JP2556519Y2 - Indexable tip - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throw-away chip.

[0002]

2. Description of the Related Art Conventionally, in the case of high feed machining, if a breaker provided with a plurality of protrusions 102 in a breaker groove 101 as shown in FIG. 3 is used, chips coming from the nose 103 to the breaker groove 101 via the land 104 will be removed. Although the chips are curled and hit by the projections 102, the chips are clogged and the resistance is increased, so that the chips are easily damaged.

A general high-feed breaker having a breaker groove 205 having a downwardly inclined surface 203 and an upwardly inclined surface 204 between a land 201 and a boss surface 202 as shown in FIG. However, there is a problem that chips are not cut in the middle cutting area although the resistance is small. For this reason, as shown in FIG. 5, a wide breaker groove 303 is provided between the wide land 301 and the boss surface 302 so that the boss surface 30
A general-purpose breaker is provided which has a downward inclined surface 305 descending from the land 301 toward 2 and an upward inclined surface 306 connected to the boss surface 302, and the boss surface 302 becomes a band-shaped embankment portion toward the nose 307. However, when using the throw-away insert and performing machining under rough cutting conditions, the chips are thick and hard chips are generated, and the chips are formed on the downwardly inclined surface 305.
From above, it slides up the breaker groove 303 and hits the inclined surface 306, so that it is curled with a large radius of curvature, and is smoothly cut into chips. Moreover, the provision of the wide lands 301 enabled stable processing with high edge strength.

[0004] However, in the low cutting and low feed medium cutting area, the chips slide from the down slope 305 to the breaker groove 303, but do not reach the up slope 306 and do not collide with the up slope 306. However, the chips were surely stretched without being curled.

[0005]

As described above, in the conventional insert, high-feed machining can separate chips and can perform good machining. However, a breaker that can perform good chip processing even in medium cutting can be used. The development of a chip equipped with it is awaited.

[0006]

In view of the above circumstances, the present invention improves the breaker groove at the tip of the tip,
In order to develop a throwaway insert that can increase the chip processing range from high feed to medium cutting area while maintaining the edge strength by improving the breaker depth, the polygonal plate shape is used. A wide land 1 and a breaker groove 12 are formed on one or both peripheral edges of the upper and lower surfaces over the entire circumference, and a boss surface 2 of a strip-shaped embankment portion is formed in the center toward the nose 3. In the insert, from the cutting edge 11 to the boss surface 2
Angle of depression α having a depth H ₁ to the breaker groove 12 toward
Is formed so as to have a breaker depth of H ₂ at the rising slope 14 having a depression angle β from the boss face 2, and a concave breaker groove 15 deeper than H ₂ is formed near the nose 3. Then, a downward slope 13 having a depression angle α is extended so as to have a depth of H ₃ from the cutting edge 11, and W ₁ is extended from the tip of the nose 3.
From the position of the nose 3 to the tip of the nose.
The result was consecutively _{provided, H 1 = 0.05~0.15mm, H 2} = 0.1~0.2mm, H 3 = 1.5H 2 ~2.0H 2, α = 15~30 °, β = 15~30 °, γ = This is a throw-away tip set at 10 to 25 ° and W ₁ = 1.0 to 2.0 mm.

[0007]

[Effect] When machining is performed in a medium cutting area with a low depth of cut and a low feed, chips are formed from the downwardly inclined surface 13 into a concave breaker groove 15.
And collides with the rising slope 16, and is curled and divided. Under rough machining conditions, chips fly over the concave breaker groove 15 from the downwardly inclined surface 13, slide on the breaker groove 12, and collide with the upwardly inclined surface 14, so that the chips are smoothly divided without being clogged.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on a specific embodiment shown in the accompanying drawings. As shown in FIG. 1, a wide land 1 is formed on the upper peripheral edge of a polygonal plate-shaped throw-away chip, and a boss surface 2 is formed in a strip-shaped embankment portion toward a nose 3.

A downwardly inclined surface having a depression angle α so as to have a depth H ₁ from the cutting edge ridge 11 toward the boss surface 2 to the breaker groove 12.
13 is formed, and H is formed on the inclined surface 14 with a depression angle β rising from the boss surface 2.
_It is configured to have a breaker depth of ₂ . Nose 3
A concave breaker groove 15 is formed near the cutting edge 11.
A downward inclined surface 13 having a depression angle α is extended so as to have a depth of H ₃ , and is connected to the breaker groove 12 by an upward inclined surface 16 having a depression angle γ in the direction of the nose 3 from the position of W ₁ from the tip of the nose 3. .

