JP2008055575A - Grinder and grinding method of metal-coated surface using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinder and a grinding method suitable for realizing a finishing surface under a mirror-face condition with little fine scratches or buffer marks capable of shortening a finish-grinding time at the time of finish-grinding for removing fine scratches and buffer marks existing on the grinding face after grinding using a grinder, wherein a back side of a grinding cloth is affixed to one side of an elastic plate, means fixed to a rotary disc on a rotary grinding device side is provided on the other side of the elastic plate, the grinding cloth is constituted by implanting wool fibers on a surface side of a base cloth, and vertical grooves and horizontal grooves are formed on the face with the wool fibers implanted in a lattice-like manner. <P>SOLUTION: In this grinder, cotton fibers are implanted on a surface side of a base cloth, and vertical grooves and horizontal grooves are formed in the face with the cotton fibers implanted in a lattice-like manner. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a polishing disk that is used by being attached to a rotating disk of a rotary polishing apparatus when polishing or polishing a metal or other processed surface or a coated surface, and a polishing method using the polishing disk.

  With respect to a polishing machine that is used by being attached to a rotating disk of a rotary polishing device, conventionally, the back surface of the polishing cloth is fixed to one surface side of the elastic plate, and fixed to the rotating disk of the rotary polishing device on the other surface side of the elastic plate. A device provided with means has been proposed (Patent Document 1). A polishing disk is rotated via a rotary polishing device so that the surface of the polishing cloth is brought into contact with the surface of the object to be polished (this “surface of the object to be polished” may be referred to as “polishing surface” in this specification). Polishing is performed. Such a polishing disk can abut the outer peripheral portion on the surface (polishing surface) of the object to be polished, can effectively use the outer peripheral portion having the highest linear velocity for polishing, and can be easily replaced when it becomes dirty.

  In such a conventionally known polishing machine, a configuration in which a polishing cloth that comes into contact with the surface (polishing surface) of an object to be polished is formed by implanting wool fibers having a predetermined length on the surface side of the base cloth is used. Proposed. In this conventional technique, a plurality of rows of grooves extending in a certain direction, for example, the vertical direction, are formed for each predetermined width in the surface where the wool fibers are implanted (Patent Document 2). Hereinafter, in the present specification and drawings, a polishing disk having a configuration in which the back surface of a polishing cloth configured by planting wool fibers of a predetermined length on the surface side of the base cloth is fixed to one surface side of an elastic plate, and a base The back side of the polishing cloth constructed by planting wool fibers of a predetermined length on the surface side of the cloth is fixed to one side of the elastic plate, and is constant for each predetermined width within the surface on which the wool fibers are planted. In other words, for example, a polishing board having a plurality of rows of grooves extending in the vertical direction may be collectively referred to as “wool buff”.

  In the polishing operation, after performing paper polishing using an appropriate compound, liquid, and paper such as water-resistant paper, polishing is performed using a wool buff, and then sponge polishing is performed using a sponge buff. It may be finished.

  Further, conventionally, with respect to such a polishing method, by appropriately selecting the roughness of the polishing member such as sandpaper to be used and the roughness of the compound used in combination with the polishing member, buffing can be reduced. And the grinding | polishing method of the metal coating surface which can implement | achieve the finishing surface excellent in glossiness and durability was also proposed (patent document 3).

  In addition, sponge polishing using a sponge buff performed after polishing using a wool buff by the above-described polishing method is finish polishing that erases the buff remaining after polishing with the wool buff. During cloth polishing performed using a wool buff, the buff remaining on the surface (polishing surface) of the object to be polished is finally finished by sponge polishing.

