JP7237422B2 - inspection equipment - Google Patents

Description

The present invention relates to an inspection apparatus used for inspection of finished products of automatic transmissions for vehicles.

2. Description of the Related Art In an automatic transmission for a vehicle, a plurality of gear sets are provided on a rotational driving force transmission path, and rotation is transmitted in each gear set via gear parts that mesh with each other.
A gear part is produced by the following procedures as an example.
(1) Hot forging of a rod-shaped material forms a large-diameter portion in the middle of the shaft in the longitudinal direction. (2) Forming teeth on the outer periphery of the large-diameter portion by cutting. (3) Carrying out a carburizing treatment on the gear part having the toothed portion. (4) In the carburized gear component, the surfaces of the tooth portions that serve as the meshing surfaces with other gear components are polished.

To polish the tooth, the area of the tooth that will be the meshing surface with other gear parts and the side area that will be the detection surface by the sensor are polished with a grindstone to remove the material surface that has been oxidized by the carburization process. carried out for
However, in the case of helical gears with curved teeth, such as gear parts used in automatic transmissions for vehicles, it is difficult to completely remove the oxidized material surfaces of the teeth.

Here, the oxidized material surface remaining on a part of the tooth portion is called black scale residue because it exhibits a black color. In the case of gear parts, if black scale remains in the meshing portion with other gear parts, it causes abnormal noise during transmission of rotation.
Therefore, in the production line of the automatic transmission, an inspection device for inspecting the presence or absence of abnormal noise is provided in the process of inspecting finished products.

Patent Literature 1 discloses an inspection device for inspecting the presence or absence of abnormal noise, which device is for identifying a gear component with an abnormality.

Japanese Patent No. 4779032

In this type of inspection apparatus, when performing an operation test on a finished automatic transmission, vibration data is acquired in parallel with the operation test, and the presence or absence of abnormal noise is determined from the acquired vibration data.

Here, since the side area of the gear component may be used as the detection surface of the sensor, if the side area is excessively polished, detection by the sensor will be impaired.
However, abnormal noise is often generated due to unshaving, and excessive polishing cannot be detected by inspection of abnormal noise.
Therefore, it is necessary to separately prepare a dedicated inspection device and an inspection process in order to inspect for excessive polishing. As a result, the inspection of the finished automatic transmission becomes longer.
Therefore, there is a demand for an inspection for over-polishing in a shorter period of time.

One aspect of the invention is
Vibration detection means for detecting vibration of the object to be inspected;
a processing means for performing synchronous averaging processing of the vibration signal output by the vibration detection means;
determination means for determining whether or not there is an abnormality in a gear part constituting a gear set in the inspection object by comparing the result of the synchronous averaging process of the vibration signal with a first threshold value. in the device,
a rotation sensor disposed opposite to the side surface of the area provided with the toothed portion on the outer periphery of the gear component;
conversion means for converting the pulse signal output by the rotation sensor into a voltage signal by F/V conversion ,
The processing means performs synchronous averaging processing after removing the DC component from the voltage signal converted by the conversion means,
The determination means determines whether or not there is an abnormality in the side surface shape of the tooth viewed from the rotation sensor by comparing the result of the synchronous averaging of the voltage signal with a second threshold value ,
The synchronous averaging process of the vibration signal is a process of synchronizing and averaging the vibration waveforms during one rotation of the gear component on which the rotation sensor is arranged to face each other,
The synchronous averaging process of the voltage signal is a process of synchronizing and averaging the voltage signals during one rotation of the gear component on which the rotation sensor is arranged to face the inspection apparatus.

According to the present invention, when an operation test is performed on a finished product of an automatic transmission, the presence or absence of an abnormality in the gear part and the presence or absence of an abnormality in the side surface shape of the tooth portion are checked by the same inspection device in parallel with the operation test. can be determined using
Since abnormalities in the side surface shape of the tooth portion occur when the tooth is over-ground, it is possible to inspect the case where the tooth is over-ground in a shorter period of time.

1 is a schematic configuration diagram of an inspection device according to an embodiment; FIG. It is a figure explaining the vibration data input into a control device, and the processing of the vibration data in a control device. It is a figure explaining a gear component. FIG. 5 is a diagram illustrating the shape of a tooth portion having an over-polished area and its effect on a pulse signal; It is a figure explaining the voltage signal input into a control apparatus, and the process of the voltage signal in a control apparatus.

