CN115284176A - Rapid trimming method for lens polishing model surface accuracy - Google Patents
Rapid trimming method for lens polishing model surface accuracy Download PDFInfo
- Publication number
- CN115284176A CN115284176A CN202210597814.2A CN202210597814A CN115284176A CN 115284176 A CN115284176 A CN 115284176A CN 202210597814 A CN202210597814 A CN 202210597814A CN 115284176 A CN115284176 A CN 115284176A
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- China
- Prior art keywords
- polishing
- arc
- die
- working surface
- shaped working
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- 238000005498 polishing Methods 0.000 title claims abstract description 148
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000009966 trimming Methods 0.000 title claims description 56
- 238000003754 machining Methods 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 2
- 239000010985 leather Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
Classifications
-
- 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
- B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
-
- 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
- B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
- B24B13/012—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools conformable in shape to the optical surface, e.g. by fluid pressure acting on an elastic membrane
-
- 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
- B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a method for quickly finishing the precision of a lens polishing die surface model, which utilizes the condition that the grinding amount from the edge to the center of the polishing die arc-shaped working surface is regularly changed due to the difference of the mutual operation tracks when the polishing die arc-shaped working surface and the polishing die arc-shaped working surface are finished, and can quickly finish the high-precision polishing die arc-shaped working surface model on the premise of not repairing the precision of the polishing die surface model (the surface model is changed to a certain extent and needs to be repaired after the general die surface model is placed for a long time), thereby machining a lens with a high-precision surface model.
Description
Technical Field
The invention relates to a method for quickly finishing the surface model precision of a lens polishing mold.
Background
In the optical spherical lens processing process, the surface shape precision of the arc-shaped working surface of the used polishing trimming die needs to be maintained frequently so as to ensure that the trimmed arc-shaped working surface of the polishing trimming die meets the high precision requirement of the lens surface shape, and after the surface shape precision is changed due to long-time non-use or other accidents of the polishing trimming die, the trimmed arc-shaped working surface of the polishing trimming die is generally poor, so that the surface shape precision of a processed lens product can not meet the requirement.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a method for quickly finishing the surface shape precision of a lens polishing die, which can quickly solve the problem of the surface shape precision of an arc-shaped working surface of the polishing die so as to quickly process a lens product with a high-precision surface shape.
The technical scheme is as follows: the invention relates to a method for quickly finishing the surface model precision of a lens polishing die, which comprises the following steps: identifying the surface shape precision characteristic of an arc-shaped working surface of a polishing die for processing the lens by utilizing the surface shape precision characteristic of the processed lens, selecting a motion track required when the arc-shaped working surface of the polishing die is finished according to the identified characteristic, when the processed lens surface has a central height (the central height refers to the condition that the central part of an actual curvature surface obtained after the lens is processed is more protruded than the central part of a standard curvature surface, namely the central grinding amount of the actual curvature surface of the lens is less than the edge grinding amount, so that the central part is protruded, namely the central height), driving the polishing trimming die to rotate by an external machine, enabling the arc-shaped working surface of the polishing die to be attached to the arc-shaped working surface of the polishing trimming die by pressure and slide forwards or backwards along a straight line direction relative to the arc-shaped working surface of the polishing die, processing the lens by using the finished polishing die after the front and back complete sliding for at least once, stopping finishing the arc-shaped working surface of the polishing die if the processed lens has the central height at the moment, and finishing the arc-shaped working surface of the polishing die by adopting the mode until the processed lens is qualified; when the processed lens surface has a low center (the low center means that the center part of an actual curvature surface obtained after the lens is processed is sunken compared with the center part of a standard curvature surface, namely the actual curvature surface center abrasion amount of the lens is more than the edge abrasion amount, so that the center part is sunken), the polishing trimming die is driven by an external machine to rotate, the arc-shaped working surface of the polishing die is attached to the arc-shaped working surface of the polishing trimming die by pressure and does circular motion relative to the arc-shaped working surface of the polishing die, after 5-10 s of motion, the lens is processed by the trimmed polishing die, if the center of the processed lens is normal, the trimming of the arc-shaped working surface of the polishing die is stopped, if the processed lens still has the low center, the trimming of the arc-shaped working surface of the polishing die is continued by adopting the mode until the processed lens of the polishing die is qualified.
