JP6367614B2 - Grinding wheel manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a grinding wheel for grinding a workpiece formed of a tough material such as resin or metal.

  Usually, processing such as flattening or thinning is performed on a tough material such as resin or metal in a cutting tool (see, for example, Patent Document 1). In the cutting tool disclosed in Patent Document 1, a wheel base is attached to a spindle mount that rotates about a vertical axis, and a cutting tool such as a diamond blade or a super steel tool is fixed to a part of the outer periphery of the wheel base. Has been. Then, by rotating the cutting tool around the vertical axis of the spindle, the tough material of the workpiece held on the chuck table is scraped off by the cutting tool and flattened or thinned.

Japanese Patent Application Laid-Open No. 2000-173954

  In the machining method described in Patent Document 1, since the sharp shape of the bite tool gradually collapses and the machining quality deteriorates when the number of machining is repeated, it is necessary to periodically correct the shape of the bite tool. It was. However, special processing such as electric discharge machining is necessary for correcting the shape of a cutting tool such as a diamond blade or a super steel cutting tool, and there is a problem that another equipment for correcting the shape and a lot of time are required. In addition, it is conceivable to use a grinding wheel that makes it easy to modify the shape of the grinding wheel instead of using a bite tool, but the grinding wheel clogs with a normal grinding wheel, so the tough material is ground well. Difficult to do.

  The present invention has been made in view of these points, and an object of the present invention is to provide a method for manufacturing a grinding wheel that can satisfactorily process a tough material and can easily recover grinding performance in a short time. To do.

The method for manufacturing a grinding wheel according to the present invention includes a wheel base mounted on a rotating spindle having a rotating shaft and fixed to the rotating spindle and having a fixed end and a free end, and an outer peripheral portion of the free end. A grinding wheel manufacturing method for manufacturing a grinding wheel for grinding a workpiece, the grinding wheel comprising: a grinding wheel that protrudes from and is fixed to a free end surface of the free end portion. The fixed end side of a rectangular parallelepiped segment grindstone in which diamond abrasive grains are bonded to the outer peripheral portion of the end portion with a bonding agent, and the free end side of the segment grindstone with respect to the rotation axis is the free end portion of the wheel base A whetstone mounting portion forming step for forming a whetstone mounting portion including a side surface and a ceiling surface that are inclined so as to be able to be mounted so as to project outward from the outer peripheral surface of the wheel base toward the lower side, and the whetstone Dress After performing the part forming step, the fixed end side of the segment grindstone is brought into contact with the side surface and the ceiling surface of the grindstone mounting portion of the wheel base, and the free end is freed of the wheel base. A segment grindstone adhering step that protrudes from the end surface and adheres to the grindstone mounting portion, and after performing the segment grindstone adhering step, the segment grindstone is formed on the free end side of the segment grindstone with a molding dressboard held on a chuck table A grinding wheel in which the grinding wheel is formed by flattening the contact end in contact with the molding dressboard until it becomes perpendicular to the rotation axis, and forming the outer peripheral end surface of the segment grinding wheel and the contact end at an acute angle. And a molding step.

  According to this configuration, the segment grindstone is dressed by the molded dressboard in a state where the rectangular parallelepiped segment grindstone is obliquely mounted on the wheel base grindstone mounting portion. The contact end of the segment grindstone that comes into contact with the molded dressboard is cut, so that the outer peripheral end face and the contact end are formed at an acute angle. In this case, since the angle between the outer peripheral end face and the contact end of the grinding wheel depends on the inclination angle of the segment grindstone, the angle between the outer peripheral end face and the contact end is adjusted to a desired angle by adjusting the inclination angle of the side face of the grindstone mounting portion. Can be formed. In addition, since the outer peripheral end surface is inclined with respect to the surface of the workpiece, the workpiece formed by the tough material is subjected to creep feed grinding while the outer peripheral end surface acts on the workpiece. Thinning can be performed satisfactorily. In addition, since the grinding wheel is formed by bonding diamond abrasive grains with a bonding agent, the shape of the grinding wheel can be corrected with a molded dressboard even if the shape of the grinding wheel deteriorates.

