Processing device and method for strip-shaped spherical optical element with high-precision sphere center

Abstract

The invention belongs to the technical field of optical cold machining, and particularly relates to a high-precision sphere center strip-shaped spherical optical element machining device and method.The device comprises an inclination adjusting mechanism, the inclination adjusting mechanism is fixed to a polishing machine, a translation adjusting mechanism is arranged on the inclination adjusting mechanism, and an upper disc plate is arranged on the translation adjusting mechanism; a strip-shaped part is fixed to the upper disc plate, matched grinding blocks are evenly distributed on the periphery of the strip-shaped part on the upper disc plate, and the strip-shaped part and the matched grinding blocks make contact with a polishing machine for machining. The inclination angle of the workpiece to be machined in the Z-axis direction can be adjusted by arranging the inclination adjusting mechanism, the displacement of the workpiece to be machined in the X-axis direction and the Y-axis direction can be adjusted by arranging the translation adjusting mechanism, the strip-shaped part and the matched grinding block on the upper disc plate are matched with each other and combined into a whole, machining of the non-circular part is achieved, and the device is simple in structure, convenient to disassemble and assemble and high in practicability. Batch production is facilitated, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of optical cold processing, and in particular relates to a device and method for processing a strip spherical optical element with a high-precision ball center. Background Art

[0002] The center of a traditional optical spherical part is obtained by the process of centering and edge grinding. This method first completes the spherical surface processing, then determines the center position of the spherical surface through eccentricity detection, and finally uses the edge grinding machine to clamp the part to find the center position of the part. The outer circle of the part is made concentric with the center of the sphere by edge grinding. The disadvantages of this method are: 1) The radial runout of the machine tool has a great influence on the processing accuracy of the center of the sphere; 2) The part must be in contact with the spherical surface of the part during the clamping and centering process, which will destroy the surface defects and roughness quality of the part, and it is impossible to process parts with high requirements for surface defects and roughness levels; 3) The process of centering and edge grinding can only be used to correct the center of circular parts by edge grinding, and cannot be used to correct the center of long rectangular or other special-shaped parts by edge grinding; 4) The process of centering and edge grinding can only be used to process parts with the center at the geometric center, and cannot be used to process parts that require the center to deviate from the geometric center. Summary of the invention

[0003] The purpose of the present invention is to provide a high-precision center-center strip spherical optical element processing device and method to solve the technical problem that the prior art can only perform edge grinding and correction on the center of circular parts, but cannot perform edge grinding and correction on the center of long rectangular or other special-shaped parts.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present application discloses a high-precision ball-center strip spherical optical element processing device, including a tilt adjustment mechanism, the tilt adjustment mechanism is fixed on a polishing machine, the tilt adjustment mechanism is provided with a translation adjustment mechanism, the translation adjustment mechanism is provided with an upper plate, a strip part is fixed on the upper plate, and matching grinding blocks are evenly distributed around the strip part on the upper plate, and the strip part and the matching grinding blocks are in contact with the polishing machine for processing.

[0005] Preferably, the tilt adjustment mechanism includes a fixing member and an adjusting member, a polishing machine main shaft connecting threaded sleeve is fixedly provided below the fixing member for connecting the polishing machine, the adjusting member is bolted to the fixing member, and a translation adjustment mechanism is provided on the adjusting member.

[0006] Preferably, the translation adjustment mechanism comprises an X-axis adjustment unit and a Y-axis adjustment unit, the Y-axis adjustment unit is arranged on the tilt adjustment mechanism, the X-axis adjustment unit is arranged on the Y-axis adjustment unit, and the upper plate is arranged on the X-axis adjustment unit.

[0007] Preferably, a groove for fixing the strip-shaped parts is provided on the upper plate, and the surface accuracy of the upper plate is less than 0.8um.

[0008] Preferably, the strip-shaped parts and the grinding blocks are bonded to the upper plate by using yellow wax.

[0009] Preferably, the contact surface of the strip-shaped part and the grinding block fixed with the upper plate is smaller than 0.3 um.

