JP2018130795A - Method for machining gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of machining a gear that comprises dress machining and honing machining and that can arbitrarily modify the gear over the entire tooth flanks.SOLUTION: A method of machining a gear that performs dress machining for forming a tooth flank 12 of a honing grindstone 10 with a tooth flank 32 of a dress gear 30 and also performs honing machining on a tooth flank 22 of a machined gear 20 mounted in replacement with the dress gear 30 with the tooth flank 12 of the honing grindstone 10 is characterized in that a position of meshing between the dress gear 30 and honing grindstone 10 in the dress machining is different from a position of meshing between the machined gear 20 and the honing grindstone 10 in the honing machining.SELECTED DRAWING: Figure 4

Description

  The present invention performs dressing for forming the tooth surface of the honing grindstone by the tooth surface of the dress gear, and performs honing of the tooth surface of the gear to be machined mounted instead of the dress gear by the tooth surface of the honing grindstone. The present invention relates to a gear processing method.

  A gear machining method for performing dressing for forming a tooth surface of a honing grindstone by a tooth surface of a dressing gear, and performing honing of a tooth surface of a gear to be machined mounted instead of the dressing gear by the tooth surface of the honing grindstone Is conventionally known.

  In general, dressing of a honing grindstone is performed using a dressing gear having substantially the same tooth surface as the desired gear tooth surface, and a tooth surface having the same shape as the tooth surface of the dress gear is formed on the honing grindstone. For this reason, it is necessary to prepare a dress gear for each gear tooth surface to be obtained, and the versatility is low.

  As an improvement, the relative position (including angle (crossing angle)) of the dressing gear and honing wheel during dressing and the position of the gear and honing wheel (angle (crossing angle)) during honing are as follows: The processing method of the gear shown in patent document 1 which makes it different from (including) is known.

  According to this processing method, since a single dress gear is used and tooth surfaces having various shapes different from the tooth gear surface of the dress gear can be formed on the honing grindstone, the versatility is high. The tooth surfaces of the honing wheel dressed with the dress gear are all the tooth surfaces of the staggered axial contact gear. For example, the gear machining methods shown in Patent Documents 2 to 4 are known as methods for applying the method shown in Patent Document 1 and forming tooth surfaces of staggered axial contact gears by dressing.

  And, according to the gear machining method shown in Patent Document 1, it is possible to grasp all the tooth surface formation of the honing grindstone and the tooth surface formation of the gear to be machined, and it is possible to grasp the interference state of the tooth surface due to the modification, for example, Also, a bias tooth surface having a complicated shape can be easily formed. Incidentally, the bias tooth surface is a tooth surface that is used for gears for automobiles and the like, and the tooth shape changes along the tooth trace. Thus, the tooth profile can be corrected. Of course, in order to avoid interference of the tooth surface, it may be necessary to narrow the contact range between the tooth surface of the grindstone and the tooth surface of the dress gear. If the contact range is narrowed, it is necessary to dress the entire grindstone, and thus traverse is performed to form a necessary tooth surface on the entire grindstone.

  In order to improve the cutting of the grindstone, traversing at the time of dressing and honing is one of the common means. In this case, the amount of traverse is small so that the formed tooth surface is not broken by interference. Also, in general processing such as grinding, as shown in Patent Document 5, in order to obtain an arbitrary shape, performing contact processing (truing) while narrowing the contact range and traversing is generally performed.

  When a dress gear with a narrow contact range is used, the traverse amount increases because the entire grindstone is dressed. On the other hand, the workpiece is attached during the honing process, and the tooth surface of the work and the tooth surface of the honing grindstone are in contact with each other over the whole or substantially the whole, so that the amount of traverse is reduced because it is necessary to avoid interference.

  The amount of traverse varies greatly between dressing and honing. In other words, the positional relationship changes between dressing and honing.

  As described above, it is natural to apply traverse and reduce the contact range of the dress gear by applying Patent Document 5 and other conventionally known gear processing methods. The shown gear processing method is also considered as one of such techniques. Furthermore, the method disclosed in Patent Document 1 is used as a method for changing the positional relationship between dressing and honing.

  For example, the gear machining methods shown in Patent Documents 2 and 3 use a plate-shaped dress gear to reduce interference by reducing the length of the tooth surface of the dress gear in the tooth trace direction and narrowing the contact tooth surface. Such a gear processing method can be dealt with only by using the method of Patent Document 1, as described above.

  By the way, in normal truing (forming) of a general grindstone, as shown in Patent Document 5, a truing tool having a narrower width than that of a grindstone is used, and in the same document, the grindstone is trued by traverse. . Also in Patent Document 6, a honing grindstone having a width several times that of a dress gear is used.

  Further, the gear machining method shown in Patent Document 4 uses a dress gear having a convexly curved tooth surface that rises in a mountain shape in order to limit the contact range on the tooth surface and reduce interference. As described above, a simple gear processing method can be dealt with only by using the method of Patent Document 1.

  Incidentally, since the dress gear of Patent Document 4 does not need to be formed as thin as the dress gears of Patent Documents 2 and 3, the durability of the dress gear is improved. In addition, Patent Document 4 states that, for Patent Document 1, the tooth surface shape of the dress gear is the same as the tooth surface shape of the gear to be machined except for the modified tooth surface. At the time of formation, if the correction width is increased by using the method of Patent Document 1 instead of the same shape, completely different tooth surfaces are formed, so this description is not appropriate, and gear honing is performed. However, only using the technique of Patent Document 1, various tooth surfaces different from the tooth gear surface of the dress gear can be formed on the tooth surface of the gear to be processed.

  As described above, Patent Documents 2 to 4 are based on the method of Patent Document 1. Furthermore, Patent Document 3 shows a method of changing the crossing angle during dressing. In Patent Document 1, as an example of a method of changing the relative position of the dress gear and the grindstone during dressing, the crossing is performed. Means for changing the angle have already been shown, and became known at the time of filing of this Patent Document 1.

Japanese Patent No. 4406895 International Publication No. 2011/157830 Pamphlet International Publication No. 2014/041191 Pamphlet JP 2017-6989 A JP 2007-125644 A JP-A-6-226532

  In any of the gear machining methods, when the crossing angle at the time of dressing is different from the crossing angle at the time of honing, the gear to be machined at the time of honing and the relative turning position of the honing grindstone, The relative turning position of the dressing gear and the honing grindstone during dressing is changed.

  For example, in the example shown in FIG. 8, the honing grindstone 80 is swung around the axis of the crossing angle axis Y so that the crossing angle of the shaft changes. The tooth surface 81 of the honing grindstone 80 at the time is displaced. The amount of displacement d ′ increases as the distance from the crossing angle axis Y increases, and the modification width of the tooth surface increases accordingly. The same applies to the case where the crossing angle is changed by turning the gear to be processed or the dressing gear about the crossing angle axis Y.

  That is, the correction width decreases at a position close to the crossing angle axis Y, and the correction width increases at a position far from the intersection angle axis Y. This difference in the correction width complicates the control for obtaining the desired tooth surface, and the tooth surface positions of the dress gear and the work gear cannot be made different at the center of oscillation about the crossing angle axis Y. Therefore, the adjustment width becomes zero.

  An object of the present invention is to provide a gear machining method for performing dressing and honing, and capable of arbitrarily setting a modification over the entire tooth surface.

  In order to solve the above-mentioned problems, the dressing process is performed to form the tooth surface of the honing grindstone with the tooth surface of the dress gear, and the honing of the tooth surface of the gear to be machined mounted instead of the dress gear is performed. In the gear machining method performed by the surface, the meshing position between the dressing gear and the honing grindstone during dressing is different from the meshing position between the gear to be machined and the honing grindstone during honing.

  It is good also as what processes while changing the meshing position of a dress gear or a to-be-processed gear, and a honing grindstone.

