JP2023106856A - Gear processing device - Google Patents

Abstract

To provide a gear processing device which can generate a highly accurate internal tooth by pouring fluid over a wide range in the peripheral direction of an inner peripheral surface of a workpiece.SOLUTION: A gear skiving cutter T constituting a gear processing device 1 includes a fluid discharge nozzle 60 having a first discharge channel 64 and a second discharge channel 65. The first discharge channel 64 discharges fluid F1 toward a position different from a processing point P of an inner peripheral surface of a workpiece W from a first opening 64a at an angle at which the processing point P is located. The second discharge channel 65 discharges fluid F2 toward a cutting blade 52 from a second opening 65a at an angle at which the processing point P is located, or discharges the fluid F2 toward a position different in the axial direction of the workpiece W from the position to which the fluid is discharged from the first discharge channel 64 of the inner peripheral surface of the workpiece W from the second opening 65a.SELECTED DRAWING: Figure 4

Description

The present invention relates to a gear machining apparatus.

Patent Literatures 1 and 2 describe a gear machining apparatus that creates internal teeth on the inner peripheral surface of a workpiece by machining the workpiece using a gear skiving cutter. In the gear machining apparatus, it is described that the gear skiving cutter includes a fluid discharge nozzle for discharging a fluid (for example, an aqueous coolant solution) radially outward at a portion near the rotation axis. Since chips and the like can be removed by the fluid discharged from the fluid discharge nozzle, good gear machining can be achieved.

JP 2018-24060 A JP 2015-164751 A

In a machining method for creating internal teeth on the inner peripheral surface of a workpiece using a gear skiving cutter, the rotation axis of the gear skiving cutter is set to have a crossed axis angle with respect to the rotation axis of the workpiece. This is done by relatively moving the gear skiving cutter in the axial direction of the workpiece.

Since the gear skiving cutter and the workpiece have a crossed axis angle, the fluid discharged from the outer peripheral surface of the fluid discharge nozzle is applied only to a part of the inner peripheral surface of the workpiece in the circumferential direction. For example, if the fluid is applied to the vicinity of the machining point by the gear skiving cutter, the fluid may not be applied to a region different from the machining point in the circumferential direction of the inner peripheral surface of the workpiece.

In particular, when machining internal teeth on the inner peripheral surface of a workpiece, chips are more likely to stay on the inner peripheral surface of the workpiece than when machining external teeth on the outer peripheral surface of the workpiece. Chips remaining on the inner peripheral surface of the workpiece may deteriorate the machining accuracy of the internal teeth. Therefore, when machining internal teeth with a gear skiving cutter, it is required to clean the inner peripheral surface of the workpiece over a wide range in the circumferential direction with a fluid.

The present invention has been devised in view of the above problems. By applying a fluid from a fluid discharge nozzle of a gear skiving cutter over a wide range in the circumferential direction of the inner peripheral surface of a workpiece, the inner teeth of the workpiece can be cut with high precision. To provide a gear machining device capable of creating

According to one aspect of the present invention, a gear skiving cutter is provided, and the rotation axis of the gear skiving cutter has a crossed-axis angle with respect to the rotation axis of the workpiece. A gear machining device that creates internal teeth on the inner peripheral surface of the workpiece by relatively moving the
The gear skiving cutter is
a cutting edge formed on the outer peripheral surface of the gear skiving cutter for machining the inner peripheral surface of the workpiece;
a fluid ejection nozzle configured by a shaft member, provided closer to the rotation axis of the gear skiving cutter than the cutting edge, and ejecting a fluid from the outer peripheral surface of the shaft member;
with
The fluid ejection nozzle is
a first discharge channel configured to discharge the fluid from a first opening in the outer peripheral surface of the fluid discharge nozzle;
a second discharge channel configured to discharge the fluid from a second opening in the outer peripheral surface of the fluid discharge nozzle;
with
The first discharge flow path is located at a position different from the machining point on the inner peripheral surface of the workpiece from the first opening at an angle at which the machining point is located in the circumferential direction of the inner peripheral surface of the workpiece. configured to eject said fluid towards
or The fluid is discharged from the second opening toward a position on the inner peripheral surface of the workpiece that is different in the axial direction of the workpiece from the position where the fluid is discharged from the first discharge channel. , in gear processing equipment.

According to the gear machining apparatus, the gear skiving cutter includes a fluid ejection nozzle that ejects fluid from the outer peripheral surface. The fluid ejection nozzle comprises a first ejection channel and a second ejection channel. The first discharge channel and the second discharge channel respectively discharge the fluid toward different positions in the circumferential direction of the inner peripheral surface of the workpiece at different angles at which the machining points are located. The first discharge channel and the second discharge channel are configured according to either the following first aspect or second aspect.

In the first aspect, the first discharge flow path directs the fluid toward a position different from the machining point on the inner peripheral surface of the workpiece at an angle at which the machining point is positioned in the circumferential direction of the inner peripheral surface of the workpiece. to dispense. A second discharge passage discharges fluid toward the cutting edge of the gear skiving cutter at an angle at which the machining point is positioned in the circumferential direction of the inner peripheral surface of the workpiece. Since the fluid discharged from the second discharge passage is discharged toward the cutting edge of the gear skiving cutter, it is applied to the vicinity of the machining point on the inner peripheral surface of the workpiece immediately after hitting the cutting edge. become. In other words, at the angle (phase) at which the machining point is positioned in the circumferential direction of the inner peripheral surface of the workpiece, the fluid discharged from the first discharge flow path is at a position different from the machining point on the inner peripheral surface of the workpiece. On the other hand, the fluid discharged from the second discharge channel is applied to the vicinity of the machining point on the inner peripheral surface of the workpiece.

Since the gear skiving cutter rotates around the rotation axis during machining, the fluid discharge nozzle also rotates around the rotation axis of the gear skiving cutter. Therefore, the first discharge flow path and the second discharge flow path also discharge the fluid toward a region other than the angle where the machining point is positioned in the circumferential direction of the gear skiving cutter. The fluid discharged from the second discharge channel is also directed to the cutting edge in areas other than the angle where the machining point is located. On the other hand, the fluid discharged from the first discharge channel is directed to a position different from the cutting edge in a region other than the angle where the machining point is positioned.

