JP2004330401A - Super abrasive grain wheel and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a super abrasive grain wheel which is easy in fabrication and excellent in sharpness and service life, and also to provide a method for manufacturing it. <P>SOLUTION: Since a grinding section having an end face partitioned into three minute tip faces is provided to each of a plurality of grinding stone members 16, a grinding face partitioned into a number of which the number of fixings is multiplied by the number of partitions is provided in the super adhesive grain wheel 10. For this reason, the number of the partitions of the grinding face is increased while keeping the number of the grinding stone members 16 adhering to a base metal 12 relatively small. Thus, the super adhesive grain wheel 10 which is easy in fabrication and excellent in sharpness and service life is obtained. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a superabrasive wheel in which a plurality of grindstone portions in which a number of superabrasive grains are bonded by a binder are fixed to a base metal, and a method of manufacturing the same.
[0002]
[Prior art]
For example, for grinding a wafer made of a difficult-to-cut material such as quartz, sapphire, silicon carbide, etc., a super-abrasive such as a diamond abrasive or a CBN abrasive is used for a vitrified bond (glassy binder) or a metal bond (metallic). Attempts have been made to use superabrasive wheels bonded with a binder. However, a superabrasive wheel using a vitrified bond has excellent sharpness, but has a disadvantage that the life of the wheel is short due to insufficient abrasive holding power due to the presence of pores. On the other hand, a superabrasive wheel using a metal bond has an excellent abrasive grain holding power, but has a drawback of poor persistence of sharpness due to poor changeability.
[0003]
On the other hand, a so-called chip in which a number of superabrasive grains are bonded by electroforming is produced, and a plurality of chips are fixed to the annular end face of the base metal having a bottomed cylindrical shape with a gap provided between them. A cup-type wheel has been proposed (for example, see Patent Document 1). According to such a cup-type wheel, the unit of the contact area between the ground surface to which the abrasive grains are fixed and the surface to be ground is reduced, so that clogging is hardly generated and high sharpness is obtained, and the holding power of the abrasive grains is reduced. Therefore, there is an advantage that a long life can be obtained. Moreover, since the miniaturization of the contact unit area is performed by providing a gap between the chips, the slit is formed after the abrasive layer is provided with a uniform thickness on the entire annular end face of the base metal. There is also an advantage that it can be manufactured easily and inexpensively as compared with the case where processing is performed. Therefore, such a cup-type wheel is, for example, in addition to the above-mentioned wafer grinding processing of hard-to-cut materials, hard brittle materials such as silicon, compound semiconductor, glass, ceramics, ferrite, quartz, quartz, and cemented carbide. It is also suitably used for grinding.
[0004]
[Patent Document 1]
JP 2001-62736 A
[0005]
[Problems to be solved by the invention]
However, in the cup-shaped wheel described in Patent Document 1, in order to further reduce the unit area of contact between the ground surface and the surface to be ground, each of the chips fixed to the annular end surface is significantly reduced, and the number of fixed chips is reduced. Needs to be significantly increased. For example, when chips having a length of about 2 (mm) are provided at intervals of about 1 (mm) on a base having an outer diameter of 200 (mm), as many as 200 chips are required. Therefore, in order to manufacture a cup-shaped wheel with higher sharpness, each of the chips becomes smaller and the number of chips increases, so that the manufacturing process becomes extremely complicated, and the manufacturing cost increases. Was. In addition, since the individual chips become extremely small, the adhesive area to the base metal becomes extremely small, so that the adhesive strength becomes insufficient, or there is a disadvantage that the handling by human hands becomes extremely difficult.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a superabrasive wheel which is easy to manufacture, has excellent sharpness and a long service life, and a method for manufacturing the same.
[0007]
[First means for solving the problem]
In order to achieve the above object, the gist of the first invention is that a plurality of grindstone members in which a number of superabrasive grains are bonded by a binder are fixed at predetermined positions on a surface of a base metal, and the plurality of grindstones are provided. A superabrasive wheel in which a grinding surface is formed by an end surface located on a predetermined surface of a member, wherein each of the plurality of grinding stone members is provided at one end thereof and is fixed to the base metal. And a grinding portion provided on the other end side and divided into a plurality of minute surfaces which are separated from each other and constitute the grinding surface.
[0008]
[Effect of the first invention]
According to this configuration, since the grinding portion having the end surface divided into the plurality of minute surfaces is provided on each of the plurality of grindstone members, the superabrasive wheel is obtained by multiplying the fixed number by the number of divisions. A number of ground surfaces are provided. For this reason, the number of divisions of the grinding surface can be increased according to the number of divisions of the minute surface while keeping the number of grinding stone members fixed to the base metal relatively small, so that the super-abrasive which is easy to manufacture and has excellent sharpness and service life. A grain wheel is obtained.