  At least one of the honing grindstone and the rotating shaft of the dressing gear or the processed gear is offset from the Y axis that intersects both the rotating shaft of the honing grindstone and the rotating shaft of the dressing gear or the gear to be processed. May be relatively displaced.

  By performing processing while changing at least one of the relative distance between rotation axes or the axis crossing angle, the lead value, and the relative offset amount between the honing grindstone and the dressing gear or the gear to be processed, A predetermined predetermined tooth surface may be obtained.

  By performing processing by changing at least one of the relative rotation axis distance or the axis crossing angle, the lead value, and the relative offset amount between the honing grindstone and the dressing gear or the gear to be processed, A predetermined predetermined tooth surface may be obtained.

  It is assumed that the Y axis is configured to be orthogonal to the rotation axis of the honing grindstone and orthogonal to the rotation axis of the dress gear or the gear to be processed, and the offset direction is set to a direction perpendicular to the Y axis. Also good.

  The end of the tooth tip may be a chamfered or R-shaped dress gear.

  When creating a tooth surface in the initial dressing process of a honing grindstone, the tooth width of the dress gear is made larger than the tooth width of the honing grindstone so that the end of the tooth tip of the dress gear does not act during the dressing process. Also good.

  Compared with the case where the crossing angle of the dressing gear and the gear to be machined is changed because the meshing position of the dressing gear and the honing wheel at the time of dressing is different from the meshing position of the gear to be machined and the honing stone at the time of honing. Thus, the correction width can be arbitrarily set over the entire tooth surface.

It is a principal part front view which fractures | ruptures and shows the example of a structure of the gear honing machine which processes a gear by the gear processing method to which this invention is applied. It is a principal part side view which fractures | ruptures and shows the example of a structure of the gear honing machine which processes a gear by the gear processing method to which this invention is applied. It is a perspective view which shows the structural example of the operating shaft of the gear honing machine shown in FIG. It is explanatory drawing explaining the difference in the meshing position at the time of dress processing and honing processing, and shows a cross section perpendicular to the X axis at a certain position on the X axis. It is sectional drawing which shows an example of the tooth profile of the tooth | gear part of a dress gear. It is a principal part perspective view which shows the state made to traverse at the time of dressing. It is a principal part perspective view which shows the shape of the tooth | gear of a dress gear. It is a principal part enlarged view which shows an example of the displacement of the tooth-surface part of a grindstone when an axis crossing angle is changed.

  1 and 2 are a fragmentary front view and a fragmentary side view, partially broken away, showing a structural example of a gear honing machine that performs gear machining by the gear machining method to which the present invention is applied. These are the perspective views which show the structural example of the operating shaft of the gear honing machine shown in FIG.

  The gear honing machine (gear processing apparatus) includes a honing grindstone 10 having an inner tooth 11 and formed in a ring shape, and a workpiece gear (work) 20 having outer teeth 21 and 31 and formed in a cylindrical shape. Alternatively, a dressing gear 30, a grinding wheel side support mechanism (not shown) that rotatably supports the honing grindstone 10, and a cylindrical shaft center of the gear to be processed 20 or the dressing gear 30 are used as a rotation shaft (gear shaft) S2. One or a plurality of grinding wheel side actuators (illustrated) such as a gear side support mechanism 40 that rotatably supports the workpiece gear 20 or the dress gear 30 and an electric motor that rotationally drives the honing wheel 10 supported by the grinding wheel side support mechanism. And one or a plurality of gears such as an electric motor that rotationally drives the work gear 20 or the dress gear 30 supported by the gear-side support mechanism 40. And an actuator (not shown).

Here, the rotation axis S2 is the X axis, the rotation axis (grinding wheel axis) S1 of the honing grindstone 10 is the X ′ axis, and intersects (for example, orthogonally) with the two rotation axes S1 and S2. The axis is the Y axis, and a straight line that is perpendicular to the X axis or the X ′ axis (in this example, the X axis in this example) and is orthogonal to the Y axis is the Z axis. O ₁ is the intersection of the rotation axis S ₁ of the honing grindstone 10 and the Y axis, and O ₂ is the intersection of the rotation axis S ₂ of the gear 20 or dress gear 30 and the Y axis.

  The honing grindstone 10 is a grindstone in which a plurality of teeth 11 are formed at equal intervals on a ring-shaped inner peripheral surface, and the entirety is formed in a gear shape.

  A plurality of teeth 21 that mesh with the teeth 11 of the honing grindstone 10 are formed at equal intervals on the outer peripheral surface of the work gear 20. Specifically, the gear 20 to be processed can be obtained by forming into a gear shape by cutting or the like and then hardening and hardening. With respect to the gear 20 to be processed, honing is performed on the tooth surface (tooth surface of the gear to be processed) 22 of the tooth 21 by the tooth surface (honing wheel tooth surface) 12 of the tooth 11 of the honing wheel 10. .

  A plurality of teeth 31 that mesh with the teeth 11 of the honing grindstone 10 are formed at equal intervals on the outer peripheral surface of the dress gear 30. The tooth surfaces (dress gear tooth surfaces) 32 of the teeth 31 are made of a hard and wear-resistant material. Specifically, for example, abrasive grains such as diamond are electrodeposited.

  The gear-side support mechanism 40 includes a support shaft 41 on which the work gear 20 or the dress gear 30 is selectively mounted and the rotation axis S2 as an axis, and the work gear 20 or the dress gear is supported by the support shaft 41. It is configured to support any one of 30.

  The grindstone-side support mechanism rotatably supports the honing grindstone 10 so as to mesh with the workpiece gear 20 or the dress gear 30 mounted on the support shaft 41.

  Further, the honing grindstone 10 and the work gear 20 or the dress gear 30 are changed in relative position and posture by the operation of one or both of the grindstone side support mechanism and the gear support mechanism 40.

  The work gear 20 or the dress gear 30 supported by the support shaft 41 is slid relative to the honing grindstone 10 in the direction along the X axis (the direction of arrow A in FIG. 3).

  In addition, the work gear 20 or the dress gear 30 supported by the support shaft 41 is in the direction along the Y axis with respect to the honing grindstone 10 (the direction of the arrow B in FIG. ”). By the relative movement in the cutting direction, the distance D between the rotation axes, which is the distance between the two rotation axes S1 and S2, changes.

  Further, either or both of the work gear 20 supported by the support shaft 41 and the dress gear 30 are separated (offset) from the Y axis (specific examples are Z shown by an arrow C in FIG. 3). Slide relative to the direction parallel to the axis. After such a movement operation in the offset direction, the positional relationship between the two rotation axes S1 and S2 also changes.

  Incidentally, the relative movement of the grindstone shaft S1 and the gear shaft S2 may be performed by displacing the honing grindstone 10 by the grindstone-side actuator or by displacing the workpiece gear 20 or the dress gear 30 by the gear-side actuator. Alternatively, both may be displaced.

  Subsequently, the honing grindstone 10 is moved relative to the work gear 20 or the dress gear 30 supported by the support shaft 41 in the direction around the Z axis (in the direction of arrow D in FIG. 3). Turn.

  Further, the honing grindstone 10 is swiveled relative to the workpiece gear 20 or the dress gear 30 supported by the support shaft 41 in the direction around the Y axis (the direction of arrow E in FIG. 3). Let By turning around the Y axis, an axis crossing angle θ which is an angle formed by the two rotation axes S1 and S2 in the axial view of the Y axis changes. This axis crossing angle θ causes relative slip between the tooth surfaces 12, 22, 32 engaged with each other when the honing grindstone 10 and the work gear 20 or the dress gear 30 are rotated during dressing or honing. Thus, machining can be performed by this sliding and sliding by meshing. Since this method is conventionally known, details are omitted.

  Incidentally, the two types of turning are performed using one or both of the grinding wheel side actuator and the gear side actuator.

  The setting position and operation of these shafts are factors that determine the shape of the tooth surface 22 formed by honing and the shape of the tooth surface 12 formed by dressing. Is also an element that determines the tooth surfaces 12 and 22.

  Specifically, when the tooth trace is a cylindrical gear that is a crumbling line, the crumbling line has a predetermined helix angle on the reference cylinder, advances by a predetermined distance with respect to one rotation, and per one rotation. The distance traveled is called a lead, and this lead can be adjusted as appropriate by changing the meshing rotation phase between the honing grindstone 10 and the work gear 20 or the dress gear 30.

  Tooth required for the honing grindstone 10 and the work gear 20 is changed by appropriately changing the above values, and also disengaging the meshing position EP (see FIG. 4) between the honing grindstone 10 and the gear 20 or the dressing gear 30. Surface 12 is formed.

  Next, a gear machining method using the gear honing machine having the above-described configuration will be described with reference to FIGS.

  When performing the honing process, the gear 20 to be processed is attached to the support shaft 41 so as to rotate integrally, and the honing grindstone 10 and the teeth 21 of the honing grindstone 10 are engaged with the teeth 21 of the gear 20 to be processed. The gear to be machined 20 is rotationally driven, and the tooth surface 22 of the tooth 21 of the gear to be machined 20 is honed by the tooth surface 12 of the tooth 11 of the honing grindstone 10.

  When the honing is performed on a plurality of gears 20 to be machined, the tooth surfaces 12 of the teeth 11 of the honing grindstone 10 are worn and changed, and the honing accuracy is gradually lowered. After performing the honing process, a dressing process is performed for the purpose of re-forming the teeth 11 of the honing grindstone 10.

  When performing dressing, the gear 20 to be machined mounted on the support shaft 41 is replaced with the dressing gear 30, and the honing grindstone 10 and the teeth 11 of the honing grindstone 10 are engaged with the teeth 31 of the dressing gear 30. The dress gear 30 is engaged and rotated, and the teeth 11 of the honing grindstone 10 are re-formed (dress processing) by the tooth surfaces 32 of the teeth 31 of the dress gear 30.

  In the conventional dressing method, the shape of the dress gear 30 and the original shape (the shape after processing) of the gear 20 to be processed are substantially the same shape. In this case, a dedicated dress gear 30 is required for each shape required by the work gear 20, and versatility is poor.

  For this reason, in this gear processing method, gears having tooth surfaces 22 and 32 having different shapes are used for the gear 20 to be processed and the dress gear 30. As a tooth surface shape of the dress gear 30, for example, a shape as shown in JP 2017-6989 A is employed.

  FIG. 4 is an explanatory diagram for explaining the difference in meshing position during dressing and honing, and shows a cross section perpendicular to the X-axis at a certain position on the X-axis. Incidentally, in the same figure, the difference in meshing position is schematically represented by EP and EP ′.

  At the time of dressing, in order to form the tooth surface 12 required for the honing grindstone 10, the relative rotation axis distance or the axis crossing angle, the lead value, and the relative offset between the honing grindstone and the dressing gear or the work gear. At least one of the quantities is changed and dressing is performed to obtain a predetermined tooth surface, or the relative distance between the rotation axes or the axis crossing angle, the lead value, and the honing grindstone Dressing is performed while changing at least one of the relative offset amount between the gear and the dressing gear or the gear to be processed, thereby obtaining a predetermined tooth surface.

  On the other hand, in the honing process, in order to form the tooth surface 22 required for the work gear 20, the relative distance between the rotation axes or the axis crossing angle, the lead value, and the relative relationship between the honing grindstone and the dress gear or the work gear. At least one of the offset amounts is changed, honing is performed, and a predetermined tooth surface is obtained in advance, or the relative rotation axis distance or crossing angle, the lead value, Honing is performed while changing at least one of the relative offset amounts of the honing grindstone and the dressing gear or the gear to be processed to obtain a predetermined predetermined tooth surface.

