JP7073036B2 - Gear pair lap processing machine - Google Patents

Description

The present invention relates to a lapping machine for finishing and grinding the tooth surface of a gear pair.

As a general procedure for making gears, gears are machined by a gear cutting machine (also referred to as a gear cutting machine), then heat-treated, and then polished. As the gear cutting machine, for example, those described in Japanese Patent Application Laid-Open No. 2009-190996 (Patent Document 1) are known. Patent Document 1 includes a spindle connected to a shabin cutter, a cutter head supporting the spindle, a bearing interposed between the spindle and the cutter head, and a vibration detection sensor provided on the bearing. The vibration detection sensor detects the vibration when the shaving cutter cuts the work gear. Then, the detected vibration is analyzed, and when the shaving cutter resonates, the rotation speed of the shaving cutter is adjusted so that the shaving cutter does not resonate.

Japanese Unexamined Patent Publication No. 2009-190996

By the way, in the field of automobiles equipped with a large number of gears, there is an increasing demand for quietness and improvement of fuel consumption rate in recent years. Therefore, in the gear pairs that mesh with each other, if the gear pairs are polished while meshing with each other so as to mesh more smoothly, the meshing transmission error that causes noise can be reduced, and the quietness and the fuel consumption rate are improved. On the other hand, the technique described in Patent Document 1 is for preventing resonance of the shaving cutter, and does not realize smooth meshing of the gear pair. In short, the quietness of the meshed portion between the gears cannot be realized only by finish polishing the tooth surface of each gear, but can be realized by finish polishing the paired gears in a state where they are actually meshed with each other.

Therefore, it is necessary to prepare a gear pair lapping machine for polishing the gear pair and a gear pair measuring machine for measuring whether or not the meshing of the gear pair finish-polished by the gear pair lapping machine is smooth. There is. The process in such a case is shown in FIG. First, the gear pair wrapping machine 121 is prepared, and the door of the gear pair wrapping machine 121 is opened. In step S101, the work which is a gear pair is attached to the first shaft and the second shaft of the gear pair lapping machine 121, respectively. In the next step S102, the door of the gear pair lap processing machine 121 is closed. In the next step S103, the workpieces are engaged with each other. In the next step S104, the work is lapped by meshing and rotating while supplying the work with an abrasive. In the next step S105, the work is disengaged. In the next step S106, the first axis and the second axis are rotated at high speeds to shake off the abrasive (compound) adhering to the work. In the next step S107, the door of the gear pair lap processing machine 121 is opened. In the next step S108, the work is removed from the gear pair lapping machine 121. The above-mentioned steps S101 to S108 are executed in the gear pair lapping machine 121.

In the next step S109, the work taken out from the gear pair lapping machine 121 is washed.

Next, the gear pair measuring machine 122 is prepared, and the door of the gear pair measuring machine 122 is opened. In the next step S110, the workpiece is attached to the first axis and the second axis of the gear pair measuring machine 122, respectively. In the next step S111, the door of the gear pair measuring machine 122 is closed. In the next step S112, the workpieces are engaged with each other. In the next step S113, the work is meshed and rotated to generate the meshing oscillating force. In the next step S114, the meshing vibration is measured. In the next step S115, the work is disengaged. In the next step S116, the door of the gear pair measuring machine 122 is opened. In the next step S117, the work is removed from the gear pair measuring machine 122. The above-mentioned steps S110 to S117 are executed in the gear pair measuring machine 122.

The reference example shown in FIG. 5 still has some points to be improved. That is, the doors of the gear pair wrapping machine 121 and the gear pair measuring machine 122 must be opened and closed, and the workpiece must be attached to and removed from the gear pair wrapping machine 121 and the gear pair measuring machine 122. And it takes a lot of man-hours. Further, the gear pair lap processing machine 121 and the gear pair measuring machine 122 must be prepared, which incurs equipment costs.

In view of the above circumstances, it is an object of the present invention to provide an improvement plan capable of reducing man-hours, shortening the manufacturing time, and further reducing the equipment cost.

