JP3139850B2 - Geared shaft straightening device and geared shaft manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for correcting a shaft with a gear, and a method for manufacturing a shaft with a gear.
The present invention relates to a straightening device and a manufacturing method for efficiently manufacturing a geared shaft.

[0002]

2. Description of the Related Art Conventionally, when a geared shaft is manufactured, its manufacturing process is configured as shown in FIG. Note that, in the manufacturing process shown in FIG. 8, a gear cutting process S1 for gear cutting the gear portion of the geared shaft is shown, corresponding to the characteristic portion of the present invention. When the gear cutting process is completed, in a quenching process S2, a predetermined portion of the geared shaft, for example, the outer periphery of the shaft portion, the entire gear portion, or both are simultaneously quenched.
It has a predetermined hardness. Then, in the cleaning step S3, the geared shaft is entirely cleaned, and in the shaft distortion measuring step S4, the eccentricity of the shaft portion is detected, and the shaft distortion is measured based on the eccentricity. Then, in the shaft straightening step S5,
Based on the shaft distortion measured in the above-described shaft distortion measuring step S4, distortion of the shaft portion is removed, and the amount of eccentricity of the shaft portion is set to a predetermined allowable amount or less.

[0003] After removing the shaft distortion in this way,
In the shaft polishing step S6, the outer peripheral surfaces of the shaft portions of all the geared shafts are polished so that the bearing state of the bearings when the geared shafts are mounted is favorably achieved. After the shaft polishing step S6, the geared shaft is cleaned in a cleaning step S7, and thereafter, in a gear test step S8, the pitch circle, the eccentric amount, and the hitting of the gear portion cut in the above-described gear cutting step S1. A mark or the like is detected, and based on the detection result, in a final determination step S9, the suitability of the geared shaft manufactured as described above as a product is determined.

[0004] The geared shaft determined to be suitable as a product in the final determination step S9 is, for example, packed in the subsequent shipping step. on the other hand,
If it is determined in the final determination step S9 that the pitch circle and the eccentric amount of the gear portion are equal to or larger than the permissible amount, these are uncorrectable and thus determined to be unsuitable as a product. The attached shaft will be discarded.
On the other hand, in the final judgment step S8, if it is determined that there is a dent on the tooth surface of the gear portion, the dent can be corrected. The process is executed, and the process returns to the above-described cleaning step S7, and after the cleaning is performed again, the gear test step S8 is performed again.

[0005]

If the amount of distortion of the shaft portion measured in the above-described shaft distortion measuring step S4 is larger than the correction range, it is determined that correction is impossible, and the shaft portion is provided. The geared shaft will be disposed of. However, the shaft distortion step S
The distortion amount of the shaft portion measured in 4 is equal to or less than the allowable amount, that is,
When it is determined that the straightening is unnecessary, and in the shaft straightening step S
When the distortion of the shaft portion is corrected to the allowable amount or less in 5, the outer peripheral surface of the shaft portion is uniformly polished.

Here, the geared shaft judged to be unsuitable as a product in the final judgment step S9 must be discarded. However, by then, this discarded geared shaft has, for example, the outer peripheral surface of the shaft portion already polished in the shaft polishing step S6. In particular, the time required for this shaft polishing is long. Migration and the cost of this polishing are high. For this reason, the cost of a geared shaft to be discarded is expensive, and a problem that loss caused by discarding becomes extremely high has been pointed out, and improvement has been demanded.

Further, since the measuring device for measuring the amount of distortion of the shaft portion and the gear tester for measuring the gear portion are composed of separate devices, the equipment cost is increased, and two devices are used. Must be installed separately,
A large installation space was required, and improvement was demanded.

The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the installation space required for manufacturing a shaft with gears and to reduce equipment costs. It is an object of the present invention to provide a device for correcting a shaft with a gear which can be used. Another object of the present invention is to determine the necessity of polishing the shaft in advance of the shaft polishing step, thereby making it unnecessary to use the shaft with gears that are originally determined to be discarded. An object of the present invention is to provide a method of manufacturing a shaft with gears, which can improve workability by eliminating complicated shaft polishing and can achieve reduction in manufacturing cost.

