JPH0611904U - Positive type throw-away tip - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To extend the life of positive type throw-away chips and reduce chip cost. A plate-shaped cutting tip 1 having a polygonal shape, the flank 11 of which forms a regular angle, and the flank 11 and the rake face 13 are formed by a sintered textured surface to form a flank. The honing 14a is formed on the cutting edge formed by the rake face.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tip that is used by being fixed to a tool body for cutting metal or the like. More specifically, it is a positive type throw-away tool that is detachably fixed to a body of a rolling tool or a turning tool. It relates to chips.

[0002]

[Prior art]

 Conventionally, the pogy type throw-away tip, which has been detachably fixed to the main body of a turning tool or a rolling tool and used for cutting, is formed by a sintering method and then the entire surface is subjected to grinding processing. Therefore, many molded products having a desired shape are used. Further, as shown in FIG. 4, the rake face 21 side of the chip 2 is molded with a sintered surface having a predetermined shape, and the flank face 22 side is negative for a predetermined value t (0.1 to 0.2 mm). There is also a chip formed by sintering while leaving the flat surface 24. For the purpose of improving the machinability of the tip 2 described above, there is also a tip in which only the flank 22 side of the tip is ground to form a desired positive flank 25.

[0003]

[Problems to be solved by the device]

 However, if the entire surface of the chip described before is ground, the chip cost is increased by the grinding process after sintering. Further, a chip having a negative surface with a width t of 0.1 to 0.2 mm formed on the flank 22 side has cutting performance close to that of a negative type chip, and the desired performance cannot be obtained. Further, the grinding of only the flank 22 side of the chip has a problem in cost, and the wear resistance of the flank is promoted to shorten the life of the chip.

[0004]

[Means for Solving the Problems]

 The present invention has solved the above problems by the following means. That is, a plate-shaped polygonal cutting tip is formed, the flanks of which form a regular angle, and the flanks and the rake face are formed by leaving a sintered surface, and the flanks and the rake face are formed. The above-mentioned problems are solved by a positive type throw-away tip in which honing is formed on the cutting edge ridge formed by and. ．

[0005]

[Function of the device]

 According to the present invention, by the above-mentioned means, the flank surface and the rake surface are composed of the sintered ground surface which is higher in strength than the ground surface, and the shape of the tip is a positive type with extremely excellent machinability. . Therefore, the life of the chip is greatly extended without deteriorating the cutting performance. The cost of chips is greatly reduced. ．

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

From [Figure 1]

[Fig. 3] shows a chip according to the present invention,

[Figure
▲ 1] is a front view,

[Figure 2]

1 is a sectional view of FIG.

[Figure 3] is

[Figure 2]
Enlarged view of part A of

[Figure 4] is a conventional chip,

2 is an enlarged view of a portion corresponding to a portion A in FIG. In the figure, a triangular (quadratic or rectangular) plate-shaped chip 1 has a recess 10 for clamping a tool body (not shown) in the center, and a predetermined regular angle (example). Is provided with a flank 11 and a rake face 13 is provided on the upper surface 12 side. The rake face 13 may be a flat face, but in this embodiment, a breaker groove 13a is formed in order to improve the cutting property and the chip discharging property. Then, the upper surface 12 side and the flank surface 11 side are made to have a sintered surface, and the cutting edge 14 constituted by the flank surface 11 and the rake surface 13 is provided with a honing 14a of 0.08R or less. There is. Although the R honing is used in the embodiment, it may be an angle honing. Further, it is convenient to form a flat surface on the lower surface 15 by grinding in order to make the fitting of the tool body (not shown) to the tip seat accurate and to improve the adhesiveness.

[0007]

[Effect of device]

 As described above, according to the present invention, since the flank surface and the rake surface of the positive type chip are constituted by the sintered surface having a higher strength than the ground surface, the ground type Compared with a positive type chip that is ground and has the same machinability as the chip, the chip life is greatly extended and the chip cost is greatly reduced.

[Brief description of drawings]

From [Figure 1]

[Fig. 3] shows a chip according to the present invention,

[Figure 1] is a front view ”,“

[Figure 2]

[Figure 1] Sectional view ”,“

[Figure 3] is

FIG. 2 is an enlarged view of part A of FIG.

[Figure 4] is a conventional chip

2 is an enlarged view of a portion corresponding to part A in FIG.

[Explanation of symbols]

1.2 --- Chip 11.22 --- Flanking surface 13.
21 --- rake face 14.23 --- cutting edge 15-
−−Bottom surface

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped polygonal chip for cutting, wherein the flank has a regular angle, and the flank and the rake face are molded by leaving a sintered background, and the flank is formed. A positive type throw-away tip having a honing formed on a cutting edge formed by a face and a rake face.