JP2691104B2 - Method and apparatus for automatic meshing of gear grinding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic meshing method and device for a gear grinding machine which automatically meshes a gear to be ground with a grinding tool to grind the tooth flanks of the gear, and more specifically, An automatic meshing method and apparatus for a gear grinding machine, which allows the gear to be ground and a grinding tool to mesh with each other in the most possible state when the gear to be ground is formed eccentrically Regarding

[0002]

2. Description of the Related Art Conventionally, in a gear grinding machine, a gear to be ground is meshed with a grindstone having a spiral stripe, and the tooth surface of the gear to be ground is precisely ground by the grindstone. When the grinding gear is formed eccentrically, the tooth surface of the gear to be ground is unevenly ground.

Therefore, the technical idea of re-clamping an eccentric to-be-ground gear at an optimum position and appropriately engaging the to-be-ground gear with a grindstone is disclosed in the invention "engagement device" of Japanese Patent Publication No. 62-34489. It is disclosed.

In the above-mentioned "meshing device", the grindstone rotating under the action of the grindstone rotating motor is made to mesh with the gear to be ground separated from the rotation of the gear rotating motor to be ground, and the meshing state is shown. The load power of the grindstone rotation motor,
The eccentric position of the gear to be ground is detected as an electric quantity based on the signal relating to the number of teeth of the gear to be ground detected by the work sensor. Then, the number of teeth of the gear to be ground is counted from the time when the peak of the load power is detected, and the gear to be ground and the gear rotation motor for ground are rotated by a signal relating to the preset Nth number of teeth. By outputting a signal for energizing the electromagnetic clutch for connecting the electromagnetic clutch and the electromagnetic clutch, after the mechanical operation delay time, when the electromagnetic clutch is in the optimum eccentric state, the both are engaged again to be ground. The connection between the gear and the gear rotation motor for grinding is completed.

[0005]

However, in the above-mentioned prior art apparatus, when the specifications of the gear to be ground that meshes with the grindstone are different, such as the number of teeth and the module, these data and the electromagnetic clutch are used. There is a problem that it is necessary to re-enter all the settings such as the timing at which is activated.

The present invention has been made in order to solve such a conventional problem. Even when gears to be ground having different specifications are mounted, the specifications of the gear to be ground,
And an automatic meshing method for a gear grinding machine capable of re-clamping a gear to be ground at an optimum eccentric position where the eccentricity of the gear to be ground is minimized without re-inputting the timing at which the electromagnetic clutch is energized, and The purpose is to provide a device.

[0007]

In order to achieve the above object, a first aspect of the present invention rotates a gear to be ground and a grinding tool mutually to grind a tooth surface of the gear to be ground. An automatic meshing method for a gear grinding machine, wherein the grinding tool rotating under the driving action of a grinding tool rotating means and the gear to be ground separated from the work rotating means by deactivating the clutch mechanism are meshed. A first step of interlocking the gear to be ground with the rotation of the grinding tool, a second step of calculating a rotation cycle of the gear to be ground interlocking with the rotation of the grinding tool, and the gear to be ground And a preset operation delay time of the clutch mechanism, an internal delay time for ending the operation of the clutch mechanism when one rotation cycle of the gear to be ground ends is calculated. The steps of The fourth step of detecting the peak of the load power of the grinding tool rotating means for rotating the cutting tool, and the counting of the internal delay time based on the detected peak time of the load power, and the internal delay time Fifth, which outputs a signal for urging the clutch mechanism when the time has elapsed
The steps are as follows.

A second aspect of the present invention is an automatic meshing device for a gear grinding machine, wherein a gear to be ground and a grinding tool are mutually rotated to grind a tooth surface of the gear to be ground. First rotating means for rotating the grinding gear, second rotating means for rotating the grinding tool, and a clutch mechanism for connecting or disconnecting the gear to be ground and the first rotating means, Rotation cycle calculation means for calculating the rotation cycle of the gear to be ground which is separated from the first rotation means by the deactivation of the clutch mechanism and is interlocked with the grinding tool rotating under the action of the second rotation means. From the operation delay time storage means for storing a preset operation delay time of the clutch mechanism, the rotation cycle of the gear to be ground, and the operation delay time of the clutch mechanism, 1 of the gear to be ground is obtained.
An internal delay time calculation circuit for calculating an internal delay time for ending the operation of the clutch mechanism when the rotation cycle ends, and a load power detection means for detecting the load power of the second rotating means for rotating the grinding tool. A signal for activating the clutch mechanism when the load power detecting means starts counting the internal delay time when the peak of the load power of the second rotating means is detected, and when the internal delay time has elapsed. And a clutch mechanism control means for outputting.

