JP2003080447A - Grinding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grinding method which can perform work of multifarious ground surfaces of a single workpiece by one set of work machine. SOLUTION: A disc 100 fixed by a chuck 31 is rotated, and while rotating a grinding wheel 1, a first grinding wheel surface having a prescribed angle is moved in a direction of arrow mark A in a direction in parallel to an external peripheral surface 103 of the disc 100 further from out of the external peripheral surface, the external peripheral surface 103 is ground, successively while maintaining the rotation of the disc 100, a second grinding wheel surface 12 having a prescribed angle is moved in a direction of arrow mark B in a direction in parallel to one end face 101 of the disc 100 further from out of the end face, the end face 101 of the disc 100 is ground.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a grinding method.

[0002]

2. Description of the Related Art Grinding is used in the processing of various parts. For example, a disk of a toroidal type continuously variable transmission is also formed by grinding the disk surface after rough processing.

In the conventional grinding process of the disk surface, first,
As shown in FIG. 12A, the roughly processed disk 100, which is a workpiece, is fixed on a table of a surface grinder using, for example, a magnet chuck, a vacuum chuck (not shown), and the grindstone 50. The one end surface 101 is ground by making a notch while moving in parallel with the one end surface 101 of the disk.

Next, as shown in FIG. 12 (b), the machined one end surface 101 is used as a reference for fixing on a table, and similarly, a surface grinder and a grindstone 50 are used to form the opposite end surface 10 as well.
Process 2.

Further, as shown in FIG. 12 (c), a disk 10 having both end surfaces processed on a cylindrical grinder (not shown).
0 is rotatably fixed so as to be perpendicular to the processed end surface, and the outer peripheral surface 103 is ground.

Subsequently, as shown in FIG. 12 (d), a disc 100 rotatably supported by another cylindrical grinder (inner surface grinder) with the outer peripheral surface 103 and the end surface 101 (or 102) as a reference. The inner diameter hole is ground using the inner diameter grindstone 51.

Finally, as shown in FIG. 12 (e), the disc 100 is rotatably fixed to an angular grinder, and the rolling surface 104 of the disc 100 having an arcuate cross section is sized to match the arcuate cross section. It is processed by plunge feed all-round grinding using a grindstone of the shape.

[0008]

However, in such a conventional grinding method, several kinds of processing machines are required for each surface to be ground with respect to a disk which is one workpiece. However, since it is necessary to attach and detach each time the grinding surface is changed, the process is lengthened, resulting in an increase in manufacturing cost.

[0009] Further, during the course of several steps, the disk is mounted on and removed from the processing machine, so that an installation error inevitably occurs, which makes it difficult to maintain the processing accuracy. There was a problem.

Therefore, an object of the present invention is to provide a grinding method capable of processing various surfaces to be ground of one workpiece with one processing machine.

[0011]

The object of the present invention is achieved by the following constitutions.

(1) In a grinding method of grinding a surface to be ground of a workpiece with a grindstone, the workpiece is rotated and the outer peripheral surface extends from the outer peripheral surface extending parallel to the outer peripheral surface of the workpiece. To a step of bringing the outer peripheral surface of the grindstone closer to the outer peripheral surface at a predetermined angle to grind the outer peripheral surface, and continuously rotating the workpiece. From the outside of the end surface extending parallel to the surface direction of the workpiece to the end surface direction from the second grindstone surface forming a predetermined angle with respect to the end surface provided on the grindstone. And a step of grinding the end face.

(2) The relative movement loci of the grindstone and the workpiece are continuous from the start of the step of grinding the outer peripheral surface to the end of the step of grinding the end surface. .

(3) In a grinding method for grinding a surface to be ground of a work piece with a grindstone, the work piece is rotated, and the work piece is rotated from the outer peripheral surface extending parallel to the surface direction from the outer peripheral surface. The step of bringing the outer peripheral surface closer to the outer peripheral surface provided on the grindstone from a third grindstone surface forming a predetermined angle, and grinding the outer peripheral surface, and rotating the workpiece. As it is, the cross-section arc-shaped portion of the work piece is moved from outside the cross-section arc-shaped portion to the cross-section arc-shaped portion, and the cross-section of the grindstone is an arc having a local radius smaller than the radius of the cross-section arc-shaped portion And a step of moving the fourth grindstone surface forming the section along the arc of the arcuate section-shaped portion to grind the arcuate section-shaped section.