For this purpose, the gear pair lap processing machine according to the present invention detachably supports and fixes the first shaft, which is one of the gear pairs, and the second gear, which is the other of the gear pairs. The second axis to be fixed, the first axis support portion that rotatably supports the first axis, the second axis support portion that rotatably supports the second axis, and the second axis support portion are displaced and second. A displacement mechanism that meshes the gear with the first gear, a polishing agent supply means that supplies the polishing agent to the tooth surface of the first gear and the tooth surface of the second gear while the first gear and the second gear are meshed, and the first. A drive source that drives the 1st or 2nd shaft while meshing the 1st gear and the 2nd gear to wrap the tooth surfaces of the 1st and 2nd gears containing an abrasive, and the 1st gear and the 1st gear. 2. A polishing agent removing means for removing the polishing agent from the tooth surface of the gear, and a vibration detecting means for measuring the meshing vibration generated at the meshing points of the first gear and the second gear in which the polishing agent is reduced by the polishing agent removing means. Be prepared. The vibration detecting means is a sensor attached to the first axis support portion or the second axis support portion to measure the acceleration of the attachment portion, and the sensor is the first axis support portion or the second axis support portion via the bracket. The bracket has a root that is mounted and fixed to the first shaft support or the second shaft support, and a tip that supports and fixes the sensor, and is attached to the root from the meshing point of the first gear and the second gear. The bracket tip and the sensor are designed to vibrate at a predetermined natural frequency due to the meshing vibration force, the first axis is the drive axis driven by the drive source, and the second axis is the first gear and the second gear. It is a driven shaft that is rotated to the first axis at the meshing point of the bracket, and the bracket is orthogonal to the longitudinal dimension from the root to the tip, the width dimension that is orthogonal to the longitudinal dimension and shorter than the longitudinal dimension, and the longitudinal dimension and the width dimension. It has a thickness dimension shorter than the width dimension, and is attached and fixed to the second shaft support portion so that the thickness dimension follows the radial direction of the second shaft.

According to the present invention, a common gear pair lapping machine can perform gear pair lapping and vibration measurement. Therefore, it is not necessary to replace the gear pair with the vibration measuring machine, and it is possible to save man-hours and shorten the manufacturing time. In addition, there is no need to prepare a vibration measuring device, and equipment costs can be reduced. The abrasive removing means may be, for example, equipment such as an air blow, or may be a drive source that rotationally drives the gear pair for a sufficient period of time. Further, the abrasive removing means does not need to completely remove the abrasive adhering to the gear pair, and it is sufficient to remove the abrasive to the extent that substantially no wrapping is performed.

The first shaft support portion and the second shaft support portion may be supported by the gantry. The drive source and the abrasive supply means may be supported by the gantry, the first shaft support portion, or the second shaft support portion. The vibration detection means of the present invention is a sensor that is attached to the first axis support portion or the second axis support portion and measures the acceleration of the attachment portion. According to the present invention , since the vibration of the meshing portion is detected in the vicinity of the meshing portion, the vibration can be accurately measured. The sensor is, for example, an accelerometer, a velocity sensor, or a displacement sensor. Further, the acceleration sensor may be a separate amplifier, or may be an acceleration sensor with a built-in amplifier. As another embodiment, the vibration detection means may be an optical sensor or the like installed on the gantry.

Further, according to the present invention , the meshing oscillating force and the natural frequency of the bracket can be matched or brought close to each other, and the sensitivity of the sensor is improved. Therefore, it is possible to measure even if the meshing vibration force is small. The predetermined natural frequency described above is set to substantially match the frequency of the meshing oscillating force, and the frequency of the meshing oscillating force is the number of teeth of the gear pair, the rotation speed of the first axis and the second axis, and so on. It can be calculated or empirically obtained by the moment of inertia in a state where the gear pair is attached and fixed to the first axis and the second axis.