Embodiments of the present invention will be described below.
FIG. 1 is a diagram showing a schematic configuration of an inspection apparatus 10 according to this embodiment.

The inspection device 10 has a vibration sensor 11, a rotation sensor 12, a control device 13, and an F/V converter 14 (period/voltage converter).
An object to be inspected by the inspection apparatus 10 is an automatic transmission AT for a vehicle. In an automatic transmission AT for a vehicle, a plurality of gear sets α and β are provided on a rotational driving force transmission path.
The inspection device 10 is provided for inspecting whether or not there is a defect in the gear parts 4, 5, 6, and 7 constituting the gear sets α and β.

The process of manufacturing a gear component includes a step of polishing the surface of the tooth portion that serves as the meshing surface with other gear components. This step aims at (a) removing the material surface oxidized by the carburizing treatment and (b) removing burrs.

In the gear component, if the oxidized material surface is insufficiently removed in the region of the tooth portion, abnormal noise will occur at the meshing portion with other gear components during the transmission of the rotational driving force.
A side area of the tooth portion in the rotation axis direction of the gear component serves as a detection surface by the rotation sensor 12 . Therefore, if the material surface of the side surface region of the tooth portion is excessively polished, the shape of the side surface region of the tooth portion will be different from the prescribed shape, and as a result, detection by the rotation sensor 12 will be hindered.

The inspection apparatus 10 of the present embodiment is installed in a process of inspecting finished products in a production line for automatic transmissions.
Based on the output signals of the vibration sensor 11 and the rotation sensor 12, the inspection device 10 inspects (inspection 1) whether or not the surface material of the gear component is insufficiently removed, and whether or not the surface of the material is excessively shaved. This inspection (inspection 2) can be performed in parallel in one operation test of the finished automatic transmission.

The vibration sensor 11 is provided directly above the approximate center of the automatic transmission AT. Vibration sensor 11 detects vibration of automatic transmission AT, which is an object to be inspected, and outputs a signal (vibration signal) indicating the detected vibration to control device 13 when performing an operation inspection of a finished product.

The rotation sensor 12 detects the rotation speed of the gear component 7 (for example, final gear) and the rotation axes X1, X2, and X3, and detects a pulse signal indicating the rotation speed of the gear component 7 and the rotation of the rotation axes X1, X2, and X3. A pulse signal indicating the speed is output to the control device 13 .
Although only one rotation sensor 12 is shown in FIG. 1 as a representative, the automatic transmission AT is provided with a rotation sensor 12 for each detection target. A pulse signal indicating the rotation speed of is output to the control device 13 .
A pulse signal indicating the rotation speed of the gear component 7 (for example, final gear) is also output to the F/V converter 14 .

The F/V converter 14 converts the rotation pulse signal input from the rotation sensor 12 into a voltage signal by F/V conversion (cycle/voltage conversion). The converted voltage signal is output to the control device 13 .

As shown in FIG. 1, the output signal (vibration signal) of the vibration sensor 11 is input from channel 1 (Ch1) in the input/output port of the inspection apparatus 10. As shown in FIG. A pulse signal of the rotation sensor 12 is inputted from an input port In in the input/output ports. The output signal (voltage signal) of the F/V converter 14 is input from channel 2 (Ch2) in the input/output port of the inspection device 10 .

The control device 13 includes storage media such as RAM, ROM, and nonvolatile memory, and a CPU. Based on the program stored in the storage medium, the control device 13 inspects whether or not the removal of the surface material of the gear component is insufficient (inspection 1), and inspects whether or not the surface of the material is excessively shaved. (Inspection 2) is performed.

The control device 13 functions as processing means 131 for performing synchronous average processing and determination means 132 for determining the presence or absence of an abnormality in gear parts based on a program stored in a storage medium.

The processing means 131 performs synchronous averaging processing of the vibration signal output by the vibration sensor 11 (vibration detection means) for detecting the vibration of the automatic transmission AT (object to be inspected), and the F/V converter 14 (conversion means) converts the vibration signal. Synchronous averaging of the voltage signal is performed.

