CN1262639A - Method and apparatus for polishing ophthalmic lenses - Google Patents
Method and apparatus for polishing ophthalmic lenses Download PDFInfo
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- CN1262639A CN1262639A CN99800425.1A CN99800425A CN1262639A CN 1262639 A CN1262639 A CN 1262639A CN 99800425 A CN99800425 A CN 99800425A CN 1262639 A CN1262639 A CN 1262639A
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- polishing
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- polishing tool
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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
- 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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- 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
- B24B37/00—Lapping machines or devices; Accessories
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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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
Abstract
The invention pertains to an improved method, a lapping tool head (82) and a lens polishing apparatus for carrying out the method, for polishing ophthalmic lenses (26). The apparatus has a lapping tool head (82), a flexible membrane (134) covering a lapping portion of the tool head (82), and pump and nozzle for pumping abrasive slurry over the lapping tool head. The new method comprises the conventional step of imparting an oscillatory movement to the lapping tool head (82) and contacting the lens surface with the lapping portion of the lapping tool head while an abrasive slurry is pumped over the lapping tool head (82). The improvement comprises the additional step of periodically undulating the membrane (134) for imparting a wave in that membrane such that the abrasive slurry can flow between the membrane and the lens surface. The lapping slurry is efficiently moved over the entire surface of the lens for improving the quality of the lenses (26) polished by this process.
Description
The field of the invention
The present invention relates to the polishing of lens, but relate to the method and apparatus of the polishing tool polishing ophthalmic lenses that is used to utilize a polished film that contains dynamic compaction (DC) more particularly.
Background of the present invention
A basic demand to the equipment that is used for polishing ophthalmic lenses in the optics industry is the surface smoothness that can improve eyeglass under the situation that does not change lens surface curvature.Remove little cut and cutter trade on the eyeglass when ideally, the polishing operation of eyeglass is limited at the curvature that keeps regulation fully.Should see, any not controlled pressure spot on the polished film of polishing tool head or the polishing fluid in any position of polished film exhaust and all can make polishing operation grind off the material of eyeglass part more or less, thereby have changed the curvature of regulation and caused optical defect.
Developed the polissoir of numerous species type, they are obtaining success in varying degrees in the past.Can think that these equipment are two classes by rough segmentation.First kind utilization has the rubbing head of elasticity or flexible polishing film, when polished film will deform when contacting with lens surface with adaptive its curvature.The example of this kind equipment has illustrated in following United States Patent (USP).
U.S. Patent No. 3,589,071,1971.6.29 authorizes conspicuous Xu Hong (Hans S.Hirschorn);
U.S. Patent No. 5,205,083,1993.4.27 authorizes the handkerchief ladder to (Dennis R.Pettibone);
U.S. Patent No. 5,662,518,1997.9.2 authorizes the James people such as (Michael D.James).
The second class eyeglass polissoir of prior art utilizes a plurality of plungers to come the gradient of exerting pressure on the polishing face.Design though these equipment are the polishings at the speculum of large telescope, this kind equipment here also is significant.The example of these equipment has explanation in following United States Patent (USP):
U.S. Patent No. 4,606,151,1986.8.19 authorizes He Naxi (ErichHeynacher);
U.S. Patent No. 4,802,309,1989.2.7 authorizes He Naxi;
U.S. Patent No. 4,850,152,1989.7.25 authorizes people such as He Naxi.
Three examples in this back have been described and have been had a plurality of polissoirs that are used for applying in the polished film zones of different actuator of different pressures.How many quantity of material that different pressure need be removed according to lens surface diverse location place is regulated, so that can realize polishing operation quickly.These equipment have undeniable advantage, believe that they are major progress in the optical surface polishing technology.
But, these equipment are not considered the following fact: the polishing fluid that the polishing operation of eyeglass usually is accompanied by some location of lens surface gathers or exhausts, this will cause in these zones excessively or the shortcoming polishing.Though this fact is to cause a very general root of lens optical defect, neither one has solved the problem of the polishing fluid motion between control polished film and the lens surface in known conventional art equipment.
The present invention's general introduction
Yet but provide a kind of new method of polishing ophthalmic lenses in the present invention.A kind of polishing tool head also is provided, and it can adapt to the shape of eyeglass and the polishing fluid between tool movement head polished film and the polished lens simultaneously.
Say roughly, a feature according to the present invention provides improving one's methods of a kind of polishing ophthalmic lenses surface, the employed equipment of this method contains: a polishing tool head, flexible membrane on topped polishing part in this tool heads, and be used for the polishing liquid pump is transported to pump and spray nozzle device on the polishing tool head.This new method comprises common step, promptly applies reciprocating motion to polishing tool head, and when transporting to the polishing liquid pump on polishing tool head and the eyeglass, lens surface is partly contacted with the polishing of polishing tool head.The improvement of this method comprises an extra step, though polished film periodically undulatory motion make polishing fluid between film and lens surface, to flow in this film, to add a fluctuation.
A major advantage of this new method is that polishing fluid will move on the whole surface of eyeglass effectively, thereby improve the quality of finish of eyeglass.
Another feature of the present invention is, this new method also comprises such step, even polished film is shaped along the axle of pair of orthogonal, and make polished film along the contour shape of these two axles respectively similar in appearance to the basic curvature and the cross curvature that are aligned in polished eyeglass.This shaping of polished film guaranteed to realize polishing operation equably, and can any pressure spot or relax zone not occur on the polishing part of polished film.
