CN115139191A - Polishing method of optical lens mould core - Google Patents
Polishing method of optical lens mould core Download PDFInfo
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- CN115139191A CN115139191A CN202211076001.5A CN202211076001A CN115139191A CN 115139191 A CN115139191 A CN 115139191A CN 202211076001 A CN202211076001 A CN 202211076001A CN 115139191 A CN115139191 A CN 115139191A
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- optical lens
- lens mold
- mold core
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/006—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
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- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a polishing method of an optical lens mold core, which comprises the following steps: adopting abrasive paper with the grinding granularity from coarse to fine in sequence to perform rough polishing and grinding on the glue position surface of the machined optical lens mold core until the surface roughness of the glue position surface is smaller than a first preset roughness; pre-grinding the glue position surface coated with the first grinding paste by using a horsehair brush until the surface roughness of the glue position surface is smaller than a second preset roughness; performing semi-fine polishing and grinding on the glue position surface coated with the second grinding paste by using mirror paper until the surface roughness of the glue position surface is less than a third preset roughness; and (4) carrying out fine grinding on the glue position surface on which the polishing solution is dripped by using polishing cloth until the surface roughness of the glue position surface is less than a fourth preset roughness. The invention can reduce the surface roughness of the optical lens mold core and improve the excellent performance of the optical curved surface of the intelligent glasses in the aspect of imaging.
Description
Technical Field
The invention relates to the technical field of mechanical equipment, in particular to a polishing method of an optical lens mold core.
Background
With the popularization and development of the concept of the metastic space, smart glasses such as VR (Virtual Reality) glasses or AR (Augmented Reality) glasses are becoming one of the key development directions of the leading-edge technologies. Due to the excellent performance of the optical curved surface in the aspect of imaging, the optical curved surface is widely used in the optical imaging lens of the current intelligent glasses. In order to obtain higher definition, higher requirements are put on the surface precision of the optical lenses of the intelligent glasses.
At present, in the development of technology for improving the surface accuracy of an optical lens, in a mold for producing an optical lens, the surface roughness of the molding surface of the optical lens mold core is a main factor limiting the improvement of the surface accuracy of the lens. However, the surface roughness of the glue site surface of the optical lens mold core processed by the mechanical processing method is low (mostly, only 0.4 μm), which is far from the nanometer level precision required by the product, so the surface of the mold core molding surface (i.e. the glue site surface) needs to be polished after the mechanical processing, but the surface roughness of the optical lens mold core polished by the traditional polishing process is still high, which cannot meet the requirement of clear imaging of the intelligent glasses.
Disclosure of Invention
The invention mainly aims to provide a polishing method of an optical lens mold core, aiming at reducing the surface roughness of the optical lens mold core, so that the surface roughness of the optical lens mold core can meet the requirement of nano-scale precision, and the excellent performance of an optical curved surface of intelligent glasses in the aspect of imaging is improved.
In order to achieve the above object, the present invention provides a method for polishing an optical lens mold, comprising the steps of:
the method comprises the following steps of performing rough polishing and grinding on a glue position surface of a machined optical lens mold core by sequentially adopting abrasive paper with the grinding granularity from coarse to fine until the surface roughness of the glue position surface is smaller than a first preset roughness, wherein the value range of the first preset roughness is 35nm to 45nm;
smearing first grinding paste to a glue position surface with the surface roughness smaller than the first preset roughness, and pre-grinding the glue position surface coated with the first grinding paste by using a horsehair brush until the surface roughness of the glue position surface is smaller than a second preset roughness, wherein the grinding granularity size corresponding to the first grinding paste is 1-3 mu m, and the value range of the second preset roughness is 20-25 nm;
coating a second grinding paste on a glue position surface with the surface roughness smaller than the second preset roughness, and performing semi-fine polishing and grinding on the glue position surface coated with the second grinding paste by using mirror paper until the surface roughness of the glue position surface is smaller than a third preset roughness, wherein the grinding granularity size corresponding to the second grinding paste is smaller than 1 mu m, and the value range of the third preset roughness is 8nm to 12nm;
and dropping the polishing liquid on a glue position surface with the surface roughness smaller than the third preset roughness, and precisely grinding the glue position surface with the polishing liquid dropped thereon by using polishing cloth until the surface roughness of the glue position surface is smaller than a fourth preset roughness, and determining that the polishing of the optical lens mold core is finished, wherein the value range of the fourth preset roughness is 0.8nm to 1.2nm.
Optionally, the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially using sand paper with a grinding granularity from coarse to fine comprises the following steps:
checking whether a glue position surface of the optical lens mold core after machining and forming has an appearance defect, wherein the appearance defect comprises a defect that the depth of a flaw on the glue position surface is greater than a first preset depth threshold, and the value range of the first preset depth threshold is 0.25mm to 0.4mm;
if not, executing the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially adopting sand paper with the grinding granularity from coarse to fine.
Optionally, the step of checking whether the glue position surface of the optical lens mold core after machining has an appearance defect includes:
if so, returning the optical lens mold core to the processing group corresponding to the machining of the machine for reworking so as to eliminate the appearance defect.
Optionally, the step of pre-grinding the glue site surface coated with the first grinding paste by using a horse brush comprises:
the method comprises the steps that a horse hair brush is driven by a polishing machine to rotate at a preset rotating speed, and the rubber position surface coated with first grinding paste is pre-ground through the rotating horse hair brush, wherein the preset rotating speed is 1300 r/min-1700 r/min.
Optionally, the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially using sand paper with a grinding granularity from coarse to fine comprises:
adopting abrasive paper with a grinding granularity of a first granularity to carry out first rough polishing on the glue position surface of the machined optical lens mold core, and checking whether the glue position surface subjected to the first rough polishing has sand paper grain defects;
and when the glue position surface after the first rough polishing and grinding does not have the grain defect of the abrasive paper, performing second rough polishing and grinding on the glue position surface of the optical lens mold core after machining and forming by using the abrasive paper with the grinding granularity of a second granularity, wherein the second granularity is smaller than the first granularity.
Optionally, the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially using sand paper with a grinding granularity from coarse to fine comprises:
sequentially adopting 800-mesh, 1000-mesh and 1200-mesh sand paper to carry out third rough polishing and grinding on the glue position surface of the machined optical lens mold core;
after the third rough polishing and grinding are finished, detecting whether the glue site surface after the third rough polishing and grinding is provided with substrate impurity defects, wherein the substrate impurity defects are bubbles which emerge on the glue site surface and have a depth larger than a second preset depth threshold value, and the value range of the second preset depth threshold value is 0.8-1.2 mu m;
if not, adopting 1500-mesh, 2000-mesh and 2500-mesh sand paper in sequence to perform rough polishing grinding on the glue site surface after the third rough polishing grinding is finished.
