CN203611119U - Consolidation material-grinding pad for grinding and polishing of spherical workpiece - Google Patents
Consolidation material-grinding pad for grinding and polishing of spherical workpiece Download PDFInfo
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- CN203611119U CN203611119U CN201320790596.0U CN201320790596U CN203611119U CN 203611119 U CN203611119 U CN 203611119U CN 201320790596 U CN201320790596 U CN 201320790596U CN 203611119 U CN203611119 U CN 203611119U
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- 238000000227 grinding Methods 0.000 title claims abstract description 62
- 238000005498 polishing Methods 0.000 title claims abstract description 61
- 238000007596 consolidation process Methods 0.000 title abstract 3
- 239000002245 particle Substances 0.000 claims abstract description 17
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 5
- 239000003082 abrasive agent Substances 0.000 claims description 37
- 239000006061 abrasive grain Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 12
- 238000003754 machining Methods 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 3
- 239000011347 resin Substances 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000000654 additive Substances 0.000 description 13
- 230000000996 additive effect Effects 0.000 description 13
- 239000003795 chemical substances by application Substances 0.000 description 10
- 238000007711 solidification Methods 0.000 description 10
- 230000008023 solidification Effects 0.000 description 10
- 239000002994 raw material Substances 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000001029 thermal curing Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 230000003746 surface roughness Effects 0.000 description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 229910003460 diamond Inorganic materials 0.000 description 6
- 239000010432 diamond Substances 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 229910010271 silicon carbide Inorganic materials 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 3
- 229910000420 cerium oxide Inorganic materials 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
A consolidation material-grinding pad for grinding and polishing of a spherical workpiece is characterized by being formed by a spherical base layer (2) and a material grinding layer (1) which is consolidated on the spherical base layer (2); the material grinding layer (1) is formed by a plurality of protruding structures; dust accommodating grooves which are used for collecting the polishing fluid, grinding dust and grinding particles are formed between the protruding structures; the closer to a vertex of the polishing pad the grinding particles are, the smaller the density of the grinding particles is, wherein the grinding particles are formed on the surfaces of the protruding structures. The consolidation material-grinding pad for grinding and polishing of the spherical workpiece has the advantages of being simple in production process, high in machining efficiency, stable in process, high in surface accuracy and good in surface quality.
Description
Technical field
The utility model relates to a kind of Machining Technology, especially a kind of grinding and polishing technology of spherical parts, specifically a kind of sphere workpiece grinding and polishing concretion abrasive pad.
Background technology
At present, along with developing rapidly of modern science and technology, the especially development of optical guidance technology, hemispherical optical element is widely used in the window of aircraft, window and the guided missile head-shield etc. of advanced weaponry optical guidance system.The major function of radome fairing is in high-speed flight, and air is carried out to rectification, and plays the effect of optical window simultaneously.Above-mentioned functions has proposed very high requirement to its surface quality.The materials such as sapphire, magnesium fluoride and spinelle are used widely with its high rigidity, high-wearing feature, highly corrosion resistant, high heat-resisting quantity and good infrared, ultraviolet light transmission.For the higher hard brittle material of these surface requirements, grinding and polishing is its only resource of processing eventually.Process one of most important instrument and grinding and polishing pad is grinding and polishing, determined the final crudy of device, working (machining) efficiency and processing cost.