According to another feature of the present invention, provide a kind of polishing tool head that is used for polishing ophthalmic lenses.This ramming head tool heads comprises a substrate and a plurality of pneumatic fittings that is installed on the substrate, and this substrate has erecting device, and it can be fixed on the eyeglass polissoir.Also be fixed with a composite plate on the substrate, some pneumatic circuits are wherein arranged, each loop is communicated with a pneumatic fittings.Be fixed with a plurality of pneumatic linear actuators on the composite plate, these pneumatic linear actuator orientations are parallel to each other, constitute a circular array, and each pneumatic linear actuator links to each other with a corresponding pneumatic circuit with closed type.There is a rigidity cover to surround the neck end that whole cylinders also encase each pneumatic linear actuator respectively at the composite plate offside.
Have a long sleeve identical to be fixed on the rigidity cover at the central area of circular array with the pneumatic linear actuator orientation, also have flexible membrane topped these pneumatic linear actuators and rigidity cover.Stretch out a pilum on this flexible membrane, it stretches into sleeve and is fixed in the sleeve.Each pneumatic linear actuator all has a telescopic end bar, movably is pressed on the flexible membrane, and the latter is shaped.
When each pneumatic fittings can be connected respectively on the corresponding air pressure source, each pneumatic linear actuator is controlled respectively, with curvature flexible membrane is shaped according to lens.When allowing flexible membrane contact with lens, the middle body of film will be used as one with reference to contact point, with pressure between the specular surface film be contacted with selected film with lens.
According to another feature of the present invention, the pneumatic linear actuator array in the polishing tool head comprises two concentric circles around sleeve, an inner circular and an outer circle.Like this, when the pneumatic linear actuator of position on two circles periodically activated respectively, flexible membrane will rise and fall in circle fluctuation mode, and polishing fluid is moved on lens surface.
According to another feature of the present invention, the pneumatic linear actuator array can be divided into 4 subarrays, the position is on the radially relative position of tool heads respectively, and the pneumatic linear actuator of each contraposition in the subarray on the relative position radially can be worked in groups, in flexible membrane, to produce radial undulation, polishing fluid is moved on lens surface.
According to another feature of the present invention, the pneumatic linear actuator array comprises two concentric circles.Each pneumatic linear actuator all has a telescopic end bar, and a D shape pad has been installed all on the expansion end bar of pneumatic linear actuator in the outer circle, the short lines of D shape pad is along the circumferential edge orientation stretching of circular array, and each D shape pad all can rotate on expansion end bar separately respectively around the axle that its orientation is also aimed at the circumferential edge direction of this circular array.
The top cap of suction cup shape is installed on the expansion end bar of each pneumatic linear actuator in the inner circular.Suction cup can randomly be connected on the vacuum source as the inner circular pneumatic linear actuator.Therefore, the pneumatic linear actuator in outer circle is connected a pressure source, and pneumatic linear actuator in the inner circular and soup stick be when being connected on the vacuum source, and this pneumatic linear actuator array just can be used for according to extreme eyeglass curvature this flexible membrane that is shaped.
Of the present invention also have a feature to be, the pneumatic linear actuator array is the layout of a compactness, and its area is substantially similar to the area of common spectacles sheet blank.When being used to reequip an existing eyeglass polissoir, the pneumatic linear actuator array can be installed in one have common size and be applicable to that common eyeglass grinds and the tool heads of polissoir on, thereby make this polishing tool head can obtain at an easy rate for the optics industry.
The simple declaration of accompanying drawing
Description of drawings one embodiment of the present of invention.Similarly similar elements represented in code name in each accompanying drawing.In the accompanying drawings:
Fig. 1 is the simplicity of illustration of eyeglass polissoir in accordance with a preferred embodiment of the present invention.More clearly in order to express, other common devices of the common drive motors of this equipment, control device, housing and this kind equipment do not draw among the figure;
Fig. 2 is mounted in a side view of supporting the lens on the piece;
Fig. 3 is the close shot figure that is contained in the polishing tool head in the eyeglass polissoir;
Fig. 4 is the part perspective view of the inner polishing station of eyeglass polissoir;
Fig. 5 is the part side elevation view of eyeglass polishing station;
Fig. 6 is the enlarged perspective of the polishing tool head of eyeglass polishing station, and topped film is wherein partly excised;
Fig. 7 illustrates the polishing tool head of not being with topped film;
Fig. 8 illustrates the plane of the polishing tool head of not being with topped film;
Fig. 9 is the polishing tool head sectional view along the 9-9 line of Fig. 8;
Figure 10 is arranged on the plane of the composite plate in the polishing tool head substrate;
Figure 11 is the pneumatic circuit figure that is used in combination with polishing tool head;
Figure 12 is a schematic diagram of representing the ideal movements path of polishing tool head on lens;
Figure 13 is the schematic plan view of polishing tool head, its explanation each different pressure area band when wherein each kind of pressure area band can be by radially relative sector operation;
Figure 14 is the schematic plan view of polishing tool head, its explanation each different pressure area band when wherein each kind of pressure area band can be operated by each concentric circles.
DETAILED DESCRIPTION OF THE PREFERRED
Though the present invention can have many multi-form embodiment, but shown in the drawings here and will describe in detail just according to certain embodiments of equipment of the present invention and a kind of method of this equipment of use, should be appreciated that simultaneously, the disclosure only is an example of the principle of the invention, and does not wish the present invention is confined on the embodiment of shown and explanation.
