JP2007021589A - Grinding method and grinding member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grinding method for grinding a workpiece in a short period with high accuracy and without increasing steps, and to provide a grinding member. <P>SOLUTION: According to the grinding method for grinding a ground surface 1a of a workpiece 1 by a grinding member 2 on which a grinding material layer 3 is formed, the grinding material layer 3 is formed of grinding grains 4 having a relatively large grain size, grinding grains 7 having a relatively small grain size, and retaining members 5 for retaining the grinding grains of the large and small grain sizes. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a polishing method and a polishing member for polishing a surface to be polished of a member to be polished with a polishing member coated with a layer of an abrasive.

  Conventionally, in gears used in various mechanical devices, in order to improve the power transmission efficiency, for example, it is a problem to improve the surface properties of the tooth surfaces by reducing the friction coefficient of the tooth surfaces of the gears, for example. . For this reason, when gears are manufactured, the tooth surface portion is subjected to gear cutting, shaving, predetermined heat treatment, etc., and then, for example, finishing to remove the distortion caused by the heat treatment and improve the tooth surface accuracy. As processing, polishing of the tooth surface such as honing and lapping may be performed. Patent Document 1 discloses an invention related to a grinding wheel dressing tool (so-called dress gear) for conspicuous (dressing or truing) a grinding wheel for polishing (gear honing) of a tooth surface in relation to the finishing of the tooth surface. Has been.

According to the grinding wheel dressing tool and the manufacturing method thereof described in Patent Document 1, an abrasive grain (Al ₂ O ₃ abrasive grain or SiC abrasive grain) layer having a lower hardness than a CBN (cubic boron nitride) abrasive grain layer After the CBN abrasive grain layer is formed on a required portion of the dress gear surface for dressing the polishing grindstone having the above-mentioned CBN, the above-mentioned CBN The abrasive layer is corrected. Therefore, it is said that high-precision correction can be performed in a shorter time compared to the case where correction is performed with a combination of abrasive layers having the same hardness.

  Patent Document 2 discloses a hard coating that can reduce the friction coefficient and improve the wear resistance in lubricating oil while maintaining the characteristics of high wear resistance, high seizure resistance, and low opponent attack. And a covering member thereof, a diamond-like carbon (DLC) first layer in which Cr is compounded in particles, and a second layer in which a compound of N and Ti is compounded in particles in DLC And a coating member having a laminated structure and a covering member are described.

  Patent Document 3 discloses a method for arbitrarily selecting a material for an element substrate, and as a method for quickly separating the element substrate, the element substrate is mechanically rough-polished or coarsely ground, A method of manufacturing a thin film magnetic head is described in which a magnetic head is formed by precision polishing or grinding the remainder of a substrate.

  Furthermore, Patent Document 4 discloses that a desired film is formed between gear teeth meshing with each other by forming a coating made of a mixture of a binder and an additive on a tooth surface of a gear and removed by wear during operation. A method for setting backlash is described.

Patent Document 5 describes a dental occlusion adjusting material obtained by kneading diamond powder particles or lapping abrasive grains of various ceramics to a viscoelastic resin base material.
JP-A-9-201721 JP 2001-192864 A JP-A-4-298806 Japanese translation of PCT publication No. 2004-515732 JP-A-1-97448

  By the way, the invention described in the above-mentioned Patent Document 1 relates to a tool (dress gear) for dressing a grinding wheel for polishing a tooth surface of a gear (work) to be manufactured, and a method for manufacturing the tool, and polishing the tooth surface. Although it is said that polishing as a correction process for a grinding wheel and dress gear can be performed in a short time and with high accuracy, there is no specific description regarding a method for improving the polishing process of the tooth surface of the gear. That is, it is said that the tooth surface can be polished with high accuracy by making it possible to correct the dress gear for dressing the grinding wheel for polishing the tooth surface in a short time and with high accuracy. In addition to this, no specific consideration is given to a technique for improving the polishing of the tooth surface.

