EP2337652A1 - Outil de surfaçage à qualité optique - Google Patents
Outil de surfaçage à qualité optiqueInfo
- Publication number
- EP2337652A1 EP2337652A1 EP09741349A EP09741349A EP2337652A1 EP 2337652 A1 EP2337652 A1 EP 2337652A1 EP 09741349 A EP09741349 A EP 09741349A EP 09741349 A EP09741349 A EP 09741349A EP 2337652 A1 EP2337652 A1 EP 2337652A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- end surface
- interface
- rigid support
- tool according
- transverse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
- B24D9/08—Circular back-plates for carrying flexible material
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
- B24D13/147—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material
Definitions
- the invention relates to optical quality surfacing for surfaces such as a face of an ophthalmic lens or a camera lens or an instrument for observing distant objects or a face a semiconductor substrate.
- Surfacing means any operation to modify the state of a previously shaped surface. These include polishing, grinding or etching operations to modify (decrease or increase) the roughness of the surface and / or to reduce the undulation.
- a tool for surfacing an optical surface comprising: a rigid support having a transverse end surface; an elastically compressible interface secured to the rigid support, comprising a so-called central portion which is in line with said end surface of the rigid support and a so-called peripheral portion which is transversely beyond said end surface of the rigid support, having a first end transverse surface, a second end transverse surface and a lateral surface extending from the periphery of the first end surface to the periphery of the second end surface, said first end surface being applied against and covering said end surface of the rigid support; and a flexible pad adapted to be applied against a surface to be worked, subjected to the interface opposite to the rigid support, comprising a so-called central portion which lies in line
- the tool In order to reduce the roughness of the optical surface, the tool is brought into contact with the latter while maintaining sufficient tool pressure on it so that, by deformation of the interface, the pad conforms to the shape of the optical surface. .
- the optical surface While watering the optical surface with a fluid, it is rotated relative to the tool (or reciprocally) and is scanned by means of the latter. Generally, the optical surface is rotated, its friction against the tool being sufficient to jointly drive it in rotation.
- the surfacing operation requires an abrasive that can be contained in the buffer or in the fluid.
- the elastically compressible interface compensates for the difference in curvature between the end surface of the tool support and the optical surface.
- This tool provides an improvement in surface appearance, but under certain circumstances, such appearance defects still exist.
- the invention aims to provide a surfacing tool particularly effective in minimizing appearance defects, particularly but not exclusively for concave working surfaces. It proposes for this purpose an optical quality surfacing tool, comprising: a rigid support having a transverse end surface; an elastically compressible interface subject to the rigid support, having a so-called central portion which is in line with said end surface of the rigid support and a so-called peripheral portion which is transversely beyond said end surface of the rigid support, having a first transverse end surface, a second end transverse surface and a lateral surface extending from the periphery of the first end surface to the periphery of the second end surface, said first end surface being applied against and covering said surface of end of the rigid support; and a flexible pad adapted to be applied against a surface to be worked, secured to the interface opposite the rigid support, comprising a so-called central portion which is located at the right of said end surface of the rigid support and a so-called device which is transversely beyond said end surface of the rigid support; characterized in that said pad
- the tool according to the invention allows the tool according to the invention to be particularly effective, particularly in terms of maintaining contact with the surface to be worked, including when it has large variations in altitude, for example when it 's acts on one side of a spectacle lens to correct the vision of a presbyopic, myopic and astigmatic carrier. Thanks to its performance in maintaining contact with the surface to be worked, the tool according to the invention makes it possible to obtain a particularly high level of surfacing quality, in particular but not exclusively for concave surfaces.
- an opening is formed in the distal portion of each said strap to engage this distal portion on a projecting element forming said attachment means ; said opening is oblong; said projecting element belongs to said rigid support; said projecting element belongs to a flange surrounding said rigid support; said central plate and said shoulder straps of said membrane are made in one piece; and / or said central plate is adhered by its second end surface to said second end surface of said interface.
- the tool further comprises a deformable ring interposed between said peripheral portion of the interface and said shoulder straps;
- said rigid support belongs to a base comprising a flexible collar surrounding said support, said elastically compressible interface being applied against and covering an end surface of said collar located on the same side as said end surface; and / or said base comprises a rigid core having a transverse end surface and a flexible sole applied against and covering said end surface, said rigid support being formed by said rigid core and by a so-called central portion of said soleplate located at right of said transverse end surface of the core, said collar being formed by a so-called peripheral portion of said sole, extending transversely beyond said end surface of said rigid core.
