CN220296706U - A kind of double-sided grinding equipment for optical cover with large aspect ratio - Google Patents

Abstract

The utility model discloses a double-sided grinding equipment for a large aspect ratio optical cover, which includes a screw guide rail transmission mechanism, a central water outlet electric spindle, an adjustable clamp, a supporting tile seat and a porous grinding tool. The adjustable clamp Used to fix the optical cover body, the screw guide rail transmission mechanism has a left-right symmetrical structure, the number of the central water and electric spindles is 2, and they are respectively arranged on both sides of the screw guide rail transmission mechanism and through the support The tile seat provides support, the porous grinding tool is arranged on the central water outlet electric spindle, and the adjustable clamp is arranged in the middle part of the screw guide rail transmission mechanism.

Description

A kind of double-sided grinding equipment for optical cover with large aspect ratio

Technical field

The utility model relates to an automated grinding equipment, in particular to a double-sided grinding equipment for a large aspect ratio optical cover.

Background technique

At present, there are mature processing methods for optical covers, which are mainly for the processing of regular surfaces such as planes and spheres. However, traditional grinding, polishing, shaping and other processes are difficult to meet the precision processing of optical covers with large aspect ratios, as shown below. picture. In recent years, the processing technology of optical covers with large aspect ratios has received much attention, but at the same time many new problems have emerged. At present, there are many mature processing technologies at home and abroad. For example, the OptiPro Systems company in the United States is at the world's leading level in the field of complex optical element processing technology such as aspheric surfaces and free-form surfaces. The company is innovating in the processing of large aspect ratio optical covers. The belt grinding and belt polishing process are adopted comprehensively, and the processing of the optical cover with a large aspect ratio is completed through the final surface modification and polishing. The existing domestic technology for processing the optical cover with a large aspect ratio is precision grinding. , Single-point diamond turning combined with precision polishing. However, the current processing technology for optical covers with large aspect ratios generally has problems such as low efficiency and insufficient chip tolerance, which will restrict their use in actual production.

Utility model content

In view of the above problems, the present utility model relates to a double-sided grinding equipment for an optical cover with a large aspect ratio.

In order to achieve the above purpose, the present utility model provides the following technical solution: a double-sided grinding equipment for a large aspect ratio optical cover, including a screw guide rail transmission mechanism, a central water outlet electric spindle, an adjustable clamp, a supporting tile seat and a porous grinding machine. cutting tool, the adjustable clamp is used to fix the optical cover, the screw guide rail transmission mechanism has a left-right symmetrical structure, the number of the center water outlet electric spindles is 2 and they are respectively arranged on the screw guide rail transmission mechanism and are supported by the supporting tile seats, the porous grinding tool is arranged on the central water outlet electric spindle, the adjustable clamp is arranged in the middle of the screw guide rail transmission mechanism, the screw rod The guide rail transmission mechanism includes a symmetrically arranged servo motor, a coupling, a screw rod and a guide rail. One end of the screw rod is a fixed end of the screw rod and the other end is a supporting end of the screw rod. The output end of the servo motor passes through the coupling. The device is connected to the screw fixed end of the screw, the screw support end of the screw guide rail transmission mechanism is provided with the support tile, and the servo motor drives the screw to drive along the guide rail. The porous grinding tool is driven to grind the optical cover body on both sides.

Preferably, the screw rod is passed through the nut sleeve, and the screw guide rail transmission mechanism is controlled by a servo motor. The coupling transmits power to the screw rod, driving the nut sleeve for transmission, and changes the rotation speed of the servo motor. To control the bidirectional feed speed of the nut sleeve.

Preferably, the center water-output electric spindle includes a grinding fluid inlet, a grinding fluid injection port, a water-cooling inlet and a water-cooling outlet. The grinding fluid is injected through the grinding fluid inlet, and finally the center water-output electric spindle and the porous grinding tool are connected. The grinding fluid injection port at the connection is ejected to ensure that the grinding fluid flows into the grinding tool; at the same time, water is circulated and cooled around the central water-outlet electric spindle through the water-cooling inlet and water-cooling outlet.

Preferably, the adjustable clamp includes a cylinder, a moving plate, a V-shaped block and a flexible gasket. The adjustable clamp is arranged inside the middle bracket of the screw guide rail transmission mechanism, and the distance is adjusted by controlling the moving plate through the cylinder. There is a flexible gasket inside the V-shaped block to prevent damage to the optical cover during clamping processing.

Preferably, a two-component silicone glue can be coated on the inside of the flexible gasket for placing the optical cover to rotate in the X-axis direction during processing.

Preferably, the supporting tile base includes an upper part of the tile base and a lower part of the tile base. The upper part of the tile base and the lower part of the tile base are arched and surround the supported structure, and are connected by bolts and fixed seats. Fixed connection.