Wherein, the caliber (the place with the widest inner diameter or the radius) of the arc-shaped working surface of the polishing trimming die is 5-10 mm larger than that of the arc-shaped working surface of the polishing die.
Wherein, the one-time complete sliding in the front and back direction means that the sliding is carried out after the Ma Xiang is erected after the sliding is carried out in the front direction.
When the polishing mould arc-shaped working surface slides forwards or backwards along a straight line direction, the limit position of the polishing mould arc-shaped working surface moving relative to the polishing repairing mould arc-shaped working surface is as follows: the caliber extension of the arc-shaped working surface of the polishing die exceeds the caliber extension of the polishing trimming die by 2-5 mm.
In the linear motion, the pressure is 5-10 kg, the sliding speed is 10-20 m/s, generally, the faster the sliding is, the stronger the force is, the larger the change amount of the surface shape is, because the removal amount of the arc surface is larger.
Wherein, in the circular motion, the pressure is 5-10 kg, and the rotating speed is 200-300 r/min.
Wherein, during circular motion, the extreme position that polishing mould arc working face moved to relatively polishing mould arc working face is: the caliber extension of the arc-shaped working surface of the polishing die exceeds the caliber extension of the polishing trimming die by 2-5 mm.
Has the advantages that: according to the method, the situation that the grinding amount from the edge to the center of the arc-shaped working surface of the polishing die is regularly changed due to the fact that the arc-shaped working surface of the polishing die and the arc-shaped working surface of the polishing trimming die are different in mutual moving tracks during trimming is utilized, and the high-precision arc-shaped working surface of the polishing die can be quickly trimmed on the premise that the precision of the surface model of the polishing trimming die is not repaired (the surface model is required to be repaired after the general trimming die is placed for a long time), so that a lens with a high-precision surface model can be machined.
Drawings
FIG. 1 is a schematic view of a linear motion trajectory path for trimming and polishing an arc-shaped working surface of a mold;
FIG. 2 is a view of the polishing mold exceeding the caliber extension of the polishing mold trimming by 2-5 mm in the movement trace line of FIG. 1;
FIG. 3 is a schematic view of a circular motion trajectory path for trimming and polishing an arc-shaped working surface of a polishing mold;
FIG. 4 is a view of the polishing mold exceeding the polishing mold trimming caliber extension by 2-5 mm in the movement trace line of FIG. 3;
FIG. 5 is a schematic view of a polishing mold for processing a lens;
FIG. 6 is a comparison of the precision characteristics of different surface types of the processed lens; FIG. 6a is an interference image with a low center of the lens profile; FIG. 6b is an interference image of the lens face center height; fig. 6c shows an interference image of an ideal surface shape of the lens.
