JPH1148143A - Truing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change truing grindstones easily according to kinds of grindstones to be trued, and do away with directionality of the processing, by providing working parts made of a truing material on base members which are detachably fitted to plural planetary gears which is made sun-and-planet motion in proportion to rotation of the shaft. SOLUTION: Six, for example, planetary gears 7 are rotatably fitted in the periphery of a shaft 5. The planetary gears 7 are engaged with an internal gear 8 concentric with the shaft 5, and are made sun-and-planet motion by the rotation of the shaft 5, also are detachably fitted with base members 9 at their axis parts. The base members 9 are provided with working parts 9a as sort of grindstones which are made of diamond abrasive grains 10a (truing materials) on their surface. Under the condition that the shaft 5 is rotated and the base members 9 are made sun-and-planet motion, the grind stone W to be trued is pressed on the working parts 9a, is horizontally moved, then is trued. The truing materials 10 can contact with the grindstone W to be trued from all angles, further sorts and grain sizes of them can be freely selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truing apparatus used for the truing of a grindstone, that is, for repairing or adjusting the shape of the grindstone, for example, in a grinding process using a diamond grindstone or a CBN (boron nitride) grindstone. It is.

[0002]

As a truing apparatus used for truing a grinding wheel as described above, for example, there is a truing apparatus having a structure in which a cup-shaped grindstone is attached to an upper end of a shaft rotated by a motor. In doing so, the grinding surface of the truing grindstone is moved in the left-right direction while the grinding surface of the truing grindstone is in contact with the upper surface of the abrasive layer of the rotating cup-shaped grindstone.

However, in the above-mentioned truing apparatus, there is a limit to the width of change in the contact direction of the cup-shaped grindstone with the truing-target grindstone, so that not only the bond tail of the truing grindstone remains in a fixed direction but also the cup-shaped grinding wheel of the apparatus. Because the grindstone comes into contact with the truing grindstone from the same direction, for example, in a truing apparatus using a diamond grindstone, the abrasive grains cause blinding, and it is difficult to optimize truing conditions. ,
There is a problem in that it is not easy to change the truing whetstone, and only one kind of abrasive can be selected for each truing operation, and solving such a problem is a problem in improving truing workability. Had been an issue.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the conventional truing apparatus, and enables the truing wheel to be easily replaced in accordance with the type of the truing wheel, and the truing wheel to be replaced. It is an object of the present invention to provide a truing apparatus which can largely change the contact direction (contact angle) of the truing grindstone with the truing wheel to eliminate the directional property of the truing process and greatly improve the truing workability.

[0005]

According to a first aspect of the present invention, there is provided a truing device rotatably supported by a housing and rotatably mounted on the shaft by a driving device, and having a shaft mounted on the housing. A plurality of planetary gears that mesh with an internal gear formed coaxially with the planetary gears and perform planetary motion in accordance with the rotation of the shaft, and a base that is detachably attached to the planetary gears and performs planetary motion integrally with the planetary gears A truing device according to claim 2 of the present invention is rotatably supported by the housing and rotated by a drive device. And a circular opening rotatably mounted on the shaft and formed coaxially with the shaft in the housing. A plurality of rotating members that come into contact with the inner peripheral surface of the shaft via a fluid and perform planetary motion in accordance with the rotation of the shaft; and a base member that is detachably attached to the rotating members and performs planetary motion integrally with the rotating member. A processing part made of a truing material is formed on at least one of the base members, and the configuration of such a truing device is a means for solving the above-mentioned conventional problems. I have.

[0006] As an embodiment of the truing apparatus according to the present invention, in the apparatus according to the third aspect, a base member provided with processing portions having different grain sizes or types of truing materials is mixed. According to a fourth aspect of the present invention, there is provided a truing apparatus according to the fourth aspect, in which a base member having a processed portion is interposed via an elastic member. In the truing apparatus according to the fifth aspect, the granular material has a lower hardness than the truing material. The present invention is characterized in that a base member provided with a processing portion composed of the above is mixed, and such a configuration in the truing apparatus is a means for solving the above-mentioned conventional problems.

[0007]

According to the first aspect of the present invention, there is provided a truing device rotatably mounted on a shaft, a plurality of planetary gears meshing with an internal gear provided on a housing, and removably mounted on these planetary gears. And a processed portion made of a truing material is formed on at least one of the base members.

