JPH09277143A - Grinding wheel for contouring grinding and method of contouring grinding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding wheel for contouring grinding which can attain both processing accuracy and durability. SOLUTION: This grinding wheel for contouring grinding 10 is provided with a grinding part for coarse processing 56 which constitutes a taper-shaped outer periphery grinding surface 50 and a grinding wheel part 58 for finish processing which has smaller abrasive grain than the grinding wheel part for coarse processing 56 and constitutes at least a part of cylindrical external outer periphery grinding surface 52 in a rotational center line direction. When this grinding wheel is relatively-moved in one direction to the taper-shaped outer periphery grinding surface 50 side along a prescribed contour line R while being rotated around one shaft at an ultra high peripheral speed of 100m/second or higher, one point on a material 30 to be ground is ground with the taper- shaped outer periphery grinding surface 50 of the grinding wheel part for coarse processing 56 with high wear resistance, and then with the cylindrical outer periphery grinding surface 60 of the grinding wheel part 58 for finish processing with relatively small abrasive grain. It is thus possible to attain grinding wheel durability, processing accuracy, and finish dimensional accuracy properly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grindstone used for contouring grinding for machining a work material into a predetermined contour while being fed in one direction.

[0002]

2. Description of the Related Art As a precision machining production system that requires high-precision grinding of workpieces such as dies, tools, and machine parts is shifting to a large variety of products, one machine It is desired that the board be able to flexibly handle a wide variety of products and that highly efficient grinding can be performed, and copying such as described in JP-A-6-190696 and JP-A-7-266202 is desired. A grinding machine and a copy grinding wheel used for the grinding machine have been proposed. The grinding wheel for profile grinding is a disk-shaped rotating body with a relatively thin thickness that is rotated at a relatively high speed, and moves along the desired contour line on the surface of the workpiece while being moved in one direction. It grinds and is called a grinding stone for contouring grinding or a grinding stone for contour grinding.

According to the conventional precision grinding, when grinding a plurality of types of work materials having different sizes and shapes, plunge grinding is performed by similarly preparing a plurality of types of full-form grinding wheels having different sizes and shapes. Alternatively, the surface of the work material can be cleaned by performing traverse grinding in which the grinding wheel is fed straight in one direction along a part of the surface of the work material in combination with other types of traverse grinding or plunge grinding. In contrast to the grinding process, according to the contouring grinding described above,
By moving in a direction along the contour line of the work material with a predetermined machining allowance cut, the surface of the work material can be ground by one grinder. Therefore, as compared with the case where plunge grinding is used for a relatively long work material, the work material is less deflected during grinding.
A relatively high processing accuracy can be obtained, and in comparison with the case where a plurality of types of traverse grinding or plunge grinding are used, it is not necessary to attach / detach the work material, so that there is an advantage that a relatively high processing efficiency can be obtained.

[0004]

However, the conventional grinding stone for contouring grinding used in the above-mentioned profile grinding is
The outer peripheral surface is provided with a tapered outer peripheral grinding surface and a cylindrical outer peripheral grinding surface following the tapered outer peripheral grinding surface, but since it was composed of a uniform structure in terms of abrasive grains, bond strength, and concentration, If one of durability and processing accuracy is emphasized, there is a disadvantage that the other becomes insufficient. For example, if a grindstone structure with high wear resistance, such as a grindstone structure with large abrasive grains, is used with an emphasis on the durability of the grindstone, the finished surface tends to become rough, while machining accuracy such as roundness and surface roughness is improved. If a grindstone structure with small abrasive grains is used with emphasis, wear will increase and the width dimension of the cylindrical outer peripheral grinding surface will decrease, and the cycle of the truing work for adjusting it will become shorter, further reducing productivity. Of.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a grinding stone for contouring grinding or contouring grinding which can obtain both processing accuracy and durability of the grinding stone at the same time. To provide a method.