[0009]
Other aspects of the invention
Here, preferably, the binder is a nickel alloy. In this way, the nickel alloy can be easily formed by plating, and is excellent in corrosion resistance, and a high hardness can be obtained. Therefore, particularly as a constituent material of the grindstone member constituting the superabrasive wheel, It is suitable.
[0010]
Preferably, each of the plurality of minute surfaces is 0.01 to 1 (mm). ² ). According to the present invention, while keeping the size of the grindstone member sufficiently large, the minute surface constituting the ground surface is made extremely small, so that the unit of the contact area between the ground surface and the ground surface can be made extremely small, By arranging the minute surface to have the minute area as described above, it is possible to obtain a super-abrasive wheel having extremely high sharpness while maintaining good handleability and workability, high adhesive strength of the grindstone member, and the like. More preferably, the area of each of the micro-surfaces is 0.05 (mm ² ) Is preferable, and 0.8 (mm ² The following are preferred. More preferably, the lower limit is 0.08 (mm ² ) Or more, and the upper limit is 0.7 (mm ² )
[0011]
Preferably, the grinding wheel member is fixed in a state where a part of the fixing portion on the grinding portion side is exposed on the surface of the base metal. In this way, when the grindstone member is worn until the grinding portion disappears, the area of the tip surface of the grindstone member increases, so that the service life of the superabrasive wheel can be easily known. For example, it is possible to determine the life when the grinding resistance increases due to an increase in the area of the tip surface during the grinding process, or to determine the life by visual inspection of the tip surface at an appropriate time. is there.
[0012]
Also, preferably, the whole of the whetstone member is formed in a thin plate shape having a uniform thickness dimension, and the grinding portion is formed of a plurality of mutually parallel belt-like portions, and the fine surface is formed at the tip of the belt-like portion. It is provided with. In this way, even if the plurality of strips are gradually worn from their tips, the minute end faces are maintained independent of each other until they are worn down to the base end. For this reason, a superabrasive wheel with even more excellent service life can be obtained. In addition, since it is a thin plate, the processing pressure at the grinding point can be set relatively high, so that it is possible to easily grind hard workpieces such as ceramics, which are hard to penetrate abrasive grains, and at the center of a large ground surface. There is an advantage that the sharpness is further enhanced because there is almost no portion that causes the clogging because there is little contribution to the grinding process.
[0013]
Further, preferably, the whole grindstone member is formed in a thin plate shape having a uniform thickness dimension, and the grinding portion includes a plurality of pieces penetrating in a thickness direction between a boundary with the fixing portion and the end face. It has a through hole. With this configuration, when the grinding portion is gradually worn from the end surface to expose the through hole to the end surface, the end surface is divided into a plurality of minute surfaces by the through hole. For this reason, a superabrasive wheel with even more excellent service life can be obtained. In addition, since it is a thin plate, the processing pressure at the grinding point can be set relatively high, so that it is possible to easily grind hard workpieces such as ceramics, which are hard to penetrate abrasive grains, and at the center of a large ground surface. There is an advantage that the sharpness is further enhanced because there is almost no portion that causes the clogging because there is little contribution to the grinding process.
[0014]
[Second means for solving the problem]
Further, the gist of the second invention for achieving the above object is that a plurality of grindstone members in which a large number of superabrasive grains are bonded by a binder are fixed at predetermined positions on the surface of the base metal and the plurality of grindstone members are fixed. A method for manufacturing a superabrasive wheel in which a grinding surface is formed by an end surface located on a predetermined one surface of a grindstone member, comprising: (a) a plurality of abrasion wheels having a fixed portion having a predetermined shape on one end side and separated from each other; A whetstone member manufacturing process for manufacturing a plurality of thin plate-shaped whetstone members having a grinding portion having the end surface divided into minute surfaces on the other end side; and (b) the plurality of whetstone members having one end surface. Fixing to the surface of the base metal at the fixing portion so as to be positioned above.
[0015]
[Effect of the second invention]
With this configuration, in the grinding wheel member manufacturing process, a plurality of grinding wheel members each having a fixed portion and a grinding portion having a plurality of minute surfaces are manufactured, while in the bonding process, the fixed portion is formed on the base metal surface. The super-abrasive wheel is manufactured by being fixed to the surface. Therefore, the super-abrasive grain wheel has a fixed portion for fixing to the base metal and a grinding wheel member having a ground portion divided into a plurality of minute surfaces whose end surfaces for forming a ground surface are separated from each other. Will be provided. Therefore, a superabrasive wheel having excellent sharpness and a long service life can be easily manufactured by providing a ground surface whose number of divisions is increased according to the number of divisions of the minute surface.