(4) The relative movement loci of the grindstone and the workpiece are continuous from the start of the step of grinding the outer peripheral surface to the end of the step of grinding the cross-section arc-shaped portion. It is characterized by being

(5) The work piece is a disk of a toroidal type continuously variable transmission.

(6) The work piece is a power roller of a toroidal type continuously variable transmission.

[0018]

The present invention has the following effects for each claim.

According to the first aspect of the present invention, with respect to each of the outer peripheral surface and the end surface to be ground, the grindstone surfaces forming a predetermined angle with respect to the surface to be ground are brought close to each other in a direction parallel to the surface to be ground. Since grinding is performed, once the workpiece is set in the processing machine, the outer peripheral surface and the end surface can be continuously ground. Therefore, since it is not necessary to prepare different equipment for each surface to be ground, the number of processing machines can be reduced, the capital investment cost can be reduced, the space can be saved, and the manufacturing cost can be reduced. Furthermore, since the number of times the work piece is attached and removed is reduced,
The working time can be shortened, and further, the deterioration of the machining accuracy due to the mounting error is reduced.

According to the second aspect of the present invention, the relative movement loci of the grindstone and the workpiece are continuous from the start of the step of grinding the outer peripheral surface to the end of the step of grinding the end surface. Therefore, the cycle time required for processing can be further shortened.

According to the third aspect of the present invention, the third grindstone surface forms a predetermined angle with the outer peripheral surface to be ground, and the fourth grindstone surface having a local radius smaller than the radius of the arcuate section. The outer peripheral surface of the object to be ground is ground in a direction parallel to this surface by grinding, and the arc-shaped cross-section portion moves the fourth grindstone surface along the arc of the cross-section to perform grinding processing. Therefore, once the workpiece is set in the processing machine, it is possible to continuously grind the outer peripheral surface and the arcuate cross section. Therefore, since it is not necessary to prepare different equipment for each surface to be ground, the number of processing machines can be reduced, the capital investment cost can be reduced, the space can be saved, and the manufacturing cost can be reduced. Furthermore, attach the work piece,
Since the number of times of removal is reduced, the working time can be shortened, and further, the deterioration of the processing accuracy due to the mounting error is reduced.

According to the present invention, the relative movement loci of the grindstone and the workpiece are continuous from the start of the step of grinding the outer peripheral surface to the end of the step of grinding the arcuate section. By doing so, the cycle time required for processing can be further shortened.

According to the fifth aspect of the present invention, since the disk of the toroidal type continuously variable transmission is machined as the work piece, like the disk of the toroidal type continuously variable transmission, the outer peripheral surface and the flat surface are flattened. Since it is possible to grind various end surfaces and various shapes such as rolling surfaces having an arc-shaped cross section with a single processing machine, the manufacturing cost of the disk of the toroidal type continuously variable transmission is reduced. It becomes possible.

According to the sixth aspect of the present invention, the power roller of the toroidal type continuously variable transmission is machined as the work piece. Therefore, like the power roller of the toroidal type continuously variable transmission, the outer peripheral surface is processed. Since it becomes possible to grind a member having a surface having an arcuate cross section with one processing machine, it is possible to reduce the manufacturing cost of the power roller of the toroidal type continuously variable transmission.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In each figure, members having the same functions as those shown in FIG. 12 described as the conventional example are designated by the same reference numerals, and the description thereof will be omitted. Further, in each of the drawings, members having the same function are designated by the same reference numerals.

(First Embodiment) FIG. 1 is a diagram showing the structure of an apparatus for carrying out a grinding process in the first embodiment to which the present invention is applied, and FIG. 2 is a diagram showing the first embodiment. It is drawing which shows the shape of the grindstone used for the form. In addition, in FIG. 2, (a) is a front view of the grindstone, (b) is a cross-sectional view taken along the line AA, and (c) is an enlarged view within a dotted circle in (b). Further, FIG. 3 is a drawing for explaining the processing method of the first embodiment.