[0009]

Means for Solving the Problems To solve the above-mentioned problems and achieve the object, a device for correcting a shaft with a gear according to the present invention comprises a frame and a shaft portion mounted on the frame and having a shaft portion in the shaft with a gear. Measuring means for measuring the amount of distortion and the eccentricity of the gear portion, the overball diameter meter and the dent, attached to the frame,
Correction means for correcting the shaft portion to be substantially straight, based on the amount of distortion of the shaft portion in the measurement result of the measurement means, and the eccentricity and overshoot of the gear portion in the measurement result of the measurement means. First determining means for determining the discard of the geared shaft based on a ball diameter meter, and correction of the tooth surface of the geared shaft based on a dent of the gear portion in the measurement result of the measuring means. And a second judging means for judging no.

The method of manufacturing a shaft with a gear according to the present invention includes a gear cutting step of cutting a gear portion of the shaft with a gear into a predetermined profile, and, after the gear cutting step, a predetermined portion of the shaft with a gear. A quenching step of quenching, after this quenching step, a measuring step of detecting at least a pitch circle and a dent of the shaft portion and the tooth portion of the gear portion, and at least a pitch circle in this measuring step A gear NG judging step of judging NG of the gear portion based on the measurement result of the gear section; a shaft correction judging step of judging necessity of shaft correction based on a measurement result of the distortion amount in the measuring step; A dent determining step of determining the necessity of correcting the dent based on the measurement result of the dent in the process.

Further, in the method of manufacturing a shaft with gears according to the present invention, in the shaft correction judging step, the shaft portion judged to be correctable is corrected so that the distortion amount is substantially eliminated. It is characterized by further comprising a step.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a straightening device for a shaft with gears according to the present invention and a method for manufacturing the shaft with gears. First,
The geared shaft 10 to which the straightening device and the manufacturing method according to the embodiment are applied, as shown in FIG.
The shaft body 12 includes first and second gear portions 14 and 16 which are integrally formed on the shaft body 12 coaxially with the shaft body 12 and are arranged at predetermined intervals in the axial direction. ing.

Next, a method of manufacturing the geared shaft 10 shown in FIG. 1 will be described with reference to FIG. In the following description, the state from the gear cutting step to the final judgment step, which is the gist of the present invention, will be described. That is, as shown in FIG. 2, in step S10, the geared shaft 10 is provided with a gear cutting process on a pair of disc-shaped members (not shown) integrally formed on the outer periphery of the shaft main body 12. Respectively, the first and second gear portions 14 and 16 as shown in FIG. 1 are provided. After completion of the gear cutting process in step S,
In step S12, the first and second gear portions 14, 16 formed to strengthen the outer periphery of a portion of the shaft body 12 that is supported by a bearing (not shown).
In order to reinforce the tooth surface or both, a quenching step for quenching a necessary portion is performed.

Thereafter, in step S14, a cleaning step of cleaning the quenched geared shaft 10 entirely is performed. That is, in the washing step, chips and oil adhering to the geared shaft 10 are removed, and the geared shaft 10 thus washed is applied to the shaft straightening device 18 having a so-called gear test function, which will be described in detail later. It is attached. In the shaft straightening device 18, as shown as step S16, the first and second gear portions 14,
A measurement process is performed in which the state of formation of the shaft 16 is measured (detected) and the straightness of the shaft body 12 (that is, the amount of strain) is measured. Information indicating the gear formation state measured in this measurement step (specifically, information on the amount of deviation of each of the master gears 20a and 20b, rotation angle information on each of the master gears 20a and 20b, and dents) information)
The information on the amount of distortion of the shaft main body 12 is transmitted to a control unit 22 described later, where the information is processed.

Specifically, the first and second gear portions 14,
The respective gear portions 2 are calculated based on the respective overball diameters by calculating the respective 16 overball diameters.
0a and 20b are calculated, and the first and second circles from the rotation supporting axis (main shaft) of the geared shaft 10 are calculated.
The amount of distortion of the shaft main body 12 is calculated based on the amount of eccentricity of each of the gear portions 14 and 16, and the amount of scratches (dents) on the tooth surfaces of the first and second gear portions 14 and 16 is calculated. The occurrence state is measured.

On the other hand, after the measurement process is performed, in step S18, the gear unit 1 measured in the measurement process is used.
A gear quality determination step of determining the quality of each of the formation states 4 and 16 is performed. In this gear quality determination step, it is determined whether or not the measured overball diameter and pitch circle of each of the first and second gear portions 14 and 16 are each greater than or equal to an allowable amount. That is, in this gear quality determination step, if at least one of the overball diameter and the pitch circle of each of the gear portions 14 and 16 is equal to or larger than the allowable amount, it is determined to be no (NG), and both are smaller than the allowable amount. In such a case, the setting is made so as to be judged as good (OK). Here, if it is determined that the gear is not good (NG) in the gear quality determination process, the gears 14 and 16 are removed from the shaft straightening device 18 and discarded in step S20.

