JPH09174331A - Method and apparatus for aligning internal teeth of hard gear honing machine - Google Patents

Abstract

(57) [Abstract] [Problem] In a hard gear honing machine, local enlargement of the tooth groove due to the life of the internal tooth grindstone is eliminated, the tooth groove has a small runout, there is no fine waviness, and the surface roughness deteriorates. A method and apparatus for aligning teeth of an internal tooth grindstone. SOLUTION: A work 5 or a dress gear 6 and an internal tooth grindstone 1
The tooth stop position of the internal tooth grindstone when meshing is changed by sequentially shifting the teeth for each work processing or each dressing processing, and the tooth matching positions are almost evenly distributed to the inner teeth that can be fitted. . The detection of the tooth-matching stop position is performed directly on one axis of the internal tooth grindstone or on the axis of the internal tooth grindstone rotation motor 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external gear-shaped work or a dress gear during the work or dressing process of a hard gear honing machine for finishing the tooth surface of an external gear type quenching gear with high precision using an internal gear type grinding stone. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for engaging an internal gear-shaped internal tooth grindstone.

[0002]

2. Description of the Related Art Conventionally, an internal gear grindstone (hereinafter referred to as an internal tooth grindstone) is formed by inscribing an external tooth type gear after heat treatment to an external tooth type dress gear having substantially the same specifications as the workpiece. ) Is known, there is known a hard gear honing machine for finishing a work tooth surface by relatively moving tooth surfaces which are in mesh with each other. As shown in FIGS. 1 and 2, this apparatus is a headstock as shown in FIG. 1 in which a dress gear 6 in which tooth portions having the same specifications as the work 5 are coated (electrodeposited) with hard abrasive grains such as diamond abrasive grains is shown. 7 and the tailstock 8 are sandwiched between both centers of the internal tooth grindstone and rotated at a certain axis intersecting angle while being pressed against the tooth surface 21 of the internal tooth grindstone 1 to perform dressing (molding). The tooth surface 23 is transferred to the tooth surface of the internal tooth grindstone.

Next, the tooth surface of the dressed internal tooth grindstone 1 is sandwiched between the centers of the head stock 7 and the tail stock 8 by sandwiching the heat-treated external gear, which is the workpiece 5, between the centers of the head stock 7 and the tail stock 8. Finishing is performed by transferring the shape of the tooth flank 21 of the internal tooth grindstone 1 to the tooth flank 22 of the work 5 by pressing the internal tooth grindstone against the surface at an axis crossing angle. Therefore, if a certain number of workpieces 5 are machined, the accuracy of the tooth surface 21 of the internal tooth grindstone 1 is deteriorated, so dressing is periodically performed by the dress gear 6. The inner tooth grindstone 1 side is forcibly driven by the grindstone rotation motor 3 and the speed reducer 4 both during dressing and when working the workpiece, but the dress gear 6 and the work 5 are in a state of being freely rotatable. The gear honing process is performed by engaging with the gears (rotating following them).

When performing such gear honing, it is necessary to adjust the rotation stop positions of both the workpiece 5 or the dress gear 6 and the internal tooth grindstone 1 in advance so that they can mesh with each other. . Therefore,
The external tooth type work or dress gear is positioned by rotating the position by detecting the position with the proximity switch 13 by utilizing the unevenness of the gear (for example, JP-A-6-254719).

On the other hand, since the tooth to be detected on the side of the grindstone has teeth to be detected, a large number of proximity switches are provided to detect and position any rotational position of the grindstone.
According to Japanese Patent Laid-Open No. 63327, a whetstone drive gear for rotating the whetstone is provided outside the whetstone, and irregularities of the gear provided on the outer periphery of the whetstone are detected as in the case of the external gear described above.