Judgment means 132 judges whether or not there is an abnormality in the gear parts forming the gear set in the automatic transmission AT (object to be inspected) based on the result of the synchronous averaging process of the vibration signal. Furthermore, based on the result of the synchronous averaging process of the voltage signal, it is determined whether or not there is an abnormality in the side shape of the tooth portion 71 viewed from the rotation sensor 12 side.

Inspection 1 and inspection 2 performed by the control device 13 of the inspection device 10 will be described below.
[Inspection 1]
First, a description will be given of the processing when performing inspection 1 to determine whether or not the removal of the surface material of the gear component is insufficient.
In the following explanation, the gear set α is the gear set to be inspected, and one tooth of the plurality of tooth portions possessed by one of the gear parts 4 constituting the gear set α has insufficient removal of the surface material. It is explained assuming that there is a In this case, when the rotational driving force is transmitted between the gear parts 4 and 5, an abnormal noise is generated and at least one of the gear parts 4 is dented.

FIG. 2 is a diagram for explaining vibration data input to the control device 13 and processing of the vibration data in the control device 13. As shown in FIG.
FIG. 2(a) is a diagram for explaining the waveform of vibration data input from the vibration sensor 11 to the control device 13. FIG. FIG. 2(b) is a diagram showing the vibration waveform B after performing the envelope processing on the vibration data of FIG. 2(a) together with the vibration waveform A before the envelope processing. (c) of FIG. 2 is a diagram in which the vibration waveforms C and D after the synchronous averaging process (synchronous averaging process) is performed on the vibration waveform A are displayed in a superimposed manner. A vibration waveform C is a vibration waveform of the gear component 4 with dents, and a vibration waveform D is a vibration waveform of the gear component 5 without dents.

Vibration data having a waveform as shown in FIG.
The control device 13 extracts a signal component in a frequency band corresponding to the natural frequency of the gear set α to be inspected from the vibration data (vibration signal) shown in FIG. 2(a). A vibration waveform A thus obtained is indicated by a thin line in FIG. 2(b).
A peak P1 that appears at regular time intervals in the vibration waveform A of the gear set to be inspected corresponds to vibration (abnormal noise) caused by a gear component with dents.

The control device 13 obtains a vibration waveform B obtained by extracting the outline of the vibration waveform A by performing envelope processing on the vibration waveform A shown in FIG. 2(b).
Here, the envelope processing is also called envelope processing, and is processing for extracting the outline of the amplitude. In envelope processing, a complex number is calculated from the rectangular coordinate values of the vibration waveform of the vibration signal and the waveform after Hilbert transform, and the absolute value waveform of the calculated complex number is converted into an envelope to obtain an output proportional to the envelope of the vibration waveform. .

After performing a synchronous averaging process on the vibration waveform B in FIG. 2(b), it is separated into a vibration waveform of one gear component of the gear set to be inspected and a vibration waveform of the other gear component. Thereby, the vibration waveform C and the vibration waveform D shown in (c) of FIG. 2 are obtained.
In FIG. 2C, the horizontal axis indicates time and the vertical axis indicates amplitude.

Here, the synchronous averaging process is a process for extracting data of components matching a specific period from a vibration waveform (signal waveform) containing noise. This is the processing for specifying the contribution of X3.

In the synchronous averaging process, the following processes are performed for each vibration waveform corresponding to each of the rotation axes X1, X2, and X3.
(I) Calculate the time required for each of the rotation axes X1, X2, and X3 to make one rotation from the output pulse of the rotation sensor 12;
(II) Acquire vibration waveforms for each of the rotation axes X1, X2, and X3 while the rotation axis rotates a specified number of times.
(III) The vibration waveform during the specified number of rotations of the rotating shaft is divided into vibration waveforms during one rotation of the rotating shaft, and each of the obtained vibration waveforms for one rotation is synchronized and superimposed. and add the output values.
(IV) Divide the added output value by a specified number of times to average the vibration waveform (output value) during one rotation of the rotating shaft.

Then, as shown in vibration waveform C in FIG. becomes a low vibration waveform.