At present, the grinding technics of sphere radome fairing workpiece mainly adopts ball sheet slightly to grind and lappingout, and polishing adopts the processing of cerium oxide free abrasive.Daytime is bright has proposed a kind of speed lapping method (daytime is bright, sphere grinding tool conformal wearing and tearing speed lappings [master thesis], 2004) of sphere grinding tool conformal wearing and tearing.Utilize ball sheet to be bonded to dish, on sphere high-speed grinder, adopt forming manufacturing sphere workpiece.Inquired into the theory that realizes sphere grinding tool conformal wearing and tearing, according to this Theoretical Design the sphere grinding tool of conformal wearing and tearing.Mainly there is following several respects problem in above-mentioned processing method: 1) ball sheet slightly grind with lapping technique in, instrument all adopts ball sheet by certain figure formation dish, operation is complicated, bonding figure varies with each individual, uniformity is poor; 2) the ball sheet instrument after stickup and net shape require to differ larger, repair dish difficulty; 3) when polishing, polishing fluid is difficult to enter the top of workpiece, causes top material to remove speed inconsistent with other position, and working (machining) efficiency and face shape are difficult to assurance.Nanjing English starlight is learned Instrument Ltd. and has been proposed a kind of spherical optics element processing solidified abrasive grinding polishing pad (CN102658522A), it is characterized in that abrasive material and thermosetting resin evenly mix, after solidifying, form sphere solidified abrasive grinding polishing pad, abrasive material: the mass percent of resin is 5%～50%: 50%～95%.But solidified abrasive grinding polishing pad is one deck structure in this patent, and without the projection pattern of optimizing.For this reason, develop simply efficient, the bonding convenience of a kind of preparation method, high conformity and working (machining) efficiency is high, workpiece quality is good and the concretion abrasive ball ring that meets green manufacturing theory is necessary.
Summary of the invention
The purpose of this utility model is can not adapt to spherical parts grinding and polishing needs for existing grinding and polishing pad, and exist simple in structure, inefficient problem, design the sphere workpiece grinding and polishing concretion abrasive pad that a kind of working (machining) efficiency is high, preparation process is workable, a kind of its preparation method is provided simultaneously.
The technical solution of the utility model is:
A kind of sphere workpiece grinding and polishing concretion abrasive pad, it is characterized in that it is made up of sphere base layer 2 and the abrasive material 1 being cemented on base layer 2, described abrasive material 1 is made up of polylith bulge-structure, is formed for collecting the chip pocket of polishing fluid, abrasive dust and abrasive particle between each bulge-structure; The abrasive grain density on bulge-structure surface the closer to pad summit place is less.
The thickness of described base layer is 0.2-2 millimeter, and described bulge-structure is rectangular, triangle, annular, circle or trapezoidal, and its height is between 0.5-5 millimeter.
The beneficial effects of the utility model:
Grinding and polishing pad of the present utility model can be widely used in the grinding and polishing processing of the hemispherical optical component such as window and guided missile head-shield of window, the advanced weaponry optical guidance system of aircraft, and processing characteristics is more stable, working (machining) efficiency is high, machined surface quality, surface precision are high.
Concretion abrasive ball ring of the present utility model adopts the raised design of optimizing, and even wear is relatively good, and not malleable of face type has improved stability and the machining accuracy of processing, can long time continuous working, improve working (machining) efficiency.
Concretion abrasive ball ring manufacturing process of the present utility model is simple, and the spherical mould size while only needing to change regelate can quick Fabrication goes out to be applicable to the grinding and polishing pad of different radii concave-convex ball bin device fabrication.
Concretion abrasive ball ring of the present utility model is lower to the requirement of process equipment, and working (machining) efficiency is high.
Concretion abrasive ball ring of the present utility model can water as grinding and polishing liquid, not only cost is low, and can be to environment, meets the requirement of current green manufacturing.
Accompanying drawing explanation
Fig. 1 is the structural representation of concretion abrasive ball ring of the present utility model.
Fig. 2 is the structural representation of plane mould of the present utility model and cover plate.
Fig. 3 is the top view of plane mould of the present utility model.
Fig. 4 is the structural representation of sphere shaper of the present utility model.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
Embodiment mono-.
As shown in Figure 1.