Therefore, in this case, for the purpose of proposing a polishing disk in which the surface (polishing surface) of the object to be polished is not easily buffed, the back side of the polishing cloth is fixed to one side of the elastic plate, A polishing machine provided with a means for fixing to a rotary disk on the rotary polishing apparatus side on the other side, wherein the polishing cloth is configured by implanting wool fibers on the surface side of the base cloth, and There has been proposed a polishing machine in which longitudinal grooves and lateral grooves are formed in a lattice shape in a surface in which wool fibers are implanted (Patent Document 4). Hereinafter, in the present specification and drawings, the polishing cloth proposed in Patent Document 4 is configured by implanting wool fibers on the surface side of a base cloth, and in the plane in which the wool fibers are implanted. In addition, a polishing disk in which vertical grooves and horizontal grooves are formed in a lattice shape may be referred to as “cross wool”.
Japanese Utility Model Publication No. 4-92769 JP 2002-239920 A JP-A-2-256456 International Publication No. WO2005 / 063444 A1

  According to the inventions proposed in Patent Documents 2, 3, 4 and the like described above, great results have been achieved in realizing a finished surface with less buffing, excellent gloss, and excellent durability.

  However, even when polishing is performed using the cross wool proposed in Patent Document 4, minute scratches and buffs may remain on the polishing surface (the surface of the object to be polished), which is removed. For this reason, it was necessary to use a fine-fine to ultrafine particle compound and finish polishing using a sponge buff.

  In finishing polishing using this sponge buff, a resin finish may be used for the purpose of improving the finished surface. This is because the resin finishing agent used here has an effect of embedding minute scratches remaining on the polished surface and improving the finished surface.

  However, since the resin finish is removed by washing with water, the resin finish is eventually left on the surface (polishing surface) of the object to be polished at the time of polishing using the cross wool proposed in Patent Document 4. The fine scratches and buffs that have been observed are visible, and the finished surface is not good, that is, it is not a mirror surface.

  In view of this, the present invention proposes fine scratches and buffs remaining on the polished surface (the surface of the object to be polished) after polishing using cross wool proposed in Patent Document 4 When polishing for finishing to remove rust, it is not necessary to use a resin finish that was used when polishing with a conventional sponge buff. In addition, it is an object to provide a polishing machine and a polishing method suitable for realizing a mirror-finished surface in which minute scratches and buffs are hardly left on the finished surface after finishing polishing. I have to.

  In order to achieve the above object, the polishing disk proposed by the present invention has a back surface side of the polishing cloth fixed to one surface side of the elastic plate, and a fixing means to the rotating disk on the rotary polishing apparatus side on the other surface side of the elastic plate. The polishing cloth is constructed by implanting cotton fibers on the surface side of the base cloth, and vertical grooves and lateral grooves are latticed in the surface on which the cotton fibers are implanted. It is formed in a shape.

  In the following description and drawings, the back side of the polishing cloth is fixed to one side of the elastic plate, and a fixing means for the rotary plate on the rotary polishing apparatus side is provided on the other side of the elastic plate. The polishing cloth is constructed by implanting cotton fibers on the surface side of the base cloth, and the longitudinal grooves and the lateral grooves are formed in a lattice pattern in the surface where the cotton fibers are implanted. The polishing board is sometimes referred to as “cross cotton”.

  In order to remove the fine scratches and buffs remaining on the polished surface after the polishing performed using the cross wool of Patent Document 4, the applicant of the present invention who proposed the aforementioned cross wool (Patent Document 4). It is not necessary to use a resin finishing agent for the final polishing (sponge polishing using a sponge buff), and the time for the final polishing process can be shortened. As a result of intensive studies on a polishing machine suitable for realizing a mirror-finished surface with almost no scratches or buffs and a polishing method, the conventional cloth wool proposed in Patent Document 4 It has been found that these objects can be achieved by using a polishing machine in which cotton fibers are implanted instead of wool fibers on the surface side.

  This is because the cotton fiber is softer than the wool fiber, and the polished surface is less likely to be scratched, while the cotton fiber is traditionally used for finishing polishing sponge polishing. This may be because the grinding force is greater than the sponge buff.

  As described above, the polishing disk (cross cotton) of the present invention was completed based on the cross wool described in Patent Document 4 proposed by the applicant of the present application. The basic configuration is the same as the cross wool described in Patent Document 4.