[0006]

The first object of the present invention to achieve the above object is to provide a contouring grinding wheel of the present invention in the form of a tapered outer peripheral grinding surface and a cylindrical outer peripheral grinding surface. Having an outer peripheral grinding surface on the outer peripheral surface and being relatively moved in one direction to the tapered outer peripheral grinding surface side along a predetermined machining contour line while being rotated about one axis, with respect to the work material A contouring grinding wheel for performing grinding along the processing contour line, comprising a roughing grinding stone portion and a finishing grinding stone portion having abrasive grains smaller than the roughing grinding stone portion in a rotation axis direction. The roughening grindstone portion constitutes the tapered outer peripheral grinding surface, and the finishing grindstone portion constitutes at least a part of the cylindrical outer peripheral grinding surface.

[0007]

[Effects of the First Invention] According to the present invention, at least the rough grinding wheel forming the tapered outer peripheral grinding surface and at least the cylindrical outer peripheral grinding surface having a smaller abrasive grain than the rough grinding wheel portion. A grinding stone for contouring, which is provided with a grindstone portion for finishing that constitutes a part in the direction of the axis of rotation, is rotated around a single axis and along the predetermined contour line to the tapered outer peripheral grinding surface side. When moved relative to one direction,
At one point on the work material, after being ground on the tapered outer peripheral grinding surface of the rough grinding wheel portion with high wear resistance, the cylindrical shape of the finishing grinding stone portion with relatively small abrasive grains Since the grinding is performed on the outer peripheral grinding surface, the durability and processing accuracy of the grindstone can be suitably obtained.

[0008]

Other Embodiments of the Invention In the grinding stone for contouring grinding according to the first aspect of the present invention, preferably, the boundary surface between the roughing grinding wheel portion and the finishing grinding wheel portion is the tapered outer peripheral grinding surface. It is provided closer to the cylindrical outer peripheral grinding surface than the boundary line with the cylindrical outer peripheral grinding surface. In this way, the cylindrical outer peripheral grinding surface made up of the grinding wheel portion for finishing does not decrease even if the wear of the outer peripheral surface progresses, and the tapered outer peripheral grinding surface that recedes due to abrasion becomes the grinding stone portion for finishing. Since truing is not necessary until reaching the cylindrical outer peripheral grinding surface,
There is an advantage that contouring grinding with good processing accuracy can be obtained for a long time.

Preferably, the grindstone portion for roughing is
It has a thickness in the direction of the axis of rotation that is greater than that of the finishing grindstone portion. By doing so, there is an advantage that the width dimension of the tapered outer peripheral grinding surface is set large, and higher durability of the grindstone can be obtained.

Preferably, the grindstone portion for roughing is
The degree of bonding or concentration is larger than that of the finishing grindstone portion. By doing so, the abrasion of the roughing grindstone portion is further reduced as compared with that of the finishing grindstone portion, the truing cycle is further lengthened, and the productivity is enhanced.

Further, preferably, the abrasive grains of the roughening grindstone portion and the finishing grindstone portion are diamond abrasive grains or CBN abrasive grains, and the abrasive grains are an inorganic binder,
It is bound by a binder such as a thermosetting resin binder or a metal bond.

[0012]

A second aspect of the present invention for achieving the above object is to provide a contouring grinding method according to the present invention. A contouring grinding method for grinding an outer peripheral surface of a workpiece to be rotated, wherein the cylindrical outer peripheral grinding surface of the finishing grindstone portion passes through a point on the outer peripheral surface of the workpiece. This is to include the step of rotationally driving the work material at a rotation speed at which the work material is rotated a predetermined number of times or more.

[0013]

[Effects of the Second Invention] According to this structure, the work material is rotated a predetermined number of times or more while the cylindrical outer peripheral grinding surface of the finishing grindstone portion passes through one point on the work material. Since the work material is rotationally driven at the rotational speed, sufficient machining accuracy can be obtained. Further, when the number of rotations is set to a number such that the machining precision is necessary and sufficient, such as 3 times, the tapered outer peripheral grinding surface that recedes due to wear is the cylindrical outer periphery of the finishing grindstone portion. Since the truing is easily determined on the basis of reaching the ground surface, there is an advantage that it is not necessary to measure skill or processing accuracy for determining the start of the truing operation.