[0010] In a second aspect, the present application further discloses a method for processing a strip spherical optical element with a high-precision ball center, which is implemented by using any of the above-mentioned devices for processing a strip spherical optical element with a high-precision ball center, and the method comprises: S1: Fix the processing device with the strip-shaped part installed on the grinding and polishing machine for grinding; process the strip-shaped part and the matching grinding block from a flat surface into a spherical surface to obtain a spherical part; S2: Place the processing device with the spherical part installed on the eccentricity instrument, measure the eccentricity value of the spherical part, adjust the translation adjustment mechanism and the tilt adjustment mechanism according to the eccentricity value, so that the center of the spherical part is in a preset state; use a polishing machine to polish the spherical part to the preset accuracy requirement to obtain a strip spherical part.

[0011] Preferably, in S1, the strip part is ground using a copper grinding disc having a curvature that is the same as the required curvature of the strip part, which specifically includes: S101: Use grinding fluid and grinding disc to process the bar-shaped parts, and process the bar-shaped parts and the matching grinding blocks from flat surfaces to spherical surfaces, and the edge height error is less than 0.08mm; S102: Use grinding fluid and grinding disc to process the spherical surface of bar-shaped parts and matching grinding blocks, with a removal amount of 0.25mm and an edge height error of less than 0.07mm; S103: Using grinding fluid and grinding disc, the spherical surface of bar-shaped parts and matching grinding blocks is machined, the removal amount is 0.18mm, and the edge height error is less than 0.04mm; S103: The strip-shaped parts and the grinding blocks are processed on the spherical surface by using the grinding liquid and the grinding disc. The removal amount is greater than 0.12 mm, and the edge height error is less than 0.02 mm, so as to obtain the spherical parts.

[0012] Preferably, in S2, pure water and cerium oxide polishing powder with a particle size of 1 to 1.5 um are mixed in a volume ratio of 10 to 20:1 to prepare a polishing liquid, and the spherical surface of the part is processed with an asphalt polishing disk, and the part processing removal amount is required to be not less than 0.02 mm, and the surface shape N is less than 1; the ball center accuracy is processed to an index of less than 30" to obtain a strip spherical part.

[0013] Preferably, the grinding liquid in S101 is a mixture of W60 corundum grinding powder and pure water; the grinding liquid in S102 is a mixture of W40 corundum grinding powder and pure water; the grinding liquid in S103 is a mixture of W28 corundum grinding powder and pure water; the grinding liquid in S104 is a mixture of W10 corundum grinding powder and pure water; the corundum grinding powder and pure water are mixed in a volume ratio of 1:3~5.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The invention discloses a high-precision ball-center strip spherical optical element processing device. By setting a tilt adjustment mechanism, the tilt angle of the workpiece to be processed in the Z-axis direction can be adjusted. By setting a translation adjustment mechanism, the displacement of the workpiece to be processed in the X-axis and Y-axis can be adjusted. The adjustments in the three directions of the X-axis, the Y-axis and the Z-axis are independent of each other and will not affect each other. A strip part and matching grinding blocks uniformly distributed around the upper plate are arranged. The strip part and the matching grinding blocks cooperate with each other and are combined into a whole, so that the processing of non-circular parts is realized, and the technical problems in the prior art are solved. The device has a simple structure, is easy to disassemble and assemble, is convenient for mass production, and greatly improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the device of the present invention; Figure 2 This is an assembly diagram of the strip parts, the grinding parts and the upper plate of the present invention; (a) is the main view and (b) is the top view.

[0017] Among them: 1-strip parts; 2-matching grinding blocks; 3-upper plate; 4-translation adjustment mechanism; 5-tilt adjustment mechanism; 6-polishing machine spindle connecting threaded sleeve; 7-spherical polishing mold; 8-polishing machine swing rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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. Generally, 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.