A kind of sphere workpiece grinding and polishing concretion abrasive pad, it is made up of sphere base layer 2 and the abrasive material 1 being cemented on base layer 2, described abrasive material 1 is made up of polylith bulge-structure 9, is formed for collecting the chip pocket 10 of polishing fluid, abrasive dust and abrasive particle between each bulge-structure 9; Abrasive grain density the closer to bulge-structure 9 surfaces at polishing pad summit place is less.As shown in Figure 1, the thickness of base layer 2 can be 0.2-2 millimeter, and described bulge-structure 9 can be rectangular, triangle, annular, circle or trapezoidal, and its height can be between 0.5-5 millimeter.In order to realize uniform polish, when concrete enforcement, also can realize by abrasive material density and the pattern of controlling polishing pad abrasive material, be that the aliquot that abrasive material raw material is step distribution by some parts of abrasive material density forms, abrasive material density realizes by the protruding size in Fig. 3 and spacing distance, and the inner side of concretion abrasive pad and the density of outer rim are low compared with other place.From Fig. 3 (top view of hemisphere), (the Ji Tu3 center, inner side of concretion abrasive pad, be equivalent to the vertex position place of hemisphere) with outer rim (be the cylindrical of Fig. 3, be equivalent to hemisphere near planar cross-sectional position) density low compared with other place, simultaneously as can be seen from Figure 3, ball inner face has been divided into multiple (four) identical sector region (projection).
Embodiment bis-.
As Figure 1-4
A manufacture method for concretion abrasive pad for sphere workpiece grinding and polishing, it comprises the following steps:
First, design the plane mould 3 with fluted 5 according to the shape of the bulge-structure 9 of expansion graph of spherical face and designed composition abrasive material 1, around described plane mould 3, should design the enclosure 4 that height is suitable with basic layer 2 thickness; As shown in Figure 2,3
Secondly, preparation abrasive material and base layer raw material; Abrasive material raw material is fully mixed and is formed by abrasive material, binding agent, various property regulation additive and curing agent, accelerator etc., identical with existing abrasive material, base layer raw material is evenly mixed by binding agent, talcum powder, all kinds of properties modifier and curing agent, accelerator etc., also same as the prior art;
The 3rd, abrasive material raw material is spread upon equably in the groove 5 of plane mould, make abrasive material raw material be full of fluted and compacting make it to flush with the end face of groove;
The 3rd, base layer raw material is added in the space that described enclosure 4 forms, and the base layer raw material that adds of compacting and the upper surface flush of enclosure 4;
The 4th, utilize the cover plate 6 matching with plane mould profile to cover plane mould 3, carry out primary solidification, solidification temperature can be carried out with reference to the solidification temperature of relevant handbook or existing polishing pad, controls the primary solidification time between 12-30 minute, obtains plane pad; Should guarantee that the plane polishing spacer after initial solidification has enough toughness, can make it to become by sphere grinding tool pressurization spherical, and can adapt to the sphere of various different radiis;
The 5th, plane pad after primary solidification is put into the sphere sizing grinding tool being formed by punch 7 and die 8, as shown in Figure 4, heating pressurization, carry out regelate, the temperature of heating can be with reference to relevant handbook or existing polishing pad manufacture method, so that plane polishing pad occurs to soften, moulding pressure can determine by the test adjustment of limited sudden strain of a muscle, the control regelate time is not less than 2 hours, can obtain the enough rigidity that has shown in Fig. 1, not yielding, the sphere workpiece grinding concretion abrasive polishing pad that can substantially coincide with workpiece face type to be processed and metal base.
The shape of groove 5 wherein can be rectangular, triangle, annular, circle or trapezoidal, and the degree of depth is between 0.5-5 millimeter.
In order to realize uniform polish, when concrete enforcement, also can realize by abrasive material density and the pattern of controlling polishing pad abrasive material, be that the aliquot that abrasive material raw material is step distribution by some parts of abrasive material density forms, abrasive material density realizes by the protruding size in Fig. 3 and spacing distance, and the inner side of concretion abrasive pad and the density of outer rim are low compared with other place.From Fig. 3 (top view of hemisphere), (the Ji Tu3 center, inner side of concretion abrasive pad, be equivalent to the vertex position place of hemisphere) with outer rim (be the cylindrical of Fig. 3, be equivalent to hemisphere near planar cross-sectional position) density low compared with other place, simultaneously as can be seen from Figure 3, ball inner face has been divided into multiple (four) identical sector region (projection).