Optionally, after the step of detecting whether the glue site surface after the third rough polishing and grinding has the substrate impurity defect, the method further includes:
and if so, returning to execute the step of performing third rough polishing and grinding on the glue position surface of the machined optical lens mold core by sequentially adopting 800-mesh, 1000-mesh and 1200-mesh sand paper.
Optionally, the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially using sand paper with a grinding granularity from coarse to fine comprises:
determining the size of the wood stick head of the rough polishing auxiliary wood stick matched with the curved surface radian according to the curved surface radian of the glue position surface of the optical lens mold core after machining and forming;
taking the rough polishing auxiliary wood stick corresponding to the matched wood stick head size as a target rough polishing auxiliary wood stick;
and (4) roughly polishing and grinding the glue position surface of the machined optical lens mold core by adopting sand paper with the grinding granularity from coarse to fine in sequence and matching with the target rough polishing auxiliary wood bar.
Optionally, the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core includes:
controlling a preset included angle between the target rough polishing auxiliary wood bar and a glue position surface of the machined optical lens mold core, and performing fourth rough polishing grinding on a right angle area and a corner area of the glue position surface;
and after the fourth rough polishing and grinding is finished, performing fifth rough polishing and grinding on a large surface area of the glue site surface subjected to the fourth rough polishing and grinding, wherein the value range of the preset included angle is 45-75 degrees.
Optionally, the step of determining the size of the head of the rough polishing auxiliary wood stick according to the curvature of the glue position surface of the optical lens mold core after machining and forming includes:
if the curvature of the glue position surface of the optical lens mold core after machining and forming is smaller than a preset curvature, determining that the head of the wood stick of the rough polishing auxiliary wood stick matched with the curvature of the curve is a cone, and the right-angle side of the cone is 3mm multiplied by 3mm, wherein the value range of the preset curvature is 8-15 degrees;
if the curvature of the glue position surface of the optical lens mold core after machining and forming is larger than or equal to the preset curvature, determining that the head of the wood stick of the rough polishing auxiliary wood stick matched with the curvature of the curve is a sphere, and the radius of the sphere is 1mm.
The invention is characterized in that in the rough polishing stage: adopting abrasive paper with the grinding granularity from coarse to fine in sequence, roughly polishing and grinding the glue position surface of the machined optical lens mold core until the surface roughness of the glue position surface is smaller than a first preset roughness, wherein the value range of the first preset roughness is 35nm to 45nm, and then entering a pre-grinding process of a semi-fine polishing stage: smearing a first grinding paste to a glue position surface with surface roughness smaller than a first preset roughness, pre-grinding the glue position surface smeared with the first grinding paste by using a horsebrush until the surface roughness of the glue position surface is smaller than a second preset roughness, wherein the grinding granularity size corresponding to the first grinding paste is 1-3 mu m, the value range of the second preset roughness is 20-25 nm, and then entering a semi-fine polishing grinding procedure in a semi-fine polishing stage: smearing a second grinding paste to a glue position surface with surface roughness smaller than a second preset roughness, performing semi-fine polishing and grinding on the glue position surface smeared with the second grinding paste by using mirror paper until the surface roughness of the glue position surface is smaller than a third preset roughness, wherein the grinding granularity size corresponding to the second grinding paste is smaller than 1 mu m, the value range of the third preset roughness is 8-12 nm, and finally entering a fine polishing stage: the polishing solution is dripped on the glue position surface with the surface roughness smaller than the third preset roughness, the glue position surface on which the polishing solution is dripped is finely ground by using polishing cloth until the surface roughness of the glue position surface is smaller than the fourth preset roughness, and the polishing of the optical lens mold core is finished, wherein the fourth preset roughness has a value range of 0.8nm to 1.2nm, so that the polishing process can enable the aspheric surface molding surface for manufacturing the intelligent glasses to meet the nanometer precision requirement by adopting different (specific) polishing auxiliary materials, polishing conditions and a standardized operation sequence in different polishing stages (including a rough polishing stage, a semi-fine polishing stage and a fine polishing stage), and compared with the traditional polishing process, the polished surface roughness can only reach about 0.1 mu m (due to improper selection of the polishing auxiliary materials and polishing conditions in each polishing stage and incapability of forming the standard operation sequence), the polishing auxiliary materials far cannot meet the roughness requirement of the optical lenses, the polishing effect is poor, the polishing auxiliary materials are used in a large amount, the waste of the polishing auxiliary materials and the polishing process is not unified, and the polishing result is not beneficial to the mass production of the optical lenses. The invention processes the machined optical lens mould core again, adopts different polishing auxiliary materials, polishing conditions and standardized operation sequence in different polishing stages (including rough polishing stage, semi-fine polishing stage and fine polishing stage) by improving the traditional polishing mode, so that the surface roughness of the optical mould core reaches the nanometer level, greatly shortens the polishing period while reducing the surface roughness of the optical lens mould core, improves the production efficiency of high-precision optical lenses, reduces the labor intensity of polishing operation, reduces the production cost of moulds, solves the production difficulty of the high-precision optical lenses of the existing intelligent glasses, and lays a foundation for the development of the XR (Extended Reality) field.
Drawings
FIG. 1 is a schematic flowchart illustrating a first embodiment of a method for polishing an optical lens mold according to the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of a method for polishing an optical lens mold insert according to the present invention;
FIG. 3 is a flowchart illustrating a third embodiment of a method for polishing an optical lens mold according to the present invention;
fig. 4 is a flowchart illustrating a step S110 of a polishing method for an optical lens mold according to a fourth embodiment of the invention.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather construed as limited to the embodiments set forth herein.
