JPH07227716A - Grinding wheel stop contoller of gear honing machine - Google Patents

Abstract

PURPOSE:To conduct by means of compact structure the accurate automatic stop of a grinding wheel at a predetermined rotary phase that is meshable with a work without relation to its tooth number. CONSTITUTION:A motor sprocket 28 on a grinding wheel drive motor 24 side is connected to a ring sprocket 16 on an internal gearlike grinding wheel 20 side, and the grinding wheel 20 is rotated by means of the grinding wheel drive motor 24. The tooth number of the motor sprocket 28 is set at the I/N (N is a natural number of more than 2.) of the tooth number of the ring sprocket 16. A detected projection portion 22a is formed at an angle sphere whose center angle alpha is less than 360 deg./N in a dewatering slab 22 provided on the grinding wheel 20 side, and a grinding wheel detector 78 to detect this is arrange at a predetermined angle position. The grinding wheel drive motor 24 is controlled so that the grinding wheel 20 may be stopped at a time point when the grinding wheel detector 78 detects the detected projection portion 22a and the rotary phase of the motor sprocket 28 coincides with a predetermine grinding wheel stop phase.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear honing machine for machining a gear-like work surface with an internal gear-like grindstone meshing with the surface of the gear so as to automatically stop the rotation of the grindstone at a suitable position. The present invention relates to a whetstone stop control device.

[0002]

2. Description of the Related Art Conventionally, a gear honing machine is known as a means for finishing the tooth surface of a gear-shaped work. For example, when machining an external gear-shaped work, this device prepares an internal gear-shaped grindstone that meshes with this work, and moves the work in the cutting feed direction to a position where the grindstone meshes with the grindstone until there is no backlash. The tooth surface of the work is machined by moving the work to a grinding wheel and rotating the work with a grindstone while performing the cutting feed.

By the way, in order to perform such gear honing, it is necessary to preliminarily adjust the rotational phases of the grindstone and the work so that they can mesh with each other.
Here, conventionally, while the operator visually checks the tooth portion of the grindstone and the tooth portion of the work, the rotational phase of the grindstone and the work is manually adjusted so that the two mesh with each other.
Skillful work is required to perform such work accurately, and work efficiency is poor.

Therefore, in Japanese Utility Model Laid-Open No. 4-63327, a grindstone drive gear for rotating the grindstone is fixed to the outside of the grindstone, and the grindstone drive gear is located at a position facing the tooth flank of the grindstone during rotation. A sensor that detects the height position of the outer peripheral surface of the whetstone drive gear (that is, the concavo-convex state) is provided. By stopping the grindstone at the time when it becomes, the stop position of the grindstone is automatically matched with a predetermined angular position. Compared to this grindstone, the external gear-shaped work can be relatively easily automatically stopped at a predetermined rotation phase, so that the work is stopped in advance at a rotation position where it can mesh with the grindstone at the stop position. By setting it, it becomes possible to automatically position the grindstone and the work at a rotational position where they can be meshed with each other.

[0005]

As in the device disclosed in the above publication, in order to stop the grindstone at the rotational position where its tooth portion can mesh with the tooth portion of the workpiece by detecting the uneven state of the grindstone driving gear. , The number of teeth of the grindstone drive gear must be set to be an integral fraction of the number of teeth of the grindstone. If it is a whole number
If this is not the case, for example, even if the grindstone is stopped when the sensor detects the tooth bottom surface of the grindstone drive gear, the teeth of the grindstone will not necessarily stop at the predetermined angular position.

However, since the number of teeth of the grindstone is set to a predetermined value according to the workpiece to be machined due to the gear honing process, the number of teeth of the grindstone drive gear is significantly restricted based on the number of teeth of the grindstone. Therefore, the design of the whetstone drive gear may become extremely difficult in some cases. Conversely, depending on the workpiece, the number of teeth of the grindstone cannot be set, and there is a possibility that machining cannot be performed.

As a means for avoiding such an inconvenience,
It is conceivable to directly detect the rotational phase of the rotary shaft of the grindstone with a rotary encoder or the like, but this grindstone is an internal gear that meshes with an external gear-shaped workpiece, and therefore generally has a ring shape with a very large inner diameter. Since it is formed in
In order to detect the rotation phase of the rotation axis (virtual rotation axis) of such a grindstone, a large-sized rotation detection means is required, and the device becomes very large.

