JP2021154443A - Skiving processor - Google Patents

Abstract

To supply a cutting liquid evenly to a skiving cutter, thereby suppressing wear of the skiving cutter.SOLUTION: A skiving processor comprises: a holder 11; a collar part 12 connected to the holder 11; an adapter part 13 which fits to an inner periphery of a wall part 12d of the collar part 12; and a cutter part 14 attached to the adapter part 13. The holder 11 has, in the holder 11, a central flow channel 11c which flows a fluid in an extension direction of the holder 11, a branch flow channel 11d which flows the fluid from the central flow channel 11c to radial direction outer side of the holder 11. The collar part 12 has an annular flow channel 12c which flows the fluid, which was delivered to the wall part 12d from the branch flow channel 11d, to the whole circumference of the collar part 12. The adapter part 13 has a slit 13b, which is formed toward the cutter part 14 from the collar part 12, on the whole circumference of an outer peripheral surface 13a, transmits the fluid, which was delivered from the whole circumference of the collar part 12, to the outer peripheral surface 13a through the slit 13b, and delivers the fluid toward the cutter part 14.SELECTED DRAWING: Figure 1

Description

The present invention relates to a skiving processing apparatus.

When manufacturing a gear, a skiving processing method is known in which a gear is formed by scraping a tooth groove while rotating an object to be machined and a tool at a high speed in synchronization with each other.

Conventionally, Japanese Patent Application Laid-Open No. 2019-042833 is available as a technique in such a field. The apparatus described in this publication has a branch flow path in which a fluid flows from the central flow path in the holder in the holder radial direction in the cutting fluid flow path of the skiving cutter, and after further flowing through the branch flow path, a circle. A discharge port for discharging the fluid toward the teeth of the skiving cutter is provided via an annular flow path through which the liquid flows in the circumferential direction.

Japanese Unexamined Patent Publication No. 2019-042833

However, in the conventional skiving processing apparatus described above, when the cutting fluid is sent toward the teeth of the skiving cutter, the cutting fluid is discharged from the discharge hole. Therefore, the supply amount of the cutting fluid may be biased between the portion where the discharge hole is provided and the portion where the discharge hole is not provided. Therefore, the cutting fluid cannot be evenly sent to the teeth of the skiving cutter, which may cause unnecessary wear of the skiving cutter.

Here, FIG. 5 is a diagram showing an example of a side surface of the skiving processing apparatus when performing skiving processing, and FIG. 6 is a diagram showing an example of a top view. As shown in FIGS. 5 and 6, when the internal teeth of the gear are formed by the skiving cutter, the cutting fluid is supplied only to the rake face of the skiving cutter, and the flank surface of the skiving cutter is used. Chips may be crimped to the flank, causing extra wear on the flank.

In particular, when the cutting fluid is supplied externally rather than from the inside of the holder, the cutting fluid is efficiently supplied because the gap between the skiving cutter or holder and the object to be machined is small. Is difficult.

The present invention provides a skiving processing apparatus that evenly supplies a cutting fluid to a skiving cutter and suppresses wear of the skiving cutter.

The skiving processing apparatus according to the present invention includes a holder, a collar portion connected to the holder, an adapter portion that fits with the inner circumference of the wall portion of the collar portion, and a cutter portion attached to the adapter portion. In the holder, the holder has a central flow path for flowing a fluid in the extending direction of the holder and a branch flow path for flowing a fluid from the central flow path to the outside in the radial direction of the holder. The collar portion has an annular flow path that allows a fluid sent from the branch flow path to the wall portion to flow all around the collar portion, and the adapter portion has the adapter portion on the entire circumference of the outer peripheral surface. It has a slit formed from the collar portion toward the cutter portion, and the fluid delivered from the entire circumference of the collar portion is transmitted through the slit to the outer peripheral surface and is delivered toward the cutter portion.
As a result, the cutting fluid can be supplied to the cutter portion from the slits provided on the entire circumference between the collar portion and the adapter portion.

As a result, the cutting fluid can be evenly supplied to the skiving cutter, and wear of the skiving cutter can be suppressed.

It is a side view of the skiving processing apparatus. It is an enlarged view of a color part. It is an enlarged view of the adapter part. It is a figure which shows an example of a processing flow. It is a figure which shows an example of the side surface of the related skiving processing apparatus. It is a figure which shows an example of the upper surface of the related skiving processing apparatus.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the skiving processing apparatus 1 includes a cylindrical holder 11, a collar portion 12 connected to an end portion of the holder 11, and an adapter portion 13 that fits with the inner peripheral wall of the collar portion 12. A cutter portion 14 attached to the adapter portion 13 and a fastening bolt 15 for fixing the cutter portion to the adapter portion 13 are provided.

Hereinafter, it is assumed that the extending direction of the holder 11 is the X direction (left-right direction), and the collar portion 12, the adapter portion 13, and the cutter portion 14 are arranged on the left end portion side which is the tip of the holder 11. ..