[0016]
[Another aspect of the second invention]
Here, preferably, the whetstone member manufacturing process includes plating in a state where a large number of abrasive grains are scattered in a masking pattern having a height dimension corresponding to a thickness dimension of the thin plate-shaped whetstone member. It is something to give. With this configuration, since the plating layer is formed in the thickness direction of the thin plate-shaped grinding wheel member, the grinding wheel member having a uniform cross section in the thickness direction and having an end surface divided into a plurality of minute surfaces can be easily formed. And, in turn, a superabrasive wheel to which the grindstone member is fixed is easily obtained. In addition, the time required for the plating process is shorter than when the thin plate-shaped grindstone member is plated in the height direction, so that there is an advantage that the production efficiency of the superabrasive wheel is increased. The plating treatment is, for example, electrolytic plating or electroless plating, and more preferably, electroforming.
[0017]
Preferably, the masking pattern is formed by a stereolithography method. In this manner, according to the stereolithography method, a finer and deeper masking pattern can be easily obtained as compared with a method using a photomask. As a result, a superabrasive wheel having good sharpness and a long service life can be more easily obtained.
[0018]
In the first invention and the second invention, preferably, the thin plate-like grindstone member has a planar shape whose length in a plane direction of the base metal is in a range of 5 to 50 (mm). Things. In order to reduce the number of grindstone members fixed to the base metal and to make the production cheap and easy, it is necessary to make the length dimension of each grindstone member sufficiently long, so that the length dimension is at least 5 ( mm) or more is desirable. On the other hand, if the length exceeds 50 (mm), it is not preferable because it is difficult to secure rigidity. The length dimension is more preferably 100 times or less the thickness dimension, and more preferably 50 times or less.
[0019]
Preferably, the thickness of the thin plate-shaped grindstone member in the plane direction of the base metal is in a range of 0.05 to 1 (mm). If the thickness is less than 0.05 (mm), the rigidity becomes insufficient, and if a thickness exceeding 1 (mm) is to be obtained by plating, the time required for production becomes extremely long. The thickness dimension is more preferably in the range of 0.1 to 0.8 (mm), more preferably in the range of 0.15 to 0.6 (mm). The thickness is preferably at least three times the average particle size of the abrasive grains in order to reliably hold the abrasive grains.
[0020]
Preferably, the thin plate-shaped grindstone member is fixed to the surface of the base metal such that the protrusion height on the surface of the base metal is within a range of 1 to 10 (mm). In order to secure a sufficient usage margin and obtain a useful life, it is preferable that the protrusion length be at least 1 (mm), while to ensure rigidity, a protrusion length of 10 (mm) or less is preferable. . More preferably, the overhang length is no more than 30 times the thickness dimension, more preferably no more than 20 times.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
[0022]
FIG. 1 is a perspective view showing the entire superabrasive wheel 10 according to one embodiment of the present invention. In the figure, a superabrasive wheel 10 has a base 12 having a bowl shape (cup shape), that is, a bottomed cylindrical shape having an outer diameter of about 250 (mm) and an inner diameter of about 230 (mm), and a circle of the base 12. The annular end face 14 is composed of a plurality of thin plate-shaped grindstone members 16 fixed on a circumference having a diameter of, for example, about 240 (mm) (that is, a substantially central portion of the thickness of the cylindrical portion).
[0023]
The base metal 12 is made of, for example, a metal material such as steel, a titanium alloy, a metal matrix composite (MMC: metal matrix composite material), an aluminum alloy, or a synthetic resin material such as an engineering plastic. At the center of the bottom of the base metal 12, a mounting hole 18 for mounting to a rotating spindle of a predetermined grinding device (not shown) at the time of grinding is provided so as to penetrate in the thickness direction thereof. In consideration of the mechanical rigidity of the grinding device, the base metal 12 is desired to be as lightweight as possible so that the influence on the processing accuracy is minimized. Therefore, an aluminum alloy is most preferable. However, when the mechanical rigidity is sufficiently high, it is conceivable to use a material having high rigidity such as a titanium alloy or MMC in order to further enhance the processing accuracy.
[0024]
In addition, the abrasive member 16 includes a large number of diamond abrasive grains or super-abrasive grains such as CBN abrasive grains having an average particle diameter of, for example, about 35 (μm) in a range of 0.05 to 50 (μm). These are mutually bonded by a metal binder made of a nickel alloy or the like. In the whetstone member 16, each tip surface 20 (see FIG. 2) projecting in the axial direction of the base metal 12 is divided into a plurality of, for example, three. The many tip surfaces 20 of the plurality of grindstone members 16 are located on one plane, and these constitute the ground surface of the superabrasive wheel 10. In the present embodiment, the tip end surface 20 corresponds to a minute surface.