[0009]

In the automatic meshing method and apparatus of the gear grinding machine according to the present invention, the gear to be ground whose clutch mechanism is deenergized and separated from the work rotating means, and the grinding tool which rotates under the action of the grinding tool rotating means. Are engaged with each other, the gear to be ground is interlocked with the rotation of the grinding tool, and the rotation cycle of the gear to be ground is calculated by the rotation cycle calculating means.

[0010] and the internal delay time calculating means rotation period of the grinding wheel which is calculated by said rotation period calculation means, and a operation delay time of the stored clutch mechanism to clamp the delay time storage unit, wherein the grinding wheel At the end of one rotation cycle, the internal delay time for ending the operation of the clutch mechanism is calculated.

Next, when the peak of the load power of the grinding tool rotating means is detected by the load power detecting means,
The clutch mechanism control means starts counting the internal delay time,
A signal for activating the clutch mechanism is derived when the internal delay time has elapsed.

Therefore, when the load power of the grinding tool rotating means is at its peak, the operation of the clutch mechanism for connecting the gear to be ground and the work rotating means can be terminated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the automatic meshing method for a gear grinding machine according to the present invention will be described in detail below with reference to the accompanying drawings in connection with a device for carrying out the automatic meshing method.

FIG. 1 is a view showing an external structure of a gear grinding machine 10 embodying the present invention. The gear grinding machine 10 is provided with a cutting table 14 on the upper surface of the bed 12, and the cutting table 14 moves forward and backward in the direction of arrow A under the rotating action of the cutting motor 16. The traverse table 18 arranged on the upper surface of the cutting table 14 moves forward and backward in the direction perpendicular to the direction of arrow A, that is, the direction of arrow B, under the rotating action of the traverse motor 20.

Further, on the traverse table 18, there is provided a work sensor 24 which is a proximity switch for detecting the number of teeth of the work-to-be-ground gear 22 and the rotating work-to-be-ground gear 22 and generating a predetermined pulse. It is arranged. The workpiece gear 22 rotates under the action of the work spindle motor 26.

On the other hand, a column 28 is arranged on the bed 12 in the traveling direction of the cutting table 14, and a swivel table 30 is held by the column 28. The turning table 30 is turned in the direction of arrow C by a motor (not shown) provided in the column 28. Further, the turning table 30 is provided with a shift table 32. The shift table 32 is operated by a shift motor 34. To the arrow D direction.

The shift motor 34 includes a first pulse generator 3
5, the first pulse generator 35 is attached to the shift motor 3
The rotation speed of 4 is detected.

As shown in FIG. 2, the grindstone spindle unit 36 includes a grindstone spindle motor 38 and a tool shaft 3 which is a master rotated by the grindstone spindle motor 38.
The second grinding wheel 42, which is basically composed of the second pulse generator 46 that engages with the wheel 9, rotates under the action of the grinding wheel spindle motor 38 and has a cylindrical shape. .

Since the grindstone spindle unit 36 is attached to the shift table 32, the shift motor 3
It is displaced in the direction of arrow D together with the shift table 32 under the rotating action of No. 4.

On the other hand, as shown in FIG.
Is detachably supported on one end of the rotary shaft 48 via a pair of clamp jigs 50, and a gear 54 having a relatively large diameter is supported on the other end of the rotary shaft 48 via an electromagnetic clutch 52. Supported. The gear 54 meshes with a gear 56 having a smaller diameter, and the gear 56 is supported by a shaft 58. A gear 57 is rotatably supported on the shaft 58, and the gear 57 has a smaller diameter than that of the gear 5.
9, and the gear 59 is pivotally supported by the shaft 61. One end of the shaft 61 is connected to the work spindle motor 26 via a coupling 60, and a third pulse generator 62 is attached to the work spindle motor 26. The other end of the shaft 61 is connected to the inertia damper 63.