  In addition, as a method of polishing the tooth surface, an abrasive or a polishing member in which abrasive grains are dispersed is interposed between a gear tooth surface (work) and a tool (lap), and the teeth are rubbed together. Lapping for polishing the surface is also known. When polishing the tooth surface by this lapping, for example, first, rough polishing is performed using abrasive grains having a relatively large particle diameter, and then abrasive grains having a relatively small particle diameter are used as final polishing. By using the lapping, the time required for polishing can be shortened, and high-precision polishing can be performed. However, in this case, at least two processes of rough polishing and finish polishing must be performed, and there is a problem in performing polishing in a shorter time.

  As described above, in the conventional tooth surface polishing technology, the tooth surface polishing process for improving the tooth surface properties for the purpose of improving the power transmission efficiency of the gear can be performed in a shorter time and with higher accuracy. There was still room for improvement in order to do this.

  This invention was made paying attention to said technical subject, and it aims at providing the grinding | polishing method and grinding | polishing member which can grind | polish with high precision in a short time, without increasing a process. Is.

  In order to achieve the above object, the invention according to claim 1 is a polishing method for polishing a surface to be polished of a member to be polished by a polishing member on which a layer of abrasive is formed. A polishing method comprising: a polishing particle having a large particle size; a polishing particle having a relatively small particle size; and a holding member that holds the large and small polishing particles. is there.

  According to a second aspect of the present invention, in the first aspect of the invention, the abrasive layer is relatively smaller than the first polishing layer in which abrasive grains having a relatively large particle size are mixed. A second polishing layer in which abrasive grains having a particle size are mixed, and the first polishing layer is provided at a position in contact with the surface to be polished when the polishing is started. The polishing method is characterized in that the second polishing layer is provided between the polishing layer and the polishing member.

  Further, the invention of claim 3 is the invention of claim 1 or 2, wherein the polishing member is any one of a plurality of machine elements operating in contact with each other, and the material to be polished is A polishing method characterized by being another mechanical element of the plurality of mechanical elements.

  Furthermore, the invention of claim 4 is the invention according to any one of claims 1 to 3, wherein the polishing member is one of two gears meshing with each other, and the member to be polished is the second gear. The polishing method is characterized in that it is the other gear of the two gears.

  According to a fifth aspect of the invention, in the invention of the fourth aspect, the polishing member is a gear having a relatively large number of teeth of two gears meshing with each other, and the member to be polished is meshed with each other. The polishing method is characterized in that it is a gear having a relatively small number of teeth among the two gears.

  On the other hand, the invention of claim 6 is a polishing member in which an abrasive layer for polishing a surface to be polished of the member to be polished is formed, wherein the abrasive layer includes abrasive grains having a relatively large particle size. A polishing member characterized in that it is formed of a relatively small abrasive grain and a holding member that holds the large and small abrasive grains.

  According to a seventh aspect of the invention, in the sixth aspect of the invention, the abrasive layer is relatively small with respect to the first polishing layer in which relatively large abrasive grains are mixed. A second polishing layer in which abrasive grains having a particle size are mixed, wherein the first polishing layer is provided at a position in contact with the surface to be polished, and the first polishing layer and the polishing member The second polishing layer is provided between the two and the polishing member.

  Furthermore, the invention of claim 8 is the polishing according to claim 6 or 7, wherein the polishing member is any one of a plurality of machine elements operating in contact with each other. It is a member.

  Furthermore, the invention of claim 9 is the polishing member according to any one of claims 6 to 8, wherein the polishing member is one of two gears meshing with each other. .

  A tenth aspect of the present invention is the polishing member according to the ninth aspect, wherein the polishing member is a gear having a relatively large number of teeth among two gears meshing with each other.

  According to the first aspect of the present invention, the abrasive grains having a relatively large particle diameter and the abrasive grains having a relatively small particle diameter are held by the holding member to form the abrasive layer, and the polishing is performed. The surface to be polished of the member to be polished is polished by the polishing member having the material layer formed on the surface, so that the surface to be polished can be polished in a short time with abrasive grains having a relatively large particle size. The surface to be polished can be polished with high accuracy by the abrasive grains having a relatively small particle diameter. In addition, since a layer of abrasive material having abrasive grains having a large and small particle size is formed on the polishing member, it is not necessary to divide the polishing process into multiple times, and the surface to be polished can be polished in a shorter time. Can do.