In view of such circumstances, the present invention provides a grindstone stop control device in a gear honing apparatus capable of accurately stopping the grindstone at a predetermined rotation phase capable of meshing with a work with a compact structure. The purpose is to

[0009]

According to the present invention, an internal gear-shaped grindstone for machining a tooth surface of a work by rotating while meshing with a gear-shaped work, and a grindstone drive means for rotationally driving the grindstone. A gear honing apparatus comprising at least a plurality of toothed transmission wheels fixed to the whetstone side and the whetstone driving means side and interconnected to transmit the driving force of the whetstone driving means to the whetstone, The number of teeth of a specified toothed drive wheel, excluding the toothed drive wheel fixed to the grindstone side, is 1 / the number of teeth of the toothed drive wheel fixed to the grindstone side.
A rotation detection transmission wheel that is N times (N is a natural number of 2 or more), rotation phase detection means for detecting a rotation phase of the rotation detection transmission wheel, and at least one pitch of teeth of the grindstone in the grindstone and a central angle. Is less than 360 ° / N, an angle region detecting means for detecting whether or not the specific angle region is at the predetermined angle position, and the rotation detection transmission of the rotation detection transmission wheel, which is detected that the specific angle region is at the predetermined angle position. It is provided with a grindstone stop control means for stopping the rotation of the grindstone when the rotation phase reaches a preset grindstone stop phase (claim 1).

This apparatus is provided with a grindstone driving motor having a built-in rotational phase detecting means for detecting the rotational phase of the motor output shaft as the grindstone driving means, and a toothed transmission wheel fixed to the output shaft of the grindstone driving motor. Is preferably the rotation detecting transmission wheel (claim 2).

Further, a storage command means for outputting a storage command signal in response to an operation from the outside, and when the storage command signal is output by the storage command means, it is detected by the rotation phase detecting means at the time of output. By providing the stop position storage means for storing the rotation phase as the grindstone stop phase, a more excellent effect as described later can be obtained (claim 3).

As a specific structure for detecting the specific angle region, a grindstone bearing for rotatably supporting the grindstone from the outside in the radial direction, a grindstone bearing fixed to the grindstone side, and supplied during gear honing. With a water cutting plate arranged at a position to prevent coolant from entering the grindstone bearing, as the angle region detecting means, a portion of the water cutting plate that corresponds to the specific angle region has a diameter larger than that of other portions. It is preferable to form the detected protrusion by projecting outward in the direction, and to provide a protrusion detection means for detecting whether or not the detected portion is present at the predetermined angular position. ).

In each of the above-mentioned devices, the speed at which the grindstone driving means drives the grindstone to rotate is switched to a preset work machining speed at the time of machining the work, and the grindstone stop control means controls the speed at which the grindstone is stopped from the work machining speed. It is further preferable to include a grindstone speed control means for switching to a speed for controlling the grindstone stop which is even lower (Claim 5).

It is preferable that each of the above-mentioned devices is provided with means for accurately positioning the rotational position of the work. As this means, the work drive means for rotationally driving the work, and the drive force of the work drive means are described above. Clutch means capable of switching between a state in which the work is transmitted to the work and a state in which the work drive means and the work are separated to freely rotate the work, and the rotation phase of the work when the work is rotationally driven by the work drive means. And a work stop control means for stopping the rotation of the work when a preset work stop phase for meshing with the grindstone is reached (claim 6).

[0015]

According to the apparatus of the present invention, the number of teeth of the rotation detecting transmission wheel whose rotational phase is detected by the rotational phase detecting means is 1 / N of the number of teeth of the toothed transmission wheel fixed to the grindstone side. Since it is a multiple (N is a natural number of 2 or more), when the grindstone is stopped in a state where the rotation phase of the rotation detection transmission wheel is in a predetermined grindstone stop phase, the grindstone rotation phase at this stop is N There will be streets. However, the grindstone control means determines that the rotation angle of the rotation detection transmission wheel matches the grindstone stop phase, and in the grindstone, a specific angle region having a pitch of 1 tooth or more of the grindstone and a central angle of less than 360 ° / N. Since the whetstone is stopped only when it is detected that the whetstone is at the predetermined angle position, the whetstone rotation phase when the whetstone is stopped is limited to one. That is, the grindstone can be exactly stopped at a predetermined rotation phase. Therefore, if the workpieces are stopped in advance in a rotation phase that allows meshing with the grindstone at the stop position, these workpieces and the grindstone can automatically mesh with each other.

