JP2002096263A - Truing and dressing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out appropriate truing and dressing corresponding to a wheel constitution of a grinding wheel at the time of concurrent truing and dressing of the grinding wheel. SOLUTION: A truing grinding wheel of disc shape and a dressing grinding wheel of disc shape other than the truing grinding wheel are mounted on a rotatable holding shaft. Peripheral surfaces of the truing grinding wheel and the dressing grinding wheel are held so as to opposite to a peripheral surface of a grinding wheel. The grinding wheel is rotated such a direction as to cut the truing grinding wheel and go through the dressing grinding wheel. The peripheral surface of the grinding wheel is concurrently brought into contact with the peripheral surfaces of both the truing grinding wheel and the dressing grinding wheel, thereby carrying out concurrent truing and dressing of the grinding wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for simultaneously performing truing and dressing of a grinding wheel.

[0002]

2. Description of the Related Art As a grinding wheel for grinding a hard workpiece, for example, a grinding wheel in which a binder such as a resin bond contains abrasive grains such as diamond grains is used. In such a grinding wheel, the type of the binder and the type, size, and grain size of the binder are appropriately selected according to the material of the workpiece, the required processing accuracy, the relationship between the binder and the abrasive grains, and the like. Then, the wheel configuration of the grinding wheel is determined. Further, when grinding an arbitrary shape such as a non-axial or free-form surface with a grinding wheel, a grinding wheel having a curved contact surface is used.

On the other hand, when a grinding wheel is mounted on a processing machine to perform grinding with high precision, the precision of the processing surface of the grinding wheel has a great influence on the precision of grinding. For this reason,
After the grinding wheel is mounted on the processing machine, truing and dressing operations of the grinding wheel are indispensable. The truing and dressing work is necessary not only at the first use after the purchase of the grinding wheel, but also during the use.

As an apparatus for truing and dressing a grinding wheel, Japanese Patent Application Laid-Open No. 8-323618 discloses an apparatus using a truing and dressing wheel in which a steel portion and a general grinding portion are integrally formed.
In this apparatus, a cup-type composite grinding wheel that performs truing and dressing simultaneously by rotating a grinding wheel for truing and dressing and bringing the grinding wheel into surface contact with the surface of a rotating diamond grindstone is used.

[0005]

However, the cup-type composite grinding wheel in which the steel part and the general grinding part are integrally formed has the following problems.

First, since the steel part contributing to the truing action and the general grindstone part contributing to the dressing action are integrally formed, the composition ratio between the steel part and the general grindstone part and the grindstone forming each part Cannot be changed freely. For this reason, it is not possible to perform a proper truing and dressing operation corresponding to various wheel configurations of the grinding wheel.

Second, since the grinding wheel comes into contact with the plane portion of the composite grinding wheel, the surface of the grinding wheel cannot be trued into a curved shape.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to perform truing and dressing of a grinding wheel with a simple configuration and an appropriate truing and dressing suitable for the wheel configuration of the grinding wheel when efficiently performing truing and dressing of the grinding wheel. It is still another object of the present invention to provide a truing and dressing of a grinding wheel with a simple configuration in order to efficiently perform truing and dressing of the grinding wheel.

[0009]

In order to solve the above-mentioned problems, a truing and dressing method according to the present invention simultaneously performs truing and dressing of a grinding wheel by using a first wheel capable of rotating a disk-shaped grinding wheel. A second wheel that can be mounted on a shaft and rotates a truing wheel in the form of a disk and a dressing wheel in the form of a disk.
By attaching to a shaft, holding the grinding wheel and the truing wheel and the dressing wheel in a plane perpendicular to each other, and so that the peripheral surfaces of each other face each other,
A first shaft is rotated so that the grinding wheel cuts into the truing wheel and rotates in a direction to come out of the dressing wheel, and the peripheral surface of the grinding wheel is rotated around the truing wheel. Surface and the peripheral surface of the dressing wheel at the same time.

[0010] The truing and dressing method according to the present invention is arranged so that the peripheral surface of the grinding wheel moves while being in contact with the peripheral surface of the truing wheel and the peripheral surface of the dressing wheel at the same time. The grinding wheel is reciprocated in a plane perpendicular to two axes.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the overall schematic structure of a truing and dressing apparatus 1 (hereinafter simply referred to as “apparatus 1”) used in the method according to the present embodiment.

As shown in FIG. 1, an L-shaped base 3 extends from the surface parallel to the base 2 of the L-shaped base 3 in a direction perpendicular to the upper surface of the base 2 on the base 2. It has an arm 4 and a rotating shaft 5 rotatably held by the arm 4 and extending in a direction perpendicular to the upper surface of the base 2. A portion of the rotating shaft 5 close to the upper surface of the table 2 is provided with a holding shaft 5 a having a rectangular cross section for holding the truing wheel 21 and the dressing wheel 22. Rotating shaft 5 and holding shaft 5
“a” is integrally rotatable by a motor provided in the arm 4.