Subsequently, the control device 13 compares the vibration waveform C and the vibration waveform D obtained by the synchronous averaging process with the threshold value Th1, and finds that there is a region in which the output value is greater than the threshold value Th1 in the vibration waveform C and the vibration waveform D. confirm whether or not
If there is a region where the output value is greater than the threshold value Th1, it is determined that there is a gear with dents, and if it does not exist, it is determined that there is no gear with dents.

In the case of (c) of FIG. 2, since the inspection target is the gear set α, it is determined that the gear component 4 fixed to the rotating shaft X1 has a dent.

Here, the case where the inspection target is the gear set α has been described as an example. Regarding the other gear set β, a process of confirming the presence or absence of dents is executed in parallel with the process of confirming the presence or absence of dents on the gear set α.

If the automatic transmission AT has a plurality of gear sets to be inspected, the process of confirming the presence or absence of dents on each of the gear sets is acquired during one operation test of the automatic transmission AT. is executed using the data obtained.
That is, even if there are a plurality of gear sets to be inspected, it is possible to avoid performing the operation test multiple times.

[Inspection 2]
Next, a description will be given of the processing when performing inspection 2 to determine whether the material surface of the gear component is over-polished.
In the following description, the gear set β is the gear set to be inspected, and one tooth of the plurality of tooth portions 71 of one of the gear parts 7 that constitute the gear set β is over-polished to the material surface. It is assumed that there is a

3A and 3B are diagrams for explaining the gear part 7 (final gear), FIG. 3A is a perspective view of the gear part 7, and FIG. is a view seen from the radial direction.
FIG. 4 is a diagram for explaining the shape of the tooth portion 71X having the over-ground region Rx in the tooth portion 71 of the gear component 7 and the influence of the shape of the tooth portion 71X on the pulse signal.
FIG. 4(a) is a view of the side area 701 of the gear component 7 viewed from the direction of the rotation axis X, and is an enlarged view of the periphery of the outer peripheral tooth portion 71. FIG. FIG. 4(b) is a diagram for explaining the output pulse of the rotation sensor 12, showing the influence of the over-polished region Rx.
In addition, in FIG. 4(a), the tooth portions 71 arranged in an arc shape on the outer periphery of the gear component 7 are shown arranged in a straight line for convenience of explanation.

FIG. 5 is a diagram for explaining signals input to the control device 13 and processing of the signals in the control device 13. As shown in FIG.
FIG. 5(a) is a diagram for explaining the waveform (signal waveform) of the signal input to the F/V converter 14 (period/voltage converter) . FIG. 5(b) is a diagram showing a signal waveform E after F/V conversion processing is performed on the voltage signal of FIG. 5(a). (c) of FIG. 5 shows the signal waveform F after filtering the signal waveform E. FIG.
A signal waveform F is the waveform of the gear component 7 (final gear) having an over-ground region Rx.

As shown in FIG. 3, when viewed from the radial direction of the rotation axis X, the toothed portion 71 on the outer periphery of the gear part 7 (final gear) is inclined at a predetermined angle with respect to the rotation axis X, and It is a helical gear that is curved such that the tooth line is twisted from the side surface 70a toward the other side surface 70b.

In the gear component 7 , a predetermined width range (side area 701 ) on the outer peripheral side where the toothed portion 71 is formed on one side surface 70 a in the rotation axis X direction serves as a detection surface by the rotation sensor 12 .
Here, the side area 701 is polished by phrasing. In the phrasing process, a tool with grinding teeth is brought into contact with the rotated gear part 7 to grind the lateral region 701 .
In phrasing, the contact angle between the grinding tooth and the flank region is likely to change because the stress due to the rotation of the gear component acts on the tool when the grinding tooth contacts the flank region. When the contact angle changes, there is a tendency for over-ground regions Rx (see FIG. 4(a)) to be formed on the tooth flank regions with which the grinding tooth first contacts.

As shown in (b) of FIG. 3, the rotation sensor 12 is provided facing the side area 701 from the rotation axis X direction. The detection surface 12a of the rotation sensor 12 faces the line segment Lm (see (a) of FIG. 4) passing through substantially the middle of the side surface region 701 in the radial direction of the rotation axis X. As shown in FIG.