In the gear grinding machine 10 configured as described above, the synchronous control for synchronizing the rotation of the grinding wheel 22 with the rotation of the grindstone 42 has already been filed by the present applicant in Japanese Patent Application Laid-Open No. 1-213702. The synchronous control method disclosed in "NC Synchronous Control System" is used.

That is, as shown in FIG. 4, the output signal PG ₁ of the second pulse generator 46 is introduced into the feedforward computing unit 68 via the quadruple counter 66 of the feedforward control unit 64. The calculation result of the feedforward calculator 68 is introduced into the first input terminal of the adder 72 as the feedforward command signal S _ff via the D / A converter 70.

On the other hand, the speed data S _M of the tool shaft 39, which is the calculation data of the feedforward calculator 68, is introduced to the semi-closed loop calculator 76 in the semi-closed loop control unit 74. In this case, the output signal PG ₂ is introduced from the third pulse generator 62, which is a rotary encoder axially attached to the work spindle motor 26, to the other input terminal of the semi-closed loop computing unit 76 via the counter 78 for quadrupling. ing. Based on this output signal PG ₂ , the semi-closed loop calculator 76 introduces the semi-closed loop command signal S _f2 to the second input terminal of the adder 72 via the D / A converter 80. The speed data S _S of the slave shaft 61, which is the output signal of the adder 72, controls the rotation speed of the work spindle motor 26 via the servo amplifier 82.

A sampling clock T _S obtained by dividing the oscillation frequency of a crystal oscillator (not shown) is introduced into the clock input terminals CK of the feedforward control unit 64 and the semi-closed loop control unit 74.

Next, the automatic meshing device 84 for meshing the grindstone 42 and the gear 22 to be ground in phase with each other will be described with reference to FIG.

The automatic meshing device 84 outputs the signal indicating the number of teeth of the gear 22 to be ground output from the work sensor 24 and the A phase output from the second pulse generator 46 that detects the rotation amount of the grindstone spindle motor 38. Pulse and 0 point signal (Z
Phase pulse) and the phase detection circuit 86 for detecting the phase data of the grindstone 42, and the phase data output from the phase detection circuit 86 is corrected by the data indicating the module of the gear 22 to be ground read from the storage circuit (not shown). Phase data correction circuit 88, and the phase data correction circuit 8
An automatic meshing circuit 90 that outputs a meshing signal from the corrected phase data output from 8 and an automatic meshing command output from a control circuit (not shown).

Further, the automatic meshing device 84 adds the meshing signal output from the automatic meshing circuit 90 and the A-phase pulse output from the second pulse generator 46, and the adding circuit 92. A synchronization control circuit 94 for generating a synchronization signal according to the output data is provided, and the servo amplifier 82 drives the work spindle motor 26 by the output of the synchronization control circuit 94. The phase detection circuit 86 is connected to the count memory circuit 96.

The automatic meshing device 84 configured as described above
The operation of the initial phase teaching for matching the phases of the grinding target gear 22 and the grindstone 42 will be described with reference to the flowchart of FIG.

The phase data obtained by this initial phase teaching is utilized when continuously grinding a plurality of identical gears 22 to be ground.

Since the work spindle motor 26 is stopped in the initial state and the electromagnetic clutch 52 is deenergized (step S1), the rotary shaft 48 of the gear 22 to be ground can be easily rotated by hand. (See FIG. 3).
Next, the cutting motor 16 is energized to advance the cutting table 14 (step S2).

At this time, since the grindstone spindle motor 38 is deenergized, the grindstone 42 has stopped rotating. Then, the operator has to stop the rotation of the gear 2 to be ground.
2 and the grindstone 42 are meshed with each other to perform phase matching.

Next, the grindstone 42 is rotated by rotating the grindstone spindle motor 38 at a low speed (step S3).

In such a state, the A-phase pulse output from the second pulse generator 46 for detecting the rotation of the grindstone spindle motor 38 and the Z-phase pulse (0-point signal) are input to the phase detection circuit 86. Phase detection circuit 86
Starts from the 0-point signal and counts the number N of A-phase pulses until a pulse is output from the work sensor 24 (step S4) (see FIG. 7) and stores the number N of pulses in the count memory circuit 96. To do.