Preferably, the porous grinding tool includes a porous outer surface grinding tool and a porous inner surface grinding tool, wherein the porous outer surface grinding tool is disposed on the center outlet electric spindle on one side and the porous inner surface grinding tool is disposed on the other side. The water and electricity spindle comes out of the center of one side.

Preferably, the porous grinding tool is prepared using laser selective melting technology. The bonding agent used is CuSn20 with a particle size of 50 microns, and the abrasive grains are diamond with a particle size of 20 microns.

Preferably, the porous grinding tool has a porous structure, the porous structure is a porous unit cell structure, and is limited to a minimal curved surface structure, the cell size of the porous unit cell structure is 2 mm, and the porosity is 50% - 80%.

Preferably, the length-to-diameter ratio L/R of the ground optical cover ranges from 1 to 3.

The utility model has the following beneficial effects: The utility model can quickly reduce the surface roughness of the inner and outer surfaces of the optical cover through simultaneous and efficient grinding of the optical cover, and greatly improves the grinding quality and processing efficiency of the optical cover.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the drawings required for the implementation will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model. Therefore, it should not be regarded as limiting the scope. For those skilled in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a three-dimensional schematic diagram of a double-sided grinding equipment for a large aspect ratio optical cover proposed in the utility model patent.

Figure 2 is a three-dimensional schematic diagram of the screw guide rail transmission mechanism proposed in the utility model patent.

Figure 3 is a three-dimensional schematic diagram of the center-outlet water-electric spindle proposed in the utility model patent.

Figure 4 is a three-dimensional schematic view of the adjustable clamp proposed by the utility model patent.

Figure 5 is a three-dimensional schematic view of the supporting tile seat proposed by the utility model patent.

Figure 6 is a three-dimensional schematic view of the porous grinding tool proposed by the utility model patent.

In the picture: 1-screw guide transmission mechanism, 2-center water outlet electric spindle, 3-adjustable clamp, 4-support tile seat, 5-porous grinding tool, 6-servo motor, 7-coupling, 8- Screw fixed end, 9-nut sleeve, 10-screw, 11-screw support end, 12-bearing, 13-guide rail, 14-grinding fluid inlet, 15-water cooling inlet, 16-water cooling outlet, 17-grinding Cutting fluid injection port, 18-cylinder, 19-moving plate, 20-V-shaped block, 21-flexible gasket, 22-upper part of tile seat, 23-lower part of tile seat, 24-porous outer surface grinding tool, 25-porous Internal surface grinding tools.

Detailed ways

In order to make the purpose, technical solutions and advantages of the implementation of the present utility model more clear, the technical solutions in the implementation of the present utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the present utility model. Obviously, the description The embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by a person skilled in the art without any creative efforts shall fall within the scope of protection of the present utility model. Therefore, the following detailed description of embodiments of the invention provided in the appended drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the invention. Based on the embodiments of the present utility model, all other embodiments obtained by a person skilled in the art without any creative efforts shall fall within the scope of protection of the present utility model.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", The directions indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" etc. Or the positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the equipment or components referred to must have a specific orientation, be constructed in a specific orientation, and operation, therefore it cannot be construed as a limitation of the present invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically limited.

In this utility model, unless otherwise expressly stipulated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly stipulated and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features being in direct contact with each other. Features are not in direct contact but through other features between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

Example

The following are only preferred embodiments of the present utility model. The protection scope of the present utility model is not limited to the following embodiments. All technical solutions falling under the idea of the present utility model belong to the protection scope of the present utility model.

Refer to Figures 1-2 of the manual, a double-sided grinding equipment for a large aspect ratio optical cover, including a screw guide rail transmission mechanism 1, a central water outlet electric spindle 2, an adjustable clamp 3, a supporting shoe 4 and a porous grinding Tool 5. The adjustable clamp 3 is used to fix the optical cover. The screw guide rail transmission mechanism 1 has a left-right symmetrical structure. The number of the central water and electric spindles 2 is 2 and they are respectively arranged on the screw guide rail. Both sides of the transmission mechanism 1 are supported by the support tiles 4, the porous grinding tool 5 is provided on the central water outlet electric spindle 2, and the adjustable clamp 3 is provided on the screw guide rail transmission In the middle of the mechanism 1, the screw guide rail transmission mechanism 1 includes a servo motor 6, a coupling 7, a screw 10 and a guide rail 13 arranged symmetrically on the left and right. The screw is inserted into the nut sleeve 9. The rod guide rail transmission mechanism 1 controls the transmission through the servo motor 6, and the coupling 7 transmits power to the screw rod 10, driving the nut sleeve 9 for transmission, and controls the bidirectional feed speed of the nut sleeve 9 by changing the rotation speed of the servo motor 6; One end of the screw 10 is a screw fixed end 8 and the other end is a screw support end 11. The output end of the servo motor 6 is connected to the screw fixed end 8 of the screw 10 through a coupling 7. The support shoe 4 is provided on the screw support end 11 of the screw guide rail transmission mechanism, and the servo motor 6 drives the screw 10 to drive along the guide rail 13 to drive the porous grinding Tool 5 performs double-sided grinding of the optical cover. There is a rectangular platform in the middle of the guide rail for placing the adjustable fixture 3. At the same time, there is a grinding fluid collection hole on the guide rail 13 for collecting grinding fluid. The rectangular platform is cut at a certain inclination angle to facilitate the collection of grinding fluid. , the selection of the device can be carried out according to the required conditions, and finally collected by the drainage hole on the side.