The rotation sensor 12 outputs an ON signal when the tooth groove portion 72 passes over the extension of the detection surface 12a, and outputs an OFF signal when the tooth portion 71 passes (see FIG. 4B).
Therefore, in the case of the gear component 7 in which the side area 701 is appropriately ground, the width W in the circumferential direction around the rotation axis X between the tooth portion 71 and the tooth groove portion 72 adjacent to the tooth portion 71 is It is substantially constant over the entire circumference in the circumferential direction. Therefore, when the gear component 7 rotates at a constant speed, the pulse signal output by the rotation sensor 12 has a constant time width t from the OFF signal to the ON signal.

As shown in FIG. 4(a), when the material surface of the side surface region 701 is over-polished by polishing after the carburizing treatment, since the gear part 7 is a helical gear, only the over-polished region Rx , the width W of the tooth portion 71 in the circumferential direction around the rotation axis X becomes narrower.

Then, the output pulse of the rotation sensor 12 is affected by the excessively polished region Rx, and the time width t from the OFF signal to the ON signal changes before and after the tooth portion 71X having the region Rx.
That is, the time width from the OFF signal to the ON signal corresponding to the tooth portion 71X having the region Rx and the tooth groove portion 72 is affected by the region Rx and is shortened by the time width a (ta).

In the rotational direction of the gear component 7, the time width from the OFF signal to the ON signal corresponding to the tooth portion 71 and the tooth groove portion 72 adjacent on the upstream side of the tooth portion 71X is affected by the region Rx and is reduced by the time width a. longer (t+a).

As a result, the control device 13 to which the pulse signal of the rotation sensor 12 is input cannot properly detect the rotational speed of the gear component 7 .

In this embodiment, a pulse signal from the rotation sensor 12 is input to the controller 13 via the F/V converter 14 in order to appropriately detect the presence of the tooth portion 71X having the region Rx. Then, the control device 13 performs inspection 2 on the voltage signal (signal waveform) input via the F/V converter 14 to confirm the presence or absence of the tooth portion 71X having the region Rx.

In the F/V converter 14, the rotation pulse signal input from the rotation sensor 12 is converted by F/V conversion (cycle/voltage conversion) , and the controller 13 outputs the signal shown in FIG . A signal having a waveform as shown in is input.

In the control device 13, the input voltage signal is subjected to DC component removal, high-speed sampling , and filtering to generate a signal as shown in FIG. 5( c ). get the waveform .
In (b) of FIG. 5, the horizontal axis is the time t, and the vertical axis is the number of revolutions of the rotating shaft X3.
A peak P2 appearing at regular time intervals in the signal waveform E is caused by the tooth portion 71X having the over-polished region Rx.

The control device 13 performs synchronous averaging processing on the signal waveform shown in FIG. 5( c ).
In the synchronous averaging process for the signal waveform ,
(I) A signal waveform during a predetermined number of rotations of the rotating shaft X3 is divided into signal waveforms during one rotation of the rotating shaft X3, and each of the obtained signal waveforms for one rotation is synchronized. and add the output values of the signals.
(II) The output value of the added signal is divided by a predetermined number of times to average the signal waveform (output value) during one rotation of the rotating shaft .

Subsequently, the control device 13 compares the signal waveform obtained by the synchronous averaging process with the threshold value Th2 to check whether or not there is a region in the signal waveform where the output value is greater than the threshold value Th2. do.
If there is a region whose output value is greater than the threshold value Th2, it is determined that there is a tooth portion 71X having the over-polished region Rx. It is determined that there is no 71X.

In the case of (c) of FIG. 5, it is determined that there is a tooth portion 71X having an over-ground region Rx.

In this way, the processing for the inspection 2 of whether or not the tooth portion 71X having the over-polished region Rx exists is performed using the data acquired during one operation test of the automatic transmission AT. executed.
Since this inspection 2 can be executed in parallel with the above-described inspection 1, it is not necessary to perform the operation test multiple times when performing the inspection 1 and the inspection 2. FIG.

In the case of the conventional example in which the pulse signal of the rotation sensor 12 is F/V-converted and taken into the control device 13 for processing, inspection 2 is carried out according to the following procedure.
(i) A dedicated operation pattern for "inspection 2" is prepared separately from the pattern for inspection of the finished automatic transmission.
(ii) The automatic transmission is separately driven with a dedicated operation pattern for "Inspection 2", and the output signal of the rotation sensor 12 is read by an external take-out terminal (data logger).
(iii) The read output signal of the rotation sensor 12 is analyzed by a dedicated analysis device to determine whether or not there is a tooth portion 71X having an over-polished region Rx.

