JPH05310U - Throwaway tip for face milling - Google Patents

Abstract

(57) [Summary] [Purpose] To form a chip breaker groove that divides chips in about one and a half turns. [Structure] A chip breaker groove 2 is formed along a cutting edge 3 of a throw-away tip 1 in a down-centered state. The chip breaker groove 2 has a groove width X of 1.2 <X <in mm.
The groove depth Y is set to 1.8 and the ratio (X
/ Y) is set to 2-6. Honing is applied to the cutting edge 3 to strengthen the cutting edge.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a throw-away insert for face milling, and has an improved insert chip breaker groove for particularly favorable chip disposal.

[0002]

[Prior Art]

 Conventionally, as throw-away inserts for face milling of this kind, those found in, for example, Japanese Patent Publication No. 47-51309 and Japanese Utility Model Publication No. 1-15456 have been disclosed.

The former is a sharpened chip breaker groove in which a chamfer portion is cut out, and the latter is a mold type chip breaker groove in which a blind groove is formed.

[0004]

[Problems to be solved by the device]

 However, the chip breaker groove seen in the above-mentioned publication is not always satisfactory in cutting chips, and the development of a more improved chip breaker groove has been a problem.

In view of the above, the present invention is intended to provide a throw-away tip for a face milling machine provided with a chip breaker groove capable of dividing chips in about one and a half turns.

[0006]

[Means for Solving the Problems]

 The present invention has been made in view of the above points, and has been improved on the premise of a throw-away tip for face milling in which a tip breaker groove is formed in a center-down state. That is, the chip breaker groove is set to have a narrow groove width X (mm) of 1.2 <X <1.8 in order to force curl, and the groove depth Y for this is set to be the groove width X. It is configured such that the ratio (X / Y) of 2 is deeply set to 2 to 6, and the cutting edge is subjected to honing treatment.

[0007]

[Action]

 The tip breaker groove of the throw-away tip for face milling in the present invention acts to forcibly curl chips and divide them into about one and a half turns. This is achieved by locating the cutting edge ridge down, narrowing the breaker groove width and increasing the groove depth.

[0008]

【Example】

 Hereinafter, an embodiment of a throw-away tip for face milling of the present invention will be described with reference to the drawings.

In FIGS. 1 (a) (b) and FIG. 2, reference numeral 1 denotes a throw-away tip for a positive face milling cutter having a substantially square plate shape, and a chip breaker groove 2 is formed on a side portion thereof. It is formed along the blade edge 3.

The chip breaker groove 2 is located below the upper surface 4 which constitutes the rake surface for cutting, and as shown in FIG. It is formed by the depth Y and the raised portion 5. The groove width X of the chip breaker groove 2 is set to 1.2 <X <1.8 in mm units, which is narrower than the normal one, and the groove depth Y for this is set to the ratio of the groove width X ( X / Y) is set to 2 to 6 deeper than usual. As shown in FIG. 6, this is a consideration for breaking the chips in about one and a half turns. In this case, the comparative product of FIG. 6 shows chips obtained by cutting the throw-away tip 1 having no tip breaker groove 2, and is a long chip that is continuous in several windings.

Further, in the case of FIG. 2, the cut-up portion 5 on the upper surface from the chip breaker groove 2 is formed by the radius of curvature R. In this case, the radius of curvature R is usually set in the range of 0.7 to 1.3 mm. The raised portion 5 can be used in the case of combination with a straight line as shown in FIGS. 3 (a) and 3 (b) and in the case of a two-stage straight line as shown in FIG. 3 (c).

Further, FIG. 4 shows the inclination angle α at the groove bottom surface of the chip breaker groove 2, and the inclination angle α is usually set within the range of −6 ° <α <+ 7 °.

In the front milling cutter 10 shown in FIG. 5, the throwaway tip 1, the locator 13 and the wedge 14 are incorporated in the mounting groove 12 of the tool body 11, and the throwaway tip in the tip seat 15 of the locator 13 is incorporated. The tip 1 is fixed by means of a wedge 14 with screws 16. In this case, the locator 13 is fixed by the screw 17. The front milling cutter 10 cuts the work material 18, but when the work material 18 is carbon steel or the like, cutting is performed in the range of feed per blade = 0.05 to 0.25.

7 (a), (b) to 9 (a), (b) show modifications of the throw-away tip 1, and 7 (a), (b) show chip breakers all around. The groove 2 is formed. 8 (a) and 8 (b) show the chamfer 6 formed on the nose portion of the throw-away tip 1. In FIGS. 9 (a) and 9 (b), the nose portion has an arc due to the radius of curvature. The present invention relates to a negative chip formed into a shape.

In the throw-away tip 1 thus configured, the cutting edge 3 formed by intersecting the flank 6 is subjected to a honing treatment for strengthening the cutting edge. . In the case of angle honing, for example, in the case of angle honing, an angle range of 10 ° to 30 ° and a width of about 0.05 to 0.2 mm is applied, and in the case of round honing, the radius of curvature is 0. It is given in the range of 0.03 to 1.0 mm.

[0016]

[Effect of the device]

 In the present invention, as described above, the chip breaker groove 2 is formed along the cutting edge 3 so as to be located below the core, and the width X and the depth Y thereof are set within predetermined ranges, and the cutting edge 3 In this case, since the honing process is applied, the chips are forcibly curled, and the chips are broken in about one and a half turns. Therefore, chip disposal in the face mill is performed well, which is effective for unmanned operation.

[Brief description of drawings]

FIG. 1 is a view showing a throw-away tip for a face milling machine of the present invention, (a) is a front view, (b) is a side view,

FIG. 2 is a partially enlarged cross-sectional view taken along the line AA in FIG.

FIG. 3 is a partially enlarged cross-sectional view showing modified examples of cut-up portions in (a) to (c),

FIG. 4 is a partially enlarged sectional view showing a tilt angle α of a groove bottom surface portion,

FIG. 5 is a partial front view of a front milling cutter incorporating a throw-away tip for the front milling cutter of the present invention,

FIG. 6 is an explanatory view showing the situation of chips obtained by cutting the device of the present invention and the comparative product;

FIG. 7 is a view showing a modified example of the throw-away tip for face milling of the present invention, (a) is a front view, and (b) is a view.
Is a side view,

8A and 8B are views showing a modified example, where FIG. 8A is a front view and FIG.
Is a side view,

9A and 9B are views showing a modified example, in which FIG. 9A is a front view and FIG.
Is a side view.

[Explanation of symbols]

 1 Throw-away tip 2 Tip breaker groove 3 Cutting edge 4 Upper surface 5 Cutting up portion 6 Relief surface

Claims (1)

[Claims for utility model registration] [Claim 1] A chip breaker groove 2 is formed in a down-centered state along a cutting edge ridge 3 on the upper surface 4 side that forms a rake surface in the shape of a polygonal plate or a circular plate. In the throw-away insert for face milling configured as described above, the chip breaker groove 2 has a groove width X (mm) set within a range of 1.2 <X <1.8, and a groove depth at the cut-up portion. Y is groove width X
The cutting edge 3 which is set to have a ratio (X / Y) to 2 to 6 and is formed by the intersection with the flank
The insert is a throw-away tip for face milling, which is characterized by honing.