Therefore, in the circumferential direction of the inner peripheral surface of the workpiece, the fluid discharged from the second discharge flow path can be applied to the inner peripheral surface of the workpiece at the angle at which the machining point is positioned. In the circumferential direction of the inner peripheral surface of the workpiece W, even if the fluid discharged from the second discharge channel cannot be applied to the inner peripheral surface of the workpiece at an angle other than the machining point, The discharged fluid can be applied to the inner peripheral surface of the workpiece. Therefore, when machining internal teeth with a gear skiving cutter, even if the workpiece has a crossed axis angle, the inner peripheral surface of the workpiece can be cleaned over a wide range in the circumferential direction with the fluid.

In the second aspect, the first discharge flow path discharges the fluid toward a position of the workpiece different from the machining point at an angle at which the machining point is positioned in the circumferential direction of the inner peripheral surface of the workpiece. The position where the second discharge channel is discharged from the first discharge channel on the inner peripheral surface of the workpiece at the angle where the machining point is located in the circumferential direction of the inner peripheral surface of the workpiece is the axis of the workpiece. Discharge the fluid towards different locations in the direction. That is, at the angle at which the machining point is positioned in the circumferential direction of the inner peripheral surface of the workpiece, the fluid discharged from the first discharge flow path and the fluid discharged from the second discharge flow path It is applied to different positions on the peripheral surface in the axial direction of the workpiece.

Since the gear skiving cutter rotates around the rotation axis during machining, the fluid discharge nozzle also rotates around the rotation axis of the gear skiving cutter. Therefore, the first discharge flow path and the second discharge flow path also discharge the fluid toward a region other than the angle where the machining point is positioned in the circumferential direction of the gear skiving cutter. That is, the first discharge flow path and the second discharge flow path discharge the fluid toward different positions in the axial direction of the gear skiving cutter in a region other than the angle where the machining point is positioned.

Therefore, the fluid discharged from the second discharge channel can be applied to the inner peripheral surface of the workpiece at a certain angle in the circumferential direction of the inner peripheral surface of the workpiece. At another angle, even if the fluid discharged from the second discharge channel cannot be applied to the inner peripheral surface of the workpiece, the fluid discharged from the first discharge channel cannot be applied to the inner peripheral surface of the workpiece. can call. Therefore, when machining internal teeth with a gear skiving cutter, even if the workpiece has a crossed axis angle, the inner peripheral surface of the workpiece can be cleaned over a wide range in the circumferential direction with the fluid.

As described above, according to the above aspect, it is possible to create highly accurate internal teeth by applying the fluid from the fluid discharge nozzle of the gear skiving cutter over a wide range in the circumferential direction of the inner peripheral surface of the workpiece. It is possible to provide a gear machining device that can

It is a perspective view which shows a gear processing apparatus. FIG. 2 is a diagram showing a workpiece and a gear skiving cutter in a state of being machined in Embodiment 1, and is a diagram viewed from the axial direction of the workpiece. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2, further showing the fluid ejected from the fluid ejection nozzle; FIG. 3 is a cross-sectional view taken along line IV-IV of FIG. 2, further showing the fluid ejected from the fluid ejection nozzle; FIG. 5 is a view of the fluid ejection nozzle shown in FIG. 4 viewed from the V direction; FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2, further showing the fluid ejected from the fluid ejection nozzle, and showing a state in which the fluid ejection nozzle is rotated 180° with respect to the state of FIG. FIG. 5 is a cross-sectional view taken along line IV-IV of FIG. 2, further showing the fluid ejected from the fluid ejection nozzle, and showing a state in which the fluid ejection nozzle is rotated 180° with respect to the state of FIG. 4; (a) is a graph showing the behavior of the workpiece axis current value from the start to the end of machining; 4 is a graph showing the behavior of the workpiece shaft current value up to the end; FIG. 10 is a cross-sectional view showing the workpiece and the gear skiving cutter in a state of being machined in Embodiment 2, and is a cross-sectional view cut along the axial direction of the gear skiving cutter through the machining point. FIG. 10 is a cross-sectional view showing the workpiece and the gear skiving cutter in a state of being machined in Embodiment 2, and is a cross-sectional view cut in the axial direction of the gear skiving cutter through the machining point, with respect to the state of FIG. FIG. 10 is a diagram showing a state in which the fluid ejection nozzle is rotated 180°.

(Embodiment 1)
1. Configuration of Gear Machining Apparatus 1 The gear machining apparatus 1 will be described with reference to FIG. The gear machining apparatus 1 is a device that creates a tooth profile (gear teeth) on the workpiece W by the gear skiving cutter T by relatively moving the workpiece W and the gear skiving cutter T while rotating them. In particular, in this embodiment, the gear machining apparatus 1 creates internal teeth on the inner peripheral surface of the workpiece W as an example.

A general-purpose machine tool such as a machining center is applied to the gear machining apparatus 1 . The machining center is configured so that tools can be exchanged, and machining can be performed according to the attached tool. For example, replaceable gear cutting tools include a gear skiving cutter T, a hob cutter, a shaper cutter, and the like. By replacing it with a hob cutter or a shaper cutter, the gear machining apparatus 1 becomes an apparatus for machining a tooth profile (gear teeth) on the workpiece W by hobbing or shaper machining.

Examples of replaceable tools other than gear cutting tools include end mills, milling tools, drills, turning tools, thread cutting tools, and grinding tools. Note that FIG. 1 does not show a tool changer and a tool magazine for storing a plurality of tools.

Moreover, in this embodiment, the machining center as the gear machining apparatus 1 shown in FIG. 1 has a basic configuration of a horizontal machining center. However, the gear machining apparatus 1 can also apply other configurations, such as a vertical machining center.

As shown in FIG. 1, the gear machining apparatus 1 has, for example, three rectilinear drive axes (X-axis, Y-axis, Z-axis) that are orthogonal to each other. The gear machining apparatus 1 is configured such that a workpiece W and a gear skiving cutter T can be relatively moved in the X-axis direction, the Y-axis direction, and the Z-axis direction. Here, the direction parallel to the rotation axis Ct (equal to the rotation axis of the tool spindle) of the gear skiving cutter T is defined as the Z-axis direction, and the two axes orthogonal to the Z-axis direction are defined as the X-axis and the Y-axis. . In FIG. 1, the horizontal direction is the X-axis direction, and the vertical direction is the Y-axis direction.