The processing machine used in the first embodiment is a grindstone 1 having a plurality of continuous grindstone surfaces, and a grindstone head 20 that rotates by mounting the grindstone 1 on its rotary shaft 21.
A head moving mechanism 22 for moving the grindstone head 20 in the direction of the disk 100, which is the object to be processed, and rotation for fixing the disk 100 rotatably and moving it in a direction (direction A in the drawing) perpendicular to the grindstone rotating direction. Grinding machine 30,
Equipped with.

The rotary grinding machine 30 has a chuck 31 for fixing the disc 100 and a motor 32 for rotating the disc 100 fixed by the chuck 31.
And a moving mechanism 33 for reciprocating the disk 100 in the direction A in the drawing.

A motor (not shown) is housed in the grindstone head 20 and the rotary shaft 21 to which the grindstone 1 is attached.
To rotate. The head moving mechanism 22 and the disk moving mechanism 33 are, for example, a rack and pinion or a feed screw.

As shown in FIG. 2, the grindstone 1 has a disc shape, and an abrasive grain layer is fixed to the outer periphery of the core 10 (or the whole is made of the abrasive grain layer). Is different from the first whetstone surface 12 and a first outer whetstone surface 11 that is flat and a first whetstone surface 12 that is inclined at a predetermined angle with respect to the outer whetstone surface 11 and that is flat in the disk center direction. It has a second grindstone surface 13 that is inclined toward the center of the disk at an angle and is flat in the slanting direction, and a front grindstone surface 14 that is perpendicular to the outer peripheral grindstone surface 11 following the second grindstone surface 13.

Next, with reference to FIG. 3, a disk grinding method according to the first embodiment will be described.

First of all, the disk 100 is provided with an inner diameter portion 1 thereof.
05 is fixed from the end face 102 side by the chuck 31 (see FIG. 1).

While the disk 100 fixed by the chuck 31 is rotated and the grindstone 1 is rotated, the first grindstone surface 12 is in a direction parallel to the outer peripheral surface 103 of the disk 100 and from outside the outer peripheral surface. Disc 100
The disk moving mechanism 33 is operated so that the disk moving mechanism 33 moves closer to the outer peripheral surface 103 and moves along the outer peripheral surface 103 (solid line in the figure).

As a result, the grindstone 1 moves relative to the disc 100 in the direction of arrow A shown in FIG. 3, and the outer circumference of the disc 100 is made by the first grindstone surface 12 and the outer peripheral grindstone surface 11. The surface 103 is ground.

Subsequently, while the rotation of the disc 100 is maintained, the disc moving mechanism 33 moves the disc position backward, and then the second grindstone is moved in the direction parallel to the one end face 101 of the disc 100 and from the outside of the end face. The head moving mechanism 22 is operated so that the surface 13 approaches the disk 100 and further moves along the end surface 101 (two-dot chain line in the figure).

As a result, the grindstone 1 moves relative to the disk 100 in the direction of arrow B shown in FIG. 3, and the end surface of the disk 100 is moved by the second grindstone surface 13 and the front grindstone surface 14. 101 is ground.

Here, the reason why each of the first grindstone surface 12 and the second grindstone surface 13 is angled with respect to the surface to be ground will be described.

In the first embodiment, the grinding process is performed by moving the grindstone closer to and outside the grinding surface and in the direction parallel to the surface to be ground. This is so that the two surfaces can be processed without replacing the disk once fixed. Here, if a grindstone that does not have an angle to the surface to be ground is used to move the grindstone as in the first embodiment, for example, if a grindstone that is perpendicular to the surface to be ground is used, Since the notch is applied from the direction parallel to the surface, a large force is applied to the grindstone in the moving direction relative to the surface to be ground. For this reason, the abrasion of the grindstone increases, and in the worst case, the grindstone breaks.