With the development of technology, injection molding technology gradually enters the optical field with its excellent characteristics. In order to reduce the manufacturing cost, the optical lens is manufactured by using an injection molding technique. Currently, in the technical development of how to improve the surface precision of the optical lens, the surface roughness of the molding surface of the optical lens mold is a main factor limiting the improvement of the surface precision of the lens. The optical lens mold core is generally machined to form a molding surface (i.e., a molding surface). The machining mode specifically comprises machining processes such as turning, milling, grinding and spark machine discharging, the surface roughness of the glue position surface can be controlled within the range of 0.1-0.5 microns approximately, however, the surface roughness of the glue position surface of the optical lens mold core machined by the machining mode is still low and far away from the nanometer precision required by a product, so that the mold core forming surface is polished after machining, but the surface roughness of the polished optical lens mold core by the traditional polishing process is still high, and the requirement of clear imaging of the intelligent glasses cannot be met.
Based on this, embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1, the method for polishing an optical lens mold according to the present invention includes:
step S100, adopting abrasive paper with the grinding granularity from coarse to fine in sequence to perform rough polishing grinding on the glue position surface of the machined optical lens mold core until the surface roughness of the glue position surface is smaller than a first preset roughness;
in this embodiment, the optical lens mold core refers to a mold core in a mold for producing an optical lens by injection molding. It will be understood by those skilled in the art that the mold core may also be referred to in the industry as a mold core. The material of the optical lens mold core can be steel material or quartz, and the material of the manufactured optical lens (i.e. the injection molding raw material used in the injection molding production) can be resin material or glass material.
Illustratively, the coated abrasive having a grit size ranging from coarse to fine may be coated abrasives having grit sizes of 800 mesh, 1000 mesh, 1200 mesh, 1500 mesh, 2000 mesh and 2500 mesh, in this order.
In this embodiment, step S100 is a rough polishing stage for polishing the mold insert of the optical lens, and the polishing auxiliary material corresponding to the rough polishing stage is the sand paper. It should be noted that the value range of the first predetermined roughness is 35nm to 45nm, so as to prevent the sand paper from excessively grinding the glue surface of the optical lens mold core, and the sand paper enters the semi-finish polishing stage of step S200 and step S300, which will be described later, so that the polishing auxiliary material corresponding to the semi-finish polishing stage is used in the semi-finish polishing stage. Meanwhile, by setting the first preset roughness standard, the grinding time of the adhesive position surface of the optical lens mold core by the abrasive paper is prevented from being too long, and the surface roughness of the adhesive position surface of the optical lens mold core cannot be effectively reduced (due to the limitation of the abrasive granularity of the abrasive paper) after the adhesive position surface reaches the first preset roughness, so that the polishing period is prolonged, the polishing efficiency is reduced, and polishing auxiliary materials are wasted.
In a possible embodiment, the abrasive paper with the grinding granularity from coarse to fine is sequentially used to perform rough polishing and grinding on the glue position surface of the machined optical lens mold core, which may specifically be:
step A10, adopting abrasive paper with a grinding granularity of a first granularity to carry out first rough polishing on the glue site surface of the machined optical lens mold core, and checking whether the glue site surface subjected to the first rough polishing has sand paper line defects;
and A20, when the glue site surface after the first rough polishing and grinding does not have the sand paper line defects, performing second rough polishing and grinding on the glue site surface of the machined optical lens mold core by using sand paper with a grinding granularity of a second granularity, wherein the second granularity is smaller than the first granularity.
In this embodiment, the first granularity may be 800 meshes of sand paper, and the second granularity may be 1000 meshes of sand paper, that is, when the sand paper with the grinding granularity of 800 meshes is used to perform the first rough polishing on the glue surface of the machined optical lens mold core, and check whether the glue surface after the first rough polishing has sand paper line defects, and then when it is determined that the glue surface after the first rough polishing does not have sand paper line defects, the sand paper with the grinding granularity of 1000 meshes is used to perform the second rough polishing on the glue surface of the machined optical lens mold core. When the second rough polishing is completed, the first particle size can be changed to 1200 mesh sandpaper and the second particle size can be changed to 1500 mesh sandpaper. That is, sand paper with a grinding granularity of 1200 meshes is used for carrying out first rough polishing on the glue position surface of the machined optical lens mold core, whether the glue position surface subjected to the first rough polishing has sand paper grain defects is checked, and then when the glue position surface subjected to the first rough polishing does not have the sand paper grain defects is determined, sand paper with a grinding granularity of 1500 meshes is used for carrying out second rough polishing on the glue position surface of the machined optical lens mold core. When the second rough polishing is completed, the first granularity can be changed into 2000-mesh sand paper, and the second granularity can be changed into 2500-mesh sand paper.
That is, the embodiment may specifically be: and (3) roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially adopting sand paper with the grinding granularity of 800 meshes, 1000 meshes, 1200 meshes, 1500 meshes, 2000 meshes and 2500 meshes. Wherein, it is right at the abrasive paper of every path abrasive grain glue the position face and carry out when roughly throwing and grind the end, all inspect and glue the position face and whether have abrasive paper line defect, do not confirming to glue the position face during abrasive paper line defect, adopt the abrasive paper of next path abrasive grain again right glue the position face and carry out the rough polishing and grind, grind the end until the whole rough polishing of each abrasive paper of saying the abrasive grain to improve the surface accuracy of the gluey position face of optical lens mould benevolence, avoid gluing the position face and appear abrasive paper line defect, and influence the imaging performance of the optical curved surface of intelligent glasses.
In the present embodiment, it can be understood by those skilled in the art that the sand paper texture defects may include sand paper particle marks, sand paper particle scratches, sand paper white fog scratches, and the like on the glue surface.
As will be appreciated by those skilled in the art, in order to facilitate polishing, a cork bar (a rough polishing auxiliary wood bar) is usually used to assist polishing in polishing the aspheric optical lens mold. When the aspheric surface is polished, the radian of the round surface and the radian of the spherical surface can be better matched by using the cork stick. The head of the used cork stick can be properly trimmed so that the head of the cork stick can keep inosculated with the shape of the glue position surface with the aspheric surface, thus avoiding the acute angle of the cork stick from contacting the glue position surface of the optical lens mould core and causing deeper scratch, and ensuring that the abrasive paper can be more closely and uniformly attached to the glue position surface and the stress is more uniform.
After the step S100, performing a step S200, applying a first polishing paste to a glue site surface with a surface roughness less than the first preset roughness, and pre-polishing the glue site surface coated with the first polishing paste by using a horsehair brush until the surface roughness of the glue site surface is less than a second preset roughness;
in this embodiment, step S200 is a pre-grinding process in a semi-finish polishing stage of polishing the mold core of the optical lens, and the polishing auxiliary materials corresponding to the pre-grinding process are the horsehair brush and the first grinding paste. It is to be understood that the horsehair brush is a brush made of horsehair which is processed, and since the yak hair is similar to the horsehair, the brush made of yak hair is also commonly referred to as a horsehair brush.
