High-precision mass production grinding and polishing device

Abstract

The utility model discloses a high-precision mass production grinding and polishing device. The high-precision mass production grinding and polishing device comprises a grinding and polishing clamping die and a ball die base body. The grinding and polishing clamping die and the ball die base body are detachably installed on a polishing machine or a fine grinding machine respectively. The machining face of the grinding and polishing clamping die is matched with the machining face of the ball die base body. A plurality of mounting positions are arranged on the machining surface of the grinding and polishing clamping die; a stacked adsorption pad and a to-be-processed lens are accommodated in the mounting position; a polishing cushion layer is attached to the machining face of the ball mold base body. The device can be used for accurate grinding process machining of optical lenses and can also be used for polishing process machining, at least two optical lenses can be machined at the same time in the accurate grinding stage and the polishing stage through one device, at least 6-12 small parts can be machined at the same time, the machining efficiency is improved, and the machining cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of optical device production, and in particular to a high-precision batch production grinding and polishing device. Background Art

[0002] High-precision optical lenses are widely used in aerospace, navigation, aviation, weapons and other national defense and civilian science and technology industrial systems. They are the core components of optical imaging systems. With the development of related industrial technology fields, the demand for high-performance optical lenses is increasing day by day.

[0003] At present, the grinding and polishing of optical parts adopts the production mode of piece-by-piece processing, which can no longer meet the mass production needs of customers and the market. In addition, the individual differences and poor consistency of single-piece processing result in the need for separate debugging of each optical system. The debugging time is too long and customer satisfaction is low.

[0004] Each processing spindle of the existing grinding and polishing equipment can only grind and polish a single part at a time, and after grinding, it needs to be disassembled for manual cleaning and then polished, which has low processing efficiency. It is precisely because the fine grinding and polishing need to be disassembled and then processed on the fixture that the consistency of the processed lenses is poor. The existing equipment used to solve the above problems has complex structures, high cost investment, and difficulty in disassembling and assembling lenses. It is also impossible to improve the consistency of lens processing and reduce the effect of lens processing errors. For example, CN202211479587.X is a fine grinding and polishing device for optical lenses.

[0005] The information disclosed in the background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in the field. Utility Model Content

[0006] In response to the above technical problems, the present application provides a high-precision mass production grinding and polishing device, which realizes mass production and streamlined operation of optical parts on the grinding and polishing equipment, while improving the processing quality and consistency of the products and reducing the error of processed lenses.

[0007] The present application provides a high-precision mass production grinding and polishing device, comprising: a grinding and polishing clamping die and a ball mold base; the grinding and polishing clamping die and the ball mold base are respectively detachable and installed on a polishing machine or a fine grinding machine;

[0008] The grinding and polishing clamping die processing surface matches the processing surface of the ball mold base;

[0009] A plurality of mounting positions are arranged on the processing surface of the grinding and polishing clamping die; the mounting positions contain the stacked adsorption pads and the lenses to be processed; a polishing pad layer is attached to the processing surface of the ball mold base;

[0010] A gap is left between the processing surface of the lens to be processed and the polishing pad layer; the gap is filled with operating fluid.

[0011] Preferably, the processing surface of the grinding and polishing clamp is a concave surface; and the processing surface of the ball mold base is a convex surface.

[0012] Preferably, the mounting position is a groove.

[0013] Preferably, spherical grooves are symmetrically arranged at the edges of the groove.

[0014] Preferably, the grinding and polishing clamp comprises: a fixed installation groove and a body; the top surface of the body is a plane; the fixed installation groove is arranged on the plane; the grinding and polishing clamp is installed on the polishing machine or fine grinding machine by removing the installation groove.

[0015] Preferably, the mounting position is axially symmetrically arranged on the processing surface around the central axis of the body.

[0016] Preferably, the mounting positions are symmetrically arranged with the body radius as the symmetry axis.

[0017] Preferably, the ball mold base comprises: a mounting rod and a body; a plane is arranged on the bottom surface of the body; the mounting rod is arranged on the plane; the ball mold base is installed on a polishing machine or a fine grinding machine by removing the mounting groove through the mounting rod.

[0018] Preferably, the body is a 2AT12 aluminum alloy body.

[0019] Preferably, the polishing pad is a polyurethane polishing pad.

[0020] The beneficial effects of this application include:

[0021] 1) The high-precision mass production grinding and polishing device provided in this application is designed based on the characteristics of existing grinding and polishing equipment, fully considering the actual characteristics and technical requirements of commonly used optical parts grinding and polishing equipment. It has been completed after multiple design improvements and has been put into actual mass production.

[0022] 2) The high-precision mass production grinding and polishing device provided in this application can be used for both the fine grinding process and the polishing process of optical lenses. One device can be used to process at least 2 optical lenses at the same time during the fine grinding and polishing stages. For small parts, at least 6 to 12 parts can be processed at the same time, thereby improving processing efficiency and reducing processing costs. Using the same clamping die, simultaneous processing can be completed quickly under the same process conditions to ensure the consistency of fine grinding and polishing of parts in the same batch. Moreover, after the fine grinding process is completed, the parts can be installed on the clamping die at the processing position for cleaning. After cleaning, they can be directly polished on the polishing equipment, saving the time of loading and unloading parts. Further improve processing efficiency.