On the other hand, in the gear quality judgment step,
If K) is determined, in a succeeding step S22, a shaft correction determining step of determining whether it is necessary to correct the distortion amount of the shaft main body 12 is executed. That is, in the shaft straightening determination step, based on the amount of distortion in the above-described measurement result, as shown in FIG. 3, even if the straightening is not performed, in other words, a predetermined allowable range (i.e. The correction-unnecessary range) A, the correction-possible range B brought to a predetermined allowable range by the correction, or the uncorrectable range C which is not brought to the predetermined allowable range even if the correction is made. It is determined whether there is.

In the shaft straightening determination step, when it is determined that the distortion amount measured in the above-described measuring step is within the uncorrectable range C, the geared shaft 10
Is removed from the shaft straightening device 18 and discarded in step S20 described above. If it is determined that the above-mentioned amount of distortion is within the correctable range B, the process proceeds to step S24, where the geared shaft 10 is attached to the shaft correcting device shaft 18 in one direction. By pressing the shaft body 12 from above, the correcting operation of the shaft body 12 is executed. On the other hand, in this shaft straightening judgment process,
If it is determined that the above-described distortion amount is in the correction unnecessary range A, the process proceeds to step S26, where the first and second corrections are performed.
A dent determining step of determining the state of dent formation on each tooth surface of the gear portions 14 and 16 is performed.

Here, after performing the distortion correcting step in step S24, the process returns to step S16 described above, the second measuring step is performed, and the measuring operation of the geared shaft 10 after the correcting operation is performed. . Note that the first measurement result described above is updated by the measurement result obtained by the second measurement operation. In other words,
It is always updated with the latest measurement results. Then, in a succeeding step S18, a second gear quality determination process is performed. In the second measurement process, the geared shaft that has already been determined to be unacceptable (NG) based on the measurement result in the first measurement process. 10 has been discarded in step S20, and in this second gear quality determination step, basically, a good (O
K).

Then, in a succeeding step S22, a second shaft straightening determination step is performed. If it is determined in the second shaft correction determination step that the distortion amount of the shaft main body 12 measured in the second measurement step is within the correction unnecessary range A, the above-described step S2 is performed.
Proceeding to 6, a dent determination step is performed. On the other hand, when it is determined that the amount of distortion is in the uncorrectable range C,
The geared shaft 10 is removed from the shaft straightening device 18 and is discarded in step S20 described above. When it is determined that the above-mentioned amount of distortion is within the correctionable range B again, an alarm (not shown) is activated to perform a changing operation for changing the mounting angle position of the geared shaft 10 by 180 degrees by the operator. Prompt.

In this way, when the operator changes the mounting angle position of the geared shaft 10 by 180 degrees in step S24, a second distortion correction step is performed in step S24. After the execution of the second straightening process, the process returns to step S16, the third measuring process is performed again, and the measuring operation of the geared shaft 10 after the second correcting operation is performed. Then, in a succeeding step S18, a third gear quality determination process is performed, and basically, it is determined to be good (OK), as in the second case described above.

Then, in a succeeding step S22, a third shaft straightening determination step is performed. In the third shaft straightening determination step, if it is determined that the shaft is in the unnecessary range A, the process proceeds to step S26 described above,
A dent determination step is performed. On the other hand, if it is determined in the third shaft correction determination step that the shaft is in the uncorrectable range C, the geared shaft 10 is removed from the shaft correction device 18 and the above-described step S is performed.
At 20, it will be discarded. Further, when it is determined that the above-mentioned amount of distortion is within the correctionable range B again, even if the mounting state is changed by 180 degrees as described above, the distortion does not converge to the correction unnecessary range A. As shown in FIG. 4, it is determined that the state of occurrence of distortion is a state that can be represented by a curve having two inflection points. Here, if it is determined that the state of occurrence of distortion is a state that can be represented by a curve having two inflection points, even if the correction operation is repeated many times, the pressing operation from only one direction is performed. Therefore, since it is impossible to correct the distortion, the geared shaft 10 is removed from the shaft correcting device 18 and discarded in the above-described step S20.