Further, according to the NC control, as shown in FIGS. 1 and 2, the rotational position of the grindstone rotating motor shaft is controlled by utilizing the rotary shaft detector 14 of the shaft of the grindstone rotating motor 3 for rotating the grindstone shaft. By doing this, the teeth of the internal tooth grindstone 1 and the workpiece 5
Alternatively, the dressing gear 6 is engaged and positioned. For example, the position at which the workpiece 5 positioned by the detector 14 of the grindstone rotation motor 3 is engaged is stored in the NC device in advance, and the grindstone rotation motor 3 is stopped at this position. However, the grindstone rotating motor 3 is connected to the grindstone mounting portion (grinding head) 2 by a gear or a chain, a toothed belt 4 or the like at a reduction ratio of 1: 6 or the like. There are six origins on the internal tooth grindstone. Therefore, the fixed rotation stop positions on the stored grindstone rotation motor shaft are also six positions on the actual internal tooth grindstone.
Therefore, the grindstone positioning position of the grindstone rotation motor does not change from the time of replacement of the new internal tooth grindstone, but on the inner tooth grindstone, the rotational position is stopped at any of the six positions and the meshing is performed.

However, in some cases, depending on the number of teeth of the grindstone, an arbitrary position cannot be detected due to the reduction ratio. Therefore, in Japanese Unexamined Patent Publication No. 7-227716, the rotational position of the grindstone driving motor 3 for rotating the grindstone is controlled, and a detector is provided on the outer circumference of the inner toothed wheel shaft in a range corresponding to the reduction ratio. By stopping the grindstone rotation motor at a position that coincides with the axis position of the grindstone rotation motor, the internal tooth grindstone is stopped at a constant rotational position without being limited by the reduction ratio and the number of teeth of the internal tooth grindstone 1. Alternatively, the dress gear 6 and the internal tooth grindstone 1 are engaged with each other.

As described above, after the rotary positioning and meshing of the work or dress gear and the internal tooth grindstone are performed, the hard gear honing processing by the whirling is performed.
As the machining progressed and the life of the internal tooth grindstone was approached, the tooth space of the internal tooth grindstone tended to locally increase. That is, FIG.
Is a constant positioning (6 meshing positions) on the grindstone rotation motor shaft, and records the runout of the tooth groove of the internal tooth grindstone 1 in which 480 workpieces are machined and 40 more workpieces are machined after redressing. However, there is a problem that the tooth space is locally enlarged as indicated by the shaded portion 41 and the mesh portion 42 shown in FIG.

[0009]

When a workpiece is machined with such an internal tooth grindstone, the error of the tooth groove of the internal tooth grindstone is transferred to the workpiece, and the same measurement is performed on the external tooth as shown in FIG. As the number of machining increases, the deviation of the workpiece tooth groove is large, and the deviation of the workpiece tooth groove is large.
In addition, there is a problem that fine swell occurs. The measured workpiece specifications are module 2.0, pressure angle 1
4.5 °, the number of teeth is 50, the helix angle is 32 ° (left twist), the tooth width is 17 mm, the internal gear type grinding stone specifications are the number of teeth 144, the helix angle is 19.8 ° (left helix), and the tooth width is 28 mm.

Further, FIG. 8 shows a state in which the work 43 is engaged with the portion 43 of the internal tooth grindstone 1 in which the tooth groove is not enlarged, and the grindstone tip 44 and the work tooth bottom 45 are shown. 9 shows a normal state with a clearance 46, while FIG. 9 shows a state in which the tooth groove enlarged portion 47 of the internal tooth grindstone 1 and the work 5 are engaged with each other. Four
8 interferes with the work tooth bottom 49, and in this state, backlashes 50 and 51 are generated in the tooth thickness direction. As described above, since the backlashes 50 and 51 are generated in the work 5 and the grindstone 1, there is a problem that vibration during machining becomes large and surface roughness deteriorates.

An object of the present invention is to eliminate the local enlargement of the tooth groove due to the life of the internal tooth grindstone, the error of the internal tooth grindstone tooth groove is transferred to the work, and the runout of the work tooth groove is small and the fine waviness The present invention provides a simpler processing method and apparatus, in which the backlash between the work and the grindstone is suppressed, the vibration during processing is reduced, and the surface roughness is not deteriorated.