Further, the first shaft of the present invention is a drive shaft driven by a drive source, the second shaft is a driven shaft that is rotated to the first shaft at the meshing point of the gear pair, and the bracket is from the root to the tip. It has a longitudinal dimension, a width dimension that is orthogonal to the longitudinal dimension and shorter than the longitudinal dimension, and a thickness dimension that is orthogonal to the longitudinal dimension and the width dimension and shorter than the width dimension, so that the thickness dimension follows the radial direction of the second axis. It is attached and fixed to the second shaft support. According to the present invention , the meshing oscillating force and the natural frequency of the bracket can be matched or brought close to each other, and the sensitivity of the sensor is improved. Therefore, it is possible to measure even if the meshing vibration force is small.

The gear pair is not particularly limited to a spur gear, a bevel gear, a spiral gear, or the like, but as a more preferable embodiment of the present invention, the gear pair is a hypoid gear, and the first shaft is configured to support and fix the large diameter gear of the hypoid gear. The second shaft is configured to support and secure the small diameter pinion of the hypoid gear, and the sensor is attached to the second shaft support. Comparing the large-diameter gear and the small-diameter pinion, the meshing exciting force appears more prominently in the small-diameter pinion. According to such an embodiment, the meshing oscillating force can be measured with high sensitivity in the hypoid gear.

The gear pair lapping machine of the present invention may be manually switched from lapping to vibration measurement, or may be partially or fully automatically switched. As one embodiment of the present invention, a tooth contact control means for adjusting the tooth contact between the first gear and the second gear by operating a displacement mechanism and a polishing agent removing means after wrapping at a predetermined tooth contact are operated as follows. Further, it is provided with a lap processing / vibration detection switching control means for receiving a signal from the vibration detection means. According to such an embodiment, it is possible to switch from lapping to vibration measurement partially or fully automatically. Note that after wrapping, the term includes stopping the abrasive supply means.

As described above, according to the present invention, it is not necessary to replace the gear pair from the lapping machine to the vibration measuring machine, and it is possible to save man-hours and shorten the manufacturing time. In addition, there is no need to prepare a vibration measuring device separately, and equipment costs can be reduced. Therefore, it is advantageous in terms of cost and production speed. According to the present invention, it is possible to improve the quietness of a differential gear device of an automobile and to manufacture it efficiently and inexpensively.

It is a work flow which shows the whole manufacturing procedure of the gear pair using the lapping machine of this invention. It is an overall view which shows typically the lapping machine of this invention. It is a flow which concretely shows the procedure of lapping processing and measurement using the lapping processing machine of this invention. It is a perspective view which takes out the bracket peripheral structure and shows schematically. It is a flow which shows concretely the procedure of the lap processing and measurement using the wrap processing machine and the measuring machine of the reference example. It is a work flow which shows the whole manufacturing procedure of a gear pair of a reference example.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a work flow showing the entire manufacturing procedure of a gear pair using the lapping machine of the present invention. First, in step S11, a toothless disk is clamped to a tooth cutting machine to perform tooth cutting, and then unclamped after the tooth cutting to obtain a work having teeth. In the next step S12, the work is heat-treated to cure the work. In step S13, the outer diameter and inner diameter of the hardened work are polished. In the next step S14, the workpieces are prepared with gear pairs, two pairs of workpieces are attached to the gear pair lapping machine, and the pair of workpieces are meshed for the first time, and while meshing and rotating with each other, the tooth surface wraps. Apply processing. Continue to measure the vibration at the meshing point while still attached to the same gear pair lap processing machine. If the vibration value exceeds the permissible value, the inspection fails and the process proceeds to step S15, and the work removed from the gear pair lap processing machine is discarded. On the other hand, if the vibration value is equal to or less than the allowable value in step S14 described above, the process proceeds to step S16 as an inspection pass, and the workpiece removed from the gear pair lap processing machine is assembled so as to have a correct tooth contact. The gear pair is completed in the next step S17.