Wherein the corresponding grinding particle size of the first grinding paste is 1-3 μm. Those skilled in the art will appreciate that the first abrasive paste corresponds to a particle size of 1 μm to 3 μm, often representing the particle size number W3 of the first abrasive paste.
It should be noted that the value range of the second predetermined roughness is 20nm to 25nm, so as to prevent the horsebrush and the first polishing paste from excessively polishing the glue surface of the optical lens mold core, and the horsebrush and the first polishing paste from entering step S300 (i.e., the semi-finish polishing step of the semi-finish polishing step) which is described later if the horsebrush and the first polishing paste do not reach the surface roughness standard required by the pre-polishing step of the semi-finish polishing step, so that the semi-finish polishing step uses the polishing auxiliary material corresponding to the semi-finish polishing step. Meanwhile, by setting the standard of the second preset roughness, the grinding time of the first grinding paste on the glue position surface of the optical lens mold core is prevented from being too long, and the surface roughness of the glue position surface of the optical lens mold core cannot be effectively reduced after reaching the second preset roughness (due to the limitation of the grinding granularity of the first grinding paste), so that the polishing period is prolonged, the polishing efficiency is reduced, and polishing auxiliary materials are wasted.
Illustratively, the step of pre-grinding the glue site surface coated with the first grinding paste by using a horse brush comprises the following steps:
and B10, driving a horse brush to rotate at a preset rotating speed through a polishing machine, and pre-grinding the glue position surface coated with the first grinding paste through the rotating horse brush, wherein the preset rotating speed is 1300r/min to 1700r/min.
Through long-time repeated test verification, the embodiment discovers that the preset rotating speed range of the polishing machine is set to be 1300r/min to 1700r/min, and the probability of obvious grinding scars generated by the first grinding paste on the glue position surface can be reduced on the basis of reducing the time spent on the pre-grinding of the horsehair brush as much as possible. In addition, the positive pressure of the gum surface brush applied on the gum surface is not suitable to be too large or too small, and can be 60-100 g/cm 2 。
After the step S200, performing step S300, coating a second polishing paste on the glue position surface with a surface roughness less than the second preset roughness, and performing semi-finish polishing and grinding on the glue position surface coated with the second polishing paste by using mirror paper until the surface roughness of the glue position surface is less than a third preset roughness;
in this embodiment, step S300 is a semi-fine polishing and grinding process in a semi-fine polishing stage of polishing the mold core of the optical lens, and the polishing auxiliary materials corresponding to the semi-fine polishing and grinding process are the mirror paper and the second polishing paste. Those skilled in the art will appreciate that mirror paper may also be referred to in the industry as dust free paper, which may be M-3 dust free.
Wherein the corresponding grinding particle size of the second grinding paste is less than 1 μm. Those skilled in the art will appreciate that the second paste has a corresponding particle size of less than 1 μm, and is often represented by the first paste having a particle size number W1.
It should be noted that the third predetermined roughness value range is 8nm to 12nm, so that the situation that the mirror paper and the second polishing paste grind the glue surface of the optical lens mold core too little to reach the surface roughness standard required by the semi-finish polishing grinding process in the semi-finish polishing stage and enter the step S400 (i.e. the finish polishing stage) described later, which results in that the polishing auxiliary material corresponding to the finish polishing stage is adopted in the finish polishing stage, and when the optical lens mold core is polished, it takes a longer time to make the surface roughness of the optical lens mold core reach the surface roughness standard required by the finish polishing stage (because the polishing granularity corresponding to the second polishing paste is coarser than the polishing auxiliary material corresponding to the finish polishing stage, the time taken for the second polishing paste to polish the optical lens mold core to reach the third predetermined roughness is shorter than the polishing granularity corresponding to the finish polishing auxiliary material in the finish polishing stage), and the glue surface of the optical lens mold core is easily deformed in order to reach the surface roughness standard corresponding to the finish polishing auxiliary material in the finish polishing stage. Meanwhile, by setting the standard of the third preset roughness, the grinding time of the second grinding paste on the glue position surface of the optical lens mold core is prevented from being too long, and the surface roughness of the glue position surface of the optical lens mold core cannot be effectively reduced after reaching the third preset roughness (due to the limitation of the grinding granularity of the second grinding paste), so that the polishing period is prolonged, the polishing efficiency is reduced, and polishing auxiliary materials are wasted.
Step S400, dropping polishing liquid on a glue position surface with the surface roughness less than the third preset roughness, and precisely grinding the glue position surface with the polishing liquid dropped thereon by using polishing cloth until the surface roughness of the glue position surface is less than the fourth preset roughness, so as to determine that the polishing of the optical lens mold core is finished;
in this embodiment, step S400 is a finish polishing stage for polishing the mold core of the optical lens, and the polishing auxiliary materials corresponding to the finish polishing stage are the polishing cloth and the polishing solution. The polishing solution is a water-soluble polishing agent without any sulfur, phosphorus and chlorine additives, has good degreasing, rust prevention, cleaning and polishing performances, and can enable metal products to show real metal luster. Stable performance, no toxicity, no environmental pollution and the like. It is known to those skilled in the art that the polishing cloth may also be referred to as deer skin in the industry.
It should be noted that the value range of the fourth predetermined roughness is 0.8nm to 1.2nm, so that after the optical lens mold core is polished in the semi-finish polishing stage, the surface roughness of the obtained optical lens mold core reaches the third predetermined roughness, and the optical lens mold core is transferred to the finish polishing stage in step S400 to perform the last polishing procedure, the polishing liquid is dropped on the glue site surface with the surface roughness smaller than the third predetermined roughness, and the polishing cloth is used to finish-grind the glue site surface on which the polishing liquid is dropped until the surface roughness of the glue site surface is smaller than the fourth predetermined roughness, so that the polishing of the optical lens mold core is completed, and the surface roughness of the optical lens mold core can reach the nanometer precision requirement, thereby realizing the breakthrough of the performance of the optical curved surface of the intelligent glasses in the imaging aspect.