- FIG. 1 is a plan view of a surfacing tool according to the invention
- Figure 2 is a top view of the assembly formed of the tensioning membrane and the buffer, shown flat
- Figure 3 is the sectional view indicated by Ill-III in Figure 1
- FIG. 4 is a view similar to FIG. 3, but showing how the tool is deformed in contact with a concave working surface
- Figure 5 is a partial sectional view showing a variant of the attachment means of the straps.
- the tool 10 illustrated in the drawings comprises a base 11, an elastically compressible interface 12 secured to the base 11, a flexible buffer 13 secured to the interface 12 opposite the base 11, a membrane 14 for tensioning the pad 13 and a deformable ring 16 interposed between the peripheral portion of the interface 12 and the shoulder straps 18 of the membrane 14.
- the tool 10 is generally cylindrical symmetry of revolution and has an axis of symmetry noted X which defines a so-called longitudinal direction.
- the base 11 comprises a rigid core 20 and a flexible sole 21. On the side that is seen below in Figure 3, the base 11 has an end surface 25 which extends transversely.
- the interface 12 has a first end surface 26, a second end surface 27 and a side surface 28 extending from the periphery of the surface 26 to the periphery of the surface 27. In the absence of stress, or, as explained above, in a position not shown, the interface 12 has the general shape of a disk.
- the interface 12 by its surface 26, is applied against and covers the surface 25 of the base 11.
- the subjection between the base 11 and the interface 12 is here by gluing on all the surfaces 25 and 26 .
- the base 11 has a cavity 30 opening away from the end surface 25 and extending in the longitudinal direction over a portion of the thickness of the base 11.
- the cavity 30 is disposed centrally and is provided for mounting the tool 10 on the spindle head of a surfacing machine.
- the cavity 30 has a spherical portion 31 generally shaped like three-quarters of a sphere and a cylindrical portion 32 extending between the portion 31 and the outlet of the cavity 30.
- the spindle head adapted to be accommodated in the cavity 30 has a spherical portion end shaped as the portion 31 and a cylindrical portion of smaller diameter than the portion 32.
- connection between the base 11 and the spindle of the machine is by simple snapping, the material surrounding the cylindrical portion 31 being capable of deforming so that the spherical portion of the spindle head is housed in the portion 32.
- the tool 10 When the spindle head is engaged in the cavity 30, the tool 10 co-operates in a ball joint with respect to the spindle.
- the cavity 30 is formed in the rigid core 20, which will now be described in more detail.
- the core 20 comprises a body 35 and a head 36.
- the body 35 comprises an annular flange 37 and a threaded stud 38 projecting from the flange 37 on the side that is seen at the top in FIG. 2, the stud 38 being disposed in the center of the flange 37. It is in the stud 38 that the cavity 30 is formed.
- the end surface 40 of the body 35 shown at the bottom in FIG. 3 is flat and continuous, the respective end surfaces of the flange 37 and the stud 38 being flush with each other.
- the flange 37 is made of metal, for example steel, and the stud 38 is relatively rigid plastic overmolded on the flange 37.
- the rigidity of the stud 38 is chosen so that it can all at once do not deform at the surface 40 and deform at the cylindrical portion 32 to allow the pin head to snap into the cavity 30.
- the stud 38 On its outer surface protruding from the flange 37, the stud 38 has a thread allowing it to cooperate with the tapped bore that has in its center the head 36, which cooperates with the body 35 in the manner of a nut.
- the head 36 has a generally annular shape of the same external diameter as the flange 37, with two lateral recesses 41 to release two flat faces 42 parallel to each other and parallel to the axial or longitudinal direction X, to allow tighten and loosen the head 36 relative to the flange 37 with a conventional nut wrench.
- the sole 21 is here formed by a flexible wafer 51.
- the wafer 51 has the general shape of a disc having a diameter similar to that of the interface 12.
- the wafer 51 is arranged concentrically with the rest of the tool, and in particular concentrically with the interface 12 and the core 20.
- the wafer 51 here has a thickness similar to that of the membrane 14.