[0025]
As shown in FIG. 2 in an enlarged manner, the grindstone member 16 has, for example, a tip end surface 20 divided into three as described above, that is, a grinding portion 24 on the tip end side including three parallel strips 22. , And a wide fixing portion 26 provided on the base end side to integrate the band portion 22. The base end face 14 is provided with an annular groove 28 coaxially with the outer peripheral edge and the inner peripheral edge thereof, and the grindstone member 16 is fitted into the annular groove 28 at the fixing portion 26 in a partially exposed state. And is fixed by a synthetic resin adhesive 30 such as an epoxy resin. The height dimension h of the exposed portion (that is, the exposed length dimension in the direction along the axial direction of the base metal 12) is, for example, in the range of 1 to 10 (mm), for example, about 3.5 (mm). The thickness t (that is, the thickness in the direction along the radial direction of the base metal 12) is, for example, in the range of 0.05 to 1.0 (mm), for example, about 0.3 (mm). It is a uniform value. The length L in the direction along the circumferential direction of the end face 14 is, for example, in the range of 5 to 50 (mm), for example, about 12 (mm). Therefore, in this embodiment, the thickness t is about 8 times the abrasive grain size, the exposed height h is about 11 times the thickness t, and the length L is 40 times the thickness t. It is about. The grindstone member 16 has a slightly curved shape in the longitudinal direction following the annular groove 28.
[0026]
FIG. 3 is a diagram showing the grinding wheel member 16 in a front view. The height hg of the grinding portion 24 is in the range of 1 to 9.9 (mm), for example, about 2.5 (mm), and the height hs of the fixing portion 26 is 1 to 10.0 (mm). Within the range, for example, about 4 (mm). Therefore, in a state where the grinding stone member 16 is fixed to the base metal 12, the entire grinding portion 24 and a part of the upper end of the fixing portion 26 are exposed on the end surface 14. The depth of the annular groove 28 is, for example, about 3 (mm), which is substantially equal to the height of the non-exposed portion of the fixing portion 26, and the groove width is the thickness of the grindstone member 16. It is slightly larger than t. Further, the width of the strip 22 is, for example, about 2 (mm), for example, in the range of 0.1 to 5 (mm), and the width g of the gap between them is 0.1 to 5 ( mm), for example, about 2 (mm). Further, the band-shaped portions 22 at both ends are retracted from both end positions of the fixing portion 26 by, for example, about e = 1 (mm).
[0027]
The superabrasive wheel 10 has such a grindstone member 16 fixed in the circumferential direction, for example, within a range of 0.1 to 20 (mm), for example, at a uniform interval of about 10 (mm). . The number of the grindstone members 16 is, for example, 34 since they are fixed on a circumference having a diameter of about 240 (mm) as described above. In FIG. 1, for convenience of illustration, the number of the grindstone members 16 is 24, and the distance between the grindstone members 16 is smaller than the length L of the grindstone members 16.
[0028]
The superabrasive wheel 10 configured as described above is mounted so as to be coaxial with the rotating main shaft of a predetermined grinding device in the mounting hole 18 and is driven to rotate around its axis S, whereby a plurality of superabrasive wheels 10 are provided. This is used for so-called surface grinding in which a workpiece (not shown) is ground by a grinding surface constituted by the tip end surface 20 of the grinding wheel member 16. Such a cup-type superabrasive wheel 10 is preferably used for grinding hard brittle materials such as, for example, silicon, compound semiconductors, glass, ceramics, ferrite, quartz, quartz, and cemented carbide. .
[0029]
Incidentally, the superabrasive wheel 10 as described above is manufactured, for example, according to the manufacturing process shown in FIG. Hereinafter, the manufacturing method will be described according to FIG. 4 with reference to FIGS. First, in an electroforming pattern manufacturing process P1, an electroforming mold 32 for manufacturing the grindstone member 16 is manufactured. FIG. 5 is a perspective view showing the entire electroforming mold 32, and FIG. The electroforming mold 32 is formed by providing a masking pattern 36 made of a non-conductive material on one surface of a substrate 34 made of, for example, stainless steel.