[0019] 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 invention claimed for protection, 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 this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 1The present invention discloses a high-precision ball-center strip spherical optical element processing device, including a tilt adjustment mechanism 5, the tilt adjustment mechanism 5 is fixed on a polishing machine, a translation adjustment mechanism 4 is arranged on the tilt adjustment mechanism 5, an upper plate 3 is arranged on the translation adjustment mechanism 4, a strip part 1 is fixed on the upper plate 3, and matching grinding blocks 2 are evenly distributed around the strip part 1 on the upper plate 3, and the strip part 1 and the matching grinding blocks 2 are in contact with the polishing machine for processing. By setting the tilt adjustment mechanism, the tilt angle of the workpiece to be processed in the Z-axis direction can be adjusted, and by setting the translation adjustment mechanism, the displacement of the workpiece to be processed in the X-axis and Y-axis can be adjusted, and the adjustments in the three directions of the X-axis, Y-axis and Z-axis are independent of each other and will not affect each other. The strip part and the matching grinding blocks are arranged on the upper plate, and the strip part and the matching grinding blocks are evenly distributed around; the strip part and the matching grinding blocks cooperate with each other and are combined into a whole, so as to realize the processing of non-circular parts, solve the technical problems in the prior art, and the device has a simple structure, is easy to disassemble and assemble, is convenient for mass production, and greatly improves the production efficiency.

[0025] In some embodiments, the tilt adjustment mechanism 5 includes a fixing part and an adjusting part. A polishing machine spindle connecting threaded sleeve 6 is fixedly arranged under the fixing part for connecting the polishing machine. The adjusting part is bolted to the fixing part, and a translation adjustment mechanism 4 is arranged on the adjusting part.

[0026] In some embodiments, it is characterized in that the translation adjustment mechanism 4 includes an X-axis adjustment unit and a Y-axis adjustment unit, the Y-axis adjustment unit is arranged on the tilt adjustment mechanism 5, and the X-axis adjustment unit is arranged on the Y-axis adjustment unit; the upper plate 3 is arranged on the X-axis adjustment unit.

[0027] Specifically, the X-axis adjustment unit includes a fixed plate and an adjustment plate. The fixed plate is fixed on the Y-axis adjustment unit, the adjustment plate is arranged on one side of the fixed plate, the fixed plate and the adjustment plate are connected by bolts, and the adjustment plate can achieve displacement in the X-axis direction by screwing in or out the bolts. The upper plate 3 is arranged on the adjustment plate and achieves displacement following the adjustment plate.

[0028] Specifically, the Y-axis adjustment unit includes a fixed block and a displacement block, the fixed block is fixed on the tilt adjustment mechanism 5, the displacement block is arranged on one side of the fixed block, the fixed block and the displacement block are connected by bolts, and the displacement block can be displaced in the Y-axis direction by screwing in or out of the bolts, and the X-axis adjustment unit is arranged on the displacement block.

[0029] In some embodiments, a groove for fixing the strip-shaped part 1 is provided on the upper plate 3, and the surface accuracy of the upper plate 3 is less than 0.8 um.

[0030] In some embodiments, the strip-shaped part 1 and the grinding block 2 are bonded to the upper plate 3 using yellow wax.

[0031] In some embodiments, the contact surfaces of the strip-shaped part 1 and the grinding block 2 fixed with the upper plate 3 are all less than 0.3 um.

[0032] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a batch processing method for ultra-smooth surface optical elements of strip mirrors with extremely high spherical center accuracy requirements, so as to solve the problem of low spherical center processing accuracy of such optical elements.

[0033] In some embodiments, see Figure 1 A high-precision ball center strip spherical optical element processing device includes a strip part 1, a grinding block 2, an upper plate 3, an X-direction and Y-direction translation adjustment mechanism 4, a Z-direction tilt adjustment mechanism 5, a polishing machine spindle connecting threaded sleeve 6, a spherical polishing mold 7, and a polishing machine swing rod 8. The device is combined into one by dispensing glue and threaded connection methods, and the displacement parameters are adjusted and reprocessed according to the detection index of the ball center during the processing, so that the ball center accuracy is less than the index requirement of 30″.

[0034] See also Figure 2 As shown, the strip-shaped part 1, the grinding block 2, and the upper plate 3 are bonded together with yellow wax. The specific method is as follows: See Figure 2 1) Wipe the contact surface between the upper plate and the parts, and the contact surface of the grinding block with absorbent cotton dipped in gasoline; 2) Heat the parts, grinding blocks and upper plate on the electric heating plate to the melting point of the yellow wax; 3) Apply a layer of yellow wax evenly on the upper plate; 4) Place the parts in the center of the upper plate, with the surface to be processed facing upward, and place the grinding blocks evenly on the upper plate to surround the parts in the center; 5) The assembly is cooled to room temperature, and the parts and the grinding blocks are glued to the upper plate; 6) Use screws to connect the upper plate assembly to the X-axis and Y-axis translation adjustment mechanisms; 7) Use screws to connect the X-axis and Y-axis translation adjustment mechanisms with the Z-axis tilt adjustment mechanism; 8) Use screws to connect the Z-axis tilt adjustment mechanism to the polishing machine spindle threaded sleeve; 9) The spindle connection thread sleeve is put on the spindle of the polishing machine.