The holder 11 is attached to the spindle on the machine side and serves as a supply port for coolant (cutting fluid). Here, the holder 11 has a substantially cylindrical shape extending in the left-right direction and having a left end portion and a right end portion at the bottom. The holder 11 has a main body portion 11a having a major diameter, a tip short diameter portion 11b provided on the left side of the main body portion 11a, and a central flow path which is a hollow portion penetrating in the left-right direction from the main body portion 11a to the tip short diameter portion 11b. It has 11c and a branch flow path 11d which is a flow path formed radially outward from the central flow path 11c provided in the tip minor diameter portion 11b.

The tip minor diameter portion 11b is formed to have a slightly shorter diameter than the main body portion 11a. An inner peripheral portion on the right side of the cylindrical collar portion 12 is connected to the outer peripheral portion of the tip short diameter portion 11b so as to face each other.

In the central flow path 11c, a flow path is formed so that the cutting fluid supplied from the right side flows toward the collar portion 12 arranged on the left side. That is, the cutting fluid in the holder 11 flows in the extending direction of the holder 11 by passing through the central flow path 11c.

In the branch flow path 11d, the cutting fluid that has flowed to the left in the central flow path 11c branches and flows toward the outside in the radial direction of the holder 11. The cutting fluid that has passed through the branch flow path 11d in the tip short diameter portion 11b is delivered toward the inner peripheral wall of the left side portion 12b of the collar portion 12, which will be described later.

The collar portion 12 has a right side portion 12a having an inner peripheral portion formed of a wall portion 12d whose inner peripheral portion faces the outer periphery of the tip minor diameter portion 11b of the holder 11, and a wall portion formed on the left side of the right side portion 12a and fitted with an adapter portion. The left side portion 12b on which the 12d is formed is provided.

The wall portion 12d of the left side portion 12b can be fitted with the adapter portion 13. An annular flow path 12c (see FIG. 2), which is a flow path for the cutting fluid, is formed on the inner peripheral side of the wall portion 12d of the left side portion 12b. The annular flow path 12c is a flow path through which the cutting fluid flows in an annular shape on the inner peripheral side of the wall portion 12d of the left side portion 12b. Therefore, when the cutting fluid sent out from the branch flow path 11d of the holder 11 is supplied to the annular flow path 12c, the cutting fluid flows through the annular flow path 12c, and the cutting fluid is supplied to the entire radial direction of the wall portion 12d. It becomes a state. Further, the cutting fluid flows in the wall portion 12d of the left side portion 12b in an annular shape through the annular flow path 12c and flows toward the adapter portion 13 further arranged on the left side.

The adapter portion 13 connects the cutter portion 14 and the holder 11. For example, the adapter portion 13 and the cutter portion 14 are fastened to each other, and these are connected to the holder 11 via the fastening bolt 15.

Further, the adapter portion 13 is provided with a tapered outer peripheral surface 13a. Specifically, the outer peripheral surface 13a is formed so that the collar portion 12 side has a minor diameter and the cutter portion 14 side has a major diameter.

Here, on the collar portion 12 side of the outer peripheral surface 13a, the outer peripheral surface 13a is formed so as to be inward in the radial direction as compared with the inner circumference of the wall portion 12d of the collar portion 12. The outer peripheral surface 13a is formed so as to be connected in a gentle shape toward the radial outer peripheral portion of the cutter portion 14. As a result, the cutting fluid that has flowed through the annular flow path 12c on the inner circumference of the wall portion 12d of the collar portion 12 flows toward the outer peripheral surface 13a of the adapter portion 13.

The cutting fluid that has flowed to the outer peripheral surface 13a of the adapter portion 13 flows toward the cutter portion 14. Typically, the outer peripheral surface 13a is provided with a plurality of slits 13b (see FIG. 3) so as to extend from the collar portion 12 side to the cutter portion 14 side. Further, the slit 13b is formed on the entire circumference of the outer peripheral surface 13a.

The cutting fluid ejected from the collar portion 12 to the outer peripheral surface 13a of the adapter portion 13 travels along the outer peripheral surface 13a due to the Coanda effect and reaches the outer peripheral portion of the cutter portion 14. Here, the Coanda effect is an effect in which a jet of viscous fluid is attracted to a nearby wall, and this effect is generated by the property of the jet to draw in the surrounding fluid. Therefore, in the adapter portion 13, the cutting fluid passes through the slit 13b and is drawn toward the outer peripheral surface 13a by the Coanda effect, and is sent out toward the flank surface of the cutter portion 14.

The cutter portion 14 is a portion provided with a cutter for performing internal tooth processing. A flank is arranged on the outer peripheral portion in the radial direction of the cutter portion 14. Cutting fluid is supplied to the flank from the outer peripheral surface 13a of the adapter portion 13. Further, as will be described later, in the cutter portion 14, the cutting fluid is supplied outward in the radial direction from the discharge port of the bolt head 15b of the fastening bolt 15 arranged substantially from the center in the radial direction.