  That is, when the above-described polishing is performed, polishing in a form in which a plurality of grooves extending in a certain direction, for example, the vertical direction, are formed at predetermined intervals on the surface of the polishing disk that contacts the object to be polished. In the disc, there are places where the plurality of rows of grooves are substantially perpendicular to the rotational direction of the polishing disc. At this point, as will be described later, the “escape” of the liquid agent and the compound used at the time of polishing is formed only in one direction. Therefore, the vertical grooves and the horizontal grooves are crossed in a lattice pattern so that the “escape” of the liquid agent and the compound is always formed in four directions when the polishing machine rotates. In other words, when the polishing machine rotates, the baffles generated when the polishing machine of the present invention is used for polishing are reduced by allowing the liquid agent and compound to escape in both the longitudinal and lateral grooves. is there.

  The elastic plate constituting the polishing disk (cross cotton) of the present invention is a polishing cloth that alleviates the influence of polishing workers, operation of the polishing apparatus (rotary polishing machine), unevenness of the surface of the polishing object, etc. It is desirable that the surface of the substrate is brought into contact with the polishing surface with a uniform pressure. Therefore, a conventionally known elastic material such as sponge or rubber material can be adopted as the material of the elastic plate. The thickness and shape can be determined as appropriate, but since the surface (polishing surface) of the object to be polished is polished by a rotational motion, it is generally a disk shape.

  In the polishing cloth constituted by implanting cotton fibers on the surface side of the base cloth, the thickness, length and density of the cotton fibers are appropriately selected according to the purpose and application of polishing. Similarly, the widths and intervals of the vertical and horizontal grooves formed in the surface where the cotton fibers are planted are also appropriately selected according to the purpose and application of the polishing.

  The longitudinal grooves and the lateral grooves are provided in a lattice pattern on the surface side of the polishing cloth that is in contact with the object to be polished. This is to provide a groove. In this way, when a groove having a direction substantially coincident with the rotation direction (tangential direction) is provided on the surface of the polishing cloth of the polishing disk, the liquid or the compound accumulated in the groove flows appropriately along the groove. In combination with the fact that the fibers implanted in the base cloth are cotton fibers, it is possible to polish without excessively buffing the surface (polishing surface) of the object to be polished.

  The polishing disk (cross cotton) of the present invention is attached to the rotating disk on the rotary polishing apparatus side. Then, the polishing disk is rotated by rotating the polishing disk while the surface side of the polishing disk (the surface side of the polishing cloth) is in contact with the object to be polished. It is necessary not to be easily detached from the turntable. Also, it is convenient if the polishing disk can be easily attached to and detached from the rotating disk of the rotary polishing apparatus so that it can be replaced according to the purpose and application of the polishing. From such a viewpoint, a velvet fastener material can be used as a fixing means to the rotating disk on the rotary polishing apparatus side provided on the other surface side of the elastic plate. Since the velvet fastener material is a pair of males and females that are engaged with each other, one of the velvet fastener materials forming the male and female is attached to the other surface of the elastic plate, and the other is attached to the rotary disk on the rotary polishing apparatus side. .

  In the polishing disk (cross cotton) of the present invention, it is desirable to provide a through hole in the center of the elastic plate and the polishing cloth. These through holes allow the liquid agent and compound used for polishing to escape into the through hole so that the liquid agent and compound collected near the center do not become thick when a phenomenon occurs in which the liquid gathers near the center due to the rotational movement of the polishing machine. Storing near the center. When liquid agents and compounds gather near the center of the polishing board, the distribution of these compounds and the like becomes non-uniform, and the degree of polishing differs between the vicinity of the center of the polishing board and the vicinity of the outer periphery, and uneven polishing may occur. In order to avoid this, a through-hole capable of storing the liquid agent and the compound collected near the center of the polishing board is provided.

