JP3132740B2 - Gear meshing method in gear processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to a gear meshing how the gear machining apparatus, in more detail, in the machine to perform finish machining of the gear, the phase matching of the tooth surfaces of the rotary tool and the gear efficiently gear meshing how the gear machining apparatus capable
About the.

[0002]

2. Description of the Related Art Hitherto, a gear forming apparatus for forming a gear with a rotary tool has been proposed. In the gear forming apparatus, a method is employed in which the rotating tool and the rotating tool are meshed with the same rotational phase in order to prevent the rotating tool and the gear from being damaged.

For example, Japanese Patent Application Laid-Open No. Hei 3-213212 discloses a method in which a shaving cutter is positioned at a predetermined position (reference point P1) based on a phase detection of a tool, and a positioning block is inserted between teeth constituting a gear to be processed. A configuration is disclosed in which both are positioned and engaged with each other.

However, actuators, hydraulic or pneumatic pipes, etc., must be provided as components for displacing the positioning block, which complicates the configuration and increases costs.

In view of the above, mechanical components such as a positioning block are omitted, and rotational phase detecting means for electrically detecting the rotational phase of the rotary tool and tooth face detecting means for detecting the peaks and valleys of the teeth of the gear to be processed are provided. A gear meshing device having a configuration including the same has been proposed. In the device, the gear to be processed is displaced to a position where a tooth crest (tooth-shaped portion) is detected by the tooth surface detecting means,
In response to this, the rotary tool is displaced to mesh with the gear to be processed, and the rotating phase of the rotary tool at that time is taught. At the time of machining, the rotating tool is displaced to the rotational phase position obtained by the teaching, and the gear to be processed is rotated to a position where the tooth ridge is detected by the tooth surface detecting means, so that the rotating tool meshes with the gear to be processed. Let it.

[0006]

In the above device,
The gear to be processed is stopped at the position where the tooth ridge is detected by the tooth surface detecting means, and meshing and processing are performed at that position. Therefore, when the work gear is displaced at a high speed, the stop of the work gear is caused by the time difference from when the tooth flank detecting means detects the tooth crest to when the work gear is stopped based on the detection signal. The position shifts.
As a result, it becomes difficult to rotate the gear to be processed at a high speed to set the position, and there is a risk that the gear meshing device may not mesh at a high speed, that is, may not improve the productivity.

SUMMARY OF THE INVENTION The present invention has been made in order to solve this kind of problem, and a gear machining apparatus capable of shortening the engagement time between a gear to be machined and a rotary tool and improving productivity. and to provide a gear meshing how the.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a gear machining apparatus which meshes a gear-shaped rotary tool with a gear to be machined, and relatively rotates these to perform gear machining. In the gear meshing method for meshing the work gear with the rotary tool based on data obtained by teaching, wherein the teaching operation includes:
Position the rotating tool at a predetermined rotation angle, and rotate the work gear in an arbitrary direction while approaching the rotating tool.
The tooth to be machined by relatively moving
A step of meshing the drive to the rotary tool, after the allowed relatively apart the work gear from said rotary tool, in response to the processed gear tooth profile portion between a and substantially on the pitch circle Sen
And the tooth profile is determined by the sensor.
Rotating the work gear in the first direction until the portion of the tooth profile side surface that is the shape portion is directly detected, and storing the amount of rotation, and meshing the work gear with the rotary tool. work to rotates the該被machining gear in a second direction opposite to said first direction, <br/> Symbol tooth profile section before through the sensor is detected directly, the detection state is completed
After rotation by the rotation amount of said stored from the site of the tooth sides, to process and, together meshed with the front Machinery rolling tool and the positioned the workpiece gear relatively proximity to positioning is stopped And a step.

It is preferable that the rotation amount of the gear to be processed is detected as a pulse signal, and the rotation of the gear to be processed is performed by a motor driven based on the pulse signal.