Here, since the number of teeth of the rotation detecting transmission wheel is 1 / N of the number of teeth of the toothed transmission wheel fixed to the grindstone side, the number of teeth is greater than that in the case where the rotational phase of the grindstone is directly detected. A smaller phase detecting means can be used. Particularly, in the apparatus according to claim 2, the rotation detection transmission wheel is a toothed transmission wheel fixed to the output shaft of the grindstone drive motor, and the rotation phase of the output shaft of the output shaft is detected as the grindstone drive motor. Since the one that incorporates the rotational phase detecting means is used, the structure becomes more compact.

Further, in the apparatus according to the third aspect of the invention, when the apparatus is started to be used or immediately after the wheel is exchanged, the wheel is manually rotated to a rotational position where it meshes with the work, and in this state the storage command means is operated. By operating and outputting the memory command signal, the detected rotation phase of the rotation phase detection means in the present state is stored as the grindstone stop phase as it is, and thereafter the grindstone stop similar to the above is automatically based on this grindstone stop phase. Control will be executed.

According to the fourth aspect of the present invention, the detected protrusion is provided only in the specific angle region from the water cutting plate for preventing the coolant from entering the grindstone bearing, and the detected protrusion is located at the predetermined angular position. Whether or not the specific angle area is at the predetermined angular position is detected depending on whether or not the specific angle area is present.

In the apparatus according to the fifth aspect of the present invention, when the grindstone stop control means controls the grindstone stop, the rotational drive speed of the grindstone is switched to the grindstone stop control speed rather than the workpiece machining speed. It will be controlled more accurately.

In each of the above devices, it is necessary to accurately obtain the rotation stop position of the grindstone by the above-mentioned configuration, and also to stop the work accurately at a predetermined rotation phase. Here, in the device according to claim 6, , The driving force of the work drive means is transmitted to the work through the clutch means, and while rotating the work in this way, the rotation of the work is stopped when the rotation phase of the work reaches a predetermined work stop phase. By stopping, this work can be brought into a state in which it can be meshed with the grindstone. After that, after engaging the work and the grindstone, the clutch means separates the work from the work driving means into a free rotation state, and in this state, if the grindstone driving means rotates the grindstone, the work is synchronized with this grindstone. Is driven to rotate and its tooth surface is automatically machined.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

The gear honing apparatus shown in this embodiment includes a grindstone support housing 10, and the grindstone support housing 10 is provided with a hollow ring portion 12. Inside the ring portion 12 in the radial direction, a pair of left and right grindstone bearings 14 as shown in FIG.
A ring sprocket (toothed transmission wheel fixed to the grindstone side) 16 having is provided rotatably, and a grindstone 20 is fixed to a radially inner side of the ring sprocket 16 by a grindstone retainer 18.

The grindstone 20 is in the shape of an internal gear as shown in FIG. 3, and is designed to rotate integrally with the ring sprocket 16. In addition, the ring sprocket 1
A doughnut-shaped water drainage plate 22 is fixed to the left and right side surfaces of 6. In order to prevent the coolant sprayed toward the grindstone 20 from entering the grindstone bearing 14 through the gap 13 between the sprocket 16 and the ring portion 12 during machining, the water cutting plate 22 is provided with the gap 13 from the side. It is provided at the position to cover.

On the other hand, a grindstone drive motor 24 is laterally fixed to the upper portion of the grindstone support housing 10.
As shown in FIG. 2, the grindstone drive motor 24 has a built-in rotary encoder (rotational phase detection means) 32 for detecting the rotational phase of the motor output shaft 26, and the motor output shaft 26 has a motor sprocket (rotational detection). 28)
Is fixed. The motor sprocket 28 is connected to the ring sprocket 16 via a silent chain 30.
The driving force of the grindstone drive motor 24 is transmitted to the grindstone 20 by the 8, the silent chain 30, and the ring sprocket 16. In particular,
As the motor output shaft 26 rotates in the direction of arrow A1 in FIG. 1, the grindstone 20 rotates in the direction of arrow A2 in FIG.

At the rear of the grindstone support housing 10,
A flange portion 34 is provided, and the flange portion 34 is attached by a bolt 36 to the rotation output shaft 3 of the twist angle adjusting device 38.
It is fixed at 9. The twist angle adjusting device 38 includes a twist angle adjusting motor 4 that drives the rotation output shaft 39 to rotate.
0, and is configured to adjust the inclinations of the grindstone 20 and the grindstone support housing 10 with respect to a workpiece, which will be described later, by this rotational drive.