[0014]

A third aspect of the present invention for attaining the above object is to provide a contouring grinding method according to the present invention. A contouring grinding method for grinding an outer peripheral surface of a workpiece to be rotated, wherein the cylindrical outer peripheral grinding surface of the finishing grindstone portion passes through a point on the outer peripheral surface of the workpiece. This is to include a step of moving the contouring grinding wheel relative to the work material at a moving speed at which the work material rotates a predetermined number of times or more.

[0015]

[Effects of the third invention] With this configuration, the work material is rotated a predetermined number of times or more while the cylindrical outer peripheral grinding surface of the grinding stone portion for finishing passes through one point on the work material. Since the contouring grinding wheel is moved relative to the work material at the moving speed, sufficient processing accuracy can be obtained. Further, when the number of rotations is set to a number such that the machining precision is necessary and sufficient, such as 3 times, the tapered outer peripheral grinding surface that recedes due to wear is the cylindrical outer periphery of the finishing grindstone portion. Since the truing is easily determined on the basis of reaching the ground surface, there is an advantage that it is not necessary to measure skill or processing accuracy for determining the start of the truing operation.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a main part of a contouring grinding device 12 equipped with a grinding stone for contouring grinding (hereinafter referred to as a grinding stone) 10 according to an embodiment of the present invention. In the figure, the work support table 14 is provided on a base 16 so as to be guided by an X-direction guide groove 18 so as to be movable in the X-direction, and is driven and positioned in the X-direction by an X-direction drive motor 20. It has become so. And
A tailstock 2 having a headstock 24 and a center 26, which internally include a speed reducer and a drive motor for driving the spindle 22.
8 is provided on the work support table 14,
The stepped cylindrical work material 30 is rotated in one rotation direction A while both ends thereof are rotatably supported by the main shaft 22 and the center 26 so that their axes are parallel to the X direction. It has become.

Further, the grindstone support table 34 has a base 16
It is provided so as to be movable in the Y direction by the Y direction guide groove 36 on the upper side.
8 drives and positions in the Y direction. A grindstone drive motor 40 that rotatably supports and rotationally drives the grindstone 10 is provided on the grindstone support table 34, and the grindstone 10 is attached to the output shaft of the grindstone drive motor 40 so that its center It is configured to be moved in the Y direction while being rotated in one direction B around the axis at an ultrahigh speed rotation of a peripheral speed of 100 m / sec or more, for example.

The control unit 44 controls the X-direction drive motor 20 and the Y-direction drive motor 38 so that the grinding point of the grindstone 10, that is, the contact point with the work material 30, becomes a preset contour line after machining. The grindstone 10 is relatively moved in one direction with respect to the work material 30 so as to follow. This gives 1
The surface of the work material 30 is ground by a predetermined shape dimension and a predetermined surface roughness by one movement operation (one pass) of the grindstone 10. The control device 44 is composed of, for example, a well-known NC control device for performing numerical control, and the X-direction drive motor 20 and the Y-direction drive motor 38 are electrically or hydraulically driven and controlled by the NC control device, for example. It is composed of a pulse motor.

The grindstone 10 has an outer diameter of 380 mm, for example.
It has a relatively thin disc shape of φ and a thickness of about 8 mm, and is configured as shown in FIG. In FIG. 2, the grindstone 10 is
For example, the taper angle 2 set within the range of 2 to 45 degrees
The tapered outer peripheral grinding surface 50 having α and the cylindrical outer peripheral grinding surface 52 following the tapered outer peripheral grinding surface 50 are provided in the width direction of the outer peripheral surface, and the tapered outer peripheral grinding surface 50 is the grindstone 10.
1 is located on the relative movement direction side, that is, on the X (positive) direction side in FIG.