The fastening bolt 15 includes a bolt body portion 15a arranged so as to extend in the left-right direction, and a bolt head portion 15b. The bolt body portion 15a penetrates the adapter portion 13 and the cutter portion 14 and fastens them. Further, the fastening bolt 15 fastens the adapter portion 13, the cutter portion 14, and the holder 11 when the tip portion of the bolt body portion 15a reaches the center flow path 11c of the tip minor diameter portion 11b of the holder 11. doing.

Further, inside the bolt body portion 15a of the fastening bolt 15, a bolt body flow path 15c, which is a hollow portion penetrating in the left-right direction, is formed. Further, the bolt head 15b is formed with a bolt head flow path 15d that is open in the radial direction. The bolt body flow path 15c and the bolt head flow path 15d are connected. The cutting fluid flows from the central flow path 11c of the holder 11 to the bolt head flow path 15d via the bolt body flow path 15c, and is discharged to the cutter portion 14 from the discharge port provided in the bolt head 15b.

Next, the procedure for supplying the cutting fluid from the holder 11 to the cutter portion 14 will be described with reference to FIG.

The cutting fluid is supplied to the holder 11 (step S1). The cutting fluid flows toward the collar portion 12 via the central flow path 11c.

A part of the cutting fluid flowing through the central flow path 11c is diverted to the branch flow path 11d (step S2).

The cutting fluid that has flowed through the central flow path 11c without being divided into the branch flow path 11d is sent to the bolt head flow path 15d via the bolt body flow path 15c (step S3).

The cutting fluid supplied to the bolt head flow path 15d is discharged to the cutter portion 14 from the discharge port provided in the bolt head 15b (step S4). At this time, the cutting fluid is supplied to the rake face of the cutter of the cutter portion 14.

On the other hand, the cutting fluid diverted into the branch flow path 11d is discharged toward the inner peripheral side of the wall portion 12d of the left side portion 12b of the collar portion 12 (step S5).

The cutting fluid flows through the annular flow path 12c provided on the inner peripheral side of the wall portion 12d of the collar portion 12 (step S6). As a result, the cutting fluid is supplied to the entire circumference inside the wall portion 12d.

The cutting fluid is ejected from the inside of the wall portion 12d of the collar portion 12 onto the outer peripheral surface 13a of the adapter portion 13 (step S7).

The cutting fluid is sent to the cutter portion 14 in a state of being attracted to the outer peripheral surface 13a side by the Coanda effect through the slit 13b provided on the outer peripheral surface 13a of the adapter portion 13 (step S8). At this time, the cutting fluid is supplied to the flank of the cutter in the cutter portion 14.

As a result, the cutting fluid can be supplied not only to the rake face of the cutter but also to the flank surface in the cutter portion 14. As a result, the cutting fluid can be evenly supplied to the cutter portion 14, and the wear of the cutter can be suppressed.

The present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit. That is, the above description has been omitted or simplified as appropriate for the sake of clarification of the description, and those skilled in the art can easily change, add, or convert each element of the embodiment within the scope of the present invention. It is possible.

For example, it has been described that the cutting fluid is discharged outward in the radial direction from the radial center side of the cutter portion 14 by using the flow path provided in the fastening bolt 15, but the present invention is not limited to this. In other words, the cutting fluid is supplied from the radial center side of the cutter portion 14 by a method that does not use the flow path in the fastening bolt 15, while the outer peripheral surface 13a of the adapter portion 13 is connected as described above. By supplying only the cutting fluid to the flank of the cutter, the cutting fluid may be evenly supplied to the cutter portion 14.

1 Skiving equipment 11 Holder 11a Main body 11b Tip short diameter 11c Central flow path 11d Branch flow path 12 Color part 12a Right side 12b Left side 12c Circular flow path 12d Wall 13 Adapter 13a Outer peripheral surface 13b Slit 14 Cutter 15 Fastening bolt 15a Bolt body 15b Bolt head 15c Bolt body flow path 15d Bolt head flow path

Claims (1)

With the holder
The collar part connected to the holder and
An adapter part that fits with the inner circumference of the wall part of the collar part, and
A cutter portion attached to the adapter portion is provided.
The holder
In the holder, a central flow path through which a fluid flows in the extending direction of the holder, and
It has a branch flow path for flowing a fluid from the central flow path to the outside in the radial direction of the holder.
The color part is
It has an annular flow path that allows the fluid sent from the branch flow path to the wall portion to flow all around the collar portion.
The adapter part
A slit formed from the collar portion to the cutter portion is provided on the entire circumference of the outer peripheral surface.
The fluid delivered from the entire circumference of the collar portion is transmitted to the cutter portion through the slit and transmitted through the outer peripheral surface.
Skiving processing equipment.

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