This embodiment is implemented by, in the rough polishing stage: adopting abrasive paper with the grinding granularity from coarse to fine in sequence, roughly polishing and grinding the glue position surface of the machined optical lens mold core until the surface roughness of the glue position surface is smaller than a first preset roughness, wherein the value range of the first preset roughness is 35nm to 45nm, and then entering a pre-grinding process of a semi-fine polishing stage: smearing a first grinding paste to a glue position surface with surface roughness smaller than a first preset roughness, pre-grinding the glue position surface smeared with the first grinding paste by using a horsebrush until the surface roughness of the glue position surface is smaller than a second preset roughness, wherein the grinding granularity size corresponding to the first grinding paste is 1-3 mu m, the value range of the second preset roughness is 20-25 nm, and then entering a semi-fine polishing grinding procedure in a semi-fine polishing stage: smearing a second grinding paste to a glue position surface with surface roughness smaller than a second preset roughness, performing semi-fine polishing and grinding on the glue position surface smeared with the second grinding paste by using mirror paper until the surface roughness of the glue position surface is smaller than a third preset roughness, wherein the grinding granularity size corresponding to the second grinding paste is smaller than 1 mu m, the value range of the third preset roughness is 8-12 nm, and finally entering a fine polishing stage: the polishing liquid is dripped on the glue position surface with the surface roughness smaller than the third preset roughness, the glue position surface on which the polishing liquid is dripped is finely ground by using polishing cloth, and the polishing of the optical lens mold core is determined to be finished until the surface roughness of the glue position surface is smaller than the fourth preset roughness, wherein the fourth preset roughness has a value range of 0.8nm to 1.2nm, so that the polishing process of the embodiment can enable the aspheric surface molding surface for manufacturing the intelligent glasses to meet the nanometer precision requirement by adopting different (specific) polishing auxiliary materials, polishing conditions and a standardized operation sequence in different polishing stages (including a rough polishing stage, a semi-finish polishing stage and a finish polishing stage), compared with the conventional polishing process, the polished surface roughness can only reach about 0.1 mu m (due to the selection of the polishing auxiliary materials and the polishing conditions in each polishing stage and the incapability of forming the standard operation sequence), the roughness far cannot meet the requirement of the optical lens, the polishing effect is poor, the consumption of the polishing auxiliary materials is large, the consumables are seriously wasted, the polishing process is unified, the polishing process is not beneficial to the large-scale polishing auxiliary materials, and the optical lens is not beneficial to the mass production. In the embodiment, the machined optical lens mold core is processed again, different polishing auxiliary materials, polishing conditions and a standardized operation sequence are adopted in different polishing stages (including a rough polishing stage, a semi-fine polishing stage and a fine polishing stage) by improving the traditional polishing mode, so that the surface roughness of the optical lens mold core reaches the nanometer level, the polishing period is greatly shortened while the surface roughness of the optical lens mold core is reduced, the production efficiency of high-precision optical lenses is improved, the labor intensity of polishing operation is reduced, the production cost of molds is reduced, the production difficulty of the high-precision optical lenses of the existing intelligent glasses is solved, and a foundation is laid for the development of the XR (Extended Reality) field.
Further, before the step S100, the step of roughly polishing and grinding the glue site surface of the machined optical lens mold core by sequentially using sand paper with a grinding particle size from coarse to fine comprises:
step C10, checking whether the glue position surface of the optical lens mold core after machining and forming has appearance defects, wherein the appearance defects comprise defects that the scratch depth of the glue position surface is larger than a first preset depth threshold value, and the value range of the first preset depth threshold value is 0.25mm to 0.4mm;
step C20, if not, performing the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially adopting abrasive paper with the grinding granularity from coarse to fine;
and step C30, if so, returning the optical lens mold core to the processing group corresponding to the machining of the machine for reworking so as to eliminate the appearance defects.
In this embodiment, the flaw of the glue position surface of the optical lens mold core may be a tool mark generated in the machining process, or a bump mark generated by an external object impacting the glue position surface of the optical lens mold core. It should be noted that, when the depth of the flaw on the molding surface is greater than the first preset depth threshold, it is indicated that it is difficult to repair the flaw by the polishing process of this embodiment, therefore, this embodiment inspects whether the molding surface of the mold insert of the optical lens after machining has an appearance defect, where the appearance defect includes a defect that the depth of the flaw on the molding surface is greater than the first preset depth threshold, and a value range of the first preset depth threshold is 0.25mm to 0.4mm, and if the appearance defect exists, the optical lens is returned to a machining group corresponding to the mold insert machining to perform rework to eliminate the appearance defect, so as to avoid that an excessively long time is spent to repair the flaw in the polishing process to cause an excessively long polishing period, reduce the production efficiency of the high-precision optical lens, and also avoid that in the polishing process, to repair the flaw more quickly, the grinding stress on the molding surface of the optical lens is increased to cause deformation of the molding insert of the optical lens.
Example two
Based on the foregoing embodiments of the present application, in another embodiment of the present application, the same or similar contents as those in the foregoing embodiment may be referred to the above description, and are not repeated herein. On the basis, referring to fig. 2, the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially using sand paper with the grinding granularity from coarse to fine comprises the following steps:
step 510, sequentially adopting 800-mesh, 1000-mesh and 1200-mesh sand paper to carry out third rough polishing and grinding on the glue position surface of the machined optical lens mold core;
step S520, after the third rough polishing and grinding are finished, whether the glue site surface after the third rough polishing and grinding is finished has substrate impurity defects is detected;
it should be noted that the substrate impurity defect is a bubble that emerges on the glue site surface and has a depth greater than a second preset depth threshold, and the value range of the second preset depth threshold is 0.8 μm to 1.2 μm. Specifically, the substrate impurity defect is that after rough polishing and grinding through machining and abrasive paper, bubbles in the material of the optical lens mold core emerge on the glue position surface, and the depth of the emerging bubbles is greater than a second preset depth threshold value.
In this embodiment, when the depth of the bubble emerging from the glue level surface is greater than the second predetermined depth threshold, it means that the substrate impurity defect is difficult to repair by the finer grit sandpaper (i.e., 1500 mesh, 2000 mesh, and 2500 mesh sandpaper) of this embodiment.
And step S530, if not, adopting 1500-mesh, 2000-mesh and 2500-mesh sand paper in sequence to perform rough polishing on the glue site surface after the third rough polishing is finished.
In this embodiment, if (i.e., if after the third rough polishing is finished, it is detected that the glue site surface after the third rough polishing is finished has the substrate impurity defect), the step of performing the third rough polishing on the glue site surface of the machined optical lens mold insert by sequentially using 800 mesh, 1000 mesh and 1200 mesh sandpaper is executed again until the substrate impurity defect is eliminated.
