WO2017056969A1

WO2017056969A1 - Cutting insert anchoring member and cutting tool

Info

Publication number: WO2017056969A1
Application number: PCT/JP2016/076985
Authority: WO
Inventors: 武田　茂
Original assignee: 株式会社タンガロイ
Priority date: 2015-09-29
Filing date: 2016-09-13
Publication date: 2017-04-06
Also published as: JPWO2017056969A1; JP6436322B2

Abstract

A cutting insert anchoring member (30) for anchoring a cutting insert (20) to the body (10) of a cutting tool (100) comprises a main body (37), a main body channel (34), and a nozzle (31). The main body (37) presses a rake face (20a) of the cutting insert (20). The main body channel (34) is formed inside the main body (37) and a cooling fluid flows therein. A nozzle channel (31a) in which the cooling fluid flows is formed in the nozzle (31). The cooling fluid flows from the main body channel (34) into the nozzle channel (31a), and the cooling fluid is sprayed onto the rake face (20a).

Description

Cutting insert fixing member and cutting tool

The present invention relates to a cutting insert fixing member for fixing a cutting insert to a body of a cutting tool, and a cutting tool including the cutting insert fixing member.

Injecting coolant toward the cutting edge of a cutting tool produces various beneficial effects such as cooling the cutting edge that has become hot due to friction and preventing chip welding. Various coolant injection methods have been devised. For example, as what inject | pours a coolant from the rake face side of a cutting insert, there exists a thing provided with the nozzle component in which the flow path of coolant was formed like the cutting tool currently disclosed by patent document 1. FIG. In the cutting tool, the cutting insert is fixed by an L-shaped lever so as to be pulled into the cutting tool.

JP 2006-55917 A

However, in order to securely fix the cutting insert, it is preferable to press the rake face of the cutting insert using a screw or the like. In the cutting tool described in Patent Document 1, the nozzle part is disposed above the rake face of the cutting insert, and the space on the rake face side is occupied by the nozzle part. For this reason, in the said cutting tool, there existed a subject that the screw etc. which were mentioned above were arrange | positioned at the rake face side, and the cutting insert cannot be fixed from the rake face side.

An object of the present invention is to provide a cutting insert fixing member capable of fixing a cutting insert from the rake face side and jetting a cooling fluid from the rake face side, and a cutting tool including the cutting insert fixing member. To do.

The cutting insert fixing member according to the present invention includes a main body that presses the rake face of the cutting insert, a main body channel that flows the cooling fluid, and a nozzle channel that flows the cooling fluid. And a nozzle for injecting the cooling fluid from the main body flow channel into the nozzle flow channel and for injecting the cooling fluid to the rake face.

It is also preferable that an annular member made of an elastic material is disposed around a connection portion between the main body flow path and the body flow path formed in the body and through which the cooling fluid flows.

It is also preferable that the nozzle has a male screw portion formed on the outer peripheral portion thereof and is attached to the main body by the male screw portion.

It is also preferable to further include a nozzle pressing member that applies a force to the nozzle in a direction inclined with respect to the axis of the nozzle.

It is also preferable that a recess is formed in the outer peripheral portion of the nozzle, and the nozzle pressing member presses the recess.

It is also preferable that the recess is a groove formed in the circumferential direction on the outer peripheral surface of the nozzle.

It is also preferable that the nozzle flow path has a reduced portion in which the inner diameter gradually decreases toward the downstream.

It is also preferable that the reduced portion is disposed in the vicinity of the nozzle inlet, and the inner wall thereof is formed in a curved shape protruding toward the nozzle axis.

The cutting tool of the present invention includes the cutting insert fixing member of the present invention.

According to the present invention, it is possible to provide a cutting insert fixing member capable of fixing a cutting insert from the rake face side and jetting a cooling fluid from the rake face side, and a cutting tool including the cutting insert fixing member. it can.

It is a perspective view of the cutting tool concerning an embodiment. It is the perspective view which looked at the cutting tool of FIG. 1 from another angle. It is a front view of the cutting tool of FIG. It is a top view of the cutting tool of FIG. FIG. 5 is a VV sectional view of the cutting tool of FIG. 4. It is a side view of the insert of FIG. It is a perspective view of the cutting insert fixing member of FIG. It is the perspective view which looked at the cutting insert fixing member of FIG. 7 from another angle. It is a front view of the cutting insert fixing member of FIG. It is a top view of the cutting insert fixing member of FIG. FIG. 11 is a XI-XI cross-sectional view of the cutting insert of FIG. It is sectional drawing of the cutting insert which concerns on other embodiment.