[0012]

Means for Solving the Problems As a result of research including the above measurement, the present inventor has found that the above-mentioned expansion of the tooth groove of the internal tooth grindstone is caused by the tooth of the grindstone meshing with the work or the dress gear.
Since it is always in the same place until the grindstone is replaced, the damage caused by one meshing will accumulate as the number of machining increases, and since the grindstone will rotate and stop at the meshed position, the rotation The inertia force during deceleration is always received by the same tooth,
We have found that the wear of the grindstone becomes strong locally and the tooth groove of the grindstone tends to expand locally as the life of the grindstone approaches. Further, according to FIG. 6 described above, while the number of teeth of the internal tooth grindstone is 144, the enlargement of the tooth gap appears in a combination of two teeth at a period of 24 teeth divided into six equal circles, From this, too, this knowledge was expected to be correct.

Therefore, in order to achieve the above-mentioned object in the present invention, based on this knowledge, an external tooth type dress gear having substantially the same specifications as the workpiece of the external tooth type gear after heat treatment is provided. In a hard gear honing machine for intermeshing an internal gear grindstone formed by inscribing and relatively moving the interlocking tooth flanks to finish a workpiece tooth flank, the external gear-shaped work or the dress gear and the internal gear-shaped internal tooth grindstone When meshing, the tooth position of the internal tooth grindstone that meshes with the positioned work or dress gear is changed for each work processing or dressing processing, and the tooth matching position is almost equal to each tooth that can be fitted. The problem was solved by even distribution (Claim 1).

(Operation) Since the work or dress gear and the grindstone do not always mesh at the same position for each machining, concentrated damage of the grindstone caused by the fixed meshing and local wear at the time of rotational acceleration / deceleration are prevented. To be done.

Further, when the workpiece or the dress gear and the internal tooth grindstone are meshed with each other, if the tooth of the internal tooth grindstone meshed with the workpiece or the dress gear positioned at the meshing position is sequentially shifted by one tooth for each workpiece machining or each dressing. Good.
In this case, the meshing position can be shifted by a simple control for sequentially sending the tooth positions (claim 2).

Further, a grindstone driving means for rotationally driving the internal gear grindstone, a motor connected to the driving means for supplying a rotational force to the driving means, a rotational position detector for the motor output shaft, and the rotational position detection. In a hard gear honing machine having a control means for feeding back a machine signal to control the motor to an arbitrary rotational position, when the work or dress gear is meshed with the internal tooth grindstone, the work or dress gear positioned is meshed. The tooth of the internal tooth grindstone to be set is detected at the output shaft position of the motor for each work machining or each dressing, and is stopped.

In this case, since the speed reducer is interposed between the internal tooth grindstone and the motor, the rotation stop position for meshing the internal tooth grindstone is the meshing position with any of the teeth in the range divided by the reduction ratio. Flies. However, since it does not stop at the same position on the output shaft of the motor until the number of teeth divided by the reduction ratio is reached, the same tooth is not positioned on the internal tooth grindstone (claim 3). .

Further, in order to achieve the above-mentioned method, in the hard gear honing machine, it is possible to control the rotation stop position for meshing over a part or the entire range of two teeth of the internal tooth grindstone. And means for detecting the rotation stop position, and command means for instructing the rotation stop position,
Means for stopping the rotation of the internal tooth grindstone at the rotation stop position according to the command, and the command means for instructing the rotation stop position without overlapping until the rotation stop position control completes one cycle. Is provided (claim 4).

Further, more simply, in a hard gear honing machine, a rotational position detector for detecting the rotational position of a rotation driving motor for an internal tooth grindstone, and an output of the rotational position detector are fed back to feed back the motor. Rotation stop position control means, initial value storage means for storing the output of the rotation stop position detector at the initial tooth engagement stop position of the internal tooth grindstone, and one tooth of the internal tooth grindstone of the motor for each work replacement. It is preferable to provide means for sequentially adding the corresponding rotation stop positions and means for instructing the rotation stop position control means of the motor of the sum of the initial value and the addition result (claim 5).

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described with reference to the drawings for the sake of simplicity of description with reference to the drawings for machining a workpiece whose stop position is controlled on a grindstone rotary motor shaft according to claims 3 and 5. To do. 1 and 2 are schematic explanatory views of a gear honing machine according to the method and apparatus of the present invention. As shown in the figure, the internal gear type grindstone 1 is mounted on a grindstone head 2 and receives a rotational driving force by a grindstone rotation (servo) motor 3 and a grindstone shaft speed reducer 4. On the other hand, the work 5 or the dress gear 6 is sandwiched between the centers of the head stock 7 and the tail stock 8. The main shaft 9 provided on the headstock 7 is connected with a clutch device, a main shaft reduction device 10, a main shaft (servo) motor 11 and the like, which are not shown, and receives the driving force of the main shaft motor and the work 5 through a gripping device.
Alternatively, the dress gear 6 is rotatable. A clutch device between the main shaft reduction device 10 and the main shaft 9 is provided for turning on and off the driving force from the main shaft motor 11.

The grindstone rotating motor 3 and the spindle motor 11 are adapted to obtain appropriate rotations by the NC controller. Although not shown, the NC control device has a table feed servo motor capable of moving a table 12 on which a head stock 7, a tail stock 8 and the like are additionally mounted, and a cutting servo for adjusting an axial distance between a grindstone shaft and a spindle. A motor, a control mechanism for adjusting the axis crossing angle, and the like are provided. Also,
A proximity sensor 13 for detecting the tooth position is provided for indexing the tooth of the work 5 or the dress gear 6. A rotation position detector (pulse encoder, rotary encoder, etc.) 14 is provided on the shaft of the grinding wheel rotation motor in order to control the rotation of the grinding wheel rotation motor 3 and detect the rotation position of the teeth of the internal tooth grinding wheel 1. The output signal of the rotation position detector 14 is fed back for rotation control.

Further, in the NC device, an initial value storage unit for giving an initial value of the rotation stop position of the grindstone rotation motor shaft during machining of the work, and an addition unit for sequentially adding the rotation position of one tooth every time the machining of the work is completed. A rotation stop position storage unit that stores the sum of the value of the initial value storage unit and the addition unit; and a rotation amount determination unit that returns the value to 0 when the value of the addition unit exceeds one rotation of the grindstone motor shaft. The rotation stop position of the whetstone during meshing is stopped at the value of the rotation stop position storage unit. The initial value is the value when the grindstone is attached or is automatically set by the detector, and the correlation between the grindstone rotation motor shaft and the teeth of the internal tooth grindstone is calculated and input in advance. The detection position of the proximity sensor 13 and the shaft stop position of the grindstone rotation motor 3 described above are, of course, set to positions where the teeth of the internal gear grindstone 1 and the work 5 or the dress gear 6 mesh with each other.

In such a construction, first, the tail stock 8 and the headstock 7 are fixed at a predetermined axis crossing angle so that the spindle 15 of the headstock 7 approximately coincides with the center of the internal tooth grindstone 1, and the work 5 is fixed to the tailstock and the headstock. Hold it in between. Next, with the clutch engaged, the spindle 9 of the headstock 7 and the spindle motor 11 are connected, and the work drive device 10
The work 5 is rotated at a low speed and the work is positioned by stopping the work 5 at a certain position in response to the ON-OFF signal of the proximity switch 713.

As shown in the flowchart of FIG. 3, the position at the time of mounting the internal tooth grindstone is previously input to the rotation stop position command of the grindstone motor shaft which meshes with this (step 61), and the value of the addition section is It is set to 0 (step 62). In the first work, the value of the addition unit is 0, the initial value of the initial value storage unit is output to the rotation stop position storage unit (step 63), the internal tooth grindstone is minutely rotated, and the grindstone drive motor shaft is rotated. Is stopped at the initial value position (steps 65 and 66). As a result, the tooth bottom 16 of the internal tooth grindstone 1 and the tooth top 17 of the work 5 are substantially aligned with each other. Next, the clutch is disengaged to free the main shaft 9 to free the work 5, and the servomotor for cutting is operated to reduce the axial distance between the grindstone shaft and the main shaft 15 to reduce the tooth surface of the work to the tooth of the internal tooth grindstone. Pushing the tooth surface of the gap with zero backlash to complete the meshing.