In this embodiment, 800-mesh, 1000-mesh and 1200-mesh abrasive papers are sequentially adopted to perform rough polishing and grinding on the glue site surface of the machined optical lens mold insert, after the rough polishing and grinding of the glue site surface is completed by the 800-mesh, 1000-mesh and 1200-mesh abrasive papers, whether the glue site surface has a substrate impurity defect is detected, after it is determined that the glue site surface does not have the substrate impurity defect, 1500-mesh, 2000-mesh and 2500-mesh abrasive papers are sequentially adopted to perform rough polishing and grinding on the glue site surface of the machined optical lens mold insert, so that the condition that the abrasive paper with a finer grinding particle size spends too long time to repair the substrate impurity defect is avoided, the polishing period is too long, the production efficiency of the high-precision optical lens is reduced, and meanwhile, the condition that the abrasive paper with a finer grinding particle size increases the grinding stress on the glue site surface of the optical lens mold insert to repair the substrate impurity defect more quickly in the grinding process, and the glue site surface is deformed.
EXAMPLE III
Based on the foregoing embodiments of the present application, in another embodiment of the present application, the same or similar contents to those of the foregoing embodiments may be referred to the above description, and are not repeated herein. On the basis, referring to fig. 3, the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially using sand paper with the grinding granularity from coarse to fine comprises the following steps:
step S110, determining the size of the head of a wood stick of the rough polishing auxiliary wood stick matched with the curvature of the curved surface according to the curvature of the glue position surface of the optical lens mold core after machining and forming;
in this embodiment, it should be noted that the larger the radian of the curved surface is, the smaller the size of the head of the stick is;
the size of the head of the auxiliary rough polishing stick matched with the curve radian can be obtained through querying through a preset curve radian mapping table. The preset mapping table of the radian of the curved surface stores the mapping relation between the radian of the curved surface and the size of the head of the wood stick.
Step S120, taking the rough polishing auxiliary wood stick corresponding to the matched wood stick head size as a target rough polishing auxiliary wood stick;
and S130, roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially adopting sand paper with the grinding granularity from coarse to fine and matching with the target roughly polishing auxiliary wood rod.
For example, referring to fig. 4, the step of determining the size of the head of the rough polishing auxiliary wood stick matched with the curvature of the curved surface according to the curvature of the glue position surface of the optical lens mold core after machining includes:
step S111, if the curvature of the glue position surface of the optical lens mold core after machining and forming is smaller than a preset curvature, determining that the head of the wood stick of the rough polishing auxiliary wood stick matched with the curvature of the curve is a cone, and the right-angle side of the cone is 3mm multiplied by 3mm;
it should be noted that the preset radian ranges from 8 degrees to 15 degrees.
Step S112, if the curvature of the glue position surface of the optical lens mold core after the machining is greater than or equal to the preset curvature, determining that the head of the wood stick of the rough polishing auxiliary wood stick matched with the curvature of the curve is a sphere, and the radius of the sphere is 1mm.
For the mold core of the aspheric surface lens of the intelligent glasses, the surface of the mold core is not in a circular arc shape, and the mold is unique in shape, so that the polishing of the mold core is quite difficult. Therefore, in the embodiment, the size of the head of the stick of the rough polishing auxiliary stick matched with the curved surface radian is determined according to the curved surface radian of the glue position surface of the optical lens mold core after machining, wherein the larger the curved surface radian is, the smaller the size of the head of the stick is, so that the head of the stick can be better matched with the curved surface radian of the glue position surface, so that the head of the stick can keep fit with the shape of the glue position surface with the aspheric surface, and the rough polishing auxiliary stick corresponding to the matched head size of the stick is used as the target rough polishing auxiliary stick, so that the abrasive paper with the grinding granularity from thick to thin is sequentially adopted, and the rough polishing auxiliary stick is matched with the target rough polishing auxiliary stick to perform rough polishing on the glue position surface of the optical lens mold core after machining, thereby avoiding the acute angle of the stick from contacting the glue position surface of the optical lens mold core to cause deep scratches, so that the adhesion of the abrasive paper with the glue position surface can be more compact and uniform, and the force can be more uniform.
Further, the step of rough polishing and grinding the glue position surface of the optical lens mold core after machining comprises:
step D10, controlling a preset included angle between the target rough polishing auxiliary wood rod and the glue position surface of the machined optical lens mold core, and performing fourth rough polishing grinding on the right angle area and the corner area of the glue position surface;
and D20, after the fourth rough polishing and grinding is finished, performing fifth rough polishing and grinding on a large surface area of the glue site surface subjected to the fourth rough polishing and grinding, wherein the value range of the preset included angle is 45-75 degrees.
In the embodiment, if the large surface area of the glue site surface is subjected to rough polishing and grinding, the sharp corner area and the corner area of the glue site surface are subjected to rough polishing and grinding, which easily causes the influence on the large surface area of the glue site surface after the sharp corner area and the corner area are subjected to rough polishing and grinding, and the large surface area of the glue site surface must be polished again, thereby causing unnecessary abrasion of the glue site surface and prolonging polishing time. Therefore, in the embodiment, the sharp corner area and the corner area of the glue position surface of the optical lens mold core after being machined and formed are firstly subjected to rough polishing and grinding, and after the sharp corner area and the corner area are subjected to rough polishing and grinding, the large area of the glue position surface is subjected to rough polishing and grinding, so that the deformation of the glue position surface caused by the long-time polishing of the large area of the glue position surface is avoided, the polishing period is shortened, and the polishing efficiency is improved.
In addition, this embodiment is through when carrying out the rough polishing and grinding, the supplementary stick of target rough polishing becomes to predetermine the contained angle with gluing the position face, the value scope of predetermineeing the contained angle is 45 degrees to 75 degrees to make the cladding carry out the application of force in the even glue position face of the abrasive paper of the supplementary stick of target rough polishing, improve the atress homogeneity of carrying out the rough polishing and grinding to gluing the position face, avoid the atress uneven and produce abrasive paper line defects such as abrasive paper granule mar.