Further, the gear machining apparatus 1 has one rotary drive shaft (rotary drive shaft around the B axis) for changing the relative posture between the workpiece W and the gear skiving cutter T. In this embodiment, the B-axis is an axis parallel to the Y-axis direction. Further, the gear machining apparatus 1 includes a rotary drive shaft for rotating the gear skiving cutter T (a rotary drive shaft around the Ct axis) and a rotary drive shaft for rotating the workpiece W (a rotary drive shaft around the Cw axis). drive shaft). In this embodiment, the rotation axis Ct of the gear skiving cutter T is always parallel to the Z-axis direction. The rotation axis Cw of the workpiece W is a horizontal axis, and can be angled with respect to the Z-axis direction and the X-axis direction according to the B-axis angle. However, the rotation axis Ct of the gear skiving cutter T may be configured to have an angle with respect to the Z-axis direction and the X-axis direction.

In the gear machining apparatus 1, the configuration for relatively moving the workpiece W and the gear skiving cutter T can be selected as appropriate. For example, the gear machining apparatus 1 may have an A-axis, which is a rotation axis parallel to the X-axis direction, instead of the B-axis. In the following, the gear machining apparatus 1 enables the gear skiving cutter T to move linearly in the Y-axis direction and the Z-axis direction, the workpiece W to move linearly in the X-axis direction, and the workpiece W to rotate around the B-axis. Let's take the case of making it rotatable.

A gear machining apparatus 1 includes a bed 10 , a workpiece holding device 20 , a tool holding device 30 and a control device 40 . The bed 10 is installed on an installation surface and formed into a shape corresponding to the shape of the workpiece holding device 20, the shape of the tool holding device 30, and the like. In this embodiment, the bed 10 has, for example, a rectangular shape. A pair of X-axis guide rails 11 extending in the X-axis direction and a pair of Z-axis guide rails 12 extending in the Z-axis direction are formed on the upper surface of the bed 10 .

The workpiece holding device 20 mainly includes an X-axis moving table 21 , a B-axis rotary table 22 and a workpiece spindle device 23 . The X-axis moving table 21 is driven by a driving device such as a linear motor or a ball screw mechanism (not shown) to move in the X-axis direction while being guided by the X-axis guide rails 11 of the bed 10 .

The B-axis rotary table 22 is installed on the upper surface of the X-axis moving table 21 and moves integrally with the X-axis moving table 21 in the X-axis direction. Also, the B-axis rotary table 22 is provided rotatably around the B-axis with respect to the X-axis moving table 21 . The B-axis rotary table 22 is provided with a rotary motor and a rotation angle detector (not shown), and the B-axis rotary table 22 is rotatable about the B-axis by driving the rotary motor.

The workpiece spindle device 23 is provided on the B-axis rotary table 22 and rotates integrally with the B-axis rotary table 22 around the B-axis. The workpiece spindle device 23 holds the workpiece W rotatably. The workpiece spindle device 23 is provided with a rotary motor and a rotation angle detector (not shown), and the workpiece spindle device 23 is driven by the rotary motor to rotate the workpiece W around the Cw axis. In this manner, the workpiece holding device 20 allows the workpiece W to move in the X-axis direction, rotate about the B-axis, and rotate about the Cw-axis with respect to the bed 10 .

Specifically, the workpiece spindle device 23 includes a housing 23a and a spindle 23b. A housing 23a of the workpiece spindle device 23 is fixed to the B-axis rotary table 22, and a spindle 23b of the workpiece spindle device 23 is rotatably supported by the housing 23a. A workpiece W is attached to the tip of the spindle 23b. That is, the workpiece W is cantilevered on the spindle 23 b of the workpiece spindle device 23 . In this embodiment, since the inner peripheral surface of the workpiece W is machined, the main spindle 23b of the workpiece spindle device 23 holds the outer peripheral surface of the workpiece W. As shown in FIG.

The tool holding device 30 mainly includes a column 31 , a saddle 32 and a tool spindle device 33 . The column 31 moves in the Z-axis direction while being guided by the Z-axis guide rails 12 of the bed 10 by being driven by a driving device such as a linear motor or a ball screw mechanism (not shown). A Y-axis guide rail 31a is formed on the side surface (left side in FIG. 1) of the column 31 extending in the vertical direction. The saddle 32 moves in the Y-axis direction while being guided by the Y-axis guide rails 31a of the column 31 by being driven by a driving device such as a linear motor or a ball screw mechanism (not shown).

The tool spindle device 33 is provided on the saddle 32 and moves together with the saddle 32 in the Y-axis direction. The tool spindle device 33 holds the gear skiving cutter T. As shown in FIG. The tool spindle device 33 is provided with a rotary motor and a rotation angle detector (not shown), and the tool spindle device 33 can rotate the gear skiving cutter T around the Ct axis by driving the rotary motor. In this manner, the tool holding device 30 holds the gear skiving cutter T so that it can move in the Y-axis direction and the Z-axis direction with respect to the bed 10 and can rotate about the Ct axis.

Specifically, the tool spindle device 33 includes a housing 33a and a spindle 33b. A housing 33a of the tool spindle device 33 is fixed to the saddle 32, and a spindle 33b of the tool spindle device 33 is rotatably supported by the housing 33a. A gear skiving cutter T is attached to the tip of the main shaft 33b. That is, the gear skiving cutter T is cantilevered on the spindle 33b of the tool spindle device 33. As shown in FIG. Further, in the present embodiment, a flow path (not shown) passing through the spindle 33b of the tool spindle device 33 in the axial direction, that is, a flow path through which a fluid, which is an aqueous coolant solution, flows is formed. That is, the main shaft 33b has a through-coolant structure.

The control device 40 includes a processor (arithmetic processing device) and a storage device, and controls each drive device by executing a machining program. That is, the control device 40 controls rotation of the gear skiving cutter T about the Ct axis, rotation of the work W about the Cw axis, relative movement between the work W and the gear skiving cutter T, and the like.

Specifically, the control device 40 causes the rotation axis Ct of the gear skiving cutter T to have a crossed-axis angle α with respect to the rotation axis Cw of the workpiece W. As shown in FIG. In this embodiment, the control device 40 rotates the B-axis rotary table 22 to position the workpiece W and the gear skiving cutter T so that they have the crossed axis angle α. The control device 40 moves the gear skiving cutter T relative to the workpiece W in the axial direction of the workpiece W while rotating the workpiece W and the gear skiving cutter T synchronously. Create internal teeth on the inner peripheral surface of W.

2. Configuration of Gear Skiving Cutter T The configuration of the gear skiving cutter T will be described with reference to FIGS. 2 to 5. FIG. The gear skiving cutter T is a tool for creating internal teeth on the inner peripheral surface of the workpiece W. As shown in FIG. The gear skiving cutter T includes a cutter body 50 , a fluid discharge nozzle 60 and an adjustment collar 70 . In this embodiment, the gear skiving cutter T has an example in which the cutter body 50, the fluid discharge nozzle 60 and the adjustment collar 70 are separate members, but these may be integrally formed as one member.