That is, in this embodiment, when it is determined that the amount of distortion of the shaft main body 12 is within the correction unnecessary range A in the shaft straightening determination step in step S22, the dent determining step in step S26 is performed for the first time. Then, it is determined whether there is a dent on the tooth surface of each of the first and second gear portions 14 and 16. If it is determined in this step S26 that there is a dent,
The geared shaft 10 is detached from the shaft straightening device 18, and in step S28, a dent correction process is performed by, for example, a file or the like by a manual operation of an operator, and the shaft 10 is mounted on the shaft straightening device 18 again. By executing the step S16 and subsequent steps, it is checked whether or not the dent is substantially removed by the dent correction process.

If it is determined in step S26 that no dent is present or that dent correction has been performed to such an extent that it has been substantially removed, the geared shaft 10 Shaft straightening device 1
8 and attached to a shaft polishing device (not shown).
Is polished. Specifically, a polishing step of polishing an outer peripheral surface of a portion where a bearing (not shown) is attached is specifically performed. After the shaft grinding step in step S30 is completed, the geared shaft 10 is removed from the shaft straightening device, and the flow proceeds to step S3.
In 2, it is attached to a cleaning device (not shown) to perform a cleaning process.

After completion of the cleaning step in step S32, the geared shaft 10 is mounted on a gear tester (not shown), where the final measuring step in step S34 is performed, and the same as the measuring step in step S16 described above. , The first and second gear portions 14,
The state of formation of the shaft 16 is measured (detected), and at the same time, the straightness (that is, the amount of distortion) of the shaft main body 12 is measured. Information indicating the gear formation state measured in the final measurement step in step S34, specifically, the first and second gears.
The deviation amount information of the master gear meshing with the gear portions 14 and 16, the rotation angle information of each master gear, the dent information, and the distortion amount information of the shaft body 12 are as follows.
The information is transmitted to the control unit 22 described above, where the information is processed.

On the other hand, after this measuring step is performed, in step S36, the state of formation of each of the gear portions 14, 16 and the state of occurrence of the amount of distortion of the shaft main body 12 measured in the final measuring step in step S36. A final determination step for finally determining whether or not is possible is performed. If it is determined in the final determination step that any of the determination items is unacceptable (NG), the geared shaft 10 is removed without performing any correction or correction processing on the determined item.
Is removed from the gear tester and discarded in step S20. Also, in the final judgment step in step S36, all judgment items are acceptable (OK).
Is determined, the geared shaft 10 is
It is ready to be shipped as a final product. After being removed from the gear tester, it is carried to the next step, for example, where a packing step is performed.

As described in detail above, in the manufacturing method of this embodiment, before performing the shaft polishing step in step S30, the gear correction judgment step in step S18 and the shaft straightening determination step S22 in the cover 22 are discarded. It is configured to determine whether or not the formed state of the geared shaft 10 has been formed. In other words, if it is determined in this gear quality determination step S18 that the pitch circles of the first and second gear portions 14 and 16 and the overball diameter are not within the range suitable for the product, or the shaft correction is determined. If it is determined in step S22 that the distortion amount of the shaft main body 12 is in the uncorrectable range C, or if the second straightening process is performed in a state where the pressing direction is changed in the shaft straightening determination process S22, When it is determined that the amount of distortion is within the correctable range B, all the settings are made so that the discard processing is performed in step S20 without performing dent determination or shaft polishing. In other words, the formation state of the first and second gear portions 14 and 16 is determined to be good in the gear quality determination step S18, and the distortion amount of the shaft main body 12 does not need to be corrected in the shaft correction determination step S22. Only when it is determined that it is within the range A, it is set so as to receive the dent determination in step S26, perform the dent correction processing as needed in step 28, and then perform the shaft polishing processing in step S30. ing.

As described above, the shaft polishing process in step S30 is performed in advance by the first and second gear portions 14 and 16.
Is determined as a product, the distortion of the shaft main body 10 is corrected in advance, and the dents on the tooth surfaces of the first and second gear portions 14 and 16 are corrected in advance. It is set to be implemented only for the target. Therefore, basically, only the geared shaft 10 to be polished is previously determined to be suitable as a product, and a gear test is performed after the shaft is polished. In comparison with the conventional method, the frequency of occurrence of having to discard the shaft-polished geared shaft 10 can be effectively suppressed, and waste of shaft polishing can be prevented as much as possible. .

In particular, in this embodiment, after the cleaning step in step S32, that is, in step S30
After the shaft polishing step in the above, a final judgment step of judging whether or not it is suitable as a product is set to be performed in step S36, and this final judgment step S3
The geared shaft 10 that is finally determined to be unacceptable as a product in step 6 will be discarded. In other words, the possibility of discarding is determined by discarding the geared shaft 10 whose shaft has been polished in advance. The occurrence frequency is suppressed as much as possible, and the execution of the shaft polishing step is not wasted as much as possible, so that the workability is improved and the production cost can be reduced.