[0030]
The masking pattern 36 has, for example, about 500 (μm) from the surface of the substrate 34, that is, a height dimension sufficiently higher than the thickness dimension of the grindstone member 16, and has a relatively large dimension, for example, about 200 (μm). It has a narrow width. In the pattern 36, for example, eight closed figures corresponding to the grindstone members 16 are provided in close contact with each other, for example, six in one direction, and, for example, 48 grindstone members 16 are obtained at one time. It has become. Such a pattern 36 is formed, for example, by patterning a photocurable resin used for pattern formation by photolithography on the substrate 34 in a normal etching process, or by cutting out an insulating tape and attaching the substrate to the substrate 34. Be composed. In addition to these methods, for example, a so-called stereolithography in which a three-dimensional resin film is obtained by irradiating a laser beam while changing a depth position of a focus on a photocurable resin applied to a predetermined thickness dimension, for example. A process can also be used. In photolithography, tape bonding, and the like, it is difficult to obtain a sufficient depth dimension with a sharp edge in order to manufacture the grindstone member 16 having a thickness dimension of, for example, about 300 (μm) as described above. However, according to the stereolithography process, a resin film having a desired height and a uniform width can be easily obtained.
[0031]
Next, in the electrolytic plating step P2, the above electroforming mold 32 is immersed in the plating tank 38, and the abrasive grains 40 are scattered in the masking pattern 36, followed by electrolytic plating. That is, electroforming is performed using the masking pattern 36. The plating conditions are, for example, as shown in Table 1 below. The abrasive grains 40 are, for example, diamond abrasive grains having an average particle diameter of about 35 (μm), and are in a scattered state to which at least the volume of the grinding stone member 16 to be manufactured is supplied. For example, the electroforming mold 32 shown in the figure is 74 × 44 (mm ² ), And when manufacturing the grindstone member 16, the thickness of the height plating layer 42 is set to about 0.3 (mm). (Cm ³ ) About. Since the specific gravity of the diamond abrasive grains is about 3.52, plating is performed while uniformly dispersing at least about 4 (g) or more, for example, about 40 (g) in the plating tank 38. Further, under the following conditions, the deposition rate of the plating layer 42 is, for example, about 6 (μm / hr). Therefore, to obtain a thickness of, for example, 300 (μm), the time required for the plating process is, for example, about 50 hours. become. FIG. 7A shows a stage where the abrasive grains 40 are scattered, and FIG. 7B shows a stage where the plating layer 42 is formed. In the present embodiment, the electrolytic plating process P2 corresponds to a grindstone member manufacturing process.
[0032]
[Table 1]
Plating conditions
・ Plating solution: Watt bath (nickel sulfate, boric acid, nickel chloride)
(If necessary, include organic additives for adjusting plating hardness and stress)
-PH: 3-5
・ Temperature: 25 to 55 (° C)
-Current density: 0.5 (A / dm ² )
[0033]
In the above plating conditions, a watt bath is used as the plating solution 44. Alternatively, for example, a nickel sulfamate bath or a nickel-cobalt alloy plating bath may be used. In addition, electroless plating can be used instead of electrolytic plating as described above.
[0034]
Next, in a peeling step P3, the electroformed product formed on the electroforming mold 32 in the electrolytic plating step P2 is peeled from the electroforming mold 32. At this time, a surface treatment such as acid cleaning is performed as necessary. For example, when the surface of the substrate 34 is a sufficiently fine polished surface or the like, the substrate 34 can be peeled without any surface treatment. It is. The peeled electroformed product is cleaned with, for example, an ultrasonic cleaner. In this way, the above-mentioned grindstone member 16 is obtained. FIG. 7C shows the peeled whetstone member 16.
[0035]
Next, in the bonding step P4, the grindstone member 16 is bonded to the end face 14 of the base metal 12 with a synthetic resin adhesive 30 such as an epoxy resin (see FIG. 2). That is, the above-mentioned annular groove 28 is formed in the end face 14 in advance, and the grindstone member 16 is inserted and fixed in the annular groove 28. FIG. 7D is a diagram for explaining an implementation state of this step. Since the grindstone member 16 manufactured by electroplating using the electroforming mold 32 is a flat thin plate, the grindstone member 16 is inserted therein while being slightly curved in accordance with the curvature of the annular groove 28. In the present embodiment, this bonding step P4 corresponds to a fixing step.
[0036]
Next, in the finishing step P5, the tip surfaces 20 of the plurality of bonded grindstone members 16 are adjusted in shape by, for example, cutting or the like, whereby the superabrasive wheel 10 as shown in FIG. 1 is manufactured. The protrusion height dimension h of the grindstone member 16 described above is a value after this cutting. Therefore, in anticipation of this cutting allowance of about 0.5 (mm), the length dimension hg of the grinding portion 24 is set to, for example, about 3 (mm) in the manufacturing stage of the grindstone member 16. Therefore, in the bonding step P4, the grindstone members 16 are bonded while protruding from the end face 14 by, for example, about 4 (mm).