The cutter main body 50 is mounted on the spindle 33b (shown in FIG. 1) of the tool spindle device 33 and rotates integrally with the spindle 33b. The cutter body 50 includes a spindle mounting portion 51 and a plurality of cutting blades 52 .

The spindle mounting portion 51 is detachably provided at the tip of the spindle 33b. As shown in FIG. 4, the main shaft mounting portion 51 is formed with a flow passage 51a penetrating in the direction of the rotation axis Ct of the gear skiving cutter T in the central portion thereof. The channel 51a of the spindle mounting portion 51 communicates with a channel (not shown) formed in the center of the spindle 33b. Accordingly, the fluid (aqueous coolant solution) that flows through the flow path of the main shaft 33b flows through the flow path 51a in the main shaft mounting portion 51 of the cutter body 50. As shown in FIG. A female thread is formed on the inner peripheral surface of the cutter main body 50 on the distal end side in the flow path 51a.

Further, as shown in FIG. 4, the spindle mounting portion 51 is formed with a recess 51b on the tip surface side (left side in FIG. 4) of the cutter body 50 (corresponding to the tip surface side of the gear skiving cutter T). there is The recess 51b communicates with the flow path 51a, and the inner diameter of the recess 51b is formed to be larger than the inner diameter of the flow path 51a.

A plurality of cutting edges 52 are formed on the outer peripheral surface of the cutter body 50 (corresponding to the outer peripheral surface of the gear skiving cutter T) and are blades for machining the inner peripheral surface of the workpiece W. As shown in FIG. A plurality of cutting blades 52 are arranged in the circumferential direction of the cutter body 50 . In this embodiment, the plurality of cutting edges 52 are formed at equal intervals in the circumferential direction as an example, but they may be formed at unequal intervals by providing cut edges.

The plurality of cutting edges 52 may be formed so as to have a positive or negative helix angle with respect to the rotation axis Ct of the gear skiving cutter T, or may be formed parallel (when the helix angle is zero). . The helix angle of the cutting edge 52 is determined by the helix angle of the internal teeth of the workpiece W, the axis crossing angle α between the rotation axis Cw of the workpiece W and the rotation axis Ct of the gear skiving cutter T among the machining conditions. .

Each of the plurality of cutting edges 52 has a rake face 52a on the axial end face of the cutter body 50, a front relief face 52b on the outer peripheral face of the cutter body 50, and a side relief face normal to the circumferential direction of the cutter body 50. 52c. In this embodiment, the rake face 52a of the cutting edge 52 is formed to have a positive rake angle, but can be set to have an arbitrary rake angle.

The front flank 52b of the cutting edge 52 is formed to be inclined with respect to the rotation axis Ct of the gear skiving cutter T, that is, to be positioned on a conical surface. That is, the front clearance surface 52b of the cutting edge 52 has a positive front clearance angle. However, the front flank 52b of the cutting edge 52 may be formed parallel to the rotational axis Ct of the gear skiving cutter T, that is, positioned on the cylindrical surface. That is, the circumscribed surfaces of the plurality of cutting edges 52 may be formed into conical surfaces or cylindrical surfaces. A side flank 52c of the cutting edge 52 is formed so as to be inclined with respect to the tooth trace direction of the cutting edge 52 . That is, the side relief surface 52c of the cutting edge 52 has a positive side relief angle.

In the following, in the axial direction of the gear skiving cutter T, the side of the rake face 52a of the cutting edge 52 (the left side in FIG. 4) is the front side, and the back side of the rake face 52a of the cutting edge 52 (the right side in FIG. 4) is the rear side. and

The fluid ejection nozzle 60 is configured by a shaft member. The outer shape of the fluid ejection nozzle 60 is, for example, similar to the shape of a hexagonal bolt. However, the external shape of the fluid discharge nozzle can be various shapes such as a bolt shape with a cylindrical head, a bolt shape without a head, and a shaft member without a male thread.

In this embodiment, the fluid discharge nozzle 60 includes a small-diameter shaft portion 61 and a large-diameter head portion 62 provided coaxially with the small-diameter shaft portion 61, as shown in FIG. The outer peripheral surface of the small-diameter shaft portion 61 is formed with a male thread that can be screwed into the female thread of the flow path 51 a of the cutter body 50 . A portion of the small-diameter shaft portion 61 in the axial direction is inserted forward of the flow path 51a of the cutter body 50 and screwed into the internal thread of the flow path 51a. In this manner, the fluid discharge nozzle 60 is provided integrally with the cutter body 50 closer to the rotation axis Ct of the gear skiving cutter T than the cutting edge 52 of the cutter body 50 . The central axis of the cutter body 50 and the central axis of the fluid discharge nozzle 60 are coaxial and are provided so as to coincide with the rotation axis Ct of the gear skiving cutter T. As shown in FIG.

A portion of the large-diameter head portion 62 of the fluid discharge nozzle 60 is accommodated in the recess 51b of the cutter body 50, and the remaining portion of the large-diameter head portion 62 is located on the tip surface of the cutter body 50 in the axial direction. It protrudes forward in the axial direction (outward in the axial direction).

The fluid discharge nozzle 60 circulates fluid from a flow path (not shown) formed in the center of the main shaft 33b through the flow path 51a of the main shaft mounting portion 51 of the cutter main body 50 to the outer peripheral surface of the shaft member. is configured to discharge radially outward from the

Specifically, as shown in FIGS. 4 and 5, the fluid discharge nozzle 60 includes a central channel 63, a first discharge channel 64, and a second discharge channel 65. As shown in FIG. The central flow path 63 is formed in the center of the fluid ejection nozzle 60 so as to extend in the axial direction of the fluid ejection nozzle 60 . The rear end (right side in FIG. 4) of the central flow path 63, that is, the axial end of the portion inserted into the flow path 51a of the cutter body 50 is open. On the other hand, the front end (left side in FIG. 4) of the central channel 63 is closed. That is, the central flow path 63 is formed over the entire length of the small-diameter shaft portion 61 and is formed in a portion of the large-diameter head portion 62 .

The first discharge channel 64 is formed in the large-diameter head portion 62 so as to extend in the radial direction. The first discharge channel 64 is formed in the large-diameter head portion 62 so as to communicate between the central channel 63 and the first opening 64 a on the outer peripheral surface of the large-diameter head portion 62 . Therefore, the first discharge flow path 64 is configured to discharge the fluid supplied from the flow path 51a of the cutter main body 50 through the first opening 64a. 3 and 4, the fluid discharged from the first discharge flow path 64 is assumed to be F1.