  According to the invention of claim 2, the surface to be polished is first polished by the first polishing layer in which abrasive grains having a relatively large particle size are mixed, and the first polishing layer is As the surface is worn away by polishing, the surface to be polished is continuously polished by the second polishing layer in which abrasive grains having a relatively small particle diameter are mixed. Therefore, the surface to be polished can be polished in a shorter time and with higher accuracy without dividing the polishing step into a plurality of times.

  Further, according to the invention of claim 3, any one of the plurality of mechanical elements operating in contact with each other serves as an abrasive member, and an abrasive layer is formed on the surface thereof. Then, the other mechanical element becomes the member to be polished, and the surface thereof becomes the surface to be polished and is in contact with the abrasive layer. Therefore, without providing a separate polishing step, the abrasive layer and the surface to be polished are rubbed together by operating these mechanical elements, and as a result, the surface to be polished can be polished in a short time and with high accuracy. Can do.

  Furthermore, according to the invention of claim 4, one of the two gears meshing with each other serves as an abrasive member, and an abrasive layer is formed on the tooth surface of the gear. Then, the other gear is a member to be polished, the tooth surface of the gear is a surface to be polished, and the two gears are in contact with the tooth surface of the gear as the polishing member on which the abrasive layer is formed. Are engaged. For this reason, the polishing material layer and the surface to be polished are rubbed together by driving the two gears as the polishing member and the member to be polished in mesh with each other without providing a separate polishing step. The tooth surface of the gear as the surface can be polished in a short time and with high accuracy.

  According to the fifth aspect of the present invention, the gear having the larger number of teeth among the two gears meshing with each other serves as an abrasive member, and an abrasive layer is formed on the tooth surface of the gear. The gear with the smaller number of teeth becomes the member to be polished, and the tooth surface of the gear becomes the surface to be polished, and comes into contact with the tooth surface of the gear as the polishing member on which the abrasive layer is formed. So that these two gears are meshed. Therefore, without providing a separate polishing step, the abrasive member and the surface to be polished are rubbed together by driving the polishing member and the two gears as the surface to be polished in mesh with each other. The surface can be polished in a short time and with high accuracy. Further, since the abrasive layer is formed on the tooth surface of the gear having the relatively large number of teeth, the surface to be polished on the polishing member side is compared with the total contact area with the polishing member on the surface to be polished. The total contact area with the surface can be increased. For example, even when the thickness of the abrasive layer is limited, the surface to be polished can be effectively polished.

  On the other hand, according to the invention of claim 6, the abrasive layer in which the abrasive grains having a relatively large particle diameter and the abrasive grains having a relatively small particle diameter are held by the holding member is The surface to be polished of the member is formed on the surface of the polishing member for polishing. Therefore, it is possible to polish the surface to be polished in a short time with polishing grains having a relatively large particle diameter, and to polish the surface to be polished with high precision using polishing grains having a relatively small particle diameter. be able to. In addition, since a layer of abrasive material having abrasive grains with a large and small particle size is formed on the polishing member, when polishing the surface to be polished by the polishing member, there is no need to divide the polishing step into multiple times, The surface to be polished can be polished in a shorter time.

  According to the seventh aspect of the present invention, the second polishing layer in which abrasive grains having a relatively small particle size are mixed is provided on the surface of the base material that is the basis of the polishing member. The first and second polishing layers are provided on the surface of the polishing member by providing the first polishing layer in which polishing grains having a relatively large particle size are mixed on the surface of the second polishing layer. A layer of abrasive having Therefore, when the surface to be polished is polished by the polishing member, the surface to be polished is first polished in a short time by the first polishing layer in which abrasive grains having a relatively large particle size are mixed. As the first polishing layer is worn away by polishing, the surface to be polished can be made with high accuracy by the second polishing layer in which abrasive grains having a relatively small particle size are continuously mixed. Can be polished. Further, since it is not necessary to divide the polishing process into a plurality of times, the surface to be polished can be polished in a shorter time and with higher accuracy.