Referring to Figure 3 of the description, the central electric spindle 2 includes a grinding fluid inlet 14, a water cooling inlet 15, a water cooling outlet 16 and a grinding fluid injection port 17. The central water-outlet electric spindle 2 is connected to the nut sleeve 9 on the screw guide rail transmission part 1 through the supporting shoe 4, and is driven by the servo motor 6 to move; the water-cooling inlet 15 and the water-cooling outlet 16 are connected to water pipes to transport cooling water, and the process is completed The motor itself is cooled; similarly, the grinding fluid inlet will be connected to the grinding fluid supply pipe, and the grinding fluid injection port 17 will be sprayed to the porous grinding tool 5.

Referring to Figure 4 of the description, the adjustable clamp 3 includes a cylinder 18, a moving plate 19, a V-shaped block 20 and a flexible gasket 21. The above-mentioned adjustable clamp is connected to the inside of the large bracket, and is equipped with a cylinder 18 to control the moving plate 19. To adjust the distance, a flexible gasket 21 is provided inside the V-shaped block 20 to prevent damage to the optical cover during clamping. At the same time, two-component silicone glue can be applied inside the flexible gasket 21 to prevent the optical cover from being damaged. Rotation occurs in the X-axis direction during processing to improve grinding efficiency.

Referring to Figure 5 of the description, the supporting tile base 4 includes: an upper portion 22 of the tile base and a lower portion 23 of the tile base. The upper part 22 and the lower part 23 of the tile base are arched and surround the supported structure, and are fixedly connected through bolts and fixed seats. The above-mentioned supporting tile base is fixedly connected with the nut sleeve 9 with screws, and at the same time, the center outlet water and electricity spindle 2 realizes movement through the supporting tile base 4.

Referring to Figure 6 of the description, the porous grinding tool 5 includes a porous outer surface grinding tool 24 and a porous inner surface grinding tool 25. The outer surface grinding tool of the above-mentioned porous grinding tool is connected at the grinding fluid injection port 17 of the central water outlet electric spindle 2, and the porous inner surface grinding tool is connected to the grinding fluid injection port 17 of the center water outlet electric spindle 2 on the other side. connection, when in use, the two central water-outgoing electric spindles 2 are controlled to rotate in opposite directions, thereby allowing the inner and outer surface grinding tools to grind the optical cover body in reverse directions, thereby improving grinding efficiency. The porous grinding tool 5 is difficult to achieve with traditional processing methods due to its complex structure, so it is prepared using laser selective melting technology. The bonding agent used is CuSn20 with a particle size of 50 microns, and the abrasive grains are diamond with a particle size of 20 Micron. When in use, the grinding fluid flows from the inside of the grinding tool to the processing surface, which can quickly remove grinding debris, reduce the temperature of the grinding surface, and prevent tool clogging. Since long-term use of diamond abrasive grains will cause the sharp parts to become dull, and the hardness of diamond abrasive grains is very high, the longer the use time, the higher the processing accuracy will be. For the porous grinding tool 5, after performing an industrial CT scan on the optical cover, the tool size is adapted through Boolean operations, and an adapted porous grinding tool is finally designed to process the optical cover. At present, the technical indicators of optical mask processing can be determined according to actual needs. Since the porous grinding tools are prepared using selective selective melting technology, both specifications and accuracy can be guaranteed. The porous structure of the porous grinding tool 5 is mainly reflected in the design of the porous unit cell structure, which is limited to a minimal curved surface structure, the cell size is 2 mm, and the porosity is 50%-80%. The characteristics of the selected minimal curved surface are that the specific surface area of this structure is relatively large, and the grinding fluid can fully flow. The unit cell size and porosity are limited to facilitate internal powder cleaning after the structure is printed. This design enables the porous grinding tool to have sufficient space for coolant circulation and allows the wear debris to flow away from the holes. At the same time, the pores of the porous structure can be freely adjusted according to the size of the wear debris and the requirements for the coolant circulation space. Design unit cell structure.