That is, in the truing apparatus, the base member provided with the processing portion made of the truing material moves in a planetary motion together with the planetary gears by rotation of the shaft, that is, the base member moves around the shaft while rotating (rotating). When the truing whetstone is moved while making contact with the processed part formed on the surface of each base member that is in planetary motion, the contact angle of the truing material of the base member with respect to the truing whetstone is continuous. The truing material particles of the base member come into contact with the abrasive grains of the truing stone at any angle, so that the abrasive grains in the rotation direction behind the abrasive grains were impossible with the conventional apparatus. Side of the bond can be removed, the bond surface is flattened, and the protrusion of abrasive grains is ensured. The abrasion of the truing material of the base member and the truing grindstone is suppressed, sharpening of the truing grindstone becomes possible, and dressing with a WA stick or the like during truing becomes unnecessary. The performance is improved. Furthermore, since the base member is detachably attached to the planetary gear, it is possible to easily cope with the replacement of the base member, and the type and the particle size of the truing material can be freely selected according to the type of the truing stone to be trued. This is an extremely excellent effect of being able to do so.

A truing device according to a second aspect of the present invention is provided with a plurality of rotating members rotatably mounted on a shaft and performing planetary motion while making contact with an inner peripheral surface of a circular opening of a housing via a fluid, Each of these rotating members is provided with a base member detachably attached thereto, and at least one of the base members is formed with a processed portion made of a truing material. That is, since the planetary gear mechanism in the truing device according to the first aspect is replaced with a fluid friction mechanism, the rotation of the rotating member and the base member is smooth and less vibrated. In addition to the above-described effects of the truing device, an effect is obtained that the truing-target grindstone can be formed more precisely.

In a truing apparatus according to a third aspect of the present invention, since the truing apparatus according to the third aspect includes base members having different types or grain sizes of the truing members constituting the processing portion, the respective truing apparatuses are mixed. The truing process utilizing the characteristics of the material can be simultaneously applied to the truing grindstone, and the workability and work efficiency of the truing can be improved. In the truing device according to claim 4 as an embodiment, for example, rubber is used. Since the base member having the processed portion formed through the elastic member and the base member having no elastic member are mixed, the pressing force against the truing-target grindstone is adjusted according to the characteristics of the truing material. And removes only the bond of the truing whetstone even deeper. In the truing apparatus according to the fifth aspect, the base member provided with a processing part made of a granule having a hardness lower than that of a truing material such as diamond abrasive grains or GC abrasive grains, for example, glass powder, is used as a normal truing apparatus. Since it is mixed in the base member with the material, the excess bond attached to the surface of the truing-target whetstone can be scraped off by low-hardness granules, further reducing the truing material cost. Excellent effect is brought.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

Embodiment 1 FIGS. 1 and 2 illustrate a truing device according to a first embodiment of the present invention. FIG. 1A is a longitudinal sectional view showing the structure of the truing device. FIG. 1 (b)
FIG. 2 is a partially broken plan view showing the planetary gear mechanism.

The truing device 1 shown in the figure has an electric motor 3 (drive device) and a shaft 5 rotatably supported by the housing 2 by bearings 4 in a housing 2. A belt 6 is stretched between the attached pulley 3 a and a pulley 5 a provided at the lower end of the shaft 5, and the rotation of the motor 3 is transmitted to the shaft 5 via the belt 6.

In this embodiment, six planetary gears 7 are rotatably mounted on the shaft 5 at positions near the outer peripheral portion thereof. These planetary gears 7 mesh with internal gears 8 formed coaxially with the shaft 5 at the upper opening of the housing 2, and the planetary gear 7 rotates around the central axis of the shaft 5 by rotation of the shaft 5. To do.

A base member 9 is detachably attached to the shafts of the planetary gears 7 so that the planetary gears 7 perform planetary motion integrally with the planetary gears 7 based on the rotation of the shaft 5. These base members 9 are disk-shaped with a flat upper surface, and in this embodiment, whetstone-shaped processed portions 9a made of diamond abrasive grains 10a (truing material) are formed on the surfaces thereof. ing.

A gap formed between the housing 2 and the shaft 3 and a gap between the shaft 3 and the base member 9 are provided with sealing materials 11, respectively, for grinding used in truing work. The inside of the truing apparatus 1 is protected from the liquid, the grindstone W to be trued, or the abrasive grains dropped off from the processing portion 9a of the base member 9.

In the truing apparatus 1 having such a structure, when the electric motor 3 is rotated, the rotation is transmitted to the shaft 5 via the belt 6, and the shaft 5 starts rotating.