Then, a rotation command is given to rotate the internal tooth grindstone 1 to rotate the workpiece 5 (driven rotation), and the inter-axis distance is gradually shortened by a cutting servo motor to cut to a predetermined cutting depth. Put in. After sparking out, the rotation of the grindstone is stopped, the internal tooth grindstone and the work are returned to their original positions, and the processing is completed (steps 67 and 68). The stop position of the axis of the grindstone rotation motor 3 at this time may be an arbitrary position, but it is preferable to stop at the value of the position storage section for easy control.

For the second work, the amount of movement corresponding to one tooth of the grindstone is added to the value of the addition section (step 69), and the rotation stop position storage section stores the initial value of the initial value storage section and one tooth of the grindstone. Is output (step 63), the internal tooth grindstone 1 is minutely rotated, and the stop position of the grindstone rotation motor shaft is advanced by one tooth to the stop position of the first work, and stopped. The workpiece is processed by positioning and meshing with each other (steps 65 to 68).

For the third work, the movement amount corresponding to one tooth of the grindstone is further added to the position stored in the position storage section by the adding section (step 69), and the movement corresponding to the two tooth of the grindstone is added to the initial set value. It is stopped at the rotational position where the amount is added (steps 63 to 66). In this way, 1 is added to the addition section for the fourth and subsequent ones.
The tooth equivalents of the teeth are added, and the rotation stop positions of the teeth of the internal tooth grindstone are shifted by one and machined. When the rotation stop position reaches the movement amount for one rotation of the grindstone rotation motor (step 64), the value of the addition unit is returned to 0 (step 62) and the value of the rotation stop position storage unit is changed from the initial value again. Be started.

As described above, according to the present invention, the work 5 is processed by shifting the meshing position of the teeth of the internal tooth grindstone 1 by one tooth for each processing. However, in this case, since the reduction ratio is, for example, 1: 6, even if the teeth of the grindstone rotation motor 3 are moved by one tooth, the tooth of the internal tooth grindstone 1 will have any of the six divided parts. It is not possible to specify whether they will engage. However, until the movement by the number of teeth divided into six ends, no matter which divided region the tooth is in, the tooth stop positions are sequentially moved, so that the same tooth does not mesh.

[0029]

EXAMPLES Now, the results of the case where the above-mentioned grindstone driving motor shaft is moved by one tooth and machined will be described. FIG. 4 shows the measurement of the tooth groove runout of the internal tooth grindstone (the number of teeth is 144) having the same specifications as those of FIG. 6 described in the conventional example. As shown in FIG. 4, there is no local enlargement of the tooth space, and a smooth sine curve is shown. Further, when a work is machined with this internal tooth grindstone, the number of machining is the first (a), 10 (b), 20 (c) as shown in FIG. 5 as compared with FIG. 7 described in the conventional example. ), 30 (d), and 40 (e), the amount of shake was small and it was greatly improved. In addition, the fine waviness of the work tooth groove was eliminated.

Although the processing of the internal tooth grindstone and the work has been described, it goes without saying that it can be applied to the dressing of the dress gear and the internal tooth grindstone. However, in the case of dressing, it is not performed continuously, but is performed once after an appropriate amount of work is processed, so it is necessary to separately prepare a storage unit such as an initial setting unit dedicated to dressing.

Further, although the rotation stop position is moved by one tooth on the grindstone drive motor shaft, instead of the adding means described above, an arbitrary number of rows (for example, two teeth, three teeth, (Random number) is stored in advance for each machining of the work to specify the rotation stop position, or if a random number is output and the same number is output, the random number is output again so that the rotation stop positions do not overlap. It does not have to overlap so as not to exceed one rotation of the grindstone rotation motor shaft. However, from the viewpoint of easiness of programming and checking the tooth position of the internal tooth grindstone, it is preferable to move one tooth at a time.