  According to the eighth aspect of the present invention, one of the plurality of mechanical elements operating in contact with each other serves as an abrasive member, and an abrasive layer is formed on the surface thereof. Then, the other mechanical element becomes the member to be polished, and the surface thereof becomes the surface to be polished and is in contact with the abrasive layer. Therefore, without providing a separate polishing step, the abrasive layer and the surface to be polished are rubbed together by operating a plurality of mechanical elements, and as a result, the surface to be polished can be polished in a short time and with high accuracy. it can.

  Furthermore, according to the invention of claim 9, one of the two gears meshing with each other serves as an abrasive member, and an abrasive layer is formed on the tooth surface of the gear. Then, the other gear whose tooth surface is the surface to be polished as the member to be polished and the gear as the polishing member on which the abrasive layer is formed mesh with each other. For this reason, the polishing material layer and the surface to be polished are rubbed together by driving the two gears as the polishing member and the member to be polished in mesh with each other without providing a separate polishing step. The tooth surface of the gear as the surface can be polished in a short time and with high accuracy.

  According to the invention of claim 10, of the two gears meshing with each other, the gear having the relatively large number of teeth serves as an abrasive member, and an abrasive layer is formed on the tooth surface of the gear. The gear with the smaller number of teeth becomes the member to be polished, and the tooth surface of the gear becomes the surface to be polished, and comes into contact with the tooth surface of the gear as the polishing member on which the abrasive layer is formed. So that these two gears are meshed. Therefore, without providing a separate polishing step, the abrasive member and the surface to be polished are rubbed together by driving the polishing member and the two gears as the surface to be polished in mesh with each other. The surface can be polished in a short time and with high accuracy. Further, since the abrasive layer is formed on the tooth surface of the gear having the relatively large number of teeth, the surface to be polished on the polishing member side is compared with the total contact area with the polishing member on the surface to be polished. The total contact area with the surface can be increased. For example, even when the thickness of the abrasive layer is limited, the surface to be polished can be effectively polished.

  Next, the present invention will be described based on specific examples. As described above, in order to improve the power transmission efficiency of the gear, it is necessary to improve the surface property of the tooth surface, particularly to reduce the friction coefficient of the tooth surface. That is, in order to reduce the friction coefficient of the tooth surface, for example, it is necessary to make the surface roughness of the tooth surface fine (small). In order to reduce the surface roughness of the tooth surface, for example, it is necessary to perform a polishing process that removes deformation inevitably caused by heat treatment or distortion of the tooth surface, and this polishing process is performed in a short time with high accuracy. Conventionally, it has been an issue to be done.

  Therefore, the present invention is configured such that the polishing process is performed in a short time with high accuracy by using the following polishing method and polishing member. FIG. 1 is a diagram for explaining an example in which the present invention is applied to grinding of a tooth surface of a gear. FIG. 1 (A) is a spur gear, and FIG. 1 (B) is a helical gear. An applied example is shown. The gear pair shown in FIG. 1 is composed of two gears that mesh with a gear (small gear) 1 having a relatively small number of teeth and a gear (large gear) 2 having a relatively large number of teeth. ing.

  Of these large and small gears 1 and 2, the small gear 1 is a gear in a state after a predetermined process such as cutting, shaving, or heat treatment is performed, and the tooth surface after the heat treatment is polished. It is a gear in a state before being performed. Therefore, the small gear 1 is a member (work) 1 to be polished, and the tooth surface of the small gear 1 is a surface to be polished 1a. On the other hand, the large gear 2 is a gear in a state after being subjected to predetermined processing such as cutting, shaving, heat treatment or the like, or after being subjected to predetermined grinding or polishing, The large gear 2 in such a state serves as a base material, and abrasive grains having a relatively large particle diameter and a relatively small particle diameter polished respectively held by a holding member (binder) on a tooth surface portion thereof. Abrasive material layer 3 having abrasive grains for forming is formed.

