JPH02126710U

JPH02126710U -

Info

Publication number: JPH02126710U
Application number: JP3367589U
Authority: JP
Priority date: 1989-03-24
Filing date: 1989-03-24
Publication date: 1990-10-18

Description

[Brief explanation of drawings]

第１図は本考案による組合せ材穿孔用ドリルの
実施例を示した正面図、第２図と第３図は夫々第
１図の組合せ材穿孔用ドリルの先端部を拡大して
示した側面図と正面図、第４図は上記組合せ材穿
孔用ドリルの先端部を拡大して示した正面図、第
５図は従来の金属用ドリルで複合材と金属材とか
ら成る組合せ材を穿孔した時の状態を示した説明
図、第６図は従来のダガードリルを示した斜視図
、第７図及び第８図は夫々第６図の−線矢視
及び−線矢視の側面図及び平面図である。１０……組合せ材穿孔用ドリル、１１……ドリ
ル先端部、１１Ａ……一次切刃、１１Ｂ……二次
切刃、１２……シヤツク部、１３……ねじれ溝、
β……一次切刃の先端角、γ……二次切刃の先端
角。 FIG. 1 is a front view showing an embodiment of the drill for drilling combination materials according to the present invention, and FIGS. 2 and 3 are side views showing enlarged tips of the drill for drilling combination materials shown in FIG. 1, respectively. 4 is a front view showing an enlarged front view of the tip of the drill for drilling combination materials, and FIG. FIG. 6 is a perspective view showing a conventional dagger drill, and FIGS. 7 and 8 are a side view and a plan view, respectively, taken in the direction of the - arrow and the - arrow in FIG. 6. It is. 10...Drill for drilling combination materials, 11...Drill tip, 11A...Primary cutting edge, 11B...Secondary cutting edge, 12...Shock portion, 13...Twisted groove,
β...Point angle of the primary cutting edge, γ...Point angle of the secondary cutting edge.

Claims

[Scope of utility model registration request]

A drill for drilling a composite material, in which a twisted chip discharge groove is formed from the tip of the drill to the vicinity of the shaft, and is used to drill a composite material and a metal material.
The tip of the drill is composed of a primary cutting edge having the tip shape of a metal drill and a flat secondary cutting edge formed continuously to the primary cutting edge, and the tip angle of the primary cutting edge is approximately 110 mm. 30°, and the tip angle of the secondary cutting edge is set at about 30°.