JPH06190732A - Internal gear type grinding wheel for gear honing - Google Patents

Abstract

(57) [Summary] [Purpose] When dressing the internal gear type grinding wheel of a gear honing machine, visually confirm that all the parts that require dressing have been dressed. [Structure] A colored layer having a color different from that of the grindstone is applied to at least one of the inner diameter surface 2 and the tooth surface 3 of the internal gear type grindstone 1 of the gear honing machine, and dressing is performed until the coloring material does not remain in a necessary portion of the dressing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The invention of the present application relates to a grindstone, in particular,
The present invention relates to dressing of an internal gear type grinding wheel used for a gear honing machine.

[0002]

2. Description of the Related Art In recent years, in mass production of automobile gears, hard gear honing, which can correct deformation of heat-treated gears with high efficiency in order to reduce noise and increase efficiency, has been adopted. In particular, gear honing machines that use internal gear type grinding wheels with excellent productivity have come into wide use.

As shown in FIG. 3, which shows the machining procedure, the center of the shaft is the head stock 14 and the tail stock 15.
Of the workpiece 4 (gear to be processed) rotatably instructed between the centers 16 and 17 provided on each of the Y axis (work table axis) parallel to the central axis O of the Y axis ( The honing grindstone 1 of the internal gear type, which is driven to rotate around the honing grindstone, is rotated in mesh with the honing grindstone 1 of the internal gear, and the work table 8 is also reciprocated in the Z-axis direction to pour the grinding fluid into the meshed portion. It is a machine that carries out honing processing.

In order to maintain the machining accuracy, it is necessary to always maintain an accurate grindstone tooth profile, and dressing is carried out with the internal gear type honing grindstone 1 attached to the machine before the start of machining and after every constant number of machining. It has become. As shown in FIGS. 2 (a) and 2 (b), the dressing procedure is as follows. First, in place of the work 4, an inner diameter dressing shaft 11 having a dressing ring 5 is mounted between the centers 16 and 17, and then the dressing shaft 11 is attached. As shown in FIGS. 2 (c) and 2 (d), the dressing ring 5 is rotated in contact with the inner diameter surface 2 of the internal gear type grinding wheel 1 to perform dressing of the inner diameter surface 2 which is the tooth tip surface.

Next, as shown in FIGS. 2 (e) and 2 (f), the dress gear 1 is provided between the centers 16 and 17 instead of the dress shaft for inner diameter.
2 is meshed with the internal teeth 3 of the internal gear type grinding wheel 1 and rotated to perform dressing of the tooth surface 3 which is the tooth surface of the grinding wheel.

[0006] After such a dressing ensures the required accuracy of the tooth length and tooth profile of the internal gear type grinding wheel 1,
Honing of the newly attached work 4 as shown in (g) and (h) is started.

[0007]

The dressing of the internal gear type grindstone 1 is usually performed before machining and periodically every 25 to 50 workpieces. In particular, in dressing before processing, since the internal gear type grindstone 1 is produced by sintering, distortion and twisting occur during the sintering, so that the tooth length of the internal gear type grindstone 1 and the required accuracy of the tooth profile can be improved. To ensure it, dressing was performed more than necessary. In addition, the internal gear type grindstone 1 has a complicated shape, and it is difficult to visually check the state of the inner diameter surface and the tooth surface during dressing. Even if the visual check is performed, the internal gear type grindstone 1 is the color of the material of the grindstone. However, it is not easy to judge that there is a portion where dressing or dressing is not performed due to distortion or twisting. Therefore, until now, it was unavoidable to secure the required accuracy of the tooth length and tooth profile of the internal gear type grinding wheel 1 by performing excessive dressing. Therefore, improvement of the actual operating time of the gear honing machine has been hindered.

The present invention solves the above-mentioned problems of the prior art, and when dressing an internal gear type grinding wheel,
An object of the present invention is to provide an internal gear type whetstone capable of reducing the time required for dressing by making it possible to confirm the completion of contact dressing of a whetstone with a dressing ring or a dressing gear.