[0023] 3) The high-precision mass production grinding and polishing device provided in this application, multiple devices are used in combination for fine grinding and polishing (rough polishing, fine polishing and felt polishing), which can realize the streamlined operation of fine grinding and polishing, save a lot of manpower time, and do not need to replace the fixture, which is conducive to reducing the processing error of parts, ensuring the processing consistency, and saving the grinding and polishing auxiliary materials used for fine grinding and polishing: corundum and polishing liquid.

[0024] 4) The high-precision mass production grinding and polishing device provided in this application is particularly suitable for processing meniscus lenses. After processing meniscus lenses using this device, the resulting lenses have high consistency and small errors, and can be installed once to complete fine grinding, cleaning, and polishing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the size of the lens to be processed in the embodiment of the present application;

[0026] Figure 2 Schematic diagram of the grinding and polishing clamp structure provided in this application; a) bottom view; b) AA section view of Figure a;

[0027] Figure 3 This is a schematic diagram of the main structure of the ball mold base provided in this application;

[0028] Legend:

[0029] Grinding and polishing clamp 1, mounting position 12, spherical slot 13, fixed mounting slot 14, spherical mold base 2, grinding surface 21, mounting rod 22. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0032] The technical means that are not described in detail in this application and are not used to solve the technical problems of this application are all set according to the common knowledge in the field, and can be implemented in a variety of common knowledge settings.

[0033] In this embodiment, the parts to be processed are as follows Figure 1 As shown, the technical solution of the present invention is illustrated by taking the efficient grinding and polishing of the concave surface of a meniscus lens as an example. The lens has an aperture of Φ20mm, a center thickness of 4mm, one surface is a concave surface with a curvature radius of 100mm, and the second surface is a convex surface with a curvature radius of 56mm. The surface shape requires aperture N=4, ΔN=0.3. Taking the polishing of one surface of the lens as an example, the design, manufacture and use of the grinding and polishing device of the present invention are illustrated.

[0034] The grinding and polishing clamp 1 adopts a concave spherical structure and uses a clamp with 6 parts mounting positions 12. The main cross-sectional view of the clamp is as follows Figure 2 As shown, the clamp has a diameter of 70 mm, an overall thickness of 15 mm, a diameter of the mounting position 12 of 20 mm, and a center distance of 44 mm between two mounting positions 12 on the same radius. The six mounting positions 12 are symmetrically distributed relative to the central axis of the clamp. A fixed mounting groove 14 is provided on the top surface of the grinding and polishing clamp 1, and the fixed mounting groove 14 is used to realize the installation connection with the polishing machine or fine grinding machine.

[0035] The bottom curvature radius of each mounting position 12 is 56mm, and the mounting position 12 is symmetrical with the radius line of the clamp on the mounting position 12 as the axis of symmetry. The edge thickness of the lens to be processed is 3.5mm, and an adsorption pad of 18mm (diameter) * 0.5mm (thickness) is used. The edge of the part requires a mounting position 12 height of 2.0mm, the edge of the part is clamped by 1.5mm, and the edge thickness of the mounting position 12 (excluding the adsorption pad) is 2.0mm. The curvature radius of the clamp is calculated to be 102mm.

[0036] Ball mold base 2 Figure 3 The ball mold base 2 is made of 2AT12 aluminum alloy, with a diameter of 120 mm and a curvature radius of 99.5 mm. The convex surface is a grinding surface 21, on which a polishing pad with a thickness of 0.5 mm is arranged. The polishing pad is a polyurethane polishing pad or felt. The ball mold base 2 is processed by CNC turning, with a surface roughness of 0.4 and a surface runout of 0.15 relative to the center axis. The polishing pad is bonded to the ball mold base 2 with epoxy glue. The upper plane of the other side of the ball mold base 2 opposite to the convex surface is provided with a mounting rod 22 at the center axis of the plane, and the mounting rod 22 is used to realize the disassembly connection between the ball mold base 2 and the polishing machine or fine grinding machine for processing.

[0037] After the lens is fixed in the mounting position 12 of the clamping mold, fine grinding and high-efficiency polishing can be performed. It is only necessary to replace the polishing ball mold with a fine grinding ball mold (the curvature radius of the fine grinding ball mold surface is the same as the surface to be finely ground). The polishing operation is performed by relatively rotating the polishing pad or felt (the curvature radius of the polishing ball mold needs to consider the thickness of the polishing pad and felt when making the polishing ball mold) in contact with the lens. Specific auxiliary materials are selected according to specific operations. The corresponding auxiliary materials for fine grinding and polishing are also different, which are determined according to specific process conditions.