At first referring to Fig. 1,2,3, they illustrate a kind of simplified perspective view of equipment of new method that is used for realizing polishing ophthalmic lenses in accordance with a preferred embodiment of the present invention respectively; One typically is installed in a lens of supporting on the piece; With a polishing tool head that is arranged in this equipment.But understand, before this equipment of detailed description in detail, need to point out some general information for Fig. 1 being had more clearly.Here said lens polishing is an optional step of making on hyperfine eyeglass production equipment in the lens process, and wherein the final curvature of lens surface should be determined by process, and should not change during polishing operation.The polishing of lens is a kind of slight grinding operation, has the eyeglass of meticulous quality in order to produce, and can randomly carry out this operation and remove the invisible or manufacturing deficiency that is difficult to see on the lens surface.The polishing operation of eyeglass was randomly carrying out before eyeglass applies transparent resin matter coating at last.
According to the above as can be seen, in order to obtain expected effect, in this polishing operation process, importantly should come to remove some materials with accurate and controllable mode from lens surface.This is according to the equipment of this preferred embodiment and the main purpose of method basically.
Comprise the combination of following each component according to the equipment of this preferred embodiment: a cleaning station 20; A polishing station 22; And mechanical hand 24, the latter is used for an eyeglass being installed to one on it and supports the lens 26 of piece 28 to place the station (not shown) from one to be sent to cleaning station 20, be sent to polishing station 22 from cleaning station 20, transfer back to cleaning station from polishing station 22 again, and then get back to and place the station (not shown), the operator of place can take off eyeglass 26 from equipment at the placement station.Should see, place the station (not shown) and can be arranged in the cleaning station, and can support that piece 28 be placed in the cleaning station 20 to eyeglass 26 and eyeglass by equipment operator during beginning.
Get back to Fig. 1, cleaning station 20 comprises one first vacuum chuck 60 (with among Fig. 3 80 similar), is used for maintaining eyeglass and supports piece 28.First vacuum chuck 60 is installed in the rotating shaft of a rotary actuator 62, makes that eyeglass 26 is rotated in matting.Also be provided with one and be installed in one first service sink 64 on the structural member 66, it is driven by a trilinear actuator and sliding assembly 68 and does the motion of above-below direction with respect to rotary actuator 62.First vacuum chuck 60 has the splash-back that can remove stage makeup and costume 70, and a nozzle 72 then has been installed in service sink 64.In matting, service sink 64 rises towards splash-back 70, has encased eyeglass 26, eyeglass support piece 28 and nozzle 72 at last fully.Water or water and detergent mixture spray facing to eyeglass in the process of several circles of eyeglass 26 rotations then.Finished after the matting, eyeglass 26 is sent to polishing station 22 by mechanical hand 24.
Polishing station contains one second vacuum chuck 80, is used for maintaining in polishing process eyeglass 26.Second vacuum chuck 80 is installed in polishing tool head 82 tops, makes that the surface of polished eyeglass 26 is downward, facing to the top of polishing tool head 82.
Continuously the polishing liquid pump is transported on polishing tool head 82 and the eyeglass 26 with the one or more polishing fluid nozzles 104 among Fig. 3.
Utilize and for example authorize the U.S. Patent No. 5,175 that bohr pauses (John R.Bolton) on January 5th, 1993, the mechanism of the sort of type described in 961 makes the polishing tool head 82 of equipment work in the reciprocating mode of circumference.The power of rotation sends this mechanism to by belt pulley 106.
Specifically, wherein show vacuum chuck 80 and polishing tool head 82 with the yardstick that amplifies referring to Fig. 3.Only partly show second vacuum chuck 80 among the figure.The reason of the part of only drawing also is in order to keep the succinct of figure.But should be understood that this chuck 80 is the same with first chuck 60, all is to rely on vacuum work, and they all are connected on a vacuum source and the suitable by-pass valve control by a conduit shown in code name 110.
In the equipment according to this preferred embodiment, shown in the preferred mounting means of Figure 4 and 5, vacuum chuck 80 is installed on the gimbal 112, and the latter is installed on the vertical frame 114 that is connected in the 6th linear actuator 88.
Gimbal 112 comprises one the one C shape element 116, and the latter can rotate along first nodal axisn 118 by a clutch shaft bearing (not shown) in the vertical frame 114 around its center.The two ends of one the 2nd C shape element 120 are connected with the two ends of a C shape element 116 respectively along second nodal axisn 122 perpendicular to first nodal axisn 118.
As shown in Figure 5, the 2nd C shape element 120 has a flat surfaces 124 in the top.For when supporting a piece 28 to be inserted in the chuck 80 or supporting a piece 28 when chuck 80 takes off, can make gimbal 112 directed and stable, can advantageously allow this flat surfaces selectively with 126 contacts of a stable element of facing mutually.In this preferred equipment, stable element 126 is the planar end surface circular elements on the expansion link that is installed in a linear actuator 128.
Get back to Fig. 3, polishing tool head 82 the most handy fabric caps 130 are topped, encase live part wherein fully.Fabric cap 130 usefulness position is around an elastic webbing 132 below the enlarged on the tool heads is fixed on tool heads.The textile material of fabric cap 130 should be selected to such an extent that can and maintain good tolerability and good characteristic to the absorption of polishing fluid.The preferred fabric type that is used to make fabric cap 130 is DuPont
TM(Du Pont) company is with trade name Wearforce
TMThe fabric that " F " sells.DuPont
TMCompany, promptly E.I.du Pont de Nemours andCompany has office all over the world, and its general headquarters address is: 1007 Market Street, Wilmington, DE, 19898, U.S.A.
Should see, in the course of work of preferred embodiment equipment, when eyeglass 26 be maintained at polishing tool head 82 contacted positions on and during along the peripheral pump of eyeglass fortune polishing fluid, then for example compare with the neighboring area of eyeglass 26, the polishing fluid circulation of its middle section may micropodia.
