JPH0680514U - Throw-away tip and throw-away cutter - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an effective throw-away tip having a concave cutting edge and efficiently perform shared cutting with a throw-away cutter incorporating this. [Structure] The throw-away tip 1 is made of a substantially regular polygonal plate, and at least one central concave groove 3 is formed on the maximum surface or the side surface in the thickness direction.
The concave curved ridge 4 formed by the central concave curved groove 3 is involved in cutting as a cutting edge ridge. The throw-away cutter, in which a plurality of these throw-away tips 1 are incorporated into the cutter body,
The concave curved ridges 4 continuously form a concave cutting edge.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a throw-away tip and a throw-away cutter, and more particularly, to a reasonably configured concave groove edge.

[0002]

[Prior art]

 Conventionally, this type of cutter has generally been applied in which a cutting edge chip having a concave cutting edge is brazed to the cutter body, and regrinding is performed according to the wear of the cutting edge.

[0003]

[Problems to be solved by the device]

 Therefore, the development of throw-away cutters and throw-away inserts to be incorporated into them has become a problem due to the economics of re-grinding tools and rational cutting edge configurations.

In view of the above, the present invention is to provide a throw-away cutter and a throw-away tip incorporated therein, which are suitable from the viewpoint of tool rigidity and cutting edge configuration.

[0005]

[Means for Solving the Problems]

 The present invention has been made in view of the above, and the throw-away tip incorporated in the disc-shaped cutter body has a substantially regular polygonal plate as a basic shape, and its regular polygonal surface or thickness direction. A central concave groove is formed on the side surface of the. When a plurality of indexable inserts are incorporated in the cutter body, the concave curved edges formed by the central concave groove continuously form a concave cutting edge on the rotation locus.

[0006]

In the throw-away tip of the present invention, the central concave groove is formed on the maximum surface or the side surface in the thickness direction, and the concave ridge formed by the central concave groove is involved in cutting as a cutting edge ridge.

In the throw-away cutter of the present invention, the concave curved edge formed on the throw-away tip continuously cuts and cuts the work material on the rotation locus.

[0008]

【Example】

 Hereinafter, the throw-away tip and the throw-away cutter will be described with reference to the drawings.

In FIGS. 1A to 1D, reference numeral 1 denotes a throw-away tip having a square plate shape, and a central mounting hole 2 is formed in the square surface of the throw-away tip, and one of opposite sides thereof is formed. A central concave groove 3 is formed in the. The two concave curved ridges 4 formed by the central concave curved groove 3 become cutting edge ridges during cutting.

FIGS. 2 (a) to 2 (d) show a central concave groove 3 formed in a single letter on both sides of a square, and FIGS. 3 (a) to 3 (d) show a cross in a single letter on one side. The central concave groove 3 is formed. In addition, FIGS. 4 (a) to (d) are formed by forming the central concave groove 3 in a single letter on both sides in different directions, and FIGS. A central concave groove 3 is formed. In each of these examples, the indexable insert 1 having a square surface was used. It is applicable to those with. Further, these throw-away tips 1 can be applied to both single-sided and double-sided use. Further, although the central concave groove 3 is formed on the maximum surface side, it may be formed on the side surface in the thickness direction as long as the concave ridge 4 is involved as a cutting edge ridge.

The throw-away tip 1 configured as described above is assembled into the cutter body 11 having the central mounting hole 10 as clearly shown in FIGS. 6 to 8. This is done in the tip seat 13 formed in 12, for example using the central mounting hole 2 and the set screw 14. In this case, in the throw-away tip 1, the side surface in the thickness direction is located on the chip pocket 15 side to form a rake surface for cutting, and the square surface forms a flank surface. As a result, the central concave groove 3 is located on the flank side, and the concave curved edge 4 constitutes a cutting edge. In addition, in the present embodiment, the throw-away tips 1 are alternately arranged on the left and right sides to form a so-called staggered blade. When the throw-away tip 1 is attached, the rake angle α in the axial direction is set to -5 ° and the rake angle β in the radial direction is set to -11 °.

FIG. 9 is an explanatory view on a conceptual rotation locus when cutting a corner portion of a work material 16 made of L-shaped steel, showing a concave curve of a throw-away tip 1 in which hatching portions are arranged in a staggered arrangement. It is cut by the ridges 4a and 4b.