  The small gear 1 and the large gear 2 are meshed with each other. That is, at the meshing portion between the small gear 1 and the large gear 2, the polished surface 1a and the abrasive layer 3 are brought into contact with each other. Therefore, when the small gear 1 and the large gear 2 are driven, the polished surface 1a and the abrasive layer 3 are rubbed against each other, and the polished surface 1a can be polished. Therefore, the large gear 2 is a polishing member 2 for polishing the surface 1a to be polished of the member 1 to be polished.

  The abrasive layer 3 formed on the abrasive member 2 will be specifically described with reference to FIG. An abrasive layer 3 is formed on a large gear (abrasive member) 2 using a tooth surface portion 2a of the large gear 2 as a base material. The abrasive layer 3 includes a first abrasive layer 6 in which abrasive grains 4 having a relatively large particle diameter are mixed and held by a binder 5, and abrasive grains 7 having a relatively small particle diameter. Is mixed with the second polishing layer 8 held by the binder 5.

  That is, the second polishing layer 8 is formed on the surface of the tooth surface portion 2 a of the large gear 2, and the first polishing layer 6 is formed on the surface of the second polishing layer 8. The surface of the first polishing layer 6 is in contact with the surface to be polished 1 a of the small gear 1 at the meshing portion between the small gear 1 and the large gear 2. In other words, when the small gear 1 and the large gear 2 are engaged with each other, that is, when the polishing of the surface 1a to be polished is started by the polishing member 2, the first polishing layer 6 is in a position in contact with the surface 1a to be polished. The abrasive layer 3 is formed by providing the second polishing layer 8 between the first polishing layer 6 and the polishing member 2 (tooth surface portion 2a).

  Here, the abrasive grains 4 and 7 and the binder 5 will be specifically described. The abrasive grains 4 and 7 are made of, for example, silicon carbide (SiC), and the abrasive grains 4 are as follows. As the abrasive grains 7 having a particle diameter of about 10 μm, abrasive grains having a particle diameter of about 1 μm are used. The grain size of the abrasive grains 4 is such that the desired polishing amount or polishing rate when the surface 1a to be polished is polished by the first polishing layer 6 or the polishing abrasive grains 4 are the first polishing layer when polishing. The particle size can be made a relatively large particle size in consideration of, for example, the degree of influence when it drops off from 6 and is mixed in the lubricating oil of the gear device. The particle size of about 10 μm is appropriately set as the maximum particle size that does not cause abnormal wear or the like in each part of the bearing or gear, for example, when the abrasive grains 4 are dropped and mixed in the lubricating oil. Yes.

  Further, the grain size of the abrasive grains 7 is such that the desired surface properties of the surface 1a to be polished when the second polishing layer 8 polishes the surface 1a to be polished, specifically the surface of the desired surface 1a to be polished. In consideration of roughness and the like, the particle size can be set to a relatively small arbitrary particle size. The particle size of about 1 μm is an appropriate particle size as an abrasive when the surface roughness of the desired surface 1a after polishing is, for example, 0.1 μm in terms of arithmetic average roughness (Ra). It is set appropriately.

The material of the polishing abrasive grains 4 and 7 can be appropriately selected in consideration of the hardness of the appropriate abrasive grains or the shape of the abrasive grains during polishing. For example, diamond or alumina (Al ₂ O ₃ ) can be used as the abrasive material other than SiC shown above. The materials of the polishing abrasive grains 4 and 7 can be the same material, or different materials can be combined.

  As the binder 5, for example, a thermosetting resin such as polyamideimide (PAI) is used. In this case, as a method of generating the first polishing layer 6 and the second polishing layer 8 using the binder 5, the binder 5 in which the abrasive grains 4 and 7 are mixed is used by a method such as spray coating. Each is applied to the surface of the polishing member 2 or the second polishing layer 8 and then polished by curing the thermosetting resin in an atmosphere of high temperature (about 180 to 200 ° C. when using PAI). A layer is produced (fired).