Detailed Description
As shown in fig. 1-2, the method for rapidly finishing the precision of the lens polishing model of the present invention specifically comprises: selecting a moving track for trimming the arc-shaped working surface of the polishing die according to the surface type characteristics (the condition of high center or low center) of the lens processed by the arc-shaped working surface of the polishing die and the relationship between the moving track and the edge-to-center grinding amount of the arc-shaped working surface of the polishing die, wherein the lens surface type characteristics are reflected in the interference pattern (as shown in figure 6b, if the lens interference pattern shows that the center of the lens surface type is high, then the arc-shaped working surface of the polishing die needs to be trimmed in a linear motion mode, as shown in figure 6a, if the lens interference pattern shows that the center of the lens surface type is low, then the arc-shaped working surface of the polishing die needs to be trimmed in a circular motion mode); starting a machine to finish the arc-shaped working surface of the polishing die according to a selected track, wherein the caliber of the arc-shaped working surface of the polishing die is 5-10 mm larger than that of the arc-shaped working surface of the polishing die. A motion track I: the front and back straight movement tracks, the movement track of the arc-shaped working surface of the polishing die is relative to the arc-shaped working surface of the polishing trimming die rotating at a high speed, the position limit of the front and back movement tracks is that the caliber extension of the arc-shaped working surface of the polishing die exceeds the caliber extension of the polishing trimming die by 2-5 mm, under a certain pressure and a certain sliding speed (5 kg of pressure and 10m/s of sliding speed), the surface accuracy of the arc-shaped working surface of the polishing die is indirectly improved by about 0.1 (the accuracy refers to the irregularity of the surface shape and is similar to the percentage meaning, the assumption is that the surface irregularity of the arc-shaped working surface of the polishing die is 1, the integral one-time movement trimming is greatly improved by about 10%, and the rest 90% is gradually improved, until the surface irregularity is 0), under the motion trail, because the linear velocity from the center to the edge of the arc-shaped working surface of the polishing trimming die is gradually increased, when the arc-shaped working surface of the polishing die makes linear motion relative to the arc-shaped working surface of the polishing trimming die, the cutting force generated by the polishing leather loaded on the arc-shaped working surface of the polishing die by the arc-shaped working surface of the polishing trimming die is gradually reduced from the edge to the center, namely, the edge trimming amount of the arc-shaped working surface of the polishing die is more, the trimming amount of the central part is less, the center of the lens surface processed by the polishing die is low, if the lens surface processed by the previous polishing die has the center-high phenomenon, the lens surface is just offset, and the accuracy of the surface of the arc-shaped working surface of the polishing die is indirectly trimmed. A second motion track: the position limit of the circular motion is that the caliber extension of the arc-shaped working surface of the polishing die exceeds the caliber extension of the polishing trimming die by 2-5 mm, generally speaking, under a certain rotating speed and pressure (pressure is 5 kg, rotating speed is 200 r/min), the arc-shaped working surface of the polishing trimming die is trimmed for about 10 seconds to the arc-shaped working surface (polishing skin) of the polishing die, the surface shape of the arc-shaped working surface of the polishing die can be indirectly improved by about 0.1, the cutting force generated by the polishing skin loaded on the arc-shaped working surface of the polishing die when the polishing trimming die performs the circular motion to the arc-shaped working surface of the polishing die is gradually increased from the edge to the center, namely, the edge trimming amount is less, more trimming amount is generated in the center part, the surface shape of the lens machined by the polishing die has a high center phenomenon, and if the lens machined before has a low center phenomenon, the lens is just offset, which indicates that the precision of the arc-shaped working surface shape of the polishing die is indirectly trimmed.
As shown in fig. 1, 2 and 6b, when the interference image corresponding to the surface type of the processed lens has a central height, selecting a finishing operation track of the polishing mold to be finished, fixing the handle part of the polishing mold 1 to a machine by using an intermediate jig, fixing the handle of the polishing mold 2 by using a pressure shaft on the machine, adjusting the pressure, the sliding speed and the number of times, starting the machine, enabling the arc-shaped working surface of the polishing mold 2 to be attached to the arc-shaped working surface of the polishing mold 1, then performing forward and backward linear motion for several times along a straight line, wherein the operation track enables the edge of the arc-shaped working surface of the polishing mold to be polished to have a large amount and a small central polishing amount, fixing the handle part of the finished polishing mold 2 to a main shaft of the machine, starting the machine to process the lens 5, observing the interference image of the processed lens 5, and repeatedly verifying the surface type precision of the repaired polishing mold until the ideal state is reached.