[0037]
As described above, according to the present embodiment, since the grinding portion 24 having the end surface divided into the three minute tip surfaces 20 is provided on each of the plurality of grinding stone members 16, the superabrasive wheel 10 Is provided with a ground surface divided into a number obtained by multiplying the number of sticks by the number of divisions. For this reason, the number of divisions of the grinding surface can be increased while keeping the number of the grindstone members 16 fixed to the base metal 12 relatively small, so that the superabrasive grain wheel 10 which is easy to manufacture and has excellent sharpness and service life can be obtained. .
[0038]
Further, according to the present embodiment, the grinding wheel member 16 has a thin plate shape having a uniform thickness dimension as a whole, and the grinding portion 24 includes a plurality of belt portions 22 parallel to each other. Since the distal end 22 has a minute distal end surface 20, even if a plurality of strips 22 are gradually worn from the tip, they are worn down to the base end until the strips 22 completely disappear. The tip surfaces 20 are maintained independent of each other. As a result, a superabrasive wheel 10 having a much longer service life can be obtained. For example, in the grindstone member 16 having the length dimension hg of about 2.5 (mm) after the finishing step P5 as in this embodiment, it is possible to secure a use allowance of about 2 (mm). Further, when the base end is worn, the contact area between the grindstone member 16 and the material to be ground increases, so that sharpness sharply deteriorates. This indicates that the service life of the superabrasive wheel 10 has been reached. In addition, since the processing pressure at the grinding point can be set relatively high due to the thin plate shape, the hard workpiece to which the abrasive grains 40 hardly penetrate can be easily ground, and the center of the large ground surface can be ground. Since there is little contribution to the grinding process and there is almost no portion that causes clogging, there is an advantage that the sharpness is further enhanced.
[0039]
Further, in the present embodiment, in the electrolytic plating process P2, a plurality of the grindstone members 16 each having the fixing portion 26 and the grinding portion 24 having the plurality of fine tip surfaces 20 are manufactured, while the bonding process P4 is performed. The super abrasive wheel 10 is manufactured by fixing the fixing portion 26 to the surface of the base metal 12. For this reason, the superabrasive wheel 10 has a grinding portion 24 divided into a fixing portion 26 for fixing to the base metal 12 and a plurality of tip surfaces 20 whose end surfaces for forming a grinding surface are separated from each other. And a grinding stone member 16 having the following. Therefore, by providing a ground surface whose number of divisions is increased according to the number of divisions of the front end surface 20, it is possible to easily manufacture the superabrasive wheel 10 having excellent sharpness and service life.
[0040]
Further, in the present embodiment, the electrolytic plating step P2 is a state in which a large number of abrasive grains 40 are scattered in a masking pattern 36 having a height dimension corresponding to the thickness dimension of the thin plate-like grindstone member 16. Since the plating process is performed in this manner, the plating layer 42 is formed in the thickness direction of the thin plate-shaped grindstone member 16, and thus has a uniform cross section in the thickness direction and a plurality of minute tip surfaces. The grindstone member 16 divided into 20 is easily obtained, and the superabrasive wheel 10 to which the grindstone member 16 is fixed is easily obtained. In addition, since the time required for the plating process is shorter than when the thin plate-shaped grindstone member 16 is plated in the height direction, there is an advantage that the production efficiency of the superabrasive wheel 10 can be increased.
[0041]
In this embodiment, since the length of the grindstone member 16 is, for example, about 12 (mm), the number of the grindstone members 16 fixed to the base metal 12 is sufficiently reduced, and the manufacturing is cheap and easy. At the same time, since the length is limited to, for example, about 40 times the thickness t, sufficiently high rigidity is secured.
[0042]
Further, in the present embodiment, since the thickness of the grindstone member 16 is about 0.3 (mm), it has sufficient rigidity and can be manufactured in a relatively short time. Further, since the thickness is about eight times the average particle diameter of the abrasive grains 40, the holding of the abrasive grains 40 is ensured.
[0043]
Further, in this embodiment, the protrusion height on the end face 14 is about 3.5 (mm), so that a sufficient use margin of about 2 (mm) is ensured, and the service life can be obtained. Sufficient rigidity is secured because the thickness is kept to about 11 times the thickness.
[0044]
Next, another embodiment of the present invention will be described. FIG. 8 is a perspective view showing the whole of a grindstone member 46 that can constitute a superabrasive wheel in place of the grindstone member 16. In the figure, the grindstone member 46 has substantially the same dimensions and outer shape as the aforementioned grindstone member 16, but does not include the aforementioned band 22, and instead has a semi-cylindrical shape on the tip end surface 20. And a plurality of (for example, five) through holes 48 penetrating in the thickness direction at the inner position. The diameter of the through hole 48 is, for example, in the range of 0.05 to 1 (mm), for example, about 2 (mm), and is provided in multiple stages (two stages in the figure).