- the wafer 51 is secured to the core 20 by gluing its transverse end surface that is seen at the top in Figure 3 to the entire surface 40 .
- the transverse end surface of the wafer 51 which is seen below in FIG. 3 forms the transverse end surface 25 of the base 11.
- the central portion 51a of the wafer 51 located at the right of the end surface 40 can be considered as rigid since it can not bend like the peripheral portion 51b which is transversely Beyond the surface 40.
- the base 11 comprises: a rigid support 60 formed by the core 20 and the central portion 51a of the wafer 51, this rigid support having a transverse end surface corresponding to the central portion 25a the surface 25 located to the right of the end surface 40; and a flexible collar 61 formed by the peripheral portion 51b of the wafer 51, this collar surrounding the rigid support 60, the elastically compressible interface 12 being applied against and covering the end surface 25b of the collar 61 and the end surface 25a of the rigid support 60.
- the elastically compressible interface 12 comprises a central portion 12a which is at the right of the transverse end surface 40 or 25a and a peripheral portion 12b which is transversely transverse. beyond the transverse end surface 40 or 25a.
- the flexible pad 13 has a central portion 13a which is at the right of the end surface 40 or 25a and a peripheral portion
- the pad 13 In the absence of stress, the pad 13 has the general shape of a disc of diameter slightly larger than that of the interface 12. The thickness of the pad 13 is substantially smaller than the thickness of the interface 12 The membrane 14 is made of elastically extensible material of substantially smaller thickness than the thickness of the interface 12.
- the membrane 14 comprises a central plate 15 and a plurality of identical braces 18, here six in number, projecting radially from the periphery of the plate 15.
- a strong line such as placed on the rest of the tool 10
- one of the straps 18 is shown in FIG. flat dotted line.
- the pad 13 and the membrane 14 are shown flat.
- the plate 15 In the absence of stress, the plate 15 has the general shape of a disk of diameter similar to that of the interface 12.
- the central plate 15 has, on the side that is seen below in the figure
- transverse end surface 22 (side not visible in FIG. 2), a transverse end surface 22 and, on the side that is seen at the top in FIG. 3 (visible side in FIG. 2), a transverse end surface 23.
- the pad 13 is applied against and covers the end surface 22 and is secured to the membrane 14 by gluing over the entire surface 22.
- the plate 15 On the side opposite to the pad 13, the plate 15 is applied against and covers the end surface 27 of the interface 12. Here, the plate 15 is secured to the interface 12 by bonding its end surface 23 to the all of the end surface 27 of the interface 12.
- Each of the straps 18 has a distal portion in which is formed an opening 19 which is here oblong.
- the openings 19 are shaped differently, for example by being circular.
- the straps 18 are here in the form of a band whose width is greater on the side of the central plate 15 than on the side of the distal portion, the reduction in width being regular over the length of the straps.
- the central plate 15 and the straps 18 are made in one piece from a disc of material in which were cut the spaces originally between the straps.
- each of the straps 18 rotates around the lateral surface 28 of the interface 12 and around the deformable ring 16 and then extends to the stud 38 which is engaged in the opening 19, the stud 38 thus forming a means for attaching the distal portion of each strap 18 to the right of the end surface 26 of the interface 12.
- the respective distal portions of the straps 18 are stacked one on the other and are sandwiched between the body 35 and the head 36 of the core 20. When it is thus engaged with the stud 38, each of the straps 18 is stretched, its arrangement, and in particular replacement of the opening 19, having been provided accordingly.
- the arrangement of the straps 18 is here such that the interface 12, under the effect of the tensioning provided by the straps 18, takes a conformation where its peripheral portion 12b is raised, so that the surface 70 of the buffer 13 intended to come into contact with the surface to be worked is slightly convex.
- the tensioning of the buffer 13 through the membrane 14 offers the advantage of allowing easy adjustment of its intensity, by simply varying the location of the opening 19 of the shoulder straps 18, thus providing excellent repeatability. one tool to another.
- the elastically compressible interface 12 deforms to allow the surface 70 to conform to the surface 71. It can be seen that the interface 12 compresses strongly at the level of the central portion 12a.
- the lens 72 to which the surface 71 belongs is mounted on a rotating support (not shown) and the tool 10 is applied against the surface 71 with a force sufficient for the pad 13 to conform to its shape.
