JPH042504U

JPH042504U -

Info

Publication number: JPH042504U
Application number: JP4187990U
Authority: JP
Priority date: 1990-04-19
Filing date: 1990-04-19
Publication date: 1992-01-10
Anticipated expiration: 2005-04-19
Also published as: JP2565480Y2

Description

[Brief explanation of the drawing]

第１図ないし第５図は本考案の一実施例を示す
もので、第１図は平面図、第２図は側面図、第３
図は第１図の−線における断面図、第４図は
第１図の−線における断面図、第５図は第１
図の−線における断面図、第６図は凸部の傾
斜部を変形した例を示す断面図、第７図はチツプ
の全体形状を変形した例を示す断面図、第８図は
第１図に示すチツプの切削試験で得られた切屑処
理範囲をその比較例とともに示す図、第９図及び
第１０図は従来例を示す図で、第９図は平面図、
第１０図は第９図の−線における断面図、第
１１図ないし第１３図は他の従来例を示す図で、
第１１図は平面図、第１２図は第１１図の−
線における断面図、第１３図は第１１図の−
線における断面図である。１０……上面、１３……ボス面、１５……ノー
ズ部、１６……切刃、１７……凹部、１７ａ……
凹部底面、１８……凸部、１９……傾斜部、２１
……等高部、β……傾斜部の最大傾斜角、ｈ_１…
…等高部と切刃との高さの差。 Figures 1 to 5 show an embodiment of the present invention, in which Figure 1 is a plan view, Figure 2 is a side view, and Figure 3 is a side view.
The figure is a cross-sectional view taken along the - line in Figure 1, Figure 4 is a cross-sectional view taken along the - line in Figure 1, and Figure 5 is a cross-sectional view taken along the - line in Figure 1.
6 is a sectional view showing an example in which the slope of the convex portion is modified; FIG. 7 is a sectional view showing an example in which the overall shape of the chip is modified; FIG. 8 is the same as in FIG. 1. Figures 9 and 10 are diagrams showing conventional examples; Figure 9 is a plan view;
FIG. 10 is a sectional view taken along the - line in FIG. 9, and FIGS. 11 to 13 are views showing other conventional examples.
Figure 11 is a plan view, Figure 12 is the - of Figure 11.
13 is a cross-sectional view along the line shown in FIG. 11.
FIG. 10...Top surface, 13...Boss surface, 15...Nose portion, 16...Cutting blade, 17...Concave portion, 17a...
Concave bottom surface, 18... Convex portion, 19... Inclined portion, 21
... Contour section, β ... Maximum inclination angle of slope section, h ₁ ...
...Difference in height between the contour part and the cutting edge.

Claims

[Claims for Utility Model Registration] (1) It has a polygonal flat plate shape, and at the apex portion of at least one of the upper and lower surfaces 10 and 12 exhibiting the polygon, there are, in order from the periphery toward the inner boss surface 13, A cutting blade 16 having an arcuate nose portion 15 and a recess 17 extending along the cutting blade 16 and forming a rake surface of the cutting blade 16 are formed. This throwaway chip is formed with a convex portion 18 extending from the vicinity toward the boss surface 13, and the convex portion 18 gradually increases in height as it goes from the nose portion 15 toward the boss surface 13. It has a sloped part 19 whose height increases, and a contoured part 21 which extends continuously from the rear end of this sloped part 19 and whose rear end reaches the boss surface 13 and has a substantially constant height, The tip of the inclined portion 19 is provided so as to approach the nose portion 15 side beyond the center of curvature _P2 of the nose portion 15, and the boss surface 1
The maximum inclination angle β with respect to the cutting edge 16 is set in the range of 15° to 25°, and the height of the equal height portion 21 is
Throwaway tip characterized by being formed to be higher than. (2) The throw-away tip according to claim 1, wherein a difference _h1 between the height of the contoured portion 21 and the height of the cutting edge is set in a range of 0.1 mm to 0.3 mm. (3) The throw-away according to claim 1 or 2, wherein the convex portion 18 is formed so that a cross-sectional shape perpendicular to its extending direction forms a smoothly continuous convex curve. Chip.