On the other hand, as in the first embodiment, by providing an angle to the portion close to the surface to be ground,
The incisions are gradually formed, and no great force is applied to the grindstone or the disk that is the object to be processed, so that the grinding can be performed well.

It is preferable that the angle with respect to the surface to be ground is such that the corners do not meet at right angles to the surface to be ground when moving parallel to the surface to be ground. This includes, for example, the first
2C has an elevation angle θ1 of 3 ° to 30 ° with respect to the direction parallel to the surface to be ground shown in FIG.
It is preferable that the elevation angle θ2 with respect to the direction parallel to the surface to be ground shown in FIG. 2 (c) is similarly 3 ° to 30 °.

On the first grindstone surface 12, if the angle exceeds 30 °, the angle becomes excessively high and the friction when moving parallel to the surface to be ground is not reduced, which is not preferable. On the other hand, when the angle is less than 3 °, the angle is too shallow, so that the allowance portion L (see FIG. 2 (c)) that can be ground on the inclined surface becomes small and the non-inclined portion contacts the surface to be ground, or In order to obtain a sufficient inclined surface to avoid it, the size of the first grindstone surface must be increased, which is not preferable because the entire grindstone becomes large. Similarly, on the second grindstone surface, 3
If the angle exceeds 0 °, the angle will be excessive and the friction when moving parallel to the surface to be ground will not decrease, which is not preferable.
If it is less than the above range, the angle is too shallow, so that the non-inclined part hits the surface to be ground or the entire grindstone becomes large, which is not preferable.

As described above, in the first embodiment, once the disc is fixed, one end face can be ground together with the outer peripheral face of the disc. Also, like this,
Even if the surfaces to be ground are different, it is not necessary to attach and detach the disk, which is the workpiece, so that the processing accuracy of the outer peripheral surface and the end surface (particularly the right angle in this case) is improved.

Further, since the first embodiment is characterized by the shape of the grindstone and the relative moving direction of the grindstone and the disk, the apparatus used should have the same mechanism as the conventional cylindrical grinder. Can be used if Therefore, if there is only one conventional grinding machine as a processing machine, it is possible to easily shorten the processing process and improve the processing accuracy by using this.

(Second Embodiment) FIG. 4 is a view showing the shape of a grindstone used in the second embodiment to which the present invention is applied. In FIG. 4, (a) is a front view of the grindstone. , (B)
Is a cross-sectional view taken along the line BB, and (c) is an enlarged view within a dotted circle in (b). Further, FIG. 5 is a drawing for explaining the processing method of the second embodiment.

The second embodiment is different from the above-described first embodiment in the shape of the grindstone used, and only the movement locus of the grindstone in the working process is different. This is the same as the first embodiment described above.

Grinding stone 2 used in the second embodiment
As shown in FIG. 4, is a disk shape, and an abrasive grain layer is fixed to the outer periphery of the core 10 (or is made entirely of the abrasive grain layer), and the outer peripheral portion of the outer peripheral surface of the disc is flat in the thickness direction. Wheel surface 1
1 and a first grindstone surface 12 which is inclined with respect to the outer peripheral grindstone surface 11 at a predetermined angle in the disk center direction and which is flat in the tilt direction
And a second grindstone surface 13 which is inclined from the outer peripheral grindstone surface 11 toward the center of the disc at a predetermined angle and is flat in the slanting direction, and a front surface which is continuous with the second grindstone surface 13 and is perpendicular to the outer peripheral grindstone surface 11. It has a grinding wheel surface 14.

The first grindstone surface 12 and the second grindstone surface 13 preferably have the same angles as those in the first embodiment.

Next, with reference to FIG. 5, a disk grinding method according to the second embodiment will be described.

First, similarly to the first embodiment, the disc 100 is fixed from the end face 102 side by the chuck 31.

Then, while rotating the disk 100 fixed by the chuck 31 and rotating the grindstone 2, the first grindstone surface 12 is in a direction parallel to the outer peripheral surface 103 of the disk 100 and from the outer peripheral surface. Disc 100
The disk moving mechanism 33 is operated so that the disk moving mechanism 33 approaches and moves to the position (solid line in the figure).