[0035] Note: In order to ensure the machining accuracy of parts, the above-mentioned tooling and parts need to pay attention to the following special requirements.

[0036] 1) The surface accuracy of the upper plate is less than 1um; 2) The contact surface between the strip part 1, the grinding block 2 and the wax-adhered upper plate 3 is less than 0.5 um; 3) The basic coincidence error between the center of the strip part 1 and the upper plate 3 is less than 0.5mm; 4) Before bonding the strip part 1, the grinding block 2 and the upper plate 3, the parallelism of the three parts needs to be processed to less than 1um.

[0037] The present application also discloses a method for processing a strip spherical optical element with a high-precision center. By using the above-mentioned processing device, the center of the rectangular part can be adjusted according to the detection result of the center of the part by the eccentricity instrument during the processing, and then the part is optically processed to obtain a rectangular optical part with a high-precision center.

[0038] The present invention also discloses a method for processing a strip spherical optical element with a high-precision ball center, which is implemented by using any one of the above-mentioned devices for processing a strip spherical optical element with a high-precision ball center. The method comprises: S1: Fix the processing device with the strip-shaped part 1 installed on the grinding and polishing machine for grinding; process the strip-shaped part 1 and the matching grinding block 2 from a flat surface into a spherical surface to obtain a spherical part; S2: Place the processing device with the spherical part installed on the eccentricity instrument, measure the eccentricity value of the spherical part, adjust the translation adjustment mechanism 4 and the tilt adjustment mechanism 5 according to the eccentricity value, so that the center of the spherical part is in a preset state; use a polishing machine to polish the spherical part to the preset accuracy requirement to obtain a strip spherical part.

[0039] In some embodiments, in S1, grinding the strip part 1 with a copper grinding disc having the same curvature as the required curvature of the strip part 1 specifically includes: S101: The strip-shaped part 1 is processed by using a grinding liquid and a grinding disc, and the strip-shaped part 1 and the matching grinding block 2 are processed from a flat surface to a spherical surface, and the edge height error is less than 0.08 mm; S102: Using the grinding fluid and grinding disc, the spherical surface of the bar-shaped part 1 and the grinding block 2 is machined, the removal amount is 0.25mm, and the 8 measuring points with symmetry on the edge are measured, and the height error is less than 0.07mm; S103: Using the grinding liquid and the grinding disc, the spherical surface of the bar-shaped part 1 and the grinding block 2 is processed, the removal amount is 0.18mm, and the 8 measuring points with symmetry on the edge are measured, and the height error is less than 0.04mm; S103: The strip part 1 and the grinding block 2 are processed on the spherical surface by using the grinding liquid and the grinding disc. The removal amount is greater than 0.12 mm. The 8 measuring points with symmetrical edges are measured. The height error is less than 0.02 mm, and the spherical part is obtained.

[0040] Further preferably, the grinding liquid in S101 is a mixture of W60 corundum grinding powder and pure water; the grinding liquid in S102 is a mixture of W40 corundum grinding powder and pure water; the grinding liquid in S103 is a mixture of W28 corundum grinding powder and pure water; the grinding liquid in S104 is a mixture of W10 corundum grinding powder and pure water; the corundum grinding powder and pure water are mixed in a volume ratio of 1:3~5.

[0041] In some embodiments, in S2, pure water and cerium oxide polishing powder with a particle size of 1 to 1.5 um are mixed in a volume ratio of 10 to 20:1 to prepare a polishing liquid, and an asphalt polishing disk is used to process the spherical surface of the part. The part processing removal amount is required to be not less than 0.02 mm, and the surface shape N is less than 1; the ball center accuracy is processed to an index of less than 30" to obtain a strip spherical part.