FIG. 2 is an overall view schematically showing the gear pair lapping machine of the present invention (hereinafter, simply referred to as a lapping machine). The lapping machine 30 performs lapping on a gear pair composed of a first gear 131 and a second gear 132 that mesh with each other. The lapping machine 30 includes a first shaft 31, a second shaft 32, a first shaft support portion 33, a second shaft support portion 34, an abrasive supply means 35, a displacement mechanism 36, and a drive source 37. , A gantry 40 and a vibration detecting means 42. The first gear 131 is a ring gear having a large diameter, and is detachably supported and fixed to the first shaft 31 by bolts or the like. The second gear 132 is a small diameter pinion and has a shaft portion 134. The shaft portion 134 is clamped to the second shaft 32. The first gear 131 and the second gear 132 are hypoid gears.

The first shaft support portion 33 rotatably supports the first shaft 31 via a bearing (not shown). The second shaft support portion 34 rotatably supports the second shaft 32 via the bearing 38. The displacement mechanism 36 displaces the second shaft support portion 34 on the gantry 40 to engage the second gear 132 with the first gear 131 or separate the second gear 132 from the first gear 131. Further, the displacement mechanism 36 is capable of minute displacement, and the tooth contact of the first gear 131 and the second gear 132 can be adjusted to evenly wrap the tooth surfaces of both. The first axis support portion 33 and the second axis support portion 34 are arranged apart from each other in the horizontal direction.

The abrasive supply means 35 includes a main body 35b and a nozzle 35n extending from the main body 35b and directed to the meshing portion 133 of the first gear 131 and the second gear 132, and the polishing agent is applied to the meshing portion 133 from the tip of the nozzle 35n. Supply. The gantry 40 supports the first shaft support portion 33, the second shaft support portion 34, the abrasive supply means 35, and the drive source 37. Alternatively, as an embodiment (not shown), the abrasive supply means 35 and the drive source 37 may be attached to the first shaft support portion 33 or the second shaft support portion 34.

The drive source 37 is an electric motor and drives the first shaft 31. The second axis 32 is driven around by the first axis 31 and rotates in a driven manner. With the first gear 131 and the second gear 132 meshed with each other, the polishing agent supply means 35 supplies the polishing agent to the tooth surfaces of the first gear 131 and the second gear 132, while the drive source 37 supplies the first shaft 31. When driven, the tooth surfaces rub against each other at the meshing portion 133 containing the polishing agent, and the tooth surfaces of the first gear 131 and the second gear 132 are lapped. That is, the meshing portion 133 is wrapped by driving the drive source 37. In this lapping process, the tooth surfaces of the first gear 131 and the second gear 132 come into contact with each other evenly due to the minute displacement of the displacement mechanism 36. As a result, the entire tooth surface is properly wrapped.

The first gear 131 and the second gear 132 are covered with a cover 39. Therefore, the abrasive does not scatter out of the cover 39 during the lapping process. The cover 39 is an openable / closable type, and it is preferable to open the cover 39 when attaching / detaching the first gear 131 and the second gear 132 to / from each shaft.

When the lapping process is completed, the supply of the abrasive to the tooth surfaces of the first gear 131 and the second gear 132 is stopped, the meshing of the first gear 131 and the second gear 132 is disengaged, and the first shaft 31 is independently used. It is good to drive for a predetermined time. Further, the second axis 32 may also be driven independently for a predetermined time by another drive source (not shown). When each shaft is rotated at high speed, the abrasive is sieved from the tooth surfaces of the first gear 131 and the second gear 132 by centrifugal force and vibration. That is, the abrasive is removed from the first gear 131 and the second gear 132 by driving the drive source 37. The removal of the abrasive may be a substantially complete removal to the extent that the abrasive cannot be visually confirmed, or a small amount of the abrasive may be attached to the first gear 131 and the second gear 132 with the naked eye. The removal may be incomplete to the extent that it can be confirmed.