Conventionally, the distortion amount measurement for correcting the shaft and the gear test for the final judgment are configured to be performed separately. However, the measurement of the eccentricity for measuring the distortion amount has been described. The measurement of the amount of eccentricity of each gear portion in the gear test is a value obtained by executing substantially the same measuring operation. That is, conventionally, the same eccentricity measurement was repeatedly performed twice. However, in this embodiment, by setting the measurement step S16 to be performed before the shaft straightening step S24, the amount of eccentricity may be measured only in the measurement step S16, thereby shortening the tact time. And workability can be improved.

Further, since the determination of the quality of the formation of the first and second gear portions 14 and 16 and the determination of the correction of the amount of distortion of the shaft main body 12 are performed using the same measurement result, The management of the measurement data is simplified, and the accuracy can be improved. Also, as described above, step S
Shaft body 12 straightened in the straightening process in 24
Can be re-measured in the measurement step of step S16 as it is, so that the reliability of the correcting operation can be improved.

It goes without saying that the manufacturing method according to the present invention is not limited to the above-described procedure, but can be variously modified without departing from the gist of the present invention. For example, in the above-described embodiment, in the steps S34 and S36, the final measurement step and the final determination step are described as being sequentially performed. However, the present invention is not limited to such a procedure. Even if the final measurement step and the final determination step are omitted without being performed, the state of occurrence of the amount of distortion of the shaft main body 12 and the first and second gear portions 14 and 1 have already been performed in steps S16 to S26.
6 Nogi and the state of formation are measured and the quality is judged, so that there is practically no problem. However, by performing steps S24 and S36 in this way, unexpected defects that occur during the execution of the shaft polishing step and the cleaning step in steps S30 and S32, for example, the geared shaft 10, The occurrence of a new distortion in the shaft body 10 due to the drop and the occurrence of a new dent due to the drop of the tool on the tooth surface of the first or second gear portion 14 or 16 are surely found. The geared shaft 10 having these defects can be effectively excluded.

Further, in the above-described embodiment, the final judgment step in step S36 is not possible (NG).
Although it has been described that the shaft with gear 10 determined to be discarded is discarded, it goes without saying that the shaft with gear 10 may be configured to be subjected to a correction process or a correction process again.

In the above-described embodiment, the geared shaft 10 is provided with the first and second gear portions 14 and 16.
However, the geared shaft applied to the present invention is not limited to such a configuration, and may be applied to a configuration having one gear portion. In short, it goes without saying that the present invention can be applied to a geared shaft having an arbitrary number of gear portions.

Next, the configuration of the shaft straightening device 18 that executes the procedure from the above-described measuring step S16 to the dent determining step S26 collectively will be schematically described. In this embodiment, the shaft straightening device 18 has a function of measuring the strain of the shaft main body 12 of the geared shaft 10, correcting the strain, and judging the formation state of the gears 14 and 16. It has a gear test function for performing the operation.

That is, as shown in FIGS. 5 and 6, the shaft straightening device 18 having the gear test function has a frame 24 mounted on a base (not shown).
On both sides of the frame 24, a shaft supporting mechanism 26 for supporting the geared shaft 10 rotatably around the main shaft.
a, 26b are attached. As shown in FIG. 5, the frame 24 has a shaft support mechanism 26a,
A gear test mechanism 28 for measuring the state of formation of the first and second gear portions 14 and 16 of the geared shaft 10 rotatably supported by 26b and the amount of distortion of the shaft body 12 (gear test) is provided. Also, as shown in FIG. 6, based on the detection (measurement) result of the gear test mechanism 28, the geared shaft 1 supported by the shaft support mechanism.
And a shaft straightening mechanism 30 for pressing a predetermined portion of the shaft body 12 from one direction to remove the distortion and straighten the shaft body 12 to a substantially straight state.

Here, the gear test mechanism 28 corresponds to FIG.
As shown in the figure, master gears 20a and 20b meshing with the first and second gear portions 14 and 16, respectively, and these master gears 20a and 20b are respectively rotatable around the above-mentioned rotation axis parallel to the main shaft. And master gear support mechanisms 32a and 32b for supporting the first and second gear portions 14 and 16 so as to be able to advance and retreat, respectively, and the first and second corresponding master gears 20a and 20b. Gear part 1
The first and second springs 34a and 34b, which urge in the directions meshing with the gears 4 and 16, respectively, and the amount of displacement of the master gears 20a and 20b from the reference position in the master gear support mechanisms 32a and 32b, respectively. First and second detectors (displacement sensors) 36a and 36b, a driven gear 38 fixed coaxially with the first master gear 20a, and a driving gear 40 meshing with the driven gear 38 are fixed to a motor shaft 42a. , A drive motor 42 for rotating and driving the first master gear 20a, and the first and second master gears 20a.
The first and second rotation sensors 44a and 44b for detecting the respective rotation angle positions of the rotation sensors a and 20b are roughly provided.

As shown in FIG. 6, the shaft correcting mechanism 30 is mounted on a lower portion of the frame 24, and supports a pair of support bases 46a, 46b for supporting both ends of the shaft main body 12 of the geared shaft 10 from below. 46b, and a press section 48 for pressing a predetermined portion of the shaft main body 12 from above to eliminate distortion of the shaft main body 12 based on a calculation result described later. Here, both support bases 4
6a and 46b are the shaft bodies 12 when the measurement operation is being performed in the gear test mechanism 28 described above.
From below. In addition, with the shaft correcting operation, both support bases 46a and 46b are lifted upward, and the shaft support mechanisms 26a and 26b are released from the rotation support state of the shaft main body 12, and the shaft main body 1
2 has its both ends independently supported by support tables 46a and 46b. Further, the press mechanism 48 is supported so as to be movable in parallel with the main shaft described above, and is moved by a moving mechanism (not shown) directly above an arbitrary position along the main shaft direction of the shaft main body 12 based on a calculation result described later. It has been done. Further, the press mechanism 48 is configured so that the shaft main body 12 can be pushed down by an arbitrary press force.

On the other hand, the gear test mechanism 28 is connected to the control unit 22 described above, transmits detection information to the control unit 22, and receives the information processing described above. That is, the control unit 22
As shown in FIG. 7, information indicating the gear formation state of each of the first and second gear portions 14 and 16 transmitted from the gear test mechanism 28 (specifically, the first and second displacement sensors 36a, 36b, the displacement information of each of the first and second master gears 20a, 20b, and the output of the first and second rotation sensors 44a, 44b. First and second master gears 20a, 2
0b) is amplified through an amplifier 50 and transmitted to a gear test control unit 52 and a shaft correction control unit 54.

In the gear test control section 52, based on the detection information transmitted thereto, information indicating the gear formation state of the first and second gear sections 14 and 16, ie, the first and second gear sections. The gear information calculating section 52A for calculating the overball diameter of each of the second gear sections 14 and 16 and the pitch circle thereof, and the tooth surface state detecting section 52B for detecting the state of occurrence of a flaw (dent) on each tooth surface. And The gear test control unit 52 includes a reference gear information setting unit 52C for setting a reference pitch circle value and an overball diameter value, and a reference tooth surface state setting for setting a reference tooth surface state. A part 52D is further provided. Here, the reference pitch circle and the reference overball diameter set by the reference gear information setting unit 52C and the actual (that is, measured) pitch circle and the overball diameter calculated by the gear information calculation unit 52A are as follows. Gear quality judgment unit 5
2E, the measured pitch circle and overball diameter are determined so as to determine whether or not the geared shaft 10 is suitable for shipping as a product. The judgment information in the gear quality judgment section 52E is processed by a gear quality signal processing section 52F, and a signal from the gear quality signal processing section 52F is output to the display section 56 via an output section 52G. Have been. That is,
The display unit 56 displays the result of the determination as to whether or not the first and second gear units 14 and 16 are suitable as a product in the above-described gear quality determination unit 52F, and is unsuitable as a product (NG). Is set so that the result of the calculation is displayed when it is determined that.

On the other hand, in the gear test control unit 52, the reference tooth surface state set by the reference tooth surface state setting unit 52D and the actual (i.e., calculated by the tooth surface state detection unit 52B)
The measured tooth surface condition is compared with a dent correction determination unit 52H, and the dent correction determination unit 52H determines whether or not there is a dent to be corrected in the measured tooth surface condition.
If it exists, its location is configured to be determined somewhere. The dent correction determining unit 52H is connected to the above-described display unit 56, and the determination information is signal-processed by a dent correction signal processing unit 52I, and a signal from the dent correction signal processing unit 52I is output. It is configured to be output to the above-described display unit 56 via the unit 52J.
That is, in the display unit 56, the above-described dent correction determination unit 5
In addition to the result of the determination regarding the presence or absence of a dent to be corrected in 2H, if it is determined that there is a dent to be corrected, the calculation result (that is, the size and position of the dent) is displayed. Is set to