This twist angle adjusting device 38 is used for the table 4
The table 42 is fixed on the table 2 and is slidable along a predetermined cutting direction (direction including arrow A3 in FIG. 1). The table 42 is provided with a cutting feed motor 44 and a ball screw mechanism (not shown),
By these operations, the twist angle adjusting device 38, the grindstone support housing 10, and the grindstone 20 as a whole are moved to the table 4.
Along with 2, it is slidably driven in the cutting direction.

On the other hand, the work 46 processed by the grindstone 20 is supported by an apparatus as shown in FIG. The work 46 has a screw gear-shaped gear portion 48, and the gear portion 48 has a shape capable of meshing with the grindstone 20 as shown in FIG. It is configured to be held in the axial direction by the push base 52.

The headstock 50 rotatably supports a main shaft 54 in a horizontal state. At the tip of the main shaft 54, a holding portion 56 that is in pressure contact with one end of the work 46 projects, and a gear 58 is fixed to the middle portion. Below the main shaft 54, a clutch cylinder (clutch means) 60 and a main shaft motor (work driving means) 62 are provided in a horizontal state, and a telescopic rod 64 of the clutch cylinder 60 and an output shaft 66 of the main shaft motor 62. Each has 6 gears
7,68 are fixed. Then, with the telescopic rod 64 of the clutch cylinder 60 protruding, as shown by the solid line in FIG.
They are meshed with each other so that the driving force of the spindle motor 62 becomes
4, while the telescopic rod 64 is retracted, the gear 67 moves to the gear 58, as shown by the chain double-dashed line in FIG.
The spindle 54 is separated from the spindle motor 62 in the axial direction, and is separated from the spindle motor 62.

The tailstock 52 is installed on the bed 70, and holds the holding part 69 in pressure contact with the other end of the work 46.
The tailstock shaft 53 having the is supported slidably in the direction of arrow A4 (workpiece axis direction) in FIG. When the tailstock shaft 53 is driven in a direction approaching the headstock 50, the work 46 is held, and the driving force transmitted to the main shaft 54 is frictional force from the holding portion 56. It is supposed to be transmitted to 46.

A bracket 72 is attached to the headstock 50.
A work detector 74 is provided via the. The work detector 74 is provided at a position opposed to the outer peripheral surface of the gear portion 48 of the work 46, and detects the height position of the outer peripheral surface (that is, the uneven state of the gear portion 48). is there.

As a feature of this apparatus, the number of teeth of the motor sprocket 28 shown in FIG. 1 is 1 / N (N is a natural number of 2 or more; N = 6 in this embodiment) of the ring sprocket 16 on the grindstone 20 side. It is set. Further, in one of the water cutting plates (the water cutting plate on the front side in FIG. 1) 22, the center angle α is 360 ° / N (360 ° / 6 in this embodiment, when the center angle is equal to or more than one pitch of the teeth of the grindstone 20). = 60
The protrusion 22a to be detected is formed on the outside in the radial direction only in a predetermined angle region of less than 90 °).
A grindstone detector (protruding portion detection means) 78 is provided at a predetermined angle position via a bracket 76. The grindstone detector 78 is disposed at a position that can face the detected protrusion 22a, and is turned on only when the detected protrusion 22a exists at an angular position that faces the grindstone detector 78. It can be switched. As the grindstone detector 78, a well-known detecting means such as a proximity switch, an optical sensor, or a magnetic sensor can be applied.

Further, this device is provided with a control device 80 as shown in FIG. This control device 80
The spindle motor receives the detection signals from the work detector 74, the rotation phase detector 32, the grindstone detector 78, and the like, and the command signal from the operation panel (memory command means) 90 operated by the operator. 62, a grindstone driving motor 24, a twist angle adjusting motor 40, a cutting feed motor 44, a clutch switching valve 61 that performs expansion / contraction switching of the clutch cylinder 60, and the like to control the operation thereof, and stop control. As a function related to the work stop control means 82,
A stop position storage means 84 and a grindstone drive control means 86 are provided.

The work stop control means 82 is the spindle motor 6
While the workpiece 46 is being rotationally driven by 2, the workpiece detector 74
The detection signal output from the work is monitored, and the rotation of the work 46 is stopped when the surface of the gear portion 48 at a predetermined height position (for example, a tooth crest) is detected by the work detector 74. The drive of the spindle motor 62 is controlled.

