JP2007260818A - Polishing method and polishing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polishing method for sufficiently polishing a polished surface of an optical element, particularly a curved polished surface (concave/convex surface) in every corner, and to provide a polishing tool. <P>SOLUTION: Polishing is carried out by impregnating a cotton portion 13 with abrasive solution. Specifically, cotton is coarsely wound on a core bar, and then the cotton is tightly wound from above, to thereby form the cotton portion 13 having an arbitrary pressure distribution imparted to the polishing tool 10. Then the cotton portion 13 is impregnated with the abrasive solution. The shape of the cotton wound on the core bar may be made slender, or may be like a disk radially extending from the core bar. Further a hydrophilic adhesive may be employed. Furthermore a portion of the core bar, where the cotton is not wound, may be coated with a water-repellent coating. Alternatively an abrasive solution feeding pipe 11 may be employed as the core bar, and while the abrasive solution is fed to the cotton portion via the abrasive solution feeding pipe 11, curved surface polishing is carried out. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a polishing method and a polishing tool for polishing a polishing surface of an optical element, for example, a polishing method and a polishing tool for polishing a polishing surface of an optical element such as a small-diameter mold member, a minute optical lens, a prism, and a mirror.

  Conventionally, industrial cotton swabs have been used for removing dust from molds (see, for example, Patent Document 1), and in particular, have been used for cleaning narrow spaces and small areas of precision equipment (for example, Patent Document 2). 0003 and FIGS. 1 to 4).

  Also known is a cotton swab that uses a soft material of cotton, forms a urethane resin layer on the surface of the cotton, and cleans the details of precision instruments (eg, Patent Document 3, claim 1, paragraph 0010 and figure). 1).

  On the other hand, when cleaning a curved surface of an optical element such as a small-diameter mold member, a minute optical lens, a prism, or a mirror, a polishing woven fabric or non-woven fabric is used (for example, 0014 paragraph and figure of Patent Document 4). 4).

When polishing the curved surface of the optical element, the following is used. That is, a polishing tool formed by kneading and overheating compression of a pulverized material of wood and a thermosetting resin mainly composed of one of a urethane resin, an epoxy resin, and a phenol resin (for example, Patent Document 5) 0053 paragraph and FIG. 1), a woven cloth made of cotton yarn as a carrier, and a polishing cloth carrying a polishing medium on the woven cloth (for example, see paragraph 0025 of FIG. 6 and FIG. 1), flexible A polishing rod (see, for example, paragraph 0035 of Patent Document 6 and FIG. 3B), a polishing pad, a polisher tool (for example, paragraph 0032 of Patent Document 7 and FIG. 1 and a polishing grindstone (for example, 0026 to 0027, 0031 paragraph and FIG. 3 of Patent Document 8) are used.
JP-A-7-188959 Japanese Patent Laid-Open No. 10-57904, paragraph 0003 and FIGS. Japanese Patent Publication No. 7-28893, claim 1, paragraph 0010, and FIG. Japanese Patent Laid-Open No. 2001-305700, paragraph 0014 and FIG. Japanese Patent Laid-Open No. 2001-138196, paragraph 0053 and FIG. Japanese Patent Laid-Open No. 2002-239925, paragraphs 0025 and 0035, and FIGS. 1 and 3B. Japanese Patent Laid-Open No. 2000-317797, paragraph 0032 and FIG. Japanese Patent Laid-Open No. 8-229792, paragraphs 0026 to 0027, paragraph 0031, and FIG.

  However, with a woven or non-woven fabric for polishing, the curved surfaces (uneven surfaces, etc.) of optical elements such as small-diameter mold members and minute optical lenses cannot be sufficiently polished.

  Further, in a conventional polishing pad or polisher tool, as shown in FIG. 5A, when the concave polishing surface 3a of the optical element 3 is polished by a lump of cotton 2 provided at the tip of the core rod 1. As shown in the pressure distribution curve 4 shown in FIG. 5B, the polishing pressure is concentrated near the center of the polishing surface 3a. Therefore, the polishing pressure becomes sparse in the vicinity of the polishing surface 3a. As a result, there is a problem in that the amount of wear due to polishing of the polishing surface 3a is biased and shape errors are likely to occur.

  Then, this invention aims at providing the grinding | polishing method and grinding | polishing tool which can fully grind to every corner of an uneven surface.

  Examples of the solution means of the present invention for solving the above-described problems are as follows.