  According to the present invention, it is possible to easily manufacture a grinding wheel in which the outer peripheral end face of the grinding wheel is inclined by attaching the segment grindstone obliquely to the grindstone mounting portion of the wheel base and dressing with the molding dressboard. it can. With this grinding wheel, the tough material can be processed satisfactorily and the shape of the grinding wheel can be easily modified in a short time.

It is a perspective view of the grinding device concerning this embodiment. It is a perspective view which shows the grinding process by the grinding apparatus which concerns on this Embodiment. It is sectional drawing of the mount of the grinding means which concerns on this Embodiment, and a grinding wheel. It is explanatory drawing of the manufacturing method of the grinding wheel which concerns on this Embodiment. It is explanatory drawing of the dressing process with respect to the grinding operation | movement with respect to the to-be-processed object which concerns on this Embodiment, and a grinding wheel. It is explanatory drawing of the grinding wheel which concerns on a modification.

  Hereinafter, the grinding apparatus according to the present embodiment will be described with reference to the accompanying drawings. FIG. 1 is a perspective view of a grinding apparatus according to the present embodiment. FIG. 2 is a perspective view showing grinding by the grinding apparatus according to the present embodiment. Note that the grinding apparatus according to the present embodiment is not limited to the apparatus configuration dedicated to the grinding process as shown in FIG. 1, and for example, a series of processes such as a grinding process, a polishing process, and a cleaning process are performed fully automatically. It may be incorporated into a fully automatic type processing apparatus.

  As shown in FIG. 1, the grinding apparatus 1 creep feeds the upper surface of the workpiece W by a single grinding wheel 56 while feeding the chuck table 3 holding the workpiece W in the X-axis direction at a low speed. It is configured to grind. The chuck table 3 of the grinding apparatus 1 holds the molding dress board D for the shaping dress and the dressing dress periodically instead of the workpiece W, and the molding dress board D is subjected to creep feed grinding. The grinding wheel 56 is dressed. The workpiece W may be a wafer formed in a disk shape with a tough material such as resin or metal, or may be a wafer in which a layer of tough material is formed on the surface to be ground.

  A rectangular opening extending in the X-axis direction is formed on the upper surface of the base 2 of the grinding apparatus 1, and this opening is covered with a movable plate 31 that can move together with the chuck table 3 and a bellows-shaped waterproof cover 32. ing. Below the waterproof cover 32, ball screw type advance / retreat means 36 for moving the chuck table 3 in the radial direction (X-axis direction) is provided. On the surface of the chuck table 3, a holding surface 34 for adsorbing the workpiece W by a porous porous material is formed. The holding surface 34 is connected to a suction source (not shown) through a flow path in the chuck table 3, and the workpiece W is sucked and held by the negative pressure generated on the holding surface 34.

  The column 21 on the base 2 is provided with a grinding feed means 4 that moves the grinding means 5 toward and away from the chuck table 3 in the grinding feed direction (Z-axis direction). The grinding feed means 4 has a pair of guide rails 41 arranged in the column 21 and parallel to the Z-axis direction, and a motor-driven Z-axis table 42 slidably installed on the pair of guide rails 41. . Nut portions (not shown) are formed on the back side of the Z-axis table 42, and a ball screw 43 is screwed into these nut portions. The ball screw 43 is rotationally driven by a drive motor 44 connected to one end of the ball screw 43, so that the grinding means 5 is moved along the guide rail 41 in the Z-axis direction.

  The grinding means 5 is attached to the front surface of the Z-axis table 42 via a housing 51, and is configured by providing a mount 53 at the lower end of a cylindrical rotary spindle 52. The rotary spindle 52 is provided with a flange 54, and the grinding means 5 is supported on the housing 51 via the flange 54. On the lower surface of the mount 53, a grinding wheel 55 on which a single grinding wheel 56 is arranged is rotatably held. The grinding wheel 56 is composed of, for example, a segment grindstone in which diamond abrasive grains are hardened with a bonding agent such as metal bond. Details of the grinding wheel 56 will be described later.

