JP5293966B2 - Gear shaving method and processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove fluctuation in force for pushing a cutting edge of a shaving cutter against a gear to be ground to the extent possible in shaving the gear with a small contact gear ratio. <P>SOLUTION: A mating gear 14 is engaged with the shaving cutter 10 to attain a half-phase shift from an engagement phase between the shaving cutter 10 and the gear 12 to be ground to shave the gear 12, whereby the driving torque of the shaving cutter 10 is dispersed to the gear 12 and the mating gear 14. For example, when the number of engaging points between the shaving cutter 10 and the gear 12 is 2, the number of engaging points between the shaving cutter 10 and the mating gear 14 is 1. When the number of the engaging points between the shaving cutter 10 and the gear 12 is 1, the number of the engaging points between the shaving cutter 10 and the mating gear 14 is 2. Thus, a total of the engaging points is constantly 3. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a gear shaving processing method and a processing apparatus.

  Conventionally, a shaving process is performed as necessary in the final finishing stage of gear production. As shown in FIG. 2, the shaving process is performed by intersecting the rotating shaft 10C of the shaving cutter 10 and the rotating shaft 12C of the work gear 12 with no backlash and engaging the shaving cutter 10 and the work piece. By reducing the center distance from the gear 12, the cut gear 12 is cut and the tooth surface of the cut gear 12 is finished (for example, see Patent Documents 1 and 2). 2A shows a state of shaving when the work gear 12 is a spur gear, and FIG. 2B shows a state of shaving when the work gear 12 is a helical gear. ing.

JP-A-62-2228320 JP 2003-251526 A

By the way, when the work gear is a spur gear or a helical gear with a small helix angle, the overlap meshing ratio (meshing ratio in the tooth trace direction) cannot be taken, so the variation in meshing between the shaving cutter and the work gear is It depends only on the meshing rate (meshing rate in the tooth profile direction).
When the shaving process is performed on a gear having a small meshing rate, and the front meshing rate between the shaving cutter and the gear to be cut is 2.0 or less, the state of one tooth and 2 in meshing the two Since the state of the teeth appears, the force for pressing the cutting blade of the shaving cutter 10 against the work gear 12 also varies. Specifically, the pressing force of the cutting blade near the center of the tooth profile that is in the one-tooth meshing state is large, and the pressing force of the cutting blade near the tooth root and the tooth tip of the tooth profile that is in the two-tooth meshing state is small. As a result, the tooth shape near the center of the tooth profile becomes a tooth shape that is deeply cut and recessed as compared with the tooth root and the tooth tip, and the tooth surface accuracy deteriorates.

  The present invention has been made in order to solve the above-described problems, and the object of the present invention is to change the force with which the cutting blade of the shaving cutter is pressed against the work gear during shaving processing of a gear with a low meshing rate. It is to remove as much as possible to avoid deterioration of the tooth surface accuracy of the work gear.

In order to solve the above-described problems, the gear shaving processing method according to the present invention provides a shaving cutter with an opposed gear in which the work gear and the rotary shaft system are separately independent, and the driving torque of the shaving cutter is the work gear and the opposed gear. The variation of the pressing force of the cutting blade of the shaving cutter against the workpiece gear is reduced by performing the shaving process in such a manner as to be dispersed in the manner described above.
Further, the gear shaving machining apparatus of the present invention is an aspect in which the gear to be cut and the rotating shaft system are separate and independent from the shaving cutter, and the driving torque of the shaving cutter is distributed to the gear to be cut and the counter gear. By being engaged with each other, the fluctuation in the pressing force of the cutting blade of the shaving cutter against the work gear is reduced during the shaving process.
(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further while referring to the best mode for carrying out the invention. Those to which the above components are added can also be included in the technical scope of the present invention.

  (1) A method for shaving a gear having a low meshing rate, wherein the opposing gear is meshed with the shaving cutter so as to be shifted by a half phase with respect to the meshing phase between the shaving cutter and the work gear, and the shaving is performed. A gear shaving method for shaving a workpiece gear by rotating a cutter (claim 1).

In the gear shaving processing method described in this section, the opposing gear is engaged with the shaving cutter so as to be in a state shifted by a half phase with respect to the meshing phase between the shaving cutter and the work gear, and the work gear is shaved. By doing so, the driving torque of the shaving cutter is distributed between the work gear and the counter gear. Specifically, when the number of meshing points between the shaving cutter and the work gear is 2, the number of meshing points between the shaving cutter and the counter gear is 1, and the number of meshing points between the shaving cutter and the work gear is When the number is 1, the total number of meshing points of the work gear and the counter gear with respect to the shaving cutter is constant because the number of meshing points of the shaving cutter and the counter gear is two. This eliminates fluctuations in the pressing force of the cutting blade of the shaving cutter against the work gear.
In addition, due to the structure of the gear, by appropriately adjusting the positions of the work gear and the counter gear with respect to the shaving cutter (the relative positions of the work gear and the counter gear with respect to the rotation shaft of the shaving cutter), inevitably, The opposing gear meshes with the shaving cutter so that the phase is shifted by a half phase with respect to the meshing phase between the shaving cutter and the work gear (the same applies hereinafter).

  (2) A method for shaving a gear with a small meshing rate, wherein an opposing gear having a large meshing rate with respect to the meshing rate between the shaving cutter and the work gear is meshed with the shaving cutter, and the shaving cutter is rotated. A gear shaving method for driving and shaving a work gear (claim 2).

  The gear shaving processing method described in this section is configured to engage an opposing gear having a large meshing ratio with respect to the meshing ratio between the shaving cutter and the work gear with the shaving cutter and rotationally drive the shaving cutter to cut the work. By performing the shaving process of the gear, the driving torque of the shaving cutter is distributed between the work gear and the counter gear. Specifically, when the number of meshing points between the shaving cutter and the work gear is changed to 1, 2, 1, 2,..., The number of meshing points between the shaving cutter and the counter gear is, for example, 6, 5, By changing to 6, 5, the total number of meshing points of the work gear and the counter gear with respect to the shaving cutter becomes constant (the variation ratio of the meshing score is small). For this reason, fluctuations in the pressing force of the cutting blade of the shaving cutter against the work gear are eliminated (smaller).

(3) In the above (2), a method for shaving a gear that meshes an opposing gear with the shaving cutter so that the phase is shifted with respect to the meshing phase between the shaving cutter and the work gear ( Claim 3).
The gear shaving processing method described in this section performs the shaving processing of the work gear by meshing the opposing gear with the shaving cutter so that the phase is shifted with respect to the meshing phase between the shaving cutter and the work gear. Thus, the function and effect of the item (1) are obtained together with the function and effect of the item (2).

(4) A gear shaving method according to (1) to (3) above, wherein the rotating shaft of the shaving cutter and the rotating shaft of the counter gear are arranged in parallel (claim 4).
In the gear shaving processing method described in this section, the rotating shaft of the shaving cutter and the rotating shaft of the counter gear are arranged in parallel and meshed with each other, so that the effects of the above items (1) to (3) are achieved. To get.

(5) A gear shaving method according to (1) to (4) above, wherein a front meshing ratio between the shaving cutter and the work gear is 2.0 or less.
The gear shaving method described in this section provides the effects of the above items (1) to (4) when the front meshing ratio between the shaving cutter and the work gear is 2.0 or less.

(6) The gear shaving method according to (1) to (5) above, wherein the relative position of the rotation shaft between the shaving cutter and the counter gear is adjusted according to the gear to be cut (Claim 6).
The gear shaving processing method described in this section includes adjusting the relative position of the rotation shafts of the shaving cutter and the counter gear according to the work gear, thereby providing a shaving cutter for the meshing phase between the shaving cutter and the work gear. The meshing phase of the counter gear is appropriately adjusted, and if necessary, the counter gear itself is exchanged to appropriately adjust the meshing phase.

(7) The gear shaving method according to (1) to (6) above, wherein the rotating shaft of the work gear and the rotating shaft of the counter gear are arranged at different positions.
The gear shaving processing method described in this section is configured such that the rotating shaft of the work gear and the rotating shaft of the counter gear are arranged at different positions and meshed with a shaving cutter, thereby shaving the work gear. Is to do.

(8) A gear shaving processing device having a small meshing rate, wherein a counter gear that meshes with the shaving cutter in a state shifted by a half phase with respect to a meshing phase between a shaving cutter having a rotation driving means and a work gear. A gear shaving apparatus provided with a gear (claim 7).
The gear shaving processing device described in this section is configured so that the opposing gear meshes with the shaving cutter and the shaving processing of the work gear is performed with a half phase shift with respect to the meshing phase between the shaving cutter and the work gear. The driving torque of the shaving cutter can be distributed to the work gear and the counter gear. Specifically, when the number of meshing points between the shaving cutter and the work gear is 2, the number of meshing points between the shaving cutter and the counter gear is 1, and the number of meshing points between the shaving cutter and the work gear is When the number is 1, the total number of meshing points of the work gear and the counter gear with respect to the shaving cutter is constant because the number of meshing points of the shaving cutter and the counter gear is two. For this reason, the fluctuation | variation of the pressing force of the cutting blade of the shaving cutter with respect to a to-be-cut gear can be eliminated.

(9) A gear shaving processing device having a small meshing rate, wherein a shaving cutter provided with a rotation driving means and an opposing gear having a large meshing rate with respect to the meshing rate with the work gear mesh with the shaving cutter. A gear shaving processing device (Claim 8).
In the gear shaving machining apparatus described in this section, the shaving cutter provided with the rotation drive means and the opposing gear having a large meshing ratio with the meshing ratio of the work gear mesh with the shaving cutter, and the shaving cutter rotates. By being driven and shaving the workpiece gear, the driving torque of the shaving cutter is distributed between the workpiece gear and the counter gear. Specifically, when the number of meshing points between the shaving cutter and the work gear is changed to 1, 2, 1, 2,..., The number of meshing points between the shaving cutter and the counter gear is, for example, 6, 5, By changing to 6, 5, the total number of meshing points of the work gear and the counter gear with respect to the shaving cutter becomes constant (the variation ratio of the meshing score is small). For this reason, fluctuations in the pressing force of the cutting blade of the shaving cutter against the work gear can be eliminated (reduced).

(10) In the above-mentioned item (9), a shaving machining apparatus in which an opposing gear is meshed with the shaving cutter so that the phase is shifted with respect to the meshing phase between the shaving cutter and the work gear ( Claim 9).
In the gear shaving processing apparatus described in this section, the opposing gear is engaged with the shaving cutter so that the phase is shifted with respect to the meshing phase between the shaving cutter and the work gear, and the work gear is shaved. By performing, the function and effect of the item (8) are obtained together with the function and effect of the item (9).

(11) A gear shaving apparatus (claim 10), wherein the rotating shaft of the shaving cutter and the rotating shaft of the counter gear are arranged in parallel in the items (8) to (10).
In the gear shaving processing apparatus described in this section, the rotating shaft of the shaving cutter and the rotating shaft of the counter gear are arranged in parallel so that they mesh with each other, thereby obtaining the effects of the above items (8) to (10). Is.

(12) A gear shaving machining apparatus according to (8) to (11) above, wherein a front meshing ratio between the shaving cutter and the work gear is set to 2.0 or less.
The gear shaving machining apparatus described in this section obtains the effects of the above items (8) to (11) when the front meshing ratio between the shaving cutter and the work gear is 2.0 or less.

(13) In the above items (8) to (12), the shaving processing of the gear supported on the same cutter head so that the relative position of the rotating shaft between the shaving cutter and the counter gear can be adjusted. Apparatus (claim 11).
The gear shaving processing device described in this section adjusts the relative position of the rotating shaft between the shaving cutter and the counter gear that are supported by the same cutter head, so that the meshing phase between the shaving cutter and the work gear is adjusted. The meshing phase between the shaving cutter and the counter gear is appropriately adjusted, and the counter gear itself is exchanged as necessary to adjust the mesh phase appropriately.

(14) The gear shaving method as described in (8) to (13) above, wherein the rotation shaft of the work gear and the rotation shaft of the counter gear are disposed at different positions.
The gear shaving processing apparatus described in this section performs shaving processing of a work gear by engaging a work gear and a counter gear, which are arranged at different positions, with a shaving cutter. is there.

  Since the present invention is configured in this way, when shaving a gear with a low meshing rate, fluctuations in the force of pressing the cutting blade of the shaving cutter against the work gear are removed as much as possible, and the tooth surface accuracy of the work gear is improved. Deterioration can be avoided.

It is a schematic diagram of the processing apparatus used for the shaving processing method of the gear which concerns on embodiment of this invention. It is a schematic diagram of a conventional gear machining device, (a) shows the case where the work gear is a spur gear, and (b) shows the case where the work gear is a helical gear.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIG. Detailed description of the same or corresponding parts as those of the prior art will be omitted.
First, the shaving processing method for a gear according to the first embodiment of the present invention includes a shaving cutter 10 and a shaving cutter 10 when a gear having a low meshing rate such as a spur gear or a helical gear with a small helix angle is shaved. The shaving cutter 10 is driven to rotate and the shaving cutter 10 is rotationally driven so that the shaving cutter 10 is engaged with the shaving cutter 10 so as to be in a state shifted by a half phase relative to the meshing phase with the work gear 12. It is.
In the shaving apparatus used here, the front meshing rate between the shaving cutter 10 and the work gear 12 is set to 2.0 or less. Further, the rotating shaft 12C of the work gear 12 and the rotating shaft 14C of the counter gear 14 are not coaxial, but are disposed at different positions. Moreover, unlike the relationship between the rotating shaft 10C of the shaving cutter 10 and the rotating shaft 12C of the work gear 12, the rotating shaft 10C of the shaving cutter 10 and the rotating shaft 14C of the counter gear 14 are arranged in parallel without crossing each other. The

Further, the shaft is supported on the same cutter head 16 by an appropriate shaft attachment structure so that the relative position of the rotating shaft 10C of the shaving cutter 10 and the rotating shaft 14C of the counter gear 14 can be adjusted. More specifically, the cutter head of a conventional general shaving apparatus is slightly enlarged so that the counter gear 14 can be pivotally supported. Further, the position of the rotating shaft 14C of the counter gear 14 is not limited to the position adjustment around the rotating shaft 10C of the shaving cutter 10 indicated by the arrow A in FIG. 1, but the rotation of the shaving cutter 10 as indicated by the arrow B. Position adjustment in a direction in which the positions of the shaft 10C and the rotating shaft 14C of the counter gear 14 are separated and approached is also possible.
The shaving cutter 10 is connected to a rotational drive means 18 such as a motor by an appropriate power transmission structure.

  Now, according to the embodiment of the present invention configured as described above, the following operational effects can be obtained. That is, the shaving cutter 10 is engaged with the opposing gear 14 so as to be shifted by a half phase with respect to the meshing phase between the shaving cutter 10 and the work gear 12, and the work gear 12 is shaved. The driving torque of the cutter 10 is distributed to the work gear 12 and the counter gear 14. Specifically, when the number of meshing points between the shaving cutter 10 and the work gear 12 is 2, the number of meshing points between the shaving cutter 10 and the counter gear 14 is 1, and the shaving cutter 10 and the work gear 12 are When the number of meshing points is 1, the number of meshing points between the shaving cutter 10 and the counter gear 14 is 2, so that the total number of meshing points of the work gear 12 and the counter gear 14 with respect to the shaving cutter 10 is three. It becomes constant at. For this reason, the fluctuation of the pressing force of the cutting blade of the shaving cutter 10 against the work gear 12 is eliminated.

  In the present embodiment, due to the gear structure, the basic circle diameters of the work gear 12 and the counter gear 14 are the same or substantially the same, and the positions of the work gear 12 and the counter gear 14 with respect to the shaving cutter 10 (the shaving cutter 10 By appropriately adjusting the relative position of the rotary shafts 12C and 14C of the work gear 12 and the counter gear 14 with respect to the rotary shaft 10C, it is inevitably half of the meshing phase between the shaving cutter 10 and the work gear 12 The opposing gear 14 meshes with the shaving cutter 10 so that the phase is shifted.

  Even when the work gear 12 is changed, the shaving cutter is adjusted by adjusting the relative position of the rotary shaft 10C of the shaving cutter 10 and the rotary shaft 14C of the counter gear 14 according to the work gear 12. The meshing phase between the shaving cutter 10 and the counter gear 14 with respect to the meshing phase between the gear 10 and the work gear 12 can be adjusted appropriately. Moreover, even if the counter gear 14 itself is replaced as necessary, each meshing phase can be adjusted appropriately.

Subsequently, a gear shaving method according to a second embodiment of the present invention will be described. Here, detailed description of the same or corresponding portions as those of the prior art or the first embodiment of the present invention will be omitted.
In the second embodiment of the present invention, when the gear having a small meshing rate is shaved, the opposing gear 14 having a large meshing rate with respect to the meshing rate between the shaving cutter 10 and the work gear 12 is shaved. The shaving cutter 10 is engaged with the cutter 10, and the shaving cutter 10 is rotationally driven to perform the shaving processing of the work gear 12.

The driving torque of the shaving cutter 10 is distributed to the work gear 12 and the counter gear 14 also by the gear shaving method according to the second embodiment of the present invention. Specifically, when the number of meshing points between the shaving cutter 10 and the work gear 12 changes to 1, 2, 1, 2,..., The number of meshing points between the shaving cutter 0 and the counter gear 14 is, for example, By changing to 6, 5, 6, 5, the total number of meshing points of the work gear 12 and the counter gear 14 with respect to the shaving cutter 10 becomes constant (the variation ratio of the meshing score is small). For this reason, the fluctuation of the pressing force of the cutting blade of the shaving cutter 10 against the work gear 12 is not (small).
In addition, description of the same function and effect as those of the first embodiment of the present invention is omitted.

  In the second embodiment of the present invention, the phase is shifted with respect to the meshing phase between the shaving cutter 10 and the work gear 12 as in the first embodiment of the present invention. If the opposing gear 14 is meshed with the shaving cutter 10, the effects of the first and second embodiments can be obtained, and the cutting edge of the shaving cutter 10 with respect to the work gear 12 can be obtained. It becomes possible to obtain a synergistic effect of suppressing the fluctuation of the pressing force.

  10: Shaving cutter, 12: Work gear, 14: Opposing gear, 10C, 12C, 14C: Rotating shaft, 16: Cutter head, 18: Rotation drive means

Claims (12)

A method of shaving a gear with a low meshing rate, in which an opposing gear is meshed with the shaving cutter so as to be shifted by a half phase with respect to the meshing phase between the shaving cutter and the work gear, and the shaving cutter is rotated. A gear shaving method comprising driving and shaving a workpiece gear. A method for shaving a gear with a small meshing rate, wherein an opposing gear having a large meshing rate with respect to the meshing rate between the shaving cutter and the work gear is meshed with the shaving cutter, and the shaving cutter is driven to rotate. A shaving process method for a gear, characterized by performing a shaving process on a work gear. The gear shaving processing method according to claim 2, wherein an opposing gear is engaged with the shaving cutter so that the phase is shifted with respect to a phase of engagement between the shaving cutter and the work gear. The gear shaving method according to any one of claims 1 to 3, wherein a rotating shaft of the shaving cutter and a rotating shaft of the counter gear are arranged in parallel. The gear shaving method according to any one of claims 1 to 4, wherein a front meshing ratio between the shaving cutter and the work gear is 2.0 or less. The gear shaving method according to any one of claims 1 to 5, wherein a relative position of a rotation shaft between the shaving cutter and the counter gear is adjusted according to the work gear. A shaving processing device for a gear with a small meshing rate, comprising a shaving cutter having a rotation driving means and an opposing gear meshing with the shaving cutter in a state shifted by a half phase with respect to a meshing phase with a work gear. A gear shaving processing device. A shaving processing device for a gear having a small meshing rate, wherein a shaving cutter provided with a rotation drive means and an opposing gear having a large meshing rate with respect to the meshing rate with the work gear are meshed with the shaving cutter. A gear shaving apparatus characterized by that. The shaving machining apparatus according to claim 8, wherein an opposing gear is meshed with the shaving cutter so as to be out of phase with respect to a meshing phase between the shaving cutter and the work gear. The gear shaving apparatus according to any one of claims 7 to 9, wherein a rotating shaft of the shaving cutter and a rotating shaft of the counter gear are arranged in parallel. 11. The gear shaving apparatus according to claim 7, wherein a front meshing ratio between the shaving cutter and the work gear is set to 2.0 or less. The gear according to any one of claims 7 to 11, wherein the gear is supported by the same cutter head so that a relative position of a rotation shaft between the shaving cutter and the counter gear can be adjusted. Shaving processing equipment.

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