When the shaft 5 rotates, the planetary gear 7 attached to the shaft 5 rotates in the direction opposite to the rotation direction of the shaft 5 while meshing with the internal gear 8 so that the planetary gear 7 can be detachably attached to the shaft of the planetary gear 7. Mounted base member 9
2 also perform planetary motion integrally with the planetary gears 7 as indicated by arrows in FIG.

In this state, as shown in FIG. 1A, the truing whetstone W is moved in the horizontal direction while being pressed against the processing portion 9a formed on the surface of the base member 9, whereby the truing is performed. Truing is performed on the grindstone W, and shaping and dressing of the grindstone W are performed.

At this time, since the base member 9 is in a planetary motion, that is, in a circular motion (revolving) around the shaft 5 while rotating around its own axis, the truing stone W moves in the horizontal direction. In the meantime, the contact direction of the base member 9 with the truing grindstone W continuously changes greatly, and the diamond abrasive grains 10a as the truing material constituting the processing portion 9a of the base member 9 are changed to the abrasive grains of the truing grindstone W. On the other hand, since it comes into contact from all directions, the bond on the rear side in the rotation direction of the abrasive grains of the truing whetstone W can also be shaved, and the bond surface is flattened and the abrasive grains reliably project. Can be
The truing grindstone W can be sharpened sharply, and truing and dressing inside are not required, and truing workability is greatly improved.

In the truing apparatus 1, since the base member 9 is detachably attached to the planetary gear 7, the base member 9 can be easily replaced in accordance with the wear of the truing material, and the processing portion can be easily replaced. By preparing in advance several types of base members 9 having different particle sizes and types of truing materials constituting 9a,
The truing material can be freely selected in accordance with the type of the truing whetstone W.

Embodiment 2 FIG. 3 is a longitudinal sectional view for explaining a truing apparatus according to a second embodiment of the present invention.

The truing device 1 shown in FIG. 1 includes an electric motor 3 and a shaft 5 rotatably supported by the housing 2 in a housing 2. Similarly, the rotation of the motor 3 is controlled by a shaft 6 via a belt 6. 5 is transmitted.

In this embodiment, six rotating members 12 are rotatably mounted on the shaft 5 at positions near the outer peripheral portion thereof. These rotating members 12 are mounted on the upper surface of the housing 2 with the shaft 5. It is arranged so as to be in contact with the inner peripheral surface of the coaxially formed circular opening portion 13 through oil as a fluid, so that the rotation of the shaft 5 causes the planetary motion around the central axis of the shaft 5. It is.

The shafts of these rotating members 12 include
Similar to the truing apparatus according to the first embodiment, base members 9 each having a grindstone-shaped processed portion 9a made of diamond abrasive grains 10a on its surface are detachably attached,
The planetary motion is performed integrally with the rotating member 12 based on the rotation of the shaft 5 by the operation of the motor 3.

That is, in the truing device 1 according to this embodiment, the planetary gear mechanism including the internal gear 8 and the planetary gear 7 in the truing device according to the first embodiment is replaced by a fluid friction mechanism. As in the apparatus according to Example 1, the sharpening of the truing grindstone W is enabled by the planetary motion of each base member 9, and the truing workability is greatly improved.
Since the rotation of each base member 9 becomes smoother and the vibration is reduced as compared with the gear mechanism, the truing stone W
More precise molding becomes possible.

Embodiment 3 FIG. 4 is a perspective view showing the structure of a truing device according to a third embodiment of the present invention.

A truing device 1 according to this embodiment
Has a structure basically similar to that of the truing apparatus according to the first embodiment, but the truing material constituting three processing portions 9a of the six base members 9 is diamond abrasive grains 10a. With the remaining three processing parts 9
The truing material constituting a is made of GC abrasive grains 10b (silicon carbide), and has a structure in which base members 9 of different truing materials are alternately arranged.

According to the truing apparatus 1 having such a structure, as in the apparatus according to the first embodiment, the contact direction of the truing material with respect to the truing grindstone W is diversified by the planetary motion of each base member 9 so as to be sharp. Sharpening becomes possible, truing workability is greatly improved, and the processing portion 9a made of diamond abrasive grains 10a
And the base member 9 having the processing part 9a formed of the GC abrasive grains 10b are mixed, so that at the time of truing, the tip of the abrasive grain of the truing-target grindstone W is formed by the diamond abrasive grains 10a. As a result of the micro-destruction, the excess bond adhered to the surface of the truing grindstone W is shaved off by the GC abrasive grains 10b. As a result, the sharpening of the truing grindstone W further progresses, and the grinding resistance immediately after truing is reduced and the workpiece is processed. Prevention of burning.

