JPH06262422A - Throw-away tip for cutting tool - Google Patents

Abstract

PURPOSE:To greatly improve the cutting property and expand the effective range of a cutting edge of a tip by forming the cutting edge of the curved shape consisting of the projecting face and the planar relief surface on the corner part on the side surface of the planar tip. CONSTITUTION:A tip 1 of approximately rectangular shape to be fixed to a tip pocket of a side milling body by a mounting bolt is provided with projecting faces 11a-11d from the front surface side 12a to the rear surface side of the corner part in a diagonal manner. The planar faces are formed on the side surfaces 13c, 13d of four sides to form the cutting edges 15a-15d where the sides constituted of the faces 11a-11d and the relief surfaces are curved. Beveled parts 16a, 16b are provided on the front surface side 12a and the rear surface side of the tip 1 to prevent the chipping property of the tip 1, and to improve the mounting of the side milling body on the tip pocket. This constitution allows the initial cutting to be started from the points of the cutting edges 15a-15d, leading to the advancement of the cutting and the expansion of the cutting range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a rolling tool such as a side milling cutter or a T-groove milling machine. More specifically, by improving the tip used in the rolling tool, the cutting performance is improved and the tip is improved. The cost is reduced.

[0002]

2. Description of the Related Art Conventionally, a milling cutter disclosed in Japanese Patent Publication No. 51-23750 has been known as a rolling tool having a curved cutting edge. In this milling cutter, a tip is brazed at a predetermined position on the outer peripheral portion of the milling body, and an arc-shaped rake face and a flank face are provided on the tip, and a ridge forming the rake face and the flank face has a curved cutting edge. It was made to be.

Further, Japanese Utility Model Publication No. 3-21858 discloses that
There is also a milling cutter in which a tip having a curved cutting edge on a ridge formed by a pair of rake face and flank face on the surface side of the tip is detachably fixed to a tool body.

[0004]

However, since the milling cutter disclosed in Japanese Patent Publication No. 51-23750 is a brazing tool-1 / 5-type, when the cutting edge is worn or the cutting edge is damaged. Requires removing the milling cutter from the machine tool and grinding the tip cutting edge and replacing the entire milling cutter, which increases the tool cost and reduces workability.

Further, in the tool disclosed in Japanese Utility Model Publication No. 3-21858, the tip which is removably fixed to the tool body is provided with only a pair of cutting blades, and the cutting blade can be effectively used. Absent.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. The object of the present invention is to make the cutting edge of a rolling tool a throwaway tip, thereby reducing the tool cost. At the same time, the cutting tool improves the cutting performance by forming a curved cutting edge at each corner of the insert and expands the use area of the cutting edge to greatly improve the economical efficiency of the cutting tool insert. By providing it, the means is to form a curved cutting edge composed of a convex rake face and a flat flank face at a corner portion on the side surface side of a plate-shaped chip.

[0007]

According to the present invention, with the above-described structure, during cutting, the initial cutting is started from the point of the cutting edge, which expands the cutting area as the cutting progresses. Since it can be formed at each corner, the range of use of the tip cutting edge is expanded and the throwaway tip has good cutting performance.

[0008]

An embodiment of the present invention will be described below with reference to the accompanying drawings. The figure shows a chip according to the present invention and a side milling cutter using the chip according to the present invention.

1] is a front view of the chip,

[Figure 2]

[Figure 1] Left side view,

[Figure 3] is

[Fig. 1] Bottom view,

[Figure 4] is

[Figure 1] Back side view,

FIG. 5 is a front view of a main part of a side milling cutter using the chip of the present invention,

[Figure 6] is -2 / 5-

FIG. 5 is a bottom view of FIG.

In the above figures, the side milling cutter body 10
The chip 1 having a substantially quadrangular shape fixed to the chip pocket 101 of No. 0 by the mounting bolt 103 has convex rake faces 11a, 11b, 11c and 11d at the corners thereof from the front surface side 12a to the back surface side 12b. Side surfaces 13a, 13b, 13c, 13
Plane flanks 14a and 14b (other two positions are not shown) are formed in d, and the cutting edges 15a and 15b are formed so that the edges formed by the rake face and the flank have a curved shape. 15
c and 15d.

Further, a mounting hole 10 through which the above-mentioned bolt 103 is inserted is provided in the center of the chip, and chip chip prevention is provided on the front surface side 12a and the back surface side 12b of the chip.
Alternatively, chamfered portions 16a and 16b are provided to facilitate mounting of the main body 100 in the chip pocket 101.

The rake face 11 having the above-mentioned convex shape.
Each of a, 11b, 11c, and 11d may be formed of a part of a cylindrical shape or may be formed of a part of a conical shape.

Then, the rake faces 11a, 1 having a convex shape are provided.
1b, 11c and 11d are cutting blades 1 depending on cutting conditions.
5a, 15b, 15c, and 15d are used with a positive angle or a negative angle.

In the above-mentioned embodiment, the description has been made on the case where the gist of the present invention is formed in the substantially square-shaped tip, but it is also possible to use this by forming the above-mentioned structure in the substantially triangular-shaped tip, and the tool is also used. Not limited to side mills, saws and T
It can be used for a groove milling machine or a metal saw.

The tip 1 configured as described above has a shaft hole 1 which can be inserted into a spindle of a machine tool (not shown) at the central portion.
00a and with the chip pocket 101 having the chip discharge groove 101a on the outer periphery thereof, with the front surface side 12a of the chip in the circumferential posture of the milling cutter, each chip is staggered so as not to cause uncut residue. The cutting blades 15a are arranged and fixed by the bolts 103 so as to participate in the cutting. -3/5

[0015]

The present invention has the following features.
At the time of cutting, the initial cutting starts from the point of the cutting edge, and this expands the cutting area as the cutting progresses.A cutting edge with extremely high cutting efficiency can be formed at each corner of the insert, so that the cutting performance is greatly improved. As a result of the improvement and the effective range of the tip cutting edge, the tip cost is greatly reduced.

[Brief description of drawings]

FIG. 1 is a front view of a chip of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is a bottom view of FIG.

FIG. 4 is a rear view of FIG. 1.

FIG. 5 is a front view of a main part of a side milling cutter using the chip of the present invention.

FIG. 6 is a bottom view of FIG.

[Explanation of symbols]

 1. Chips 11a, 11b, 11c, 11d. Convex rake face 12a. Front side of chip 12b. Back side of chip 13a, 13b, 13c, 13d. Side surface 14a, 14b, flank surface -4 / 5- 15a, 15b, 15c, 15d. Cutting edge 100. Side milling body 103. Mounting bolt-5 / 5-

Claims (1)

[Reference number] 05-002P [Claims] 1. A rolling tool, characterized in that a curved cutting edge composed of a convex rake surface and a flat flank is formed at a corner portion on the side surface side of a plate-shaped chip. Throw away tip.