As shown in fig. 3, 4 and 6a, the surface type of the processed lens corresponds to the interference image and has a low center condition, the trimming operation track of the polishing mold to be trimmed is selected, the handle part of the polishing mold 1 is fixed on the machine by using an intermediate fixture, the handle of the polishing mold 2 is fixed by using a pressure shaft on the machine, the pressure and the rotating speed are adjusted, then the machine is started, the arc-shaped working surface of the polishing mold 2 is attached to the arc-shaped working surface of the polishing mold 1 and then performs circular motion, the operation track can reduce the grinding amount of the edge of the arc-shaped working surface of the polishing mold, the center grinding amount is large, the trimmed handle part of the polishing mold 2 is fixed on a main shaft of the machine by using the intermediate fixture, the machine is started to process the lens 5 arranged in the tool fixture 6, the interference image of the processed lens 5 is observed, and the surface type precision condition of the repaired polishing mold is repeatedly verified until the ideal state is reached.
Claims (7)
1. A method for quickly finishing the precision of a lens polishing model surface is characterized by comprising the following steps: identifying the surface shape precision characteristic of an arc-shaped working surface of a polishing die for processing the lens by utilizing the surface shape precision characteristic of the processed lens, selecting a motion track required when the arc-shaped working surface of the polishing die is trimmed according to the identified characteristic, when the processed lens surface has a high center, driving the polishing trimming die to rotate under the driving of an external machine, enabling the arc-shaped working surface of the polishing die to be attached to the arc-shaped working surface of the polishing trimming die by pressure and slide forwards or backwards along a straight line direction relative to the arc-shaped working surface of the polishing die, and after the arc-shaped working surface of the polishing die slides forwards and backwards completely at least once, processing the lens by using the trimmed polishing die, if the center of the processed lens is normal, stopping trimming the arc-shaped working surface of the polishing die, if the processed lens still has the high center, continuing to trim the arc-shaped working surface of the polishing die by adopting the mode until the processed lens of the polishing die is qualified; when the processed lens surface type has the condition that the center is low, the polishing trimming die is driven by an external machine to rotate, the arc-shaped working surface of the polishing trimming die is attached to the arc-shaped working surface of the polishing trimming die by pressure and does circular motion relative to the arc-shaped working surface of the polishing trimming die, after 5-10 seconds of motion, the trimmed polishing trimming die is used for processing the lens, if the center of the processed lens is normal, trimming of the arc-shaped working surface of the polishing trimming die is stopped, if the center of the processed lens is still low, trimming of the arc-shaped working surface of the polishing trimming die is continued by adopting the mode until the processed lens of the polishing trimming die is qualified.
2. The method for rapidly finishing the accuracy of a lens polishing model according to claim 1, wherein: the diameter of the arc-shaped working surface of the polishing trimming die is 5-10 mm larger than that of the arc-shaped working surface of the polishing trimming die.
3. The method for rapidly finishing the accuracy of a lens polishing model according to claim 1, wherein: the one-time front-back complete sliding refers to the sliding of Ma Xiang after the forward sliding.
4. The method for rapidly finishing the accuracy of a lens polishing model according to claim 1, wherein: when the polishing mould slides forwards or backwards along a straight line direction, the limit position to which the polishing mould arc-shaped working surface moves relative to the polishing mould arc-shaped working surface is as follows: the caliber extension of the arc-shaped working surface of the polishing die exceeds the caliber extension of the polishing trimming die by 2-5 mm.
5. The method for rapidly modifying the accuracy of a lens polishing model according to claim 4, wherein: in the linear motion, the pressure is 5-10 kg, and the sliding speed is 10-20 m/s.
6. The method for rapidly dressing the accuracy of a lens polishing pattern according to claim 1, wherein: during circular motion, the limit position of the polishing die arc-shaped working surface moving relative to the polishing trimming die arc-shaped working surface is as follows: the caliber extension of the arc-shaped working surface of the polishing die exceeds the caliber extension of the polishing trimming die by 2-5 mm.
