JPS58150401U - Throwaway tip - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a conventional indexable insert having a breaker groove, and FIG. 2 is an enlarged plan view of the vicinity of a part of the corner of FIG. FIG. 3 is a plan view showing another example of a conventional indexable tip having a breaker groove, and FIG. 4 is an enlarged plan view of a part of the corner of FIG. 3 and its vicinity. FIG. 5 is a feed amount-depth of cut area diagram showing the chip control performance of the conventional indexable insert shown in FIG. FIG. 6 is a plan view showing yet another conventional indexable tip, and FIG. 7 is an enlarged plan view of a part of the corner of FIG. 6 and its vicinity. FIG. 8 is a region diagram of feed amount and depth of cut showing the chip control performance of the conventional indexable insert shown in FIG. 6. FIG. 9 is a plan view of a throw-away tip showing the first embodiment of the present invention, and FIGS. 10 and 11 are an enlarged plan view of a part of the corner of FIG. A
FIG. Figure 12 shows the second example of the present invention.
FIG. 3 is an enlarged plan view of the vicinity of a part of the corner of the indexable tip showing an example of the present invention. FIG. 13 is a field diagram of the feed amount vs. depth of cut showing the chip control performance of the indexable insert of the example of the present invention shown in FIG. 14, 15 and 16 show other application examples of the present invention.
The figure is an enlarged plan view of the vicinity of a part of the corner, FIG. 15 is a plan view of the indexable tip, and FIG. 16 is a side view of the indexable tip. 1 Niss throwaway tip, 2: Peripheral cutting edge, 3: Flaker groove, 4: Central land, 5: Part of corner, 6: Projection,
7: Ridge of the protrusion, 8: Intersection line between the plane parallel to the upper surface and the protrusion, 9: Point on the bisector of the corner of the ridge or intersection line of the protrusion, 10: Protrusion relative to the linear peripheral cutting edge 11: Breaker-groove bottom. Fig. 9 Fig. 6 4 7 Fig. wf, l1

Claims (1)

[Scope of utility model registration request] It has a polygonal plate shape, and a breaker groove 3 is provided along the entire circumference of the outer peripheral cutting edge 2 on at least one upper surface forming the polygon.
In the indexable tip 1 provided with the breaker groove 3, a protrusion 6 is formed from the remaining central land portion 4 toward the corner portion 5 into the breaker groove 3. The intersection line 8 of the ridge 7 or a plane parallel to the upper surface and the protrusion 6 intersects on the bisector of the corner with an arc convex toward the cutting edge, and the intersection line 8 of the ridge 7 or the intersection line 8 at the intersection 9 The angle θ between the tangent and the bisector of the corner is
A throw-away tip characterized in that the angle forming the corner is less than or equal to a bisector and greater than or equal to a quarter of the angle.