- the tool 10 is here, for its part, free to rotate while being however off-center with respect to the optical surface 71.
- the relative friction of the working surface 71 and the buffer 13 is sufficient to rotate the tool 10 in the same direction as the lens 72, about the axis X of symmetry.
- the optical surface 71 is sprayed with a non-abrasive or abrasive watering fluid, depending on whether or not the pad 13 performs this function.
- the tool 10 In order to scan the entire optical surface 71, the tool 10 is moved during the surfacing along a radial path, the point of intersection of the X axis of the tool 10 with the optical surface 71 making a movement. back and forth between two cusp points.
- the membrane 14 offers both a maintenance of tension of the buffer 13 and a surround of the periphery of the interface 12, allows the tool to be particularly effective in maintaining the contact with the surface 71 to work, including when it has large variations in altitude, for example if it is a side of a spectacle lens to correct the vision of a presbyopic wearer, myopic and astigmatic.
- the beneficial effect provided by the belting of the peripheral portion of the interface 12 by the straps 18, in particular as regards the uniformity of the pressure exerted on the working surface such as 71, is reinforced by the presence of the ring deformable 16, which also provides some standardization efforts because of its continuous nature.
- FIG. 5 illustrates a variant of the tool 10 in which the attachment means making it possible to engage the distal portions of the straps 18 are not formed by the stud 38 of the core 20, but by studs protruding from the sole 61
- the wafer 51 is replaced by a wafer 51 'having in an intermediate position between the core 20 and the ring 16, a nipple 55 with a domed head protruding from the side which is seen at the top in FIG. 3, that is opposite the interface 12.
- the straps 18 are shorter so that they can operate the desired tensioning by engagement of their opening 19 on the corresponding stud 55.
- the slab 51 'and the stud 55 are made of one-piece molded material, but it is of course possible to return the stud 55 or the like by gluing or any other fastening means.
- the attachment means of the straps such as 18, while remaining at the right of the end surface 26 of the interface 12, are different from the stud 38 and pins 55, for example, at least for certain straps, a portion of the spindle on which the tool is mounted; nipples similar to the pins 55 distributed around the periphery of a core such as 20 or a rigid support such as 60; or else fastening means not belonging to a core or rigid support, for example hooks located at locations similar to those of the pins 55.
- the securing between the assembly formed by the pad 13 and the membrane 14 to the rest of the tool comprises the bonding of the central plate 15 to the interface 12. This prevents the plate 15 can slide with respect to the interface 12.
- the fastening between the assembly formed by the pad such as 13 and the membrane such as 14 is only by the straps such as 18. It is also possible, in certain circumstances, to make the fastening of the core such as 20 or the rigid support such as 60 to the rest of the tool, only by the straps such as 18.
- the diameter of the buffer 13 is greater than the diameter of the plate 15. In a variant, the diameter of the buffer 13 is different, for example identical or even slightly smaller than the diameter of the plate 15.
- the buffer 13 is directly glued to the plate 15.
- an intermediate wafer is interposed between the buffer 13 and the plate 15.
- the end surface such as 40 or 25a is not flat but convex and / or the interface such as 12 has an initial conformation curved correspondingly while remaining equi-thick.
- the wafer 51 has a thickness substantially different from that of the membrane 14; an additional wafer, smaller in diameter than the wafer 51 and larger in diameter than the flange 37, is interposed between the flange 37 and the wafer 51; the rigid support 60 and the flange 61 are replaced by a rigid support and a flange arranged differently, for example as described in the French patent application 2 900 356 which corresponds to the international application WO 2007/128894; and / or there is no such flange.