  A method of polishing the surface 1a to be polished by the polishing member 2 configured as described above will be briefly described. A polishing member (large gear) 2 having an abrasive layer 3 having a first polishing layer 6 and a second polishing layer 8, and a member to be polished (small gear) having a surface to be polished (tooth surface) 1a. 1 are installed in mesh with each other as shown in FIG. Then, these two meshing gears are driven. In this case, the driving gear may be either the small gear 1 or the large gear 2. A predetermined load is applied to the driven gear. This predetermined load can be appropriately set to an arbitrary size in consideration of a desired polishing amount or polishing rate, or the Ra value of the surface 1a to be polished, when the surface 1a to be polished is polished.

  When the gear pair by the small gear 1 and the large gear 2 is driven, first, the first polishing layer 6 and the surface to be polished 1a come into contact with each other at the meshing portion, and the contact occurs as the gear pair rotates. The part slides, that is, the first polishing layer 6 and the surface to be polished 1 a are rubbed with each other, and the surface to be polished 1 a is polished by the first polishing layer 6. Then, when the polishing proceeds in that state, the first polishing layer 6 is gradually worn away, and the second polishing layer 8 and the surface to be polished 1a come into contact with each other. As the gear pair rotates, the contact portions slide, that is, the second polishing layer 8 and the surface to be polished 1a are rubbed against each other, and the surface to be polished 1a is polished by the second polishing layer 8. The The gear pair is driven for a predetermined time set to obtain a predetermined surface property on the surface to be polished 1a. After the polishing, for example, the lubricating oil is changed to remove abrasive grains and polishing soot that are dropped during the polishing, and the gear pair is washed, so-called flushing is performed, and a series of polishing processes is completed.

  As described above, according to the polishing method and the polishing member according to the present invention, the polishing abrasive grains 4 having a relatively large particle diameter and the polishing abrasive grains 7 having a relatively small particle diameter are held members (binders). 5, the abrasive layer 3 is formed, and the polished surface of the member to be polished (small gear) 1 (the teeth of the small gear 1) is formed by the polishing member (large gear) 2 on which the abrasive layer 3 is formed. By polishing the surface 1a, the surface 1a to be polished can be polished in a short time by the abrasive grains 4 having a relatively large particle diameter, and by the abrasive grains 7 having a relatively small particle diameter. The surface to be polished can be polished with high accuracy.

  These relatively large particle size abrasive grains 4 and relatively small particle size abrasive grains 7 can also be held in a mixed state in the abrasive layer 3, respectively. As in the above specific example, the first polishing layer 6 in which the abrasive grains 4 having a relatively large particle diameter are mixed, and the first polishing layer 6 in which the relatively small abrasive grains 7 are mixed. It can be respectively held in the abrasive layer 3 in a state of being divided into two layers with two polishing layers 8. In that case, first, the surface 1a to be polished is polished by the first polishing layer 6 in which the abrasive grains 4 having a relatively large particle diameter are mixed, and the first polishing layer 6 is worn by polishing. Accordingly, the surface to be polished 1a is polished by the second polishing layer 8 in which the abrasive grains 7 having a relatively small particle diameter are mixed. Therefore, it is not necessary to divide the polishing process into a plurality of times, and the surface 1a to be polished can be polished in a shorter time and with higher accuracy.

  Of the two gears 1 and 2 meshing with each other, one gear is used as the member to be polished 1, the tooth surface of the gear is used as the polishing surface 1 a, and the other gear is used as the polishing member 2. By forming the abrasive layer 3 having the first polishing layer 6 and the second polishing layer 8, the two gears 1 as the member to be polished 1 and the polishing member 2 can be provided without providing a separate polishing step. By driving 2 in an engaged state, the abrasive layer 3 and the surface 1a to be polished are rubbed together, and as a result, the surface 1a to be polished can be polished in a short time with high accuracy.

  Further, of the two gears 1 and 2 meshing with each other, the gear (large gear) 2 having a relatively large number of teeth is used as the polishing member 2, and the first polishing layer 6 and the first polishing layer 6 are formed on the tooth surface portion 2a. By forming the abrasive layer 3 having two polishing layers 8, the total contact area with the polishing surface 1a on the polishing member 2 side with respect to the total contact area with the polishing member 2 on the polishing surface 1a side For example, even if the thickness of the abrasive layer 3 is limited, the surface 1a to be polished can be effectively polished.