The grindstone 10 has a metal core portion 5
4, a roughing grindstone portion 56 fixed to the outer peripheral surface of No. 4 and a finishing grindstone portion 58 having smaller abrasive grains than the roughing grindstone portion 56 are provided in the rotation axis direction, that is, the thickness direction of the grindstone 10. The tapered outer peripheral grinding surface 50 is constituted by the roughing grindstone portion 56, and a part of the cylindrical outer peripheral grinding surface 52 on the rear side in the relative movement direction is constituted by the finishing grindstone portion 58. There is. That is,
A boundary surface C between the roughing grinding wheel portion 56 and the finishing grinding wheel portion 58 has a tapered outer peripheral grinding surface 50 and a cylindrical outer peripheral grinding surface 5.
A cylindrical outer peripheral grinding surface 60, which is provided on the cylindrical outer peripheral grinding surface 52 side with respect to the boundary line 2 between the two, that is, on the rear side in the relative movement direction of the grindstone 10, and is configured only by the finishing grindstone portion 58. Is about 4/5 to 1/5 of the cylindrical outer peripheral grinding surface 52 and 1/2 of the entire width of the outer peripheral grinding surface (width of the tapered outer peripheral grinding surface 50 and the cylindrical outer peripheral grinding surface 52).
It is made sufficiently small so that the width dimension is about 1/10.

In the roughing grindstone portion 56 and the finishing grindstone portion 58, a superabrasive grain such as a diamond grain or a CBN grain is an inorganic binder known as a vitrified bond, a metal binder known as a metal bond, Each is composed of a grindstone structure that is bound by a binder such as an organic binder known as resinoid bond. The abrasive grains of the roughing grindstone portion 56 have, for example, a grain size of 60.
On the other hand, the abrasive grains of the finishing grindstone portion 58 are, for example, CBN abrasive grains having a grain size of 80/100, and the abrasion resistance of the roughing grindstone portion 56 is for finishing. In addition to being increased with respect to the whetstone portion 58, the finishing ability with respect to the surface roughness of the finishing whetstone portion 58 is increased with respect to the roughing whetstone portion 56.

Further, in the above grindstone 10, the degree of bonding and concentration of the abrasive grains are set so that the abrasion resistance of the roughing grindstone portion 56 is higher than that of the finishing grindstone portion 58. For example, the abrasive grains of the rough-working grindstone portion 56 are bonded with, for example, the bond degree N, while the abrasive grains of the finish-working grindstone portion 58 are bonded with, for example, the bond degree M. Further, while the abrasive grains of the grindstone portion 56 for rough machining are set to have a concentration degree (concentration) of 200, for example,
The abrasive grains of the above-mentioned finishing grindstone portion 58 have, for example, a concentration of 1
It is said to be 80. That is, the roughing grindstone portion 56 is C
It is composed of B60N200V and the finishing grindstone part 58 is composed of CB80M180V.
The roughing grindstone portion 56 and the finishing grindstone portion 5
8 are made integral with each other by being pressed in a common mold, for example, in the molding process, and then sintered integrally.

In the contouring grinding device 12 having the above-described structure, an operator operates a machining start operation button (not shown) while the work material 30 is set between the spindle 22 and the center 26. When the grindstone 10 is rotationally driven at an ultrahigh speed rotation of a peripheral speed of 100 m / sec or more, the grinding point of the grindstone 10, that is, the contact point with the work material 30, is preset as shown by the one-dot chain line. The grindstone 10 is relatively moved in one direction with respect to the work material 30 by the control device 44 along the contour line R after the machining. When the grinding point of the grindstone 10 reaches the end of the contour line R, the surface of the work material 30 is ground and finished along the contour line R, and the grindstone 10 is relatively moved to the original position. .

Here, the rotational speed of the work material 30 and the relative movement speed of the grindstone 10 are 1 times the outer peripheral surface of the work material 30.
While the cylindrical outer peripheral grinding surface 60 made of the finishing grindstone portion 58 of the grindstone 10 passes through the point (line), sufficient finishing accuracy or surface roughness must be guaranteed and the number of preset times is sufficient. For example, the work material 30 is set to a value that allows the work material 30 to rotate three or more times, and the control device 44 rotates the work material 30 at such a rotation speed or rotationally drives the grindstone 10 at such a relative movement speed. And the contour line R
Relative movement along.