  In addition, the protrusion which protrudes to the said elastic board side is provided in the rotation center part of the rotary disk of the rotary polishing apparatus to which the other surface side of the elastic board which comprises the grinding | polishing board (cross cotton) of this invention is fixed. When the form is adopted, when the other surface side of the elastic plate is fixed to the rotating disk of the rotary polishing device via the fixing means (for example, velvet fastener material), the protrusion is formed at the central portion of the elastic plate. Centering can be easily performed by fitting into the through holes. In addition, by this, the rotating disk of the rotary polishing apparatus rotates, and accordingly, the balance when the polishing disk of the present invention rotates can be improved.

  Next, in order to achieve the above object, the metal coating surface polishing method proposed by the present invention includes a first step of sanding or emptying the metal coating surface with sandpaper, and a polishing cloth on one side of the elastic plate. A polishing plate having a back side fixed thereto and a fixing means to a rotating plate on the rotary polishing device side provided on the other surface side of the elastic plate, wherein the polishing cloth implants wool fibers on the surface side of the base cloth. Polishing after the first step by holding a fine compound on a polishing machine in which vertical grooves and horizontal grooves are formed in a lattice pattern in the surface where the wool fibers are planted. A polishing step comprising a second step of polishing the surface, a back side of the polishing cloth fixed to one side of the elastic plate, and a means for fixing the rotary plate on the rotary polishing device side on the other side of the elastic plate The polishing cloth is constructed by implanting cotton fibers on the surface side of the base cloth. In the third method, the polishing surface in which the vertical grooves and the horizontal grooves are formed in a lattice shape in the surface on which the cotton fibers are planted is held by holding a compound of ultrafine particles to polish the polished surface after the second step. A process.

  Conventionally, in the method for polishing a metal-coated surface, as shown in FIG. 5, the fine compound is held in the first step of water-polishing or air-polishing the metal-coated surface with sandpaper, wool buff or cloth wool, Includes a second step of polishing the polished surface after the first step, a third step of polishing the polished surface after the second step by holding a compound of ultrafine to ultrafine particles in the sponge buff Was adopted.

  In the third step, as described above, a resin finish may be used for the purpose of improving the finished surface.

  The method for polishing a metal-coated surface of the present invention is the polishing of the polished surface after the first step by holding a fine compound on the cross wool in the second step, and then the polishing of the present invention described above in the third step. A board (cross cotton) is held by holding a compound of ultrafine particles and polished.

  According to the method for polishing a metal-coated surface of the present invention, finishing polishing (described above) is performed to remove minute scratches and buffs remaining on the polishing surface (surface of the object to be polished) after the second step. In the polishing disk (cross cotton) according to the present invention, a resin finishing agent that may have been used in polishing using a conventional sponge buff is used. There is no need. In addition, it was possible to shorten the time of the final polishing process, and to realize a mirror-finished surface with little scratches or buffs remaining on the finished surface after final polishing.

  This is because the cotton fibers implanted on the surface side of the base cloth in the polishing disk (cross cotton) of the present invention described above are implanted on the surface side of the base cloth in the polishing disk used in the second step. It is softer than the wool fibers that are used, and this makes it difficult to damage the polished surface. On the other hand, in the third step (finish polishing) of the present invention, compared to the sponge buff used in the conventional third step (finish polishing). It is considered that the grinding force of the cotton fibers implanted on the surface side of the base cloth in the polishing disk (cross cotton) of the present invention used is larger.

  In the above, as the fine compound, a compound having a particle size of 5 μm to 30 μm and a hardness of 7 to 9, preferably a particle size of 5 μm to 20 μm and a hardness of 7 to 9 can be used.

  In the above, as the ultrafine particle compound, a compound having a particle size of less than 2 μm and a hardness of 7 to 9, preferably a particle size of less than 1 μm and a hardness of 7 to 9 can be used.

  These fine compounds and ultrafine particles may be made of materials usually used in this technical field such as alumina and silica.