The stop position storage means 84 is the operation panel 90.
When the storage command signal is output from the above, the rotation phase of the motor output shaft 26 detected by the rotation phase detector 32 at the time of this output is stored as the grindstone stop phase as it is. , This operation panel 9
When the teaching switch (not shown) provided at 0 is operated, the storage command signal is output.

The grindstone drive control means 86 controls the rotational drive of the grindstone 20 by the grindstone drive motor 24.
It plays a role as a whetstone stop control means and a whetstone speed control means. Specifically, this grindstone drive control means 86
Is to rotate the grindstone 20 at a preset work processing rotation speed N2 during work processing by the grindstone 20, while at the grindstone stop control rotation speed N2 lower than the work processing rotation speed N2 during grindstone stop control. 20 is rotationally driven, and the detection signals output from the rotational phase detector 32 and the grindstone detector 78 are monitored during this grindstone drive, and the detected protrusion 22a is located at the detection position by the grindstone detector 78. It is configured to stop the grindstone 20 when it is detected that it exists and the rotation phase detected by the rotation phase detector 32 matches the grindstone stop phase stored by the stop position storage means 84. ing.

Next, the procedure of using this device and the control operation performed by the control device 80 will be described.

1) Work positioning operation: A work positioning command is input to the controller 80 by operating the operation panel 90. In response to this, the work stop control means 82 operates the spindle motor 62 in a state in which the clutch cylinder 60 is extended (the solid line state in FIG. 5) to rotationally drive the work 46. Then, at the time when the tooth tip surface is detected by the work detector 74, the rotation drive of the work 46 is stopped. As a result, the work 46 is held in the predetermined rotation position.

2) Grindstone stop phase setting work: Grindstone 2 manually
0 is moved forward in the cutting direction (that is, moved in the direction of the arrow in FIG. 1), and at the same time, the grindstone 20 is appropriately rotated by a small amount in the forward and reverse directions, and the detected protrusion 22a is detected by the grindstone detector 78. In the region existing in, the rotational position of the grindstone 20 is adjusted to a position where the grindstone 20 can mesh with the work 46, and the grindstone 20 is further moved until there is no backlash between the grindstone 20 and the gear portion 48 of the work 46. Advance in the cutting direction. Then, the teaching switch of the operation panel 90 is turned on. As a result, a storage command signal is output from the operation panel 90, and the stop position storage means 84 receiving this signal causes the rotation phase of the motor output shaft 26 of the grindstone drive motor 24 currently detected by the rotation phase detector 32. Is stored as the whetstone stop phase.

The teaching work consisting of 1) work positioning work and 2) grindstone stop phase setting work described above is carried out when the worn grindstone 20 is replaced with a new grindstone or in order to change the type of the work 46 to be machined. After the teaching work is completed, the grindstone 20 is returned to the original position (a predetermined position where the teeth of the grindstone 20 and the work 46 are disengaged from each other), and the following machining operation is performed.

3) Machining operation: When a machining command signal is input by operating the operation panel 90, the control device 80 executes the above 1) work positioning work, and then grinds the grindstone 20 to the teeth of the grindstone 20 and the work 46. Feed to the position where
As shown by the chain double-dashed line in FIG. 5, the clutch cylinder 60 is contracted to separate the main shaft 54 from the main shaft motor 62, and the work 46 is freely rotated. In this state, the cutting feed motor 44 and the grindstone drive motor 24 are operated to move the grindstone 20.
By rotating the grindstone 20 at the work processing rotational speed N2 while advancing in the cutting direction, the gear part 48 of the work 46 that is in pressure contact with the grindstone 20 also rotates, and gear honing of the gear part 48 is executed. To be done. After the processing is completed, the control device 80 operates each motor to return the grindstone 20 and the work 46 to the original position, and then stops them.

4) Grinding wheel positioning operation: Next, operation panel 90
When a grindstone positioning command is input by operating, the grindstone drive control means 86 which receives this command operates the grindstone drive motor 24 to lower the rotational speed N for the grindstone stop control as shown in FIG.
The grindstone 20 is rotated by 1, and the rotation phase detector 32 at this time is rotated.
Also, the detection signal of the grindstone detector 78 is monitored. And
With the detection signal of the grindstone detector 78 switched on,
That is, the rotational phase of the motor output shaft 26 detected by the rotational phase detector 32 is changed from the state where the formation region (specific angle region) of the detected protrusion 22a is present at the detection position of the grindstone detector 78. The drive of the grindstone drive motor 24 is stopped so that the grindstone 20 stops when the grindstone stop phase stored in the stop position storage means 84 matches. Here, the processed work 46 is removed manually or by an auto loader (not shown), and the work 46 to be processed next is attached.