On the other hand, the shaft straightening control unit 54
Is the displacement amount from the main shaft of the shaft body 12, the axial position where the maximum displacement occurs, and the angular position around the central axis where the maximum displacement occurs, based on the detection information transmitted thereto. And a correction number counting section 54B for counting the number of times the shaft correction operation has been performed (ie, a correction number counting section 54B for counting the number of corrections). The shaft correction control section 54 includes the shaft correction control section 54. Shaft main body 1 obtained from the calculation result of calculation unit 54A
Further, there is further provided a shaft straightening determination unit 54C for determining the necessity of the straightening operation of the shaft main body 12 based on the distortion amount of No. 2 and the number of straightenings counted by the straightening number counter 54B. The shaft straightening determination unit 54C is connected to the display unit 56 described above, and the determination information is signal-processed by a shaft straightening signal processing unit 54D. A signal from the shaft straightening signal processing unit 54D is output to an output unit 54E. It is configured to be output to the above-described display unit 56 via the display unit 56. That is, the display unit 56 displays the result of the determination on the necessity of the correction operation on the shaft body 12 in the shaft correction determination unit 54C described above, and when it is determined that there is a distortion to be corrected, The calculation result (that is, the correction position, the correction direction, and the pressing force required for the correction) is set to be displayed. The calculation result is transmitted to the above-described shaft straightening mechanism, and is set so as to be used as basic data of the shaft straightening operation here.

The shaft straightening device 18 thus configured
In the above-mentioned measurement step S16 to dent determination step S
26 are executed. The method for manufacturing a shaft with gears according to the present invention is not limited to being applied to the shaft straightening device 18 having the above-described configuration, and includes the steps from the measurement step S16 to the dent determination step S26 described above. It goes without saying that the present invention can be applied to any configuration.

[0044]

As described above in detail, the apparatus for correcting a shaft with a gear according to the present invention is mounted on a frame, and the amount of distortion of the shaft portion, the amount of eccentricity of the gear portion, and A ball-diameter and a measuring means for measuring a dent, and a straightening device which is attached to the frame and which straightens the shaft portion based on a distortion amount of the shaft portion in a measurement result of the measuring device. Means, first determining means for determining discard of the geared shaft based on the amount of eccentricity of the gear portion in the measurement result of the measuring means and the overball diameter, and The present invention is characterized in that it is provided with a second judging means for judging whether or not it is necessary to modify the tooth surface of the geared shaft based on the dent of the gear portion.

The method of manufacturing a shaft with a gear according to the present invention includes a gear cutting step of cutting a gear portion of the shaft with a gear into a predetermined profile, and, after the gear cutting step, a predetermined portion of the shaft with a gear. A quenching step of quenching, after this quenching step, a measuring step of detecting at least a pitch circle and a dent of the shaft portion and the tooth portion of the gear portion, and at least a pitch circle in this measuring step A gear NG judging step of judging NG of the gear portion based on the measurement result of the gear section; a shaft correction judging step of judging necessity of shaft correction based on a measurement result of the distortion amount in the measuring step; A dent determining step of determining the necessity of correcting the dent based on the measurement result of the dent in the process.

Further, in the method of manufacturing a shaft with gears according to the present invention, in the shaft straightening determining step, the straightening portion which is determined to be straightening is straightened so that the amount of strain is substantially eliminated. It is characterized by further comprising a step.

Therefore, according to the present invention, there is provided an apparatus for correcting a shaft with a gear which can reduce the installation space required for manufacturing the shaft with a gear and reduce the equipment cost. become. Also,
According to the present invention, at the stage before the shaft polishing step, by determining in advance the necessity of polishing the shaft, unnecessary shaft polishing for the geared shaft which is originally determined to be discarded can be performed. Thus, a method of manufacturing a shaft with gears that can improve workability and reduce manufacturing cost can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a geared shaft to which an embodiment of a manufacturing method according to the present invention is applied and which is corrected by a straightening device according to the present invention.

FIG. 2 is a flowchart showing a procedure of one embodiment of a method of manufacturing a shaft with gears according to the present invention.

FIG. 3 is a diagram showing a relationship between a pitch circle value used in a polishing determination step and an allowable range.

FIG. 4 is a view schematically showing a state in which distortion of a shaft body of an uncorrectable shaft with a gear is generated.