When the counting of the pulse number N of the A phase is completed, the rotation of the grindstone spindle motor 38 is stopped (step S5), and the cutting motor 16 is energized so as to rotate in the direction opposite to the step S2. The cutting table 14 is retracted, and the initial phase adjustment is completed (step S6).

Next, in accordance with the teaching of the initial phase, the number of pulses of the A phase stored in the count memory circuit 96 is used to automatically match the phases of the grindstone 42 and the gear 22 to be ground with each other. The action of meshing will be described with reference to the flowchart of FIG.

When the grindstone spindle motor 38 is energized with the gear 22 to be ground attached, the work spindle motor 26 electrically connected to the grindstone spindle motor 38 is also driven, and both start synchronous operation. Therefore, when the electromagnetic clutch 52 is energized (step S10), the grinding target gear 22 rotates under the rotating action of the work spindle motor 26 (step S11).

In this state, if the cutting motor 16 is urged, the cutting table 14 is gradually moved forward (step S12), but before the gear 22 to be ground and the grindstone 42 mesh with each other, The cutting motor 16 is deenergized. In the normal state, the gear to be ground 22 is out of phase with the grindstone 42, and it is necessary to correct it.

Therefore, the phase detection circuit 86 counts the pulse number N ₁ of the A phase from the 0-point signal of the second pulse generator 46 until the work sensor 24 outputs. Further, the phase detection circuit 86 compares the number of pulses N stored in the count memory circuit 96 in step S4 with the number of pulses N ₁ counted this time (step S13),
When the number of pulses N is substantially equal to the number of pulses N _1, it is determined that there is no phase shift, a cutting command signal is sent to the cutting motor 16, and the cutting table 14 is moved forward (step S1).
4).

On the other hand, the signal relating to the equal value of the number of pulses N and the number of pulses N ₁ is introduced into the adder circuit 92 through the phase data correction circuit 88 and the automatic meshing circuit 90, and output from the synchronization control circuit 94. Based on the synchronizing signal, the servo amplifier 82 synchronously operates the work spindle motor 26 and shifts to a normal grinding process.

When the stored pulse number N and pulse number N ₁ are not equal, it means that there is a phase shift between the grindstone 42 and the gear 22 to be ground. Therefore, the signal is introduced into the automatic meshing circuit 90 via the phase data correction circuit 88, and the automatic meshing circuit 9 is supplied by the signal.
A correction signal from 0 is introduced into the adder circuit 92 to increase or decrease the rotation speed of the work spindle motor 26 in accordance with the pulse count N ₁ (step S15). By repeating this, finally, a pulse number N _{1 that} is substantially equal to the pulse number N is obtained, the phase shift is eliminated, and thereafter the gear 22 to be ground keeps the same phase with respect to the grindstone 42. (See FIG. 9). In this case, in the phase detection circuit 86, since N≈N ₁ , the cutting command signal is sent and the cutting motor 16 is energized, as in the above case.

In this way, the grinding gear 22 that is automatically meshed with the grindstone 42 is ground. During this grinding, the grinding gear 22 is re-clamped by the electromagnetic clutch 52 to be ground. The operation of removing the eccentricity 22 will be described.

FIG. 10 is a block diagram of a clamp control circuit 98 which controls the electromagnetic clutch 52 to clamp the gear 22 to be ground.

The clamp control circuit 98 detects the load power of the grindstone spindle motor 38 by the load power detection circuit 100.
A sample-hold circuit 102 that samples and holds the output of the load power detection circuit 100; an output of the sample hold circuit 102 and the load power detection circuit 10;
A comparison circuit 104 for comparing the output with 0 and a comparison circuit 10
4 has a peak detection circuit 106 for detecting the peak of the voltage output from the circuit 4.