Hereinafter, description will be made with reference to the drawings showing the embodiments. As shown in FIGS. 1 to 6, the blade-tip-exchangeable cutting tool 100 includes a body 10 and a cutting insert 20. A tip seat 11 for arranging the cutting insert 20 is formed at the tip of the body 10. A shim 12 for preventing damage to the body 10 is placed on the chip seat 11. A cutting insert 20 is placed on the shim 12. The cutting insert 20 is pressed and fixed to the chip seat 11 by a cutting insert fixing member 30 disposed on the rake face 20a side. The cutting insert fixing member 30 includes a main body 37. As shown in FIGS. 7, 8, 10, and 11, the main body 37 is formed with a through hole 32 through which the screw 33 is inserted. The screw 33 inserted through the through hole 32 is fixed to a female screw hole (not shown) formed in the body 10. When the screw 33 is tightened, the head of the screw 33 applies a force in a direction perpendicular to the bottom surface of the chip seat 11 to the main body 37. Thereby, the lower surface of the main body 37 abuts on the rake face 20 a of the cutting insert 20 and presses in the direction of the bottom surface of the chip seat 11. As a result, the cutting insert 20 is fixed to the chip seat 11.

The

nozzles

13 and 14 directed to the cutting insert 20 are attached to both sides of the chip seat 11. The cutting insert fixing member 30 includes a nozzle 31. As shown in FIG. 11, a main body flow path 34 is formed inside the main body 37 of the cutting insert fixing member 30. The nozzle 31 has a substantially cylindrical shape, and a nozzle channel 31 a extending along the axis C is formed inside. The nozzle 31 is disposed such that the nozzle channel 31 a communicates with the outlet 34 b of the main body channel 34. A male thread portion 31 b is formed at the end of the nozzle 31. A female thread portion is formed at the outlet 34 b of the main body channel 34. The nozzle 31 is fixed to the main body 37 when the male screw portion 31b is screwed with the female screw portion of the outlet 34b. In the vicinity of the inlet of the nozzle channel 31a, a reduced portion 35 is formed in which the inner diameter gradually decreases toward the outlet 31c (that is, downstream). The inner wall of the reduced portion 35 is formed in a curved shape that protrudes toward the axis C of the nozzle 31. By forming the reduced portion 35 in a curved surface shape, the coolant that is the cooling fluid can be injected while suppressing the pressure loss.

As shown in FIG. 5, the inlet 34 a of the main body channel 34 communicates with the outlet 15 a of the body channel 15 formed inside the body 10. The coolant that has passed through the body channel 15 flows through the main body channel 34 of the cutting insert fixing member 30 and flows into the nozzle channel 31 a of the nozzle 31. The coolant is injected from the outlet 31c (see FIG. 11) of the nozzle 31 toward the rake face 20a.

As shown in FIG. 5, an O-ring 40 is disposed around the connection portion CP between the inlet 34 a of the main body channel 34 and the outlet 15 a of the body channel 15. The O-ring 40 is made of an elastic material such as rubber or elastomer. The O-ring 40 prevents leakage when coolant flows from the body 10 to the main body 37. A circular wall portion corresponding to the size of the O-ring 40 is formed around the inlet 34 a of the main body channel 34. The O-ring 40 is disposed in a space (that is, an annular groove) surrounded by the circular wall portion. Thereby, since the O-ring 40 is fixed and the O-ring 40 spreads in the space, leakage of coolant from the connection portion CP between the main body 37 and the body 10 can be prevented.

Next, the effect of the above embodiment will be described. When the screw 33 inserted through the through hole 32 is tightened, the main body 37 is pushed by the head of the screw 33. The main body 37 contacts the rake face 20 a of the cutting insert 20 and presses the cutting insert 20 in the direction of the bottom surface of the chip seat 11. As a result, the cutting insert 20 to which the pressing force is applied is fixed to the chip seat 11.

The main body flow path 34 formed in the main body 37 communicates with the body flow path 15 formed in the body 10. Therefore, the coolant supplied from the body 10 side flows through the inside of the body 10 and the inside of the main body 37 and is injected from the nozzle 31.

Thus, the cutting insert fixing member 30 has both a function of fixing the cutting insert 20 and a function of injecting coolant. Therefore, both the fixing of the cutting insert 20 and the injection of the coolant can be performed only by securing a space in which the cutting insert fixing member 30 can be disposed. Since the nozzle 31 is fixed by the male screw portion 31b formed around the nozzle 31, it can be easily replaced. By selecting the nozzle shape according to the type of machining, the machining conditions, and the like, the coolant can be sprayed to the cutting insert 20 more effectively.

