JPH11197906A - Round shape throw-away tip or throw-away cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain a cutting edge or the like of a round shape throw-away tip from being damaged during cutting so as to carry out stable cutting for a long time, by attaching the round shape throw-away tip onto a tool body with no play. SOLUTION: A round shape throw-away tip 10 in which a protrusion 13 is projected from the rear surface of a disc-like tip 11 formed at the periphery of its outer surface with a cutting edge 12, and in which an attaching hole 14 is formed piercing through the tip and the projection while a flat locking surface 14 is formed in the protrusion, is inserted with its protrusion into an attaching hole 21 in a tool body 20, and the locking surface 15 of the protrusion is joined to a flat joint surface 22 of an attaching part. In this condition, the round shape throw-away tip is fixed to the tool body by means of a fastening member 30 through the attaching hole 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a round indexable insert having a cutting edge provided around the surface of a disk-shaped insert, and a cutting method in which such a round indexable insert is attached to a tool body. The present invention relates to a throw-away type cutting tool to be performed.

[0002]

2. Description of the Related Art Conventionally, as one of cutting tools such as a milling tool, a cutting tool, a boring hole, a round indexable insert having a cutting edge provided around a disk-shaped insert surface has been used. A throw-away type cutting tool in which a die-type insert was attached to the tool body was used.

Here, in such a throw-away type cutting tool, when a round-shaped insert is attached to a tool body, as shown in FIG. 1, a cutting edge is formed around a surface of a disk-shaped insert 1a. In the round throw-away insert 1 provided with the insert 1b, a protrusion 1c to be attached to the tool body 2 is projected from the back surface of the insert 1a, and the cut 1d for contacting and stopping the protrusion 1c.
Was formed.

On the other hand, in a tool body 2 to which the round insert insert 1 is attached, as shown in FIG.
A mounting portion 2a into which the above-mentioned protruding portion 1c is inserted is provided, and a screw hole 2b is provided so as to penetrate the mounting portion 2a.

[0005] Then, the projecting portion 1c of the round-shaped insert 1 is inserted into the mounting portion 2a of the tool body 2, and the mounting bolt 3 is inserted into the screw hole 2b provided in the mounting portion 21 of the tool body 1. Is screwed, and the round-shaped insert 1 is fixed to the tool body 2 by pressing the cut-out 1 d in the protrusion 1 c inserted into the mounting portion 21 with the mounting bolt 3.

However, when the round indexable insert 1 is attached to the tool body 2 in this manner, the round indexable insert 1 is not sufficiently fixed in a state in which it is in close contact with the tool body 2, and such When cutting is performed using a throw-away type cutting tool, a gap is generated between the tool main body 2 and the round-shaped cutting insert 1, and the round-shaped cutting insert 1 rattles to break the cutting edge 1b. There was a problem such as doing.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a round-shaped chip having a cutting edge provided around the surface of a disk-shaped chip, and a protruding portion attached to a tool body protruding from the back surface of the chip. It is an object of the present invention to solve the above-mentioned problem in the case of performing cutting by attaching the above-mentioned round throw-away tip to a tool body in a throw-away type cutting tool using a throw-away tip.

That is, according to the present invention, in a throw-away type cutting tool for cutting by attaching the above-mentioned round indexable insert to the tool body, it is sufficient that the round indexable tip is in close contact with the tool body. It is an object to make it possible to perform stable cutting over a long period of time without cutting edge etc. of this round throwaway tip being rattled during cutting, and cutting edges etc. in this round throwaway tip are not damaged. Is what you do.

[0009]

According to a first aspect of the present invention, there is provided a circular indexable insert having a cutting edge formed around a surface of a disk-shaped insert to solve the above-mentioned problems. Provided and this chip 11
In a round throw-away chip having a projecting portion 13 attached to the tool body 20 projecting from the back surface of the tool, a mounting hole 14 is provided to penetrate the tip 11 and the projecting portion 13, and an outer surface of the projecting portion 13 A flat locking surface 15 is provided.