Further, the clamp control circuit 98 reads out the number of teeth of the gear to be ground 22 and the rotational speed of the grindstone spindle motor 38, which are stored in advance in a storage circuit (not shown), and the time for the gear to be ground 22 to make one revolution is read. A rotation cycle calculation circuit 108, a clamp delay time storage circuit 110 that stores a mechanical operation delay time from the input of the bias signal to the end of the operation of the electromagnetic clutch 52, and the clamp delay time storage An adder circuit 112 that adds the outputs of the circuit 110 and the rotation cycle calculation circuit 108; a timer circuit 114 that outputs an urging signal to the electromagnetic clutch 52 by the output of the adder circuit 112 and the output of the peak detection circuit 106; And a clutch drive circuit 116 for driving the electromagnetic clutch 52 according to a signal output from the timer circuit 114. That.

The operation of re-clamping the eccentric gear 22 to be ground by the electromagnetic clutch 52 by the clamp control circuit 98 configured as described above will be described with reference to the flowchart of FIG.

The work spindle motor 26 and the grindstone spindle motor 38 are energized, and the gear 22 to be ground and the grindstone 42 rotate (step S21). Cutting oil is supplied to the rotating grindstone 42 (step S22), and the load power P ₁ of the grindstone spindle motor 38 to which this cutting oil is supplied is detected by the load power detection circuit 100,
The sample and hold circuit 102 performs sample and hold (see P _{1 in} FIG. 12) (step S23).

Then, the cutting motor 16 is energized to move the cutting table 14 forward (step S24), and when the cutting table 14 reaches the preset position, the electromagnetic clutch 52 is deenergized ( Step S25), the rotary shaft 48 of the gear 22 to be ground is in a state in which it can be easily rotated by hand, that is, in a free state.

When the cutting table 14 is further advanced (step S26) and the grindstone 42 and the grinding wheel 22 come into contact with each other, the free grinding wheel 22 is interlocked with the rotation of the grinding wheel 42. In this way, the load power P ₁ is detected while advancing the cutting table 14.

Next, the load power P ₂ of the grindstone spindle motor 38 for interlocking the gear 22 to be ground is detected by the load power detection circuit 100 (see P _{2 in} FIG. 12) and output to the comparison circuit 104. . The comparison circuit 104 compares the load power P ₂ with the load power P ₁ detected in step S13 and held in the sample hold circuit 102, and the difference load power P ₃ (P ₃ = P ₂ −
P ₁ ) is output to the peak detection circuit 106 (FIG. 12, P
See ₃ ).

Here, P ₃ = P by the comparison circuit 104
The calculation of _2- P ₁ is to remove the load power due to the supplied cutting oil and detect the peak only with the load power due to the grinding.

At this time, the rotation cycle calculation circuit 108 uses the storage circuit (not shown) to calculate the number N ₂ of teeth of the gear 22 to be ground.
And the rotational speed R of the grindstone spindle motor 38 per minute
Is read and the rotation cycle T ₁ of the gear 22 to be ground is calculated based on the following equation.

T ₁ = R / (60 × N ₂ ) [sec] (1) Next, the peak detection circuit 106 starts detecting the peak power of the load power P ₃ (step S 27), and the peak power is detected. Tara (see FIG. 12) (step S28),
The adder circuit 112 reads the rotation cycle T ₁ of the gear to be ground 22 from the rotation cycle calculation circuit 108, and further, the clamp delay time T ₂ from the clamp delay time storage circuit 110.
Is read (step S29), and the internal delay time T is calculated by the following equation.

T = T ₁ −T ₂ = R / (60 × N ₂ ) −T ₂ [sec] (2) The clamp delay time T ₂ is the electromagnetic clutch to which the energizing signal is input from the timer circuit 114. 52 is the gear to be ground 2
2 is the delay time of the mechanical operation from the start of the connecting operation between the work spindle motor 26 and the work spindle motor 26 until the connecting operation is completely completed. This clamp delay time T ₂ is obtained in advance by experiments or the like, and the clamp delay Time memory circuit 11
It is stored in 0.

On the other hand, the timer circuit 114 starts counting the internal delay time T output from the adder circuit 112 in response to the peak power detection signal output from the peak detection circuit 106, and the internal delay time T When the counting of (1) is finished (see FIG. 12) (step S30), a signal for activating the electromagnetic clutch 52 is sent to the clutch drive circuit 11
6 (step S31). The electromagnetic clutch 52 has the gear 22 to be ground after the clamp delay time T ₂ has elapsed.
And the work spindle motor 26 are terminated, whereby the gear 22 to be ground rotates under the rotating action of the work spindle motor 26. Then, cut table 1
4 is moved forward, the gear 22 to be ground moves to the grindstone 4
It is ground to 2.