(1) A polishing method characterized in that a polishing portion is formed by providing a cotton portion at the tip portion of the core rod, and a polishing liquid is soaked into the cotton portion of the polishing tool to polish the polishing surface of the optical element.

(2) First, roughly wrap cotton around the tip of the core rod, and then tightly wrap the cotton from above to form the cotton portion of the polishing tool, and soak the polishing liquid into the cotton portion of the polishing tool to polish the optical element. A polishing method comprising polishing a surface.

(3) A polishing tool characterized in that cotton is roughly wound around the tip portion of the core rod, and the cotton portion is formed by densely winding cotton from above.

(4) In the above polishing tool, a polishing tool characterized in that the shape of a cotton part formed by winding cotton around a core rod is elongated in the axial direction of the core rod.

(5) In the above polishing tool, the polishing is characterized in that the shape of the cotton part formed by winding cotton around the core rod is a disk extending radially with respect to the axis of the core rod. tool.

(6) A polishing tool characterized in that in the above polishing tool, a cotton portion is formed on the core rod using a hydrophilic adhesive.

(7) A polishing tool characterized in that a water-repellent paint is applied to a core rod portion in which cotton is not wound in the above polishing tool.

(8) A polishing liquid supply pipe for supplying a polishing liquid is provided as a core rod, and the polishing surface of the optical element is polished while supplying the polishing liquid to the cotton portion through the polishing liquid supply pipe. Polishing method.

(9) The polishing tool as described above, wherein a polishing liquid supply pipe for supplying the polishing liquid is provided as a core rod.

  According to the present invention, it is easy to give gloss without damaging the polished surface. Moreover, even when the polished surface is an uneven surface, it can be sufficiently polished to every corner.

  Also, when the cotton part of the polishing tool is formed by roughly winding the cotton around the tip of the core rod and densely winding the cotton from above, give the cotton part of the polishing tool the desired hardness and softness. Can do. Moreover, the pressure distribution can be easily adjusted by partially changing the elasticity of the cotton portion. If such a cotton part is used, it will be ensured that it is sufficiently polished to every corner of the uneven surface.

  Further, according to the present invention, the amount of polishing liquid in the processed portion of the polishing surface is always stable, and excess liquid in the processed portion of the polishing surface is sucked back into the cotton portion by capillary action, Since the liquid existing at the center of the cotton portion oozes out to the surface of the cotton portion as the material is dried, there is no fear of the liquid running out and stable polishing is possible.

  A cotton part is provided at the tip of the core rod. For example, the core rod is first wound roughly with cotton and then densely wound with cotton. In this way a cotton part is made on the polishing tool.

  A polishing solution is soaked into the cotton part of the polishing tool to polish the polishing surface of the optical element, particularly the curved polishing surface.

  Preferably, cotton is roughly wound around a core rod, and then cotton is densely wound on the core rod to form a cotton portion for polishing in the form of a cotton swab. At that time, the shape in which the core rod is wound with cotton is elongated or the shape in which the core rod is wound with cotton is formed into a disk shape extending in the radial direction with respect to the core rod.

  Preferably, cotton is wound around the core rod using a hydrophilic adhesive.

  More preferably, the water-repellent paint is applied to the core rod portion not wound with cotton.

  Preferably, a polishing liquid supply pipe for supplying a polishing liquid is provided as a core rod, and curved surface polishing is performed while supplying the polishing liquid to the cotton portion through the polishing liquid supply pipe. In this case, it is possible to fill the cotton part of the polishing tool with the polishing liquid by capillary action simply by putting the polishing liquid into the container and immersing the rear end of the core rod directly or through a pipe or the like. Become. Moreover, you may supply polishing liquid like the drip currently used in the hospital.

  A preferred embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows an example of a method for polishing a polishing surface of an optical element, particularly a concave curved surface, using a polishing tool 10 in the form of a cotton swab.

  The core rod includes a polishing liquid supply pipe 11 that also functions as a polishing liquid holding means for storing the polishing liquid. The polishing liquid supply pipe 11 is formed of a cylindrical rigid body so that it can be held by hand. The inside of the polishing liquid supply pipe 11 is filled with a porous material 12 for soaking and storing the polishing liquid from the front end to the rear end. In the example of FIG. 1, a sponge is used as the porous material 12 having a capillary function.

  If the preferable example of the polishing liquid supply pipe | tube 11 is demonstrated in detail, it is a pipe | tube made from aluminum and resin, and an internal diameter is 0.5-8 mm. At the tip of the polishing liquid supply pipe 11, the porous material 12 protrudes in a substantially round shape to form a protrusion 12 a.