  In the grinding apparatus 1 configured in this way, as shown in FIG. 2, the grinding means 5 is brought close to the chuck table 3 while the grinding wheel 55 is rotated around the Z axis by the rotary spindle 52. Then, grinding water is supplied toward the workpiece W, and the grinding wheel 56 is rotationally brought into contact with the workpiece W, whereby the grinding wheel 56 and the workpiece W are relatively slid and processed. The object W is ground. With the workpiece W ground by the grinding wheel 56, the chuck table 3 is moved horizontally in the X-axis direction at a low speed, so that the workpiece W is creep-feed ground by the grinding wheel 56.

  By the way, since the workpiece W according to the present embodiment is formed of a tough material, it is preferable to work with a bite tool such as a diamond blade or a super steel bite. Time and dedicated equipment are required. The present applicant has found that by making the grinding wheel 56 shaped like a bite tool, machining quality equivalent to that of a bite tool can be obtained and shape correction can be facilitated. As a result, the tough material workpiece W can be easily processed, and when the grinding wheel 56 is worn, the grinding ability can be easily recovered in a short time with the molded dressboard D (see FIG. 1).

  However, it takes time to form the grinding wheel 56 having such a special shape with a sintered bond. Further, when the grinding wheel 56 of this shape is fixed to the wheel base 57 of the grinding wheel 55 with an adhesive, variation or the like occurs, and the grinding wheel 56 is accurately fixed to the wheel base 57 at a desired inclination angle. Difficult to do. Therefore, in the manufacturing method of the grinding wheel 55 according to the present embodiment, dressing with the molded dressboard D with the rectangular parallelepiped segment grindstone 65 (see FIG. 4B) attached to the wheel base 57 obliquely. The grinding wheel 55 in which the outer peripheral end face 61 on the outer peripheral side of the grinding wheel 56 is inclined is manufactured.

  The grinding wheel will be described with reference to FIG. FIG. 3 is a cross-sectional view of the mount of the grinding means and the grinding wheel according to the present embodiment. In addition, the grinding wheel which concerns on this Embodiment is not limited to the structure shown in FIG. 3, What is necessary is just to mount | wear with the grinding wheel inclining.

  As shown in FIG. 3, the grinding wheel 55 is mounted on a mount 53 of a rotary spindle 52 having a rotation axis, and is configured by fixing a single grinding wheel 56 to a ring-shaped wheel base 57. The upper surface of the wheel base 57 is a fixed end 58 fixed to the rotary spindle 52 via the mount 53, and the lower surface of the wheel base 57 is a free end 59. A single grinding wheel 56 is fixed on the outer peripheral side of the free end portion 59 so as to protrude from the free end surface of the free end portion 59. The grinding wheel 56 is mounted obliquely with respect to the wheel base 57, and the corner 63 of the outer peripheral end surface 61 and the bottom surface 62 is formed at an acute angle.

  The wheel base 57 is made of a material that is relatively easy to process, such as aluminum, and is formed in a step shape in which the outer peripheral portion 72 protrudes downward from the inner peripheral portion 71. A supply port 73 connected to the supply path 69 of the grinding water in the rotary spindle 52 is formed in the inner peripheral portion 71 of the wheel base 57. The outlet of the supply port 73 is opened on the lower surface of the inner peripheral portion 71, and the inner peripheral surface of the outer peripheral portion 72 connected to the lower surface of the inner peripheral portion 71 is inclined so as to narrow the width of the outer peripheral portion 72 downward. A surface 74 is formed. Therefore, the grinding water flowing out from the supply port 73 is supplied to the grinding wheel 56 on the free end portion 59 side through the inclined surface 74 of the outer peripheral portion 72 while receiving a centrifugal force.