In this way, when the electromagnetic clutch 52 completes the connection between the gear 22 to be ground and the work spindle motor 26, that is, when the re-clamping is performed, the peak of the detected load power P ₃ is reached. (Fig. 12,
It becomes a peak after the gear 22 to be ground makes one rotation (see FIG. 12).

FIG. 13 shows the meshing state of the grindstone 42 and the gear 22 to be ground and the eccentric state of the gear 22 to be ground in this case.
Shown in

FIG. 13 (A) shows an eccentric gear 22 to be ground.
Shows the case where the center WC is farthest from the grindstone 42. At this time, the tooth surface of the grinding target gear 22 and the tooth surface of the grindstone 42 are in phase with each other, but the meshing state is shallow. FIG.
In (B), the center WC of the gear to be ground 22 is the gear to be ground 2
2 is a direction orthogonal to the rotation direction of 2 and is displaced vertically upward from the center of rotation. At this time, only the R surface of the grinding target gear 22 meshes with the grindstone 42, so that the grinding target gear 22 Only the R surface is ground. FIG. 13C shows a case in which the center WC of the gear to be ground 22 is a direction orthogonal to the rotation direction of the gear to be ground 22 and is displaced vertically downward from the center of rotation. Only the L surface of 22 meshes with the grindstone 42, and only the L surface of the gear 22 to be ground is ground.

Further, FIG. 13D shows the gear 2 to be ground.
A case where the center WC of 2 is closest to the grindstone 42 is shown. At this time, the tooth surface of the gear 22 to be ground and the tooth surface of the grindstone 42 are in phase with each other, and the meshing state is the deepest.

Therefore, by re-clamping the center GC in the state of FIG. 13 (D), the state shown in FIG. 13 (B) or FIG.
The state in which only the R surface or the L surface as shown in (C) is ground is suppressed, and the gear 22 to be ground is shown in FIGS.
It rotates in the state of 3 (D).

Therefore, by advancing the cutting table 14, the gear 22 to be ground can uniformly grind the R surface and the L surface without grinding only the R surface or the L surface. By grinding the tooth surface of the gear to be ground 22 that deeply meshes with the grindstone 42 and reducing the tooth surface of the gear to be ground 22 that meshes shallowly, the gear to be ground 22 having no eccentricity in the finished state is obtained. Obtainable.

As described above, according to the present embodiment,
The timer circuit 114 starts counting the internal delay time T output from the adder circuit 112 when a signal indicating the peak of the load power P ₃ of the grindstone spindle motor 38 is input from the peak detection circuit 106, and the internal delay time T is counted. When is passed, a signal for urging the electromagnetic clutch 52 is output.
The electromagnetic clutch 52 completes the connection between the gear 22 to be ground and the work spindle motor 26, that is, the re-clamping, after a clamp delay time T ₂ previously obtained by experiments or the like.

At this time, the load power P ₃ of the grindstone spindle motor 38 reaches its peak, and the grindstone 42 and the gear 2 to be ground 2
The phase is the same as that of 2 and the deepest meshing occurs.

Accordingly, the tooth surface of the gear to be ground 22 can be uniformly grounded, the black skin residue on the tooth surface can be suppressed, and the influence of the eccentricity of the gear to be ground 22 is minimized, thus achieving high accuracy. Can be ground.

[0064]

According to the automatic meshing method and apparatus for a gear grinding machine of the present invention, even when gears to be ground having different specifications are mounted, the specifications of the gear to be ground and the electromagnetic clutch are energized. Since the operation of the clutch mechanism that connects the gear to be ground and the workpiece rotating means can be terminated when the load power of the grinding tool rotating means is peaked without re-inputting the timing to be performed, Can be engaged at an optimum position.

Therefore, even with an eccentric work, the tooth surface is clamped so as to be ground evenly, so that the grinding allowance can be reduced as much as possible, and the grinding accuracy can be improved and the grinding time can be improved. Can be shortened and the power consumption of the gear grinding machine can be further suppressed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an external configuration of a gear grinding machine embodying the present invention.