  Thus, the first step of water-polishing or air-polishing the metal-coated surface with sandpaper, and the cloth wool having a particle size of 5 to 30 μm and a hardness of 7 to 9, preferably a particle size of 5 to 20 μm and a hardness of 7 to 9 The second step of polishing the polished surface after the first step while holding the fine compound of the above, and the cloth cotton of the present invention has a particle size of less than 2 μm and a hardness of 7-9, preferably a particle size of less than 1 μm and a hardness It is necessary to use a resin finish by carrying out the polishing method of the present invention comprising the third step of polishing the polished surface after the second step while holding a compound of ultrafine particles of 7 to 9 It is suitable for realizing a mirror-finished surface that can shorten the time of the final polishing process and that has almost no microscopic scratches or buffs on the final surface after final polishing. Provide polishing method It can be.

  According to the present invention, after polishing performed using cross wool, final polishing performed to remove minute scratches and buffs remaining on the polished surface (the surface of the object to be polished) after polishing. This eliminates the need to use a resin finish that may have been used during the final polishing using a conventional sponge buff, reducing the time required for the final polishing process, and after finishing polishing. It is possible to provide a polishing machine and a polishing method suitable for realizing a mirror-finished surface in which minute scratches and buffs are hardly left on the finished surface.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.

  In the accompanying drawings, FIG. 1 is a plan view of the polishing disk 1 of the present invention in which the polishing cloth 3 for polishing in contact with the polishing surface (that is, the surface of the object to be polished) is disposed on the upper side. FIG. 1 is a front sectional view of the polishing board 1 shown in FIG. 1, and in this case as well, the polishing cloth 3 side is arranged on the upper side.

  The polishing board 1 is configured by fixing a polishing cloth 3 on one side (upper side in FIG. 2) of the elastic plate 2 and a velvet fastener material 5 on the other side (lower side in FIG. 2) with an adhesive. . The elastic plate 2 is a sponge disk having a thickness of about 1.5 cm and having a trapezoidal cross section as shown in FIG. The outer diameter shown in FIG. 1 (that is, the outer diameter of the upper surface in FIG. 2) is about 17 cm. A through hole 6 having a diameter of about 3 cm is formed at the center of the elastic plate 2.

  The polishing cloth 3 is configured by implanting cotton fibers 8 and 8 having a length of about 4 to 6 mm on a base cloth 4. The base cloth 4 has the same shape as that of the lower bottom side (upper side in FIG. 2) of the elastic plate 2 having a trapezoidal cross section. A through hole 4 a having a diameter of about 3 cm is also formed at the center of the base cloth 4.

  As shown in FIGS. 1 and 2, longitudinal grooves 7a and lateral grooves 7b are formed in a lattice pattern on the surface where the cotton fibers 8 and 8 are implanted, and cotton is formed in a region defined by the longitudinal grooves 7a and the lateral grooves 7b. Fiber groups 9 and 9 are formed (see FIG. 1, in which only the longitudinal grooves 7 a are shown in FIG. 2).

  The widths of the vertical grooves 7a and the horizontal grooves 7b are about 1.5 mm to 3.5 mm, respectively. The distance between the adjacent vertical grooves 7a and 7a and the distance between the adjacent horizontal grooves 7b and 7b is a distance between the centers of the grooves of 5 mm to 8 mm. To the extent.

  The velvet fastener material 5 has the same shape as that of the upper surface side (lower side in FIG. 2) of the elastic plate 2 having a trapezoidal cross section. The velvet fastener material 5 is also formed with a through hole 5 a in accordance with the through hole 6 of the elastic plate 2.

  Next, the use of the polishing machine 1 configured as described above will be described.

  The other velvet fastener material paired with the velvet fastener material 5 of the polishing disk 1 is provided on a rotating disk of a rotary polishing device (not shown), and the both velvet fastener materials are bonded to each other to polish the polishing disk 1. Is mounted on a rotary polishing machine.

  Next, a polishing liquid and / or a compound are attached to the polishing cloth 3, and the polishing disk 1 is rotated through a rotary polishing apparatus, and the polishing cloth 3 is brought into contact with the polishing surface for polishing (cloth polishing).

  Here, the relationship between the longitudinal grooves 7a and lateral grooves 7b formed on the surface of the polishing pad 3 and the rotation direction of the polishing board 1 will be described with reference to FIGS. 4 (a) and 4 (b).