[0010]

[0011]

The method of gear engagement in the gear machining apparatus according to the present invention.
According to the method, when performing teaching, first, a work gear for teaching is rotated in an arbitrary direction and meshed with a rotary tool positioned at a predetermined rotation phase. Then, this workpiece gear are relatively spaced from the rotating tool by a displacement means, to rotate said workpiece gear in a first direction to the tooth profile portion is detected by the sensor, the rotation amount is remembers You.

[0012] Then, when machining the workpiece gear to rotate the該被machining gear in a second direction opposite the first direction, Se
Tooth profile portion is detected by the capacitors, detection after detection end
Stopping the workpiece gear in a position where the rotation amount becomes equal to the rotation amount of teaching for the work gear being remembers issued for positioning. Then, <br/> positioned with rotating tool by relatively close to the workpiece gear it is sufficient to mesh.

As described above, since the position of the gear to be processed is determined based on the amount of rotation detected at the time of teaching, unlike the method of positioning the gear at the position where the tooth profile is detected, the rotational speed of the gear to be processed is increased. Also, the gear to be processed can be stopped at an accurate position. For example, if the amount of rotation is detected in advance as a pulse signal and a motor is driven based on the pulse signal, the gear to be processed can be accurately and quickly positioned. As a result, the speed of the engagement between the rotating tool and the gear to be processed is increased, that is, the productivity is improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a gear meshing method in a gear machining apparatus according to the present invention will be described below in detail with reference to the accompanying drawings.

First, the overall structure of the gear meshing mechanism in the gear machining apparatus will be described, and the operation will be described based on the gear meshing method performed by the mechanism.

The gear meshing mechanism 10 is, as shown in FIG.
It has a whetstone 12. The grindstone 12 is a rotary tool having teeth 16 formed on an inner peripheral surface of a hole 14 defined therein. A to-be-processed gear (hereinafter, referred to as a gear) 18 enters the hole 14 of the grinding wheel 12 and meshes with the tooth 16.

A grindstone rotating motor (hereinafter referred to as a grindstone motor) 20 serving as a rotary tool driving means is provided for the grindstone 12, and a pulley 22 is mounted on a main shaft of the grindstone motor 20. The pulley 22 has a timing belt 24
Is suspended. Therefore, the rotational force is transmitted to the grinding wheel 12 from the grinding wheel motor 20 via the pulley 22 and the timing belt 24. A rotary encoder (rotary tool rotation phase detecting means) 26 is mounted on the grindstone motor 20, and the rotation amount of the grindstone motor 20 is, as shown in FIG.
The driving signal is input to a control unit (control means) 28 via the encoder 26, and the driving of the grinding wheel motor 20 is controlled based on a feedback signal from the control unit 28.

The torque is transmitted to the gear 18 from a pulse motor (working gear driving means) 30 via a clutch 32 and a gear 34. As shown in FIG. 1, the amount of rotation of the gear 18 is input to the control unit 28 via a rotary encoder (processed gear rotation phase detecting means) 36 mounted on a pulse motor 30 and the control unit 28 The pulse motor 30 is driven via the pulse motor driver 38 on the basis of the feedback signal from.

A sensor 40 is provided on one side surface of the gear 18, and this sensor 40 detects a portion (see FIG. 6) of the gear 18 corresponding to a substantially pitch circle of the tooth side surface (tooth shape portion) 50. ing. The detection signal of the sensor 40 is input to the control unit 28.

The control unit 28 includes a counter 52 for counting the number of pulses of the pulse signal from the encoder 36, a memory (storage means) 54 for storing the number of pulses counted by the counter 52, and a memory 54 for storing the number of pulses. A comparison circuit (comparing means) 56 for comparing the number of pulses obtained by the counter 52 with the number of pulses counted by the counter 52.

The teaching operation of the meshing of the grinding wheel 12 and the gear 18 in the gear meshing mechanism 10 will now be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG.

First, as shown in FIG. 3, the gear 18 is caused to enter the hole 14 of the grindstone 12 by a displacement means (not shown). At this time, the grindstone motor 20 is driven in advance by a signal from the control unit 28, and the grindstone 12 is positioned at a predetermined position (step S1).