A plurality of first discharge flow paths 64 are provided as shown in FIG. In FIG. 5, for example, three first discharge flow paths 64 are formed in the circumferential direction. However, the number of the first discharge passages 64 is not limited to three, and may be one, two, four or more. Further, in the present embodiment, the first discharge passages 64 are preferably formed at regular intervals (120° intervals) in the circumferential direction, but may be formed at irregular intervals. The first discharge flow path 64 is formed near the center in the circumferential direction on each plane of the outer peripheral surface of the large-diameter head portion 62 from the viewpoint of ease of manufacture.

As shown in FIG. 4, the first discharge passage 64 is configured to discharge the fluid F1 radially outward of the fluid discharge nozzle 60 in the axial cross section of the fluid discharge nozzle 60. there is Further, the first discharge flow path 64 is configured to discharge the fluid F1 in a direction inclined forward with respect to the direction perpendicular to the axis of the fluid discharge nozzle 60 toward the outer side in the radial direction of the fluid discharge nozzle 60. . The forward inclination angle of the first discharge channel 64 is β1.

Here, the direction orthogonal to the axis of the fluid ejection nozzle 60 is the direction radially outward of the fluid ejection nozzle 60 in the axial cross section of the fluid ejection nozzle 60, and is perpendicular to the rotation axis Ct of the gear skiving cutter T. direction. Further, in the axial cross section of the fluid ejection nozzle 60 , the direction toward the radially outer side of the fluid ejection nozzle 60 and the direction perpendicular to the axis of the fluid ejection nozzle 60 is the direction toward the front in the radially outer direction of the fluid ejection nozzle 60 . The direction tilted by the intersection angle α (shown in FIG. 3) is defined as the reference forward tilt direction.

The forward inclination angle β1 of the first discharge passage 64 is preferably matched with the crossed axis angle α. However, the forward inclination angle β1 of the first discharge passage 64 may be closer to the crossed-axis angle α than 0°. In other words, the first discharge flow path 64 is configured to discharge the fluid F1 in a direction closer to the reference forward tilt direction than the direction orthogonal to the axis of the fluid discharge nozzle 60 in the axial cross section of the fluid discharge nozzle 60. and good.

The second discharge channel 65 is formed in the large-diameter head portion 62 so as to extend in the radial direction. The second discharge channel 65 is formed in the large-diameter head portion 62 so as to communicate the central channel 63 and the second opening 65 a on the outer peripheral surface of the large-diameter head portion 62 . Therefore, the second discharge flow path 65 is configured to discharge the fluid supplied from the flow path 51a of the cutter body 50 through the second opening 65a. 3 and 4, the fluid discharged from the second discharge channel 65 is assumed to be F2.

As shown in FIG. 5, a plurality of second discharge flow paths 65 are provided in the circumferential direction. In FIG. 5, the second discharge flow paths 65 are formed at three locations. However, the number of the second discharge passages 65 is not limited to three, and may be one, two, four or more. Further, in this embodiment, the second discharge passages 65 are preferably formed at regular intervals (120° intervals) in the circumferential direction, but may be formed at irregular intervals. The second discharge flow path 65 is formed near the center in the circumferential direction on each plane of the outer peripheral surface of the large-diameter head portion 62 from the viewpoint of ease of manufacture. Each of the plurality of second discharge flow paths 65 is provided between the circumferentially adjacent first discharge flow paths 64 . That is, the first ejection channels 64 and the second ejection channels 65 are alternately arranged in the circumferential direction of the fluid ejection nozzle 60 .

As shown in FIG. 4, the second discharge flow path 65 is configured to discharge the fluid F2 radially outward of the fluid discharge nozzle 60 in the axial cross section of the fluid discharge nozzle 60. there is Further, the second discharge flow path 65 is configured to discharge the fluid F2 in a direction inclined rearward toward the radially outer side of the fluid discharge nozzle 60 with respect to the direction perpendicular to the axis of the fluid discharge nozzle 60. . The backward inclination angle of the second discharge channel 65 is β2. In this manner, the first discharge flow path 64 and the second discharge flow path 65 are configured to have different angles with respect to the rotation axis Ct of the gear skiving cutter T in the axial cross section of the fluid discharge nozzle 60. there is

The rearward inclination angle β2 of the second discharge flow path 65 is 0° or more, and is preferably equal to or less than the crossed axis angle α. However, the second discharge flow path 65 may be inclined forward. In this case, the inclination angle (not shown) of the second discharge flow path 65 is smaller than the forward inclination angle β1 of the first discharge flow path 64 . That is, the second discharge flow path 65 is configured to discharge the fluid F2 in a direction closer to the direction orthogonal to the axis of the fluid discharge nozzle 60 than the reference forward tilt direction in the axial cross section of the fluid discharge nozzle 60. good.

The adjustment collar 70 is cylindrically formed. The adjustment collar 70 is sandwiched between the bottom surface of the recess 51 b of the cutter body 50 and the axial end surface of the large-diameter head portion 62 of the fluid discharge nozzle 60 . By adjusting the axial length of the adjustment collar 70, the axial position of the fluid discharge nozzle 60 with respect to the cutter body 50 can be adjusted. In other words, the adjustment collar 70 can adjust the position of the first opening 64 a of the first discharge channel 64 and the position of the second opening 65 a of the second discharge channel 65 of the fluid discharge nozzle 60 .

3. 2. Gear Skiving Gear skiving for creating internal teeth on the inner peripheral surface of the workpiece W by the gear skiving cutter T will be described with reference to FIGS. 2 to 7. FIG. Under the control of the control device 40, as shown in FIG. 3, the rotation axis Ct of the gear skiving cutter T and the rotation axis Cw of the workpiece W are in a state of having a crossed axis angle α. Furthermore, under the control of the control device 40, the gear skiving cutter T is moved relative to the workpiece W in the axial direction of the workpiece W while rotating the workpiece W and the gear skiving cutter T synchronously. In this manner, internal teeth are created on the inner peripheral surface of the workpiece W. As shown in FIG.

When gear skiving is performed, a fluid (aqueous coolant solution) is supplied to the flow path (not shown) of the main shaft 33b. Then, the fluid is discharged from the outer peripheral surface of the large-diameter head portion 62 of the fluid discharge nozzle 60 .