As everyone knows, the solid phase part that polishing fluid contains liquid phase part (being generally water) and is made up of the microcosmic abrasive grains, these particles are alumina particle normally, and its size typically is not more than 5 microns.The effect of liquid phase part is abrasive grains to be carried on the whole polished area and to wash plastics or the glass particle that grinds from eyeglass.But should see that polishing fluid can not be evenly distributed on the whole surface of eyeglass when eyeglass contacts with polishing tool head fully.This drawback can cause the uneven wear of the fabric cap 130 of topped polishing tool head 82.Polishing fluid also can cause the inhomogeneous polishing of eyeglass in the whole lip-deep uneven distribution of eyeglass.
In order to prevent these polishing defects, polishing tool head 82 in the preferred embodiment contains bending film 134 and a many pneumatic linear actuator 136 that is installed in below the bending film shown in Fig. 3 and 6, the latter is used for making the film shaping and absorbing fabric cap 130, film 134 according to the curvature of eyeglass 26, and the uniform pressure distribution of maintenance between the whole surface of eyeglass 26, film 134 the most handy impermeable flexible rubber materials are made, and damage mechanism and the device relevant with pneumatic linear actuator 136 to prevent polishing fluid.
Also carry out to make the periodically additional function of undulatory motion of film 134 according to the pneumatic linear actuator 136 of the polishing tool head 82 of this preferred embodiment, polishing fluid is moved between film and eyeglass 26.
Simultaneously referring to Fig. 6-11, the polishing tool head 82 of this preferred embodiment equipment has been described in more detail wherein now.Polishing tool head 82 contains 18 pneumatic linear actuators 136, and they are arranged to a circle or hexagonal array around a central sleeve 138.The diameter of circle or hexagonal array preferably is slightly less than the diameter of standard lens blank.The array of pneumatic linear actuator 136 is made up of two concentric circles, and 12 outside plungers 140 are arranged on the outer circle, and 6 internal piston 142 are arranged on the inner circular.
In a kind of tool heads 82 of form, each pneumatic linear actuator 136 all is an one action, spring returns and neck portion mount type, and its haul distance is selected to such an extent that make it can be operated in the middle section of stroke in whole adjustable ranges of polishing tool head.In this regard, the curvature of the film 134 of the polishing tool head of this preferred embodiment equipment preferably can be adjusted to planar shaped and is adjusted to and is about 16 dioptric convexs from being about-6 dioptric slight spills.
All there is a D shape pad end of each outside plunger 140, and the short lines section of D shape pad has defined one section circular arc on the circular array periphery.Each D shape pad 144 can pass the plunger rod end and rotates with respect to the plunger rod end along little axle 146 (see figure 9)s of above-mentioned short lines section orientation around one.This structure of pad 144 helps the work of film 134 on its whole workspace.Particularly along the work of neighboring area, workspace.
The boom end of internal piston 142 is preferably with the end cap 148 of vacuum cup type.The shape of these end caps 148 helps providing when the pneumatic linear actuator 136 of these plungers is outwards driven the uniform pressure below the film to distribute.The shape of these suction cup type end caps 148 also helps and can randomly apply vacuum to it, thereby for example when being configured as a plane to film, need can apply a corresponding pulling force to film, perhaps as will be described later, can make the polishing fluid motion of film generation undulatory motion to allow below it.
For above-mentioned latter event, those pneumatic linear actuators 136 of operation internal piston 142 preferably have a hollow stem that is connected with a vacuum source interface, and the type of pneumatic linear actuator is that the one action spring is tension type.Should see that also the inside slide bar 142 that suction cup shape cap 148 has been installed also can be connected on the vacuum source, its 136 of corresponding pneumatic linear actuator is connected on the air pressure source simultaneously.Under this layout, each cylinder all has a vacuum interface and a pressure interface.Vacuum interface is connected on the hollow plunger, and pressure interface is connected on the piston of bar outside.But this layout is not illustrated as yet and is that to be familiar with the people of pneumatic system known, but will become obvious to them by this layout of explanation of this specification.
Central authorities' sleeve 138 is fixed with respect to inside and outside plunger the 140, the 142nd.Its longitudinal axis abreast in alignment with each pneumatic linear actuator 136 the axle.Sleeve 138 has defined a neutral axis of tool heads 82.The inside dimension of central authorities' sleeve 138 is suitable for the pilum 150 that holds and keep any to stretch out from the middle section of film 134 inboards.Pilum 150 is securely held in the sleeve 138, makes it to provide a reference point for film is shaped.The most handy elastic rubber material the same with making film 134 of pilum 150 made, and is combined into or is molded as an integral body with film 134.The part of the close pilum 150 of film is placed and nestles up eyeglass, provides one preferably to remain and the contacted fixed base point of lens surface thus, can be formed to such an extent that be matched with the curvature of polished eyeglass from this basic point film 134.When using a device for pressure measurement to control the motion of the 6th linear actuator 88, the part of the close pilum 150 of film also provides a reference point for the motion of polishing tool head 82 on polished eyeglass.In this regard, the 6th linear actuator 88 preferably includes one and can regulate the pneumatic linear actuator (not shown) that high-precision pressure adjuster (not shown) is connected with one.This pneumatic means makes the operator of eyeglass polissoir can accurately set a basic pressure between polishing tool head 82 and polished lens surface with combining of pilum 150.