10 to 12 show a large number of the throw-away tips 1 arranged in a staggered manner so that a large radius of curvature of the scraped portion can be dealt with. In this case, the number of the throw-away tips 1 located on the center side is set to be a multiple of the number of the throw-away tips 1 located on the outer peripheral side. Further, in the illustrated case, the rake angle α in the axial direction is set to -5 ° and the rake angle β in the radial direction is set to -11 °.

FIG. 13 to FIG. 15 show another type of throw-away cutter, in which not only the throw-away tip 1 having a concave curved edge 4 but also a throw edge having a straight cutting edge for cutting other right-angled portions. The away chips 17 and 18 are incorporated. Then, in the case of the drawing, the throw-away tip 1 is formed with a central concave groove 3 having a letter shape on the flank side.

In the present embodiment, the central concave groove 3 formed in the throw-away tip 1 is applied to the one located on the flank side when assembled in the cutter body 11. , It can also be applied to those located on the rake side. In this case, it can be fixed by a wedge not shown. Further, the indexable insert 1 having the central concave groove 3 formed on the side surface in the thickness direction can also be attached in the same manner.

[0016]

[Effect of device]

 In the present invention, as described above, the central concave groove 3 is formed on the maximum surface or the side surface in the thickness direction of the throw-away tip 1, and the concave ridge 4 is used as the cutting edge ridge for cutting. Further, when incorporated into the cutter body 11, since the plurality of concave curved edges 4 share the cutting, the throw-away tip has high rigidity and effective cutting can be expected.

[Brief description of drawings]

FIG. 1 is a view showing an embodiment of a throw-away tip of the present invention, (a) is a front view, (b) is a side view, (c) is a bottom view, and (d) is a perspective view.

FIG. 2 is a view of a throw-away tip showing another embodiment, (a) is a front view, (b) is a side view, (c) is a bottom view, and (d) is a perspective view.

3A and 3B are views of a throw-away tip according to another embodiment, FIG. 3A is a front view, FIG. 3B is a side view, FIG. 3C is a bottom view, and FIG.

FIG. 4 is a drawing of a throw-away tip showing another embodiment, (a) is a front view, (b) is a side view, (c) is a bottom view, and (d) is a perspective view.

5A and 5B are views of a throw-away tip showing another embodiment, FIG. 5A is a front view, FIG. 5B is a side view, FIG. 5C is a bottom view, and FIG.

FIG. 6 is a plan view showing an embodiment of the throw-away cutter of the present invention.

FIG. 7 is a partial front view.

FIG. 8 is a partial cross-sectional view.

FIG. 9 is a conceptual explanatory diagram showing a rotation trajectory and a cutting state of a throw-away tip with respect to a work material.

FIG. 10 is a partial plan view showing another embodiment of the throw-away cutter of the present invention.

FIG. 11 is a partial front view.

FIG. 12 is a partial cross-sectional view.

FIG. 13 is a plan view showing another embodiment of the throw-away cutter of the present invention.

FIG. 14 is a partial front view.

FIG. 15 is a partial cross-sectional view.

[Explanation of symbols]

 1 Throw-away tip 2 Center mounting hole 3 Center concave groove 4 Concave curved edge 10 Center mounting hole 11 Cutter body 13 Tip seat 14 Set screw 15 Chip pocket 16 Work material

Claims (4)

[Scope of utility model registration request] 1. A throw-away tip (1) having a substantially regular polygonal plate as a basic shape, wherein a central concave curved groove (3) based on at least one side is formed on at least one of the maximum faces having a polygonal shape, and A throw-away tip characterized in that the concave curved ridge 4 formed by the central concave curved groove 3 is involved in the cutting as a cutting edge ridge during cutting. 2. The central concave curved groove 3 according to claim 1,
The throw-away tip according to claim 1, wherein at least one is formed on the side surface in the thickness direction. 3. The throw-away tip 1 according to claim 1 or 2, wherein the side face in the thickness direction is a rake face,
A throw-away cutter in which a plurality of maximum surfaces are incorporated into the cutter body 11 so as to form a flank, and the concave curved ridges 4 are continuous to form a concave cutting edge on the rotation locus. . 4. The throw-away tip 1 according to claim 1 and claim 2 is incorporated so that the side surface in the thickness direction constitutes a flank surface and the maximum surface side constitutes a rake surface, and in addition, on a rotational trajectory, A throw-away cutter in which the concave curved ridges 4 are continuous to form a concave cutting edge.