After rotating the first shaft 31 and the second shaft 32 for a sufficient time to remove the abrasive from the first gear 131 and the second gear 132, the first shaft 31 and the second shaft 32 are engaged again. The meshing vibration generated at the meshing point 133 where the polishing agent is reduced by the vibration detecting means 42 is measured.

FIG. 3 is a flow specifically showing a procedure of lapping and measurement using the lapping machine of the present invention. The flow of FIG. 3 represents step S14 of FIG. 1 described in detail. First, the cover 39 of the lapping machine 30 is opened so that the first shaft 31 and the second shaft 32 can be seen. The first gear 131 and the second gear 132, which are the workpieces in the first step S21, are attached and fixed to the first shaft 31 and the second shaft 32 of the lapping machine 30, respectively.

In the next step S22, the cover 39 of the lapping machine 30 is closed. In the next step S23, the first gear 131 and the second gear 132 are meshed with each other. In the next step S24, one is driven while the first gear 131 and the second gear 132 are meshed with each other, and the other is rotated to supply the polishing agent to the meshing portion, thereby lapping the meshing portion 133. The guideline for the end of the lapping process is, for example, the time measurement from the start of the lapping process. Alternatively, the end of the lapping process may be determined based on the measured value measured by the vibration detecting means 42.

In the next step S25, the meshing of the first gear 131 and the second gear 132 is disengaged. In the next step S26, the abrasive is shaken off from the first gear 131 and the second gear 132. In the next step S27, the first gear 131 and the second gear 132 are re-engaged, and in the next step S28, one shaft (first shaft 31) is driven and the other shaft (second shaft 32) is rotated. , The meshing vibration force is generated at the meshing portion 133. In the next step S29, the meshing vibration is measured and the measurement result is determined. In the next step S30, the first gear 131 and the second gear 132 are disengaged. The transition to steps S24 to S30 is performed manually or automatically. In the next step S31, the cover 39 of the lapping machine 30 is opened. In the next step S32, the first gear 131 and the second gear 132 are removed from the first shaft 31 and the second shaft 32, respectively.

The vibration detecting means 42 is, for example, an acceleration sensor, and converts the detected acceleration into an AC signal and outputs the detected acceleration to the control unit 51. The control unit 51 amplifies the received AC signal with an amplifier and converts it into a DC signal. As a result, the meshing vibration force can be determined by the overall value. A voltage monitor 52 is attached to the control unit 51. The voltage monitor 52 displays, for example, the voltage of a DC signal. The larger the meshing vibration force, the larger the voltage. Therefore, from the voltage value of the voltage monitor 52, it is possible to determine whether the vibration measurement result is OK (YES determination) or OK (NO determination).

That is, the control unit 51 monitors whether or not the measured value of the acceleration detected by the vibration detection means 42 exceeds the threshold value, and if it exceeds a predetermined threshold value, displays a NO result determination. On the contrary, if the threshold value is not exceeded, the OK result judgment is displayed.

The amplifier of the control unit 51 has a cutoff filter that cuts vibrations outside a predetermined range, and receives a signal from the vibration detection means 42 via the cutoff filter. As a specific example, assuming that the number of teeth of the second gear 132 that becomes a pinion is included in the range of 6 to 20, and the rotation speed of the second gear 132 at the time of vibration measurement is 800 to 2500 [rpm], the control unit. 51 cuts vibrations other than frequencies 80 to 8333 Hz. This makes it possible to eliminate noise unrelated to the meshing vibration. Alternatively, the amplifier of the control unit 51 gradually attenuates the vibrations other than the frequencies 80 to 8333 Hz instead of uniformly cutting them.

Alternatively, instead of providing the amplifier separately in the control unit 51, the vibration detection means 42 may be an acceleration sensor with a built-in amplifier. Alternatively, the control unit 51 may have an FFT mechanism instead of the amplifier, detect only a specific frequency, and output the measurement result to the voltage monitor 52. Alternatively, the vibration detecting means 42 may be a speed sensor or a displacement sensor, and the control unit 51 measures the vibration based on the sensor output signal from the vibration detecting means 42.

