JPS64280Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tool for grinding the peripheral surface of a disc-shaped grindstone in a grinding machine to correct the peripheral surface shape.

[Conventional technology]

In a grinding machine that performs grinding by sliding various parts on the circumferential surface of a disc-shaped grindstone, the circumferential surface of the whetstone deforms as the grinding process is repeated, which hinders grinding. It is necessary to correct the peripheral surface shape into an appropriate shape by grinding with a correction tool.

The conventional straightening tool 1 shown in FIG. 6 consists of a pair of diamonds 2 and 3 that are in sliding contact with the circumferential surface of a grindstone and are embedded in the free end surface of a rod-shaped tool body 4 (for example, in Japanese Patent Laid-Open No. 59 -Refer to Publication No. 30668).

[The problem that the idea attempts to solve]

The conventional straightening tool 1 as described above has a tool body 4
The free end surface 4a of the diamond 2, 3 is substantially perpendicular to the center axis L of the tool body 4, and
protrudes from the free end surface 4a by approximately the same amount, so in order to make both diamonds 2 and 3 come into uniform contact with the circumferential surface of the grinding wheel, the tool body 4 must be aligned so that its center axis L accurately aligns with the center of rotation of the grinding wheel. It must be held so that the free end surface 4a is parallel to the tangent that passes through the intersection of the peripheral surface of the grindstone and the central axis L.

However, depending on the grinding machine, it may not be possible to orient the center axis L of the tool body 4 accurately to the rotation center of the grindstone due to the relationship with the workpiece holding table, cover, etc.
Or it may be difficult, and in such a case, the tool body 4
Straightening work is often performed with the center axis L of the grindstone pointing in a direction vertically away from the center of rotation of the grindstone.

Then, one of the diamonds 2 or 3 floats in the air, and only the other diamond 3 or 2 makes partial contact with the circumferential surface of the whetstone and grinds the circumferential surface of the whetstone, rapidly wearing out and forming the straightening tool 1. The lifespan of will be shortened.

Further, a chamfer 4b is formed on the periphery of the free end surface 4a of the tool body 4 to prevent it from coming into contact with the circumferential surface of the grindstone. Therefore, diamond 2,3
The distance D between them becomes shorter, the diameter in which the diamonds 2 and 3 can be embedded becomes smaller, the wear during straightening the grindstone becomes significant, and the life of the tool becomes shorter.

The present invention was devised in view of the above-mentioned problems of the conventional technology, and its purpose is to make the tool body such that its center axis L points away from the center of rotation of the grindstone. in support of
In addition to being able to perform straightening work, the pair of diamonds can evenly contact the circumferential surface of the grindstone without uneven contact, and the outer diameter of the tool body is the same as that of conventional tools. Another object of the present invention is to provide a tool for straightening a grinding wheel in a grinding machine, which allows the distance between a pair of diamonds to be larger than that of conventional ones, and allows the use of large-diameter diamonds.

[Means to solve the problem]

In order to achieve the above purpose, in this invention,
A rod-shaped tool body is placed against the circumferential surface of a disc-shaped grindstone that rotates in one direction, and its center axis L intersects the rotation center O of the grindstone and the intersection point P where the center axis L intersects with the circumference of the grindstone.
The free end surface of the tool body is supported at an appropriate inclination angle α with respect to a straight line A passing through the center axis L, and the free end surface of the tool body is supported at an inclination angle α equal to the above-mentioned inclination angle By inclining the tool body by an inclination angle α', the free end surface of the tool body is made parallel to the tangent C passing through the intersection P on the circumferential surface of the grindstone, and the central axis L on the free end surface of the tool body
At least one pair of diamonds for grinding the circumferential surface of the grindstone are buried at positions approximately equidistant from each other in the circumferential direction of the grindstone so that their tips protrude from the free end surface of the tool body by approximately the same distance. ing.

Note that it is preferable that the diameter of the free end surface of the tool body be larger than the diameter of the base.

[Effect]

According to the present invention, when the tool body is pressed toward the circumferential surface of the grindstone, the free end surface of the tool body becomes parallel to the tangent passing through the intersection point P of the center axis L of the tool body and the circumferential surface of the grindstone, and The diamonds come into uniform contact with the circumferential surface of the grinding wheel without uneven contact.

In addition, since the free end surface of the tool body is inclined at the required inclination angle α' with respect to the plane perpendicular to the center axis, the free end surface is sec smaller than the outer diameter of the tool body.
The length is increased by α', and the distance between a pair of diamonds can be increased by that amount, and the diameter of each diamond can be increased accordingly.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

In FIG. 1, a disc-shaped grindstone 6 is rotatable around a shaft 7 in the direction of the arrow.

Appropriate fixing part on the right side of the grindstone 6 (not shown)
The rod-shaped tool main body 11 of the straightening tool 9 is held in the grip part 8 of the straightening device provided in the grip part 8 of the straightening tool 9.
It is detachably supported so as to form an appropriate inclination angle α with respect to a straight line A passing through the intersection point P that intersects the line a.

Further, by positioning the tool body 11 above the horizontal horizontal axis 12 passing through the rotation center O of the grindstone 6, the straight line A forms an appropriate upward inclination angle β with respect to the horizontal axis 12.

