assembly; 31. Moving assembly; 32. Mounting base; 33. Grinding motor; 34. Grinding head;

[0025] 4. Mounting plate; 5. Placement base; 6. Vacuum suction tube; 7. Vacuum suction cup;

[0026] 8. Rotating mechanism; 81. Sealed bearing; 82. Gear ring; 83. Gear; 84. Drive motor;

[0027] 9. Main suction channel; 10. Secondary suction channel; 11. Connecting pipe; 12. Vacuum channel; 13. Connecting suction pipe; 14. Vacuum pump;

[0028] 15. Dust removal components; 151. Dust removal pipe; 152. Cyclone separator; 153. Electrostatic adsorption ring; 154. Annular dust collection box; 155. Filter mesh. Detailed Implementation

[0029] 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.

[0030] Example 1

[0031] Given that existing side-clamping techniques can lead to stress concentration in optical crystal blanks, causing edge and corner damage and compromising the optical uniformity of the crystal, this embodiment provides a grinding structure for processing optical crystal blanks. Please refer to... Figures 1-5 This embodiment provides a grinding structure for processing optical crystal blanks, which can vacuum-adsorb and fix the optical crystal blanks to avoid damage to the crystals due to clamping. The grinding structure for processing optical crystal blanks includes a support frame 2 mounted on a base 1, a grinding assembly 3 mounted on the support frame 2 for targeted grinding according to the position of the optical crystal blank, a mounting plate 4 mounted on the base 1, a placement seat 5 mounted on the mounting plate 4, a vacuum suction tube 6 mounted on the placement seat 5, a vacuum suction cup 7 mounted on the top of the vacuum suction tube 6 for adsorbing and fixing the optical crystal blank, and a rotating mechanism 8 provided on the vacuum suction tube 6 to drive its rotation.

[0032] The vacuum suction cup 7 has a lotus-shaped structure, and its top is a rubber pad with a certain degree of elasticity. The top of the vacuum suction cup 7 has an arc-shaped structure. A main suction channel 9 with a large diameter is opened at the center of the top of the vacuum suction cup 7, which communicates with the vacuum suction tube 6. Multiple secondary suction channels 10 with a smaller diameter are opened in a ring array on the outside of the main suction channel 9. A connecting tube 11 is installed between the bottom of the secondary suction channel 10 and the vacuum suction tube 6.

[0033] The placement seat 5 has a vacuum channel 12 that communicates with the vacuum suction tube 6, and a connecting suction tube 13 is installed at the bottom of the vacuum channel 12. A vacuum pump 14 is installed at the bottom of the connecting suction tube 13, and a dust removal component 15 is installed on the connecting suction tube 13 to remove a small amount of dust that may be accidentally sucked into the connecting suction tube 13.

[0034] A regular or irregularly shaped crystal blank is placed in the center of the vacuum chuck 7. Then, the vacuum pump 14 is activated. The vacuum suction force is transmitted through the connecting pipe 13 to the vacuum channel 12, and then through the vacuum pipe 6 to the vacuum chuck 7, thus firmly adsorbing the crystal blank onto the vacuum chuck 7. This avoids damage to the edges and corners of the crystal blank caused by side clamping, which would affect its optical performance. Furthermore, the curved rubber pad on the top of the vacuum chuck 7 has a certain degree of elasticity, allowing it to better conform to the curved surface of the crystal blank, increasing the friction between the two and thus improving the stability of the adsorption. Furthermore, the vacuum chuck 7 adopts a design of main suction channel 9 and secondary suction channel 10. The main suction channel 9 provides the main adsorption force to ensure that the center of the crystal blank is firmly adsorbed, while the surrounding secondary suction channels 10 form multiple adsorption points. The combination of the two optimizes the airflow distribution within the vacuum chuck 7, forming a stable airflow field. This can compensate for the insufficient adsorption force of the main suction channel 9 in the edge area of ​​the crystal blank, making the adsorption force more evenly distributed on the surface of the crystal blank, and improving the overall adsorption stability. It also reduces the risk of the crystal blank shifting due to uneven adsorption force or falling off due to grinding force.

[0035] The grinding assembly 3 includes multiple sets of moving components 31 mounted on the base 1 and the support frame 2. The vertical moving component 31 on the support frame 2 is equipped with a mounting base 32, and the mounting base 32 is equipped with a grinding motor 33. The output end of the grinding motor 33 is connected to the grinding head 34 through a coupling. The moving components 31 are all driven by the motor to rotate the lead screw, which in turn drives the slide on the lead screw to move. Thus, the moving component 31 mounted on the base 1 drives the placement seat 5 to move back and forth, thereby realizing the movement and adjustment of the front and back position of the optical crystal blank. In conjunction with the moving component 31 mounted on the support frame 2, the grinding head 34 is moved left and right to facilitate the angle adjustment grinding of the optical crystal blank. In addition, the vertical moving component 31 mounted on the left and right moving component 31 adjusts the height of the grinding head 34 to adapt to optical crystal blanks of different thicknesses.