  Reference numeral 13 denotes a cotton portion (lumps) in which cotton is thread-like and wound around the polishing liquid supply pipe 11 and fixed. The polishing liquid sucked into the porous material 12 can be gradually supplied to the cotton portion 13 by capillary action.

  A preferable structure of the cotton portion 13 is one in which the cotton yarn is wound around the polishing liquid supply pipe 11 so as to become dense from the center toward the outside. In particular, a cotton swab-shaped polishing tool 10 having a structure in which the distribution of elasticity is arbitrarily adjusted is preferable.

  Reference numeral 14 denotes an optical element (work) such as a lens or a mold, which has a polished surface 14a having a concave or convex curved surface.

  Reference numeral 15 denotes a distribution curve of the polishing pressure applied when the cotton portion 13 is brought into contact with the polishing surface 14 a of the optical element 14.

  Polishing is performed while swinging the swab-shaped polishing tool 10 and rotating the optical element 14 as necessary. Although the polishing liquid evaporates or scatters during polishing, the polishing liquid that has accumulated in the porous material 12 in the polishing liquid supply pipe 11 gradually oozes out to the cotton portion 13, so there is a risk of running out of liquid. And the trouble of supplying the polishing liquid is eliminated.

  An example of a polishing liquid replenishment method for the porous material 12 will be described. The rear end of the polishing liquid supply pipe 11 is immersed in a container (not shown) containing the polishing liquid. Then, the polishing liquid is sucked up by capillary action and can be replenished into the porous material 12.

  In addition, the polishing material can be replenished to the porous material 12 by various other methods. For example, the polishing liquid supply pipe 11 can be replenished from above the polishing liquid supply pipe 11 like an infusion device used in a hospital. In this case, the porous material 12 can be omitted.

  The polishing liquid can be forcibly supplied (for example, by a pump) by connecting the upper end side of the polishing liquid supply pipe 11 and a tank (not shown) containing the polishing liquid with a tube (not shown).

  An arbitrary elastic pressure distribution curve 15 can be obtained by devising how to wind the cotton portion 13 and adjusting the center portion and the outer peripheral portion so as to be dense. In this case, when it is desired to intensively polish a minute portion in a spot manner, a cotton portion having a dense center and a loosely wound outer periphery can be used.

  FIG. 2 shows various other embodiments of the present invention.

  In order to effectively adjust the pressure distribution curve 15, in the embodiment shown in FIG. 2A, the shape of the cotton portion 13 is narrowed.

  In the embodiment shown in FIG. 2B, the shape of the cotton portion 13 is changed to the shape of a disk extending in the radial direction so that the optical element 14 having a convex polished surface 14a is complicated. Even if there is, we can polish to every corner efficiently.

  In the embodiment of FIG. 2C, the cotton portion 13 is substantially spherical, and a small protrusion is formed at the center of rotation.

  In the embodiment of FIG. 2D, the lower end surface of the cotton portion 13 is circular.

  As shown in FIGS. 2 (A) and 2 (C), by using a shape in which a protrusion is provided at a part of the tip of the polishing liquid supply pipe 20, a partially intensive polishing method can be achieved.

  In the embodiment shown in FIGS. 2A to 2D, the core rod 20 may be solid, but it has a tubular shape (tubular shape) similar to that shown in FIG. It is preferable to fill a functional material. However, depending on how the polishing liquid is supplied, filling of such a material may be omitted.

  As yet another embodiment, FIG. 3 shows a form using a hydrophilic adhesive in the cotton portion 13 of the polishing tool according to the present invention.

  In FIG. 3, 15 indicates a polishing liquid, and 16 indicates an abrasive in the polishing slurry. 13 a indicates a rough portion of the cotton portion 13, and 13 b indicates a dense portion of the cotton portion 13. Reference numeral 17 denotes a hydrophilic adhesive provided between them. The adhesive 17 is applied to the surface of the dense portion 13b of the cotton portion 13, and the coarse portion 13a of the cotton portion 13 is adhered thereon.

  It is to be noted that the best mode is to apply the hydrophilic adhesive 17 to the entire cotton in the form of a thread and form the rough portion 13a and the dense portion 13b of the cotton portion 13 with such a thread-like material. One.