Next, as shown in FIG. 4, the grindstone 12 is moved closer to the gear 18 by a displacement means (not shown), and the gear 18 is manually rotated clockwise (second direction) so that the grindstone 12 and the gear 18 are rotated. (Step S2). In this case, the rotation direction of the gear 18 may be clockwise (second direction).
The gear 18 may be rotated counterclockwise (first direction), or the gear 18 may be rotated by another rotary drive source (not shown ) without manual operation.

Subsequently, as shown in FIG.
And the whetstone 12 is moved by the displacement means.
Is separated from the gear 18. Further, the counter 52 built in the control unit 28 is reset (step S3).
Therefore, the pulse motor 30 is driven to rotate in the reverse direction to rotate the gear 18 in a counterclockwise direction (first direction). As a result, a pulse signal corresponding to the rotation amount is transmitted from the encoder 36 to the control unit 2.
8 (step S4). When the sensor 40 detects the tooth profile side surface 50 (see FIG. 6) of the tooth 42 of the gear 18 (sensor 40, OFF → ON),
The counter 52 stops counting pulse signals and stops the pulse motor 30 (FIG. 7).
And FIG. 8). The count number of the pulse signal is stored in the memory 54 of the control unit 28 and the clutch 3
2 is released (steps S5 and S6).

Next, a description will be given, with reference to the flow chart shown in FIG. 9, of the step of inputting and machining the gear 18 equivalent to the gear 18 in the gear meshing mechanism 10 in which the teaching has been completed.

First, as in the case of teaching, FIG.
As shown in (5), the gear 18 is caused to enter the hole 14 of the grindstone 12, and the grindstone motor 20 is driven by a signal from the control unit 28 to position the grindstone 12 at a predetermined position (step S7).

Next, while connecting the clutch 32,
The counter 52 of the control unit 28 is reset (step S
8). Then, the pulse motor 30 is rotated forward by the drive signal from the control unit 28, and the gear 18 is rotated clockwise (second direction) (step S9).

In this state, as shown in FIG.
0 detects the tooth side surface 50 of the first tooth 42a of the gear 18 (FIG. 6, sensor 40, OFF → ON), and as shown in FIG. 10, the detection state ends (FIG. 6, sensor 40, O).
From N → OFF), the number of pulses from the encoder 36 is counted by the counter 52 of the control unit 28 (step S10).

The number of pulses is input to a comparison circuit 56,
Therefore, the number of pulses is compared with the number of pulses stored in the memory 54 at the time of teaching. When the pulse numbers match, the pulse motor 30 is stopped (see FIG. 5) (step S1).
1).

Here, as shown in FIG. 4, the whetstone 12 and the gear 18 are reliably meshed by displacing the whetstone 12 in the direction of the gear 18 by a displacing means (not shown) (step S12).

Finally, the clutch 32 is released (step S13).

Thereafter, the grindstone 12 is rotated by driving the grindstone motor 20, and the teeth 42 of the gear 18 are ground.

As described above, the gear meshing mechanism 1 according to this embodiment is
0, the gear 18 is moved from the meshed state to the first state during teaching.
The counter is rotated in the direction (counterclockwise) and the amount of rotation until the tooth profile side surface 50 of the tooth 42 is detected by the sensor 40 is counted by the counter 52 by the number of pulses from the encoder 36 and stored in the memory 54. At the time of processing, the gear 18 is rotated in a second direction (clockwise) opposite to the first direction,
When the state where the first tooth profile 50a of the tooth 42a is detected by the sensor 40 is completed (FIG. 6, sensor 40, ON
From OFF) to the encoder 3 by the counter 52.
The number of pulses from step 6 is counted, and the number of pulses is compared with the number of pulses stored in the memory 54 by the comparison circuit 56. When the number of pulses matches, the pulse motor 30 is stopped to position the gear 18.