  FIG. 4B is a schematic explanatory view of the polishing pad of the present invention in which the vertical grooves 7a and the horizontal grooves 7b are formed in a lattice shape on the surface of the polishing pad 3, with a part omitted in the plan view shown in FIG. .

  FIG. 4A shows a conventional polishing machine 10 in which only the vertical grooves 15 are formed on the surface of the polishing pad 3 (that is, only the vertical grooves 7a are formed in the polishing machine 1 of the present invention). It is the schematic explanatory drawing which abbreviate | omitted one part in the planar view state. Since the polishing disk 1 of the present invention and the conventional polishing disk 10 have the same configuration except that the lateral grooves 7b formed in the polishing disk 1 of the present invention are not formed, they are common to common parts. The description is omitted with reference numerals.

  In FIG. 4A, arrows 11 and 12 indicate the rotation direction of the polishing disk 10, and in FIG. 4B, arrows 13 and 14 indicate the rotation direction of the polishing disk 1.

  In part A surrounded by an ellipse in FIG. 4A, the vertical groove 15 is substantially parallel to the arrow 11 indicating the rotation direction of the polishing board 10. For this reason, the polishing liquid or compound flows moderately along the longitudinal grooves 15. On the other hand, in the part B surrounded by an ellipse, the vertical groove 15 is substantially perpendicular to the arrow 12 indicating the rotation direction of the polishing board 10. For this reason, it is conceivable that in the portion B, the polishing liquid or compound accumulated in the vertical groove 15 is slightly dragged at the edge of the vertical groove 15 and slightly buffs the polished surface. Thus, in the case of the polishing disk 10 provided with only the vertical grooves 15, the buffs remaining on the polishing surface increase.

  On the other hand, in the polishing disk 1 of the present invention shown in FIG. 4 (b), the vertical groove 7a that is substantially parallel to the arrow 13 indicating the rotation direction of the polishing disk 1 exists in the portion C surrounded by the ellipse. A lateral groove 7b that is substantially parallel to the arrow 14 indicating the rotation direction of the polishing disc 1 is also present in the portion D surrounded by. Accordingly, a groove that is substantially parallel to the rotational direction of the polishing disk 1 is present on the entire surface of the polishing pad 3, and the polishing liquid or compound is moderately distributed along the vertical groove 7 a or the horizontal groove 7 b on the entire surface of the polishing pad 3. Flowing.

  In addition, on the entire surface of the polishing cloth 3, for example, a groove that is substantially parallel to the rotation direction of the polishing machine 1 exists, such as a C part and a D part surrounded by an ellipse, and at the same time, substantially the same as the rotation direction of the polishing machine 1. There will be a right-angled groove. In the conventional polishing plate 10 shown in FIG. 4A, as described above, the polishing liquid or compound is accumulated in the vertical groove 15 that is substantially perpendicular to the rotation direction of the polishing disk 10, and a little at the edge of the vertical groove 15. It is believed that it will drag and slightly buff the polished surface.

  However, in the polishing disk 1 of the present invention shown in FIG. 4B, the grooves are formed in a lattice shape with the vertical grooves 7 a and the horizontal grooves 7 b, and collected in the grooves almost perpendicular to the rotation direction of the polishing disk 1. The liquid and compound for polishing immediately escape to the groove that is almost parallel to the rotation direction of the polishing disk 1. For this reason, it is considered that the liquid or compound for polishing is less likely to be dragged at the edge of the groove.

  Actually, the ground surface of the metal painted surface after sanding or sanding with sandpaper under the same conditions is subjected to cloth polishing using the polishing disk 1 of the present invention shown in FIG. 4 (b). When the polished surface was compared with the polished surface subjected to cloth polishing under the same conditions using the conventional polishing disk 10 shown in FIG. 4A, the polishing disk 1 was used for polishing. It was confirmed that there were fewer buffs left on the polished surface.