FIG. 5 is a plan view schematically showing the configuration of a shaft straightening device according to the present invention, to which the method for manufacturing a shaft with gears is applied.

6 is an elevational view schematically showing a configuration of the shaft straightening device shown in FIG.

FIG. 7 is a block diagram showing a configuration of a control unit connected to the shaft straightening device.

FIG. 8 is a flowchart showing one embodiment of a conventional method of manufacturing a geared shaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Geared shaft 12 Shaft main body 14 1st gear part 16 2nd gear part 18 Shaft correction apparatus 20a; 20b Master gear 22 Control unit 24 Frame 26a; 26b Shaft support mechanism 28 Gear test mechanism 30 Shaft correction mechanism 32a; 32b Master 34b; spring 36a; 36b displacement sensor 38 driven gear 40 drive gear 42 drive motor 42a motor shaft 44a; 44b rotation sensor 46a; 46b support base 48 press section 50 amplifier 52 gear test control section 52A gear information calculation section 52B teeth Surface condition detecting unit 52C Reference gear information setting unit 52D Reference tooth surface condition setting unit 52E Gear good / bad judgment unit 52F Gear good / bad signal processing unit 52G Output unit 52H Dent correction correction judgment unit 52I Dent correction signal processing unit 52J Output unit 54 Shaft correction control unit 54A Shaft correction calculation unit 54B Correction number counting unit 54C Shaft correction determination unit 54D Shaft correction signal processing unit 54E Output unit 56 is a display unit.

Claims (13)

(57) [Claims] 1. A frame, attached to the frame, measuring means for measuring the amount of distortion of the shaft portion and the amount of eccentricity of the gear portion, the overball diameter meter, and the dent of the geared shaft; Correction means for correcting the shaft portion to be substantially straight based on the amount of distortion of the shaft portion in the measurement result of the measurement means; and the eccentricity and overshoot of the gear portion in the measurement result of the measurement means. First determining means for determining the discard of the geared shaft based on a ball diameter meter, and based on a dent of the gear portion in the measurement result of the measuring means,
A shaft determining device for determining whether or not the tooth surface of the geared shaft needs to be corrected. 2. A measuring device comprising: a master gear provided so as to be meshable with a gear portion of a shaft with a gear and capable of moving forward and backward with respect to the gear portion; and a master gear being meshed with the gear portion. A drive means for rotating the master gear, and a displacement sensor for measuring an amount of advance and retreat of the master gear rotated and driven by the drive means with respect to the gear portion. The shaft straightening device according to claim 1. 3. The shaft straightening device according to claim 2, wherein the master gears are provided in correspondence with the number of gears provided on the shaft with gears. 4. The shaft straightening apparatus according to claim 3, wherein said driving means rotationally drives one of the plurality of master gears. 5. A gear cutting step for gear-cutting a gear portion of a geared shaft into a predetermined profile; after the gear cutting step, a quenching step for quenching a predetermined portion of the geared shaft; Thereafter, a measuring step of detecting the amount of distortion of the shaft portion and at least the pitch circle and the dent of the gear portion that has been cut off, and determining the NG of the gear portion based on at least the measurement result of the pitch circle in the measuring step. A gear NG determination step for determining; a shaft correction determination step for determining the necessity of shaft correction based on the measurement result of the distortion amount in the measurement step; A method for determining the necessity of correcting a mark. 6. The method according to claim 5, wherein the geared shaft having the gear portion determined as NG in the gear NG determination step is discarded. 7. The method according to claim 5, wherein the geared shaft having the shaft portion determined to be uncorrectable in the shaft straightening determination step is discarded. 8. The apparatus according to claim 1, further comprising a distortion correcting step of correcting the shaft portion determined to be correctable in the shaft correction determining step so that the distortion amount is substantially eliminated. 6. The method for producing a shaft with gears according to 5. 9. The method according to claim 8, wherein the measuring step is performed again after the distortion correcting step is performed. 10. The method for manufacturing a shaft with a gear according to claim 5, wherein the tooth surface of the gear portion determined to have a dent in the dent determination step is subjected to a correction process. . 11. The shaft correction determining step is performed after the gear NG determining step.
3. The method for manufacturing a shaft with gears according to item 1. 12. The method according to claim 5, wherein the dent determination step is performed after the shaft correction determination step. 13. The apparatus according to claim 5, wherein the measuring step, the measuring step, the gear NG determining step, the shaft correcting determining step, and the dent determining step are performed by the same correcting device. 3. The method for manufacturing a shaft with gears according to item 1.