JPH0737549U - Cutting equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cutting device capable of reliably scattering chips and reliably preventing chips from being caught between a throw-away tip and a cutting surface. . In a cutting device in which a throw-away tip 13 is fixed to a tip portion of a holder 11, a flow hole 15 for supplying a fluid such as compressed air or cutting oil is formed in the holder 11, and a fluid is provided in the throw-away tip 13. A through hole 17 for ejecting the powder toward chips
Through hole 17 of throw-away tip 13 in through hole 15 of
To communicate.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting device in which a throw-away tip is fixed to a tip portion of a holder, for example, a ball end mill in which a throw-away tip is fixed to a shank (holder).

[0002]

[Prior art]

 Conventionally, for example, a ball end mill is provided with a throw-away tip 2 at the tip of a shank 1 as shown in FIG. 4, and when a metal is surface-profiling processed by such a ball end mill, as shown in FIG. The ball end mill was moving along the planned surface.

In such cutting, the thickness of the chips 3 at the center of the ball end mill becomes large in the sinking at the point A, and due to defective discharge of the chips, the chips are caught between the throw-away tip and the cutting surface. However, there was a problem that the throw-away tip was damaged. Further, in the ascending process at the point B, the required cutting edge length becomes long, chips are not properly discharged, and the indexable insert is likely to be damaged as in the above case.

Conventionally, in order to prevent such chips from being caught between the throw-away tip and the cutting surface, as shown in FIG. 5, compressed air is blown out from the external nozzle 4 to remove the chips. It was blowing away. Further, as shown in FIG. 6, compressed air was blown out from the flow hole 5 provided in the shank 1 to scatter chips (see, for example, Japanese Utility Model Laid-Open No. 63-44712).

[0005]

[Problems to be solved by the device]

 However, as described above, when the chips are scattered by using the external nozzle 4 or the compressed air is blown out from the flow hole 5 provided in the shank 1, the chips are scattered, the central part of the cutting edge of the ball end mill is used. It was difficult to reliably disperse the chips from the ball end mill due to the poor separation of the chips in. For this reason, there is a problem that chips are caught between the throw-away tip and the cutting surface, and the throw-away chip is easily damaged.

Further, when the compressed air is blown out from the external nozzle, the compressed air cannot enter in the processing of the groove portion, and the chips cannot be sufficiently scattered.

The cutting device of the present invention is capable of reliably scattering chips and preventing the chips from being caught between the throw-away tip and the cutting surface. It is intended to be provided.

[0008]

[Means for solving problems]

 As a result of studying the above problems, the present inventor has formed a through hole communicating with the fluid flow hole of the holder in the throw-away tip and ejecting the fluid from the through hole of the throw-away tip. The present inventors have come to the present invention by discovering that chips can be reliably scattered.

That is, the cutting device of the present invention is a cutting device in which a throw-away tip is fixed to a tip portion of a holder, and a flow hole for supplying fluid to the holder is formed, and a fluid is fed to the throw-away tip. A through hole that ejects toward the chips is formed, and the through hole of the throw-away tip is communicated with the through hole of the holder.

[0010]

[Action]

 In the cutting device of the present invention, fluid such as compressed air or cutting oil is ejected from the flow hole of the holder through the through hole of the throw-away tip to the chips during cutting of metal or the like, and the chips are scattered. To be This prevents chips from getting caught between the indexable insert and the cutting surface.

[0011]

【Example】

 The cutting device of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a cutting device of the present invention, and reference numeral 11 denotes a holder. A concave portion 12 is formed at the tip of the holder 11, and a hollow away tip 13 is accommodated in the concave portion 12. As shown in FIG. 2, a mounting hole 14 is formed in the throw-away tip 13, and a bolt or the like is inserted into the mounting hole 14 and fixed to the recess 12 of the holder 11.

Then, as shown in FIG. 1, the holder 11 is formed with a through hole 15 for supplying compressed air. Further, the throw-away tip 13 is formed with through holes 17 for blowing the compressed air to the chips at two places, and one of these through holes 17 and the flow hole 15 of the holder 11 are shown in FIG. And as shown in FIG. The through hole 17 communicating with the flow hole 15 of the holder 11 is formed so that compressed air is blown out toward the chips.

In the cutting apparatus configured as described above, compressed air is blown from the flow hole 15 of the holder 11 through the through hole 17 of the throw-away tip 13 onto the chips while cutting metal or the like, Chips are scattered. Therefore, the chips can be sufficiently scattered, the chips can be surely prevented from being caught between the throw-away tip 13 and the cutting surface, and the life of the throw-away tip 13 can be extended. be able to.

Further, since the distance between the cutting surface and the compressed air supply source is shorter than that in the case of supplying compressed air from the conventional external nozzle or holder, the cutting surface can be cooled more by air, and the thermal strain of the work piece is reduced. Can be significantly suppressed as compared with the conventional one.

In this embodiment, an example in which the present invention is applied to a ball end mill has been described, but the present invention is applied to any cutting device other than the ball end mill as long as it is a cutting device having a throw-away tip at the tip of the holder. be able to. Further, in the above embodiment, the compressed air was used as the fluid to discharge the chips, but in the present invention, cutting oil may be used instead of the compressed air.

[0017]

[Effect of device]

 As described above in detail, in the cutting device of the present invention, fluid such as compressed air and cutting oil is sprayed from the flow hole of the holder through the through hole of the throw-away tip onto the chips while cutting metal or the like. , Chips are scattered. Therefore, the chips can be sufficiently scattered, the chips can be surely prevented from being caught between the throw-away tip and the cutting surface, and the life of the throw-away tip can be extended. it can.

[Brief description of drawings]

FIG. 1 is a front view showing a cutting device of the present invention.

FIG. 2 shows a throw-away tip of the cutting device of the present invention, (a) is a plan view of the throw-away tip,
(B) is a front view and (c) is a side view.

FIG. 3 is an exploded perspective view of the cutting device of the present invention.

FIG. 4 is an explanatory view showing a conventional cutting method using a ball end mill.

FIG. 5 is an explanatory diagram showing a state in which compressed air is blown using an external nozzle.

FIG. 6 is an explanatory view showing a state in which compressed air is blown from a flow hole formed in a shank.

[Explanation of symbols]

 11 holder 13 throw-away tip 15 through hole 17 through hole

Claims (1)

[Scope of utility model registration request] 1. A cutting device in which a throw-away tip is fixed to a tip end of a holder, a flow hole for supplying a fluid to the holder is formed, and a fluid is jetted toward the chip toward the throw-away tip. A cutting device, wherein a through hole is formed, and the through hole of the throw-away tip is communicated with the through hole of the holder.