In contouring grinding, which requires finishing dimensional accuracy of roundness of 3 μm or less and surface roughness of Rmax of 3 μm or less, according to experiments by the present inventors, the above-mentioned grindstone 10 was used. Contouring grinding device 12
Then, as shown in FIG. 3 and FIG. 4, the machining is performed while one point (line) on the surface of the work material 30 is passed by the cylindrical outer peripheral grinding surface 60 formed of the grinding stone portion 58 for finishing of the grinding stone 10. Rotation speed of the work material 30 such that the number of rotations of the work material 30, that is, the number of spark outs (width dimension of the cylindrical outer peripheral grinding surface 60 / movement amount of the grindstone 10 per one rotation of the work material 30) is at least three times. And the relative moving speed of the grindstone 10 is required.

FIG. 5 shows the surface roughness Rmax when using the contouring grinding device 12 in which the rotation speed of the work material 30 and the relative movement speed of the grindstone 10 are set as described above.
The changes in roundness and grinding amount over time are shown. FIG.
As shown in FIG. 3, the circularity of the three types of change characteristics first exceeds the required accuracy of 3 μm. Therefore, when the circularity exceeds the required accuracy of 3 μm, the grinding stone 10 is trued. There is a need. However, one point (line) on the surface of the work material 30 is used for the finishing grindstone portion 58 of the grindstone 10.
Number of rotations of the work material 30 during the passage of the cylindrical outer peripheral grinding surface 60 consisting of, ie, spark out times (width dimension of the cylindrical outer peripheral grinding surface 60 / movement amount of the grindstone 10 per one rotation of the work material 30) However, the number of times necessary and sufficient to satisfy the required accuracy of contouring grinding, that is, 3 in this embodiment.
When the contouring grinding is performed at the rotational speed of the work material 30 or the relative movement speed of the grindstone 10 that causes the rotation,
At the same time that the highest machining accuracy is obtained, the tapered outer peripheral grinding surface 50 that recedes with the increase in the number of grinding operations reaches the boundary surface C between the roughing grinding wheel portion 56 and the finishing grinding wheel portion 58. The truing can be easily judged visually.

As described above, according to the present embodiment, the roughing grindstone portion 56 forming the tapered outer peripheral grinding surface 50 and the cylindrical outer circumferential grinding having smaller abrasive grains than the roughing grinding stone portion 56. The contouring grindstone 10 provided with the finishing grindstone portion 58 forming at least a part of the surface 52 in the direction of the rotation axis is rotated around one axis at an ultrahigh speed rotation of a peripheral speed of 100 m / sec or more. When being relatively moved in one direction along the predetermined contour line R toward the tapered outer peripheral grinding surface 50 while being made to move, at one point on the work material 30, the grinding wheel portion 56 for rough machining having high wear resistance is formed. After the grinding is performed on the tapered outer peripheral grinding surface 50, subsequently, the grinding is performed on the cylindrical outer peripheral grinding surface 60 of the finishing grindstone portion 58 in which the abrasive grains are relatively small. Alternatively, finishing dimensional accuracy can be obtained appropriately

Further, according to the grindstone 10 of the present embodiment, the boundary surface C between the roughing grindstone portion 56 and the finishing grindstone portion 58.
However, since it is provided closer to the cylindrical outer peripheral grinding surface 60 than the boundary line D between the tapered outer peripheral grinding surface 50 and the cylindrical outer peripheral grinding surface 52, it is for finishing even if the outer peripheral surface is worn. The width dimension of the cylindrical outer peripheral grinding surface 60 composed of the grindstone portion 58 does not decrease, and the tapered outer peripheral grinding surface 5 recedes due to wear.
Since no truing is required until 0 reaches the cylindrical outer peripheral grinding surface 60 formed of the finishing grindstone portion 58, there is an advantage that contouring grinding with good processing accuracy can be obtained for a long time.

