JPS6332715U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本考案に係るエンドミルの一例とし
て４枚刃のエンドミルを底刃の方向から見て示す
正面図、第２図は第１図を―線で切断して見
る断面図、第３図は第１図を矢印の方向から見
た図、第４図は本考案に係るエンドミルの刃立て
の様子を模式的に示す図、第５図はエンドミルに
よる正面切削の様子を模式的に示す図、第６図は
従来技術のエンドミルによつて正面切削された被
切削面を示す拡大断面図、第７図は従来技術のエ
ンドミルによつて正面切削された被切削面を示す
平面図、第８図は従来技術によるエンドミルを底
刃の方向から見て示す要部拡大図、第９図は第８
図を矢印の方向から見た図、第１０図は第８図
を矢印の方向から見た図である。 １…底刃、３…外周コーナ、４…微小フラツト
部、５…径方向内方の端面、α…中低角、β…底
刃二番角、Ｏ…工具軸、Ｄ…工具径、θ…径方向
内方端面の頂角。 FIG. 1 is a front view of a four-blade end mill as an example of the end mill according to the present invention, viewed from the bottom blade direction, FIG. 2 is a cross-sectional view of FIG. 1 taken along the - line, and FIG. The figure is a view of Figure 1 viewed from the direction of the arrow, Figure 4 is a diagram schematically showing the state of the blade of the end mill according to the present invention, and Figure 5 is a diagram schematically showing the state of front cutting with the end mill. 6 is an enlarged sectional view showing a cut surface cut face-cut by a conventional end mill. FIG. 7 is a plan view showing a cut surface cut face-cut by a conventional end mill. Figure 8 is an enlarged view of the main parts of a conventional end mill viewed from the direction of the bottom blade, and Figure 9 is an enlarged view of the main parts of the conventional end mill.
FIG. 10 is a view of FIG. 8 viewed from the direction of the arrow. 1...Bottom edge, 3...Outer periphery corner, 4...Minute flat part, 5...Radially inward end face, α...Medium/low angle, β...Bottom edge second angle, O...Tool axis, D...Tool diameter, θ ...Vertical angle of the radially inner end surface.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 底刃１の逃げ面が、外周コーナ３から径方向内
方へ工具径Ｄの０．１％〜１．０％の幅寸法で、
中底角αおよび底刃二番角βが共に０°となる微
小フラツト部４よりなり、該微小フラツト部４か
らさらに径方向内方の端面５は、工具軸Ｏを軸心
とする頂角θ１７９°〜１６０°の円錐凹面で逃
がしたことを特徴とするエンドミル。 The flank surface of the bottom cutter 1 has a width dimension of 0.1% to 1.0% of the tool diameter D from the outer peripheral corner 3 inward in the radial direction,
It consists of a minute flat part 4 in which both the middle base angle α and the second bottom edge angle β are 0°, and the end face 5 further radially inward from the minute flat part 4 has an apex angle with the tool axis O as the axis. An end mill characterized in that the relief is provided by a conical concave surface of θ179° to 160°.