As a result, the grindstone 2 moves in the direction of arrow A shown in FIG. 5 relative to the disc 100, and the outer circumference of the disc 100 is made by the first grindstone surface 12 and the outer peripheral grindstone surface 11. The surface 103 is ground.

Then, while maintaining the rotation of the disk 100, in a direction parallel to the end surface 101 and from the outside of the end surface,
The head moving mechanism 22 is operated so that the second grindstone surface 12 moves closer to the disk 100 (two-dot chain line in the figure).

As a result, the grindstone 2 moves in the direction of arrow B shown in FIG. 5 relative to the disc 100, and the outer circumference of the disc 100 is made by the second grindstone surface 12 and the front grindstone surface 14. The surface 103 is ground.

As described above, in the second embodiment, as the grindstone 2 to be used, the inclined first grindstone surface 12 and the second grindstone surface 13 are provided on both sides of the outer peripheral grindstone surface 11. After grinding the outer peripheral surface 103, the one end surface 102 of the disk 100 is ground.
Since the relative movement loci of 0 and the grindstone 2 are continuous, the cycle time required for processing can be further shortened and the productivity can be further improved.

(Third Embodiment) FIG. 6 is a sectional view showing the shape of a grindstone used in the third embodiment to which the present invention is applied. In FIG. 6, (a) shows the front surface of the grindstone. Figure,
(B) is sectional drawing which follows the BB line, (c) is an enlarged view in a dotted-line circle in (b). Further, FIG. 7 is a drawing for explaining the processing method of the third embodiment.

The third embodiment differs from the above-described first embodiment in the shape of the grindstone used, and is different only in the arrangement of the grindstone head and the movement locus of the grindstone in the working process. The apparatus configuration for performing the operation is the same as that of the first embodiment described above.

Grinding stone 3 used in the third embodiment
As shown in FIG. 6, it has a disc shape, and an abrasive grain layer is fixed to the outer periphery of the core 10 (or is entirely made up of the abrasive grain layer), and is formed at a predetermined angle from the outside of the disc toward the center of the disc. The third grindstone surface 15 that is inclined at
And a fourth grindstone surface 16 having an arcuate cross-section on the outer peripheral surface of the disk.

As shown in the drawing, the third grindstone surface 15 is a grindstone surface which is continuous from the end of the fourth grindstone surface 16 and which is flat in the inclination direction. The inclination angle of the third grindstone surface is preferably the same angle as that of the first grindstone surface in the above-described first embodiment.

The fourth grindstone surface 16 is an arc having a smaller radius of curvature than the arc of the sectional shape of the rolling surface 104 of the disk 100.

Next, with reference to FIG. 7, a disk grinding method according to the third embodiment will be described.

First, similarly to the first embodiment, the disc 100 is fixed from the end face 102 side by the chuck 31.

On the other hand, the grindstone head 20 has the third grindstone surface 1
5 is attached to the head moving mechanism 22 so that the disk 5 is parallel to the outer peripheral surface 103 of the disk 100.

While rotating the disk 100 fixed by the chuck 31 and rotating the grindstone 3, the third grindstone surface 15 is formed in a direction parallel to the outer peripheral surface 103 of the disk 100 and from the outer peripheral surface. Disc 100
The disk moving mechanism 33 is operated so that the disk moving mechanism 33 moves closer to the position (solid line in the figure).

As a result, the grindstone 3 moves relative to the disc 100 in the direction of arrow A shown in FIG. 7, and the third grindstone surface 15 and the fourth grindstone surface 16 cause the disc 100 to move. The outer peripheral surface 103 is ground.

Then, while the rotation of the disk 100 is maintained, the fourth grindstone surface 16 moves relatively along the arcuate cross section of the rolling surface 104 of the disk 100 (two-dot chain line in the figure). , The head moving mechanism 22 and the disk moving mechanism 33 are operated.