As described above, in the case of this embodiment, vibration data and voltage signals are acquired in parallel with the operation test of the automatic transmission. Then, the determination of the presence or absence of abnormal noise by processing the acquired vibration data and the determination of the presence or absence of the tooth portion 71X having the over-polished region Rx by processing the acquired voltage signal can be performed in parallel with the operation test.

Therefore, it is possible to determine whether or not there is a problem in the gear set in a shorter time than in the case of the conventional example. As a result, the residence time in the inspection process of the finished automatic transmission can be shortened, so that an improvement in the production efficiency of the automatic transmission can be expected.

In this embodiment, the inspection target of the inspection device is an automatic transmission for a vehicle. The inspection target of the inspection device according to the present invention is not limited to the automatic transmission.
For example, the present invention can also be applied to determine whether there is an abnormality in gear parts in other devices having a plurality of gear sets inside, such as a speed reducer having a reduction gear train.

As described above, the inspection apparatus 10 according to this embodiment has the following configuration.
(1) The inspection device 10
a vibration sensor 11 (vibration detection means) for detecting vibration of the automatic transmission AT (object to be inspected);
and a controller 13 .
The control device 13 is
a processing means 131 for performing synchronous averaging processing of the vibration signal output by the vibration sensor 11;
Determining means 132 for determining whether or not there is an abnormality in the gear parts 4, 5, 6, and 7 constituting the gear sets α and β in the automatic transmission AT (object to be inspected) based on the result of the synchronous averaging process. Function.
The inspection device 10 is
a rotation sensor 12 disposed opposite to the side surface of the region provided with the tooth portion 71 on the outer periphery of the gear component 7;
and an F/V converter 14 (converting means) that converts the pulse signal output by the rotation sensor 12 into a voltage signal.
In the control device 13,
The processing means 131 performs synchronous averaging processing of the voltage signal converted by the F / V converter 14 (conversion means),
The determining means 132 determines whether or not there is an abnormality in the side surface shape of the tooth portion 71 viewed from the rotation sensor 12 side, based on the result of the synchronous averaging process of the voltage signal.

With this configuration, according to the present invention, when conducting an operation test of the finished product of the automatic transmission AT, in parallel with the operation test, the presence or absence of abnormality in the gear parts 4 to 7 and the tooth portion 71 are checked. The same inspection apparatus 10 can be used to determine whether there is an abnormality in the side surface shape.
Since an abnormality in the side surface shape of the tooth portion 71 occurs when the tooth portion 71 is over-polished, it is possible to inspect the case where the tooth portion 71 is over-polished in a shorter time.

The inspection apparatus 10 according to this embodiment has the following configuration.
(2) The gear component 7 inspected for abnormalities in the side surface shape of the tooth portion 71 is a helical gear.

The gear component 7 (helical gear), which is a helical gear, has tooth portions 71 on the outer circumference of the gear inclined at a predetermined angle with respect to the rotation axis X when viewed from the radial direction of the rotation axis X, and The tooth line is curved so as to be twisted from the side surface 70a toward the other side surface 70b.
Here, polishing of the side surface area of the tooth portion is performed, for example, by phrasing. In the framing process, when the grinding teeth of the tool come into contact with the side area, stress due to the rotation of the gear component acts on the tool, and the contact angle between the grinding teeth and the side area tends to change. When the contact angle changes, an over-ground region Rx (see FIG. 4(a)) is likely to be formed in the lateral region of the tooth with which the grinding tooth first contacts.
Therefore, the helical gear is a gear component in which the side surface shape of the tooth portion 71 is relatively likely to be abnormal. The presence or absence of abnormalities in the side surface shape of the teeth of such gear parts can be inspected in parallel with the operation test of the automatic transmission AT without preparing a separate dedicated device or process. It takes less time and can be done properly.