7. The method for rapidly modifying the accuracy of a lens polishing model according to claim 6, wherein: in the circular motion, the pressure is 5-10 kg, and the rotation speed is 200-300 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210597814.2A CN115284176A (en) | 2022-05-30 | 2022-05-30 | Rapid trimming method for lens polishing model surface accuracy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210597814.2A CN115284176A (en) | 2022-05-30 | 2022-05-30 | Rapid trimming method for lens polishing model surface accuracy |
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| CN115284176A true CN115284176A (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210597814.2A Pending CN115284176A (en) | 2022-05-30 | 2022-05-30 | Rapid trimming method for lens polishing model surface accuracy |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116460667A (en) * | 2022-12-30 | 2023-07-21 | 北京创思工贸有限公司 | Processing method of calcium fluoride optical part |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0286027A2 (en) * | 1987-04-04 | 1988-10-12 | Ernst Saljé | Method of and device for dressing grinding wheels |
| JPH03294177A (en) * | 1990-04-12 | 1991-12-25 | Nakamuratome Seimitsu Kogyo Kk | Correcting device for grinding wheel shape of spherical grinding machine |
| JPH06297314A (en) * | 1993-04-09 | 1994-10-25 | Olympus Optical Co Ltd | Electrolytic in-process dressing grinding device |
| JPH1110504A (en) * | 1997-06-24 | 1999-01-19 | Canon Inc | Manufacture of spherical shape form grinding tool |
| WO2003059573A1 (en) * | 2002-01-15 | 2003-07-24 | Seiko Epson Corporation | Polishing method and polishing device |
| CN203611095U (en) * | 2013-11-20 | 2014-05-28 | 北京国晶辉红外光学科技有限公司 | A novel die applicable to high-precision spherical fairing polishing |
| CN104385080A (en) * | 2014-11-24 | 2015-03-04 | 成都精密光学工程研究中心 | Polishing die surface shape modification device |
| CN107253132A (en) * | 2017-08-01 | 2017-10-17 | 贰陆光学（苏州）有限公司 | A kind of optical mirror slip burnishing device and glossing |
| CN207309625U (en) * | 2017-08-26 | 2018-05-04 | 鞍山市激埃特光电有限公司 | Small-bore convex lens polishing grinding device |
| CN109648429A (en) * | 2018-12-25 | 2019-04-19 | 云南北方驰宏光电有限公司 | A kind of cylindrical mirror processing method based on numerical control machining center |
-
2022
- 2022-05-30 CN CN202210597814.2A patent/CN115284176A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0286027A2 (en) * | 1987-04-04 | 1988-10-12 | Ernst Saljé | Method of and device for dressing grinding wheels |
| JPH03294177A (en) * | 1990-04-12 | 1991-12-25 | Nakamuratome Seimitsu Kogyo Kk | Correcting device for grinding wheel shape of spherical grinding machine |
| JPH06297314A (en) * | 1993-04-09 | 1994-10-25 | Olympus Optical Co Ltd | Electrolytic in-process dressing grinding device |
| JPH1110504A (en) * | 1997-06-24 | 1999-01-19 | Canon Inc | Manufacture of spherical shape form grinding tool |
| WO2003059573A1 (en) * | 2002-01-15 | 2003-07-24 | Seiko Epson Corporation | Polishing method and polishing device |
| CN203611095U (en) * | 2013-11-20 | 2014-05-28 | 北京国晶辉红外光学科技有限公司 | A novel die applicable to high-precision spherical fairing polishing |
| CN104385080A (en) * | 2014-11-24 | 2015-03-04 | 成都精密光学工程研究中心 | Polishing die surface shape modification device |
| CN107253132A (en) * | 2017-08-01 | 2017-10-17 | 贰陆光学（苏州）有限公司 | A kind of optical mirror slip burnishing device and glossing |
| CN207309625U (en) * | 2017-08-26 | 2018-05-04 | 鞍山市激埃特光电有限公司 | Small-bore convex lens polishing grinding device |
| CN109648429A (en) * | 2018-12-25 | 2019-04-19 | 云南北方驰宏光电有限公司 | A kind of cylindrical mirror processing method based on numerical control machining center |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116460667A (en) * | 2022-12-30 | 2023-07-21 | 北京创思工贸有限公司 | Processing method of calcium fluoride optical part |
| CN116460667B (en) * | 2022-12-30 | 2023-11-07 | 北京创思工贸有限公司 | Processing method of calcium fluoride optical part |
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