[0036] Example 2

[0037] During the adsorption process, some dust generated during grinding may enter the connecting suction tube 13 through the adsorption channel, and then enter the vacuum pump 14, causing damage to the vacuum pump 14. Therefore, based on Example 1, as follows... Figures 1-5As shown, the device also includes a dust removal assembly 15, which includes a dust removal pipe 151 installed on the connecting suction pipe 13. A cyclone separator 152 is installed at the upper end of the inner wall of the dust removal pipe 151, and an electrostatic adsorption ring 153 is installed in the middle of its outer side. An annular dust collection box 154 is installed along the inner wall of the dust removal pipe 151, and a filter mesh 155 is installed at the bottom of the inner wall of the dust removal pipe 151. When dust enters the dust removal pipe 151, the dust-laden airflow passes through the cyclone separator 152, and the dust is thrown towards the inner wall of the dust removal pipe 151 under the action of centrifugal force. Then, the electrostatic adsorption ring 153 is activated to adsorb and fix the dust thrown towards the inner wall of the dust removal pipe 151, thereby achieving dust separation of the dust-laden airflow and preventing dust from entering the vacuum pump 14 and causing damage to the vacuum pump 14. As the vacuum pump 14 generates continuous suction, the dust is gradually drawn into the annular dust collection box 154 installed at the bottom of the inner wall of the dust removal pipe 151 for collection. The dust removal pipe 151 can be removed periodically for cleaning. In addition, a filter mesh 155 is also provided at the bottom of the dust removal pipe 151 to perform secondary filtration and interception of dust that may escape.

[0038] Example 3

[0039] Since optical crystal blanks often require roughing of their edges during the grinding process, based on Example 2, as... Figures 1-5 As shown, the device also includes a rotating mechanism 8, which includes a sealed bearing 81 mounted on the outside of the vacuum channel 12 opened on the placement base 5. The vacuum suction tube 6 is rotatably connected to the sealed bearing 81. A toothed ring 82 is fitted on the vacuum suction tube 6, and a gear 83 is meshed on the toothed ring 82. A drive motor 84 is installed in the motor compartment opened on the placement base 5 to drive the gear 83 to rotate. When the drive motor 84 is started, it drives the gear 83 to rotate, which in turn drives the toothed ring 82 to rotate, thereby driving the vacuum suction tube 6 to rotate in the sealed bearing 81. This, in turn, drives the optical crystal blank adsorbed on the vacuum suction cup 7 at the top of the vacuum suction tube 6 to rotate. In conjunction with the grinding assembly 3, the side of the optical crystal blank is ground, eliminating the need to repeatedly change the fixture and improving the grinding efficiency.

[0040] It should be noted that, in this document, 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.

[0041] 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 grinding structure for processing optical crystal blanks, comprising a support frame (2) mounted on a base (1), characterized in that: The support frame (2) is equipped with a grinding assembly (3) for targeted grinding based on the position of the optical crystal blank. The base (1) is equipped with a mounting plate (4), the mounting plate (4) is equipped with a placement seat (5), the placement seat (5) is equipped with a vacuum suction tube (6), the top of the vacuum suction tube (6) is equipped with a vacuum suction cup (7) for adsorbing and fixing the optical crystal blank, and the vacuum suction tube (6) is equipped with a rotating mechanism (8) to drive it to rotate.

2. The grinding structure for processing optical crystal blanks according to claim 1, characterized in that: The vacuum suction cup (7) has a lotus-shaped structure and its top is a rubber pad with a certain elasticity. The top of the vacuum suction cup (7) has an arc-shaped structure. A main suction channel (9) with a larger diameter is opened at the center of the top of the vacuum suction cup (7) and communicates with the vacuum suction tube (6). Multiple secondary suction channels (10) with smaller diameter are opened in a ring array on the outside of the main suction channel (9). A connecting tube (11) is installed between the bottom of the secondary suction channel (10) and the vacuum suction tube (6).

3. The grinding structure for processing optical crystal blanks according to claim 1, characterized in that: The placement seat (5) has a vacuum passage (12) that communicates with the vacuum suction tube (6), and a connecting suction tube (13) is installed at the bottom of the vacuum passage (12). A vacuum pump (14) is installed at the bottom of the connecting suction tube (13), and a dust removal component (15) is installed on the connecting suction tube (13) to remove a small amount of dust that is accidentally sucked into the connecting suction tube (13).

4. The grinding structure for processing optical crystal blanks according to claim 3, characterized in that: The dust removal assembly (15) includes a dust removal pipe (151) installed on the connecting suction pipe (13). A cyclone separator (152) is installed on the upper end of the inner wall of the dust removal pipe (151), and an electrostatic adsorption ring (153) is installed on the middle of its outer side. An annular dust collection box (154) is installed on the inner wall of the dust removal pipe (151), and a filter mesh (155) is installed at the bottom of the inner wall of the dust removal pipe (151).

5. The grinding structure for processing optical crystal blanks according to claim 1, characterized in that: The rotating mechanism (8) includes a sealed bearing (81) installed on the outside of the vacuum passage (12) opened on the placement seat (5), and the vacuum suction tube (6) is rotatably connected in the sealed bearing (81). A toothed ring (82) is sleeved on the vacuum suction tube (6), and a gear (83) is meshed on the toothed ring (82). A drive motor (84) for driving the gear (83) to rotate is installed in the motor compartment opened on the placement seat (5).

6. The grinding structure for processing optical crystal blanks according to claim 1, characterized in that: The grinding assembly (3) includes multiple sets of moving components (31) mounted on the base (1) and the support frame (2), and a mounting base (32) is mounted on the vertical moving component (31) on the support frame (2). A grinding motor (33) is mounted on the mounting base (32), and the output end of the grinding motor (33) is connected to a grinding head (34) through a coupling.

Images