As a result, the grindstone 3 moves relative to the disc 100 in the direction of arrow B shown in FIG. 7, and the rolling surface 104 of the disc 100 is ground by the fourth grindstone surface 16. It

As described above, in the third embodiment, as the grindstone 3 to be used, the inclined third grindstone surface 15 and the fourth grindstone surface 16 having an arcuate cross section form the outer peripheral surface 103 of the disk 100. Since the rolling surface 104 can be continuously ground, the relative movement loci of the disk 100 and the grindstone 2 are continuous, so that the productivity can be further improved.

In the third embodiment, the rolling surface 1
In the grinding of No. 04, it was decided to machine by the fourth grindstone surface 16 having a sectional arc with a radius of curvature smaller than the sectional arc shape of this rolling surface, so it can be seen from the section of the rolling surface shown in FIG. In addition, when processing the portion 104 '(within the circle in the drawing) where the R shape of the end of the rolling surface is projected, it can be favorably molded without tilting the grindstone. Especially, since it is not necessary to tilt the grindstone, it is possible to continuously grind the rolling surface from the outer peripheral surface without changing the position or angle of the grindstone head, which improves productivity. it can.

Further, since grinding is carried out on an arc grindstone surface having a smaller radius of curvature than the cross-sectional arc radius of the rolling surface, a crosshatch-like grinding mark is formed on the ground surface, which is a sliding and rolling surface. Since it acts as an oil sump, it also improves the part performance of the workpiece.

Although the above description is for grinding the rolling surface 104, it is also possible to continue grinding the end surface 101 after grinding the rolling surface 104. In this case, the outer peripheral surface 103 and the rolling surface 1
04, the end surface 101 can be continuously ground, and the productivity can be further improved.

(Fourth Embodiment) FIG. 9 is a sectional view showing the shape of a grindstone used in the fourth embodiment to which the present invention is applied, and FIG. 10 shows the shape of the fourth embodiment. It is a drawing for explaining a processing method.

The fourth embodiment differs from the above-described first embodiment in the shape of the grindstone used, and is different only in the arrangement of the grindstone head and the movement locus of the grindstone in the working process. The apparatus configuration for performing the operation is the same as that of the first embodiment described above.

Whetstone 4 used in the fourth embodiment
As shown in FIG. 9, it has a disc shape, and an abrasive grain layer is fixed to the outer periphery of the core 10 (or is made entirely of the abrasive grain layer), and is inclined at a predetermined angle inside the disc, and is inclined. It has a third grindstone surface 15 that is flat in the direction, and a fourth grindstone surface 16 that is continuous from the third grindstone surface 15 and has an arcuate cross section on the outer peripheral surface of the disk.

As shown in the drawing, the third grindstone surface 15 is a grindstone surface that is inclined inward from the end of the fourth grindstone surface 16 toward the center of the disk at a predetermined angle and is flat in the tilt direction. The inclination angle of the third grindstone surface is preferably the same angle as that of the first grindstone surface in the above-described first embodiment.

The fourth grindstone surface 16 is an arc having a smaller radius of curvature than the arc of the sectional shape of the rolling surface 104 of the disk 100.

Next, with reference to FIG. 10, a disk grinding method according to the fourth embodiment will be described.

First, similarly to the first embodiment, the disc 100 is fixed from the end face 102 side by the chuck 31.

On the other hand, the grindstone head 20 has the third grinding surface 1
It is attached to the head moving mechanism 22 so that 5 is parallel to the outer peripheral surface 103 of the disk 100.

While rotating the disk 100 fixed by the chuck 31 and rotating the grindstone 4, the third grindstone surface 15 is formed in a direction parallel to the outer peripheral surface 103 of the disk 100 and from the outer peripheral surface. Disc 100
The disk moving mechanism 33 is operated so that the disk moving mechanism 33 moves closer to the position (solid line in the figure).

As a result, the grindstone 4 moves relative to the disc 100 in the direction of arrow A shown in FIG. 9, and the third grindstone surface 15 and the fourth grindstone surface 16 cause the disc 100 to move. The outer peripheral surface 103 is ground.

Then, while the rotation of the disc 100 is maintained, the fourth grindstone surface 16 moves relatively along the arcuate cross section of the rolling surface 104 of the disc 100 (two-dot chain line in the figure). , The head moving mechanism 22 and the disk moving mechanism 33 are operated.