  Next, the cotton fiber 8 implanted in the polishing cloth 3 is about 4 to 6 mm in length with respect to the polished surface of the metal-coated surface after water sanding or sanding with sandpaper under the same conditions. A polishing machine (that is, cross wool) similar to the polishing machine 1 of the present invention was prepared except that the wool fiber was changed to the same, and the polishing machine 1 of the present invention (that is, cross cotton) was used under the same conditions. The metal-coated surface was polished, and the polished surfaces after polishing were compared.

  As a result, it was confirmed that the surface polished with the polishing disk 1 of the present invention (that is, cross cotton) had few small scratches and buffs left on the polished surface after polishing, and was small.

(Embodiment of invention of polishing method)
The polishing method of the present invention using the polishing disk 1 of the present invention described above will be described.

(First step)
First, the metal painted surface was water-polished with sandpaper.

  Here, sandpaper having a roughness called 800-2000 was used. The size of the abrasive grains on the paper surface of the second sandpaper is 19 to 10 μm on average. The depth of the abrasive scratches by the abrasive grains is about 1/10 of the size of the abrasive grains of the sandpaper.

  Here, it is also possible to use an air sharpening that does not use water instead of a water sharpening. Also in this case, sandpaper having a roughness called No. 800-2000, in which the average size of abrasive grains on the paper surface of the sandpaper is 19-10 μm, can be used.

(Second step)
In the above-described polishing machine 1 (i.e., cross cotton), the polishing machine (i.e., cross wool) (polishing) in which the cotton fibers 8 implanted in the polishing cloth 3 are changed to wool fibers having a length of 4 to 6 mm. The length of the wool fibers implanted in the cloth 3 is 4 to 6 mm, and the widths of the longitudinal grooves and transverse grooves corresponding to the longitudinal grooves 7a and 7b in the cross cotton shown in FIG. The distance between the adjacent vertical grooves 7a, 7a in the cross cotton, the distance between the adjacent vertical grooves corresponding to the distance between the adjacent horizontal grooves 7b, 7b, and the distance between the adjacent horizontal grooves is about 6 mm in the distance between the centers of the grooves). The polishing surface (i.e., cross wool) was used to hold a fine compound, and the polished surface after the first step was polished.

  Here, a fine compound having a particle size of 10 μm and a hardness of 8 was used.

  In this second step, a polishing disk (i.e., cross wool) was mounted on a rotary polishing apparatus and polished while rotating at 800 to 2000 rpm.

(Third process)
The above-described polishing disk 1 of the present invention (that is, cross cotton) (the length of the cotton fibers 8 implanted in the polishing cloth 3 is 4 to 6 mm, the widths of the longitudinal grooves 7a and the lateral grooves 7b are each about 2.0 mm, Polishing after performing the second step by holding the compound of ultrafine particles in the distance between adjacent vertical grooves 7a, 7a and the distance between adjacent horizontal grooves 7b, 7b (about 6 mm in distance between the centers of the grooves) The surface was polished.

  As the ultrafine particle compound, one having a particle diameter of 1 μm and a hardness of 9 was used.

  The polishing disk 1 (that is, cloth cotton) was mounted on a rotary polishing apparatus, held with the ultrafine particle compound as described above, and polished while rotating at 800 to 2000 rpm.

(Comparison example of polishing method)
After performing the same steps as the first step and the second step in the above-described embodiment, the third step is coarse (density 70 to 90 kg / m ³ , number of cells 30 to 45 / inch ³ ), and from a flexible urethane foam The disc-shaped sponge buff holds the same ultrafine particle compound (particle size 1 μm, hardness 9) as used in the third step of the above-described embodiment, and the polished surface after performing the second step (A disc-shaped sponge buff was attached to a rotary polishing apparatus, and the ultrafine particle compound as described above was held and polished while rotating at 800 to 2000 rpm).

(Comparison)
In the comparative example, the polishing time in the third step was set to be the same as the polishing time in the third step in the example, and the polished surfaces after polishing were compared. No scratches or buffs were observed, and the mirror surface was in a clean state. However, it was recognized that fine scratches and buffs remained on the polished surface in the comparative example.