By the above operation, the grindstone 20 is positioned at a position where it can mesh with the gear portion 48 of the work 46 which is positioned at the above-mentioned predetermined rotational position at the beginning of the processing operation of the work 46 to be processed next. Becomes

The reason will be described in more detail. In this embodiment, the number of teeth of the motor sprocket 28 is set to 1/6 of the number of teeth of the wheel side ring sprocket 16, so that the output shaft 26 of the wheel drive motor 24 and When the motor sprocket 28 is unconditionally stopped at the grindstone stop phase, there are six rotational phases of the grindstone 20 at this stop. Here, in this apparatus, the grindstone 20 is stopped only when the detected protrusion 22a formed in the specific angle region in which the central angle α is less than 360 ° / 6 = 60 ° is detected by the grindstone detector 78. Therefore, the rotational phase of the grindstone 20 at the time of this stop is always limited to one. Therefore, the grindstone 20 is reliably positioned at a position where it can mesh with the workpiece 46, regardless of the number of teeth.

Moreover, in this apparatus, since the number of teeth of the grindstone 20 is not involved in the stop control of the grindstone 20, each sprocket 16, 28 can be freely designed without being restricted by the number of grindstone teeth. Is facilitated. Further, the entire apparatus can be made more compact as compared with one in which the rotational phase of the ring sprocket 16 and the grindstone 20 is directly detected by a rotary encoder or the like.

Further, in this embodiment, since the stop position storage means 84 for storing the detected rotation phase when the storage command signal is input from the operation panel 90 as the grindstone stop phase is provided, the work is actually manually operated. It is possible to set the rotation phase of the grindstone 20 in a state in which the engagement between the 46 and the grindstone 20 is confirmed as the grindstone stop phase.

The present invention is not limited to such an embodiment, and the following modes can be adopted as an example.

(1) In the above embodiment, the grindstone drive motor 24
Motor sprocket 2 fixed to the motor output shaft 26 of
Although 8 is set as the rotation detection transmission wheel, the present invention is not limited to this. For example, as shown in FIG. 8, an idle shaft 27 and an idle gear 29 fixed to the idle shaft 27 are introduced separately from the motor output shaft 26, and the idle gear 29 is engaged with the silent chain 30 so that the motor sprocket 28 is engaged. The idle gear 29 may be set as a rotation detection transmission wheel while being linked with the ring sprocket 16. Also in this case, the number of teeth of the idle gear 29 is set to 1 of the number of teeth of the ring sprocket 16.
/ N (N is a natural number of 2 or more), and this idle gear 2
By detecting the rotational phases of the shaft 9 and the idle shaft 27, it is possible to execute an accurate grindstone stop regardless of the number of grindstone teeth, as in the above embodiment.

However, as in the above embodiment, the motor sprocket 28 is used as the rotation detecting transmission wheel, and the grindstone drive motor 24
If a rotary phase detector 32 for detecting the rotary phase of the output shaft 26 is used as the above, there is an advantage that the grindstone 20 can be stopped and controlled with a more simplified structure.

(2) In the above-described embodiment, after the machining operation is finished, the grindstone 20 is temporarily stopped and the positioning operation of the grindstone stop position is performed independently of the machining operation, but the present invention is not limited to this. Without being limited to the above, after the processing by the grindstone 20, the grindstone 20 is automatically processed as it is without the temporary stop.
It may be stopped at a position where it can mesh with. In this case, as shown in FIG. 9, during the machining operation, the grindstone 20 is rotated at the work processing rotation speed N2, and after the processing is completed, the grindstone rotation speed is automatically set so that the grindstone rotation speed is lower than the work processing rotation speed N2. By switching to the rotation speed N1 for use and automatically stopping the grindstone 20 during rotation at this rotation speed N1,
There is an advantage that the stop position control of the grindstone 20 can be performed more accurately than in the case where the grindstone stop operation is performed during the rotation at the work processing rotation speed N2.

(3) In the present invention, the angular area detecting means for detecting whether or not the specific angular area of the grindstone 20 is at the predetermined angular position is not limited to the specific structure, and, for example, other than the specific angular area. Even if the member to be detected is provided in the region and the grindstone 20 is stopped in the grindstone stop phase in the region where the member to be detected is not detected, the same effect as described above can be obtained. However, if the detected projection 22a is projected from the water cutout plate 22 for preventing coolant intrusion as in the above embodiment, the specific angle region is detected with a simpler structure using the existing water cutoff plate 22. It will be possible.