  As shown in FIG. 4, any desired tooth surface can be obtained by processing at different meshing positions during dressing and honing. The displacement amount is 0 at the turning center around the axis of the Y axis when the axis crossing angle θ is changed by the movement offset from the Y axis that does not exist in the prior art (for example, movement in the Z axis direction). In addition, the amount of displacement is limited in the vicinity of the turning center, and the problem that a desired tooth surface cannot be obtained can be solved.

  Specifically, when obtaining the tooth surface to be obtained, the meshing position EP between the honing grindstone 10 and the gear 20 to be machined at the time of honing is used as a reference, whereas the honing grindstone 10 and the dress gear 30 at the time of dressing are used. It is important how to change the engagement position EP ′. Incidentally, the reference meshing position gradually changes on the X axis.

  For example, at the time of dressing, the honing grindstone 10 and the dressing gear 30 are moved on the X axis by traverse, and honing while changing from the meshing position EP of the reference meshing position on the X axis as necessary. A grinding wheel 10 is created. Subsequently, at the time of honing, the honing grindstone 10 and the entire gear 20 to be processed are engaged at the reference engagement position, whereby a desired tooth surface 22 is formed.

  Further, the honing grindstone 10 and the dressing gear 30 can be meshed with the phase (meshing phase) matched, but meshing with the phase shifted is also an option. As a method of shifting the phase, for example, there are a method of shifting the rotation of the grindstone shaft S1 or the gear shaft S2, a method of changing the lead, and the like.

  By the way, when a grindstone having a simple cylindrical shape or the like is formed with a truing tool, the contact position of the abrasive grains is changed, it is smooth, the sliding speed is constant, and the wear of the truing tool is uniform.

  On the other hand, the dress gear 30 meshes with the honing grindstone 10, the phase of the both does not change, the sliding speed is not constant, and the tooth tip of the tooth 31 of the dress gear 30 goes through the bottom of the honing grindstone 10. Therefore, this tooth tip is overloaded.

  Moreover, as shown in FIG. 5, diamond abrasive grains 34 are generally electrodeposited on the teeth 31 of the dress gear 30, but as shown in FIG. 5, the tooth tips 33 of the teeth 31 of the dress gear 30 are The width (land) d is very small compared to other portions, the number of the abrasive grains 34 is small, and the electrodeposition strength is also weak.

  In such a harsh environment, the tooth surface 12 of the honing grindstone 10 is formed by a traverse that moves relative to the tooth trace direction in a meshed state during dressing. At this time, as shown in FIG. 6, the tooth bottom 14 side of the honing grindstone 10 is traversed by the end portion (edge) in the tooth trace direction of the tooth tip 33 of the tooth 31 of the dress gear 30. . For this reason, if this edge 33a is formed in a sharp shape as shown by an imaginary line in FIG. 7, an excessive load is applied, and in some cases, the abrasive grains 34 fall off and the metal is shaved. The dress gear 30 cannot be used.

  Therefore, the edge 33a is formed into a chamfered shape as shown by a solid line in FIG. 7, or is formed into an R shape (arc surface shape) to reduce the load.

  Subsequently, the initial dressing will be described.

  The honing grindstone 10 that needs to be replaced for reasons such as changing the stage and the life of the grindstone is removed from the grindstone-side support mechanism of the gear honing machine, and a new honing grindstone 10 is attached to the honing machine. The new honing grindstone 10 has a rough tooth surface shape.

  Then, the initial dressing is performed by finish-molding the tooth surface 12 to the tooth surface 12 with an accuracy capable of honing including the deflection of the honing grindstone 10 when attached to the honing machine.

  In the initial dressing, about 10 times of normal dressing is cut into the honing grindstone 10. If dressing by traverse like this time is performed at the time of initial dressing, as described above, considerable damage is taken. For this reason, in consideration of the initial dressing, the dressing gear 30 that is sufficiently wide with respect to the honing grindstone 10 and capable of traverse dressing is used so that the edge portion of the tooth tip does not act. This can greatly extend the life.