[0042] In some embodiments, a method for processing a strip spherical optical element with a high-precision spherical center includes: 1. Grinding Connect the polishing machine spindle connecting thread sleeve 6 to the grinding and polishing machine spindle, and use the grinding and polishing machine to grind the spherical surface of the part. It is required to use a copper or grinding disc. The curvature of the grinding disc should be the same as the curvature of the processed part. Grind according to the following methods: 1) Use W60 diamond abrasive powder and pure water to mix and prepare the abrasive liquid, use the abrasive disc to process the spherical surface of the part, and process the part and the matching abrasive block from a flat surface to a spherical surface. The measured edge height is better than 0.1mm; 2) Use W40 diamond abrasive powder and pure water to mix and prepare the abrasive liquid, use the abrasive disc to process the spherical surface of the part, remove more than 0.2mm of the part, measure 8 symmetrical measuring points on the edge, and the height is better than 0.08mm; 3) Use W28 diamond abrasive powder and pure water to mix and prepare the abrasive liquid, use the abrasive disc to process the spherical surface of the part, remove more than 0.15mm of the part, measure 8 symmetrical measuring points on the edge, and the height is better than 0.05mm; 4) Use W10 diamond abrasive powder and pure water to mix and prepare the abrasive liquid, use the abrasive disc to process the spherical surface of the part, remove more than 0.1mm of the part, measure 8 symmetrical measuring points on the edge, and the height is better than 0.03mm; 2. Polishing Use a polishing machine to polish the spherical surface of the part. It is required to use an asphalt polishing disc. The curvature of the polishing disc should be the same as the curvature of the processed part. Polish according to the following methods. Use cerium oxide polishing powder with a particle size of 2~3um and pure water to prepare the polishing liquid, and use asphalt polishing disc to process the spherical surface of the parts. Polishing should be done to achieve visually no pitting and surface shape N<1; Remove the spindle connecting sleeve 6 from the polishing machine; Loosen the screws of the X-direction and Y-direction translation adjustment mechanism 4 and the Z-direction tilt mechanism; Place the X-direction and Y-direction translation adjustment mechanism with the part on the eccentricity instrument to measure the eccentricity value of the part and record it; According to the eccentricity value, calculate and adjust the offset of the X-direction and Y-direction translation adjustment mechanism; Use screws to connect the X-direction and Y-direction translation adjustment mechanisms with the Z-direction tilt mechanism, and adjust the offset of the Z-direction tilt mechanism according to the eccentricity value; Use 1-1.5um cerium oxide polishing powder mixed with pure water to prepare polishing liquid, and use asphalt polishing disc to process the spherical surface of the part. The part removal amount is required to be no less than 0.02mm, and the surface shape N <1; Repeat steps 2) to 7) to process the ball center accuracy to less than 30″.

[0043] 3. Loosen all the screws and heat the parts tray on the electric heating plate to the melting point of the yellow wax to separate the parts from the workpiece tray.

[0044] Example: This embodiment uses a curvature of R1000 and a concave spherical part with an outer dimension of 100×20×10 to process. The surface of 100×20 is processed into a concave spherical surface, and the center of the sphere is ensured to be at the geometric center of the part, and the error is better than 0.01. Specifically, the following steps are included: See also Figure 2 As shown, the strip part 1 (size 100×20×10), the grinding block 2 (size 20×20×10)), and the upper plate 3 are bonded together with yellow wax. The specific method is as follows: 1) Wipe the contact surface between the upper plate and the parts, and the contact surface of the grinding block with absorbent cotton dipped in gasoline; 2) Heat the parts, grinding blocks and upper plate on the electric heating plate to the melting point of the yellow wax; 3) Apply a layer of yellow wax evenly on the upper plate; 4) Place the parts in the center of the upper plate, with the surface to be processed facing upward, and place the grinding blocks evenly on the upper plate to surround the parts in the center; 5) The assembly is cooled to room temperature, and the parts and the grinding blocks are glued to the upper plate; 6) Use screws to connect the upper plate assembly to the X-axis and Y-axis translation adjustment mechanisms; 7) Use screws to connect the X-axis and Y-axis translation adjustment mechanisms with the Z-axis tilt adjustment mechanism; 8) Use screws to connect the Z-axis tilt adjustment mechanism to the polishing machine spindle threaded sleeve; 9) The spindle connection thread sleeve is put on the spindle of the polishing machine.