On the base 2, a first movable base 6 is provided so as to engage with a rail 61 formed on the base 2 and to be movable on the base 2 in the depth direction. On the first moving table 6, a second moving table 7 is provided so as to engage with a rail 71 formed on the first moving table 6 and to be movable in the lateral direction of the table 2. Further, a third side of the second moving table 7
The moving table 8 is provided so as to engage with a rail 81 formed on the second moving table 7 and to be movable in a direction perpendicular to the table 2. Each of the first to third moving tables 6 to 8 can move on each of the rails 61 to 81 by a motor (not shown).

A shaft 8a having a quadrangular cross section for holding a grinding wheel is formed at the tip end of the third moving table 8 in the depth direction of the table 2. The shaft 8a is rotatable by a motor provided in the third moving table 8.

In such a device 1, when a grinding wheel 23 is attached to the shaft 8a as the first shaft, the grinding wheel 23 is held in parallel with a plane formed in the horizontal and vertical directions of the table 2. Is done. In addition, the truing grinding wheel 21
And holding shaft 5 using dressing wheel 22 as a second shaft
a, the wheels are held parallel to the platform 2. That is, the truing wheel 21, the dressing wheel 22 and the grinding wheel 23 are held in a plane perpendicular to each other and with their peripheral surfaces facing each other.

In this apparatus, the first moving table 6 is connected to the first rail 61, the second moving table 7 is connected to the second rail 71, the third moving table 8 is connected to the third rail 81, and a motor (not shown).
By moving each, the grinding wheel 23 can be three-dimensionally moved to an arbitrary position within a predetermined range while maintaining the parallelism.

FIGS. 2 and 3 are a plan view and a side view, respectively, for explaining the attachment of the truing wheel 21 and the dressing wheel 22 and the grinding wheel 23 to the apparatus 1 and the operation thereof. .

Referring to FIGS. 2 and 3, a grinding wheel 23 is mounted on shaft 8a. The grinding wheel 23 has a rectangular through hole 23a formed at the center thereof and penetrated by the shaft 8a. The rotation of the shaft 8a is transmitted to the grinding wheel 23 by engaging the through hole with the shaft 8a. ing. On the other hand, a truing wheel 21 and a dressing wheel 22 are attached to the holding shaft 5a of the rotating shaft 5. The truing grinding wheel 21 and the dressing grinding wheel 22 also have rectangular through holes 21a and 21b formed at the centers thereof, similarly to the grinding wheel 23, so that the rotation of the holding shaft 5a is transmitted by engaging with the holding shaft 5a. It has become.

The grinding wheel 23 is pressed in the direction of the holding surface 8b provided on the shaft 8a, and is firmly fixed to the shaft 8a by the stopper 10. The grinding wheel 23 holds the holding surface 8
By being sandwiched between the b and the stopper 10, it is possible to prevent the shaft 8a from being shaken. The truing wheel 21 and the dressing wheel 22 are also pressed in the direction of the grinding wheel holding surface 5b of the rotating shaft 5 in the same manner as the grinding wheel 23, so that the stopper 9
Is firmly fixed to the holding shaft 5a. By being sandwiched between the grindstone holding surface 5b and the stopper 9, both grinding wheels are prevented from moving in the direction of the holding shaft 5a.

The truing wheel 21 and the dressing wheel 22 are mounted on the holding shaft 5a in the order of the truing wheel 21 and the dressing wheel 22 from the upper side. Truing wheel 21 and dressing wheel 2
2 has a disk shape with substantially the same diameter and has substantially the same thickness. The truing wheel 21 and the dressing wheel 22 are held by the holding shaft 5a in close contact with each other.

In this manner, the truing wheel 21, the dressing wheel 22, and the grinding wheel 23 are held in a plane perpendicular to each other and with their peripheral surfaces facing each other as described above. It will be. Here, the peripheral surface of the grinding wheel refers to the side surface of the disk-shaped grinding wheel. As described later, the peripheral surface of the grinding wheel 23 is trued into an arbitrary curved surface, and the truing wheel 21 and the dressing wheel 22 The peripheral surface is flat.

The grinding wheel 23 has a disk shape as a whole, and has a diamond layer 23c on a base metal 23b in which a through hole 23a is formed. In the diamond layer 23c, diamond abrasive grains are mixed in a binder (such as a bond). On the other hand, a GC wheel is used as the truing wheel 21, and a WA wheel is used as the dressing wheel 22.

Grinding wheel 23, truing wheel 21
The dressing wheel 22 is attached to the apparatus 1 as described above, and the truing and dressing of the grinding wheel 23 are performed simultaneously. The operation of performing truing and dressing simultaneously will be described below.

First, the shaft 8a is rotated by the motor provided in the third moving table 8 to rotate the grinding wheel 23. At this time, the shaft 8a is rotated in a direction in which the peripheral surface of the grinding wheel 23 moves downward at a position facing the truing wheel 21 and the dressing wheel 22. That is, the shaft 8a is rotated so that the grinding wheel 23 cuts into the truing wheel 21 and rotates in a direction in which the grinding wheel 23 comes out of the dressing wheel 22.