  Then, after initial dressing, dressing by traverse is performed with the same dress gear, and the tooth surface 12 of the honing grindstone 10 is formed into a desired shape. Incidentally, the dress gear 30 satisfying such conditions can be initially dressed in a state in which the edge 33a does not act, and has a tooth surface having a small contact range with respect to the tooth surface of the honing grindstone 10, and is usually subjected to traverse. The dressing process is set so as to be possible, and it is used. For example, it is a dress gear 30 as shown in JP 2017-6989 A. Although it costs money, different dress gears may be used for initial dressing and normal dressing.

  According to the gear machining method configured as described above, the meshing position can be changed by adding an operation in the Z-axis direction to the conventional movement, and an arbitrary meshing position can be obtained. It becomes easy to freely obtain an arbitrary tooth surface shape.

  In this example, the externally toothed work gear 20 and dressing gear 30 and the internal toothed honing grindstone 10 are used. However, the honing grindstone 10 is used as external teeth that mesh with the externally toothed working gear 20 and the dressing gear 30. In addition, the honing grindstone 10 having external teeth may be used for the work gear 20 and the dress gear 30 that have internal teeth and are formed in a ring shape. The dress gear 30 may have a different number of teeth from the gear 20 to be processed.

DESCRIPTION OF SYMBOLS 10 Honing grindstone 11 Tooth 12 Tooth surface 13 Tooth tip 14 Tooth bottom 20 Gear to be machined 21 Tooth 22 Tooth surface 30 Dress gear 31 Tooth 32 Tooth surface 33 Tooth tip 33a Edge 34 Abrasive grain 40 Gear side support mechanism 41 Support shaft d Land D Rotation Inter-axis distance O ₁ intersection O ₂ intersection S1 Rotation axis (grinding wheel axis)
S2 Center of rotation (gear shaft)
θ axis crossing angle

Claims (8)

A gear machining method for performing dressing for forming a tooth surface of a honing grindstone by a tooth surface of a dressing gear, and performing honing of a tooth surface of a gear to be machined mounted instead of the dressing gear by the tooth surface of the honing grindstone In
A gear machining method, wherein a meshing position between a dressing gear and a honing grindstone during dressing is different from a meshing position between a gear to be machined and a honing grindstone during honing. The gear machining method according to claim 1, wherein machining is performed while changing a meshing position between the dressing gear or the gear to be machined and the honing grindstone. At least one of the honing grindstone and the rotating shaft of the dressing gear or the processed gear is offset from the Y axis intersecting both the rotating shaft of the honing grindstone and the rotating shaft of the dressing gear or the gear to be processed. The gear processing method according to claim 1, wherein the gear is relatively displaced. By performing processing while changing at least one of the relative distance between rotation axes or the axis crossing angle, the lead value, and the relative offset amount between the honing grindstone and the dressing gear or the gear to be processed, The gear processing method according to claim 3, wherein a predetermined predetermined tooth surface is obtained. By performing processing by changing at least one of the relative rotation axis distance or the axis crossing angle, the lead value, and the relative offset amount between the honing grindstone and the dressing gear or the gear to be processed, The gear processing method according to claim 3, wherein a predetermined predetermined tooth surface is obtained. The Y axis is configured to be orthogonal to the rotation axis of the honing grindstone and orthogonal to the rotation axis of the dress gear or the work gear,
The gear machining method according to any one of claims 3 to 5, wherein the offset direction is set in a direction perpendicular to the Y axis. The gear processing method according to any one of claims 1 to 6, wherein a dress gear having a chamfered shape or an R shape is used for an end portion of the tooth tip. The tooth width of the dress gear is made larger than the tooth width of the honing grindstone so that the end of the tip of the dress gear does not act at the time of dressing when creating a tooth surface in the initial dressing of the honing grindstone. The gear processing method according to any one of 1 to 7.

Images