Therefore, at the time of teaching, the pulse motor 30 is controlled based on the number of pulses stored in the memory 54 of the control unit 28 to obtain the meshing state between the grinding wheel 12 and the gear 18, so that the rotation speed of the pulse motor 30 is improved. This does not reduce the positioning accuracy. Therefore, the grinding wheel 12 and the gear 18 in the gear meshing mechanism 10 are efficiently meshed.

[0035]

[0036]

According to the gear meshing how the gear machining apparatus according to the present invention, the following effects are obtained.

Since the position of the gear to be processed is determined based on the rotation amount detected at the time of teaching, unlike the method of positioning the gear at the position where the tooth profile is detected, even if the rotation speed of the gear to be processed is increased, the position of the gear to be processed is not increased. The gear can be stopped at the correct position. For example, if the rotation amount is detected in advance as a pulse signal and a motor is driven based on the pulse signal, the gear to be processed can be accurately and quickly positioned. As a result, the speed at which the rotary tool and the gear to be processed are meshed with each other is increased, that is, the processing efficiency of the gear to be processed is improved as a whole.

[Brief description of the drawings]

FIG. 1 is an overall schematic explanatory view of a gear meshing mechanism according to an embodiment of the present invention.

FIG. 2 is a flowchart of teaching in a gear meshing method according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a gear meshing method according to an embodiment of the present invention.

FIG. 4 is a state explanatory view in a gear meshing method according to an embodiment of the present invention.

FIG. 5 is an explanatory diagram of a gear meshing method according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram of a tooth tip of a gear used in the gear meshing mechanism according to one embodiment of the present invention.

FIG. 7 is a timing chart of each signal in the control unit in the gear meshing method according to one embodiment of the present invention.

FIG. 8 is a state explanatory view in a gear meshing method according to one embodiment of the present invention.

FIG. 9 is a flowchart of processing in a gear meshing method according to an embodiment of the present invention.

FIG. 10 is a timing chart of each signal in the control unit in the gear meshing method according to one embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Gear meshing mechanism 12 ... Grinding stone 18 ... Gear 20 ... Grinding stone motor 26, 36 ... Encoder 28 ... Control part 30 ... Pulse motor 32 ... Clutch 40, 40a ... Sensor 50 ... Tooth profile side 54 ... Memory 56 ... Comparison circuit

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hideyuki Arai 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. (72) Inventor Masashi 1-10-1 Shinsayama, Sayama City, Saitama Honda Engineering (56) References JP-A-60-249525 (JP, A) JP-A-2-250718 (JP, A) JP-B-62-38089 (JP, B2) (58) Fields investigated (Int. Cl. ⁷ , DB name) B23F 23/00 B23F 5/00

Claims (2)

(57) [Claims] 1. A gear processing apparatus for engaging a gear-shaped rotary tool and a gear to be processed and relatively rotating them to perform gear processing, wherein the gear to be processed is formed based on data obtained by teaching. A gear meshing method for meshing with a rotating tool, wherein the teaching operation includes positioning the rotating tool at a predetermined rotation angle, and rotating the work gear in an arbitrary direction.
While relatively moving in the direction approaching the rotary tool
By the step of meshing the workpiece gear to the rotary tool and the workpiece gear is relatively spaced from the rotating tool
Thereafter , the sensor is relatively positioned between the tooth-shaped portions of the gear to be processed and substantially on the pitch circle , and
Rotating the work gear in the first direction until the portion of the tooth profile side surface that is the tooth profile portion is directly detected, and storing the amount of rotation, and rotating the work gear in the rotation direction. The operation of meshing with the tool includes rotating the gear to be processed in a second direction opposite to the first direction, directly detecting the tooth profile portion via the sensor, and ending the detection state of the tooth profile side surface. after the site is rotated by the rotation amount which is the storage, the step of positioning is stopped, and the step of meshing with each other the workpiece gear positioned before and Machinery rolling tool is relatively close, the A gear meshing method in a gear machining device, comprising: 2. The gear meshing method according to claim 1, wherein the amount of rotation of the processed gear is detected as a pulse signal, and the rotation of the processed gear is controlled by a motor driven based on the pulse signal. A gear meshing method in a gear machining device, which is performed.