  On the outer peripheral portion 72 of the free end portion 59 of the wheel base 57, a grindstone mounting portion 76 on which the fixed end side of the grinding grindstone 56 is mounted is formed. The grindstone mounting portion 76 is formed in a V-shaped groove over the entire circumference by a side surface 77 inclined radially outward and a ceiling surface 78 inclined radially inward. The outer peripheral end surface 61 on the outer peripheral side of the grinding wheel 56 is mounted on the side surface 77 of the grinding wheel mounting portion 76, and the fixed end 66 side (see FIG. 4B) of the grinding wheel 56 is mounted on the ceiling surface 78 of the grinding wheel mounting portion 76. . As a result, the grinding wheel 56 is mounted on the wheel mounting portion 76 in an inclined state so as to project outward from the outer peripheral surface of the wheel base 57 downward from the free end portion 59 of the wheel base 57. .

  The grinding wheel 56 is formed so that an angle formed by the outer peripheral end surface 61 with respect to the horizontal bottom surface 62 becomes an acute angle when mounted on the wheel base 57 at an angle. By causing the inclined outer peripheral end surface 61 to act on the workpiece W, it is possible to obtain a machining quality equivalent to that of a bite tool even for the workpiece W formed of a tough material. In the grinding wheel 56, the fixed end 66 side of a rectangular parallelepiped segment grinding wheel 65 (see FIG. 4B) is obliquely mounted on the wheel mounting portion 76 of the wheel base 57, and the free end 67 side of the segment grinding wheel 65 is dressed horizontally. It is formed by. The details of the method for forming the grindstone mounting portion 76 on the wheel base 57 and the method for forming the grinding wheel 56 will be described later.

  Further, the acute corner portion 63 of the grinding wheel 56 is rounded due to wear over time as the number of workpieces W processed increases. However, since the grinding wheel 56 is formed by sintering diamond abrasive grains with a bonding agent, the corner of the grinding wheel 56 can be dressed with a molding dressboard D (see FIG. 1) like a normal grinding wheel. 63 can be easily corrected in a short time. The molded dressboard D is formed by solidifying a green carbide (GC) -based or white alundum (WA) -based abrasive in a disk shape with a bonding agent such as a resin bond. Further, the molded dressboard D is formed to have substantially the same diameter as the workpiece W.

  With reference to FIG. 4, the manufacturing method of a grinding wheel is demonstrated. FIG. 4 is an explanatory diagram of a method for manufacturing a grinding wheel according to the present embodiment. 4A shows a grindstone mounting portion forming step, FIG. 4B shows a segment grindstone adhering step, and FIG. 4C shows a grindstone forming step.

As shown to FIG. 4A, a grindstone mounting part formation step is implemented. In the grindstone mounting portion forming step, the grindstone mounting portion 76 is cut out by performing relief processing on the outer peripheral portion 72 of the wheel base 57 made of aluminum with a tool tool 89 (not shown) of a lathe. Here, the angle θ ₂ of the corner portion 63 of the outer peripheral end surface 61 and the bottom surface 62 of the grinding wheel 56 depends on the inclination angle θ ₁ of the side surface 77 of the grindstone mounting portion 76 with respect to the rotation axis direction (Z-axis direction) of the rotary spindle 52. doing. For this reason, the inclination angle θ ₁ of the side surface 77 of the grindstone mounting portion 76 is determined based on the angle θ ₂ required for the corner portion 63 of the grinding wheel 56. Specifically, since the sum of the inclination angle θ ₁ of the side surface 77 and the angle θ ₂ of the corner portion 63 is a right angle, the inclination angle θ ₁ of the side surface 77 is 90 degrees from the corner portion 63 of the grinding wheel 56. obtained by subtracting the angle theta _2.