[0045]
The above-mentioned grindstone member 46 is also used by being bonded to the base metal 12 in a direction in which the tip end surface 20 is located on the upper side. When the distal end surface 20 is worn down during the grinding process and retreats to the position where the through-hole 48 is provided, the distal end surface 20 is formed only at a portion between the exposed through-holes 48. That is, the end surface of the grindstone member 46 is divided into the plurality of minute tip surfaces 20 by the through holes 48. Therefore, even when such a grindstone member 46 is used, an excellent service life can be obtained as in the case of the superabrasive wheel 10 described above.
[0046]
FIG. 9 is a plan view of still another grindstone member 50 as viewed from its tip end side. The grindstone member 50 has an arc-shaped planar shape. For example, in the electroforming mold 32 as shown in FIG. 6 described above, the formation surface of the plating layer 42 corresponding to each of the plurality of grindstone members is It is manufactured by using a material having a shape. This grindstone member 50 can also constitute a superabrasive grain wheel by being bonded to the base metal 12 similarly to the grindstone member 16. That is, the constituent material of the superabrasive wheel is not limited to the one in which the tip surface 20 forms a straight line such as the grindstone members 16 and 46, and it is possible to use a grindstone member having various shapes of tip surfaces. Note that, when fixing to the base metal 12, for example, it is inserted and fixed into the annular groove 28 having a width approximately equal to the radius of the arc of the grindstone member 50.
[0047]
FIGS. 10 and 11 are plan views respectively illustrating examples of other arrangement shapes of the grindstone member 16 or 46 on the base metal 12. In FIG. 10, the grindstone member 16 and the like are fixed in a direction inclined by a certain angle with respect to the radial direction and the circumferential direction of the base metal 12. In FIG. 11, the grindstone members 16 and the like adjacent to each other in the circumferential direction are fixed so that the inclination directions thereof are opposite to each other. As described above, the arrangement pattern of the grindstone members 16 and the like is such that the longitudinal direction is arranged along the circumferential direction of the base metal 12 on one circumference as shown in FIG. Various patterns such as these can be used depending on the application.
[0048]
In the superabrasive grain wheel 10 shown in FIG. 1, the annular groove 28 is provided on the end face 14 of the base metal 12, and the flat-shaped grindstone member 16 is slightly curved in accordance with the curvature of the annular groove 28. As a result, the grindstone member 16 is fixed so as to form an annular grinding surface as a whole. However, when a large number of grinding stone members 16 are provided on the end face 14, even if the grinding surface is substantially annular, the grinding surface may not be perfectly annular (for example, even if it has a polygonal shape). It is considered that performance can be obtained. Therefore, the disposition shape of the grindstone member 16 and the like may be, for example, a regular polygon as shown in FIG. In this arrangement, as shown in FIG. 13, the individual grindstone members 16 are fitted into the grooves 52 while being flat, and fixed by bonding or the like. For this reason, the groove 52 has a regular polygon shape in which each side is slightly longer than the length of the grindstone member 16, or an annular ring having a width dimension that allows the grindstone member 16 to be inserted flat. Has formed. According to such an arrangement, it is not necessary to fit the whetstone member 16 in a curved state, so that the manufacturing is further simplified and the whetstone member 16 is hardly damaged because no stress due to bending is generated. There are advantages.
[0049]
As described above, the preferred embodiments of the present invention have been described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, and may be implemented in other embodiments.
[0050]
For example, in the embodiment, the superabrasive grain wheel 10 which is a cup-shaped wheel for surface grinding formed by bonding the grindstone members 16, 46 and the like to the annular end face 14 of the cylindrical metal base 12 having a bottom. Has been described above, the shape of the base metal 12 is not particularly limited, and various shapes can be used. For example, the present invention is also applied to a disk wheel for surface grinding constituted by using a disk-shaped base metal. When such a base is used, the grindstone member may be bonded not only to its peripheral edge but also to, for example, the entire circular end face.
[0051]
Further, in the embodiment, for example, the polishing surface of the superabrasive grain wheel 10 is constituted by about 100 minute surfaces by using the grindstone member 16 having three band-shaped portions 22. In order to form a small number of surfaces, a long grindstone member having a longer length L and having a greater number of strips 22 can be used. By doing so, the number of grinding stone members to be adhered to the end face 14 is further reduced, so that there is an advantage that the production becomes easier. In addition, since the grindstone member is thin, it can be relatively easily curved, so that it is easy to fit the grindstone member in the annular groove 28 even if the length dimension L becomes long.
[0052]
Further, in the embodiment, the grindstone member 16 is manufactured by electrolytic plating, that is, by electroforming, but may be manufactured by electroless plating. In addition, the whetstone member 16 and the like are not limited to those manufactured by plating, and powder press molding or casting may be used as long as a desired shape can be manufactured.