Referring now to Fig. 7,9,10,, the interface end 152 of each pneumatic linear actuator 136 all is seated on the composite plate 154, and is sealed in separately in the respective chamber on the composite plate.Composite plate 154 and each pneumatic linear actuator 136 are surrounded by a rigidity cover 155.The rigidity cover has also encased the position of each pneumatic linear actuator at the neck end of composite plate 154 offsides, with keep these cylinders 136 spatially separately and orientation parallel to each other.Sleeve 138 also is fixed on the rigidity cover 155 and along the direction that is parallel to cylinder 136 and is orientated.One or several notch 158 is arranged on the outer surface of rigidity cover 155, be used for cooperating, so that film 134 is guided and is fixed on the cover with position one or several similar muscle rib (not shown) in film 134 inboards.
6 loop troughs 156 are arranged in the composite plate 154, and they are connected to a people or several pneumatic linear actuator 136 on the hole in 6 holes 158, this hole again with 6 pneumatic fittings 160 that a substrate 162 from tool heads 82 stretches out one be connected.Substrate 162 can be installed on the axle of reciprocally swinging mechanism with the bolt that passes countersunk as shown in the figure.6 loop troughs 156 couple together 2 or several pneumatic linear actuator 136, add that central basic bar 150 forms 7 pressure area bands on the polishing tool head 82 altogether.Each pressure area band uses letter " A " to arrive " G " mark respectively, shown in Fig. 8,13,14.
Each pneumatic fittings 160 all links to each other with the pneumatic operated valve 164 of an Electromagnetically-operating, and the latter is connected again on the air voltage supply part 166.Voltage supply interface at air voltage supply part 166 is provided with a precision ratio pressure regulator 168.The pressurization of each pneumatic linear actuator 136 realizes by operating a magnetic valve 164 simultaneously, and all will change the pressure setting of pressure regulator 168 at every turn.Pressure regulator 168 belongs to computer-controlled rapid response type, and in fact closing and pressurizeing all and to finish in the very short time of all 6 circuits finished within several seconds.Pressure in whole work period of polishing head in each pneumatic linear actuator 136 preferably will be regulated repeatedly.When under vacuum state, using internal piston 142, also to control in the cup-shaped cap 148 in these plungers, plunger with a similar loop (not shown), perhaps 142,148 vacuums among both are set.
Get back to Figure 10, wherein be illustrated in the composite plate 154 and also have one the 7th loop trough 170 and a seven apertures in the human head 172.This loop trough also is connected pneumatic fittings 160, on air voltage supply part 166 and the adjuster 168.As shown in Figure 9, loop trough 170 is connected on the guide hole 174 by the middle section of tool heads 82.Film 134 for example is preferably in, and 176 places of the groove shown in Fig. 6 and 9 are sealed in around the rigidity cover 155.When allowing air pressure by guide hole 174, this pressure will be sent to the inner and film 134 of tool heads below, make the film bulging.Make the inside of film have slight normal pressure will help reducing the concentrated area of local pressure at each plunger 140 or 142 places every now and then.Similarly, as can be seen,, apply vacuum also can for loop trough 170 for example in order to obtain the extreme curvature of film 134.
Referring now to Figure 12,, the track of the middle section of tool heads 82 in polishing eyeglass process of three district's bands " A " representative among this figure.District's band " A " though only drawn among the figure, this figure wishes to illustrate entire tool 82 a lip-deep motion conditions at eyeglass 26.Reciprocating diameter and speed preferably all are adjustable.For polishing the eyeglass that a diameter is about 75mm, between the 20mm, preferred speed forwards between 600 commentaries on classics about per minute 300 about 10mm in the gratifying diameter setting of this preferred embodiment equipment.
In order to understand the work of polishing tool head 82 better, see also Figure 13 now.This illustrates is the plane of polishing tool head 82 and by pilum 150 and slide bar 140,142 defined 7 zones.These regional layouts make and can be combined into 4 sectors shown in the figure to one or several district's band in them.Sector 180 and symmetry relative with 182.Sector 184 and 186 also is relative and symmetrical, and with sector 180,182 relations of meeting at right angles.
Sector 180 and 182 for example on the tool heads axle 188 of the horizontal curve of polished eyeglass be provided with, claim this axle to be the horizontal curve axle here.Similarly, sector 184 and 186 is provided with along fundamental curve axle 190.Can see that all district's bands that are positioned at horizontal curve axle 188 1 sides all are provided with symmetrical manner all district's bands with respect to the axle opposite side.Similarly, the district's band that is positioned at fundamental curve axle 190 1 sides all is provided with symmetrically with respect to district's band of opposite side.Therefore, the district band of each on the polishing tool head all has corresponding district band four tunnel (four-way) symmetry with it with respect to two normal axis 188 and 190 of tool heads.Can find out the advantage of this layout of each pressure area band on the polishing tool head 82 more significantly by following explanation.
Setting by sector 180 and 182 each the pressure area band that defines can be according to the horizontal curve shape adjustment of polished eyeglass regulation.Similarly, being set by the pressure in each zone of sector 184 and 186 definition can be according to the fundamental curve shape adjustment of eyeglass regulation.Verified, can producing barometric gradients along the two pairs of relative sectors, for two basic curvature according to eyeglass 26 profile of film 134 on two vertical direction of tool heads 82 to be shaped be useful, thereby be useful for the uniform polish that obtains lens surface.