Further, the ceiling surface 78 of the grindstone mounting portion 76 is orthogonal to the side surface 77, and the sum of the inclination angle θ ₃ of the ceiling surface 78 and the inclination angle θ ₁ of the side surface 77 with respect to the rotation axis direction of the rotary spindle 52 is a right angle. It has become. Therefore, the inclination angle theta ₃ of the ceiling surface 78 is equal to the angle theta ₂ of the corner portion 63 of the grinding wheel 56, the angle theta ₂ of the corner portion 63 is an inclination angle theta ₃ of the ceiling surface 78 is determined. Then, based on the inclination angle θ ₁ of the side surface 77 and the inclination angle θ ₃ of the ceiling surface 78, the tool tool 89 is moved to form a V-shaped groove-shaped grindstone mounting portion 76 on the wheel base 57. In this way, the segment grindstone is formed on the wheel base 57 such that the free end 67 of the rectangular parallelepiped segment grindstone 65 (see FIG. 4B) before the acute corner 63 is formed is inclined outward in the rotational direction. A side surface 77 and a ceiling surface 78 to which the fixed end 66 side of 65 is attached are formed.

  As shown to FIG. 4B, after implementing a grindstone mounting part formation step, a segment grindstone adhesion step is implemented. In the segment grindstone bonding step, the fixed end 66 side of the rectangular parallelepiped segment grindstone 65 is brought into contact with the side surface 77 and the ceiling surface 78 of the grindstone mounting portion 76 via an adhesive. Thus, the fixed end 66 side of the segment grindstone 65 is bonded to the grindstone mounting portion 76 of the wheel base 57 in a state where the free end 67 side of the segment grindstone 65 protrudes from the free end surface that is the lower surface of the wheel base 57. Since the segment grindstone 65 is bonded in an inclined state, the free end 67 side of the segment grindstone 65 is also inclined with respect to the horizontal plane.

  As shown in FIG. 4C, after performing the grindstone mounting portion forming step, the grindstone forming step is performed. In the grinding wheel forming step, the molding dress board D is held on the chuck table 3, and the molding dress board D is creep-feed ground by the segment grinding wheel 65. In this case, the lowermost corner of the segment grindstone 65 is a contact end 68 that contacts the molded dressboard D. Then, the segment grindstone 65 is rotated around the rotation axis of the rotary spindle 52, and the molding dressboard D is moved horizontally in the X-axis direction with respect to the segment grindstone 65, so that the contact end 68 is cut.

  By the dressing of the segment grindstone 65 by the molding dress board D, the contact end 68 of the segment grindstone 65 is flattened until it becomes perpendicular to the rotation axis (Z axis). Then, the segmented grindstone 65 is shaped so that the flattened contact end 68 (bottom surface 62) and the outer peripheral end surface 61 have an acute angle. In this manner, the grinding wheel 56 having the outer peripheral end surface 61 at an acute angle with respect to the contact end 68 can be created from the rectangular parallelepiped segment grinding wheel 65. In addition, since the grinding wheel 56 is formed in a state where the grinding wheel mounting portion 76 is formed on the wheel base 57 and the segment grinding wheel 65 is fixed to the grinding wheel mounting portion 76, the positional deviation of the grinding wheel 56 with respect to the wheel base 57 is reduced. Is prevented.

  With reference to FIG. 5, the grinding operation | movement with respect to the to-be-processed object using the grinding wheel which concerns on this Embodiment, and the dressing process with respect to a grinding wheel are demonstrated. FIG. 5 is an explanatory diagram of a grinding operation for a workpiece and a dressing process for a grinding wheel according to the present embodiment. 5A and 5B show a grinding operation for a workpiece, and FIGS. 5C and 5D show dressing for a grinding wheel. Note that the grinding operation and dressing shown in FIG. 5 are merely examples, and can be changed as appropriate.

  As illustrated in FIG. 5A, the workpiece W is held at the center of the chuck table 3, and the grinding wheel 56 is positioned outside the outer edge of the workpiece W. The grinding wheel 56 is lowered to a predetermined cutting depth while rotating around the rotation axis of the rotary spindle 52 at a high speed, and the chuck table 3 is moved horizontally relative to the grinding wheel 56. Thereby, creep feed grinding is started by the grinding wheel 56 from the one end 81 side to the other end 82 side of the workpiece W. In creep feed grinding, the surface of the workpiece W is scraped off in an arc shape by the side surface 77 and the outer peripheral end surface 61 on the front side in the rotational direction of the grinding wheel 56 while being fed in the X-axis direction.