Further, according to the grindstone 10 of the present embodiment, the roughing grindstone portion 56 has a larger thickness in the direction of the rotational axis than the finishing grindstone portion 58, that is, the width dimension. The width dimension of the outer peripheral grinding surface 50 is set large, and there is an advantage that higher productivity can be obtained.

Further, according to the grindstone 10 of the present embodiment, since the roughing grindstone portion 56 has a larger degree of coupling or concentration than the finishing grindstone portion 58, the roughing grindstone portion 56 of the roughing grindstone portion 56 is larger. The wear is further reduced than that of the finishing grindstone portion 58, the truing cycle is further lengthened, and the productivity is improved.

Further, in the contouring grinding device 12 of the above-described embodiment, the work material 30 is contoured while the cylindrical outer peripheral grinding surface 60 of the finishing grindstone portion 58 passes through one point on the work material 30. Since the contouring grinding method including the step of rotationally driving the work material 30 at a rotation speed for rotating the work material 30 at least a predetermined number of times that is necessary and sufficient to satisfy the required accuracy of ring grinding is used, sufficient machining is performed. Accuracy can be obtained. Further, for example, when the number of rotations is set to a predetermined number of times (three times) that is necessary and sufficient to satisfy the required accuracy of contouring grinding, the tapered outer peripheral grinding surface 50 that recedes due to wear is finished as described above. Since the truing can be easily visually determined on the basis of reaching the cylindrical outer peripheral grinding surface 60 of the grinding wheel portion 58, there is an advantage that it is not necessary to measure the skill or the processing accuracy in determining the truing operation start.

Further, in the contouring grinding device 12 of the above-described embodiment, the work material 30 is contoured while the cylindrical outer peripheral grinding surface 60 of the finishing grindstone portion 58 passes through one point on the work material 30. Contouring grinding including a step of relatively moving the contouring grinding wheel 10 with respect to the work material 30 at a moving speed that rotates a predetermined number of times that is necessary and sufficient to satisfy the required accuracy of ring grinding. Since the method is used, sufficient processing accuracy can be obtained. Also,
For example, a predetermined number of rotations (3
When set to (twice), the truing can be easily visually determined on the basis that the tapered outer peripheral grinding surface 50 that recedes due to wear reaches the cylindrical outer peripheral grinding surface 60 of the finishing grindstone portion 58. There is an advantage that it does not require skill or measurement of processing accuracy for determining the start of a truing operation.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the present invention can be carried out in other modes.

For example, in the contouring grinding device 12 of the above-described embodiment, the work piece 30 is driven in the X direction and the grindstone 10 is driven in the Y direction, so that the grinding point of the grindstone 10 has a predetermined contour line R. It was moved relatively along
The work material 30 or the grindstone 10 may be configured to be moved in the X direction and the Y direction.

In the grindstone 10 of the above-described embodiment, the roughing grindstone portion 56 and the finishing grindstone portion 58.
Abrasive grains are diamond abrasive grains or CBN abrasive grains,
Further, the abrasive grains are an inorganic binder, a thermosetting resin binder,
Although they were bonded by a binder such as a metal bond, other types of abrasive grains such as fused alumina-based abrasive grains and silicon carbide-based abrasive grains and other types of binders may be used.

Further, in the grindstone 10 of the above-mentioned embodiment,
The roughing grindstone portion 56 and the finishing grindstone portion 58 are configured to have mutually different colors by using different materials for the abrasive grains or the binder, or by coloring the binder. May be done. In this way, the boundary surface C between the roughing grindstone portion 56 and the finishing grindstone portion 58 becomes clearer, so that the tapered outer peripheral grinding surface 50 is formed.
Has an advantage that it can be more easily visually determined that the boundary surface C has reached the boundary surface C.

Further, in the grindstone 10 of the above-mentioned embodiment,
The interface C between the roughing grindstone portion 56 and the finishing grindstone portion 58 may be a mixture of mutual components in a predetermined range such that the content ratio of one component is inclined. .

Further, in the grindstone 10 of the above-mentioned embodiment,
The roughing grindstone portion 56 and the finishing grindstone portion 58 are
Although they were molded and sintered integrally with each other in the manufacturing stage, they may be bonded to each other after molding and sintering.