In order to facilitate a thorough understanding of the present invention, a first embodiment of the present invention is described below, and it should be noted that numerous specific details are set forth in the first embodiment to provide a thorough understanding of the present invention. The invention may be embodied in many different forms than those described herein, and those skilled in the art will appreciate that the invention is not limited to the specific embodiments shown and described, and that the invention is not limited to the embodiments shown and described:
the first embodiment is as follows:
1. inspecting appearance, namely firstly, flatly placing the optical lens mold core on a magnetic table of a table top, then irradiating the glue position surface by using a highlight lamp at an angle of 45 degrees, inspecting the glue position surface at an angle of 30 degrees by sight, and determining the state of the glue position surface, wherein if the glue position surface has a flaw with the depth of more than 0.3mm, the flaw can not be repaired by polishing and needs to be reprocessed; if the depth is less than 0.3mm, the next step of polishing and grinding can be continuously carried out, namely, a rough polishing stage is carried out;
2. a rough polishing stage: the cork rods with different shapes are selected to be matched with sand paper for polishing according to the shape of the glue position surface, wherein the radian of the glue position surface is smaller than 10 degrees of aspheric mirror surface, the cork rods with the heads being triangular cones of 3mm multiplied by 3mm are adopted as the plane mirror surface, the radian of the glue position surface is larger than 10 degrees of aspheric mirror surface, and the cork rods with the head spherical diameters being 1mm are adopted.
Selecting proper auxiliary materials, polishing and grinding the optical lens mold core according to the sequence of the rubber position surface, namely a sharp angle area, a narrow area and a large surface, (wherein a cork stick forms an angle of 60 degrees with the rubber position surface during polishing), polishing the optical lens mold core by a difficult-to-easy grinding step, sequentially grinding by 800# -1000# -1200# -1500# -2000# -2500# abrasive paper, and grinding from left to right and from top to bottom during each grinding. Each piece of sand paper needs to pay attention to the surface cleanliness of the sand paper in the grinding process, and grinding dust is placed to block gaps of the sand paper, so that the cutting force is reduced. Wherein, the number of times of grinding of No. 800-1200 abrasive paper is 15-20, the grinding surface is cleaned by using a cleaning agent after each abrasive paper grinding is finished, and the inspection is carried out by using a strong light at an angle of 45 degrees to confirm that no abrasive paper particles scratch and substrate impurities exist.
If substrate impurities appear, the treatment mode is identified under a microscope, if the impurity points are larger than 0.1mm and the depth is larger than 1 mu m, the substrate is required to be processed again, if the impurity points are smaller than 0.1mm and the depth is smaller than 1 mu m, 1500-2000# abrasive paper grinding times are 10-15 times, after grinding of each abrasive paper is finished, a grinding surface is cleaned by using a cleaning agent, at the moment, a glue position surface gradually sees light, the fluorescent lamp is used for inspection, the inspection is carried out in a lighting lamp tube mode, the verticality of a vision lamp tube is identified (namely, whether the glue position surface deforms or not is identified through verticality detection of the vision lamp tube), 2500# abrasive paper grinding times are 8-10 times, after grinding of each abrasive paper, the grinding surface is cleaned by using the cleaning agent, after grinding, the grinding sand paper is used for inspecting grinding grains by using the microscope, and the white fog on particles and after grinding is ensured. Protecting the glue position surface by using a protective film, transferring the optical lens mold core to white light detection equipment to detect whether the surface roughness is less than 40nm, if the surface roughness is more than 40nm, repairing by using 3000# abrasive paper, then detecting, and grinding the optical lens mold core in the next step after confirming OK, namely entering a semi-fine polishing stage;
3. a semi-fine polishing stage: the method mainly comprises the steps of adopting a horse brush and mirror surface paper for polishing, firstly starting an electric polishing machine, adjusting the rotation speed of the polishing machine to 1300-1700r/min, installing the horse brush on an electric handle of the device, cleaning the horse brush by using a cleaning agent before using the horse brush, idling for 1 minute, then placing 8000# grinding paste on a mold core polishing surface, holding the electric handle vertically downwards, uniformly carrying out circle-drawing type grinding by using clockwise force, fixing the wrist by using an elbow as a supporting point, and avoiding excessive grinding in one centralized place to cause deformation of a glue position surface of an optical lens mold core. And after grinding, cleaning the optical lens mold core, checking the grinding state of the glue position surface under a microscope, after the glue position surface is checked to be qualified, protecting the glue position surface by using a protective film, and then transferring the optical lens mold core to white light detection equipment to detect whether the surface roughness is less than 20nm. After OK is confirmed, cleaning the optical lens mold core, placing 14000# grinding paste on a mold core polishing surface, wherein the amount of 1c square meter 14000# grinding paste is about 0.5mg, then taking out 50mm multiplied by 50mm polishing mirror paper in a dust-free bag, repeatedly folding the mirror paper into a square of 5mm multiplied by 5mm, placing the mirror paper on the grinding paste, wiping and grinding by clockwise circle type with the radius of 1cm, and taking the 50mm multiplied by 50mm area optical lens mold core as an example, the grinding time is 0.5H. Cleaning the optical lens mold core, protecting the glue position surface by using a protective film, then transferring the optical lens mold core to white light detection equipment to detect whether the surface roughness is less than 10nm, and entering a fine polishing stage if the surface roughness is less than 10 nm;
4. finish polishing stage (optical mirror polishing): the optical lens mold core is placed in a ten-thousand-level workshop for polishing operation, a rubber head dropper is dripped with polishing solution with the grain size of 0.1 mu m, a polishing cloth is cut into 10mm multiplied by 10mm, the optical lens mold core is placed on dust-free paper before use and is sprayed with a cleaning agent for cleaning once, the polishing cloth is inspected under a strong light after being thoroughly cleaned, the polishing cloth is ensured to be free from dust and dirt, then the rubber head dropper is flatly paved on the upper end of the polishing solution according to the amount of 3 drops of the polishing solution per 1c square meter, and the radius is 1cm for circle-type polishing and grinding. Taking an optical lens mold with an area of 50 x 50mm as an example, grinding for 1.5H, cleaning the optical lens mold, protecting the glue position surface with a protective film, then transferring the optical lens mold to a white light detection device to detect whether the surface roughness is less than 1nm, and finishing the polishing process if the surface roughness is less than 1 nm.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (10)
1. A method for polishing an optical lens mold insert, comprising the steps of:
the method comprises the following steps of performing rough polishing and grinding on a glue position surface of a machined optical lens mold core by sequentially adopting abrasive paper with the grinding granularity from coarse to fine until the surface roughness of the glue position surface is smaller than a first preset roughness, wherein the value range of the first preset roughness is 35nm to 45nm;
coating a first grinding paste on a glue position surface with surface roughness less than the first preset roughness, and pre-grinding the glue position surface coated with the first grinding paste by using a horsehair brush until the surface roughness of the glue position surface is less than a second preset roughness, wherein the corresponding grinding particle size of the first grinding paste is 1-3 mu m, and the value range of the second preset roughness is 20-25 nm;
coating a second grinding paste on a glue position surface with the surface roughness smaller than the second preset roughness, and performing semi-fine polishing and grinding on the glue position surface coated with the second grinding paste by using mirror paper until the surface roughness of the glue position surface is smaller than a third preset roughness, wherein the grinding granularity size corresponding to the second grinding paste is smaller than 1 mu m, and the value range of the third preset roughness is 8nm to 12nm;
and dropping the polishing liquid on a glue position surface with the surface roughness smaller than the third preset roughness, and precisely grinding the glue position surface with the polishing liquid dropped thereon by using polishing cloth until the surface roughness of the glue position surface is smaller than a fourth preset roughness, and determining that the polishing of the optical lens mold core is finished, wherein the value range of the fourth preset roughness is 0.8nm to 1.2nm.