Both sides of the free end of the tool body 11 are ground into a tapered shape as shown in FIG. 2 to form a narrow free end surface 11.
It is formed almost wedge-shaped with a remaining. As shown in FIG. 3, this free end surface 11a is inclined upwardly to the left by an inclination angle α', which is the same as the above-mentioned inclination angle α, with respect to a plane B perpendicular to the central axis L of the tool body 11.

A pair of diamonds 14 and 15 are placed above and below the free end surface 11a of the tool body 11 at equal distances from the center axis L, and a bonding agent 16 is applied to the free end surface 11a with the tips of the diamonds 14 and 15 protruding from the free end surface 11a by an equal distance. It is buried at right angles through the hole.

In the above-mentioned relationship, when the tool body 11 is pressed toward the circumferential surface 6a of the grindstone 6, the tool body 1
The free end surface 11a of the diamond 1 is parallel to a tangent C passing through the intersection P on the circumferential surface 6a of the grindstone 6, and the tips of both diamonds 14 and 15 uniformly contact the circumferential surface 6a of the grindstone 6.

In this state, by rotating the grindstone 6 and moving the straightening tool 9 laterally in the width direction of the grindstone 6, the peripheral surface 6a of the grindstone 6 is corrected to have a uniform radius.

Note that when the direction of the central axis L of the tool body 11 is always the same, as the radius of the grindstone 6 becomes smaller, the angle of inclination α becomes larger.

Therefore, it is advisable to prepare a plurality of types of straightening tools 9 whose inclination angle α' of the free end surface 11a shown in FIG. 3 is appropriately determined in accordance with the radius of the grindstone 6.

As described above, according to this embodiment, the diamonds 14 and 15 come into uniform sliding contact with the circumferential surface 6a of the grindstone 6, so that the life of the straightening tool can be extended.

Further, the free end surface 11a of the tool body 11 is connected to the grinding wheel 6.
By being parallel to the tangent C on the circumferential surface of
There is no risk that the upper and lower edges of the free end surface 11a will come into contact with the circumferential surface 6a, and therefore, chamfering 4b as in the conventional straightening tool 1 shown in FIG. 6 is not necessary. Therefore, as shown in FIG.
Since the distance D of 5 can be made larger than before,
It becomes possible to embed relatively large diamonds 14 and 15, and the life of the straightening tool 9 for straightening the grindstone 6 can be extended.

FIG. 5 shows another embodiment of the invention.

A large diameter portion 22 is formed at the free end of the tool body 21 of this straightening tool 19. The free end surface 22a of the large diameter portion 2 is inclined similarly to the free end surface 11a of the tool body 11 of the previous embodiment, and a pair of diamonds 23 and 24 are embedded therein.

Since the free end surface 22a has a larger area than the free end surface of the embodiment, diamonds 23 and 24 larger than the diamonds 14 and 15 can be embedded therein, and the straightening tool 19
This makes it possible to further extend the lifespan of the

[Effect of idea]

As described above, according to the present invention, both diamonds can come into uniform sliding contact with the circumferential surface of the grindstone, and the dimensions thereof can be made large, so that the life of the straightening tool can be extended.

[Brief explanation of drawings]

FIG. 1 is a side view showing an embodiment of the straightening tool of the present invention used for a grinding wheel of a grinding machine, FIG. 2 is a plan view of the tip of the straightening tool, and FIG. 3 is a side view of the straightening tool. FIG. 4 is a front view, FIG. 5 is a side view of a straightening tool according to another embodiment of the present invention, and FIG. 6 is a side view of an example of a conventional straightening tool. 1... Straightening tool, 2, 3... Diamond, 4
... Tool body, 4a ... Free end surface, 4b ... Chamfer, 6 ... Grindstone, 6a ... Circumferential surface, 7 ... Shaft, 8 ...
...Gripper, 9, 19...Correcting tool, 11, 21...
...Tool body, 11a, 22a...Free end surface, 12...
...Horizontal axis line, 14, 15, 23, 24...Diamond, 16...Binder, 22...Large diameter portion, α,
α'...Inclination angle, β...Upward inclination angle, A...Straight line, B...Face perpendicular to the central axis, C...Tangential line,
D...distance, L...center axis, O...center of rotation of the grindstone, P...point of intersection.

Claims (1)

[Scope of claims for utility model registration] (1) For the circumferential surface of a disc-shaped grindstone that rotates in one direction,
The rod-shaped tool body is supported so that its center axis L forms an appropriate inclination angle α with respect to a straight line A passing through the rotation center O of the grindstone and the intersection P where the center axis L intersects with the circumferential surface of the grindstone. At the same time, by inclining the free end surface of the tool body by an inclination angle α' that is the same as the inclination angle α with respect to a plane B perpendicular to the central axis L, the free end surface of the tool main body can be tilted around the grindstone. at least one pair that is parallel to a tangent line C passing through the intersection point P on the surface and that grinds the peripheral surface of the grindstone at a position approximately equidistant in the circumferential direction of the grindstone from the center axis L on the free end surface of the tool body; A grinding wheel straightening tool for a grinding machine, characterized in that a diamond is embedded in such a way that its tip protrudes from the free end surface of the tool body by an approximately equal distance. (2) A tool for straightening a grinding wheel in a grinding machine according to claim (1) of the utility model registration, characterized in that the diameter of the free end surface of the tool body is larger than the diameter of the base.