Here, H ₁ = 0.05 to 0.15 mm, H ₂ = 0.1 to
_{0.20mm, H 3 = 1.5H 2 ~2.0H} 2, α = 15~30 °, β = 1
Set 5 to 30 °, γ = 10 to 25 °, and W ₁ = 1.0 to 2.0 mm.
In this, H ₁ is 0.15mm or more, also, H ₂ is 0.2mm or more,
When α and β are 30 ° or more, chips tend to be clogged. Conversely, when H ₁ is 0.05 mm or less, H ₂ is 0.1 mm or less, and α and β are 15 ° or less. This is because the chips grow.

Also, a concave breaker groove near the nose 3
This also applies to 15, H ₃ is 2.0H ₂ or more, gamma is clogged if chip 25 ° or more, H ₃ is 1.5 H ₂ or less, alpha resulting in elongation chips if 10 ° or less. Further, W ₁ is H ₃ = 1.5H _2-
2.0H _2, α = 15~30 °, be set to gamma = 10 to 25 °, the chip if 2.0mm or more leads under deterioration of clogging edge strength, W ₁ is divided is if chips 1.0mm or less Disappears.

When machining is performed in the medium cutting area with low cutting depth and low feed with the throw-away insert configured as described above, chips slide from the downwardly inclined surface 13 through the concave breaker groove 15 and move to the upwardly inclined surface 16. Collide, curl and split. Further, under rough machining conditions, the chips fly over the concave breaker groove 15 from the downward slope 13, slide on the breaker groove 12 and collide with the upward slope 14, so that the chips are smoothly divided without being clogged.

Further, the provision of the wide land 1 does not cause any deterioration in the edge strength. FIG. 2 shows a comparison between the throw-away tip of the present invention and a conventional throw-away tip with a levee and a general-purpose breaker. The cutting conditions are as follows: cutting speed V = 150 m / min, work material is SCM435, the abscissa represents the depth of cut (mm), and the ordinate represents the feed (mm / rev.). It can be seen that the use range of the product A of the present invention is wider than that of the conventional product B.

[0014]

As described above, the present invention has a polygonal plate shape, and a wide land 1 and a breaker groove 12 are formed over one or both peripheral portions of the polygonal upper and lower surfaces over the entire circumference. In each of the throw-away chips formed with the boss surface 2 of the band-shaped embankment portion toward the nose 3 at the center, a depression angle α having a depth H ₁ from the cutting edge 11 to the breaker groove 12 toward the boss surface 2. Is formed so as to have a breaker depth of H ₂ at the rising slope 14 having a depression angle β from the boss face 2, and a concave breaker groove 15 deeper than H ₂ is formed near the nose 3. Then, a downward slope 13 having a depression angle α is extended so as to have a depth of H ₃ from the cutting edge 11, and the nose 3 is moved from the tip of the nose 3 to a position W _1.
In the direction, an upward slope 16 with a depression angle γ is continuously provided, H ₁ = 0.05 to 0.15 mm, H ₂ = 0.1 to 0.2 mm, H ₃ = 1.5H _{2 to} 2.0H ₂ , α = 15 to 30 °, Since the insert is a throw-away insert with β = 15 to 30 °, γ = 10 to 25 °, and W ₁ = 1.0 to 2.0 mm, the chip processing range can be widened from high feed to medium cutting area.

[Brief description of the drawings]

FIG. 1 is a two-sided view of a specific embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between cutting and feeding of the throw away tip of the present invention and a conventional throw away tip.

FIG. 3 is a two-sided view of a conventional throw-away tip.

FIG. 4 is a two-sided view of another conventional throw-away tip.

FIG. 5 is a two-view drawing of yet another conventional throw-away tip.

[Explanation of symbols]

 1 ... wide land 3 ... nose 2 ... boss surface 11 ... cutting edge 13 ... downward slope 14 ... upward slope 15 ... concave breaker groove 16 ... upward slope

Claims (1)

(57) [Scope of request for utility model registration] 1. It has a polygonal plate shape and presents its polygonal shape.
Wide land on one or both edges
1 and breaker groove 12 are formed all around
Then, the boss face of the strip-shaped embankment toward the nose 3 in the center
In the indexable insert having the cutting edge 2, the cutting edge 11
From the head to the boss surface 2 to the breaker groove 12₁To
To form a downward inclined surface 13 having a depression angle α,
H at the rising slope 14 of the angle β_TwoHaving a breaker depth of
In the vicinity of the nose 3 _TwoEven deeper concave
Forming a breaker groove 15 of H_ThreeThe depth of
Extend the downward slope 13 with a depression angle α so that it has
W from the end₁Angle of inclination γ in three directions of nose
The slopes 16 are connected continuously.₁= 0.05-0.15mm, H_Two= 0.1-0.2mm, H_Three= 1.5H_Two
~ 2.0H_Two, Α = 15-30 °, β = 15-30 °, γ = 10-25 °, W₁= 1.0
Throwaway tip set to ~ 2.0mm.