As mentioned above, although embodiment was described, this invention is not limited to said embodiment. For example, in the above embodiment, the O-ring 40 is employed as the annular member. However, the annular member according to the present invention is not limited to the O-ring 40. That is, any member other than the O-ring 40 can be used as the annular member as long as it is a member formed of an elastic material and presenting an annular shape. Moreover, there is no limitation in particular in the material of an annular member, What kind of thing may be used if it has elasticity.

In the above embodiment, the nozzle 31 is fixed only by the male screw portion 31b formed on the outer peripheral portion thereof. However, the method for fixing the nozzle according to the present invention is not limited to this. For example, a nozzle pressing member can be used to fix the nozzle 31 more firmly.

In the cutting insert fixing member 30 </ b> A according to another embodiment shown in FIG. 12, the nozzle pressing member 50 presses the outer peripheral surface of the nozzle 31 to fix the nozzle 31. FIG. 12 shows a cross-sectional view corresponding to the XI-XI cross section of FIG. A recess 31 d is formed on the outer peripheral surface of the nozzle 31. Of the configurations of the cutting insert fixing member 30A, the same configurations as those of the above-described embodiment are denoted by the same reference numerals. The recess 31 d is a groove formed in the circumferential direction of the outer peripheral surface of the nozzle 31. The nozzle pressing member 50 has a male screw part 51 and a tip part 52. The male screw portion 51 of the nozzle pressing member 50 is screwed with a female screw in a screw hole 371 formed in the lower portion of the main body 37A. The nozzle pressing member 50 presses the recess 31 d at the tip 52 thereof, and presses the nozzle 31 against the inner wall surface of the space that accommodates the nozzle 31. At this time, the direction in which the nozzle pressing member 50 presses the nozzle 31 is a direction inclined with respect to the central axis C of the nozzle 31. Thereby, the nozzle 31 can be fixed more reliably.

DESCRIPTION OF SYMBOLS 10 ... Body 11 ... Chip seat 15: Body flow path 16: Connection part 20 ... Cutting insert 20a: Rake face 30 ... Cutting insert fixing member 31 ... Nozzle 31a: Nozzle flow path 31b: Male thread part 31d: Recess 34 ... Main body flow path 37 ... Main body 40 ... O-ring (ring member)
100 ... Cutting edge exchangeable cutting tool (cutting tool)

Claims

A cutting insert fixing member (30) for fixing the cutting insert (20) to the body (10) of the cutting tool (100),
A body (37) for pressing the rake face (20a) of the cutting insert (20);
A main body channel (34) formed inside the main body (37) for flowing a cooling fluid;
A nozzle channel (31a) for flowing a cooling fluid is formed inside, and the cooling fluid is allowed to flow into the nozzle channel (31a) from the main body channel (34), and the cooling fluid is supplied to the rake face ( 20a) a nozzle (31) for spraying;
A cutting insert fixing member comprising:
An annular member (40) formed of an elastic material around a connection portion (CP) between the main body channel (34) and a body channel (15) formed in the body (10) and through which a cooling fluid flows. The cutting insert fixing member according to claim 1.
The cutting insert fixing member according to claim 1 or 2, wherein the nozzle (31) has a male screw portion (31b) formed on an outer peripheral portion thereof, and is attached to the main body (37) by the male screw portion (31b).
The cutting insert fixing according to any one of claims 1 to 3, further comprising a nozzle pressing member (50) that applies a force to the nozzle (31) in a direction inclined with respect to the axis (C) of the nozzle (31). Element.
A recess (31d) is formed on the outer periphery of the nozzle (31),
The cutting insert fixing member according to claim 4, wherein the nozzle pressing member (50) presses the recess (31d).
The cutting insert fixing member according to claim 5, wherein the concave portion (31d) is a groove portion formed in a circumferential direction on an outer peripheral surface of the nozzle (31).
The cutting insert fixing member according to any one of claims 1 to 6, wherein the nozzle flow path (31a) has a reduced portion (35) whose inner diameter gradually decreases toward the downstream.
The said reduction | decrease part (35) is arrange | positioned in the inflow port vicinity of the said nozzle (31), and the inner wall is formed in the curved surface shape which protrudes toward the axis line (C) side of the said nozzle (31). The cutting insert fixing member according to 1.
A cutting tool comprising the cutting insert fixing member (30) according to any one of claims 1 to 8.