Further, the control unit 51 operates the displacement mechanism 36 to stop the tooth contact control means for adjusting the tooth contact between the first gear 131 and the second gear 132, and the polishing agent supply means 35 to stop the lap processing of the gear pair. It further includes a lap processing / vibration detection switching control means for operating the drive source 37 as the polishing agent removing means after the completion and then receiving the signal from the vibration detection means 42. In step S24 described above, the tooth contact control means of the control unit 51 evenly brings the tooth surface of the first gear 131 and the tooth surface of the second gear 132 into contact with each other to realize lapping. Further, the tooth contact control means of the control unit 51 brings the predetermined tooth surface of the first gear 131 into contact with the predetermined tooth surface of the second gear 132 in the above-mentioned steps S27 to S29 to bring the predetermined tooth surface into contact with the predetermined tooth surface. It enables vibration measurement at the points where they mesh with each other.

The control unit 51 outputs an operation signal based on a predetermined program to the displacement mechanism 36. The first gear 131 and the second gear 132 are made to have appropriate tooth contact during the lapping process. As a result, in the lapping work, the operator does not need to manually operate the abrasive supply means 35 and the displacement mechanism 36, and the lapping process shown in step S24 in FIG. 3 and the vibration measurement shown in step S29 are continuous. Can be done automatically.

The vibration detection means 42, which is an acceleration sensor, is cantileveredly attached to the second shaft support portion 34 via the bracket 43. FIG. 4 is a perspective view schematically showing the bracket 43. The bracket 43 is attached and fixed to the second shaft support portion 34 at the base 43r, and the vibration detection means 42 is supported and fixed at the tip 43e. Then, when the vibrating force F applied to the root 43r has a predetermined frequency, the vibration of the tip 43e becomes large. For example, assuming that the number of teeth of the second gear 132 that becomes a pinion is included in the range of 6 to 20, and the rotation speed of the second gear 132 at the time of vibration measurement is 800 to 2500 [rpm], the bracket 43 is unique. The frequency is set to be within the frequency range of 80-8333 Hz.

Therefore, the bracket 43 is designed so that the tip 43e and the vibration detection means 42 vibrate at a predetermined natural frequency due to the meshing vibration force applied to the root 43r from the meshing portion 133 (FIG. 2). Specifically, the material of the bracket 43, the length dimension L from the root 43r to the tip 43e of the bracket 43, and the cross-sectional area S are appropriately selected, and the natural frequency of the bracket 43 and the meshing point 133 (FIG. 2) are selected. It can be matched with the frequency of vibration.

As a result, even when the meshing vibration force of the meshing portion 133 is small, the vibration force is amplified and transmitted to the vibration detection means 42. Therefore, the vibration detecting means 42 can detect the meshing oscillating force. For example, as shown in FIG. 4, the bracket 43 is a strip plate having a small thickness in the vertical direction, and by arranging the bracket 43 directly above the second shaft 32, the vibration detection means 42 is vibrated in the vertical direction to generate a meshing oscillating force. It is easy to detect. The bracket 43, which is a strip, may be arranged so that the thickness dimension of the strip follows the radius of the second axis 32. Although not shown, the bracket 43 may be arranged above the second axis 32 except directly above. Alternatively, the bracket 43 may be arranged below the second axis 32, preferably directly below.

By the way, according to the present embodiment, as shown in step S14 of FIG. 1, the lapping process and the vibration measurement of the meshing portion are performed by the common lapping machine 30. Therefore, the man-hours for work are reduced, the manufacturing time is shortened, and the equipment cost is reduced.

For comparison, FIG. 6 shows a work flow of a reference example in which a lapping machine and a vibration measuring machine are prepared separately. The steps common to FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. In the reference example, after step S13, the process proceeds to the next step S141, and the gear pair is attached to the lapping machine to wrap. After processing and lapping, the gear pair is removed from the lapping machine. In the next step S142, the wrapped gear pair is attached to the vibration measuring machine to measure the vibration at the meshing portion, and after the measurement is completed, the gear pair is removed from the vibration measuring machine.