Example 1:
A kind of solidified abrasive grinding pad that is suitable for the grinding of spinelle sphere workpiece, it is by diamond, carborundum, copper powder, the evenly mixing cured rear formation of resin and other performance additive, its preparation method is: (abrasive material) takes the diamond 150g that particle diameter is 200 ~ 230 order plating nickel on surface, taking particle diameter is the carborundum 30g of W40, taking particle diameter is 500 object copper powder 50g, take resin 200g, take other performance additive 12.5g, after above-mentioned substance is evenly mixed, add thermal curing agents and accelerator again to stir, then evenly being applied in preprepared plane mould, (base layer) takes resin 50g, takes performance additive 2g, takes talcum powder 50g, and above-mentioned substance is evenly mixed, and adds thermal curing agents and accelerator again to stir, and is then evenly being applied to abrasive material surface, cover mold, heat 12 minutes primary solidification, put into spherical mould regelate 2 hours, can obtain being applicable to the concretion abrasive ball ring of sphere grinding and polishing.
The above-mentioned concretion abrasive sphere preparing is adhered on abrasive disk, on polishing machine, slightly grind the test of sphere spinelle workpiece, grinding pressure is 0.1MPa, the rotating speed of abrasive disk is 900rpm, polishing fluid is that deionized water does not contain any abrasive material, and polishing fluid flow is 1000ml/min, grinds after 5 minutes through detecting, material removing rate is 60um/min, and the surface roughness Ra of workpiece is 859nm.
Change above-mentioned grinding pressure into 0.08MPa, grind after 5 minutes in the situation of other conditions and parameter constant, material removing rate is 50um/min after testing, and surface roughness Ra is 795nm.
Example 2:
A kind of solidified abrasive grinding pad that is suitable for the grinding of sphere workpiece, it is by diamond, carborundum, copper powder, graphite, the evenly mixing cured rear formation of resin and other performance additive, its preparation method is: (abrasive material) takes the diamond 120g that particle diameter is W28 plated surface ambrose alloy, taking particle diameter is the carborundum 20g of W10, taking particle diameter is 500 object copper powder 30g, take resin 150g, take graphite 4g, take other performance additive 10.5g, after above-mentioned substance is evenly mixed, add thermal curing agents and accelerator again to stir, then be applied to equably in plane mould, (base layer) takes resin 50g, takes performance additive 2g, takes talcum powder 50g, and above-mentioned substance is evenly mixed, and adds thermal curing agents and accelerator again to stir, and is then applied to equably abrasive material surface, cover mold, heat 14 minutes primary solidification, put into spherical mould regelate 2 hours, can obtain being applicable to the solidified abrasive grinding ball ring that sphere grinds.
The above-mentioned solidified abrasive grinding pad preparing is adhered on abrasive disk, on polishing machine, carry out the test of lappingout sphere K9 glass, workpiece before lappingout was slightly ground by 200 ~ 230 grinding pad, and grinding pressure is 0.1MPa, and the rotating speed of abrasive disk is 900rpm, polishing fluid is that deionized water does not contain any abrasive material, with ethylenediamine adjusting PH to 11, polishing fluid flow is 1000ml/min, grinds after 5 minutes through detecting, material removing rate is 35um/min, and the surface roughness Ra of workpiece is 52nm.
Change above-mentioned grinding pressure into 0.06MPa, grind after 5 minutes in the situation of other conditions and parameter constant, material removing rate is 25um/min after testing, and surface roughness Ra is 45nm.
Example 3:
A kind of solidified abrasive grinding pad that is suitable for sphere lappingout, it is by diamond, carborundum, copper powder, graphite, the evenly mixing cured rear formation of resin and other performance additive, its preparation method is: (abrasive material) takes the diamond 120g that particle diameter is W14 plating nickel on surface, taking particle diameter is the carborundum 20g of W10, taking particle diameter is 500 object copper powder 30g, take resin 150g, take graphite 4g, take other performance additive 10.5g, after above-mentioned substance is evenly mixed, add thermal curing agents and accelerator again to stir, then be applied to equably in plane mould, (base layer) takes resin 50g, takes performance additive 2g, takes talcum powder 50g, and above-mentioned substance is evenly mixed, and adds thermal curing agents and accelerator again to stir, and is then applied to equably abrasive material surface, cover mold, heat 15 minutes primary solidification, put into spherical mould regelate 2 hours or more than, can obtain being applicable to the solidified abrasive grinding pad of sphere fine grinding.