Figure 14 illustrates another key property of this preferred embodiment polishing tool head 82, and this characteristic is also directly relevant with the symmetric configuration of each pressure area band on the tool heads.As mentioned above, 18 of tool heads 82 pneumatic linear actuators 136 are divided into the sector 180,182,184,186 of band to form 4 symmetries, 7 districts.These 7 district's bands have also formed 3 concentric circles or 3 concentric hexagons.But succinct for explanatory note will illustrate by 3 concentric circles.First circle 192 comprises having the fixedly single district band " A " of pilum 150.Second circle 194 comprises two district's bands " B " and " E ", and they contain 4 and 2 pneumatic linear actuators 136 respectively.The 3rd circle 196 comprises 4 districts band " C ", " D ", " F ", " G ", and they contain 2,4,4,2 pneumatic linear actuators respectively.Each pneumatic linear actuator 136 among district band " B " and " G " all with same district band in the relative radially symmetrically layout of another pneumatic linear actuator.
The pressure of all pneumatic linear actuators in the circle 194 and 196, perhaps justify the vacuum of setting in the plunger 142 in 194, can periodically be reduced or increased, fluctuateed up and down with respect to the surface of eyeglass 26 thereby film 134 is out of shape on these control position points from separately regulation setting value.Circular array 194 and 196 can be worked dividually in succession, pumps into the polishing fluid of nominal amount or polishing fluid is shifted onto the neighboring area from the middle section of eyeglass with the center to eyeglass 26.It is useful that the controlled fluctuation of film 134 and the motion of consequent pump are done for keep the constant supply of polishing fluid on the whole surface of eyeglass.
Because each district's band in each circle is a radial symmetric with respect to the layout of polishing tool head, again because each district band all can be driven an official hour, thus film take place fluctuation during the polishing action of tool heads with controlled the uniform polish that can keep on the whole lens surface.
Should see that when the curvature of film approached maximum, the certain user may preferably adopt and allow film fluctuate with the form of the circular ripple of pulsing to carry out pump fortune.Yet, when eyeglass curvature when smooth, the barometric gradient in the two pairs of sectors 180,182 and 184,186 can alternately change, to produce the pulsation radial wave in film 134, make film 134 to push away the form fluctuation of sweeping, polishing fluid is swept and spreads on the whole lens surface.
No matter have been found that film with circular wave mode or the fluctuation of radial wave pattern cycle ground, polishing efficiency all has tangible increase.Should see, on the authorized pressure that the fluctuation of the pulsating of film preferably is superimposed upon each cylinder is set.Therefore, the regulation curvature of film 134 before each fluctuation forms and afterwards and all remain constant at the node place of each fluctuation.
Though people know panting action as described herein and can greatly improve the eyeglass polishing operation, but the people that are familiar with the eyeglass polishing should will appreciate that panting action as described herein differs and exempts following necessity surely fully: promptly periodically eyeglass is lifted away from polishing tool head to upgrade the polishing liquid layer between them.
About using and operate meticulousr mode of operation according to this preferred embodiment equipment, should be still fairly obviously according to top explanation, so we think about using and the further discussion of mode of operation is unnecessary, no longer provide here.
Though have been illustrated in the accompanying drawings and illustrated one embodiment of the present of invention above, but those skilled in the art that should see, can make various modifications, structural change and adopt embodiment of equal value under the situation that does not depart from true spirit of the present invention and category.Therefore, above-mentioned explanation and legend should not be understood that it is restriction to by the defined category of the present invention of appended claims.
Claims (20)
1, the method on a kind of improved polishing ophthalmic lenses surface, the equipment that this method is used contain a polishing tool head, one topped on the polishing part of above-mentioned tool heads flexible membrane and be used for the polishing liquid pump is transported to pump and spray nozzle device on the above-mentioned rubbing head; Said method comprises following common step:
Apply reciprocating motion for above-mentioned polishing tool head, and when the polishing liquid pump being transported on above-mentioned polishing tool head and the above-mentioned eyeglass, above-mentioned lens surface is partly contacted with the above-mentioned polishing of above-mentioned polishing tool head; And improvement wherein comprises following additional step:
Make above-mentioned film periodically undulatory motion make polishing fluid between above-mentioned film and above-mentioned lens surface, to flow in this film, to add a fluctuation.
2, according to the process of claim 1 wherein that above-mentioned tool heads is circular, and above-mentioned make above-mentioned film periodically undulatory motion be included in the step that adds radial undulation in the above-mentioned film with the step that in this film, adds a fluctuation.
3, according to the process of claim 1 wherein that above-mentioned tool heads is circular, and above-mentioned make above-mentioned film periodically undulatory motion be included in the step that adds circular fluctuation in the above-mentioned film with the step that in this film, adds a fluctuation.
4, according to the process of claim 1 wherein that above-mentioned polishing tool head has a neutral axis, and said method also comprises and makes above-mentioned lens surface with respect to before and after the above-mentioned neutral axis and the step of side-to-side movement.
5, basis the process of claim 1 wherein that above-mentioned polishing tool head has a neutral axis, and said method is further comprising the steps of: above-mentioned film is shaped along a pair of normal axis perpendicular to above-mentioned neutral axis; And make above-mentioned film be formed respectively similar in appearance to the basic curvature and the cross curvature of above-mentioned eyeglass along the curvature of the profile of above-mentioned pairwise orthogonal axle.
6, according to the method for claim 5, wherein above-mentioned film profile is before every kind of above-mentioned fluctuation forms and all remain unchanged afterwards and at the node place of every kind of above-mentioned fluctuation.
7, according to the method for claim 5, the wherein above-mentioned step that above-mentioned film is shaped comprises with respect to above-mentioned polishing tool head and pushes away, pulls on the step of stating film simultaneously.
8, according to the method for claim 5, the wherein above-mentioned step that above-mentioned film is shaped comprises the step that makes the slight bulging of above-mentioned film.