The above embodiments are only for illustrating the technical concepts and characteristics of the present invention. Their purpose is to enable those familiar with the technology to understand the contents of the present invention and implement them accordingly. They cannot limit the scope of protection of the present invention. All equivalent changes or modifications based on the spirit and essence of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A double-sided grinding equipment for an optical cover with a large aspect ratio, which is characterized in that it includes a screw guide rail transmission mechanism, a central water outlet electric spindle, an adjustable fixture, a supporting shoe and a porous grinding tool. The adjustable The clamp is used to fix the optical cover. The screw guide rail transmission mechanism has a left-right symmetrical structure. The number of the central water and electric spindles is 2 and they are respectively arranged on both sides of the screw guide rail transmission mechanism and pass through the The supporting tile seat provides support, the porous grinding tool is arranged on the central water outlet electric spindle, the adjustable clamp is arranged in the middle of the screw guide rail transmission mechanism, and the screw guide rail transmission mechanism includes left and right symmetrical arrangements. Servo motor, coupling, screw rod and guide rail, one end of the screw rod is the screw rod fixed end, the other end is the screw rod support end, the output end of the servo motor is connected to the screw rod through a coupling The screw rod fixed end, the screw rod support end of the screw guide rail transmission mechanism is provided with the support tile seat, and the servo motor drives the screw rod to drive along the guide rail and then drives the porous grinding tool Double-sided grinding of the optical cover. 2. The double-sided grinding equipment of a large aspect ratio optical cover according to claim 1, characterized in that the screw rod is inserted into the nut sleeve, and the screw guide rail transmission mechanism is controlled by a servo motor. , the coupling transmits power to the screw rod, driving the nut sleeve for transmission, and controls the bidirectional feed speed of the nut sleeve by changing the speed of the servo motor. 3. The double-sided grinding equipment of a large aspect ratio optical cover according to claim 1, characterized in that the central water outlet electric spindle includes a grinding fluid inlet, a grinding fluid injection port, a water cooling inlet and a water cooling outlet, The grinding fluid is injected through the grinding fluid inlet, and finally ejected from the grinding fluid injection port at the connection between the central water outlet electric spindle and the porous grinding tool to ensure that the grinding fluid flows into the grinding tool; at the same time, water passes through the water cooling inlet And the water-cooling outlet circulates cooling around the central water outlet electric spindle. 4. The double-sided grinding equipment of a large aspect ratio optical cover according to claim 1, characterized in that the adjustable clamp includes a cylinder, a moving plate, a V-shaped block and a flexible gasket, and the adjustable clamp is arranged on On the inside of the middle bracket of the screw guide rail transmission mechanism, the distance is adjusted by controlling the moving plate of the cylinder. A flexible gasket is provided on the inside of the V-shaped block to prevent damage to the optical cover during clamping processing. 5. The double-sided grinding equipment for a large aspect ratio optical cover according to claim 4, characterized in that at the same time, a two-component silicone glue can be coated on the inside of the flexible gasket for placing the optical cover on the Rotation occurs in the X-axis direction during processing. 6. The double-sided grinding equipment of a large aspect ratio optical cover according to claim 1, characterized in that the supporting tile base includes an upper part of the tile base and a lower part of the tile base, and the upper part of the tile base and the tile base The lower part is arched and surrounds the supported structure, and the two are fixedly connected through bolts and fixed seats. 7. The double-sided grinding equipment of a large aspect ratio optical cover according to claim 1, wherein the porous grinding tool includes a porous outer surface grinding tool and a porous inner surface grinding tool, wherein the porous outer surface grinding tool The surface grinding tool is arranged on one side of the center water outlet electric spindle, and the porous inner surface grinding tool is arranged on the other side of the center water outlet electric spindle. 8. The double-sided grinding equipment of a large aspect ratio optical cover according to claim 1, characterized in that the porous grinding tool is prepared by laser selective melting technology, and the binding agent used is CuSn20 with a particle size of 50 Micron, the abrasive grains are diamond and the particle size is 20 microns. 9. The double-sided grinding equipment of a large aspect ratio optical cover according to claim 8, characterized in that the porous grinding tool has a porous structure, and the porous structure is a porous unit cell structure, and is defined as a pole. Small curved surface structure, the cell size of the porous unit cell structure is 2mm, and the porosity is 50%-80%. 10. The double-sided grinding equipment of a large aspect ratio optical cover according to claim 1, characterized in that the length-to-diameter ratio L/R of the optical cover to be ground ranges from 1 to 3.