[0045] Furthermore, the above structure also includes: 1) Upper plate, surface accuracy 0.8um; 2) The contact surface between the part, the grinding block and the wax-adhered upper plate is better than 0.3 um; 3) After the parts are bonded to the upper plate, the center overlap error between the parts and the upper plate is less than 0.5mm; 4) Before bonding the parts and the grinding block to the upper plate, the parallelism needs to be processed to better than 1um. Specific processing method 1. Grinding Connect the polishing machine spindle connecting thread sleeve 6 to the grinding and polishing machine spindle, and use the grinding and polishing machine to grind the spherical surface of the part. It is required to use a copper or grinding disc. The curvature of the grinding disc should be the same as the curvature of the processed part. Grind according to the following methods. 1) Use W60 diamond abrasive powder and pure water to mix and prepare the abrasive liquid, use the abrasive disc to process the spherical surface of the part, and process the part and the matching abrasive block from a flat surface to a spherical surface. The measured edge height is better than 0.08mm; 2) Use W40 diamond abrasive powder and pure water to mix and prepare the abrasive liquid, use the abrasive disc to process the spherical surface of the part, remove 0.25mm of the part, measure 8 symmetrical measurement points on the edge, and the height is better than 0.07mm; 3) Use W28 diamond abrasive powder and pure water to mix and prepare abrasive liquid, use a grinding disc to process the spherical surface of the part, remove 0.18mm of the part, measure 8 symmetrical measurement points on the edge, and the height is better than 0.04mm; 4) Use W10 diamond abrasive powder and pure water to mix and prepare the abrasive liquid, use the abrasive disc to process the spherical surface of the part, remove more than 0.12mm of the part, measure 8 symmetrical measuring points on the edge, and the height is better than 0.02mm; 2. Polishing Use a polishing machine to polish the spherical surface of the part. It is required to use an asphalt polishing disc. The curvature of the polishing disc should be the same as the curvature of the processed part. Polish according to the following methods. Use cerium oxide polishing powder with a particle size of 2~3um and pure water to prepare the polishing liquid, and use asphalt polishing disc to process the spherical surface of the parts. Polishing should be done to achieve visually no pitting and surface shape N<1; Remove the spindle connecting sleeve 6 from the polishing machine; Loosen the screws of the X-direction and Y-direction translation adjustment mechanism 4 and the Z-direction tilt mechanism; The X-direction and Y-direction translation adjustment mechanism with the part is placed on the eccentricity instrument to measure the eccentricity of the part, which is 3.2mm in the X direction and 0.9mm in the Y direction. According to the eccentricity value, the theoretical value of the center of the ball needs to be calculated by adjusting the values ​​in the X, Y, and Z directions; Use screws to connect the X-direction and Y-direction translation adjustment mechanisms with the Z-direction tilt mechanism, and adjust the offsets of the X-direction, Y-direction, and Z-direction mechanisms according to the eccentricity value; Use 1-1.5um cerium oxide polishing powder mixed with pure water to prepare polishing liquid, and use asphalt polishing disc to process the spherical surface of the part. The part removal amount is required to be no less than 0.02mm, and the surface shape N <1; Repeat steps 2) to 7) to process the ball center accuracy to less than 30″.

[0046] 3. Loosen all screws and heat the parts tray on the electric heating plate to the melting point of the yellow wax to separate the parts from the workpiece tray.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision ball-center strip spherical optical element processing device, characterized in that: The invention comprises a tilt adjustment mechanism (5), the tilt adjustment mechanism (5) is fixed on the polishing machine, a translation adjustment mechanism (4) is arranged on the tilt adjustment mechanism (5), an upper plate (3) is arranged on the translation adjustment mechanism (4), a strip-shaped part (1) is fixed on the upper plate (3), matching grinding blocks (2) are evenly distributed around the strip-shaped part (1) on the upper plate (3), and the strip-shaped part (1) and the matching grinding blocks (2) are in contact with the polishing machine for processing.