The first discharge passage 64 is formed in the fluid discharge nozzle 60 as described above. Accordingly, the fluid F<b>1 is discharged from the first opening 64 a of the first discharge flow path 64 . As shown in FIG. 4, the first discharge passage 64 extends from the first opening 64a to the inner peripheral surface of the workpiece W at an angle at which the processing point P is located in the circumferential direction of the inner peripheral surface of the workpiece W. It is configured to discharge the fluid F1 toward a position different from the processing point P.

When the first discharge passage 64 is located at an angle rotated by 180° from the processing point P in the circumferential direction of the inner peripheral surface of the workpiece W, as shown in FIG. Among them, the fluid F1 is discharged toward a position farther forward. As the machining of the workpiece W by the gear skiving cutter T progresses, the first discharge flow path 64 moves not on the inner peripheral surface of the workpiece W but on the front outside of the workpiece W at an angle rotated by 180° from the machining point P. can be in a state of discharging the fluid F1 toward.

As shown in FIGS. 3 and 6, when the first discharge flow path 64 is positioned at an angle other than the angle of the processing point P and rotated by 180° from the processing point P, the case of FIG. 3 and the case of FIG. The fluid F1 is discharged in the axial direction between the case of .

In addition to the first discharge channel 64 , the second discharge channel 65 is formed in the fluid ejection nozzle 60 as described above. Therefore, the fluid F2 is discharged from the second opening 65a of the second discharge channel 65. As shown in FIG. As shown in FIG. 4, the second discharge flow path 65 discharges the fluid F2 from the second opening 65a toward the cutting edge 52 at the angle at which the processing point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W. It is configured to discharge a portion. Further, the second discharge flow path 65 extends from the second opening 65a to the first discharge flow path on the inner peripheral surface of the workpiece W at an angle where the processing point P is located in the circumferential direction of the inner peripheral surface of the workpiece W. It is configured to discharge a portion of the fluid F2 toward a position in the axial direction of the workpiece W that is different from the position discharged from 64 .

In this way, part of the fluid F2 discharged from the second opening 65a of the second discharge flow path 65 hits the cutting edge 52 and scatters around the cutting edge 52 . In particular, a portion of the fluid F2 is positioned so as to be discharged toward the rake face 52a of the cutting edge 52. As shown in FIG. Another portion of the fluid F2 discharged from the second opening 65a of the second discharge flow path 65 directly hits the inner peripheral surface of the workpiece W without hitting the cutting edge 52. As shown in FIG. However, depending on the position of the gear skiving cutter T with respect to the workpiece W, part of the fluid F2 may be discharged toward the outside of the workpiece W rather than toward the inner peripheral surface of the workpiece W.

When the second discharge flow path 65 is positioned at an angle rotated by 180° from the processing point P in the circumferential direction of the inner peripheral surface of the workpiece W, as shown in FIG. The fluid F1 is discharged toward the outside behind the workpiece W without any movement. However, the second discharge passage 65 may discharge toward the inner peripheral surface of the workpiece W at an angle rotated from the processing point P by 180°. Then, as the machining of the workpiece W by the gear skiving cutter T progresses, the second discharge flow path 65 moves to a rearward position on the inner peripheral surface of the workpiece W at an angle rotated by 180° from the machining point P. , the fluid F2 is discharged.

As shown in FIGS. 3 and 6, when the second discharge flow path 65 is positioned at an angle other than the angle of the processing point P and rotated by 180° from the processing point P, the case of FIG. 3 and the state of FIG. The fluid F2 is discharged in the axial direction between the case of .

4. Effect of Embodiment 1 In the gear machining apparatus 1 of Embodiment 1, the gear skiving cutter T includes the fluid discharge nozzle 60 . The fluid ejection nozzle 60 has a first ejection passage 64 configured to eject the fluid F1 from a first opening 64a on the outer peripheral surface of the fluid ejection nozzle 60, and a second opening 65a on the outer peripheral surface of the fluid ejection nozzle 60. a second discharge channel 65 configured to discharge fluid F2.

The first discharge flow path 64 and the second discharge flow path 65 respectively direct the fluids F1 and F2 toward different positions at an angle at which the processing point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W. to dispense.

Specifically, as shown in FIG. 4, the first discharge flow path 64 extends from the first opening 64a to the workpiece W at an angle at which the processing point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W. The fluid F1 is discharged toward a position different from the processing point P on the inner peripheral surface of the.

As shown in FIG. 7, the second discharge passage 65 discharges the fluid F1 from the second opening 65a toward the cutting edge 52 at an angle at which the processing point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W. configured to dispense. In addition, the second discharge flow path 65 is directed from the second opening 65a to a position on the inner peripheral surface of the workpiece W that is different in the axial direction of the workpiece W from the position where the first discharge flow path 64 discharges. It is configured to discharge fluid F2.

In Embodiment 1, the second discharge flow path 65 discharges part of the fluid F2 toward the cutting edge 52 and discharges another part of the fluid F2 toward the inner peripheral surface of the workpiece W. As shown in FIG. However, the second discharge flow path 65 may discharge all of the fluid F2 toward the cutting edge 52 . In addition, the second discharge channel 65 directs all of the fluid F2 toward a position in the axial direction of the workpiece W that is different from the position where the fluid F2 is discharged from the first discharge channel 64 on the inner peripheral surface of the workpiece W. You may make it discharge.

In other words, as a first mode, the first discharge flow path 64 is positioned at the angle at which the processing point P is located in the circumferential direction of the inner peripheral surface of the workpiece W, and the processing point P on the inner peripheral surface of the workpiece W. eject fluid F1 towards different locations. On the other hand, the second discharge flow path 65 discharges the fluid F2 toward the cutting edge 52 of the gear skiving cutter T at an angle where the processing point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W. Since the fluid F2 discharged from the second discharge passage 65 is discharged toward the cutting edge 52 of the gear skiving cutter T, immediately after hitting the cutting edge 52, the inner peripheral surface of the workpiece W It will be in the vicinity of the processing point P. In other words, at an angle (phase) at which the machining point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W, the fluid F1 discharged from the first discharge flow path 64 reaches the machining point on the inner peripheral surface of the workpiece W. The fluid F2 discharged from the second discharge flow path 65 is applied to the vicinity of the processing point P on the inner peripheral surface of the workpiece W, while the fluid F2 is applied to a position different from P.

