JPH03107120U

JPH03107120U -

Info

Publication number: JPH03107120U
Application number: JP1990016595U
Authority: JP
Priority date: 1990-02-21
Filing date: 1990-02-21
Publication date: 1991-11-05

Description

[Brief explanation of drawings]

第１図は本考案の一実施例であるエンドミルの
刃部を示す正面図である。第２図は第１図のエン
ドミルの先端側からの視図である。第３図は第１
図のエンドミルの外周面を展開した状態における
外周刃の形状を示す図である。第４図は本考案の
他の実施例における外周刃の形状を説明する図で
、第３図に相当する図である。第５図は本考案の
更に別の実施例における外周刃の形状を説明する
図で、第３図に相当する図である。第６図乃至第
８図はそれぞれ従来のフライスの外周刃の形状を
説明する図で、何れも第３図に相当する図である
。｛１２，１４，１６，１８、１４′，１６′，
１８′｝外周刃、θ_１〜θ_５……ねじれ角。 FIG. 1 is a front view showing the blade portion of an end mill that is an embodiment of the present invention. FIG. 2 is a view from the tip side of the end mill shown in FIG. 1. Figure 3 is the first
It is a figure which shows the shape of the outer peripheral blade in the state where the outer peripheral surface of the end mill of a figure is developed. FIG. 4 is a diagram illustrating the shape of the peripheral blade in another embodiment of the present invention, and is a diagram corresponding to FIG. 3. FIG. 5 is a diagram illustrating the shape of the peripheral cutter in yet another embodiment of the present invention, and is a diagram corresponding to FIG. 3. FIGS. 6 to 8 are diagrams each illustrating the shape of the peripheral cutting edge of a conventional milling cutter, and each corresponds to FIG. 3. {12, 14, 16, 18, 14', 16',
18'} Peripheral cutting edge, θ ₁ to _{θ 5} ... Helix angle.

Claims

[Claims for Utility Model Registration] (1) A milling cutter in which a plurality of peripheral cutting edges having a predetermined helix angle are formed on the outer peripheral surface, the helix angle being such that the outer peripheral surface can be curved in an unfolded state. a first circumferential cutter whose width is gradually and smoothly changed in the axial direction; and a distance between the first outer cutter and the first circumferential cutter whose circumferential distance is gradually and smoothly changed as it progresses in the axial direction, and whose spacing is gradually and smoothly changed in the axial direction; A milling cutter, characterized in that second peripheral blades, the helix angle of which is determined to be maximum or minimum at certain positions, are provided alternately in the circumferential direction. (2) The helix angle of one of the peripheral blades is gradually increased as the first and second peripheral blades advance in the axial direction so that the peripheral surfaces of the first and second peripheral blades are curved in opposite directions to each other in the unfolded state. The milling cutter according to claim 1, wherein the helix angle of the other peripheral cutting edge is gradually decreased.