9, according to the method for claim 5, the wherein above-mentioned contacted step of a part and above-mentioned lens surface that periodically makes above-mentioned film undulatory motion comprise the above-mentioned film of lasting maintenance with the step that in above-mentioned film, adds a fluctuation.
10, a kind of polishing tool head that is used for polishing ophthalmic lenses, it comprises:
A substrate, it contains and is used for and will himself be fixed on an erecting device and an a plurality of pneumatic fittings mounted thereto on the eyeglass polissoir;
A composite plate that is fixed on the aforesaid substrate wherein contains some pneumatic circuits, and each above-mentioned pneumatic circuit is connected with a pneumatic fittings in above-mentioned a plurality of pneumatic fittings;
A plurality of pneumatic linear actuators that are fixed on the above-mentioned composite plate, they have defined the pneumatic linear actuator circular array of a parallel orientation, and each above-mentioned pneumatic linear actuator all is connected with a corresponding circuit in the above-mentioned pneumatic circuit with closed type;
An outer cover, it has surrounded all above-mentioned pneumatic linear actuators, and individually encase each above-mentioned pneumatic linear actuator that end back to above-mentioned composite plate;
Position is at the microscler sleeve on above-mentioned outer cover of fixedly securing of above-mentioned circular array middle section, and the latter's orientation is parallel with the orientation of above-mentioned each pneumatic linear actuator;
The flexible membrane of topped above-mentioned each pneumatic linear actuator and above-mentioned outer cover, above-mentioned film have one to extend in the above-mentioned sleeve on it and be fixed on pilum in the above-mentioned sleeve; And
Above-mentioned each pneumatic linear actuator all has a telescopic end bar separately, is pressed on the above-mentioned flexible membrane in movable mode, and above-mentioned flexible membrane is shaped;
Thereby make when above-mentioned pneumatic fittings can be respectively when separately air pressure source is connected, above-mentioned each pneumatic linear actuator can be controlled respectively so that above-mentioned film can be shaped according to the curvature of lens, and when allowing above-mentioned film contact with lens, the middle body of above-mentioned film just can be used as one with reference to contact point, makes above-mentioned film press to above-mentioned lens with the selected pressure between above-mentioned film and the above-mentioned lens.
11, according to the polishing tool head of claim 10, wherein above-mentioned pneumatic linear actuator array comprises an internal concentric and the external concentric circle around above-mentioned sleeve.
12, according to the polishing tool head of claim 10, above-mentioned each pneumatic circuit in the wherein above-mentioned composite plate comprises a loop that is communicated to the inside of above-mentioned film, is used for making above-mentioned film bulging.
13, according to the polishing tool head of claim 10, wherein above-mentioned array can be divided into two pairs of relative subarrays, and above-mentioned pneumatic circuit can be connected on each above-mentioned pneumatic linear actuator in above-mentioned every pair of subarray jointly.
14, according to the polishing tool head of claim 13, wherein above-mentioned pneumatic circuit also can be connected to jointly above-mentioned each the circle in each above-mentioned pneumatic linear actuator on.
15, according to the polishing tool head of claim 10, wherein on the above-mentioned expansion end bar on each the above-mentioned pneumatic linear actuator in the said external circle D shape pad is installed all, the short lines section of above-mentioned D shape pad is extended along the circumference of above-mentioned circular array, and above-mentioned D shape pad can rotate along an axle from the above-mentioned hoop orientation of above-mentioned circular array on above-mentioned expansion end bar.
16, according to the polishing tool head of claim 15, wherein on the above-mentioned expansion end bar in the above-mentioned pneumatic linear actuator in above-mentioned inner circular suction cup shape top cap is installed.
17, a kind of equipment that is used for polishing ophthalmic lenses, it comprises:
An eyeglass polishing station, it contains: a polishing tool head; Be used for applying reciprocating device to above-mentioned rubbing head; Be used for when above-mentioned reciprocating motion, keeping lens and the contacted device of above-mentioned polishing tool; And be used for the device of polishing liquid pump on the above-mentioned polishing tool head;
Above-mentioned polishing tool head has a flexible membrane mounted thereto and is used to make the periodically device that is installed in above-mentioned film below of undulatory motion of above-mentioned film;
Thereby make when above-mentioned polishing tool head can move back and forth on the lens surface, when polishing fluid can be transported on the above-mentioned film by pump, and when above-mentioned film periodically during undulatory motion, above-mentioned polishing fluid can move between above-mentioned film and above-mentioned surface, to polish above-mentioned surface effectively.
18,, wherein above-mentionedly be used for making the device of above-mentioned film undulatory motion to comprise the device that is used for forming radial undulation at above-mentioned film according to the polissoir of claim 17.
19,, wherein above-mentionedly be used for making the device of above-mentioned film undulatory motion to comprise the device that is used for forming circular fluctuation at above-mentioned film according to the polissoir of claim 17.