The inspection apparatus 10 according to this embodiment has the following configuration.
(3) The inspection device 10 is provided in the process of conducting an operation test of the automatic transmission AT (object to be inspected).
Determination (inspection 1) of the presence or absence of abnormality in the gear parts 4 to 7 is performed based on the vibration of the automatic transmission AT detected by the vibration sensor 11 (vibration inspection means) during the operation test of the automatic transmission AT. be.
The determination of the presence or absence of an abnormality in the side surface shape of the tooth portion 71 (inspection 2) is performed based on the rotation of the gear component 7 in the automatic transmission AT detected by the rotation sensor 12 during the operation test of the automatic transmission AT. .

With this configuration, inspection 1 and inspection 2 can be performed in parallel with the operation test of the automatic transmission AT.
For inspection 1 and inspection 2, there is no need to separately prepare an inspection process or an operation pattern of the automatic transmission AT for inspection.
Thereby, inspection 1 and inspection 2 can be performed more easily.

The inspection apparatus 10 according to this embodiment has the following configuration.
(4) Determining the presence or absence of abnormality in gear parts 4 to 7 (inspection 1) and determining the presence or absence of abnormality in the side surface shape of tooth portion 71 (inspection 2) are conducted in parallel with the operation test of automatic transmission AT. be implemented.

With this configuration, after the operation test of the automatic transmission AT, it is possible to determine whether or not there is an abnormality by the inspections 1 and 2 in parallel. No need to work with patterns.
As a result, the time required after the operation test of the automatic transmission AT, the inspection 1, and the inspection 2 can be shortened. As a result, the time during which the automatic transmission AT stays in the process for the completion inspection is shortened, so an improvement in the production efficiency of the automatic transmission can be expected.

Although the embodiments of the present invention have been described above, the present invention is not limited only to the aspects shown in these embodiments. It can be changed as appropriate within the scope of the technical idea of the invention.

4, 5, 6 gear component 7 gear component 70a, 70b side surface 71 tooth portion 71X tooth portion 72 tooth groove portion 10 inspection device 11 vibration sensor 12 rotation sensor 13 control device 14 F/V converter 131 processing means 132 determination means

701 Side area AT Automatic transmission A, B, C, D Vibration waveform E, F Signal waveform Lm Line segment P1, P2 Peak Pmax Peak value Rx Area Th1 Threshold Th2 Threshold X, X1, X2, X3 Axis of rotation α, β Gear set

Claims (4)

Vibration detection means for detecting vibration of the object to be inspected;
a processing means for performing synchronous averaging processing of the vibration signal output by the vibration detection means;
determination means for determining whether or not there is an abnormality in a gear part constituting a gear set in the inspection object by comparing the result of the synchronous averaging process of the vibration signal with a first threshold value. in the device,
a rotation sensor disposed opposite to the side surface of the area provided with the toothed portion on the outer periphery of the gear component;
conversion means for converting the pulse signal output by the rotation sensor into a voltage signal by F/V conversion ,
The processing means performs synchronous averaging processing after removing the DC component from the voltage signal converted by the conversion means,
The determination means determines whether or not there is an abnormality in the side surface shape of the tooth viewed from the rotation sensor by comparing the result of the synchronous averaging of the voltage signal with a second threshold value ,
The synchronous averaging process of the vibration signal is a process of synchronizing and averaging the vibration waveforms during one rotation of the gear component on which the rotation sensor is arranged to face each other,
The inspection apparatus according to claim 1, wherein the synchronous averaging process of the voltage signal is a process of synchronizing and averaging the voltage signals during one rotation of the gear component on which the rotation sensor is arranged to face. 2. The inspection apparatus according to claim 1, wherein the gear component to be inspected for abnormalities in the side surface shape of the tooth portion is a helical gear. The inspection device is provided in a step of performing an operation test of the inspection object,
Determining whether or not there is an abnormality in the gear component is performed based on the vibration of the inspection object detected by the vibration detection means during the operation test,
2. The determination as to whether or not there is an abnormality in the side surface shape of the tooth portion is performed based on the rotation of the gear component within the inspection object detected by the rotation sensor during the operation test. Or the inspection device according to claim 2 . 4. The inspection apparatus according to claim 3, wherein the determination of the presence or absence of an abnormality in the gear component and the determination of the presence or absence of an abnormality in the side surface shape of the tooth portion are performed in parallel with the operation test.

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