Further, in the indexable cutting tool according to claim 2 of the present invention, in order to solve the above-mentioned problems, a indexable cutting tool in which a round indexable insert 10 is attached to a tool body 20. In the meantime, while using the round throwaway tip 10 described in claim 1 above, the tool body 20 is provided with a mounting portion 21 into which the projecting portion 13 of the round throwaway tip 10 is inserted. The mounting portion 21 is provided with a flat joining surface 22 for joining with the locking surface 15 provided on the projecting portion 13 of the round throw-away tip 10, and the projecting portion 13 of the round throw-away tip 10 is attached to the tool body. 20 and the protrusion 13
With the engagement surface 15 and the joint surface 22 of the mounting portion 21 joined together, the round indexable insert 10 is connected to the tool body by the fastening member 30 through the attachment hole 14 provided in the circular indexable insert 10. 20.

Here, like the throw-away type cutting tool of the present invention, the projecting portion 13 of the round-shaped insert 10 is inserted into the mounting portion 21 provided on the tool body 20 and provided on the projecting portion 13. With the flat locking surface 15 thus formed joined to the flat joining surface 22 provided on the mounting portion 21, the round indexable tip 10
When the round indexable insert 10 is fixed to the tool main body 20 by the fastening member 30 through the mounting hole 14 provided in the, the round indexable tip 10 is attached in a state of being in close contact with the tool main body 20 by the fastening member 30, and The protruding portion 13 of the round throw-away tip 10
The rotation of the round throw-away tip 10 during cutting is also suppressed by joining the locking surface 15 provided on the tool body 20 and the joining surface 22 provided on the mounting portion 21 of the tool body 20.

Therefore, in the indexable cutting tool according to the present invention, the round indexable insert 10 attached to the tool body 20 does not rattle during cutting, and the cutting edge 12 Such damage can be prevented, and stable cutting can be performed over a long period of time.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a round indexable insert and a indexable cutting tool according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings.

In this embodiment, the round indexable insert 10 is made of a super-hard tool material.
As shown in FIGS. 3 (A) and 3 (B), a projecting portion 13 for attaching the round indexable insert 10 to the tool body 20 is provided on the back surface of the insert 11 having a disk shape and a cutting edge 12 formed around the insert 11. A flat locking surface 15 is provided on both sides of the tip of the protrusion 13, and a mounting hole 14 is provided in the center of the chip 11 to penetrate the chip 11 and the protrusion 13. I have.

On the other hand, the round indexable insert 10
In the tool body 20 to which the
(A) As shown in (B), the mounting portion 2 for inserting the protruding portion 13 in the round throw-away tip 10 described above.
1 and a pair of flat joining surfaces 22 which are joined to the engaging surfaces 15 at both ends of the tip of the projecting portion 13 are provided on the mounting portion 21. The part 13 is attached to the mounting part 21 of the tool body 20.
The mounting portion 21 is provided with a screw hole 23 so as to communicate with the mounting hole 14 provided in the round throw-away tip 10 when it is inserted into the mounting member 21.

Here, in the indexable cutting tool according to this embodiment, when attaching the circular indexable insert 10 to the tool body 20, as shown in FIG.
In this case, the projecting portion 13 protruding from the back surface of the chip 11 is inserted into the mounting portion 21 of the tool body 20, and the locking surfaces 15 on both sides of the projecting portion 13 are respectively engaged with the tool body 20.
And the joining surface 22 provided on the attaching portion 21 of the first embodiment.

Then, with the protruding portion 13 of the round-shaped insert 10 inserted into the mounting portion 21 of the tool body 20, the tip 11 and the protruded portion 13 of the round-shaped insert 10 are penetrated. Mounting bolts 3 as fastening members 30 in the mounting holes 14
Then, the mounting bolt 30 is screwed into the screw hole 23 provided in the tool main body 20 through the mounting hole 14, and the round throw-away tip 10 is fixed to the tool main body 20 by the mounting bolt 30.

In this way, the mounting bolt 30
The tip 1 of the round throw-away tip 10
1 is fixed in a state where the back surface thereof is in close contact with the mounting portion 21 of the tool body 20, and the locking surfaces 15 provided on both sides of the protruding portion 13 are respectively bonded to the bonding surfaces 22 provided on the mounting portion 21. Thus, rotation of the round throw-away tip 10 with respect to the tool body 20 is suppressed.

When the round indexable insert 10 is cut using the indexable cutting tool attached to the tool body 20 as described above, the circular indexable tip 10 comes into close contact with the tool body 20. In this state, the round throwaway tip 10 does not rattle, and the round throwaway tip 10 does not rotate during cutting.
Damage to the cutting edge 12 and the like provided on the round-shaped insert 10 is suppressed, and stable cutting can be performed over a long period of time.

[0020]

As described above in detail, according to the present invention, a cutting edge is provided around the surface of a disk-shaped chip, and a protrusion for mounting to a tool body is projected from the back surface of the chip. In a round-shaped insert, a mounting hole is provided to penetrate the tip and the projection, and a flat locking surface is provided on the outer surface of the projection. In addition to providing a mounting portion into which the protruding portion of the round throwaway tip is inserted, a flat joining surface to be joined to the locking surface provided on the protruding portion of the round throwaway tip is provided on the mounting portion. did.

In the indexable cutting tool according to the present invention, the projecting portion of the round indexable insert is inserted into the mounting portion of the tool body.
In a state where the engagement surface of the projection and the joining surface of the mounting portion are joined, the round-shaped throw-away tip is fixed to the tool body by a fastening member through the above-described attachment hole provided in the round-shaped throw-away tip. As a result, the round throwaway tip is attached in a state of being in close contact with the tool body by the fastening member, and the locking surface provided on the projecting portion of the round throwaway tip and the joining surface provided on the mounting portion of the tool body. , The rotation of the round indexable insert during cutting is also suppressed.

As a result, in the indexable cutting tool according to the present invention, the round indexable insert attached to the tool body does not rattle during cutting, and the cutting edge of the indexable insert is damaged. Is prevented, and stable cutting can be performed for a long period of time.

[Brief description of the drawings]

FIG. 1 is a front view showing a conventional round throw-away tip.

FIG. 2 is an explanatory partial cross-sectional view of a conventional throw-away type cutting tool in which a round throw-away tip is attached to a tool body.

FIG. 3 is a front view and a bottom view of a round indexable tip used in the embodiment of the present invention.

FIG. 4 is a front view and a plan view of a tool main body used in the embodiment of the present invention.

FIG. 5 is an explanatory cross-sectional view showing a state in which a round indexable insert is attached to a tool body in the indexable cutting tool according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Round throw-away tip 11 Tip 12 Cutting blade 13 Projection part 14 Mounting hole 15 Locking surface 20 Tool body 21 Mounting part 22 Joining surface 30 Fastening member (Mounting bolt)

Claims (2)

[Claims] 1. A round indexable insert in which a cutting edge 12 is provided around the surface of a disk-shaped insert 11, and a projection 13 attached to a tool body 20 is projected from the back surface of the insert 11. The above chip 11
And a mounting hole 14 penetrating through the projection 13 and
A round indexable insert, wherein a flat locking surface 15 is provided on an outer surface of the projection 13. 2. In a throw-away type cutting tool in which a round-shaped insert 10 is attached to a tool body 20, the round-shaped insert 10 according to claim 1 is used, and The mounting portion 21 into which the protruding portion 13 of the round throw-away tip 10 is inserted is joined to the above-mentioned locking surface 15 provided on the protruding portion 13 of the round throw-away tip 10. A flat joint surface 22 is provided, and the projecting portion 13 of the round insert tip 10 is attached to the tool body 2.
0 in the round throw-away tip 10 with the locking surface 15 of the protruding portion 13 and the joining surface 22 of the attaching portion 21 joined together. Characterized in that the round indexable insert 10 is fixed to the tool body 20 by a fastening member 30 through the cutting tool.