(4) The toothed transmission wheel according to the present invention is not limited to the sprockets 16 and 28 connected through the silent chain 30 as described above, but may be gears that directly mesh with each other. Also in this case, by setting the number of teeth of the rotation detection gear to be 1 / N of that of the grindstone-side gear, the same effect as that of the above embodiment can be obtained.

[0052]

As described above, according to the present invention, the number of teeth of the predetermined rotation detection transmission wheel is set to 1 / N times the number of teeth of the toothed transmission wheel fixed to the grindstone side, and the tooth of this grindstone is used in the above grindstone. Of the above-mentioned grindstone at a time when a specific angle region having a pitch of 1 pitch or more and a central angle of less than 360 ° / N exists at a predetermined angular position, and the rotation phase of the rotation detection transmission wheel reaches a preset grindstone stop phase. Since the rotation is stopped, the grindstone can be surely stopped at a constant rotation phase.
Therefore, by setting the rotation phase at the time of this stop to a rotation phase that allows meshing with the work, the grindstone can be automatically stopped at a position where this grindstone can rotate and mesh with the work. There is an effect that work efficiency can be significantly improved. Moreover, unlike the conventional device, since the number of teeth of the grindstone is not related to the stop control of the grindstone, the number of teeth of each toothed transmission can be set in a wide range without being restricted by the number of teeth of the grindstone. Design can be facilitated. Conversely, once the device is designed,
A grindstone with any number of teeth can be attached, making it possible to process many types of workpieces. Further, since the rotation phase of the rotation detection transmission wheel having the number of teeth of 1 / N of the number of teeth of the toothed transmission wheel fixed to the grindstone side is detected, the rotation phase of the large-diameter ring-shaped grindstone is detected. The grinding wheel stop control can be executed with a more compact structure than in the case of direct detection.

Here, in the apparatus according to the second aspect, the rotation detecting transmission wheel is a toothed transmission wheel fixed to the output shaft of the grindstone drive motor, and the rotation phase of the output shaft of the output shaft of the grindstone drive motor. Since the one that has the built-in rotational phase detecting means for detecting is used, there is an effect that the wheel stop control can be performed with a more compact structure.

Further, the apparatus according to claim 3 is provided with the stop position storage means for storing the detected rotational phase when the storage command means outputs the storage command by an external operation as the grindstone stop phase. There is an effect that the operator can set the rotation phase of the grindstone as the grindstone stop phase in a state in which the mesh between the work and the grindstone is actually confirmed by a simple work.

In the apparatus according to the fourth aspect, the detected protrusion is projected only in the specific angle region from the water cutting plate for preventing the coolant from entering the grindstone bearing, and the detected protrusion exists at the predetermined angular position. It is configured to detect whether or not the specific angle area is at the predetermined angular position depending on whether or not to perform the detection of the specific angle area with a simple structure using an existing water drain plate. There is an effect that can be.

According to a fifth aspect of the present invention, there is provided grindstone speed control means for switching the rotational driving speed of the grindstone to a grindstone stop control speed lower than the work machining speed when the grindstone stop control means controls the grindstone stop. Therefore, there is an effect that the stop position of the grindstone can be controlled more accurately than the stop control of the grindstone at the above-mentioned workpiece processing speed.

In the apparatus according to the sixth aspect, the driving force of the work driving means is transmitted to the work through the clutch means, and while the work is rotationally driven in this manner, the rotation phase of the work is a predetermined work stop phase. By stopping the rotation of the work at the time, the work can be automatically positioned at a predetermined angular position, while the clutch means separates the work from the work drive means to bring the work into a free rotation state. Only by doing so, there is an effect that this work can be switched to a state in which it can be processed by the grindstone.

[Brief description of drawings]

FIG. 1 is a front view of a grindstone supporting means according to an embodiment of the present invention.

FIG. 2 is a side view of the grindstone supporting means.

FIG. 3 is a cross-sectional view showing a meshing state between the grindstone and a gear portion of a work.

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is a side view of the work supporting means in the above embodiment.

FIG. 6 is a block diagram showing a functional configuration of a control device used in the above embodiment.

FIG. 7 is a graph showing the content of the rotational speed control of the grindstone drive motor in the above embodiment.