Since the gear skiving cutter T rotates about the rotation axis Ct during machining, the fluid discharge nozzle 60 also rotates about the rotation axis Ct of the gear skiving cutter T. As shown in FIG. Therefore, the first discharge flow path 64 and the second discharge flow path 65 can discharge the fluids F1 and F2 toward regions other than the angle at which the processing point P is positioned in the circumferential direction of the gear skiving cutter T. Become. The fluid F2 discharged from the second discharge flow path 65 is also directed to the cutting edge 52 in a region other than the angle where the processing point P is positioned. On the other hand, the fluid F1 discharged from the first discharge flow path 64 is directed to a position different from the cutting edge 52 in a region other than the angle where the processing point P is positioned.

Therefore, in the circumferential direction of the inner peripheral surface of the workpiece W, the fluid F2 discharged from the second discharge flow path 65 can be applied to the inner peripheral surface of the workpiece W at the angle at which the processing point P is positioned. In the circumferential direction of the inner peripheral surface of the workpiece W, even if the fluid F2 discharged from the second discharge flow path 65 cannot be applied to the inner peripheral surface of the workpiece W at an angle other than the processing point P, the first The fluid F1 discharged from the discharge channel 64 can be applied to the inner peripheral surface of the workpiece W. As shown in FIG. Therefore, when machining internal teeth with the gear skiving cutter T, even if the crossed axes angle α is present, the inner peripheral surface of the workpiece W can be cleaned over a wide range in the circumferential direction with the fluid.

As a second aspect, the first discharge flow path 64 is directed toward a position on the workpiece W different from the machining point P at an angle at which the machining point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W. Fluid F1 is discharged. A position where the second discharge channel 65 is discharged from the first discharge channel 64 on the inner peripheral surface of the workpiece W at an angle where the processing point P is located in the circumferential direction of the inner peripheral surface of the workpiece W. discharge fluid F2 towards different axial positions of the workpiece W; That is, the fluid F1 discharged from the first discharge channel 64 and the fluid F2 discharged from the second discharge channel 65 at the angle at which the processing point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W are They are located at different positions on the inner peripheral surface of the workpiece W in the axial direction of the workpiece W, respectively.

Since the gear skiving cutter T rotates about the rotation axis Ct during machining, the fluid discharge nozzle 60 also rotates about the rotation axis Ct of the gear skiving cutter T. As shown in FIG. Therefore, the first discharge flow path 64 and the second discharge flow path 65 can discharge the fluids F1 and F2 toward regions other than the angle at which the processing point P is positioned in the circumferential direction of the gear skiving cutter T. Become. That is, the first discharge flow path 64 and the second discharge flow path 65 discharge the fluids F1 and F2 toward different positions in the axial direction of the gear skiving cutter T in a region other than the angle at which the processing point P is positioned. .

Therefore, in the circumferential direction of the inner peripheral surface of the workpiece W, the fluid F2 discharged from the second discharge flow path 65 can be applied to the inner peripheral surface of the workpiece W at a certain angle. At another angle, even if the fluid F2 discharged from the second discharge channel 65 cannot be applied to the inner peripheral surface of the workpiece W, the fluid F1 discharged from the first discharge channel 64 can be applied to the workpiece W. It can be applied to the inner peripheral surface of W. Therefore, when machining the internal teeth by the gear skiving cutter T, even if the crossed axes angle α is present, the inner peripheral surface of the workpiece W can be washed over a wide range in the circumferential direction with the fluids F1 and F2. can.

Therefore, by applying the fluids F1 and F2 from the fluid discharge nozzle 60 of the gear skiving cutter T over a wide range in the circumferential direction of the inner peripheral surface of the workpiece W, highly accurate internal teeth can be created.

This effect will be described with reference to FIGS. FIG. 8A is a graph showing the current value of the spindle motor of the workpiece spindle device 23 over time during gear skiving machining when the first embodiment is applied. The current value of the spindle motor of the workpiece spindle device 23 corresponds to the load that the workpiece W receives during machining.

FIG. 8(b) is a graph for a configuration corresponding to the prior art. In other words, FIG. 8(b) shows, in the configuration in which the fluid discharge nozzle 60 has the first discharge flow path 64 replaced with the second discharge flow path 65, the main shaft motor of the workpiece spindle device 23 over time during the gear skiving machining. is a graph showing the current value of

As shown in FIGS. 8A and 8B, the current value increases when machining starts, and the current value decreases when machining ends. The magnitude of the variation in the current value during machining is large in FIG. 8(b), whereas it is small in FIG. 8(a). In particular, in FIG. 8A, the variation in the current value during machining is stable, while in FIG. It's getting smaller.

In the first half of machining in FIG. 8(b), it is considered that the biting of chips had an effect. On the other hand, as shown in FIG. 8(a), by configuring the gear machining apparatus 1 as in the first embodiment, it is possible to enhance the cleaning effect of chips and reduce biting of chips in the first half of machining. It is thought that

Further, according to the configuration of Embodiment 1, as shown in FIG. They are configured to have different angles with respect to the axis Ct. Thereby, the fluids F1 and F2 can be reliably discharged toward a desired position. Furthermore, the axial length of the large-diameter head portion 62 of the fluid ejection nozzle 60 can be shortened. That is, the amount by which the fluid ejection nozzle 60 protrudes forward from the cutter main body 50 can be reduced. As a result, interference with other members can be suppressed, so that the degree of freedom in designing the other members can be increased.

In addition, as shown in FIG. 4, the first discharge flow path 64 is inclined forward by a reference forward inclination direction (axis crossing angle α It is configured to discharge the fluid F1 in a direction close to the direction in which the fluid F1 is drawn. On the other hand, the second discharge flow path 65 is configured to discharge the fluid F2 in a direction closer to the axis-perpendicular direction than the reference forward tilt direction in the axial cross section of the fluid discharge nozzle 60 . As a result, particularly in the initial stage of machining, the inner peripheral surface of the workpiece W can be cleaned over a wide range in the circumferential direction by the fluids F1 and F2.

Further, as shown in FIG. 4, the second discharge passage 65 discharges the fluid F2 in a direction inclined rearward toward the radially outer side of the fluid discharge nozzle 60 in the axial cross section of the fluid discharge nozzle 60. is configured to As a result, the fluid F<b>2 discharged from the second discharge flow path 65 can be reliably aimed at the rake face 52 a of the cutting edge 52 . Therefore, cleaning at the most important processing point P can be reliably performed.