The above description is merely one embodiment of the present invention, and the present invention can be variously modified without departing from the spirit thereof.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a configuration of a contouring grinding apparatus including a contouring grinding wheel that is an embodiment of the present invention.

FIG. 2 is a partially cutaway view illustrating an enlarged configuration of an outer peripheral portion of a contouring grinding wheel provided in the contouring grinding apparatus of the embodiment of FIG.

FIG. 3 is a diagram showing the relationship between the number of spark-outs and the surface roughness of a cylindrical outer peripheral grinding surface made up of a grinding stone portion for finishing in the grinding stone for contouring grinding shown in FIG.

FIG. 4 is a diagram showing a relationship between the number of spark-outs and roundness of a cylindrical outer peripheral grinding surface composed of a finishing grindstone portion in the contouring grinding grindstone of FIG. 2;

5 is a grinding amount in the contouring device of FIG.
It is a figure which shows the relationship between surface roughness, circularity, and the width dimension of a cylindrical outer peripheral grinding surface.

[Explanation of symbols]

 10: Whetstone for contouring grinding 12: Contouring grinding device 50: Tapered outer peripheral grinding surface 52: Cylindrical outer peripheral grinding surface 56: Roughing grindstone part 58: Finishing whetstone part 60: Finishing whetstone part Cylindrical outer peripheral grinding surface

Front page continuation (72) Inventor Toshimichi Nakagawa Noritake Company Limited No. 1-33 No. 36, Noritake Shinmachi, Nishi-ku, Nagoya City, Aichi Prefecture

Claims (7)

[Claims] 1. A tapered outer peripheral grinding surface and a cylindrical outer peripheral ground surface following the tapered outer peripheral grinding surface are provided on the outer peripheral surface, and the taper shape is provided along a predetermined machining contour line while being rotated about one axis. A contouring grindstone that grinds a work material along a machining contour line by being relatively moved in one direction to the outer peripheral grinding surface side. A grinding stone portion for finishing with smaller abrasive grains than the grinding stone portion for grinding is provided in the direction of the rotation axis, and the tapered outer peripheral grinding surface is constituted by the grinding stone portion for roughing, and the cylindrical shape is formed by the grinding stone portion for finishing. A grinding wheel for contouring grinding, characterized in that at least a part of the outer peripheral grinding surface is constituted. 2. A boundary surface between the roughing grindstone portion and the finishing processing grindstone portion is closer to the cylindrical outer peripheral grinding surface than the boundary line between the tapered outer peripheral grinding surface and the cylindrical outer peripheral grinding surface. The grindstone for contouring grinding according to claim 1, wherein the grindstone is provided in the. 3. The whetstone for contouring grinding according to claim 1, wherein the roughing grindstone portion has a greater thickness in the direction of the rotation axis than the finishing grindstone portion. 4. The grinding stone for contouring grinding according to any one of claims 1 to 3, wherein the roughing grindstone portion has a larger degree of coupling than the finishing grindstone portion. 5. The contouring grindstone according to claim 1, wherein the roughing grindstone has a greater degree of concentration than the finishing grindstone. 6. A contouring grinding method for grinding the outer peripheral surface of a work material rotated about one axis, using the contouring grinding wheel according to claim 1 or 2, wherein the outer peripheral surface of the work material is A step of rotating and driving the work material at a rotation speed at which the work material rotates a predetermined number of times or more while the cylindrical outer peripheral grinding surface of the finishing grindstone portion passes through one point above; And a contouring grinding method comprising: 7. A contouring grinding method for grinding the outer peripheral surface of a work material rotated about one axis using the contouring grinding wheel according to claim 1 or 2, wherein the outer peripheral surface of the work material The contouring grindstone is cut at a moving speed at which the work material rotates a predetermined number of times or more while the cylindrical outer peripheral grinding surface of the finishing grindstone portion passes one point above. A contouring grinding method comprising a step of relatively moving the material.