As a result, the grindstone 4 moves in the direction of arrow B shown in FIG. 9 relative to the disc 100, and the rolling surface 104 of the disc 100 is ground by the fourth grindstone surface 16. It

As described above, in the fourth embodiment, as the grindstone 4 to be used, the inclined third grindstone surface 15 and the arc-shaped fourth grindstone surface 16 are used to roll the outer peripheral surface 103 of the disk 100. Since the moving surface 104 can be continuously ground and the relative movement loci of the disk 100 and the grindstone 4 are continuous, the cycle time can be shortened and the productivity can be further improved.

Also in the fourth embodiment, similarly to the above-described third embodiment, it is not necessary to tilt the grindstone even when processing the end portion of the rolling surface, and the ground surface is not crossed. Since hatch-like grinding marks are formed, this can act as an oil reservoir on the sliding and rolling surfaces. Further, the end surface 101 may be ground after the outer peripheral surface 103 and the rolling surface 104 are ground, which can further improve the productivity.

(Fifth Embodiment) FIG. 11 is a drawing for explaining a processing method of a fifth embodiment to which the present invention is applied.

The fifth embodiment uses the grindstone 3 (see FIG. 6) used in the above-mentioned third embodiment,
This is to grind the parallel roller of the toroidal type continuously variable transmission. The grinding device is the same as that of the third embodiment described above, except that the mounting direction of the grindstone 3 and the mounting angle of the grindstone head 20 to which the grindstone 3 is mounted are different.

A method of grinding a disk in the fifth embodiment will be described.

First, similarly to the first embodiment, the parallel roller 200 is fixed by the chuck 31 from the end face 202 side.

On the other hand, the grindstone 3 is attached to the grindstone head 20 in the direction opposite to that of the third embodiment, and the grindstone head 20 has the rotation axis of the grindstone and the rotation axis of the power roller parallel to each other. It is attached to the head moving mechanism 22 as described above.

Then, while the parallel roller 200 fixed by the chuck 31 is rotated and the grindstone 3 is rotated, the third grindstone surface 15 is in a direction parallel to the outer peripheral surface 201 of the parallel roller 200 and from the outer peripheral surface. The disk moving mechanism 33 is arranged in a direction in which the disk moves close to the disk 100 and moves.
To operate.

As a result, the grindstone 3 is moved to the parallel roller 200.
Relative to the third grindstone surface 15 and the fourth grindstone surface 16 in the direction of arrow A shown in FIG.
Thus, the outer peripheral surface 201 of the parallel roller 200 is ground.

Subsequently, while the rotation of the parallel roller 200 is maintained, the head is moved so that the fourth grindstone surface 16 of the grindstone 3 relatively moves along the arcuate cross section of the arcuate cross section 203 of the parallel roller 200. The mechanism 22 and the disk moving mechanism 33 are operated.

As a result, the grindstone 3 is moved to the parallel roller 200.
Relative to, arrows B and C shown in FIG.
As a result, the fourth grindstone surface 16 grinds the arc-shaped section 203 of the parallel roller 200.

As described above, in the fifth embodiment, even if the grindstone 3 is used to form a member having a circular arc shape having a convex cross section, the circular arc shaped portion 20 from the outer peripheral surface 201 to the circular arc shape portion 20 is formed.
Since the grinding can be continuously performed up to 3, productivity of the parallel roller 200 can be improved, and processing accuracy of the outer peripheral surface and the arcuate cross-section can be improved.

Although the embodiments to which the present invention is applied have been described above, the present invention is not limited to these embodiments, and a plurality of surfaces to be ground can be continuously ground. is there.

[Brief description of drawings]

FIG. 1 is a drawing showing an apparatus configuration for performing a grinding process in a first embodiment to which the present invention is applied.

2A and 2B are drawings showing a shape of a grindstone used in the first embodiment, in which FIG. 2A is a front view of the grindstone, FIG. 2B is a sectional view taken along line AA, and FIG. 3 is an enlarged view in a dotted circle in FIG.

FIG. 3 is a drawing for explaining the processing method according to the first embodiment.