Embodiment 4 FIG. 5 is a perspective view showing the structure of a truing device according to a fourth embodiment of the present invention.

The truing device 1 according to this embodiment has basically the same structure as that of the truing device according to the first embodiment, but includes six base members 9.
Of the three processing members 9a are made of diamond abrasive grains 10a, and the remaining three base members 9 are processed parts 9a made of GC abrasive grains 10b via rubber elastic members 9b. Is formed. And a base member 9 having a processing portion 9a of diamond abrasive grains 10a;
Working part 9 composed of C abrasive grains 10b and interposed with elastic member 9b
The base members 9 provided with a are alternately arranged.

According to the truing apparatus 1 having such a structure, similarly to the apparatus according to the first embodiment, the contact direction of the truing material is diversified by the planetary motion of each base member 9 so that sharp sharpening can be performed. The truing workability is greatly improved, and the pressing force of the GC abrasive grains 10b against the truing grindstone W can be reduced by the elastic member 9b. When the truing grindstone W comes into contact with the diamond abrasive grains 10a, the cutting direction and The molding proceeds while being pushed back in the opposite direction,
0b is pushed back in the cutting direction by the elastic member 9b.
Only the bond of the above can be scraped deeper.

Embodiment 5 FIG. 6 is a perspective view showing the structure of a truing device according to a fifth embodiment of the present invention.

In the truing apparatus 1 according to this embodiment, three processing portions 9 out of the six base members 9 are used.
a is composed of diamond abrasive grains 10a, and for the remaining three base members 9, a processed portion 9a is formed by glass powder 10c.
The base members 9 provided with a and the base members 9 provided with the glass powder 10c are alternately arranged.

In the truing apparatus 1 having such a structure, when truing is performed, for example, on a metal-bonded diamond whetstone as the truing-target whetstone W, the excess bond adhering to the surface of the whetstone W is reduced by the glass powder 10c. Can be removed.

It should be noted that the truing-target grindstone W other than the metal-bonded diamond grindstone is provided with a glass powder 10c.
Other materials, such as mild steel, can be used.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional view showing a structure of a truing device according to a first embodiment of the present invention. (B) FIG.
FIG. 3 is a partially broken plan view showing a planetary gear mechanism in the truing device shown in FIG.

FIG. 2 is a perspective view showing the entire structure of the truing device shown in FIG.

FIG. 3 is a longitudinal sectional view showing a structure of a truing device according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing the entire structure of a truing device according to a third embodiment of the present invention.

FIG. 5 is a perspective view showing the entire structure of a truing device according to a fourth embodiment of the present invention.

FIG. 6 is a perspective view showing the entire structure of a truing device according to a fifth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Truing apparatus 2 Housing 3 Motor (drive apparatus) 5 Shaft 7 Planetary gear 8 Internal gear 9 Base member 9a Processing part 9b Elastic member 10a Diamond abrasive (truing material) 10b GC abrasive (truing material) 10c Glass powder 12 rotation Member 13 circular opening

Claims (5)

[Claims] A shaft rotatably supported by a housing and rotated by a driving device; a shaft rotatably mounted on the shaft and meshing with an internal gear formed coaxially with the shaft on the housing;
A plurality of planetary gears that perform planetary motion in response to rotation of a shaft; and a base member that is detachably attached to the planetary gears and that performs planetary motion integrally with the planetary gears. Truing is provided on at least one of the base members. A truing device, wherein a processed part made of a material is formed. 2. A shaft rotatably supported by a housing and rotated by a driving device; a shaft rotatably mounted on the shaft, wherein fluid is applied to an inner peripheral surface of a circular opening formed coaxially with the shaft in the housing. A plurality of rotating members that are in contact with each other and perform planetary motion in accordance with the rotation of the shaft; and a base member that is detachably attached to the rotating members and performs planetary motion integrally with the rotating member. A truing apparatus characterized in that at least one processing part made of a truing material is formed. 3. The truing apparatus according to claim 1, wherein a base member provided with a processing portion in which the truing material has a different grain size or type is mixed. 4. The truing apparatus according to claim 1, wherein a base member provided with a processing portion is interposed via an elastic member. 5. The truing apparatus according to claim 1, wherein a base member having a processed portion made of a granular material having a lower hardness than the truing material is mixed.