2. The high-precision ball-center strip spherical optical element processing device according to claim 1 is characterized in that: The tilt adjustment mechanism (5) comprises a fixing part and an adjusting part, a polishing machine main shaft connecting threaded sleeve (6) is fixedly arranged below the fixing part for connecting the polishing machine, the adjusting part is bolted to the fixing part, and a translation adjustment mechanism (4) is arranged on the adjusting part.

3. The high-precision ball-center strip spherical optical element processing device according to claim 1, characterized in that: The translation adjustment mechanism (4) comprises an X-axis adjustment unit and a Y-axis adjustment unit, the Y-axis adjustment unit is arranged on the tilt adjustment mechanism (5), the X-axis adjustment unit is arranged on the Y-axis adjustment unit, and the upper plate (3) is arranged on the X-axis adjustment unit.

4. The high-precision ball-center strip spherical optical element processing device according to claim 1, characterized in that: The upper plate (3) is provided with a groove for fixing the strip-shaped part (1), and the surface shape accuracy of the upper plate (3) is less than 0.8 um.

5. The high-precision ball-center strip spherical optical element processing device according to claim 4, characterized in that: The strip-shaped part (1) and the matching grinding block (2) are bonded to the upper plate (3) using yellow wax.

6. The high-precision ball-center strip spherical optical element processing device according to claim 4, characterized in that: The contact surfaces of the strip-shaped part (1) and the matching grinding block (2) fixed with the upper plate (3) are all less than 0.3 um.

7. A method for processing a strip spherical optical element with a high-precision spherical center, characterized in that: The method is implemented by using the high-precision ball-center strip spherical optical element processing device according to any one of claims 1 to 6, and comprises: S1: fixing the processing device equipped with the strip-shaped part (1) on a grinding and polishing machine for grinding; processing the strip-shaped part (1) and the matching grinding block (2) from a flat surface into a spherical surface to obtain a spherical part; S2: The processing device with the spherical part installed is placed on the eccentricity instrument to measure the eccentricity value of the spherical part, and the translation adjustment mechanism (4) and the tilt adjustment mechanism (5) are adjusted according to the eccentricity value so that the center of the spherical part is in a preset state; the spherical part is polished by a polishing machine to a preset accuracy requirement, thereby obtaining a strip spherical part.

8. The method for processing a high-precision spherical center strip spherical optical element according to claim 7, characterized in that: In S1, grinding the strip part (1) using a copper grinding disc having a curvature that is the same as the required curvature value of the strip part (1) specifically includes: S101: using a grinding liquid and a grinding disc to process the strip-shaped part (1), the strip-shaped part (1) and the matching grinding block (2) are processed from a flat surface to a spherical surface, and the edge height error is less than 0.08 mm; S102: using abrasive liquid and abrasive disc to process the spherical surface of the bar-shaped part (1) and the matching grinding block (2), the removal amount is 0.25 mm, and the edge height error is less than 0.07 mm; S103: using abrasive liquid and abrasive disc to process the spherical surface of the bar-shaped part (1) and the matching grinding block (2), the removal amount is 0.18 mm, and the edge height error is less than 0.04 mm; S103: Using a grinding liquid and a grinding disc to process the spherical surface of the strip-shaped part (1) and the matching grinding block (2), the removal amount is greater than 0.12 mm, and the edge height error is less than 0.02 mm, thereby obtaining a spherical part.

9. The method for processing a high-precision spherical center strip spherical optical element according to claim 7, characterized in that: In S2, pure water and cerium oxide polishing powder with a particle size of 1 to 1.5 um are mixed in a volume ratio of 10 to 20:1 to prepare a polishing liquid, and the spherical surface of the part is processed with an asphalt polishing disk. The part processing removal amount is required to be not less than 0.02 mm, and the surface shape N is less than 1; the ball center accuracy is processed to an index of less than 30" to obtain a strip spherical part.

10. The method for processing a high-precision spherical center strip spherical optical element according to claim 8, characterized in that: The grinding liquid in S101 is a mixture of W60 corundum grinding powder and pure water; the grinding liquid in S102 is a mixture of W40 corundum grinding powder and pure water; the grinding liquid in S103 is a mixture of W28 corundum grinding powder and pure water; the grinding liquid in S104 is a mixture of W10 corundum grinding powder and pure water; the corundum grinding powder and pure water are mixed in a volume ratio of 1:3~5.

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