- the invention is not limited to the examples described and shown.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0856075A FR2935627B1 (fr) | 2008-09-10 | 2008-09-10 | Outil de surfacage a qualite optique |
| PCT/FR2009/051651 WO2010029245A1 (fr) | 2008-09-10 | 2009-09-01 | Outil de surfaçage à qualité optique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2337652A1 true EP2337652A1 (fr) | 2011-06-29 |
| EP2337652B1 EP2337652B1 (fr) | 2012-11-14 |
Family
ID=40548715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09741349A Not-in-force EP2337652B1 (fr) | 2008-09-10 | 2009-09-01 | Outil de surfaçage à qualité optique |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8475237B2 (fr) |
| EP (1) | EP2337652B1 (fr) |
| CN (1) | CN102123825B (fr) |
| FR (1) | FR2935627B1 (fr) |
| WO (1) | WO2010029245A1 (fr) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140150815A1 (en) * | 2012-11-30 | 2014-06-05 | Applied Materials, Inc. | Disc-brush holder apparatus, disc-brush assembly, and substrate processing methods |
| CN105658376B (zh) | 2013-10-25 | 2020-05-26 | 依视路国际公司 | 光学品质表面修整工具 |
| CN105563300A (zh) * | 2016-01-08 | 2016-05-11 | 湖南大学 | 一种回转弹性体及研磨抛光设备 |
| CN105643428A (zh) * | 2016-01-08 | 2016-06-08 | 湖南大学 | 一种回转弹性体研磨抛光方法 |
| DE102016102223B4 (de) * | 2016-02-09 | 2025-10-16 | Lapmaster Wolters Gmbh | Doppel- oder Einseiten-Bearbeitungsmaschine und Verfahren zum Betreiben einer Doppel- oder Einseiten-Bearbeitungsmaschine |
| EP3272457B1 (fr) * | 2016-07-21 | 2019-03-27 | Delamare Sovra | Procédé de fabrication en série d'outils à polir de qualité optique |
| EP3272456B1 (fr) * | 2016-07-21 | 2019-03-13 | Delamare Sovra | Procédé de fabrication en série d'outils de polissage de qualité optique |
| EP3272458B1 (fr) | 2016-07-21 | 2019-03-27 | Delamare Sovra | Procédé de fabrication en série d'outils de polissage de qualité optique |
| FR3059921B1 (fr) | 2016-12-09 | 2019-05-24 | Essilor International | Outil de surfacage a qualite optique |
| CN107116750B (zh) * | 2017-04-01 | 2019-01-22 | 浙江工业职业技术学院 | 一种尾灯灯罩的加工系统 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US610762A (en) * | 1898-09-13 | Buffing-pad | ||
| US391581A (en) * | 1888-10-23 | James w | ||
| US6285506B1 (en) * | 1999-01-21 | 2001-09-04 | X-Ray Optical Systems, Inc. | Curved optical device and method of fabrication |
| DE10144274A1 (de) * | 2001-09-08 | 2003-03-27 | Bosch Gmbh Robert | Schleifplatte |
| FR2834662B1 (fr) * | 2002-01-16 | 2004-05-14 | Essilor Int | Outil pour le surfacage d'une surface optique |
| FR2857610B1 (fr) * | 2003-07-16 | 2006-03-17 | Essilor Int | Outil pour le surfacade d'une surface optique |
| FR2867558B1 (fr) * | 2004-03-11 | 2006-06-30 | Sagem | Dispositif de releve de la topograhie d'une surface optique |
| EP1655102B1 (fr) * | 2004-11-09 | 2008-01-09 | Seiko Epson Corporation | Outil de polissage élastique et méthode de polissage d'une lentille utilisant cet outil |
| US7618306B2 (en) * | 2005-09-22 | 2009-11-17 | 3M Innovative Properties Company | Conformable abrasive articles and methods of making and using the same |
| FR2900356B1 (fr) | 2006-04-27 | 2008-07-18 | Essilor Int | Outil de surfacage d'une surface optique |
-
2008
- 2008-09-10 FR FR0856075A patent/FR2935627B1/fr not_active Expired - Fee Related
-
2009
- 2009-09-01 CN CN2009801326937A patent/CN102123825B/zh not_active Expired - Fee Related
- 2009-09-01 US US13/057,516 patent/US8475237B2/en active Active
- 2009-09-01 EP EP09741349A patent/EP2337652B1/fr not_active Not-in-force
- 2009-09-01 WO PCT/FR2009/051651 patent/WO2010029245A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010029245A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102123825A (zh) | 2011-07-13 |
| WO2010029245A1 (fr) | 2010-03-18 |
| EP2337652B1 (fr) | 2012-11-14 |
| US20110136416A1 (en) | 2011-06-09 |
| FR2935627A1 (fr) | 2010-03-12 |
| FR2935627B1 (fr) | 2010-09-03 |
| US8475237B2 (en) | 2013-07-02 |
| CN102123825B (zh) | 2013-06-05 |
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