A plurality of the first discharge flow paths 64 and the second discharge flow paths 65 are provided in the circumferential direction of the fluid discharge nozzle 60, and the first discharge flow paths 64 and the second discharge flow paths 65 are configured to They are arranged alternately in the circumferential direction of the nozzles 60 . Since the fluid discharge nozzle 60 constitutes a part of the gear skiving cutter T, it rotates together with the cutter body 50 of the gear skiving cutter T. As shown in FIG. Due to the different discharge directions of the fluids F1 and F2, the discharge of the fluids F1 and F2 may cause rotational imbalance. However, since the first discharge flow paths 64 and the second discharge flow paths 65 are alternately formed in the circumferential direction, it is possible to suppress the occurrence of rotational imbalance. In particular, the angles of the adjacent first discharge flow path 64 and the second discharge flow path 65 are made equal. As a result, it is possible to more effectively suppress the occurrence of rotational imbalance.

(Embodiment 2)
A gear machining apparatus 1 of Embodiment 2 will be described with reference to FIGS. 9 and 10. FIG. The gear machining apparatus 1 of the second embodiment differs from the first embodiment only in the direction of the first discharge flow path 64 and the direction of the second discharge flow path 65 of the fluid discharge nozzle 60 . It should be noted that, of the reference numerals used in Embodiment 2, the same reference numerals as those used in the above-described embodiments represent the same components and the like as those in the above-described embodiments unless otherwise specified.

As shown in FIGS. 9 and 10, the first discharge passage 64 and the second discharge passage 65 have the same angle with respect to the rotation axis Ct of the gear skiving cutter T in the axial cross section of the fluid discharge nozzle 60. is configured as In particular, in this embodiment, the first discharge flow path 64 and the second discharge flow path 65 are arranged in a direction perpendicular to the rotation axis Ct of the gear skiving cutter T in the axial cross section of the fluid discharge nozzle 60. is configured to

The first opening 64 a and the second opening 65 a are formed at different positions in the axial direction of the fluid ejection nozzle 60 . That is, the first discharge flow path 64 and the second discharge flow path 65 are formed at different positions in the axial direction of the fluid discharge nozzle 60 .

Also in the second embodiment, as in the first embodiment, as shown in FIG. 9, the first discharge flow path 64 is arranged at the angle at which the processing point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W. It is configured to discharge the fluid F1 toward a position different from the processing point P on the inner peripheral surface of the workpiece W from the one opening 64a. As shown in FIG. 10, the second discharge passage 65 directs the fluid F2 from the second opening 65a toward the cutting edge 52 at an angle at which the processing point P is positioned in the circumferential direction of the inner peripheral surface of the workpiece W. The fluid F2 is discharged from the second opening 65a toward a position different in the axial direction of the workpiece W from the position discharged from the first discharge passage 64 on the inner peripheral surface of the workpiece W. is configured to Also in the second embodiment, the same effect as in the first embodiment is exhibited.

1 Gear processing device 52 Cutting edge 60 Fluid discharge nozzle 64 First discharge channel 64a First opening 65 Second discharge channel 65a Second opening F1, F2 Fluid P Machining point T Gear skiving cutter W Workpiece Cw Workpiece Rotation axis Ct Rotation axis of gear skiving cutter α Crossed axis angle

Claims (6)

A gear skiving cutter is provided, and the gear skiving cutter is relatively moved in the axial direction of the workpiece with the rotation axis of the gear skiving cutter having a crossed axis angle with respect to the rotation axis of the workpiece, A gear machining device for generating internal teeth on the inner peripheral surface of the workpiece,
The gear skiving cutter is
a cutting edge formed on the outer peripheral surface of the gear skiving cutter for machining the inner peripheral surface of the workpiece;
a fluid ejection nozzle configured by a shaft member, provided closer to the rotation axis of the gear skiving cutter than the cutting edge, and ejecting a fluid from the outer peripheral surface of the shaft member;
with
The fluid ejection nozzle is
a first discharge channel configured to discharge the fluid from a first opening in the outer peripheral surface of the fluid discharge nozzle;
a second discharge channel configured to discharge the fluid from a second opening in the outer peripheral surface of the fluid discharge nozzle;
with
The first discharge flow path is located at a position different from the machining point on the inner peripheral surface of the workpiece from the first opening at an angle at which the machining point is located in the circumferential direction of the inner peripheral surface of the workpiece. configured to eject said fluid towards
or The fluid is discharged from the second opening toward a position on the inner peripheral surface of the workpiece that is different in the axial direction of the workpiece from the position where the fluid is discharged from the first discharge channel. , gear processing equipment. 2. The first discharge flow path and the second discharge flow path are configured to have different angles with respect to the rotation axis of the gear skiving cutter in an axial cross section of the fluid discharge nozzle. The gear processing device according to . In the axial direction of the gear skiving cutter, the rake face side of the cutting edge is the front side, and the back side of the rake face of the cutting edge is the rear side,
In an axial cross section of the fluid ejection nozzle, a direction that is radially outward of the fluid ejection nozzle and that is perpendicular to the rotation axis of the gear skiving cutter is defined as an axial orthogonal direction,
In an axial cross-section of the fluid ejection nozzle, the radially outer direction of the fluid ejection nozzle is a direction toward the radially outer side of the fluid ejection nozzle, and the radially outer side of the fluid ejection nozzle is inclined forward by the crossed-axis angle with respect to the axial orthogonal direction. The direction in which the
The first discharge flow path is configured to discharge the fluid in a direction closer to the reference forward tilt direction than the direction perpendicular to the axis in an axial cross section of the fluid discharge nozzle,
3. The second discharge passage according to claim 2, wherein said second discharge passage is configured to discharge said fluid in a direction closer to said axis-perpendicular direction than said reference forward inclined direction in an axial cross-section of said fluid discharge nozzle. Gear processing equipment. 4. The method according to claim 3, wherein the second discharge passage is configured to discharge the fluid in a direction inclined rearward toward the radially outer side of the fluid discharge nozzle in an axial cross section of the fluid discharge nozzle. Gear processing device as described. The first discharge flow path and the second discharge flow path are configured to have the same angle with respect to the rotation axis of the gear skiving cutter in the axial cross section of the fluid discharge nozzle,
2. The gear machining apparatus according to claim 1, wherein said first opening and said second opening are formed at different positions in the axial direction of said fluid discharge nozzle. A plurality of the first discharge flow path and the second discharge flow path are provided in the circumferential direction of the fluid discharge nozzle,
The gear machining apparatus according to any one of claims 1 to 5, wherein the first discharge flow path and the second discharge flow path are alternately arranged in the circumferential direction of the fluid discharge nozzle.

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