  At this time, as shown in FIG. 5B, the outer peripheral end surface 61 of the grinding wheel 56 is inclined at an acute angle with respect to the bottom surface 62, so that the grinding resistance generated in the grinding wheel 56 during grinding of the workpiece W is reduced. . That is, the reaction force in the horizontal direction (X-axis direction) with respect to the grinding wheel 56 is reduced by the amount of reaction force acting in the vertical direction with respect to the inclined outer peripheral end surface 61. For this reason, the to-be-ground surface of the workpiece W after grinding is not whitened by friction, and the color of the to-be-ground surface is not shaded and the appearance is not deteriorated. Moreover, since grinding waste is generated in powder form, grinding waste does not accumulate at the drain outlet in the apparatus, and the drain outlet is not clogged.

  As shown in FIG. 5C, when the corner 63 of the grinding wheel 56 is worn by creep feed grinding of the workpiece W, the molded dressboard D is held on the chuck table 3 instead of the workpiece W. Further, the grinding wheel 56 is positioned outside the outer edge of the molded dressboard D. Then, the grinding wheel 56 is lowered to a predetermined depth while rotating around the rotation axis of the rotary spindle 52 at a high speed, and the chuck table 3 is moved horizontally relative to the grinding wheel 56. Thereby, creep feed grinding is started from the one end 83 side of the molding dressboard D toward the other end 84 side by the grinding wheel 56. In creep feed grinding, the molding dressboard D is processed and fed in the X-axis direction while the grinding wheel 56 is pressed against the molding dressboard D.

  As shown in FIG. 5D, the bottom surface 62 of the grinding wheel 56 is dressed by the molding dress board D, so that the roundness is removed from the corner 63 between the outer peripheral end surface 61 and the bottom surface 62 of the grinding wheel 56. Thereby, the corner 63 of the outer peripheral end surface 61 and the bottom surface 62 of the grinding wheel 56 is corrected to an acute angle, and the grinding performance of the grinding wheel 56 is recovered. Thus, by making the grinding wheel 56 shaped like a bite tool, the grinding performance of the tough material as with the bite tool is enhanced, and the shape correction is facilitated by the molded dressboard D.

  As described above, in the grinding method according to the present embodiment, the segment grindstone 65 is formed on the molded dressboard D in a state where the rectangular parallelepiped segment grindstone 65 is obliquely mounted on the grindstone mounting portion 76 of the wheel base 57. Dressed by. By cutting the contact end 68 of the segment grindstone 65 that contacts the molding dressboard D, the outer peripheral end face 61 and the contact end 68 are formed at an acute angle. Since the angle between the outer peripheral end surface 61 and the contact end 68 of the grinding wheel 56 depends on the inclination angle of the segment grindstone 65, the angle between the outer peripheral end surface 61 and the contact end 68 is adjusted by adjusting the inclination angle of the side surface 77 of the grindstone mounting portion 76. Can be formed at a desired angle. Further, since the outer peripheral end surface 61 is inclined with respect to the surface of the workpiece W, the workpiece W is creep-feed ground while acting on the workpiece W, so that the workpiece W is formed of a tough material. The workpiece W can be thinned well. Further, since the grinding wheel 56 is formed by bonding diamond abrasive grains with a bonding agent, the shape of the grinding wheel 56 can be corrected by the molding dressboard D even if the shape of the grinding wheel 56 deteriorates.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  For example, in the present embodiment, the configuration in which one grinding wheel 56 is disposed on the wheel base 57 of the grinding wheel 55 has been described as an example, but the present invention is not limited to this configuration. In the grinding wheel 55, two or more grinding wheels 56 may be disposed on the wheel base 57. In this case, the interval between adjacent grinding wheels 56 is wider than the circumferential width of the grinding wheel 56. It is vacated. For example, as shown in FIG. 6A, the grinding wheel 91 according to the modified example includes two pieces of grinding with the outer peripheral end face 92 facing outward at a point symmetrical position of the wheel base 94 around the rotation axis of the grinding wheel 91. A grindstone 93 may be provided. Even such a grinding wheel 91 can be manufactured by the method for manufacturing a grinding wheel according to the present embodiment. Further, by arranging a plurality of grinding wheels 93 on the grinding wheel 91, the period until the shape of each grinding wheel 93 collapses due to wear becomes longer, and the shape correction using the molding dressboard D (see FIG. 5D) is possible. The number of times can be reduced.