Next, the rotating shaft 5 is rotated by the motor provided in the arm 4 to simultaneously rotate the truing wheel 21 and the dressing wheel 22 held by the holding shaft 5a. At this time, the rotating shaft 5 is rotated counterclockwise as viewed from above.

With the shaft 8a and the rotating shaft 5 rotated as described above, the peripheral surface of the grinding wheel 23 is brought into contact with the peripheral surfaces of the truing wheel 21 and the dressing wheel 22 as shown in FIG. Further, by moving the first moving table and the second moving table, as shown in FIG. 2, the truing wheel 21 and the dressing wheel 2 whose peripheral surfaces rotate.
The grinding wheel 23 is reciprocated within a predetermined range in a plane perpendicular to the holding shaft 5a so as to move while maintaining the contact on the peripheral surface of No. 2. By controlling the reciprocating speed of the grinding wheel 23, the peripheral surface of the grinding wheel 23 can be formed into an arbitrary curved surface.

In the method described above, the truing wheel 21, the dressing wheel 22, and the grinding wheel 23 are held in a plane perpendicular to each other and with their peripheral surfaces facing each other. I have. Furthermore, after a separate truing wheel 21 and a dressing wheel 22 are fitted and mounted on the holding shaft 5a, truing and dressing are simultaneously performed by a rotary method. These make it possible to perform appropriate truing and dressing corresponding to the wheel configuration of the grinding wheel.

The method for obtaining the above effects is not limited to the above-described embodiment, but may be modified as follows.

(1) In the above embodiment, the truing wheel 21 and the dressing wheel 22 are held in close contact with the holding shaft 5a, but the peripheral surface of the grinding wheel 23 is formed by the truing wheel 21 and the dressing. If both the peripheral surfaces of the grinding wheels 22 come into contact at the same time, the two grinding wheels may be attached to the holding shaft 5a at predetermined intervals. In this case, as shown in FIG. 4, a ring 24 having a diameter sufficiently smaller than the diameter of both grinding wheels is attached to the holding shaft 5a between the truing grinding wheel 21 and the dressing grinding wheel 22.

(2) In the above embodiment, the rotating shaft 5
Is rotated counterclockwise when viewed from above the apparatus, but the rotation direction may be reversed. Furthermore, the rotating shaft 5 does not need to be continuously rotated. However, the grinding wheel 23
It is necessary to cut the truing wheel 21 and rotate it in the direction of coming out of the dressing wheel 22.

(3) In the above embodiment, the CG grinding wheel is used as the truing wheel 21 and the WA wheel is used as the dressing wheel 22. However, if the grinding wheel is suitable for truing and dressing the grinding wheel. , CG
It is not limited to whetstone and WA whetstone.

[0033]

According to the truing and dressing method of the present invention, in order to efficiently perform truing and dressing of a grinding wheel, appropriate truing and dressing corresponding to the wheel configuration of the grinding wheel are performed with a simple configuration. It becomes possible. That is, since the truing grinding wheel and the dressing grinding wheel use separate grinding wheels, any combination can be made according to the wheel configuration of the grinding wheel. For example, when emphasizing truing, a thick truing wheel or a coarse truing wheel can be used. In addition, after using such a truing wheel, the dressing wheel can use a thinner wheel or a finer wheel. Of course, the reverse selection is also possible.

Further, in performing the truing and dressing of the grinding wheel efficiently, it is possible to tru the surface of the grinding wheel into a curved shape with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of an entire truing and dressing apparatus 1 for realizing a method according to an embodiment.

FIG. 2 is a plan view for explaining the attachment of the truing wheel 21 and the dressing wheel 22 and the grinding wheel 23 to the apparatus 1 and the operation thereof.

FIG. 3 is a side view for explaining how the truing wheel 21 and the dressing wheel 22 and the grinding wheel 23 attached to the apparatus 1 are attached to the apparatus and their operations.

FIG. 4 is a side view for explaining a truing wheel 21 and a dressing wheel 22 and a grinding wheel 23 attached to the apparatus 1 and a modified example of their operations.

[Explanation of symbols]

5: rotating shaft, 5a: holding shaft, 9: stopper, 21: truing wheel, 22: dressing wheel, 23: grinding wheel

Claims (2)

[Claims] 1. A first rotatable disk-shaped grinding wheel.
By attaching the disc-shaped truing wheel and the disc-shaped dressing wheel to a rotatable second shaft while attaching to the shaft, the grinding wheel, the truing wheel and the dressing wheel are perpendicular to each other. And the first shaft is rotated so that the peripheral surfaces of the grinding wheels are opposed to each other, and the grinding wheel is cut in the truing wheel and rotates in a direction of coming out of the dressing wheel. A truing and dressing method for simultaneously contacting the peripheral surface of the grinding wheel with the peripheral surface of the truing wheel and the peripheral surface of the dressing wheel, thereby simultaneously performing truing and dressing of the grinding wheel. 2. The grinding in a plane perpendicular to the second axis so that the peripheral surface of the grinding wheel moves while being in contact with the peripheral surface of the truing wheel and the peripheral surface of the dressing wheel at the same time. The truing and dressing method according to claim 1, wherein the grinding wheel is reciprocated.