FIG. 8 is an explanatory diagram showing a drive transmission system in another embodiment.

FIG. 9 is a graph showing the content of rotation speed control of a grindstone drive motor in another embodiment.

[Explanation of symbols]

14 Bearing for Grinding Wheel 16 Ring Sprocket (Toothed Transmission Wheel Fixed to the Grinding Wheel Side) 20 Grinding Stone 22 Water Cutting Board 22a Detected Projection 24 Grinding Wheel Drive Motor 26 Motor Output Shaft 28 Motor Sprocket (Rotation Detection Transmission Wheel) 30 Silent Chain 32 Rotational phase detector (rotational phase detection means) 46 Work piece 48 Gear section 54 Main spindle 60 Clutch cylinder (clutch means) 62 Main axis motor (workpiece driving means) 74 Workpiece detector 78 Grindstone detector (protruding part detection means) 80 Control device 82 Work stop control means 84 Stop position storage means 86 Grinding wheel drive control means (grinding wheel stop control means and grinding wheel speed control means) α Central angle of specific angle region

Claims (6)

[Claims] 1. A grindstone in the form of an internal gear for machining a tooth surface of a work by rotating while meshing with a gear-like work, a grindstone driving means for rotationally driving the grindstone, and at least the grindstone side and the grindstone driving means. In a gear honing apparatus equipped with a plurality of toothed transmission wheels that are fixed to the side and are interconnected to transmit the driving force of the whetstone driving means to the whetstone, the toothed wheels fixed to the whetstone side The predetermined toothed transmission wheel except the transmission wheel is a rotation detection transmission wheel whose number of teeth is 1 / N times (N is a natural number of 2 or more) the number of teeth of the toothed transmission wheel fixed to the grindstone side. Rotation phase detecting means for detecting the rotation phase of the rotation detecting transmission wheel, and in the above grindstone, the tooth of the grindstone has a pitch of 1 pitch or more and a central angle of 360.
Angle region detecting means for detecting whether or not the specific angle region of less than ° / N is at the predetermined angular position, and the rotation phase of the rotation detection transmission wheel when it is detected that the specific angle region is at the predetermined angular position. And a grinding stone stop control means for stopping the rotation of the grinding stone when a preset grinding stone stop phase is reached. 2. A grindstone stop control device for a gear honing machine according to claim 1, wherein a grindstone drive motor having a rotation phase detecting means for detecting a rotation phase of a motor output shaft is provided as the grindstone driving means. A grinding wheel stop control device for a gear honing machine, wherein the toothed transmission wheel fixed to the output shaft of a drive motor is the rotation detection transmission wheel. 3. A grindstone stop control device for a gear honing apparatus according to claim 1 or 2, wherein a storage command means for outputting a storage command signal in response to an operation from the outside, and a storage command signal generated by the storage command means. A grinding wheel stop control device for a gear honing machine, comprising: a stop position storage means for storing the rotation phase detected by the rotation phase detection means as the grinding stone stop phase at the time of output. . 4. A grindstone stop control device for a gear honing apparatus according to claim 1, wherein the grindstone bearing rotatably supports the grindstone from the outside in the radial direction, and the grindstone bearing is fixed to the grindstone side. And a water cutting plate arranged at a position to prevent the coolant supplied during gear honing from entering the grindstone bearing, and as the angle region detecting means, corresponds to the specific angle region in the water cutting plate. A protruding portion detecting means for detecting whether or not the detected portion is present at the predetermined angular position, while forming the detected protruding portion by projecting the portion to be radially outward from the other portion. A grinding wheel stop control device for a gear honing processing device. 5. A grinding wheel stop control device for a gear honing processing apparatus according to claim 1, wherein a speed at which the grinding wheel drive means rotationally drives the grinding wheel is set at a preset speed for working a workpiece. And a grinding wheel speed control means for switching to a grinding wheel stop control speed lower than the work processing speed when the grinding wheel stop control means controls the grinding wheel stop control means. 6. A grindstone stop control device for a gear honing apparatus according to claim 1, wherein a work drive means for rotationally driving the work and a driving force of the work drive means are transmitted to the work. And a clutch means capable of switching the work driving means and the work to separate the work and freely rotate the work, and when the work is driven to rotate by the work driving means, the rotation phase of the work is the same as that of the grindstone. And a work stop control means for stopping the rotation of the work at a time when a preset work stop phase for meshing with is reached, and a grindstone stop control device for a gear honing machine.