  In the above specific example, the polishing method and the polishing member according to the present invention are applied to a gear device. However, in addition to the gear device, for example, a pulley and a transmission belt in a belt transmission device, or a chain transmission Applies to multiple mechanical elements that operate in contact with each other, such as chains and sprockets in a device, or plain bearings and shafts in rolling bearings, or rolling elements and inner and outer rings in a rolling bearing, or devices having such mechanical elements be able to. In that case, similarly to the specific example described above, the polishing material layer and the surface to be polished are rubbed together by operating a plurality of mechanical elements without providing a polishing step separately. And can be polished with high accuracy.

  Further, if the polishing method and the polishing member according to the present invention having the above-described actions and effects are applied to a gear mechanism in a power transmission device of a vehicle such as a transmission, for example, the tooth surface of each gear in the gear mechanism By improving the properties, that is, by polishing the tooth surfaces with high accuracy and reducing the friction coefficient, the power transmission efficiency in the gear mechanism is improved, and thus the power transmission efficiency of the vehicle is improved, and the fuel efficiency is improved. be able to.

It is a schematic diagram which illustrates roughly the example of the grinding | polishing method and grinding | polishing member which concern on this invention. It is a schematic diagram explaining the example of the grinding | polishing method and grinding | polishing member which concern on this invention in detail.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... To-be-polished member (work | work, small gear), 1a ... To-be-polished surface, 2 ... Polishing member (large gear), 2a ... Tooth surface part, 3 ... Abrasive material layer, 4, 7 ... Abrasive grain for polishing, 5 ... Holding member (binder), 6 ... first polishing layer, 8 ... second polishing layer.

Claims (10)

In a polishing method for polishing a surface to be polished of a member to be polished by a polishing member on which a layer of abrasive is formed,
The abrasive layer is formed of a relatively large abrasive grain, a relatively small abrasive grain, and a holding member that holds the large and small abrasive grains. A polishing method characterized by comprising:   The abrasive layer includes a first polishing layer in which abrasive grains having a relatively large particle size are mixed, and a second polishing layer in which abrasive grains having a relatively small particle diameter are mixed. And when the polishing is started, the first polishing layer is provided at a position in contact with the surface to be polished, and the second polishing is provided between the first polishing layer and the polishing member. The polishing method according to claim 1, wherein a layer is provided.   The polishing member is any one of a plurality of machine elements operating in contact with each other, and the material to be polished is another machine element of the plurality of machine elements. The polishing method according to claim 1 or 2.   4. The polishing member according to claim 1, wherein the polishing member is one of two gears meshing with each other, and the member to be polished is the other gear of the two gears. The polishing method according to 1. The polishing member is a gear having a relatively large number of teeth out of two gears meshing with each other,
5. The polishing method according to claim 4, wherein the member to be polished is a gear having a relatively small number of teeth among two gears meshing with each other. In the polishing member in which the layer of the polishing material for polishing the surface to be polished of the member to be polished is formed,
The abrasive layer is formed of a relatively large abrasive grain, a relatively small abrasive grain, and a holding member that holds the large and small abrasive grains. A polishing member characterized by comprising:   The abrasive layer includes a first polishing layer in which abrasive grains having a relatively large particle size are mixed, and a second polishing layer in which abrasive grains having a relatively small particle diameter are mixed. A first polishing layer is provided at a position in contact with the surface to be polished, and the second polishing layer is provided between the first polishing layer and the polishing member. The polishing member according to claim 6.   The polishing member according to claim 6 or 7, wherein the polishing member is any one of a plurality of mechanical elements operating in contact with each other.   The polishing member according to claim 6, wherein the polishing member is one of two gears that mesh with each other.   The polishing member according to claim 9, wherein the polishing member is a gear having a relatively large number of teeth among two gears meshing with each other.

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