The above-mentioned concretion abrasive ball ring preparing is adhered on abrasive disk, on polishing machine, carry out the test of lappingout sphere K9 glass, workpiece before lappingout was slightly ground by 200 ~ 230 grinding pad, and grinding pressure is 0.08MPa, and the rotating speed of abrasive disk is 900rpm, polishing fluid is that deionized water does not contain any abrasive material, with ethylenediamine adjusting PH to 11, polishing fluid flow is 1000ml/min, grinds after 10 minutes through detecting, material removing rate is 8um/min, and the surface roughness Ra of workpiece is 13nm.
Change above-mentioned grinding pressure into 0.04MPa, grind after 10 minutes in the situation of other conditions and parameter constant, material removing rate is 4.5um/min after testing, and surface roughness Ra is 9nm.
Example 4:
A kind of concretion abrasive polishing pad that is suitable for the polishing of sphere workpiece, it is by evenly mixing cured rear formation of cerium oxide, resin and other performance additive, its preparation method is: (abrasive material) takes the cerium oxide 200g that particle diameter is 1.5um surface modification, take resin 150g, take other performance additive 10.5g, after above-mentioned substance is evenly mixed, add thermal curing agents and accelerator again to stir, be then applied to equably in plane mould; (base layer) takes resin 50g, takes performance additive 2g, takes talcum powder 50g, and above-mentioned substance is evenly mixed, and adds thermal curing agents and accelerator again to stir, and is then applied to equably abrasive material surface, cover mold; Heat 30 minutes primary solidification, put into spherical mould secondary solid 2 hours or more than, can obtain being applicable to the solidified abrasive grinding polishing pad of sphere grinding and polishing.
The above-mentioned concretion abrasive polishing pad preparing is adhered on polishing disk, on polishing machine, carry out the test of polished ball face K9 glass, workpiece before polishing is by the grinding pad lappingout mistake of W14, and polish pressure is 0.05MPa, and the rotating speed of abrasive disk is 900rpm, polishing fluid is that deionized water does not contain any abrasive material, with ethylenediamine regulate PH to 11, polishing fluid flow is 100ml/min, polishing after 10 minutes through detect, material removing rate is 1um/min, and the surface roughness Ra of workpiece is 0.41 ~ 0.52nm.
The utility model does not relate to partly all prior aries that maybe can adopt same as the prior art to be realized.
Claims (2)
1. a sphere workpiece grinding and polishing concretion abrasive pad, it is characterized in that it is made up of sphere base layer (2) and the abrasive material (1) that is cemented on base layer (2), described abrasive material (1) is made up of polylith bulge-structure, is formed for collecting the chip pocket of polishing fluid, abrasive dust and abrasive particle between each bulge-structure; Abrasive grain density the closer to the bulge-structure surface at polishing pad summit place is less.
2. concretion abrasive pad according to claim 1, is characterized in that the thickness of described base layer is 0.2-2 millimeter, and described bulge-structure is rectangular, triangle, annular, circle or trapezoidal, and its height is between 0.5-5 millimeter.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659577A (en) * | 2013-12-05 | 2014-03-26 | 南京航空航天大学 | Consolidated abrasive cushion for grinding and polishing spherical workpiece and manufacturing method of consolidated abrasive cushion |
| CN105328560A (en) * | 2015-09-22 | 2016-02-17 | 广东长盈精密技术有限公司 | Two-sided grinding process |
-
2013
- 2013-12-05 CN CN201320790596.0U patent/CN203611119U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103659577A (en) * | 2013-12-05 | 2014-03-26 | 南京航空航天大学 | Consolidated abrasive cushion for grinding and polishing spherical workpiece and manufacturing method of consolidated abrasive cushion |
| CN105328560A (en) * | 2015-09-22 | 2016-02-17 | 广东长盈精密技术有限公司 | Two-sided grinding process |
| CN105328560B (en) * | 2015-09-22 | 2017-02-01 | 东莞长盈精密科技有限公司 | Two-sided grinding process |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20141205 |
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| EXPY | Termination of patent right or utility model |