[0009]

In order to solve the above problems, the invention of claim 1 of the present application will be described with reference to FIG. 1 corresponding to the embodiment. At least one of the inner diameter surface 2 and the tooth surface 3 is provided with a grindstone. This is an internal gear type grinding wheel 1 for gear honing with colored layers of different colors.

Further, according to the invention of claim 2, at least one of the inner diameter surface 2 and the tooth surface 3 is provided with a coloring layer having a color different from that of the grindstone,
This is a dressing method for an internal gear type grinding wheel for gear honing which visually confirms the completion of dressing by the dressing ring 5 for the inner diameter surface and the dressing gear 6 for the tooth surface by eliminating the colored portion.

[0011]

The dressing method of claim 2 will be described while explaining the manner of dressing the internal gear type grinding wheel 1 for gear honing in the above-described structure of the invention of claim 1.

Dressing is performed by rotating the inner diameter surface 2 of the internal gear type grinding wheel 1 by the dressing ring 5 and the tooth surface 3 by the dressing gear 6 to perform dressing.
The part where the dressing is performed is ground with the coloring material, so that it becomes the color of the material of the grindstone. However, in a portion of the internal gear type grindstone 1 where the internal gear type grindstone 1 is not dressed due to distortion, twist, or the like, the colored layer remains without being scraped. Therefore, the operator does not perform excessive dressing by performing dressing until it is possible to confirm that the colored layer in the portion requiring dressing is completely scraped off.

[0013]

FIG. 1 shows an embodiment of the invention of this application. Figure 1
[Fig. 3] is a partial enlargement of a donut-shaped internal gear type grinding wheel 1 for honing. The internal gear type grindstone 1 is composed of an inner diameter surface 2 formed by a surface which becomes a part of an arc and a tooth surface 3 each having an involute curve shape. Further, on the inner diameter surface 2 and the tooth surface 3 of the internal gear type grindstone 1, a colored layer is uniformly formed with a commercially available resin paint.

The type and material of the resin coating material are not limited at all, but in terms of workability when forming the colored layer, it is effective to color the resin coating material by the injection method in a spray can. Further, the color in coloring is not particularly limited, but if the internal gear type grinding wheel 1 is a white color, it is preferable that it is a color that can be clearly and easily discriminated, such as red, blue or black.

FIG. 2A is a front view of the gear honing machine 7 in a standard (standby) state, and FIG. 2B is a sectional view taken along the line bb. A head stock 14 having a center 16 mounted thereon is fixed on the work table 8 of the gear honing machine 7, and a tail stock 15 is fixed on the work table 8 so as to face the head stock 14 and a center 17 Is installed. Both centers 16 and 17
Between the dress shafts 11 and 12 instead of the work shaft 13.
Are sequentially attached, and the internal gear type grinding wheel 1 is dressed.

The internal gear type grindstone 1 is a collar 1 fixed to a grindstone holder 9 of a gear honing machine 7 with screws (not shown).
It is held by being sandwiched between 0 and 10.

A dress ring 5 having super-abrasive grains such as diamond fixed to the outer peripheral surface by electrodeposition or the like is attached to the dress shaft 11.
Is fixedly attached to the dressing shaft 12, and the dressing gear 6 to which the superabrasive grains such as diamond are similarly fixed to the outer peripheral surface by electrodeposition or the like is fixedly attached to the dressing shaft 12.

These dress ring 5 and dress gear 6
An internal gear type honing grindstone 1 is arranged so as to surround the outer side of the above, and the internal gear type honing grindstone 1 is attached to a grindstone head (not shown) of the honing machine 7 to rotate. The grindstone head moves forward and backward at a right angle to the work table 8 to adjust the distance between the internal gear type grinding wheel 1 and the work center axis O, and the work table 8 with respect to the internal gear type grinding wheel 1 and position. The movable range is longer than the distance between the headstock 14 and the tailstock 15.