Next, another embodiment will be described. In the above-described first embodiment, even if one tooth is moved in the grindstone rotation motor shaft due to the reduction ratio,
In the tooth of the internal tooth grindstone, it is not possible to specify which part of the 6-divided parts meshes. Therefore, after the movement of the number of 6-divided teeth has ended, there will be some teeth that overlap and some do not mesh. Occurs, and the whole teeth do not mesh evenly.
However, as described in the embodiment, sufficient accuracy can be obtained by the method of moving one tooth on the grindstone drive motor shaft, as described above.

Therefore, even if the internal tooth grindstone is the whole or a part of the inner tooth grindstone instead of the motor shaft of the grindstone, it is possible to perform more accurate machining in a device capable of controlling the meshing stop position of the inner tooth grindstone itself. For example, as described in the related art, the rotation stop positions of the teeth of the internal tooth grindstone may be directly detected by a large number of proximity switches, rotary encoders and the like. This detection stop position may be all or some of the teeth of the internal tooth grindstone. In addition, as described in Japanese Patent Laid-Open No. 7-227716, a proximity switch for detecting the position of an internal tooth grindstone divided by a reduction ratio and a rotation detector of a grindstone rotation motor shaft are combined. If so, the stop position can be directly detected by the position of the internal tooth grindstone. In such a configuration, it is needless to say that more accurate machining can be performed because not only the rotation stop position command on the grindstone rotation motor shaft but also the control so that the teeth of the internal tooth grindstone do not overlap. Note that, except for the difference in the detection position, it is the same as in the above-described first embodiment, so description will be omitted.

If all the teeth can be detected, the size of the device will be too large. However, instead of shifting the meshing position of the internal tooth grindstone by one tooth, it moves in a star-shaped manner at opposite positions,
If a program or the like is set so as to make the tooth meshing positions uniform by randomly moving the teeth, more uniform and highly accurate hard gear honing can be performed.

[0035]

In the present invention, when meshing the workpiece or the dress gear with the internal tooth grindstone, the tooth position of the internal tooth grindstone meshing with the positioned workpiece or the dress gear is changed for each work processing or each dressing processing, In addition, the tooth-matching positions are almost evenly distributed among the inner teeth that can be tooth-matched, and the work or dress gear and the grindstone do not always mesh at the same position for each machining. Concentration of damage to the grindstone that occurs at the time of rotation and local wear during rotation acceleration / deceleration are prevented, and the local expansion of the tooth groove of the inner grindstone is eliminated, and there is no fine waviness in the runout of the workpiece tooth groove. (EN) A method and a device for engaging an internal tooth grindstone that suppresses backlash, reduces vibration during processing, and does not deteriorate surface roughness.

Further, if the meshing position is sequentially shifted one tooth at a time, the meshing position can be shifted by a simple control, so that the program of the NC controller or the like is simple.

Further, the rotation position stop of the internal tooth grindstone when the workpiece or the dress gear and the internal tooth grindstone are meshed is detected by the output shaft position of the internal tooth grindstone rotation motor, and the number of teeth is divided by the reduction ratio until the number of times is reached. Does not stop at the same position on the output shaft of the motor so that the same tooth does not stop at the meshing position on the internal tooth grindstone, so no special detector or control device is required, and the NC program is modified. Since it is good, the machining accuracy can be improved more easily and the cost efficiency is higher.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a gear honing machine used in a method of the present invention.

FIG. 2 is a schematic explanatory view of a gear honing machine used in the method of the present invention.

FIG. 3 is a flowchart relating to a rotation stop position according to the first embodiment of this invention.

FIG. 4 is a diagram showing a measurement result of wobbling of a grindstone tooth groove after the internal tooth grindstone of the present invention is processed.

FIG. 5 is a diagram showing a result of accuracy measurement of runout of a tooth groove of a work after processing according to the present invention.

FIG. 6 is a diagram showing a measurement result of a runout of a grindstone tooth groove after a conventional internal tooth grindstone is machined.