20, according to the polissoir of claim 17, the wherein above-mentioned device that is used to make above-mentioned film undulatory motion comprises and is used to device that above-mentioned film is shaped along a pair of vertical axle.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2228323 | 1998-01-30 | ||
| CA2,228,323 | 1998-01-30 | ||
| CA2,260,484 | 1999-01-27 | ||
| CA002260484A CA2260484C (en) | 1998-01-30 | 1999-01-27 | Method and apparatus for polishing ophthalmic lenses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1262639A true CN1262639A (en) | 2000-08-09 |
Family
ID=25680009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99800425.1A Pending CN1262639A (en) | 1998-01-30 | 1999-01-28 | Method and apparatus for polishing ophthalmic lenses |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0971810B1 (en) |
| JP (1) | JP2001518022A (en) |
| KR (1) | KR20010005800A (en) |
| CN (1) | CN1262639A (en) |
| AT (1) | ATE210000T1 (en) |
| AU (1) | AU2147099A (en) |
| CA (1) | CA2260484C (en) |
| DE (1) | DE69900529T2 (en) |
| ES (1) | ES2171323T3 (en) |
| PT (1) | PT971810E (en) |
| WO (1) | WO1999038650A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351300B (en) * | 2005-12-30 | 2012-05-23 | 埃西勒国际通用光学公司 | Polishing machine for optical components |
| CN102794689A (en) * | 2012-07-30 | 2012-11-28 | 中国人民解放军国防科学技术大学 | Electromagnetic drive type active stress disc |
| CN108857841A (en) * | 2018-07-25 | 2018-11-23 | 浙江工业大学 | A kind of the photochemistry processing platform and its processing method of adjustable light source |
| CN108890509A (en) * | 2018-07-25 | 2018-11-27 | 浙江工业大学 | Photocatalysis cobalt-base alloys processing platform and processing method |
| CN110900314A (en) * | 2018-09-17 | 2020-03-24 | 斯凯孚公司 | Method for treating the surface of a metal object |
| CN112676925A (en) * | 2020-12-29 | 2021-04-20 | 襄阳华中科技大学先进制造工程研究院 | Method, device and equipment for grinding and polishing blade of aero-engine and storage medium |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE502005000312D1 (en) * | 2004-10-29 | 2007-02-22 | Schneider Gmbh & Co Kg | Polishing tool with several pressure zones |
| DE102007060467A1 (en) * | 2007-12-14 | 2009-06-18 | Carl Zeiss Vision Gmbh | Optical eyeglass lens cleaning device for use in e.g. polishing station, has driving device for rotary drive of lens and spraying nozzle for spraying aerosol on optical lens, where nozzle has valve for supplying water |
| DE102010035526A1 (en) | 2010-08-25 | 2012-03-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Finishing membrane and tool |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5205083A (en) * | 1991-10-24 | 1993-04-27 | Pettibone Dennis R | Method and apparatus for polishing optical lenses |
| US5662518A (en) * | 1996-05-03 | 1997-09-02 | Coburn Optical Industries, Inc. | Pneumatically assisted unidirectional conformal tool |
-
1999
- 1999-01-27 CA CA002260484A patent/CA2260484C/en not_active Expired - Fee Related
- 1999-01-28 AT AT99901554T patent/ATE210000T1/en not_active IP Right Cessation
- 1999-01-28 PT PT99901554T patent/PT971810E/en unknown
- 1999-01-28 KR KR1019997008873A patent/KR20010005800A/en not_active Application Discontinuation
- 1999-01-28 ES ES99901554T patent/ES2171323T3/en not_active Expired - Lifetime
- 1999-01-28 CN CN99800425.1A patent/CN1262639A/en active Pending
- 1999-01-28 WO PCT/CA1999/000066 patent/WO1999038650A1/en not_active Application Discontinuation
- 1999-01-28 DE DE69900529T patent/DE69900529T2/en not_active Expired - Fee Related
- 1999-01-28 EP EP99901554A patent/EP0971810B1/en not_active Expired - Lifetime
- 1999-01-28 JP JP53874399A patent/JP2001518022A/en active Pending
- 1999-01-28 AU AU21470/99A patent/AU2147099A/en not_active Abandoned
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351300B (en) * | 2005-12-30 | 2012-05-23 | 埃西勒国际通用光学公司 | Polishing machine for optical components |
| CN102794689A (en) * | 2012-07-30 | 2012-11-28 | 中国人民解放军国防科学技术大学 | Electromagnetic drive type active stress disc |
| CN102794689B (en) * | 2012-07-30 | 2014-09-17 | 中国人民解放军国防科学技术大学 | Electromagnetic drive type active stress disc |
| CN108857841A (en) * | 2018-07-25 | 2018-11-23 | 浙江工业大学 | A kind of the photochemistry processing platform and its processing method of adjustable light source |
| CN108890509A (en) * | 2018-07-25 | 2018-11-27 | 浙江工业大学 | Photocatalysis cobalt-base alloys processing platform and processing method |
| CN108857841B (en) * | 2018-07-25 | 2023-09-29 | 浙江工业大学 | Photochemical processing platform capable of adjusting light source and processing method thereof |
| CN110900314A (en) * | 2018-09-17 | 2020-03-24 | 斯凯孚公司 | Method for treating the surface of a metal object |
| CN112676925A (en) * | 2020-12-29 | 2021-04-20 | 襄阳华中科技大学先进制造工程研究院 | Method, device and equipment for grinding and polishing blade of aero-engine and storage medium |
| CN112676925B (en) * | 2020-12-29 | 2022-11-11 | 襄阳华中科技大学先进制造工程研究院 | Method, device and equipment for grinding and polishing blade of aero-engine and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69900529T2 (en) | 2002-08-01 |
| EP0971810B1 (en) | 2001-12-05 |
| CA2260484C (en) | 2003-04-15 |
| DE69900529D1 (en) | 2002-01-17 |
| WO1999038650A1 (en) | 1999-08-05 |
| PT971810E (en) | 2002-05-31 |
| CA2260484A1 (en) | 1999-07-30 |
| EP0971810A1 (en) | 2000-01-19 |
| ES2171323T3 (en) | 2002-09-01 |
| JP2001518022A (en) | 2001-10-09 |
| AU2147099A (en) | 1999-08-16 |
| KR20010005800A (en) | 2001-01-15 |
| ATE210000T1 (en) | 2001-12-15 |
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