  In the comparative example, when the polishing time for the third step was made longer than the time for the third step in the example, the polishing time for the third step described above was the same as the time for the third step in the example. The fine scratches and buffs remaining on the polished surface were reduced, but it was still confirmed visually that the fine scratches and buffs remained on the polished surface.

  Subsequently, the resin-like finish was held on the disc-shaped sponge buff and polished while rotating at 800 to 2000 rpm. As a result, the polished surface could not be visually confirmed as having minute scratches or buffs. It was.

  On the visual level, the state of the polished finish surface of the comparative example after using this resin finish was almost the same as the polished surface in the state where the polishing in the third step in the above-described example was completed.

  As a result, according to the present invention, after the cloth polishing performed using the cross wool, in order to remove minute scratches and buffs remaining on the polishing surface (surface of the object to be polished) after the cloth polishing. When finishing polishing to be performed, it is not necessary to use a resin finishing agent that may have been used in finishing polishing using a conventional sponge buff, and it is possible to shorten the time of the finishing polishing process, and It was confirmed that it was possible to provide a polishing machine and a polishing method suitable for realizing a mirror-finished surface in which fine scratches and buffs were hardly left on the finished surface after final polishing.

  The preferred embodiments and examples of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the embodiments and examples, and the technical scope can be understood from the claims. Can be changed to various forms.

The top view showing an example of the surface contact | abutted to the grinding | polishing target object of the grinding | polishing board of this invention. FIG. 2 is a front cross-sectional view showing a surface of the polishing disk shown in FIG. The top view of the surface fixed to the rotary disk by the side of the rotary polishing apparatus of the polishing disk shown in FIG. It is a figure explaining the relationship between the groove | channel formed in polishing cloth, and the rotation direction of a grinding | polishing board, (a) is explanatory drawing of the grinding | polishing board provided only with the conventional vertical groove, (b) is a vertical groove and a horizontal groove. Explanatory drawing of the grinding | polishing disk of this invention provided with the grid | lattice form. The flowchart explaining the process of the grinding | polishing method of the conventional metal coating surface. The flowchart explaining the process of the grinding | polishing method of the metal coating surface of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Polishing board 2 Elastic board 3 Polishing cloth 4 Base cloth 4a Through-hole 5 Velvet fastener material 5a Through-hole 6 Through-hole 7a Vertical groove 7b Horizontal groove 8 Cotton fiber 9 Cotton fiber group 10 Polishing board (conventional thing)

Claims (2)

A polishing disk in which the back side of the polishing cloth is fixed to one surface side of the elastic plate, and a fixing means to the rotating disk on the rotary polishing apparatus side is provided on the other surface side of the elastic plate,
The polishing cloth is configured by implanting cotton fibers on the surface side of a base cloth, and longitudinal grooves and lateral grooves are formed in a lattice shape in a surface where the cotton fibers are implanted. To grind. A first step of water-polishing or air-polishing a metal-coated surface with sandpaper;
A polishing disk having a back surface side of an abrasive cloth fixed to one surface side of an elastic plate, and a fixing means to a rotating disk on a rotary polishing apparatus side provided on the other surface side of the elastic plate, the polishing cloth being a base A fine compound is held in a polishing machine which is constructed by implanting wool fibers on the surface side of the cloth and in which longitudinal grooves and lateral grooves are formed in a lattice shape in the surface where the wool fibers are implanted. A second step of polishing the polished surface after the first step;
A polishing disk having a back surface side of an abrasive cloth fixed to one surface side of an elastic plate, and a fixing means to a rotating disk on a rotary polishing apparatus side provided on the other surface side of the elastic plate, the polishing cloth being a base A compound of ultrafine particles is held in a polishing machine that is constructed by implanting cotton fibers on the surface side of the cloth and in which longitudinal grooves and lateral grooves are formed in a lattice pattern in the surface where the cotton fibers are implanted. And a third step of polishing the polished surface after the second step. A method for polishing a metal-coated surface.

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