FIG. 7 is a diagram showing a conventional result of accuracy measurement of runout of a tooth groove of a work after machining.

FIG. 8 is a partial explanatory view showing a state of engagement between the internal tooth grindstone and the work in a portion where the tooth groove of the conventional internal tooth grindstone is enlarged.

FIG. 9 is a partial explanatory view showing a meshing state of the internal tooth grindstone and the work in a portion where the tooth groove of the conventional internal tooth grindstone is not enlarged.

[Explanation of symbols]

 1 Internal gear type grindstone (internal tooth grindstone) 2 Grindstone head (grindstone mounting part) 3 Grindstone rotation (servo) motor 4 Grindstone drive means (grindstone drive device) 5 Work piece 6 Dress gear 13 Proximity switch 14 Rotation position detector

Claims (5)

[Claims] 1. A tooth surface for intermeshing a workpiece of an external gear after heat treatment by meshing an internal gear grindstone formed by inscribed with an external gear dress gear having substantially the same specifications as the workpiece. In a hard gear honing machine that finishes the workpiece tooth surface by relatively moving, when meshing the external gear-shaped work or the dress gear and the internal gear-shaped internal tooth grindstone, the meshed with the positioned work or dress gear The hard gear honing machine is characterized in that the tooth position of the internal tooth grindstone is changed for each work processing or each dressing processing, and the tooth-matching stop position is distributed almost evenly to each controllable internal tooth. How to align the work or dress gear with the internal grinding wheel. 2. The means for evenly distributing, when meshing an external gear-shaped work or dress gear and an internal gear-shaped internal tooth grindstone, the teeth of the internal tooth grindstone that mesh with a positioned workpiece or dress gear. 1 per process or dressing
2. The method for aligning an internal tooth grindstone of a hard gear honing machine according to claim 1, wherein the teeth are sequentially shifted. 3. The hard gear honing machine comprises: a grindstone driving means for rotating and driving the internal tooth grindstone; a grindstone driving motor connected to the driving means for supplying a rotational force to the driving means; and a motor output shaft of the motor output shaft. A rotation position detector and a control means for feeding back the rotation position detector signal to control the motor to an arbitrary rotation position, the external gear-shaped work or dress gear and the internal gear-shaped internal gear. When meshing a tooth grindstone, the teeth of an internal tooth grindstone that meshes with the positioned work or dress gear are positioned at the output shaft position of the motor for each work machining or dressing. Item 3. A method for aligning an internal tooth grindstone of a hard gear honing machine according to Item 1 or 2. 4. A tooth surface for intermeshing with a work of an externally toothed gear after heat treatment by meshing an internal gear grindstone formed by inscribed with an externally toothed dress gear having substantially the same specifications as the workpiece. In a hard gear honing machine that relatively moves to finish a work tooth surface, a rotation stop position control for meshing is possible over a part or the whole range of more than two teeth of the internal tooth grindstone, and Means for detecting the rotation stop position, command means for instructing the rotation stop position,
Means for stopping the rotation of the internal tooth grindstone at the rotation stop position according to the command, and the command means for instructing the rotation stop position without overlapping until the rotation stop position control completes one cycle. A gear aligning device for an internal tooth grindstone of a hard gear honing machine, which is characterized by having: 5. A tooth surface for intermeshing a workpiece of an external gear after heat treatment by meshing an internal gear grindstone formed by inscribed with an external gear dress gear having substantially the same specifications as the workpiece. In a hard gear honing machine that relatively moves to finish the work tooth surface, a rotation position detector that detects the rotation position of the motor for rotating the internal tooth grindstone, and the rotation of the motor by feeding back the output of the rotation position detector. A stop position control means, an initial value storage means for storing the output of the rotation stop position detector at the initial tooth engagement stop position of the internal tooth grindstone, and one tooth of the internal tooth grindstone of the motor for each work replacement. Of the hard gear horn, and means for instructing the rotation stop position control means of the motor the sum of the initial value and the addition result. Tooth aligning device for the internal grinding wheel of the grinding machine.