  With such a form, the abrasive 16 in the polishing slurry is caused by the hydrophilic action by the hydrophilic adhesive 17 applied to the surface of the dense portion 13b of the cotton portion 13 or each surface of the thread-like cotton. It becomes easy to be adsorbed and held by the rough portion 13a of the surface layer of the cotton portion 13, and has a good polishing action on the polishing surface 14a of the optical element (work) 14, and the abrasive 16 is detached from the surface of the cotton portion 13 due to friction or the like. Repeatedly, the effect of efficiently acting on the cotton portion 13 and the polishing surface 14a of the optical element 14 is obtained.

  FIG. 4 shows a polishing tool in which a water-repellent paint 42 is applied to the entire portion of the outer peripheral surface of the core rod tube 41 that is not wound with cotton.

  In FIG. 4, 43 is a cotton part, 40 is a polishing liquid, and 44 is an optical element. The polishing liquid 40 is supplied in a pool shape over the entire processing portion so as to sufficiently act on the polishing surface 44 a of the optical element 44. The water repellent paint 42 efficiently acts on the polishing surface 44a due to its water repellent effect. For this purpose, a minimum amount of liquid may be added. It is possible to quickly recognize the polishing site and the dirt of the polishing liquid.

  3 to 4, the polishing liquid may be supplied directly to the polishing surfaces 14a and 44a of the optical elements 14 and 44 without passing through the core rod.

  In any of the above-described embodiments, the curved surface of optical elements such as small-diameter mold members, minute optical lenses, prisms, and mirrors is accurately polished using the softness and softness of the cotton in the cotton portion. It is possible to give gloss without damaging the polished surface, and to sufficiently polish every corner of the uneven surface.

  Furthermore, it is possible to adjust the pressure distribution by changing the elasticity partly by giving the polishing tool the desired hardness and softness by roughly winding the cotton around the core rod and winding the cotton densely from above. it can.

  Moreover, even when the polishing liquid is replenished, even if the polishing liquid evaporates during the polishing operation, the polishing liquid can be supplied spontaneously and sufficient polishing can be realized by utilizing the capillary action of cotton. .

(A) shows a polishing method according to one embodiment of the present invention. (B) shows a polishing pressure distribution curve on the polishing surface of the optical element of FIG. (A)-(D) show the grinding | polishing method by the other various Example of this invention. 4 shows a polishing method according to still another embodiment of the present invention. 4 shows a polishing method according to still another embodiment of the present invention. (A) shows the conventional grinding | polishing method. FIG. 5B shows a pressure distribution curve on the processed surface of the optical element in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Polishing tool 11 Polishing liquid supply pipe 12 Porous material 13 Cotton part 13a Coarse part 13b of cotton part 13 Dense part 14 of cotton part 13 Optical element (workpiece)
14a Polishing surface 15 Pressure distribution curve 16 Polishing material 17 Hydrophilic adhesive 40 Polishing liquid 41 Tube 42 Water-repellent paint 43 Cotton portion 44 Optical element 44a Polishing surface

Claims (9)

  A polishing method comprising: forming a polishing tool by providing a cotton portion at a tip portion of a core rod; and polishing a polishing surface of an optical element by impregnating a polishing liquid into the cotton portion of the polishing tool.   First, coarsely wrap cotton around the tip of the core rod, and then wrap the cotton tightly from above to form the cotton part of the polishing tool. The polishing part is soaked into the cotton part of the polishing tool to polish the polishing surface of the optical element. A polishing method comprising:   A polishing tool characterized in that cotton is roughly wound around the tip of the core rod, and cotton is densely wound from above to form a cotton portion.   4. The polishing tool according to claim 3, wherein the shape of a cotton portion formed by winding cotton around the core rod is elongated in the axial direction of the core rod.   4. The polishing tool according to claim 3, wherein the shape of the cotton portion formed by winding cotton around the core rod is a disk extending radially with respect to the axis of the core rod. Polishing tool. The polishing tool according to any one of claims 3 to 5,
A polishing tool wherein a cotton part is formed on a core bar using a hydrophilic adhesive. The polishing tool according to any one of claims 3 to 6,
A polishing tool, characterized in that a water-repellent paint is applied to a core rod portion on which cotton is not wound.   3. A polishing liquid supply pipe for supplying a polishing liquid is provided as a core rod, and the polishing surface of the optical element is polished while supplying the polishing liquid to the cotton portion through the polishing liquid supply pipe. The polishing method according to 1. The polishing tool according to claim 3, wherein a polishing liquid supply pipe for supplying the polishing liquid is provided as a core rod.

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