Comparing the work flow of the present embodiment shown in FIG. 1 with the work flow of the reference example shown in FIG. 6, it is understood that the present embodiment has fewer steps and saves labor.

Further, comparing the specific flow of the wrapping and vibration measurement of the present embodiment shown in FIG. 3 with the specific flow of the reference example shown in FIG. 5, the number of times of opening and closing of the cover 39 is higher in this embodiment. It is understood that the number of times the first gear 131 and the second gear 132 are attached and detached is small, which saves labor.

Although the embodiment of the present invention has been described above with reference to the drawings, the present invention is not limited to that of the illustrated embodiment. It is possible to make various modifications and modifications to the illustrated embodiment within the same range as the present invention or within the same range.

The gear pair lapping machine according to the present invention is advantageously used in the manufacture of gear pairs.

30 Wrap machine, 31 1st axis, 32 2nd axis,
33 1st axis support part, 34 2nd axis support part,
35 Abrasive supply means, 35b body, 35n nozzle,
36 displacement mechanism, 37 drive source, 38 bearing,
39 cover, 40 pedestal, 42 vibration detection means,
43 bracket, 43e bracket tip,
43r bracket base, 51 control unit, 52 voltage monitor,
131 1st gear, 132 2nd gear, 133 meshing point.

Claims (3)

A first shaft that detachably supports and fixes the first gear, which is one of the gear pairs,
A second shaft that detachably supports and fixes the second gear, which is the other side of the gear pair,
A first shaft support portion that rotatably supports the first shaft,
A second shaft support portion that rotatably supports the second shaft,
A displacement mechanism that displaces the second shaft support portion and engages the second gear with the first gear.
An abrasive supply means for supplying an abrasive to the tooth surface of the first gear and the tooth surface of the second gear while the first gear and the second gear are meshed with each other.
A drive for driving the first shaft or the second shaft while engaging the first gear and the second gear to lap the tooth surfaces of the first gear and the second gear containing the abrasive. Source and
An abrasive removing means for removing the abrasive from the tooth surfaces of the first gear and the second gear, and
A vibration detecting means for measuring the meshing vibration generated at the meshing portion of the first gear and the second gear whose abrasive is reduced by the abrasive removing means is provided.
The vibration detection means is a sensor that is attached to the first axis support portion or the second axis support portion and measures the acceleration of the attachment portion.
The sensor is attached to the first axis support portion or the second axis support portion via a bracket.
The bracket has a root attached and fixed to the first shaft support portion or the second shaft support portion and a tip for supporting and fixing the sensor, and is subjected to a meshing vibration force applied to the root from the meshing portion. So that the tip and the sensor vibrate at a predetermined natural frequency
Designed,
The first axis is a drive axis driven by the drive source.
The second axis is a driven axis that is rotated around the first axis at the meshing point.
The bracket has a longitudinal dimension from the root to the tip, a width dimension orthogonal to the longitudinal dimension and shorter than the longitudinal dimension, and a thickness dimension orthogonal to the longitudinal dimension and the width dimension and shorter than the width dimension. A gear pair lap processing machine that has and is attached and fixed to the second shaft support portion so that the thickness dimension follows the radial direction of the second shaft. The gear pair is a hypoid gear and
The first shaft is configured to support and fix the large diameter gear of the hypoid gear.
The second shaft is configured to support and fix the small diameter pinion of the hypoid gear.
The gear pair lap processing machine according to claim 1 , wherein the sensor is attached to the second shaft support portion. A tooth contact control means for adjusting the tooth contact between the first gear and the second gear by operating the displacement mechanism, and
The gear pair lap according to claim 1 or 2 , further comprising a lap processing / vibration detection switching control means for operating the abrasive removing means after the lap processing and then receiving a signal from the vibration detection means. Processing machine.

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