[0053]
Further, in the embodiment, the grindstone member 16 and the like are formed by bonding the abrasive grains 40 with a nickel alloy. However, the type of the binder is not particularly limited, and depending on the application, a synthetic resin binder or glass may be used. A binder may be used.
[0054]
In addition, the configuration of each part such as the size of the grindstone member 16 and the amount of protrusion from the end face 14 is not limited to those described in the examples, but may be appropriately changed depending on the use of the superabrasive wheel. .
[0055]
Further, in the embodiment, the abrasive grains 40 are diamond abrasive grains, but the abrasive grains 40 provided on the grindstone member 16 and the like may be super abrasive grains, and may be, for example, CBN.
[0056]
Further, in the embodiment, the grindstone member 16 is bonded on one circumference of the annular end face 14 of the base metal 12, but the grindstone member 16 is bonded on two or more circumferences. Double or more multiplexes may be provided.
[0057]
Although not specifically exemplified, the present invention is embodied with various changes without departing from the spirit of the invention.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an entire superabrasive wheel according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a part of FIG. 1 for explaining a configuration and a fixing structure of a grindstone member.
FIG. 3 is a plan view illustrating dimensions of each part of a grindstone member provided in the superabrasive grain wheel of FIG.
FIG. 4 is a process chart illustrating a method for manufacturing the superabrasive wheel of FIG.
FIG. 5 is a perspective view showing an electroforming mold for manufacturing a grindstone member in the manufacturing method of FIG.
FIG. 6 is an enlarged view showing a part of the electroforming mold of FIG. 5;
7 (a) to 7 (d) are schematic diagrams for explaining an implementation state at a main part stage of the manufacturing process of FIG. 4;
FIG. 8 is a perspective view illustrating another example of a grindstone member constituting the superabrasive grain wheel of the present invention.
FIG. 9 is a plan view illustrating still another example of the shape of the grinding wheel member.
FIG. 10 is a plan view illustrating another example of the arrangement shape of the grindstone members.
FIG. 11 is a plan view illustrating still another example of the arrangement shape of the grindstone members.
FIG. 12 is a plan view illustrating still another example of the arrangement shape of the grindstone members.
13 is a view corresponding to FIG. 2 for explaining a fixed state of the grindstone member in the arrangement shape of FIG. 12;
[Explanation of symbols]
10: Super abrasive wheel
12: Deposit
14: End face
16: Whetstone member
20: Tip surface
24: Grinding unit
P2: Electroplating process
P4: Bonding process

Claims (7)

A plurality of grindstone members in which a number of superabrasive grains are combined by a binder are fixed at predetermined positions on the surface of a base metal, and a grinding surface is formed by an end face located on a predetermined surface of the plurality of grindstone members. An abrasive wheel,
Each of the plurality of grindstone members is provided at one end thereof and is fixed to the base metal, and the end surfaces provided at the other end and constituting the grinding surface are separated from each other. And a grinding portion divided into a plurality of minute surfaces. The superabrasive wheel according to claim 1, wherein each of the plurality of minute surfaces has an area within a range of 0.01 to 1 (mm ² ). The whetstone member is formed in a thin plate shape having a uniform thickness dimension as a whole, and the grinding portion is formed of a plurality of belt portions parallel to each other and has the micro surface at a tip of the belt portion. The superabrasive wheel of claim 1. The grinding wheel member has a thin plate shape with a uniform thickness dimension as a whole, and the grinding portion has a plurality of through holes penetrating in a thickness direction between a boundary with the fixing portion and the end face. The superabrasive wheel of claim 1. A plurality of grindstone members in which a number of superabrasive grains are combined by a binder are fixed at predetermined positions on the surface of a base metal, and a grinding surface is formed by an end face located on a predetermined surface of the plurality of grindstone members. A method for manufacturing an abrasive wheel,
A grindstone member for producing a plurality of thin plate-shaped grindstone members having a fixed portion at a predetermined shape at one end and a grinding portion having the end surface divided into a plurality of minute surfaces separated from each other at the other end. Manufacturing process;
Fixing the plurality of grindstone members to the surface of the base metal at the fixing portion so that the end surfaces are located on one surface. 6. The grinding wheel member manufacturing process, wherein a plating process is performed in a state where a large number of abrasive grains are scattered in a masking pattern having a height dimension corresponding to a thickness dimension of the thin plate-shaped grinding wheel member. Manufacturing method of super abrasive wheel. 6. The method for manufacturing a superabrasive wheel according to claim 5, wherein the masking pattern is formed by a stereolithography method.

Images