  In the above-described embodiment, the grinding wheel 55 for thinning the workpiece W as a whole has been described. However, the present invention is not limited to this configuration. For example, as shown in FIG. 6B, it is also possible to manufacture a grinding wheel 95 for forming a so-called TAIKO wafer in which only the outer peripheral portion of the back surface of the workpiece W1 is left and only the inside thereof is ground. In this case, each segment grindstone 97 is mounted on the wheel base 96 so that the free ends 98 of the many segment grindstones 97 are inclined outward in the rotational direction, and in this state, dressed by the molding dressboard D (see FIG. 5D). Thus, the grinding wheel 95 is manufactured. As a result, a large number of grinding wheels 99 can be provided on the wheel base 96 so as to have a skirt shape (a skirt spreading shape).

  In the above-described embodiment, the diamond abrasive grains are hardened with metal bonds to form the grinding wheel 56. However, the present invention is not limited to this configuration. The bonding agent for the grinding wheel 56 is not limited to a metal bond, and a resin bond or a vitrified bond may be used.

  Further, in the above-described embodiment, the grindstone mounting portion 76 is formed over the entire circumference with respect to the wheel base 57, but is not limited to this configuration. The grindstone mounting portion 76 may be partially formed with respect to the wheel base 57.

  As described above, the present invention has an effect that grinding performance can be easily recovered in a short time, and is particularly useful for a grinding method for grinding a workpiece formed of a tough material such as resin or metal. .

DESCRIPTION OF SYMBOLS 1 Grinding device 3 Chuck table 52 Rotating spindle 55 Grinding wheel 56 Grinding wheel 57 Wheel base 58 Fixed end of wheel base 59 Free end of wheel base 61 Outer end surface of grinding wheel 65 Segment grindstone 66 Fixed end of segment grindstone 67 Free end of segment grindstone 68 Contact end of segment grindstone 76 Grindstone mounting portion 77 Side surface of grindstone mounting portion 78 Ceiling surface of grindstone mounting portion D Molding dressboard W Workpiece

Claims (1)

A wheel base mounted on a rotary spindle having a rotary shaft and having a fixed end fixed to the rotary spindle and a free end; and an outer peripheral portion of the free end protruding from a free end surface of the free end A grinding wheel comprising a fixed grinding wheel, and a grinding wheel for producing a grinding wheel for grinding a workpiece,
A fixed end side of a rectangular parallelepiped segment grindstone in which diamond abrasive grains are bonded with a bonding agent to the outer peripheral portion of the free end portion of the wheel base, and the free end side of the segment grindstone with respect to the rotation axis is the wheel. A grindstone mounting that forms a grindstone mounting portion that includes a side surface and a ceiling surface that are tilted so as to be able to be mounted inclined and projecting outward from the outer peripheral surface of the wheel base downward from the free end of the base. Part formation step;
After performing the grinding wheel mounting portion forming step, the fixed end side of the segment grinding wheel is brought into contact with the side surface and the ceiling surface of the grinding wheel mounting portion of the wheel base, and the free end is set to the wheel base. A segment grindstone bonding step that protrudes from the free end surface of the grindstone and adheres to the grindstone mounting portion;
After performing the segment grindstone adhering step, the contact end of the segment grindstone that is held by the chuck table on the free end side of the segment grindstone is perpendicular to the rotation axis. A grinding wheel forming step in which the grinding wheel is formed by forming the outer peripheral end surface of the segment grindstone and the contact end to have an acute angle;
A method for producing a grinding wheel comprising:

Images