FIG. 2 is an explanatory diagram showing a correlation between a grindstone and a gear to be ground in the embodiment shown in FIG.

FIG. 3 is an explanatory diagram showing the correlation between the gear to be ground, the pulse generator, and the work spindle motor that drives them in the embodiment shown in FIG.

FIG. 4 is a block diagram of a synchronization control circuit of the embodiment shown in FIG.

5 is a block configuration diagram of the phase correction apparatus of the embodiment shown in FIG.

6 is a flowchart showing an operation of initial phase alignment in the embodiment shown in FIG.

7 is a timing chart for explaining the operation of initial phase alignment in the embodiment shown in FIG.

FIG. 8 is a flowchart of the automatic engagement of the embodiment shown in FIG.

FIG. 9 is a time chart for automatic engagement of the embodiment shown in FIG. 1;

10 is a block diagram of a clamp control circuit that re-clamps the gear to be ground in the embodiment shown in FIG.

11 is a flowchart illustrating an operation of re-clamping a gear to be ground by the clamp control circuit shown in FIG.

12 is a timing chart illustrating an operation of re-clamping a gear to be ground by the clamp control circuit shown in FIG.

13 is a diagram illustrating a meshing state between a gear to be ground and a gear that is re-clamped by the clamp control circuit shown in FIG.

[Explanation of symbols]

10 ... Gear grinding machine 14 ... Cutting table 16 ... Cutting motor 22 ... Grinding gear 26 ... Work spindle motor 38 ... Grindstone spindle motor 42 ... Grindstone 52 ... Electromagnetic clutch 98 ... Clamp control circuit 100 ... Load power detection circuit 102 ... sample hold circuit 106 ... peak detection circuit 108 ... rotation cycle calculation circuit 110 ... clamp delay time storage circuit 112 ... addition circuit 114 ... timer circuit T ... internal delay time T ₁ ... rotation cycle T ₂ ... clamp delay time

Claims (2)

(57) [Claims] 1. An automatic meshing method for a gear grinding machine, wherein a gear to be ground and a grinding tool are mutually rotated to grind a tooth surface of the gear to be ground, the method being performed by a grinding tool rotating means. The first step of engaging the grinding tool that rotates in parallel with the gear to be ground separated from the work rotating means by deactivating the clutch mechanism, and linking the gear to be ground with the rotation of the grinding tool A second step of calculating the rotation cycle of the gear to be ground that is interlocked with the rotation of the grinding tool, the rotation cycle of the gear to be ground, and a preset operation delay time of the clutch mechanism, A third step of calculating an internal delay time for ending the operation of the clutch mechanism when one rotation cycle of the gear to be ground ends, and a peak of load power of a grinding tool rotating means for rotating the grinding tool Inspect A fourth step of outputting, and counting the internal delay time with reference to the detected peak time of the load electric power, and when the internal delay time has elapsed, outputting a signal for activating the clutch mechanism. An automatic meshing method for a gear grinding machine, comprising: a fifth step. 2. An automatic meshing device for a gear grinding machine, wherein a gear to be ground and a grinding tool are mutually rotated to grind a tooth surface of the gear to be ground, wherein the gear to be ground is rotated. A first rotating means; a second rotating means for rotating the grinding tool; a clutch mechanism for connecting or disconnecting the gear to be ground and the first rotating means; and a deenergizing of the clutch mechanism. Rotation cycle calculation means for calculating the rotation cycle of the gear to be ground that is interlocked with the grinding tool which is separated from the first rotation means by the second rotation means and rotates under the action of the second rotation means. When one rotation cycle of the gear to be ground is completed, the operation delay time storage means stores the operation delay time of the clutch mechanism, the rotation cycle of the gear to be ground, and the operation delay time of the clutch mechanism. clutch An internal delay time calculating circuit for calculating an internal delay time for ending the operation of the structure, a load power detecting means for detecting load power of the second rotating means for rotating the grinding tool, and the load power detecting means. Clutch mechanism control means for starting counting of the internal delay time when a peak of load power of the second rotating means is detected, and for outputting a signal for energizing the clutch mechanism when the internal delay time has elapsed, An automatic meshing device for a gear grinding machine, comprising: