JP2585152Y2 - Round piece type throwaway tip - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a round piece type insert which is used for a cutting tool such as a milling machine, a cutting tool or a hole.

[0002]

2. Description of the Related Art Conventionally, in the case of a throw-away type cutting tool such as a milling machine, a cutting tool or a boring hole, since a cutting effective cutting edge is large, there are many so-called round piece type throw-away tips having a circular cutting edge portion. Used.

In such a round piece type insert insert, for example, as shown in Japanese Utility Model Publication No. 51-26395, a mounting hole for fixing the insert to the main body is formed in the same manner as the cutting edge portion. In a circular shape, Japanese Utility Model Application Laid-Open No. 52-95980 discloses a round boss formed on the lower surface of a round piece type insertable insert, and this boss is fitted into a receiving hole provided in a holder. Japanese Laid-Open Utility Model Publication No. 52-144493 discloses a tapered boss provided below a round piece type insert tip, and the boss is fitted into a tapered hole formed in the main body. And the chip are fixed.

[0004] Here, in all of the prior art round piece type throw-away tips disclosed in the above publications and the like, the mounting portion to the main body is circular.

[0005] However, when the round piece-type throw-away tip is attached to the main body in a circular shape as described above, when the tip is worn or chipped due to use and the corner is changed, a defective portion is found and a new cut is made. It is extremely difficult to make a blade, which consumes a lot of work time. In addition, the positioning of the insert is not appropriate, and cutting may be performed again depending on the defective part, and the corner changeability during reuse is greatly reduced. was there.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problem in a round piece type insert insert having a circular cutting edge. When wear or chipping occurs on the blade, when changing the corner of this round piece type insert, the corner change of the insert with respect to the main body is greatly improved, workability is improved, and re-cutting at the defective part of the insert is required. It is an object of the present invention to provide a round piece type insert tip that can be prevented.

[0007]

In order to solve the above-mentioned problems, a round piece type throwaway chip having a circular cutting edge is provided in the round piece type insert chip of the present invention.
To the tool body at the center of this insert
Through a polygonal mounting hole for the hole .

[0008]

[Effects of the Invention] Here, when attaching the round piece type insert insert of the present invention to the cutting tool body, penetrate the center of the round piece type insert insert.
One inner wall of the polygonal mounting hole provided is positioned on the fixing surface of the lever pin on the main body side, and the chip is fixed to the main body by lever lock.

The use of one of the cutting edges of this tip
A part used as a cutting blade due to wear and chipping in the part
When changing the the Installing the provided in the chip
The other inner wall of the hole is located on the lever pin fixing surface on the main body side and fixed in the same manner as in the above case.

[0010] This makes it possible to greatly reduce the time required for observing the defective portion of the chip, and as a result, it can be used as a cutting edge.
Rotate the tip by the required angle to change the part
To significantly reduce the time required for mounting
Can be easily changed at the corner of the chip.
Re-cutting at a defective portion of the insert can be prevented.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a round piece type insert tip according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a front view of a round piece type throw-away tip according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the round piece type throw-away tip of the embodiment, and FIG. It is the front view which showed the state which attached the round piece type throwaway tip to the tool main body.

The round piece type insert chip 1 of this embodiment has a plate-shaped negative flank 11 as shown in FIG.
b are provided, and circular cutting blades 13a and 13b composed of the flank and the rake face are provided on the outer peripheral side.
If desired, chip breakers 14a and 14b are formed on the sides of the squeeze surfaces 12a and 12b, and a mounting hole 10 for a main body having inner walls 10a, 10b, 10c and 10d is provided at the center of the chip.

In the round piece type tip 1 of this embodiment, the inner walls 10a, 10b, 10c, 1
Although the rectangular mounting hole 10 having 0d is used, a triangular mounting hole having three inner walls, or a pentagonal or larger mounting hole may be used depending on the amount of cutting provided to the chip.

Further, a boss is formed on one or both of the surfaces of the chip at the center of the chip, and the outer periphery of the boss is formed in a polygon similar to the above, and the chip seat on the main body is attached to the boss of the chip. Corresponding recesses may be formed and these may be fitted and clamped.

When attaching the round piece type throw-away tip 1 to the tool body 2, the round piece type throw-away tip 1 is mounted on a tip seat 20 having a lever lock (not shown) provided on the tool body 2. Place.

At this time, the lever pin 21 of the lever lock
Is positioned so as to face the inner wall 10a of the mounting hole 10 of the round piece type throw-away tip 1 and then tighten the lever lock screw 23 to remove the round piece-type throw-away tip 1 from the tool. It is fixed to the tip seat 20 of the main body 2.

When the cutting edges 13a and 13b of the round piece type throw-away tip 1 are worn or chipped due to use, when the round piece type throw-away tip 1 is to be corner-changed, the tool body 2
The lever lock screw 23 is loosened to remove the round piece-type throw-away tip 1, and then the other inner wall 1 in the mounting hole 10 of the round piece-type throw-away tip 1 is removed.
0b is positioned on the fixing surface 22, and the round piece insert 1 is fixed to the tool body 2 as described above. Then, when wear or chipping occurs, the round piece type The corner of the throw-away tip 1 is changed.

[0019]

[Effects of the Invention] The present invention can greatly reduce the time required for observing a defective portion such as abrasion or chipping generated on a round piece type insert insert by the above-described configuration and its operation. , Change the part used as a cutting blade
To rotate the tip by the required angle.
Time can be greatly reduced,
It is easy to change corners, and the number of insert cutting corners is a polygon
Since the number of inner walls matches the number of inner walls of the mounting holes, effective man-hour management and tool management can be performed.

The round piece insert has a variety of effects such as preventing wear of the insert and re-cutting at the chipping portion.

[Brief description of the drawings]

FIG. 1 is a front view of a round piece type chip according to an embodiment of the present invention.

FIG. 2 is a sectional view of the round piece type chip of the embodiment.

FIG. 3 is a front view of a tool to which the round piece type tip of the embodiment is fixed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Round piece type throw-away tip 10 Mounting hole 10a, 10b, 10c, 10d Inner wall 11 Relief surface 12a, 12b Squeeze surface 13a, 13b Circular cutting edge 2 Tool body 20 Tip seat 21 Lever pin 22 Fixed surface 23 Lever lock screw

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23B 27/00 B23B 27/16

Claims (1)

(57) [Scope of request for utility model registration] 1. A round piece type throwaway having a circular cutting edge.
At the center of this tip, attach it to the tool body.
Polygonal mounting holes for attachment
Marukoma type cutting insert is characterized by comprising.