2. The method for polishing an optical lens mold core according to claim 1, wherein the step of roughly polishing and grinding the glue site surface of the machined optical lens mold core by sequentially using sand paper with a grinding granularity from coarse to fine comprises:
checking whether the glue position surface of the optical lens mold core after machining and forming has an appearance defect, wherein the appearance defect comprises a defect that the scratch depth of the glue position surface is larger than a first preset depth threshold, and the value range of the first preset depth threshold is 0.25mm to 0.4mm;
if not, executing the step of roughly polishing and grinding the glue position surface of the machined optical lens mold core by sequentially adopting sand paper with the grinding granularity from coarse to fine.
3. The method for polishing an optical lens mold insert according to claim 2, wherein the step of inspecting whether the glue site surface of the machined optical lens mold insert has an appearance defect comprises:
if so, returning the optical lens mold core to the processing group corresponding to the machining of the machine for reworking so as to eliminate the appearance defect.
4. The method of claim 1, wherein the pre-polishing the glue surface coated with the first polishing paste with a horse brush comprises:
the method comprises the steps that a horse hair brush is driven by a polishing machine to rotate at a preset rotating speed, and the rubber position surface coated with first grinding paste is pre-ground through the rotating horse hair brush, wherein the preset rotating speed is 1300 r/min-1700 r/min.
5. The method for polishing an optical lens mold core according to claim 1, wherein the step of roughly polishing and grinding the glue site surface of the machined optical lens mold core by sequentially using sand paper with a grinding granularity from coarse to fine comprises:
carrying out first rough polishing on the glue position surface of the optical lens mold core after machining and forming by using abrasive paper with the first grinding granularity, and checking whether the glue position surface after the first rough polishing has sand paper grain defects or not;
and when the glue position surface after the first rough polishing and grinding does not have the sand paper line defect, performing second rough polishing and grinding on the glue position surface of the machined optical lens mold core by using sand paper with the grinding granularity of a second granularity, wherein the second granularity is smaller than the first granularity.
6. The method for polishing an optical lens mold core according to claim 1, wherein the step of roughly polishing and grinding the glue site surface of the machined optical lens mold core by sequentially using sand paper with a grinding granularity from coarse to fine comprises:
sequentially adopting 800-mesh, 1000-mesh and 1200-mesh sand paper to carry out third rough polishing and grinding on the glue position surface of the machined optical lens mold core;
after the third rough polishing and grinding are finished, detecting whether the glue site surface after the third rough polishing and grinding is finished has substrate impurity defects, wherein the substrate impurity defects are bubbles which emerge on the glue site surface and have a depth larger than a second preset depth threshold value, and the value range of the second preset depth threshold value is 0.8-1.2 mu m;
if not, adopting 1500-mesh, 2000-mesh and 2500-mesh sand paper in sequence to perform rough polishing on the glue site surface after the third rough polishing is finished.
7. The method for polishing an insert for an optical lens of claim 6, wherein the step of detecting whether the glue site surface has substrate defects after the third rough polishing step further comprises:
and if so, returning to execute the step of performing third rough polishing and grinding on the glue position surface of the machined optical lens mold core by sequentially adopting 800-mesh, 1000-mesh and 1200-mesh sand paper.
8. The method for polishing an optical lens mold core according to claim 1, wherein the step of roughly polishing and grinding the glue site surface of the machined optical lens mold core by sequentially using sand paper with a grinding granularity from coarse to fine comprises:
determining the size of the wood stick head of the rough polishing auxiliary wood stick matched with the curved surface radian according to the curved surface radian of the glue position surface of the optical lens mold core after machining and forming;
taking the rough polishing auxiliary wood stick corresponding to the matched wood stick head size as a target rough polishing auxiliary wood stick;
and (4) adopting sand paper with the grinding granularity from coarse to fine in sequence, matching with the target rough polishing auxiliary wood stick, and performing rough polishing grinding on the glue position surface of the machined optical lens mold core.
9. The method as claimed in claim 8, wherein the step of rough polishing the molding surface of the machined optical lens mold comprises:
controlling a preset included angle between the target rough polishing auxiliary wood rod and a glue position surface of the machined optical lens mold core, and performing fourth rough polishing grinding on a right angle area and a corner area of the glue position surface;
and after the fourth rough polishing and grinding is finished, performing fifth rough polishing and grinding on a large surface area of the glue site surface subjected to the fourth rough polishing and grinding, wherein the value range of the preset included angle is 45-75 degrees.
10. The method of polishing an optical lens mold insert according to claim 8, wherein the step of determining the stick head size of the rough polishing auxiliary stick that matches the curvature of the curved surface according to the curvature of the glue site surface of the optical lens mold insert after machining comprises:
if the curvature of the glue position surface of the optical lens mold core after machining and forming is smaller than a preset curvature, determining that the head of the wood stick of the rough polishing auxiliary wood stick matched with the curvature of the curve is a cone, and the right-angle side of the cone is 3mm multiplied by 3mm, wherein the value range of the preset curvature is 8-15 degrees;
if the curvature of the glue position surface of the optical lens mold core after machining is larger than or equal to the preset curvature, determining that the head of the wood stick of the rough polishing auxiliary wood stick matched with the curvature is a sphere, and the radius of the sphere is 1mm.
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