[0038] In this embodiment, the high-precision mass production grinding and polishing device is used to perform the grinding and polishing operation, including the following steps:

[0039] Step 1: Clean the surface of the clamping mold and the base, especially the inner bottom of the groove of the installation position 12, and then dry them in the air or put them in a constant temperature oven and dry them at a suitable temperature;

[0040] Step 2: According to the design requirements, glue the circular adsorption pad with a diameter of 18*0.5mm to the bottom of the groove of the installation position 12, and press it with your hands to ensure that it is firmly bonded;

[0041] Step 3, place the bonding surface of the part to be polished inward on the surface of the adsorption pad above the mounting position 12, exhaust the air between the bonding surface and the surface of the adsorption pad, and use air pressure to achieve the bonding of the part on the mounting position 12, and the surface of the lens to be polished is set outside the mounting position 12;

[0042] Step 4: Adhere a 0.5 mm thick polyurethane polishing pad to the convex surface of the ball mold base 2 with epoxy glue according to the mold size and process requirements, press the surface of the polishing pad with a tool or hand to ensure that the polishing pad is firmly bonded to the surface of the ball mold, and wait for the adhesive to cure before use;

[0043] Step 5: Install the prepared ball mold base 2 on the main shaft of the polishing machine and rotate it back and forth several times by hand to ensure that it is firmly installed;

[0044] Step 6: Install the clamping mold with the installed parts on the polishing equipment and place it so that the surface of the lens to be processed faces the convex surface of the ball mold base 2. Gently turn it back and forth several times by hand to confirm that the surface of the polished part and the surface of the ball mold base 2 are in contact and consistent;

[0045] Step 7, open the valve of the polishing liquid, add the pre-prepared polishing liquid between the part to be polished and the polishing pad through the polishing machine, and start polishing after setting the equipment process parameters on the polishing machine;

[0046] Step nine, after the polishing work is completed, blow compressed air into the spherical groove 13 on the side of the installation position 12. When the air pressure between the bonding surface in the installation position 12 and the lens is the same as the atmospheric pressure, carefully remove the parts by hand, clean the surface of the clamping mold, and prepare to install the next batch of parts to be polished.

[0047] Among them, if several identical clamps are prepared and the parts to be processed are pre-installed, after polishing a group of parts, another clamp can be directly installed and polishing can be started. During the polishing process, the polished parts on the previous clamp can be removed, and then the next parts can be prepared and installed on the clamp, so as to make full use of the processing interval time to realize batch flow operation.

[0048] Step 7 can be skipped for fine-ground lenses. After fine-ground processing, the clamping mold and part surface can be cleaned and directly mounted on the polishing equipment for polishing, thus achieving in-situ processing connection between fine-ground and polishing, improving production efficiency, ensuring product consistency, and reducing the error of the processed lenses.

[0049] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-precision mass production grinding and polishing device, characterized in that: include: Grinding and polishing clamps, ball mold base; Grinding and polishing clamps, ball mold base are disassembled and installed on polishing machines or fine grinding machines respectively; The grinding and polishing clamping die processing surface matches the processing surface of the ball mold base; A plurality of mounting positions are arranged on the processing surface of the grinding and polishing clamping die; the mounting positions contain the stacked adsorption pads and the lenses to be processed; a polishing pad layer is attached to the processing surface of the ball mold base; A gap is left between the processing surface of the lens to be processed and the polishing pad layer; the gap is filled with operating fluid.

2. The high-precision mass production grinding and polishing device according to claim 1 is characterized in that: The machining surface of the grinding and polishing clamp is concave; the machining surface of the ball mold base is convex.

3. The high-precision mass production grinding and polishing device according to claim 1, characterized in that: The mounting position is a groove.

4. The high-precision mass production grinding and polishing device according to claim 3 is characterized in that: Spherical grooves are symmetrically arranged at the edge of the groove.

5. The high-precision mass production grinding and polishing device according to claim 1 is characterized in that: The grinding and polishing clamp comprises: a fixed installation groove and a body; the top surface of the body is a plane; the fixed installation groove is arranged on the plane; the grinding and polishing clamp is installed on a polishing machine or a fine grinding machine by disassembling the installation groove.

6. The high-precision mass production grinding and polishing device according to claim 5, characterized in that: The mounting position is axially symmetrically arranged on the processing surface around the central axis of the body.

7. The high-precision mass production grinding and polishing device according to claim 5, characterized in that: The installation position is symmetrically arranged with the body radius as the symmetry axis.

8. The high-precision mass production grinding and polishing device according to claim 1, characterized in that: The ball mold base comprises: a mounting rod and a body; a plane is arranged on the bottom surface of the body; the mounting rod is arranged on the plane; the ball mold base is installed on a polishing machine or a fine grinding machine by disassembling the mounting groove through the mounting rod.

9. The high-precision mass production grinding and polishing device according to claim 8, characterized in that: The body is made of 2AT12 aluminum alloy.

10. The high-precision mass production grinding and polishing device according to claim 1, characterized in that: The polishing pad is a polyurethane polishing pad.

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