In order to dress the internal gear type grinding wheel 1 of this embodiment, as shown in FIGS. 3 (a) and 3 (b), the dressing for inner diameter provided with the dressing ring 5 between the centers 16 and 17 is performed. The shaft 11 is attached, and then the outer peripheral surface of the dressing ring 5 and the inner diameter surface 2 of the internal gear type grinding wheel 1 as shown in FIGS.
While rotating and making contact, work table 8
By reciprocally moving in a small width in the Z-axis direction, the inner diameter surface 2 of the internal gear type grinding wheel 1 is dressed. At this time, dressing is performed until the paint that has colored the internal gear type grindstone 1 does not remain on all parts of the inner diameter surface 2.

After the dressing of the inner diameter surface 2 is completed, the inner diameter dressing shaft 11 is then removed, and the dressing shaft 12 having the dressing gear 6 is mounted between the centers 16 and 17, as shown in FIGS. As shown in, the dressing gear 6 and the internal gear type grinding wheel 1 are engaged and rotated, and the work table 8 is reciprocally moved in the Z-axis direction with a small width to dress the tooth surface 3 of the internal gear type grinding wheel 1. Done. At this time, dressing is performed until the paint that has colored the internal gear type grindstone 1 does not remain on all the parts of the tooth surface 3.

In this way, after the dressing of the inner diameter surface 2 and the tooth surface 3 of the internal gear type grinding wheel 1 is completed, the dressing shaft 12
Is removed and the work shaft 13 having the work 4 is attached between the centers 12 and 17, the work table 8 is returned to the center, and the work 4 is aligned with the position of the internal gear type grinding wheel 1.
The whetstone head is moved back and forth, and the work 4 and the internal gear type whetstone 1 are engaged and rotated as shown in FIGS. 3 (g) and 3 (h). Further, by reciprocating the work table 8 in the Z-axis direction, honing of the work 4 is performed.

In this embodiment, the dressing of the inner diameter surface 2 and the tooth surface 3 of the internal gear type grindstone 1 has been described, but in the case where only one of the inner diameter surface 2 and the tooth surface 3 needs to be dressed. It is sufficient to provide the colored layer only on the part to be dressed.

[0023]

As described above, according to the invention of this application, it is easy to perform dressing on all parts of the internal gear type grinding wheel when performing on-machine dressing of the internal gear type grinding wheel of the gear honing machine. Can be confirmed. Further, since it is not necessary to perform dressing more than necessary, the time required for dressing can be shortened and the operating efficiency of the honing machine can be improved. Furthermore, since unnecessary polishing due to excessive dressing is not performed, the life of the internal gear type grinding wheel can be improved.

[Brief description of drawings]

FIG. 1 is a front view of a main part of an embodiment of the invention of claim 1 of this application.

FIG. 2 is a diagram showing an example of this application, in which FIG.
Is a partial sectional front view of the reference state, (b) is bb of (a)
Line sectional view, (c) is a partial sectional front view at the time of dressing the inner surface of the grindstone, (d) is a sectional view taken along the line d-d of (c), (e)
Is a partial cross-sectional front view of the grinding wheel tooth surface during dressing, (f)
6A is a sectional view taken along line ff of FIG. 6E, FIG. 8G is a partial sectional front view of the workpiece during honing, and FIG. 8H is a sectional view taken along line hh of FIG.

FIG. 3 is an explanatory view showing a machining procedure of a gear honing machine using an internal gear type grinding wheel.

[Explanation of symbols]

 1 ... Internal gear type grinding wheel 2 ... Inner gear type grinding wheel inner diameter surface 3 ... Internal gear type grinding wheel tooth surface 4 ... Work piece 5 ... Dress ring 6 ... Dress gear 7 ... Gear honing machine

Claims (2)

[Claims] 1. An internal gear type grinding wheel for gear honing, wherein at least one of an inner diameter surface and a tooth surface is provided with a colored layer having a color different from that of the grinding wheel. 2. A colored layer having a color different from that of the grindstone is applied to at least one of the inner diameter surface and the tooth surface, and the completion of dressing by the dressing ring for the inner diameter surface and the dressing gear for the tooth surface is visually confirmed by eliminating the colored portion. Dressing method for internal gear type grinding wheel for gear honing.