FIG. 4 is a drawing showing a shape of a grindstone used in a second embodiment to which the present invention is applied, (a) is a front view of the grindstone,
(B) is sectional drawing which follows the BB line, (c) is an enlarged view in a dotted-line circle in (b).

FIG. 5 is a drawing for explaining the processing method of the second embodiment.

FIG. 6 is a sectional view showing the shape of a grindstone used in a third embodiment to which the present invention is applied, and in FIG.
Is a front view of the grindstone, (b) is a sectional view taken along line BB,
(C) is an enlarged view within a dotted circle in (b).

FIG. 7 is a drawing for explaining a processing method according to a third embodiment.

FIG. 8 is a sectional view of a disk rolling surface.

FIG. 9 is a sectional view showing the shape of a grindstone used in a fourth embodiment to which the present invention is applied.

FIG. 10 is a drawing for explaining a processing method according to a fourth embodiment.

FIG. 11 is a drawing for explaining the processing method of the fifth embodiment to which the present invention is applied.

FIG. 12 is a drawing for explaining a conventional disk grinding method.

[Explanation of symbols]

1, 2, 3, 4 ... Whetstone 10 ... Core 11 ... Peripheral whetstone surface 12 ... 1st whetstone surface 13 ... Second whetstone surface 14 ... Front whetstone surface 15 ... Third whetstone surface 16 ... Fourth whetstone surface 20 ... Whetstone head 22 ... Head moving mechanism 21 ... Rotating axis 30 ... Rotary grinding machine 31 ... Chuck 32 ... Motor 33 ... Disk moving mechanism 100 ... Disc 101, 102 ... end face 103 ... Outer peripheral surface 104 ... Rolling surface 104 '... The part where the R shape is protruding 105 ... Inner diameter part 200 ... Parolar 201 ... Outer peripheral surface 202 ... End face 203 ... Arc-shaped section

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Minoru Ota             Nissan, Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan             Inside the automobile corporation F term (reference) 3C049 AA03 AA09 AA11 BB06 CA03                       CB03

Claims (6)

[Claims] 1. A grinding method for grinding a surface of a workpiece to be ground with a grindstone, wherein the workpiece is rotated to extend from the outer peripheral surface extending parallel to the outer peripheral surface of the workpiece to the outer peripheral surface thereof. A step of bringing the outer peripheral surface of the grindstone closer to the outer peripheral surface at a predetermined angle to grind the outer peripheral surface, and continuously rotating the workpiece while rotating the workpiece. From the outside of the end surface extending parallel to the surface direction from the end surface of the workpiece to the end surface direction, the second grindstone surface forming a predetermined angle with respect to the end surface provided on the grindstone is approached, And a step of grinding the end face. 2. A relative movement locus between the grindstone and the workpiece from the start of the step of grinding the outer peripheral surface to the end of the step of grinding the end surface is continuous. Item 1. The grinding method according to Item 1. 3. A grinding method for grinding a surface to be ground of a workpiece with a grindstone, wherein the workpiece is rotated, and the outer peripheral surface extending from the outer peripheral surface of the workpiece parallel to the surface A step of approaching the outer peripheral surface from a third grindstone surface that forms a predetermined angle with respect to the outer peripheral surface provided on the grindstone, and grinding the outer peripheral surface; and rotating the workpiece. Continuing, the cross-section arc-shaped portion of the workpiece is transferred from outside the cross-section arc-shaped portion to the cross-section arc-shaped portion, and the cross section of the grindstone has an arc with a local radius smaller than the radius of the cross-section arc-shaped portion. And a step of moving the formed fourth grindstone surface along an arc of the arcuate section to grind the arcuate section. 4. A relative movement locus between the grindstone and the workpiece from the start of the step of grinding the outer peripheral surface to the end of the step of grinding the cross-section arc-shaped portion is continuous. The grinding method according to claim 3, characterized in that. 5. The grinding method according to claim 1, wherein the workpiece is a disk of a toroidal type continuously variable transmission. 6. The grinding method according to claim 3, wherein the work piece is a power roller of a toroidal type continuously variable transmission.